Commit | Line | Data |
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1da177e4 LT |
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 <asm/hardware.h> | |
18 | #include <asm/io.h> | |
19 | #include <asm/mach-types.h> | |
20 | ||
21 | #include <asm/arch/hardware.h> | |
22 | #include <asm/arch/mux.h> | |
23 | #include <asm/arch/irqs.h> | |
24 | #include <asm/arch/gpio.h> | |
25 | #include <asm/arch/fpga.h> | |
26 | #include <asm/arch/usb.h> | |
27 | #include <asm/hardware/clock.h> | |
28 | ||
29 | ||
30 | /* OMAP-1510 OHCI has its own MMU for DMA */ | |
31 | #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */ | |
32 | #define OMAP1510_LB_CLOCK_DIV 0xfffec10c | |
33 | #define OMAP1510_LB_MMU_CTL 0xfffec208 | |
34 | #define OMAP1510_LB_MMU_LCK 0xfffec224 | |
35 | #define OMAP1510_LB_MMU_LD_TLB 0xfffec228 | |
36 | #define OMAP1510_LB_MMU_CAM_H 0xfffec22c | |
37 | #define OMAP1510_LB_MMU_CAM_L 0xfffec230 | |
38 | #define OMAP1510_LB_MMU_RAM_H 0xfffec234 | |
39 | #define OMAP1510_LB_MMU_RAM_L 0xfffec238 | |
40 | ||
41 | ||
42 | #ifndef CONFIG_ARCH_OMAP | |
43 | #error "This file is OMAP bus glue. CONFIG_OMAP must be defined." | |
44 | #endif | |
45 | ||
46 | #ifdef CONFIG_TPS65010 | |
47 | #include <asm/arch/tps65010.h> | |
48 | #else | |
49 | ||
50 | #define LOW 0 | |
51 | #define HIGH 1 | |
52 | ||
53 | #define GPIO1 1 | |
54 | ||
55 | static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) | |
56 | { | |
57 | return 0; | |
58 | } | |
59 | ||
60 | #endif | |
61 | ||
62 | extern int usb_disabled(void); | |
63 | extern int ocpi_enable(void); | |
64 | ||
65 | static struct clk *usb_host_ck; | |
66 | ||
67 | static void omap_ohci_clock_power(int on) | |
68 | { | |
69 | if (on) { | |
70 | clk_enable(usb_host_ck); | |
71 | /* guesstimate for T5 == 1x 32K clock + APLL lock time */ | |
72 | udelay(100); | |
73 | } else { | |
74 | clk_disable(usb_host_ck); | |
75 | } | |
76 | } | |
77 | ||
78 | /* | |
79 | * Board specific gang-switched transceiver power on/off. | |
80 | * NOTE: OSK supplies power from DC, not battery. | |
81 | */ | |
82 | static int omap_ohci_transceiver_power(int on) | |
83 | { | |
84 | if (on) { | |
85 | if (machine_is_omap_innovator() && cpu_is_omap1510()) | |
86 | fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL) | |
87 | | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), | |
88 | INNOVATOR_FPGA_CAM_USB_CONTROL); | |
89 | else if (machine_is_omap_osk()) | |
90 | tps65010_set_gpio_out_value(GPIO1, LOW); | |
91 | } else { | |
92 | if (machine_is_omap_innovator() && cpu_is_omap1510()) | |
93 | fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL) | |
94 | & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), | |
95 | INNOVATOR_FPGA_CAM_USB_CONTROL); | |
96 | else if (machine_is_omap_osk()) | |
97 | tps65010_set_gpio_out_value(GPIO1, HIGH); | |
98 | } | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | /* | |
104 | * OMAP-1510 specific Local Bus clock on/off | |
105 | */ | |
106 | static int omap_1510_local_bus_power(int on) | |
107 | { | |
108 | if (on) { | |
109 | omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL); | |
110 | udelay(200); | |
111 | } else { | |
112 | omap_writel(0, OMAP1510_LB_MMU_CTL); | |
113 | } | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | /* | |
119 | * OMAP-1510 specific Local Bus initialization | |
120 | * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE. | |
121 | * See also arch/mach-omap/memory.h for __virt_to_dma() and | |
122 | * __dma_to_virt() which need to match with the physical | |
123 | * Local Bus address below. | |
124 | */ | |
125 | static int omap_1510_local_bus_init(void) | |
126 | { | |
127 | unsigned int tlb; | |
128 | unsigned long lbaddr, physaddr; | |
129 | ||
130 | omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4, | |
131 | OMAP1510_LB_CLOCK_DIV); | |
132 | ||
133 | /* Configure the Local Bus MMU table */ | |
134 | for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) { | |
135 | lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET; | |
136 | physaddr = tlb * 0x00100000 + PHYS_OFFSET; | |
137 | omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H); | |
138 | omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc, | |
139 | OMAP1510_LB_MMU_CAM_L); | |
140 | omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H); | |
141 | omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L); | |
142 | omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK); | |
143 | omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB); | |
144 | } | |
145 | ||
146 | /* Enable the walking table */ | |
147 | omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL); | |
148 | udelay(200); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | #ifdef CONFIG_USB_OTG | |
154 | ||
155 | static void start_hnp(struct ohci_hcd *ohci) | |
156 | { | |
157 | const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1; | |
158 | unsigned long flags; | |
159 | ||
160 | otg_start_hnp(ohci->transceiver); | |
161 | ||
162 | local_irq_save(flags); | |
163 | ohci->transceiver->state = OTG_STATE_A_SUSPEND; | |
164 | writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]); | |
165 | OTG_CTRL_REG &= ~OTG_A_BUSREQ; | |
166 | local_irq_restore(flags); | |
167 | } | |
168 | ||
169 | #endif | |
170 | ||
171 | /*-------------------------------------------------------------------------*/ | |
172 | ||
173 | static int omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev) | |
174 | { | |
175 | struct omap_usb_config *config = pdev->dev.platform_data; | |
176 | int need_transceiver = (config->otg != 0); | |
177 | int ret; | |
178 | ||
179 | dev_dbg(&pdev->dev, "starting USB Controller\n"); | |
180 | ||
181 | if (config->otg) { | |
182 | ohci_to_hcd(ohci)->self.otg_port = config->otg; | |
183 | /* default/minimum OTG power budget: 8 mA */ | |
bc96c0ad | 184 | ohci_to_hcd(ohci)->power_budget = 8; |
1da177e4 LT |
185 | } |
186 | ||
187 | /* boards can use OTG transceivers in non-OTG modes */ | |
188 | need_transceiver = need_transceiver | |
189 | || machine_is_omap_h2() || machine_is_omap_h3(); | |
190 | ||
191 | if (cpu_is_omap16xx()) | |
192 | ocpi_enable(); | |
193 | ||
194 | #ifdef CONFIG_ARCH_OMAP_OTG | |
195 | if (need_transceiver) { | |
196 | ohci->transceiver = otg_get_transceiver(); | |
197 | if (ohci->transceiver) { | |
198 | int status = otg_set_host(ohci->transceiver, | |
199 | &ohci_to_hcd(ohci)->self); | |
200 | dev_dbg(&pdev->dev, "init %s transceiver, status %d\n", | |
201 | ohci->transceiver->label, status); | |
202 | if (status) { | |
203 | if (ohci->transceiver) | |
204 | put_device(ohci->transceiver->dev); | |
205 | return status; | |
206 | } | |
207 | } else { | |
208 | dev_err(&pdev->dev, "can't find transceiver\n"); | |
209 | return -ENODEV; | |
210 | } | |
211 | } | |
212 | #endif | |
213 | ||
214 | omap_ohci_clock_power(1); | |
215 | ||
216 | if (cpu_is_omap1510()) { | |
217 | omap_1510_local_bus_power(1); | |
218 | omap_1510_local_bus_init(); | |
219 | } | |
220 | ||
221 | if ((ret = ohci_init(ohci)) < 0) | |
222 | return ret; | |
223 | ||
224 | /* board-specific power switching and overcurrent support */ | |
225 | if (machine_is_omap_osk() || machine_is_omap_innovator()) { | |
226 | u32 rh = roothub_a (ohci); | |
227 | ||
228 | /* power switching (ganged by default) */ | |
229 | rh &= ~RH_A_NPS; | |
230 | ||
231 | /* TPS2045 switch for internal transceiver (port 1) */ | |
232 | if (machine_is_omap_osk()) { | |
bc96c0ad | 233 | ohci_to_hcd(ohci)->power_budget = 250; |
1da177e4 LT |
234 | |
235 | rh &= ~RH_A_NOCP; | |
236 | ||
237 | /* gpio9 for overcurrent detction */ | |
238 | omap_cfg_reg(W8_1610_GPIO9); | |
239 | omap_request_gpio(9); | |
240 | omap_set_gpio_direction(9, 1 /* IN */); | |
241 | ||
242 | /* for paranoia's sake: disable USB.PUEN */ | |
243 | omap_cfg_reg(W4_USB_HIGHZ); | |
244 | } | |
245 | ohci_writel(ohci, rh, &ohci->regs->roothub.a); | |
246 | distrust_firmware = 0; | |
247 | } | |
248 | ||
249 | /* FIXME khubd hub requests should manage power switching */ | |
250 | omap_ohci_transceiver_power(1); | |
251 | ||
252 | /* board init will have already handled HMC and mux setup. | |
253 | * any external transceiver should already be initialized | |
254 | * too, so all configured ports use the right signaling now. | |
255 | */ | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static void omap_stop_hc(struct platform_device *pdev) | |
261 | { | |
262 | dev_dbg(&pdev->dev, "stopping USB Controller\n"); | |
263 | omap_ohci_clock_power(0); | |
264 | } | |
265 | ||
266 | ||
267 | /*-------------------------------------------------------------------------*/ | |
268 | ||
269 | void usb_hcd_omap_remove (struct usb_hcd *, struct platform_device *); | |
270 | ||
271 | /* configure so an HC device and id are always provided */ | |
272 | /* always called with process context; sleeping is OK */ | |
273 | ||
274 | ||
275 | /** | |
276 | * usb_hcd_omap_probe - initialize OMAP-based HCDs | |
277 | * Context: !in_interrupt() | |
278 | * | |
279 | * Allocates basic resources for this USB host controller, and | |
280 | * then invokes the start() method for the HCD associated with it | |
281 | * through the hotplug entry's driver_data. | |
282 | */ | |
283 | int usb_hcd_omap_probe (const struct hc_driver *driver, | |
284 | struct platform_device *pdev) | |
285 | { | |
286 | int retval; | |
287 | struct usb_hcd *hcd = 0; | |
288 | struct ohci_hcd *ohci; | |
289 | ||
290 | if (pdev->num_resources != 2) { | |
291 | printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", | |
292 | pdev->num_resources); | |
293 | return -ENODEV; | |
294 | } | |
295 | ||
296 | if (pdev->resource[0].flags != IORESOURCE_MEM | |
297 | || pdev->resource[1].flags != IORESOURCE_IRQ) { | |
298 | printk(KERN_ERR "hcd probe: invalid resource type\n"); | |
299 | return -ENODEV; | |
300 | } | |
301 | ||
302 | usb_host_ck = clk_get(0, "usb_hhc_ck"); | |
303 | if (IS_ERR(usb_host_ck)) | |
304 | return PTR_ERR(usb_host_ck); | |
305 | ||
306 | hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id); | |
307 | if (!hcd) { | |
308 | retval = -ENOMEM; | |
309 | goto err0; | |
310 | } | |
311 | hcd->rsrc_start = pdev->resource[0].start; | |
312 | hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; | |
313 | ||
314 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
315 | dev_dbg(&pdev->dev, "request_mem_region failed\n"); | |
316 | retval = -EBUSY; | |
317 | goto err1; | |
318 | } | |
319 | ||
320 | hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start); | |
321 | ||
322 | ohci = hcd_to_ohci(hcd); | |
323 | ohci_hcd_init(ohci); | |
324 | ||
325 | retval = omap_start_hc(ohci, pdev); | |
326 | if (retval < 0) | |
327 | goto err2; | |
328 | ||
329 | retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), SA_INTERRUPT); | |
330 | if (retval == 0) | |
331 | return retval; | |
332 | ||
333 | omap_stop_hc(pdev); | |
334 | err2: | |
335 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
336 | err1: | |
337 | usb_put_hcd(hcd); | |
338 | err0: | |
339 | clk_put(usb_host_ck); | |
340 | return retval; | |
341 | } | |
342 | ||
343 | ||
344 | /* may be called with controller, bus, and devices active */ | |
345 | ||
346 | /** | |
347 | * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs | |
348 | * @dev: USB Host Controller being removed | |
349 | * Context: !in_interrupt() | |
350 | * | |
351 | * Reverses the effect of usb_hcd_omap_probe(), first invoking | |
352 | * the HCD's stop() method. It is always called from a thread | |
353 | * context, normally "rmmod", "apmd", or something similar. | |
354 | * | |
355 | */ | |
356 | void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) | |
357 | { | |
358 | usb_remove_hcd(hcd); | |
359 | if (machine_is_omap_osk()) | |
360 | omap_free_gpio(9); | |
361 | omap_stop_hc(pdev); | |
362 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
363 | usb_put_hcd(hcd); | |
364 | clk_put(usb_host_ck); | |
365 | } | |
366 | ||
367 | /*-------------------------------------------------------------------------*/ | |
368 | ||
369 | static int __devinit | |
370 | ohci_omap_start (struct usb_hcd *hcd) | |
371 | { | |
372 | struct omap_usb_config *config; | |
373 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
374 | int ret; | |
375 | ||
376 | config = hcd->self.controller->platform_data; | |
377 | if (config->otg || config->rwc) | |
378 | writel(OHCI_CTRL_RWC, &ohci->regs->control); | |
379 | ||
380 | if ((ret = ohci_run (ohci)) < 0) { | |
381 | dev_err(hcd->self.controller, "can't start\n"); | |
382 | ohci_stop (hcd); | |
383 | return ret; | |
384 | } | |
385 | return 0; | |
386 | } | |
387 | ||
388 | /*-------------------------------------------------------------------------*/ | |
389 | ||
390 | static const struct hc_driver ohci_omap_hc_driver = { | |
391 | .description = hcd_name, | |
392 | .product_desc = "OMAP OHCI", | |
393 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
394 | ||
395 | /* | |
396 | * generic hardware linkage | |
397 | */ | |
398 | .irq = ohci_irq, | |
399 | .flags = HCD_USB11 | HCD_MEMORY, | |
400 | ||
401 | /* | |
402 | * basic lifecycle operations | |
403 | */ | |
404 | .start = ohci_omap_start, | |
405 | .stop = ohci_stop, | |
406 | ||
407 | /* | |
408 | * managing i/o requests and associated device resources | |
409 | */ | |
410 | .urb_enqueue = ohci_urb_enqueue, | |
411 | .urb_dequeue = ohci_urb_dequeue, | |
412 | .endpoint_disable = ohci_endpoint_disable, | |
413 | ||
414 | /* | |
415 | * scheduling support | |
416 | */ | |
417 | .get_frame_number = ohci_get_frame, | |
418 | ||
419 | /* | |
420 | * root hub support | |
421 | */ | |
422 | .hub_status_data = ohci_hub_status_data, | |
423 | .hub_control = ohci_hub_control, | |
424 | #ifdef CONFIG_USB_SUSPEND | |
425 | .hub_suspend = ohci_hub_suspend, | |
426 | .hub_resume = ohci_hub_resume, | |
427 | #endif | |
428 | .start_port_reset = ohci_start_port_reset, | |
429 | }; | |
430 | ||
431 | /*-------------------------------------------------------------------------*/ | |
432 | ||
433 | static int ohci_hcd_omap_drv_probe(struct device *dev) | |
434 | { | |
435 | return usb_hcd_omap_probe(&ohci_omap_hc_driver, | |
436 | to_platform_device(dev)); | |
437 | } | |
438 | ||
439 | static int ohci_hcd_omap_drv_remove(struct device *dev) | |
440 | { | |
441 | struct platform_device *pdev = to_platform_device(dev); | |
442 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
443 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
444 | ||
445 | usb_hcd_omap_remove(hcd, pdev); | |
446 | if (ohci->transceiver) { | |
447 | (void) otg_set_host(ohci->transceiver, 0); | |
448 | put_device(ohci->transceiver->dev); | |
449 | } | |
450 | dev_set_drvdata(dev, NULL); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | /*-------------------------------------------------------------------------*/ | |
456 | ||
457 | #ifdef CONFIG_PM | |
458 | ||
b404a5b0 | 459 | static int ohci_omap_suspend(struct device *dev, pm_message_t message, u32 level) |
1da177e4 LT |
460 | { |
461 | struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev)); | |
462 | int status = -EINVAL; | |
463 | ||
464 | if (level != SUSPEND_POWER_DOWN) | |
465 | return 0; | |
1da177e4 | 466 | |
1da177e4 LT |
467 | down(&ohci_to_hcd(ohci)->self.root_hub->serialize); |
468 | status = ohci_hub_suspend(ohci_to_hcd(ohci)); | |
469 | if (status == 0) { | |
b404a5b0 | 470 | omap_ohci_clock_power(0); |
471 | ohci_to_hcd(ohci)->self.root_hub->state = | |
472 | USB_STATE_SUSPENDED; | |
1da177e4 | 473 | ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED; |
b404a5b0 | 474 | dev->power.power_state = PMSG_SUSPEND; |
1da177e4 LT |
475 | } |
476 | up(&ohci_to_hcd(ohci)->self.root_hub->serialize); | |
477 | return status; | |
478 | } | |
479 | ||
480 | static int ohci_omap_resume(struct device *dev, u32 level) | |
481 | { | |
482 | struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev)); | |
483 | int status = 0; | |
484 | ||
485 | if (level != RESUME_POWER_ON) | |
486 | return 0; | |
487 | ||
b404a5b0 | 488 | if (time_before(jiffies, ohci->next_statechange)) |
489 | msleep(5); | |
490 | ohci->next_statechange = jiffies; | |
491 | omap_ohci_clock_power(1); | |
1da177e4 | 492 | #ifdef CONFIG_USB_SUSPEND |
b404a5b0 | 493 | /* get extra cleanup even if remote wakeup isn't in use */ |
494 | status = usb_resume_device(ohci_to_hcd(ohci)->self.root_hub); | |
1da177e4 | 495 | #else |
b404a5b0 | 496 | down(&ohci_to_hcd(ohci)->self.root_hub->serialize); |
497 | status = ohci_hub_resume(ohci_to_hcd(ohci)); | |
498 | up(&ohci_to_hcd(ohci)->self.root_hub->serialize); | |
1da177e4 | 499 | #endif |
b404a5b0 | 500 | if (status == 0) |
501 | dev->power.power_state = PMSG_ON; | |
1da177e4 LT |
502 | return status; |
503 | } | |
504 | ||
505 | #endif | |
506 | ||
507 | /*-------------------------------------------------------------------------*/ | |
508 | ||
509 | /* | |
510 | * Driver definition to register with the OMAP bus | |
511 | */ | |
512 | static struct device_driver ohci_hcd_omap_driver = { | |
513 | .name = "ohci", | |
514 | .bus = &platform_bus_type, | |
515 | .probe = ohci_hcd_omap_drv_probe, | |
516 | .remove = ohci_hcd_omap_drv_remove, | |
517 | #ifdef CONFIG_PM | |
518 | .suspend = ohci_omap_suspend, | |
519 | .resume = ohci_omap_resume, | |
520 | #endif | |
521 | }; | |
522 | ||
523 | static int __init ohci_hcd_omap_init (void) | |
524 | { | |
525 | printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name); | |
526 | if (usb_disabled()) | |
527 | return -ENODEV; | |
528 | ||
529 | pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name, | |
530 | sizeof (struct ed), sizeof (struct td)); | |
531 | ||
532 | return driver_register(&ohci_hcd_omap_driver); | |
533 | } | |
534 | ||
535 | static void __exit ohci_hcd_omap_cleanup (void) | |
536 | { | |
537 | driver_unregister(&ohci_hcd_omap_driver); | |
538 | } | |
539 | ||
540 | module_init (ohci_hcd_omap_init); | |
541 | module_exit (ohci_hcd_omap_cleanup); |