summaryrefslogtreecommitdiff
path: root/drivers/usb/host/ohci-exynos.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/host/ohci-exynos.c')
-rw-r--r--drivers/usb/host/ohci-exynos.c123
1 files changed, 81 insertions, 42 deletions
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 20a50081f922..e3b7e85120e4 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -15,14 +15,44 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/platform_data/usb-exynos.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/samsung_usb_phy.h>
#include <plat/usb-phy.h>
struct exynos_ohci_hcd {
struct device *dev;
struct usb_hcd *hcd;
struct clk *clk;
+ struct usb_phy *phy;
+ struct usb_otg *otg;
+ struct exynos4_ohci_platdata *pdata;
};
+static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci)
+{
+ struct platform_device *pdev = to_platform_device(exynos_ohci->dev);
+
+ if (exynos_ohci->phy)
+ usb_phy_init(exynos_ohci->phy);
+ else if (exynos_ohci->pdata->phy_init)
+ exynos_ohci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
+}
+
+static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci)
+{
+ struct platform_device *pdev = to_platform_device(exynos_ohci->dev);
+
+ if (exynos_ohci->phy)
+ usb_phy_shutdown(exynos_ohci->phy);
+ else if (exynos_ohci->pdata->phy_exit)
+ exynos_ohci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
+}
+
+static int ohci_exynos_reset(struct usb_hcd *hcd)
+{
+ return ohci_init(hcd_to_ohci(hcd));
+}
+
static int ohci_exynos_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
@@ -30,10 +60,6 @@ static int ohci_exynos_start(struct usb_hcd *hcd)
ohci_dbg(ohci, "ohci_exynos_start, ohci:%p", ohci);
- ret = ohci_init(ohci);
- if (ret < 0)
- return ret;
-
ret = ohci_run(ohci);
if (ret < 0) {
dev_err(hcd->self.controller, "can't start %s\n",
@@ -53,6 +79,7 @@ static const struct hc_driver exynos_ohci_hc_driver = {
.irq = ohci_irq,
.flags = HCD_MEMORY|HCD_USB11,
+ .reset = ohci_exynos_reset,
.start = ohci_exynos_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
@@ -74,22 +101,17 @@ static const struct hc_driver exynos_ohci_hc_driver = {
static u64 ohci_exynos_dma_mask = DMA_BIT_MASK(32);
-static int __devinit exynos_ohci_probe(struct platform_device *pdev)
+static int exynos_ohci_probe(struct platform_device *pdev)
{
- struct exynos4_ohci_platdata *pdata;
+ struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
struct exynos_ohci_hcd *exynos_ohci;
struct usb_hcd *hcd;
struct ohci_hcd *ohci;
struct resource *res;
+ struct usb_phy *phy;
int irq;
int err;
- pdata = pdev->dev.platform_data;
- if (!pdata) {
- dev_err(&pdev->dev, "No platform data defined\n");
- return -EINVAL;
- }
-
/*
* Right now device-tree probed devices don't get dma_mask set.
* Since shared usb code relies on it, set it here for now.
@@ -105,6 +127,20 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
if (!exynos_ohci)
return -ENOMEM;
+ phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR_OR_NULL(phy)) {
+ /* Fallback to pdata */
+ if (!pdata) {
+ dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
+ return -EPROBE_DEFER;
+ } else {
+ exynos_ohci->pdata = pdata;
+ }
+ } else {
+ exynos_ohci->phy = phy;
+ exynos_ohci->otg = phy->otg;
+ }
+
exynos_ohci->dev = &pdev->dev;
hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev,
@@ -115,7 +151,7 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
}
exynos_ohci->hcd = hcd;
- exynos_ohci->clk = clk_get(&pdev->dev, "usbhost");
+ exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
if (IS_ERR(exynos_ohci->clk)) {
dev_err(&pdev->dev, "Failed to get usbhost clock\n");
@@ -123,9 +159,9 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
goto fail_clk;
}
- err = clk_enable(exynos_ohci->clk);
+ err = clk_prepare_enable(exynos_ohci->clk);
if (err)
- goto fail_clken;
+ goto fail_clk;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -150,8 +186,11 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
goto fail_io;
}
- if (pdata->phy_init)
- pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+ if (exynos_ohci->otg)
+ exynos_ohci->otg->set_host(exynos_ohci->otg,
+ &exynos_ohci->hcd->self);
+
+ exynos_ohci_phy_enable(exynos_ohci);
ohci = hcd_to_ohci(hcd);
ohci_hcd_init(ohci);
@@ -159,35 +198,36 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err) {
dev_err(&pdev->dev, "Failed to add USB HCD\n");
- goto fail_io;
+ goto fail_add_hcd;
}
platform_set_drvdata(pdev, exynos_ohci);
return 0;
+fail_add_hcd:
+ exynos_ohci_phy_disable(exynos_ohci);
fail_io:
- clk_disable(exynos_ohci->clk);
-fail_clken:
- clk_put(exynos_ohci->clk);
+ clk_disable_unprepare(exynos_ohci->clk);
fail_clk:
usb_put_hcd(hcd);
return err;
}
-static int __devexit exynos_ohci_remove(struct platform_device *pdev)
+static int exynos_ohci_remove(struct platform_device *pdev)
{
- struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
struct usb_hcd *hcd = exynos_ohci->hcd;
usb_remove_hcd(hcd);
- if (pdata && pdata->phy_exit)
- pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+ if (exynos_ohci->otg)
+ exynos_ohci->otg->set_host(exynos_ohci->otg,
+ &exynos_ohci->hcd->self);
+
+ exynos_ohci_phy_disable(exynos_ohci);
- clk_disable(exynos_ohci->clk);
- clk_put(exynos_ohci->clk);
+ clk_disable_unprepare(exynos_ohci->clk);
usb_put_hcd(hcd);
@@ -209,8 +249,6 @@ static int exynos_ohci_suspend(struct device *dev)
struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
struct usb_hcd *hcd = exynos_ohci->hcd;
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- struct platform_device *pdev = to_platform_device(dev);
- struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
unsigned long flags;
int rc = 0;
@@ -229,10 +267,13 @@ static int exynos_ohci_suspend(struct device *dev)
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
- if (pdata && pdata->phy_exit)
- pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+ if (exynos_ohci->otg)
+ exynos_ohci->otg->set_host(exynos_ohci->otg,
+ &exynos_ohci->hcd->self);
+
+ exynos_ohci_phy_disable(exynos_ohci);
- clk_disable(exynos_ohci->clk);
+ clk_disable_unprepare(exynos_ohci->clk);
fail:
spin_unlock_irqrestore(&ohci->lock, flags);
@@ -244,18 +285,16 @@ static int exynos_ohci_resume(struct device *dev)
{
struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
struct usb_hcd *hcd = exynos_ohci->hcd;
- struct platform_device *pdev = to_platform_device(dev);
- struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
- clk_enable(exynos_ohci->clk);
+ clk_prepare_enable(exynos_ohci->clk);
- if (pdata && pdata->phy_init)
- pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+ if (exynos_ohci->otg)
+ exynos_ohci->otg->set_host(exynos_ohci->otg,
+ &exynos_ohci->hcd->self);
- /* Mark hardware accessible again as we are out of D3 state by now */
- set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ exynos_ohci_phy_enable(exynos_ohci);
- ohci_finish_controller_resume(hcd);
+ ohci_resume(hcd, false);
return 0;
}
@@ -271,7 +310,7 @@ static const struct dev_pm_ops exynos_ohci_pm_ops = {
#ifdef CONFIG_OF
static const struct of_device_id exynos_ohci_match[] = {
- { .compatible = "samsung,exynos-ohci" },
+ { .compatible = "samsung,exynos4210-ohci" },
{},
};
MODULE_DEVICE_TABLE(of, exynos_ohci_match);
@@ -279,7 +318,7 @@ MODULE_DEVICE_TABLE(of, exynos_ohci_match);
static struct platform_driver exynos_ohci_driver = {
.probe = exynos_ohci_probe,
- .remove = __devexit_p(exynos_ohci_remove),
+ .remove = exynos_ohci_remove,
.shutdown = exynos_ohci_shutdown,
.driver = {
.name = "exynos-ohci",
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-09 18:57:01 +0300