[PATCH v2] ARM: S3C2416: Add platform helpers for setup SDHCI
Yauhen Kharuzhy
yauhen.kharuzhy at promwad.com
Wed Dec 1 04:57:41 EST 2010
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 at promwad.com>
---
arch/arm/mach-s3c2416/Kconfig | 12 +++++
arch/arm/mach-s3c2416/Makefile | 4 ++
arch/arm/mach-s3c2416/s3c2416.c | 5 ++
arch/arm/mach-s3c2416/setup-sdhci-gpio.c | 34 +++++++++++++++
arch/arm/mach-s3c2416/setup-sdhci.c | 61 ++++++++++++++++++++++++++++
arch/arm/plat-samsung/include/plat/sdhci.h | 30 ++++++++++++++
6 files changed, 146 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 27b3e7c..2eaadcf 100644
--- a/arch/arm/mach-s3c2416/Kconfig
+++ b/arch/arm/mach-s3c2416/Kconfig
@@ -30,6 +30,17 @@ 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
@@ -41,6 +52,7 @@ 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 ef038d6..7b805b2 100644
--- 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 63f39cd..ba7fd87 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>
#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
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 at 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
index 0000000..f09e38f
--- /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 at 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 85853f8..87e621c 100644
--- 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 +124,34 @@ 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);
+#endif /* CONFIG_S3C2416_SETUP_SDHCI */
+
+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 */
+}
+
/* S3C64XX SDHCI setup */
#ifdef CONFIG_S3C64XX_SETUP_SDHCI
--
1.7.2.3
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