mmc: sdhci: make sdhci-pltfm device drivers self registered

The patch turns the common stuff in sdhci-pltfm.c into functions, and
add device drivers their own .probe and .remove which in turn call
into the common functions, so that those sdhci-pltfm device drivers
register itself and keep all device specific things away from common
sdhci-pltfm file.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 82 insertions, 31 deletions

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index a19967d0bfc4..e27ccbb5285b 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -191,16 +191,6 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 	return clk_get_rate(pltfm_host->clk) / 256 / 16;
 }
 
-static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
-{
-	struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
-
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
-		return gpio_get_value(boarddata->wp_gpio);
-	else
-		return -ENOSYS;
-}
-
 static struct sdhci_ops sdhci_esdhc_ops = {
 	.read_l = esdhc_readl_le,
 	.read_w = esdhc_readw_le,
@@ -212,6 +202,24 @@ static struct sdhci_ops sdhci_esdhc_ops = {
 	.get_min_clock = esdhc_pltfm_get_min_clock,
 };
 
+static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
+	.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_ADMA
+			| SDHCI_QUIRK_BROKEN_CARD_DETECTION,
+	/* ADMA has issues. Might be fixable */
+	.ops = &sdhci_esdhc_ops,
+};
+
+static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
+{
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
+
+	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
+		return gpio_get_value(boarddata->wp_gpio);
+	else
+		return -ENOSYS;
+}
+
 static irqreturn_t cd_irq(int irq, void *data)
 {
 	struct sdhci_host *sdhost = (struct sdhci_host *)data;
@@ -220,30 +228,35 @@ static irqreturn_t cd_irq(int irq, void *data)
 	return IRQ_HANDLED;
 };
 
-static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pdata)
+static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 {
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct sdhci_host *host;
+	struct esdhc_platform_data *boarddata;
 	struct clk *clk;
 	int err;
 	struct pltfm_imx_data *imx_data;
 
+	host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata);
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	pltfm_host = sdhci_priv(host);
+
+	imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
+	if (!imx_data)
+		return -ENOMEM;
+	pltfm_host->priv = imx_data;
+
 	clk = clk_get(mmc_dev(host->mmc), NULL);
 	if (IS_ERR(clk)) {
 		dev_err(mmc_dev(host->mmc), "clk err\n");
-		return PTR_ERR(clk);
+		err = PTR_ERR(clk);
+		goto err_clk_get;
 	}
 	clk_enable(clk);
 	pltfm_host->clk = clk;
 
-	imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
-	if (!imx_data) {
-		clk_disable(pltfm_host->clk);
-		clk_put(pltfm_host->clk);
-		return -ENOMEM;
-	}
-	pltfm_host->priv = imx_data;
-
 	if (!cpu_is_mx25())
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
@@ -257,6 +270,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
 		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
 
+	boarddata = host->mmc->parent->platform_data;
 	if (boarddata) {
 		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
 		if (err) {
@@ -289,6 +303,10 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
 	}
 
+	err = sdhci_add_host(host);
+	if (err)
+		goto err_add_host;
+
 	return 0;
 
  no_card_detect_irq:
@@ -297,14 +315,23 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 	boarddata->cd_gpio = err;
  not_supported:
 	kfree(imx_data);
-	return 0;
+ err_add_host:
+	clk_disable(pltfm_host->clk);
+	clk_put(pltfm_host->clk);
+ err_clk_get:
+	sdhci_pltfm_free(pdev);
+	return err;
 }
 
-static void esdhc_pltfm_exit(struct sdhci_host *host)
+static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 {
+	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
 	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
+
+	sdhci_remove_host(host, dead);
 
 	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
 		gpio_free(boarddata->wp_gpio);
@@ -319,13 +346,37 @@ static void esdhc_pltfm_exit(struct sdhci_host *host)
 	clk_disable(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
 	kfree(imx_data);
+
+	sdhci_pltfm_free(pdev);
+
+	return 0;
 }
 
-struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
-	.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_ADMA
-			| SDHCI_QUIRK_BROKEN_CARD_DETECTION,
-	/* ADMA has issues. Might be fixable */
-	.ops = &sdhci_esdhc_ops,
-	.init = esdhc_pltfm_init,
-	.exit = esdhc_pltfm_exit,
+static struct platform_driver sdhci_esdhc_imx_driver = {
+	.driver		= {
+		.name	= "sdhci-esdhc-imx",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= sdhci_esdhc_imx_probe,
+	.remove		= __devexit_p(sdhci_esdhc_imx_remove),
+#ifdef CONFIG_PM
+	.suspend	= sdhci_pltfm_suspend,
+	.resume		= sdhci_pltfm_resume,
+#endif
 };
+
+static int __init sdhci_esdhc_imx_init(void)
+{
+	return platform_driver_register(&sdhci_esdhc_imx_driver);
+}
+module_init(sdhci_esdhc_imx_init);
+
+static void __exit sdhci_esdhc_imx_exit(void)
+{
+	platform_driver_unregister(&sdhci_esdhc_imx_driver);
+}
+module_exit(sdhci_esdhc_imx_exit);
+
+MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
+MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
+MODULE_LICENSE("GPL v2");