From: Abhilash Kesavan <[email protected]> Adds support for HSMMC for S5P6440 and S5P6450, performs setup for host controller and related GPIO.
Signed-off-by: Abhilash Kesavan <[email protected]> Signed-off-by: Sangbeom Kim <[email protected]> --- arch/arm/mach-s5p64x0/Kconfig | 19 ++++++++ arch/arm/mach-s5p64x0/Makefile | 2 + arch/arm/mach-s5p64x0/setup-sdhci-gpio.c | 67 ++++++++++++++++++++++++++++++ arch/arm/mach-s5p64x0/setup-sdhci.c | 58 ++++++++++++++++++++++++++ 4 files changed, 146 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-s5p64x0/setup-sdhci-gpio.c create mode 100644 arch/arm/mach-s5p64x0/setup-sdhci.c diff --git a/arch/arm/mach-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig index 164d278..3946728 100644 --- a/arch/arm/mach-s5p64x0/Kconfig +++ b/arch/arm/mach-s5p64x0/Kconfig @@ -24,6 +24,17 @@ config S5P64X0_SETUP_I2C1 help Common setup code for i2c bus 1. +config S5P64X0_SETUP_SDHCI + bool + select S5P64X0_SETUP_SDHCI_GPIO + help + Internal helper functions for S5P64X0 based SDHCI systems + +config S5P64X0_SETUP_SDHCI_GPIO + bool + help + Common setup code for SDHCI gpio. + # machine support config MACH_SMDK6440 @@ -35,7 +46,11 @@ config MACH_SMDK6440 select S3C64XX_DEV_SPI select SAMSUNG_DEV_ADC select SAMSUNG_DEV_TS + select S3C_DEV_HSMMC + select S3C_DEV_HSMMC1 + select S3C_DEV_HSMMC2 select S5P64X0_SETUP_I2C1 + select S5P64X0_SETUP_SDHCI help Machine support for the Samsung SMDK6440 @@ -48,7 +63,11 @@ config MACH_SMDK6450 select S3C64XX_DEV_SPI select SAMSUNG_DEV_ADC select SAMSUNG_DEV_TS + select S3C_DEV_HSMMC + select S3C_DEV_HSMMC1 + select S3C_DEV_HSMMC2 select S5P64X0_SETUP_I2C1 + select S5P64X0_SETUP_SDHCI help Machine support for the Samsung SMDK6450 diff --git a/arch/arm/mach-s5p64x0/Makefile b/arch/arm/mach-s5p64x0/Makefile index 669f470..cbc9d1c 100644 --- a/arch/arm/mach-s5p64x0/Makefile +++ b/arch/arm/mach-s5p64x0/Makefile @@ -29,3 +29,5 @@ obj-y += dev-audio.o obj-$(CONFIG_S3C64XX_DEV_SPI) += dev-spi.o obj-$(CONFIG_S5P64X0_SETUP_I2C1) += setup-i2c1.o +obj-$(CONFIG_S5P64X0_SETUP_SDHCI) += setup-sdhci.o +obj-$(CONFIG_S5P64X0_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o diff --git a/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c b/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c new file mode 100644 index 0000000..3266c68 --- /dev/null +++ b/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c @@ -0,0 +1,67 @@ +/* linux/arch/arm/plat-s5p64x0/setup-sdhci-gpio.c + * + * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * S5P64X0 - 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/platform_device.h> +#include <linux/io.h> + +#include <mach/gpio.h> +#include <mach/regs-gpio.h> + +#include <plat/gpio-cfg.h> +#include <plat/sdhci.h> + +void s5p64x0_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width) +{ + struct s3c_sdhci_platdata *pdata = dev->dev.platform_data; + + /* Set all the necessary GPG pins to special-function 2 */ + s3c_gpio_cfgrange_nopull(S5P6450_GPG(0), 2 + width, S3C_GPIO_SFN(2)); + + /* Set GPG[6] pin to special-funtion 2 - MMC0 CDn */ + if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) { + s3c_gpio_setpull(S5P6450_GPG(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5P6450_GPG(6), S3C_GPIO_SFN(2)); + } +} + +void s5p64x0_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width) +{ + struct s3c_sdhci_platdata *pdata = dev->dev.platform_data; + + /* Set all the necessary GPH pins to special-function 2 */ + s3c_gpio_cfgrange_nopull(S5P6450_GPH(0), 2 + width, S3C_GPIO_SFN(2)); + + /* Set GPG[6] pin to special-funtion 3 - MMC1 CDn */ + if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) { + s3c_gpio_setpull(S5P6450_GPG(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5P6450_GPG(6), S3C_GPIO_SFN(3)); + } +} + +void s5p6440_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width) +{ + /* Set GPC[4:5] pins to special-function 3 - CLK and CMD */ + s3c_gpio_cfgrange_nopull(S5P6440_GPC(4), 2, S3C_GPIO_SFN(3)); + + /* Set GPH[6:9] pins to special-function 3 - Data[0:3] */ + s3c_gpio_cfgrange_nopull(S5P6440_GPH(6), 4, S3C_GPIO_SFN(3)); + + /* No MMC2 CDn available */ +} + +void s5p6450_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width) +{ + /* Set all the necessary GPG pins to special-function 2 */ + s3c_gpio_cfgrange_nopull(S5P6450_GPG(7), 2 + width, S3C_GPIO_SFN(3)); + + /* No MMC2 CDn available */ +} diff --git a/arch/arm/mach-s5p64x0/setup-sdhci.c b/arch/arm/mach-s5p64x0/setup-sdhci.c new file mode 100644 index 0000000..7ea4c0d --- /dev/null +++ b/arch/arm/mach-s5p64x0/setup-sdhci.c @@ -0,0 +1,58 @@ +/* linux/arch/arm/mach-s5p64x0/setup-sdhci.c + * + * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * S5P64X0 - Helper functions for setting 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/platform_device.h> +#include <linux/io.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 *s5p64x0_hsmmc_clksrcs[4] = { + /* [0] = NULL, - reserved */ + /* [1] = NULL, - reserved */ + [2] = "sclk_mmc", /* mmc_bus */ + /* [3] = NULL, - reserved */ +}; + +void s5p64x0_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 */ + + writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4); + + ctrl2 = readl(r + S3C_SDHCI_CONTROL2); + ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; + + /* + * clear async mode, enable conflict mask, rx feedback ctrl, SD clock + * hold and no use debounce count + */ + ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | + S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | + S3C_SDHCI_CTRL2_DFCNT_NONE | + S3C_SDHCI_CTRL2_ENCLKOUTHOLD); + + if (ios) + if (ios->clock > 400000) + ctrl2 |= S3C_SDHCI_CTRL2_ENFBCLKRX; + ctrl3 = 0; + + writel(ctrl2, r + S3C_SDHCI_CONTROL2); + writel(ctrl3, r + S3C_SDHCI_CONTROL3); +} -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
