ARM: S3C2416: Add platform helpers for setup SDHCI

Samsung S3C2416 has two SDHCI controllers compatible with other
Samsung's SoCs (S3C64XX, S5PC100 etc...).

Add required platform setup code that the devices can be used with
sdhci-s3c driver.

Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
[kgene.kim@samsung.com: change to __raw_{readl,writel} from {readl,writel}]
[kgene.kim@samsung.com: build error fixes]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-s3c2416/Kconfig b/arch/arm/mach-s3c2416/Kconfig
index df8d14974c90876b31d16ab2a2d2367ef1f7af89..69b48a7d1dbdb4502d55d103bb1fa382def5538e 100644 (file)
--- a/arch/arm/mach-s3c2416/Kconfig
+++ b/arch/arm/mach-s3c2416/Kconfig
@@ -31,6 +31,17 @@ config S3C2416_PM
        help
          Internal config node to apply S3C2416 power management
 
+config S3C2416_SETUP_SDHCI
+       bool
+       select S3C2416_SETUP_SDHCI_GPIO
+       help
+         Internal helper functions for S3C2416 based SDHCI systems
+
+config S3C2416_SETUP_SDHCI_GPIO
+       bool
+       help
+         Common setup code for SDHCI gpio.
+
 menu "S3C2416 Machines"
 
 config MACH_SMDK2416
@@ -42,6 +53,7 @@ config MACH_SMDK2416
        select S3C_DEV_HSMMC1
        select S3C_DEV_NAND
        select S3C_DEV_USB_HOST
+       select S3C2416_SETUP_SDHCI
        select S3C2416_PM if PM
        help
          Say Y here if you are using an SMDK2416

diff --git a/arch/arm/mach-s3c2416/Makefile b/arch/arm/mach-s3c2416/Makefile
index ef038d62ffdb08e32b4e67e7fad74b76c0ea2d68..7b805b279caf9cc2ebc3d3f1d334a6911add1b22 100644 (file)
--- a/arch/arm/mach-s3c2416/Makefile
+++ b/arch/arm/mach-s3c2416/Makefile
@@ -14,6 +14,10 @@ obj-$(CONFIG_CPU_S3C2416)    += irq.o
 obj-$(CONFIG_S3C2416_PM)       += pm.o
 #obj-$(CONFIG_S3C2416_DMA)     += dma.o
 
+# Device setup
+obj-$(CONFIG_S3C2416_SETUP_SDHCI) += setup-sdhci.o
+obj-$(CONFIG_S3C2416_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
+
 # Machine support
 
 obj-$(CONFIG_MACH_SMDK2416)    += mach-smdk2416.o

diff --git a/arch/arm/mach-s3c2416/s3c2416.c b/arch/arm/mach-s3c2416/s3c2416.c
index 63f39cdc0972f18300b47e28867afcd514a18385..ba7fd87374348e0b61c9624cefa155dc8418eb43 100644 (file)
--- a/arch/arm/mach-s3c2416/s3c2416.c
+++ b/arch/arm/mach-s3c2416/s3c2416.c
@@ -53,6 +53,7 @@
 #include <plat/s3c2416.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/sdhci.h>
 
 #include <plat/iic-core.h>
 #include <plat/fb-core.h>
@@ -115,6 +116,10 @@ void __init s3c2416_map_io(void)
        s3c24xx_gpiocfg_default.set_pull = s3c_gpio_setpull_updown;
        s3c24xx_gpiocfg_default.get_pull = s3c_gpio_getpull_updown;
 
+       /* initialize device information early */
+       s3c2416_default_sdhci0();
+       s3c2416_default_sdhci1();
+
        iotable_init(s3c2416_iodesc, ARRAY_SIZE(s3c2416_iodesc));
 }
 

diff --git a/arch/arm/mach-s3c2416/setup-sdhci-gpio.c b/arch/arm/mach-s3c2416/setup-sdhci-gpio.c
new file mode 100644 (file)
index 0000000..f65cb3e
--- /dev/null
+++ b/arch/arm/mach-s3c2416/setup-sdhci-gpio.c
@@ -0,0 +1,34 @@
+/* linux/arch/arm/plat-s3c2416/setup-sdhci-gpio.c
+ *
+ * Copyright 2010 Promwad Innovation Company
+ *     Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
+ *
+ * S3C2416 - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
+ *
+ * Based on mach-s3c64xx/setup-sdhci-gpio.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+
+#include <mach/regs-gpio.h>
+#include <plat/gpio-cfg.h>
+
+void s3c2416_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+       s3c_gpio_cfgrange_nopull(S3C2410_GPE(5), 2 + width, S3C_GPIO_SFN(2));
+}
+
+void s3c2416_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+       s3c_gpio_cfgrange_nopull(S3C2410_GPL(0), width, S3C_GPIO_SFN(2));
+       s3c_gpio_cfgrange_nopull(S3C2410_GPL(8), 2, S3C_GPIO_SFN(2));
+}

diff --git a/arch/arm/mach-s3c2416/setup-sdhci.c b/arch/arm/mach-s3c2416/setup-sdhci.c
new file mode 100644 (file)
index 0000000..ed34fad
--- /dev/null
+++ b/arch/arm/mach-s3c2416/setup-sdhci.c
@@ -0,0 +1,61 @@
+/* linux/arch/arm/mach-s3c2416/setup-sdhci.c
+ *
+ * Copyright 2010 Promwad Innovation Company
+ *     Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
+ *
+ * S3C2416 - Helper functions for settign up SDHCI device(s) (HSMMC)
+ *
+ * Based on mach-s3c64xx/setup-sdhci.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include <plat/regs-sdhci.h>
+#include <plat/sdhci.h>
+
+/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
+
+char *s3c2416_hsmmc_clksrcs[4] = {
+       [0] = "hsmmc",
+       [1] = "hsmmc",
+       [2] = "hsmmc-if",
+       /* [3] = "48m", - note not successfully used yet */
+};
+
+void s3c2416_setup_sdhci_cfg_card(struct platform_device *dev,
+                                 void __iomem *r,
+                                 struct mmc_ios *ios,
+                                 struct mmc_card *card)
+{
+       u32 ctrl2, ctrl3;
+
+       ctrl2 = __raw_readl(r + S3C_SDHCI_CONTROL2);
+       ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
+       ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
+                 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
+                 S3C_SDHCI_CTRL2_ENFBCLKRX |
+                 S3C_SDHCI_CTRL2_DFCNT_NONE |
+                 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
+
+       if (ios->clock < 25 * 1000000)
+               ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
+                        S3C_SDHCI_CTRL3_FCSEL2 |
+                        S3C_SDHCI_CTRL3_FCSEL1 |
+                        S3C_SDHCI_CTRL3_FCSEL0);
+       else
+               ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
+
+       __raw_writel(ctrl2, r + S3C_SDHCI_CONTROL2);
+       __raw_writel(ctrl3, r + S3C_SDHCI_CONTROL3);
+}

diff --git a/arch/arm/plat-samsung/include/plat/sdhci.h b/arch/arm/plat-samsung/include/plat/sdhci.h
index 85853f8c4c5dc9f1546ccd5318edd1784a47cd81..5a41a0b69eec818ac8e855119efb21d3319b9e46 100644 (file)
--- a/arch/arm/plat-samsung/include/plat/sdhci.h
+++ b/arch/arm/plat-samsung/include/plat/sdhci.h
@@ -107,6 +107,8 @@ extern struct s3c_sdhci_platdata s3c_hsmmc3_def_platdata;
 
 /* Helper function availablity */
 
+extern void s3c2416_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
+extern void s3c2416_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
 extern void s3c64xx_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
 extern void s3c64xx_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
 extern void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
@@ -122,6 +124,39 @@ extern void s5pv310_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
 extern void s5pv310_setup_sdhci2_cfg_gpio(struct platform_device *, int w);
 extern void s5pv310_setup_sdhci3_cfg_gpio(struct platform_device *, int w);
 
+/* S3C2416 SDHCI setup */
+
+#ifdef CONFIG_S3C2416_SETUP_SDHCI
+extern char *s3c2416_hsmmc_clksrcs[4];
+
+extern void s3c2416_setup_sdhci_cfg_card(struct platform_device *dev,
+                                          void __iomem *r,
+                                          struct mmc_ios *ios,
+                                          struct mmc_card *card);
+
+static inline void s3c2416_default_sdhci0(void)
+{
+#ifdef CONFIG_S3C_DEV_HSMMC
+       s3c_hsmmc0_def_platdata.clocks = s3c2416_hsmmc_clksrcs;
+       s3c_hsmmc0_def_platdata.cfg_gpio = s3c2416_setup_sdhci0_cfg_gpio;
+       s3c_hsmmc0_def_platdata.cfg_card = s3c2416_setup_sdhci_cfg_card;
+#endif /* CONFIG_S3C_DEV_HSMMC */
+}
+
+static inline void s3c2416_default_sdhci1(void)
+{
+#ifdef CONFIG_S3C_DEV_HSMMC1
+       s3c_hsmmc1_def_platdata.clocks = s3c2416_hsmmc_clksrcs;
+       s3c_hsmmc1_def_platdata.cfg_gpio = s3c2416_setup_sdhci1_cfg_gpio;
+       s3c_hsmmc1_def_platdata.cfg_card = s3c2416_setup_sdhci_cfg_card;
+#endif /* CONFIG_S3C_DEV_HSMMC1 */
+}
+
+#else
+static inline void s3c2416_default_sdhci0(void) { }
+static inline void s3c2416_default_sdhci1(void) { }
+
+#endif /* CONFIG_S3C2416_SETUP_SDHCI */
 /* S3C64XX SDHCI setup */
 
 #ifdef CONFIG_S3C64XX_SETUP_SDHCI