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
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Russell King et al.
13 * Modified for LH7A404 from ohci-sa1111.c
14 * by Durgesh Pattamatta <pattamattad@sharpsec.com>
16 * Modified for pxa27x from ohci-lh7a404.c
17 * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
19 * This file is licenced under the GPL.
22 #include <linux/device.h>
23 #include <asm/mach-types.h>
24 #include <asm/hardware.h>
25 #include <asm/arch/pxa-regs.h>
28 #define PMM_NPS_MODE 1
29 #define PMM_GLOBAL_MODE 2
30 #define PMM_PERPORT_MODE 3
32 #define PXA_UHC_MAX_PORTNUM 3
34 #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 )
36 static int pxa27x_ohci_pmm_state;
39 PMM_NPS_MODE -- PMM Non-power switching mode
40 Ports are powered continuously.
42 PMM_GLOBAL_MODE -- PMM global switching mode
43 All ports are powered at the same time.
45 PMM_PERPORT_MODE -- PMM per port switching mode
46 Ports are powered individually.
48 static int pxa27x_ohci_select_pmm( int mode )
50 pxa27x_ohci_pmm_state = mode;
57 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
59 case PMM_PERPORT_MODE:
60 UHCRHDA &= ~(RH_A_NPS);
63 /* Set port power control mask bits, only 3 ports. */
68 "Invalid mode %d, set to non-power switch mode.\n",
71 pxa27x_ohci_pmm_state = PMM_NPS_MODE;
79 If you select PMM_PERPORT_MODE, you should set the port power
81 static int pxa27x_ohci_set_port_power( int port )
83 if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE)
84 && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) {
85 UHCRHPS(port) |= 0x100;
92 If you select PMM_PERPORT_MODE, you should set the port power
94 static int pxa27x_ohci_clear_port_power( int port )
96 if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE)
97 && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) {
98 UHCRHPS(port) |= 0x200;
105 extern int usb_disabled(void);
107 /*-------------------------------------------------------------------------*/
109 static void pxa27x_start_hc(struct platform_device *dev)
111 pxa_set_cken(CKEN10_USBHOST, 1);
117 UHCHR |= UHCHR_FSBIR;
118 while (UHCHR & UHCHR_FSBIR)
121 /* This could be properly abstracted away through the
122 device data the day more machines are supported and
123 their differences can be figured out correctly. */
124 if (machine_is_mainstone()) {
125 /* setup Port1 GPIO pin. */
126 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */
127 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
129 /* Set the Power Control Polarity Low and Power Sense
130 Polarity Low to active low. Supply power to USB ports. */
131 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
132 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
137 UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
140 static void pxa27x_stop_hc(struct platform_device *dev)
149 pxa_set_cken(CKEN10_USBHOST, 0);
153 /*-------------------------------------------------------------------------*/
155 /* configure so an HC device and id are always provided */
156 /* always called with process context; sleeping is OK */
160 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
161 * Context: !in_interrupt()
163 * Allocates basic resources for this USB host controller, and
164 * then invokes the start() method for the HCD associated with it
165 * through the hotplug entry's driver_data.
168 int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
169 struct platform_device *dev)
174 if (dev->resource[1].flags != IORESOURCE_IRQ) {
175 pr_debug ("resource[1] is not IORESOURCE_IRQ");
179 hcd = usb_create_hcd (driver, &dev->dev, "pxa27x");
182 hcd->rsrc_start = dev->resource[0].start;
183 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
185 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
186 pr_debug("request_mem_region failed");
191 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
193 pr_debug("ioremap failed");
198 pxa27x_start_hc(dev);
200 /* Select Power Management Mode */
201 pxa27x_ohci_select_pmm( PMM_PERPORT_MODE );
203 /* If choosing PMM_PERPORT_MODE, we should set the port power before we use it. */
204 if (pxa27x_ohci_set_port_power(1) < 0)
205 printk(KERN_ERR "Setting port 1 power failed.\n");
207 if (pxa27x_ohci_clear_port_power(2) < 0)
208 printk(KERN_ERR "Setting port 2 power failed.\n");
210 if (pxa27x_ohci_clear_port_power(3) < 0)
211 printk(KERN_ERR "Setting port 3 power failed.\n");
213 ohci_hcd_init(hcd_to_ohci(hcd));
215 retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
222 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
229 /* may be called without controller electrically present */
230 /* may be called with controller, bus, and devices active */
233 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
234 * @dev: USB Host Controller being removed
235 * Context: !in_interrupt()
237 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
238 * the HCD's stop() method. It is always called from a thread
239 * context, normally "rmmod", "apmd", or something similar.
242 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
247 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
251 /*-------------------------------------------------------------------------*/
254 ohci_pxa27x_start (struct usb_hcd *hcd)
256 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
259 ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
261 if ((ret = ohci_init(ohci)) < 0)
264 if ((ret = ohci_run (ohci)) < 0) {
265 err ("can't start %s", hcd->self.bus_name);
273 /*-------------------------------------------------------------------------*/
275 static const struct hc_driver ohci_pxa27x_hc_driver = {
276 .description = hcd_name,
277 .product_desc = "PXA27x OHCI",
278 .hcd_priv_size = sizeof(struct ohci_hcd),
281 * generic hardware linkage
284 .flags = HCD_USB11 | HCD_MEMORY,
287 * basic lifecycle operations
289 .start = ohci_pxa27x_start,
293 * managing i/o requests and associated device resources
295 .urb_enqueue = ohci_urb_enqueue,
296 .urb_dequeue = ohci_urb_dequeue,
297 .endpoint_disable = ohci_endpoint_disable,
302 .get_frame_number = ohci_get_frame,
307 .hub_status_data = ohci_hub_status_data,
308 .hub_control = ohci_hub_control,
309 #ifdef CONFIG_USB_SUSPEND
310 .hub_suspend = ohci_hub_suspend,
311 .hub_resume = ohci_hub_resume,
315 /*-------------------------------------------------------------------------*/
317 static int ohci_hcd_pxa27x_drv_probe(struct device *dev)
319 struct platform_device *pdev = to_platform_device(dev);
322 pr_debug ("In ohci_hcd_pxa27x_drv_probe");
327 ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
331 static int ohci_hcd_pxa27x_drv_remove(struct device *dev)
333 struct platform_device *pdev = to_platform_device(dev);
334 struct usb_hcd *hcd = dev_get_drvdata(dev);
336 usb_hcd_pxa27x_remove(hcd, pdev);
340 static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state, u32 level)
342 // struct platform_device *pdev = to_platform_device(dev);
343 // struct usb_hcd *hcd = dev_get_drvdata(dev);
344 printk("%s: not implemented yet\n", __FUNCTION__);
349 static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 level)
351 // struct platform_device *pdev = to_platform_device(dev);
352 // struct usb_hcd *hcd = dev_get_drvdata(dev);
353 printk("%s: not implemented yet\n", __FUNCTION__);
359 static struct device_driver ohci_hcd_pxa27x_driver = {
360 .name = "pxa27x-ohci",
361 .bus = &platform_bus_type,
362 .probe = ohci_hcd_pxa27x_drv_probe,
363 .remove = ohci_hcd_pxa27x_drv_remove,
364 .suspend = ohci_hcd_pxa27x_drv_suspend,
365 .resume = ohci_hcd_pxa27x_drv_resume,
368 static int __init ohci_hcd_pxa27x_init (void)
370 pr_debug (DRIVER_INFO " (pxa27x)");
371 pr_debug ("block sizes: ed %d td %d\n",
372 sizeof (struct ed), sizeof (struct td));
374 return driver_register(&ohci_hcd_pxa27x_driver);
377 static void __exit ohci_hcd_pxa27x_cleanup (void)
379 driver_unregister(&ohci_hcd_pxa27x_driver);
382 module_init (ohci_hcd_pxa27x_init);
383 module_exit (ohci_hcd_pxa27x_cleanup);