/* linux/arch/arm/mach-msm/board-swordfish-mmc.c * * Copyright (C) 2008 Google, Inc. * * 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. * * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "devices.h" #define FPGA_BASE 0x70000000 #define FPGA_SDIO_STATUS 0x280 static void __iomem *fpga_base; #define DEBUG_SWORDFISH_MMC 1 extern int msm_add_sdcc(unsigned int controller, struct mmc_platform_data *plat, unsigned int stat_irq, unsigned long stat_irq_flags); static int config_gpio_table(unsigned *table, int len, int enable) { int n; int rc = 0; for (n = 0; n < len; n++) { unsigned dis = !enable; unsigned id = table[n]; if (msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &id, &dis)) { pr_err("%s: id=0x%08x dis=%d\n", __func__, table[n], dis); rc = -1; } } return rc; } static unsigned sdc1_gpio_table[] = { PCOM_GPIO_CFG(51, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(52, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(53, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(54, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(55, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(56, 1, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), }; static unsigned sdc2_gpio_table[] = { PCOM_GPIO_CFG(62, 1, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), PCOM_GPIO_CFG(63, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(64, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(65, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(66, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(67, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), }; static unsigned sdc3_gpio_table[] = { PCOM_GPIO_CFG(88, 1, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), PCOM_GPIO_CFG(89, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(90, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(91, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(92, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(93, 1, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), }; static unsigned sdc4_gpio_table[] = { PCOM_GPIO_CFG(142, 3, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), PCOM_GPIO_CFG(143, 3, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(144, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(145, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(146, 3, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), PCOM_GPIO_CFG(147, 3, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), }; struct sdc_info { unsigned *table; unsigned len; }; static struct sdc_info sdcc_gpio_tables[] = { [0] = { .table = sdc1_gpio_table, .len = ARRAY_SIZE(sdc1_gpio_table), }, [1] = { .table = sdc2_gpio_table, .len = ARRAY_SIZE(sdc2_gpio_table), }, [2] = { .table = sdc3_gpio_table, .len = ARRAY_SIZE(sdc3_gpio_table), }, [3] = { .table = sdc4_gpio_table, .len = ARRAY_SIZE(sdc4_gpio_table), }, }; static int swordfish_sdcc_setup_gpio(int dev_id, unsigned enable) { struct sdc_info *info; if (dev_id < 1 || dev_id > 4) return -1; info = &sdcc_gpio_tables[dev_id - 1]; return config_gpio_table(info->table, info->len, enable); } struct mmc_vdd_xlat { int mask; int level; }; static struct mmc_vdd_xlat 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 struct vreg *vreg_sdcc; static unsigned int vreg_sdcc_enabled; static unsigned int sdcc_vdd = 0xffffffff; static uint32_t sdcc_translate_vdd(struct device *dev, unsigned int vdd) { int i; int rc = 0; struct platform_device *pdev; pdev = container_of(dev, struct platform_device, dev); BUG_ON(!vreg_sdcc); if (vdd == sdcc_vdd) return 0; sdcc_vdd = vdd; /* enable/disable the signals to the slot */ swordfish_sdcc_setup_gpio(pdev->id, !!vdd); /* power down */ if (vdd == 0) { #if DEBUG_SWORDFISH_MMC pr_info("%s: disable sdcc power\n", __func__); #endif vreg_disable(vreg_sdcc); vreg_sdcc_enabled = 0; return 0; } if (!vreg_sdcc_enabled) { rc = vreg_enable(vreg_sdcc); if (rc) pr_err("%s: Error enabling vreg (%d)\n", __func__, rc); vreg_sdcc_enabled = 1; } for (i = 0; i < ARRAY_SIZE(mmc_vdd_table); i++) { if (mmc_vdd_table[i].mask != (1 << vdd)) continue; #if DEBUG_SWORDFISH_MMC pr_info("%s: Setting level to %u\n", __func__, mmc_vdd_table[i].level); #endif rc = vreg_set_level(vreg_sdcc, mmc_vdd_table[i].level); if (rc) pr_err("%s: Error setting vreg level (%d)\n", __func__, rc); return 0; } pr_err("%s: Invalid VDD %d specified\n", __func__, vdd); return 0; } static unsigned int swordfish_sdcc_slot_status (struct device *dev) { struct platform_device *pdev; uint32_t sdcc_stat; pdev = container_of(dev, struct platform_device, dev); sdcc_stat = readl(fpga_base + FPGA_SDIO_STATUS); /* bit 0 - sdcc1 crd_det * bit 1 - sdcc1 wr_prt * bit 2 - sdcc2 crd_det * bit 3 - sdcc2 wr_prt * etc... */ /* crd_det is active low */ return !(sdcc_stat & (1 << ((pdev->id - 1) << 1))); } #define SWORDFISH_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 mmc_platform_data swordfish_sdcc_data = { .ocr_mask = SWORDFISH_MMC_VDD/*MMC_VDD_27_28 | MMC_VDD_28_29*/, .status = swordfish_sdcc_slot_status, .translate_vdd = sdcc_translate_vdd, }; int __init swordfish_init_mmc(void) { vreg_sdcc_enabled = 0; vreg_sdcc = vreg_get(NULL, "gp5"); if (IS_ERR(vreg_sdcc)) { pr_err("%s: vreg get failed (%ld)\n", __func__, PTR_ERR(vreg_sdcc)); return PTR_ERR(vreg_sdcc); } fpga_base = ioremap(FPGA_BASE, SZ_4K); if (!fpga_base) { pr_err("%s: Can't ioremap FPGA base address (0x%08x)\n", __func__, FPGA_BASE); vreg_put(vreg_sdcc); return -EIO; } msm_add_sdcc(1, &swordfish_sdcc_data, 0, 0); msm_add_sdcc(4, &swordfish_sdcc_data, 0, 0); return 0; }