[PATCH] usb: move phy driver from mach-tegra to drivers/usb

From: Venu Byravarasu
Date: Wed Sep 05 2012 - 09:34:37 EST

As part of this patch:
1. Moved existing tegra phy driver to drivers/USB directory.
2. Added standard USB phy driver APIs to tegra phy driver.

Signed-off-by: Venu Byravarasu <vbyravarasu@xxxxxxxxxx>
---
arch/arm/mach-tegra/Makefile | 1 -
arch/arm/mach-tegra/devices.c | 2 +-
arch/arm/mach-tegra/devices.h | 2 +-
drivers/usb/host/ehci-tegra.c | 14 +-
drivers/usb/phy/Makefile | 1 +
.../usb_phy.c => drivers/usb/phy/tegra_usb_phy.c | 152 +++++++++++---------
.../usb_phy.h => include/linux/usb/tegra_usb_phy.h | 16 +--
7 files changed, 103 insertions(+), 85 deletions(-)
rename arch/arm/mach-tegra/usb_phy.c => drivers/usb/phy/tegra_usb_phy.c (94%)
rename arch/arm/mach-tegra/include/mach/usb_phy.h => include/linux/usb/tegra_usb_phy.h (86%)

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index c3d7303..0e82b7f 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_TEGRA_SYSTEM_DMA) += dma.o
obj-$(CONFIG_CPU_FREQ) += cpu-tegra.o
obj-$(CONFIG_TEGRA_PCI) += pcie.o
-obj-$(CONFIG_USB_SUPPORT) += usb_phy.o

obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-dt-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += board-dt-tegra30.o
diff --git a/arch/arm/mach-tegra/devices.c b/arch/arm/mach-tegra/devices.c
index c70e65f..d8ab762 100644
--- a/arch/arm/mach-tegra/devices.c
+++ b/arch/arm/mach-tegra/devices.c
@@ -27,7 +27,7 @@
#include <mach/irqs.h>
#include <mach/iomap.h>
#include <mach/dma.h>
-#include <mach/usb_phy.h>
+#include <linux/usb/tegra_usb_phy.h>

#include "gpio-names.h"
#include "devices.h"
diff --git a/arch/arm/mach-tegra/devices.h b/arch/arm/mach-tegra/devices.h
index 4f50527..906a61f 100644
--- a/arch/arm/mach-tegra/devices.h
+++ b/arch/arm/mach-tegra/devices.h
@@ -22,7 +22,7 @@
#include <linux/platform_device.h>
#include <linux/platform_data/tegra_usb.h>

-#include <mach/usb_phy.h>
+#include <linux/usb/tegra_usb_phy.h>

extern struct tegra_ulpi_config tegra_ehci2_ulpi_phy_config;

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 26dedb3..c0d4732 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -27,7 +27,7 @@
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>

-#include <mach/usb_phy.h>
+#include <linux/usb/tegra_usb_phy.h>
#include <mach/iomap.h>

#define TEGRA_USB_DMA_ALIGN 32
@@ -49,7 +49,7 @@ static void tegra_ehci_power_up(struct usb_hcd *hcd)

clk_prepare_enable(tegra->emc_clk);
clk_prepare_enable(tegra->clk);
- tegra_usb_phy_power_on(tegra->phy);
+ usb_phy_set_suspend(&tegra->phy->u_phy, 0);
tegra->host_resumed = 1;
}

@@ -58,7 +58,7 @@ static void tegra_ehci_power_down(struct usb_hcd *hcd)
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);

tegra->host_resumed = 0;
- tegra_usb_phy_power_off(tegra->phy);
+ usb_phy_set_suspend(&tegra->phy->u_phy, 1);
clk_disable_unprepare(tegra->clk);
clk_disable_unprepare(tegra->emc_clk);
}
@@ -715,7 +715,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
goto fail_phy;
}

- err = tegra_usb_phy_power_on(tegra->phy);
+ usb_phy_init(&tegra->phy->u_phy);
+
+ err = usb_phy_set_suspend(&tegra->phy->u_phy, 0);
if (err) {
dev_err(&pdev->dev, "Failed to power on the phy\n");
goto fail;
@@ -762,7 +764,7 @@ fail:
usb_put_phy(tegra->transceiver);
}
#endif
- tegra_usb_phy_close(tegra->phy);
+ usb_phy_shutdown(&tegra->phy->u_phy);
fail_phy:
iounmap(hcd->regs);
fail_io:
@@ -800,7 +802,7 @@ static int tegra_ehci_remove(struct platform_device *pdev)

usb_remove_hcd(hcd);

- tegra_usb_phy_close(tegra->phy);
+ usb_phy_shutdown(&tegra->phy->u_phy);
iounmap(hcd->regs);

usb_put_hcd(hcd);
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index cf38f08..bb948fb 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -6,3 +6,4 @@ ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG

obj-$(CONFIG_USB_ISP1301) += isp1301.o
obj-$(CONFIG_MV_U3D_PHY) += mv_u3d_phy.o
+obj-$(CONFIG_USB_EHCI_TEGRA) += tegra_usb_phy.o
diff --git a/arch/arm/mach-tegra/usb_phy.c b/drivers/usb/phy/tegra_usb_phy.c
similarity index 94%
rename from arch/arm/mach-tegra/usb_phy.c
rename to drivers/usb/phy/tegra_usb_phy.c
index 022b33a..4739903 100644
--- a/arch/arm/mach-tegra/usb_phy.c
+++ b/drivers/usb/phy/tegra_usb_phy.c
@@ -1,6 +1,4 @@
/*
- * arch/arm/mach-tegra/usb_phy.c
- *
* Copyright (C) 2010 Google, Inc.
*
* Author:
@@ -31,7 +29,7 @@
#include <linux/usb/ulpi.h>
#include <asm/mach-types.h>
#include <mach/gpio-tegra.h>
-#include <mach/usb_phy.h>
+#include <linux/usb/tegra_usb_phy.h>
#include <mach/iomap.h>

#define ULPI_VIEWPORT 0x170
@@ -482,7 +480,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
return 0;
}

-static void utmi_phy_power_off(struct tegra_usb_phy *phy)
+static int utmi_phy_power_off(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -514,7 +512,7 @@ static void utmi_phy_power_off(struct tegra_usb_phy *phy)
UTMIP_FORCE_PDDR_POWERDOWN;
writel(val, base + UTMIP_XCVR_CFG1);

- utmip_pad_power_off(phy);
+ return utmip_pad_power_off(phy);
}

static void utmi_phy_preresume(struct tegra_usb_phy *phy)
@@ -638,7 +636,7 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
return 0;
}

-static void ulpi_phy_power_off(struct tegra_usb_phy *phy)
+static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -651,15 +649,92 @@ static void ulpi_phy_power_off(struct tegra_usb_phy *phy)
val &= ~(USB_PORTSC1_WKOC | USB_PORTSC1_WKDS | USB_PORTSC1_WKCN);
writel(val, base + USB_PORTSC1);

- gpio_direction_output(config->reset_gpio, 0);
clk_disable(phy->clk);
+ return gpio_direction_output(config->reset_gpio, 0);
+}
+
+static int tegra_phy_init(struct usb_phy *x)
+{
+ struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
+ struct tegra_ulpi_config *ulpi_config;
+ int err;
+
+ if (phy_is_ulpi(phy)) {
+ ulpi_config = phy->config;
+ phy->clk = clk_get_sys(NULL, ulpi_config->clk);
+ if (IS_ERR(phy->clk)) {
+ pr_err("%s: can't get ulpi clock\n", __func__);
+ err = -ENXIO;
+ goto err1;
+ }
+ if (!gpio_is_valid(ulpi_config->reset_gpio))
+ ulpi_config->reset_gpio =
+ of_get_named_gpio(phy->dev->of_node,
+ "nvidia,phy-reset-gpio", 0);
+ if (!gpio_is_valid(ulpi_config->reset_gpio)) {
+ pr_err("%s: invalid reset gpio: %d\n", __func__,
+ ulpi_config->reset_gpio);
+ err = -EINVAL;
+ goto err1;
+ }
+ gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
+ gpio_direction_output(ulpi_config->reset_gpio, 0);
+ phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
+ phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
+ } else {
+ err = utmip_pad_open(phy);
+ if (err < 0)
+ goto err1;
+ }
+ return 0;
+err1:
+ clk_disable_unprepare(phy->pll_u);
+ clk_put(phy->pll_u);
+ return err;
+}
+
+static void tegra_usb_phy_close(struct usb_phy *x)
+{
+ struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
+
+ if (phy_is_ulpi(phy))
+ clk_put(phy->clk);
+ else
+ utmip_pad_close(phy);
+ clk_disable_unprepare(phy->pll_u);
+ clk_put(phy->pll_u);
+ kfree(phy);
+}
+
+static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
+{
+ if (phy_is_ulpi(phy))
+ return ulpi_phy_power_on(phy);
+ else
+ return utmi_phy_power_on(phy);
+}
+
+static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
+{
+ if (phy_is_ulpi(phy))
+ return ulpi_phy_power_off(phy);
+ else
+ return utmi_phy_power_off(phy);
+}
+
+static int tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
+{
+ struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
+ if (suspend)
+ return tegra_usb_phy_power_off(phy);
+ else
+ return tegra_usb_phy_power_on(phy);
}

struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode)
{
struct tegra_usb_phy *phy;
- struct tegra_ulpi_config *ulpi_config;
unsigned long parent_rate;
int i;
int err;
@@ -672,6 +747,7 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
phy->regs = regs;
phy->config = config;
phy->mode = phy_mode;
+ phy->dev = dev;

if (!phy->config) {
if (phy_is_ulpi(phy)) {
@@ -704,33 +780,9 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
goto err1;
}

- if (phy_is_ulpi(phy)) {
- ulpi_config = config;
- phy->clk = clk_get_sys(NULL, ulpi_config->clk);
- if (IS_ERR(phy->clk)) {
- pr_err("%s: can't get ulpi clock\n", __func__);
- err = -ENXIO;
- goto err1;
- }
- if (!gpio_is_valid(ulpi_config->reset_gpio))
- ulpi_config->reset_gpio =
- of_get_named_gpio(dev->of_node,
- "nvidia,phy-reset-gpio", 0);
- if (!gpio_is_valid(ulpi_config->reset_gpio)) {
- pr_err("%s: invalid reset gpio: %d\n", __func__,
- ulpi_config->reset_gpio);
- err = -EINVAL;
- goto err1;
- }
- gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
- gpio_direction_output(ulpi_config->reset_gpio, 0);
- phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
- phy->ulpi->io_priv = regs + ULPI_VIEWPORT;
- } else {
- err = utmip_pad_open(phy);
- if (err < 0)
- goto err1;
- }
+ phy->u_phy.init = tegra_phy_init;
+ phy->u_phy.shutdown = tegra_usb_phy_close;
+ phy->u_phy.set_suspend = tegra_usb_phy_suspend;

return phy;

@@ -743,24 +795,6 @@ err0:
}
EXPORT_SYMBOL_GPL(tegra_usb_phy_open);

-int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
-{
- if (phy_is_ulpi(phy))
- return ulpi_phy_power_on(phy);
- else
- return utmi_phy_power_on(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_power_on);
-
-void tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
-{
- if (phy_is_ulpi(phy))
- ulpi_phy_power_off(phy);
- else
- utmi_phy_power_off(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_power_off);
-
void tegra_usb_phy_preresume(struct tegra_usb_phy *phy)
{
if (!phy_is_ulpi(phy))
@@ -803,15 +837,3 @@ void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy)
utmi_phy_clk_enable(phy);
}
EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_enable);
-
-void tegra_usb_phy_close(struct tegra_usb_phy *phy)
-{
- if (phy_is_ulpi(phy))
- clk_put(phy->clk);
- else
- utmip_pad_close(phy);
- clk_disable_unprepare(phy->pll_u);
- clk_put(phy->pll_u);
- kfree(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_close);
diff --git a/arch/arm/mach-tegra/include/mach/usb_phy.h b/include/linux/usb/tegra_usb_phy.h
similarity index 86%
rename from arch/arm/mach-tegra/include/mach/usb_phy.h
rename to include/linux/usb/tegra_usb_phy.h
index 935ce9f..176b1ca 100644
--- a/arch/arm/mach-tegra/include/mach/usb_phy.h
+++ b/include/linux/usb/tegra_usb_phy.h
@@ -1,6 +1,4 @@
/*
- * arch/arm/mach-tegra/include/mach/usb_phy.h
- *
* Copyright (C) 2010 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
@@ -14,8 +12,8 @@
*
*/

-#ifndef __MACH_USB_PHY_H
-#define __MACH_USB_PHY_H
+#ifndef __TEGRA_USB_PHY_H
+#define __TEGRA_USB_PHY_H

#include <linux/clk.h>
#include <linux/usb/otg.h>
@@ -59,19 +57,17 @@ struct tegra_usb_phy {
enum tegra_usb_phy_mode mode;
void *config;
struct usb_phy *ulpi;
+ struct usb_phy u_phy;
+ struct device *dev;
};

struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode);

-int tegra_usb_phy_power_on(struct tegra_usb_phy *phy);
-
void tegra_usb_phy_clk_disable(struct tegra_usb_phy *phy);

void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy);

-void tegra_usb_phy_power_off(struct tegra_usb_phy *phy);
-
void tegra_usb_phy_preresume(struct tegra_usb_phy *phy);

void tegra_usb_phy_postresume(struct tegra_usb_phy *phy);
@@ -81,6 +77,4 @@ void tegra_ehci_phy_restore_start(struct tegra_usb_phy *phy,

void tegra_ehci_phy_restore_end(struct tegra_usb_phy *phy);

-void tegra_usb_phy_close(struct tegra_usb_phy *phy);
-
-#endif /* __MACH_USB_PHY_H */
+#endif /* __TEGRA_USB_PHY_H */
--
1.7.1.1

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