Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[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 <asm/hardware.h>
23 #include <asm/io.h>
24 #include <asm/mach-types.h>
25
26 #include <asm/arch/mux.h>
27 #include <asm/arch/irqs.h>
28 #include <asm/arch/gpio.h>
29 #include <asm/arch/fpga.h>
30 #include <asm/arch/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_ARCH_OMAP_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         }
229 #endif
230
231         omap_ohci_clock_power(1);
232
233         if (cpu_is_omap1510()) {
234                 omap_1510_local_bus_power(1);
235                 omap_1510_local_bus_init();
236         }
237
238         if ((ret = ohci_init(ohci)) < 0)
239                 return ret;
240
241         /* board-specific power switching and overcurrent support */
242         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
243                 u32     rh = roothub_a (ohci);
244
245                 /* power switching (ganged by default) */
246                 rh &= ~RH_A_NPS;
247
248                 /* TPS2045 switch for internal transceiver (port 1) */
249                 if (machine_is_omap_osk()) {
250                         ohci_to_hcd(ohci)->power_budget = 250;
251
252                         rh &= ~RH_A_NOCP;
253
254                         /* gpio9 for overcurrent detction */
255                         omap_cfg_reg(W8_1610_GPIO9);
256                         omap_request_gpio(9);
257                         omap_set_gpio_direction(9, 1 /* IN */);
258
259                         /* for paranoia's sake:  disable USB.PUEN */
260                         omap_cfg_reg(W4_USB_HIGHZ);
261                 }
262                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
263                 distrust_firmware = 0;
264         } else if (machine_is_nokia770()) {
265                 /* We require a self-powered hub, which should have
266                  * plenty of power. */
267                 ohci_to_hcd(ohci)->power_budget = 0;
268         }
269
270         /* FIXME khubd hub requests should manage power switching */
271         omap_ohci_transceiver_power(1);
272
273         /* board init will have already handled HMC and mux setup.
274          * any external transceiver should already be initialized
275          * too, so all configured ports use the right signaling now.
276          */
277
278         return 0;
279 }
280
281 static void ohci_omap_stop(struct usb_hcd *hcd)
282 {
283         dev_dbg(hcd->self.controller, "stopping USB Controller\n");
284         omap_ohci_clock_power(0);
285 }
286
287
288 /*-------------------------------------------------------------------------*/
289
290 /**
291  * usb_hcd_omap_probe - initialize OMAP-based HCDs
292  * Context: !in_interrupt()
293  *
294  * Allocates basic resources for this USB host controller, and
295  * then invokes the start() method for the HCD associated with it
296  * through the hotplug entry's driver_data.
297  */
298 static int usb_hcd_omap_probe (const struct hc_driver *driver,
299                           struct platform_device *pdev)
300 {
301         int retval, irq;
302         struct usb_hcd *hcd = 0;
303         struct ohci_hcd *ohci;
304
305         if (pdev->num_resources != 2) {
306                 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
307                        pdev->num_resources);
308                 return -ENODEV;
309         }
310
311         if (pdev->resource[0].flags != IORESOURCE_MEM
312                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
313                 printk(KERN_ERR "hcd probe: invalid resource type\n");
314                 return -ENODEV;
315         }
316
317         usb_host_ck = clk_get(0, "usb_hhc_ck");
318         if (IS_ERR(usb_host_ck))
319                 return PTR_ERR(usb_host_ck);
320
321         if (!cpu_is_omap1510())
322                 usb_dc_ck = clk_get(0, "usb_dc_ck");
323         else
324                 usb_dc_ck = clk_get(0, "lb_ck");
325
326         if (IS_ERR(usb_dc_ck)) {
327                 clk_put(usb_host_ck);
328                 return PTR_ERR(usb_dc_ck);
329         }
330
331
332         hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
333         if (!hcd) {
334                 retval = -ENOMEM;
335                 goto err0;
336         }
337         hcd->rsrc_start = pdev->resource[0].start;
338         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
339
340         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
341                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
342                 retval = -EBUSY;
343                 goto err1;
344         }
345
346         hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
347
348         ohci = hcd_to_ohci(hcd);
349         ohci_hcd_init(ohci);
350
351         host_initialized = 0;
352         host_enabled = 1;
353
354         irq = platform_get_irq(pdev, 0);
355         if (irq < 0) {
356                 retval = -ENXIO;
357                 goto err2;
358         }
359         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
360         if (retval)
361                 goto err2;
362
363         host_initialized = 1;
364
365         if (!host_enabled)
366                 omap_ohci_clock_power(0);
367
368         return 0;
369 err2:
370         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
371 err1:
372         usb_put_hcd(hcd);
373 err0:
374         clk_put(usb_dc_ck);
375         clk_put(usb_host_ck);
376         return retval;
377 }
378
379
380 /* may be called with controller, bus, and devices active */
381
382 /**
383  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
384  * @dev: USB Host Controller being removed
385  * Context: !in_interrupt()
386  *
387  * Reverses the effect of usb_hcd_omap_probe(), first invoking
388  * the HCD's stop() method.  It is always called from a thread
389  * context, normally "rmmod", "apmd", or something similar.
390  */
391 static inline void
392 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
393 {
394         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
395
396         usb_remove_hcd(hcd);
397         if (ohci->transceiver) {
398                 (void) otg_set_host(ohci->transceiver, 0);
399                 put_device(ohci->transceiver->dev);
400         }
401         if (machine_is_omap_osk())
402                 omap_free_gpio(9);
403         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
404         usb_put_hcd(hcd);
405         clk_put(usb_dc_ck);
406         clk_put(usb_host_ck);
407 }
408
409 /*-------------------------------------------------------------------------*/
410
411 static int
412 ohci_omap_start (struct usb_hcd *hcd)
413 {
414         struct omap_usb_config *config;
415         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
416         int             ret;
417
418         if (!host_enabled)
419                 return 0;
420         config = hcd->self.controller->platform_data;
421         if (config->otg || config->rwc) {
422                 ohci->hc_control = OHCI_CTRL_RWC;
423                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
424         }
425
426         if ((ret = ohci_run (ohci)) < 0) {
427                 dev_err(hcd->self.controller, "can't start\n");
428                 ohci_stop (hcd);
429                 return ret;
430         }
431         return 0;
432 }
433
434 /*-------------------------------------------------------------------------*/
435
436 static const struct hc_driver ohci_omap_hc_driver = {
437         .description =          hcd_name,
438         .product_desc =         "OMAP OHCI",
439         .hcd_priv_size =        sizeof(struct ohci_hcd),
440
441         /*
442          * generic hardware linkage
443          */
444         .irq =                  ohci_irq,
445         .flags =                HCD_USB11 | HCD_MEMORY,
446
447         /*
448          * basic lifecycle operations
449          */
450         .reset =                ohci_omap_init,
451         .start =                ohci_omap_start,
452         .stop =                 ohci_omap_stop,
453         .shutdown =             ohci_shutdown,
454
455         /*
456          * managing i/o requests and associated device resources
457          */
458         .urb_enqueue =          ohci_urb_enqueue,
459         .urb_dequeue =          ohci_urb_dequeue,
460         .endpoint_disable =     ohci_endpoint_disable,
461
462         /*
463          * scheduling support
464          */
465         .get_frame_number =     ohci_get_frame,
466
467         /*
468          * root hub support
469          */
470         .hub_status_data =      ohci_hub_status_data,
471         .hub_control =          ohci_hub_control,
472         .hub_irq_enable =       ohci_rhsc_enable,
473 #ifdef  CONFIG_PM
474         .bus_suspend =          ohci_bus_suspend,
475         .bus_resume =           ohci_bus_resume,
476 #endif
477         .start_port_reset =     ohci_start_port_reset,
478 };
479
480 /*-------------------------------------------------------------------------*/
481
482 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
483 {
484         return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
485 }
486
487 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
488 {
489         struct usb_hcd          *hcd = platform_get_drvdata(dev);
490
491         usb_hcd_omap_remove(hcd, dev);
492         platform_set_drvdata(dev, NULL);
493
494         return 0;
495 }
496
497 /*-------------------------------------------------------------------------*/
498
499 #ifdef  CONFIG_PM
500
501 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
502 {
503         struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
504
505         if (time_before(jiffies, ohci->next_statechange))
506                 msleep(5);
507         ohci->next_statechange = jiffies;
508
509         omap_ohci_clock_power(0);
510         ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
511         return 0;
512 }
513
514 static int ohci_omap_resume(struct platform_device *dev)
515 {
516         struct usb_hcd  *hcd = platform_get_drvdata(dev);
517         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
518
519         if (time_before(jiffies, ohci->next_statechange))
520                 msleep(5);
521         ohci->next_statechange = jiffies;
522
523         omap_ohci_clock_power(1);
524         ohci_finish_controller_resume(hcd);
525         return 0;
526 }
527
528 #endif
529
530 /*-------------------------------------------------------------------------*/
531
532 /*
533  * Driver definition to register with the OMAP bus
534  */
535 static struct platform_driver ohci_hcd_omap_driver = {
536         .probe          = ohci_hcd_omap_drv_probe,
537         .remove         = ohci_hcd_omap_drv_remove,
538         .shutdown       = usb_hcd_platform_shutdown,
539 #ifdef  CONFIG_PM
540         .suspend        = ohci_omap_suspend,
541         .resume         = ohci_omap_resume,
542 #endif
543         .driver         = {
544                 .owner  = THIS_MODULE,
545                 .name   = "ohci",
546         },
547 };
548
549 MODULE_ALIAS("platform:ohci");