diff options
author | Piotr Wilczek <p.wilczek@samsung.com> | 2014-03-07 13:59:41 (GMT) |
---|---|---|
committer | Minkyu Kang <mk7.kang@samsung.com> | 2014-03-12 10:54:59 (GMT) |
commit | 3577fe8be9dc8c8aa027361d6424efba9f97f553 (patch) | |
tree | 7591836e077264433d8cfd9eac38680a89fbe63e /drivers/mmc | |
parent | 1591ee73526ba4085cec7cc5bb83b2ece0f6706e (diff) | |
download | u-boot-3577fe8be9dc8c8aa027361d6424efba9f97f553.tar.xz |
drivers:mmc:sdhci: enable support for DT
This patch enables support for device tree for sdhci driver.
Non DT case is still supported.
Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r-- | drivers/mmc/s5p_sdhci.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c index 40ff873..ccae4cc 100644 --- a/drivers/mmc/s5p_sdhci.c +++ b/drivers/mmc/s5p_sdhci.c @@ -8,8 +8,15 @@ #include <common.h> #include <malloc.h> #include <sdhci.h> +#include <fdtdec.h> +#include <libfdt.h> +#include <asm/gpio.h> #include <asm/arch/mmc.h> #include <asm/arch/clk.h> +#include <errno.h> +#ifdef CONFIG_OF_CONTROL +#include <asm/arch/pinmux.h> +#endif static char *S5P_NAME = "SAMSUNG SDHCI"; static void s5p_sdhci_set_control_reg(struct sdhci_host *host) @@ -86,3 +93,125 @@ int s5p_sdhci_init(u32 regbase, int index, int bus_width) return add_sdhci(host, 52000000, 400000); } + +#ifdef CONFIG_OF_CONTROL +struct sdhci_host sdhci_host[SDHCI_MAX_HOSTS]; + +static int do_sdhci_init(struct sdhci_host *host) +{ + int dev_id, flag; + int err = 0; + + flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE; + dev_id = host->index + PERIPH_ID_SDMMC0; + + if (fdt_gpio_isvalid(&host->pwr_gpio)) { + gpio_direction_output(host->pwr_gpio.gpio, 1); + err = exynos_pinmux_config(dev_id, flag); + if (err) { + debug("MMC not configured\n"); + return err; + } + } + + if (fdt_gpio_isvalid(&host->cd_gpio)) { + gpio_direction_output(host->cd_gpio.gpio, 0xf); + if (gpio_get_value(host->cd_gpio.gpio)) + return -ENODEV; + + err = exynos_pinmux_config(dev_id, flag); + if (err) { + printf("external SD not configured\n"); + return err; + } + } + + host->name = S5P_NAME; + + host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE | + SDHCI_QUIRK_BROKEN_R1B | SDHCI_QUIRK_32BIT_DMA_ADDR | + SDHCI_QUIRK_WAIT_SEND_CMD; + host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; + host->version = sdhci_readw(host, SDHCI_HOST_VERSION); + + host->set_control_reg = &s5p_sdhci_set_control_reg; + host->set_clock = set_mmc_clk; + + host->host_caps = MMC_MODE_HC; + + return add_sdhci(host, 52000000, 400000); +} + +static int sdhci_get_config(const void *blob, int node, struct sdhci_host *host) +{ + int bus_width, dev_id; + unsigned int base; + + /* Get device id */ + dev_id = pinmux_decode_periph_id(blob, node); + if (dev_id < PERIPH_ID_SDMMC0 && dev_id > PERIPH_ID_SDMMC3) { + debug("MMC: Can't get device id\n"); + return -1; + } + host->index = dev_id - PERIPH_ID_SDMMC0; + + /* Get bus width */ + bus_width = fdtdec_get_int(blob, node, "samsung,bus-width", 0); + if (bus_width <= 0) { + debug("MMC: Can't get bus-width\n"); + return -1; + } + host->bus_width = bus_width; + + /* Get the base address from the device node */ + base = fdtdec_get_addr(blob, node, "reg"); + if (!base) { + debug("MMC: Can't get base address\n"); + return -1; + } + host->ioaddr = (void *)base; + + fdtdec_decode_gpio(blob, node, "pwr-gpios", &host->pwr_gpio); + fdtdec_decode_gpio(blob, node, "cd-gpios", &host->cd_gpio); + + return 0; +} + +static int process_nodes(const void *blob, int node_list[], int count) +{ + struct sdhci_host *host; + int i, node; + + debug("%s: count = %d\n", __func__, count); + + /* build sdhci_host[] for each controller */ + for (i = 0; i < count; i++) { + node = node_list[i]; + if (node <= 0) + continue; + + host = &sdhci_host[i]; + + if (sdhci_get_config(blob, node, host)) { + printf("%s: failed to decode dev %d\n", __func__, i); + return -1; + } + do_sdhci_init(host); + } + return 0; +} + +int exynos_mmc_init(const void *blob) +{ + int count; + int node_list[SDHCI_MAX_HOSTS]; + + count = fdtdec_find_aliases_for_id(blob, "mmc", + COMPAT_SAMSUNG_EXYNOS_MMC, node_list, + SDHCI_MAX_HOSTS); + + process_nodes(blob, node_list, count); + + return 1; +} +#endif |