[PATCH 4/4] ARM: S3C2416: Add platform helpers for setup SDHCI

[jekhor@gmail.com (Yauhen Kharuzhy)]

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 <jekhor@gmail.com>
---
 arch/arm/mach-s3c2416/Kconfig              |   23 ++++++++++
 arch/arm/mach-s3c2416/Makefile             |    5 ++
 arch/arm/mach-s3c2416/s3c2416.c            |    5 ++
 arch/arm/mach-s3c2416/setup-sdhci-gpio.c   |   60 +++++++++++++++++++++++++++
 arch/arm/mach-s3c2416/setup-sdhci.c        |   62 ++++++++++++++++++++++++++++
 arch/arm/plat-samsung/include/plat/sdhci.h |   34 +++++++++++++++
 6 files changed, 189 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-s3c2416/setup-sdhci-gpio.c
 create mode 100644 arch/arm/mach-s3c2416/setup-sdhci.c

diff --git a/arch/arm/mach-s3c2416/Kconfig b/arch/arm/mach-s3c2416/Kconfig
index eafb0ed..e055c7f 100644
--- a/arch/arm/mach-s3c2416/Kconfig
+++ b/arch/arm/mach-s3c2416/Kconfig
@@ -25,6 +25,17 @@ config S3C2416_DMA
 	help
 	  Internal config node for S3C2416 DMA support
 
+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
@@ -36,7 +47,19 @@ config MACH_SMDK2416
 	select S3C_DEV_HSMMC1
 	select S3C_DEV_NAND
 	select S3C_DEV_USB_HOST
+	select S3C2416_SETUP_SDHCI
 	help
 	  Say Y here if you are using an SMDK2416
 
+config MACH_HANLIN_V3C
+	bool "Hanlin eReader V3C"
+	select CPU_S3C2416
+	select S3C_DEV_HSMMC
+	select S3C_DEV_HSMMC1
+	select S3C_DEV_NAND
+	select S3C_DEV_USB_HOST
+	select S3C2416_SETUP_SDHCI
+	help
+	  Say Y here if you are using an Jinke's Hanlin V3C eReader
+
 endmenu
diff --git a/arch/arm/mach-s3c2416/Makefile b/arch/arm/mach-s3c2416/Makefile
index 6c12c7b..678e148 100644
--- a/arch/arm/mach-s3c2416/Makefile
+++ b/arch/arm/mach-s3c2416/Makefile
@@ -14,6 +14,11 @@ obj-$(CONFIG_CPU_S3C2416)	+= irq.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-$(CONFIG_MACH_SMDK2416)	+= mach-smdk2416.o
+obj-$(CONFIG_MACH_HANLIN_V3C)	+= mach-v3c.o
diff --git a/arch/arm/mach-s3c2416/s3c2416.c b/arch/arm/mach-s3c2416/s3c2416.c
index 355ab62..06eacf8 100644
--- 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>
 
@@ -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
index 0000000..ebdab15
--- /dev/null
+++ b/arch/arm/mach-s3c2416/setup-sdhci-gpio.c
@@ -0,0 +1,60 @@
+/* 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 <mach/gpio.h>
+#include <mach/regs-gpio.h>
+#include <plat/gpio-cfg.h>
+
+/* Note: hsmmc1 and hsmmc0 are swapped versus datasheet */
+
+void s3c2416_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+	unsigned int gpio;
+	unsigned int end;
+
+	end = S3C2410_GPE(7 + width);
+
+	/* Set all the necessary GPE pins to special-function 0 */
+	for (gpio = S3C2410_GPE(5); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+}
+
+void s3c2416_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+	unsigned int gpio;
+	unsigned int end;
+
+	end = S3C2410_GPL(0 + width);
+
+	/* Set all the necessary GPG pins to special-function 0 */
+	for (gpio = S3C2410_GPL(0); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	s3c_gpio_cfgpin(S3C2410_GPL(8), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S3C2410_GPL(8), S3C_GPIO_PULL_NONE);
+	s3c_gpio_cfgpin(S3C2410_GPL(9), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S3C2410_GPL(9), S3C_GPIO_PULL_NONE);
+}
+
+
diff --git a/arch/arm/mach-s3c2416/setup-sdhci.c b/arch/arm/mach-s3c2416/setup-sdhci.c
new file mode 100644
index 0000000..345ddd1
--- /dev/null
+++ b/arch/arm/mach-s3c2416/setup-sdhci.c
@@ -0,0 +1,62 @@
+/* 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 = 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);
+
+	writel(ctrl2, r + S3C_SDHCI_CONTROL2);
+	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 13f9fb2..d408140 100644
--- a/arch/arm/plat-samsung/include/plat/sdhci.h
+++ b/arch/arm/plat-samsung/include/plat/sdhci.h
@@ -78,6 +78,8 @@ extern void s3c64xx_setup_sdhci2_cfg_gpio(struct platform_device *, int w);
 extern void s5pv210_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
 extern void s5pv210_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
 extern void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *, int w);
+extern void s3c2416_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
+extern void s3c2416_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
 
 /* S3C6400 SDHCI setup */
 
@@ -270,6 +272,38 @@ static inline void s5pv210_default_sdhci1(void) { }
 static inline void s5pv210_default_sdhci2(void) { }
 #endif /* CONFIG_S5PC100_SETUP_SDHCI */
 
+/* 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);
+
+#ifdef CONFIG_S3C_DEV_HSMMC
+static inline void s3c2416_default_sdhci0(void)
+{
+	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;
+}
+#else
+static inline void s3c2416_default_sdhci0(void) { }
+#endif /* CONFIG_S3C_DEV_HSMMC */
+
+#ifdef CONFIG_S3C_DEV_HSMMC1
+static inline void s3c2416_default_sdhci1(void)
+{
+	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;
+}
+#else
+static inline void s3c2416_default_sdhci1(void) { }
+#endif /* CONFIG_S3C_DEV_HSMMC1 */
+
+#endif /* CONFIG_S3C2416_SETUP_SDHCI */
 
 
 
-- 
1.6.6.1