[PATCH v4 4/9] usb: ehci-s5p: Change to use phy provided by thegeneric phy framework
From: Kamil Debski
Date: Thu Dec 05 2013 - 07:31:05 EST
Change the phy provider used from the old usb phy specific to a new one
using the generic phy framework.
Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/usb/usb-ehci.txt | 35 ++++++++
drivers/usb/host/ehci-exynos.c | 95 +++++++++++++-------
2 files changed, 97 insertions(+), 33 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
index fa18612..413f7cd 100644
--- a/Documentation/devicetree/bindings/usb/usb-ehci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt
@@ -14,6 +14,10 @@ If controller implementation operates with big endian descriptors,
If both big endian registers and descriptors are used by the controller
implementation, "big-endian" property can be specified instead of having
both "big-endian-regs" and "big-endian-desc".
+ - port: if in the SoC there are EHCI phys, they should be listed here.
+One phy per port. Each port should have its reg entry with a consecutive
+number. Also it should contain phys and phy-names entries specifying the
+phy used by the port.
Example (Sequoia 440EPx):
ehci@e0000300 {
@@ -23,3 +27,34 @@ Example (Sequoia 440EPx):
reg = <0 e0000300 90 0 e0000390 70>;
big-endian;
};
+
+Example (Exynos 4212):
+ ehci@12580000 {
+ compatible = "samsung,exynos4210-ehci";
+ reg = <0x12580000 0x20000>;
+ interrupts = <0 70 0>;
+ clocks = <&clock 304>, <&clock 305>;
+ clock-names = "usbhost", "otg";
+ status = "disabled";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ phys = <&usb2phy 1>;
+ phy-names = "host";
+ status = "disabled";
+ };
+ port@1 {
+ reg = <1>;
+ phys = <&usb2phy 2>;
+ phy-names = "hsic0";
+ status = "disabled";
+ };
+ port@2 {
+ reg = <2>;
+ phys = <&usb2phy 3>;
+ phy-names = "hsic1";
+ status = "disabled";
+ };
+ };
+
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index e97c198..bb81809 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -19,12 +19,12 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
+#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/usb/phy.h>
#include <linux/usb/samsung_usb_phy.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
-#include <linux/usb/otg.h>
#include "ehci.h"
@@ -42,10 +42,10 @@
static const char hcd_name[] = "ehci-exynos";
static struct hc_driver __read_mostly exynos_ehci_hc_driver;
+#define PHY_NUMBER 3
struct exynos_ehci_hcd {
struct clk *clk;
- struct usb_phy *phy;
- struct usb_otg *otg;
+ struct phy *phy[PHY_NUMBER];
};
#define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
@@ -69,13 +69,43 @@ static void exynos_setup_vbus_gpio(struct platform_device *pdev)
dev_err(dev, "can't request ehci vbus gpio %d", gpio);
}
+static int exynos_phys_on(struct phy *p[])
+{
+ int i;
+ int ret = 0;
+
+ for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
+ if (p[i])
+ ret = phy_power_on(p[i]);
+ if (ret)
+ for (i--; i > 0; i--)
+ if (p[i])
+ phy_power_off(p[i]);
+
+ return ret;
+}
+
+static int exynos_phys_off(struct phy *p[])
+{
+ int i;
+ int ret = 0;
+
+ for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
+ if (p[i])
+ ret = phy_power_off(p[i]);
+
+ return ret;
+}
+
static int exynos_ehci_probe(struct platform_device *pdev)
{
struct exynos_ehci_hcd *exynos_ehci;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct resource *res;
- struct usb_phy *phy;
+ struct phy *phy;
+ struct device_node *child;
+ int phy_number;
int irq;
int err;
@@ -102,13 +132,24 @@ static int exynos_ehci_probe(struct platform_device *pdev)
"samsung,exynos5440-ehci"))
goto skip_phy;
- phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
- if (IS_ERR(phy)) {
- usb_put_hcd(hcd);
- dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
- return -EPROBE_DEFER;
- } else {
- exynos_ehci->phy = phy;
+ for_each_available_child_of_node(pdev->dev.of_node, child) {
+ err = of_property_read_u32(child, "reg", &phy_number);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to parse device tree\n");
+ return err;
+ }
+ if (phy_number >= PHY_NUMBER) {
+ dev_err(&pdev->dev, "Failed to parse device tree - number out of range\n");
+ return -EINVAL;
+ }
+ phy = devm_of_phy_get(&pdev->dev, child, 0);
+ of_node_put(child);
+ if (IS_ERR(phy)) {
+ dev_err(&pdev->dev, "Failed to get phy number %d",
+ phy_number);
+ return PTR_ERR(phy);
+ }
+ exynos_ehci->phy[phy_number] = phy;
exynos_ehci->otg = phy->otg;
}
@@ -149,11 +190,11 @@ skip_phy:
goto fail_io;
}
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
- if (exynos_ehci->phy)
- usb_phy_init(exynos_ehci->phy);
+ err = exynos_phys_on(exynos_ehci->phy);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to enabled phys\n");
+ goto fail_phys_on;
+ }
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
@@ -172,8 +213,8 @@ skip_phy:
return 0;
fail_add_hcd:
- if (exynos_ehci->phy)
- usb_phy_shutdown(exynos_ehci->phy);
+ exynos_phys_off(exynos_ehci->phy);
+fail_phys_on:
fail_io:
clk_disable_unprepare(exynos_ehci->clk);
fail_clk:
@@ -188,11 +229,7 @@ static int exynos_ehci_remove(struct platform_device *pdev)
usb_remove_hcd(hcd);
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
- if (exynos_ehci->phy)
- usb_phy_shutdown(exynos_ehci->phy);
+ exynos_phys_off(exynos_ehci->phy);
clk_disable_unprepare(exynos_ehci->clk);
@@ -212,11 +249,7 @@ static int exynos_ehci_suspend(struct device *dev)
rc = ehci_suspend(hcd, do_wakeup);
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
- if (exynos_ehci->phy)
- usb_phy_shutdown(exynos_ehci->phy);
+ exynos_phys_off(exynos_ehci->phy);
clk_disable_unprepare(exynos_ehci->clk);
@@ -230,11 +263,7 @@ static int exynos_ehci_resume(struct device *dev)
clk_prepare_enable(exynos_ehci->clk);
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
- if (exynos_ehci->phy)
- usb_phy_init(exynos_ehci->phy);
+ exynos_phys_on(exynos_ehci->phy);
/* DMA burst Enable */
writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
--
1.7.9.5
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