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sunxi: Add mmc card-detect functionality

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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede 2014-10-02 20:29:26 +02:00
parent 7ad3b6aa37
commit cd82113a98
3 changed files with 48 additions and 0 deletions
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26
board/sunxi/Kconfig
View file

@ -41,4 +41,30 @@ config SYS_SOC
config FDTFILE
string "Default fdtfile env setting for this board"
config MMC0_CD_PIN
string "Card detect pin for mmc0"
default ""
---help---
Set the card detect pin for mmc0, leave empty to not use cd. This
takes a string in the format understood by sunxi_name_to_gpio, e.g.
PH1 for pin 1 of port H.
config MMC1_CD_PIN
string "Card detect pin for mmc1"
default ""
---help---
See MMC0_CD_PIN help text.
config MMC2_CD_PIN
string "Card detect pin for mmc2"
default ""
---help---
See MMC0_CD_PIN help text.
config MMC3_CD_PIN
string "Card detect pin for mmc3"
default ""
---help---
See MMC0_CD_PIN help text.
endif

21
drivers/mmc/sunxi_mmc.c
View file

@ -14,7 +14,9 @@
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/cpu.h>
#include <asm/arch/gpio.h>
#include <asm/arch/mmc.h>
#include <asm-generic/gpio.h>
struct sunxi_mmc_host {
unsigned mmc_no;
@ -346,10 +348,29 @@ out:
return error;
}
static int sunxi_mmc_getcd(struct mmc *mmc)
{
struct sunxi_mmc_host *mmchost = mmc->priv;
int cd_pin = -1;
switch (mmchost->mmc_no) {
case 0: cd_pin = sunxi_name_to_gpio(CONFIG_MMC0_CD_PIN); break;
case 1: cd_pin = sunxi_name_to_gpio(CONFIG_MMC1_CD_PIN); break;
case 2: cd_pin = sunxi_name_to_gpio(CONFIG_MMC2_CD_PIN); break;
case 3: cd_pin = sunxi_name_to_gpio(CONFIG_MMC3_CD_PIN); break;
}
if (cd_pin == -1)
return 1;
return !gpio_direction_input(cd_pin);
}
static const struct mmc_ops sunxi_mmc_ops = {
.send_cmd = mmc_send_cmd,
.set_ios = mmc_set_ios,
.init = mmc_core_init,
.getcd = sunxi_mmc_getcd,
};
int sunxi_mmc_init(int sdc_no)

1
include/configs/sunxi-common.h
View file

@ -181,6 +181,7 @@
/* GPIO */
#define CONFIG_SUNXI_GPIO
#define CONFIG_SPL_GPIO_SUPPORT
#define CONFIG_CMD_GPIO
/* Ethernet support */