This patch adds support for SDHCI interface on SMDK6440 board.
Signed-off-by: Thomas Abraham <[email protected]>
---
arch/arm/mach-s5p6440/mach-smdk6440.c | 69 +++++++++++++++++++++++++++++++++
1 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-s5p6440/mach-smdk6440.c
b/arch/arm/mach-s5p6440/mach-smdk6440.c
index 3ae88f2..e039128 100644
--- a/arch/arm/mach-s5p6440/mach-smdk6440.c
+++ b/arch/arm/mach-s5p6440/mach-smdk6440.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/clk.h>
+#include <linux/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -38,6 +39,12 @@
#include <plat/devs.h>
#include <plat/cpu.h>
#include <plat/pll.h>
+#include <plat/sdhci.h>
+#include <plat/s5p-clock.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-core.h>
+#include <plat/gpio-cfg.h>
#define S5P6440_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
S3C2410_UCON_RXILEVEL | \
@@ -84,6 +91,10 @@ static struct s3c2410_uartcfg smdk6440_uartcfgs[] __initdata
= {
};
static struct platform_device *smdk6440_devices[] __initdata = {
+#ifdef CONFIG_MMC_SDHCI_S3C
+ &s3c_device_hsmmc0,
+ &s3c_device_hsmmc1,
+#endif
};
static void __init smdk6440_map_io(void)
@@ -93,9 +104,67 @@ static void __init smdk6440_map_io(void)
s3c24xx_init_uarts(smdk6440_uartcfgs, ARRAY_SIZE(smdk6440_uartcfgs));
}
+#ifdef CONFIG_MMC_SDHCI_S3C
+static void smdk6440_sdhci0_cfg_ext_cd(void)
+{
+ s3c_gpio_cfgpin(S5P6440_GPN(8), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5P6440_GPN(8), S3C_GPIO_PULL_NONE);
+ set_irq_type(IRQ_EINT(8), IRQ_TYPE_EDGE_BOTH);
+}
+
+static u32 smdk6440_sdhci0_card_detect(void)
+{
+ struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(S5P6440_GPN(8));
+ struct gpio_chip *gc = &chip->chip;
+ u32 present;
+ int offset;
+
+ offset = S5P6440_GPN(8) - chip->chip.base;
+ present = gc->get(gc, offset);
+ return !present;
+}
+
+static void smdk6440_sdhci_setup_clocks(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct clk *parent;
+
+ parent = clk_get(NULL, "dout_mpll");
+ if (IS_ERR(parent)) {
+ dev_err(dev, "failed to get parent clock of mmc_bus clock\n");
+ return;
+ }
+
+ if (!s5p_setup_sdhci_sclk(pdev, parent))
+ clk_put(parent);
+}
+
+static void __init smdk6440_sdhci_setup_platdata(void)
+{
+ struct s3c_sdhci_platdata *pdata;
+
+ /* SDHCI Slot 0 platform data */
+ /* SMDK6440 uses EINT(8) for SD/MMC card detection for slot 0 */
+ pdata = &s3c_hsmmc0_def_platdata;
+ pdata->cfg_ext_cd = smdk6440_sdhci0_cfg_ext_cd;
+ pdata->is_card_present = smdk6440_sdhci0_card_detect;
+ pdata->ext_cd = S5P_EINT(8);
+ pdata->cfg_clocks = smdk6440_sdhci_setup_clocks;
+ pdata->sclk_mmc_freq = 50 * MHZ;
+
+ /* SDHCI Slot 1 platform data */
+ pdata = &s3c_hsmmc1_def_platdata;
+ s3c_hsmmc1_def_platdata.cfg_clocks = smdk6440_sdhci_setup_clocks;
+ s3c_hsmmc1_def_platdata.sclk_mmc_freq = 50 * MHZ;
+}
+#endif /* CONFIG_MMC_SDHCI_S3C */
+
static void __init smdk6440_machine_init(void)
{
platform_add_devices(smdk6440_devices, ARRAY_SIZE(smdk6440_devices));
+#ifdef CONFIG_MMC_SDHCI_S3C
+ smdk6440_sdhci_setup_platdata();
+#endif
}
MACHINE_START(SMDK6440, "SMDK6440")
--
1.6.6.rc2
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