diff options
| -rw-r--r-- | arch/arm/mach-s3c6410/Kconfig | 6 | ||||
| -rw-r--r-- | arch/arm/mach-s3c6410/Makefile | 4 | ||||
| -rw-r--r-- | arch/arm/mach-s3c6410/cpu.c | 4 | ||||
| -rw-r--r-- | arch/arm/mach-s3c6410/setup-sdhci.c | 102 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/dev-hsmmc.c | 37 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/include/plat/sdhci.h | 87 |
6 files changed, 232 insertions, 8 deletions
diff --git a/arch/arm/mach-s3c6410/Kconfig b/arch/arm/mach-s3c6410/Kconfig index d7ccc269086..32bdc93fc1f 100644 --- a/arch/arm/mach-s3c6410/Kconfig +++ b/arch/arm/mach-s3c6410/Kconfig @@ -14,9 +14,15 @@ config CPU_S3C6410 help Enable S3C6410 CPU support +config S3C6410_SETUP_SDHCI + bool + help + Internal helper functions for S3C6410 based SDHCI systems + config MACH_SMDK6410 bool "SMDK6410" select CPU_S3C6410 select S3C_DEV_HSMMC + select S3C6410_SETUP_SDHCI help Machine support for the Samsung SMDK6410 diff --git a/arch/arm/mach-s3c6410/Makefile b/arch/arm/mach-s3c6410/Makefile index 4a20a009990..2cd4f189036 100644 --- a/arch/arm/mach-s3c6410/Makefile +++ b/arch/arm/mach-s3c6410/Makefile @@ -14,6 +14,10 @@ obj- := obj-$(CONFIG_CPU_S3C6410) += cpu.o +# Helper and device support + +obj-$(CONFIG_S3C6410_SETUP_SDHCI) += setup-sdhci.o + # machine support obj-$(CONFIG_MACH_SMDK6410) += mach-smdk6410.o diff --git a/arch/arm/mach-s3c6410/cpu.c b/arch/arm/mach-s3c6410/cpu.c index 975cf88f0e8..84fb65b5999 100644 --- a/arch/arm/mach-s3c6410/cpu.c +++ b/arch/arm/mach-s3c6410/cpu.c @@ -35,6 +35,7 @@ #include <plat/cpu.h> #include <plat/devs.h> #include <plat/clock.h> +#include <plat/sdhci.h> #include <plat/s3c6400.h> #include <plat/s3c6410.h> @@ -51,6 +52,9 @@ static struct map_desc s3c6410_iodesc[] __initdata = { void __init s3c6410_map_io(void) { iotable_init(s3c6410_iodesc, ARRAY_SIZE(s3c6410_iodesc)); + + /* initialise device information early */ + s3c6410_default_sdhci0(); } void __init s3c6410_init_clocks(int xtal) diff --git a/arch/arm/mach-s3c6410/setup-sdhci.c b/arch/arm/mach-s3c6410/setup-sdhci.c new file mode 100644 index 00000000000..0b5788bd598 --- /dev/null +++ b/arch/arm/mach-s3c6410/setup-sdhci.c @@ -0,0 +1,102 @@ +/* linux/arch/arm/mach-s3c6410/setup-sdhci.c + * + * Copyright 2008 Simtec Electronics + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C6410 - 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 <mach/gpio.h> +#include <plat/gpio-cfg.h> +#include <plat/regs-sdhci.h> +#include <plat/sdhci.h> + +/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ + +char *s3c6410_hsmmc_clksrcs[4] = { + [0] = "hsmmc", + [1] = "hsmmc", + [2] = "mmc_bus", + /* [3] = "48m", - note not succesfully used yet */ +}; + +void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width) +{ + unsigned int gpio; + unsigned int end; + + end = S3C64XX_GPG(2 + width); + + /* Set all the necessary GPG pins to special-function 0 */ + for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2)); +} + +void s3c6410_setup_sdhci0_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; + ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | + S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | + S3C_SDHCI_CTRL2_ENFBCLKRX | + S3C_SDHCI_CTRL2_DFCNT_NONE | + S3C_SDHCI_CTRL2_ENCLKOUTHOLD); + + 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); + + 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); +} + +void s3c6410_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width) +{ + unsigned int gpio; + unsigned int end; + + end = S3C64XX_GPH(2 + width); + + /* Set all the necessary GPG pins to special-function 0 */ + for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3)); +} diff --git a/arch/arm/plat-s3c/dev-hsmmc.c b/arch/arm/plat-s3c/dev-hsmmc.c index 5a5ef74ebde..4c05b39810e 100644 --- a/arch/arm/plat-s3c/dev-hsmmc.c +++ b/arch/arm/plat-s3c/dev-hsmmc.c @@ -13,8 +13,10 @@ #include <linux/kernel.h> #include <linux/platform_device.h> +#include <linux/mmc/host.h> #include <mach/map.h> +#include <plat/sdhci.h> #include <plat/devs.h> #include <plat/cpu.h> @@ -35,13 +37,32 @@ static struct resource s3c_hsmmc_resource[] = { static u64 s3c_device_hsmmc_dmamask = 0xffffffffUL; +struct s3c_sdhci_platdata s3c_hsmmc0_def_platdata = { + .max_width = 4, + .host_caps = (MMC_CAP_4_BIT_DATA | + MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED), +}; + struct platform_device s3c_device_hsmmc0 = { - .name = "s3c-sdhci", - .id = 0, - .num_resources = ARRAY_SIZE(s3c_hsmmc_resource), - .resource = s3c_hsmmc_resource, - .dev = { - .dma_mask = &s3c_device_hsmmc_dmamask, - .coherent_dma_mask = 0xffffffffUL - } + .name = "s3c-sdhci", + .id = 0, + .num_resources = ARRAY_SIZE(s3c_hsmmc_resource), + .resource = s3c_hsmmc_resource, + .dev = { + .dma_mask = &s3c_device_hsmmc_dmamask, + .coherent_dma_mask = 0xffffffffUL, + .platform_data = &s3c_hsmmc0_def_platdata, + }, }; + +void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd) +{ + struct s3c_sdhci_platdata *set = &s3c_hsmmc0_def_platdata; + + set->max_width = pd->max_width; + + if (pd->cfg_gpio) + set->cfg_gpio = pd->cfg_gpio; + if (pd->cfg_card) + set->cfg_card = pd->cfg_card; +} diff --git a/arch/arm/plat-s3c/include/plat/sdhci.h b/arch/arm/plat-s3c/include/plat/sdhci.h new file mode 100644 index 00000000000..c9999121b4b --- /dev/null +++ b/arch/arm/plat-s3c/include/plat/sdhci.h @@ -0,0 +1,87 @@ +/* linux/arch/arm/plat-s3c/include/plat/sdhci.h + * + * Copyright 2008 Openmoko, Inc. + * Copyright 2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * S3C Platform - SDHCI (HSMMC) platform data definitions + * + * 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. +*/ + +#ifndef __PLAT_S3C_SDHCI_H +#define __PLAT_S3C_SDHCI_H __FILE__ + +struct platform_device; +struct mmc_host; +struct mmc_card; +struct mmc_ios; + +/** + * struct s3c_sdhci_platdata() - Platform device data for Samsung SDHCI + * @max_width: The maximum number of data bits supported. + * @host_caps: Standard MMC host capabilities bit field. + * @cfg_gpio: Configure the GPIO for a specific card bit-width + * @cfg_card: Configure the interface for a specific card and speed. This + * is necessary the controllers and/or GPIO blocks require the + * changing of driver-strength and other controls dependant on + * the card and speed of operation. + * + * Initialisation data specific to either the machine or the platform + * for the device driver to use or call-back when configuring gpio or + * card speed information. +*/ +struct s3c_sdhci_platdata { + unsigned int max_width; + unsigned int host_caps; + + char **clocks; /* set of clock sources */ + + void (*cfg_gpio)(struct platform_device *dev, int width); + void (*cfg_card)(struct platform_device *dev, + void __iomem *regbase, + struct mmc_ios *ios, + struct mmc_card *card); +}; + +/** + * s3c_sdhci0_set_platdata - Set platform data for S3C SDHCI device. + * @pd: Platform data to register to device. + * + * Register the given platform data for use withe S3C SDHCI device. + * The call will copy the platform data, so the board definitions can + * make the structure itself __initdata. + */ +extern void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd); + +/* Default platform data, exported so that per-cpu initialisation can + * set the correct one when there are more than one cpu type selected. +*/ + +extern struct s3c_sdhci_platdata s3c_hsmmc0_def_platata; + +/* Helper function availablity */ + +#ifdef CONFIG_S3C6410_SETUP_SDHCI +extern char *s3c6410_hsmmc_clksrcs[4]; + +extern void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *, int w); +extern void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev, + void __iomem *r, + struct mmc_ios *ios, + struct mmc_card *card); + +static inline void s3c6410_default_sdhci0(void) +{ + s3c_hsmmc0_def_platdata.clocks = s3c6410_hsmmc_clksrcs; + s3c_hsmmc0_def_platdata.cfg_gpio = s3c6410_setup_sdhci0_cfg_gpio; + s3c_hsmmc0_def_platdata.cfg_card = s3c6410_setup_sdhci0_cfg_card; +} +#else +static inline void s3c6410_default_sdhci0(void) { } +#endif /* CONFIG_S3C6410_SETUP_SDHCI */ + +#endif /* __PLAT_S3C_SDHCI_H */ |