mtd: rawnand: Remove the cmx270 NAND controller driver

The CM-X270 board has been removed, we can remove the custom NAND
driver as well.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200518163300.304732-1-boris.brezillon@collabora.com
This commit is contained in:
Boris Brezillon 2020-05-18 18:33:00 +02:00 коммит произвёл Miquel Raynal
Родитель e45a4b652d
Коммит 767727b927
3 изменённых файлов: 0 добавлений и 241 удалений

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@ -213,10 +213,6 @@ config MTD_NAND_MLC_LPC32XX
Please check the actual NAND chip connected and its support Please check the actual NAND chip connected and its support
by the MLC NAND controller. by the MLC NAND controller.
config MTD_NAND_CM_X270
tristate "CM-X270 modules NAND controller"
depends on MACH_ARMCORE
config MTD_NAND_PASEMI config MTD_NAND_PASEMI
tristate "PA Semi PWRficient NAND controller" tristate "PA Semi PWRficient NAND controller"
depends on PPC_PASEMI depends on PPC_PASEMI

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@ -25,7 +25,6 @@ obj-$(CONFIG_MTD_NAND_GPIO) += gpio.o
omap2_nand-objs := omap2.o omap2_nand-objs := omap2.o
obj-$(CONFIG_MTD_NAND_OMAP2) += omap2_nand.o obj-$(CONFIG_MTD_NAND_OMAP2) += omap2_nand.o
obj-$(CONFIG_MTD_NAND_OMAP_BCH_BUILD) += omap_elm.o obj-$(CONFIG_MTD_NAND_OMAP_BCH_BUILD) += omap_elm.o
obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o
obj-$(CONFIG_MTD_NAND_MARVELL) += marvell_nand.o obj-$(CONFIG_MTD_NAND_MARVELL) += marvell_nand.o
obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o
obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o

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@ -1,236 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2006 Compulab, Ltd.
* Mike Rapoport <mike@compulab.co.il>
*
* Derived from drivers/mtd/nand/h1910.c (removed in v3.10)
* Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
* Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
*
* Overview:
* This is a device driver for the NAND flash device found on the
* CM-X270 board.
*/
#include <linux/mtd/rawnand.h>
#include <linux/mtd/partitions.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <mach/pxa2xx-regs.h>
#define GPIO_NAND_CS (11)
#define GPIO_NAND_RB (89)
/* MTD structure for CM-X270 board */
static struct mtd_info *cmx270_nand_mtd;
/* remaped IO address of the device */
static void __iomem *cmx270_nand_io;
/*
* Define static partitions for flash device
*/
static const struct mtd_partition partition_info[] = {
[0] = {
.name = "cmx270-0",
.offset = 0,
.size = MTDPART_SIZ_FULL
}
};
#define NUM_PARTITIONS (ARRAY_SIZE(partition_info))
static u_char cmx270_read_byte(struct nand_chip *this)
{
return (readl(this->legacy.IO_ADDR_R) >> 16);
}
static void cmx270_write_buf(struct nand_chip *this, const u_char *buf,
int len)
{
int i;
for (i=0; i<len; i++)
writel((*buf++ << 16), this->legacy.IO_ADDR_W);
}
static void cmx270_read_buf(struct nand_chip *this, u_char *buf, int len)
{
int i;
for (i=0; i<len; i++)
*buf++ = readl(this->legacy.IO_ADDR_R) >> 16;
}
static inline void nand_cs_on(void)
{
gpio_set_value(GPIO_NAND_CS, 0);
}
static void nand_cs_off(void)
{
dsb();
gpio_set_value(GPIO_NAND_CS, 1);
}
/*
* hardware specific access to control-lines
*/
static void cmx270_hwcontrol(struct nand_chip *this, int dat,
unsigned int ctrl)
{
unsigned int nandaddr = (unsigned int)this->legacy.IO_ADDR_W;
dsb();
if (ctrl & NAND_CTRL_CHANGE) {
if ( ctrl & NAND_ALE )
nandaddr |= (1 << 3);
else
nandaddr &= ~(1 << 3);
if ( ctrl & NAND_CLE )
nandaddr |= (1 << 2);
else
nandaddr &= ~(1 << 2);
if ( ctrl & NAND_NCE )
nand_cs_on();
else
nand_cs_off();
}
dsb();
this->legacy.IO_ADDR_W = (void __iomem*)nandaddr;
if (dat != NAND_CMD_NONE)
writel((dat << 16), this->legacy.IO_ADDR_W);
dsb();
}
/*
* read device ready pin
*/
static int cmx270_device_ready(struct nand_chip *this)
{
dsb();
return (gpio_get_value(GPIO_NAND_RB));
}
/*
* Main initialization routine
*/
static int __init cmx270_init(void)
{
struct nand_chip *this;
int ret;
if (!(machine_is_armcore() && cpu_is_pxa27x()))
return -ENODEV;
ret = gpio_request(GPIO_NAND_CS, "NAND CS");
if (ret) {
pr_warn("CM-X270: failed to request NAND CS gpio\n");
return ret;
}
gpio_direction_output(GPIO_NAND_CS, 1);
ret = gpio_request(GPIO_NAND_RB, "NAND R/B");
if (ret) {
pr_warn("CM-X270: failed to request NAND R/B gpio\n");
goto err_gpio_request;
}
gpio_direction_input(GPIO_NAND_RB);
/* Allocate memory for MTD device structure and private data */
this = kzalloc(sizeof(struct nand_chip), GFP_KERNEL);
if (!this) {
ret = -ENOMEM;
goto err_kzalloc;
}
cmx270_nand_io = ioremap(PXA_CS1_PHYS, 12);
if (!cmx270_nand_io) {
pr_debug("Unable to ioremap NAND device\n");
ret = -EINVAL;
goto err_ioremap;
}
cmx270_nand_mtd = nand_to_mtd(this);
/* Link the private data with the MTD structure */
cmx270_nand_mtd->owner = THIS_MODULE;
/* insert callbacks */
this->legacy.IO_ADDR_R = cmx270_nand_io;
this->legacy.IO_ADDR_W = cmx270_nand_io;
this->legacy.cmd_ctrl = cmx270_hwcontrol;
this->legacy.dev_ready = cmx270_device_ready;
/* 15 us command delay time */
this->legacy.chip_delay = 20;
this->ecc.mode = NAND_ECC_SOFT;
this->ecc.algo = NAND_ECC_HAMMING;
/* read/write functions */
this->legacy.read_byte = cmx270_read_byte;
this->legacy.read_buf = cmx270_read_buf;
this->legacy.write_buf = cmx270_write_buf;
/* Scan to find existence of the device */
ret = nand_scan(this, 1);
if (ret) {
pr_notice("No NAND device\n");
goto err_scan;
}
/* Register the partitions */
ret = mtd_device_register(cmx270_nand_mtd, partition_info,
NUM_PARTITIONS);
if (ret)
goto err_scan;
/* Return happy */
return 0;
err_scan:
iounmap(cmx270_nand_io);
err_ioremap:
kfree(this);
err_kzalloc:
gpio_free(GPIO_NAND_RB);
err_gpio_request:
gpio_free(GPIO_NAND_CS);
return ret;
}
module_init(cmx270_init);
/*
* Clean up routine
*/
static void __exit cmx270_cleanup(void)
{
/* Release resources, unregister device */
nand_release(mtd_to_nand(cmx270_nand_mtd));
gpio_free(GPIO_NAND_RB);
gpio_free(GPIO_NAND_CS);
iounmap(cmx270_nand_io);
kfree(mtd_to_nand(cmx270_nand_mtd));
}
module_exit(cmx270_cleanup);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
MODULE_DESCRIPTION("NAND flash driver for Compulab CM-X270 Module");