[PATCH 15/17] ARM: S5PC1xx: add platform helpers for SDHCI host controllers
Marek Szyprowski
m.szyprowski at samsung.com
Tue Oct 13 04:11:20 EDT 2009
Samsung S5PC100 has 3 SDHCI controllers compatible with the one known from
previous SoCs series. Add required platform setup and support code that
the devices can be used with sdhci-s3c driver.
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
---
arch/arm/mach-s5pc100/Kconfig | 6 ++
arch/arm/mach-s5pc100/Makefile | 4 ++
arch/arm/mach-s5pc100/cpu.c | 3 +
arch/arm/mach-s5pc100/setup-sdhci.c | 63 ++++++++++++++++++++++
arch/arm/plat-s3c/Kconfig | 5 ++
arch/arm/plat-s3c/Makefile | 1 +
arch/arm/plat-s3c/dev-hsmmc2.c | 65 ++++++++++++++++++++++
arch/arm/plat-s3c/include/plat/sdhci.h | 55 +++++++++++++++++++
arch/arm/plat-s5pc1xx/Kconfig | 6 ++
arch/arm/plat-s5pc1xx/Makefile | 1 +
arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c | 86 ++++++++++++++++++++++++++++++
11 files changed, 295 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5pc100/setup-sdhci.c
create mode 100644 arch/arm/plat-s3c/dev-hsmmc2.c
create mode 100644 arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
diff --git a/arch/arm/mach-s5pc100/Kconfig b/arch/arm/mach-s5pc100/Kconfig
index 36e7e00..21b1821 100644
--- a/arch/arm/mach-s5pc100/Kconfig
+++ b/arch/arm/mach-s5pc100/Kconfig
@@ -14,6 +14,12 @@ config CPU_S5PC100
help
Enable S5PC100 CPU support
+config S5PC100_SETUP_SDHCI
+ bool
+ select S5PC1XX_SETUP_SDHCI_GPIO
+ help
+ Internal helper functions for S5PC100 based SDHCI systems
+
config MACH_SMDKC100
bool "SMDKC100"
select CPU_S5PC100
diff --git a/arch/arm/mach-s5pc100/Makefile b/arch/arm/mach-s5pc100/Makefile
index afc89b3..809ff10 100644
--- a/arch/arm/mach-s5pc100/Makefile
+++ b/arch/arm/mach-s5pc100/Makefile
@@ -13,5 +13,9 @@ obj- :=
obj-$(CONFIG_CPU_S5PC100) += cpu.o
+# Helper and device support
+
+obj-$(CONFIG_S5PC100_SETUP_SDHCI) += setup-sdhci.o
+
# machine support
obj-$(CONFIG_MACH_SMDKC100) += mach-smdkc100.o
diff --git a/arch/arm/mach-s5pc100/cpu.c b/arch/arm/mach-s5pc100/cpu.c
index 1319e3d..d79e757 100644
--- a/arch/arm/mach-s5pc100/cpu.c
+++ b/arch/arm/mach-s5pc100/cpu.c
@@ -75,6 +75,9 @@ void __init s5pc100_map_io(void)
iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
/* initialise device information early */
+ s5pc100_default_sdhci0();
+ s5pc100_default_sdhci1();
+ s5pc100_default_sdhci2();
/* the i2c devices are directly compatible with s3c2440 */
s3c_i2c0_setname("s3c2440-i2c");
diff --git a/arch/arm/mach-s5pc100/setup-sdhci.c b/arch/arm/mach-s5pc100/setup-sdhci.c
new file mode 100644
index 0000000..634bac3
--- /dev/null
+++ b/arch/arm/mach-s5pc100/setup-sdhci.c
@@ -0,0 +1,63 @@
+/* linux/arch/arm/mach-s5pc100/setup-sdhci.c
+ *
+ * Copyright 2008 Samsung Electronics
+ *
+ * S5PC100 - Helper functions for settign up SDHCI device(s) (HSMMC)
+ *
+ * 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 *s5pc100_hsmmc_clksrcs[4] = {
+ [0] = "hsmmc",
+ [1] = "hsmmc",
+ /* [2] = "mmc_bus", not yet succesfuuly used yet */
+ /* [3] = "48m", - note not succesfully used yet */
+};
+
+
+void s5pc100_setup_sdhci0_cfg_card(struct platform_device *dev,
+ void __iomem *r,
+ struct mmc_ios *ios,
+ struct mmc_card *card)
+{
+ u32 ctrl2, ctrl3;
+
+ /* don't need to alter anything acording to card-type */
+
+ writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
+
+ 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-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index f155a84..e139a72 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -184,6 +184,11 @@ config S3C_DEV_HSMMC1
help
Compile in platform device definitions for HSMMC channel 1
+config S3C_DEV_HSMMC2
+ bool
+ help
+ Compile in platform device definitions for HSMMC channel 2
+
config S3C_DEV_I2C1
bool
help
diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
index 3c09109..50444da 100644
--- a/arch/arm/plat-s3c/Makefile
+++ b/arch/arm/plat-s3c/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_HAVE_PWM) += pwm.o
obj-$(CONFIG_S3C_DEV_HSMMC) += dev-hsmmc.o
obj-$(CONFIG_S3C_DEV_HSMMC1) += dev-hsmmc1.o
+obj-$(CONFIG_S3C_DEV_HSMMC2) += dev-hsmmc2.o
obj-y += dev-i2c0.o
obj-$(CONFIG_S3C_DEV_I2C1) += dev-i2c1.o
obj-$(CONFIG_S3C_DEV_FB) += dev-fb.o
diff --git a/arch/arm/plat-s3c/dev-hsmmc2.c b/arch/arm/plat-s3c/dev-hsmmc2.c
new file mode 100644
index 0000000..082e55a
--- /dev/null
+++ b/arch/arm/plat-s3c/dev-hsmmc2.c
@@ -0,0 +1,65 @@
+/* linux/arch/arm/plat-s3c/dev-hsmmc2.c
+ *
+ * Copyright (c) 2009 Samsung Electronics
+ *
+ * S3C series device definition for hsmmc device 2
+ *
+ * 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/platform_device.h>
+#include <linux/mmc/host.h>
+
+#include <mach/map.h>
+#include <plat/sdhci.h>
+#include <plat/devs.h>
+
+#define S3C_SZ_HSMMC (0x1000)
+
+static struct resource s3c_hsmmc2_resource[] = {
+ [0] = {
+ .start = S3C_PA_HSMMC2,
+ .end = S3C_PA_HSMMC2 + S3C_SZ_HSMMC - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_HSMMC2,
+ .end = IRQ_HSMMC2,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static u64 s3c_device_hsmmc2_dmamask = 0xffffffffUL;
+
+struct s3c_sdhci_platdata s3c_hsmmc2_def_platdata = {
+ .max_width = 4,
+ .host_caps = (MMC_CAP_4_BIT_DATA |
+ MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED),
+};
+
+struct platform_device s3c_device_hsmmc2 = {
+ .name = "s3c-sdhci",
+ .id = 2,
+ .num_resources = ARRAY_SIZE(s3c_hsmmc2_resource),
+ .resource = s3c_hsmmc2_resource,
+ .dev = {
+ .dma_mask = &s3c_device_hsmmc2_dmamask,
+ .coherent_dma_mask = 0xffffffffUL,
+ .platform_data = &s3c_hsmmc2_def_platdata,
+ },
+};
+
+void s3c_sdhci2_set_platdata(struct s3c_sdhci_platdata *pd)
+{
+ struct s3c_sdhci_platdata *set = &s3c_hsmmc2_def_platdata;
+
+ set->max_width = pd->max_width;
+
+ if (pd->cfg_gpio)
+ set->cfg_gpio = pd->cfg_gpio;
+ if (pd->cfg_card)
+ set->cfg_card = pd->cfg_card;
+}
diff --git a/arch/arm/plat-s3c/include/plat/sdhci.h b/arch/arm/plat-s3c/include/plat/sdhci.h
index f615308..c71d078 100644
--- a/arch/arm/plat-s3c/include/plat/sdhci.h
+++ b/arch/arm/plat-s3c/include/plat/sdhci.h
@@ -57,6 +57,7 @@ struct s3c_sdhci_platdata {
*/
extern void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd);
extern void s3c_sdhci1_set_platdata(struct s3c_sdhci_platdata *pd);
+extern void s3c_sdhci2_set_platdata(struct s3c_sdhci_platdata *pd);
/* Default platform data, exported so that per-cpu initialisation can
* set the correct one when there are more than one cpu type selected.
@@ -64,11 +65,15 @@ extern void s3c_sdhci1_set_platdata(struct s3c_sdhci_platdata *pd);
extern struct s3c_sdhci_platdata s3c_hsmmc0_def_platdata;
extern struct s3c_sdhci_platdata s3c_hsmmc1_def_platdata;
+extern struct s3c_sdhci_platdata s3c_hsmmc2_def_platdata;
/* Helper function availablity */
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);
+extern void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
+extern void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *, int w);
/* S3C6400 SDHCI setup */
@@ -145,4 +150,54 @@ static inline void s3c6410_default_sdhci0(void) { }
static inline void s3c6410_default_sdhci1(void) { }
#endif /* CONFIG_S3C6410_SETUP_SDHCI */
+/* S5PC100 SDHCI setup */
+
+#ifdef CONFIG_S5PC100_SETUP_SDHCI
+extern char *s5pc100_hsmmc_clksrcs[4];
+
+extern void s5pc100_setup_sdhci0_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 s5pc100_default_sdhci0(void)
+{
+ s3c_hsmmc0_def_platdata.clocks = s5pc100_hsmmc_clksrcs;
+ s3c_hsmmc0_def_platdata.cfg_gpio = s5pc100_setup_sdhci0_cfg_gpio;
+ s3c_hsmmc0_def_platdata.cfg_card = s5pc100_setup_sdhci0_cfg_card;
+}
+#else
+static inline void s5pc100_default_sdhci0(void) { }
+#endif /* CONFIG_S3C_DEV_HSMMC */
+
+#ifdef CONFIG_S3C_DEV_HSMMC1
+static inline void s5pc100_default_sdhci1(void)
+{
+ s3c_hsmmc1_def_platdata.clocks = s5pc100_hsmmc_clksrcs;
+ s3c_hsmmc1_def_platdata.cfg_gpio = s5pc100_setup_sdhci1_cfg_gpio;
+ s3c_hsmmc1_def_platdata.cfg_card = s5pc100_setup_sdhci0_cfg_card;
+}
+#else
+static inline void s5pc100_default_sdhci1(void) { }
+#endif /* CONFIG_S3C_DEV_HSMMC1 */
+
+#ifdef CONFIG_S3C_DEV_HSMMC2
+static inline void s5pc100_default_sdhci2(void)
+{
+ s3c_hsmmc2_def_platdata.clocks = s5pc100_hsmmc_clksrcs;
+ s3c_hsmmc2_def_platdata.cfg_gpio = s5pc100_setup_sdhci2_cfg_gpio;
+ s3c_hsmmc2_def_platdata.cfg_card = s5pc100_setup_sdhci0_cfg_card;
+}
+#else
+static inline void s5pc100_default_sdhci2(void) { }
+#endif /* CONFIG_S3C_DEV_HSMMC1 */
+
+
+#else
+static inline void s5pc100_default_sdhci0(void) { }
+static inline void s5pc100_default_sdhci1(void) { }
+static inline void s5pc100_default_sdhci2(void) { }
+#endif /* CONFIG_S5PC100_SETUP_SDHCI */
+
#endif /* __PLAT_S3C_SDHCI_H */
diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index 1fc25b9..1608e62 100644
--- a/arch/arm/plat-s5pc1xx/Kconfig
+++ b/arch/arm/plat-s5pc1xx/Kconfig
@@ -55,4 +55,10 @@ config S5PC1XX_SETUP_I2C1
bool
help
Common setup code for i2c bus 1.
+
+config S5PC1XX_SETUP_SDHCI_GPIO
+ bool
+ help
+ Common setup code for SDHCI gpio.
+
endif
diff --git a/arch/arm/plat-s5pc1xx/Makefile b/arch/arm/plat-s5pc1xx/Makefile
index 15c800e..66a8f3e 100644
--- a/arch/arm/plat-s5pc1xx/Makefile
+++ b/arch/arm/plat-s5pc1xx/Makefile
@@ -27,3 +27,4 @@ obj-$(CONFIG_CPU_S5PC100_CLOCK) += s5pc100-clock.o
obj-$(CONFIG_S5PC1XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
obj-$(CONFIG_S5PC1XX_SETUP_I2C0) += setup-i2c0.o
obj-$(CONFIG_S5PC1XX_SETUP_I2C1) += setup-i2c1.o
+obj-$(CONFIG_S5PC1XX_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
diff --git a/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c b/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
new file mode 100644
index 0000000..3577619
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
@@ -0,0 +1,86 @@
+/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
+ *
+ * Copyright 2009 Samsung Eletronics
+ *
+ * S5PC1XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
+ *
+ * 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/host.h>
+#include <linux/mmc/card.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-cfg.h>
+#include <plat/regs-sdhci.h>
+
+void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+ unsigned int gpio;
+ unsigned int end;
+ unsigned int num;
+
+ num = width;
+ /* In case of 8 width, we should decrease the 2 */
+ if (width == 8)
+ num = width - 2;
+
+ end = S5PC100_GPG0(2 + num);
+
+ /* Set all the necessary GPG0/GPG1 pins to special-function 0 */
+ for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ if (width == 8) {
+ for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+ }
+
+ s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2));
+}
+
+void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+ unsigned int gpio;
+ unsigned int end;
+
+ end = S5PC100_GPG2(2 + width);
+
+ /* Set all the necessary GPG2 pins to special-function 2 */
+ for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2));
+}
+
+void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+ unsigned int gpio;
+ unsigned int end;
+
+ end = S5PC100_GPG3(2 + width);
+
+ /* Set all the necessary GPG3 pins to special-function 2 */
+ for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2));
+}
--
1.6.4
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