aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host/ehci-s5p.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/host/ehci-s5p.c')
-rw-r--r--drivers/usb/host/ehci-s5p.c180
1 files changed, 88 insertions, 92 deletions
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 20ebf6a8b7f..635775278c7 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -13,13 +13,23 @@
*/
#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/of.h>
-#include <linux/platform_device.h>
#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
#include <linux/platform_data/usb-ehci-s5p.h>
#include <linux/usb/phy.h>
#include <linux/usb/samsung_usb_phy.h>
-#include <plat/usb-phy.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/otg.h>
+
+#include "ehci.h"
+
+#define DRIVER_DESC "EHCI s5p driver"
#define EHCI_INSNREG00(base) (base + 0x90)
#define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
@@ -30,82 +40,35 @@
(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 | \
EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)
+static const char hcd_name[] = "ehci-s5p";
+static struct hc_driver __read_mostly s5p_ehci_hc_driver;
+
struct s5p_ehci_hcd {
- struct device *dev;
- struct usb_hcd *hcd;
struct clk *clk;
struct usb_phy *phy;
struct usb_otg *otg;
struct s5p_ehci_platdata *pdata;
};
-static const struct hc_driver s5p_ehci_hc_driver = {
- .description = hcd_name,
- .product_desc = "S5P EHCI Host Controller",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_USB2,
-
- .reset = ehci_setup,
- .start = ehci_run,
- .stop = ehci_stop,
- .shutdown = ehci_shutdown,
-
- .get_frame_number = ehci_get_frame,
-
- .urb_enqueue = ehci_urb_enqueue,
- .urb_dequeue = ehci_urb_dequeue,
- .endpoint_disable = ehci_endpoint_disable,
- .endpoint_reset = ehci_endpoint_reset,
-
- .hub_status_data = ehci_hub_status_data,
- .hub_control = ehci_hub_control,
- .bus_suspend = ehci_bus_suspend,
- .bus_resume = ehci_bus_resume,
-
- .relinquish_port = ehci_relinquish_port,
- .port_handed_over = ehci_port_handed_over,
-
- .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-};
-
-static void s5p_ehci_phy_enable(struct s5p_ehci_hcd *s5p_ehci)
-{
- struct platform_device *pdev = to_platform_device(s5p_ehci->dev);
-
- if (s5p_ehci->phy)
- usb_phy_init(s5p_ehci->phy);
- else if (s5p_ehci->pdata->phy_init)
- s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
-}
-
-static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci)
-{
- struct platform_device *pdev = to_platform_device(s5p_ehci->dev);
-
- if (s5p_ehci->phy)
- usb_phy_shutdown(s5p_ehci->phy);
- else if (s5p_ehci->pdata->phy_exit)
- s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
-}
+#define to_s5p_ehci(hcd) (struct s5p_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
static void s5p_setup_vbus_gpio(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
int err;
int gpio;
- if (!pdev->dev.of_node)
+ if (!dev->of_node)
return;
- gpio = of_get_named_gpio(pdev->dev.of_node,
- "samsung,vbus-gpio", 0);
+ gpio = of_get_named_gpio(dev->of_node, "samsung,vbus-gpio", 0);
if (!gpio_is_valid(gpio))
return;
- err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
+ err = devm_gpio_request_one(dev, gpio, GPIOF_OUT_INIT_HIGH,
+ "ehci_vbus_gpio");
if (err)
- dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
+ dev_err(dev, "can't request ehci vbus gpio %d", gpio);
}
static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
@@ -133,13 +96,15 @@ static int s5p_ehci_probe(struct platform_device *pdev)
s5p_setup_vbus_gpio(pdev);
- s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
- GFP_KERNEL);
- if (!s5p_ehci)
+ hcd = usb_create_hcd(&s5p_ehci_hc_driver,
+ &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd) {
+ dev_err(&pdev->dev, "Unable to create HCD\n");
return -ENOMEM;
-
+ }
+ s5p_ehci = to_s5p_ehci(hcd);
phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
- if (IS_ERR_OR_NULL(phy)) {
+ if (IS_ERR(phy)) {
/* Fallback to pdata */
if (!pdata) {
dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
@@ -152,16 +117,6 @@ static int s5p_ehci_probe(struct platform_device *pdev)
s5p_ehci->otg = phy->otg;
}
- s5p_ehci->dev = &pdev->dev;
-
- hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
- dev_name(&pdev->dev));
- if (!hcd) {
- dev_err(&pdev->dev, "Unable to create HCD\n");
- return -ENOMEM;
- }
-
- s5p_ehci->hcd = hcd;
s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
if (IS_ERR(s5p_ehci->clk)) {
@@ -198,9 +153,12 @@ static int s5p_ehci_probe(struct platform_device *pdev)
}
if (s5p_ehci->otg)
- s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
- s5p_ehci_phy_enable(s5p_ehci);
+ if (s5p_ehci->phy)
+ usb_phy_init(s5p_ehci->phy);
+ else if (s5p_ehci->pdata->phy_init)
+ s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
@@ -214,12 +172,15 @@ static int s5p_ehci_probe(struct platform_device *pdev)
goto fail_add_hcd;
}
- platform_set_drvdata(pdev, s5p_ehci);
+ platform_set_drvdata(pdev, hcd);
return 0;
fail_add_hcd:
- s5p_ehci_phy_disable(s5p_ehci);
+ if (s5p_ehci->phy)
+ usb_phy_shutdown(s5p_ehci->phy);
+ else if (s5p_ehci->pdata->phy_exit)
+ s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
fail_io:
clk_disable_unprepare(s5p_ehci->clk);
fail_clk:
@@ -229,15 +190,18 @@ fail_clk:
static int s5p_ehci_remove(struct platform_device *pdev)
{
- struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
- struct usb_hcd *hcd = s5p_ehci->hcd;
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd);
usb_remove_hcd(hcd);
if (s5p_ehci->otg)
- s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
- s5p_ehci_phy_disable(s5p_ehci);
+ if (s5p_ehci->phy)
+ usb_phy_shutdown(s5p_ehci->phy);
+ else if (s5p_ehci->pdata->phy_exit)
+ s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
clk_disable_unprepare(s5p_ehci->clk);
@@ -248,8 +212,7 @@ static int s5p_ehci_remove(struct platform_device *pdev)
static void s5p_ehci_shutdown(struct platform_device *pdev)
{
- struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
- struct usb_hcd *hcd = s5p_ehci->hcd;
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
@@ -258,17 +221,22 @@ static void s5p_ehci_shutdown(struct platform_device *pdev)
#ifdef CONFIG_PM
static int s5p_ehci_suspend(struct device *dev)
{
- struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
- struct usb_hcd *hcd = s5p_ehci->hcd;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd);
+ struct platform_device *pdev = to_platform_device(dev);
+
bool do_wakeup = device_may_wakeup(dev);
int rc;
rc = ehci_suspend(hcd, do_wakeup);
if (s5p_ehci->otg)
- s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
- s5p_ehci_phy_disable(s5p_ehci);
+ if (s5p_ehci->phy)
+ usb_phy_shutdown(s5p_ehci->phy);
+ else if (s5p_ehci->pdata->phy_exit)
+ s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
clk_disable_unprepare(s5p_ehci->clk);
@@ -277,15 +245,19 @@ static int s5p_ehci_suspend(struct device *dev)
static int s5p_ehci_resume(struct device *dev)
{
- struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
- struct usb_hcd *hcd = s5p_ehci->hcd;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd);
+ struct platform_device *pdev = to_platform_device(dev);
clk_prepare_enable(s5p_ehci->clk);
if (s5p_ehci->otg)
- s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
- s5p_ehci_phy_enable(s5p_ehci);
+ if (s5p_ehci->phy)
+ usb_phy_init(s5p_ehci->phy);
+ else if (s5p_ehci->pdata->phy_init)
+ s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
/* DMA burst Enable */
writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
@@ -322,5 +294,29 @@ static struct platform_driver s5p_ehci_driver = {
.of_match_table = of_match_ptr(exynos_ehci_match),
}
};
+static const struct ehci_driver_overrides s5p_overrides __initdata = {
+ .extra_priv_size = sizeof(struct s5p_ehci_hcd),
+};
+
+static int __init ehci_s5p_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+ ehci_init_driver(&s5p_ehci_hc_driver, &s5p_overrides);
+ return platform_driver_register(&s5p_ehci_driver);
+}
+module_init(ehci_s5p_init);
+
+static void __exit ehci_s5p_cleanup(void)
+{
+ platform_driver_unregister(&s5p_ehci_driver);
+}
+module_exit(ehci_s5p_cleanup);
+MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:s5p-ehci");
+MODULE_AUTHOR("Jingoo Han");
+MODULE_AUTHOR("Joonyoung Shim");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-26 02:26:59 +0000