[PATCH v6 3/4] USB: ehci-s5p: Add phy driver support

Vivek Gautam
2013-01-11T14:56:27Z

Adding the phy driver to ehci-s5p. 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>
---
drivers/usb/host/ehci-s5p.c | 80 +++++++++++++++++++++++++++++++-----------
1 files changed, 59 insertions(+), 21 deletions(-)

diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 46ca5ef..d603e6e 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include <linux/of_gpio.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>

@@ -33,6 +34,9 @@ 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 = {
@@ -66,6 +70,26 @@ static const struct hc_driver s5p_ehci_hc_driver = {
.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);
+}
+
static void s5p_setup_vbus_gpio(struct platform_device *pdev)
{
int err;
@@ -88,20 +112,15 @@ static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);

static int s5p_ehci_probe(struct platform_device *pdev)
{
- struct s5p_ehci_platdata *pdata;
+ struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
struct s5p_ehci_hcd *s5p_ehci;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
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.
@@ -119,6 +138,20 @@ static int s5p_ehci_probe(struct platform_device *pdev)
if (!s5p_ehci)
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 {
+ s5p_ehci->pdata = pdata;
+ }
+ } else {
+ s5p_ehci->phy = phy;
+ s5p_ehci->otg = phy->otg;
+ }
+
s5p_ehci->dev = &pdev->dev;

hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
@@ -164,8 +197,10 @@ static int s5p_ehci_probe(struct platform_device *pdev)
goto fail_io;
}

- if (pdata->phy_init)
- pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
+ if (s5p_ehci->otg)
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+
+ s5p_ehci_phy_enable(s5p_ehci);

ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
@@ -176,13 +211,15 @@ static int s5p_ehci_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, s5p_ehci);

return 0;

+fail_add_hcd:
+ s5p_ehci_phy_disable(s5p_ehci);
fail_io:
clk_disable_unprepare(s5p_ehci->clk);
fail_clk:
@@ -192,14 +229,15 @@ fail_clk:

static int s5p_ehci_remove(struct platform_device *pdev)
{
- struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
struct usb_hcd *hcd = s5p_ehci->hcd;

usb_remove_hcd(hcd);

- if (pdata && pdata->phy_exit)
- pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
+ if (s5p_ehci->otg)
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+
+ s5p_ehci_phy_disable(s5p_ehci);

clk_disable_unprepare(s5p_ehci->clk);

@@ -223,14 +261,14 @@ 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;
bool do_wakeup = device_may_wakeup(dev);
- struct platform_device *pdev = to_platform_device(dev);
- struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
int rc;

rc = ehci_suspend(hcd, do_wakeup);

- if (pdata && pdata->phy_exit)
- pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
+ if (s5p_ehci->otg)
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+
+ s5p_ehci_phy_disable(s5p_ehci);

clk_disable_unprepare(s5p_ehci->clk);

@@ -241,13 +279,13 @@ 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 platform_device *pdev = to_platform_device(dev);
- struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;

clk_prepare_enable(s5p_ehci->clk);

- if (pdata && pdata->phy_init)
- pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
+ if (s5p_ehci->otg)
+ s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
+
+ s5p_ehci_phy_enable(s5p_ehci);

/* DMA burst Enable */
writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
--
1.7.6.5