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Message-Id: <1300694823-8300-5-git-send-email-shawn.guo@linaro.org>
Date: Mon, 21 Mar 2011 16:07:02 +0800
From: Shawn Guo <shawn.guo@...aro.org>
To: devicetree-discuss@...ts.ozlabs.org, linux-mmc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
patches@...aro.org, sameo@...ux.intel.com,
grant.likely@...retlab.ca, Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH 4/5] mmc: sdhci: make sdhci-tegra driver self registered
The patch adds sdhci-tegra its own .probe and .remove which in turn
call into the common functions provided by sdhci-pltfm.c, so that
sdhci-tegra driver registers itself and keep all sdhci-tegra specific
things like sdhci_tegra_pdata away from sdhci-pltfm.c which is common.
As sdhci-tegra is the last one remaining in sdhci-pltfm.c, with
removing it out, the .probe and .remove in sdhci-pltfm.c together with
other things like sdhci_dt_ids and sdhci_pltfm_ids can be cleaned up
as well.
Also, having sdhci-tegra handle its own driver registration, the dt
and non-dt support of sdhci-tegra can be consolidated into one pair
of .probe and .remove hooks now.
Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
---
drivers/mmc/host/sdhci-pltfm.c | 213 +---------------------------------------
drivers/mmc/host/sdhci-pltfm.h | 3 -
drivers/mmc/host/sdhci-tegra.c | 189 +++++++++++++++++++++---------------
3 files changed, 112 insertions(+), 293 deletions(-)
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index c4bba33..c300234 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -22,25 +22,11 @@
* Inspired by sdhci-pci.c, by Pierre Ossman
*/
-#include <linux/delay.h>
-#include <linux/highmem.h>
-#include <linux/mod_devicetable.h>
-#include <linux/platform_device.h>
-
-#include <linux/mmc/host.h>
-
-#include <linux/io.h>
-#include <linux/mmc/sdhci-pltfm.h>
+#include <linux/err.h>
#include "sdhci.h"
#include "sdhci-pltfm.h"
-/*****************************************************************************\
- * *
- * SDHCI core callbacks *
- * *
-\*****************************************************************************/
-
static struct sdhci_ops sdhci_pltfm_ops = {
};
@@ -121,164 +107,6 @@ void sdhci_pltfm_free(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
}
-/*****************************************************************************\
- * *
- * Device probing/removal *
- * *
-\*****************************************************************************/
-#if defined(CONFIG_OF)
-#include <linux/of_device.h>
-static const struct of_device_id sdhci_dt_ids[] = {
- { .compatible = "nvidia,tegra250-sdhci", .data = &sdhci_tegra_dt_pdata },
- { }
-};
-MODULE_DEVICE_TABLE(platform, sdhci_dt_ids);
-
-static const struct of_device_id *sdhci_get_of_device_id(struct platform_device *pdev)
-{
- return of_match_device(sdhci_dt_ids, &pdev->dev);
-}
-#else
-#define shdci_dt_ids NULL
-static inline struct of_device_id *sdhci_get_of_device_id(struct platform_device *pdev)
-{
- return NULL;
-}
-#endif
-
-static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
-{
- const struct platform_device_id *platid = platform_get_device_id(pdev);
- const struct of_device_id *dtid = sdhci_get_of_device_id(pdev);
- struct sdhci_pltfm_data *pdata;
- struct sdhci_host *host;
- struct sdhci_pltfm_host *pltfm_host;
- struct resource *iomem;
- int ret;
-
- if (platid && platid->driver_data)
- pdata = (void *)platid->driver_data;
- else if (dtid && dtid->data)
- pdata = dtid->data;
- else
- pdata = pdev->dev.platform_data;
-
- iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!iomem) {
- ret = -ENOMEM;
- goto err;
- }
-
- if (resource_size(iomem) < 0x100)
- dev_err(&pdev->dev, "Invalid iomem size. You may "
- "experience problems.\n");
-
- /* Some PCI-based MFD need the parent here */
- if (pdev->dev.parent != &platform_bus)
- host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
- else
- host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
-
- if (IS_ERR(host)) {
- ret = PTR_ERR(host);
- goto err;
- }
-
- pltfm_host = sdhci_priv(host);
-
- host->hw_name = "platform";
- if (pdata && pdata->ops)
- host->ops = pdata->ops;
- else
- host->ops = &sdhci_pltfm_ops;
- if (pdata)
- host->quirks = pdata->quirks;
- host->irq = platform_get_irq(pdev, 0);
-
- if (!request_mem_region(iomem->start, resource_size(iomem),
- mmc_hostname(host->mmc))) {
- dev_err(&pdev->dev, "cannot request region\n");
- ret = -EBUSY;
- goto err_request;
- }
-
- host->ioaddr = ioremap(iomem->start, resource_size(iomem));
- if (!host->ioaddr) {
- dev_err(&pdev->dev, "failed to remap registers\n");
- ret = -ENOMEM;
- goto err_remap;
- }
-
- if (pdata && pdata->init) {
- ret = pdata->init(host, pdata);
- if (ret)
- goto err_plat_init;
- }
-
- ret = sdhci_add_host(host);
- if (ret)
- goto err_add_host;
-
- platform_set_drvdata(pdev, host);
-
- return 0;
-
-err_add_host:
- if (pdata && pdata->exit)
- pdata->exit(host);
-err_plat_init:
- iounmap(host->ioaddr);
-err_remap:
- release_mem_region(iomem->start, resource_size(iomem));
-err_request:
- sdhci_free_host(host);
-err:
- printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
- return ret;
-}
-
-static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
-{
- const struct platform_device_id *platid = platform_get_device_id(pdev);
- const struct of_device_id *dtid = sdhci_get_of_device_id(pdev);
- struct sdhci_pltfm_data *pdata;
- struct sdhci_host *host = platform_get_drvdata(pdev);
- struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- int dead;
- u32 scratch;
-
- if (platid && platid->driver_data)
- pdata = (void *)platid->driver_data;
- else if (dtid && dtid->data)
- pdata = dtid->data;
- else
- pdata = pdev->dev.platform_data;
-
- dead = 0;
- scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
- if (scratch == (u32)-1)
- dead = 1;
-
- sdhci_remove_host(host, dead);
- if (pdata && pdata->exit)
- pdata->exit(host);
- iounmap(host->ioaddr);
- release_mem_region(iomem->start, resource_size(iomem));
- sdhci_free_host(host);
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct platform_device_id sdhci_pltfm_ids[] = {
- { "sdhci", },
-#ifdef CONFIG_MMC_SDHCI_TEGRA
- { "sdhci-tegra", (kernel_ulong_t)&sdhci_tegra_pdata },
-#endif
- { },
-};
-MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);
-
#ifdef CONFIG_PM
int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
{
@@ -293,43 +121,4 @@ int sdhci_pltfm_resume(struct platform_device *dev)
return sdhci_resume_host(host);
}
-#else
-#define sdhci_pltfm_suspend NULL
-#define sdhci_pltfm_resume NULL
#endif /* CONFIG_PM */
-
-static struct platform_driver sdhci_pltfm_driver = {
- .driver = {
- .name = "sdhci",
- .owner = THIS_MODULE,
- .of_match_table = sdhci_dt_ids,
- },
- .probe = sdhci_pltfm_probe,
- .remove = __devexit_p(sdhci_pltfm_remove),
- .id_table = sdhci_pltfm_ids,
- .suspend = sdhci_pltfm_suspend,
- .resume = sdhci_pltfm_resume,
-};
-
-/*****************************************************************************\
- * *
- * Driver init/exit *
- * *
-\*****************************************************************************/
-
-static int __init sdhci_drv_init(void)
-{
- return platform_driver_register(&sdhci_pltfm_driver);
-}
-
-static void __exit sdhci_drv_exit(void)
-{
- platform_driver_unregister(&sdhci_pltfm_driver);
-}
-
-module_init(sdhci_drv_init);
-module_exit(sdhci_drv_exit);
-
-MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
-MODULE_AUTHOR("Mocean Laboratories <info@...ean-labs.com>");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h
index d7267f0..b53b976 100644
--- a/drivers/mmc/host/sdhci-pltfm.h
+++ b/drivers/mmc/host/sdhci-pltfm.h
@@ -21,9 +21,6 @@ struct sdhci_pltfm_host {
u32 scratchpad; /* to handle quirks across io-accessor calls */
};
-extern struct sdhci_pltfm_data sdhci_tegra_pdata;
-extern struct sdhci_pltfm_data sdhci_tegra_dt_pdata;
-
struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
struct sdhci_pltfm_data *pdata);
void sdhci_pltfm_free(struct platform_device *pdev);
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index c3d6f83..c376e74 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -119,19 +119,58 @@ static int tegra_sdhci_8bit(struct sdhci_host *host, int bus_width)
}
-static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
- struct sdhci_pltfm_data *pdata)
+static struct sdhci_ops tegra_sdhci_ops = {
+ .get_ro = tegra_sdhci_get_ro,
+ .read_l = tegra_sdhci_readl,
+ .read_w = tegra_sdhci_readw,
+ .write_l = tegra_sdhci_writel,
+ .platform_8bit_width = tegra_sdhci_8bit,
+};
+
+static struct sdhci_pltfm_data sdhci_tegra_pdata = {
+ .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
+ SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_NO_HISPD_BIT |
+ SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
+ .ops = &tegra_sdhci_ops,
+};
+
+static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc));
+ struct sdhci_pltfm_host *pltfm_host;
struct tegra_sdhci_platform_data *plat;
+ struct sdhci_host *host;
struct clk *clk;
int rc;
+ host = sdhci_pltfm_init(pdev, &sdhci_tegra_pdata);
+ if (!host)
+ return -ENOMEM;
+
+ pltfm_host = sdhci_priv(host);
+
plat = pdev->dev.platform_data;
+
+#ifdef CONFIG_OF
+ plat = kzalloc(sizeof(*plat), GFP_KERNEL);
+ if (!plat) {
+ rc = -ENOMEM;
+ goto err_no_plat;
+ }
+ pdev->dev.platform_data = plat;
+
+ plat->cd_gpio = of_get_gpio(pdev->dev.of_node, 0);
+ plat->wp_gpio = of_get_gpio(pdev->dev.of_node, 1);
+ plat->power_gpio = of_get_gpio(pdev->dev.of_node, 2);
+
+ dev_info(&pdev->dev, "using gpios cd=%i, wp=%i power=%i\n",
+ plat->cd_gpio, plat->wp_gpio, plat->power_gpio);
+#endif
+
if (plat == NULL) {
dev_err(mmc_dev(host->mmc), "missing platform data\n");
- return -ENXIO;
+ rc = -ENXIO;
+ goto err_no_plat;
}
if (gpio_is_valid(plat->power_gpio)) {
@@ -139,7 +178,7 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
if (rc) {
dev_err(mmc_dev(host->mmc),
"failed to allocate power gpio\n");
- goto out;
+ goto err_power_req;
}
tegra_gpio_enable(plat->power_gpio);
gpio_direction_output(plat->power_gpio, 1);
@@ -150,7 +189,7 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
if (rc) {
dev_err(mmc_dev(host->mmc),
"failed to allocate cd gpio\n");
- goto out_power;
+ goto err_cd_req;
}
tegra_gpio_enable(plat->cd_gpio);
gpio_direction_input(plat->cd_gpio);
@@ -161,7 +200,7 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
if (rc) {
dev_err(mmc_dev(host->mmc), "request irq error\n");
- goto out_cd;
+ goto err_cd_irq_req;
}
}
@@ -171,7 +210,7 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
if (rc) {
dev_err(mmc_dev(host->mmc),
"failed to allocate wp gpio\n");
- goto out_cd;
+ goto err_wp_req;
}
tegra_gpio_enable(plat->wp_gpio);
gpio_direction_input(plat->wp_gpio);
@@ -181,7 +220,7 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
if (IS_ERR(clk)) {
dev_err(mmc_dev(host->mmc), "clk err\n");
rc = PTR_ERR(clk);
- goto out_wp;
+ goto err_clk_get;
}
clk_enable(clk);
pltfm_host->clk = clk;
@@ -189,62 +228,55 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
if (plat->is_8bit)
host->mmc->caps |= MMC_CAP_8_BIT_DATA;
+ rc = sdhci_add_host(host);
+ if (rc)
+ goto err_add_host;
+
return 0;
-out_wp:
+err_add_host:
+ clk_disable(pltfm_host->clk);
+ clk_put(pltfm_host->clk);
+err_clk_get:
if (gpio_is_valid(plat->wp_gpio)) {
tegra_gpio_disable(plat->wp_gpio);
gpio_free(plat->wp_gpio);
}
-
-out_cd:
+err_wp_req:
+ if (gpio_is_valid(plat->cd_gpio)) {
+ free_irq(gpio_to_irq(plat->cd_gpio), host);
+ }
+err_cd_irq_req:
if (gpio_is_valid(plat->cd_gpio)) {
tegra_gpio_disable(plat->cd_gpio);
gpio_free(plat->cd_gpio);
}
-
-out_power:
+err_cd_req:
if (gpio_is_valid(plat->power_gpio)) {
tegra_gpio_disable(plat->power_gpio);
gpio_free(plat->power_gpio);
}
-
-out:
+err_power_req:
+#ifdef CONFIG_OF
+ kfree(plat);
+#endif
+err_no_plat:
+ sdhci_pltfm_free(pdev);
return rc;
}
-static int tegra_sdhci_pltfm_dt_init(struct sdhci_host *host,
- struct sdhci_pltfm_data *pdata)
-{
- struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc));
- struct tegra_sdhci_platform_data *plat;
-
- if (pdev->dev.platform_data) {
- dev_err(&pdev->dev, "%s: platform_data not NULL; aborting\n",
- __func__);
- return -ENODEV;
- }
-
- plat = kzalloc(sizeof(*plat), GFP_KERNEL);
- if (!plat)
- return -ENOMEM;
- pdev->dev.platform_data = plat;
-
- plat->cd_gpio = of_get_gpio(pdev->dev.of_node, 0);
- plat->wp_gpio = of_get_gpio(pdev->dev.of_node, 1);
- plat->power_gpio = of_get_gpio(pdev->dev.of_node, 2);
-
- dev_info(&pdev->dev, "using gpios cd=%i, wp=%i power=%i\n",
- plat->cd_gpio, plat->wp_gpio, plat->power_gpio);
-
- return tegra_sdhci_pltfm_init(host, pdata);
-}
-
-static void tegra_sdhci_pltfm_exit(struct sdhci_host *host)
+static int __devexit sdhci_tegra_remove(struct platform_device *pdev)
{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc));
struct tegra_sdhci_platform_data *plat;
+ int dead = 0;
+ u32 scratch;
+
+ scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
+ if (scratch == (u32)-1)
+ dead = 1;
+ sdhci_remove_host(host, dead);
plat = pdev->dev.platform_data;
@@ -263,44 +295,45 @@ static void tegra_sdhci_pltfm_exit(struct sdhci_host *host)
gpio_free(plat->power_gpio);
}
+#ifdef CONFIG_OF
+ kfree(pdev->dev.platform_data);
+ pdev->dev.platform_data = NULL;
+#endif
+
clk_disable(pltfm_host->clk);
clk_put(pltfm_host->clk);
-}
-
-static void tegra_sdhci_pltfm_dt_exit(struct sdhci_host *host)
-{
- struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc));
- tegra_sdhci_pltfm_exit(host);
+ sdhci_pltfm_free(pdev);
- kfree(pdev->dev.platform_data);
- pdev->dev.platform_data = NULL;
+ return 0;
}
-static struct sdhci_ops tegra_sdhci_ops = {
- .get_ro = tegra_sdhci_get_ro,
- .read_l = tegra_sdhci_readl,
- .read_w = tegra_sdhci_readw,
- .write_l = tegra_sdhci_writel,
- .platform_8bit_width = tegra_sdhci_8bit,
+static struct platform_driver sdhci_tegra_driver = {
+ .driver = {
+ .name = "sdhci-tegra",
+ .owner = THIS_MODULE,
+ },
+ .probe = sdhci_tegra_probe,
+ .remove = __devexit_p(sdhci_tegra_remove),
+#ifdef CONFIG_PM
+ .suspend = sdhci_pltfm_suspend,
+ .resume = sdhci_pltfm_resume,
+#endif
};
-struct sdhci_pltfm_data sdhci_tegra_pdata = {
- .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
- SDHCI_QUIRK_SINGLE_POWER_WRITE |
- SDHCI_QUIRK_NO_HISPD_BIT |
- SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
- .ops = &tegra_sdhci_ops,
- .init = tegra_sdhci_pltfm_init,
- .exit = tegra_sdhci_pltfm_exit,
-};
+static int __init sdhci_tegra_init(void)
+{
+ return platform_driver_register(&sdhci_tegra_driver);
+}
-struct sdhci_pltfm_data sdhci_tegra_dt_pdata = {
- .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
- SDHCI_QUIRK_SINGLE_POWER_WRITE |
- SDHCI_QUIRK_NO_HISPD_BIT |
- SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
- .ops = &tegra_sdhci_ops,
- .init = tegra_sdhci_pltfm_dt_init,
- .exit = tegra_sdhci_pltfm_dt_exit,
-};
+static void __exit sdhci_tegra_exit(void)
+{
+ platform_driver_unregister(&sdhci_tegra_driver);
+}
+
+module_init(sdhci_tegra_init);
+module_exit(sdhci_tegra_exit);
+
+MODULE_DESCRIPTION("SDHCI driver for Tegra");
+MODULE_AUTHOR(" Google, Inc.");
+MODULE_LICENSE("GPL v2");
--
1.7.1
--
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