[PATCH 1/5] ARM: S5PV310: Add HSMMC support and SDHCI configuration

Jeongbae Seo
2010-09-16T08:36:59Z

From: Hyuk Lee <hyuk1.lee@samsung.com>

This patch adds to support HSMMC for S5PV310 and S5PC210 and setup for
HSMMC host controller and also related GPIO.
At most 4 channel can be used at the same time.
A user can configure SDHCI data bus as 8bit or 4bit.

Signed-off-by: Hyuk Lee <hyuk1.lee@samsung.com>
Signed-off-by: Jeongbae Seo <jeongbae.seo@samsung.com>
---
arch/arm/mach-s5pv310/Kconfig | 39 ++++++++
arch/arm/mach-s5pv310/Makefile | 2 +
arch/arm/mach-s5pv310/setup-sdhci-gpio.c | 156 ++++++++++++++++++++++++++++++
arch/arm/mach-s5pv310/setup-sdhci.c | 69 +++++++++++++
4 files changed, 266 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5pv310/setup-sdhci-gpio.c
create mode 100644 arch/arm/mach-s5pv310/setup-sdhci.c

diff --git a/arch/arm/mach-s5pv310/Kconfig b/arch/arm/mach-s5pv310/Kconfig
index 9ac29fe..6a07968 100644
--- a/arch/arm/mach-s5pv310/Kconfig
+++ b/arch/arm/mach-s5pv310/Kconfig
@@ -25,6 +25,17 @@ config S5PV310_SETUP_I2C2
help
Common setup code for i2c bus 2.

+config S5PV310_SETUP_SDHCI
+ bool
+ select S5PV310_SETUP_SDHCI_GPIO
+ help
+ Internal helper functions for S5PV310 based SDHCI systems.
+
+config S5PV310_SETUP_SDHCI_GPIO
+ bool
+ help
+ Common setup code for SDHCI gpio.
+
# machine support

menu "S5PC210 Machines"
@@ -33,6 +44,11 @@ config MACH_SMDKC210
bool "SMDKC210"
select CPU_S5PV310
select ARCH_SPARSEMEM_ENABLE
+ select S3C_DEV_HSMMC
+ select S3C_DEV_HSMMC1
+ select S3C_DEV_HSMMC2
+ select S3C_DEV_HSMMC3
+ select S5PV310_SETUP_SDHCI
help
Machine support for Samsung SMDKC210
S5PC210(MCP) is one of package option of S5PV310
@@ -53,9 +69,32 @@ config MACH_SMDKV310
bool "SMDKV310"
select CPU_S5PV310
select ARCH_SPARSEMEM_ENABLE
+ select S3C_DEV_HSMMC
+ select S3C_DEV_HSMMC1
+ select S3C_DEV_HSMMC2
+ select S3C_DEV_HSMMC3
+ select S5PV310_SETUP_SDHCI
help
Machine support for Samsung SMDKV310

endmenu

+comment "Configuration for HSMMC bus width"
+
+menu "Use 8-bit bus width"
+
+config S5PV310_SDHCI_CH0_8BIT
+ bool "Channel 0 with 8-bit bus"
+ help
+ Support HSMMC Channel 0 8-bit bus.
+ If selected, Channel 1 is disabled.
+
+config S5PV310_SDHCI_CH2_8BIT
+ bool "Channel 2 with 8-bit bus"
+ help
+ Support HSMMC Channel 2 8-bit bus.
+ If selected, Channel 3 is disabled.
+
+endmenu
+
endif
diff --git a/arch/arm/mach-s5pv310/Makefile b/arch/arm/mach-s5pv310/Makefile
index aefb14f..c89b6b0 100644
--- a/arch/arm/mach-s5pv310/Makefile
+++ b/arch/arm/mach-s5pv310/Makefile
@@ -29,3 +29,5 @@ obj-$(CONFIG_MACH_UNIVERSAL_C210) += mach-universal_c210.o

obj-$(CONFIG_S5PV310_SETUP_I2C1) += setup-i2c1.o
obj-$(CONFIG_S5PV310_SETUP_I2C2) += setup-i2c2.o
+obj-$(CONFIG_S5PV310_SETUP_SDHCI) += setup-sdhci.o
+obj-$(CONFIG_S5PV310_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
diff --git a/arch/arm/mach-s5pv310/setup-sdhci-gpio.c b/arch/arm/mach-s5pv310/setup-sdhci-gpio.c
new file mode 100644
index 0000000..8db8c81
--- /dev/null
+++ b/arch/arm/mach-s5pv310/setup-sdhci-gpio.c
@@ -0,0 +1,156 @@
+/* linux/arch/arm/mach-s5pv310/setup-sdhci-gpio.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5PV310 - 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/gpio.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+
+#include <plat/gpio-cfg.h>
+#include <plat/regs-sdhci.h>
+#include <plat/sdhci.h>
+
+void s5pv310_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+ struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
+ unsigned int gpio;
+
+ /* Set all the necessary GPK0[0:1] pins to special-function 2 */
+ for (gpio = S5PV310_GPK0(0); gpio < S5PV310_GPK0(2); gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ switch (width) {
+ case 8:
+ for (gpio = S5PV310_GPK1(3); gpio <= S5PV310_GPK1(6); gpio++) {
+ /* Data pin GPK1[3:6] to special-funtion 3 */
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
+
+ /* Setup Drive Strength */
+ s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4);
+ }
+ case 4:
+ for (gpio = S5PV310_GPK0(3); gpio <= S5PV310_GPK0(6); gpio++) {
+ /* Data pin GPK0[3:6] to special-funtion 2 */
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
+
+ /* Setup Drive Strength */
+ s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4);
+ }
+ default:
+ break;
+ }
+
+ if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+ s3c_gpio_cfgpin(S5PV310_GPK0(2), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5PV310_GPK0(2), S3C_GPIO_PULL_UP);
+ }
+}
+
+void s5pv310_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+ struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
+ unsigned int gpio;
+
+ /* Set all the necessary GPK1[0:1] pins to special-function 2 */
+ for (gpio = S5PV310_GPK1(0); gpio < S5PV310_GPK1(2); gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ for (gpio = S5PV310_GPK1(3); gpio <= S5PV310_GPK1(6); gpio++) {
+ /* Data pin GPK1[3:6] to special-function 2 */
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
+
+ /* Setup Drive Strength */
+ s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4);
+ }
+
+ if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+ s3c_gpio_cfgpin(S5PV310_GPK1(2), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5PV310_GPK1(2), S3C_GPIO_PULL_UP);
+ }
+}
+
+void s5pv310_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+ struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
+ unsigned int gpio;
+
+ /* Set all the necessary GPK2[0:1] pins to special-function 2 */
+ for (gpio = S5PV310_GPK2(0); gpio < S5PV310_GPK2(2); gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ switch (width) {
+ case 8:
+ for (gpio = S5PV310_GPK3(3); gpio <= S5PV310_GPK3(6); gpio++) {
+ /* Data pin GPK3[3:6] to special-function 3 */
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
+
+ /* Setup Drive Strength */
+ s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4);
+ }
+ case 4:
+ for (gpio = S5PV310_GPK2(3); gpio <= S5PV310_GPK2(6); gpio++) {
+ /* Data pin GPK2[3:6] to special-function 2 */
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
+
+ /* Setup Drive Strength */
+ s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4);
+ }
+ default:
+ break;
+ }
+
+ if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+ s3c_gpio_cfgpin(S5PV310_GPK2(2), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5PV310_GPK2(2), S3C_GPIO_PULL_UP);
+ }
+}
+
+void s5pv310_setup_sdhci3_cfg_gpio(struct platform_device *dev, int width)
+{
+ struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
+ unsigned int gpio;
+
+ /* Set all the necessary GPK3[0:1] pins to special-function 2 */
+ for (gpio = S5PV310_GPK3(0); gpio < S5PV310_GPK3(2); gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ for (gpio = S5PV310_GPK3(3); gpio <= S5PV310_GPK3(6); gpio++) {
+ /* Data pin GPK3[3:6] to special-function 2 */
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
+
+ /* Setup Drive Strength */
+ s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4);
+ }
+
+ if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+ s3c_gpio_cfgpin(S5PV310_GPK3(2), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5PV310_GPK3(2), S3C_GPIO_PULL_UP);
+ }
+}
diff --git a/arch/arm/mach-s5pv310/setup-sdhci.c b/arch/arm/mach-s5pv310/setup-sdhci.c
new file mode 100644
index 0000000..db8358f
--- /dev/null
+++ b/arch/arm/mach-s5pv310/setup-sdhci.c
@@ -0,0 +1,69 @@
+/* linux/arch/arm/mach-s5pv310/setup-sdhci.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5PV310 - 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>
+
+/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
+
+char *s5pv310_hsmmc_clksrcs[4] = {
+ [0] = NULL,
+ [1] = NULL,
+ [2] = "sclk_mmc", /* mmc_bus */
+ [3] = NULL,
+};
+
+void s5pv310_setup_sdhci_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 */
+
+ ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
+
+ /* select base clock source to HCLK */
+
+ ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
+
+ /*
+ * clear async mode, enable conflict mask, rx feedback ctrl, SD
+ * clk hold and no use debounce count
+ */
+
+ ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
+ S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
+ S3C_SDHCI_CTRL2_ENFBCLKRX |
+ S3C_SDHCI_CTRL2_DFCNT_NONE |
+ S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
+
+ /* Tx and Rx feedback clock delay control */
+
+ 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);
+}
--
1.6.2.5