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 774af3d7218facc511b3fef157c00067e59ad5b0..684a10ca2e8f69987157e7ce8b34e77da9f11c90 100644 (file)
--- 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 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                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 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                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 @@ 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);
+
+       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 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
        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 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
        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 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
 
        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 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
                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 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
        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 90b8af7d8a463a16267ca0999b8dbe60139d8c94..37d9c60010c90d260b8e8fae077693824241828d 100644 (file)
--- a/drivers/mmc/host/s3cmci.h
+++ b/drivers/mmc/host/s3cmci.h
@@ -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;

diff --git a/include/asm-arm/plat-s3c24xx/mci.h b/include/asm-arm/plat-s3c24xx/mci.h
new file mode 100644 (file)
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 */