2 * ohci-omap3.c - driver for OHCI on OMAP3 and later processors
4 * Bus Glue for OMAP3 USBHOST 3 port OHCI controller
5 * This controller is also used in later OMAPs and AM35x chips
7 * Copyright (C) 2007-2010 Texas Instruments, Inc.
8 * Author: Vikram Pandita <vikram.pandita@ti.com>
9 * Author: Anand Gadiyar <gadiyar@ti.com>
10 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
12 * Based on ehci-omap.c and some other ohci glue layers
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 * TODO (last updated Feb 27, 2011):
32 #include <linux/platform_device.h>
34 #include <linux/pm_runtime.h>
36 /*-------------------------------------------------------------------------*/
38 static int ohci_omap3_init(struct usb_hcd *hcd)
40 dev_dbg(hcd->self.controller, "starting OHCI controller\n");
42 return ohci_init(hcd_to_ohci(hcd));
45 /*-------------------------------------------------------------------------*/
47 static int ohci_omap3_start(struct usb_hcd *hcd)
49 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
53 * RemoteWakeupConnected has to be set explicitly before
54 * calling ohci_run. The reset value of RWC is 0.
56 ohci->hc_control = OHCI_CTRL_RWC;
57 writel(OHCI_CTRL_RWC, &ohci->regs->control);
62 dev_err(hcd->self.controller, "can't start\n");
69 /*-------------------------------------------------------------------------*/
71 static const struct hc_driver ohci_omap3_hc_driver = {
72 .description = hcd_name,
73 .product_desc = "OMAP3 OHCI Host Controller",
74 .hcd_priv_size = sizeof(struct ohci_hcd),
77 * generic hardware linkage
80 .flags = HCD_USB11 | HCD_MEMORY,
83 * basic lifecycle operations
85 .reset = ohci_omap3_init,
86 .start = ohci_omap3_start,
88 .shutdown = ohci_shutdown,
91 * managing i/o requests and associated device resources
93 .urb_enqueue = ohci_urb_enqueue,
94 .urb_dequeue = ohci_urb_dequeue,
95 .endpoint_disable = ohci_endpoint_disable,
100 .get_frame_number = ohci_get_frame,
105 .hub_status_data = ohci_hub_status_data,
106 .hub_control = ohci_hub_control,
108 .bus_suspend = ohci_bus_suspend,
109 .bus_resume = ohci_bus_resume,
111 .start_port_reset = ohci_start_port_reset,
114 /*-------------------------------------------------------------------------*/
117 * configure so an HC device and id are always provided
118 * always called with process context; sleeping is OK
122 * ohci_hcd_omap3_probe - initialize OMAP-based HCDs
124 * Allocates basic resources for this USB host controller, and
125 * then invokes the start() method for the HCD associated with it
126 * through the hotplug entry's driver_data.
128 static int __devinit ohci_hcd_omap3_probe(struct platform_device *pdev)
130 struct device *dev = &pdev->dev;
131 struct usb_hcd *hcd = NULL;
132 void __iomem *regs = NULL;
133 struct resource *res;
141 dev_err(dev, "Missing parent device\n");
145 irq = platform_get_irq_byname(pdev, "ohci-irq");
147 dev_err(dev, "OHCI irq failed\n");
151 res = platform_get_resource_byname(pdev,
152 IORESOURCE_MEM, "ohci");
154 dev_err(dev, "UHH OHCI get resource failed\n");
158 regs = ioremap(res->start, resource_size(res));
160 dev_err(dev, "UHH OHCI ioremap failed\n");
165 hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev,
168 dev_err(dev, "usb_create_hcd failed\n");
172 hcd->rsrc_start = res->start;
173 hcd->rsrc_len = resource_size(res);
176 pm_runtime_enable(dev);
177 pm_runtime_get_sync(dev);
179 ohci_hcd_init(hcd_to_ohci(hcd));
181 ret = usb_add_hcd(hcd, irq, 0);
183 dev_dbg(dev, "failed to add hcd with err %d\n", ret);
190 pm_runtime_put_sync(dev);
200 * may be called without controller electrically present
201 * may be called with controller, bus, and devices active
205 * ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs
206 * @pdev: USB Host Controller being removed
208 * Reverses the effect of ohci_hcd_omap3_probe(), first invoking
209 * the HCD's stop() method. It is always called from a thread
210 * context, normally "rmmod", "apmd", or something similar.
212 static int __devexit ohci_hcd_omap3_remove(struct platform_device *pdev)
214 struct device *dev = &pdev->dev;
215 struct usb_hcd *hcd = dev_get_drvdata(dev);
219 pm_runtime_put_sync(dev);
220 pm_runtime_disable(dev);
225 static void ohci_hcd_omap3_shutdown(struct platform_device *pdev)
227 struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev);
229 if (hcd->driver->shutdown)
230 hcd->driver->shutdown(hcd);
233 static struct platform_driver ohci_hcd_omap3_driver = {
234 .probe = ohci_hcd_omap3_probe,
235 .remove = ohci_hcd_omap3_remove,
236 .shutdown = ohci_hcd_omap3_shutdown,
238 .name = "ohci-omap3",
242 MODULE_ALIAS("platform:ohci-omap3");
243 MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>");