Adding the transceiver to ohci driver. Keeping the platform data
for continuing the smooth operation for boards which still uses it
Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
Acked-by: Jingoo Han <jg1.han@xxxxxxxxxxx>
---
No change since v2.
drivers/usb/host/ohci-exynos.c | 65 +++++++++++++++++++++++++++------------
1 files changed, 45 insertions(+), 20 deletions(-)
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 2f30329..c98dd96 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -15,14 +15,37 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/platform_data/usb-exynos.h>
+#include <linux/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 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, S5P_USB_PHY_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, S5P_USB_PHY_HOST);
+}
+
static int ohci_exynos_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
@@ -81,15 +104,10 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
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 +123,20 @@ static int __devinit exynos_ohci_probe(struct platform_device *pdev)
if (!exynos_ohci)
return -ENOMEM;
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ /* Fallback to Phy transceiver */
+ phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR_OR_NULL(phy)) {
+ dev_err(&pdev->dev, "no platform data or transceiver defined\n");
+ return -EPROBE_DEFER;
+ } else {
+ exynos_ohci->phy = phy;
+ }
+ } else {
+ exynos_ohci->pdata = pdata;
+ }
+
exynos_ohci->dev = &pdev->dev;
hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev,
@@ -150,8 +182,7 @@ 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);
+ exynos_ohci_phy_enable(exynos_ohci);
ohci = hcd_to_ohci(hcd);
ohci_hcd_init(ohci);
@@ -159,13 +190,15 @@ 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_unprepare(exynos_ohci->clk);
fail_clk:
@@ -175,14 +208,12 @@ fail_clk:
static int __devexit 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);
+ exynos_ohci_phy_disable(exynos_ohci);
clk_disable_unprepare(exynos_ohci->clk);
@@ -206,8 +237,6 @@ 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;
@@ -226,8 +255,7 @@ 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);
+ exynos_ohci_phy_disable(exynos_ohci);
clk_disable_unprepare(exynos_ohci->clk);
@@ -241,13 +269,10 @@ 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_prepare_enable(exynos_ohci->clk);
- if (pdata && pdata->phy_init)
- pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+ exynos_ohci_phy_enable(exynos_ohci);
ohci_resume(hcd, false);
--
1.7.6.5
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