diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-dove.c | 73 |
1 files changed, 67 insertions, 6 deletions
diff --git a/drivers/mmc/host/sdhci-dove.c b/drivers/mmc/host/sdhci-dove.c index 4af64f32c6d1..e6214480bc98 100644 --- a/drivers/mmc/host/sdhci-dove.c +++ b/drivers/mmc/host/sdhci-dove.c @@ -19,20 +19,30 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include <linux/err.h> -#include <linux/io.h> #include <linux/clk.h> #include <linux/err.h> -#include <linux/module.h> +#include <linux/gpio.h> +#include <linux/io.h> #include <linux/mmc/host.h> +#include <linux/module.h> #include <linux/of.h> +#include <linux/of_gpio.h> #include "sdhci-pltfm.h" struct sdhci_dove_priv { struct clk *clk; + int gpio_cd; }; +static irqreturn_t sdhci_dove_carddetect_irq(int irq, void *data) +{ + struct sdhci_host *host = data; + + tasklet_schedule(&host->card_tasklet); + return IRQ_HANDLED; +} + static u16 sdhci_dove_readw(struct sdhci_host *host, int reg) { u16 ret; @@ -50,16 +60,25 @@ static u16 sdhci_dove_readw(struct sdhci_host *host, int reg) static u32 sdhci_dove_readl(struct sdhci_host *host, int reg) { + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_dove_priv *priv = pltfm_host->priv; u32 ret; + ret = readl(host->ioaddr + reg); + switch (reg) { case SDHCI_CAPABILITIES: - ret = readl(host->ioaddr + reg); /* Mask the support for 3.0V */ ret &= ~SDHCI_CAN_VDD_300; break; - default: - ret = readl(host->ioaddr + reg); + case SDHCI_PRESENT_STATE: + if (gpio_is_valid(priv->gpio_cd)) { + if (gpio_get_value(priv->gpio_cd) == 0) + ret |= SDHCI_CARD_PRESENT; + else + ret &= ~SDHCI_CARD_PRESENT; + } + break; } return ret; } @@ -94,6 +113,23 @@ static int __devinit sdhci_dove_probe(struct platform_device *pdev) priv->clk = devm_clk_get(&pdev->dev, NULL); + if (pdev->dev.of_node) { + priv->gpio_cd = of_get_named_gpio(pdev->dev.of_node, + "cd-gpios", 0); + } else { + priv->gpio_cd = -EINVAL; + } + + if (gpio_is_valid(priv->gpio_cd)) { + ret = gpio_request(priv->gpio_cd, "sdhci-cd"); + if (ret) { + dev_err(&pdev->dev, "card detect gpio request failed: %d\n", + ret); + return ret; + } + gpio_direction_input(priv->gpio_cd); + } + host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata); if (IS_ERR(host)) { ret = PTR_ERR(host); @@ -112,13 +148,33 @@ static int __devinit sdhci_dove_probe(struct platform_device *pdev) if (ret) goto err_sdhci_add; + /* + * We must request the IRQ after sdhci_add_host(), as the tasklet only + * gets setup in sdhci_add_host() and we oops. + */ + if (gpio_is_valid(priv->gpio_cd)) { + ret = request_irq(gpio_to_irq(priv->gpio_cd), + sdhci_dove_carddetect_irq, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, + mmc_hostname(host->mmc), host); + if (ret) { + dev_err(&pdev->dev, "card detect irq request failed: %d\n", + ret); + goto err_request_irq; + } + } + return 0; +err_request_irq: + sdhci_remove_host(host, 0); err_sdhci_add: if (!IS_ERR(priv->clk)) clk_disable_unprepare(priv->clk); sdhci_pltfm_free(pdev); err_sdhci_pltfm_init: + if (gpio_is_valid(priv->gpio_cd)) + gpio_free(priv->gpio_cd); return ret; } @@ -130,6 +186,11 @@ static int __devexit sdhci_dove_remove(struct platform_device *pdev) sdhci_pltfm_unregister(pdev); + if (gpio_is_valid(priv->gpio_cd)) { + free_irq(gpio_to_irq(priv->gpio_cd), host); + gpio_free(priv->gpio_cd); + } + if (!IS_ERR(priv->clk)) clk_disable_unprepare(priv->clk); |