Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
[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>       /* IRQF_DISABLED */
18 #include <linux/jiffies.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21
22 #include <mach/hardware.h>
23 #include <asm/io.h>
24 #include <asm/mach-types.h>
25
26 #include <mach/mux.h>
27 #include <mach/irqs.h>
28 #include <mach/gpio.h>
29 #include <mach/fpga.h>
30 #include <mach/usb.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 <linux/i2c/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 static struct clk *usb_dc_ck;
70 static int host_enabled;
71 static int host_initialized;
72
73 static void omap_ohci_clock_power(int on)
74 {
75         if (on) {
76                 clk_enable(usb_dc_ck);
77                 clk_enable(usb_host_ck);
78                 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
79                 udelay(100);
80         } else {
81                 clk_disable(usb_host_ck);
82                 clk_disable(usb_dc_ck);
83         }
84 }
85
86 /*
87  * Board specific gang-switched transceiver power on/off.
88  * NOTE:  OSK supplies power from DC, not battery.
89  */
90 static int omap_ohci_transceiver_power(int on)
91 {
92         if (on) {
93                 if (machine_is_omap_innovator() && cpu_is_omap1510())
94                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
95                                 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
96                                INNOVATOR_FPGA_CAM_USB_CONTROL);
97                 else if (machine_is_omap_osk())
98                         tps65010_set_gpio_out_value(GPIO1, LOW);
99         } else {
100                 if (machine_is_omap_innovator() && cpu_is_omap1510())
101                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
102                                 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
103                                INNOVATOR_FPGA_CAM_USB_CONTROL);
104                 else if (machine_is_omap_osk())
105                         tps65010_set_gpio_out_value(GPIO1, HIGH);
106         }
107
108         return 0;
109 }
110
111 #ifdef CONFIG_ARCH_OMAP15XX
112 /*
113  * OMAP-1510 specific Local Bus clock on/off
114  */
115 static int omap_1510_local_bus_power(int on)
116 {
117         if (on) {
118                 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
119                 udelay(200);
120         } else {
121                 omap_writel(0, OMAP1510_LB_MMU_CTL);
122         }
123
124         return 0;
125 }
126
127 /*
128  * OMAP-1510 specific Local Bus initialization
129  * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
130  *       See also arch/mach-omap/memory.h for __virt_to_dma() and
131  *       __dma_to_virt() which need to match with the physical
132  *       Local Bus address below.
133  */
134 static int omap_1510_local_bus_init(void)
135 {
136         unsigned int tlb;
137         unsigned long lbaddr, physaddr;
138
139         omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
140                OMAP1510_LB_CLOCK_DIV);
141
142         /* Configure the Local Bus MMU table */
143         for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
144                 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
145                 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
146                 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
147                 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
148                        OMAP1510_LB_MMU_CAM_L);
149                 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
150                 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
151                 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
152                 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
153         }
154
155         /* Enable the walking table */
156         omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
157         udelay(200);
158
159         return 0;
160 }
161 #else
162 #define omap_1510_local_bus_power(x)    {}
163 #define omap_1510_local_bus_init()      {}
164 #endif
165
166 #ifdef  CONFIG_USB_OTG
167
168 static void start_hnp(struct ohci_hcd *ohci)
169 {
170         const unsigned  port = ohci_to_hcd(ohci)->self.otg_port - 1;
171         unsigned long   flags;
172         u32 l;
173
174         otg_start_hnp(ohci->transceiver);
175
176         local_irq_save(flags);
177         ohci->transceiver->state = OTG_STATE_A_SUSPEND;
178         writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
179         l = omap_readl(OTG_CTRL);
180         l &= ~OTG_A_BUSREQ;
181         omap_writel(l, OTG_CTRL);
182         local_irq_restore(flags);
183 }
184
185 #endif
186
187 /*-------------------------------------------------------------------------*/
188
189 static int ohci_omap_init(struct usb_hcd *hcd)
190 {
191         struct ohci_hcd         *ohci = hcd_to_ohci(hcd);
192         struct omap_usb_config  *config = hcd->self.controller->platform_data;
193         int                     need_transceiver = (config->otg != 0);
194         int                     ret;
195
196         dev_dbg(hcd->self.controller, "starting USB Controller\n");
197
198         if (config->otg) {
199                 ohci_to_hcd(ohci)->self.otg_port = config->otg;
200                 /* default/minimum OTG power budget:  8 mA */
201                 ohci_to_hcd(ohci)->power_budget = 8;
202         }
203
204         /* boards can use OTG transceivers in non-OTG modes */
205         need_transceiver = need_transceiver
206                         || machine_is_omap_h2() || machine_is_omap_h3();
207
208         if (cpu_is_omap16xx())
209                 ocpi_enable();
210
211 #ifdef  CONFIG_USB_OTG
212         if (need_transceiver) {
213                 ohci->transceiver = otg_get_transceiver();
214                 if (ohci->transceiver) {
215                         int     status = otg_set_host(ohci->transceiver,
216                                                 &ohci_to_hcd(ohci)->self);
217                         dev_dbg(hcd->self.controller, "init %s transceiver, status %d\n",
218                                         ohci->transceiver->label, status);
219                         if (status) {
220                                 if (ohci->transceiver)
221                                         put_device(ohci->transceiver->dev);
222                                 return status;
223                         }
224                 } else {
225                         dev_err(hcd->self.controller, "can't find transceiver\n");
226                         return -ENODEV;
227                 }
228                 ohci->start_hnp = start_hnp;
229         }
230 #endif
231
232         omap_ohci_clock_power(1);
233
234         if (cpu_is_omap15xx()) {
235                 omap_1510_local_bus_power(1);
236                 omap_1510_local_bus_init();
237         }
238
239         if ((ret = ohci_init(ohci)) < 0)
240                 return ret;
241
242         /* board-specific power switching and overcurrent support */
243         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
244                 u32     rh = roothub_a (ohci);
245
246                 /* power switching (ganged by default) */
247                 rh &= ~RH_A_NPS;
248
249                 /* TPS2045 switch for internal transceiver (port 1) */
250                 if (machine_is_omap_osk()) {
251                         ohci_to_hcd(ohci)->power_budget = 250;
252
253                         rh &= ~RH_A_NOCP;
254
255                         /* gpio9 for overcurrent detction */
256                         omap_cfg_reg(W8_1610_GPIO9);
257                         omap_request_gpio(9);
258                         omap_set_gpio_direction(9, 1 /* IN */);
259
260                         /* for paranoia's sake:  disable USB.PUEN */
261                         omap_cfg_reg(W4_USB_HIGHZ);
262                 }
263                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
264                 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
265         } else if (machine_is_nokia770()) {
266                 /* We require a self-powered hub, which should have
267                  * plenty of power. */
268                 ohci_to_hcd(ohci)->power_budget = 0;
269         }
270
271         /* FIXME khubd hub requests should manage power switching */
272         omap_ohci_transceiver_power(1);
273
274         /* board init will have already handled HMC and mux setup.
275          * any external transceiver should already be initialized
276          * too, so all configured ports use the right signaling now.
277          */
278
279         return 0;
280 }
281
282 static void ohci_omap_stop(struct usb_hcd *hcd)
283 {
284         dev_dbg(hcd->self.controller, "stopping USB Controller\n");
285         omap_ohci_clock_power(0);
286 }
287
288
289 /*-------------------------------------------------------------------------*/
290
291 /**
292  * usb_hcd_omap_probe - initialize OMAP-based HCDs
293  * Context: !in_interrupt()
294  *
295  * Allocates basic resources for this USB host controller, and
296  * then invokes the start() method for the HCD associated with it
297  * through the hotplug entry's driver_data.
298  */
299 static int usb_hcd_omap_probe (const struct hc_driver *driver,
300                           struct platform_device *pdev)
301 {
302         int retval, irq;
303         struct usb_hcd *hcd = 0;
304         struct ohci_hcd *ohci;
305
306         if (pdev->num_resources != 2) {
307                 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
308                        pdev->num_resources);
309                 return -ENODEV;
310         }
311
312         if (pdev->resource[0].flags != IORESOURCE_MEM
313                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
314                 printk(KERN_ERR "hcd probe: invalid resource type\n");
315                 return -ENODEV;
316         }
317
318         usb_host_ck = clk_get(0, "usb_hhc_ck");
319         if (IS_ERR(usb_host_ck))
320                 return PTR_ERR(usb_host_ck);
321
322         if (!cpu_is_omap15xx())
323                 usb_dc_ck = clk_get(0, "usb_dc_ck");
324         else
325                 usb_dc_ck = clk_get(0, "lb_ck");
326
327         if (IS_ERR(usb_dc_ck)) {
328                 clk_put(usb_host_ck);
329                 return PTR_ERR(usb_dc_ck);
330         }
331
332
333         hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
334         if (!hcd) {
335                 retval = -ENOMEM;
336                 goto err0;
337         }
338         hcd->rsrc_start = pdev->resource[0].start;
339         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
340
341         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
342                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
343                 retval = -EBUSY;
344                 goto err1;
345         }
346
347         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
348         if (!hcd->regs) {
349                 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
350                 retval = -ENOMEM;
351                 goto err2;
352         }
353
354         ohci = hcd_to_ohci(hcd);
355         ohci_hcd_init(ohci);
356
357         host_initialized = 0;
358         host_enabled = 1;
359
360         irq = platform_get_irq(pdev, 0);
361         if (irq < 0) {
362                 retval = -ENXIO;
363                 goto err3;
364         }
365         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
366         if (retval)
367                 goto err3;
368
369         host_initialized = 1;
370
371         if (!host_enabled)
372                 omap_ohci_clock_power(0);
373
374         return 0;
375 err3:
376         iounmap(hcd->regs);
377 err2:
378         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
379 err1:
380         usb_put_hcd(hcd);
381 err0:
382         clk_put(usb_dc_ck);
383         clk_put(usb_host_ck);
384         return retval;
385 }
386
387
388 /* may be called with controller, bus, and devices active */
389
390 /**
391  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
392  * @dev: USB Host Controller being removed
393  * Context: !in_interrupt()
394  *
395  * Reverses the effect of usb_hcd_omap_probe(), first invoking
396  * the HCD's stop() method.  It is always called from a thread
397  * context, normally "rmmod", "apmd", or something similar.
398  */
399 static inline void
400 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
401 {
402         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
403
404         usb_remove_hcd(hcd);
405         if (ohci->transceiver) {
406                 (void) otg_set_host(ohci->transceiver, 0);
407                 put_device(ohci->transceiver->dev);
408         }
409         if (machine_is_omap_osk())
410                 omap_free_gpio(9);
411         iounmap(hcd->regs);
412         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
413         usb_put_hcd(hcd);
414         clk_put(usb_dc_ck);
415         clk_put(usb_host_ck);
416 }
417
418 /*-------------------------------------------------------------------------*/
419
420 static int
421 ohci_omap_start (struct usb_hcd *hcd)
422 {
423         struct omap_usb_config *config;
424         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
425         int             ret;
426
427         if (!host_enabled)
428                 return 0;
429         config = hcd->self.controller->platform_data;
430         if (config->otg || config->rwc) {
431                 ohci->hc_control = OHCI_CTRL_RWC;
432                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
433         }
434
435         if ((ret = ohci_run (ohci)) < 0) {
436                 dev_err(hcd->self.controller, "can't start\n");
437                 ohci_stop (hcd);
438                 return ret;
439         }
440         return 0;
441 }
442
443 /*-------------------------------------------------------------------------*/
444
445 static const struct hc_driver ohci_omap_hc_driver = {
446         .description =          hcd_name,
447         .product_desc =         "OMAP OHCI",
448         .hcd_priv_size =        sizeof(struct ohci_hcd),
449
450         /*
451          * generic hardware linkage
452          */
453         .irq =                  ohci_irq,
454         .flags =                HCD_USB11 | HCD_MEMORY,
455
456         /*
457          * basic lifecycle operations
458          */
459         .reset =                ohci_omap_init,
460         .start =                ohci_omap_start,
461         .stop =                 ohci_omap_stop,
462         .shutdown =             ohci_shutdown,
463
464         /*
465          * managing i/o requests and associated device resources
466          */
467         .urb_enqueue =          ohci_urb_enqueue,
468         .urb_dequeue =          ohci_urb_dequeue,
469         .endpoint_disable =     ohci_endpoint_disable,
470
471         /*
472          * scheduling support
473          */
474         .get_frame_number =     ohci_get_frame,
475
476         /*
477          * root hub support
478          */
479         .hub_status_data =      ohci_hub_status_data,
480         .hub_control =          ohci_hub_control,
481 #ifdef  CONFIG_PM
482         .bus_suspend =          ohci_bus_suspend,
483         .bus_resume =           ohci_bus_resume,
484 #endif
485         .start_port_reset =     ohci_start_port_reset,
486 };
487
488 /*-------------------------------------------------------------------------*/
489
490 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
491 {
492         return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
493 }
494
495 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
496 {
497         struct usb_hcd          *hcd = platform_get_drvdata(dev);
498
499         usb_hcd_omap_remove(hcd, dev);
500         platform_set_drvdata(dev, NULL);
501
502         return 0;
503 }
504
505 /*-------------------------------------------------------------------------*/
506
507 #ifdef  CONFIG_PM
508
509 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
510 {
511         struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
512
513         if (time_before(jiffies, ohci->next_statechange))
514                 msleep(5);
515         ohci->next_statechange = jiffies;
516
517         omap_ohci_clock_power(0);
518         ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
519         return 0;
520 }
521
522 static int ohci_omap_resume(struct platform_device *dev)
523 {
524         struct usb_hcd  *hcd = platform_get_drvdata(dev);
525         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
526
527         if (time_before(jiffies, ohci->next_statechange))
528                 msleep(5);
529         ohci->next_statechange = jiffies;
530
531         omap_ohci_clock_power(1);
532         ohci_finish_controller_resume(hcd);
533         return 0;
534 }
535
536 #endif
537
538 /*-------------------------------------------------------------------------*/
539
540 /*
541  * Driver definition to register with the OMAP bus
542  */
543 static struct platform_driver ohci_hcd_omap_driver = {
544         .probe          = ohci_hcd_omap_drv_probe,
545         .remove         = ohci_hcd_omap_drv_remove,
546         .shutdown       = usb_hcd_platform_shutdown,
547 #ifdef  CONFIG_PM
548         .suspend        = ohci_omap_suspend,
549         .resume         = ohci_omap_resume,
550 #endif
551         .driver         = {
552                 .owner  = THIS_MODULE,
553                 .name   = "ohci",
554         },
555 };
556
557 MODULE_ALIAS("platform:ohci");