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Message-ID: <1381866857-3861-3-git-send-email-kishon@ti.com>
Date: Wed, 16 Oct 2013 01:24:12 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: <kishon@...com>, <balbi@...com>, <gregkh@...uxfoundation.org>
CC: <rob.herring@...xeda.com>, <pawel.moll@....com>,
<mark.rutland@....com>, <swarren@...dotorg.org>,
<ijc+devicetree@...lion.org.uk>, <rob@...dley.net>,
<bcousson@...libre.com>, <tony@...mide.com>,
<linux@....linux.org.uk>, <grant.likely@...aro.org>,
<s.nawrocki@...sung.com>, <galak@...eaurora.org>,
<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>, <linux-usb@...r.kernel.org>
Subject: [PATCH v2 2/7] usb: dwc3: adapt dwc3 core to use Generic PHY Framework
Adapted dwc3 core to use the Generic PHY Framework. So for init, exit,
power_on and power_off the following APIs are used phy_init(), phy_exit(),
phy_power_on() and phy_power_off().
However using the old USB phy library wont be removed till the PHYs of all
other SoC's using dwc3 core is adapted to the Generic PHY Framework.
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
Documentation/devicetree/bindings/usb/dwc3.txt | 6 ++-
drivers/usb/dwc3/Kconfig | 1 +
drivers/usb/dwc3/core.c | 52 ++++++++++++++++++++++++
drivers/usb/dwc3/core.h | 7 ++++
drivers/usb/dwc3/platform_data.h | 2 +
5 files changed, 66 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index e807635..471366d 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -6,11 +6,13 @@ Required properties:
- compatible: must be "snps,dwc3"
- reg : Address and length of the register set for the device
- interrupts: Interrupts used by the dwc3 controller.
+
+Optional properties:
- usb-phy : array of phandle for the PHY device. The first element
in the array is expected to be a handle to the USB2/HS PHY and
the second element is expected to be a handle to the USB3/SS PHY
-
-Optional properties:
+ - phys: from the *Generic PHY* bindings
+ - phy-names: from the *Generic PHY* bindings
- tx-fifo-resize: determines if the FIFO *has* to be reallocated.
This is usually a subnode to DWC3 glue to which it is connected.
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 8e385b4..64eed6f 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -2,6 +2,7 @@ config USB_DWC3
tristate "DesignWare USB3 DRD Core Support"
depends on (USB || USB_GADGET) && HAS_DMA
select USB_PHY
+ select GENERIC_PHY
select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD
help
Say Y or M here if your system has a Dual Role SuperSpeed
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index cb91d70..28bfa5b 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -82,6 +82,12 @@ static void dwc3_core_soft_reset(struct dwc3 *dwc)
usb_phy_init(dwc->usb2_phy);
usb_phy_init(dwc->usb3_phy);
+
+ if (dwc->usb2_generic_phy)
+ phy_init(dwc->usb2_generic_phy);
+ if (dwc->usb3_generic_phy)
+ phy_init(dwc->usb3_generic_phy);
+
mdelay(100);
/* Clear USB3 PHY reset */
@@ -343,6 +349,11 @@ static void dwc3_core_exit(struct dwc3 *dwc)
{
usb_phy_shutdown(dwc->usb2_phy);
usb_phy_shutdown(dwc->usb3_phy);
+
+ if (dwc->usb2_generic_phy)
+ phy_power_off(dwc->usb2_generic_phy);
+ if (dwc->usb3_generic_phy)
+ phy_power_off(dwc->usb3_generic_phy);
}
#define DWC3_ALIGN_MASK (16 - 1)
@@ -439,6 +450,26 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
}
+ count = of_property_match_string(node, "phy-names", "usb2-phy");
+ if (count >= 0 || (pdata && pdata->usb2_generic_phy)) {
+ dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
+ if (IS_ERR(dwc->usb2_generic_phy)) {
+ dev_err(dev, "no usb2 phy configured yet");
+ return PTR_ERR(dwc->usb2_generic_phy);
+ }
+ dwc->usb2_phy = NULL;
+ }
+
+ count = of_property_match_string(node, "phy-names", "usb3-phy");
+ if (count >= 0 || (pdata && pdata->usb3_generic_phy)) {
+ dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
+ if (IS_ERR(dwc->usb3_generic_phy)) {
+ dev_err(dev, "no usb3 phy configured yet");
+ return PTR_ERR(dwc->usb3_generic_phy);
+ }
+ dwc->usb3_phy = NULL;
+ }
+
/* default to superspeed if no maximum_speed passed */
if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
dwc->maximum_speed = USB_SPEED_SUPER;
@@ -462,6 +493,11 @@ static int dwc3_probe(struct platform_device *pdev)
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
+ if (dwc->usb2_generic_phy)
+ phy_power_on(dwc->usb2_generic_phy);
+ if (dwc->usb3_generic_phy)
+ phy_power_on(dwc->usb3_generic_phy);
+
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
@@ -588,6 +624,11 @@ static int dwc3_remove(struct platform_device *pdev)
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
+ if (dwc->usb2_generic_phy)
+ phy_power_off(dwc->usb2_generic_phy);
+ if (dwc->usb3_generic_phy)
+ phy_power_off(dwc->usb3_generic_phy);
+
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -685,6 +726,11 @@ static int dwc3_suspend(struct device *dev)
usb_phy_shutdown(dwc->usb3_phy);
usb_phy_shutdown(dwc->usb2_phy);
+ if (dwc->usb2_generic_phy)
+ phy_exit(dwc->usb2_generic_phy);
+ if (dwc->usb3_generic_phy)
+ phy_exit(dwc->usb3_generic_phy);
+
return 0;
}
@@ -695,6 +741,12 @@ static int dwc3_resume(struct device *dev)
usb_phy_init(dwc->usb3_phy);
usb_phy_init(dwc->usb2_phy);
+
+ if (dwc->usb2_generic_phy)
+ phy_init(dwc->usb2_generic_phy);
+ if (dwc->usb3_generic_phy)
+ phy_init(dwc->usb3_generic_phy);
+
msleep(100);
spin_lock_irqsave(&dwc->lock, flags);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index f8af8d4..01ec7d7 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -31,6 +31,8 @@
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
+#include <linux/phy/phy.h>
+
/* Global constants */
#define DWC3_EP0_BOUNCE_SIZE 512
#define DWC3_ENDPOINTS_NUM 32
@@ -613,6 +615,8 @@ struct dwc3_scratchpad_array {
* @dr_mode: requested mode of operation
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
+ * @usb2_generic_phy: pointer to USB2 PHY
+ * @usb3_generic_phy: pointer to USB3 PHY
* @dcfg: saved contents of DCFG register
* @gctl: saved contents of GCTL register
* @is_selfpowered: true when we are selfpowered
@@ -665,6 +669,9 @@ struct dwc3 {
struct usb_phy *usb2_phy;
struct usb_phy *usb3_phy;
+ struct phy *usb2_generic_phy;
+ struct phy *usb3_generic_phy;
+
void __iomem *regs;
size_t regs_size;
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index 49ffa6d..fc62a0f 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -26,4 +26,6 @@ struct dwc3_platform_data {
bool tx_fifo_resize;
bool usb2_phy;
bool usb3_phy;
+ bool usb2_generic_phy;
+ bool usb3_generic_phy;
};
--
1.7.10.4
--
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