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Subject[patch v2 07/16] 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>

Index: linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.c
===================================================================
--- linux-2.6.26-rc5-q2.orig/drivers/mmc/host/s3cmci.c 2008-06-16 15:24:57.000000000 +0100
+++ linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.c 2008-06-16 15:24:59.000000000 +0100
@@ -21,6 +21,7 @@

#include <asm/arch/regs-sdi.h>
#include <asm/arch/regs-gpio.h>
+#include <asm/arch/mci.h>

#include "s3cmci.h"

@@ -1005,6 +1006,9 @@ static void s3cmci_set_ios(struct mmc_ho
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;

@@ -1018,6 +1022,9 @@ static void s3cmci_set_ios(struct mmc_ho
if (host->is2440)
mci_con |= S3C2440_SDICON_SDRESET;

+ if (host->pdata->set_power)
+ host->pdata->set_power(ios->power_mode, ios->vdd);
+
break;
}

@@ -1066,9 +1073,26 @@ static void s3cmci_reset(struct s3cmci_h
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 = {
+ .gpio_detect = 0,
+ .set_power = NULL,
+ .ocr_avail = MMC_VDD_32_33,
};

static int s3cmci_probe(struct platform_device *pdev, int is2440)
@@ -1089,6 +1113,12 @@ static int s3cmci_probe(struct platform_
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);

@@ -1107,7 +1137,8 @@ static int s3cmci_probe(struct platform_
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) {
@@ -1149,7 +1180,7 @@ static int s3cmci_probe(struct platform_

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)) {
@@ -1159,6 +1190,10 @@ static int s3cmci_probe(struct platform_
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;
@@ -1182,7 +1217,7 @@ static int s3cmci_probe(struct platform_
host->clk_rate = clk_get_rate(host->clk);

mmc->ops = &s3cmci_ops;
- mmc->ocr_avail = MMC_VDD_32_33;
+ mmc->ocr_avail = host->pdata->ocr_avail;
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;
Index: linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.h
===================================================================
--- linux-2.6.26-rc5-q2.orig/drivers/mmc/host/s3cmci.h 2008-06-16 15:13:28.000000000 +0100
+++ linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.h 2008-06-16 15:24:59.000000000 +0100
@@ -22,6 +22,7 @@ enum s3cmci_waitfor {

struct s3cmci_host {
struct platform_device *pdev;
+ struct s3c24xx_mci_pdata *pdata;
struct mmc_host *mmc;
struct resource *mem;
struct clk *clk;
Index: linux-2.6.26-rc5-q2/include/asm-arm/arch-s3c2410/mci.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.26-rc5-q2/include/asm-arm/arch-s3c2410/mci.h 2008-06-16 15:24:59.000000000 +0100
@@ -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 */
--
Ben (ben@fluff.org, http://www.fluff.org/)

'a smiley only costs 4 bytes'


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