Commit e584e075 authored by Sergio Prado's avatar Sergio Prado Committed by Ulf Hansson

mmc: host: s3cmci: allow probing from device tree

Allows configuring Samsung S3C24XX MMC/SD/SDIO controller using a device
tree.
Signed-off-by: default avatarSergio Prado <sergio.prado@e-labworks.com>
[Arnd: fix broken conditional expression]
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent d5cc7c80
......@@ -24,6 +24,10 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/mmc/slot-gpio.h>
#include <plat/gpio-cfg.h>
#include <mach/dma.h>
......@@ -807,21 +811,6 @@ static irqreturn_t s3cmci_irq(int irq, void *dev_id)
}
/*
* ISR for the CardDetect Pin
*/
static irqreturn_t s3cmci_irq_cd(int irq, void *dev_id)
{
struct s3cmci_host *host = (struct s3cmci_host *)dev_id;
dbg(host, dbg_irq, "card detect\n");
mmc_detect_change(host->mmc, msecs_to_jiffies(500));
return IRQ_HANDLED;
}
static void s3cmci_dma_done_callback(void *arg)
{
struct s3cmci_host *host = arg;
......@@ -1177,19 +1166,6 @@ static void s3cmci_send_request(struct mmc_host *mmc)
s3cmci_enable_irq(host, true);
}
static int s3cmci_card_present(struct mmc_host *mmc)
{
struct s3cmci_host *host = mmc_priv(mmc);
struct s3c24xx_mci_pdata *pdata = host->pdata;
int ret;
if (pdata->no_detect)
return -ENOSYS;
ret = gpio_get_value(pdata->gpio_detect) ? 0 : 1;
return ret ^ pdata->detect_invert;
}
static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct s3cmci_host *host = mmc_priv(mmc);
......@@ -1198,7 +1174,7 @@ static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
host->cmd_is_stop = 0;
host->mrq = mrq;
if (s3cmci_card_present(mmc) == 0) {
if (mmc_gpio_get_cd(mmc) == 0) {
dbg(host, dbg_err, "%s: no medium present\n", __func__);
host->mrq->cmd->error = -ENOMEDIUM;
mmc_request_done(mmc, mrq);
......@@ -1242,8 +1218,9 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
case MMC_POWER_ON:
case MMC_POWER_UP:
/* Configure GPE5...GPE10 pins in SD mode */
s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2),
S3C_GPIO_PULL_NONE);
if (!host->pdev->dev.of_node)
s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2),
S3C_GPIO_PULL_NONE);
if (host->pdata->set_power)
host->pdata->set_power(ios->power_mode, ios->vdd);
......@@ -1255,7 +1232,8 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
case MMC_POWER_OFF:
default:
gpio_direction_output(S3C2410_GPE(5), 0);
if (!host->pdev->dev.of_node)
gpio_direction_output(S3C2410_GPE(5), 0);
if (host->is2440)
mci_con |= S3C2440_SDICON_SDRESET;
......@@ -1295,21 +1273,6 @@ static void s3cmci_reset(struct s3cmci_host *host)
writel(con, host->base + S3C2410_SDICON);
}
static int s3cmci_get_ro(struct mmc_host *mmc)
{
struct s3cmci_host *host = mmc_priv(mmc);
struct s3c24xx_mci_pdata *pdata = host->pdata;
int ret;
if (pdata->no_wprotect)
return 0;
ret = gpio_get_value(pdata->gpio_wprotect) ? 1 : 0;
ret ^= pdata->wprotect_invert;
return ret;
}
static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct s3cmci_host *host = mmc_priv(mmc);
......@@ -1353,8 +1316,8 @@ static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable)
static struct mmc_host_ops s3cmci_ops = {
.request = s3cmci_request,
.set_ios = s3cmci_set_ios,
.get_ro = s3cmci_get_ro,
.get_cd = s3cmci_card_present,
.get_ro = mmc_gpio_get_ro,
.get_cd = mmc_gpio_get_cd,
.enable_sdio_irq = s3cmci_enable_sdio_irq,
};
......@@ -1545,21 +1508,14 @@ static inline void s3cmci_debugfs_remove(struct s3cmci_host *host) { }
#endif /* CONFIG_DEBUG_FS */
static int s3cmci_probe(struct platform_device *pdev)
static int s3cmci_probe_pdata(struct s3cmci_host *host)
{
struct s3cmci_host *host;
struct mmc_host *mmc;
int ret;
int is2440;
int i;
struct platform_device *pdev = host->pdev;
struct mmc_host *mmc = host->mmc;
struct s3c24xx_mci_pdata *pdata;
int i, ret;
is2440 = platform_get_device_id(pdev)->driver_data;
mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
if (!mmc) {
ret = -ENOMEM;
goto probe_out;
}
host->is2440 = platform_get_device_id(pdev)->driver_data;
for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) {
ret = gpio_request(i, dev_name(&pdev->dev));
......@@ -1569,25 +1525,101 @@ static int s3cmci_probe(struct platform_device *pdev)
for (i--; i >= S3C2410_GPE(5); i--)
gpio_free(i);
goto probe_free_host;
return ret;
}
}
if (!pdev->dev.platform_data)
pdev->dev.platform_data = &s3cmci_def_pdata;
pdata = pdev->dev.platform_data;
if (pdata->no_wprotect)
mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
if (pdata->no_detect)
mmc->caps |= MMC_CAP_NEEDS_POLL;
if (pdata->wprotect_invert)
mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
if (pdata->detect_invert)
mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
if (gpio_is_valid(pdata->gpio_detect)) {
ret = mmc_gpio_request_cd(mmc, pdata->gpio_detect, 0);
if (ret) {
dev_err(&pdev->dev, "error requesting GPIO for CD %d\n",
ret);
return ret;
}
}
if (gpio_is_valid(pdata->gpio_wprotect)) {
ret = mmc_gpio_request_ro(mmc, pdata->gpio_wprotect);
if (ret) {
dev_err(&pdev->dev, "error requesting GPIO for WP %d\n",
ret);
return ret;
}
}
return 0;
}
static int s3cmci_probe_dt(struct s3cmci_host *host)
{
struct platform_device *pdev = host->pdev;
struct s3c24xx_mci_pdata *pdata;
struct mmc_host *mmc = host->mmc;
int ret;
host->is2440 = (int) of_device_get_match_data(&pdev->dev);
ret = mmc_of_parse(mmc);
if (ret)
return ret;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
pdev->dev.platform_data = pdata;
return 0;
}
static int s3cmci_probe(struct platform_device *pdev)
{
struct s3cmci_host *host;
struct mmc_host *mmc;
int ret;
int i;
mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
if (!mmc) {
ret = -ENOMEM;
goto probe_out;
}
host = mmc_priv(mmc);
host->mmc = mmc;
host->pdev = pdev;
host->is2440 = is2440;
if (pdev->dev.of_node)
ret = s3cmci_probe_dt(host);
else
ret = s3cmci_probe_pdata(host);
if (ret)
goto probe_free_host;
host->pdata = pdev->dev.platform_data;
if (!host->pdata) {
pdev->dev.platform_data = &s3cmci_def_pdata;
host->pdata = &s3cmci_def_pdata;
}
spin_lock_init(&host->complete_lock);
tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host);
if (is2440) {
if (host->is2440) {
host->sdiimsk = S3C2440_SDIIMSK;
host->sdidata = S3C2440_SDIDATA;
host->clk_div = 1;
......@@ -1645,43 +1677,6 @@ static int s3cmci_probe(struct platform_device *pdev)
disable_irq(host->irq);
host->irq_state = false;
if (!host->pdata->no_detect) {
ret = gpio_request(host->pdata->gpio_detect, "s3cmci detect");
if (ret) {
dev_err(&pdev->dev, "failed to get detect gpio\n");
goto probe_free_irq;
}
host->irq_cd = gpio_to_irq(host->pdata->gpio_detect);
if (host->irq_cd >= 0) {
if (request_irq(host->irq_cd, s3cmci_irq_cd,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
DRIVER_NAME, host)) {
dev_err(&pdev->dev,
"can't get card detect irq.\n");
ret = -ENOENT;
goto probe_free_gpio_cd;
}
} else {
dev_warn(&pdev->dev,
"host detect has no irq available\n");
gpio_direction_input(host->pdata->gpio_detect);
}
} else
host->irq_cd = -1;
if (!host->pdata->no_wprotect) {
ret = gpio_request(host->pdata->gpio_wprotect, "s3cmci wp");
if (ret) {
dev_err(&pdev->dev, "failed to get writeprotect\n");
goto probe_free_irq_cd;
}
gpio_direction_input(host->pdata->gpio_wprotect);
}
/* Depending on the dma state, get a DMA channel to use. */
if (s3cmci_host_usedma(host)) {
......@@ -1689,7 +1684,7 @@ static int s3cmci_probe(struct platform_device *pdev)
ret = PTR_ERR_OR_ZERO(host->dma);
if (ret) {
dev_err(&pdev->dev, "cannot get DMA channel.\n");
goto probe_free_gpio_wp;
goto probe_free_irq;
}
}
......@@ -1768,18 +1763,6 @@ static int s3cmci_probe(struct platform_device *pdev)
if (s3cmci_host_usedma(host))
dma_release_channel(host->dma);
probe_free_gpio_wp:
if (!host->pdata->no_wprotect)
gpio_free(host->pdata->gpio_wprotect);
probe_free_gpio_cd:
if (!host->pdata->no_detect)
gpio_free(host->pdata->gpio_detect);
probe_free_irq_cd:
if (host->irq_cd >= 0)
free_irq(host->irq_cd, host);
probe_free_irq:
free_irq(host->irq, host);
......@@ -1790,8 +1773,9 @@ static int s3cmci_probe(struct platform_device *pdev)
release_mem_region(host->mem->start, resource_size(host->mem));
probe_free_gpio:
for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
gpio_free(i);
if (!pdev->dev.of_node)
for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
gpio_free(i);
probe_free_host:
mmc_free_host(mmc);
......@@ -1818,7 +1802,6 @@ static int s3cmci_remove(struct platform_device *pdev)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct s3cmci_host *host = mmc_priv(mmc);
struct s3c24xx_mci_pdata *pd = host->pdata;
int i;
s3cmci_shutdown(pdev);
......@@ -1832,15 +1815,9 @@ static int s3cmci_remove(struct platform_device *pdev)
free_irq(host->irq, host);
if (!pd->no_wprotect)
gpio_free(pd->gpio_wprotect);
if (!pd->no_detect)
gpio_free(pd->gpio_detect);
for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
gpio_free(i);
if (!pdev->dev.of_node)
for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
gpio_free(i);
iounmap(host->base);
release_mem_region(host->mem->start, resource_size(host->mem));
......@@ -1849,6 +1826,23 @@ static int s3cmci_remove(struct platform_device *pdev)
return 0;
}
static const struct of_device_id s3cmci_dt_match[] = {
{
.compatible = "samsung,s3c2410-sdi",
.data = (void *)0,
},
{
.compatible = "samsung,s3c2412-sdi",
.data = (void *)1,
},
{
.compatible = "samsung,s3c2440-sdi",
.data = (void *)1,
},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, s3cmci_dt_match);
static const struct platform_device_id s3cmci_driver_ids[] = {
{
.name = "s3c2410-sdi",
......@@ -1868,6 +1862,7 @@ MODULE_DEVICE_TABLE(platform, s3cmci_driver_ids);
static struct platform_driver s3cmci_driver = {
.driver = {
.name = "s3c-sdi",
.of_match_table = s3cmci_dt_match,
},
.id_table = s3cmci_driver_ids,
.probe = s3cmci_probe,
......
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