This patch adds SDHCI card and GPIO configuration support for Samsung's S5P6440 SoC.
Signed-off-by: Thomas Abraham <[email protected]> --- arch/arm/mach-s5p6440/Makefile | 1 + arch/arm/mach-s5p6440/setup-sdhci.c | 104 +++++++++++++++++++++++++++++++++++ 2 files changed, 105 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-s5p6440/setup-sdhci.c diff --git a/arch/arm/mach-s5p6440/Makefile b/arch/arm/mach-s5p6440/Makefile index 70fbf32..8110570 100644 --- a/arch/arm/mach-s5p6440/Makefile +++ b/arch/arm/mach-s5p6440/Makefile @@ -13,6 +13,7 @@ obj- := # Core support for S5P6440 system obj-$(CONFIG_CPU_S5P6440) += cpu.o init.o clock.o gpio.o irq-eint.o +obj-$(CONFIG_S5P6440_SETUP_SDHCI) += setup-sdhci.o # machine support diff --git a/arch/arm/mach-s5p6440/setup-sdhci.c b/arch/arm/mach-s5p6440/setup-sdhci.c new file mode 100644 index 0000000..e1c3b1a --- /dev/null +++ b/arch/arm/mach-s5p6440/setup-sdhci.c @@ -0,0 +1,104 @@ +/* linux/arch/arm/mach-s5p6440/setup-sdhci.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * Based on arch/arm/mach-s3c64xx/setup-sdhci.c + * + * S3C6440 - 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> +#include <plat/sdhci.h> + +#include <mach/gpio.h> +#include <plat/gpio-cfg.h> +#include <mach/regs-gpio.h> + +/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ +static char *s5p6440_hsmmc_clksrcs[4] = { + [0] = "hsmmc", + [1] = "hsmmc", + [2] = "mmc_bus", +}; + +static void s5p6440_setup_sdhci_cfg_card(struct platform_device *dev, + void __iomem *r, + struct mmc_ios *ios, + struct mmc_card *card) +{ + u32 ctrl2, ctrl3 = 0; + + writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4); + + ctrl2 = readl(r + S3C_SDHCI_CONTROL2); + ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; + ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | + S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | + S3C_SDHCI_CTRL2_DFCNT_NONE | + S3C_SDHCI_CTRL2_ENCLKOUTHOLD | (2<<4)); + + printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3); + writel(ctrl2, r + S3C_SDHCI_CONTROL2); + writel(ctrl3, r + S3C_SDHCI_CONTROL3); +} + +static void s5p6440_setup_sdhci0_cfg_gpio(struct platform_device *dev, + int width) +{ + unsigned int gpio; + unsigned int end; + + end = S5P6440_GPG(2 + width); + + /* Set all the necessary GPG pins to special-function 0 */ + for (gpio = S5P6440_GPG(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } +} + +static void s5p6440_setup_sdhci1_cfg_gpio(struct platform_device *dev, + int width) +{ + unsigned int gpio; + unsigned int end; + + end = S5P6440_GPH(2 + width); + + /* Set all the necessary GPG pins to special-function 0 */ + for (gpio = S5P6440_GPH(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + s3c_gpio_setpull(S5P6440_GPG(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5P6440_GPG(6), S3C_GPIO_SFN(3)); +} + +void s5p6440_setup_sdhci(void) +{ + struct s3c_sdhci_platdata *pdata; + + pdata = &s3c_hsmmc0_def_platdata; + pdata->clocks = s5p6440_hsmmc_clksrcs; + pdata->cfg_gpio = s5p6440_setup_sdhci0_cfg_gpio; + pdata->cfg_card = s5p6440_setup_sdhci_cfg_card; + + pdata = &s3c_hsmmc1_def_platdata; + pdata->clocks = s5p6440_hsmmc_clksrcs; + pdata->cfg_gpio = s5p6440_setup_sdhci1_cfg_gpio; + pdata->cfg_card = s5p6440_setup_sdhci_cfg_card; +} -- 1.6.6.rc2 -- 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
