From 2b4baab313fefc4eaef7a034f5ff8c8c08a48daf Mon Sep 17 00:00:00 2001 From: wwang Date: Tue, 5 Jul 2011 11:07:50 +0800 Subject: [PATCH] staging: rts_pstor: Fix a bug that a MMCPlus card can't be accessed 1. Don't switch bus if cmd14 timedout 2. Add a new group of return codes for mmc_test_switch_bus Signed-off-by: wwang Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rts_pstor/sd.c | 62 ++++++++++++++++++++++------------ drivers/staging/rts_pstor/sd.h | 5 +++ 2 files changed, 46 insertions(+), 21 deletions(-) diff --git a/drivers/staging/rts_pstor/sd.c b/drivers/staging/rts_pstor/sd.c index cdae497d546..e4b3891a4f2 100644 --- a/drivers/staging/rts_pstor/sd.c +++ b/drivers/staging/rts_pstor/sd.c @@ -2661,7 +2661,7 @@ static int mmc_test_switch_bus(struct rtsx_chip *chip, u8 width) retval = sd_send_cmd_get_rsp(chip, BUSTEST_W, 0, SD_RSP_TYPE_R1, NULL, 0); if (retval != STATUS_SUCCESS) { - TRACE_RET(chip, STATUS_FAIL); + TRACE_RET(chip, SWITCH_FAIL); } if (width == MMC_8BIT_BUS) { @@ -2678,7 +2678,9 @@ static int mmc_test_switch_bus(struct rtsx_chip *chip, u8 width) } if (!CHECK_PID(chip, 0x5209)) { - RTSX_WRITE_REG(chip, REG_SD_CFG3, 0x02, 0x02); + retval = rtsx_write_register(chip, REG_SD_CFG3, 0x02, 0x02); + if (retval != STATUS_SUCCESS) + TRACE_RET(chip, SWITCH_ERR); } retval = sd_write_data(chip, SD_TM_AUTO_WRITE_3, @@ -2690,17 +2692,19 @@ static int mmc_test_switch_bus(struct rtsx_chip *chip, u8 width) rtsx_read_register(chip, REG_SD_STAT2, &val2); rtsx_clear_sd_error(chip); if ((val1 & 0xE0) || val2) { - TRACE_RET(chip, STATUS_FAIL); + TRACE_RET(chip, SWITCH_ERR); } } else { rtsx_clear_sd_error(chip); rtsx_write_register(chip, REG_SD_CFG3, 0x02, 0); - TRACE_RET(chip, STATUS_FAIL); + TRACE_RET(chip, SWITCH_ERR); } } if (!CHECK_PID(chip, 0x5209)) { - RTSX_WRITE_REG(chip, REG_SD_CFG3, 0x02, 0); + retval = rtsx_write_register(chip, REG_SD_CFG3, 0x02, 0); + if (retval != STATUS_SUCCESS) + TRACE_RET(chip, SWITCH_ERR); } RTSX_DEBUGP("SD/MMC CMD %d\n", BUSTEST_R); @@ -2733,7 +2737,7 @@ static int mmc_test_switch_bus(struct rtsx_chip *chip, u8 width) retval = rtsx_send_cmd(chip, SD_CARD, 100); if (retval < 0) { rtsx_clear_sd_error(chip); - TRACE_RET(chip, STATUS_FAIL); + TRACE_RET(chip, SWITCH_ERR); } ptr = rtsx_get_cmd_data(chip) + 1; @@ -2751,7 +2755,7 @@ static int mmc_test_switch_bus(struct rtsx_chip *chip, u8 width) } retval = sd_send_cmd_get_rsp(chip, SWITCH, arg, SD_RSP_TYPE_R1b, rsp, 5); if ((retval == STATUS_SUCCESS) && !(rsp[4] & MMC_SWITCH_ERR)) { - return STATUS_SUCCESS; + return SWITCH_SUCCESS; } } } else { @@ -2767,12 +2771,12 @@ static int mmc_test_switch_bus(struct rtsx_chip *chip, u8 width) } retval = sd_send_cmd_get_rsp(chip, SWITCH, arg, SD_RSP_TYPE_R1b, rsp, 5); if ((retval == STATUS_SUCCESS) && !(rsp[4] & MMC_SWITCH_ERR)) { - return STATUS_SUCCESS; + return SWITCH_SUCCESS; } } } - TRACE_RET(chip, STATUS_FAIL); + TRACE_RET(chip, SWITCH_FAIL); } @@ -2880,21 +2884,30 @@ static int mmc_switch_timing_bus(struct rtsx_chip *chip, int switch_ddr) TRACE_RET(chip, STATUS_FAIL); } - if (mmc_test_switch_bus(chip, MMC_8BIT_BUS) == STATUS_SUCCESS) { + /* Test Bus Procedure */ + retval = mmc_test_switch_bus(chip, MMC_8BIT_BUS); + if (retval == SWITCH_SUCCESS) { SET_MMC_8BIT(sd_card); chip->card_bus_width[chip->card2lun[SD_CARD]] = 8; #ifdef SUPPORT_SD_LOCK sd_card->sd_lock_status &= ~SD_LOCK_1BIT_MODE; #endif - } else if (mmc_test_switch_bus(chip, MMC_4BIT_BUS) == STATUS_SUCCESS) { - SET_MMC_4BIT(sd_card); - chip->card_bus_width[chip->card2lun[SD_CARD]] = 4; + } else if (retval == SWITCH_FAIL) { + retval = mmc_test_switch_bus(chip, MMC_4BIT_BUS); + if (retval == SWITCH_SUCCESS) { + SET_MMC_4BIT(sd_card); + chip->card_bus_width[chip->card2lun[SD_CARD]] = 4; #ifdef SUPPORT_SD_LOCK - sd_card->sd_lock_status &= ~SD_LOCK_1BIT_MODE; + sd_card->sd_lock_status &= ~SD_LOCK_1BIT_MODE; #endif + } else if (retval == SWITCH_FAIL) { + CLR_MMC_8BIT(sd_card); + CLR_MMC_4BIT(sd_card); + } else { + TRACE_RET(chip, STATUS_FAIL); + } } else { - CLR_MMC_8BIT(sd_card); - CLR_MMC_4BIT(sd_card); + TRACE_RET(chip, STATUS_FAIL); } return STATUS_SUCCESS; @@ -2915,8 +2928,7 @@ static int reset_mmc(struct rtsx_chip *chip) goto MMC_UNLOCK_ENTRY; #endif -DDR_TUNING_FAIL: - +Switch_Fail: retval = sd_prepare_reset(chip); if (retval != STATUS_SUCCESS) { TRACE_RET(chip, retval); @@ -3017,7 +3029,15 @@ MMC_UNLOCK_ENTRY: if (!sd_card->mmc_dont_switch_bus) { if (spec_ver == 4) { - (void)mmc_switch_timing_bus(chip, switch_ddr); + /* MMC 4.x Cards */ + retval = mmc_switch_timing_bus(chip, switch_ddr); + if (retval != STATUS_SUCCESS) { + retval = sd_init_power(chip); + if (retval != STATUS_SUCCESS) + TRACE_RET(chip, STATUS_FAIL); + sd_card->mmc_dont_switch_bus = 1; + TRACE_GOTO(chip, Switch_Fail); + } } if (CHK_MMC_SECTOR_MODE(sd_card) && (sd_card->capacity == 0)) { @@ -3037,7 +3057,7 @@ MMC_UNLOCK_ENTRY: TRACE_RET(chip, STATUS_FAIL); } switch_ddr = 0; - goto DDR_TUNING_FAIL; + TRACE_GOTO(chip, Switch_Fail); } retval = sd_wait_state_data_ready(chip, 0x08, 1, 1000); @@ -3049,7 +3069,7 @@ MMC_UNLOCK_ENTRY: TRACE_RET(chip, STATUS_FAIL); } switch_ddr = 0; - goto DDR_TUNING_FAIL; + TRACE_GOTO(chip, Switch_Fail); } } } diff --git a/drivers/staging/rts_pstor/sd.h b/drivers/staging/rts_pstor/sd.h index d62e690e963..1df1aa75e93 100644 --- a/drivers/staging/rts_pstor/sd.h +++ b/drivers/staging/rts_pstor/sd.h @@ -38,6 +38,11 @@ #define SD_RSP_TIMEOUT 0x04 #define SD_IO_ERR 0x02 +/* Return code for MMC switch bus */ +#define SWITCH_SUCCESS 0 +#define SWITCH_ERR 1 +#define SWITCH_FAIL 2 + /* MMC/SD Command Index */ /* Basic command (class 0) */ #define GO_IDLE_STATE 0