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authorStephen Warren <swarren@nvidia.com>2011-10-31 06:51:36 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-12-09 17:30:08 +0100
commit9877841f6bba3723f5d21cc58eb99f3417e90725 (patch)
treef49cfd7af63e74b3e02cafbbf95e2d484e39dddc /drivers/mmc
parentae03661fda98465420016b410a27e6bf2a3c03f4 (diff)
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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.c42
-rw-r--r--drivers/mmc/tegra2_mmc.h4
2 files changed, 39 insertions, 7 deletions
diff --git a/drivers/mmc/tegra2_mmc.c b/drivers/mmc/tegra2_mmc.c
index ccf48bb..035a868 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 671583c..b2f6c5b 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_ */