}
/*
- * Apply power to the MMC stack.
+ * Apply power to the MMC stack. This is a two-stage process.
+ * First, we enable power to the card without the clock running.
+ * We then wait a bit for the power to stabilise. Finally,
+ * enable the bus drivers and clock to the card.
+ *
+ * We must _NOT_ enable the clock prior to power stablising.
+ *
+ * If a host does all the power sequencing itself, ignore the
+ * initial MMC_POWER_UP stage.
*/
static void mmc_power_up(struct mmc_host *host)
{
cmd.opcode = SD_SEND_RELATIVE_ADDR;
cmd.arg = 0;
- cmd.flags = MMC_RSP_R1;
+ cmd.flags = MMC_RSP_R6;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err != MMC_ERR_NONE)
sg_init_one(&sg, (u8*)card->raw_scr, 8);
- err = mmc_wait_for_req(host, &mrq);
- if (err != MMC_ERR_NONE) {
+ mmc_wait_for_req(host, &mrq);
+
+ if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
mmc_card_set_dead(card);
continue;
}
/**
* mmc_detect_change - process change of state on a MMC socket
* @host: host which changed state.
+ * @delay: optional delay to wait before detection (jiffies)
*
* All we know is that card(s) have been inserted or removed
* from the socket(s). We don't know which socket or cards.
*/
-void mmc_detect_change(struct mmc_host *host)
+void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
- schedule_work(&host->detect);
+ if (delay)
+ schedule_delayed_work(&host->detect, delay);
+ else
+ schedule_work(&host->detect);
}
EXPORT_SYMBOL(mmc_detect_change);
ret = mmc_add_host_sysfs(host);
if (ret == 0) {
mmc_power_off(host);
- mmc_detect_change(host);
+ mmc_detect_change(host, 0);
}
return ret;
*/
int mmc_resume_host(struct mmc_host *host)
{
- mmc_detect_change(host);
+ mmc_rescan(host);
return 0;
}