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236dd4d1 AV |
1 | /* |
2 | * Freescale QUICC Engine USB Host Controller Driver | |
3 | * | |
4 | * Copyright (c) Freescale Semicondutor, Inc. 2006. | |
5 | * Shlomi Gridish <gridish@freescale.com> | |
6 | * Jerry Huang <Chang-Ming.Huang@freescale.com> | |
7 | * Copyright (c) Logic Product Development, Inc. 2007 | |
8 | * Peter Barada <peterb@logicpd.com> | |
9 | * Copyright (c) MontaVista Software, Inc. 2008. | |
10 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/types.h> | |
20 | #include <linux/spinlock.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/io.h> | |
27 | #include <linux/usb.h> | |
28 | #include <linux/of_platform.h> | |
29 | #include <linux/of_gpio.h> | |
30 | #include <asm/qe.h> | |
31 | #include <asm/fsl_gtm.h> | |
32 | #include "../core/hcd.h" | |
33 | #include "fhci.h" | |
34 | ||
35 | void fhci_start_sof_timer(struct fhci_hcd *fhci) | |
36 | { | |
37 | fhci_dbg(fhci, "-> %s\n", __func__); | |
38 | ||
39 | /* clear frame_n */ | |
40 | out_be16(&fhci->pram->frame_num, 0); | |
41 | ||
42 | out_be16(&fhci->regs->usb_sof_tmr, 0); | |
43 | setbits8(&fhci->regs->usb_mod, USB_MODE_SFTE); | |
44 | ||
45 | fhci_dbg(fhci, "<- %s\n", __func__); | |
46 | } | |
47 | ||
48 | void fhci_stop_sof_timer(struct fhci_hcd *fhci) | |
49 | { | |
50 | fhci_dbg(fhci, "-> %s\n", __func__); | |
51 | ||
52 | clrbits8(&fhci->regs->usb_mod, USB_MODE_SFTE); | |
53 | gtm_stop_timer16(fhci->timer); | |
54 | ||
55 | fhci_dbg(fhci, "<- %s\n", __func__); | |
56 | } | |
57 | ||
58 | u16 fhci_get_sof_timer_count(struct fhci_usb *usb) | |
59 | { | |
60 | return be16_to_cpu(in_be16(&usb->fhci->regs->usb_sof_tmr) / 12); | |
61 | } | |
62 | ||
63 | /* initialize the endpoint zero */ | |
64 | static u32 endpoint_zero_init(struct fhci_usb *usb, | |
65 | enum fhci_mem_alloc data_mem, | |
66 | u32 ring_len) | |
67 | { | |
68 | u32 rc; | |
69 | ||
70 | rc = fhci_create_ep(usb, data_mem, ring_len); | |
71 | if (rc) | |
72 | return rc; | |
73 | ||
74 | /* inilialize endpoint registers */ | |
75 | fhci_init_ep_registers(usb, usb->ep0, data_mem); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | /* enable the USB interrupts */ | |
81 | void fhci_usb_enable_interrupt(struct fhci_usb *usb) | |
82 | { | |
83 | struct fhci_hcd *fhci = usb->fhci; | |
84 | ||
85 | if (usb->intr_nesting_cnt == 1) { | |
86 | /* initialize the USB interrupt */ | |
87 | enable_irq(fhci_to_hcd(fhci)->irq); | |
88 | ||
89 | /* initialize the event register and mask register */ | |
90 | out_be16(&usb->fhci->regs->usb_event, 0xffff); | |
91 | out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); | |
92 | ||
93 | /* enable the timer interrupts */ | |
94 | enable_irq(fhci->timer->irq); | |
95 | } else if (usb->intr_nesting_cnt > 1) | |
96 | fhci_info(fhci, "unbalanced USB interrupts nesting\n"); | |
97 | usb->intr_nesting_cnt--; | |
98 | } | |
99 | ||
100 | /* diable the usb interrupt */ | |
101 | void fhci_usb_disable_interrupt(struct fhci_usb *usb) | |
102 | { | |
103 | struct fhci_hcd *fhci = usb->fhci; | |
104 | ||
105 | if (usb->intr_nesting_cnt == 0) { | |
106 | /* diable the timer interrupt */ | |
107 | disable_irq_nosync(fhci->timer->irq); | |
108 | ||
109 | /* disable the usb interrupt */ | |
110 | disable_irq_nosync(fhci_to_hcd(fhci)->irq); | |
111 | out_be16(&usb->fhci->regs->usb_mask, 0); | |
112 | } | |
113 | usb->intr_nesting_cnt++; | |
114 | } | |
115 | ||
116 | /* enable the USB controller */ | |
117 | static u32 fhci_usb_enable(struct fhci_hcd *fhci) | |
118 | { | |
119 | struct fhci_usb *usb = fhci->usb_lld; | |
120 | ||
121 | out_be16(&usb->fhci->regs->usb_event, 0xffff); | |
122 | out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); | |
123 | setbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN); | |
124 | ||
125 | mdelay(100); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | /* disable the USB controller */ | |
131 | static u32 fhci_usb_disable(struct fhci_hcd *fhci) | |
132 | { | |
133 | struct fhci_usb *usb = fhci->usb_lld; | |
134 | ||
135 | fhci_usb_disable_interrupt(usb); | |
136 | fhci_port_disable(fhci); | |
137 | ||
138 | /* disable the usb controller */ | |
139 | if (usb->port_status == FHCI_PORT_FULL || | |
140 | usb->port_status == FHCI_PORT_LOW) | |
141 | fhci_device_disconnected_interrupt(fhci); | |
142 | ||
143 | clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN); | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | /* check the bus state by polling the QE bit on the IO ports */ | |
149 | int fhci_ioports_check_bus_state(struct fhci_hcd *fhci) | |
150 | { | |
151 | u8 bits = 0; | |
152 | ||
153 | /* check USBOE,if transmitting,exit */ | |
154 | if (!gpio_get_value(fhci->gpios[GPIO_USBOE])) | |
155 | return -1; | |
156 | ||
157 | /* check USBRP */ | |
158 | if (gpio_get_value(fhci->gpios[GPIO_USBRP])) | |
159 | bits |= 0x2; | |
160 | ||
161 | /* check USBRN */ | |
162 | if (gpio_get_value(fhci->gpios[GPIO_USBRN])) | |
163 | bits |= 0x1; | |
164 | ||
165 | return bits; | |
166 | } | |
167 | ||
168 | static void fhci_mem_free(struct fhci_hcd *fhci) | |
169 | { | |
170 | struct ed *ed; | |
171 | struct ed *next_ed; | |
172 | struct td *td; | |
173 | struct td *next_td; | |
174 | ||
175 | list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) { | |
176 | list_del(&ed->node); | |
177 | kfree(ed); | |
178 | } | |
179 | ||
180 | list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) { | |
181 | list_del(&td->node); | |
182 | kfree(td); | |
183 | } | |
184 | ||
185 | kfree(fhci->vroot_hub); | |
186 | fhci->vroot_hub = NULL; | |
187 | ||
188 | kfree(fhci->hc_list); | |
189 | fhci->hc_list = NULL; | |
190 | } | |
191 | ||
192 | static int fhci_mem_init(struct fhci_hcd *fhci) | |
193 | { | |
194 | int i; | |
195 | ||
196 | fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL); | |
197 | if (!fhci->hc_list) | |
198 | goto err; | |
199 | ||
200 | INIT_LIST_HEAD(&fhci->hc_list->ctrl_list); | |
201 | INIT_LIST_HEAD(&fhci->hc_list->bulk_list); | |
202 | INIT_LIST_HEAD(&fhci->hc_list->iso_list); | |
203 | INIT_LIST_HEAD(&fhci->hc_list->intr_list); | |
204 | INIT_LIST_HEAD(&fhci->hc_list->done_list); | |
205 | ||
206 | fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL); | |
207 | if (!fhci->vroot_hub) | |
208 | goto err; | |
209 | ||
210 | INIT_LIST_HEAD(&fhci->empty_eds); | |
211 | INIT_LIST_HEAD(&fhci->empty_tds); | |
212 | ||
213 | /* initialize work queue to handle done list */ | |
214 | fhci_tasklet.data = (unsigned long)fhci; | |
215 | fhci->process_done_task = &fhci_tasklet; | |
216 | ||
217 | for (i = 0; i < MAX_TDS; i++) { | |
218 | struct td *td; | |
219 | ||
220 | td = kmalloc(sizeof(*td), GFP_KERNEL); | |
221 | if (!td) | |
222 | goto err; | |
223 | fhci_recycle_empty_td(fhci, td); | |
224 | } | |
225 | for (i = 0; i < MAX_EDS; i++) { | |
226 | struct ed *ed; | |
227 | ||
228 | ed = kmalloc(sizeof(*ed), GFP_KERNEL); | |
229 | if (!ed) | |
230 | goto err; | |
231 | fhci_recycle_empty_ed(fhci, ed); | |
232 | } | |
233 | ||
234 | fhci->active_urbs = 0; | |
235 | return 0; | |
236 | err: | |
237 | fhci_mem_free(fhci); | |
238 | return -ENOMEM; | |
239 | } | |
240 | ||
241 | /* destroy the fhci_usb structure */ | |
242 | static void fhci_usb_free(void *lld) | |
243 | { | |
244 | struct fhci_usb *usb = lld; | |
245 | struct fhci_hcd *fhci = usb->fhci; | |
246 | ||
247 | if (usb) { | |
248 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); | |
249 | fhci_ep0_free(usb); | |
250 | kfree(usb->actual_frame); | |
251 | kfree(usb); | |
252 | } | |
253 | } | |
254 | ||
255 | /* initialize the USB */ | |
256 | static int fhci_usb_init(struct fhci_hcd *fhci) | |
257 | { | |
258 | struct fhci_usb *usb = fhci->usb_lld; | |
259 | ||
260 | memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE); | |
261 | ||
262 | usb->port_status = FHCI_PORT_DISABLED; | |
263 | usb->max_frame_usage = FRAME_TIME_USAGE; | |
264 | usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION; | |
265 | ||
266 | usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL); | |
267 | if (!usb->actual_frame) { | |
268 | fhci_usb_free(usb); | |
269 | return -ENOMEM; | |
270 | } | |
271 | ||
272 | INIT_LIST_HEAD(&usb->actual_frame->tds_list); | |
273 | ||
274 | /* initializing registers on chip, clear frame number */ | |
275 | out_be16(&fhci->pram->frame_num, 0); | |
276 | ||
277 | /* clear rx state */ | |
278 | out_be32(&fhci->pram->rx_state, 0); | |
279 | ||
280 | /* set mask register */ | |
281 | usb->saved_msk = (USB_E_TXB_MASK | | |
282 | USB_E_TXE1_MASK | | |
283 | USB_E_IDLE_MASK | | |
284 | USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK); | |
285 | ||
286 | out_8(&usb->fhci->regs->usb_mod, USB_MODE_HOST | USB_MODE_EN); | |
287 | ||
288 | /* clearing the mask register */ | |
289 | out_be16(&usb->fhci->regs->usb_mask, 0); | |
290 | ||
291 | /* initialing the event register */ | |
292 | out_be16(&usb->fhci->regs->usb_event, 0xffff); | |
293 | ||
294 | if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) { | |
295 | fhci_usb_free(usb); | |
296 | return -EINVAL; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | /* initialize the fhci_usb struct and the corresponding data staruct */ | |
303 | static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci) | |
304 | { | |
305 | struct fhci_usb *usb; | |
306 | ||
307 | /* allocate memory for SCC data structure */ | |
308 | usb = kzalloc(sizeof(*usb), GFP_KERNEL); | |
309 | if (!usb) { | |
310 | fhci_err(fhci, "no memory for SCC data struct\n"); | |
311 | return NULL; | |
312 | } | |
313 | ||
314 | usb->fhci = fhci; | |
315 | usb->hc_list = fhci->hc_list; | |
316 | usb->vroot_hub = fhci->vroot_hub; | |
317 | ||
318 | usb->transfer_confirm = fhci_transfer_confirm_callback; | |
319 | ||
320 | return usb; | |
321 | } | |
322 | ||
323 | static int fhci_start(struct usb_hcd *hcd) | |
324 | { | |
325 | int ret; | |
326 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
327 | ||
328 | ret = fhci_mem_init(fhci); | |
329 | if (ret) { | |
330 | fhci_err(fhci, "failed to allocate memory\n"); | |
331 | goto err; | |
332 | } | |
333 | ||
334 | fhci->usb_lld = fhci_create_lld(fhci); | |
335 | if (!fhci->usb_lld) { | |
336 | fhci_err(fhci, "low level driver config failed\n"); | |
337 | ret = -ENOMEM; | |
338 | goto err; | |
339 | } | |
340 | ||
341 | ret = fhci_usb_init(fhci); | |
342 | if (ret) { | |
343 | fhci_err(fhci, "low level driver initialize failed\n"); | |
344 | goto err; | |
345 | } | |
346 | ||
347 | spin_lock_init(&fhci->lock); | |
348 | ||
349 | /* connect the virtual root hub */ | |
350 | fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */ | |
351 | fhci->vroot_hub->hub.wHubStatus = 0; | |
352 | fhci->vroot_hub->hub.wHubChange = 0; | |
353 | fhci->vroot_hub->port.wPortStatus = 0; | |
354 | fhci->vroot_hub->port.wPortChange = 0; | |
355 | ||
356 | hcd->state = HC_STATE_RUNNING; | |
357 | ||
358 | /* | |
359 | * From here on, khubd concurrently accesses the root | |
360 | * hub; drivers will be talking to enumerated devices. | |
361 | * (On restart paths, khubd already knows about the root | |
362 | * hub and could find work as soon as we wrote FLAG_CF.) | |
363 | * | |
364 | * Before this point the HC was idle/ready. After, khubd | |
365 | * and device drivers may start it running. | |
366 | */ | |
367 | fhci_usb_enable(fhci); | |
368 | return 0; | |
369 | err: | |
370 | fhci_mem_free(fhci); | |
371 | return ret; | |
372 | } | |
373 | ||
374 | static void fhci_stop(struct usb_hcd *hcd) | |
375 | { | |
376 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
377 | ||
378 | fhci_usb_disable_interrupt(fhci->usb_lld); | |
379 | fhci_usb_disable(fhci); | |
380 | ||
381 | fhci_usb_free(fhci->usb_lld); | |
382 | fhci->usb_lld = NULL; | |
383 | fhci_mem_free(fhci); | |
384 | } | |
385 | ||
386 | static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
387 | gfp_t mem_flags) | |
388 | { | |
389 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
390 | u32 pipe = urb->pipe; | |
391 | int ret; | |
392 | int i; | |
393 | int size = 0; | |
394 | struct urb_priv *urb_priv; | |
395 | unsigned long flags; | |
396 | ||
397 | switch (usb_pipetype(pipe)) { | |
398 | case PIPE_CONTROL: | |
399 | /* 1 td fro setup,1 for ack */ | |
400 | size = 2; | |
401 | case PIPE_BULK: | |
402 | /* one td for every 4096 bytes(can be upto 8k) */ | |
403 | size += urb->transfer_buffer_length / 4096; | |
404 | /* ...add for any remaining bytes... */ | |
405 | if ((urb->transfer_buffer_length % 4096) != 0) | |
406 | size++; | |
407 | /* ..and maybe a zero length packet to wrap it up */ | |
408 | if (size == 0) | |
409 | size++; | |
410 | else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 | |
411 | && (urb->transfer_buffer_length | |
412 | % usb_maxpacket(urb->dev, pipe, | |
413 | usb_pipeout(pipe))) != 0) | |
414 | size++; | |
415 | break; | |
416 | case PIPE_ISOCHRONOUS: | |
417 | size = urb->number_of_packets; | |
418 | if (size <= 0) | |
419 | return -EINVAL; | |
420 | for (i = 0; i < urb->number_of_packets; i++) { | |
421 | urb->iso_frame_desc[i].actual_length = 0; | |
422 | urb->iso_frame_desc[i].status = (u32) (-EXDEV); | |
423 | } | |
424 | break; | |
425 | case PIPE_INTERRUPT: | |
426 | size = 1; | |
427 | } | |
428 | ||
429 | /* allocate the private part of the URB */ | |
430 | urb_priv = kzalloc(sizeof(*urb_priv), mem_flags); | |
431 | if (!urb_priv) | |
432 | return -ENOMEM; | |
433 | ||
434 | /* allocate the private part of the URB */ | |
435 | urb_priv->tds = kzalloc(size * sizeof(struct td), mem_flags); | |
436 | if (!urb_priv->tds) { | |
437 | kfree(urb_priv); | |
438 | return -ENOMEM; | |
439 | } | |
440 | ||
441 | spin_lock_irqsave(&fhci->lock, flags); | |
442 | ||
443 | ret = usb_hcd_link_urb_to_ep(hcd, urb); | |
444 | if (ret) | |
445 | goto err; | |
446 | ||
447 | /* fill the private part of the URB */ | |
448 | urb_priv->num_of_tds = size; | |
449 | ||
450 | urb->status = -EINPROGRESS; | |
451 | urb->actual_length = 0; | |
452 | urb->error_count = 0; | |
453 | urb->hcpriv = urb_priv; | |
454 | ||
455 | fhci_queue_urb(fhci, urb); | |
456 | err: | |
457 | if (ret) { | |
458 | kfree(urb_priv->tds); | |
459 | kfree(urb_priv); | |
460 | } | |
461 | spin_unlock_irqrestore(&fhci->lock, flags); | |
462 | return ret; | |
463 | } | |
464 | ||
465 | /* dequeue FHCI URB */ | |
466 | static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
467 | { | |
468 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
469 | struct fhci_usb *usb = fhci->usb_lld; | |
470 | int ret = -EINVAL; | |
471 | unsigned long flags; | |
472 | ||
473 | if (!urb || !urb->dev || !urb->dev->bus) | |
474 | goto out; | |
475 | ||
476 | spin_lock_irqsave(&fhci->lock, flags); | |
477 | ||
478 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
479 | if (ret) | |
480 | goto out2; | |
481 | ||
482 | if (usb->port_status != FHCI_PORT_DISABLED) { | |
483 | struct urb_priv *urb_priv; | |
484 | ||
485 | /* | |
486 | * flag the urb's data for deletion in some upcoming | |
487 | * SF interrupt's delete list processing | |
488 | */ | |
489 | urb_priv = urb->hcpriv; | |
490 | ||
491 | if (!urb_priv || (urb_priv->state == URB_DEL)) | |
492 | goto out2; | |
493 | ||
494 | urb_priv->state = URB_DEL; | |
495 | ||
496 | /* already pending? */ | |
497 | urb_priv->ed->state = FHCI_ED_URB_DEL; | |
498 | } else { | |
499 | fhci_urb_complete_free(fhci, urb); | |
500 | } | |
501 | ||
502 | out2: | |
503 | spin_unlock_irqrestore(&fhci->lock, flags); | |
504 | out: | |
505 | return ret; | |
506 | } | |
507 | ||
508 | static void fhci_endpoint_disable(struct usb_hcd *hcd, | |
509 | struct usb_host_endpoint *ep) | |
510 | { | |
511 | struct fhci_hcd *fhci; | |
512 | struct ed *ed; | |
513 | unsigned long flags; | |
514 | ||
515 | fhci = hcd_to_fhci(hcd); | |
516 | spin_lock_irqsave(&fhci->lock, flags); | |
517 | ed = ep->hcpriv; | |
518 | if (ed) { | |
519 | while (ed->td_head != NULL) { | |
520 | struct td *td = fhci_remove_td_from_ed(ed); | |
521 | fhci_urb_complete_free(fhci, td->urb); | |
522 | } | |
523 | fhci_recycle_empty_ed(fhci, ed); | |
524 | ep->hcpriv = NULL; | |
525 | } | |
526 | spin_unlock_irqrestore(&fhci->lock, flags); | |
527 | } | |
528 | ||
529 | static int fhci_get_frame_number(struct usb_hcd *hcd) | |
530 | { | |
531 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
532 | ||
533 | return get_frame_num(fhci); | |
534 | } | |
535 | ||
536 | static const struct hc_driver fhci_driver = { | |
537 | .description = "fsl,usb-fhci", | |
538 | .product_desc = "FHCI HOST Controller", | |
539 | .hcd_priv_size = sizeof(struct fhci_hcd), | |
540 | ||
541 | /* generic hardware linkage */ | |
542 | .irq = fhci_irq, | |
543 | .flags = HCD_USB11 | HCD_MEMORY, | |
544 | ||
545 | /* basic lifecycle operation */ | |
546 | .start = fhci_start, | |
547 | .stop = fhci_stop, | |
548 | ||
549 | /* managing i/o requests and associated device resources */ | |
550 | .urb_enqueue = fhci_urb_enqueue, | |
551 | .urb_dequeue = fhci_urb_dequeue, | |
552 | .endpoint_disable = fhci_endpoint_disable, | |
553 | ||
554 | /* scheduling support */ | |
555 | .get_frame_number = fhci_get_frame_number, | |
556 | ||
557 | /* root hub support */ | |
558 | .hub_status_data = fhci_hub_status_data, | |
559 | .hub_control = fhci_hub_control, | |
560 | }; | |
561 | ||
562 | static int __devinit of_fhci_probe(struct of_device *ofdev, | |
563 | const struct of_device_id *ofid) | |
564 | { | |
565 | struct device *dev = &ofdev->dev; | |
566 | struct device_node *node = ofdev->node; | |
567 | struct usb_hcd *hcd; | |
568 | struct fhci_hcd *fhci; | |
569 | struct resource usb_regs; | |
570 | unsigned long pram_addr; | |
571 | unsigned int usb_irq; | |
572 | const char *sprop; | |
573 | const u32 *iprop; | |
574 | int size; | |
575 | int ret; | |
576 | int i; | |
577 | int j; | |
578 | ||
579 | if (usb_disabled()) | |
580 | return -ENODEV; | |
581 | ||
582 | sprop = of_get_property(node, "mode", NULL); | |
583 | if (sprop && strcmp(sprop, "host")) | |
584 | return -ENODEV; | |
585 | ||
6866ac9d | 586 | hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev)); |
236dd4d1 AV |
587 | if (!hcd) { |
588 | dev_err(dev, "could not create hcd\n"); | |
589 | return -ENOMEM; | |
590 | } | |
591 | ||
592 | fhci = hcd_to_fhci(hcd); | |
593 | hcd->self.controller = dev; | |
594 | dev_set_drvdata(dev, hcd); | |
595 | ||
596 | iprop = of_get_property(node, "hub-power-budget", &size); | |
597 | if (iprop && size == sizeof(*iprop)) | |
598 | hcd->power_budget = *iprop; | |
599 | ||
600 | /* FHCI registers. */ | |
601 | ret = of_address_to_resource(node, 0, &usb_regs); | |
602 | if (ret) { | |
603 | dev_err(dev, "could not get regs\n"); | |
604 | goto err_regs; | |
605 | } | |
606 | ||
607 | hcd->regs = ioremap(usb_regs.start, usb_regs.end - usb_regs.start + 1); | |
608 | if (!hcd->regs) { | |
609 | dev_err(dev, "could not ioremap regs\n"); | |
610 | ret = -ENOMEM; | |
611 | goto err_regs; | |
612 | } | |
613 | fhci->regs = hcd->regs; | |
614 | ||
615 | /* Parameter RAM. */ | |
616 | iprop = of_get_property(node, "reg", &size); | |
617 | if (!iprop || size < sizeof(*iprop) * 4) { | |
618 | dev_err(dev, "can't get pram offset\n"); | |
619 | ret = -EINVAL; | |
620 | goto err_pram; | |
621 | } | |
622 | ||
623 | pram_addr = cpm_muram_alloc_fixed(iprop[2], FHCI_PRAM_SIZE); | |
624 | if (IS_ERR_VALUE(pram_addr)) { | |
625 | dev_err(dev, "failed to allocate usb pram\n"); | |
626 | ret = -ENOMEM; | |
627 | goto err_pram; | |
628 | } | |
629 | fhci->pram = cpm_muram_addr(pram_addr); | |
630 | ||
631 | /* GPIOs and pins */ | |
632 | for (i = 0; i < NUM_GPIOS; i++) { | |
633 | int gpio; | |
634 | enum of_gpio_flags flags; | |
635 | ||
636 | gpio = of_get_gpio_flags(node, i, &flags); | |
637 | fhci->gpios[i] = gpio; | |
638 | fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW; | |
639 | ||
640 | if (!gpio_is_valid(gpio)) { | |
641 | if (i < GPIO_SPEED) { | |
642 | dev_err(dev, "incorrect GPIO%d: %d\n", | |
643 | i, gpio); | |
644 | goto err_gpios; | |
645 | } else { | |
646 | dev_info(dev, "assuming board doesn't have " | |
647 | "%s gpio\n", i == GPIO_SPEED ? | |
648 | "speed" : "power"); | |
649 | continue; | |
650 | } | |
651 | } | |
652 | ||
6866ac9d | 653 | ret = gpio_request(gpio, dev_name(dev)); |
236dd4d1 AV |
654 | if (ret) { |
655 | dev_err(dev, "failed to request gpio %d", i); | |
656 | goto err_gpios; | |
657 | } | |
658 | ||
659 | if (i >= GPIO_SPEED) { | |
660 | ret = gpio_direction_output(gpio, 0); | |
661 | if (ret) { | |
662 | dev_err(dev, "failed to set gpio %d as " | |
663 | "an output\n", i); | |
664 | i++; | |
665 | goto err_gpios; | |
666 | } | |
667 | } | |
668 | } | |
669 | ||
670 | for (j = 0; j < NUM_PINS; j++) { | |
671 | fhci->pins[j] = qe_pin_request(ofdev->node, j); | |
672 | if (IS_ERR(fhci->pins[j])) { | |
673 | ret = PTR_ERR(fhci->pins[j]); | |
674 | dev_err(dev, "can't get pin %d: %d\n", j, ret); | |
675 | goto err_pins; | |
676 | } | |
677 | } | |
678 | ||
679 | /* Frame limit timer and its interrupt. */ | |
680 | fhci->timer = gtm_get_timer16(); | |
681 | if (IS_ERR(fhci->timer)) { | |
682 | ret = PTR_ERR(fhci->timer); | |
683 | dev_err(dev, "failed to request qe timer: %i", ret); | |
684 | goto err_get_timer; | |
685 | } | |
686 | ||
687 | ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq, | |
688 | IRQF_DISABLED, "qe timer (usb)", hcd); | |
689 | if (ret) { | |
690 | dev_err(dev, "failed to request timer irq"); | |
691 | goto err_timer_irq; | |
692 | } | |
693 | ||
694 | /* USB Host interrupt. */ | |
695 | usb_irq = irq_of_parse_and_map(node, 0); | |
696 | if (usb_irq == NO_IRQ) { | |
697 | dev_err(dev, "could not get usb irq\n"); | |
698 | ret = -EINVAL; | |
699 | goto err_usb_irq; | |
700 | } | |
701 | ||
702 | /* Clocks. */ | |
703 | sprop = of_get_property(node, "fsl,fullspeed-clock", NULL); | |
704 | if (sprop) { | |
705 | fhci->fullspeed_clk = qe_clock_source(sprop); | |
706 | if (fhci->fullspeed_clk == QE_CLK_DUMMY) { | |
707 | dev_err(dev, "wrong fullspeed-clock\n"); | |
708 | ret = -EINVAL; | |
709 | goto err_clocks; | |
710 | } | |
711 | } | |
712 | ||
713 | sprop = of_get_property(node, "fsl,lowspeed-clock", NULL); | |
714 | if (sprop) { | |
715 | fhci->lowspeed_clk = qe_clock_source(sprop); | |
716 | if (fhci->lowspeed_clk == QE_CLK_DUMMY) { | |
717 | dev_err(dev, "wrong lowspeed-clock\n"); | |
718 | ret = -EINVAL; | |
719 | goto err_clocks; | |
720 | } | |
721 | } | |
722 | ||
723 | if (fhci->fullspeed_clk == QE_CLK_NONE && | |
724 | fhci->lowspeed_clk == QE_CLK_NONE) { | |
725 | dev_err(dev, "no clocks specified\n"); | |
726 | ret = -EINVAL; | |
727 | goto err_clocks; | |
728 | } | |
729 | ||
730 | dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq); | |
731 | ||
732 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); | |
733 | ||
734 | /* Start with full-speed, if possible. */ | |
735 | if (fhci->fullspeed_clk != QE_CLK_NONE) { | |
736 | fhci_config_transceiver(fhci, FHCI_PORT_FULL); | |
737 | qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK); | |
738 | } else { | |
739 | fhci_config_transceiver(fhci, FHCI_PORT_LOW); | |
740 | qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); | |
741 | } | |
742 | ||
743 | /* Clear and disable any pending interrupts. */ | |
744 | out_be16(&fhci->regs->usb_event, 0xffff); | |
745 | out_be16(&fhci->regs->usb_mask, 0); | |
746 | ||
747 | ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED); | |
748 | if (ret < 0) | |
749 | goto err_add_hcd; | |
750 | ||
751 | fhci_dfs_create(fhci); | |
752 | ||
753 | return 0; | |
754 | ||
755 | err_add_hcd: | |
756 | err_clocks: | |
757 | irq_dispose_mapping(usb_irq); | |
758 | err_usb_irq: | |
759 | free_irq(fhci->timer->irq, hcd); | |
760 | err_timer_irq: | |
761 | gtm_put_timer16(fhci->timer); | |
762 | err_get_timer: | |
763 | err_pins: | |
764 | while (--j >= 0) | |
765 | qe_pin_free(fhci->pins[j]); | |
766 | err_gpios: | |
767 | while (--i >= 0) { | |
768 | if (gpio_is_valid(fhci->gpios[i])) | |
769 | gpio_free(fhci->gpios[i]); | |
770 | } | |
771 | cpm_muram_free(pram_addr); | |
772 | err_pram: | |
773 | iounmap(hcd->regs); | |
774 | err_regs: | |
775 | usb_put_hcd(hcd); | |
776 | return ret; | |
777 | } | |
778 | ||
779 | static int __devexit fhci_remove(struct device *dev) | |
780 | { | |
781 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
782 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
783 | int i; | |
784 | int j; | |
785 | ||
786 | usb_remove_hcd(hcd); | |
787 | free_irq(fhci->timer->irq, hcd); | |
788 | gtm_put_timer16(fhci->timer); | |
789 | cpm_muram_free(cpm_muram_offset(fhci->pram)); | |
790 | for (i = 0; i < NUM_GPIOS; i++) { | |
791 | if (!gpio_is_valid(fhci->gpios[i])) | |
792 | continue; | |
793 | gpio_free(fhci->gpios[i]); | |
794 | } | |
795 | for (j = 0; j < NUM_PINS; j++) | |
796 | qe_pin_free(fhci->pins[j]); | |
797 | fhci_dfs_destroy(fhci); | |
798 | usb_put_hcd(hcd); | |
799 | return 0; | |
800 | } | |
801 | ||
802 | static int __devexit of_fhci_remove(struct of_device *ofdev) | |
803 | { | |
804 | return fhci_remove(&ofdev->dev); | |
805 | } | |
806 | ||
807 | static struct of_device_id of_fhci_match[] = { | |
808 | { .compatible = "fsl,mpc8323-qe-usb", }, | |
809 | {}, | |
810 | }; | |
811 | MODULE_DEVICE_TABLE(of, of_fhci_match); | |
812 | ||
813 | static struct of_platform_driver of_fhci_driver = { | |
814 | .name = "fsl,usb-fhci", | |
815 | .match_table = of_fhci_match, | |
816 | .probe = of_fhci_probe, | |
817 | .remove = __devexit_p(of_fhci_remove), | |
818 | }; | |
819 | ||
820 | static int __init fhci_module_init(void) | |
821 | { | |
822 | return of_register_platform_driver(&of_fhci_driver); | |
823 | } | |
824 | module_init(fhci_module_init); | |
825 | ||
826 | static void __exit fhci_module_exit(void) | |
827 | { | |
828 | of_unregister_platform_driver(&of_fhci_driver); | |
829 | } | |
830 | module_exit(fhci_module_exit); | |
831 | ||
832 | MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver"); | |
833 | MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, " | |
834 | "Jerry Huang <Chang-Ming.Huang@freescale.com>, " | |
835 | "Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
836 | MODULE_LICENSE("GPL"); |