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Message-id: <1355841786-13307-4-git-send-email-gautam.vivek@samsung.com>
Date: Tue, 18 Dec 2012 20:13:05 +0530
From: Vivek Gautam <gautam.vivek@...sung.com>
To: linux-usb@...r.kernel.org
Cc: devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
linux-samsung-soc@...r.kernel.org, gregkh@...uxfoundation.org,
balbi@...com, stern@...land.harvard.edu, kgene.kim@...sung.com,
thomas.abraham@...aro.org, rob.herring@...xeda.com,
grant.likely@...retlab.ca, sylvester.nawrocki@...il.com,
jg1.han@...sung.com, yulgon.kim@...sung.com, kishon@...com,
p.paneri@...sung.com
Subject: [PATCH v5 3/4] USB: ehci-s5p: Add phy driver support
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@...sung.com>
Acked-by: Jingoo Han <jg1.han@...sung.com>
---
drivers/usb/host/ehci-s5p.c | 70 ++++++++++++++++++++++++++++++-------------
1 files changed, 49 insertions(+), 21 deletions(-)
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 46ca5ef..50c93af 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 +34,8 @@ struct s5p_ehci_hcd {
struct device *dev;
struct usb_hcd *hcd;
struct clk *clk;
+ struct usb_phy *phy;
+ struct s5p_ehci_platdata *pdata;
};
static const struct hc_driver s5p_ehci_hc_driver = {
@@ -66,6 +69,30 @@ 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) {
+ samsung_usbphy_set_type(s5p_ehci->phy, USB_PHY_TYPE_HOST);
+ 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) {
+ samsung_usbphy_set_type(s5p_ehci->phy, USB_PHY_TYPE_HOST);
+ 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 +115,15 @@ 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 +141,19 @@ 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_err(&pdev->dev, "no platform data or transceiver defined\n");
+ return -EPROBE_DEFER;
+ } else {
+ s5p_ehci->pdata = pdata;
+ }
+ } else {
+ s5p_ehci->phy = phy;
+ }
+
s5p_ehci->dev = &pdev->dev;
hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
@@ -164,8 +199,7 @@ static int s5p_ehci_probe(struct platform_device *pdev)
goto fail_io;
}
- if (pdata->phy_init)
- pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
+ s5p_ehci_phy_enable(s5p_ehci);
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
@@ -176,13 +210,15 @@ 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 +228,12 @@ 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);
+ s5p_ehci_phy_disable(s5p_ehci);
clk_disable_unprepare(s5p_ehci->clk);
@@ -223,14 +257,11 @@ 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);
+ s5p_ehci_phy_disable(s5p_ehci);
clk_disable_unprepare(s5p_ehci->clk);
@@ -241,13 +272,10 @@ 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);
+ s5p_ehci_phy_enable(s5p_ehci);
/* DMA burst Enable */
writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
--
1.7.6.5
--
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