[MMC] Cleanup 385e3227d4
Rather than having two places which independently calculate the timeout for data transfers, make it a library function instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Pierre Ossman <drzeus@drzeus.cx>
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@ -247,6 +247,55 @@ int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
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EXPORT_SYMBOL(mmc_wait_for_app_cmd);
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/**
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* mmc_set_data_timeout - set the timeout for a data command
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* @data: data phase for command
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* @card: the MMC card associated with the data transfer
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* @write: flag to differentiate reads from writes
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*/
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void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
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int write)
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{
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unsigned int mult;
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/*
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* SD cards use a 100 multiplier rather than 10
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*/
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mult = mmc_card_sd(card) ? 100 : 10;
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/*
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* Scale up the multiplier (and therefore the timeout) by
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* the r2w factor for writes.
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*/
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if (write)
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mult <<= card->csd.r2w_factor;
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data->timeout_ns = card->csd.tacc_ns * mult;
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data->timeout_clks = card->csd.tacc_clks * mult;
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/*
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* SD cards also have an upper limit on the timeout.
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*/
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if (mmc_card_sd(card)) {
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unsigned int timeout_us, limit_us;
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timeout_us = data->timeout_ns / 1000;
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timeout_us += data->timeout_clks * 1000 /
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(card->host->ios.clock / 1000);
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if (write)
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limit_us = 250000;
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else
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limit_us = 100000;
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if (timeout_us > limit_us) {
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data->timeout_ns = limit_us * 1000;
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data->timeout_clks = 0;
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}
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}
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}
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EXPORT_SYMBOL(mmc_set_data_timeout);
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static int mmc_select_card(struct mmc_host *host, struct mmc_card *card);
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/**
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@ -908,12 +957,9 @@ static void mmc_read_scrs(struct mmc_host *host)
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{
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int err;
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struct mmc_card *card;
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struct mmc_request mrq;
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struct mmc_command cmd;
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struct mmc_data data;
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unsigned int timeout_us;
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struct scatterlist sg;
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list_for_each_entry(card, &host->cards, node) {
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@ -948,17 +994,7 @@ static void mmc_read_scrs(struct mmc_host *host)
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memset(&data, 0, sizeof(struct mmc_data));
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data.timeout_ns = card->csd.tacc_ns * 100;
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data.timeout_clks = card->csd.tacc_clks * 100;
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timeout_us = data.timeout_ns / 1000;
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timeout_us += data.timeout_clks * 1000 /
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(host->ios.clock / 1000);
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if (timeout_us > 100000) {
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data.timeout_ns = 100000000;
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data.timeout_clks = 0;
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}
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mmc_set_data_timeout(&data, card, 0);
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data.blksz_bits = 3;
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data.blksz = 1 << 3;
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@ -179,40 +179,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
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brq.stop.arg = 0;
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brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
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brq.data.timeout_ns = card->csd.tacc_ns * 10;
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brq.data.timeout_clks = card->csd.tacc_clks * 10;
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/*
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* Scale up the timeout by the r2w factor
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*/
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if (rq_data_dir(req) == WRITE) {
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brq.data.timeout_ns <<= card->csd.r2w_factor;
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brq.data.timeout_clks <<= card->csd.r2w_factor;
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}
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/*
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* SD cards use a 100 multiplier and has a upper limit
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*/
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if (mmc_card_sd(card)) {
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unsigned int limit_us, timeout_us;
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brq.data.timeout_ns *= 10;
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brq.data.timeout_clks *= 10;
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if (rq_data_dir(req) == READ)
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limit_us = 100000;
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else
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limit_us = 250000;
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timeout_us = brq.data.timeout_ns / 1000;
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timeout_us += brq.data.timeout_clks * 1000 /
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(card->host->ios.clock / 1000);
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if (timeout_us > limit_us) {
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brq.data.timeout_ns = limit_us * 1000;
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brq.data.timeout_clks = 0;
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}
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}
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mmc_set_data_timeout(&brq.data, card, rq_data_dir(req) != READ);
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if (rq_data_dir(req) == READ) {
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brq.cmd.opcode = brq.data.blocks > 1 ? MMC_READ_MULTIPLE_BLOCK : MMC_READ_SINGLE_BLOCK;
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@ -105,6 +105,8 @@ extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
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extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int,
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struct mmc_command *, int);
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extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int);
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extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card);
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static inline void mmc_claim_host(struct mmc_host *host)
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