On Thu, Sep 16, 2010 at 5:36 PM, Jeongbae Seo <jeongbae.seo@xxxxxxxxxxx> 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 > > 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. I think it's not needed since most boards have fixed bandwith and cfg_gpio handle it regardless these configuration. Also we use the select state if needed, e.g., when MMC0 uses 8-buswidth then don't select MMC1. I saw the SMDK board use this configuration. but just choose bandwidth 4 or 8. Others good. Thank you, Kyungmin Park > + > +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 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- 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
