*
* Copyright 2007 Steven Brown <sbrown@cortland.com>
* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
+ * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
*
* Derived from the ohci-ssb driver
* Copyright 2007 Michael Buesch <m@bues.ch>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
+#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/reset.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ehci_pdriver.h>
#include "ehci.h"
#define DRIVER_DESC "EHCI generic platform driver"
+#define EHCI_MAX_CLKS 3
+#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
+
+struct ehci_platform_priv {
+ struct clk *clks[EHCI_MAX_CLKS];
+ struct reset_control *rst;
+ struct phy *phy;
+};
static const char hcd_name[] = "ehci-platform";
static int ehci_platform_reset(struct usb_hcd *hcd)
{
struct platform_device *pdev = to_platform_device(hcd->self.controller);
- struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
+ struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int retval;
hcd->has_tt = pdata->has_tt;
ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
- ehci->big_endian_desc = pdata->big_endian_desc;
- ehci->big_endian_mmio = pdata->big_endian_mmio;
+
+ if (pdata->pre_setup) {
+ retval = pdata->pre_setup(hcd);
+ if (retval < 0)
+ return retval;
+ }
ehci->caps = hcd->regs + pdata->caps_offset;
retval = ehci_setup(hcd);
return 0;
}
+static int ehci_platform_power_on(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
+ int clk, ret;
+
+ for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
+ ret = clk_prepare_enable(priv->clks[clk]);
+ if (ret)
+ goto err_disable_clks;
+ }
+
+ if (priv->phy) {
+ ret = phy_init(priv->phy);
+ if (ret)
+ goto err_disable_clks;
+
+ ret = phy_power_on(priv->phy);
+ if (ret)
+ goto err_exit_phy;
+ }
+
+ return 0;
+
+err_exit_phy:
+ phy_exit(priv->phy);
+err_disable_clks:
+ while (--clk >= 0)
+ clk_disable_unprepare(priv->clks[clk]);
+
+ return ret;
+}
+
+static void ehci_platform_power_off(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
+ int clk;
+
+ if (priv->phy) {
+ phy_power_off(priv->phy);
+ phy_exit(priv->phy);
+ }
+
+ for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
+ if (priv->clks[clk])
+ clk_disable_unprepare(priv->clks[clk]);
+}
+
static struct hc_driver __read_mostly ehci_platform_hc_driver;
static const struct ehci_driver_overrides platform_overrides __initconst = {
- .reset = ehci_platform_reset,
+ .reset = ehci_platform_reset,
+ .extra_priv_size = sizeof(struct ehci_platform_priv),
};
-static struct usb_ehci_pdata ehci_platform_defaults;
+static struct usb_ehci_pdata ehci_platform_defaults = {
+ .power_on = ehci_platform_power_on,
+ .power_suspend = ehci_platform_power_off,
+ .power_off = ehci_platform_power_off,
+};
static int ehci_platform_probe(struct platform_device *dev)
{
struct usb_hcd *hcd;
struct resource *res_mem;
- struct usb_ehci_pdata *pdata;
- int irq;
- int err = -ENOMEM;
+ struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
+ struct ehci_platform_priv *priv;
+ struct ehci_hcd *ehci;
+ int err, irq, clk = 0;
if (usb_disabled())
return -ENODEV;
/*
- * use reasonable defaults so platforms don't have to provide these.
- * with DT probing on ARM, none of these are set.
+ * Use reasonable defaults so platforms don't have to provide these
+ * with DT probing on ARM.
*/
- if (!dev->dev.platform_data)
- dev->dev.platform_data = &ehci_platform_defaults;
- if (!dev->dev.dma_mask)
- dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
- if (!dev->dev.coherent_dma_mask)
- dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ if (!pdata)
+ pdata = &ehci_platform_defaults;
- pdata = dev->dev.platform_data;
+ err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
irq = platform_get_irq(dev, 0);
if (irq < 0) {
dev_err(&dev->dev, "no irq provided");
return irq;
}
- res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!res_mem) {
- dev_err(&dev->dev, "no memory resource provided");
- return -ENXIO;
+
+ hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
+ dev_name(&dev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ platform_set_drvdata(dev, hcd);
+ dev->dev.platform_data = pdata;
+ priv = hcd_to_ehci_priv(hcd);
+ ehci = hcd_to_ehci(hcd);
+
+ if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
+ if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
+ ehci->big_endian_mmio = 1;
+
+ if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
+ ehci->big_endian_desc = 1;
+
+ if (of_property_read_bool(dev->dev.of_node, "big-endian"))
+ ehci->big_endian_mmio = ehci->big_endian_desc = 1;
+
+ priv->phy = devm_phy_get(&dev->dev, "usb");
+ if (IS_ERR(priv->phy)) {
+ err = PTR_ERR(priv->phy);
+ if (err == -EPROBE_DEFER)
+ goto err_put_hcd;
+ priv->phy = NULL;
+ }
+
+ for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
+ priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
+ if (IS_ERR(priv->clks[clk])) {
+ err = PTR_ERR(priv->clks[clk]);
+ if (err == -EPROBE_DEFER)
+ goto err_put_clks;
+ priv->clks[clk] = NULL;
+ break;
+ }
+ }
}
+ priv->rst = devm_reset_control_get(&dev->dev, NULL);
+ if (IS_ERR(priv->rst)) {
+ err = PTR_ERR(priv->rst);
+ if (err == -EPROBE_DEFER)
+ goto err_put_clks;
+ priv->rst = NULL;
+ } else {
+ err = reset_control_deassert(priv->rst);
+ if (err)
+ goto err_put_clks;
+ }
+
+ if (pdata->big_endian_desc)
+ ehci->big_endian_desc = 1;
+ if (pdata->big_endian_mmio)
+ ehci->big_endian_mmio = 1;
+
+#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
+ if (ehci->big_endian_mmio) {
+ dev_err(&dev->dev,
+ "Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
+ err = -EINVAL;
+ goto err_reset;
+ }
+#endif
+#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
+ if (ehci->big_endian_desc) {
+ dev_err(&dev->dev,
+ "Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
+ err = -EINVAL;
+ goto err_reset;
+ }
+#endif
+
if (pdata->power_on) {
err = pdata->power_on(dev);
if (err < 0)
- return err;
+ goto err_reset;
}
- hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
- dev_name(&dev->dev));
- if (!hcd) {
- err = -ENOMEM;
+ res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
+ if (IS_ERR(hcd->regs)) {
+ err = PTR_ERR(hcd->regs);
goto err_power;
}
-
hcd->rsrc_start = res_mem->start;
hcd->rsrc_len = resource_size(res_mem);
- hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
- if (IS_ERR(hcd->regs)) {
- err = PTR_ERR(hcd->regs);
- goto err_put_hcd;
- }
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err)
- goto err_put_hcd;
+ goto err_power;
+ device_wakeup_enable(hcd->self.controller);
platform_set_drvdata(dev, hcd);
return err;
-err_put_hcd:
- usb_put_hcd(hcd);
err_power:
if (pdata->power_off)
pdata->power_off(dev);
+err_reset:
+ if (priv->rst)
+ reset_control_assert(priv->rst);
+err_put_clks:
+ while (--clk >= 0)
+ clk_put(priv->clks[clk]);
+err_put_hcd:
+ if (pdata == &ehci_platform_defaults)
+ dev->dev.platform_data = NULL;
+
+ usb_put_hcd(hcd);
return err;
}
static int ehci_platform_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
- struct usb_ehci_pdata *pdata = dev->dev.platform_data;
+ struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
+ struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
+ int clk;
usb_remove_hcd(hcd);
- usb_put_hcd(hcd);
- platform_set_drvdata(dev, NULL);
if (pdata->power_off)
pdata->power_off(dev);
+ if (priv->rst)
+ reset_control_assert(priv->rst);
+
+ for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
+ clk_put(priv->clks[clk]);
+
+ usb_put_hcd(hcd);
+
if (pdata == &ehci_platform_defaults)
dev->dev.platform_data = NULL;
return 0;
}
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
static int ehci_platform_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct usb_ehci_pdata *pdata = dev->platform_data;
+ struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
struct platform_device *pdev =
container_of(dev, struct platform_device, dev);
bool do_wakeup = device_may_wakeup(dev);
int ret;
ret = ehci_suspend(hcd, do_wakeup);
+ if (ret)
+ return ret;
if (pdata->power_suspend)
pdata->power_suspend(pdev);
static int ehci_platform_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct usb_ehci_pdata *pdata = dev->platform_data;
+ struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
struct platform_device *pdev =
container_of(dev, struct platform_device, dev);
ehci_resume(hcd, false);
return 0;
}
-
-#else /* !CONFIG_PM */
-#define ehci_platform_suspend NULL
-#define ehci_platform_resume NULL
-#endif /* CONFIG_PM */
+#endif /* CONFIG_PM_SLEEP */
static const struct of_device_id vt8500_ehci_ids[] = {
{ .compatible = "via,vt8500-ehci", },
{ .compatible = "wm,prizm-ehci", },
+ { .compatible = "generic-ehci", },
{}
};
+MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
static const struct platform_device_id ehci_platform_table[] = {
{ "ehci-platform", 0 },
};
MODULE_DEVICE_TABLE(platform, ehci_platform_table);
-static const struct dev_pm_ops ehci_platform_pm_ops = {
- .suspend = ehci_platform_suspend,
- .resume = ehci_platform_resume,
-};
+static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
+ ehci_platform_resume);
static struct platform_driver ehci_platform_driver = {
.id_table = ehci_platform_table,
.remove = ehci_platform_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
- .owner = THIS_MODULE,
.name = "ehci-platform",
.pm = &ehci_platform_pm_ops,
- .of_match_table = of_match_ptr(vt8500_ehci_ids),
+ .of_match_table = vt8500_ehci_ids,
}
};
projects / firefly-linux-kernel-4.4.55.git / commitdiff