static void tegra_sdhci_status_notify_cb(int card_present, void *dev_id)
{
struct sdhci_host *sdhci = (struct sdhci_host *)dev_id;
pr_debug("%s: card_present %d\n",
mmc_hostname(sdhci->mmc), card_present);
sdhci_card_detect_callback(sdhci);
}
void sdhci_tegra_card_detect(unsigned long data)
{
struct mmc_host *mmc = (struct mmc_host *)data;
struct sdhci_host *sdhost = mmc_priv(mmc);
struct tegra_sdhci *host = sdhci_priv(sdhost);
if(host->gpio_cd != -1) {
int cur_status = (gpio_get_value(host->gpio_cd)==host->gpio_polarity_cd);
if(cur_status != host->card_present) { /* Card is attached, but card_present indicates un-plug */
printk("mchi : original status : %s, but now : %s =============\n",
host->card_present?"plug-in":"un-plug",
cur_status?"plug-in":"un-plug");
host->card_present = (gpio_get_value(host->gpio_cd)==host->gpio_polarity_cd);
if(host->gpio_en!=-1)
{
gpio_set_value(host->gpio_en,host->card_present?host->gpio_polarity_en:!host->gpio_polarity_en);
}
smp_wmb();
sdhci_card_detect_callback(sdhost);
}
/* Ok, enable the interrupt */
atomic_set(&detect_lock, 0);
}
printk("\n");
}
static irqreturn_t carddetect_irq(int irq, void *data)
{
struct sdhci_host *sdhost = (struct sdhci_host *)data;
sdhci_card_detect_callback(sdhost);
return IRQ_HANDLED;
};
static irqreturn_t card_detect_isr(int irq, void *dev_id)
{
struct sdhci_host *sdhost = dev_id;
struct tegra_sdhci *host = sdhci_priv(sdhost);
#ifdef MMC_PATCH_1
if(atomic_add_return(1, &detect_lock) != 1) {
return IRQ_HANDLED; /* indicates the last attach/detach does not finish */
}
#endif
host->card_present =
(gpio_get_value(host->gpio_cd)==host->gpio_polarity_cd);
if(host->gpio_en!=-1)
{
gpio_set_value(host->gpio_en,host->card_present?host->gpio_polarity_en:!host->gpio_polarity_en);
}
smp_wmb();
sdhci_card_detect_callback(sdhost);
return IRQ_HANDLED;
}