Commit 865e9f13 authored by Pierre Ossman's avatar Pierre Ossman Committed by Russell King

[MMC] ios for mmc chip select

Adds a new ios for setting the chip select pin on MMC cards. Needed on
SD controllers which use this pin for other things and therefore cannot
have it pulled high at all times.
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent f505380b
...@@ -457,6 +457,11 @@ static void mmc_idle_cards(struct mmc_host *host) ...@@ -457,6 +457,11 @@ static void mmc_idle_cards(struct mmc_host *host)
{ {
struct mmc_command cmd; struct mmc_command cmd;
host->ios.chip_select = MMC_CS_HIGH;
host->ops->set_ios(host, &host->ios);
mmc_delay(1);
cmd.opcode = MMC_GO_IDLE_STATE; cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0; cmd.arg = 0;
cmd.flags = MMC_RSP_NONE; cmd.flags = MMC_RSP_NONE;
...@@ -464,6 +469,11 @@ static void mmc_idle_cards(struct mmc_host *host) ...@@ -464,6 +469,11 @@ static void mmc_idle_cards(struct mmc_host *host)
mmc_wait_for_cmd(host, &cmd, 0); mmc_wait_for_cmd(host, &cmd, 0);
mmc_delay(1); mmc_delay(1);
host->ios.chip_select = MMC_CS_DONTCARE;
host->ops->set_ios(host, &host->ios);
mmc_delay(1);
} }
/* /*
...@@ -475,6 +485,7 @@ static void mmc_power_up(struct mmc_host *host) ...@@ -475,6 +485,7 @@ static void mmc_power_up(struct mmc_host *host)
host->ios.vdd = bit; host->ios.vdd = bit;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_UP; host->ios.power_mode = MMC_POWER_UP;
host->ops->set_ios(host, &host->ios); host->ops->set_ios(host, &host->ios);
...@@ -492,6 +503,7 @@ static void mmc_power_off(struct mmc_host *host) ...@@ -492,6 +503,7 @@ static void mmc_power_off(struct mmc_host *host)
host->ios.clock = 0; host->ios.clock = 0;
host->ios.vdd = 0; host->ios.vdd = 0;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_OFF; host->ios.power_mode = MMC_POWER_OFF;
host->ops->set_ios(host, &host->ios); host->ops->set_ios(host, &host->ios);
} }
......
...@@ -46,6 +46,12 @@ struct mmc_ios { ...@@ -46,6 +46,12 @@ struct mmc_ios {
#define MMC_BUSMODE_OPENDRAIN 1 #define MMC_BUSMODE_OPENDRAIN 1
#define MMC_BUSMODE_PUSHPULL 2 #define MMC_BUSMODE_PUSHPULL 2
unsigned char chip_select; /* SPI chip select */
#define MMC_CS_DONTCARE 0
#define MMC_CS_HIGH 1
#define MMC_CS_LOW 2
unsigned char power_mode; /* power supply mode */ unsigned char power_mode; /* power supply mode */
#define MMC_POWER_OFF 0 #define MMC_POWER_OFF 0
......
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