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USB: ohci-exynos: Add phy driver support

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Adding the phy-driver to ohci-exynos. Keeping the platform data
for continuing the smooth operation for boards which still uses it

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Vivek Gautam 2013-01-22 18:30:43 +05:30 committed by Felipe Balbi
parent d233c196ce
commit ed993bf19b
1 changed files with 63 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
drivers/usb/host/ohci-exynos.c
View File

@ -15,6 +15,7 @@
#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>
@ -22,8 +23,31 @@ 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));
@ -79,20 +103,15 @@ static u64 ohci_exynos_dma_mask = DMA_BIT_MASK(32);
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.
@ -108,6 +127,20 @@ static int 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,
@ -153,8 +186,11 @@ static int exynos_ohci_probe(struct platform_device *pdev)
goto fail_io;
}
if (pdata->phy_init)
pdata->phy_init(pdev, USB_PHY_TYPE_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);
@ -162,13 +198,15 @@ static int 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:
@ -178,14 +216,16 @@ fail_clk:
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, USB_PHY_TYPE_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_unprepare(exynos_ohci->clk);
@ -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;
@ -229,8 +267,11 @@ 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, USB_PHY_TYPE_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_unprepare(exynos_ohci->clk);
@ -244,13 +285,14 @@ 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, USB_PHY_TYPE_HOST);
if (exynos_ohci->otg)
exynos_ohci->otg->set_host(exynos_ohci->otg,
&exynos_ohci->hcd->self);
exynos_ohci_phy_enable(exynos_ohci);
ohci_resume(hcd, false);