2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 * (C) Copyright 2002 Hewlett-Packard Company
8 * Bus Glue for Sharp LH7A404
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Rusell King et al.
13 * Modified for LH7A404 from ohci-sa1111.c
14 * by Durgesh Pattamatta <pattamattad@sharpsec.com>
16 * This file is licenced under the GPL.
19 #include <asm/hardware.h>
20 #include <asm/mach-types.h>
21 #include <asm/arch/hardware.h>
24 extern int usb_disabled(void);
26 /*-------------------------------------------------------------------------*/
28 static void lh7a404_start_hc(struct platform_device *dev)
30 printk(KERN_DEBUG __FILE__
31 ": starting LH7A404 OHCI USB Controller\n");
34 * Now, carefully enable the USB clock, and take
35 * the USB host controller out of reset.
37 CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */
39 USBH_CMDSTATUS = OHCI_HCR;
41 printk(KERN_DEBUG __FILE__
42 ": Clock to USB host has been enabled \n");
45 static void lh7a404_stop_hc(struct platform_device *dev)
47 printk(KERN_DEBUG __FILE__
48 ": stopping LH7A404 OHCI USB Controller\n");
50 CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
54 /*-------------------------------------------------------------------------*/
57 static irqreturn_t usb_hcd_lh7a404_hcim_irq (int irq, void *__hcd,
60 struct usb_hcd *hcd = __hcd;
62 return usb_hcd_irq(irq, hcd, r);
65 /*-------------------------------------------------------------------------*/
67 void usb_hcd_lh7a404_remove (struct usb_hcd *, struct platform_device *);
69 /* configure so an HC device and id are always provided */
70 /* always called with process context; sleeping is OK */
74 * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
75 * Context: !in_interrupt()
77 * Allocates basic resources for this USB host controller, and
78 * then invokes the start() method for the HCD associated with it
79 * through the hotplug entry's driver_data.
82 int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
83 struct usb_hcd **hcd_out,
84 struct platform_device *dev)
87 struct usb_hcd *hcd = 0;
89 unsigned int *addr = NULL;
91 if (!request_mem_region(dev->resource[0].start,
93 - dev->resource[0].start + 1, hcd_name)) {
94 pr_debug("request_mem_region failed");
99 lh7a404_start_hc(dev);
101 addr = ioremap(dev->resource[0].start,
103 - dev->resource[0].start + 1);
105 pr_debug("ioremap failed");
110 if(dev->resource[1].flags != IORESOURCE_IRQ){
111 pr_debug ("resource[1] is not IORESOURCE_IRQ");
117 hcd = usb_create_hcd (driver);
119 pr_debug ("hcd_alloc failed");
123 ohci_hcd_init(hcd_to_ohci(hcd));
125 hcd->irq = dev->resource[1].start;
127 hcd->self.controller = &dev->dev;
129 retval = hcd_buffer_create (hcd);
131 pr_debug ("pool alloc fail");
135 retval = request_irq (hcd->irq, usb_hcd_lh7a404_hcim_irq, SA_INTERRUPT,
136 hcd->driver->description, hcd);
138 pr_debug("request_irq failed");
143 pr_debug ("%s (LH7A404) at 0x%p, irq %d",
144 hcd->driver->description, hcd->regs, hcd->irq);
146 hcd->self.bus_name = "lh7a404";
147 usb_register_bus (&hcd->self);
149 if ((retval = driver->start (hcd)) < 0)
151 usb_hcd_lh7a404_remove(hcd, dev);
159 hcd_buffer_destroy (hcd);
163 lh7a404_stop_hc(dev);
164 release_mem_region(dev->resource[0].start,
166 - dev->resource[0].start + 1);
171 /* may be called without controller electrically present */
172 /* may be called with controller, bus, and devices active */
175 * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
176 * @dev: USB Host Controller being removed
177 * Context: !in_interrupt()
179 * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
180 * the HCD's stop() method. It is always called from a thread
181 * context, normally "rmmod", "apmd", or something similar.
184 void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev)
186 pr_debug ("remove: %s, state %x", hcd->self.bus_name, hcd->state);
191 hcd->state = USB_STATE_QUIESCING;
193 pr_debug ("%s: roothub graceful disconnect", hcd->self.bus_name);
194 usb_disconnect (&hcd->self.root_hub);
196 hcd->driver->stop (hcd);
197 hcd->state = USB_STATE_HALT;
199 free_irq (hcd->irq, hcd);
200 hcd_buffer_destroy (hcd);
202 usb_deregister_bus (&hcd->self);
204 lh7a404_stop_hc(dev);
205 release_mem_region(dev->resource[0].start,
207 - dev->resource[0].start + 1);
210 /*-------------------------------------------------------------------------*/
213 ohci_lh7a404_start (struct usb_hcd *hcd)
215 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
218 ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
219 if ((ret = ohci_init(ohci)) < 0)
222 if ((ret = ohci_run (ohci)) < 0) {
223 err ("can't start %s", hcd->self.bus_name);
230 /*-------------------------------------------------------------------------*/
232 static const struct hc_driver ohci_lh7a404_hc_driver = {
233 .description = hcd_name,
234 .product_desc = "LH7A404 OHCI",
235 .hcd_priv_size = sizeof(struct ohci_hcd),
238 * generic hardware linkage
244 * basic lifecycle operations
246 .start = ohci_lh7a404_start,
248 /* suspend: ohci_lh7a404_suspend, -- tbd */
249 /* resume: ohci_lh7a404_resume, -- tbd */
254 * managing i/o requests and associated device resources
256 .urb_enqueue = ohci_urb_enqueue,
257 .urb_dequeue = ohci_urb_dequeue,
258 .endpoint_disable = ohci_endpoint_disable,
263 .get_frame_number = ohci_get_frame,
268 .hub_status_data = ohci_hub_status_data,
269 .hub_control = ohci_hub_control,
272 /*-------------------------------------------------------------------------*/
274 static int ohci_hcd_lh7a404_drv_probe(struct device *dev)
276 struct platform_device *pdev = to_platform_device(dev);
277 struct usb_hcd *hcd = NULL;
280 pr_debug ("In ohci_hcd_lh7a404_drv_probe");
285 ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, &hcd, pdev);
288 dev_set_drvdata(dev, hcd);
293 static int ohci_hcd_lh7a404_drv_remove(struct device *dev)
295 struct platform_device *pdev = to_platform_device(dev);
296 struct usb_hcd *hcd = dev_get_drvdata(dev);
298 usb_hcd_lh7a404_remove(hcd, pdev);
299 dev_set_drvdata(dev, NULL);
303 /*static int ohci_hcd_lh7a404_drv_suspend(struct device *dev)
305 struct platform_device *pdev = to_platform_device(dev);
306 struct usb_hcd *hcd = dev_get_drvdata(dev);
310 static int ohci_hcd_lh7a404_drv_resume(struct device *dev)
312 struct platform_device *pdev = to_platform_device(dev);
313 struct usb_hcd *hcd = dev_get_drvdata(dev);
320 static struct device_driver ohci_hcd_lh7a404_driver = {
321 .name = "lh7a404-ohci",
322 .bus = &platform_bus_type,
323 .probe = ohci_hcd_lh7a404_drv_probe,
324 .remove = ohci_hcd_lh7a404_drv_remove,
325 /*.suspend = ohci_hcd_lh7a404_drv_suspend, */
326 /*.resume = ohci_hcd_lh7a404_drv_resume, */
329 static int __init ohci_hcd_lh7a404_init (void)
331 pr_debug (DRIVER_INFO " (LH7A404)");
332 pr_debug ("block sizes: ed %d td %d\n",
333 sizeof (struct ed), sizeof (struct td));
335 return driver_register(&ohci_hcd_lh7a404_driver);
338 static void __exit ohci_hcd_lh7a404_cleanup (void)
340 driver_unregister(&ohci_hcd_lh7a404_driver);
343 module_init (ohci_hcd_lh7a404_init);
344 module_exit (ohci_hcd_lh7a404_cleanup);