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spi: Updates for v5.10 

There's quite a lot of changes for SPI in this release but none in the
 core, they're all mostly small driver updates and additions.  Some of
 the more notable changes include:
 
  - A huge set of cleanups, optimizations and improvements for the
    DesignWare driver from Serge Semin finishing up the work started
    last release.
  - Conversion of the Zynq gqspi driver to spi-mem.
  - Support for Baikal T1, Broadcom BCMSTB 7445, and Renesas R8A7742.
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Merge tag 'spi-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "There's quite a lot of changes for SPI in this release but none in the
  core, they're all mostly small driver updates and additions. Some of
  the more notable changes include:

   - A huge set of cleanups, optimizations and improvements for the
     DesignWare driver from Serge Semin finishing up the work started
     last release.

   - Conversion of the Zynq gqspi driver to spi-mem.

   - Support for Baikal T1, Broadcom BCMSTB 7445, and Renesas R8A7742"

* tag 'spi-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (137 commits)
  spi: cadence: Add SPI transfer delays
  spi: dw: Add Baikal-T1 SPI Controller bindings
  spi: dw: Add Baikal-T1 SPI Controller glue driver
  spi: dw: Add poll-based SPI transfers support
  spi: dw: Introduce max mem-ops SPI bus frequency setting
  spi: dw: Add memory operations support
  spi: dw: Add generic DW SSI status-check method
  spi: dw: Move num-of retries parameter to the header file
  spi: dw: Explicitly de-assert CS on SPI transfer completion
  spi: dw: De-assert chip-select on reset
  spi: dw: Discard chip enabling on DMA setup error
  spi: dw: Unmask IRQs after enabling the chip
  spi: dw: Perform IRQ setup in a dedicated function
  spi: dw: Refactor IRQ-based SPI transfer procedure
  spi: dw: Refactor data IO procedure
  spi: dw: Add DW SPI controller config structure
  spi: dw: Update Rx sample delay in the config function
  spi: dw: Simplify the SPI bus speed config procedure
  spi: dw: Update SPI bus speed in a config function
  spi: dw: Detach SPI device specific CR0 config method
  ...
This commit is contained in:
Linus Torvalds 2020-10-13 10:03:12 -07:00
Родитель 1724e02e02 9887311813
Коммит a996b9c617
51 изменённых файлов: 3017 добавлений и 1381 удалений
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1
Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml
Просмотреть файл

@ -19,6 +19,7 @@ properties:
compatible:
enum:
- ibm,fsi2spi
- ibm,fsi2spi-restricted
reg:
items:

2
Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt
Просмотреть файл

@ -32,6 +32,8 @@ Required properties:
BRCMSTB SoCs
"brcm,spi-bcm7435-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
BRCMSTB SoCs
"brcm,spi-bcm7445-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
BRCMSTB SoCs
"brcm,spi-bcm7216-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
BRCMSTB SoCs
"brcm,spi-bcm7278-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI

86
Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml Normal file
Просмотреть файл

@ -0,0 +1,86 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/mediatek,spi-mtk-nor.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Serial NOR flash controller for MediaTek ARM SoCs
maintainers:
- Bayi Cheng <bayi.cheng@mediatek.com>
- Chuanhong Guo <gch981213@gmail.com>
description: |
This spi controller support single, dual, or quad mode transfer for
SPI NOR flash. There should be only one spi slave device following
generic spi bindings. It's not recommended to use this controller
for devices other than SPI NOR flash due to limited transfer
capability of this controller.
allOf:
- $ref: /spi/spi-controller.yaml#
properties:
compatible:
oneOf:
- items:
- enum:
- mediatek,mt2701-nor
- mediatek,mt2712-nor
- mediatek,mt7622-nor
- mediatek,mt7623-nor
- mediatek,mt7629-nor
- mediatek,mt8192-nor
- enum:
- mediatek,mt8173-nor
- items:
- const: mediatek,mt8173-nor
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
items:
- description: clock used for spi bus
- description: clock used for controller
clock-names:
items:
- const: spi
- const: sf
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/clock/mt8173-clk.h>
soc {
#address-cells = <2>;
#size-cells = <2>;
nor_flash: spi@1100d000 {
compatible = "mediatek,mt8173-nor";
reg = <0 0x1100d000 0 0xe0>;
interrupts = <&spi_flash_irq>;
clocks = <&pericfg CLK_PERI_SPI>, <&topckgen CLK_TOP_SPINFI_IFR_SEL>;
clock-names = "spi", "sf";
#address-cells = <1>;
#size-cells = <0>;
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
};
};
};

1
Documentation/devicetree/bindings/spi/renesas,rspi.yaml
Просмотреть файл

@ -25,6 +25,7 @@ properties:
- items:
- enum:
- renesas,qspi-r8a7742 # RZ/G1H
- renesas,qspi-r8a7743 # RZ/G1M
- renesas,qspi-r8a7744 # RZ/G1N
- renesas,qspi-r8a7745 # RZ/G1E

1
Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml
Просмотреть файл

@ -41,6 +41,7 @@ properties:
- renesas,msiof-r8a774e1 # RZ/G2H
- renesas,msiof-r8a7795 # R-Car H3
- renesas,msiof-r8a7796 # R-Car M3-W
- renesas,msiof-r8a77961 # R-Car M3-W+
- renesas,msiof-r8a77965 # R-Car M3-N
- renesas,msiof-r8a77970 # R-Car V3M
- renesas,msiof-r8a77980 # R-Car V3H

54
Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
Просмотреть файл

@ -22,6 +22,21 @@ allOf:
properties:
reg:
minItems: 2
- if:
properties:
compatible:
contains:
enum:
- baikal,bt1-sys-ssi
then:
properties:
mux-controls:
maxItems: 1
required:
- mux-controls
else:
required:
- interrupts
properties:
compatible:
@ -36,6 +51,8 @@ properties:
- mscc,ocelot-spi
- mscc,jaguar2-spi
- const: snps,dw-apb-ssi
- description: Microchip Sparx5 SoC SPI Controller
const: microchip,sparx5-spi
- description: Amazon Alpine SPI Controller
const: amazon,alpine-dw-apb-ssi
- description: Renesas RZ/N1 SPI Controller
@ -44,12 +61,16 @@ properties:
- const: snps,dw-apb-ssi
- description: Intel Keem Bay SPI Controller
const: intel,keembay-ssi
- description: Baikal-T1 SPI Controller
const: baikal,bt1-ssi
- description: Baikal-T1 System Boot SPI Controller
const: baikal,bt1-sys-ssi
reg:
minItems: 1
items:
- description: DW APB SSI controller memory mapped registers
- description: SPI MST region map
- description: SPI MST region map or directly mapped SPI ROM
interrupts:
maxItems: 1
@ -93,6 +114,12 @@ properties:
- const: tx
- const: rx
rx-sample-delay-ns:
default: 0
description: Default value of the rx-sample-delay-ns property.
This value will be used if the property is not explicitly defined
for a SPI slave device. See below.
patternProperties:
"^.*@[0-9a-f]+$":
type: object
@ -107,6 +134,13 @@ patternProperties:
spi-tx-bus-width:
const: 1
rx-sample-delay-ns:
description: SPI Rx sample delay offset, unit is nanoseconds.
The delay from the default sample time before the actual
sample of the rxd input signal occurs. The "rx_sample_delay"
is an optional feature of the designware controller, and the
upper limit is also subject to controller configuration.
unevaluatedProperties: false
required:
@ -114,7 +148,6 @@ required:
- reg
- "#address-cells"
- "#size-cells"
- interrupts
- clocks
examples:
@ -129,5 +162,22 @@ examples:
num-cs = <2>;
cs-gpios = <&gpio0 13 0>,
<&gpio0 14 0>;
rx-sample-delay-ns = <3>;
spi-flash@1 {
compatible = "spi-nand";
reg = <1>;
rx-sample-delay-ns = <7>;
};
};
- |
spi@1f040100 {
compatible = "baikal,bt1-sys-ssi";
reg = <0x1f040100 0x900>,
<0x1c000000 0x1000000>;
#address-cells = <1>;
#size-cells = <0>;
mux-controls = <&boot_mux>;
clocks = <&ccu_sys>;
clock-names = "ssi_clk";
};
...

47
Documentation/devicetree/bindings/spi/spi-mtk-nor.txt
Просмотреть файл

@ -1,47 +0,0 @@
* Serial NOR flash controller for MediaTek ARM SoCs
Required properties:
- compatible: For mt8173, compatible should be "mediatek,mt8173-nor",
and it's the fallback compatible for other Soc.
For every other SoC, should contain both the SoC-specific compatible
string and "mediatek,mt8173-nor".
The possible values are:
"mediatek,mt2701-nor", "mediatek,mt8173-nor"
"mediatek,mt2712-nor", "mediatek,mt8173-nor"
"mediatek,mt7622-nor", "mediatek,mt8173-nor"
"mediatek,mt7623-nor", "mediatek,mt8173-nor"
"mediatek,mt7629-nor", "mediatek,mt8173-nor"
"mediatek,mt8173-nor"
- reg: physical base address and length of the controller's register
- interrupts: Interrupt number used by the controller.
- clocks: the phandle of the clocks needed by the nor controller
- clock-names: the names of the clocks
the clocks should be named "spi" and "sf". "spi" is used for spi bus,
and "sf" is used for controller, these are the clocks witch
hardware needs to enabling nor flash and nor flash controller.
See Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
- #address-cells: should be <1>
- #size-cells: should be <0>
There should be only one spi slave device following generic spi bindings.
It's not recommended to use this controller for devices other than SPI NOR
flash due to limited transfer capability of this controller.
Example:
nor_flash: spi@1100d000 {
compatible = "mediatek,mt8173-nor";
reg = <0 0x1100d000 0 0xe0>;
interrupts = <&spi_flash_irq>;
clocks = <&pericfg CLK_PERI_SPI>,
<&topckgen CLK_TOP_SPINFI_IFR_SEL>;
clock-names = "spi", "sf";
#address-cells = <1>;
#size-cells = <0>;
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
};
};

31
drivers/spi/Kconfig
Просмотреть файл

@ -235,6 +235,7 @@ config SPI_DAVINCI
config SPI_DESIGNWARE
tristate "DesignWare SPI controller core support"
imply SPI_MEM
help
general driver for SPI controller core from DesignWare
@ -251,6 +252,34 @@ config SPI_DW_MMIO
tristate "Memory-mapped io interface driver for DW SPI core"
depends on HAS_IOMEM
config SPI_DW_BT1
tristate "Baikal-T1 SPI driver for DW SPI core"
depends on MIPS_BAIKAL_T1 || COMPILE_TEST
help
Baikal-T1 SoC is equipped with three DW APB SSI-based MMIO SPI
controllers. Two of them are pretty much normal: with IRQ, DMA,
FIFOs of 64 words depth, 4x CSs, but the third one as being a
part of the Baikal-T1 System Boot Controller has got a very
limited resources: no IRQ, no DMA, only a single native
chip-select and Tx/Rx FIFO with just 8 words depth available.
The later one is normally connected to an external SPI-nor flash
of 128Mb (in general can be of bigger size).
config SPI_DW_BT1_DIRMAP
bool "Directly mapped Baikal-T1 Boot SPI flash support"
depends on SPI_DW_BT1
select MULTIPLEXER
select MUX_MMIO
help
Directly mapped SPI flash memory is an interface specific to the
Baikal-T1 System Boot Controller. It is a 16MB MMIO region, which
can be used to access a peripheral memory device just by
reading/writing data from/to it. Note that the system APB bus
will stall during each IO from/to the dirmap region until the
operation is finished. So try not to use it concurrently with
time-critical tasks (like the SPI memory operations implemented
in this driver).
endif
config SPI_DLN2
@ -637,7 +666,7 @@ config SPI_QCOM_QSPI
config SPI_QUP
tristate "Qualcomm SPI controller with QUP interface"
depends on ARCH_QCOM || (ARM && COMPILE_TEST)
depends on ARCH_QCOM || COMPILE_TEST
help
Qualcomm Universal Peripheral (QUP) core is an AHB slave that
provides a common data path (an output FIFO and an input FIFO)

1
drivers/spi/Makefile
Просмотреть файл

@ -39,6 +39,7 @@ obj-$(CONFIG_SPI_DLN2) += spi-dln2.o
obj-$(CONFIG_SPI_DESIGNWARE) += spi-dw.o
spi-dw-y := spi-dw-core.o
spi-dw-$(CONFIG_SPI_DW_DMA) += spi-dw-dma.o
obj-$(CONFIG_SPI_DW_BT1) += spi-dw-bt1.o
obj-$(CONFIG_SPI_DW_MMIO) += spi-dw-mmio.o
obj-$(CONFIG_SPI_DW_PCI) += spi-dw-pci.o
obj-$(CONFIG_SPI_EFM32) += spi-efm32.o

1
drivers/spi/spi-armada-3700.c
Просмотреть файл

@ -848,7 +848,6 @@ static int a3700_spi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, master);
spi = spi_master_get_devdata(master);
memset(spi, 0, sizeof(struct a3700_spi));
spi->master = master;

6
drivers/spi/spi-atmel.c
Просмотреть файл

@ -513,9 +513,8 @@ static int atmel_spi_configure_dma(struct spi_master *master,
master->dma_tx = dma_request_chan(dev, "tx");
if (IS_ERR(master->dma_tx)) {
err = PTR_ERR(master->dma_tx);
if (err != -EPROBE_DEFER)
dev_err(dev, "No TX DMA channel, DMA is disabled\n");
err = dev_err_probe(dev, PTR_ERR(master->dma_tx),
"No TX DMA channel, DMA is disabled\n");
goto error_clear;
}
@ -859,6 +858,7 @@ static int atmel_spi_set_xfer_speed(struct atmel_spi *as,
csr = spi_readl(as, CSR0 + 4 * chip_select);
csr = SPI_BFINS(SCBR, scbr, csr);
spi_writel(as, CSR0 + 4 * chip_select, csr);
xfer->effective_speed_hz = bus_hz / scbr;
return 0;
}

13
drivers/spi/spi-bcm-qspi.c
Просмотреть файл

@ -1282,16 +1282,9 @@ static const struct bcm_qspi_data bcm_qspi_spcr3_data = {
static const struct of_device_id bcm_qspi_of_match[] = {
{
.compatible = "brcm,spi-bcm7425-qspi",
.data = &bcm_qspi_no_rev_data,
},
{
.compatible = "brcm,spi-bcm7429-qspi",
.data = &bcm_qspi_no_rev_data,
},
{
.compatible = "brcm,spi-bcm7435-qspi",
.data = &bcm_qspi_no_rev_data,
.compatible = "brcm,spi-bcm7445-qspi",
.data = &bcm_qspi_rev_data,
},
{
.compatible = "brcm,spi-bcm-qspi",

7
drivers/spi/spi-bcm2835.c
Просмотреть файл

@ -1319,11 +1319,8 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
bs->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(bs->clk)) {
err = PTR_ERR(bs->clk);
if (err == -EPROBE_DEFER)
dev_dbg(&pdev->dev, "could not get clk: %d\n", err);
else
dev_err(&pdev->dev, "could not get clk: %d\n", err);
err = dev_err_probe(&pdev->dev, PTR_ERR(bs->clk),
"could not get clk\n");
goto out_controller_put;
}

5
drivers/spi/spi-cadence-quadspi.c
Просмотреть файл

@ -1119,11 +1119,8 @@ static int cqspi_request_mmap_dma(struct cqspi_st *cqspi)
cqspi->rx_chan = dma_request_chan_by_mask(&mask);
if (IS_ERR(cqspi->rx_chan)) {
int ret = PTR_ERR(cqspi->rx_chan);
if (ret != -EPROBE_DEFER)
dev_err(&cqspi->pdev->dev, "No Rx DMA available\n");
cqspi->rx_chan = NULL;
return ret;
return dev_err_probe(&cqspi->pdev->dev, ret, "No Rx DMA available\n");
}
init_completion(&cqspi->rx_dma_complete);

2
drivers/spi/spi-cadence.c
Просмотреть файл

@ -418,8 +418,8 @@ static int cdns_transfer_one(struct spi_master *master,
xspi->rx_bytes = transfer->len;
cdns_spi_setup_transfer(spi, transfer);
cdns_spi_fill_tx_fifo(xspi);
spi_transfer_delay_exec(transfer);
cdns_spi_write(xspi, CDNS_SPI_IER, CDNS_SPI_IXR_DEFAULT);
return transfer->len;

339
drivers/spi/spi-dw-bt1.c Normal file
Просмотреть файл

@ -0,0 +1,339 @@
// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
//
// Authors:
// Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
// Serge Semin <Sergey.Semin@baikalelectronics.ru>
//
// Baikal-T1 DW APB SPI and System Boot SPI driver
//
#include <linux/clk.h>
#include <linux/cpumask.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mux/consumer.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/spi/spi-mem.h>
#include <linux/spi/spi.h>
#include "spi-dw.h"
#define BT1_BOOT_DIRMAP 0
#define BT1_BOOT_REGS 1
struct dw_spi_bt1 {
struct dw_spi dws;
struct clk *clk;
struct mux_control *mux;
#ifdef CONFIG_SPI_DW_BT1_DIRMAP
void __iomem *map;
resource_size_t map_len;
#endif
};
#define to_dw_spi_bt1(_ctlr) \
container_of(spi_controller_get_devdata(_ctlr), struct dw_spi_bt1, dws)
typedef int (*dw_spi_bt1_init_cb)(struct platform_device *pdev,
struct dw_spi_bt1 *dwsbt1);
#ifdef CONFIG_SPI_DW_BT1_DIRMAP
static int dw_spi_bt1_dirmap_create(struct spi_mem_dirmap_desc *desc)
{
struct dw_spi_bt1 *dwsbt1 = to_dw_spi_bt1(desc->mem->spi->controller);
if (!dwsbt1->map ||
!dwsbt1->dws.mem_ops.supports_op(desc->mem, &desc->info.op_tmpl))
return -EOPNOTSUPP;
/*
* Make sure the requested region doesn't go out of the physically
* mapped flash memory bounds and the operation is read-only.
*/
if (desc->info.offset + desc->info.length > dwsbt1->map_len ||
desc->info.op_tmpl.data.dir != SPI_MEM_DATA_IN)
return -EOPNOTSUPP;
return 0;
}
/*
* Directly mapped SPI memory region is only accessible in the dword chunks.
* That's why we have to create a dedicated read-method to copy data from there
* to the passed buffer.
*/
static void dw_spi_bt1_dirmap_copy_from_map(void *to, void __iomem *from, size_t len)
{
size_t shift, chunk;
u32 data;
/*
* We split the copying up into the next three stages: unaligned head,
* aligned body, unaligned tail.
*/
shift = (size_t)from & 0x3;
if (shift) {
chunk = min_t(size_t, 4 - shift, len);
data = readl_relaxed(from - shift);
memcpy(to, &data + shift, chunk);
from += chunk;
to += chunk;
len -= chunk;
}
while (len >= 4) {
data = readl_relaxed(from);
memcpy(to, &data, 4);
from += 4;
to += 4;
len -= 4;
}
if (len) {
data = readl_relaxed(from);
memcpy(to, &data, len);
}
}
static ssize_t dw_spi_bt1_dirmap_read(struct spi_mem_dirmap_desc *desc,
u64 offs, size_t len, void *buf)
{
struct dw_spi_bt1 *dwsbt1 = to_dw_spi_bt1(desc->mem->spi->controller);
struct dw_spi *dws = &dwsbt1->dws;
struct spi_mem *mem = desc->mem;
struct dw_spi_cfg cfg;
int ret;
/*
* Make sure the requested operation length is valid. Truncate the
* length if it's greater than the length of the MMIO region.
*/
if (offs >= dwsbt1->map_len || !len)
return 0;
len = min_t(size_t, len, dwsbt1->map_len - offs);
/* Collect the controller configuration required by the operation */
cfg.tmode = SPI_TMOD_EPROMREAD;
cfg.dfs = 8;
cfg.ndf = 4;
cfg.freq = mem->spi->max_speed_hz;
/* Make sure the corresponding CS is de-asserted on transmission */
dw_spi_set_cs(mem->spi, false);
spi_enable_chip(dws, 0);
dw_spi_update_config(dws, mem->spi, &cfg);
spi_umask_intr(dws, SPI_INT_RXFI);
spi_enable_chip(dws, 1);
/*
* Enable the transparent mode of the System Boot Controller.
* The SPI core IO should have been locked before calling this method
* so noone would be touching the controller' registers during the
* dirmap operation.
*/
ret = mux_control_select(dwsbt1->mux, BT1_BOOT_DIRMAP);
if (ret)
return ret;
dw_spi_bt1_dirmap_copy_from_map(buf, dwsbt1->map + offs, len);
mux_control_deselect(dwsbt1->mux);
dw_spi_set_cs(mem->spi, true);
ret = dw_spi_check_status(dws, true);
return ret ?: len;
}
#endif /* CONFIG_SPI_DW_BT1_DIRMAP */
static int dw_spi_bt1_std_init(struct platform_device *pdev,
struct dw_spi_bt1 *dwsbt1)
{
struct dw_spi *dws = &dwsbt1->dws;
dws->irq = platform_get_irq(pdev, 0);
if (dws->irq < 0)
return dws->irq;
dws->num_cs = 4;
/*
* Baikal-T1 Normal SPI Controllers don't always keep up with full SPI
* bus speed especially when it comes to the concurrent access to the
* APB bus resources. Thus we have no choice but to set a constraint on
* the SPI bus frequency for the memory operations which require to
* read/write data as fast as possible.
*/
dws->max_mem_freq = 20000000U;
dw_spi_dma_setup_generic(dws);
return 0;
}
static int dw_spi_bt1_sys_init(struct platform_device *pdev,
struct dw_spi_bt1 *dwsbt1)
{
struct resource *mem __maybe_unused;
struct dw_spi *dws = &dwsbt1->dws;
/*
* Baikal-T1 System Boot Controller is equipped with a mux, which
* switches between the directly mapped SPI flash access mode and
* IO access to the DW APB SSI registers. Note the mux controller
* must be setup to preserve the registers being accessible by default
* (on idle-state).
*/
dwsbt1->mux = devm_mux_control_get(&pdev->dev, NULL);
if (IS_ERR(dwsbt1->mux))
return PTR_ERR(dwsbt1->mux);
/*
* Directly mapped SPI flash memory is a 16MB MMIO region, which can be
* used to access a peripheral memory device just by reading/writing
* data from/to it. Note the system APB bus will stall during each IO
* from/to the dirmap region until the operation is finished. So don't
* use it concurrently with time-critical tasks (like the SPI memory
* operations implemented in the DW APB SSI driver).
*/
#ifdef CONFIG_SPI_DW_BT1_DIRMAP
mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (mem) {
dwsbt1->map = devm_ioremap_resource(&pdev->dev, mem);
if (!IS_ERR(dwsbt1->map)) {
dwsbt1->map_len = (mem->end - mem->start + 1);
dws->mem_ops.dirmap_create = dw_spi_bt1_dirmap_create;
dws->mem_ops.dirmap_read = dw_spi_bt1_dirmap_read;
} else {
dwsbt1->map = NULL;
}
}
#endif /* CONFIG_SPI_DW_BT1_DIRMAP */
/*
* There is no IRQ, no DMA and just one CS available on the System Boot
* SPI controller.
*/
dws->irq = IRQ_NOTCONNECTED;
dws->num_cs = 1;
/*
* Baikal-T1 System Boot SPI Controller doesn't keep up with the full
* SPI bus speed due to relatively slow APB bus and races for it'
* resources from different CPUs. The situation is worsen by a small
* FIFOs depth (just 8 words). It works better in a single CPU mode
* though, but still tends to be not fast enough at low CPU
* frequencies.
*/
if (num_possible_cpus() > 1)
dws->max_mem_freq = 10000000U;
else
dws->max_mem_freq = 20000000U;
return 0;
}
static int dw_spi_bt1_probe(struct platform_device *pdev)
{
dw_spi_bt1_init_cb init_func;
struct dw_spi_bt1 *dwsbt1;
struct resource *mem;
struct dw_spi *dws;
int ret;
dwsbt1 = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_bt1), GFP_KERNEL);
if (!dwsbt1)
return -ENOMEM;
dws = &dwsbt1->dws;
dws->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
if (IS_ERR(dws->regs))
return PTR_ERR(dws->regs);
dws->paddr = mem->start;
dwsbt1->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(dwsbt1->clk))
return PTR_ERR(dwsbt1->clk);
ret = clk_prepare_enable(dwsbt1->clk);
if (ret)
return ret;
dws->bus_num = pdev->id;
dws->reg_io_width = 4;
dws->max_freq = clk_get_rate(dwsbt1->clk);
if (!dws->max_freq)
goto err_disable_clk;
init_func = device_get_match_data(&pdev->dev);
ret = init_func(pdev, dwsbt1);
if (ret)
goto err_disable_clk;
pm_runtime_enable(&pdev->dev);
ret = dw_spi_add_host(&pdev->dev, dws);
if (ret)
goto err_disable_clk;
platform_set_drvdata(pdev, dwsbt1);
return 0;
err_disable_clk:
clk_disable_unprepare(dwsbt1->clk);
return ret;
}
static int dw_spi_bt1_remove(struct platform_device *pdev)
{
struct dw_spi_bt1 *dwsbt1 = platform_get_drvdata(pdev);
dw_spi_remove_host(&dwsbt1->dws);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(dwsbt1->clk);
return 0;
}
static const struct of_device_id dw_spi_bt1_of_match[] = {
{ .compatible = "baikal,bt1-ssi", .data = dw_spi_bt1_std_init},
{ .compatible = "baikal,bt1-sys-ssi", .data = dw_spi_bt1_sys_init},
{ }
};
MODULE_DEVICE_TABLE(of, dw_spi_bt1_of_match);
static struct platform_driver dw_spi_bt1_driver = {
.probe = dw_spi_bt1_probe,
.remove = dw_spi_bt1_remove,
.driver = {
.name = "bt1-sys-ssi",
.of_match_table = dw_spi_bt1_of_match,
},
};
module_platform_driver(dw_spi_bt1_driver);
MODULE_AUTHOR("Serge Semin <Sergey.Semin@baikalelectronics.ru>");
MODULE_DESCRIPTION("Baikal-T1 System Boot SPI Controller driver");
MODULE_LICENSE("GPL v2");

685
drivers/spi/spi-dw-core.c
Просмотреть файл

@ -8,10 +8,14 @@
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/preempt.h>
#include <linux/highmem.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
#include <linux/string.h>
#include <linux/of.h>
#include "spi-dw.h"
@ -19,13 +23,10 @@
#include <linux/debugfs.h>
#endif
/* Slave spi_dev related */
/* Slave spi_device related */
struct chip_data {
u8 tmode; /* TR/TO/RO/EEPROM */
u8 type; /* SPI/SSP/MicroWire */
u16 clk_div; /* baud rate divider */
u32 speed_hz; /* baud rate */
u32 cr0;
u32 rx_sample_dly; /* RX sample delay */
};
#ifdef CONFIG_DEBUG_FS
@ -52,6 +53,7 @@ static const struct debugfs_reg32 dw_spi_dbgfs_regs[] = {
DW_SPI_DBGFS_REG("DMACR", DW_SPI_DMACR),
DW_SPI_DBGFS_REG("DMATDLR", DW_SPI_DMATDLR),
DW_SPI_DBGFS_REG("DMARDLR", DW_SPI_DMARDLR),
DW_SPI_DBGFS_REG("RX_SAMPLE_DLY", DW_SPI_RX_SAMPLE_DLY),
};
static int dw_spi_debugfs_init(struct dw_spi *dws)
@ -101,7 +103,7 @@ void dw_spi_set_cs(struct spi_device *spi, bool enable)
*/
if (cs_high == enable)
dw_writel(dws, DW_SPI_SER, BIT(spi->chip_select));
else if (dws->cs_override)
else
dw_writel(dws, DW_SPI_SER, 0);
}
EXPORT_SYMBOL_GPL(dw_spi_set_cs);
@ -109,9 +111,8 @@ EXPORT_SYMBOL_GPL(dw_spi_set_cs);
/* Return the max entries we can fill into tx fifo */
static inline u32 tx_max(struct dw_spi *dws)
{
u32 tx_left, tx_room, rxtx_gap;
u32 tx_room, rxtx_gap;
tx_left = (dws->tx_end - dws->tx) / dws->n_bytes;
tx_room = dws->fifo_len - dw_readl(dws, DW_SPI_TXFLR);
/*
@ -122,93 +123,124 @@ static inline u32 tx_max(struct dw_spi *dws)
* shift registers. So a control from sw point of
* view is taken.
*/
rxtx_gap = ((dws->rx_end - dws->rx) - (dws->tx_end - dws->tx))
/ dws->n_bytes;
rxtx_gap = dws->fifo_len - (dws->rx_len - dws->tx_len);
return min3(tx_left, tx_room, (u32) (dws->fifo_len - rxtx_gap));
return min3((u32)dws->tx_len, tx_room, rxtx_gap);
}
/* Return the max entries we should read out of rx fifo */
static inline u32 rx_max(struct dw_spi *dws)
{
u32 rx_left = (dws->rx_end - dws->rx) / dws->n_bytes;
return min_t(u32, rx_left, dw_readl(dws, DW_SPI_RXFLR));
return min_t(u32, dws->rx_len, dw_readl(dws, DW_SPI_RXFLR));
}
static void dw_writer(struct dw_spi *dws)
{
u32 max;
u32 max = tx_max(dws);
u16 txw = 0;
spin_lock(&dws->buf_lock);
max = tx_max(dws);
while (max--) {
/* Set the tx word if the transfer's original "tx" is not null */
if (dws->tx_end - dws->len) {
if (dws->tx) {
if (dws->n_bytes == 1)
txw = *(u8 *)(dws->tx);
else
txw = *(u16 *)(dws->tx);
dws->tx += dws->n_bytes;
}
dw_write_io_reg(dws, DW_SPI_DR, txw);
dws->tx += dws->n_bytes;
--dws->tx_len;
}
spin_unlock(&dws->buf_lock);
}
static void dw_reader(struct dw_spi *dws)
{
u32 max;
u32 max = rx_max(dws);
u16 rxw;
spin_lock(&dws->buf_lock);
max = rx_max(dws);
while (max--) {
rxw = dw_read_io_reg(dws, DW_SPI_DR);
/* Care rx only if the transfer's original "rx" is not null */
if (dws->rx_end - dws->len) {
if (dws->rx) {
if (dws->n_bytes == 1)
*(u8 *)(dws->rx) = rxw;
else
*(u16 *)(dws->rx) = rxw;
dws->rx += dws->n_bytes;
}
dws->rx += dws->n_bytes;
--dws->rx_len;
}
spin_unlock(&dws->buf_lock);
}
static void int_error_stop(struct dw_spi *dws, const char *msg)
int dw_spi_check_status(struct dw_spi *dws, bool raw)
{
spi_reset_chip(dws);
u32 irq_status;
int ret = 0;
dev_err(&dws->master->dev, "%s\n", msg);
dws->master->cur_msg->status = -EIO;
spi_finalize_current_transfer(dws->master);
if (raw)
irq_status = dw_readl(dws, DW_SPI_RISR);
else
irq_status = dw_readl(dws, DW_SPI_ISR);
if (irq_status & SPI_INT_RXOI) {
dev_err(&dws->master->dev, "RX FIFO overflow detected\n");
ret = -EIO;
}
if (irq_status & SPI_INT_RXUI) {
dev_err(&dws->master->dev, "RX FIFO underflow detected\n");
ret = -EIO;
}
if (irq_status & SPI_INT_TXOI) {
dev_err(&dws->master->dev, "TX FIFO overflow detected\n");
ret = -EIO;
}
/* Generically handle the erroneous situation */
if (ret) {
spi_reset_chip(dws);
if (dws->master->cur_msg)
dws->master->cur_msg->status = ret;
}
return ret;
}
EXPORT_SYMBOL_GPL(dw_spi_check_status);
static irqreturn_t interrupt_transfer(struct dw_spi *dws)
static irqreturn_t dw_spi_transfer_handler(struct dw_spi *dws)
{
u16 irq_status = dw_readl(dws, DW_SPI_ISR);
/* Error handling */
if (irq_status & (SPI_INT_TXOI | SPI_INT_RXOI | SPI_INT_RXUI)) {
dw_readl(dws, DW_SPI_ICR);
int_error_stop(dws, "interrupt_transfer: fifo overrun/underrun");
return IRQ_HANDLED;
}
dw_reader(dws);
if (dws->rx_end == dws->rx) {
spi_mask_intr(dws, SPI_INT_TXEI);
if (dw_spi_check_status(dws, false)) {
spi_finalize_current_transfer(dws->master);
return IRQ_HANDLED;
}
/*
* Read data from the Rx FIFO every time we've got a chance executing
* this method. If there is nothing left to receive, terminate the
* procedure. Otherwise adjust the Rx FIFO Threshold level if it's a
* final stage of the transfer. By doing so we'll get the next IRQ
* right when the leftover incoming data is received.
*/
dw_reader(dws);
if (!dws->rx_len) {
spi_mask_intr(dws, 0xff);
spi_finalize_current_transfer(dws->master);
} else if (dws->rx_len <= dw_readl(dws, DW_SPI_RXFTLR)) {
dw_writel(dws, DW_SPI_RXFTLR, dws->rx_len - 1);
}
/*
* Send data out if Tx FIFO Empty IRQ is received. The IRQ will be
* disabled after the data transmission is finished so not to
* have the TXE IRQ flood at the final stage of the transfer.
*/
if (irq_status & SPI_INT_TXEI) {
spi_mask_intr(dws, SPI_INT_TXEI);
dw_writer(dws);
/* Enable TX irq always, it will be disabled when RX finished */
spi_umask_intr(dws, SPI_INT_TXEI);
if (!dws->tx_len)
spi_mask_intr(dws, SPI_INT_TXEI);
}
return IRQ_HANDLED;
@ -224,105 +256,176 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id)
return IRQ_NONE;
if (!master->cur_msg) {
spi_mask_intr(dws, SPI_INT_TXEI);
spi_mask_intr(dws, 0xff);
return IRQ_HANDLED;
}
return dws->transfer_handler(dws);
}
/* Configure CTRLR0 for DW_apb_ssi */
u32 dw_spi_update_cr0(struct spi_controller *master, struct spi_device *spi,
struct spi_transfer *transfer)
static u32 dw_spi_prepare_cr0(struct dw_spi *dws, struct spi_device *spi)
{
struct chip_data *chip = spi_get_ctldata(spi);
u32 cr0;
u32 cr0 = 0;
/* Default SPI mode is SCPOL = 0, SCPH = 0 */
cr0 = (transfer->bits_per_word - 1)
| (chip->type << SPI_FRF_OFFSET)
| ((((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET) |
(((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET) |
(((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET))
| (chip->tmode << SPI_TMOD_OFFSET);
if (!(dws->caps & DW_SPI_CAP_DWC_SSI)) {
/* CTRLR0[ 5: 4] Frame Format */
cr0 |= SSI_MOTO_SPI << SPI_FRF_OFFSET;
/*
* SPI mode (SCPOL|SCPH)
* CTRLR0[ 6] Serial Clock Phase
* CTRLR0[ 7] Serial Clock Polarity
*/
cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET;
cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET;
/* CTRLR0[11] Shift Register Loop */
cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET;
} else {
/* CTRLR0[ 7: 6] Frame Format */
cr0 |= SSI_MOTO_SPI << DWC_SSI_CTRLR0_FRF_OFFSET;
/*
* SPI mode (SCPOL|SCPH)
* CTRLR0[ 8] Serial Clock Phase
* CTRLR0[ 9] Serial Clock Polarity
*/
cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << DWC_SSI_CTRLR0_SCPOL_OFFSET;
cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << DWC_SSI_CTRLR0_SCPH_OFFSET;
/* CTRLR0[13] Shift Register Loop */
cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DWC_SSI_CTRLR0_SRL_OFFSET;
if (dws->caps & DW_SPI_CAP_KEEMBAY_MST)
cr0 |= DWC_SSI_CTRLR0_KEEMBAY_MST;
}
return cr0;
}
EXPORT_SYMBOL_GPL(dw_spi_update_cr0);
/* Configure CTRLR0 for DWC_ssi */
u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master,
struct spi_device *spi,
struct spi_transfer *transfer)
void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi,
struct dw_spi_cfg *cfg)
{
struct chip_data *chip = spi_get_ctldata(spi);
u32 cr0;
u32 cr0 = chip->cr0;
u32 speed_hz;
u16 clk_div;
/* CTRLR0[ 4: 0] Data Frame Size */
cr0 = (transfer->bits_per_word - 1);
/* CTRLR0[ 4/3: 0] Data Frame Size */
cr0 |= (cfg->dfs - 1);
/* CTRLR0[ 7: 6] Frame Format */
cr0 |= chip->type << DWC_SSI_CTRLR0_FRF_OFFSET;
if (!(dws->caps & DW_SPI_CAP_DWC_SSI))
/* CTRLR0[ 9:8] Transfer Mode */
cr0 |= cfg->tmode << SPI_TMOD_OFFSET;
else
/* CTRLR0[11:10] Transfer Mode */
cr0 |= cfg->tmode << DWC_SSI_CTRLR0_TMOD_OFFSET;
dw_writel(dws, DW_SPI_CTRLR0, cr0);
if (cfg->tmode == SPI_TMOD_EPROMREAD || cfg->tmode == SPI_TMOD_RO)
dw_writel(dws, DW_SPI_CTRLR1, cfg->ndf ? cfg->ndf - 1 : 0);
/* Note DW APB SSI clock divider doesn't support odd numbers */
clk_div = (DIV_ROUND_UP(dws->max_freq, cfg->freq) + 1) & 0xfffe;
speed_hz = dws->max_freq / clk_div;
if (dws->current_freq != speed_hz) {
spi_set_clk(dws, clk_div);
dws->current_freq = speed_hz;
}
/* Update RX sample delay if required */
if (dws->cur_rx_sample_dly != chip->rx_sample_dly) {
dw_writel(dws, DW_SPI_RX_SAMPLE_DLY, chip->rx_sample_dly);
dws->cur_rx_sample_dly = chip->rx_sample_dly;
}
}
EXPORT_SYMBOL_GPL(dw_spi_update_config);
static void dw_spi_irq_setup(struct dw_spi *dws)
{
u16 level;
u8 imask;
/*
* SPI mode (SCPOL|SCPH)
* CTRLR0[ 8] Serial Clock Phase
* CTRLR0[ 9] Serial Clock Polarity
* Originally Tx and Rx data lengths match. Rx FIFO Threshold level
* will be adjusted at the final stage of the IRQ-based SPI transfer
* execution so not to lose the leftover of the incoming data.
*/
cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << DWC_SSI_CTRLR0_SCPOL_OFFSET;
cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << DWC_SSI_CTRLR0_SCPH_OFFSET;
level = min_t(u16, dws->fifo_len / 2, dws->tx_len);
dw_writel(dws, DW_SPI_TXFTLR, level);
dw_writel(dws, DW_SPI_RXFTLR, level - 1);
/* CTRLR0[11:10] Transfer Mode */
cr0 |= chip->tmode << DWC_SSI_CTRLR0_TMOD_OFFSET;
imask = SPI_INT_TXEI | SPI_INT_TXOI | SPI_INT_RXUI | SPI_INT_RXOI |
SPI_INT_RXFI;
spi_umask_intr(dws, imask);
/* CTRLR0[13] Shift Register Loop */
cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DWC_SSI_CTRLR0_SRL_OFFSET;
return cr0;
dws->transfer_handler = dw_spi_transfer_handler;
}
/*
* The iterative procedure of the poll-based transfer is simple: write as much
* as possible to the Tx FIFO, wait until the pending to receive data is ready
* to be read, read it from the Rx FIFO and check whether the performed
* procedure has been successful.
*
* Note this method the same way as the IRQ-based transfer won't work well for
* the SPI devices connected to the controller with native CS due to the
* automatic CS assertion/de-assertion.
*/
static int dw_spi_poll_transfer(struct dw_spi *dws,
struct spi_transfer *transfer)
{
struct spi_delay delay;
u16 nbits;
int ret;
delay.unit = SPI_DELAY_UNIT_SCK;
nbits = dws->n_bytes * BITS_PER_BYTE;
do {
dw_writer(dws);
delay.value = nbits * (dws->rx_len - dws->tx_len);
spi_delay_exec(&delay, transfer);
dw_reader(dws);
ret = dw_spi_check_status(dws, true);
if (ret)
return ret;
} while (dws->rx_len);
return 0;
}
EXPORT_SYMBOL_GPL(dw_spi_update_cr0_v1_01a);
static int dw_spi_transfer_one(struct spi_controller *master,
struct spi_device *spi, struct spi_transfer *transfer)
{
struct dw_spi *dws = spi_controller_get_devdata(master);
struct chip_data *chip = spi_get_ctldata(spi);
unsigned long flags;
u8 imask = 0;
u16 txlevel = 0;
u32 cr0;
struct dw_spi_cfg cfg = {
.tmode = SPI_TMOD_TR,
.dfs = transfer->bits_per_word,
.freq = transfer->speed_hz,
};
int ret;
dws->dma_mapped = 0;
spin_lock_irqsave(&dws->buf_lock, flags);
dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE);
dws->tx = (void *)transfer->tx_buf;
dws->tx_end = dws->tx + transfer->len;
dws->tx_len = transfer->len / dws->n_bytes;
dws->rx = transfer->rx_buf;
dws->rx_end = dws->rx + transfer->len;
dws->len = transfer->len;
spin_unlock_irqrestore(&dws->buf_lock, flags);
dws->rx_len = dws->tx_len;
/* Ensure dw->rx and dw->rx_end are visible */
/* Ensure the data above is visible for all CPUs */
smp_mb();
spi_enable_chip(dws, 0);
/* Handle per transfer options for bpw and speed */
if (transfer->speed_hz != dws->current_freq) {
if (transfer->speed_hz != chip->speed_hz) {
/* clk_div doesn't support odd number */
chip->clk_div = (DIV_ROUND_UP(dws->max_freq, transfer->speed_hz) + 1) & 0xfffe;
chip->speed_hz = transfer->speed_hz;
}
dws->current_freq = transfer->speed_hz;
spi_set_clk(dws, chip->clk_div);
}
dw_spi_update_config(dws, spi, &cfg);
transfer->effective_speed_hz = dws->max_freq / chip->clk_div;
dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE);
cr0 = dws->update_cr0(master, spi, transfer);
dw_writel(dws, DW_SPI_CTRLR0, cr0);
transfer->effective_speed_hz = dws->current_freq;
/* Check if current transfer is a DMA transaction */
if (master->can_dma && master->can_dma(master, spi, transfer))
@ -331,32 +434,20 @@ static int dw_spi_transfer_one(struct spi_controller *master,
/* For poll mode just disable all interrupts */
spi_mask_intr(dws, 0xff);
/*
* Interrupt mode
* we only need set the TXEI IRQ, as TX/RX always happen syncronizely
*/
if (dws->dma_mapped) {
ret = dws->dma_ops->dma_setup(dws, transfer);
if (ret < 0) {
spi_enable_chip(dws, 1);
if (ret)
return ret;
}
} else {
txlevel = min_t(u16, dws->fifo_len / 2, dws->len / dws->n_bytes);
dw_writel(dws, DW_SPI_TXFTLR, txlevel);
/* Set the interrupt mask */
imask |= SPI_INT_TXEI | SPI_INT_TXOI |
SPI_INT_RXUI | SPI_INT_RXOI;
spi_umask_intr(dws, imask);
dws->transfer_handler = interrupt_transfer;
}
spi_enable_chip(dws, 1);
if (dws->dma_mapped)
return dws->dma_ops->dma_transfer(dws, transfer);
else if (dws->irq == IRQ_NOTCONNECTED)
return dw_spi_poll_transfer(dws, transfer);
dw_spi_irq_setup(dws);
return 1;
}
@ -372,21 +463,336 @@ static void dw_spi_handle_err(struct spi_controller *master,
spi_reset_chip(dws);
}
static int dw_spi_adjust_mem_op_size(struct spi_mem *mem, struct spi_mem_op *op)
{
if (op->data.dir == SPI_MEM_DATA_IN)
op->data.nbytes = clamp_val(op->data.nbytes, 0, SPI_NDF_MASK + 1);
return 0;
}
static bool dw_spi_supports_mem_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
if (op->data.buswidth > 1 || op->addr.buswidth > 1 ||
op->dummy.buswidth > 1 || op->cmd.buswidth > 1)
return false;
return spi_mem_default_supports_op(mem, op);
}
static int dw_spi_init_mem_buf(struct dw_spi *dws, const struct spi_mem_op *op)
{
unsigned int i, j, len;
u8 *out;
/*
* Calculate the total length of the EEPROM command transfer and
* either use the pre-allocated buffer or create a temporary one.
*/
len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes;
if (op->data.dir == SPI_MEM_DATA_OUT)
len += op->data.nbytes;
if (len <= SPI_BUF_SIZE) {
out = dws->buf;
} else {
out = kzalloc(len, GFP_KERNEL);
if (!out)
return -ENOMEM;
}
/*
* Collect the operation code, address and dummy bytes into the single
* buffer. If it's a transfer with data to be sent, also copy it into the
* single buffer in order to speed the data transmission up.
*/
for (i = 0; i < op->cmd.nbytes; ++i)
out[i] = SPI_GET_BYTE(op->cmd.opcode, op->cmd.nbytes - i - 1);
for (j = 0; j < op->addr.nbytes; ++i, ++j)
out[i] = SPI_GET_BYTE(op->addr.val, op->addr.nbytes - j - 1);
for (j = 0; j < op->dummy.nbytes; ++i, ++j)
out[i] = 0x0;
if (op->data.dir == SPI_MEM_DATA_OUT)
memcpy(&out[i], op->data.buf.out, op->data.nbytes);
dws->n_bytes = 1;
dws->tx = out;
dws->tx_len = len;
if (op->data.dir == SPI_MEM_DATA_IN) {
dws->rx = op->data.buf.in;
dws->rx_len = op->data.nbytes;
} else {
dws->rx = NULL;
dws->rx_len = 0;
}
return 0;
}
static void dw_spi_free_mem_buf(struct dw_spi *dws)
{
if (dws->tx != dws->buf)
kfree(dws->tx);
}
static int dw_spi_write_then_read(struct dw_spi *dws, struct spi_device *spi)
{
u32 room, entries, sts;
unsigned int len;
u8 *buf;
/*
* At initial stage we just pre-fill the Tx FIFO in with no rush,
* since native CS hasn't been enabled yet and the automatic data
* transmission won't start til we do that.
*/
len = min(dws->fifo_len, dws->tx_len);
buf = dws->tx;
while (len--)
dw_write_io_reg(dws, DW_SPI_DR, *buf++);
/*
* After setting any bit in the SER register the transmission will
* start automatically. We have to keep up with that procedure
* otherwise the CS de-assertion will happen whereupon the memory
* operation will be pre-terminated.
*/
len = dws->tx_len - ((void *)buf - dws->tx);
dw_spi_set_cs(spi, false);
while (len) {
entries = readl_relaxed(dws->regs + DW_SPI_TXFLR);
if (!entries) {
dev_err(&dws->master->dev, "CS de-assertion on Tx\n");
return -EIO;
}
room = min(dws->fifo_len - entries, len);
for (; room; --room, --len)
dw_write_io_reg(dws, DW_SPI_DR, *buf++);
}
/*
* Data fetching will start automatically if the EEPROM-read mode is
* activated. We have to keep up with the incoming data pace to
* prevent the Rx FIFO overflow causing the inbound data loss.
*/
len = dws->rx_len;
buf = dws->rx;
while (len) {
entries = readl_relaxed(dws->regs + DW_SPI_RXFLR);
if (!entries) {
sts = readl_relaxed(dws->regs + DW_SPI_RISR);
if (sts & SPI_INT_RXOI) {
dev_err(&dws->master->dev, "FIFO overflow on Rx\n");
return -EIO;
}
continue;
}
entries = min(entries, len);
for (; entries; --entries, --len)
*buf++ = dw_read_io_reg(dws, DW_SPI_DR);
}
return 0;
}
static inline bool dw_spi_ctlr_busy(struct dw_spi *dws)
{
return dw_readl(dws, DW_SPI_SR) & SR_BUSY;
}
static int dw_spi_wait_mem_op_done(struct dw_spi *dws)
{
int retry = SPI_WAIT_RETRIES;
struct spi_delay delay;
unsigned long ns, us;
u32 nents;
nents = dw_readl(dws, DW_SPI_TXFLR);
ns = NSEC_PER_SEC / dws->current_freq * nents;
ns *= dws->n_bytes * BITS_PER_BYTE;
if (ns <= NSEC_PER_USEC) {
delay.unit = SPI_DELAY_UNIT_NSECS;
delay.value = ns;
} else {
us = DIV_ROUND_UP(ns, NSEC_PER_USEC);
delay.unit = SPI_DELAY_UNIT_USECS;
delay.value = clamp_val(us, 0, USHRT_MAX);
}
while (dw_spi_ctlr_busy(dws) && retry--)
spi_delay_exec(&delay, NULL);
if (retry < 0) {
dev_err(&dws->master->dev, "Mem op hanged up\n");
return -EIO;
}
return 0;
}
static void dw_spi_stop_mem_op(struct dw_spi *dws, struct spi_device *spi)
{
spi_enable_chip(dws, 0);
dw_spi_set_cs(spi, true);
spi_enable_chip(dws, 1);
}
/*
* The SPI memory operation implementation below is the best choice for the
* devices, which are selected by the native chip-select lane. It's
* specifically developed to workaround the problem with automatic chip-select
* lane toggle when there is no data in the Tx FIFO buffer. Luckily the current
* SPI-mem core calls exec_op() callback only if the GPIO-based CS is
* unavailable.
*/
static int dw_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op)
{
struct dw_spi *dws = spi_controller_get_devdata(mem->spi->controller);
struct dw_spi_cfg cfg;
unsigned long flags;
int ret;
/*
* Collect the outbound data into a single buffer to speed the
* transmission up at least on the initial stage.
*/
ret = dw_spi_init_mem_buf(dws, op);
if (ret)
return ret;
/*
* DW SPI EEPROM-read mode is required only for the SPI memory Data-IN
* operation. Transmit-only mode is suitable for the rest of them.
*/
cfg.dfs = 8;
cfg.freq = clamp(mem->spi->max_speed_hz, 0U, dws->max_mem_freq);
if (op->data.dir == SPI_MEM_DATA_IN) {
cfg.tmode = SPI_TMOD_EPROMREAD;
cfg.ndf = op->data.nbytes;
} else {
cfg.tmode = SPI_TMOD_TO;
}
spi_enable_chip(dws, 0);
dw_spi_update_config(dws, mem->spi, &cfg);
spi_mask_intr(dws, 0xff);
spi_enable_chip(dws, 1);
/*
* DW APB SSI controller has very nasty peculiarities. First originally
* (without any vendor-specific modifications) it doesn't provide a
* direct way to set and clear the native chip-select signal. Instead
* the controller asserts the CS lane if Tx FIFO isn't empty and a
* transmission is going on, and automatically de-asserts it back to
* the high level if the Tx FIFO doesn't have anything to be pushed
* out. Due to that a multi-tasking or heavy IRQs activity might be
* fatal, since the transfer procedure preemption may cause the Tx FIFO
* getting empty and sudden CS de-assertion, which in the middle of the
* transfer will most likely cause the data loss. Secondly the
* EEPROM-read or Read-only DW SPI transfer modes imply the incoming
* data being automatically pulled in into the Rx FIFO. So if the
* driver software is late in fetching the data from the FIFO before
* it's overflown, new incoming data will be lost. In order to make
* sure the executed memory operations are CS-atomic and to prevent the
* Rx FIFO overflow we have to disable the local interrupts so to block
* any preemption during the subsequent IO operations.
*
* Note. At some circumstances disabling IRQs may not help to prevent
* the problems described above. The CS de-assertion and Rx FIFO
* overflow may still happen due to the relatively slow system bus or
* CPU not working fast enough, so the write-then-read algo implemented
* here just won't keep up with the SPI bus data transfer. Such
* situation is highly platform specific and is supposed to be fixed by
* manually restricting the SPI bus frequency using the
* dws->max_mem_freq parameter.
*/
local_irq_save(flags);
preempt_disable();
ret = dw_spi_write_then_read(dws, mem->spi);
local_irq_restore(flags);
preempt_enable();
/*
* Wait for the operation being finished and check the controller
* status only if there hasn't been any run-time error detected. In the
* former case it's just pointless. In the later one to prevent an
* additional error message printing since any hw error flag being set
* would be due to an error detected on the data transfer.
*/
if (!ret) {
ret = dw_spi_wait_mem_op_done(dws);
if (!ret)
ret = dw_spi_check_status(dws, true);
}
dw_spi_stop_mem_op(dws, mem->spi);
dw_spi_free_mem_buf(dws);
return ret;
}
/*
* Initialize the default memory operations if a glue layer hasn't specified
* custom ones. Direct mapping operations will be preserved anyway since DW SPI
* controller doesn't have an embedded dirmap interface. Note the memory
* operations implemented in this driver is the best choice only for the DW APB
* SSI controller with standard native CS functionality. If a hardware vendor
* has fixed the automatic CS assertion/de-assertion peculiarity, then it will
* be safer to use the normal SPI-messages-based transfers implementation.
*/
static void dw_spi_init_mem_ops(struct dw_spi *dws)
{
if (!dws->mem_ops.exec_op && !(dws->caps & DW_SPI_CAP_CS_OVERRIDE) &&
!dws->set_cs) {
dws->mem_ops.adjust_op_size = dw_spi_adjust_mem_op_size;
dws->mem_ops.supports_op = dw_spi_supports_mem_op;
dws->mem_ops.exec_op = dw_spi_exec_mem_op;
if (!dws->max_mem_freq)
dws->max_mem_freq = dws->max_freq;
}
}
/* This may be called twice for each spi dev */
static int dw_spi_setup(struct spi_device *spi)
{
struct dw_spi *dws = spi_controller_get_devdata(spi->controller);
struct chip_data *chip;
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (!chip) {
struct dw_spi *dws = spi_controller_get_devdata(spi->controller);
u32 rx_sample_dly_ns;
chip = kzalloc(sizeof(struct chip_data), GFP_KERNEL);
if (!chip)
return -ENOMEM;
spi_set_ctldata(spi, chip);
/* Get specific / default rx-sample-delay */
if (device_property_read_u32(&spi->dev,
"rx-sample-delay-ns",
&rx_sample_dly_ns) != 0)
/* Use default controller value */
rx_sample_dly_ns = dws->def_rx_sample_dly_ns;
chip->rx_sample_dly = DIV_ROUND_CLOSEST(rx_sample_dly_ns,
NSEC_PER_SEC /
dws->max_freq);
}
chip->tmode = SPI_TMOD_TR;
/*
* Update CR0 data each time the setup callback is invoked since
* the device parameters could have been changed, for instance, by
* the MMC SPI driver or something else.
*/
chip->cr0 = dw_spi_prepare_cr0(dws, spi);
return 0;
}
@ -423,7 +829,7 @@ static void spi_hw_init(struct device *dev, struct dw_spi *dws)
}
/* enable HW fixup for explicit CS deselect for Amazon's alpine chip */
if (dws->cs_override)
if (dws->caps & DW_SPI_CAP_CS_OVERRIDE)
dw_writel(dws, DW_SPI_CS_OVERRIDE, 0xF);
}
@ -440,19 +846,22 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
return -ENOMEM;
dws->master = master;
dws->type = SSI_MOTO_SPI;
dws->dma_addr = (dma_addr_t)(dws->paddr + DW_SPI_DR);
spin_lock_init(&dws->buf_lock);
spi_controller_set_devdata(master, dws);
/* Basic HW init */
spi_hw_init(dev, dws);
ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, dev_name(dev),
master);
if (ret < 0) {
if (ret < 0 && ret != -ENOTCONN) {
dev_err(dev, "can not get IRQ\n");
goto err_free_master;
}
dw_spi_init_mem_ops(dws);
master->use_gpio_descriptors = true;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
@ -460,20 +869,22 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
master->num_chipselect = dws->num_cs;
master->setup = dw_spi_setup;
master->cleanup = dw_spi_cleanup;
master->set_cs = dw_spi_set_cs;
if (dws->set_cs)
master->set_cs = dws->set_cs;
else
master->set_cs = dw_spi_set_cs;
master->transfer_one = dw_spi_transfer_one;
master->handle_err = dw_spi_handle_err;
master->mem_ops = &dws->mem_ops;
master->max_speed_hz = dws->max_freq;
master->dev.of_node = dev->of_node;
master->dev.fwnode = dev->fwnode;
master->flags = SPI_MASTER_GPIO_SS;
master->auto_runtime_pm = true;
if (dws->set_cs)
master->set_cs = dws->set_cs;
/* Basic HW init */
spi_hw_init(dev, dws);
/* Get default rx sample delay */
device_property_read_u32(dev, "rx-sample-delay-ns",
&dws->def_rx_sample_dly_ns);
if (dws->dma_ops && dws->dma_ops->dma_init) {
ret = dws->dma_ops->dma_init(dev, dws);

332
drivers/spi/spi-dw-dma.c
Просмотреть файл

@ -17,7 +17,6 @@
#include "spi-dw.h"
#define WAIT_RETRIES 5
#define RX_BUSY 0
#define RX_BURST_LEVEL 16
#define TX_BUSY 1
@ -49,6 +48,7 @@ static void dw_spi_dma_maxburst_init(struct dw_spi *dws)
max_burst = RX_BURST_LEVEL;
dws->rxburst = min(max_burst, def_burst);
dw_writel(dws, DW_SPI_DMARDLR, dws->rxburst - 1);
ret = dma_get_slave_caps(dws->txchan, &caps);
if (!ret && caps.max_burst)
@ -56,7 +56,36 @@ static void dw_spi_dma_maxburst_init(struct dw_spi *dws)
else
max_burst = TX_BURST_LEVEL;
/*
* Having a Rx DMA channel serviced with higher priority than a Tx DMA
* channel might not be enough to provide a well balanced DMA-based
* SPI transfer interface. There might still be moments when the Tx DMA
* channel is occasionally handled faster than the Rx DMA channel.
* That in its turn will eventually cause the SPI Rx FIFO overflow if
* SPI bus speed is high enough to fill the SPI Rx FIFO in before it's
* cleared by the Rx DMA channel. In order to fix the problem the Tx
* DMA activity is intentionally slowed down by limiting the SPI Tx
* FIFO depth with a value twice bigger than the Tx burst length.
*/
dws->txburst = min(max_burst, def_burst);
dw_writel(dws, DW_SPI_DMATDLR, dws->txburst);
}
static void dw_spi_dma_sg_burst_init(struct dw_spi *dws)
{
struct dma_slave_caps tx = {0}, rx = {0};
dma_get_slave_caps(dws->txchan, &tx);
dma_get_slave_caps(dws->rxchan, &rx);
if (tx.max_sg_burst > 0 && rx.max_sg_burst > 0)
dws->dma_sg_burst = min(tx.max_sg_burst, rx.max_sg_burst);
else if (tx.max_sg_burst > 0)
dws->dma_sg_burst = tx.max_sg_burst;
else if (rx.max_sg_burst > 0)
dws->dma_sg_burst = rx.max_sg_burst;
else
dws->dma_sg_burst = 0;
}
static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
@ -96,6 +125,8 @@ static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
dw_spi_dma_maxburst_init(dws);
dw_spi_dma_sg_burst_init(dws);
return 0;
free_rxchan:
@ -125,6 +156,8 @@ static int dw_spi_dma_init_generic(struct device *dev, struct dw_spi *dws)
dw_spi_dma_maxburst_init(dws);
dw_spi_dma_sg_burst_init(dws);
return 0;
}
@ -139,23 +172,14 @@ static void dw_spi_dma_exit(struct dw_spi *dws)
dmaengine_terminate_sync(dws->rxchan);
dma_release_channel(dws->rxchan);
}
dw_writel(dws, DW_SPI_DMACR, 0);
}
static irqreturn_t dw_spi_dma_transfer_handler(struct dw_spi *dws)
{
u16 irq_status = dw_readl(dws, DW_SPI_ISR);
dw_spi_check_status(dws, false);
if (!irq_status)
return IRQ_NONE;
dw_readl(dws, DW_SPI_ICR);
spi_reset_chip(dws);
dev_err(&dws->master->dev, "%s: FIFO overrun/underrun\n", __func__);
dws->master->cur_msg->status = -EIO;
complete(&dws->dma_completion);
return IRQ_HANDLED;
}
@ -177,12 +201,12 @@ static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes)
return DMA_SLAVE_BUSWIDTH_UNDEFINED;
}
static int dw_spi_dma_wait(struct dw_spi *dws, struct spi_transfer *xfer)
static int dw_spi_dma_wait(struct dw_spi *dws, unsigned int len, u32 speed)
{
unsigned long long ms;
ms = xfer->len * MSEC_PER_SEC * BITS_PER_BYTE;
do_div(ms, xfer->effective_speed_hz);
ms = len * MSEC_PER_SEC * BITS_PER_BYTE;
do_div(ms, speed);
ms += ms + 200;
if (ms > UINT_MAX)
@ -208,7 +232,7 @@ static inline bool dw_spi_dma_tx_busy(struct dw_spi *dws)
static int dw_spi_dma_wait_tx_done(struct dw_spi *dws,
struct spi_transfer *xfer)
{
int retry = WAIT_RETRIES;
int retry = SPI_WAIT_RETRIES;
struct spi_delay delay;
u32 nents;
@ -239,18 +263,12 @@ static void dw_spi_dma_tx_done(void *arg)
if (test_bit(RX_BUSY, &dws->dma_chan_busy))
return;
dw_writel(dws, DW_SPI_DMACR, 0);
complete(&dws->dma_completion);
}
static struct dma_async_tx_descriptor *
dw_spi_dma_prepare_tx(struct dw_spi *dws, struct spi_transfer *xfer)
static int dw_spi_dma_config_tx(struct dw_spi *dws)
{
struct dma_slave_config txconf;
struct dma_async_tx_descriptor *txdesc;
if (!xfer->tx_buf)
return NULL;
memset(&txconf, 0, sizeof(txconf));
txconf.direction = DMA_MEM_TO_DEV;
@ -260,20 +278,35 @@ dw_spi_dma_prepare_tx(struct dw_spi *dws, struct spi_transfer *xfer)
txconf.dst_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
txconf.device_fc = false;
dmaengine_slave_config(dws->txchan, &txconf);
return dmaengine_slave_config(dws->txchan, &txconf);
}
txdesc = dmaengine_prep_slave_sg(dws->txchan,
xfer->tx_sg.sgl,
xfer->tx_sg.nents,
DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
static int dw_spi_dma_submit_tx(struct dw_spi *dws, struct scatterlist *sgl,
unsigned int nents)
{
struct dma_async_tx_descriptor *txdesc;
dma_cookie_t cookie;
int ret;
txdesc = dmaengine_prep_slave_sg(dws->txchan, sgl, nents,
DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!txdesc)
return NULL;
return -ENOMEM;
txdesc->callback = dw_spi_dma_tx_done;
txdesc->callback_param = dws;
return txdesc;
cookie = dmaengine_submit(txdesc);
ret = dma_submit_error(cookie);
if (ret) {
dmaengine_terminate_sync(dws->txchan);
return ret;
}
set_bit(TX_BUSY, &dws->dma_chan_busy);
return 0;
}
static inline bool dw_spi_dma_rx_busy(struct dw_spi *dws)
@ -283,7 +316,7 @@ static inline bool dw_spi_dma_rx_busy(struct dw_spi *dws)
static int dw_spi_dma_wait_rx_done(struct dw_spi *dws)
{
int retry = WAIT_RETRIES;
int retry = SPI_WAIT_RETRIES;
struct spi_delay delay;
unsigned long ns, us;
u32 nents;
@ -331,18 +364,12 @@ static void dw_spi_dma_rx_done(void *arg)
if (test_bit(TX_BUSY, &dws->dma_chan_busy))
return;
dw_writel(dws, DW_SPI_DMACR, 0);
complete(&dws->dma_completion);
}
static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws,
struct spi_transfer *xfer)
static int dw_spi_dma_config_rx(struct dw_spi *dws)
{
struct dma_slave_config rxconf;
struct dma_async_tx_descriptor *rxdesc;
if (!xfer->rx_buf)
return NULL;
memset(&rxconf, 0, sizeof(rxconf));
rxconf.direction = DMA_DEV_TO_MEM;
@ -352,50 +379,64 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws,
rxconf.src_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
rxconf.device_fc = false;
dmaengine_slave_config(dws->rxchan, &rxconf);
return dmaengine_slave_config(dws->rxchan, &rxconf);
}
rxdesc = dmaengine_prep_slave_sg(dws->rxchan,
xfer->rx_sg.sgl,
xfer->rx_sg.nents,
DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
static int dw_spi_dma_submit_rx(struct dw_spi *dws, struct scatterlist *sgl,
unsigned int nents)
{
struct dma_async_tx_descriptor *rxdesc;
dma_cookie_t cookie;
int ret;
rxdesc = dmaengine_prep_slave_sg(dws->rxchan, sgl, nents,
DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!rxdesc)
return NULL;
return -ENOMEM;
rxdesc->callback = dw_spi_dma_rx_done;
rxdesc->callback_param = dws;
return rxdesc;
cookie = dmaengine_submit(rxdesc);
ret = dma_submit_error(cookie);
if (ret) {
dmaengine_terminate_sync(dws->rxchan);
return ret;
}
set_bit(RX_BUSY, &dws->dma_chan_busy);
return 0;
}
static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer)
{
u16 imr = 0, dma_ctrl = 0;
u16 imr, dma_ctrl;
int ret;
/*
* Having a Rx DMA channel serviced with higher priority than a Tx DMA
* channel might not be enough to provide a well balanced DMA-based
* SPI transfer interface. There might still be moments when the Tx DMA
* channel is occasionally handled faster than the Rx DMA channel.
* That in its turn will eventually cause the SPI Rx FIFO overflow if
* SPI bus speed is high enough to fill the SPI Rx FIFO in before it's
* cleared by the Rx DMA channel. In order to fix the problem the Tx
* DMA activity is intentionally slowed down by limiting the SPI Tx
* FIFO depth with a value twice bigger than the Tx burst length
* calculated earlier by the dw_spi_dma_maxburst_init() method.
*/
dw_writel(dws, DW_SPI_DMARDLR, dws->rxburst - 1);
dw_writel(dws, DW_SPI_DMATDLR, dws->txburst);
if (!xfer->tx_buf)
return -EINVAL;
if (xfer->tx_buf)
dma_ctrl |= SPI_DMA_TDMAE;
/* Setup DMA channels */
ret = dw_spi_dma_config_tx(dws);
if (ret)
return ret;
if (xfer->rx_buf) {
ret = dw_spi_dma_config_rx(dws);
if (ret)
return ret;
}
/* Set the DMA handshaking interface */
dma_ctrl = SPI_DMA_TDMAE;
if (xfer->rx_buf)
dma_ctrl |= SPI_DMA_RDMAE;
dw_writel(dws, DW_SPI_DMACR, dma_ctrl);
/* Set the interrupt mask */
if (xfer->tx_buf)
imr |= SPI_INT_TXOI;
imr = SPI_INT_TXOI;
if (xfer->rx_buf)
imr |= SPI_INT_RXUI | SPI_INT_RXOI;
spi_umask_intr(dws, imr);
@ -407,41 +448,166 @@ static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer)
return 0;
}
static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer)
static int dw_spi_dma_transfer_all(struct dw_spi *dws,
struct spi_transfer *xfer)
{
struct dma_async_tx_descriptor *txdesc, *rxdesc;
int ret;
/* Prepare the TX dma transfer */
txdesc = dw_spi_dma_prepare_tx(dws, xfer);
/* Submit the DMA Tx transfer */
ret = dw_spi_dma_submit_tx(dws, xfer->tx_sg.sgl, xfer->tx_sg.nents);
if (ret)
goto err_clear_dmac;
/* Prepare the RX dma transfer */
rxdesc = dw_spi_dma_prepare_rx(dws, xfer);
/* Submit the DMA Rx transfer if required */
if (xfer->rx_buf) {
ret = dw_spi_dma_submit_rx(dws, xfer->rx_sg.sgl,
xfer->rx_sg.nents);
if (ret)
goto err_clear_dmac;
/* rx must be started before tx due to spi instinct */
if (rxdesc) {
set_bit(RX_BUSY, &dws->dma_chan_busy);
dmaengine_submit(rxdesc);
/* rx must be started before tx due to spi instinct */
dma_async_issue_pending(dws->rxchan);
}
if (txdesc) {
set_bit(TX_BUSY, &dws->dma_chan_busy);
dmaengine_submit(txdesc);
dma_async_issue_pending(dws->txchan);
ret = dw_spi_dma_wait(dws, xfer->len, xfer->effective_speed_hz);
err_clear_dmac:
dw_writel(dws, DW_SPI_DMACR, 0);
return ret;
}
/*
* In case if at least one of the requested DMA channels doesn't support the
* hardware accelerated SG list entries traverse, the DMA driver will most
* likely work that around by performing the IRQ-based SG list entries
* resubmission. That might and will cause a problem if the DMA Tx channel is
* recharged and re-executed before the Rx DMA channel. Due to
* non-deterministic IRQ-handler execution latency the DMA Tx channel will
* start pushing data to the SPI bus before the Rx DMA channel is even
* reinitialized with the next inbound SG list entry. By doing so the DMA Tx
* channel will implicitly start filling the DW APB SSI Rx FIFO up, which while
* the DMA Rx channel being recharged and re-executed will eventually be
* overflown.
*
* In order to solve the problem we have to feed the DMA engine with SG list
* entries one-by-one. It shall keep the DW APB SSI Tx and Rx FIFOs
* synchronized and prevent the Rx FIFO overflow. Since in general the tx_sg
* and rx_sg lists may have different number of entries of different lengths
* (though total length should match) let's virtually split the SG-lists to the
* set of DMA transfers, which length is a minimum of the ordered SG-entries
* lengths. An ASCII-sketch of the implemented algo is following:
* xfer->len
* |___________|
* tx_sg list: |___|____|__|
* rx_sg list: |_|____|____|
* DMA transfers: |_|_|__|_|__|
*
* Note in order to have this workaround solving the denoted problem the DMA
* engine driver should properly initialize the max_sg_burst capability and set
* the DMA device max segment size parameter with maximum data block size the
* DMA engine supports.
*/
static int dw_spi_dma_transfer_one(struct dw_spi *dws,
struct spi_transfer *xfer)
{
struct scatterlist *tx_sg = NULL, *rx_sg = NULL, tx_tmp, rx_tmp;
unsigned int tx_len = 0, rx_len = 0;
unsigned int base, len;
int ret;
sg_init_table(&tx_tmp, 1);
sg_init_table(&rx_tmp, 1);
for (base = 0, len = 0; base < xfer->len; base += len) {
/* Fetch next Tx DMA data chunk */
if (!tx_len) {
tx_sg = !tx_sg ? &xfer->tx_sg.sgl[0] : sg_next(tx_sg);
sg_dma_address(&tx_tmp) = sg_dma_address(tx_sg);
tx_len = sg_dma_len(tx_sg);
}
/* Fetch next Rx DMA data chunk */
if (!rx_len) {
rx_sg = !rx_sg ? &xfer->rx_sg.sgl[0] : sg_next(rx_sg);
sg_dma_address(&rx_tmp) = sg_dma_address(rx_sg);
rx_len = sg_dma_len(rx_sg);
}
len = min(tx_len, rx_len);
sg_dma_len(&tx_tmp) = len;
sg_dma_len(&rx_tmp) = len;
/* Submit DMA Tx transfer */
ret = dw_spi_dma_submit_tx(dws, &tx_tmp, 1);
if (ret)
break;
/* Submit DMA Rx transfer */
ret = dw_spi_dma_submit_rx(dws, &rx_tmp, 1);
if (ret)
break;
/* Rx must be started before Tx due to SPI instinct */
dma_async_issue_pending(dws->rxchan);
dma_async_issue_pending(dws->txchan);
/*
* Here we only need to wait for the DMA transfer to be
* finished since SPI controller is kept enabled during the
* procedure this loop implements and there is no risk to lose
* data left in the Tx/Rx FIFOs.
*/
ret = dw_spi_dma_wait(dws, len, xfer->effective_speed_hz);
if (ret)
break;
reinit_completion(&dws->dma_completion);
sg_dma_address(&tx_tmp) += len;
sg_dma_address(&rx_tmp) += len;
tx_len -= len;
rx_len -= len;
}
ret = dw_spi_dma_wait(dws, xfer);
dw_writel(dws, DW_SPI_DMACR, 0);
return ret;
}
static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer)
{
unsigned int nents;
int ret;
nents = max(xfer->tx_sg.nents, xfer->rx_sg.nents);
/*
* Execute normal DMA-based transfer (which submits the Rx and Tx SG
* lists directly to the DMA engine at once) if either full hardware
* accelerated SG list traverse is supported by both channels, or the
* Tx-only SPI transfer is requested, or the DMA engine is capable to
* handle both SG lists on hardware accelerated basis.
*/
if (!dws->dma_sg_burst || !xfer->rx_buf || nents <= dws->dma_sg_burst)
ret = dw_spi_dma_transfer_all(dws, xfer);
else
ret = dw_spi_dma_transfer_one(dws, xfer);
if (ret)
return ret;
if (txdesc && dws->master->cur_msg->status == -EINPROGRESS) {
if (dws->master->cur_msg->status == -EINPROGRESS) {
ret = dw_spi_dma_wait_tx_done(dws, xfer);
if (ret)
return ret;
}
if (rxdesc && dws->master->cur_msg->status == -EINPROGRESS)
if (xfer->rx_buf && dws->master->cur_msg->status == -EINPROGRESS)
ret = dw_spi_dma_wait_rx_done(dws);
return ret;
@ -457,8 +623,6 @@ static void dw_spi_dma_stop(struct dw_spi *dws)
dmaengine_terminate_sync(dws->rxchan);
clear_bit(RX_BUSY, &dws->dma_chan_busy);
}
dw_writel(dws, DW_SPI_DMACR, 0);
}
static const struct dw_spi_dma_ops dw_spi_dma_mfld_ops = {

98
drivers/spi/spi-dw-mmio.c
Просмотреть файл

@ -45,16 +45,12 @@ struct dw_spi_mmio {
#define MSCC_SPI_MST_SW_MODE_SW_PIN_CTRL_MODE BIT(13)
#define MSCC_SPI_MST_SW_MODE_SW_SPI_CS(x) (x << 5)
/*
* For Keem Bay, CTRLR0[31] is used to select controller mode.
* 0: SSI is slave
* 1: SSI is master
*/
#define KEEMBAY_CTRLR0_SSIC_IS_MST BIT(31)
#define SPARX5_FORCE_ENA 0xa4
#define SPARX5_FORCE_VAL 0xa8
struct dw_spi_mscc {
struct regmap *syscon;
void __iomem *spi_mst;
void __iomem *spi_mst; /* Not sparx5 */
};
/*
@ -114,9 +110,6 @@ static int dw_spi_mscc_init(struct platform_device *pdev,
dwsmmio->dws.set_cs = dw_spi_mscc_set_cs;
dwsmmio->priv = dwsmscc;
/* Register hook to configure CTRLR0 */
dwsmmio->dws.update_cr0 = dw_spi_update_cr0;
return 0;
}
@ -134,13 +127,71 @@ static int dw_spi_mscc_jaguar2_init(struct platform_device *pdev,
JAGUAR2_IF_SI_OWNER_OFFSET);
}
/*
* The Designware SPI controller (referred to as master in the
* documentation) automatically deasserts chip select when the tx fifo
* is empty. The chip selects then needs to be driven by a CS override
* register. enable is an active low signal.
*/
static void dw_spi_sparx5_set_cs(struct spi_device *spi, bool enable)
{
struct dw_spi *dws = spi_master_get_devdata(spi->master);
struct dw_spi_mmio *dwsmmio = container_of(dws, struct dw_spi_mmio, dws);
struct dw_spi_mscc *dwsmscc = dwsmmio->priv;
u8 cs = spi->chip_select;
if (!enable) {
/* CS override drive enable */
regmap_write(dwsmscc->syscon, SPARX5_FORCE_ENA, 1);
/* Now set CSx enabled */
regmap_write(dwsmscc->syscon, SPARX5_FORCE_VAL, ~BIT(cs));
/* Allow settle */
usleep_range(1, 5);
} else {
/* CS value */
regmap_write(dwsmscc->syscon, SPARX5_FORCE_VAL, ~0);
/* Allow settle */
usleep_range(1, 5);
/* CS override drive disable */
regmap_write(dwsmscc->syscon, SPARX5_FORCE_ENA, 0);
}
dw_spi_set_cs(spi, enable);
}
static int dw_spi_mscc_sparx5_init(struct platform_device *pdev,
struct dw_spi_mmio *dwsmmio)
{
const char *syscon_name = "microchip,sparx5-cpu-syscon";
struct device *dev = &pdev->dev;
struct dw_spi_mscc *dwsmscc;
if (!IS_ENABLED(CONFIG_SPI_MUX)) {
dev_err(dev, "This driver needs CONFIG_SPI_MUX\n");
return -EOPNOTSUPP;
}
dwsmscc = devm_kzalloc(dev, sizeof(*dwsmscc), GFP_KERNEL);
if (!dwsmscc)
return -ENOMEM;
dwsmscc->syscon =
syscon_regmap_lookup_by_compatible(syscon_name);
if (IS_ERR(dwsmscc->syscon)) {
dev_err(dev, "No syscon map %s\n", syscon_name);
return PTR_ERR(dwsmscc->syscon);
}
dwsmmio->dws.set_cs = dw_spi_sparx5_set_cs;
dwsmmio->priv = dwsmscc;
return 0;
}
static int dw_spi_alpine_init(struct platform_device *pdev,
struct dw_spi_mmio *dwsmmio)
{
dwsmmio->dws.cs_override = 1;
/* Register hook to configure CTRLR0 */
dwsmmio->dws.update_cr0 = dw_spi_update_cr0;
dwsmmio->dws.caps = DW_SPI_CAP_CS_OVERRIDE;
return 0;
}
@ -148,9 +199,6 @@ static int dw_spi_alpine_init(struct platform_device *pdev,
static int dw_spi_dw_apb_init(struct platform_device *pdev,
struct dw_spi_mmio *dwsmmio)
{
/* Register hook to configure CTRLR0 */
dwsmmio->dws.update_cr0 = dw_spi_update_cr0;
dw_spi_dma_setup_generic(&dwsmmio->dws);
return 0;
@ -159,28 +207,17 @@ static int dw_spi_dw_apb_init(struct platform_device *pdev,
static int dw_spi_dwc_ssi_init(struct platform_device *pdev,
struct dw_spi_mmio *dwsmmio)
{
/* Register hook to configure CTRLR0 */
dwsmmio->dws.update_cr0 = dw_spi_update_cr0_v1_01a;
dwsmmio->dws.caps = DW_SPI_CAP_DWC_SSI;
dw_spi_dma_setup_generic(&dwsmmio->dws);
return 0;
}
static u32 dw_spi_update_cr0_keembay(struct spi_controller *master,
struct spi_device *spi,
struct spi_transfer *transfer)
{
u32 cr0 = dw_spi_update_cr0_v1_01a(master, spi, transfer);
return cr0 | KEEMBAY_CTRLR0_SSIC_IS_MST;
}
static int dw_spi_keembay_init(struct platform_device *pdev,
struct dw_spi_mmio *dwsmmio)
{
/* Register hook to configure CTRLR0 */
dwsmmio->dws.update_cr0 = dw_spi_update_cr0_keembay;
dwsmmio->dws.caps = DW_SPI_CAP_KEEMBAY_MST | DW_SPI_CAP_DWC_SSI;
return 0;
}
@ -297,6 +334,7 @@ static const struct of_device_id dw_spi_mmio_of_match[] = {
{ .compatible = "renesas,rzn1-spi", .data = dw_spi_dw_apb_init},
{ .compatible = "snps,dwc-ssi-1.01a", .data = dw_spi_dwc_ssi_init},
{ .compatible = "intel,keembay-ssi", .data = dw_spi_keembay_init},
{ .compatible = "microchip,sparx5-spi", dw_spi_mscc_sparx5_init},
{ /* end of table */}
};
MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match);

22
drivers/spi/spi-dw-pci.c
Просмотреть файл

@ -48,9 +48,6 @@ static int spi_mid_init(struct dw_spi *dws)
iounmap(clk_reg);
/* Register hook to configure CTRLR0 */
dws->update_cr0 = dw_spi_update_cr0;
dw_spi_dma_setup_mfld(dws);
return 0;
@ -58,9 +55,6 @@ static int spi_mid_init(struct dw_spi *dws)
static int spi_generic_init(struct dw_spi *dws)
{
/* Register hook to configure CTRLR0 */
dws->update_cr0 = dw_spi_update_cr0;
dw_spi_dma_setup_generic(dws);
return 0;
@ -127,18 +121,16 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (desc->setup) {
ret = desc->setup(dws);
if (ret)
return ret;
goto err_free_irq_vectors;
}
} else {
pci_free_irq_vectors(pdev);
return -ENODEV;
ret = -ENODEV;
goto err_free_irq_vectors;
}
ret = dw_spi_add_host(&pdev->dev, dws);
if (ret) {
pci_free_irq_vectors(pdev);
return ret;
}
if (ret)
goto err_free_irq_vectors;
/* PCI hook and SPI hook use the same drv data */
pci_set_drvdata(pdev, dws);
@ -152,6 +144,10 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pm_runtime_allow(&pdev->dev);
return 0;
err_free_irq_vectors:
pci_free_irq_vectors(pdev);
return ret;
}
static void spi_pci_remove(struct pci_dev *pdev)

89
drivers/spi/spi-dw.h
Просмотреть файл

@ -2,11 +2,13 @@
#ifndef DW_SPI_HEADER_H
#define DW_SPI_HEADER_H
#include <linux/bits.h>
#include <linux/completion.h>
#include <linux/debugfs.h>
#include <linux/irqreturn.h>
#include <linux/io.h>
#include <linux/scatterlist.h>
#include <linux/spi/spi-mem.h>
/* Register offsets */
#define DW_SPI_CTRLR0 0x00
@ -34,6 +36,7 @@
#define DW_SPI_IDR 0x58
#define DW_SPI_VERSION 0x5c
#define DW_SPI_DR 0x60
#define DW_SPI_RX_SAMPLE_DLY 0xf0
#define DW_SPI_CS_OVERRIDE 0xf4
/* Bit fields in CTRLR0 */
@ -69,6 +72,16 @@
#define DWC_SSI_CTRLR0_FRF_OFFSET 6
#define DWC_SSI_CTRLR0_DFS_OFFSET 0
/*
* For Keem Bay, CTRLR0[31] is used to select controller mode.
* 0: SSI is slave
* 1: SSI is master
*/
#define DWC_SSI_CTRLR0_KEEMBAY_MST BIT(31)
/* Bit fields in CTRLR1 */
#define SPI_NDF_MASK GENMASK(15, 0)
/* Bit fields in SR, 7 bits */
#define SR_MASK 0x7f /* cover 7 bits */
#define SR_BUSY (1 << 0)
@ -91,8 +104,12 @@
#define SPI_DMA_RDMAE (1 << 0)
#define SPI_DMA_TDMAE (1 << 1)
/* TX RX interrupt level threshold, max can be 256 */
#define SPI_INT_THRESHOLD 32
#define SPI_WAIT_RETRIES 5
#define SPI_BUF_SIZE \
(sizeof_field(struct spi_mem_op, cmd.opcode) + \
sizeof_field(struct spi_mem_op, addr.val) + 256)
#define SPI_GET_BYTE(_val, _idx) \
((_val) >> (BITS_PER_BYTE * (_idx)) & 0xff)
enum dw_ssi_type {
SSI_MOTO_SPI = 0,
@ -100,6 +117,19 @@ enum dw_ssi_type {
SSI_NS_MICROWIRE,
};
/* DW SPI capabilities */
#define DW_SPI_CAP_CS_OVERRIDE BIT(0)
#define DW_SPI_CAP_KEEMBAY_MST BIT(1)
#define DW_SPI_CAP_DWC_SSI BIT(2)
/* Slave spi_transfer/spi_mem_op related */
struct dw_spi_cfg {
u8 tmode;
u8 dfs;
u32 ndf;
u32 freq;
};
struct dw_spi;
struct dw_spi_dma_ops {
int (*dma_init)(struct device *dev, struct dw_spi *dws);
@ -113,39 +143,43 @@ struct dw_spi_dma_ops {
struct dw_spi {
struct spi_controller *master;
enum dw_ssi_type type;
void __iomem *regs;
unsigned long paddr;
int irq;
u32 fifo_len; /* depth of the FIFO buffer */
u32 max_mem_freq; /* max mem-ops bus freq */
u32 max_freq; /* max bus freq supported */
int cs_override;
u32 caps; /* DW SPI capabilities */
u32 reg_io_width; /* DR I/O width in bytes */
u16 bus_num;
u16 num_cs; /* supported slave numbers */
void (*set_cs)(struct spi_device *spi, bool enable);
u32 (*update_cr0)(struct spi_controller *master, struct spi_device *spi,
struct spi_transfer *transfer);
/* Current message transfer state info */
size_t len;
void *tx;
void *tx_end;
spinlock_t buf_lock;
unsigned int tx_len;
void *rx;
void *rx_end;
unsigned int rx_len;
u8 buf[SPI_BUF_SIZE];
int dma_mapped;
u8 n_bytes; /* current is a 1/2 bytes op */
irqreturn_t (*transfer_handler)(struct dw_spi *dws);
u32 current_freq; /* frequency in hz */
u32 cur_rx_sample_dly;
u32 def_rx_sample_dly_ns;
/* Custom memory operations */
struct spi_controller_mem_ops mem_ops;
/* DMA info */
struct dma_chan *txchan;
u32 txburst;
struct dma_chan *rxchan;
u32 rxburst;
u32 dma_sg_burst;
unsigned long dma_chan_busy;
dma_addr_t dma_addr; /* phy address of the Data register */
const struct dw_spi_dma_ops *dma_ops;
@ -162,29 +196,19 @@ static inline u32 dw_readl(struct dw_spi *dws, u32 offset)
return __raw_readl(dws->regs + offset);
}
static inline u16 dw_readw(struct dw_spi *dws, u32 offset)
{
return __raw_readw(dws->regs + offset);
}
static inline void dw_writel(struct dw_spi *dws, u32 offset, u32 val)
{
__raw_writel(val, dws->regs + offset);
}
static inline void dw_writew(struct dw_spi *dws, u32 offset, u16 val)
{
__raw_writew(val, dws->regs + offset);
}
static inline u32 dw_read_io_reg(struct dw_spi *dws, u32 offset)
{
switch (dws->reg_io_width) {
case 2:
return dw_readw(dws, offset);
return readw_relaxed(dws->regs + offset);
case 4:
default:
return dw_readl(dws, offset);
return readl_relaxed(dws->regs + offset);
}
}
@ -192,11 +216,11 @@ static inline void dw_write_io_reg(struct dw_spi *dws, u32 offset, u32 val)
{
switch (dws->reg_io_width) {
case 2:
dw_writew(dws, offset, val);
writew_relaxed(val, dws->regs + offset);
break;
case 4:
default:
dw_writel(dws, offset, val);
writel_relaxed(val, dws->regs + offset);
break;
}
}
@ -230,14 +254,16 @@ static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
}
/*
* This does disable the SPI controller, interrupts, and re-enable the
* controller back. Transmit and receive FIFO buffers are cleared when the
* device is disabled.
* This disables the SPI controller, interrupts, clears the interrupts status
* and CS, then re-enables the controller back. Transmit and receive FIFO
* buffers are cleared when the device is disabled.
*/
static inline void spi_reset_chip(struct dw_spi *dws)
{
spi_enable_chip(dws, 0);
spi_mask_intr(dws, 0xff);
dw_readl(dws, DW_SPI_ICR);
dw_writel(dws, DW_SPI_SER, 0);
spi_enable_chip(dws, 1);
}
@ -248,16 +274,13 @@ static inline void spi_shutdown_chip(struct dw_spi *dws)
}
extern void dw_spi_set_cs(struct spi_device *spi, bool enable);
extern void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi,
struct dw_spi_cfg *cfg);
extern int dw_spi_check_status(struct dw_spi *dws, bool raw);
extern int dw_spi_add_host(struct device *dev, struct dw_spi *dws);
extern void dw_spi_remove_host(struct dw_spi *dws);
extern int dw_spi_suspend_host(struct dw_spi *dws);
extern int dw_spi_resume_host(struct dw_spi *dws);
extern u32 dw_spi_update_cr0(struct spi_controller *master,
struct spi_device *spi,
struct spi_transfer *transfer);
extern u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master,
struct spi_device *spi,
struct spi_transfer *transfer);
#ifdef CONFIG_SPI_DW_DMA

139
drivers/spi/spi-fsi.c
Просмотреть файл

@ -12,6 +12,7 @@
#define FSI_ENGID_SPI 0x23
#define FSI_MBOX_ROOT_CTRL_8 0x2860
#define FSI_MBOX_ROOT_CTRL_8_SPI_MUX 0xf0000000
#define FSI2SPI_DATA0 0x00
#define FSI2SPI_DATA1 0x04
@ -24,11 +25,16 @@
#define SPI_FSI_BASE 0x70000
#define SPI_FSI_INIT_TIMEOUT_MS 1000
#define SPI_FSI_MAX_TRANSFER_SIZE 2048
#define SPI_FSI_MAX_XFR_SIZE 2048
#define SPI_FSI_MAX_XFR_SIZE_RESTRICTED 32
#define SPI_FSI_ERROR 0x0
#define SPI_FSI_COUNTER_CFG 0x1
#define SPI_FSI_COUNTER_CFG_LOOPS(x) (((u64)(x) & 0xffULL) << 32)
#define SPI_FSI_COUNTER_CFG_N2_RX BIT_ULL(8)
#define SPI_FSI_COUNTER_CFG_N2_TX BIT_ULL(9)
#define SPI_FSI_COUNTER_CFG_N2_IMPLICIT BIT_ULL(10)
#define SPI_FSI_COUNTER_CFG_N2_RELOAD BIT_ULL(11)
#define SPI_FSI_CFG1 0x2
#define SPI_FSI_CLOCK_CFG 0x3
#define SPI_FSI_CLOCK_CFG_MM_ENABLE BIT_ULL(32)
@ -61,7 +67,7 @@
#define SPI_FSI_STATUS_RDR_OVERRUN BIT_ULL(62)
#define SPI_FSI_STATUS_RDR_FULL BIT_ULL(63)
#define SPI_FSI_STATUS_ANY_ERROR \
(SPI_FSI_STATUS_ERROR | SPI_FSI_STATUS_TDR_UNDERRUN | \
(SPI_FSI_STATUS_ERROR | \
SPI_FSI_STATUS_TDR_OVERRUN | SPI_FSI_STATUS_RDR_UNDERRUN | \
SPI_FSI_STATUS_RDR_OVERRUN)
#define SPI_FSI_PORT_CTRL 0x9
@ -70,6 +76,8 @@ struct fsi_spi {
struct device *dev; /* SPI controller device */
struct fsi_device *fsi; /* FSI2SPI CFAM engine device */
u32 base;
size_t max_xfr_size;
bool restricted;
};
struct fsi_spi_sequence {
@ -77,6 +85,26 @@ struct fsi_spi_sequence {
u64 data;
};
static int fsi_spi_check_mux(struct fsi_device *fsi, struct device *dev)
{
int rc;
u32 root_ctrl_8;
__be32 root_ctrl_8_be;
rc = fsi_slave_read(fsi->slave, FSI_MBOX_ROOT_CTRL_8, &root_ctrl_8_be,
sizeof(root_ctrl_8_be));
if (rc)
return rc;
root_ctrl_8 = be32_to_cpu(root_ctrl_8_be);
dev_dbg(dev, "Root control register 8: %08x\n", root_ctrl_8);
if ((root_ctrl_8 & FSI_MBOX_ROOT_CTRL_8_SPI_MUX) ==
FSI_MBOX_ROOT_CTRL_8_SPI_MUX)
return 0;
return -ENOLINK;
}
static int fsi_spi_check_status(struct fsi_spi *ctx)
{
int rc;
@ -205,8 +233,12 @@ static int fsi_spi_reset(struct fsi_spi *ctx)
if (rc)
return rc;
return fsi_spi_write_reg(ctx, SPI_FSI_CLOCK_CFG,
SPI_FSI_CLOCK_CFG_RESET2);
rc = fsi_spi_write_reg(ctx, SPI_FSI_CLOCK_CFG,
SPI_FSI_CLOCK_CFG_RESET2);
if (rc)
return rc;
return fsi_spi_write_reg(ctx, SPI_FSI_STATUS, 0ULL);
}
static int fsi_spi_sequence_add(struct fsi_spi_sequence *seq, u8 val)
@ -214,8 +246,8 @@ static int fsi_spi_sequence_add(struct fsi_spi_sequence *seq, u8 val)
/*
* Add the next byte of instruction to the 8-byte sequence register.
* Then decrement the counter so that the next instruction will go in
* the right place. Return the number of "slots" left in the sequence
* register.
* the right place. Return the index of the slot we just filled in the
* sequence register.
*/
seq->data |= (u64)val << seq->bit;
seq->bit -= 8;
@ -233,40 +265,71 @@ static int fsi_spi_sequence_transfer(struct fsi_spi *ctx,
struct fsi_spi_sequence *seq,
struct spi_transfer *transfer)
{
bool docfg = false;
int loops;
int idx;
int rc;
u8 val = 0;
u8 len = min(transfer->len, 8U);
u8 rem = transfer->len % len;
u64 cfg = 0ULL;
loops = transfer->len / len;
if (transfer->tx_buf) {
idx = fsi_spi_sequence_add(seq,
SPI_FSI_SEQUENCE_SHIFT_OUT(len));
val = SPI_FSI_SEQUENCE_SHIFT_OUT(len);
idx = fsi_spi_sequence_add(seq, val);
if (rem)
rem = SPI_FSI_SEQUENCE_SHIFT_OUT(rem);
} else if (transfer->rx_buf) {
idx = fsi_spi_sequence_add(seq,
SPI_FSI_SEQUENCE_SHIFT_IN(len));
val = SPI_FSI_SEQUENCE_SHIFT_IN(len);
idx = fsi_spi_sequence_add(seq, val);
if (rem)
rem = SPI_FSI_SEQUENCE_SHIFT_IN(rem);
} else {
return -EINVAL;
}
if (ctx->restricted) {
const int eidx = rem ? 5 : 6;
while (loops > 1 && idx <= eidx) {
idx = fsi_spi_sequence_add(seq, val);
loops--;
docfg = true;
}
if (loops > 1) {
dev_warn(ctx->dev, "No sequencer slots; aborting.\n");
return -EINVAL;
}
}
if (loops > 1) {
fsi_spi_sequence_add(seq, SPI_FSI_SEQUENCE_BRANCH(idx));
docfg = true;
}
if (rem)
fsi_spi_sequence_add(seq, rem);
if (docfg) {
cfg = SPI_FSI_COUNTER_CFG_LOOPS(loops - 1);
if (transfer->rx_buf)
cfg |= SPI_FSI_COUNTER_CFG_N2_RX |
SPI_FSI_COUNTER_CFG_N2_TX |
SPI_FSI_COUNTER_CFG_N2_IMPLICIT |
SPI_FSI_COUNTER_CFG_N2_RELOAD;
rc = fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG,
SPI_FSI_COUNTER_CFG_LOOPS(loops - 1));
rc = fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG, cfg);
if (rc)
return rc;
} else {
fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG, 0ULL);
}
if (rem)
fsi_spi_sequence_add(seq, rem);
return 0;
}
@ -275,6 +338,7 @@ static int fsi_spi_transfer_data(struct fsi_spi *ctx,
{
int rc = 0;
u64 status = 0ULL;
u64 cfg = 0ULL;
if (transfer->tx_buf) {
int nb;
@ -312,6 +376,16 @@ static int fsi_spi_transfer_data(struct fsi_spi *ctx,
u64 in = 0ULL;
u8 *rx = transfer->rx_buf;
rc = fsi_spi_read_reg(ctx, SPI_FSI_COUNTER_CFG, &cfg);
if (rc)
return rc;
if (cfg & SPI_FSI_COUNTER_CFG_N2_IMPLICIT) {
rc = fsi_spi_write_reg(ctx, SPI_FSI_DATA_TX, 0);
if (rc)
return rc;
}
while (transfer->len > recv) {
do {
rc = fsi_spi_read_reg(ctx, SPI_FSI_STATUS,
@ -350,7 +424,7 @@ static int fsi_spi_transfer_init(struct fsi_spi *ctx)
u64 status = 0ULL;
u64 wanted_clock_cfg = SPI_FSI_CLOCK_CFG_ECC_DISABLE |
SPI_FSI_CLOCK_CFG_SCK_NO_DEL |
FIELD_PREP(SPI_FSI_CLOCK_CFG_SCK_DIV, 4);
FIELD_PREP(SPI_FSI_CLOCK_CFG_SCK_DIV, 19);
end = jiffies + msecs_to_jiffies(SPI_FSI_INIT_TIMEOUT_MS);
do {
@ -396,18 +470,22 @@ static int fsi_spi_transfer_init(struct fsi_spi *ctx)
static int fsi_spi_transfer_one_message(struct spi_controller *ctlr,
struct spi_message *mesg)
{
int rc = 0;
int rc;
u8 seq_slave = SPI_FSI_SEQUENCE_SEL_SLAVE(mesg->spi->chip_select + 1);
struct spi_transfer *transfer;
struct fsi_spi *ctx = spi_controller_get_devdata(ctlr);
rc = fsi_spi_check_mux(ctx->fsi, ctx->dev);
if (rc)
return rc;
list_for_each_entry(transfer, &mesg->transfers, transfer_list) {
struct fsi_spi_sequence seq;
struct spi_transfer *next = NULL;
/* Sequencer must do shift out (tx) first. */
if (!transfer->tx_buf ||
transfer->len > SPI_FSI_MAX_TRANSFER_SIZE) {
transfer->len > (ctx->max_xfr_size + 8)) {
rc = -EINVAL;
goto error;
}
@ -431,7 +509,7 @@ static int fsi_spi_transfer_one_message(struct spi_controller *ctlr,
/* Sequencer can only do shift in (rx) after tx. */
if (next->rx_buf) {
if (next->len > SPI_FSI_MAX_TRANSFER_SIZE) {
if (next->len > ctx->max_xfr_size) {
rc = -EINVAL;
goto error;
}
@ -476,30 +554,21 @@ error:
static size_t fsi_spi_max_transfer_size(struct spi_device *spi)
{
return SPI_FSI_MAX_TRANSFER_SIZE;
struct fsi_spi *ctx = spi_controller_get_devdata(spi->controller);
return ctx->max_xfr_size;
}
static int fsi_spi_probe(struct device *dev)
{
int rc;
u32 root_ctrl_8;
struct device_node *np;
int num_controllers_registered = 0;
struct fsi_device *fsi = to_fsi_dev(dev);
/*
* Check the SPI mux before attempting to probe. If the mux isn't set
* then the SPI controllers can't access their slave devices.
*/
rc = fsi_slave_read(fsi->slave, FSI_MBOX_ROOT_CTRL_8, &root_ctrl_8,
sizeof(root_ctrl_8));
rc = fsi_spi_check_mux(fsi, dev);
if (rc)
return rc;
if (!root_ctrl_8) {
dev_dbg(dev, "SPI mux not set, aborting probe.\n");
return -ENODEV;
}
for_each_available_child_of_node(dev->of_node, np) {
u32 base;
@ -524,6 +593,14 @@ static int fsi_spi_probe(struct device *dev)
ctx->fsi = fsi;
ctx->base = base + SPI_FSI_BASE;
if (of_device_is_compatible(np, "ibm,fsi2spi-restricted")) {
ctx->restricted = true;
ctx->max_xfr_size = SPI_FSI_MAX_XFR_SIZE_RESTRICTED;
} else {
ctx->restricted = false;
ctx->max_xfr_size = SPI_FSI_MAX_XFR_SIZE;
}
rc = devm_spi_register_controller(dev, ctlr);
if (rc)
spi_controller_put(ctlr);

58
drivers/spi/spi-fsl-dspi.c
Просмотреть файл

@ -53,7 +53,6 @@
#define SPI_SR 0x2c
#define SPI_SR_TCFQF BIT(31)
#define SPI_SR_EOQF BIT(28)
#define SPI_SR_TFUF BIT(27)
#define SPI_SR_TFFF BIT(25)
#define SPI_SR_CMDTCF BIT(23)
@ -62,7 +61,7 @@
#define SPI_SR_TFIWF BIT(18)
#define SPI_SR_RFDF BIT(17)
#define SPI_SR_CMDFFF BIT(16)
#define SPI_SR_CLEAR (SPI_SR_TCFQF | SPI_SR_EOQF | \
#define SPI_SR_CLEAR (SPI_SR_TCFQF | \
SPI_SR_TFUF | SPI_SR_TFFF | \
SPI_SR_CMDTCF | SPI_SR_SPEF | \
SPI_SR_RFOF | SPI_SR_TFIWF | \
@ -75,7 +74,6 @@
#define SPI_RSER 0x30
#define SPI_RSER_TCFQE BIT(31)
#define SPI_RSER_EOQFE BIT(28)
#define SPI_RSER_CMDTCFE BIT(23)
#define SPI_PUSHR 0x34
@ -114,7 +112,6 @@ struct chip_data {
};
enum dspi_trans_mode {
DSPI_EOQ_MODE = 0,
DSPI_XSPI_MODE,
DSPI_DMA_MODE,
};
@ -189,7 +186,7 @@ static const struct fsl_dspi_devtype_data devtype_data[] = {
.fifo_size = 4,
},
[MCF5441X] = {
.trans_mode = DSPI_EOQ_MODE,
.trans_mode = DSPI_DMA_MODE,
.max_clock_factor = 8,
.fifo_size = 16,
},
@ -671,11 +668,6 @@ static void ns_delay_scale(char *psc, char *sc, int delay_ns,
}
}
static void dspi_pushr_write(struct fsl_dspi *dspi)
{
regmap_write(dspi->regmap, SPI_PUSHR, dspi_pop_tx_pushr(dspi));
}
static void dspi_pushr_cmd_write(struct fsl_dspi *dspi, u16 cmd)
{
/*
@ -735,21 +727,6 @@ static void dspi_xspi_fifo_write(struct fsl_dspi *dspi, int num_words)
}
}
static void dspi_eoq_fifo_write(struct fsl_dspi *dspi, int num_words)
{
u16 xfer_cmd = dspi->tx_cmd;
/* Fill TX FIFO with as many transfers as possible */
while (num_words--) {
dspi->tx_cmd = xfer_cmd;
/* Request EOQF for last transfer in FIFO */
if (num_words == 0)
dspi->tx_cmd |= SPI_PUSHR_CMD_EOQ;
/* Write combined TX FIFO and CMD FIFO entry */
dspi_pushr_write(dspi);
}
}
static u32 dspi_popr_read(struct fsl_dspi *dspi)
{
u32 rxdata = 0;
@ -818,7 +795,7 @@ no_accel:
dspi->oper_word_size = DIV_ROUND_UP(dspi->oper_bits_per_word, 8);
/*
* Update CTAR here (code is common for EOQ, XSPI and DMA modes).
* Update CTAR here (code is common for XSPI and DMA modes).
* We will update CTARE in the portion specific to XSPI, when we
* also know the preload value (DTCP).
*/
@ -862,10 +839,7 @@ static void dspi_fifo_write(struct fsl_dspi *dspi)
spi_take_timestamp_pre(dspi->ctlr, xfer, dspi->progress, !dspi->irq);
if (dspi->devtype_data->trans_mode == DSPI_EOQ_MODE)
dspi_eoq_fifo_write(dspi, num_words);
else
dspi_xspi_fifo_write(dspi, num_words);
dspi_xspi_fifo_write(dspi, num_words);
/*
* Everything after this point is in a potential race with the next
* interrupt, so we must never use dspi->words_in_flight again since it
@ -898,7 +872,7 @@ static int dspi_poll(struct fsl_dspi *dspi)
regmap_read(dspi->regmap, SPI_SR, &spi_sr);
regmap_write(dspi->regmap, SPI_SR, spi_sr);
if (spi_sr & (SPI_SR_EOQF | SPI_SR_CMDTCF))
if (spi_sr & SPI_SR_CMDTCF)
break;
} while (--tries);
@ -916,7 +890,7 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id)
regmap_read(dspi->regmap, SPI_SR, &spi_sr);
regmap_write(dspi->regmap, SPI_SR, spi_sr);
if (!(spi_sr & (SPI_SR_EOQF | SPI_SR_CMDTCF)))
if (!(spi_sr & SPI_SR_CMDTCF))
return IRQ_NONE;
if (dspi_rxtx(dspi) == 0)
@ -1204,9 +1178,6 @@ static int dspi_init(struct fsl_dspi *dspi)
regmap_write(dspi->regmap, SPI_SR, SPI_SR_CLEAR);
switch (dspi->devtype_data->trans_mode) {
case DSPI_EOQ_MODE:
regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_EOQFE);
break;
case DSPI_XSPI_MODE:
regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_CMDTCFE);
break;
@ -1245,22 +1216,6 @@ static int dspi_slave_abort(struct spi_master *master)
return 0;
}
/*
* EOQ mode will inevitably deassert its PCS signal on last word in a queue
* (hardware limitation), so we need to inform the spi_device that larger
* buffers than the FIFO size are going to have the chip select randomly
* toggling, so it has a chance to adapt its message sizes.
*/
static size_t dspi_max_message_size(struct spi_device *spi)
{
struct fsl_dspi *dspi = spi_controller_get_devdata(spi->controller);
if (dspi->devtype_data->trans_mode == DSPI_EOQ_MODE)
return dspi->devtype_data->fifo_size;
return SIZE_MAX;
}
static int dspi_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@ -1289,7 +1244,6 @@ static int dspi_probe(struct platform_device *pdev)
ctlr->setup = dspi_setup;
ctlr->transfer_one_message = dspi_transfer_one_message;
ctlr->max_message_size = dspi_max_message_size;
ctlr->dev.of_node = pdev->dev.of_node;
ctlr->cleanup = dspi_cleanup;

2
drivers/spi/spi-fsl-espi.c
Просмотреть файл

@ -731,7 +731,7 @@ static int fsl_espi_probe(struct device *dev, struct resource *mem,
if (ret < 0)
goto err_pm;
dev_info(dev, "at 0x%p (irq = %u)\n", espi->reg_base, irq);
dev_info(dev, "irq = %u\n", irq);
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);

6
drivers/spi/spi-fsl-lpspi.c
Просмотреть файл

@ -944,8 +944,7 @@ static int fsl_lpspi_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int fsl_lpspi_suspend(struct device *dev)
static int __maybe_unused fsl_lpspi_suspend(struct device *dev)
{
int ret;
@ -954,7 +953,7 @@ static int fsl_lpspi_suspend(struct device *dev)
return ret;
}
static int fsl_lpspi_resume(struct device *dev)
static int __maybe_unused fsl_lpspi_resume(struct device *dev)
{
int ret;
@ -968,7 +967,6 @@ static int fsl_lpspi_resume(struct device *dev)
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static const struct dev_pm_ops fsl_lpspi_pm_ops = {
SET_RUNTIME_PM_OPS(fsl_lpspi_runtime_suspend,

204
drivers/spi/spi-geni-qcom.c
Просмотреть файл

@ -290,6 +290,7 @@ static int spi_geni_init(struct spi_geni_master *mas)
{
struct geni_se *se = &mas->se;
unsigned int proto, major, minor, ver;
u32 spi_tx_cfg;
pm_runtime_get_sync(mas->dev);
@ -308,7 +309,7 @@ static int spi_geni_init(struct spi_geni_master *mas)
* Hardware programming guide suggests to configure
* RX FIFO RFR level to fifo_depth-2.
*/
geni_se_init(se, mas->tx_fifo_depth / 2, mas->tx_fifo_depth - 2);
geni_se_init(se, mas->tx_fifo_depth - 3, mas->tx_fifo_depth - 2);
/* Transmit an entire FIFO worth of data per IRQ */
mas->tx_wm = 1;
ver = geni_se_get_qup_hw_version(se);
@ -322,99 +323,13 @@ static int spi_geni_init(struct spi_geni_master *mas)
geni_se_select_mode(se, GENI_SE_FIFO);
pm_runtime_put(mas->dev);
return 0;
}
static void setup_fifo_xfer(struct spi_transfer *xfer,
struct spi_geni_master *mas,
u16 mode, struct spi_master *spi)
{
u32 m_cmd = 0;
u32 spi_tx_cfg, len;
struct geni_se *se = &mas->se;
int ret;
/*
* Ensure that our interrupt handler isn't still running from some
* prior command before we start messing with the hardware behind
* its back. We don't need to _keep_ the lock here since we're only
* worried about racing with out interrupt handler. The SPI core
* already handles making sure that we're not trying to do two
* transfers at once or setting a chip select and doing a transfer
* concurrently.
*
* NOTE: we actually _can't_ hold the lock here because possibly we
* might call clk_set_rate() which needs to be able to sleep.
*/
spin_lock_irq(&mas->lock);
spin_unlock_irq(&mas->lock);
/* We always control CS manually */
spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG);
if (xfer->bits_per_word != mas->cur_bits_per_word) {
spi_setup_word_len(mas, mode, xfer->bits_per_word);
mas->cur_bits_per_word = xfer->bits_per_word;
}
/* Speed and bits per word can be overridden per transfer */
ret = geni_spi_set_clock_and_bw(mas, xfer->speed_hz);
if (ret)
return;
mas->tx_rem_bytes = 0;
mas->rx_rem_bytes = 0;
spi_tx_cfg &= ~CS_TOGGLE;
if (!(mas->cur_bits_per_word % MIN_WORD_LEN))
len = xfer->len * BITS_PER_BYTE / mas->cur_bits_per_word;
else
len = xfer->len / (mas->cur_bits_per_word / BITS_PER_BYTE + 1);
len &= TRANS_LEN_MSK;
mas->cur_xfer = xfer;
if (xfer->tx_buf) {
m_cmd |= SPI_TX_ONLY;
mas->tx_rem_bytes = xfer->len;
writel(len, se->base + SE_SPI_TX_TRANS_LEN);
}
if (xfer->rx_buf) {
m_cmd |= SPI_RX_ONLY;
writel(len, se->base + SE_SPI_RX_TRANS_LEN);
mas->rx_rem_bytes = xfer->len;
}
writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG);
/*
* Lock around right before we start the transfer since our
* interrupt could come in at any time now.
*/
spin_lock_irq(&mas->lock);
geni_se_setup_m_cmd(se, m_cmd, FRAGMENTATION);
/*
* TX_WATERMARK_REG should be set after SPI configuration and
* setting up GENI SE engine, as driver starts data transfer
* for the watermark interrupt.
*/
if (m_cmd & SPI_TX_ONLY)
writel(mas->tx_wm, se->base + SE_GENI_TX_WATERMARK_REG);
spin_unlock_irq(&mas->lock);
}
static int spi_geni_transfer_one(struct spi_master *spi,
struct spi_device *slv,
struct spi_transfer *xfer)
{
struct spi_geni_master *mas = spi_master_get_devdata(spi);
/* Terminate and return success for 0 byte length transfer */
if (!xfer->len)
return 0;
setup_fifo_xfer(xfer, mas, slv->mode, spi);
return 1;
pm_runtime_put(mas->dev);
return 0;
}
static unsigned int geni_byte_per_fifo_word(struct spi_geni_master *mas)
@ -431,7 +346,7 @@ static unsigned int geni_byte_per_fifo_word(struct spi_geni_master *mas)
return mas->fifo_width_bits / BITS_PER_BYTE;
}
static void geni_spi_handle_tx(struct spi_geni_master *mas)
static bool geni_spi_handle_tx(struct spi_geni_master *mas)
{
struct geni_se *se = &mas->se;
unsigned int max_bytes;
@ -456,8 +371,11 @@ static void geni_spi_handle_tx(struct spi_geni_master *mas)
iowrite32_rep(se->base + SE_GENI_TX_FIFOn, &fifo_word, 1);
}
mas->tx_rem_bytes -= max_bytes;
if (!mas->tx_rem_bytes)
if (!mas->tx_rem_bytes) {
writel(0, se->base + SE_GENI_TX_WATERMARK_REG);
return false;
}
return true;
}
static void geni_spi_handle_rx(struct spi_geni_master *mas)
@ -496,6 +414,95 @@ static void geni_spi_handle_rx(struct spi_geni_master *mas)
mas->rx_rem_bytes -= rx_bytes;
}
static void setup_fifo_xfer(struct spi_transfer *xfer,
struct spi_geni_master *mas,
u16 mode, struct spi_master *spi)
{
u32 m_cmd = 0;
u32 len;
struct geni_se *se = &mas->se;
int ret;
/*
* Ensure that our interrupt handler isn't still running from some
* prior command before we start messing with the hardware behind
* its back. We don't need to _keep_ the lock here since we're only
* worried about racing with out interrupt handler. The SPI core
* already handles making sure that we're not trying to do two
* transfers at once or setting a chip select and doing a transfer
* concurrently.
*
* NOTE: we actually _can't_ hold the lock here because possibly we
* might call clk_set_rate() which needs to be able to sleep.
*/
spin_lock_irq(&mas->lock);
spin_unlock_irq(&mas->lock);
if (xfer->bits_per_word != mas->cur_bits_per_word) {
spi_setup_word_len(mas, mode, xfer->bits_per_word);
mas->cur_bits_per_word = xfer->bits_per_word;
}
/* Speed and bits per word can be overridden per transfer */
ret = geni_spi_set_clock_and_bw(mas, xfer->speed_hz);
if (ret)
return;
mas->tx_rem_bytes = 0;
mas->rx_rem_bytes = 0;
if (!(mas->cur_bits_per_word % MIN_WORD_LEN))
len = xfer->len * BITS_PER_BYTE / mas->cur_bits_per_word;
else
len = xfer->len / (mas->cur_bits_per_word / BITS_PER_BYTE + 1);
len &= TRANS_LEN_MSK;
mas->cur_xfer = xfer;
if (xfer->tx_buf) {
m_cmd |= SPI_TX_ONLY;
mas->tx_rem_bytes = xfer->len;
writel(len, se->base + SE_SPI_TX_TRANS_LEN);
}
if (xfer->rx_buf) {
m_cmd |= SPI_RX_ONLY;
writel(len, se->base + SE_SPI_RX_TRANS_LEN);
mas->rx_rem_bytes = xfer->len;
}
/*
* Lock around right before we start the transfer since our
* interrupt could come in at any time now.
*/
spin_lock_irq(&mas->lock);
geni_se_setup_m_cmd(se, m_cmd, FRAGMENTATION);
/*
* TX_WATERMARK_REG should be set after SPI configuration and
* setting up GENI SE engine, as driver starts data transfer
* for the watermark interrupt.
*/
if (m_cmd & SPI_TX_ONLY) {
if (geni_spi_handle_tx(mas))
writel(mas->tx_wm, se->base + SE_GENI_TX_WATERMARK_REG);
}
spin_unlock_irq(&mas->lock);
}
static int spi_geni_transfer_one(struct spi_master *spi,
struct spi_device *slv,
struct spi_transfer *xfer)
{
struct spi_geni_master *mas = spi_master_get_devdata(spi);
/* Terminate and return success for 0 byte length transfer */
if (!xfer->len)
return 0;
setup_fifo_xfer(xfer, mas, slv->mode, spi);
return 1;
}
static irqreturn_t geni_spi_isr(int irq, void *data)
{
struct spi_master *spi = data;
@ -613,11 +620,9 @@ static int spi_geni_probe(struct platform_device *pdev)
return PTR_ERR(mas->se.opp_table);
/* OPP table is optional */
ret = dev_pm_opp_of_add_table(&pdev->dev);
if (!ret) {
mas->se.has_opp_table = true;
} else if (ret != -ENODEV) {
if (ret && ret != -ENODEV) {
dev_err(&pdev->dev, "invalid OPP table in device tree\n");
return ret;
goto put_clkname;
}
spi->bus_num = -1;
@ -669,8 +674,8 @@ spi_geni_probe_free_irq:
spi_geni_probe_runtime_disable:
pm_runtime_disable(dev);
spi_master_put(spi);
if (mas->se.has_opp_table)
dev_pm_opp_of_remove_table(&pdev->dev);
dev_pm_opp_of_remove_table(&pdev->dev);
put_clkname:
dev_pm_opp_put_clkname(mas->se.opp_table);
return ret;
}
@ -685,8 +690,7 @@ static int spi_geni_remove(struct platform_device *pdev)
free_irq(mas->irq, spi);
pm_runtime_disable(&pdev->dev);
if (mas->se.has_opp_table)
dev_pm_opp_of_remove_table(&pdev->dev);
dev_pm_opp_of_remove_table(&pdev->dev);
dev_pm_opp_put_clkname(mas->se.opp_table);
return 0;
}

261
drivers/spi/spi-hisi-sfc-v3xx.c
Просмотреть файл

@ -7,7 +7,9 @@
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/completion.h>
#include <linux/dmi.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@ -17,18 +19,11 @@
#define HISI_SFC_V3XX_VERSION (0x1f8)
#define HISI_SFC_V3XX_INT_STAT (0x120)
#define HISI_SFC_V3XX_INT_STAT_PP_ERR BIT(2)
#define HISI_SFC_V3XX_INT_STAT_ADDR_IACCES BIT(5)
#define HISI_SFC_V3XX_RAW_INT_STAT (0x120)
#define HISI_SFC_V3XX_INT_STAT (0x124)
#define HISI_SFC_V3XX_INT_MASK (0x128)
#define HISI_SFC_V3XX_INT_CLR (0x12c)
#define HISI_SFC_V3XX_INT_CLR_CLEAR (0xff)
#define HISI_SFC_V3XX_CMD_CFG (0x300)
#define HISI_SFC_V3XX_CMD_CFG_DUAL_IN_DUAL_OUT (1 << 17)
#define HISI_SFC_V3XX_CMD_CFG_DUAL_IO (2 << 17)
#define HISI_SFC_V3XX_CMD_CFG_FULL_DIO (3 << 17)
#define HISI_SFC_V3XX_CMD_CFG_QUAD_IN_QUAD_OUT (5 << 17)
#define HISI_SFC_V3XX_CMD_CFG_QUAD_IO (6 << 17)
#define HISI_SFC_V3XX_CMD_CFG_FULL_QIO (7 << 17)
#define HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF 9
#define HISI_SFC_V3XX_CMD_CFG_RW_MSK BIT(8)
#define HISI_SFC_V3XX_CMD_CFG_DATA_EN_MSK BIT(7)
@ -40,12 +35,99 @@
#define HISI_SFC_V3XX_CMD_ADDR (0x30c)
#define HISI_SFC_V3XX_CMD_DATABUF0 (0x400)
/* Common definition of interrupt bit masks */
#define HISI_SFC_V3XX_INT_MASK_ALL (0x1ff) /* all the masks */
#define HISI_SFC_V3XX_INT_MASK_CPLT BIT(0) /* command execution complete */
#define HISI_SFC_V3XX_INT_MASK_PP_ERR BIT(2) /* page progrom error */
#define HISI_SFC_V3XX_INT_MASK_IACCES BIT(5) /* error visiting inaccessible/
* protected address
*/
/* IO Mode definition in HISI_SFC_V3XX_CMD_CFG */
#define HISI_SFC_V3XX_STD (0 << 17)
#define HISI_SFC_V3XX_DIDO (1 << 17)
#define HISI_SFC_V3XX_DIO (2 << 17)
#define HISI_SFC_V3XX_FULL_DIO (3 << 17)
#define HISI_SFC_V3XX_QIQO (5 << 17)
#define HISI_SFC_V3XX_QIO (6 << 17)
#define HISI_SFC_V3XX_FULL_QIO (7 << 17)
/*
* The IO modes lookup table. hisi_sfc_v3xx_io_modes[(z - 1) / 2][y / 2][x / 2]
* stands for x-y-z mode, as described in SFDP terminology. -EIO indicates
* an invalid mode.
*/
static const int hisi_sfc_v3xx_io_modes[2][3][3] = {
{
{ HISI_SFC_V3XX_DIDO, HISI_SFC_V3XX_DIDO, HISI_SFC_V3XX_DIDO },
{ HISI_SFC_V3XX_DIO, HISI_SFC_V3XX_FULL_DIO, -EIO },
{ -EIO, -EIO, -EIO },
},
{
{ HISI_SFC_V3XX_QIQO, HISI_SFC_V3XX_QIQO, HISI_SFC_V3XX_QIQO },
{ -EIO, -EIO, -EIO },
{ HISI_SFC_V3XX_QIO, -EIO, HISI_SFC_V3XX_FULL_QIO },
},
};
struct hisi_sfc_v3xx_host {
struct device *dev;
void __iomem *regbase;
int max_cmd_dword;
struct completion *completion;
int irq;
};
static void hisi_sfc_v3xx_disable_int(struct hisi_sfc_v3xx_host *host)
{
writel(0, host->regbase + HISI_SFC_V3XX_INT_MASK);
}
static void hisi_sfc_v3xx_enable_int(struct hisi_sfc_v3xx_host *host)
{
writel(HISI_SFC_V3XX_INT_MASK_ALL, host->regbase + HISI_SFC_V3XX_INT_MASK);
}
static void hisi_sfc_v3xx_clear_int(struct hisi_sfc_v3xx_host *host)
{
writel(HISI_SFC_V3XX_INT_MASK_ALL, host->regbase + HISI_SFC_V3XX_INT_CLR);
}
/*
* The interrupt status register indicates whether an error occurs
* after per operation. Check it, and clear the interrupts for
* next time judgement.
*/
static int hisi_sfc_v3xx_handle_completion(struct hisi_sfc_v3xx_host *host)
{
u32 reg;
reg = readl(host->regbase + HISI_SFC_V3XX_RAW_INT_STAT);
hisi_sfc_v3xx_clear_int(host);
if (reg & HISI_SFC_V3XX_INT_MASK_IACCES) {
dev_err(host->dev, "fail to access protected address\n");
return -EIO;
}
if (reg & HISI_SFC_V3XX_INT_MASK_PP_ERR) {
dev_err(host->dev, "page program operation failed\n");
return -EIO;
}
/*
* The other bits of the interrupt registers is not currently
* used and probably not be triggered in this driver. When it
* happens, we regard it as an unsupported error here.
*/
if (!(reg & HISI_SFC_V3XX_INT_MASK_CPLT)) {
dev_err(host->dev, "unsupported error occurred, status=0x%x\n", reg);
return -EIO;
}
return 0;
}
#define HISI_SFC_V3XX_WAIT_TIMEOUT_US 1000000
#define HISI_SFC_V3XX_WAIT_POLL_INTERVAL_US 10
@ -79,6 +161,20 @@ static int hisi_sfc_v3xx_adjust_op_size(struct spi_mem *mem,
return 0;
}
/*
* The controller only supports Standard SPI mode, Duall mode and
* Quad mode. Double sanitize the ops here to avoid OOB access.
*/
static bool hisi_sfc_v3xx_supports_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
if (op->data.buswidth > 4 || op->dummy.buswidth > 4 ||
op->addr.buswidth > 4 || op->cmd.buswidth > 4)
return false;
return spi_mem_default_supports_op(mem, op);
}
/*
* memcpy_{to,from}io doesn't gurantee 32b accesses - which we require for the
* DATABUF registers -so use __io{read,write}32_copy when possible. For
@ -163,61 +259,36 @@ static void hisi_sfc_v3xx_write_databuf(struct hisi_sfc_v3xx_host *host,
}
}
static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host,
const struct spi_mem_op *op,
u8 chip_select)
static int hisi_sfc_v3xx_start_bus(struct hisi_sfc_v3xx_host *host,
const struct spi_mem_op *op,
u8 chip_select)
{
int ret, len = op->data.nbytes;
u32 int_stat, config = 0;
int len = op->data.nbytes, buswidth_mode;
u32 config = 0;
if (op->addr.nbytes)
config |= HISI_SFC_V3XX_CMD_CFG_ADDR_EN_MSK;
switch (op->data.buswidth) {
case 0 ... 1:
break;
case 2:
if (op->addr.buswidth <= 1) {
config |= HISI_SFC_V3XX_CMD_CFG_DUAL_IN_DUAL_OUT;
} else if (op->addr.buswidth == 2) {
if (op->cmd.buswidth <= 1) {
config |= HISI_SFC_V3XX_CMD_CFG_DUAL_IO;
} else if (op->cmd.buswidth == 2) {
config |= HISI_SFC_V3XX_CMD_CFG_FULL_DIO;
} else {
return -EIO;
}
} else {
return -EIO;
}
break;
case 4:
if (op->addr.buswidth <= 1) {
config |= HISI_SFC_V3XX_CMD_CFG_QUAD_IN_QUAD_OUT;
} else if (op->addr.buswidth == 4) {
if (op->cmd.buswidth <= 1) {
config |= HISI_SFC_V3XX_CMD_CFG_QUAD_IO;
} else if (op->cmd.buswidth == 4) {
config |= HISI_SFC_V3XX_CMD_CFG_FULL_QIO;
} else {
return -EIO;
}
} else {
return -EIO;
}
break;
default:
return -EOPNOTSUPP;
if (op->data.buswidth == 0 || op->data.buswidth == 1) {
buswidth_mode = HISI_SFC_V3XX_STD;
} else {
int data_idx, addr_idx, cmd_idx;
data_idx = (op->data.buswidth - 1) / 2;
addr_idx = op->addr.buswidth / 2;
cmd_idx = op->cmd.buswidth / 2;
buswidth_mode = hisi_sfc_v3xx_io_modes[data_idx][addr_idx][cmd_idx];
}
if (buswidth_mode < 0)
return buswidth_mode;
config |= buswidth_mode;
if (op->data.dir != SPI_MEM_NO_DATA) {
config |= (len - 1) << HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF;
config |= HISI_SFC_V3XX_CMD_CFG_DATA_EN_MSK;
}
if (op->data.dir == SPI_MEM_DATA_OUT)
hisi_sfc_v3xx_write_databuf(host, op->data.buf.out, len);
else if (op->data.dir == SPI_MEM_DATA_IN)
if (op->data.dir == SPI_MEM_DATA_IN)
config |= HISI_SFC_V3XX_CMD_CFG_RW_MSK;
config |= op->dummy.nbytes << HISI_SFC_V3XX_CMD_CFG_DUMMY_CNT_OFF |
@ -229,31 +300,46 @@ static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host,
writel(config, host->regbase + HISI_SFC_V3XX_CMD_CFG);
ret = hisi_sfc_v3xx_wait_cmd_idle(host);
return 0;
}
static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host,
const struct spi_mem_op *op,
u8 chip_select)
{
DECLARE_COMPLETION_ONSTACK(done);
int ret;
if (host->irq) {
host->completion = &done;
hisi_sfc_v3xx_enable_int(host);
}
if (op->data.dir == SPI_MEM_DATA_OUT)
hisi_sfc_v3xx_write_databuf(host, op->data.buf.out, op->data.nbytes);
ret = hisi_sfc_v3xx_start_bus(host, op, chip_select);
if (ret)
return ret;
/*
* The interrupt status register indicates whether an error occurs
* after per operation. Check it, and clear the interrupts for
* next time judgement.
*/
int_stat = readl(host->regbase + HISI_SFC_V3XX_INT_STAT);
writel(HISI_SFC_V3XX_INT_CLR_CLEAR,
host->regbase + HISI_SFC_V3XX_INT_CLR);
if (host->irq) {
ret = wait_for_completion_timeout(host->completion,
usecs_to_jiffies(HISI_SFC_V3XX_WAIT_TIMEOUT_US));
if (!ret)
ret = -ETIMEDOUT;
else
ret = 0;
if (int_stat & HISI_SFC_V3XX_INT_STAT_ADDR_IACCES) {
dev_err(host->dev, "fail to access protected address\n");
return -EIO;
hisi_sfc_v3xx_disable_int(host);
host->completion = NULL;
} else {
ret = hisi_sfc_v3xx_wait_cmd_idle(host);
}
if (int_stat & HISI_SFC_V3XX_INT_STAT_PP_ERR) {
dev_err(host->dev, "page program operation failed\n");
if (hisi_sfc_v3xx_handle_completion(host) || ret)
return -EIO;
}
if (op->data.dir == SPI_MEM_DATA_IN)
hisi_sfc_v3xx_read_databuf(host, op->data.buf.in, len);
hisi_sfc_v3xx_read_databuf(host, op->data.buf.in, op->data.nbytes);
return 0;
}
@ -272,9 +358,21 @@ static int hisi_sfc_v3xx_exec_op(struct spi_mem *mem,
static const struct spi_controller_mem_ops hisi_sfc_v3xx_mem_ops = {
.adjust_op_size = hisi_sfc_v3xx_adjust_op_size,
.supports_op = hisi_sfc_v3xx_supports_op,
.exec_op = hisi_sfc_v3xx_exec_op,
};
static irqreturn_t hisi_sfc_v3xx_isr(int irq, void *data)
{
struct hisi_sfc_v3xx_host *host = data;
hisi_sfc_v3xx_disable_int(host);
complete(host->completion);
return IRQ_HANDLED;
}
static int hisi_sfc_v3xx_buswidth_override_bits;
/*
@ -341,6 +439,26 @@ static int hisi_sfc_v3xx_probe(struct platform_device *pdev)
goto err_put_master;
}
host->irq = platform_get_irq_optional(pdev, 0);
if (host->irq == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto err_put_master;
}
hisi_sfc_v3xx_disable_int(host);
if (host->irq > 0) {
ret = devm_request_irq(dev, host->irq, hisi_sfc_v3xx_isr, 0,
"hisi-sfc-v3xx", host);
if (ret) {
dev_err(dev, "failed to request irq%d, ret = %d\n", host->irq, ret);
host->irq = 0;
}
} else {
host->irq = 0;
}
ctlr->bus_num = -1;
ctlr->num_chipselect = 1;
ctlr->mem_ops = &hisi_sfc_v3xx_mem_ops;
@ -360,7 +478,8 @@ static int hisi_sfc_v3xx_probe(struct platform_device *pdev)
if (ret)
goto err_put_master;
dev_info(&pdev->dev, "hw version 0x%x\n", version);
dev_info(&pdev->dev, "hw version 0x%x, %s mode.\n",
version, host->irq ? "irq" : "polling");
return 0;

11
drivers/spi/spi-imx.c
Просмотреть файл

@ -1503,6 +1503,8 @@ static int spi_imx_transfer(struct spi_device *spi,
{
struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
transfer->effective_speed_hz = spi_imx->spi_bus_clk;
/* flush rxfifo before transfer */
while (spi_imx->devtype_data->rx_available(spi_imx))
readl(spi_imx->base + MXC_CSPIRXDATA);
@ -1695,7 +1697,7 @@ static int spi_imx_probe(struct platform_device *pdev)
goto out_runtime_pm_put;
if (ret < 0)
dev_err(&pdev->dev, "dma setup error %d, use pio\n",
dev_dbg(&pdev->dev, "dma setup error %d, use pio\n",
ret);
}
@ -1707,16 +1709,17 @@ static int spi_imx_probe(struct platform_device *pdev)
ret = spi_bitbang_start(&spi_imx->bitbang);
if (ret) {
dev_err(&pdev->dev, "bitbang start failed with %d\n", ret);
goto out_runtime_pm_put;
goto out_bitbang_start;
}
dev_info(&pdev->dev, "probed\n");
pm_runtime_mark_last_busy(spi_imx->dev);
pm_runtime_put_autosuspend(spi_imx->dev);
return ret;
out_bitbang_start:
if (spi_imx->devtype_data->has_dmamode)
spi_imx_sdma_exit(spi_imx);
out_runtime_pm_put:
pm_runtime_dont_use_autosuspend(spi_imx->dev);
pm_runtime_put_sync(spi_imx->dev);

12
drivers/spi/spi-lantiq-ssc.c
Просмотреть файл

@ -625,9 +625,8 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data)
struct lantiq_ssc_spi *spi = data;
const struct lantiq_ssc_hwcfg *hwcfg = spi->hwcfg;
u32 val = lantiq_ssc_readl(spi, hwcfg->irncr);
unsigned long flags;
spin_lock_irqsave(&spi->lock, flags);
spin_lock(&spi->lock);
if (hwcfg->irq_ack)
lantiq_ssc_writel(spi, val, hwcfg->irncr);
@ -652,12 +651,12 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data)
}
}
spin_unlock_irqrestore(&spi->lock, flags);
spin_unlock(&spi->lock);
return IRQ_HANDLED;
completed:
queue_work(spi->wq, &spi->work);
spin_unlock_irqrestore(&spi->lock, flags);
spin_unlock(&spi->lock);
return IRQ_HANDLED;
}
@ -668,12 +667,11 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data)
const struct lantiq_ssc_hwcfg *hwcfg = spi->hwcfg;
u32 stat = lantiq_ssc_readl(spi, LTQ_SPI_STAT);
u32 val = lantiq_ssc_readl(spi, hwcfg->irncr);
unsigned long flags;
if (!(stat & LTQ_SPI_STAT_ERRORS))
return IRQ_NONE;
spin_lock_irqsave(&spi->lock, flags);
spin_lock(&spi->lock);
if (hwcfg->irq_ack)
lantiq_ssc_writel(spi, val, hwcfg->irncr);
@ -697,7 +695,7 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data)
if (spi->master->cur_msg)
spi->master->cur_msg->status = -EIO;
queue_work(spi->wq, &spi->work);
spin_unlock_irqrestore(&spi->lock, flags);
spin_unlock(&spi->lock);
return IRQ_HANDLED;
}

409
drivers/spi/spi-mtk-nor.c
Просмотреть файл

@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
#include <linux/string.h>
@ -27,6 +28,7 @@
#define MTK_NOR_CMD_MASK GENMASK(5, 0)
#define MTK_NOR_REG_PRG_CNT 0x04
#define MTK_NOR_PRG_CNT_MAX 56
#define MTK_NOR_REG_RDATA 0x0c
#define MTK_NOR_REG_RADR0 0x10
@ -78,6 +80,8 @@
#define MTK_NOR_REG_DMA_FADR 0x71c
#define MTK_NOR_REG_DMA_DADR 0x720
#define MTK_NOR_REG_DMA_END_DADR 0x724
#define MTK_NOR_REG_DMA_DADR_HB 0x738
#define MTK_NOR_REG_DMA_END_DADR_HB 0x73c
#define MTK_NOR_PRG_MAX_SIZE 6
// Reading DMA src/dst addresses have to be 16-byte aligned
@ -89,18 +93,20 @@
// Buffered page program can do one 128-byte transfer
#define MTK_NOR_PP_SIZE 128
#define CLK_TO_US(sp, clkcnt) ((clkcnt) * 1000000 / sp->spi_freq)
#define CLK_TO_US(sp, clkcnt) DIV_ROUND_UP(clkcnt, sp->spi_freq / 1000000)
struct mtk_nor {
struct spi_controller *ctlr;
struct device *dev;
void __iomem *base;
u8 *buffer;
dma_addr_t buffer_dma;
struct clk *spi_clk;
struct clk *ctlr_clk;
unsigned int spi_freq;
bool wbuf_en;
bool has_irq;
bool high_dma;
struct completion op_done;
};
@ -144,6 +150,11 @@ static void mtk_nor_set_addr(struct mtk_nor *sp, const struct spi_mem_op *op)
}
}
static bool need_bounce(struct mtk_nor *sp, const struct spi_mem_op *op)
{
return ((uintptr_t)op->data.buf.in & MTK_NOR_DMA_ALIGN_MASK);
}
static bool mtk_nor_match_read(const struct spi_mem_op *op)
{
int dummy = 0;
@ -167,9 +178,77 @@ static bool mtk_nor_match_read(const struct spi_mem_op *op)
return false;
}
static bool mtk_nor_match_prg(const struct spi_mem_op *op)
{
int tx_len, rx_len, prg_len, prg_left;
// prg mode is spi-only.
if ((op->cmd.buswidth > 1) || (op->addr.buswidth > 1) ||
(op->dummy.buswidth > 1) || (op->data.buswidth > 1))
return false;
tx_len = op->cmd.nbytes + op->addr.nbytes;
if (op->data.dir == SPI_MEM_DATA_OUT) {
// count dummy bytes only if we need to write data after it
tx_len += op->dummy.nbytes;
// leave at least one byte for data
if (tx_len > MTK_NOR_REG_PRGDATA_MAX)
return false;
// if there's no addr, meaning adjust_op_size is impossible,
// check data length as well.
if ((!op->addr.nbytes) &&
(tx_len + op->data.nbytes > MTK_NOR_REG_PRGDATA_MAX + 1))
return false;
} else if (op->data.dir == SPI_MEM_DATA_IN) {
if (tx_len > MTK_NOR_REG_PRGDATA_MAX + 1)
return false;
rx_len = op->data.nbytes;
prg_left = MTK_NOR_PRG_CNT_MAX / 8 - tx_len - op->dummy.nbytes;
if (prg_left > MTK_NOR_REG_SHIFT_MAX + 1)
prg_left = MTK_NOR_REG_SHIFT_MAX + 1;
if (rx_len > prg_left) {
if (!op->addr.nbytes)
return false;
rx_len = prg_left;
}
prg_len = tx_len + op->dummy.nbytes + rx_len;
if (prg_len > MTK_NOR_PRG_CNT_MAX / 8)
return false;
} else {
prg_len = tx_len + op->dummy.nbytes;
if (prg_len > MTK_NOR_PRG_CNT_MAX / 8)
return false;
}
return true;
}
static void mtk_nor_adj_prg_size(struct spi_mem_op *op)
{
int tx_len, tx_left, prg_left;
tx_len = op->cmd.nbytes + op->addr.nbytes;
if (op->data.dir == SPI_MEM_DATA_OUT) {
tx_len += op->dummy.nbytes;
tx_left = MTK_NOR_REG_PRGDATA_MAX + 1 - tx_len;
if (op->data.nbytes > tx_left)
op->data.nbytes = tx_left;
} else if (op->data.dir == SPI_MEM_DATA_IN) {
prg_left = MTK_NOR_PRG_CNT_MAX / 8 - tx_len - op->dummy.nbytes;
if (prg_left > MTK_NOR_REG_SHIFT_MAX + 1)
prg_left = MTK_NOR_REG_SHIFT_MAX + 1;
if (op->data.nbytes > prg_left)
op->data.nbytes = prg_left;
}
}
static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)
{
size_t len;
struct mtk_nor *sp = spi_controller_get_devdata(mem->spi->master);
if (!op->data.nbytes)
return 0;
@ -177,11 +256,14 @@ static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)
if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) {
if ((op->data.dir == SPI_MEM_DATA_IN) &&
mtk_nor_match_read(op)) {
// limit size to prevent timeout calculation overflow
if (op->data.nbytes > 0x400000)
op->data.nbytes = 0x400000;
if ((op->addr.val & MTK_NOR_DMA_ALIGN_MASK) ||
(op->data.nbytes < MTK_NOR_DMA_ALIGN))
op->data.nbytes = 1;
else if (!((ulong)(op->data.buf.in) &
MTK_NOR_DMA_ALIGN_MASK))
else if (!need_bounce(sp, op))
op->data.nbytes &= ~MTK_NOR_DMA_ALIGN_MASK;
else if (op->data.nbytes > MTK_NOR_BOUNCE_BUF_SIZE)
op->data.nbytes = MTK_NOR_BOUNCE_BUF_SIZE;
@ -195,41 +277,37 @@ static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)
}
}
len = MTK_NOR_PRG_MAX_SIZE - op->cmd.nbytes - op->addr.nbytes -
op->dummy.nbytes;
if (op->data.nbytes > len)
op->data.nbytes = len;
mtk_nor_adj_prg_size(op);
return 0;
}
static bool mtk_nor_supports_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
size_t len;
if (!spi_mem_default_supports_op(mem, op))
return false;
if (op->cmd.buswidth != 1)
return false;
/* DTR ops not supported. */
if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr)
return false;
if (op->cmd.nbytes != 1)
return false;
if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) {
if ((op->data.dir == SPI_MEM_DATA_IN) && mtk_nor_match_read(op))
return true;
else if (op->data.dir == SPI_MEM_DATA_OUT)
return (op->addr.buswidth == 1) &&
(op->dummy.buswidth == 0) &&
(op->data.buswidth == 1);
switch(op->data.dir) {
case SPI_MEM_DATA_IN:
if (mtk_nor_match_read(op))
return true;
break;
case SPI_MEM_DATA_OUT:
if ((op->addr.buswidth == 1) &&
(op->dummy.nbytes == 0) &&
(op->data.buswidth == 1))
return true;
break;
default:
break;
}
}
len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes;
if ((len > MTK_NOR_PRG_MAX_SIZE) ||
((op->data.nbytes) && (len == MTK_NOR_PRG_MAX_SIZE)))
return false;
return true;
return mtk_nor_match_prg(op);
}
static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op)
@ -258,24 +336,24 @@ static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op)
mtk_nor_rmw(sp, MTK_NOR_REG_BUSCFG, reg, MTK_NOR_BUS_MODE_MASK);
}
static int mtk_nor_read_dma(struct mtk_nor *sp, u32 from, unsigned int length,
u8 *buffer)
static int mtk_nor_dma_exec(struct mtk_nor *sp, u32 from, unsigned int length,
dma_addr_t dma_addr)
{
int ret = 0;
ulong delay;
u32 reg;
dma_addr_t dma_addr;
dma_addr = dma_map_single(sp->dev, buffer, length, DMA_FROM_DEVICE);
if (dma_mapping_error(sp->dev, dma_addr)) {
dev_err(sp->dev, "failed to map dma buffer.\n");
return -EINVAL;
}
writel(from, sp->base + MTK_NOR_REG_DMA_FADR);
writel(dma_addr, sp->base + MTK_NOR_REG_DMA_DADR);
writel(dma_addr + length, sp->base + MTK_NOR_REG_DMA_END_DADR);
if (sp->high_dma) {
writel(upper_32_bits(dma_addr),
sp->base + MTK_NOR_REG_DMA_DADR_HB);
writel(upper_32_bits(dma_addr + length),
sp->base + MTK_NOR_REG_DMA_END_DADR_HB);
}
if (sp->has_irq) {
reinit_completion(&sp->op_done);
mtk_nor_rmw(sp, MTK_NOR_REG_IRQ_EN, MTK_NOR_IRQ_DMA, 0);
@ -295,30 +373,49 @@ static int mtk_nor_read_dma(struct mtk_nor *sp, u32 from, unsigned int length,
(delay + 1) * 100);
}
dma_unmap_single(sp->dev, dma_addr, length, DMA_FROM_DEVICE);
if (ret < 0)
dev_err(sp->dev, "dma read timeout.\n");
return ret;
}
static int mtk_nor_read_bounce(struct mtk_nor *sp, u32 from,
unsigned int length, u8 *buffer)
static int mtk_nor_read_bounce(struct mtk_nor *sp, const struct spi_mem_op *op)
{
unsigned int rdlen;
int ret;
if (length & MTK_NOR_DMA_ALIGN_MASK)
rdlen = (length + MTK_NOR_DMA_ALIGN) & ~MTK_NOR_DMA_ALIGN_MASK;
if (op->data.nbytes & MTK_NOR_DMA_ALIGN_MASK)
rdlen = (op->data.nbytes + MTK_NOR_DMA_ALIGN) & ~MTK_NOR_DMA_ALIGN_MASK;
else
rdlen = length;
rdlen = op->data.nbytes;
ret = mtk_nor_read_dma(sp, from, rdlen, sp->buffer);
if (ret)
return ret;
ret = mtk_nor_dma_exec(sp, op->addr.val, rdlen, sp->buffer_dma);
memcpy(buffer, sp->buffer, length);
return 0;
if (!ret)
memcpy(op->data.buf.in, sp->buffer, op->data.nbytes);
return ret;
}
static int mtk_nor_read_dma(struct mtk_nor *sp, const struct spi_mem_op *op)
{
int ret;
dma_addr_t dma_addr;
if (need_bounce(sp, op))
return mtk_nor_read_bounce(sp, op);
dma_addr = dma_map_single(sp->dev, op->data.buf.in,
op->data.nbytes, DMA_FROM_DEVICE);
if (dma_mapping_error(sp->dev, dma_addr))
return -EINVAL;
ret = mtk_nor_dma_exec(sp, op->addr.val, op->data.nbytes, dma_addr);
dma_unmap_single(sp->dev, dma_addr, op->data.nbytes, DMA_FROM_DEVICE);
return ret;
}
static int mtk_nor_read_pio(struct mtk_nor *sp, const struct spi_mem_op *op)
@ -397,6 +494,83 @@ static int mtk_nor_pp_unbuffered(struct mtk_nor *sp,
return mtk_nor_cmd_exec(sp, MTK_NOR_CMD_WRITE, 6 * BITS_PER_BYTE);
}
static int mtk_nor_spi_mem_prg(struct mtk_nor *sp, const struct spi_mem_op *op)
{
int rx_len = 0;
int reg_offset = MTK_NOR_REG_PRGDATA_MAX;
int tx_len, prg_len;
int i, ret;
void __iomem *reg;
u8 bufbyte;
tx_len = op->cmd.nbytes + op->addr.nbytes;
// count dummy bytes only if we need to write data after it
if (op->data.dir == SPI_MEM_DATA_OUT)
tx_len += op->dummy.nbytes + op->data.nbytes;
else if (op->data.dir == SPI_MEM_DATA_IN)
rx_len = op->data.nbytes;
prg_len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes +
op->data.nbytes;
// an invalid op may reach here if the caller calls exec_op without
// adjust_op_size. return -EINVAL instead of -ENOTSUPP so that
// spi-mem won't try this op again with generic spi transfers.
if ((tx_len > MTK_NOR_REG_PRGDATA_MAX + 1) ||
(rx_len > MTK_NOR_REG_SHIFT_MAX + 1) ||
(prg_len > MTK_NOR_PRG_CNT_MAX / 8))
return -EINVAL;
// fill tx data
for (i = op->cmd.nbytes; i > 0; i--, reg_offset--) {
reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset);
bufbyte = (op->cmd.opcode >> ((i - 1) * BITS_PER_BYTE)) & 0xff;
writeb(bufbyte, reg);
}
for (i = op->addr.nbytes; i > 0; i--, reg_offset--) {
reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset);
bufbyte = (op->addr.val >> ((i - 1) * BITS_PER_BYTE)) & 0xff;
writeb(bufbyte, reg);
}
if (op->data.dir == SPI_MEM_DATA_OUT) {
for (i = 0; i < op->dummy.nbytes; i++, reg_offset--) {
reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset);
writeb(0, reg);
}
for (i = 0; i < op->data.nbytes; i++, reg_offset--) {
reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset);
writeb(((const u8 *)(op->data.buf.out))[i], reg);
}
}
for (; reg_offset >= 0; reg_offset--) {
reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset);
writeb(0, reg);
}
// trigger op
writel(prg_len * BITS_PER_BYTE, sp->base + MTK_NOR_REG_PRG_CNT);
ret = mtk_nor_cmd_exec(sp, MTK_NOR_CMD_PROGRAM,
prg_len * BITS_PER_BYTE);
if (ret)
return ret;
// fetch read data
reg_offset = 0;
if (op->data.dir == SPI_MEM_DATA_IN) {
for (i = op->data.nbytes - 1; i >= 0; i--, reg_offset++) {
reg = sp->base + MTK_NOR_REG_SHIFT(reg_offset);
((u8 *)(op->data.buf.in))[i] = readb(reg);
}
}
return 0;
}
static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
{
struct mtk_nor *sp = spi_controller_get_devdata(mem->spi->master);
@ -404,7 +578,7 @@ static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
if ((op->data.nbytes == 0) ||
((op->addr.nbytes != 3) && (op->addr.nbytes != 4)))
return -ENOTSUPP;
return mtk_nor_spi_mem_prg(sp, op);
if (op->data.dir == SPI_MEM_DATA_OUT) {
mtk_nor_set_addr(sp, op);
@ -422,19 +596,12 @@ static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
if (op->data.nbytes == 1) {
mtk_nor_set_addr(sp, op);
return mtk_nor_read_pio(sp, op);
} else if (((ulong)(op->data.buf.in) &
MTK_NOR_DMA_ALIGN_MASK)) {
return mtk_nor_read_bounce(sp, op->addr.val,
op->data.nbytes,
op->data.buf.in);
} else {
return mtk_nor_read_dma(sp, op->addr.val,
op->data.nbytes,
op->data.buf.in);
return mtk_nor_read_dma(sp, op);
}
}
return -ENOTSUPP;
return mtk_nor_spi_mem_prg(sp, op);
}
static int mtk_nor_setup(struct spi_device *spi)
@ -524,22 +691,15 @@ static int mtk_nor_enable_clk(struct mtk_nor *sp)
return 0;
}
static int mtk_nor_init(struct mtk_nor *sp)
static void mtk_nor_init(struct mtk_nor *sp)
{
int ret;
ret = mtk_nor_enable_clk(sp);
if (ret)
return ret;
sp->spi_freq = clk_get_rate(sp->spi_clk);
writel(0, sp->base + MTK_NOR_REG_IRQ_EN);
writel(MTK_NOR_IRQ_MASK, sp->base + MTK_NOR_REG_IRQ_STAT);
writel(MTK_NOR_ENABLE_SF_CMD, sp->base + MTK_NOR_REG_WP);
mtk_nor_rmw(sp, MTK_NOR_REG_CFG2, MTK_NOR_WR_CUSTOM_OP_EN, 0);
mtk_nor_rmw(sp, MTK_NOR_REG_CFG3,
MTK_NOR_DISABLE_WREN | MTK_NOR_DISABLE_SR_POLL, 0);
return ret;
}
static irqreturn_t mtk_nor_irq_handler(int irq, void *data)
@ -575,7 +735,8 @@ static const struct spi_controller_mem_ops mtk_nor_mem_ops = {
};
static const struct of_device_id mtk_nor_match[] = {
{ .compatible = "mediatek,mt8173-nor" },
{ .compatible = "mediatek,mt8192-nor", .data = (void *)36 },
{ .compatible = "mediatek,mt8173-nor", .data = (void *)32 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mtk_nor_match);
@ -585,9 +746,9 @@ static int mtk_nor_probe(struct platform_device *pdev)
struct spi_controller *ctlr;
struct mtk_nor *sp;
void __iomem *base;
u8 *buffer;
struct clk *spi_clk, *ctlr_clk;
int ret, irq;
unsigned long dma_bits;
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
@ -601,15 +762,11 @@ static int mtk_nor_probe(struct platform_device *pdev)
if (IS_ERR(ctlr_clk))
return PTR_ERR(ctlr_clk);
buffer = devm_kmalloc(&pdev->dev,
MTK_NOR_BOUNCE_BUF_SIZE + MTK_NOR_DMA_ALIGN,
GFP_KERNEL);
if (!buffer)
return -ENOMEM;
if ((ulong)buffer & MTK_NOR_DMA_ALIGN_MASK)
buffer = (u8 *)(((ulong)buffer + MTK_NOR_DMA_ALIGN) &
~MTK_NOR_DMA_ALIGN_MASK);
dma_bits = (unsigned long)of_device_get_match_data(&pdev->dev);
if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_bits))) {
dev_err(&pdev->dev, "failed to set dma mask(%lu)\n", dma_bits);
return -EINVAL;
}
ctlr = spi_alloc_master(&pdev->dev, sizeof(*sp));
if (!ctlr) {
@ -625,25 +782,43 @@ static int mtk_nor_probe(struct platform_device *pdev)
ctlr->num_chipselect = 1;
ctlr->setup = mtk_nor_setup;
ctlr->transfer_one_message = mtk_nor_transfer_one_message;
ctlr->auto_runtime_pm = true;
dev_set_drvdata(&pdev->dev, ctlr);
sp = spi_controller_get_devdata(ctlr);
sp->base = base;
sp->buffer = buffer;
sp->has_irq = false;
sp->wbuf_en = false;
sp->ctlr = ctlr;
sp->dev = &pdev->dev;
sp->spi_clk = spi_clk;
sp->ctlr_clk = ctlr_clk;
sp->high_dma = (dma_bits > 32);
sp->buffer = dmam_alloc_coherent(&pdev->dev,
MTK_NOR_BOUNCE_BUF_SIZE + MTK_NOR_DMA_ALIGN,
&sp->buffer_dma, GFP_KERNEL);
if (!sp->buffer)
return -ENOMEM;
if ((uintptr_t)sp->buffer & MTK_NOR_DMA_ALIGN_MASK) {
dev_err(sp->dev, "misaligned allocation of internal buffer.\n");
return -ENOMEM;
}
ret = mtk_nor_enable_clk(sp);
if (ret < 0)
return ret;
sp->spi_freq = clk_get_rate(sp->spi_clk);
mtk_nor_init(sp);
irq = platform_get_irq_optional(pdev, 0);
if (irq < 0) {
dev_warn(sp->dev, "IRQ not available.");
} else {
writel(MTK_NOR_IRQ_MASK, base + MTK_NOR_REG_IRQ_STAT);
writel(0, base + MTK_NOR_REG_IRQ_EN);
ret = devm_request_irq(sp->dev, irq, mtk_nor_irq_handler, 0,
pdev->name, sp);
if (ret < 0) {
@ -654,34 +829,86 @@ static int mtk_nor_probe(struct platform_device *pdev)
}
}
ret = mtk_nor_init(sp);
if (ret < 0) {
kfree(ctlr);
return ret;
}
pm_runtime_set_autosuspend_delay(&pdev->dev, -1);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_noresume(&pdev->dev);
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret < 0)
goto err_probe;
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
dev_info(&pdev->dev, "spi frequency: %d Hz\n", sp->spi_freq);
return devm_spi_register_controller(&pdev->dev, ctlr);
return 0;
err_probe:
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
mtk_nor_disable_clk(sp);
return ret;
}
static int mtk_nor_remove(struct platform_device *pdev)
{
struct spi_controller *ctlr;
struct mtk_nor *sp;
struct spi_controller *ctlr = dev_get_drvdata(&pdev->dev);
struct mtk_nor *sp = spi_controller_get_devdata(ctlr);
ctlr = dev_get_drvdata(&pdev->dev);
sp = spi_controller_get_devdata(ctlr);
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
mtk_nor_disable_clk(sp);
return 0;
}
static int __maybe_unused mtk_nor_runtime_suspend(struct device *dev)
{
struct spi_controller *ctlr = dev_get_drvdata(dev);
struct mtk_nor *sp = spi_controller_get_devdata(ctlr);
mtk_nor_disable_clk(sp);
return 0;
}
static int __maybe_unused mtk_nor_runtime_resume(struct device *dev)
{
struct spi_controller *ctlr = dev_get_drvdata(dev);
struct mtk_nor *sp = spi_controller_get_devdata(ctlr);
return mtk_nor_enable_clk(sp);
}
static int __maybe_unused mtk_nor_suspend(struct device *dev)
{
return pm_runtime_force_suspend(dev);
}
static int __maybe_unused mtk_nor_resume(struct device *dev)
{
return pm_runtime_force_resume(dev);
}
static const struct dev_pm_ops mtk_nor_pm_ops = {
SET_RUNTIME_PM_OPS(mtk_nor_runtime_suspend,
mtk_nor_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(mtk_nor_suspend, mtk_nor_resume)
};
static struct platform_driver mtk_nor_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = mtk_nor_match,
.pm = &mtk_nor_pm_ops,
},
.probe = mtk_nor_probe,
.remove = mtk_nor_remove,

5
drivers/spi/spi-mux.c
Просмотреть файл

@ -139,9 +139,8 @@ static int spi_mux_probe(struct spi_device *spi)
priv->mux = devm_mux_control_get(&spi->dev, NULL);
if (IS_ERR(priv->mux)) {
ret = PTR_ERR(priv->mux);
if (ret != -EPROBE_DEFER)
dev_err(&spi->dev, "failed to get control-mux\n");
ret = dev_err_probe(&spi->dev, PTR_ERR(priv->mux),
"failed to get control-mux\n");
goto err_put_ctlr;
}

7
drivers/spi/spi-npcm-fiu.c
Просмотреть файл

@ -677,7 +677,6 @@ static int npcm_fiu_probe(struct platform_device *pdev)
struct npcm_fiu_spi *fiu;
void __iomem *regbase;
struct resource *res;
int ret;
int id;
ctrl = spi_alloc_master(dev, sizeof(*fiu));
@ -736,11 +735,7 @@ static int npcm_fiu_probe(struct platform_device *pdev)
ctrl->num_chipselect = fiu->info->max_cs;
ctrl->dev.of_node = dev->of_node;
ret = devm_spi_register_master(dev, ctrl);
if (ret)
return ret;
return 0;
return devm_spi_register_master(dev, ctrl);
}
static int npcm_fiu_remove(struct platform_device *pdev)

69
drivers/spi/spi-nxp-fspi.c
Просмотреть файл

@ -3,7 +3,8 @@
/*
* NXP FlexSPI(FSPI) controller driver.
*
* Copyright 2019 NXP.
* Copyright 2019-2020 NXP
* Copyright 2020 Puresoftware Ltd.
*
* FlexSPI is a flexsible SPI host controller which supports two SPI
* channels and up to 4 external devices. Each channel supports
@ -30,6 +31,7 @@
* Frieder Schrempf <frieder.schrempf@kontron.de>
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/completion.h>
@ -563,6 +565,9 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
{
int ret;
if (is_acpi_node(f->dev->fwnode))
return 0;
ret = clk_prepare_enable(f->clk_en);
if (ret)
return ret;
@ -576,10 +581,15 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
return 0;
}
static void nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
static int nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
{
if (is_acpi_node(f->dev->fwnode))
return 0;
clk_disable_unprepare(f->clk);
clk_disable_unprepare(f->clk_en);
return 0;
}
/*
@ -1001,7 +1011,7 @@ static int nxp_fspi_probe(struct platform_device *pdev)
f = spi_controller_get_devdata(ctlr);
f->dev = dev;
f->devtype_data = of_device_get_match_data(dev);
f->devtype_data = device_get_match_data(dev);
if (!f->devtype_data) {
ret = -ENODEV;
goto err_put_ctrl;
@ -1010,7 +1020,12 @@ static int nxp_fspi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, f);
/* find the resources - configuration register address space */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_base");
if (is_acpi_node(f->dev->fwnode))
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
else
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "fspi_base");
f->iobase = devm_ioremap_resource(dev, res);
if (IS_ERR(f->iobase)) {
ret = PTR_ERR(f->iobase);
@ -1018,7 +1033,12 @@ static int nxp_fspi_probe(struct platform_device *pdev)
}
/* find the resources - controller memory mapped space */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_mmap");
if (is_acpi_node(f->dev->fwnode))
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
else
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "fspi_mmap");
if (!res) {
ret = -ENODEV;
goto err_put_ctrl;
@ -1029,22 +1049,24 @@ static int nxp_fspi_probe(struct platform_device *pdev)
f->memmap_phy_size = resource_size(res);
/* find the clocks */
f->clk_en = devm_clk_get(dev, "fspi_en");
if (IS_ERR(f->clk_en)) {
ret = PTR_ERR(f->clk_en);
goto err_put_ctrl;
}
if (dev_of_node(&pdev->dev)) {
f->clk_en = devm_clk_get(dev, "fspi_en");
if (IS_ERR(f->clk_en)) {
ret = PTR_ERR(f->clk_en);
goto err_put_ctrl;
}
f->clk = devm_clk_get(dev, "fspi");
if (IS_ERR(f->clk)) {
ret = PTR_ERR(f->clk);
goto err_put_ctrl;
}
f->clk = devm_clk_get(dev, "fspi");
if (IS_ERR(f->clk)) {
ret = PTR_ERR(f->clk);
goto err_put_ctrl;
}
ret = nxp_fspi_clk_prep_enable(f);
if (ret) {
dev_err(dev, "can not enable the clock\n");
goto err_put_ctrl;
ret = nxp_fspi_clk_prep_enable(f);
if (ret) {
dev_err(dev, "can not enable the clock\n");
goto err_put_ctrl;
}
}
/* find the irq */
@ -1127,6 +1149,14 @@ static const struct of_device_id nxp_fspi_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, nxp_fspi_dt_ids);
#ifdef CONFIG_ACPI
static const struct acpi_device_id nxp_fspi_acpi_ids[] = {
{ "NXP0009", .driver_data = (kernel_ulong_t)&lx2160a_data, },
{}
};
MODULE_DEVICE_TABLE(acpi, nxp_fspi_acpi_ids);
#endif
static const struct dev_pm_ops nxp_fspi_pm_ops = {
.suspend = nxp_fspi_suspend,
.resume = nxp_fspi_resume,
@ -1136,6 +1166,7 @@ static struct platform_driver nxp_fspi_driver = {
.driver = {
.name = "nxp-fspi",
.of_match_table = nxp_fspi_dt_ids,
.acpi_match_table = ACPI_PTR(nxp_fspi_acpi_ids),
.pm = &nxp_fspi_pm_ops,
},
.probe = nxp_fspi_probe,

15
drivers/spi/spi-omap2-mcspi.c
Просмотреть файл

@ -24,7 +24,6 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/gcd.h>
#include <linux/iopoll.h>
#include <linux/spi/spi.h>
@ -348,9 +347,19 @@ disable_fifo:
static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit)
{
u32 val;
unsigned long timeout;
return readl_poll_timeout(reg, val, val & bit, 1, MSEC_PER_SEC);
timeout = jiffies + msecs_to_jiffies(1000);
while (!(readl_relaxed(reg) & bit)) {
if (time_after(jiffies, timeout)) {
if (!(readl_relaxed(reg) & bit))
return -ETIMEDOUT;
else
return 0;
}
cpu_relax();
}
return 0;
}
static int mcspi_wait_for_completion(struct omap2_mcspi *mcspi,

25
drivers/spi/spi-qcom-qspi.c
Просмотреть файл

@ -143,7 +143,6 @@ struct qcom_qspi {
struct qspi_xfer xfer;
struct icc_path *icc_path_cpu_to_qspi;
struct opp_table *opp_table;
bool has_opp_table;
unsigned long last_speed;
/* Lock to protect data accessed by IRQs */
spinlock_t lock;
@ -421,9 +420,8 @@ static irqreturn_t qcom_qspi_irq(int irq, void *dev_id)
u32 int_status;
struct qcom_qspi *ctrl = dev_id;
irqreturn_t ret = IRQ_NONE;
unsigned long flags;
spin_lock_irqsave(&ctrl->lock, flags);
spin_lock(&ctrl->lock);
int_status = readl(ctrl->base + MSTR_INT_STATUS);
writel(int_status, ctrl->base + MSTR_INT_STATUS);
@ -451,7 +449,7 @@ static irqreturn_t qcom_qspi_irq(int irq, void *dev_id)
spi_finalize_current_transfer(dev_get_drvdata(ctrl->dev));
}
spin_unlock_irqrestore(&ctrl->lock, flags);
spin_unlock(&ctrl->lock);
return ret;
}
@ -495,9 +493,8 @@ static int qcom_qspi_probe(struct platform_device *pdev)
ctrl->icc_path_cpu_to_qspi = devm_of_icc_get(dev, "qspi-config");
if (IS_ERR(ctrl->icc_path_cpu_to_qspi)) {
ret = PTR_ERR(ctrl->icc_path_cpu_to_qspi);
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get cpu path: %d\n", ret);
ret = dev_err_probe(dev, PTR_ERR(ctrl->icc_path_cpu_to_qspi),
"Failed to get cpu path\n");
goto exit_probe_master_put;
}
/* Set BW vote for register access */
@ -546,11 +543,9 @@ static int qcom_qspi_probe(struct platform_device *pdev)
}
/* OPP table is optional */
ret = dev_pm_opp_of_add_table(&pdev->dev);
if (!ret) {
ctrl->has_opp_table = true;
} else if (ret != -ENODEV) {
if (ret && ret != -ENODEV) {
dev_err(&pdev->dev, "invalid OPP table in device tree\n");
goto exit_probe_master_put;
goto exit_probe_put_clkname;
}
pm_runtime_use_autosuspend(dev);
@ -562,8 +557,9 @@ static int qcom_qspi_probe(struct platform_device *pdev)
return 0;
pm_runtime_disable(dev);
if (ctrl->has_opp_table)
dev_pm_opp_of_remove_table(&pdev->dev);
dev_pm_opp_of_remove_table(&pdev->dev);
exit_probe_put_clkname:
dev_pm_opp_put_clkname(ctrl->opp_table);
exit_probe_master_put:
@ -581,8 +577,7 @@ static int qcom_qspi_remove(struct platform_device *pdev)
spi_unregister_master(master);
pm_runtime_disable(&pdev->dev);
if (ctrl->has_opp_table)
dev_pm_opp_of_remove_table(&pdev->dev);
dev_pm_opp_of_remove_table(&pdev->dev);
dev_pm_opp_put_clkname(ctrl->opp_table);
return 0;

2
drivers/spi/spi-qup.c
Просмотреть файл

@ -848,7 +848,7 @@ static int spi_qup_transfer_one(struct spi_master *master,
{
struct spi_qup *controller = spi_master_get_devdata(master);
unsigned long timeout, flags;
int ret = -EIO;
int ret;
ret = spi_qup_io_prep(spi, xfer);
if (ret)

81
drivers/spi/spi-rspi.c
Просмотреть файл

@ -161,6 +161,7 @@
#define SPCMD_SPRW 0x0010 /* SPI Read/Write Access (Dual/Quad) */
#define SPCMD_SSLA(i) ((i) << 4) /* SSL Assert Signal Setting */
#define SPCMD_BRDV_MASK 0x000c /* Bit Rate Division Setting */
#define SPCMD_BRDV(brdv) ((brdv) << 2)
#define SPCMD_CPOL 0x0002 /* Clock Polarity Setting */
#define SPCMD_CPHA 0x0001 /* Clock Phase Setting */
@ -242,24 +243,40 @@ struct spi_ops {
int (*transfer_one)(struct spi_controller *ctlr,
struct spi_device *spi, struct spi_transfer *xfer);
u16 extra_mode_bits;
u16 min_div;
u16 max_div;
u16 flags;
u16 fifo_size;
u8 num_hw_ss;
};
static void rspi_set_rate(struct rspi_data *rspi)
{
unsigned long clksrc;
int brdv = 0, spbr;
clksrc = clk_get_rate(rspi->clk);
spbr = DIV_ROUND_UP(clksrc, 2 * rspi->speed_hz) - 1;
while (spbr > 255 && brdv < 3) {
brdv++;
spbr = DIV_ROUND_UP(spbr + 1, 2) - 1;
}
rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR);
rspi->spcmd |= SPCMD_BRDV(brdv);
rspi->speed_hz = DIV_ROUND_UP(clksrc, (2U << brdv) * (spbr + 1));
}
/*
* functions for RSPI on legacy SH
*/
static int rspi_set_config_register(struct rspi_data *rspi, int access_size)
{
int spbr;
/* Sets output mode, MOSI signal, and (optionally) loopback */
rspi_write8(rspi, rspi->sppcr, RSPI_SPPCR);
/* Sets transfer bit rate */
spbr = DIV_ROUND_UP(clk_get_rate(rspi->clk), 2 * rspi->speed_hz) - 1;
rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR);
rspi_set_rate(rspi);
/* Disable dummy transmission, set 16-bit word access, 1 frame */
rspi_write8(rspi, 0, RSPI_SPDCR);
@ -289,25 +306,11 @@ static int rspi_set_config_register(struct rspi_data *rspi, int access_size)
*/
static int rspi_rz_set_config_register(struct rspi_data *rspi, int access_size)
{
int spbr;
int div = 0;
unsigned long clksrc;
/* Sets output mode, MOSI signal, and (optionally) loopback */
rspi_write8(rspi, rspi->sppcr, RSPI_SPPCR);
clksrc = clk_get_rate(rspi->clk);
while (div < 3) {
if (rspi->speed_hz >= clksrc/4) /* 4=(CLK/2)/2 */
break;
div++;
clksrc /= 2;
}
/* Sets transfer bit rate */
spbr = DIV_ROUND_UP(clksrc, 2 * rspi->speed_hz) - 1;
rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR);
rspi->spcmd |= div << 2;
rspi_set_rate(rspi);
/* Disable dummy transmission, set byte access */
rspi_write8(rspi, SPDCR_SPLBYTE, RSPI_SPDCR);
@ -334,14 +337,28 @@ static int rspi_rz_set_config_register(struct rspi_data *rspi, int access_size)
*/
static int qspi_set_config_register(struct rspi_data *rspi, int access_size)
{
int spbr;
unsigned long clksrc;
int brdv = 0, spbr;
/* Sets output mode, MOSI signal, and (optionally) loopback */
rspi_write8(rspi, rspi->sppcr, RSPI_SPPCR);
/* Sets transfer bit rate */
spbr = DIV_ROUND_UP(clk_get_rate(rspi->clk), 2 * rspi->speed_hz);
rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR);
clksrc = clk_get_rate(rspi->clk);
if (rspi->speed_hz >= clksrc) {
spbr = 0;
rspi->speed_hz = clksrc;
} else {
spbr = DIV_ROUND_UP(clksrc, 2 * rspi->speed_hz);
while (spbr > 255 && brdv < 3) {
brdv++;
spbr = DIV_ROUND_UP(spbr, 2);
}
spbr = clamp(spbr, 0, 255);
rspi->speed_hz = DIV_ROUND_UP(clksrc, (2U << brdv) * spbr);
}
rspi_write8(rspi, spbr, RSPI_SPBR);
rspi->spcmd |= SPCMD_BRDV(brdv);
/* Disable dummy transmission, set byte access */
rspi_write8(rspi, 0, RSPI_SPDCR);
@ -686,6 +703,8 @@ static int rspi_common_transfer(struct rspi_data *rspi,
{
int ret;
xfer->effective_speed_hz = rspi->speed_hz;
ret = rspi_dma_check_then_transfer(rspi, xfer);
if (ret != -EAGAIN)
return ret;
@ -841,6 +860,7 @@ static int qspi_transfer_one(struct spi_controller *ctlr,
{
struct rspi_data *rspi = spi_controller_get_devdata(ctlr);
xfer->effective_speed_hz = rspi->speed_hz;
if (spi->mode & SPI_LOOP) {
return qspi_transfer_out_in(rspi, xfer);
} else if (xfer->tx_nbits > SPI_NBITS_SINGLE) {
@ -1163,6 +1183,8 @@ static int rspi_remove(struct platform_device *pdev)
static const struct spi_ops rspi_ops = {
.set_config_register = rspi_set_config_register,
.transfer_one = rspi_transfer_one,
.min_div = 2,
.max_div = 4096,
.flags = SPI_CONTROLLER_MUST_TX,
.fifo_size = 8,
.num_hw_ss = 2,
@ -1171,6 +1193,8 @@ static const struct spi_ops rspi_ops = {
static const struct spi_ops rspi_rz_ops = {
.set_config_register = rspi_rz_set_config_register,
.transfer_one = rspi_rz_transfer_one,
.min_div = 2,
.max_div = 4096,
.flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX,
.fifo_size = 8, /* 8 for TX, 32 for RX */
.num_hw_ss = 1,
@ -1181,6 +1205,8 @@ static const struct spi_ops qspi_ops = {
.transfer_one = qspi_transfer_one,
.extra_mode_bits = SPI_TX_DUAL | SPI_TX_QUAD |
SPI_RX_DUAL | SPI_RX_QUAD,
.min_div = 1,
.max_div = 4080,
.flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX,
.fifo_size = 32,
.num_hw_ss = 1,
@ -1242,6 +1268,7 @@ static int rspi_probe(struct platform_device *pdev)
int ret;
const struct rspi_plat_data *rspi_pd;
const struct spi_ops *ops;
unsigned long clksrc;
ctlr = spi_alloc_master(&pdev->dev, sizeof(struct rspi_data));
if (ctlr == NULL)
@ -1261,13 +1288,6 @@ static int rspi_probe(struct platform_device *pdev)
ctlr->num_chipselect = 2; /* default */
}
/* ops parameter check */
if (!ops->set_config_register) {
dev_err(&pdev->dev, "there is no set_config_register\n");
ret = -ENODEV;
goto error1;
}
rspi = spi_controller_get_devdata(ctlr);
platform_set_drvdata(pdev, rspi);
rspi->ops = ops;
@ -1301,6 +1321,9 @@ static int rspi_probe(struct platform_device *pdev)
ctlr->unprepare_message = rspi_unprepare_message;
ctlr->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST |
SPI_LOOP | ops->extra_mode_bits;
clksrc = clk_get_rate(rspi->clk);
ctlr->min_speed_hz = DIV_ROUND_UP(clksrc, ops->max_div);
ctlr->max_speed_hz = DIV_ROUND_UP(clksrc, ops->min_div);
ctlr->flags = ops->flags;
ctlr->dev.of_node = pdev->dev.of_node;
ctlr->use_gpio_descriptors = true;

2
drivers/spi/spi-s3c24xx.c
Просмотреть файл

@ -28,7 +28,7 @@
#include "spi-s3c24xx-fiq.h"
/**
* s3c24xx_spi_devstate - per device data
* struct s3c24xx_spi_devstate - per device data
* @hz: Last frequency calculated for @sppre field.
* @mode: Last mode setting for the @spcon field.
* @spcon: Value to write to the SPCON register.

111
drivers/spi/spi-s3c64xx.c
Просмотреть файл

@ -29,7 +29,7 @@
#define S3C64XX_SPI_CH_CFG 0x00
#define S3C64XX_SPI_CLK_CFG 0x04
#define S3C64XX_SPI_MODE_CFG 0x08
#define S3C64XX_SPI_SLAVE_SEL 0x0C
#define S3C64XX_SPI_CS_REG 0x0C
#define S3C64XX_SPI_INT_EN 0x10
#define S3C64XX_SPI_STATUS 0x14
#define S3C64XX_SPI_TX_DATA 0x18
@ -64,9 +64,9 @@
#define S3C64XX_SPI_MODE_TXDMA_ON (1<<1)
#define S3C64XX_SPI_MODE_4BURST (1<<0)
#define S3C64XX_SPI_SLAVE_AUTO (1<<1)
#define S3C64XX_SPI_SLAVE_SIG_INACT (1<<0)
#define S3C64XX_SPI_SLAVE_NSC_CNT_2 (2<<4)
#define S3C64XX_SPI_CS_NSC_CNT_2 (2<<4)
#define S3C64XX_SPI_CS_AUTO (1<<1)
#define S3C64XX_SPI_CS_SIG_INACT (1<<0)
#define S3C64XX_SPI_INT_TRAILING_EN (1<<6)
#define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5)
@ -122,6 +122,7 @@
struct s3c64xx_spi_dma_data {
struct dma_chan *ch;
dma_cookie_t cookie;
enum dma_transfer_direction direction;
};
@ -161,11 +162,8 @@ struct s3c64xx_spi_port_config {
* @cntrlr_info: Platform specific data for the controller this driver manages.
* @lock: Controller specific lock.
* @state: Set of FLAGS to indicate status.
* @rx_dmach: Controller's DMA channel for Rx.
* @tx_dmach: Controller's DMA channel for Tx.
* @sfr_start: BUS address of SPI controller regs.
* @regs: Pointer to ioremap'ed controller registers.
* @irq: interrupt
* @xfer_completion: To indicate completion of xfer task.
* @cur_mode: Stores the active configuration of the controller.
* @cur_bpw: Stores the active bits per word settings.
@ -182,7 +180,7 @@ struct s3c64xx_spi_driver_data {
struct clk *ioclk;
struct platform_device *pdev;
struct spi_master *master;
struct s3c64xx_spi_info *cntrlr_info;
struct s3c64xx_spi_info *cntrlr_info;
spinlock_t lock;
unsigned long sfr_start;
struct completion xfer_completion;
@ -271,12 +269,13 @@ static void s3c64xx_spi_dmacb(void *data)
spin_unlock_irqrestore(&sdd->lock, flags);
}
static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
static int prepare_dma(struct s3c64xx_spi_dma_data *dma,
struct sg_table *sgt)
{
struct s3c64xx_spi_driver_data *sdd;
struct dma_slave_config config;
struct dma_async_tx_descriptor *desc;
int ret;
memset(&config, 0, sizeof(config));
@ -300,12 +299,24 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
desc = dmaengine_prep_slave_sg(dma->ch, sgt->sgl, sgt->nents,
dma->direction, DMA_PREP_INTERRUPT);
if (!desc) {
dev_err(&sdd->pdev->dev, "unable to prepare %s scatterlist",
dma->direction == DMA_DEV_TO_MEM ? "rx" : "tx");
return -ENOMEM;
}
desc->callback = s3c64xx_spi_dmacb;
desc->callback_param = dma;
dmaengine_submit(desc);
dma->cookie = dmaengine_submit(desc);
ret = dma_submit_error(dma->cookie);
if (ret) {
dev_err(&sdd->pdev->dev, "DMA submission failed");
return -EIO;
}
dma_async_issue_pending(dma->ch);
return 0;
}
static void s3c64xx_spi_set_cs(struct spi_device *spi, bool enable)
@ -318,18 +329,18 @@ static void s3c64xx_spi_set_cs(struct spi_device *spi, bool enable)
if (enable) {
if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) {
writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
writel(0, sdd->regs + S3C64XX_SPI_CS_REG);
} else {
u32 ssel = readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL);
u32 ssel = readl(sdd->regs + S3C64XX_SPI_CS_REG);
ssel |= (S3C64XX_SPI_SLAVE_AUTO |
S3C64XX_SPI_SLAVE_NSC_CNT_2);
writel(ssel, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
ssel |= (S3C64XX_SPI_CS_AUTO |
S3C64XX_SPI_CS_NSC_CNT_2);
writel(ssel, sdd->regs + S3C64XX_SPI_CS_REG);
}
} else {
if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
writel(S3C64XX_SPI_SLAVE_SIG_INACT,
sdd->regs + S3C64XX_SPI_SLAVE_SEL);
writel(S3C64XX_SPI_CS_SIG_INACT,
sdd->regs + S3C64XX_SPI_CS_REG);
}
}
@ -355,11 +366,12 @@ static bool s3c64xx_spi_can_dma(struct spi_master *master,
return xfer->len > (FIFO_LVL_MASK(sdd) >> 1) + 1;
}
static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd,
static int s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd,
struct spi_transfer *xfer, int dma_mode)
{
void __iomem *regs = sdd->regs;
u32 modecfg, chcfg;
int ret = 0;
modecfg = readl(regs + S3C64XX_SPI_MODE_CFG);
modecfg &= ~(S3C64XX_SPI_MODE_TXDMA_ON | S3C64XX_SPI_MODE_RXDMA_ON);
@ -385,7 +397,7 @@ static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd,
chcfg |= S3C64XX_SPI_CH_TXCH_ON;
if (dma_mode) {
modecfg |= S3C64XX_SPI_MODE_TXDMA_ON;
prepare_dma(&sdd->tx_dma, &xfer->tx_sg);
ret = prepare_dma(&sdd->tx_dma, &xfer->tx_sg);
} else {
switch (sdd->cur_bpw) {
case 32:
@ -417,12 +429,17 @@ static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd,
writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff)
| S3C64XX_SPI_PACKET_CNT_EN,
regs + S3C64XX_SPI_PACKET_CNT);
prepare_dma(&sdd->rx_dma, &xfer->rx_sg);
ret = prepare_dma(&sdd->rx_dma, &xfer->rx_sg);
}
}
if (ret)
return ret;
writel(modecfg, regs + S3C64XX_SPI_MODE_CFG);
writel(chcfg, regs + S3C64XX_SPI_CH_CFG);
return 0;
}
static u32 s3c64xx_spi_wait_for_timeout(struct s3c64xx_spi_driver_data *sdd,
@ -456,7 +473,8 @@ static int s3c64xx_wait_for_dma(struct s3c64xx_spi_driver_data *sdd,
/* millisecs to xfer 'len' bytes @ 'cur_speed' */
ms = xfer->len * 8 * 1000 / sdd->cur_speed;
ms += 10; /* some tolerance */
ms += 30; /* some tolerance */
ms = max(ms, 100); /* minimum timeout */
val = msecs_to_jiffies(ms) + 10;
val = wait_for_completion_timeout(&sdd->xfer_completion, val);
@ -555,9 +573,10 @@ static int s3c64xx_wait_for_pio(struct s3c64xx_spi_driver_data *sdd,
return 0;
}
static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
{
void __iomem *regs = sdd->regs;
int ret;
u32 val;
/* Disable Clock */
@ -605,7 +624,10 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
if (sdd->port_conf->clk_from_cmu) {
/* The src_clk clock is divided internally by 2 */
clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
if (ret)
return ret;
sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2;
} else {
/* Configure Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
@ -619,6 +641,8 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
val |= S3C64XX_SPI_ENCLK_ENABLE;
writel(val, regs + S3C64XX_SPI_CLK_CFG);
}
return 0;
}
#define XFER_DMAADDR_INVALID DMA_BIT_MASK(32)
@ -661,7 +685,9 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
sdd->cur_bpw = bpw;
sdd->cur_speed = speed;
sdd->cur_mode = spi->mode;
s3c64xx_spi_config(sdd);
status = s3c64xx_spi_config(sdd);
if (status)
return status;
}
if (!is_polling(sdd) && (xfer->len > fifo_len) &&
@ -685,13 +711,18 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
sdd->state &= ~RXBUSY;
sdd->state &= ~TXBUSY;
s3c64xx_enable_datapath(sdd, xfer, use_dma);
/* Start the signals */
s3c64xx_spi_set_cs(spi, true);
status = s3c64xx_enable_datapath(sdd, xfer, use_dma);
spin_unlock_irqrestore(&sdd->lock, flags);
if (status) {
dev_err(&spi->dev, "failed to enable data path for transfer: %d\n", status);
break;
}
if (use_dma)
status = s3c64xx_wait_for_dma(sdd, xfer);
else
@ -699,17 +730,28 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
if (status) {
dev_err(&spi->dev,
"I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
"I/O Error: rx-%d tx-%d rx-%c tx-%c len-%d dma-%d res-(%d)\n",
xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
(sdd->state & RXBUSY) ? 'f' : 'p',
(sdd->state & TXBUSY) ? 'f' : 'p',
xfer->len);
xfer->len, use_dma ? 1 : 0, status);
if (use_dma) {
if (xfer->tx_buf && (sdd->state & TXBUSY))
struct dma_tx_state s;
if (xfer->tx_buf && (sdd->state & TXBUSY)) {
dmaengine_pause(sdd->tx_dma.ch);
dmaengine_tx_status(sdd->tx_dma.ch, sdd->tx_dma.cookie, &s);
dmaengine_terminate_all(sdd->tx_dma.ch);
if (xfer->rx_buf && (sdd->state & RXBUSY))
dev_err(&spi->dev, "TX residue: %d\n", s.residue);
}
if (xfer->rx_buf && (sdd->state & RXBUSY)) {
dmaengine_pause(sdd->rx_dma.ch);
dmaengine_tx_status(sdd->rx_dma.ch, sdd->rx_dma.cookie, &s);
dmaengine_terminate_all(sdd->rx_dma.ch);
dev_err(&spi->dev, "RX residue: %d\n", s.residue);
}
}
} else {
s3c64xx_flush_fifo(sdd);
@ -939,9 +981,9 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd)
sdd->cur_speed = 0;
if (sci->no_cs)
writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
writel(0, sdd->regs + S3C64XX_SPI_CS_REG);
else if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
writel(S3C64XX_SPI_CS_SIG_INACT, sdd->regs + S3C64XX_SPI_CS_REG);
/* Disable Interrupts - we use Polling if not DMA mode */
writel(0, regs + S3C64XX_SPI_INT_EN);
@ -1336,6 +1378,10 @@ static int s3c64xx_spi_runtime_resume(struct device *dev)
s3c64xx_spi_hwinit(sdd);
writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN |
S3C64XX_SPI_INT_TX_OVERRUN_EN | S3C64XX_SPI_INT_TX_UNDERRUN_EN,
sdd->regs + S3C64XX_SPI_INT_EN);
return 0;
err_disable_src_clk:
@ -1379,6 +1425,7 @@ static struct s3c64xx_spi_port_config exynos4_spi_port_config = {
.tx_st_done = 25,
.high_speed = true,
.clk_from_cmu = true,
.quirks = S3C64XX_SPI_QUIRK_CS_AUTO,
};
static struct s3c64xx_spi_port_config exynos7_spi_port_config = {

5
drivers/spi/spi-sprd-adi.c
Просмотреть файл

@ -504,10 +504,7 @@ static int sprd_adi_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "no hardware spinlock supplied\n");
break;
default:
dev_err(&pdev->dev,
"failed to find hwlock id, %d\n", ret);
fallthrough;
case -EPROBE_DEFER:
dev_err_probe(&pdev->dev, ret, "failed to find hwlock id\n");
goto put_ctlr;
}
}

17
drivers/spi/spi-sprd.c
Просмотреть файл

@ -553,22 +553,15 @@ static int sprd_spi_dma_tx_config(struct sprd_spi *ss, struct spi_transfer *t)
static int sprd_spi_dma_request(struct sprd_spi *ss)
{
ss->dma.dma_chan[SPRD_SPI_RX] = dma_request_chan(ss->dev, "rx_chn");
if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_RX])) {
if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]) == -EPROBE_DEFER)
return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]);
dev_err(ss->dev, "request RX DMA channel failed!\n");
return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]);
}
if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_RX]))
return dev_err_probe(ss->dev, PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]),
"request RX DMA channel failed!\n");
ss->dma.dma_chan[SPRD_SPI_TX] = dma_request_chan(ss->dev, "tx_chn");
if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_TX])) {
if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]) == -EPROBE_DEFER)
return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
dev_err(ss->dev, "request TX DMA channel failed!\n");
dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]);
return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
return dev_err_probe(ss->dev, PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]),
"request TX DMA channel failed!\n");
}
return 0;

13
drivers/spi/spi-stm32.c
Просмотреть файл

@ -804,10 +804,9 @@ static irqreturn_t stm32f4_spi_irq_event(int irq, void *dev_id)
struct spi_master *master = dev_id;
struct stm32_spi *spi = spi_master_get_devdata(master);
u32 sr, mask = 0;
unsigned long flags;
bool end = false;
spin_lock_irqsave(&spi->lock, flags);
spin_lock(&spi->lock);
sr = readl_relaxed(spi->base + STM32F4_SPI_SR);
/*
@ -833,7 +832,7 @@ static irqreturn_t stm32f4_spi_irq_event(int irq, void *dev_id)
if (!(sr & mask)) {
dev_dbg(spi->dev, "spurious IT (sr=0x%08x)\n", sr);
spin_unlock_irqrestore(&spi->lock, flags);
spin_unlock(&spi->lock);
return IRQ_NONE;
}
@ -875,11 +874,11 @@ end_irq:
STM32F4_SPI_CR2_TXEIE |
STM32F4_SPI_CR2_RXNEIE |
STM32F4_SPI_CR2_ERRIE);
spin_unlock_irqrestore(&spi->lock, flags);
spin_unlock(&spi->lock);
return IRQ_WAKE_THREAD;
}
spin_unlock_irqrestore(&spi->lock, flags);
spin_unlock(&spi->lock);
return IRQ_HANDLED;
}
@ -1861,9 +1860,7 @@ static int stm32_spi_probe(struct platform_device *pdev)
spi->irq = platform_get_irq(pdev, 0);
if (spi->irq <= 0) {
ret = spi->irq;
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "failed to get irq: %d\n", ret);
ret = dev_err_probe(&pdev->dev, spi->irq, "failed to get irq\n");
goto err_master_put;
}
ret = devm_request_threaded_irq(&pdev->dev, spi->irq,

5
drivers/spi/spi-synquacer.c
Просмотреть файл

@ -640,9 +640,8 @@ static int synquacer_spi_probe(struct platform_device *pdev)
}
if (IS_ERR(sspi->clk)) {
if (!(PTR_ERR(sspi->clk) == -EPROBE_DEFER))
dev_err(&pdev->dev, "clock not found\n");
ret = PTR_ERR(sspi->clk);
ret = dev_err_probe(&pdev->dev, PTR_ERR(sspi->clk),
"clock not found\n");
goto put_spi;
}

11
drivers/spi/spi-tegra114.c
Просмотреть файл

@ -664,16 +664,11 @@ static int tegra_spi_init_dma_param(struct tegra_spi_data *tspi,
struct dma_chan *dma_chan;
u32 *dma_buf;
dma_addr_t dma_phys;
int ret;
dma_chan = dma_request_chan(tspi->dev, dma_to_memory ? "rx" : "tx");
if (IS_ERR(dma_chan)) {
ret = PTR_ERR(dma_chan);
if (ret != -EPROBE_DEFER)
dev_err(tspi->dev,
"Dma channel is not available: %d\n", ret);
return ret;
}
if (IS_ERR(dma_chan))
return dev_err_probe(tspi->dev, PTR_ERR(dma_chan),
"Dma channel is not available\n");
dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size,
&dma_phys, GFP_KERNEL);

5
drivers/spi/spi-tegra20-sflash.c
Просмотреть файл

@ -359,9 +359,8 @@ exit:
static irqreturn_t handle_cpu_based_xfer(struct tegra_sflash_data *tsd)
{
struct spi_transfer *t = tsd->curr_xfer;
unsigned long flags;
spin_lock_irqsave(&tsd->lock, flags);
spin_lock(&tsd->lock);
if (tsd->tx_status || tsd->rx_status || (tsd->status_reg & SPI_BSY)) {
dev_err(tsd->dev,
"CpuXfer ERROR bit set 0x%x\n", tsd->status_reg);
@ -391,7 +390,7 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_sflash_data *tsd)
tegra_sflash_calculate_curr_xfer_param(tsd->cur_spi, tsd, t);
tegra_sflash_start_cpu_based_transfer(tsd, t);
exit:
spin_unlock_irqrestore(&tsd->lock, flags);
spin_unlock(&tsd->lock);
return IRQ_HANDLED;
}

10
drivers/spi/spi-tegra20-slink.c
Просмотреть файл

@ -600,13 +600,9 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi,
struct dma_slave_config dma_sconfig;
dma_chan = dma_request_chan(tspi->dev, dma_to_memory ? "rx" : "tx");
if (IS_ERR(dma_chan)) {
ret = PTR_ERR(dma_chan);
if (ret != -EPROBE_DEFER)
dev_err(tspi->dev,
"Dma channel is not available: %d\n", ret);
return ret;
}
if (IS_ERR(dma_chan))
return dev_err_probe(tspi->dev, PTR_ERR(dma_chan),
"Dma channel is not available\n");
dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size,
&dma_phys, GFP_KERNEL);

4
drivers/spi/spi-topcliff-pch.c
Просмотреть файл

@ -1002,7 +1002,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
spin_unlock_irqrestore(&data->lock, flags);
/* RX */
dma->sg_rx_p = kcalloc(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC);
dma->sg_rx_p = kmalloc_array(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC);
if (!dma->sg_rx_p)
return;
@ -1065,7 +1065,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
head = 0;
}
dma->sg_tx_p = kcalloc(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC);
dma->sg_tx_p = kmalloc_array(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC);
if (!dma->sg_tx_p)
return;

3
drivers/spi/spi-xilinx.c
Просмотреть файл

@ -491,8 +491,7 @@ static int xilinx_spi_probe(struct platform_device *pdev)
goto put_master;
}
dev_info(&pdev->dev, "at 0x%08llX mapped to 0x%p, irq=%d\n",
(unsigned long long)res->start, xspi->regs, xspi->irq);
dev_info(&pdev->dev, "at %pR, irq=%d\n", res, xspi->irq);
if (pdata) {
for (i = 0; i < pdata->num_devices; i++)

920
drivers/spi/spi-zynqmp-gqspi.c
Просмотреть файл

Разница между файлами не показана из-за своего большого размера Загрузить разницу

4
drivers/spi/spidev.c
Просмотреть файл

@ -146,7 +146,7 @@ static ssize_t
spidev_read(struct file *filp, char __user *buf, size_t count, loff_t *f_pos)
{
struct spidev_data *spidev;
ssize_t status = 0;
ssize_t status;
/* chipselect only toggles at start or end of operation */
if (count > bufsiz)
@ -176,7 +176,7 @@ spidev_write(struct file *filp, const char __user *buf,
size_t count, loff_t *f_pos)
{
struct spidev_data *spidev;
ssize_t status = 0;
ssize_t status;
unsigned long missing;
/* chipselect only toggles at start or end of operation */

159
include/linux/pxa2xx_ssp.h
Просмотреть файл

@ -1,7 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* pxa2xx_ssp.h
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
*
* This driver supports the following PXA CPU/SSP ports:-
@ -16,10 +14,16 @@
#ifndef __LINUX_SSP_H
#define __LINUX_SSP_H
#include <linux/list.h>
#include <linux/bits.h>
#include <linux/compiler_types.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/kconfig.h>
#include <linux/list.h>
#include <linux/types.h>
struct clk;
struct device;
struct device_node;
/*
* SSP Serial Port Registers
@ -43,130 +47,127 @@
#define SSACDD (0x40) /* SSP Audio Clock Dither Divider */
/* Common PXA2xx bits first */
#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */
#define SSCR0_DSS GENMASK(3, 0) /* Data Size Select (mask) */
#define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */
#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */
#define SSCR0_FRF GENMASK(5, 4) /* FRame Format (mask) */
#define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial Peripheral Interface (SPI) */
#define SSCR0_TI (0x1 << 4) /* Texas Instruments' Synchronous Serial Protocol (SSP) */
#define SSCR0_National (0x2 << 4) /* National Microwire */
#define SSCR0_ECS (1 << 6) /* External clock select */
#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */
#define SSCR0_ECS BIT(6) /* External clock select */
#define SSCR0_SSE BIT(7) /* Synchronous Serial Port Enable */
#define SSCR0_SCR(x) ((x) << 8) /* Serial Clock Rate (mask) */
/* PXA27x, PXA3xx */
#define SSCR0_EDSS (1 << 20) /* Extended data size select */
#define SSCR0_NCS (1 << 21) /* Network clock select */
#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun interrupt mask */
#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun interrupt mask */
#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */
#define SSCR0_EDSS BIT(20) /* Extended data size select */
#define SSCR0_NCS BIT(21) /* Network clock select */
#define SSCR0_RIM BIT(22) /* Receive FIFO overrrun interrupt mask */
#define SSCR0_TUM BIT(23) /* Transmit FIFO underrun interrupt mask */
#define SSCR0_FRDC GENMASK(26, 24) /* Frame rate divider control (mask) */
#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) /* Time slots per frame [1..8] */
#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */
#define SSCR0_ACS (1 << 30) /* Audio clock select */
#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */
#define SSCR0_FPCKE BIT(29) /* FIFO packing enable */
#define SSCR0_ACS BIT(30) /* Audio clock select */
#define SSCR0_MOD BIT(31) /* Mode (normal or network) */
#define SSCR1_RIE BIT(0) /* Receive FIFO Interrupt Enable */
#define SSCR1_TIE BIT(1) /* Transmit FIFO Interrupt Enable */
#define SSCR1_LBM BIT(2) /* Loop-Back Mode */
#define SSCR1_SPO BIT(3) /* Motorola SPI SSPSCLK polarity setting */
#define SSCR1_SPH BIT(4) /* Motorola SPI SSPSCLK phase setting */
#define SSCR1_MWDS BIT(5) /* Microwire Transmit Data Size */
#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */
#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */
#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */
#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK polarity setting */
#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */
#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */
#define SSSR_ALT_FRM_MASK 3 /* Masks the SFRM signal number */
#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */
#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */
#define SSSR_BSY (1 << 4) /* SSP Busy */
#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */
#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */
#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */
#define SSSR_ALT_FRM_MASK GENMASK(1, 0) /* Masks the SFRM signal number */
#define SSSR_TNF BIT(2) /* Transmit FIFO Not Full */
#define SSSR_RNE BIT(3) /* Receive FIFO Not Empty */
#define SSSR_BSY BIT(4) /* SSP Busy */
#define SSSR_TFS BIT(5) /* Transmit FIFO Service Request */
#define SSSR_RFS BIT(6) /* Receive FIFO Service Request */
#define SSSR_ROR BIT(7) /* Receive FIFO Overrun */
#define RX_THRESH_DFLT 8
#define TX_THRESH_DFLT 8
#define SSSR_TFL_MASK (0xf << 8) /* Transmit FIFO Level mask */
#define SSSR_RFL_MASK (0xf << 12) /* Receive FIFO Level mask */
#define SSSR_TFL_MASK GENMASK(11, 8) /* Transmit FIFO Level mask */
#define SSSR_RFL_MASK GENMASK(15, 12) /* Receive FIFO Level mask */
#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */
#define SSCR1_TFT GENMASK(9, 6) /* Transmit FIFO Threshold (mask) */
#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */
#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */
#define SSCR1_RFT GENMASK(13, 10) /* Receive FIFO Threshold (mask) */
#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */
#define RX_THRESH_CE4100_DFLT 2
#define TX_THRESH_CE4100_DFLT 2
#define CE4100_SSSR_TFL_MASK (0x3 << 8) /* Transmit FIFO Level mask */
#define CE4100_SSSR_RFL_MASK (0x3 << 12) /* Receive FIFO Level mask */
#define CE4100_SSSR_TFL_MASK GENMASK(9, 8) /* Transmit FIFO Level mask */
#define CE4100_SSSR_RFL_MASK GENMASK(13, 12) /* Receive FIFO Level mask */
#define CE4100_SSCR1_TFT (0x000000c0) /* Transmit FIFO Threshold (mask) */
#define CE4100_SSCR1_TFT GENMASK(7, 6) /* Transmit FIFO Threshold (mask) */
#define CE4100_SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..4] */
#define CE4100_SSCR1_RFT (0x00000c00) /* Receive FIFO Threshold (mask) */
#define CE4100_SSCR1_RFT GENMASK(11, 10) /* Receive FIFO Threshold (mask) */
#define CE4100_SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */
/* QUARK_X1000 SSCR0 bit definition */
#define QUARK_X1000_SSCR0_DSS (0x1F << 0) /* Data Size Select (mask) */
#define QUARK_X1000_SSCR0_DSS GENMASK(4, 0) /* Data Size Select (mask) */
#define QUARK_X1000_SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..32] */
#define QUARK_X1000_SSCR0_FRF (0x3 << 5) /* FRame Format (mask) */
#define QUARK_X1000_SSCR0_FRF GENMASK(6, 5) /* FRame Format (mask) */
#define QUARK_X1000_SSCR0_Motorola (0x0 << 5) /* Motorola's Serial Peripheral Interface (SPI) */
#define RX_THRESH_QUARK_X1000_DFLT 1
#define TX_THRESH_QUARK_X1000_DFLT 16
#define QUARK_X1000_SSSR_TFL_MASK (0x1F << 8) /* Transmit FIFO Level mask */
#define QUARK_X1000_SSSR_RFL_MASK (0x1F << 13) /* Receive FIFO Level mask */
#define QUARK_X1000_SSSR_TFL_MASK GENMASK(12, 8) /* Transmit FIFO Level mask */
#define QUARK_X1000_SSSR_RFL_MASK GENMASK(17, 13) /* Receive FIFO Level mask */
#define QUARK_X1000_SSCR1_TFT (0x1F << 6) /* Transmit FIFO Threshold (mask) */
#define QUARK_X1000_SSCR1_TFT GENMASK(10, 6) /* Transmit FIFO Threshold (mask) */
#define QUARK_X1000_SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..32] */
#define QUARK_X1000_SSCR1_RFT (0x1F << 11) /* Receive FIFO Threshold (mask) */
#define QUARK_X1000_SSCR1_RFT GENMASK(15, 11) /* Receive FIFO Threshold (mask) */
#define QUARK_X1000_SSCR1_RxTresh(x) (((x) - 1) << 11) /* level [1..32] */
#define QUARK_X1000_SSCR1_STRF (1 << 17) /* Select FIFO or EFWR */
#define QUARK_X1000_SSCR1_EFWR (1 << 16) /* Enable FIFO Write/Read */
#define QUARK_X1000_SSCR1_EFWR BIT(16) /* Enable FIFO Write/Read */
#define QUARK_X1000_SSCR1_STRF BIT(17) /* Select FIFO or EFWR */
/* extra bits in PXA255, PXA26x and PXA27x SSP ports */
#define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */
#define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */
#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */
#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */
#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */
#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */
#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */
#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */
#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */
#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */
#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */
#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */
#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */
#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */
#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */
#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing Byte Interrupt Enable */
#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */
#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */
#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */
#define SSSR_BCE (1 << 23) /* Bit Count Error */
#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */
#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */
#define SSSR_EOC (1 << 20) /* End Of Chain */
#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */
#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */
#define SSCR1_EFWR BIT(14) /* Enable FIFO Write/Read */
#define SSCR1_STRF BIT(15) /* Select FIFO or EFWR */
#define SSCR1_IFS BIT(16) /* Invert Frame Signal */
#define SSCR1_PINTE BIT(18) /* Peripheral Trailing Byte Interrupt Enable */
#define SSCR1_TINTE BIT(19) /* Receiver Time-out Interrupt enable */
#define SSCR1_RSRE BIT(20) /* Receive Service Request Enable */
#define SSCR1_TSRE BIT(21) /* Transmit Service Request Enable */
#define SSCR1_TRAIL BIT(22) /* Trailing Byte */
#define SSCR1_RWOT BIT(23) /* Receive Without Transmit */
#define SSCR1_SFRMDIR BIT(24) /* Frame Direction */
#define SSCR1_SCLKDIR BIT(25) /* Serial Bit Rate Clock Direction */
#define SSCR1_ECRB BIT(26) /* Enable Clock request B */
#define SSCR1_ECRA BIT(27) /* Enable Clock Request A */
#define SSCR1_SCFR BIT(28) /* Slave Clock free Running */
#define SSCR1_EBCEI BIT(29) /* Enable Bit Count Error interrupt */
#define SSCR1_TTE BIT(30) /* TXD Tristate Enable */
#define SSCR1_TTELP BIT(31) /* TXD Tristate Enable Last Phase */
#define SSSR_PINT BIT(18) /* Peripheral Trailing Byte Interrupt */
#define SSSR_TINT BIT(19) /* Receiver Time-out Interrupt */
#define SSSR_EOC BIT(20) /* End Of Chain */
#define SSSR_TUR BIT(21) /* Transmit FIFO Under Run */
#define SSSR_CSS BIT(22) /* Clock Synchronisation Status */
#define SSSR_BCE BIT(23) /* Bit Count Error */
#define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */
#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */
#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */
#define SSPSP_SFRMP BIT(2) /* Serial Frame Polarity */
#define SSPSP_ETDS BIT(3) /* End of Transfer data State */
#define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */
#define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */
#define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */
#define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */
#define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */
#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */
#define SSPSP_FSRT BIT(25) /* Frame Sync Relative Timing */
/* PXA3xx */
#define SSPSP_EDMYSTRT(x) ((x) << 26) /* Extended Dummy Start */
#define SSPSP_EDMYSTOP(x) ((x) << 28) /* Extended Dummy Stop */
#define SSPSP_TIMING_MASK (0x7f8001f0)
#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */
#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */
#define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */
#define SSACD_ACDS_1 (0)
#define SSACD_ACDS_2 (1)
@ -174,18 +175,24 @@
#define SSACD_ACDS_8 (3)
#define SSACD_ACDS_16 (4)
#define SSACD_ACDS_32 (5)
#define SSACD_SCDB BIT(3) /* SSPSYSCLK Divider Bypass */
#define SSACD_SCDB_4X (0)
#define SSACD_SCDB_1X (1)
#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */
#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */
#define SSACD_SCDX8 BIT(7) /* SYSCLK division ratio select */
/* LPSS SSP */
#define SSITF 0x44 /* TX FIFO trigger level */
#define SSITF_TxHiThresh(x) (((x) - 1) << 0)
#define SSITF_TxLoThresh(x) (((x) - 1) << 8)
#define SSITF_TxHiThresh(x) ((x) - 1)
#define SSIRF 0x48 /* RX FIFO trigger level */
#define SSIRF_RxThresh(x) ((x) - 1)
/* LPT/WPT SSP */
#define SSCR2 (0x40) /* SSP Command / Status 2 */
#define SSPSP2 (0x44) /* SSP Programmable Serial Protocol 2 */
enum pxa_ssp_type {
SSP_UNDEFINED = 0,
PXA25x_SSP, /* pxa 210, 250, 255, 26x */