/* * linux/arch/arm/mach-omap2/hsmmc.c * * Copyright (C) 2007-2008 Texas Instruments * Copyright (C) 2008 Nokia Corporation * Author: Texas Instruments * * 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 #include #include #include #include #include #include #include #include "soc.h" #include "omap_device.h" #include "omap-pm.h" #include "hsmmc.h" #include "control.h" #if IS_ENABLED(CONFIG_MMC_OMAP_HS) static u16 control_pbias_offset; static u16 control_devconf1_offset; #define HSMMC_NAME_LEN 9 static void omap_hsmmc1_before_set_reg(struct device *dev, int power_on, int vdd) { u32 reg, prog_io; struct omap_hsmmc_platform_data *mmc = dev->platform_data; if (mmc->remux) mmc->remux(dev, power_on); /* * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the * card with Vcc regulator (from twl4030 or whatever). OMAP has both * 1.8V and 3.0V modes, controlled by the PBIAS register. * * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which * is most naturally TWL VSIM; those pins also use PBIAS. * * FIXME handle VMMC1A as needed ... */ if (power_on) { if (cpu_is_omap2430()) { reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1); if ((1 << vdd) >= MMC_VDD_30_31) reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE; else reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE; omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1); } if (mmc->internal_clock) { reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); reg |= OMAP2_MMCSDIO1ADPCLKISEL; omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0); } reg = omap_ctrl_readl(control_pbias_offset); if (cpu_is_omap3630()) { /* Set MMC I/O to 52MHz */ prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1); prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL; omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1); } else { reg |= OMAP2_PBIASSPEEDCTRL0; } reg &= ~OMAP2_PBIASLITEPWRDNZ0; omap_ctrl_writel(reg, control_pbias_offset); } else { reg = omap_ctrl_readl(control_pbias_offset); reg &= ~OMAP2_PBIASLITEPWRDNZ0; omap_ctrl_writel(reg, control_pbias_offset); } } static void omap_hsmmc1_after_set_reg(struct device *dev, int power_on, int vdd) { u32 reg; /* 100ms delay required for PBIAS configuration */ msleep(100); if (power_on) { reg = omap_ctrl_readl(control_pbias_offset); reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0); if ((1 << vdd) <= MMC_VDD_165_195) reg &= ~OMAP2_PBIASLITEVMODE0; else reg |= OMAP2_PBIASLITEVMODE0; omap_ctrl_writel(reg, control_pbias_offset); } else { reg = omap_ctrl_readl(control_pbias_offset); reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASLITEVMODE0); omap_ctrl_writel(reg, control_pbias_offset); } } static void hsmmc2_select_input_clk_src(struct omap_hsmmc_platform_data *mmc) { u32 reg; reg = omap_ctrl_readl(control_devconf1_offset); if (mmc->internal_clock) reg |= OMAP2_MMCSDIO2ADPCLKISEL; else reg &= ~OMAP2_MMCSDIO2ADPCLKISEL; omap_ctrl_writel(reg, control_devconf1_offset); } static void hsmmc2_before_set_reg(struct device *dev, int power_on, int vdd) { struct omap_hsmmc_platform_data *mmc = dev->platform_data; if (mmc->remux) mmc->remux(dev, power_on); if (power_on) hsmmc2_select_input_clk_src(mmc); } static int am35x_hsmmc2_set_power(struct device *dev, int power_on, int vdd) { struct omap_hsmmc_platform_data *mmc = dev->platform_data; if (power_on) hsmmc2_select_input_clk_src(mmc); return 0; } static int nop_mmc_set_power(struct device *dev, int power_on, int vdd) { return 0; } static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c, struct omap_hsmmc_platform_data *mmc) { char *hc_name; hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL); if (!hc_name) { pr_err("Cannot allocate memory for controller slot name\n"); kfree(hc_name); return -ENOMEM; } if (c->name) strncpy(hc_name, c->name, HSMMC_NAME_LEN); else snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i", c->mmc, 1); mmc->name = hc_name; mmc->caps = c->caps; mmc->internal_clock = !c->ext_clock; mmc->reg_offset = 0; if (c->cover_only) { /* detect if mobile phone cover removed */ mmc->gpio_cd = -EINVAL; mmc->gpio_cod = c->gpio_cd; } else { /* card detect pin on the mmc socket itself */ mmc->gpio_cd = c->gpio_cd; mmc->gpio_cod = -EINVAL; } mmc->gpio_wp = c->gpio_wp; mmc->remux = c->remux; mmc->init_card = c->init_card; if (c->nonremovable) mmc->nonremovable = 1; /* * NOTE: MMC slots should have a Vcc regulator set up. * This may be from a TWL4030-family chip, another * controllable regulator, or a fixed supply. * * temporary HACK: ocr_mask instead of fixed supply */ if (soc_is_am35xx()) mmc->ocr_mask = MMC_VDD_165_195 | MMC_VDD_26_27 | MMC_VDD_27_28 | MMC_VDD_29_30 | MMC_VDD_30_31 | MMC_VDD_31_32; else mmc->ocr_mask = c->ocr_mask; if (!soc_is_am35xx()) mmc->features |= HSMMC_HAS_PBIAS; switch (c->mmc) { case 1: if (mmc->features & HSMMC_HAS_PBIAS) { /* on-chip level shifting via PBIAS0/PBIAS1 */ mmc->before_set_reg = omap_hsmmc1_before_set_reg; mmc->after_set_reg = omap_hsmmc1_after_set_reg; } if (soc_is_am35xx()) mmc->set_power = nop_mmc_set_power; /* OMAP3630 HSMMC1 supports only 4-bit */ if (cpu_is_omap3630() && (c->caps & MMC_CAP_8_BIT_DATA)) { c->caps &= ~MMC_CAP_8_BIT_DATA; c->caps |= MMC_CAP_4_BIT_DATA; mmc->caps = c->caps; } break; case 2: if (soc_is_am35xx()) mmc->set_power = am35x_hsmmc2_set_power; if (c->ext_clock) c->transceiver = 1; if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) { c->caps &= ~MMC_CAP_8_BIT_DATA; c->caps |= MMC_CAP_4_BIT_DATA; } if (mmc->features & HSMMC_HAS_PBIAS) { /* off-chip level shifting, or none */ mmc->before_set_reg = hsmmc2_before_set_reg; mmc->after_set_reg = NULL; } break; case 3: case 4: case 5: mmc->before_set_reg = NULL; mmc->after_set_reg = NULL; break; default: pr_err("MMC%d configuration not supported!\n", c->mmc); kfree(hc_name); return -ENODEV; } return 0; } static int omap_hsmmc_done; void omap_hsmmc_late_init(struct omap2_hsmmc_info *c) { struct platform_device *pdev; struct omap_hsmmc_platform_data *mmc_pdata; int res; if (omap_hsmmc_done != 1) return; omap_hsmmc_done++; for (; c->mmc; c++) { if (!c->deferred) continue; pdev = c->pdev; if (!pdev) continue; mmc_pdata = pdev->dev.platform_data; if (!mmc_pdata) continue; if (c->cover_only) { /* detect if mobile phone cover removed */ mmc_pdata->gpio_cd = -EINVAL; mmc_pdata->gpio_cod = c->gpio_cd; } else { /* card detect pin on the mmc socket itself */ mmc_pdata->gpio_cd = c->gpio_cd; mmc_pdata->gpio_cod = -EINVAL; } mmc_pdata->gpio_wp = c->gpio_wp; res = omap_device_register(pdev); if (res) pr_err("Could not late init MMC %s\n", c->name); } } #define MAX_OMAP_MMC_HWMOD_NAME_LEN 16 static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo, int ctrl_nr) { struct omap_hwmod *oh; struct omap_hwmod *ohs[1]; struct omap_device *od; struct platform_device *pdev; char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN]; struct omap_hsmmc_platform_data *mmc_data; struct omap_hsmmc_dev_attr *mmc_dev_attr; char *name; int res; mmc_data = kzalloc(sizeof(*mmc_data), GFP_KERNEL); if (!mmc_data) { pr_err("Cannot allocate memory for mmc device!\n"); return; } res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data); if (res < 0) goto free_mmc; name = "omap_hsmmc"; res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN, "mmc%d", ctrl_nr); WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN, "String buffer overflow in MMC%d device setup\n", ctrl_nr); oh = omap_hwmod_lookup(oh_name); if (!oh) { pr_err("Could not look up %s\n", oh_name); goto free_name; } ohs[0] = oh; if (oh->dev_attr != NULL) { mmc_dev_attr = oh->dev_attr; mmc_data->controller_flags = mmc_dev_attr->flags; /* * erratum 2.1.1.128 doesn't apply if board has * a transceiver is attached */ if (hsmmcinfo->transceiver) mmc_data->controller_flags &= ~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ; } pdev = platform_device_alloc(name, ctrl_nr - 1); if (!pdev) { pr_err("Could not allocate pdev for %s\n", name); goto free_name; } dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); od = omap_device_alloc(pdev, ohs, 1); if (IS_ERR(od)) { pr_err("Could not allocate od for %s\n", name); goto put_pdev; } res = platform_device_add_data(pdev, mmc_data, sizeof(struct omap_hsmmc_platform_data)); if (res) { pr_err("Could not add pdata for %s\n", name); goto put_pdev; } hsmmcinfo->pdev = pdev; if (hsmmcinfo->deferred) goto free_mmc; res = omap_device_register(pdev); if (res) { pr_err("Could not register od for %s\n", name); goto free_od; } goto free_mmc; free_od: omap_device_delete(od); put_pdev: platform_device_put(pdev); free_name: kfree(mmc_data->name); free_mmc: kfree(mmc_data); } void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers) { if (omap_hsmmc_done) return; omap_hsmmc_done = 1; if (cpu_is_omap2430()) { control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE; control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1; } else { control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE; control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1; } for (; controllers->mmc; controllers++) omap_hsmmc_init_one(controllers, controllers->mmc); } #endif