diff options
Diffstat (limited to 'drivers/usb/host/ehci-tegra.c')
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 68 |
1 files changed, 43 insertions, 25 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index 78fa76da332..6fdcb8ad229 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -17,7 +17,6 @@ */ #include <linux/clk.h> -#include <linux/clk/tegra.h> #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/gpio.h> @@ -29,6 +28,7 @@ #include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> +#include <linux/reset.h> #include <linux/slab.h> #include <linux/usb/ehci_def.h> #include <linux/usb/tegra_usb_phy.h> @@ -38,10 +38,6 @@ #include "ehci.h" -#define TEGRA_USB_BASE 0xC5000000 -#define TEGRA_USB2_BASE 0xC5004000 -#define TEGRA_USB3_BASE 0xC5008000 - #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) #define TEGRA_USB_DMA_ALIGN 32 @@ -55,13 +51,10 @@ struct tegra_ehci_soc_config { bool has_hostpc; }; -static int (*orig_hub_control)(struct usb_hcd *hcd, - u16 typeReq, u16 wValue, u16 wIndex, - char *buf, u16 wLength); - struct tegra_ehci_hcd { struct tegra_usb_phy *phy; struct clk *clk; + struct reset_control *rst; int port_resuming; bool needs_double_reset; enum tegra_usb_phy_port_speed port_speed; @@ -239,7 +232,7 @@ static int tegra_ehci_hub_control( spin_unlock_irqrestore(&ehci->lock, flags); /* Handle the hub control events here */ - return orig_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); done: spin_unlock_irqrestore(&ehci->lock, flags); @@ -362,10 +355,9 @@ static int tegra_ehci_probe(struct platform_device *pdev) * Since shared usb code relies on it, set it here for now. * Once we have dma capability bindings this can go away. */ - if (!pdev->dev.dma_mask) - pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; - if (!pdev->dev.coherent_dma_mask) - pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); + err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (err) + return err; hcd = usb_create_hcd(&tegra_ehci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); @@ -386,13 +378,20 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; } + tegra->rst = devm_reset_control_get(&pdev->dev, "usb"); + if (IS_ERR(tegra->rst)) { + dev_err(&pdev->dev, "Can't get ehci reset\n"); + err = PTR_ERR(tegra->rst); + goto cleanup_hcd_create; + } + err = clk_prepare_enable(tegra->clk); if (err) - goto cleanup_clk_get; + goto cleanup_hcd_create; - tegra_periph_reset_assert(tegra->clk); + reset_control_assert(tegra->rst); udelay(1); - tegra_periph_reset_deassert(tegra->clk); + reset_control_deassert(tegra->rst); u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0); if (IS_ERR(u_phy)) { @@ -412,10 +411,9 @@ static int tegra_ehci_probe(struct platform_device *pdev) } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); - hcd->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res)); - if (!hcd->regs) { - dev_err(&pdev->dev, "Failed to remap I/O memory\n"); - err = -ENOMEM; + hcd->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hcd->regs)) { + err = PTR_ERR(hcd->regs); goto cleanup_clk_en; } ehci->caps = hcd->regs + 0x100; @@ -456,6 +454,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Failed to add USB HCD\n"); goto cleanup_otg_set_host; } + device_wakeup_enable(hcd->self.controller); return err; @@ -465,8 +464,6 @@ cleanup_phy: usb_phy_shutdown(hcd->phy); cleanup_clk_en: clk_disable_unprepare(tegra->clk); -cleanup_clk_get: - clk_put(tegra->clk); cleanup_hcd_create: usb_put_hcd(hcd); return err; @@ -507,8 +504,31 @@ static struct platform_driver tegra_ehci_driver = { } }; +static int tegra_ehci_reset(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + int retval; + int txfifothresh; + + retval = ehci_setup(hcd); + if (retval) + return retval; + + /* + * We should really pull this value out of tegra_ehci_soc_config, but + * to avoid needing access to it, make use of the fact that Tegra20 is + * the only one so far that needs a value of 10, and Tegra20 is the + * only one which doesn't set has_hostpc. + */ + txfifothresh = ehci->has_hostpc ? 0x10 : 10; + ehci_writel(ehci, txfifothresh << 16, &ehci->regs->txfill_tuning); + + return 0; +} + static const struct ehci_driver_overrides tegra_overrides __initconst = { .extra_priv_size = sizeof(struct tegra_ehci_hcd), + .reset = tegra_ehci_reset, }; static int __init ehci_tegra_init(void) @@ -529,8 +549,6 @@ static int __init ehci_tegra_init(void) * too easy. */ - orig_hub_control = tegra_ehci_hc_driver.hub_control; - tegra_ehci_hc_driver.map_urb_for_dma = tegra_ehci_map_urb_for_dma; tegra_ehci_hc_driver.unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma; tegra_ehci_hc_driver.hub_control = tegra_ehci_hub_control; |