diff options
| author | Mohit Kataria <mkataria@nvidia.com> | 2012-06-05 15:05:31 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-06-11 16:27:31 -0700 |
| commit | 5702f8c67472c05feb28a3f45550bb7ab1ca865d (patch) | |
| tree | 5f0e8d293cbd0df207e69136c28c856cf1fd8be6 /drivers/mmc/core/mmc.c | |
| parent | a79e68c19180953ba479b3730e2945974660b43d (diff) | |
mmc: proactively issue bkops_start and refresh
Adding CMD56 implementation.
Doing the following for manfid 0x90 and FW revisions 0x73 and
0x7b (both are non-standard custom FW):
1. Adding change to issue BKOPS_START whenever 20 seconds have gone
by without any slow write operations.
2. Adding change to issue CMD56 to refresh (custom feature) 1 block
whenever 60 seconds have gone by without any slow write operations.
Corresponding changes are already there in embedded branches:
http://git-master/r/#change,93247
http://git-master/r/#change,97555
Bug 847037.
Bug 874256.
Bug 963737.
Change-Id: Ie36b52620a75320abfedc36d1408647b36eddb46
Signed-off-by: Vishal Singh <vissingh@nvidia.com>
Reviewed-on: http://git-master/r/102259
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Luis Dib <ldib@nvidia.com>
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Diffstat (limited to 'drivers/mmc/core/mmc.c')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 69fb2275845c..254713bce18c 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -96,6 +96,7 @@ static int mmc_decode_cid(struct mmc_card *card) card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); + card->cid.prod_rev = UNSTUFF_BITS(resp, 48, 8); card->cid.serial = UNSTUFF_BITS(resp, 16, 32); card->cid.month = UNSTUFF_BITS(resp, 12, 4); card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; @@ -425,6 +426,11 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) /* Check whether the eMMC card supports background ops */ if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) card->ext_csd.bk_ops = 1; + + /* Check whether the eMMC card needs proactive refresh */ + if ((card->cid.manfid == 0x90) && ((card->cid.prod_rev == 0x73) + || (card->cid.prod_rev == 0x7b))) + card->ext_csd.refresh = 1; } if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) @@ -672,6 +678,17 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if (err) goto free_card; + if (card->ext_csd.refresh) { + init_timer(&card->timer); + card->timer.data = (unsigned long) card; + card->timer.function = mmc_refresh; + card->timer.expires = MMC_BKOPS_INTERVAL < + MMC_REFRESH_INTERVAL ? MMC_BKOPS_INTERVAL : + MMC_REFRESH_INTERVAL; + card->timer.expires *= HZ; + card->timer.expires += jiffies; + add_timer(&card->timer); + } /* If doing byte addressing, check if required to do sector * addressing. Handle the case of <2GB cards needing sector * addressing. See section 8.1 JEDEC Standard JED84-A441; |