This adds code to enable MMC on mahimahi. This code was taken from Google's tree, with slight modifications and clean up.
Signed-off-by: Daniel Walker <[email protected]> --- arch/arm/mach-msm/Makefile | 1 + arch/arm/mach-msm/board-mahimahi-mmc.c | 206 ++++++++++++++++++++++++++++++++ 2 files changed, 207 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-msm/board-mahimahi-mmc.c diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile index a0ebce4..5012c37 100644 --- a/arch/arm/mach-msm/Makefile +++ b/arch/arm/mach-msm/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_ARCH_MSM7X30) += board-msm7x30.o devices-msm7x30.o obj-$(CONFIG_ARCH_QSD8X50) += board-qsd8x50.o devices-qsd8x50.o obj-$(CONFIG_ARCH_MSM8X60) += board-msm8x60.o obj-$(CONFIG_MACH_MAHIMAHI) += board-mahimahi.o +obj-$(CONFIG_MACH_MAHIMAHI) += board-mahimahi-mmc.o obj-$(CONFIG_ARCH_MSM7X30) += gpiomux-7x30.o gpiomux-v1.o gpiomux.o obj-$(CONFIG_ARCH_QSD8X50) += gpiomux-8x50.o gpiomux-v1.o gpiomux.o diff --git a/arch/arm/mach-msm/board-mahimahi-mmc.c b/arch/arm/mach-msm/board-mahimahi-mmc.c new file mode 100644 index 0000000..991818e --- /dev/null +++ b/arch/arm/mach-msm/board-mahimahi-mmc.c @@ -0,0 +1,206 @@ +/* linux/arch/arm/mach-msm/board-mahimahi-mmc.c + * + * Copyright (C) 2009 Google, Inc. + * Copyright (C) 2009 HTC Corporation + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#define pr_fmt(fmt) "%s: " fmt, __func__ + +#include <linux/delay.h> +#include <linux/debugfs.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mmc/host.h> +#include <linux/mmc/sdio_ids.h> +#include <linux/platform_device.h> + +#include <asm/gpio.h> +#include <asm/io.h> +#include <asm/mach-types.h> +#include <mach/mmc.h> + +#include <mach/vreg.h> + +#include "board-mahimahi.h" +#include "devices.h" +#include "proc_comm.h" + +static bool opt_disable_sdcard; +static int __init mahimahi_disablesdcard_setup(char *str) +{ + opt_disable_sdcard = (bool)simple_strtol(str, NULL, 0); + return 1; +} + +__setup("board_mahimahi.disable_sdcard=", mahimahi_disablesdcard_setup); + +static struct msm_mmc_gpio sdc1_gpio_cfg[] = { + {62, "sdc1_clk"}, + {63, "sdc1_cmd"}, + {64, "sdc1_dat_3"}, + {65, "sdc1_dat_2"}, + {66, "sdc1_dat_1"}, + {67, "sdc1_dat_0"}, +}; + +static struct vreg *sdslot_vreg; +static uint32_t sdslot_vdd = 0xffffffff; +static uint32_t sdslot_vreg_enabled; + +static struct { + int mask; + int level; +} mmc_vdd_table[] = { + { MMC_VDD_165_195, 1800 }, + { MMC_VDD_20_21, 2050 }, + { MMC_VDD_21_22, 2150 }, + { MMC_VDD_22_23, 2250 }, + { MMC_VDD_23_24, 2350 }, + { MMC_VDD_24_25, 2450 }, + { MMC_VDD_25_26, 2550 }, + { MMC_VDD_26_27, 2650 }, + { MMC_VDD_27_28, 2750 }, + { MMC_VDD_28_29, 2850 }, + { MMC_VDD_29_30, 2950 }, +}; + +static uint32_t mahimahi_sdslot_switchvdd(struct device *dev, unsigned int vdd) +{ + int i; + int ret; + + if (vdd == sdslot_vdd) + return 0; + + sdslot_vdd = vdd; + + if (vdd == 0) { + vreg_disable(sdslot_vreg); + sdslot_vreg_enabled = 0; + return 0; + } + + if (!sdslot_vreg_enabled) { + ret = vreg_enable(sdslot_vreg); + if (ret) + pr_err("Error enabling vreg (%d)\n", ret); + sdslot_vreg_enabled = 1; + } + + for (i = 0; i < ARRAY_SIZE(mmc_vdd_table); i++) { + if (mmc_vdd_table[i].mask != (1 << vdd)) + continue; + ret = vreg_set_level(sdslot_vreg, mmc_vdd_table[i].level); + if (ret) + pr_err("Error setting level (%d)\n", ret); + return 0; + } + + pr_err("Invalid VDD (%d) specified\n", vdd); + return 0; +} + +static uint32_t +mahimahi_cdma_sdslot_switchvdd(struct device *dev, unsigned int vdd) +{ + if (!vdd == !sdslot_vdd) + return 0; + + /* In CDMA version, the vdd of sdslot is not configurable, and it is + * fixed in 2.85V by hardware design. + */ + + sdslot_vdd = vdd ? MMC_VDD_28_29 : 0; + + if (vdd) + gpio_set_value(MAHIMAHI_CDMA_SD_2V85_EN, 1); + else + gpio_set_value(MAHIMAHI_CDMA_SD_2V85_EN, 0); + + sdslot_vreg_enabled = !!vdd; + + return 0; +} + +static unsigned int mahimahi_sdslot_status_rev0(struct device *dev) +{ + return !gpio_get_value(MAHIMAHI_GPIO_SDMC_CD_REV0_N); +} + +#define MAHIMAHI_MMC_VDD (MMC_VDD_165_195 | MMC_VDD_20_21 | \ + MMC_VDD_21_22 | MMC_VDD_22_23 | \ + MMC_VDD_23_24 | MMC_VDD_24_25 | \ + MMC_VDD_25_26 | MMC_VDD_26_27 | \ + MMC_VDD_27_28 | MMC_VDD_28_29 | \ + MMC_VDD_29_30) + +static struct msm_mmc_gpio_data sdc1_gpio = + .gpio = sdc1_gpio_cfg, + .size = ARRAY_SIZE(sdc1_gpio_cfg), +}; + +static struct msm_mmc_platform_data mahimahi_sdslot_data = { + .ocr_mask = MAHIMAHI_MMC_VDD, + .translate_vdd = mahimahi_sdslot_switchvdd, + .gpio_data = &sdc1_gpio, +}; + +int msm_add_sdcc(unsigned int controller, struct msm_mmc_platform_data *plat, + unsigned int stat_irq, unsigned long stat_irq_flags); + +int __init mahimahi_init_mmc(unsigned int sys_rev, unsigned debug_uart) +{ + uint32_t id; + + if (debug_uart) { + pr_info("%s: sdcard disabled due to debug uart\n", __func__); + goto done; + } + if (opt_disable_sdcard) { + pr_info("%s: sdcard disabled on cmdline\n", __func__); + goto done; + } + + sdslot_vreg_enabled = 0; + + if (is_cdma_version(sys_rev)) { + /* In the CDMA version, sdslot is supplied by a gpio. */ + int rc = gpio_request(MAHIMAHI_CDMA_SD_2V85_EN, "sdslot_en"); + if (rc < 0) { + pr_err("%s: gpio_request(%d) failed: %d\n", __func__, + MAHIMAHI_CDMA_SD_2V85_EN, rc); + return rc; + } + mahimahi_sdslot_data.translate_vdd = mahimahi_cdma_sdslot_switchvdd; + } else { + /* in UMTS version, sdslot is supplied by pmic */ + sdslot_vreg = vreg_get(0, "gp6"); + if (IS_ERR(sdslot_vreg)) + return PTR_ERR(sdslot_vreg); + } + + if (system_rev > 0) + msm_add_sdcc(2, &mahimahi_sdslot_data, 0, 0); + else { + mahimahi_sdslot_data.status = mahimahi_sdslot_status_rev0; + mahimahi_sdslot_data.register_status_notify = NULL; + set_irq_wake(MSM_GPIO_TO_INT(MAHIMAHI_GPIO_SDMC_CD_REV0_N), 1); + msm_add_sdcc(2, &mahimahi_sdslot_data, + MSM_GPIO_TO_INT(MAHIMAHI_GPIO_SDMC_CD_REV0_N), + IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE); + } + +done: + return 0; +} -- 1.7.0.4 -- Sent by a consultant of the Qualcomm Innovation Center, Inc. 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