Hello, On Thursday, September 16, 2010 10:37 AM Jeongbae Seo wrote: > From: Hyuk Lee <hyuk1.lee@xxxxxxxxxxx> > > 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@xxxxxxxxxxx> > Signed-off-by: Jeongbae Seo <jeongbae.seo@xxxxxxxxxxx> > --- > 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 > <snip> > 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); Lack of "s5p_gpio_set_drvstr(gpio, S5P_GPIO_DRVSTR_LV4)" here causes problems with Universal C210 and external SD-card. IMHO driver strength should be set for all MMC pins, not only for data pins like below (and do this for all MMC blocks of course). > + } > + > + 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); > + } > +} <snip> Best regards -- Marek Szyprowski Samsung Poland R&D Center -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
