Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq
[linux-2.6] / drivers / usb / host / ohci-omap.c
1 /*
2  * OHCI HCD (Host Controller Driver) for USB.
3  *
4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5  * (C) Copyright 2000-2005 David Brownell
6  * (C) Copyright 2002 Hewlett-Packard Company
7  * 
8  * OMAP Bus Glue
9  *
10  * Modified for OMAP by Tony Lindgren <tony@atomide.com>
11  * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
12  * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
13  *
14  * This file is licenced under the GPL.
15  */
16
17 #include <linux/signal.h>       /* SA_INTERRUPT */
18 #include <linux/jiffies.h>
19 #include <linux/platform_device.h>
20
21 #include <asm/hardware.h>
22 #include <asm/io.h>
23 #include <asm/mach-types.h>
24
25 #include <asm/arch/mux.h>
26 #include <asm/arch/irqs.h>
27 #include <asm/arch/gpio.h>
28 #include <asm/arch/fpga.h>
29 #include <asm/arch/usb.h>
30 #include <asm/hardware/clock.h>
31
32
33 /* OMAP-1510 OHCI has its own MMU for DMA */
34 #define OMAP1510_LB_MEMSIZE     32      /* Should be same as SDRAM size */
35 #define OMAP1510_LB_CLOCK_DIV   0xfffec10c
36 #define OMAP1510_LB_MMU_CTL     0xfffec208
37 #define OMAP1510_LB_MMU_LCK     0xfffec224
38 #define OMAP1510_LB_MMU_LD_TLB  0xfffec228
39 #define OMAP1510_LB_MMU_CAM_H   0xfffec22c
40 #define OMAP1510_LB_MMU_CAM_L   0xfffec230
41 #define OMAP1510_LB_MMU_RAM_H   0xfffec234
42 #define OMAP1510_LB_MMU_RAM_L   0xfffec238
43
44
45 #ifndef CONFIG_ARCH_OMAP
46 #error "This file is OMAP bus glue.  CONFIG_OMAP must be defined."
47 #endif
48
49 #ifdef CONFIG_TPS65010
50 #include <asm/arch/tps65010.h>
51 #else
52
53 #define LOW     0
54 #define HIGH    1
55
56 #define GPIO1   1
57
58 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
59 {
60         return 0;
61 }
62
63 #endif
64
65 extern int usb_disabled(void);
66 extern int ocpi_enable(void);
67
68 static struct clk *usb_host_ck;
69
70 static void omap_ohci_clock_power(int on)
71 {
72         if (on) {
73                 clk_enable(usb_host_ck);
74                 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
75                 udelay(100);
76         } else {
77                 clk_disable(usb_host_ck);
78         }
79 }
80
81 /*
82  * Board specific gang-switched transceiver power on/off.
83  * NOTE:  OSK supplies power from DC, not battery.
84  */
85 static int omap_ohci_transceiver_power(int on)
86 {
87         if (on) {
88                 if (machine_is_omap_innovator() && cpu_is_omap1510())
89                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
90                                 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), 
91                                INNOVATOR_FPGA_CAM_USB_CONTROL);
92                 else if (machine_is_omap_osk())
93                         tps65010_set_gpio_out_value(GPIO1, LOW);
94         } else {
95                 if (machine_is_omap_innovator() && cpu_is_omap1510())
96                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
97                                 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), 
98                                INNOVATOR_FPGA_CAM_USB_CONTROL);
99                 else if (machine_is_omap_osk())
100                         tps65010_set_gpio_out_value(GPIO1, HIGH);
101         }
102
103         return 0;
104 }
105
106 /*
107  * OMAP-1510 specific Local Bus clock on/off
108  */
109 static int omap_1510_local_bus_power(int on)
110 {
111         if (on) {
112                 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
113                 udelay(200);
114         } else {
115                 omap_writel(0, OMAP1510_LB_MMU_CTL);
116         }
117
118         return 0;
119 }
120
121 /*
122  * OMAP-1510 specific Local Bus initialization
123  * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
124  *       See also arch/mach-omap/memory.h for __virt_to_dma() and 
125  *       __dma_to_virt() which need to match with the physical 
126  *       Local Bus address below.
127  */
128 static int omap_1510_local_bus_init(void)
129 {
130         unsigned int tlb;
131         unsigned long lbaddr, physaddr;
132
133         omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4, 
134                OMAP1510_LB_CLOCK_DIV);
135
136         /* Configure the Local Bus MMU table */
137         for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
138                 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
139                 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
140                 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
141                 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc, 
142                        OMAP1510_LB_MMU_CAM_L);
143                 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
144                 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
145                 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
146                 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
147         }
148
149         /* Enable the walking table */
150         omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
151         udelay(200);
152
153         return 0;
154 }
155
156 #ifdef  CONFIG_USB_OTG
157
158 static void start_hnp(struct ohci_hcd *ohci)
159 {
160         const unsigned  port = ohci_to_hcd(ohci)->self.otg_port - 1;
161         unsigned long   flags;
162
163         otg_start_hnp(ohci->transceiver);
164
165         local_irq_save(flags);
166         ohci->transceiver->state = OTG_STATE_A_SUSPEND;
167         writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
168         OTG_CTRL_REG &= ~OTG_A_BUSREQ;
169         local_irq_restore(flags);
170 }
171
172 #endif
173
174 /*-------------------------------------------------------------------------*/
175
176 static int omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev)
177 {
178         struct omap_usb_config  *config = pdev->dev.platform_data;
179         int                     need_transceiver = (config->otg != 0);
180         int                     ret;
181
182         dev_dbg(&pdev->dev, "starting USB Controller\n");
183
184         if (config->otg) {
185                 ohci_to_hcd(ohci)->self.otg_port = config->otg;
186                 /* default/minimum OTG power budget:  8 mA */
187                 ohci_to_hcd(ohci)->power_budget = 8;
188         }
189
190         /* boards can use OTG transceivers in non-OTG modes */
191         need_transceiver = need_transceiver
192                         || machine_is_omap_h2() || machine_is_omap_h3();
193
194         if (cpu_is_omap16xx())
195                 ocpi_enable();
196
197 #ifdef  CONFIG_ARCH_OMAP_OTG
198         if (need_transceiver) {
199                 ohci->transceiver = otg_get_transceiver();
200                 if (ohci->transceiver) {
201                         int     status = otg_set_host(ohci->transceiver,
202                                                 &ohci_to_hcd(ohci)->self);
203                         dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
204                                         ohci->transceiver->label, status);
205                         if (status) {
206                                 if (ohci->transceiver)
207                                         put_device(ohci->transceiver->dev);
208                                 return status;
209                         }
210                 } else {
211                         dev_err(&pdev->dev, "can't find transceiver\n");
212                         return -ENODEV;
213                 }
214         }
215 #endif
216
217         omap_ohci_clock_power(1);
218
219         if (cpu_is_omap1510()) {
220                 omap_1510_local_bus_power(1);
221                 omap_1510_local_bus_init();
222         }
223
224         if ((ret = ohci_init(ohci)) < 0)
225                 return ret;
226
227         /* board-specific power switching and overcurrent support */
228         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
229                 u32     rh = roothub_a (ohci);
230
231                 /* power switching (ganged by default) */
232                 rh &= ~RH_A_NPS;
233
234                 /* TPS2045 switch for internal transceiver (port 1) */
235                 if (machine_is_omap_osk()) {
236                         ohci_to_hcd(ohci)->power_budget = 250;
237
238                         rh &= ~RH_A_NOCP;
239
240                         /* gpio9 for overcurrent detction */
241                         omap_cfg_reg(W8_1610_GPIO9);
242                         omap_request_gpio(9);
243                         omap_set_gpio_direction(9, 1 /* IN */);
244
245                         /* for paranoia's sake:  disable USB.PUEN */
246                         omap_cfg_reg(W4_USB_HIGHZ);
247                 }
248                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
249                 distrust_firmware = 0;
250         }
251
252         /* FIXME khubd hub requests should manage power switching */
253         omap_ohci_transceiver_power(1);
254
255         /* board init will have already handled HMC and mux setup.
256          * any external transceiver should already be initialized
257          * too, so all configured ports use the right signaling now.
258          */
259
260         return 0;
261 }
262
263 static void omap_stop_hc(struct platform_device *pdev)
264 {
265         dev_dbg(&pdev->dev, "stopping USB Controller\n");
266         omap_ohci_clock_power(0);
267 }
268
269
270 /*-------------------------------------------------------------------------*/
271
272 void usb_hcd_omap_remove (struct usb_hcd *, struct platform_device *);
273
274 /* configure so an HC device and id are always provided */
275 /* always called with process context; sleeping is OK */
276
277
278 /**
279  * usb_hcd_omap_probe - initialize OMAP-based HCDs
280  * Context: !in_interrupt()
281  *
282  * Allocates basic resources for this USB host controller, and
283  * then invokes the start() method for the HCD associated with it
284  * through the hotplug entry's driver_data.
285  */
286 int usb_hcd_omap_probe (const struct hc_driver *driver,
287                           struct platform_device *pdev)
288 {
289         int retval;
290         struct usb_hcd *hcd = 0;
291         struct ohci_hcd *ohci;
292
293         if (pdev->num_resources != 2) {
294                 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", 
295                        pdev->num_resources);
296                 return -ENODEV;
297         }
298
299         if (pdev->resource[0].flags != IORESOURCE_MEM 
300                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
301                 printk(KERN_ERR "hcd probe: invalid resource type\n");
302                 return -ENODEV;
303         }
304
305         usb_host_ck = clk_get(0, "usb_hhc_ck");
306         if (IS_ERR(usb_host_ck))
307                 return PTR_ERR(usb_host_ck);
308
309         hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
310         if (!hcd) {
311                 retval = -ENOMEM;
312                 goto err0;
313         }
314         hcd->rsrc_start = pdev->resource[0].start;
315         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
316
317         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
318                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
319                 retval = -EBUSY;
320                 goto err1;
321         }
322
323         hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
324
325         ohci = hcd_to_ohci(hcd);
326         ohci_hcd_init(ohci);
327
328         retval = omap_start_hc(ohci, pdev);
329         if (retval < 0)
330                 goto err2;
331
332         retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), SA_INTERRUPT);
333         if (retval == 0)
334                 return retval;
335
336         omap_stop_hc(pdev);
337 err2:
338         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
339 err1:
340         usb_put_hcd(hcd);
341 err0:
342         clk_put(usb_host_ck);
343         return retval;
344 }
345
346
347 /* may be called with controller, bus, and devices active */
348
349 /**
350  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
351  * @dev: USB Host Controller being removed
352  * Context: !in_interrupt()
353  *
354  * Reverses the effect of usb_hcd_omap_probe(), first invoking
355  * the HCD's stop() method.  It is always called from a thread
356  * context, normally "rmmod", "apmd", or something similar.
357  *
358  */
359 void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
360 {
361         usb_remove_hcd(hcd);
362         if (machine_is_omap_osk())
363                 omap_free_gpio(9);
364         omap_stop_hc(pdev);
365         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
366         usb_put_hcd(hcd);
367         clk_put(usb_host_ck);
368 }
369
370 /*-------------------------------------------------------------------------*/
371
372 static int __devinit
373 ohci_omap_start (struct usb_hcd *hcd)
374 {
375         struct omap_usb_config *config;
376         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
377         int             ret;
378
379         config = hcd->self.controller->platform_data;
380         if (config->otg || config->rwc)
381                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
382
383         if ((ret = ohci_run (ohci)) < 0) {
384                 dev_err(hcd->self.controller, "can't start\n");
385                 ohci_stop (hcd);
386                 return ret;
387         }
388         return 0;
389 }
390
391 /*-------------------------------------------------------------------------*/
392
393 static const struct hc_driver ohci_omap_hc_driver = {
394         .description =          hcd_name,
395         .product_desc =         "OMAP OHCI",
396         .hcd_priv_size =        sizeof(struct ohci_hcd),
397
398         /*
399          * generic hardware linkage
400          */
401         .irq =                  ohci_irq,
402         .flags =                HCD_USB11 | HCD_MEMORY,
403
404         /*
405          * basic lifecycle operations
406          */
407         .start =                ohci_omap_start,
408         .stop =                 ohci_stop,
409
410         /*
411          * managing i/o requests and associated device resources
412          */
413         .urb_enqueue =          ohci_urb_enqueue,
414         .urb_dequeue =          ohci_urb_dequeue,
415         .endpoint_disable =     ohci_endpoint_disable,
416
417         /*
418          * scheduling support
419          */
420         .get_frame_number =     ohci_get_frame,
421
422         /*
423          * root hub support
424          */
425         .hub_status_data =      ohci_hub_status_data,
426         .hub_control =          ohci_hub_control,
427 #ifdef  CONFIG_PM
428         .bus_suspend =          ohci_bus_suspend,
429         .bus_resume =           ohci_bus_resume,
430 #endif
431         .start_port_reset =     ohci_start_port_reset,
432 };
433
434 /*-------------------------------------------------------------------------*/
435
436 static int ohci_hcd_omap_drv_probe(struct device *dev)
437 {
438         return usb_hcd_omap_probe(&ohci_omap_hc_driver,
439                                 to_platform_device(dev));
440 }
441
442 static int ohci_hcd_omap_drv_remove(struct device *dev)
443 {
444         struct platform_device  *pdev = to_platform_device(dev);
445         struct usb_hcd          *hcd = dev_get_drvdata(dev);
446         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
447
448         usb_hcd_omap_remove(hcd, pdev);
449         if (ohci->transceiver) {
450                 (void) otg_set_host(ohci->transceiver, 0);
451                 put_device(ohci->transceiver->dev);
452         }
453         dev_set_drvdata(dev, NULL);
454
455         return 0;
456 }
457
458 /*-------------------------------------------------------------------------*/
459
460 #ifdef  CONFIG_PM
461
462 static int ohci_omap_suspend(struct device *dev, pm_message_t message)
463 {
464         struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev));
465
466         if (time_before(jiffies, ohci->next_statechange))
467                 msleep(5);
468         ohci->next_statechange = jiffies;
469
470         omap_ohci_clock_power(0);
471         ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
472         dev->power.power_state = PMSG_SUSPEND;
473         return 0;
474 }
475
476 static int ohci_omap_resume(struct device *dev)
477 {
478         struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev));
479
480         if (time_before(jiffies, ohci->next_statechange))
481                 msleep(5);
482         ohci->next_statechange = jiffies;
483
484         omap_ohci_clock_power(1);
485         dev->power.power_state = PMSG_ON;
486         usb_hcd_resume_root_hub(dev_get_drvdata(dev));
487         return 0;
488 }
489
490 #endif
491
492 /*-------------------------------------------------------------------------*/
493
494 /*
495  * Driver definition to register with the OMAP bus
496  */
497 static struct device_driver ohci_hcd_omap_driver = {
498         .name           = "ohci",
499         .owner          = THIS_MODULE,
500         .bus            = &platform_bus_type,
501         .probe          = ohci_hcd_omap_drv_probe,
502         .remove         = ohci_hcd_omap_drv_remove,
503 #ifdef  CONFIG_PM
504         .suspend        = ohci_omap_suspend,
505         .resume         = ohci_omap_resume,
506 #endif
507 };
508
509 static int __init ohci_hcd_omap_init (void)
510 {
511         printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
512         if (usb_disabled())
513                 return -ENODEV;
514
515         pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
516                 sizeof (struct ed), sizeof (struct td));
517
518         return driver_register(&ohci_hcd_omap_driver);
519 }
520
521 static void __exit ohci_hcd_omap_cleanup (void)
522 {
523         driver_unregister(&ohci_hcd_omap_driver);
524 }
525
526 module_init (ohci_hcd_omap_init);
527 module_exit (ohci_hcd_omap_cleanup);