1 files changed, 239 insertions, 53 deletions

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index cc701236d16..91058dabd11 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -21,86 +21,197 @@
 #include <linux/kernel.h>
 #include <linux/clk.h>
 #include <linux/slab.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/sh_mobile_sdhi.h>
 #include <linux/mfd/tmio.h>
 #include <linux/sh_dma.h>
+#include <linux/delay.h>
 
 #include "tmio_mmc.h"
 
+#define EXT_ACC           0xe4
+
+struct sh_mobile_sdhi_of_data {
+	unsigned long tmio_flags;
+	unsigned long capabilities;
+	unsigned long capabilities2;
+};
+
+static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
+	{
+		.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
+	},
+};
+
+static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+};
+
+static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+	.capabilities2	= MMC_CAP2_NO_MULTI_READ,
+};
+
+static const struct of_device_id sh_mobile_sdhi_of_match[] = {
+	{ .compatible = "renesas,sdhi-shmobile" },
+	{ .compatible = "renesas,sdhi-sh7372" },
+	{ .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
+	{ .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
+	{ .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
+	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
+
 struct sh_mobile_sdhi {
 	struct clk *clk;
 	struct tmio_mmc_data mmc_data;
-	struct sh_dmae_slave param_tx;
-	struct sh_dmae_slave param_rx;
 	struct tmio_mmc_dma dma_priv;
 };
 
-static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
+static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
 {
-	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+	struct mmc_host *mmc = platform_get_drvdata(pdev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+	int ret = clk_prepare_enable(priv->clk);
+	if (ret < 0)
+		return ret;
 
-	if (p && p->set_pwr)
-		p->set_pwr(pdev, state);
+	*f = clk_get_rate(priv->clk);
+	return 0;
 }
 
-static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
+static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
 {
-	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+	struct mmc_host *mmc = platform_get_drvdata(pdev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+	clk_disable_unprepare(priv->clk);
+}
+
+static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
+{
+	int timeout = 1000;
+
+	while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
+		udelay(1);
+
+	if (!timeout) {
+		dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
+{
+	switch (addr)
+	{
+	case CTL_SD_CMD:
+	case CTL_STOP_INTERNAL_ACTION:
+	case CTL_XFER_BLK_COUNT:
+	case CTL_SD_CARD_CLK_CTL:
+	case CTL_SD_XFER_LEN:
+	case CTL_SD_MEM_CARD_OPT:
+	case CTL_TRANSACTION_CTL:
+	case CTL_DMA_ENABLE:
+		return sh_mobile_sdhi_wait_idle(host);
+	}
+
+	return 0;
+}
 
-	if (p && p->get_cd)
-		return p->get_cd(pdev);
-	else
-		return -ENOSYS;
+static void sh_mobile_sdhi_cd_wakeup(const struct platform_device *pdev)
+{
+	mmc_detect_change(platform_get_drvdata(pdev), msecs_to_jiffies(100));
 }
 
-static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
+static const struct sh_mobile_sdhi_ops sdhi_ops = {
+	.cd_wakeup = sh_mobile_sdhi_cd_wakeup,
+};
+
+static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *of_id =
+		of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
 	struct sh_mobile_sdhi *priv;
 	struct tmio_mmc_data *mmc_data;
 	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
 	struct tmio_mmc_host *host;
-	char clk_name[8];
-	int ret;
+	struct resource *res;
+	int irq, ret, i = 0;
+	bool multiplexed_isr = true;
+	struct tmio_mmc_dma *dma_priv;
+	u16 ver;
 
-	priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
 	if (priv == NULL) {
 		dev_err(&pdev->dev, "kzalloc failed\n");
 		return -ENOMEM;
 	}
 
 	mmc_data = &priv->mmc_data;
+	dma_priv = &priv->dma_priv;
+
+	if (p) {
+		if (p->init) {
+			ret = p->init(pdev, &sdhi_ops);
+			if (ret)
+				return ret;
+		}
+	}
 
-	snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
-	priv->clk = clk_get(&pdev->dev, clk_name);
+	priv->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(priv->clk)) {
-		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
 		ret = PTR_ERR(priv->clk);
+		dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
 		goto eclkget;
 	}
 
-	clk_enable(priv->clk);
-
-	mmc_data->hclk = clk_get_rate(priv->clk);
-	mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
-	mmc_data->get_cd = sh_mobile_sdhi_get_cd;
+	mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
+	mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
 	mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
+	mmc_data->write16_hook = sh_mobile_sdhi_write16_hook;
 	if (p) {
 		mmc_data->flags = p->tmio_flags;
 		mmc_data->ocr_mask = p->tmio_ocr_mask;
 		mmc_data->capabilities |= p->tmio_caps;
+		mmc_data->capabilities2 |= p->tmio_caps2;
+		mmc_data->cd_gpio = p->cd_gpio;
 
-		if (p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
-			priv->param_tx.slave_id = p->dma_slave_tx;
-			priv->param_rx.slave_id = p->dma_slave_rx;
-			priv->dma_priv.chan_priv_tx = &priv->param_tx;
-			priv->dma_priv.chan_priv_rx = &priv->param_rx;
-			priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
-			mmc_data->dma = &priv->dma_priv;
+		if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
+			/*
+			 * Yes, we have to provide slave IDs twice to TMIO:
+			 * once as a filter parameter and once for channel
+			 * configuration as an explicit slave ID
+			 */
+			dma_priv->chan_priv_tx = (void *)p->dma_slave_tx;
+			dma_priv->chan_priv_rx = (void *)p->dma_slave_rx;
+			dma_priv->slave_id_tx = p->dma_slave_tx;
+			dma_priv->slave_id_rx = p->dma_slave_rx;
 		}
 	}
 
+	dma_priv->alignment_shift = 1; /* 2-byte alignment */
+	dma_priv->filter = shdma_chan_filter;
+
+	mmc_data->dma = dma_priv;
+
 	/*
 	 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
 	 * bus width mode.
@@ -112,20 +223,97 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
 	 */
 	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
 
+	if (of_id && of_id->data) {
+		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
+		mmc_data->flags |= of_data->tmio_flags;
+		mmc_data->capabilities |= of_data->capabilities;
+		mmc_data->capabilities2 |= of_data->capabilities2;
+	}
+
+	/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
+	mmc_data->bus_shift = resource_size(res) >> 9;
+
 	ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
 	if (ret < 0)
 		goto eprobe;
 
-	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
-		(unsigned long)host->ctl, host->irq);
+	/*
+	 * FIXME:
+	 * this Workaround can be more clever method
+	 */
+	ver = sd_ctrl_read16(host, CTL_VERSION);
+	if (ver == 0xCB0D)
+		sd_ctrl_write16(host, EXT_ACC, 1);
+
+	/*
+	 * Allow one or more specific (named) ISRs or
+	 * one or more multiplexed (un-named) ISRs.
+	 */
+
+	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
+	if (irq >= 0) {
+		multiplexed_isr = false;
+		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
+				  dev_name(&pdev->dev), host);
+		if (ret)
+			goto eirq;
+	}
+
+	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
+	if (irq >= 0) {
+		multiplexed_isr = false;
+		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
+				  dev_name(&pdev->dev), host);
+		if (ret)
+			goto eirq;
+	}
+
+	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
+	if (irq >= 0) {
+		multiplexed_isr = false;
+		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
+				  dev_name(&pdev->dev), host);
+		if (ret)
+			goto eirq;
+	} else if (!multiplexed_isr) {
+		dev_err(&pdev->dev,
+			"Principal SD-card IRQ is missing among named interrupts\n");
+		ret = irq;
+		goto eirq;
+	}
+
+	if (multiplexed_isr) {
+		while (1) {
+			irq = platform_get_irq(pdev, i);
+			if (irq < 0)
+				break;
+			i++;
+			ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
+					  dev_name(&pdev->dev), host);
+			if (ret)
+				goto eirq;
+		}
+
+		/* There must be at least one IRQ source */
+		if (!i) {
+			ret = irq;
+			goto eirq;
+		}
+	}
+
+	dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
+		 mmc_hostname(host->mmc), (unsigned long)
+		 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
+		 host->mmc->f_max / 1000000);
 
 	return ret;
 
+eirq:
+	tmio_mmc_host_remove(host);
 eprobe:
-	clk_disable(priv->clk);
-	clk_put(priv->clk);
 eclkget:
-	kfree(priv);
+	if (p && p->cleanup)
+		p->cleanup(pdev);
 	return ret;
 }
 
@@ -133,37 +321,35 @@ static int sh_mobile_sdhi_remove(struct platform_device *pdev)
 {
 	struct mmc_host *mmc = platform_get_drvdata(pdev);
 	struct tmio_mmc_host *host = mmc_priv(mmc);
-	struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
 
 	tmio_mmc_host_remove(host);
-	clk_disable(priv->clk);
-	clk_put(priv->clk);
-	kfree(priv);
+
+	if (p && p->cleanup)
+		p->cleanup(pdev);
 
 	return 0;
 }
 
+static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_host_suspend, tmio_mmc_host_resume)
+	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
+			tmio_mmc_host_runtime_resume,
+			NULL)
+};
+
 static struct platform_driver sh_mobile_sdhi_driver = {
 	.driver		= {
 		.name	= "sh_mobile_sdhi",
 		.owner	= THIS_MODULE,
+		.pm	= &tmio_mmc_dev_pm_ops,
+		.of_match_table = sh_mobile_sdhi_of_match,
 	},
 	.probe		= sh_mobile_sdhi_probe,
-	.remove		= __devexit_p(sh_mobile_sdhi_remove),
+	.remove		= sh_mobile_sdhi_remove,
 };
 
-static int __init sh_mobile_sdhi_init(void)
-{
-	return platform_driver_register(&sh_mobile_sdhi_driver);
-}
-
-static void __exit sh_mobile_sdhi_exit(void)
-{
-	platform_driver_unregister(&sh_mobile_sdhi_driver);
-}
-
-module_init(sh_mobile_sdhi_init);
-module_exit(sh_mobile_sdhi_exit);
+module_platform_driver(sh_mobile_sdhi_driver);
 
 MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
 MODULE_AUTHOR("Magnus Damm");