Allows configuring Samsung S3C24XX MMC/SD/SDIO controller using a device tree.
Signed-off-by: Sergio Prado <[email protected]> --- drivers/mmc/host/s3cmci.c | 298 ++++++++++++++++++++++++---------------------- drivers/mmc/host/s3cmci.h | 3 +- 2 files changed, 158 insertions(+), 143 deletions(-) diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c index 7a173f8c455b..d066dbdb957c 100644 --- a/drivers/mmc/host/s3cmci.c +++ b/drivers/mmc/host/s3cmci.c @@ -24,6 +24,10 @@ #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/mmc/slot-gpio.h> #include <plat/gpio-cfg.h> #include <mach/dma.h> @@ -128,6 +132,22 @@ enum dbg_channels { dbg_conf = (1 << 8), }; +struct s3cmci_variant_data { + int s3c2440_compatible; +}; + +static const struct s3cmci_variant_data s3c2410_s3cmci_variant_data = { + .s3c2440_compatible = 0, +}; + +static const struct s3cmci_variant_data s3c2412_s3cmci_variant_data = { + .s3c2440_compatible = 1, +}; + +static const struct s3cmci_variant_data s3c2440_s3cmci_variant_data = { + .s3c2440_compatible = 1, +}; + static const int dbgmap_err = dbg_fail; static const int dbgmap_info = dbg_info | dbg_conf; static const int dbgmap_debug = dbg_err | dbg_debug; @@ -731,7 +751,7 @@ static irqreturn_t s3cmci_irq(int irq, void *dev_id) goto clear_status_bits; /* Check for FIFO failure */ - if (host->is2440) { + if (host->variant->s3c2440_compatible) { if (mci_fsta & S3C2440_SDIFSTA_FIFOFAIL) { dbg(host, dbg_err, "FIFO failure\n"); host->mrq->data->error = -EILSEQ; @@ -807,21 +827,6 @@ static irqreturn_t s3cmci_irq(int irq, void *dev_id) } -/* - * ISR for the CardDetect Pin -*/ - -static irqreturn_t s3cmci_irq_cd(int irq, void *dev_id) -{ - struct s3cmci_host *host = (struct s3cmci_host *)dev_id; - - dbg(host, dbg_irq, "card detect\n"); - - mmc_detect_change(host->mmc, msecs_to_jiffies(500)); - - return IRQ_HANDLED; -} - static void s3cmci_dma_done_callback(void *arg) { struct s3cmci_host *host = arg; @@ -913,7 +918,7 @@ static void finalize_request(struct s3cmci_host *host) if (s3cmci_host_usedma(host)) dmaengine_terminate_all(host->dma); - if (host->is2440) { + if (host->variant->s3c2440_compatible) { /* Clear failure register and reset fifo. */ writel(S3C2440_SDIFSTA_FIFORESET | S3C2440_SDIFSTA_FIFOFAIL, @@ -1026,7 +1031,7 @@ static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data) dcon |= S3C2410_SDIDCON_XFER_RXSTART; } - if (host->is2440) { + if (host->variant->s3c2440_compatible) { dcon |= S3C2440_SDIDCON_DS_WORD; dcon |= S3C2440_SDIDCON_DATSTART; } @@ -1045,7 +1050,7 @@ static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data) /* write TIMER register */ - if (host->is2440) { + if (host->variant->s3c2440_compatible) { writel(0x007FFFFF, host->base + S3C2410_SDITIMER); } else { writel(0x0000FFFF, host->base + S3C2410_SDITIMER); @@ -1177,19 +1182,6 @@ static void s3cmci_send_request(struct mmc_host *mmc) s3cmci_enable_irq(host, true); } -static int s3cmci_card_present(struct mmc_host *mmc) -{ - struct s3cmci_host *host = mmc_priv(mmc); - struct s3c24xx_mci_pdata *pdata = host->pdata; - int ret; - - if (pdata->no_detect) - return -ENOSYS; - - ret = gpio_get_value(pdata->gpio_detect) ? 0 : 1; - return ret ^ pdata->detect_invert; -} - static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq) { struct s3cmci_host *host = mmc_priv(mmc); @@ -1198,7 +1190,7 @@ static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq) host->cmd_is_stop = 0; host->mrq = mrq; - if (s3cmci_card_present(mmc) == 0) { + if (mmc_gpio_get_cd(mmc) == 0) { dbg(host, dbg_err, "%s: no medium present\n", __func__); host->mrq->cmd->error = -ENOMEDIUM; mmc_request_done(mmc, mrq); @@ -1242,22 +1234,24 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) case MMC_POWER_ON: case MMC_POWER_UP: /* Configure GPE5...GPE10 pins in SD mode */ - s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2), - S3C_GPIO_PULL_NONE); + if (!host->pdev->dev.of_node) + s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2), + S3C_GPIO_PULL_NONE); if (host->pdata->set_power) host->pdata->set_power(ios->power_mode, ios->vdd); - if (!host->is2440) + if (!host->variant->s3c2440_compatible) mci_con |= S3C2410_SDICON_FIFORESET; break; case MMC_POWER_OFF: default: - gpio_direction_output(S3C2410_GPE(5), 0); + if (!host->pdev->dev.of_node) + gpio_direction_output(S3C2410_GPE(5), 0); - if (host->is2440) + if (host->variant->s3c2440_compatible) mci_con |= S3C2440_SDICON_SDRESET; if (host->pdata->set_power) @@ -1295,21 +1289,6 @@ static void s3cmci_reset(struct s3cmci_host *host) writel(con, host->base + S3C2410_SDICON); } -static int s3cmci_get_ro(struct mmc_host *mmc) -{ - struct s3cmci_host *host = mmc_priv(mmc); - struct s3c24xx_mci_pdata *pdata = host->pdata; - int ret; - - if (pdata->no_wprotect) - return 0; - - ret = gpio_get_value(pdata->gpio_wprotect) ? 1 : 0; - ret ^= pdata->wprotect_invert; - - return ret; -} - static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable) { struct s3cmci_host *host = mmc_priv(mmc); @@ -1353,8 +1332,8 @@ static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable) static struct mmc_host_ops s3cmci_ops = { .request = s3cmci_request, .set_ios = s3cmci_set_ios, - .get_ro = s3cmci_get_ro, - .get_cd = s3cmci_card_present, + .get_ro = mmc_gpio_get_ro, + .get_cd = mmc_gpio_get_cd, .enable_sdio_irq = s3cmci_enable_sdio_irq, }; @@ -1430,7 +1409,7 @@ static int s3cmci_state_show(struct seq_file *seq, void *v) seq_printf(seq, "Register base = 0x%08x\n", (u32)host->base); seq_printf(seq, "Clock rate = %ld\n", host->clk_rate); seq_printf(seq, "Prescale = %d\n", host->prescaler); - seq_printf(seq, "is2440 = %d\n", host->is2440); + seq_printf(seq, "S3C2440 compatible = %d\n", host->variant->s3c2440_compatible); seq_printf(seq, "IRQ = %d\n", host->irq); seq_printf(seq, "IRQ enabled = %d\n", host->irq_enabled); seq_printf(seq, "IRQ disabled = %d\n", host->irq_disabled); @@ -1545,21 +1524,15 @@ static inline void s3cmci_debugfs_remove(struct s3cmci_host *host) { } #endif /* CONFIG_DEBUG_FS */ -static int s3cmci_probe(struct platform_device *pdev) +static int s3cmci_probe_pdata(struct s3cmci_host *host) { - struct s3cmci_host *host; - struct mmc_host *mmc; - int ret; - int is2440; - int i; + struct platform_device *pdev = host->pdev; + struct mmc_host *mmc = host->mmc; + struct s3c24xx_mci_pdata *pdata; + int i, ret; - is2440 = platform_get_device_id(pdev)->driver_data; - - mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev); - if (!mmc) { - ret = -ENOMEM; - goto probe_out; - } + host->variant = (const struct s3cmci_variant_data *) + platform_get_device_id(pdev)->driver_data; for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) { ret = gpio_request(i, dev_name(&pdev->dev)); @@ -1569,25 +1542,103 @@ static int s3cmci_probe(struct platform_device *pdev) for (i--; i >= S3C2410_GPE(5); i--) gpio_free(i); - goto probe_free_host; + return ret; } } + if (!pdev->dev.platform_data) + pdev->dev.platform_data = &s3cmci_def_pdata; + + pdata = pdev->dev.platform_data; + + if (pdata->no_wprotect) + mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; + + if (pdata->no_detect) + mmc->caps |= MMC_CAP_NEEDS_POLL; + + if (pdata->wprotect_invert); + mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; + + if (pdata->detect_invert) + mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH; + + if (gpio_is_valid(pdata->gpio_detect)) { + ret = mmc_gpio_request_cd(mmc, pdata->gpio_detect, 0); + if (ret) { + dev_err(&pdev->dev, "error requesting GPIO for CD %d\n", + ret); + return ret; + } + } + + if (gpio_is_valid(pdata->gpio_wprotect)) { + ret = mmc_gpio_request_ro(mmc, pdata->gpio_wprotect); + if (ret) { + dev_err(&pdev->dev, "error requesting GPIO for WP %d\n", + ret); + return ret; + } + } + + return 0; +} + +static int s3cmci_probe_dt(struct s3cmci_host *host) +{ + struct platform_device *pdev = host->pdev; + struct s3c24xx_mci_pdata *pdata; + struct mmc_host *mmc = host->mmc; + int ret; + + host->variant = of_device_get_match_data(&pdev->dev); + if (!host->variant) + return -ENODEV; + + ret = mmc_of_parse(mmc); + if (ret) + return ret; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdev->dev.platform_data = pdata; + + return 0; +} + +static int s3cmci_probe(struct platform_device *pdev) +{ + struct s3cmci_host *host; + struct mmc_host *mmc; + int ret; + int i; + + mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev); + if (!mmc) { + ret = -ENOMEM; + goto probe_out; + } + host = mmc_priv(mmc); host->mmc = mmc; host->pdev = pdev; - host->is2440 = is2440; + + if (pdev->dev.of_node) + ret = s3cmci_probe_dt(host); + else + ret = s3cmci_probe_pdata(host); + + if (ret) + goto probe_free_host; host->pdata = pdev->dev.platform_data; - if (!host->pdata) { - pdev->dev.platform_data = &s3cmci_def_pdata; - host->pdata = &s3cmci_def_pdata; - } spin_lock_init(&host->complete_lock); tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host); - if (is2440) { + if (host->variant->s3c2440_compatible) { host->sdiimsk = S3C2440_SDIIMSK; host->sdidata = S3C2440_SDIDATA; host->clk_div = 1; @@ -1645,43 +1696,6 @@ static int s3cmci_probe(struct platform_device *pdev) disable_irq(host->irq); host->irq_state = false; - if (!host->pdata->no_detect) { - ret = gpio_request(host->pdata->gpio_detect, "s3cmci detect"); - if (ret) { - dev_err(&pdev->dev, "failed to get detect gpio\n"); - goto probe_free_irq; - } - - host->irq_cd = gpio_to_irq(host->pdata->gpio_detect); - - if (host->irq_cd >= 0) { - if (request_irq(host->irq_cd, s3cmci_irq_cd, - IRQF_TRIGGER_RISING | - IRQF_TRIGGER_FALLING, - DRIVER_NAME, host)) { - dev_err(&pdev->dev, - "can't get card detect irq.\n"); - ret = -ENOENT; - goto probe_free_gpio_cd; - } - } else { - dev_warn(&pdev->dev, - "host detect has no irq available\n"); - gpio_direction_input(host->pdata->gpio_detect); - } - } else - host->irq_cd = -1; - - if (!host->pdata->no_wprotect) { - ret = gpio_request(host->pdata->gpio_wprotect, "s3cmci wp"); - if (ret) { - dev_err(&pdev->dev, "failed to get writeprotect\n"); - goto probe_free_irq_cd; - } - - gpio_direction_input(host->pdata->gpio_wprotect); - } - /* Depending on the dma state, get a DMA channel to use. */ if (s3cmci_host_usedma(host)) { @@ -1689,7 +1703,7 @@ static int s3cmci_probe(struct platform_device *pdev) ret = PTR_ERR_OR_ZERO(host->dma); if (ret) { dev_err(&pdev->dev, "cannot get DMA channel.\n"); - goto probe_free_gpio_wp; + goto probe_free_irq; } } @@ -1731,7 +1745,7 @@ static int s3cmci_probe(struct platform_device *pdev) dbg(host, dbg_debug, "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%p.\n", - (host->is2440?"2440":""), + (host->variant->s3c2440_compatible?"2440":""), host->base, host->irq, host->irq_cd, host->dma); ret = s3cmci_cpufreq_register(host); @@ -1768,18 +1782,6 @@ static int s3cmci_probe(struct platform_device *pdev) if (s3cmci_host_usedma(host)) dma_release_channel(host->dma); - probe_free_gpio_wp: - if (!host->pdata->no_wprotect) - gpio_free(host->pdata->gpio_wprotect); - - probe_free_gpio_cd: - if (!host->pdata->no_detect) - gpio_free(host->pdata->gpio_detect); - - probe_free_irq_cd: - if (host->irq_cd >= 0) - free_irq(host->irq_cd, host); - probe_free_irq: free_irq(host->irq, host); @@ -1790,8 +1792,9 @@ static int s3cmci_probe(struct platform_device *pdev) release_mem_region(host->mem->start, resource_size(host->mem)); probe_free_gpio: - for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) - gpio_free(i); + if (!pdev->dev.of_node) + for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) + gpio_free(i); probe_free_host: mmc_free_host(mmc); @@ -1818,7 +1821,6 @@ static int s3cmci_remove(struct platform_device *pdev) { struct mmc_host *mmc = platform_get_drvdata(pdev); struct s3cmci_host *host = mmc_priv(mmc); - struct s3c24xx_mci_pdata *pd = host->pdata; int i; s3cmci_shutdown(pdev); @@ -1832,15 +1834,9 @@ static int s3cmci_remove(struct platform_device *pdev) free_irq(host->irq, host); - if (!pd->no_wprotect) - gpio_free(pd->gpio_wprotect); - - if (!pd->no_detect) - gpio_free(pd->gpio_detect); - - for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) - gpio_free(i); - + if (!pdev->dev.of_node) + for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) + gpio_free(i); iounmap(host->base); release_mem_region(host->mem->start, resource_size(host->mem)); @@ -1849,16 +1845,33 @@ static int s3cmci_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id s3cmci_dt_match[] = { + { + .compatible = "samsung,s3c2410-sdi", + .data = &s3c2410_s3cmci_variant_data, + }, + { + .compatible = "samsung,s3c2412-sdi", + .data = &s3c2412_s3cmci_variant_data, + }, + { + .compatible = "samsung,s3c2440-sdi", + .data = &s3c2440_s3cmci_variant_data, + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); + static const struct platform_device_id s3cmci_driver_ids[] = { { .name = "s3c2410-sdi", - .driver_data = 0, + .driver_data = (kernel_ulong_t) &s3c2410_s3cmci_variant_data, }, { .name = "s3c2412-sdi", - .driver_data = 1, + .driver_data = (kernel_ulong_t) &s3c2412_s3cmci_variant_data, }, { .name = "s3c2440-sdi", - .driver_data = 1, + .driver_data = (kernel_ulong_t) &s3c2440_s3cmci_variant_data, }, { } }; @@ -1868,6 +1881,7 @@ static int s3cmci_remove(struct platform_device *pdev) static struct platform_driver s3cmci_driver = { .driver = { .name = "s3c-sdi", + .of_match_table = s3cmci_dt_match, }, .id_table = s3cmci_driver_ids, .probe = s3cmci_probe, diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h index 30c2c0dd1bc8..e9fe48915a2e 100644 --- a/drivers/mmc/host/s3cmci.h +++ b/drivers/mmc/host/s3cmci.h @@ -33,7 +33,8 @@ struct s3cmci_host { unsigned long real_rate; u8 prescaler; - int is2440; + const struct s3cmci_variant_data *variant; + unsigned sdiimsk; unsigned sdidata; -- 1.9.1
