diff options
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-omap.c | 5 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 87 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-plat.c | 31 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 3 |
5 files changed, 66 insertions, 64 deletions
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 5d958da8e1bc..9f0aeb068acb 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -234,9 +234,7 @@ config USB_EHCI_TEGRA tristate "NVIDIA Tegra HCD support" depends on ARCH_TEGRA select USB_EHCI_ROOT_HUB_TT - select USB_PHY - select USB_ULPI - select USB_ULPI_VIEWPORT + select USB_TEGRA_PHY help This driver enables support for the internal USB Host Controllers found in NVIDIA Tegra SoCs. The controllers are EHCI compliant. diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c index 8d8bafc70c1f..7e4c13346a1e 100644 --- a/drivers/usb/host/ehci-omap.c +++ b/drivers/usb/host/ehci-omap.c @@ -157,10 +157,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) struct usb_phy *phy; /* get the PHY device */ - if (dev->of_node) - phy = devm_usb_get_phy_by_phandle(dev, "phys", i); - else - phy = devm_usb_get_phy_dev(dev, i); + phy = devm_usb_get_phy_by_phandle(dev, "phys", i); if (IS_ERR(phy)) { /* Don't bail out if PHY is not absolutely necessary */ if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index a6f4389f7e88..4d2cdec4cb78 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -36,7 +36,6 @@ #define DRV_NAME "tegra-ehci" static struct hc_driver __read_mostly tegra_ehci_hc_driver; -static bool usb1_reset_attempted; struct tegra_ehci_soc_config { bool has_hostpc; @@ -51,67 +50,54 @@ struct tegra_ehci_hcd { enum tegra_usb_phy_port_speed port_speed; }; -/* - * The 1st USB controller contains some UTMI pad registers that are global for - * all the controllers on the chip. Those registers are also cleared when - * reset is asserted to the 1st controller. This means that the 1st controller - * can only be reset when no other controlled has finished probing. So we'll - * reset the 1st controller before doing any other setup on any of the - * controllers, and then never again. - * - * Since this is a PHY issue, the Tegra PHY driver should probably be doing - * the resetting of the USB controllers. But to keep compatibility with old - * device trees that don't have reset phandles in the PHYs, do it here. - * Those old DTs will be vulnerable to total USB breakage if the 1st EHCI - * device isn't the first one to finish probing, so warn them. - */ static int tegra_reset_usb_controller(struct platform_device *pdev) { struct device_node *phy_np; struct usb_hcd *hcd = platform_get_drvdata(pdev); struct tegra_ehci_hcd *tegra = (struct tegra_ehci_hcd *)hcd_to_ehci(hcd)->priv; - bool has_utmi_pad_registers = false; + struct reset_control *rst; + int err; phy_np = of_parse_phandle(pdev->dev.of_node, "nvidia,phy", 0); if (!phy_np) return -ENOENT; - if (of_property_read_bool(phy_np, "nvidia,has-utmi-pad-registers")) - has_utmi_pad_registers = true; + /* + * The 1st USB controller contains some UTMI pad registers that are + * global for all the controllers on the chip. Those registers are + * also cleared when reset is asserted to the 1st controller. + */ + rst = of_reset_control_get_shared(phy_np, "utmi-pads"); + if (IS_ERR(rst)) { + dev_warn(&pdev->dev, + "can't get utmi-pads reset from the PHY\n"); + dev_warn(&pdev->dev, + "continuing, but please update your DT\n"); + } else { + /* + * PHY driver performs UTMI-pads reset in a case of + * non-legacy DT. + */ + reset_control_put(rst); + } - if (!usb1_reset_attempted) { - struct reset_control *usb1_reset; + of_node_put(phy_np); - if (!has_utmi_pad_registers) - usb1_reset = of_reset_control_get(phy_np, "utmi-pads"); - else - usb1_reset = tegra->rst; - - if (IS_ERR(usb1_reset)) { - dev_warn(&pdev->dev, - "can't get utmi-pads reset from the PHY\n"); - dev_warn(&pdev->dev, - "continuing, but please update your DT\n"); - } else { - reset_control_assert(usb1_reset); - udelay(1); - reset_control_deassert(usb1_reset); - - if (!has_utmi_pad_registers) - reset_control_put(usb1_reset); - } + /* reset control is shared, hence initialize it first */ + err = reset_control_deassert(tegra->rst); + if (err) + return err; - usb1_reset_attempted = true; - } + err = reset_control_assert(tegra->rst); + if (err) + return err; - if (!has_utmi_pad_registers) { - reset_control_assert(tegra->rst); - udelay(1); - reset_control_deassert(tegra->rst); - } + udelay(1); - of_node_put(phy_np); + err = reset_control_deassert(tegra->rst); + if (err) + return err; return 0; } @@ -440,7 +426,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; } - tegra->rst = devm_reset_control_get(&pdev->dev, "usb"); + tegra->rst = devm_reset_control_get_shared(&pdev->dev, "usb"); if (IS_ERR(tegra->rst)) { dev_err(&pdev->dev, "Can't get ehci reset\n"); err = PTR_ERR(tegra->rst); @@ -452,8 +438,10 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; err = tegra_reset_usb_controller(pdev); - if (err) + if (err) { + dev_err(&pdev->dev, "Failed to reset controller\n"); goto cleanup_clk_en; + } u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0); if (IS_ERR(u_phy)) { @@ -538,6 +526,9 @@ static int tegra_ehci_remove(struct platform_device *pdev) usb_phy_shutdown(hcd->usb_phy); usb_remove_hcd(hcd); + reset_control_assert(tegra->rst); + udelay(1); + clk_disable_unprepare(tegra->clk); usb_put_hcd(hcd); diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index df327dcc2bac..596e7a71b666 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -157,6 +157,7 @@ static int xhci_plat_probe(struct platform_device *pdev) struct resource *res; struct usb_hcd *hcd; struct clk *clk; + struct clk *reg_clk; int ret; int irq; @@ -226,17 +227,27 @@ static int xhci_plat_probe(struct platform_device *pdev) hcd->rsrc_len = resource_size(res); /* - * Not all platforms have a clk so it is not an error if the - * clock does not exists. + * Not all platforms have clks so it is not an error if the + * clock do not exist. */ + reg_clk = devm_clk_get(&pdev->dev, "reg"); + if (!IS_ERR(reg_clk)) { + ret = clk_prepare_enable(reg_clk); + if (ret) + goto put_hcd; + } else if (PTR_ERR(reg_clk) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto put_hcd; + } + clk = devm_clk_get(&pdev->dev, NULL); if (!IS_ERR(clk)) { ret = clk_prepare_enable(clk); if (ret) - goto put_hcd; + goto disable_reg_clk; } else if (PTR_ERR(clk) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; - goto put_hcd; + goto disable_reg_clk; } xhci = hcd_to_xhci(hcd); @@ -252,6 +263,7 @@ static int xhci_plat_probe(struct platform_device *pdev) device_wakeup_enable(hcd->self.controller); xhci->clk = clk; + xhci->reg_clk = reg_clk; xhci->main_hcd = hcd; xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev, dev_name(&pdev->dev), hcd); @@ -320,8 +332,10 @@ put_usb3_hcd: usb_put_hcd(xhci->shared_hcd); disable_clk: - if (!IS_ERR(clk)) - clk_disable_unprepare(clk); + clk_disable_unprepare(clk); + +disable_reg_clk: + clk_disable_unprepare(reg_clk); put_hcd: usb_put_hcd(hcd); @@ -338,6 +352,7 @@ static int xhci_plat_remove(struct platform_device *dev) struct usb_hcd *hcd = platform_get_drvdata(dev); struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct clk *clk = xhci->clk; + struct clk *reg_clk = xhci->reg_clk; xhci->xhc_state |= XHCI_STATE_REMOVING; @@ -347,8 +362,8 @@ static int xhci_plat_remove(struct platform_device *dev) usb_remove_hcd(hcd); usb_put_hcd(xhci->shared_hcd); - if (!IS_ERR(clk)) - clk_disable_unprepare(clk); + clk_disable_unprepare(clk); + clk_disable_unprepare(reg_clk); usb_put_hcd(hcd); pm_runtime_set_suspended(&dev->dev); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 05c909b04f14..6dfc4867dbcf 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1729,8 +1729,9 @@ struct xhci_hcd { int page_shift; /* msi-x vectors */ int msix_count; - /* optional clock */ + /* optional clocks */ struct clk *clk; + struct clk *reg_clk; /* data structures */ struct xhci_device_context_array *dcbaa; struct xhci_ring *cmd_ring; |