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[linux-3.10.git] / 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 <asm/mach-types.h>
24 #include <asm/hardware.h>
25 #include <asm/arch/pxa-regs.h>
26
27
28 #define PMM_NPS_MODE           1
29 #define PMM_GLOBAL_MODE        2
30 #define PMM_PERPORT_MODE       3
31
32 #define PXA_UHC_MAX_PORTNUM    3
33
34 #define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
35
36 static int pxa27x_ohci_pmm_state;
37
38 /*
39   PMM_NPS_MODE -- PMM Non-power switching mode
40       Ports are powered continuously.
41
42   PMM_GLOBAL_MODE -- PMM global switching mode
43       All ports are powered at the same time.
44
45   PMM_PERPORT_MODE -- PMM per port switching mode
46       Ports are powered individually.
47  */
48 static int pxa27x_ohci_select_pmm( int mode )
49 {
50         pxa27x_ohci_pmm_state = mode;
51
52         switch ( mode ) {
53         case PMM_NPS_MODE:
54                 UHCRHDA |= RH_A_NPS;
55                 break; 
56         case PMM_GLOBAL_MODE:
57                 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
58                 break;
59         case PMM_PERPORT_MODE:
60                 UHCRHDA &= ~(RH_A_NPS);
61                 UHCRHDA |= RH_A_PSM;
62
63                 /* Set port power control mask bits, only 3 ports. */
64                 UHCRHDB |= (0x7<<17);
65                 break;
66         default:
67                 printk( KERN_ERR
68                         "Invalid mode %d, set to non-power switch mode.\n", 
69                         mode );
70
71                 pxa27x_ohci_pmm_state = PMM_NPS_MODE;
72                 UHCRHDA |= RH_A_NPS;
73         }
74
75         return 0;
76 }
77
78 /*
79   If you select PMM_PERPORT_MODE, you should set the port power
80  */
81 static int pxa27x_ohci_set_port_power( int port )
82 {
83         if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE)
84              && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) {
85                 UHCRHPS(port) |= 0x100;
86                 return 0;
87         }
88         return -1;
89 }
90
91 /*
92   If you select PMM_PERPORT_MODE, you should set the port power
93  */
94 static int pxa27x_ohci_clear_port_power( int port )
95 {
96         if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE) 
97              && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) {
98                 UHCRHPS(port) |= 0x200;
99                 return 0;
100         }
101          
102         return -1;
103 }
104
105 extern int usb_disabled(void);
106
107 /*-------------------------------------------------------------------------*/
108
109 static void pxa27x_start_hc(struct platform_device *dev)
110 {
111         pxa_set_cken(CKEN10_USBHOST, 1);
112
113         UHCHR |= UHCHR_FHR;
114         udelay(11);
115         UHCHR &= ~UHCHR_FHR;
116
117         UHCHR |= UHCHR_FSBIR;
118         while (UHCHR & UHCHR_FSBIR)
119                 cpu_relax();
120
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 */
128
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);
133         }
134
135         UHCHR &= ~UHCHR_SSE;
136
137         UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
138 }
139
140 static void pxa27x_stop_hc(struct platform_device *dev)
141 {
142         UHCHR |= UHCHR_FHR;
143         udelay(11);
144         UHCHR &= ~UHCHR_FHR;
145
146         UHCCOMS |= 1;
147         udelay(10);
148
149         pxa_set_cken(CKEN10_USBHOST, 0);
150 }
151
152
153 /*-------------------------------------------------------------------------*/
154
155 /* configure so an HC device and id are always provided */
156 /* always called with process context; sleeping is OK */
157
158
159 /**
160  * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
161  * Context: !in_interrupt()
162  *
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.
166  *
167  */
168 int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
169                           struct platform_device *dev)
170 {
171         int retval;
172         struct usb_hcd *hcd;
173
174         if (dev->resource[1].flags != IORESOURCE_IRQ) {
175                 pr_debug ("resource[1] is not IORESOURCE_IRQ");
176                 return -ENOMEM;
177         }
178
179         hcd = usb_create_hcd (driver, &dev->dev, "pxa27x");
180         if (!hcd)
181                 return -ENOMEM;
182         hcd->rsrc_start = dev->resource[0].start;
183         hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
184
185         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
186                 pr_debug("request_mem_region failed");
187                 retval = -EBUSY;
188                 goto err1;
189         }
190
191         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
192         if (!hcd->regs) {
193                 pr_debug("ioremap failed");
194                 retval = -ENOMEM;
195                 goto err2;
196         }
197
198         pxa27x_start_hc(dev);
199
200         /* Select Power Management Mode */
201         pxa27x_ohci_select_pmm( PMM_PERPORT_MODE );
202
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");
206
207         if (pxa27x_ohci_clear_port_power(2) < 0)
208                 printk(KERN_ERR "Setting port 2 power failed.\n");
209
210         if (pxa27x_ohci_clear_port_power(3) < 0)
211                 printk(KERN_ERR "Setting port 3 power failed.\n");
212
213         ohci_hcd_init(hcd_to_ohci(hcd));
214
215         retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
216         if (retval == 0)
217                 return retval;
218
219         pxa27x_stop_hc(dev);
220         iounmap(hcd->regs);
221  err2:
222         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
223  err1:
224         usb_put_hcd(hcd);
225         return retval;
226 }
227
228
229 /* may be called without controller electrically present */
230 /* may be called with controller, bus, and devices active */
231
232 /**
233  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
234  * @dev: USB Host Controller being removed
235  * Context: !in_interrupt()
236  *
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.
240  *
241  */
242 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
243 {
244         usb_remove_hcd(hcd);
245         pxa27x_stop_hc(dev);
246         iounmap(hcd->regs);
247         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
248         usb_put_hcd(hcd);
249 }
250
251 /*-------------------------------------------------------------------------*/
252
253 static int __devinit
254 ohci_pxa27x_start (struct usb_hcd *hcd)
255 {
256         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
257         int             ret;
258
259         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
260
261         if ((ret = ohci_init(ohci)) < 0)
262                 return ret;
263
264         if ((ret = ohci_run (ohci)) < 0) {
265                 err ("can't start %s", hcd->self.bus_name);
266                 ohci_stop (hcd);
267                 return ret;
268         }
269
270         return 0;
271 }
272
273 /*-------------------------------------------------------------------------*/
274
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),
279
280         /*
281          * generic hardware linkage
282          */
283         .irq =                  ohci_irq,
284         .flags =                HCD_USB11 | HCD_MEMORY,
285
286         /*
287          * basic lifecycle operations
288          */
289         .start =                ohci_pxa27x_start,
290         .stop =                 ohci_stop,
291
292         /*
293          * managing i/o requests and associated device resources
294          */
295         .urb_enqueue =          ohci_urb_enqueue,
296         .urb_dequeue =          ohci_urb_dequeue,
297         .endpoint_disable =     ohci_endpoint_disable,
298
299         /*
300          * scheduling support
301          */
302         .get_frame_number =     ohci_get_frame,
303
304         /*
305          * root hub support
306          */
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,
312 #endif
313 };
314
315 /*-------------------------------------------------------------------------*/
316
317 static int ohci_hcd_pxa27x_drv_probe(struct device *dev)
318 {
319         struct platform_device *pdev = to_platform_device(dev);
320         int ret;
321
322         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
323
324         if (usb_disabled())
325                 return -ENODEV;
326
327         ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
328         return ret;
329 }
330
331 static int ohci_hcd_pxa27x_drv_remove(struct device *dev)
332 {
333         struct platform_device *pdev = to_platform_device(dev);
334         struct usb_hcd *hcd = dev_get_drvdata(dev);
335
336         usb_hcd_pxa27x_remove(hcd, pdev);
337         return 0;
338 }
339
340 static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, u32 state, u32 level)
341 {
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__);
345
346         return 0;
347 }
348
349 static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 state)
350 {
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__);
354
355         return 0;
356 }
357
358
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, 
366 };
367
368 static int __init ohci_hcd_pxa27x_init (void)
369 {
370         pr_debug (DRIVER_INFO " (pxa27x)");
371         pr_debug ("block sizes: ed %d td %d\n",
372                 sizeof (struct ed), sizeof (struct td));
373
374         return driver_register(&ohci_hcd_pxa27x_driver);
375 }
376
377 static void __exit ohci_hcd_pxa27x_cleanup (void)
378 {
379         driver_unregister(&ohci_hcd_pxa27x_driver);
380 }
381
382 module_init (ohci_hcd_pxa27x_init);
383 module_exit (ohci_hcd_pxa27x_cleanup);