diff options
Diffstat (limited to 'drivers/mmc/host/mmci.c')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 90 |
1 files changed, 86 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 032b84791a16..50ff19a62368 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -15,6 +15,7 @@ #include <linux/device.h> #include <linux/interrupt.h> #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/highmem.h> @@ -25,6 +26,7 @@ #include <linux/clk.h> #include <linux/scatterlist.h> #include <linux/gpio.h> +#include <linux/of_gpio.h> #include <linux/regulator/consumer.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> @@ -94,6 +96,17 @@ static struct variant_data variant_u300 = { .signal_direction = true, }; +static struct variant_data variant_nomadik = { + .fifosize = 16 * 4, + .fifohalfsize = 8 * 4, + .clkreg = MCI_CLK_ENABLE, + .datalength_bits = 24, + .sdio = true, + .st_clkdiv = true, + .pwrreg_powerup = MCI_PWR_ON, + .signal_direction = true, +}; + static struct variant_data variant_ux500 = { .fifosize = 30 * 4, .fifohalfsize = 8 * 4, @@ -1196,21 +1209,77 @@ static const struct mmc_host_ops mmci_ops = { .get_cd = mmci_get_cd, }; +#ifdef CONFIG_OF +static void mmci_dt_populate_generic_pdata(struct device_node *np, + struct mmci_platform_data *pdata) +{ + int bus_width = 0; + + pdata->gpio_wp = of_get_named_gpio(np, "wp-gpios", 0); + pdata->gpio_cd = of_get_named_gpio(np, "cd-gpios", 0); + + if (of_get_property(np, "cd-inverted", NULL)) + pdata->cd_invert = true; + else + pdata->cd_invert = false; + + of_property_read_u32(np, "max-frequency", &pdata->f_max); + if (!pdata->f_max) + pr_warn("%s has no 'max-frequency' property\n", np->full_name); + + if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL)) + pdata->capabilities |= MMC_CAP_MMC_HIGHSPEED; + if (of_get_property(np, "mmc-cap-sd-highspeed", NULL)) + pdata->capabilities |= MMC_CAP_SD_HIGHSPEED; + + of_property_read_u32(np, "bus-width", &bus_width); + switch (bus_width) { + case 0 : + /* No bus-width supplied. */ + break; + case 4 : + pdata->capabilities |= MMC_CAP_4_BIT_DATA; + break; + case 8 : + pdata->capabilities |= MMC_CAP_8_BIT_DATA; + break; + default : + pr_warn("%s: Unsupported bus width\n", np->full_name); + } +} +#else +static void mmci_dt_populate_generic_pdata(struct device_node *np, + struct mmci_platform_data *pdata) +{ + return; +} +#endif + static int __devinit mmci_probe(struct amba_device *dev, const struct amba_id *id) { struct mmci_platform_data *plat = dev->dev.platform_data; + struct device_node *np = dev->dev.of_node; struct variant_data *variant = id->data; struct mmci_host *host; struct mmc_host *mmc; int ret; - /* must have platform data */ + /* Must have platform data or Device Tree. */ + if (!plat && !np) { + dev_err(&dev->dev, "No plat data or DT found\n"); + return -EINVAL; + } + if (!plat) { - ret = -EINVAL; - goto out; + plat = devm_kzalloc(&dev->dev, sizeof(*plat), GFP_KERNEL); + if (!plat) + return -ENOMEM; } + if (np) + mmci_dt_populate_generic_pdata(np, plat); + ret = amba_request_regions(dev, DRIVER_NAME); if (ret) goto out; @@ -1356,6 +1425,10 @@ static int __devinit mmci_probe(struct amba_device *dev, writel(0, host->base + MMCIMASK1); writel(0xfff, host->base + MMCICLEAR); + if (plat->gpio_cd == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto err_gpio_cd; + } if (gpio_is_valid(plat->gpio_cd)) { ret = gpio_request(plat->gpio_cd, DRIVER_NAME " (cd)"); if (ret == 0) @@ -1379,6 +1452,10 @@ static int __devinit mmci_probe(struct amba_device *dev, if (ret >= 0) host->gpio_cd_irq = gpio_to_irq(plat->gpio_cd); } + if (plat->gpio_wp == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto err_gpio_wp; + } if (gpio_is_valid(plat->gpio_wp)) { ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)"); if (ret == 0) @@ -1397,7 +1474,7 @@ static int __devinit mmci_probe(struct amba_device *dev, if (ret) goto unmap; - if (dev->irq[1] == NO_IRQ || !dev->irq[1]) + if (!dev->irq[1]) host->singleirq = true; else { ret = request_irq(dev->irq[1], mmci_pio_irq, IRQF_SHARED, @@ -1569,6 +1646,11 @@ static struct amba_id mmci_ids[] = { .data = &variant_u300, }, { + .id = 0x10180180, + .mask = 0xf0ffffff, + .data = &variant_nomadik, + }, + { .id = 0x00280180, .mask = 0x00ffffff, .data = &variant_u300, |