diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc-imx.c')
-rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 261 |
1 files changed, 205 insertions, 56 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 710b706f4fcf..9ebfb4b482f5 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -20,7 +20,9 @@ #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> -#include <mach/hardware.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> #include <mach/esdhc.h> #include "sdhci-pltfm.h" #include "sdhci-esdhc.h" @@ -29,7 +31,6 @@ #define SDHCI_VENDOR_SPEC 0xC0 #define SDHCI_VENDOR_SPEC_SDIO_QUIRK 0x00000002 -#define ESDHC_FLAG_GPIO_FOR_CD (1 << 0) /* * The CMDTYPE of the CMD register (offset 0xE) should be set to * "11" when the STOP CMD12 is issued on imx53 to abort one @@ -43,10 +44,67 @@ */ #define ESDHC_FLAG_MULTIBLK_NO_INT (1 << 1) +enum imx_esdhc_type { + IMX25_ESDHC, + IMX35_ESDHC, + IMX51_ESDHC, + IMX53_ESDHC, +}; + struct pltfm_imx_data { int flags; u32 scratchpad; + enum imx_esdhc_type devtype; + struct esdhc_platform_data boarddata; +}; + +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, + }, { + /* 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], }, + { /* 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 void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg) { @@ -60,17 +118,14 @@ 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; + struct esdhc_platform_data *boarddata = &imx_data->boarddata; - /* fake CARD_PRESENT flag on mx25/35 */ + /* fake CARD_PRESENT flag */ u32 val = readl(host->ioaddr + reg); if (unlikely((reg == SDHCI_PRESENT_STATE) - && (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) { - struct esdhc_platform_data *boarddata = - host->mmc->parent->platform_data; - - if (boarddata && gpio_is_valid(boarddata->cd_gpio) - && gpio_get_value(boarddata->cd_gpio)) + && gpio_is_valid(boarddata->cd_gpio))) { + if (gpio_get_value(boarddata->cd_gpio)) /* no card, if a valid gpio says so... */ val &= ~SDHCI_CARD_PRESENT; else @@ -85,12 +140,12 @@ 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; + struct esdhc_platform_data *boarddata = &imx_data->boarddata; if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE) - && (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) + && (boarddata->cd_type == ESDHC_CD_GPIO))) /* * these interrupts won't work with a custom card_detect gpio - * (only applied to mx25/35) */ val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT); @@ -173,6 +228,17 @@ static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int 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); } static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host) @@ -189,6 +255,26 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *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: + if (gpio_is_valid(boarddata->wp_gpio)) + return gpio_get_value(boarddata->wp_gpio); + case ESDHC_WP_CONTROLLER: + return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) & + SDHCI_WRITE_PROTECT); + case ESDHC_WP_NONE: + break; + } + + return -ENOSYS; +} + static struct sdhci_ops sdhci_esdhc_ops = { .read_l = esdhc_readl_le, .read_w = esdhc_readw_le, @@ -198,6 +284,7 @@ static struct sdhci_ops sdhci_esdhc_ops = { .set_clock = esdhc_set_clock, .get_max_clock = esdhc_pltfm_get_max_clock, .get_min_clock = esdhc_pltfm_get_min_clock, + .get_ro = esdhc_pltfm_get_ro, }; static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = { @@ -207,17 +294,6 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = { .ops = &sdhci_esdhc_ops, }; -static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host) -{ - struct esdhc_platform_data *boarddata = - host->mmc->parent->platform_data; - - if (boarddata && gpio_is_valid(boarddata->wp_gpio)) - return gpio_get_value(boarddata->wp_gpio); - else - return -ENOSYS; -} - static irqreturn_t cd_irq(int irq, void *data) { struct sdhci_host *sdhost = (struct sdhci_host *)data; @@ -226,8 +302,48 @@ static irqreturn_t cd_irq(int irq, void *data) return IRQ_HANDLED; }; +#ifdef CONFIG_OF +static int __devinit +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, "fsl,card-wired", 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; + + 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 __devinit 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; @@ -242,8 +358,14 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev) pltfm_host = sdhci_priv(host); imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL); - if (!imx_data) - return -ENOMEM; + if (!imx_data) { + err = -ENOMEM; + goto err_imx_data; + } + + if (of_id) + pdev->id_entry = of_id->data; + imx_data->devtype = pdev->id_entry->driver_data; pltfm_host->priv = imx_data; clk = clk_get(mmc_dev(host->mmc), NULL); @@ -255,50 +377,72 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev) clk_enable(clk); pltfm_host->clk = clk; - if (!cpu_is_mx25()) + if (!is_imx25_esdhc(imx_data)) host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; - if (cpu_is_mx25() || cpu_is_mx35()) { + 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; - /* write_protect can't be routed to controller, use gpio */ - sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro; - } - if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51())) + if (is_imx53_esdhc(imx_data)) imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT; - boarddata = host->mmc->parent->platform_data; - if (boarddata) { + 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 no_board_data; + } + imx_data->boarddata = *((struct esdhc_platform_data *) + host->mmc->parent->platform_data); + } + + /* write_protect */ + if (boarddata->wp_type == ESDHC_WP_GPIO) { err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP"); if (err) { dev_warn(mmc_dev(host->mmc), - "no write-protect pin available!\n"); - boarddata->wp_gpio = err; + "no write-protect pin available!\n"); + boarddata->wp_gpio = -EINVAL; } + } else { + boarddata->wp_gpio = -EINVAL; + } + + /* card_detect */ + if (boarddata->cd_type != ESDHC_CD_GPIO) + boarddata->cd_gpio = -EINVAL; + switch (boarddata->cd_type) { + case ESDHC_CD_GPIO: err = gpio_request_one(boarddata->cd_gpio, GPIOF_IN, "ESDHC_CD"); if (err) { - dev_warn(mmc_dev(host->mmc), + dev_err(mmc_dev(host->mmc), "no card-detect pin available!\n"); goto no_card_detect_pin; } - /* i.MX5x has issues to be researched */ - if (!cpu_is_mx25() && !cpu_is_mx35()) - goto not_supported; - err = request_irq(gpio_to_irq(boarddata->cd_gpio), cd_irq, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, mmc_hostname(host->mmc), host); if (err) { - dev_warn(mmc_dev(host->mmc), "request irq error\n"); + dev_err(mmc_dev(host->mmc), "request irq error\n"); goto no_card_detect_irq; } + /* fall through */ - imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD; - /* Now we have a working card_detect again */ + 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; } err = sdhci_add_host(host); @@ -307,16 +451,21 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev) return 0; - no_card_detect_irq: - gpio_free(boarddata->cd_gpio); - no_card_detect_pin: - boarddata->cd_gpio = err; - not_supported: - kfree(imx_data); - err_add_host: +err_add_host: + if (gpio_is_valid(boarddata->cd_gpio)) + free_irq(gpio_to_irq(boarddata->cd_gpio), host); +no_card_detect_irq: + if (gpio_is_valid(boarddata->cd_gpio)) + gpio_free(boarddata->cd_gpio); + if (gpio_is_valid(boarddata->wp_gpio)) + gpio_free(boarddata->wp_gpio); +no_card_detect_pin: +no_board_data: clk_disable(pltfm_host->clk); clk_put(pltfm_host->clk); - err_clk_get: +err_clk_get: + kfree(imx_data); +err_imx_data: sdhci_pltfm_free(pdev); return err; } @@ -325,20 +474,18 @@ static int __devexit 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 esdhc_platform_data *boarddata = host->mmc->parent->platform_data; struct pltfm_imx_data *imx_data = pltfm_host->priv; + struct esdhc_platform_data *boarddata = &imx_data->boarddata; int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); sdhci_remove_host(host, dead); - if (boarddata && gpio_is_valid(boarddata->wp_gpio)) + if (gpio_is_valid(boarddata->wp_gpio)) gpio_free(boarddata->wp_gpio); - if (boarddata && gpio_is_valid(boarddata->cd_gpio)) { + if (gpio_is_valid(boarddata->cd_gpio)) { + free_irq(gpio_to_irq(boarddata->cd_gpio), host); gpio_free(boarddata->cd_gpio); - - if (!(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)) - free_irq(gpio_to_irq(boarddata->cd_gpio), host); } clk_disable(pltfm_host->clk); @@ -354,7 +501,9 @@ static struct platform_driver sdhci_esdhc_imx_driver = { .driver = { .name = "sdhci-esdhc-imx", .owner = THIS_MODULE, + .of_match_table = imx_esdhc_dt_ids, }, + .id_table = imx_esdhc_devtype, .probe = sdhci_esdhc_imx_probe, .remove = __devexit_p(sdhci_esdhc_imx_remove), #ifdef CONFIG_PM |