diff options
| author | Stephen Warren <swarren@nvidia.com> | 2011-10-31 06:51:36 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-12-09 17:30:08 +0100 |
| commit | 9877841f6bba3723f5d21cc58eb99f3417e90725 (patch) | |
| tree | f49cfd7af63e74b3e02cafbbf95e2d484e39dddc /drivers/mmc | |
| parent | ae03661fda98465420016b410a27e6bf2a3c03f4 (diff) | |
tegra2: Modify MMC driver to handle power and cd GPIOs
Pass the GPIO numbers for power and card detect to tegra2_mmc_init(), and
modify that function to perform all required GPIO initialization. This
removes the need for board files to perform these operations.
Move board_mmc_getcd() into tegra2_mmc.c now that the driver knows which
GPIOs to use.
Update affected call-sites in seaboard.c and harmony.c. Note that this
change should make all SD ports work on Harmony, since the required GPIO
setup is now being performed.
v4: Fix prototype of tegra2_mmc_init() in board.h to match driver change.
Remove prototype of gpio_config_mmc() from board.h
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Andy Fleming <afleming@gmail.com>
Tested-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/tegra2_mmc.c | 42 | ||||
| -rw-r--r-- | drivers/mmc/tegra2_mmc.h | 4 |
2 files changed, 39 insertions, 7 deletions
diff --git a/drivers/mmc/tegra2_mmc.c b/drivers/mmc/tegra2_mmc.c index ccf48bbb17..035a8687df 100644 --- a/drivers/mmc/tegra2_mmc.c +++ b/drivers/mmc/tegra2_mmc.c @@ -21,6 +21,7 @@ #include <common.h> #include <mmc.h> +#include <asm/gpio.h> #include <asm/io.h> #include <asm/arch/clk_rst.h> #include <asm/arch/clock.h> @@ -473,20 +474,37 @@ static int mmc_core_init(struct mmc *mmc) return 0; } -static int tegra2_mmc_initialize(int dev_index, int bus_width) +int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio) { struct mmc_host *host; + char gpusage[12]; /* "SD/MMCn PWR" or "SD/MMCn CD" */ struct mmc *mmc; - debug(" mmc_initialize called\n"); + debug(" tegra2_mmc_init: index %d, bus width %d " + "pwr_gpio %d cd_gpio %d\n", + dev_index, bus_width, pwr_gpio, cd_gpio); host = &mmc_host[dev_index]; host->clock = 0; + host->pwr_gpio = pwr_gpio; + host->cd_gpio = cd_gpio; tegra2_get_setup(host, dev_index); clock_start_periph_pll(host->mmc_id, CLOCK_ID_PERIPH, 20000000); + if (host->pwr_gpio >= 0) { + sprintf(gpusage, "SD/MMC%d PWR", dev_index); + gpio_request(host->pwr_gpio, gpusage); + gpio_direction_output(host->pwr_gpio, 1); + } + + if (host->cd_gpio >= 0) { + sprintf(gpusage, "SD/MMC%d CD", dev_index); + gpio_request(host->cd_gpio, gpusage); + gpio_direction_input(host->cd_gpio); + } + mmc = &mmc_dev[dev_index]; sprintf(mmc->name, "Tegra2 SD/MMC"); @@ -518,9 +536,21 @@ static int tegra2_mmc_initialize(int dev_index, int bus_width) return 0; } -int tegra2_mmc_init(int dev_index, int bus_width) +/* this is a weak define that we are overriding */ +int board_mmc_getcd(u8 *cd, struct mmc *mmc) { - debug(" tegra2_mmc_init: index %d, bus width %d\n", - dev_index, bus_width); - return tegra2_mmc_initialize(dev_index, bus_width); + struct mmc_host *host = (struct mmc_host *)mmc->priv; + + debug("board_mmc_getcd called\n"); + + *cd = 1; /* Assume card is inserted, or eMMC */ + + if (IS_SD(mmc)) { + if (host->cd_gpio >= 0) { + if (gpio_get_value(host->cd_gpio)) + *cd = 0; + } + } + + return 0; } diff --git a/drivers/mmc/tegra2_mmc.h b/drivers/mmc/tegra2_mmc.h index 671583c422..b2f6c5baad 100644 --- a/drivers/mmc/tegra2_mmc.h +++ b/drivers/mmc/tegra2_mmc.h @@ -123,9 +123,11 @@ struct mmc_host { unsigned int clock; /* Current clock (MHz) */ unsigned int base; /* Base address, SDMMC1/2/3/4 */ enum periph_id mmc_id; /* Peripheral ID: PERIPH_ID_... */ + int pwr_gpio; /* Power GPIO */ + int cd_gpio; /* Change Detect GPIO */ }; -int tegra2_mmc_init(int dev_index, int bus_width); +int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio); #endif /* __ASSEMBLY__ */ #endif /* __TEGRA2_MMC_H_ */ |