MMC: S3C24XX: Add platform data for MMC/SD driver
This patch adds platform data support to the s3mci driver. This allows
flexible board-specific configuration of set_power, card detect and read only
pins.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 774af3d..684a10c 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -21,6 +21,8 @@
#include <asm/arch/regs-sdi.h>
#include <asm/arch/regs-gpio.h>
+#include <asm/plat-s3c24xx/mci.h>
+
#include "s3cmci.h"
#define DRIVER_NAME "s3c-mci"
@@ -1011,6 +1013,9 @@
s3c2410_gpio_cfgpin(S3C2410_GPE9, S3C2410_GPE9_SDDAT2);
s3c2410_gpio_cfgpin(S3C2410_GPE10, S3C2410_GPE10_SDDAT3);
+ if (host->pdata->set_power)
+ host->pdata->set_power(ios->power_mode, ios->vdd);
+
if (!host->is2440)
mci_con |= S3C2410_SDICON_FIFORESET;
@@ -1024,6 +1029,9 @@
if (host->is2440)
mci_con |= S3C2440_SDICON_SDRESET;
+ if (host->pdata->set_power)
+ host->pdata->set_power(ios->power_mode, ios->vdd);
+
break;
}
@@ -1072,9 +1080,25 @@
writel(con, host->base + S3C2410_SDICON);
}
+static int s3cmci_get_ro(struct mmc_host *mmc)
+{
+ struct s3cmci_host *host = mmc_priv(mmc);
+
+ if (host->pdata->gpio_wprotect == 0)
+ return 0;
+
+ return s3c2410_gpio_getpin(host->pdata->gpio_wprotect);
+}
+
static struct mmc_host_ops s3cmci_ops = {
.request = s3cmci_request,
.set_ios = s3cmci_set_ios,
+ .get_ro = s3cmci_get_ro,
+};
+
+static struct s3c24xx_mci_pdata s3cmci_def_pdata = {
+ /* This is currently here to avoid a number of if (host->pdata)
+ * checks. Any zero fields to ensure reaonable defaults are picked. */
};
static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
@@ -1094,6 +1118,12 @@
host->pdev = pdev;
host->is2440 = is2440;
+ 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);
@@ -1112,7 +1142,8 @@
host->pio_active = XFER_NONE;
host->dma = S3CMCI_DMA;
- host->irq_cd = IRQ_EINT2;
+ host->irq_cd = s3c2410_gpio_getirq(host->pdata->gpio_detect);
+ s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!host->mem) {
@@ -1158,7 +1189,7 @@
disable_irq(host->irq);
- s3c2410_gpio_cfgpin(S3C2410_GPF2, S3C2410_GPF2_EINT2);
+ s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
@@ -1168,6 +1199,10 @@
goto probe_free_irq;
}
+ if (host->pdata->gpio_wprotect)
+ s3c2410_gpio_cfgpin(host->pdata->gpio_wprotect,
+ S3C2410_GPIO_INPUT);
+
if (s3c2410_dma_request(S3CMCI_DMA, &s3cmci_dma_client, NULL)) {
dev_err(&pdev->dev, "unable to get DMA channel.\n");
ret = -EBUSY;
@@ -1191,11 +1226,14 @@
host->clk_rate = clk_get_rate(host->clk);
mmc->ops = &s3cmci_ops;
- mmc->ocr_avail = MMC_VDD_32_33;
+ mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
mmc->caps = MMC_CAP_4_BIT_DATA;
mmc->f_min = host->clk_rate / (host->clk_div * 256);
mmc->f_max = host->clk_rate / host->clk_div;
+ if (host->pdata->ocr_avail)
+ mmc->ocr_avail = host->pdata->ocr_avail;
+
mmc->max_blk_count = 4095;
mmc->max_blk_size = 4095;
mmc->max_req_size = 4095 * 512;
diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h
index 90b8af7d..37d9c60 100644
--- a/drivers/mmc/host/s3cmci.h
+++ b/drivers/mmc/host/s3cmci.h
@@ -22,6 +22,7 @@
struct s3cmci_host {
struct platform_device *pdev;
+ struct s3c24xx_mci_pdata *pdata;
struct mmc_host *mmc;
struct resource *mem;
struct clk *clk;
diff --git a/include/asm-arm/plat-s3c24xx/mci.h b/include/asm-arm/plat-s3c24xx/mci.h
new file mode 100644
index 0000000..5be2c14
--- /dev/null
+++ b/include/asm-arm/plat-s3c24xx/mci.h
@@ -0,0 +1,12 @@
+#ifndef _ARCH_MCI_H
+#define _ARCH_MCI_H
+
+struct s3c24xx_mci_pdata {
+ unsigned int gpio_detect;
+ unsigned int gpio_wprotect;
+ unsigned long ocr_avail;
+ void (*set_power)(unsigned char power_mode,
+ unsigned short vdd);
+};
+
+#endif /* _ARCH_NCI_H */