mirror of https://gitee.com/openkylin/linux.git
mmc: host: s3cmci: allow probing from device tree
Allows configuring Samsung S3C24XX MMC/SD/SDIO controller using a device tree. Signed-off-by: Sergio Prado <sergio.prado@e-labworks.com> [Arnd: fix broken conditional expression] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Sergio Prado
Ulf Hansson
parent
d5cc7c80ba
commit
e584e07502
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@ -24,6 +24,10 @@
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/mmc/slot-gpio.h>
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#include <plat/gpio-cfg.h>
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#include <mach/dma.h>
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@ -807,21 +811,6 @@ static irqreturn_t s3cmci_irq(int irq, void *dev_id)
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}
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/*
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* ISR for the CardDetect Pin
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*/
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static irqreturn_t s3cmci_irq_cd(int irq, void *dev_id)
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{
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struct s3cmci_host *host = (struct s3cmci_host *)dev_id;
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dbg(host, dbg_irq, "card detect\n");
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mmc_detect_change(host->mmc, msecs_to_jiffies(500));
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return IRQ_HANDLED;
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}
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static void s3cmci_dma_done_callback(void *arg)
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{
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struct s3cmci_host *host = arg;
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@ -1177,19 +1166,6 @@ static void s3cmci_send_request(struct mmc_host *mmc)
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s3cmci_enable_irq(host, true);
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}
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static int s3cmci_card_present(struct mmc_host *mmc)
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{
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struct s3cmci_host *host = mmc_priv(mmc);
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struct s3c24xx_mci_pdata *pdata = host->pdata;
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int ret;
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if (pdata->no_detect)
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return -ENOSYS;
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ret = gpio_get_value(pdata->gpio_detect) ? 0 : 1;
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return ret ^ pdata->detect_invert;
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}
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static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
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{
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struct s3cmci_host *host = mmc_priv(mmc);
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@ -1198,7 +1174,7 @@ static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
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host->cmd_is_stop = 0;
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host->mrq = mrq;
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if (s3cmci_card_present(mmc) == 0) {
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if (mmc_gpio_get_cd(mmc) == 0) {
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dbg(host, dbg_err, "%s: no medium present\n", __func__);
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host->mrq->cmd->error = -ENOMEDIUM;
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mmc_request_done(mmc, mrq);
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@ -1242,8 +1218,9 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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case MMC_POWER_ON:
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case MMC_POWER_UP:
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/* Configure GPE5...GPE10 pins in SD mode */
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s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2),
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S3C_GPIO_PULL_NONE);
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if (!host->pdev->dev.of_node)
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s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2),
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S3C_GPIO_PULL_NONE);
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if (host->pdata->set_power)
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host->pdata->set_power(ios->power_mode, ios->vdd);
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@ -1255,7 +1232,8 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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case MMC_POWER_OFF:
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default:
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gpio_direction_output(S3C2410_GPE(5), 0);
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if (!host->pdev->dev.of_node)
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gpio_direction_output(S3C2410_GPE(5), 0);
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if (host->is2440)
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mci_con |= S3C2440_SDICON_SDRESET;
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@ -1295,21 +1273,6 @@ static void s3cmci_reset(struct s3cmci_host *host)
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writel(con, host->base + S3C2410_SDICON);
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}
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static int s3cmci_get_ro(struct mmc_host *mmc)
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{
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struct s3cmci_host *host = mmc_priv(mmc);
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struct s3c24xx_mci_pdata *pdata = host->pdata;
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int ret;
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if (pdata->no_wprotect)
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return 0;
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ret = gpio_get_value(pdata->gpio_wprotect) ? 1 : 0;
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ret ^= pdata->wprotect_invert;
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return ret;
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}
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static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable)
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{
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struct s3cmci_host *host = mmc_priv(mmc);
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@ -1353,8 +1316,8 @@ static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable)
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static struct mmc_host_ops s3cmci_ops = {
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.request = s3cmci_request,
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.set_ios = s3cmci_set_ios,
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.get_ro = s3cmci_get_ro,
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.get_cd = s3cmci_card_present,
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.get_ro = mmc_gpio_get_ro,
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.get_cd = mmc_gpio_get_cd,
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.enable_sdio_irq = s3cmci_enable_sdio_irq,
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};
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@ -1545,21 +1508,14 @@ static inline void s3cmci_debugfs_remove(struct s3cmci_host *host) { }
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#endif /* CONFIG_DEBUG_FS */
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static int s3cmci_probe(struct platform_device *pdev)
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static int s3cmci_probe_pdata(struct s3cmci_host *host)
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{
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struct s3cmci_host *host;
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struct mmc_host *mmc;
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int ret;
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int is2440;
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int i;
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struct platform_device *pdev = host->pdev;
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struct mmc_host *mmc = host->mmc;
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struct s3c24xx_mci_pdata *pdata;
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int i, ret;
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is2440 = platform_get_device_id(pdev)->driver_data;
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mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
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if (!mmc) {
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ret = -ENOMEM;
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goto probe_out;
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}
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host->is2440 = platform_get_device_id(pdev)->driver_data;
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for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) {
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ret = gpio_request(i, dev_name(&pdev->dev));
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@ -1569,25 +1525,101 @@ static int s3cmci_probe(struct platform_device *pdev)
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for (i--; i >= S3C2410_GPE(5); i--)
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gpio_free(i);
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goto probe_free_host;
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return ret;
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}
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}
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if (!pdev->dev.platform_data)
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pdev->dev.platform_data = &s3cmci_def_pdata;
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pdata = pdev->dev.platform_data;
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if (pdata->no_wprotect)
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mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
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if (pdata->no_detect)
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mmc->caps |= MMC_CAP_NEEDS_POLL;
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if (pdata->wprotect_invert)
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mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
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if (pdata->detect_invert)
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mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
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if (gpio_is_valid(pdata->gpio_detect)) {
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ret = mmc_gpio_request_cd(mmc, pdata->gpio_detect, 0);
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if (ret) {
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dev_err(&pdev->dev, "error requesting GPIO for CD %d\n",
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ret);
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return ret;
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}
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}
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if (gpio_is_valid(pdata->gpio_wprotect)) {
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ret = mmc_gpio_request_ro(mmc, pdata->gpio_wprotect);
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if (ret) {
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dev_err(&pdev->dev, "error requesting GPIO for WP %d\n",
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ret);
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return ret;
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}
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}
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return 0;
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}
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static int s3cmci_probe_dt(struct s3cmci_host *host)
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{
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struct platform_device *pdev = host->pdev;
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struct s3c24xx_mci_pdata *pdata;
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struct mmc_host *mmc = host->mmc;
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int ret;
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host->is2440 = (int) of_device_get_match_data(&pdev->dev);
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ret = mmc_of_parse(mmc);
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if (ret)
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return ret;
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pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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pdev->dev.platform_data = pdata;
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return 0;
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}
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static int s3cmci_probe(struct platform_device *pdev)
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{
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struct s3cmci_host *host;
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struct mmc_host *mmc;
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int ret;
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int i;
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mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
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if (!mmc) {
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ret = -ENOMEM;
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goto probe_out;
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}
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host = mmc_priv(mmc);
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host->mmc = mmc;
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host->pdev = pdev;
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host->is2440 = is2440;
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if (pdev->dev.of_node)
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ret = s3cmci_probe_dt(host);
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else
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ret = s3cmci_probe_pdata(host);
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if (ret)
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goto probe_free_host;
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host->pdata = pdev->dev.platform_data;
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if (!host->pdata) {
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pdev->dev.platform_data = &s3cmci_def_pdata;
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host->pdata = &s3cmci_def_pdata;
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}
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spin_lock_init(&host->complete_lock);
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tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host);
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if (is2440) {
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if (host->is2440) {
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host->sdiimsk = S3C2440_SDIIMSK;
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host->sdidata = S3C2440_SDIDATA;
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host->clk_div = 1;
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@ -1645,43 +1677,6 @@ static int s3cmci_probe(struct platform_device *pdev)
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disable_irq(host->irq);
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host->irq_state = false;
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if (!host->pdata->no_detect) {
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ret = gpio_request(host->pdata->gpio_detect, "s3cmci detect");
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if (ret) {
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dev_err(&pdev->dev, "failed to get detect gpio\n");
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goto probe_free_irq;
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}
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host->irq_cd = gpio_to_irq(host->pdata->gpio_detect);
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if (host->irq_cd >= 0) {
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if (request_irq(host->irq_cd, s3cmci_irq_cd,
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IRQF_TRIGGER_RISING |
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IRQF_TRIGGER_FALLING,
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DRIVER_NAME, host)) {
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dev_err(&pdev->dev,
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"can't get card detect irq.\n");
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ret = -ENOENT;
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goto probe_free_gpio_cd;
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}
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} else {
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dev_warn(&pdev->dev,
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"host detect has no irq available\n");
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gpio_direction_input(host->pdata->gpio_detect);
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}
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} else
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host->irq_cd = -1;
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if (!host->pdata->no_wprotect) {
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ret = gpio_request(host->pdata->gpio_wprotect, "s3cmci wp");
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if (ret) {
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dev_err(&pdev->dev, "failed to get writeprotect\n");
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goto probe_free_irq_cd;
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}
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gpio_direction_input(host->pdata->gpio_wprotect);
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}
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/* Depending on the dma state, get a DMA channel to use. */
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if (s3cmci_host_usedma(host)) {
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@ -1689,7 +1684,7 @@ static int s3cmci_probe(struct platform_device *pdev)
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ret = PTR_ERR_OR_ZERO(host->dma);
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if (ret) {
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dev_err(&pdev->dev, "cannot get DMA channel.\n");
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goto probe_free_gpio_wp;
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goto probe_free_irq;
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}
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}
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@ -1768,18 +1763,6 @@ static int s3cmci_probe(struct platform_device *pdev)
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if (s3cmci_host_usedma(host))
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dma_release_channel(host->dma);
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probe_free_gpio_wp:
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if (!host->pdata->no_wprotect)
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gpio_free(host->pdata->gpio_wprotect);
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probe_free_gpio_cd:
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if (!host->pdata->no_detect)
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gpio_free(host->pdata->gpio_detect);
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probe_free_irq_cd:
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if (host->irq_cd >= 0)
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free_irq(host->irq_cd, host);
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probe_free_irq:
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free_irq(host->irq, host);
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@ -1790,8 +1773,9 @@ static int s3cmci_probe(struct platform_device *pdev)
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release_mem_region(host->mem->start, resource_size(host->mem));
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probe_free_gpio:
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for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
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gpio_free(i);
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if (!pdev->dev.of_node)
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for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
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gpio_free(i);
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probe_free_host:
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mmc_free_host(mmc);
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@ -1818,7 +1802,6 @@ static int s3cmci_remove(struct platform_device *pdev)
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{
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struct mmc_host *mmc = platform_get_drvdata(pdev);
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struct s3cmci_host *host = mmc_priv(mmc);
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struct s3c24xx_mci_pdata *pd = host->pdata;
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int i;
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s3cmci_shutdown(pdev);
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@ -1832,15 +1815,9 @@ static int s3cmci_remove(struct platform_device *pdev)
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free_irq(host->irq, host);
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if (!pd->no_wprotect)
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gpio_free(pd->gpio_wprotect);
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if (!pd->no_detect)
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gpio_free(pd->gpio_detect);
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for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
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gpio_free(i);
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if (!pdev->dev.of_node)
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for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
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gpio_free(i);
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iounmap(host->base);
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release_mem_region(host->mem->start, resource_size(host->mem));
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@ -1849,6 +1826,23 @@ static int s3cmci_remove(struct platform_device *pdev)
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return 0;
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}
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static const struct of_device_id s3cmci_dt_match[] = {
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{
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.compatible = "samsung,s3c2410-sdi",
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.data = (void *)0,
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},
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{
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.compatible = "samsung,s3c2412-sdi",
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.data = (void *)1,
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},
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{
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.compatible = "samsung,s3c2440-sdi",
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.data = (void *)1,
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},
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, s3cmci_dt_match);
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static const struct platform_device_id s3cmci_driver_ids[] = {
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{
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.name = "s3c2410-sdi",
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@ -1868,6 +1862,7 @@ MODULE_DEVICE_TABLE(platform, s3cmci_driver_ids);
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static struct platform_driver s3cmci_driver = {
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.driver = {
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.name = "s3c-sdi",
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.of_match_table = s3cmci_dt_match,
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},
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.id_table = s3cmci_driver_ids,
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.probe = s3cmci_probe,
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