[PATCH] USB: unusual_devs entry for Lyra RCA RD1080
[linux-2.6] / drivers / usb / host / ohci-pxa27x.c
1 /*
2  * OHCI HCD (Host Controller Driver) for USB.
3  *
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
7  *
8  * Bus Glue for pxa27x
9  *
10  * Written by Christopher Hoover <ch@hpl.hp.com>
11  * Based on fragments of previous driver by Russell King et al.
12  *
13  * Modified for LH7A404 from ohci-sa1111.c
14  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
15  *
16  * Modified for pxa27x from ohci-lh7a404.c
17  *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
18  *
19  * This file is licenced under the GPL.
20  */
21
22 #include <linux/device.h>
23 #include <linux/signal.h>
24 #include <linux/platform_device.h>
25
26 #include <asm/mach-types.h>
27 #include <asm/hardware.h>
28 #include <asm/arch/pxa-regs.h>
29 #include <asm/arch/ohci.h>
30
31 #define PXA_UHC_MAX_PORTNUM    3
32
33 #define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
34
35 /*
36   PMM_NPS_MODE -- PMM Non-power switching mode
37       Ports are powered continuously.
38
39   PMM_GLOBAL_MODE -- PMM global switching mode
40       All ports are powered at the same time.
41
42   PMM_PERPORT_MODE -- PMM per port switching mode
43       Ports are powered individually.
44  */
45 static int pxa27x_ohci_select_pmm( int mode )
46 {
47         switch ( mode ) {
48         case PMM_NPS_MODE:
49                 UHCRHDA |= RH_A_NPS;
50                 break; 
51         case PMM_GLOBAL_MODE:
52                 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
53                 break;
54         case PMM_PERPORT_MODE:
55                 UHCRHDA &= ~(RH_A_NPS);
56                 UHCRHDA |= RH_A_PSM;
57
58                 /* Set port power control mask bits, only 3 ports. */
59                 UHCRHDB |= (0x7<<17);
60                 break;
61         default:
62                 printk( KERN_ERR
63                         "Invalid mode %d, set to non-power switch mode.\n", 
64                         mode );
65
66                 UHCRHDA |= RH_A_NPS;
67         }
68
69         return 0;
70 }
71
72 extern int usb_disabled(void);
73
74 /*-------------------------------------------------------------------------*/
75
76 static int pxa27x_start_hc(struct device *dev)
77 {
78         int retval = 0;
79         struct pxaohci_platform_data *inf;
80
81         inf = dev->platform_data;
82
83         pxa_set_cken(CKEN10_USBHOST, 1);
84
85         UHCHR |= UHCHR_FHR;
86         udelay(11);
87         UHCHR &= ~UHCHR_FHR;
88
89         UHCHR |= UHCHR_FSBIR;
90         while (UHCHR & UHCHR_FSBIR)
91                 cpu_relax();
92
93         if (inf->init)
94                 retval = inf->init(dev);
95
96         if (retval < 0)
97                 return retval;
98
99         UHCHR &= ~UHCHR_SSE;
100
101         UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
102
103         /* Clear any OTG Pin Hold */
104         if (PSSR & PSSR_OTGPH)
105                 PSSR |= PSSR_OTGPH;
106
107         return 0;
108 }
109
110 static void pxa27x_stop_hc(struct device *dev)
111 {
112         struct pxaohci_platform_data *inf;
113
114         inf = dev->platform_data;
115
116         if (inf->exit)
117                 inf->exit(dev);
118
119         UHCHR |= UHCHR_FHR;
120         udelay(11);
121         UHCHR &= ~UHCHR_FHR;
122
123         UHCCOMS |= 1;
124         udelay(10);
125
126         pxa_set_cken(CKEN10_USBHOST, 0);
127 }
128
129
130 /*-------------------------------------------------------------------------*/
131
132 /* configure so an HC device and id are always provided */
133 /* always called with process context; sleeping is OK */
134
135
136 /**
137  * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
138  * Context: !in_interrupt()
139  *
140  * Allocates basic resources for this USB host controller, and
141  * then invokes the start() method for the HCD associated with it
142  * through the hotplug entry's driver_data.
143  *
144  */
145 int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
146 {
147         int retval;
148         struct usb_hcd *hcd;
149         struct pxaohci_platform_data *inf;
150
151         inf = pdev->dev.platform_data;
152
153         if (!inf)
154                 return -ENODEV;
155
156         if (pdev->resource[1].flags != IORESOURCE_IRQ) {
157                 pr_debug ("resource[1] is not IORESOURCE_IRQ");
158                 return -ENOMEM;
159         }
160
161         hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
162         if (!hcd)
163                 return -ENOMEM;
164         hcd->rsrc_start = pdev->resource[0].start;
165         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
166
167         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
168                 pr_debug("request_mem_region failed");
169                 retval = -EBUSY;
170                 goto err1;
171         }
172
173         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
174         if (!hcd->regs) {
175                 pr_debug("ioremap failed");
176                 retval = -ENOMEM;
177                 goto err2;
178         }
179
180         if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
181                 pr_debug("pxa27x_start_hc failed");
182                 goto err3;
183         }
184
185         /* Select Power Management Mode */
186         pxa27x_ohci_select_pmm(inf->port_mode);
187
188         ohci_hcd_init(hcd_to_ohci(hcd));
189
190         retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
191         if (retval == 0)
192                 return retval;
193
194         pxa27x_stop_hc(&pdev->dev);
195  err3:
196         iounmap(hcd->regs);
197  err2:
198         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
199  err1:
200         usb_put_hcd(hcd);
201         return retval;
202 }
203
204
205 /* may be called without controller electrically present */
206 /* may be called with controller, bus, and devices active */
207
208 /**
209  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
210  * @dev: USB Host Controller being removed
211  * Context: !in_interrupt()
212  *
213  * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
214  * the HCD's stop() method.  It is always called from a thread
215  * context, normally "rmmod", "apmd", or something similar.
216  *
217  */
218 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
219 {
220         usb_remove_hcd(hcd);
221         pxa27x_stop_hc(&pdev->dev);
222         iounmap(hcd->regs);
223         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
224         usb_put_hcd(hcd);
225 }
226
227 /*-------------------------------------------------------------------------*/
228
229 static int __devinit
230 ohci_pxa27x_start (struct usb_hcd *hcd)
231 {
232         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
233         int             ret;
234
235         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
236
237         /* The value of NDP in roothub_a is incorrect on this hardware */
238         ohci->num_ports = 3;
239
240         if ((ret = ohci_init(ohci)) < 0)
241                 return ret;
242
243         if ((ret = ohci_run (ohci)) < 0) {
244                 err ("can't start %s", hcd->self.bus_name);
245                 ohci_stop (hcd);
246                 return ret;
247         }
248
249         return 0;
250 }
251
252 /*-------------------------------------------------------------------------*/
253
254 static const struct hc_driver ohci_pxa27x_hc_driver = {
255         .description =          hcd_name,
256         .product_desc =         "PXA27x OHCI",
257         .hcd_priv_size =        sizeof(struct ohci_hcd),
258
259         /*
260          * generic hardware linkage
261          */
262         .irq =                  ohci_irq,
263         .flags =                HCD_USB11 | HCD_MEMORY,
264
265         /*
266          * basic lifecycle operations
267          */
268         .start =                ohci_pxa27x_start,
269         .stop =                 ohci_stop,
270
271         /*
272          * managing i/o requests and associated device resources
273          */
274         .urb_enqueue =          ohci_urb_enqueue,
275         .urb_dequeue =          ohci_urb_dequeue,
276         .endpoint_disable =     ohci_endpoint_disable,
277
278         /*
279          * scheduling support
280          */
281         .get_frame_number =     ohci_get_frame,
282
283         /*
284          * root hub support
285          */
286         .hub_status_data =      ohci_hub_status_data,
287         .hub_control =          ohci_hub_control,
288 #ifdef  CONFIG_PM
289         .bus_suspend =          ohci_bus_suspend,
290         .bus_resume =           ohci_bus_resume,
291 #endif
292         .start_port_reset =     ohci_start_port_reset,
293 };
294
295 /*-------------------------------------------------------------------------*/
296
297 static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
298 {
299         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
300
301         if (usb_disabled())
302                 return -ENODEV;
303
304         return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
305 }
306
307 static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
308 {
309         struct usb_hcd *hcd = platform_get_drvdata(pdev);
310
311         usb_hcd_pxa27x_remove(hcd, pdev);
312         platform_set_drvdata(pdev, NULL);
313         return 0;
314 }
315
316 #ifdef  CONFIG_PM
317 static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
318 {
319         struct usb_hcd *hcd = platform_get_drvdata(pdev);
320         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
321
322         if (time_before(jiffies, ohci->next_statechange))
323                 msleep(5);
324         ohci->next_statechange = jiffies;
325
326         pxa27x_stop_hc(&pdev->dev);
327         hcd->state = HC_STATE_SUSPENDED;
328         pdev->dev.power.power_state = PMSG_SUSPEND;
329
330         return 0;
331 }
332
333 static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
334 {
335         struct usb_hcd *hcd = platform_get_drvdata(pdev);
336         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
337         int status;
338
339         if (time_before(jiffies, ohci->next_statechange))
340                 msleep(5);
341         ohci->next_statechange = jiffies;
342
343         if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
344                 return status;
345
346         pdev->dev.power.power_state = PMSG_ON;
347         usb_hcd_resume_root_hub(hcd);
348
349         return 0;
350 }
351 #endif
352
353
354 static struct platform_driver ohci_hcd_pxa27x_driver = {
355         .probe          = ohci_hcd_pxa27x_drv_probe,
356         .remove         = ohci_hcd_pxa27x_drv_remove,
357 #ifdef CONFIG_PM
358         .suspend        = ohci_hcd_pxa27x_drv_suspend, 
359         .resume         = ohci_hcd_pxa27x_drv_resume,
360 #endif
361         .driver         = {
362                 .name   = "pxa27x-ohci",
363         },
364 };
365
366 static int __init ohci_hcd_pxa27x_init (void)
367 {
368         pr_debug (DRIVER_INFO " (pxa27x)");
369         pr_debug ("block sizes: ed %d td %d\n",
370                 sizeof (struct ed), sizeof (struct td));
371
372         return platform_driver_register(&ohci_hcd_pxa27x_driver);
373 }
374
375 static void __exit ohci_hcd_pxa27x_cleanup (void)
376 {
377         platform_driver_unregister(&ohci_hcd_pxa27x_driver);
378 }
379
380 module_init (ohci_hcd_pxa27x_init);
381 module_exit (ohci_hcd_pxa27x_cleanup);