aboutsummaryrefslogtreecommitdiff
path: root/drivers/mmc/core/core.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc/core/core.c')
-rw-r--r--drivers/mmc/core/core.c107
1 files changed, 62 insertions, 45 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 26491173275..d84c880fac8 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -708,7 +708,13 @@ static void mmc_power_up(struct mmc_host *host)
*/
mmc_delay(10);
- host->ios.clock = host->f_min;
+ if (host->f_min > 400000) {
+ pr_warning("%s: Minimum clock frequency too high for "
+ "identification mode\n", mmc_hostname(host));
+ host->ios.clock = host->f_min;
+ } else
+ host->ios.clock = 400000;
+
host->ios.power_mode = MMC_POWER_ON;
mmc_set_ios(host);
@@ -855,61 +861,72 @@ void mmc_rescan(struct work_struct *work)
mmc_bus_get(host);
- if (host->bus_ops == NULL) {
- /*
- * Only we can add a new handler, so it's safe to
- * release the lock here.
- */
+ /* if there is a card registered, check whether it is still present */
+ if ((host->bus_ops != NULL) && host->bus_ops->detect && !host->bus_dead)
+ host->bus_ops->detect(host);
+
+ mmc_bus_put(host);
+
+
+ mmc_bus_get(host);
+
+ /* if there still is a card present, stop here */
+ if (host->bus_ops != NULL) {
mmc_bus_put(host);
+ goto out;
+ }
- if (host->ops->get_cd && host->ops->get_cd(host) == 0)
- goto out;
+ /* detect a newly inserted card */
- mmc_claim_host(host);
+ /*
+ * Only we can add a new handler, so it's safe to
+ * release the lock here.
+ */
+ mmc_bus_put(host);
- mmc_power_up(host);
- mmc_go_idle(host);
+ if (host->ops->get_cd && host->ops->get_cd(host) == 0)
+ goto out;
- mmc_send_if_cond(host, host->ocr_avail);
+ mmc_claim_host(host);
- /*
- * First we search for SDIO...
- */
- err = mmc_send_io_op_cond(host, 0, &ocr);
- if (!err) {
- if (mmc_attach_sdio(host, ocr))
- mmc_power_off(host);
- goto out;
- }
+ mmc_power_up(host);
+ mmc_go_idle(host);
- /*
- * ...then normal SD...
- */
- err = mmc_send_app_op_cond(host, 0, &ocr);
- if (!err) {
- if (mmc_attach_sd(host, ocr))
- mmc_power_off(host);
- goto out;
- }
+ mmc_send_if_cond(host, host->ocr_avail);
- /*
- * ...and finally MMC.
- */
- err = mmc_send_op_cond(host, 0, &ocr);
- if (!err) {
- if (mmc_attach_mmc(host, ocr))
- mmc_power_off(host);
- goto out;
- }
+ /*
+ * First we search for SDIO...
+ */
+ err = mmc_send_io_op_cond(host, 0, &ocr);
+ if (!err) {
+ if (mmc_attach_sdio(host, ocr))
+ mmc_power_off(host);
+ goto out;
+ }
- mmc_release_host(host);
- mmc_power_off(host);
- } else {
- if (host->bus_ops->detect && !host->bus_dead)
- host->bus_ops->detect(host);
+ /*
+ * ...then normal SD...
+ */
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+ if (!err) {
+ if (mmc_attach_sd(host, ocr))
+ mmc_power_off(host);
+ goto out;
+ }
- mmc_bus_put(host);
+ /*
+ * ...and finally MMC.
+ */
+ err = mmc_send_op_cond(host, 0, &ocr);
+ if (!err) {
+ if (mmc_attach_mmc(host, ocr))
+ mmc_power_off(host);
+ goto out;
}
+
+ mmc_release_host(host);
+ mmc_power_off(host);
+
out:
if (host->caps & MMC_CAP_NEEDS_POLL)
mmc_schedule_delayed_work(&host->detect, HZ);