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>
33 #include <linux/pm_runtime.h>
35 /*-------------------------------------------------------------------------*/
37 static int ohci_omap3_init(struct usb_hcd *hcd)
39 dev_dbg(hcd->self.controller, "starting OHCI controller\n");
41 return ohci_init(hcd_to_ohci(hcd));
44 /*-------------------------------------------------------------------------*/
46 static int ohci_omap3_start(struct usb_hcd *hcd)
48 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
52 * RemoteWakeupConnected has to be set explicitly before
53 * calling ohci_run. The reset value of RWC is 0.
55 ohci->hc_control = OHCI_CTRL_RWC;
56 writel(OHCI_CTRL_RWC, &ohci->regs->control);
61 dev_err(hcd->self.controller, "can't start\n");
68 /*-------------------------------------------------------------------------*/
70 static const struct hc_driver ohci_omap3_hc_driver = {
71 .description = hcd_name,
72 .product_desc = "OMAP3 OHCI Host Controller",
73 .hcd_priv_size = sizeof(struct ohci_hcd),
76 * generic hardware linkage
79 .flags = HCD_USB11 | HCD_MEMORY,
82 * basic lifecycle operations
84 .reset = ohci_omap3_init,
85 .start = ohci_omap3_start,
87 .shutdown = ohci_shutdown,
90 * managing i/o requests and associated device resources
92 .urb_enqueue = ohci_urb_enqueue,
93 .urb_dequeue = ohci_urb_dequeue,
94 .endpoint_disable = ohci_endpoint_disable,
99 .get_frame_number = ohci_get_frame,
104 .hub_status_data = ohci_hub_status_data,
105 .hub_control = ohci_hub_control,
107 .bus_suspend = ohci_bus_suspend,
108 .bus_resume = ohci_bus_resume,
110 .start_port_reset = ohci_start_port_reset,
113 /*-------------------------------------------------------------------------*/
116 * configure so an HC device and id are always provided
117 * always called with process context; sleeping is OK
121 * ohci_hcd_omap3_probe - initialize OMAP-based HCDs
123 * Allocates basic resources for this USB host controller, and
124 * then invokes the start() method for the HCD associated with it
125 * through the hotplug entry's driver_data.
127 static int ohci_hcd_omap3_probe(struct platform_device *pdev)
129 struct device *dev = &pdev->dev;
130 struct usb_hcd *hcd = NULL;
131 void __iomem *regs = NULL;
132 struct resource *res;
140 dev_err(dev, "Missing parent device\n");
144 irq = platform_get_irq_byname(pdev, "ohci-irq");
146 dev_err(dev, "OHCI irq failed\n");
150 res = platform_get_resource_byname(pdev,
151 IORESOURCE_MEM, "ohci");
153 dev_err(dev, "UHH OHCI get resource failed\n");
157 regs = ioremap(res->start, resource_size(res));
159 dev_err(dev, "UHH OHCI ioremap failed\n");
164 hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev,
167 dev_err(dev, "usb_create_hcd failed\n");
171 hcd->rsrc_start = res->start;
172 hcd->rsrc_len = resource_size(res);
175 pm_runtime_enable(dev);
176 pm_runtime_get_sync(dev);
178 ohci_hcd_init(hcd_to_ohci(hcd));
180 ret = usb_add_hcd(hcd, irq, 0);
182 dev_dbg(dev, "failed to add hcd with err %d\n", ret);
189 pm_runtime_put_sync(dev);
199 * may be called without controller electrically present
200 * may be called with controller, bus, and devices active
204 * ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs
205 * @pdev: USB Host Controller being removed
207 * Reverses the effect of ohci_hcd_omap3_probe(), first invoking
208 * the HCD's stop() method. It is always called from a thread
209 * context, normally "rmmod", "apmd", or something similar.
211 static int ohci_hcd_omap3_remove(struct platform_device *pdev)
213 struct device *dev = &pdev->dev;
214 struct usb_hcd *hcd = dev_get_drvdata(dev);
218 pm_runtime_put_sync(dev);
219 pm_runtime_disable(dev);
224 static void ohci_hcd_omap3_shutdown(struct platform_device *pdev)
226 struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev);
228 if (hcd->driver->shutdown)
229 hcd->driver->shutdown(hcd);
232 static struct platform_driver ohci_hcd_omap3_driver = {
233 .probe = ohci_hcd_omap3_probe,
234 .remove = ohci_hcd_omap3_remove,
235 .shutdown = ohci_hcd_omap3_shutdown,
237 .name = "ohci-omap3",
241 MODULE_ALIAS("platform:ohci-omap3");
242 MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>");