| /* ehci-msm.c - HSUSB Host Controller Driver Implementation |
| * |
| * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved. |
| * |
| * Partly derived from ehci-fsl.c and ehci-hcd.c |
| * Copyright (c) 2000-2004 by David Brownell |
| * Copyright (c) 2005 MontaVista Software |
| * |
| * All source code in this file is licensed under the following license except |
| * where indicated. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * See the GNU General Public License for more details. |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can find it at http://www.fsf.org |
| */ |
| |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <linux/usb/otg.h> |
| #include <linux/usb/msm_hsusb_hw.h> |
| |
| #define MSM_USB_BASE (hcd->regs) |
| |
| static struct usb_phy *phy; |
| |
| static int ehci_msm_reset(struct usb_hcd *hcd) |
| { |
| struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| int retval; |
| |
| ehci->caps = USB_CAPLENGTH; |
| hcd->has_tt = 1; |
| |
| retval = ehci_setup(hcd); |
| if (retval) |
| return retval; |
| |
| /* bursts of unspecified length. */ |
| writel(0, USB_AHBBURST); |
| /* Use the AHB transactor */ |
| writel(0, USB_AHBMODE); |
| /* Disable streaming mode and select host mode */ |
| writel(0x13, USB_USBMODE); |
| |
| ehci_port_power(ehci, 1); |
| return 0; |
| } |
| |
| static struct hc_driver msm_hc_driver = { |
| .description = hcd_name, |
| .product_desc = "Qualcomm On-Chip EHCI Host Controller", |
| .hcd_priv_size = sizeof(struct ehci_hcd), |
| |
| /* |
| * generic hardware linkage |
| */ |
| .irq = ehci_irq, |
| .flags = HCD_USB2 | HCD_MEMORY, |
| |
| .reset = ehci_msm_reset, |
| .start = ehci_run, |
| |
| .stop = ehci_stop, |
| .shutdown = ehci_shutdown, |
| |
| /* |
| * managing i/o requests and associated device resources |
| */ |
| .urb_enqueue = ehci_urb_enqueue, |
| .urb_dequeue = ehci_urb_dequeue, |
| .endpoint_disable = ehci_endpoint_disable, |
| .endpoint_reset = ehci_endpoint_reset, |
| .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| |
| /* |
| * scheduling support |
| */ |
| .get_frame_number = ehci_get_frame, |
| |
| /* |
| * root hub support |
| */ |
| .hub_status_data = ehci_hub_status_data, |
| .hub_control = ehci_hub_control, |
| .relinquish_port = ehci_relinquish_port, |
| .port_handed_over = ehci_port_handed_over, |
| |
| /* |
| * PM support |
| */ |
| .bus_suspend = ehci_bus_suspend, |
| .bus_resume = ehci_bus_resume, |
| }; |
| |
| static int ehci_msm_probe(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd; |
| struct resource *res; |
| int ret; |
| |
| dev_dbg(&pdev->dev, "ehci_msm proble\n"); |
| |
| hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
| if (!hcd) { |
| dev_err(&pdev->dev, "Unable to create HCD\n"); |
| return -ENOMEM; |
| } |
| |
| hcd->irq = platform_get_irq(pdev, 0); |
| if (hcd->irq < 0) { |
| dev_err(&pdev->dev, "Unable to get IRQ resource\n"); |
| ret = hcd->irq; |
| goto put_hcd; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) { |
| dev_err(&pdev->dev, "Unable to get memory resource\n"); |
| ret = -ENODEV; |
| goto put_hcd; |
| } |
| |
| hcd->rsrc_start = res->start; |
| hcd->rsrc_len = resource_size(res); |
| hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| if (!hcd->regs) { |
| dev_err(&pdev->dev, "ioremap failed\n"); |
| ret = -ENOMEM; |
| goto put_hcd; |
| } |
| |
| /* |
| * OTG driver takes care of PHY initialization, clock management, |
| * powering up VBUS, mapping of registers address space and power |
| * management. |
| */ |
| phy = usb_get_phy(USB_PHY_TYPE_USB2); |
| if (IS_ERR_OR_NULL(phy)) { |
| dev_err(&pdev->dev, "unable to find transceiver\n"); |
| ret = -ENODEV; |
| goto unmap; |
| } |
| |
| ret = otg_set_host(phy->otg, &hcd->self); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "unable to register with transceiver\n"); |
| goto put_transceiver; |
| } |
| |
| device_init_wakeup(&pdev->dev, 1); |
| /* |
| * OTG device parent of HCD takes care of putting |
| * hardware into low power mode. |
| */ |
| pm_runtime_no_callbacks(&pdev->dev); |
| pm_runtime_enable(&pdev->dev); |
| |
| return 0; |
| |
| put_transceiver: |
| usb_put_phy(phy); |
| unmap: |
| iounmap(hcd->regs); |
| put_hcd: |
| usb_put_hcd(hcd); |
| |
| return ret; |
| } |
| |
| static int __devexit ehci_msm_remove(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| |
| device_init_wakeup(&pdev->dev, 0); |
| pm_runtime_disable(&pdev->dev); |
| pm_runtime_set_suspended(&pdev->dev); |
| |
| otg_set_host(phy->otg, NULL); |
| usb_put_phy(phy); |
| |
| usb_put_hcd(hcd); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int ehci_msm_pm_suspend(struct device *dev) |
| { |
| struct usb_hcd *hcd = dev_get_drvdata(dev); |
| bool do_wakeup = device_may_wakeup(dev); |
| |
| dev_dbg(dev, "ehci-msm PM suspend\n"); |
| |
| return ehci_suspend(hcd, do_wakeup); |
| } |
| |
| static int ehci_msm_pm_resume(struct device *dev) |
| { |
| struct usb_hcd *hcd = dev_get_drvdata(dev); |
| |
| dev_dbg(dev, "ehci-msm PM resume\n"); |
| ehci_resume(hcd, false); |
| |
| return 0; |
| } |
| #else |
| #define ehci_msm_pm_suspend NULL |
| #define ehci_msm_pm_resume NULL |
| #endif |
| |
| static const struct dev_pm_ops ehci_msm_dev_pm_ops = { |
| .suspend = ehci_msm_pm_suspend, |
| .resume = ehci_msm_pm_resume, |
| }; |
| |
| static struct platform_driver ehci_msm_driver = { |
| .probe = ehci_msm_probe, |
| .remove = __devexit_p(ehci_msm_remove), |
| .driver = { |
| .name = "msm_hsusb_host", |
| .pm = &ehci_msm_dev_pm_ops, |
| }, |
| }; |