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Commit 2b4baab3 authored by wwang's avatar wwang Committed by Greg Kroah-Hartman
Browse files

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: default avatarwwang <wei_wang@realsil.com.cn>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a0138163

drivers/staging/rts_pstor/sd.c

+41 −21
Original line number Diff line number Diff line
@@ -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) {

	} 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;

#endif

	} else {

		} else if (retval == SWITCH_FAIL) {

			CLR_MMC_8BIT(sd_card);

			CLR_MMC_4BIT(sd_card);

		} else {

			TRACE_RET(chip, STATUS_FAIL);

		}

	} else {

		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 @@ static int reset_mmc(struct rtsx_chip *chip) 


	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 @@ static int reset_mmc(struct rtsx_chip *chip) 
					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 @@ static int reset_mmc(struct rtsx_chip *chip) 
						TRACE_RET(chip, STATUS_FAIL);

					}

					switch_ddr = 0;

					goto DDR_TUNING_FAIL;

					TRACE_GOTO(chip, Switch_Fail);

				}

			}

		}

drivers/staging/rts_pstor/sd.h

+5 −0
Original line number Diff line number Diff line
@@ -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