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drivers: mmc: tegra: Add fake card detect support

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Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
This commit is contained in:
Dmitry Shmidt
2010-05-12 14:44:10 -07:00
committed by Colin Cross
parent f2e8abd844
commit 4d23ef5fbb
2 changed files with 46 additions and 0 deletions
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45
drivers/mmc/host/sdhci-tegra.c
View File

@@ -33,6 +33,7 @@
struct tegra_sdhci_host {
struct sdhci_host *sdhci;
struct clk *clk;
struct tegra_sdhci_platform_data *plat;
};
static irqreturn_t carddetect_irq(int irq, void *data)
@@ -43,6 +44,34 @@ static irqreturn_t carddetect_irq(int irq, void *data)
return IRQ_HANDLED;
};
static void sdhci_status_notify_cb(int card_present, void *dev_id)
{
struct sdhci_host *host = (struct sdhci_host *)dev_id;
struct tegra_sdhci_host *tegra_host = sdhci_priv(host);
unsigned int status, oldstat;
pr_debug("%s: card_present %d\n", mmc_hostname(host->mmc),
card_present);
if (!tegra_host->plat->mmc_data.status) {
mmc_detect_change(host->mmc, 0);
return;
}
status = tegra_host->plat->mmc_data.status(mmc_dev(host->mmc));
oldstat = host->card_present;
host->card_present = status;
if (status ^ oldstat) {
pr_debug("%s: Slot status change detected (%d -> %d)\n",
mmc_hostname(host->mmc), oldstat, status);
if (status)
mmc_detect_change(host->mmc, (5 * HZ) / 2);
else
mmc_detect_change(host->mmc, 0);
}
}
static int tegra_sdhci_enable_dma(struct sdhci_host *host)
{
return 0;
@@ -86,6 +115,16 @@ static int __devinit tegra_sdhci_probe(struct platform_device *pdev)
host = sdhci_priv(sdhci);
host->sdhci = sdhci;
host->plat = plat;
#ifdef CONFIG_MMC_EMBEDDED_SDIO
if (plat->mmc_data.embedded_sdio)
mmc_set_embedded_sdio_data(sdhci->mmc,
&plat->mmc_data.embedded_sdio->cis,
&plat->mmc_data.embedded_sdio->cccr,
plat->mmc_data.embedded_sdio->funcs,
plat->mmc_data.embedded_sdio->num_funcs);
#endif
host->clk = clk_get(&pdev->dev, plat->clk_id);
if (IS_ERR(host->clk)) {
@@ -129,6 +168,12 @@ static int __devinit tegra_sdhci_probe(struct platform_device *pdev)
if (rc)
goto err_remove_host;
} else if (plat->mmc_data.register_status_notify) {
plat->mmc_data.register_status_notify(sdhci_status_notify_cb, sdhci);
}
if (plat->mmc_data.status) {
sdhci->card_present = host->plat->mmc_data.status(mmc_dev(sdhci->mmc));
}
if (plat->board_probe)

1
drivers/mmc/host/sdhci.h
View File

@@ -319,6 +319,7 @@ struct sdhci_host {
struct timer_list timer; /* Timer for timeouts */
unsigned int caps; /* Alternative capabilities */
unsigned int card_present; /* Previous card detect */
unsigned long private[0] ____cacheline_aligned;
};