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Message-id: <1391016574-25237-9-git-send-email-k.debski@samsung.com>
Date: Wed, 29 Jan 2014 18:29:34 +0100
From: Kamil Debski <k.debski@...sung.com>
To: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-usb@...r.kernel.org, devicetree@...r.kernel.org
Cc: kyungmin.park@...sung.com, kishon@...com, t.figa@...sung.com,
s.nawrocki@...sung.com, m.szyprowski@...sung.com,
gautam.vivek@...sung.com, mat.krawczuk@...il.com,
yulgon.kim@...sung.com, p.paneri@...sung.com,
av.tikhomirov@...sung.com, jg1.han@...sung.com,
galak@...eaurora.org, matt.porter@...aro.org, k.debski@...sung.com,
tjakobi@...h.uni-bielefeld.de, stern@...land.harvard.edu
Subject: [PATCH v6 8/8] usb: ehci-exynos: Change to use phy provided by the
generic phy framework
Change the phy provider used from the old one using the USB phy
framework to a new one using the Generic phy framework.
Signed-off-by: Kamil Debski <k.debski@...sung.com>
---
.../devicetree/bindings/usb/exynos-usb.txt | 13 +++
drivers/usb/host/ehci-exynos.c | 97 +++++++++++++-------
2 files changed, 76 insertions(+), 34 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/exynos-usb.txt b/Documentation/devicetree/bindings/usb/exynos-usb.txt
index d967ba1..25e199a 100644
--- a/Documentation/devicetree/bindings/usb/exynos-usb.txt
+++ b/Documentation/devicetree/bindings/usb/exynos-usb.txt
@@ -12,6 +12,10 @@ Required properties:
- interrupts: interrupt number to the cpu.
- clocks: from common clock binding: handle to usb clock.
- clock-names: from common clock binding: Shall be "usbhost".
+ - 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.
Optional properties:
- samsung,vbus-gpio: if present, specifies the GPIO that
@@ -27,6 +31,15 @@ Example:
clocks = <&clock 285>;
clock-names = "usbhost";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ phys = <&usb2phy 1>;
+ phy-names = "host";
+ status = "disabled";
+ };
};
OHCI
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index d1d8c47..7c35501 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;
@@ -102,14 +132,26 @@ 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;
- exynos_ehci->otg = phy->otg;
+ 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");
+ of_node_put(child);
+ return err;
+ }
+ if (phy_number >= PHY_NUMBER) {
+ dev_err(&pdev->dev, "Failed to parse device tree - number out of range\n");
+ of_node_put(child);
+ 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;
}
skip_phy:
@@ -149,11 +191,11 @@ 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_io;
+ }
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
@@ -173,8 +215,7 @@ skip_phy:
return 0;
fail_add_hcd:
- if (exynos_ehci->phy)
- usb_phy_shutdown(exynos_ehci->phy);
+ exynos_phys_off(exynos_ehci->phy);
fail_io:
clk_disable_unprepare(exynos_ehci->clk);
fail_clk:
@@ -189,11 +230,7 @@ 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);
@@ -213,11 +250,7 @@ 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);
@@ -231,11 +264,7 @@ 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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