[ARM] Eliminate useless includes of asm/mach-types.h
[linux-2.6.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 <linux/signal.h>
24 #include <linux/platform_device.h>
25 #include <linux/clk.h>
26
27 #include <asm/hardware.h>
28 #include <asm/arch/pxa-regs.h>
29 #include <asm/arch/pxa2xx-regs.h> /* FIXME: for PSSR */
30 #include <asm/arch/ohci.h>
31
32 #define PXA_UHC_MAX_PORTNUM    3
33
34 #define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
35
36 static struct clk *usb_clk;
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         switch ( mode ) {
51         case PMM_NPS_MODE:
52                 UHCRHDA |= RH_A_NPS;
53                 break;
54         case PMM_GLOBAL_MODE:
55                 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
56                 break;
57         case PMM_PERPORT_MODE:
58                 UHCRHDA &= ~(RH_A_NPS);
59                 UHCRHDA |= RH_A_PSM;
60
61                 /* Set port power control mask bits, only 3 ports. */
62                 UHCRHDB |= (0x7<<17);
63                 break;
64         default:
65                 printk( KERN_ERR
66                         "Invalid mode %d, set to non-power switch mode.\n",
67                         mode );
68
69                 UHCRHDA |= RH_A_NPS;
70         }
71
72         return 0;
73 }
74
75 extern int usb_disabled(void);
76
77 /*-------------------------------------------------------------------------*/
78
79 static int pxa27x_start_hc(struct device *dev)
80 {
81         int retval = 0;
82         struct pxaohci_platform_data *inf;
83
84         inf = dev->platform_data;
85
86         clk_enable(usb_clk);
87
88         UHCHR |= UHCHR_FHR;
89         udelay(11);
90         UHCHR &= ~UHCHR_FHR;
91
92         UHCHR |= UHCHR_FSBIR;
93         while (UHCHR & UHCHR_FSBIR)
94                 cpu_relax();
95
96         if (inf->init)
97                 retval = inf->init(dev);
98
99         if (retval < 0)
100                 return retval;
101
102         UHCHR &= ~UHCHR_SSE;
103
104         UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
105
106         /* Clear any OTG Pin Hold */
107         if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
108                 PSSR |= PSSR_OTGPH;
109
110         return 0;
111 }
112
113 static void pxa27x_stop_hc(struct device *dev)
114 {
115         struct pxaohci_platform_data *inf;
116
117         inf = dev->platform_data;
118
119         if (inf->exit)
120                 inf->exit(dev);
121
122         UHCHR |= UHCHR_FHR;
123         udelay(11);
124         UHCHR &= ~UHCHR_FHR;
125
126         UHCCOMS |= 1;
127         udelay(10);
128
129         clk_disable(usb_clk);
130 }
131
132
133 /*-------------------------------------------------------------------------*/
134
135 /* configure so an HC device and id are always provided */
136 /* always called with process context; sleeping is OK */
137
138
139 /**
140  * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
141  * Context: !in_interrupt()
142  *
143  * Allocates basic resources for this USB host controller, and
144  * then invokes the start() method for the HCD associated with it
145  * through the hotplug entry's driver_data.
146  *
147  */
148 int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
149 {
150         int retval;
151         struct usb_hcd *hcd;
152         struct pxaohci_platform_data *inf;
153
154         inf = pdev->dev.platform_data;
155
156         if (!inf)
157                 return -ENODEV;
158
159         if (pdev->resource[1].flags != IORESOURCE_IRQ) {
160                 pr_debug ("resource[1] is not IORESOURCE_IRQ");
161                 return -ENOMEM;
162         }
163
164         usb_clk = clk_get(&pdev->dev, "USBCLK");
165         if (IS_ERR(usb_clk))
166                 return PTR_ERR(usb_clk);
167
168         hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
169         if (!hcd)
170                 return -ENOMEM;
171         hcd->rsrc_start = pdev->resource[0].start;
172         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
173
174         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
175                 pr_debug("request_mem_region failed");
176                 retval = -EBUSY;
177                 goto err1;
178         }
179
180         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
181         if (!hcd->regs) {
182                 pr_debug("ioremap failed");
183                 retval = -ENOMEM;
184                 goto err2;
185         }
186
187         if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
188                 pr_debug("pxa27x_start_hc failed");
189                 goto err3;
190         }
191
192         /* Select Power Management Mode */
193         pxa27x_ohci_select_pmm(inf->port_mode);
194
195         if (inf->power_budget)
196                 hcd->power_budget = inf->power_budget;
197
198         ohci_hcd_init(hcd_to_ohci(hcd));
199
200         retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
201         if (retval == 0)
202                 return retval;
203
204         pxa27x_stop_hc(&pdev->dev);
205  err3:
206         iounmap(hcd->regs);
207  err2:
208         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
209  err1:
210         usb_put_hcd(hcd);
211         clk_put(usb_clk);
212         return retval;
213 }
214
215
216 /* may be called without controller electrically present */
217 /* may be called with controller, bus, and devices active */
218
219 /**
220  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
221  * @dev: USB Host Controller being removed
222  * Context: !in_interrupt()
223  *
224  * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
225  * the HCD's stop() method.  It is always called from a thread
226  * context, normally "rmmod", "apmd", or something similar.
227  *
228  */
229 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
230 {
231         usb_remove_hcd(hcd);
232         pxa27x_stop_hc(&pdev->dev);
233         iounmap(hcd->regs);
234         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
235         usb_put_hcd(hcd);
236         clk_put(usb_clk);
237 }
238
239 /*-------------------------------------------------------------------------*/
240
241 static int __devinit
242 ohci_pxa27x_start (struct usb_hcd *hcd)
243 {
244         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
245         int             ret;
246
247         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
248
249         /* The value of NDP in roothub_a is incorrect on this hardware */
250         ohci->num_ports = 3;
251
252         if ((ret = ohci_init(ohci)) < 0)
253                 return ret;
254
255         if ((ret = ohci_run (ohci)) < 0) {
256                 err ("can't start %s", hcd->self.bus_name);
257                 ohci_stop (hcd);
258                 return ret;
259         }
260
261         return 0;
262 }
263
264 /*-------------------------------------------------------------------------*/
265
266 static const struct hc_driver ohci_pxa27x_hc_driver = {
267         .description =          hcd_name,
268         .product_desc =         "PXA27x OHCI",
269         .hcd_priv_size =        sizeof(struct ohci_hcd),
270
271         /*
272          * generic hardware linkage
273          */
274         .irq =                  ohci_irq,
275         .flags =                HCD_USB11 | HCD_MEMORY,
276
277         /*
278          * basic lifecycle operations
279          */
280         .start =                ohci_pxa27x_start,
281         .stop =                 ohci_stop,
282         .shutdown =             ohci_shutdown,
283
284         /*
285          * managing i/o requests and associated device resources
286          */
287         .urb_enqueue =          ohci_urb_enqueue,
288         .urb_dequeue =          ohci_urb_dequeue,
289         .endpoint_disable =     ohci_endpoint_disable,
290
291         /*
292          * scheduling support
293          */
294         .get_frame_number =     ohci_get_frame,
295
296         /*
297          * root hub support
298          */
299         .hub_status_data =      ohci_hub_status_data,
300         .hub_control =          ohci_hub_control,
301         .hub_irq_enable =       ohci_rhsc_enable,
302 #ifdef  CONFIG_PM
303         .bus_suspend =          ohci_bus_suspend,
304         .bus_resume =           ohci_bus_resume,
305 #endif
306         .start_port_reset =     ohci_start_port_reset,
307 };
308
309 /*-------------------------------------------------------------------------*/
310
311 static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
312 {
313         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
314
315         if (usb_disabled())
316                 return -ENODEV;
317
318         return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
319 }
320
321 static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
322 {
323         struct usb_hcd *hcd = platform_get_drvdata(pdev);
324
325         usb_hcd_pxa27x_remove(hcd, pdev);
326         platform_set_drvdata(pdev, NULL);
327         return 0;
328 }
329
330 #ifdef  CONFIG_PM
331 static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
332 {
333         struct usb_hcd *hcd = platform_get_drvdata(pdev);
334         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
335
336         if (time_before(jiffies, ohci->next_statechange))
337                 msleep(5);
338         ohci->next_statechange = jiffies;
339
340         pxa27x_stop_hc(&pdev->dev);
341         hcd->state = HC_STATE_SUSPENDED;
342
343         return 0;
344 }
345
346 static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
347 {
348         struct usb_hcd *hcd = platform_get_drvdata(pdev);
349         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
350         int status;
351
352         if (time_before(jiffies, ohci->next_statechange))
353                 msleep(5);
354         ohci->next_statechange = jiffies;
355
356         if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
357                 return status;
358
359         ohci_finish_controller_resume(hcd);
360         return 0;
361 }
362 #endif
363
364 /* work with hotplug and coldplug */
365 MODULE_ALIAS("platform:pxa27x-ohci");
366
367 static struct platform_driver ohci_hcd_pxa27x_driver = {
368         .probe          = ohci_hcd_pxa27x_drv_probe,
369         .remove         = ohci_hcd_pxa27x_drv_remove,
370         .shutdown       = usb_hcd_platform_shutdown,
371 #ifdef CONFIG_PM
372         .suspend        = ohci_hcd_pxa27x_drv_suspend,
373         .resume         = ohci_hcd_pxa27x_drv_resume,
374 #endif
375         .driver         = {
376                 .name   = "pxa27x-ohci",
377                 .owner  = THIS_MODULE,
378         },
379 };
380