diff options
Diffstat (limited to 'drivers/mmc/arm_pl180_mmci.c')
| -rw-r--r-- | drivers/mmc/arm_pl180_mmci.c | 187 |
1 files changed, 170 insertions, 17 deletions
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c index ddf8383f1c..89a7c19242 100644 --- a/drivers/mmc/arm_pl180_mmci.c +++ b/drivers/mmc/arm_pl180_mmci.c @@ -12,12 +12,29 @@ /* #define DEBUG */ -#include <asm/io.h> #include "common.h" +#include <clk.h> #include <errno.h> +#include <malloc.h> #include <mmc.h> + +#include <asm/io.h> +#include <asm-generic/gpio.h> + #include "arm_pl180_mmci.h" -#include <malloc.h> + +#ifdef CONFIG_DM_MMC +#include <dm.h> +DECLARE_GLOBAL_DATA_PTR; + +#define MMC_CLOCK_MAX 48000000 +#define MMC_CLOCK_MIN 400000 + +struct arm_pl180_mmc_plat { + struct mmc_config cfg; + struct mmc mmc; +}; +#endif static int wait_for_command_end(struct mmc *dev, struct mmc_cmd *cmd) { @@ -265,16 +282,6 @@ static int host_request(struct mmc *dev, return result; } -/* MMC uses open drain drivers in the enumeration phase */ -static int mmc_host_reset(struct mmc *dev) -{ - struct pl180_mmc_host *host = dev->priv; - - writel(host->pwr_init, &host->base->power); - - return 0; -} - static int host_set_ios(struct mmc *dev) { struct pl180_mmc_host *host = dev->priv; @@ -337,20 +344,31 @@ static int host_set_ios(struct mmc *dev) return 0; } +#ifndef CONFIG_DM_MMC +/* MMC uses open drain drivers in the enumeration phase */ +static int mmc_host_reset(struct mmc *dev) +{ + struct pl180_mmc_host *host = dev->priv; + + writel(host->pwr_init, &host->base->power); + + return 0; +} + static const struct mmc_ops arm_pl180_mmci_ops = { .send_cmd = host_request, .set_ios = host_set_ios, .init = mmc_host_reset, }; +#endif /* * mmc_host_init - initialize the mmc controller. * Set initial clock and power for mmc slot. * Initialize mmc struct and register with mmc framework. */ -int arm_pl180_mmci_init(struct pl180_mmc_host *host) +int arm_pl180_mmci_init(struct pl180_mmc_host *host, struct mmc **mmc) { - struct mmc *mmc; u32 sdi_u32; writel(host->pwr_init, &host->base->power); @@ -362,7 +380,9 @@ int arm_pl180_mmci_init(struct pl180_mmc_host *host) writel(sdi_u32, &host->base->mask0); host->cfg.name = host->name; +#ifndef CONFIG_DM_MMC host->cfg.ops = &arm_pl180_mmci_ops; +#endif /* TODO remove the duplicates */ host->cfg.host_caps = host->caps; host->cfg.voltages = host->voltages; @@ -373,11 +393,144 @@ int arm_pl180_mmci_init(struct pl180_mmc_host *host) else host->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; - mmc = mmc_create(&host->cfg, host); - if (mmc == NULL) + *mmc = mmc_create(&host->cfg, host); + if (!*mmc) return -1; - debug("registered mmc interface number is:%d\n", mmc->block_dev.devnum); + debug("registered mmc interface number is:%d\n", + (*mmc)->block_dev.devnum); return 0; } + +#ifdef CONFIG_DM_MMC +static int arm_pl180_mmc_probe(struct udevice *dev) +{ + struct arm_pl180_mmc_plat *pdata = dev_get_platdata(dev); + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct mmc *mmc = &pdata->mmc; + struct pl180_mmc_host *host = mmc->priv; + struct clk clk; + u32 bus_width; + int ret; + + ret = clk_get_by_index(dev, 0, &clk); + if (ret < 0) + return ret; + + ret = clk_enable(&clk); + if (ret) { + dev_err(dev, "failed to enable clock\n"); + return ret; + } + + strcpy(host->name, "MMC"); + host->pwr_init = INIT_PWR; + host->clkdiv_init = SDI_CLKCR_CLKDIV_INIT_V1 | SDI_CLKCR_CLKEN | + SDI_CLKCR_HWFC_EN; + host->voltages = VOLTAGE_WINDOW_SD; + host->caps = 0; + host->clock_in = clk_get_rate(&clk); + host->clock_min = host->clock_in / (2 * (SDI_CLKCR_CLKDIV_INIT_V1 + 1)); + host->clock_max = dev_read_u32_default(dev, "max-frequency", + MMC_CLOCK_MAX); + host->version2 = dev_get_driver_data(dev); + + gpio_request_by_name(dev, "cd-gpios", 0, &host->cd_gpio, GPIOD_IS_IN); + + bus_width = dev_read_u32_default(dev, "bus-width", 1); + switch (bus_width) { + case 8: + host->caps |= MMC_MODE_8BIT; + /* Hosts capable of 8-bit transfers can also do 4 bits */ + case 4: + host->caps |= MMC_MODE_4BIT; + break; + case 1: + break; + default: + dev_err(dev, "Invalid bus-width value %u\n", bus_width); + } + + ret = arm_pl180_mmci_init(host, &mmc); + if (ret) { + dev_err(dev, "arm_pl180_mmci init failed\n"); + return ret; + } + + mmc->dev = dev; + dev->priv = host; + upriv->mmc = mmc; + + return 0; +} + +static int dm_host_request(struct udevice *dev, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + struct mmc *mmc = mmc_get_mmc_dev(dev); + + return host_request(mmc, cmd, data); +} + +static int dm_host_set_ios(struct udevice *dev) +{ + struct mmc *mmc = mmc_get_mmc_dev(dev); + + return host_set_ios(mmc); +} + +static int dm_mmc_getcd(struct udevice *dev) +{ + struct arm_pl180_mmc_plat *pdata = dev_get_platdata(dev); + struct mmc *mmc = &pdata->mmc; + struct pl180_mmc_host *host = mmc->priv; + int value = 1; + + if (dm_gpio_is_valid(&host->cd_gpio)) { + value = dm_gpio_get_value(&host->cd_gpio); + if (host->cd_inverted) + return !value; + } + + return value; +} + +static const struct dm_mmc_ops arm_pl180_dm_mmc_ops = { + .send_cmd = dm_host_request, + .set_ios = dm_host_set_ios, + .get_cd = dm_mmc_getcd, +}; + +static int arm_pl180_mmc_ofdata_to_platdata(struct udevice *dev) +{ + struct arm_pl180_mmc_plat *pdata = dev_get_platdata(dev); + struct mmc *mmc = &pdata->mmc; + struct pl180_mmc_host *host = mmc->priv; + fdt_addr_t addr; + + addr = devfdt_get_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + host->base = (void *)addr; + + return 0; +} + +static const struct udevice_id arm_pl180_mmc_match[] = { + { .compatible = "st,stm32f4xx-sdio", .data = VERSION1 }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(arm_pl180_mmc) = { + .name = "arm_pl180_mmc", + .id = UCLASS_MMC, + .of_match = arm_pl180_mmc_match, + .ops = &arm_pl180_dm_mmc_ops, + .probe = arm_pl180_mmc_probe, + .ofdata_to_platdata = arm_pl180_mmc_ofdata_to_platdata, + .priv_auto_alloc_size = sizeof(struct pl180_mmc_host), + .platdata_auto_alloc_size = sizeof(struct arm_pl180_mmc_plat), +}; +#endif |