diff options
Diffstat (limited to 'drivers/mmc/core/core.c')
| -rw-r--r-- | drivers/mmc/core/core.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index c5338cd45aa7..35f3df8810e0 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -272,13 +272,44 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host, { int err = 0; struct mmc_async_req *data = host->areq; + struct mmc_card *card = host->card; + struct timeval before_time, after_time; /* Prepare a new request */ if (areq) mmc_pre_req(host, areq->mrq, !host->areq); if (host->areq) { + if (card->ext_csd.refresh && + (host->areq->mrq->data->flags & MMC_DATA_WRITE)) + do_gettimeofday(&before_time); mmc_wait_for_req_done(host, host->areq->mrq); + if (card->ext_csd.refresh && + (host->areq->mrq->data->flags & MMC_DATA_WRITE)) { + do_gettimeofday(&after_time); + switch (after_time.tv_sec - before_time.tv_sec) { + case 0: + if (after_time.tv_usec - + before_time.tv_usec >= + MMC_SLOW_WRITE_TIME) { + card->ext_csd.last_tv_sec = + after_time.tv_sec; + card->ext_csd.last_bkops_tv_sec = + after_time.tv_sec; + } + break; + case 1: + if (after_time.tv_usec - + before_time.tv_usec < + MMC_SLOW_WRITE_TIME - 1000000) + break; + default: + card->ext_csd.last_tv_sec = + after_time.tv_sec; + card->ext_csd.last_bkops_tv_sec = + after_time.tv_sec; + } + } err = host->areq->err_check(host->card, host->areq); if (err) { mmc_post_req(host, host->areq->mrq, 0); @@ -331,6 +362,7 @@ int mmc_bkops_start(struct mmc_card *card, bool is_synchronous) { int err; unsigned long flags; + struct timeval before_time, after_time; BUG_ON(!card); @@ -338,10 +370,29 @@ int mmc_bkops_start(struct mmc_card *card, bool is_synchronous) return 1; mmc_claim_host(card->host); + if (card->ext_csd.refresh) + do_gettimeofday(&before_time); err = mmc_send_bk_ops_cmd(card, is_synchronous); if (err) pr_err("%s: abort bk ops (%d error)\n", mmc_hostname(card->host), err); + if (card->ext_csd.refresh) { + do_gettimeofday(&after_time); + switch (after_time.tv_sec - before_time.tv_sec) { + case 0: + if (after_time.tv_usec - before_time.tv_usec >= + MMC_SLOW_WRITE_TIME) + card->ext_csd.last_tv_sec = after_time.tv_sec; + break; + case 1: + if (after_time.tv_usec - before_time.tv_usec < + MMC_SLOW_WRITE_TIME - 1000000) + break; + default: + card->ext_csd.last_tv_sec = after_time.tv_sec; + } + card->ext_csd.last_bkops_tv_sec = after_time.tv_sec; + } /* * Incase of asynchronous backops, set card state @@ -360,6 +411,57 @@ int mmc_bkops_start(struct mmc_card *card, bool is_synchronous) } EXPORT_SYMBOL(mmc_bkops_start); +static void mmc_bkops_work(struct work_struct *work) +{ + struct mmc_card *card = container_of(work, struct mmc_card, bkops); + mmc_bkops_start(card, true); +} + +static void mmc_refresh_work(struct work_struct *work) +{ + struct mmc_card *card = container_of(work, struct mmc_card, refresh); + char buf[512]; + mmc_gen_cmd(card, buf, 0x44, 0x1, 0x0, 0x1); +} + +void mmc_refresh(unsigned long data) +{ + struct mmc_card *card = (struct mmc_card *) data; + struct timeval cur_time; + __kernel_time_t timeout, timeout1, timeout2; + + if ((!card) || (!card->ext_csd.refresh)) + return; + + INIT_WORK(&card->bkops, (work_func_t) mmc_bkops_work); + INIT_WORK(&card->refresh, (work_func_t) mmc_refresh_work); + + do_gettimeofday(&cur_time); + timeout1 = MMC_REFRESH_INTERVAL - (cur_time.tv_sec - + card->ext_csd.last_tv_sec); + if ((cur_time.tv_sec < card->ext_csd.last_tv_sec) || + (timeout1 <= 0)) { + queue_work(workqueue, &card->refresh); + card->ext_csd.last_tv_sec = cur_time.tv_sec; + card->ext_csd.last_bkops_tv_sec = cur_time.tv_sec; + timeout1 = MMC_REFRESH_INTERVAL; + } + + timeout2 = MMC_BKOPS_INTERVAL - (cur_time.tv_sec - + card->ext_csd.last_bkops_tv_sec); + if ((cur_time.tv_sec < card->ext_csd.last_bkops_tv_sec) || + (timeout2 <= 0)) { + mmc_card_set_need_bkops(card); + queue_work(workqueue, &card->bkops); + timeout2 = MMC_BKOPS_INTERVAL; + } + + timeout = timeout1 < timeout2 ? timeout1 : timeout2; + card->timer.expires = jiffies + timeout*HZ; + add_timer(&card->timer); +} +EXPORT_SYMBOL(mmc_refresh); + /** * mmc_interrupt_hpi - Issue for High priority Interrupt * @card: the MMC card associated with the HPI transfer |