ahci: st: Add support for ST's SATA IP
Acked-by: Alexandre Torgue <alexandre.torgue@st.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Родитель
e853a4e01f
Коммит
76884cb2f7
|
@ -97,6 +97,15 @@ config SATA_AHCI_PLATFORM
|
|||
|
||||
If unsure, say N.
|
||||
|
||||
config SATA_AHCI_ST
|
||||
tristate "ST SATA support"
|
||||
depends on SATA_AHCI_PLATFORM
|
||||
select GENERIC_PHY
|
||||
help
|
||||
This option enables support for ST SATA controller.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config AHCI_IMX
|
||||
tristate "Freescale i.MX AHCI SATA support"
|
||||
depends on SATA_AHCI_PLATFORM && MFD_SYSCON
|
||||
|
|
|
@ -5,6 +5,7 @@ obj-$(CONFIG_ATA) += libata.o
|
|||
obj-$(CONFIG_SATA_AHCI) += ahci.o libahci.o
|
||||
obj-$(CONFIG_SATA_ACARD_AHCI) += acard-ahci.o libahci.o
|
||||
obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o
|
||||
obj-$(CONFIG_SATA_AHCI_ST) += ahci_st.o
|
||||
obj-$(CONFIG_SATA_FSL) += sata_fsl.o
|
||||
obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
|
||||
obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
|
||||
|
|
|
@ -0,0 +1,239 @@
|
|||
/*
|
||||
* Copyright (C) 2012 STMicroelectronics Limited
|
||||
*
|
||||
* Authors: Francesco Virlinzi <francesco.virlinzi@st.com>
|
||||
* Alexandre Torgue <alexandre.torgue@st.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/ahci_platform.h>
|
||||
#include <linux/phy/phy.h>
|
||||
#include <linux/libata.h>
|
||||
#include <linux/reset.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#include "ahci.h"
|
||||
|
||||
#define ST_AHCI_OOBR 0xbc
|
||||
#define ST_AHCI_OOBR_WE BIT(31)
|
||||
#define ST_AHCI_OOBR_CWMIN_SHIFT 24
|
||||
#define ST_AHCI_OOBR_CWMAX_SHIFT 16
|
||||
#define ST_AHCI_OOBR_CIMIN_SHIFT 8
|
||||
#define ST_AHCI_OOBR_CIMAX_SHIFT 0
|
||||
|
||||
struct st_ahci_drv_data {
|
||||
struct platform_device *ahci;
|
||||
struct phy *phy;
|
||||
struct reset_control *pwr;
|
||||
struct reset_control *sw_rst;
|
||||
struct reset_control *pwr_rst;
|
||||
struct ahci_host_priv *hpriv;
|
||||
};
|
||||
|
||||
static void st_ahci_configure_oob(void __iomem *mmio)
|
||||
{
|
||||
unsigned long old_val, new_val;
|
||||
|
||||
new_val = (0x02 << ST_AHCI_OOBR_CWMIN_SHIFT) |
|
||||
(0x04 << ST_AHCI_OOBR_CWMAX_SHIFT) |
|
||||
(0x08 << ST_AHCI_OOBR_CIMIN_SHIFT) |
|
||||
(0x0C << ST_AHCI_OOBR_CIMAX_SHIFT);
|
||||
|
||||
old_val = readl(mmio + ST_AHCI_OOBR);
|
||||
writel(old_val | ST_AHCI_OOBR_WE, mmio + ST_AHCI_OOBR);
|
||||
writel(new_val | ST_AHCI_OOBR_WE, mmio + ST_AHCI_OOBR);
|
||||
writel(new_val, mmio + ST_AHCI_OOBR);
|
||||
}
|
||||
|
||||
static int st_ahci_deassert_resets(struct device *dev)
|
||||
{
|
||||
struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
|
||||
int err;
|
||||
|
||||
if (drv_data->pwr) {
|
||||
err = reset_control_deassert(drv_data->pwr);
|
||||
if (err) {
|
||||
dev_err(dev, "unable to bring out of pwrdwn\n");
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
st_ahci_configure_oob(drv_data->hpriv->mmio);
|
||||
|
||||
if (drv_data->sw_rst) {
|
||||
err = reset_control_deassert(drv_data->sw_rst);
|
||||
if (err) {
|
||||
dev_err(dev, "unable to bring out of sw-rst\n");
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
if (drv_data->pwr_rst) {
|
||||
err = reset_control_deassert(drv_data->pwr_rst);
|
||||
if (err) {
|
||||
dev_err(dev, "unable to bring out of pwr-rst\n");
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int st_ahci_probe_resets(struct platform_device *pdev)
|
||||
{
|
||||
struct st_ahci_drv_data *drv_data = platform_get_drvdata(pdev);
|
||||
|
||||
drv_data->pwr = devm_reset_control_get(&pdev->dev, "pwr-dwn");
|
||||
if (IS_ERR(drv_data->pwr)) {
|
||||
dev_info(&pdev->dev, "power reset control not defined\n");
|
||||
drv_data->pwr = NULL;
|
||||
}
|
||||
|
||||
drv_data->sw_rst = devm_reset_control_get(&pdev->dev, "sw-rst");
|
||||
if (IS_ERR(drv_data->sw_rst)) {
|
||||
dev_info(&pdev->dev, "soft reset control not defined\n");
|
||||
drv_data->sw_rst = NULL;
|
||||
}
|
||||
|
||||
drv_data->pwr_rst = devm_reset_control_get(&pdev->dev, "pwr-rst");
|
||||
if (IS_ERR(drv_data->pwr_rst)) {
|
||||
dev_dbg(&pdev->dev, "power soft reset control not defined\n");
|
||||
drv_data->pwr_rst = NULL;
|
||||
}
|
||||
|
||||
return st_ahci_deassert_resets(&pdev->dev);
|
||||
}
|
||||
|
||||
static const struct ata_port_info st_ahci_port_info = {
|
||||
.flags = AHCI_FLAG_COMMON,
|
||||
.pio_mask = ATA_PIO4,
|
||||
.udma_mask = ATA_UDMA6,
|
||||
.port_ops = &ahci_platform_ops,
|
||||
};
|
||||
|
||||
static int st_ahci_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct st_ahci_drv_data *drv_data;
|
||||
struct ahci_host_priv *hpriv;
|
||||
int err;
|
||||
|
||||
drv_data = devm_kzalloc(&pdev->dev, sizeof(*drv_data), GFP_KERNEL);
|
||||
if (!drv_data)
|
||||
return -ENOMEM;
|
||||
|
||||
platform_set_drvdata(pdev, drv_data);
|
||||
|
||||
hpriv = ahci_platform_get_resources(pdev);
|
||||
if (IS_ERR(hpriv))
|
||||
return PTR_ERR(hpriv);
|
||||
|
||||
drv_data->hpriv = hpriv;
|
||||
|
||||
err = st_ahci_probe_resets(pdev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = ahci_platform_enable_resources(hpriv);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info, 0, 0);
|
||||
if (err) {
|
||||
ahci_platform_disable_resources(hpriv);
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int st_ahci_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct st_ahci_drv_data *drv_data = platform_get_drvdata(pdev);
|
||||
struct ahci_host_priv *hpriv = drv_data->hpriv;
|
||||
int err;
|
||||
|
||||
if (drv_data->pwr) {
|
||||
err = reset_control_assert(drv_data->pwr);
|
||||
if (err)
|
||||
dev_err(&pdev->dev, "unable to pwrdwn\n");
|
||||
}
|
||||
|
||||
ahci_platform_disable_resources(hpriv);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int st_ahci_suspend(struct device *dev)
|
||||
{
|
||||
struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
|
||||
struct ahci_host_priv *hpriv = drv_data->hpriv;
|
||||
int err;
|
||||
|
||||
if (drv_data->pwr) {
|
||||
err = reset_control_assert(drv_data->pwr);
|
||||
if (err) {
|
||||
dev_err(dev, "unable to pwrdwn");
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
ahci_platform_disable_resources(hpriv);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int st_ahci_resume(struct device *dev)
|
||||
{
|
||||
struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
|
||||
struct ahci_host_priv *hpriv = drv_data->hpriv;
|
||||
int err;
|
||||
|
||||
err = ahci_platform_enable_resources(hpriv);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = st_ahci_deassert_resets(dev);
|
||||
if (err) {
|
||||
ahci_platform_disable_resources(hpriv);
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(st_ahci_pm_ops, st_ahci_suspend, st_ahci_resume);
|
||||
|
||||
static struct of_device_id st_ahci_match[] = {
|
||||
{ .compatible = "st,ahci", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, st_ahci_match);
|
||||
|
||||
static struct platform_driver st_ahci_driver = {
|
||||
.driver = {
|
||||
.name = "st_ahci",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &st_ahci_pm_ops,
|
||||
.of_match_table = of_match_ptr(st_ahci_match),
|
||||
},
|
||||
.probe = st_ahci_probe,
|
||||
.remove = st_ahci_remove,
|
||||
};
|
||||
module_platform_driver(st_ahci_driver);
|
||||
|
||||
MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@st.com>");
|
||||
MODULE_AUTHOR("Francesco Virlinzi <francesco.virlinzi@st.com>");
|
||||
MODULE_DESCRIPTION("STMicroelectronics Sata Ahci driver");
|
||||
MODULE_LICENSE("GPL v2");
|
Загрузка…
Ссылка в новой задаче