On 02/07/2012 01:48 PM, Adrian Hunter wrote:
Let drivers specify the use of high-capacity erase size.
Signed-off-by: Adrian Hunter<[email protected]>
---
drivers/mmc/core/mmc.c | 3 ++-
include/linux/mmc/host.h | 1 +
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 6b13776..bd2f71f 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -949,7 +949,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
* If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
* bit. This bit will be lost every time after a reset or power off.
*/
- if (card->ext_csd.enhanced_area_en) {
+ if (card->ext_csd.enhanced_area_en ||
+ (card->ext_csd.rev>= 3&& (host->caps2& MMC_CAP2_HC_ERASE_SZ))) {
This will default disable this feature. Is that what we want?
Why the need to disable this at all?
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GROUP_DEF, 1,
card->ext_csd.generic_cmd6_time);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 20d7c82..c7ce9d2 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -258,6 +258,7 @@ struct mmc_host {
#define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \
MMC_CAP2_HS200_1_2V_SDR)
#define MMC_CAP2_BROKEN_VOLTAGE (1<< 7) /* Use the broken voltage */
+#define MMC_CAP2_HC_ERASE_SZ (1<< 8) /* High-capacity erase size */
mmc_pm_flag_t pm_caps; /* supported pm features */
unsigned int power_notify_type;
Br
Ulf Hansson
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