From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.szyprowski@samsung.com (Marek Szyprowski) Date: Mon, 04 Oct 2010 13:03:44 +0200 Subject: [PATCH 1/5] ARM: S5PV310: Add HSMMC support and SDHCI configuration In-Reply-To: <1284626223-18944-2-git-send-email-jeongbae.seo@samsung.com> References: <1284626223-18944-1-git-send-email-jeongbae.seo@samsung.com> <1284626223-18944-2-git-send-email-jeongbae.seo@samsung.com> Message-ID: <012d01cb63b3$d26bb140$774313c0$%szyprowski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello, On Thursday, September 16, 2010 10:37 AM Jeongbae Seo wrote: > From: Hyuk Lee > > 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 > Signed-off-by: Jeongbae Seo > --- > 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/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 > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > + > +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); > + } > +} Best regards -- Marek Szyprowski Samsung Poland R&D Center