Rely on platform_data being passed through auxdata for now; more elaborate
bindings for phy config and tunings to be added.
Signed-off-by: Olof Johansson <olof@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
arch/arm/mach-tegra/board-dt.c | 8 +++++
drivers/usb/host/ehci-tegra.c | 62 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-tegra/board-dt.c b/arch/arm/mach-tegra/board-dt.c
index 74743ad..808a12e 100644
--- a/arch/arm/mach-tegra/board-dt.c
+++ b/arch/arm/mach-tegra/board-dt.c
@@ -61,12 +61,20 @@ struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.0", NULL),
OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.1", NULL),
OF_DEV_AUXDATA("nvidia,tegra20-das", TEGRA_APB_MISC_DAS_BASE, "tegra-das", NULL),
+ OF_DEV_AUXDATA("nvidia,tegra20-ehci", TEGRA_USB_BASE, "tegra-ehci.0",
+ &tegra_ehci1_device.dev.platform_data),
+ OF_DEV_AUXDATA("nvidia,tegra20-ehci", TEGRA_USB2_BASE, "tegra-ehci.1",
+ &tegra_ehci2_device.dev.platform_data),
+ OF_DEV_AUXDATA("nvidia,tegra20-ehci", TEGRA_USB3_BASE, "tegra-ehci.2",
+ &tegra_ehci3_device.dev.platform_data),
{}
};
static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
/* name parent rate enabled */
{ "uartd", "pll_p", 216000000, true },
+ { "usbd", "clk_m", 12000000, false },
+ { "usb3", "clk_m", 12000000, false },
{ NULL, NULL, 0, 0},
};
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index db9d1b4..58c3ccc 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -21,7 +21,12 @@
#include <linux/platform_data/tegra_usb.h>
#include <linux/irq.h>
#include <linux/usb/otg.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+
#include <mach/usb_phy.h>
+#include <mach/iomap.h>
#define TEGRA_USB_DMA_ALIGN 32
@@ -574,6 +579,27 @@ static const struct hc_driver tegra_ehci_hc_driver = {
.port_handed_over = ehci_port_handed_over,
};
+static int setup_vbus_gpio(struct platform_device *pdev, int gpio)
+{
+ int err = 0;
+
+ err = gpio_request(gpio, "vbus_gpio");
+ if (err) {
+ dev_err(&pdev->dev, "can't request vbus gpio %d", gpio);
+ return err;
+ }
+ err = gpio_direction_output(gpio, 1);
+ if (err) {
+ dev_err(&pdev->dev, "can't enable vbus\n");
+ return err;
+ }
+ gpio_set_value(gpio, 1);
+
+ return err;
+}
+
+static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32);
+
static int tegra_ehci_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -583,6 +609,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
int err = 0;
int irq;
int instance = pdev->id;
+ int vbus_gpio;
pdata = pdev->dev.platform_data;
if (!pdata) {
@@ -590,6 +617,13 @@ static int tegra_ehci_probe(struct platform_device *pdev)
return -EINVAL;
}
+ if (!pdev->dev.dma_mask)
+ pdev->dev.dma_mask = &tegra_ehci_dma_mask;
+
+ vbus_gpio = of_get_named_gpio(pdev->dev.of_node, "nvidia,vbus-gpio", 0);
+ if (vbus_gpio > 0)
+ setup_vbus_gpio(pdev, vbus_gpio);
+
tegra = kzalloc(sizeof(struct tegra_ehci_hcd), GFP_KERNEL);
if (!tegra)
return -ENOMEM;
@@ -640,6 +674,28 @@ static int tegra_ehci_probe(struct platform_device *pdev)
goto fail_io;
}
+ /* This is pretty ugly and needs to be fixed when we do only
+ * device-tree probing. Old code relies on the platform_device
+ * numbering that we lack for device-tree-instantiated devices.
+ */
+ if (instance < 0) {
+ switch (res->start) {
+ case TEGRA_USB_BASE:
+ instance = 0;
+ break;
+ case TEGRA_USB2_BASE:
+ instance = 1;
+ break;
+ case TEGRA_USB3_BASE:
+ instance = 2;
+ break;
+ default:
+ err = -ENODEV;
+ dev_err(&pdev->dev, "unknown usb instance\n");
+ goto fail_phy;
+ }
+ }
+
tegra->phy = tegra_usb_phy_open(instance, hcd->regs, pdata->phy_config,
TEGRA_USB_PHY_MODE_HOST);
if (IS_ERR(tegra->phy)) {
@@ -773,6 +829,11 @@ static void tegra_ehci_hcd_shutdown(struct platform_device *pdev)
hcd->driver->shutdown(hcd);
}
+static struct of_device_id tegra_ehci_of_match[] __devinitdata = {
+ { .compatible = "nvidia,tegra20-ehci", },
+ { },
+};
+
static struct platform_driver tegra_ehci_driver = {
.probe = tegra_ehci_probe,
.remove = tegra_ehci_remove,
@@ -783,5 +844,6 @@ static struct platform_driver tegra_ehci_driver = {
.shutdown = tegra_ehci_hcd_shutdown,
.driver = {
.name = "tegra-ehci",
+ .of_match_table = tegra_ehci_of_match,
}
};
--
1.7.4.1
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
