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staging: rts_pstor: fix a bug that a greenhouse sd card can't be recognized 

A greenhouse sd card can't be recognized using rts5209.
To fix this bug, these modifications are applied:
1, Move some codes which clear sd internal variables from sd_init_type to
sd_prepare_reset. So sd_init_type is useless any more and is removed
entirely;
2, If a sd card can't pass sd3.0 mode, the action of tunning phase should be
avoided when retrying sd2.0 mode.

Signed-off-by: wwang <wei_wang@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
wwang 2011-03-04 10:56:36 +08:00 коммит произвёл Greg Kroah-Hartman
Родитель 1254a459a3
Коммит 2d2322b269
1 изменённых файлов: 32 добавлений и 24 удалений
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56
drivers/staging/rts_pstor/sd.c
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@ -1265,6 +1265,7 @@ static int sd_switch_function(struct rtsx_chip *chip, u8 bus_width)
sd_card->func_group1_mask &= ~(sd_card->sd_switch_fail);
/* Function Group 1: Access Mode */
for (i = 0; i < 4; i++) {
switch ((u8)(chip->sd_speed_prior >> (i*8))) {
case SDR104_SUPPORT:
@ -1349,6 +1350,14 @@ static int sd_switch_function(struct rtsx_chip *chip, u8 bus_width)
}
}
if (!func_to_switch || (func_to_switch == HS_SUPPORT)) {
/* Do not try to switch current limit if the card doesn't
* support UHS mode or we don't want it to support UHS mode
*/
return STATUS_SUCCESS;
}
/* Function Group 4: Current Limit */
func_to_switch = 0xFF;
for (i = 0; i < 4; i++) {
@ -2015,6 +2024,17 @@ static int sd_prepare_reset(struct rtsx_chip *chip)
sd_card->sd_clock = CLK_30;
}
sd_card->sd_type = 0;
sd_card->seq_mode = 0;
sd_card->sd_data_buf_ready = 0;
sd_card->capacity = 0;
#ifdef SUPPORT_SD_LOCK
sd_card->sd_lock_status = 0;
sd_card->sd_erase_status = 0;
#endif
chip->capacity[chip->card2lun[SD_CARD]] = 0;
chip->sd_io = 0;
retval = sd_set_init_para(chip);
@ -2504,6 +2524,15 @@ SD_UNLOCK_ENTRY:
sd_dont_switch = 1;
if (!sd_dont_switch) {
if (sd20_mode) {
/* Set sd_switch_fail here, because we needn't
* switch to UHS mode
*/
sd_card->sd_switch_fail = SDR104_SUPPORT_MASK |
DDR50_SUPPORT_MASK | SDR50_SUPPORT_MASK;
}
/* Check the card whether follow SD1.1 spec or higher */
retval = sd_check_spec(chip, switch_bus_width);
if (retval == STATUS_SUCCESS) {
retval = sd_switch_function(chip, switch_bus_width);
@ -2546,7 +2575,7 @@ SD_UNLOCK_ENTRY:
sd_card->sd_lock_status &= ~SD_LOCK_1BIT_MODE;
#endif
if (CHK_SD30_SPEED(sd_card)) {
if (!sd20_mode && CHK_SD30_SPEED(sd_card)) {
int read_lba0 = 1;
RTSX_WRITE_REG(chip, SD30_DRIVE_SEL, 0x07, chip->sd30_drive_sel_1v8);
@ -3040,28 +3069,6 @@ MMC_UNLOCK_ENTRY:
return STATUS_SUCCESS;
}
static void sd_init_type(struct rtsx_chip *chip)
{
struct sd_info *sd_card = &(chip->sd_card);
memset(sd_card, 0, sizeof(struct sd_info));
sd_card->sd_type = 0;
sd_card->seq_mode = 0;
sd_card->sd_data_buf_ready = 0;
sd_card->capacity = 0;
sd_card->sd_switch_fail = 0;
sd_card->mmc_dont_switch_bus = 0;
sd_card->need_retune = 0;
#ifdef SUPPORT_SD_LOCK
sd_card->sd_lock_status = 0;
sd_card->sd_erase_status = 0;
#endif
chip->capacity[chip->card2lun[SD_CARD]] = sd_card->capacity = 0;
}
int reset_sd_card(struct rtsx_chip *chip)
{
struct sd_info *sd_card = &(chip->sd_card);
@ -3069,7 +3076,8 @@ int reset_sd_card(struct rtsx_chip *chip)
sd_init_reg_addr(chip);
sd_init_type(chip);
memset(sd_card, 0, sizeof(struct sd_info));
chip->capacity[chip->card2lun[SD_CARD]] = 0;
retval = enable_card_clock(chip, SD_CARD);
if (retval != STATUS_SUCCESS) {