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>

2 files changed, 42 insertions, 3 deletions

diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 774af3d7218f..684a10ca2e8f 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 @@ 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 90b8af7d8a46..37d9c60010c9 100644
--- 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;