diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-12 11:51:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-12 11:51:57 -0700 |
commit | 46b5e34029fef7a042f3ff16e319e737257e5c7b (patch) | |
tree | c2e90b7a6d7c39c3a35eed1dfd0fd19077467c93 /drivers/mmc/core | |
parent | 94a9f8ad337aec011da2ca901ef89ae7e885f24c (diff) | |
parent | 6ee6c6adf1cfebbf432b8d1f204c7f96e395933e (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (24 commits)
MMC: Use timeout values from CSR
MMC: CSD and CID timeout values
sdhci: 'scratch' may be used uninitialized
mmc: explicitly mention SDIO support in Kconfig
mmc: remove redundant "depends on"
Fix comment in include/linux/mmc/host.h
sdio: high-speed support
mmc_block: hard code 512 byte block size
sdhci: force high speed capability on some controllers
mmc_block: filter out PC requests
mmc_block: indicate strict ordering
mmc_block: inform block layer about sector count restriction
sdio: give sdio irq thread a host specific name
sdio: make sleep on error interruptable
sdhci: reduce card detection delay
sdhci: let the controller wait for busy state to end
atmel-mci: Add missing flush_dcache_page() in PIO transfer code
atmel-mci: Don't overwrite error bits when NOTBUSY is set
atmel-mci: Add experimental DMA support
atmel-mci: support multiple mmc slots
...
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r-- | drivers/mmc/core/mmc_ops.c | 8 | ||||
-rw-r--r-- | drivers/mmc/core/sdio.c | 52 | ||||
-rw-r--r-- | drivers/mmc/core/sdio_irq.c | 16 |
3 files changed, 66 insertions, 10 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 64b05c6270f..9c50e6f1c23 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -248,8 +248,12 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, sg_init_one(&sg, data_buf, len); - if (card) - mmc_set_data_timeout(&data, card); + /* + * The spec states that CSR and CID accesses have a timeout + * of 64 clock cycles. + */ + data.timeout_ns = 0; + data.timeout_clks = 64; mmc_wait_for_req(host, &mrq); diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 4eab79e09cc..fb99ccff908 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -165,6 +165,36 @@ static int sdio_enable_wide(struct mmc_card *card) } /* + * Test if the card supports high-speed mode and, if so, switch to it. + */ +static int sdio_enable_hs(struct mmc_card *card) +{ + int ret; + u8 speed; + + if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) + return 0; + + if (!card->cccr.high_speed) + return 0; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); + if (ret) + return ret; + + speed |= SDIO_SPEED_EHS; + + ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); + if (ret) + return ret; + + mmc_card_set_highspeed(card); + mmc_set_timing(card->host, MMC_TIMING_SD_HS); + + return 0; +} + +/* * Host is being removed. Free up the current card. */ static void mmc_sdio_remove(struct mmc_host *host) @@ -333,10 +363,26 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) goto remove; /* - * No support for high-speed yet, so just set - * the card's maximum speed. + * Switch to high-speed (if supported). */ - mmc_set_clock(host, card->cis.max_dtr); + err = sdio_enable_hs(card); + if (err) + goto remove; + + /* + * Change to the card's maximum speed. + */ + if (mmc_card_highspeed(card)) { + /* + * The SDIO specification doesn't mention how + * the CIS transfer speed register relates to + * high-speed, but it seems that 50 MHz is + * mandatory. + */ + mmc_set_clock(host, 50000000); + } else { + mmc_set_clock(host, card->cis.max_dtr); + } /* * Switch to wider bus (if supported). diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c index c292e124107..bb192f90e8e 100644 --- a/drivers/mmc/core/sdio_irq.c +++ b/drivers/mmc/core/sdio_irq.c @@ -5,6 +5,8 @@ * Created: June 18, 2007 * Copyright: MontaVista Software Inc. * + * Copyright 2008 Pierre Ossman + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at @@ -107,11 +109,14 @@ static int sdio_irq_thread(void *_host) /* * Give other threads a chance to run in the presence of - * errors. FIXME: determine if due to card removal and - * possibly exit this thread if so. + * errors. */ - if (ret < 0) - ssleep(1); + if (ret < 0) { + set_current_state(TASK_INTERRUPTIBLE); + if (!kthread_should_stop()) + schedule_timeout(HZ); + set_current_state(TASK_RUNNING); + } /* * Adaptive polling frequency based on the assumption @@ -154,7 +159,8 @@ static int sdio_card_irq_get(struct mmc_card *card) if (!host->sdio_irqs++) { atomic_set(&host->sdio_irq_thread_abort, 0); host->sdio_irq_thread = - kthread_run(sdio_irq_thread, host, "ksdiorqd"); + kthread_run(sdio_irq_thread, host, "ksdioirqd/%s", + mmc_hostname(host)); if (IS_ERR(host->sdio_irq_thread)) { int err = PTR_ERR(host->sdio_irq_thread); host->sdio_irqs--; |