ARM: S3C64XX: Add support for Compact Flash driver on SMDK6410

Following is added for the CF-ATA driver:
	- Platform data strucure instantiation
	- Platform device enabling code
	- Addition of cfcon clock
	- Platform-specific gpio setup code

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

8 files changed, 79 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig
index f5a59727949f..12f063b12569 100644
--- a/arch/arm/mach-s3c64xx/Kconfig
+++ b/arch/arm/mach-s3c64xx/Kconfig
@@ -57,6 +57,11 @@ config S3C64XX_SETUP_I2C1
         help
           Common setup code for i2c bus 1.
 
+config S3C64XX_SETUP_IDE
+        bool
+        help
+          Common setup code for S3C64XX IDE.
+
 config S3C64XX_SETUP_FB_24BPP
         bool
         help
@@ -95,6 +100,7 @@ config MACH_SMDK6410
         select S3C_DEV_HSMMC
         select S3C_DEV_HSMMC1
         select S3C_DEV_I2C1
+        select SAMSUNG_DEV_IDE
         select S3C_DEV_FB
         select SAMSUNG_DEV_TS
         select S3C_DEV_USB_HOST
@@ -103,6 +109,7 @@ config MACH_SMDK6410
         select HAVE_S3C2410_WATCHDOG
         select S3C64XX_SETUP_SDHCI
         select S3C64XX_SETUP_I2C1
+        select S3C64XX_SETUP_IDE
         select S3C64XX_SETUP_FB_24BPP
         help
           Machine support for the Samsung SMDK6410
diff --git a/arch/arm/mach-s3c64xx/Makefile b/arch/arm/mach-s3c64xx/Makefile
index 9d1006938f5c..aa5c36772b1a 100644
--- a/arch/arm/mach-s3c64xx/Makefile
+++ b/arch/arm/mach-s3c64xx/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_S3C64XX_DMA)	+= dma.o
 
 obj-$(CONFIG_S3C64XX_SETUP_I2C0) += setup-i2c0.o
 obj-$(CONFIG_S3C64XX_SETUP_I2C1) += setup-i2c1.o
+obj-$(CONFIG_S3C64XX_SETUP_IDE) += setup-ide.o
 obj-$(CONFIG_S3C64XX_SETUP_SDHCI) += setup-sdhci.o
 obj-$(CONFIG_S3C64XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
 obj-$(CONFIG_S3C64XX_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
diff --git a/arch/arm/mach-s3c64xx/clock.c b/arch/arm/mach-s3c64xx/clock.c
index fbd85a9b7bbf..7772f92d2905 100644
--- a/arch/arm/mach-s3c64xx/clock.c
+++ b/arch/arm/mach-s3c64xx/clock.c
@@ -310,6 +310,12 @@ static struct clk init_clocks[] = {
                 .id             = -1,
                 .parent         = &clk_p,
                 .ctrlbit        = S3C_CLKCON_PCLK_AC97,
+        }, {
+                .name           = "cfcon",
+                .id             = -1,
+                .parent         = &clk_h,
+                .enable         = s3c64xx_hclk_ctrl,
+                .ctrlbit        = S3C_CLKCON_HCLK_IHOST,
         }
 };
 
diff --git a/arch/arm/mach-s3c64xx/include/mach/map.h b/arch/arm/mach-s3c64xx/include/mach/map.h
index e1eab3c94aea..1caaa5f25f8d 100644
--- a/arch/arm/mach-s3c64xx/include/mach/map.h
+++ b/arch/arm/mach-s3c64xx/include/mach/map.h
@@ -86,6 +86,9 @@
 #define S3C64XX_SZ_GPIO         SZ_4K
 
 #define S3C64XX_PA_SDRAM        (0x50000000)
+
+#define S3C64XX_PA_CFCON        (0x70300000)
+
 #define S3C64XX_PA_VIC0         (0x71200000)
 #define S3C64XX_PA_VIC1         (0x71300000)
 
@@ -120,5 +123,6 @@
 #define S3C_PA_WDT              S3C64XX_PA_WATCHDOG
 
 #define SAMSUNG_PA_ADC          S3C64XX_PA_ADC
+#define SAMSUNG_PA_CFCON        S3C64XX_PA_CFCON
 
 #endif /* __ASM_ARCH_6400_MAP_H */
diff --git a/arch/arm/mach-s3c64xx/include/mach/regs-clock.h b/arch/arm/mach-s3c64xx/include/mach/regs-clock.h
index 0114eb0c1fe7..05332b998ec0 100644
--- a/arch/arm/mach-s3c64xx/include/mach/regs-clock.h
+++ b/arch/arm/mach-s3c64xx/include/mach/regs-clock.h
@@ -34,6 +34,7 @@
 #define S3C_SCLK_GATE           S3C_CLKREG(0x38)
 #define S3C_MEM0_GATE           S3C_CLKREG(0x3C)
 #define S3C6410_CLK_SRC2        S3C_CLKREG(0x10C)
+#define S3C_MEM_SYS_CFG         S3C_CLKREG(0x120)
 
 /* CLKDIV0 */
 #define S3C6400_CLKDIV0_PCLK_MASK       (0xf << 12)
@@ -154,4 +155,8 @@
 #define S3C6400_CLKSRC_EPLL_MOUT_SHIFT  (2)
 #define S3C6400_CLKSRC_MFC              (1 << 4)
 
+/* MEM_SYS_CFG */
+#define MEM_SYS_CFG_INDEP_CF            0x4000
+#define MEM_SYS_CFG_EBI_FIX_PRI_CFCON   0x30
+
 #endif /* _PLAT_REGS_CLOCK_H */
diff --git a/arch/arm/mach-s3c64xx/mach-smdk6410.c b/arch/arm/mach-s3c64xx/mach-smdk6410.c
index d9a03555f88b..0d7d93fbc43b 100644
--- a/arch/arm/mach-s3c64xx/mach-smdk6410.c
+++ b/arch/arm/mach-s3c64xx/mach-smdk6410.c
@@ -56,6 +56,7 @@
 #include <mach/regs-gpio.h>
 #include <mach/regs-sys.h>
 #include <mach/regs-srom.h>
+#include <plat/ata.h>
 #include <plat/iic.h>
 #include <plat/fb.h>
 #include <plat/gpio-cfg.h>
@@ -242,6 +243,10 @@ static struct platform_device smdk6410_b_pwr_5v = {
 };
 #endif
 
+static struct s3c_ide_platdata smdk6410_ide_pdata __initdata = {
+        .setup_gpio     = s3c64xx_ide_setup_gpio,
+};
+
 static struct map_desc smdk6410_iodesc[] = {};
 
 static struct platform_device *smdk6410_devices[] __initdata = {
@@ -265,6 +270,7 @@ static struct platform_device *smdk6410_devices[] __initdata = {
 
         &smdk6410_smsc911x,
         &s3c_device_adc,
+        &s3c_device_cfcon,
         &s3c_device_ts,
         &s3c_device_wdt,
 };
@@ -665,6 +671,8 @@ static void __init smdk6410_machine_init(void)
         i2c_register_board_info(0, i2c_devs0, ARRAY_SIZE(i2c_devs0));
         i2c_register_board_info(1, i2c_devs1, ARRAY_SIZE(i2c_devs1));
 
+        s3c_ide_set_platdata(&smdk6410_ide_pdata);
+
         platform_add_devices(smdk6410_devices, ARRAY_SIZE(smdk6410_devices));
 }
 
diff --git a/arch/arm/mach-s3c64xx/s3c6410.c b/arch/arm/mach-s3c64xx/s3c6410.c
index 014401c39f36..3ad25d296880 100644
--- a/arch/arm/mach-s3c64xx/s3c6410.c
+++ b/arch/arm/mach-s3c64xx/s3c6410.c
@@ -37,6 +37,7 @@
 #include <plat/devs.h>
 #include <plat/clock.h>
 #include <plat/sdhci.h>
+#include <plat/ata-core.h>
 #include <plat/iic-core.h>
 #include <plat/adc.h>
 #include <plat/onenand-core.h>
@@ -58,6 +59,7 @@ void __init s3c6410_map_io(void)
         s3c_device_nand.name = "s3c6400-nand";
         s3c_onenand_setname("s3c6410-onenand");
         s3c64xx_onenand1_setname("s3c6410-onenand");
+        s3c_cfcon_setname("s3c64xx-pata");
 }
 
 void __init s3c6410_init_clocks(int xtal)
diff --git a/arch/arm/mach-s3c64xx/setup-ide.c b/arch/arm/mach-s3c64xx/setup-ide.c
new file mode 100644
index 000000000000..c12c315f33bc
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/setup-ide.c
@@ -0,0 +1,46 @@
+/* linux/arch/arm/mach-s3c64xx/setup-ide.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S3C64XX setup information for IDE
+ *
+ * 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/gpio.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+#include <mach/regs-clock.h>
+#include <plat/gpio-cfg.h>
+
+void s3c64xx_ide_setup_gpio(void)
+{
+        u32 reg;
+        u32 gpio = 0;
+
+        reg = readl(S3C_MEM_SYS_CFG) & (~0x3f);
+
+        /* Independent CF interface, CF chip select configuration */
+        writel(reg | MEM_SYS_CFG_INDEP_CF |
+                MEM_SYS_CFG_EBI_FIX_PRI_CFCON, S3C_MEM_SYS_CFG);
+
+        s3c_gpio_cfgpin(S3C64XX_GPB(4), S3C_GPIO_SFN(4));
+
+        /* Set XhiDATA[15:0] pins as CF Data[15:0] */
+        for (gpio = S3C64XX_GPK(0); gpio <= S3C64XX_GPK(15); gpio++)
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(5));
+
+        /* Set XhiADDR[2:0] pins as CF ADDR[2:0] */
+        for (gpio = S3C64XX_GPL(0); gpio <= S3C64XX_GPL(2); gpio++)
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(6));
+
+        /* Set Xhi ctrl pins as CF ctrl pins(IORDY, IOWR, IORD, CE[0:1]) */
+        s3c_gpio_cfgpin(S3C64XX_GPM(5), S3C_GPIO_SFN(1));
+        for (gpio = S3C64XX_GPM(0); gpio <= S3C64XX_GPM(4); gpio++)
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(6));
+}