From 261bbd463a091b939770255d559bbc89b1bad568 Mon Sep 17 00:00:00 2001 From: Philip Rakity Date: Fri, 13 May 2011 11:17:17 +0530 Subject: [PATCH] mmc: core: eMMC signal voltage does not use CMD11 eMMC chips do not use CMD11 when changing voltage. Add extra argument to call to indicate if CMD11 needs to be sent. Signed-off-by: Philip Rakity Reviewed-by: Arindam Nath Signed-off-by: Chris Ball --- drivers/mmc/core/core.c | 4 ++-- drivers/mmc/core/core.h | 3 ++- drivers/mmc/core/sd.c | 4 ++-- 3 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 72e113e..94c8d5a 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -942,7 +942,7 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) return ocr; } -int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) +int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11) { struct mmc_command cmd = {0}; int err = 0; @@ -953,7 +953,7 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) * Send CMD11 only if the request is to switch the card to * 1.8V signalling. */ - if (signal_voltage == MMC_SIGNAL_VOLTAGE_180) { + if ((signal_voltage != MMC_SIGNAL_VOLTAGE_330) && cmd11) { cmd.opcode = SD_SWITCH_VOLTAGE; cmd.arg = 0; cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 93f3397..53d23c2 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -41,7 +41,8 @@ void mmc_set_bus_width(struct mmc_host *host, unsigned int width); void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, unsigned int ddr); u32 mmc_select_voltage(struct mmc_host *host, u32 ocr); -int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage); +int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, + bool cmd11); void mmc_set_timing(struct mmc_host *host, unsigned int timing); void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type); diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index b461b29..596d0b9 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -725,7 +725,7 @@ try_again: */ if (!mmc_host_is_spi(host) && rocr && ((*rocr & 0x41000000) == 0x41000000)) { - err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); + err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true); if (err) { ocr &= ~SD_OCR_S18R; goto try_again; @@ -1098,7 +1098,7 @@ int mmc_attach_sd(struct mmc_host *host) WARN_ON(!host->claimed); /* Make sure we are at 3.3V signalling voltage */ - err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); + err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false); if (err) return err; -- 2.7.4