| /* |
| * Freescale eSDHC i.MX controller driver for the platform bus. |
| * |
| * derived from the OF-version. |
| * |
| * Copyright (c) 2010 Pengutronix e.K. |
| * Author: Wolfram Sang <w.sang@pengutronix.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License. |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/clk.h> |
| #include <linux/gpio.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/mmc/host.h> |
| #include <linux/mmc/mmc.h> |
| #include <linux/mmc/sdio.h> |
| #include <linux/mmc/slot-gpio.h> |
| #include <linux/of.h> |
| #include <linux/of_device.h> |
| #include <linux/of_gpio.h> |
| #include <linux/pinctrl/consumer.h> |
| #include <linux/platform_data/mmc-esdhc-imx.h> |
| #include "sdhci-pltfm.h" |
| #include "sdhci-esdhc.h" |
| |
| #define ESDHC_CTRL_D3CD 0x08 |
| /* VENDOR SPEC register */ |
| #define ESDHC_VENDOR_SPEC 0xc0 |
| #define ESDHC_VENDOR_SPEC_SDIO_QUIRK (1 << 1) |
| #define ESDHC_WTMK_LVL 0x44 |
| #define ESDHC_MIX_CTRL 0x48 |
| #define ESDHC_MIX_CTRL_AC23EN (1 << 7) |
| /* Bits 3 and 6 are not SDHCI standard definitions */ |
| #define ESDHC_MIX_CTRL_SDHCI_MASK 0xb7 |
| |
| /* |
| * Our interpretation of the SDHCI_HOST_CONTROL register |
| */ |
| #define ESDHC_CTRL_4BITBUS (0x1 << 1) |
| #define ESDHC_CTRL_8BITBUS (0x2 << 1) |
| #define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1) |
| |
| /* |
| * There is an INT DMA ERR mis-match between eSDHC and STD SDHC SPEC: |
| * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design, |
| * but bit28 is used as the INT DMA ERR in fsl eSDHC design. |
| * Define this macro DMA error INT for fsl eSDHC |
| */ |
| #define ESDHC_INT_VENDOR_SPEC_DMA_ERR (1 << 28) |
| |
| /* |
| * The CMDTYPE of the CMD register (offset 0xE) should be set to |
| * "11" when the STOP CMD12 is issued on imx53 to abort one |
| * open ended multi-blk IO. Otherwise the TC INT wouldn't |
| * be generated. |
| * In exact block transfer, the controller doesn't complete the |
| * operations automatically as required at the end of the |
| * transfer and remains on hold if the abort command is not sent. |
| * As a result, the TC flag is not asserted and SW received timeout |
| * exeception. Bit1 of Vendor Spec registor is used to fix it. |
| */ |
| #define ESDHC_FLAG_MULTIBLK_NO_INT (1 << 1) |
| |
| enum imx_esdhc_type { |
| IMX25_ESDHC, |
| IMX35_ESDHC, |
| IMX51_ESDHC, |
| IMX53_ESDHC, |
| IMX6Q_USDHC, |
| }; |
| |
| struct pltfm_imx_data { |
| int flags; |
| u32 scratchpad; |
| enum imx_esdhc_type devtype; |
| struct pinctrl *pinctrl; |
| struct esdhc_platform_data boarddata; |
| struct clk *clk_ipg; |
| struct clk *clk_ahb; |
| struct clk *clk_per; |
| enum { |
| NO_CMD_PENDING, /* no multiblock command pending*/ |
| MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */ |
| WAIT_FOR_INT, /* sent CMD12, waiting for response INT */ |
| } multiblock_status; |
| |
| }; |
| |
| static struct platform_device_id imx_esdhc_devtype[] = { |
| { |
| .name = "sdhci-esdhc-imx25", |
| .driver_data = IMX25_ESDHC, |
| }, { |
| .name = "sdhci-esdhc-imx35", |
| .driver_data = IMX35_ESDHC, |
| }, { |
| .name = "sdhci-esdhc-imx51", |
| .driver_data = IMX51_ESDHC, |
| }, { |
| .name = "sdhci-esdhc-imx53", |
| .driver_data = IMX53_ESDHC, |
| }, { |
| .name = "sdhci-usdhc-imx6q", |
| .driver_data = IMX6Q_USDHC, |
| }, { |
| /* sentinel */ |
| } |
| }; |
| MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype); |
| |
| static const struct of_device_id imx_esdhc_dt_ids[] = { |
| { .compatible = "fsl,imx25-esdhc", .data = &imx_esdhc_devtype[IMX25_ESDHC], }, |
| { .compatible = "fsl,imx35-esdhc", .data = &imx_esdhc_devtype[IMX35_ESDHC], }, |
| { .compatible = "fsl,imx51-esdhc", .data = &imx_esdhc_devtype[IMX51_ESDHC], }, |
| { .compatible = "fsl,imx53-esdhc", .data = &imx_esdhc_devtype[IMX53_ESDHC], }, |
| { .compatible = "fsl,imx6q-usdhc", .data = &imx_esdhc_devtype[IMX6Q_USDHC], }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids); |
| |
| static inline int is_imx25_esdhc(struct pltfm_imx_data *data) |
| { |
| return data->devtype == IMX25_ESDHC; |
| } |
| |
| static inline int is_imx35_esdhc(struct pltfm_imx_data *data) |
| { |
| return data->devtype == IMX35_ESDHC; |
| } |
| |
| static inline int is_imx51_esdhc(struct pltfm_imx_data *data) |
| { |
| return data->devtype == IMX51_ESDHC; |
| } |
| |
| static inline int is_imx53_esdhc(struct pltfm_imx_data *data) |
| { |
| return data->devtype == IMX53_ESDHC; |
| } |
| |
| static inline int is_imx6q_usdhc(struct pltfm_imx_data *data) |
| { |
| return data->devtype == IMX6Q_USDHC; |
| } |
| |
| static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg) |
| { |
| void __iomem *base = host->ioaddr + (reg & ~0x3); |
| u32 shift = (reg & 0x3) * 8; |
| |
| writel(((readl(base) & ~(mask << shift)) | (val << shift)), base); |
| } |
| |
| static u32 esdhc_readl_le(struct sdhci_host *host, int reg) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| u32 val = readl(host->ioaddr + reg); |
| |
| if (unlikely(reg == SDHCI_CAPABILITIES)) { |
| /* In FSL esdhc IC module, only bit20 is used to indicate the |
| * ADMA2 capability of esdhc, but this bit is messed up on |
| * some SOCs (e.g. on MX25, MX35 this bit is set, but they |
| * don't actually support ADMA2). So set the BROKEN_ADMA |
| * uirk on MX25/35 platforms. |
| */ |
| |
| if (val & SDHCI_CAN_DO_ADMA1) { |
| val &= ~SDHCI_CAN_DO_ADMA1; |
| val |= SDHCI_CAN_DO_ADMA2; |
| } |
| } |
| |
| if (unlikely(reg == SDHCI_INT_STATUS)) { |
| if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) { |
| val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR; |
| val |= SDHCI_INT_ADMA_ERROR; |
| } |
| |
| /* |
| * mask off the interrupt we get in response to the manually |
| * sent CMD12 |
| */ |
| if ((imx_data->multiblock_status == WAIT_FOR_INT) && |
| ((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) { |
| val &= ~SDHCI_INT_RESPONSE; |
| writel(SDHCI_INT_RESPONSE, host->ioaddr + |
| SDHCI_INT_STATUS); |
| imx_data->multiblock_status = NO_CMD_PENDING; |
| } |
| } |
| |
| return val; |
| } |
| |
| static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| u32 data; |
| |
| if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)) { |
| if (val & SDHCI_INT_CARD_INT) { |
| /* |
| * Clear and then set D3CD bit to avoid missing the |
| * card interrupt. This is a eSDHC controller problem |
| * so we need to apply the following workaround: clear |
| * and set D3CD bit will make eSDHC re-sample the card |
| * interrupt. In case a card interrupt was lost, |
| * re-sample it by the following steps. |
| */ |
| data = readl(host->ioaddr + SDHCI_HOST_CONTROL); |
| data &= ~ESDHC_CTRL_D3CD; |
| writel(data, host->ioaddr + SDHCI_HOST_CONTROL); |
| data |= ESDHC_CTRL_D3CD; |
| writel(data, host->ioaddr + SDHCI_HOST_CONTROL); |
| } |
| } |
| |
| if (unlikely((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT) |
| && (reg == SDHCI_INT_STATUS) |
| && (val & SDHCI_INT_DATA_END))) { |
| u32 v; |
| v = readl(host->ioaddr + ESDHC_VENDOR_SPEC); |
| v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK; |
| writel(v, host->ioaddr + ESDHC_VENDOR_SPEC); |
| |
| if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS) |
| { |
| /* send a manual CMD12 with RESPTYP=none */ |
| data = MMC_STOP_TRANSMISSION << 24 | |
| SDHCI_CMD_ABORTCMD << 16; |
| writel(data, host->ioaddr + SDHCI_TRANSFER_MODE); |
| imx_data->multiblock_status = WAIT_FOR_INT; |
| } |
| } |
| |
| if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)) { |
| if (val & SDHCI_INT_ADMA_ERROR) { |
| val &= ~SDHCI_INT_ADMA_ERROR; |
| val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR; |
| } |
| } |
| |
| writel(val, host->ioaddr + reg); |
| } |
| |
| static u16 esdhc_readw_le(struct sdhci_host *host, int reg) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| |
| if (unlikely(reg == SDHCI_HOST_VERSION)) { |
| reg ^= 2; |
| if (is_imx6q_usdhc(imx_data)) { |
| /* |
| * The usdhc register returns a wrong host version. |
| * Correct it here. |
| */ |
| return SDHCI_SPEC_300; |
| } |
| } |
| |
| return readw(host->ioaddr + reg); |
| } |
| |
| static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| |
| switch (reg) { |
| case SDHCI_TRANSFER_MODE: |
| if ((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT) |
| && (host->cmd->opcode == SD_IO_RW_EXTENDED) |
| && (host->cmd->data->blocks > 1) |
| && (host->cmd->data->flags & MMC_DATA_READ)) { |
| u32 v; |
| v = readl(host->ioaddr + ESDHC_VENDOR_SPEC); |
| v |= ESDHC_VENDOR_SPEC_SDIO_QUIRK; |
| writel(v, host->ioaddr + ESDHC_VENDOR_SPEC); |
| } |
| |
| if (is_imx6q_usdhc(imx_data)) { |
| u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL); |
| /* Swap AC23 bit */ |
| if (val & SDHCI_TRNS_AUTO_CMD23) { |
| val &= ~SDHCI_TRNS_AUTO_CMD23; |
| val |= ESDHC_MIX_CTRL_AC23EN; |
| } |
| m = val | (m & ~ESDHC_MIX_CTRL_SDHCI_MASK); |
| writel(m, host->ioaddr + ESDHC_MIX_CTRL); |
| } else { |
| /* |
| * Postpone this write, we must do it together with a |
| * command write that is down below. |
| */ |
| imx_data->scratchpad = val; |
| } |
| return; |
| case SDHCI_COMMAND: |
| if (host->cmd->opcode == MMC_STOP_TRANSMISSION) |
| val |= SDHCI_CMD_ABORTCMD; |
| |
| if ((host->cmd->opcode == MMC_SET_BLOCK_COUNT) && |
| (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)) |
| imx_data->multiblock_status = MULTIBLK_IN_PROCESS; |
| |
| if (is_imx6q_usdhc(imx_data)) |
| writel(val << 16, |
| host->ioaddr + SDHCI_TRANSFER_MODE); |
| else |
| writel(val << 16 | imx_data->scratchpad, |
| host->ioaddr + SDHCI_TRANSFER_MODE); |
| return; |
| case SDHCI_BLOCK_SIZE: |
| val &= ~SDHCI_MAKE_BLKSZ(0x7, 0); |
| break; |
| } |
| esdhc_clrset_le(host, 0xffff, val, reg); |
| } |
| |
| static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| u32 new_val; |
| u32 mask; |
| |
| switch (reg) { |
| case SDHCI_POWER_CONTROL: |
| /* |
| * FSL put some DMA bits here |
| * If your board has a regulator, code should be here |
| */ |
| return; |
| case SDHCI_HOST_CONTROL: |
| /* FSL messed up here, so we need to manually compose it. */ |
| new_val = val & SDHCI_CTRL_LED; |
| /* ensure the endianness */ |
| new_val |= ESDHC_HOST_CONTROL_LE; |
| /* bits 8&9 are reserved on mx25 */ |
| if (!is_imx25_esdhc(imx_data)) { |
| /* DMA mode bits are shifted */ |
| new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5; |
| } |
| |
| /* |
| * Do not touch buswidth bits here. This is done in |
| * esdhc_pltfm_bus_width. |
| * Do not touch the D3CD bit either which is used for the |
| * SDIO interrupt errata workaround. |
| */ |
| mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD); |
| |
| esdhc_clrset_le(host, mask, new_val, reg); |
| return; |
| } |
| esdhc_clrset_le(host, 0xff, val, reg); |
| |
| /* |
| * The esdhc has a design violation to SDHC spec which tells |
| * that software reset should not affect card detection circuit. |
| * But esdhc clears its SYSCTL register bits [0..2] during the |
| * software reset. This will stop those clocks that card detection |
| * circuit relies on. To work around it, we turn the clocks on back |
| * to keep card detection circuit functional. |
| */ |
| if ((reg == SDHCI_SOFTWARE_RESET) && (val & 1)) { |
| esdhc_clrset_le(host, 0x7, 0x7, ESDHC_SYSTEM_CONTROL); |
| /* |
| * The reset on usdhc fails to clear MIX_CTRL register. |
| * Do it manually here. |
| */ |
| if (is_imx6q_usdhc(imx_data)) |
| writel(0, host->ioaddr + ESDHC_MIX_CTRL); |
| } |
| } |
| |
| static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| |
| return clk_get_rate(pltfm_host->clk) / 256 / 16; |
| } |
| |
| static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| struct esdhc_platform_data *boarddata = &imx_data->boarddata; |
| |
| switch (boarddata->wp_type) { |
| case ESDHC_WP_GPIO: |
| return mmc_gpio_get_ro(host->mmc); |
| case ESDHC_WP_CONTROLLER: |
| return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) & |
| SDHCI_WRITE_PROTECT); |
| case ESDHC_WP_NONE: |
| break; |
| } |
| |
| return -ENOSYS; |
| } |
| |
| static int esdhc_pltfm_bus_width(struct sdhci_host *host, int width) |
| { |
| u32 ctrl; |
| |
| switch (width) { |
| case MMC_BUS_WIDTH_8: |
| ctrl = ESDHC_CTRL_8BITBUS; |
| break; |
| case MMC_BUS_WIDTH_4: |
| ctrl = ESDHC_CTRL_4BITBUS; |
| break; |
| default: |
| ctrl = 0; |
| break; |
| } |
| |
| esdhc_clrset_le(host, ESDHC_CTRL_BUSWIDTH_MASK, ctrl, |
| SDHCI_HOST_CONTROL); |
| |
| return 0; |
| } |
| |
| static const struct sdhci_ops sdhci_esdhc_ops = { |
| .read_l = esdhc_readl_le, |
| .read_w = esdhc_readw_le, |
| .write_l = esdhc_writel_le, |
| .write_w = esdhc_writew_le, |
| .write_b = esdhc_writeb_le, |
| .set_clock = esdhc_set_clock, |
| .get_max_clock = sdhci_pltfm_clk_get_max_clock, |
| .get_min_clock = esdhc_pltfm_get_min_clock, |
| .get_ro = esdhc_pltfm_get_ro, |
| .platform_bus_width = esdhc_pltfm_bus_width, |
| }; |
| |
| static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = { |
| .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT |
| | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
| | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
| | SDHCI_QUIRK_BROKEN_CARD_DETECTION, |
| .ops = &sdhci_esdhc_ops, |
| }; |
| |
| #ifdef CONFIG_OF |
| static int |
| sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, |
| struct esdhc_platform_data *boarddata) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| |
| if (!np) |
| return -ENODEV; |
| |
| if (of_get_property(np, "non-removable", NULL)) |
| boarddata->cd_type = ESDHC_CD_PERMANENT; |
| |
| if (of_get_property(np, "fsl,cd-controller", NULL)) |
| boarddata->cd_type = ESDHC_CD_CONTROLLER; |
| |
| if (of_get_property(np, "fsl,wp-controller", NULL)) |
| boarddata->wp_type = ESDHC_WP_CONTROLLER; |
| |
| boarddata->cd_gpio = of_get_named_gpio(np, "cd-gpios", 0); |
| if (gpio_is_valid(boarddata->cd_gpio)) |
| boarddata->cd_type = ESDHC_CD_GPIO; |
| |
| boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0); |
| if (gpio_is_valid(boarddata->wp_gpio)) |
| boarddata->wp_type = ESDHC_WP_GPIO; |
| |
| of_property_read_u32(np, "bus-width", &boarddata->max_bus_width); |
| |
| return 0; |
| } |
| #else |
| static inline int |
| sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, |
| struct esdhc_platform_data *boarddata) |
| { |
| return -ENODEV; |
| } |
| #endif |
| |
| static int sdhci_esdhc_imx_probe(struct platform_device *pdev) |
| { |
| const struct of_device_id *of_id = |
| of_match_device(imx_esdhc_dt_ids, &pdev->dev); |
| struct sdhci_pltfm_host *pltfm_host; |
| struct sdhci_host *host; |
| struct esdhc_platform_data *boarddata; |
| int err; |
| struct pltfm_imx_data *imx_data; |
| |
| host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata, 0); |
| if (IS_ERR(host)) |
| return PTR_ERR(host); |
| |
| pltfm_host = sdhci_priv(host); |
| |
| imx_data = devm_kzalloc(&pdev->dev, sizeof(*imx_data), GFP_KERNEL); |
| if (!imx_data) { |
| err = -ENOMEM; |
| goto free_sdhci; |
| } |
| |
| if (of_id) |
| pdev->id_entry = of_id->data; |
| imx_data->devtype = pdev->id_entry->driver_data; |
| pltfm_host->priv = imx_data; |
| |
| imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
| if (IS_ERR(imx_data->clk_ipg)) { |
| err = PTR_ERR(imx_data->clk_ipg); |
| goto free_sdhci; |
| } |
| |
| imx_data->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); |
| if (IS_ERR(imx_data->clk_ahb)) { |
| err = PTR_ERR(imx_data->clk_ahb); |
| goto free_sdhci; |
| } |
| |
| imx_data->clk_per = devm_clk_get(&pdev->dev, "per"); |
| if (IS_ERR(imx_data->clk_per)) { |
| err = PTR_ERR(imx_data->clk_per); |
| goto free_sdhci; |
| } |
| |
| pltfm_host->clk = imx_data->clk_per; |
| |
| clk_prepare_enable(imx_data->clk_per); |
| clk_prepare_enable(imx_data->clk_ipg); |
| clk_prepare_enable(imx_data->clk_ahb); |
| |
| imx_data->pinctrl = devm_pinctrl_get_select_default(&pdev->dev); |
| if (IS_ERR(imx_data->pinctrl)) { |
| err = PTR_ERR(imx_data->pinctrl); |
| goto disable_clk; |
| } |
| |
| host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; |
| |
| if (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data)) |
| /* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */ |
| host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK |
| | SDHCI_QUIRK_BROKEN_ADMA; |
| |
| if (is_imx53_esdhc(imx_data)) |
| imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT; |
| |
| /* |
| * The imx6q ROM code will change the default watermark level setting |
| * to something insane. Change it back here. |
| */ |
| if (is_imx6q_usdhc(imx_data)) |
| writel(0x08100810, host->ioaddr + ESDHC_WTMK_LVL); |
| |
| boarddata = &imx_data->boarddata; |
| if (sdhci_esdhc_imx_probe_dt(pdev, boarddata) < 0) { |
| if (!host->mmc->parent->platform_data) { |
| dev_err(mmc_dev(host->mmc), "no board data!\n"); |
| err = -EINVAL; |
| goto disable_clk; |
| } |
| imx_data->boarddata = *((struct esdhc_platform_data *) |
| host->mmc->parent->platform_data); |
| } |
| |
| /* write_protect */ |
| if (boarddata->wp_type == ESDHC_WP_GPIO) { |
| err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio); |
| if (err) { |
| dev_err(mmc_dev(host->mmc), |
| "failed to request write-protect gpio!\n"); |
| goto disable_clk; |
| } |
| host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; |
| } |
| |
| /* card_detect */ |
| switch (boarddata->cd_type) { |
| case ESDHC_CD_GPIO: |
| err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio); |
| if (err) { |
| dev_err(mmc_dev(host->mmc), |
| "failed to request card-detect gpio!\n"); |
| goto disable_clk; |
| } |
| /* fall through */ |
| |
| case ESDHC_CD_CONTROLLER: |
| /* we have a working card_detect back */ |
| host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
| break; |
| |
| case ESDHC_CD_PERMANENT: |
| host->mmc->caps = MMC_CAP_NONREMOVABLE; |
| break; |
| |
| case ESDHC_CD_NONE: |
| break; |
| } |
| |
| switch (boarddata->max_bus_width) { |
| case 8: |
| host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA; |
| break; |
| case 4: |
| host->mmc->caps |= MMC_CAP_4_BIT_DATA; |
| break; |
| case 1: |
| default: |
| host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; |
| break; |
| } |
| |
| err = sdhci_add_host(host); |
| if (err) |
| goto disable_clk; |
| |
| return 0; |
| |
| disable_clk: |
| clk_disable_unprepare(imx_data->clk_per); |
| clk_disable_unprepare(imx_data->clk_ipg); |
| clk_disable_unprepare(imx_data->clk_ahb); |
| free_sdhci: |
| sdhci_pltfm_free(pdev); |
| return err; |
| } |
| |
| static int sdhci_esdhc_imx_remove(struct platform_device *pdev) |
| { |
| struct sdhci_host *host = platform_get_drvdata(pdev); |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| struct pltfm_imx_data *imx_data = pltfm_host->priv; |
| int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); |
| |
| sdhci_remove_host(host, dead); |
| |
| clk_disable_unprepare(imx_data->clk_per); |
| clk_disable_unprepare(imx_data->clk_ipg); |
| clk_disable_unprepare(imx_data->clk_ahb); |
| |
| sdhci_pltfm_free(pdev); |
| |
| return 0; |
| } |
| |
| static struct platform_driver sdhci_esdhc_imx_driver = { |
| .driver = { |
| .name = "sdhci-esdhc-imx", |
| .owner = THIS_MODULE, |
| .of_match_table = imx_esdhc_dt_ids, |
| .pm = SDHCI_PLTFM_PMOPS, |
| }, |
| .id_table = imx_esdhc_devtype, |
| .probe = sdhci_esdhc_imx_probe, |
| .remove = sdhci_esdhc_imx_remove, |
| }; |
| |
| module_platform_driver(sdhci_esdhc_imx_driver); |
| |
| MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC"); |
| MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); |
| MODULE_LICENSE("GPL v2"); |