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path: root/drivers/usb/host/ehci-tegra.c
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Diffstat (limited to 'drivers/usb/host/ehci-tegra.c')
-rw-r--r--drivers/usb/host/ehci-tegra.c104
1 files changed, 45 insertions, 59 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index d64199044b4a..8390c870299a 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -611,7 +611,7 @@ static const struct dev_pm_ops tegra_ehci_pm_ops = {
/* Bits of PORTSC1, which will get cleared by writing 1 into them */
#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
-static void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
+void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
{
unsigned long val;
struct usb_hcd *hcd = bus_to_hcd(x->otg->host);
@@ -622,8 +622,9 @@ static void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
val |= TEGRA_USB_PORTSC1_PTS(pts_val & 3);
writel(val, base + TEGRA_USB_PORTSC1);
}
+EXPORT_SYMBOL_GPL(tegra_ehci_set_pts);
-static void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
+void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
{
unsigned long val;
struct usb_hcd *hcd = bus_to_hcd(x->otg->host);
@@ -636,6 +637,7 @@ static void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
val &= ~TEGRA_USB_PORTSC1_PHCD;
writel(val, base + TEGRA_USB_PORTSC1);
}
+EXPORT_SYMBOL_GPL(tegra_ehci_set_phcd);
static int tegra_ehci_probe(struct platform_device *pdev)
{
@@ -645,7 +647,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
struct tegra_ehci_platform_data *pdata;
int err = 0;
int irq;
- int instance = pdev->id;
+ struct device_node *np_phy;
struct usb_phy *u_phy;
pdata = pdev->dev.platform_data;
@@ -670,38 +672,49 @@ static int tegra_ehci_probe(struct platform_device *pdev)
if (!tegra)
return -ENOMEM;
- hcd = usb_create_hcd(&tegra_ehci_hc_driver, &pdev->dev,
- dev_name(&pdev->dev));
- if (!hcd) {
- dev_err(&pdev->dev, "Unable to create HCD\n");
- return -ENOMEM;
- }
-
- platform_set_drvdata(pdev, tegra);
-
tegra->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(tegra->clk)) {
dev_err(&pdev->dev, "Can't get ehci clock\n");
- err = PTR_ERR(tegra->clk);
- goto fail_clk;
+ return PTR_ERR(tegra->clk);
}
err = clk_prepare_enable(tegra->clk);
if (err)
- goto fail_clk;
+ return err;
tegra_periph_reset_assert(tegra->clk);
udelay(1);
tegra_periph_reset_deassert(tegra->clk);
+ np_phy = of_parse_phandle(pdev->dev.of_node, "nvidia,phy", 0);
+ if (!np_phy) {
+ err = -ENODEV;
+ goto cleanup_clk;
+ }
+
+ u_phy = tegra_usb_get_phy(np_phy);
+ if (IS_ERR(u_phy)) {
+ err = PTR_ERR(u_phy);
+ goto cleanup_clk;
+ }
+
tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node,
"nvidia,needs-double-reset");
+ hcd = usb_create_hcd(&tegra_ehci_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd) {
+ dev_err(&pdev->dev, "Unable to create HCD\n");
+ err = -ENOMEM;
+ goto cleanup_clk;
+ }
+ hcd->phy = u_phy;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Failed to get I/O memory\n");
err = -ENXIO;
- goto fail_io;
+ goto cleanup_hcd_create;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
@@ -709,57 +722,28 @@ static int tegra_ehci_probe(struct platform_device *pdev)
if (!hcd->regs) {
dev_err(&pdev->dev, "Failed to remap I/O memory\n");
err = -ENOMEM;
- 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_io;
- }
+ goto cleanup_hcd_create;
}
- tegra->phy = tegra_usb_phy_open(&pdev->dev, instance, hcd->regs,
- pdata->phy_config,
- tegra_ehci_set_pts,
- tegra_ehci_set_phcd);
- if (IS_ERR(tegra->phy)) {
- dev_err(&pdev->dev, "Failed to open USB phy\n");
- err = -ENXIO;
- goto fail_io;
+ err = usb_phy_init(hcd->phy);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize phy\n");
+ goto cleanup_hcd_create;
}
- hcd->phy = u_phy = &tegra->phy->u_phy;
- usb_phy_init(hcd->phy);
-
u_phy->otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
GFP_KERNEL);
if (!u_phy->otg) {
dev_err(&pdev->dev, "Failed to alloc memory for otg\n");
err = -ENOMEM;
- goto fail_io;
+ goto cleanup_phy;
}
u_phy->otg->host = hcd_to_bus(hcd);
err = usb_phy_set_suspend(hcd->phy, 0);
if (err) {
dev_err(&pdev->dev, "Failed to power on the phy\n");
- goto fail_phy;
+ goto cleanup_phy;
}
tegra->host_resumed = 1;
@@ -769,7 +753,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
if (!irq) {
dev_err(&pdev->dev, "Failed to get IRQ\n");
err = -ENODEV;
- goto fail_phy;
+ goto cleanup_phy;
}
if (pdata->operating_mode == TEGRA_USB_OTG) {
@@ -781,10 +765,12 @@ static int tegra_ehci_probe(struct platform_device *pdev)
tegra->transceiver = ERR_PTR(-ENODEV);
}
+ platform_set_drvdata(pdev, tegra);
+
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err) {
dev_err(&pdev->dev, "Failed to add USB HCD\n");
- goto fail;
+ goto cleanup_phy;
}
pm_runtime_set_active(&pdev->dev);
@@ -797,15 +783,15 @@ static int tegra_ehci_probe(struct platform_device *pdev)
pm_runtime_put_sync(&pdev->dev);
return err;
-fail:
+cleanup_phy:
if (!IS_ERR(tegra->transceiver))
otg_set_host(tegra->transceiver->otg, NULL);
-fail_phy:
+
usb_phy_shutdown(hcd->phy);
-fail_io:
- clk_disable_unprepare(tegra->clk);
-fail_clk:
+cleanup_hcd_create:
usb_put_hcd(hcd);
+cleanup_clk:
+ clk_disable_unprepare(tegra->clk);
return err;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 10:16:52 +0000