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| author | Andy Ross <andy.ross@windriver.com> | 2011-01-03 10:36:56 -0800 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-01-08 23:52:25 -0500 |
| commit | 807e8e40673d9628fa7dcdd14423424b4ee5f43b (patch) | |
| tree | ca95bdb69d07f0169bbfc5388e15745b9811513e /drivers/mmc/core/sdio.c | |
| parent | 08c82dfad2458f8f9b83126224a85e7ea9e2b046 (diff) | |
| download | talos-obmc-linux-807e8e40673d9628fa7dcdd14423424b4ee5f43b.tar.gz talos-obmc-linux-807e8e40673d9628fa7dcdd14423424b4ee5f43b.zip | |
mmc: Fix sd/sdio/mmc initialization frequency retries
Rewrite and clean up mmc_rescan() to properly retry frequencies lower
than 400kHz. Failures can happen both in sd_send_* calls and
mmc_attach_*. Break out "mmc_rescan_try_freq" from the frequency
selection loop. Symmetrize claim/release logic in mmc_attach_* API,
and move the sd_send_* calls there to make mmc_rescan easier to read.
Signed-off-by: Andy Ross <andy.ross@windriver.com>
Reviewed-and-Tested-by: Hein Tibosch <hein_tibosch@yahoo.es>
Reviewed-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/core/sdio.c')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 82f4b9008987..5c4a54d9b6a4 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -702,15 +702,19 @@ static const struct mmc_bus_ops mmc_sdio_ops = { /* * Starting point for SDIO card init. */ -int mmc_attach_sdio(struct mmc_host *host, u32 ocr) +int mmc_attach_sdio(struct mmc_host *host) { - int err; - int i, funcs; + int err, i, funcs; + u32 ocr; struct mmc_card *card; BUG_ON(!host); WARN_ON(!host->claimed); + err = mmc_send_io_op_cond(host, 0, &ocr); + if (err) + return err; + mmc_attach_bus(host, &mmc_sdio_ops); if (host->ocr_avail_sdio) host->ocr_avail = host->ocr_avail_sdio; @@ -783,12 +787,12 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) pm_runtime_enable(&card->sdio_func[i]->dev); } - mmc_release_host(host); - /* * First add the card to the driver model... */ + mmc_release_host(host); err = mmc_add_card(host->card); + mmc_claim_host(host); if (err) goto remove_added; @@ -806,15 +810,17 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) remove_added: /* Remove without lock if the device has been added. */ + mmc_release_host(host); mmc_sdio_remove(host); mmc_claim_host(host); remove: /* And with lock if it hasn't been added. */ + mmc_release_host(host); if (host->card) mmc_sdio_remove(host); + mmc_claim_host(host); err: mmc_detach_bus(host); - mmc_release_host(host); printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n", mmc_hostname(host), err); |
