Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
236dd4d1 AV |
31 | #include <asm/qe.h> |
32 | #include <asm/fsl_gtm.h> | |
33 | #include "../core/hcd.h" | |
34 | #include "fhci.h" | |
35 | ||
36 | void fhci_start_sof_timer(struct fhci_hcd *fhci) | |
37 | { | |
38 | fhci_dbg(fhci, "-> %s\n", __func__); | |
39 | ||
40 | /* clear frame_n */ | |
41 | out_be16(&fhci->pram->frame_num, 0); | |
42 | ||
43 | out_be16(&fhci->regs->usb_sof_tmr, 0); | |
44 | setbits8(&fhci->regs->usb_mod, USB_MODE_SFTE); | |
45 | ||
46 | fhci_dbg(fhci, "<- %s\n", __func__); | |
47 | } | |
48 | ||
49 | void fhci_stop_sof_timer(struct fhci_hcd *fhci) | |
50 | { | |
51 | fhci_dbg(fhci, "-> %s\n", __func__); | |
52 | ||
53 | clrbits8(&fhci->regs->usb_mod, USB_MODE_SFTE); | |
54 | gtm_stop_timer16(fhci->timer); | |
55 | ||
56 | fhci_dbg(fhci, "<- %s\n", __func__); | |
57 | } | |
58 | ||
59 | u16 fhci_get_sof_timer_count(struct fhci_usb *usb) | |
60 | { | |
61 | return be16_to_cpu(in_be16(&usb->fhci->regs->usb_sof_tmr) / 12); | |
62 | } | |
63 | ||
64 | /* initialize the endpoint zero */ | |
65 | static u32 endpoint_zero_init(struct fhci_usb *usb, | |
66 | enum fhci_mem_alloc data_mem, | |
67 | u32 ring_len) | |
68 | { | |
69 | u32 rc; | |
70 | ||
71 | rc = fhci_create_ep(usb, data_mem, ring_len); | |
72 | if (rc) | |
73 | return rc; | |
74 | ||
75 | /* inilialize endpoint registers */ | |
76 | fhci_init_ep_registers(usb, usb->ep0, data_mem); | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | /* enable the USB interrupts */ | |
82 | void fhci_usb_enable_interrupt(struct fhci_usb *usb) | |
83 | { | |
84 | struct fhci_hcd *fhci = usb->fhci; | |
85 | ||
86 | if (usb->intr_nesting_cnt == 1) { | |
87 | /* initialize the USB interrupt */ | |
88 | enable_irq(fhci_to_hcd(fhci)->irq); | |
89 | ||
90 | /* initialize the event register and mask register */ | |
91 | out_be16(&usb->fhci->regs->usb_event, 0xffff); | |
92 | out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); | |
93 | ||
94 | /* enable the timer interrupts */ | |
95 | enable_irq(fhci->timer->irq); | |
96 | } else if (usb->intr_nesting_cnt > 1) | |
97 | fhci_info(fhci, "unbalanced USB interrupts nesting\n"); | |
98 | usb->intr_nesting_cnt--; | |
99 | } | |
100 | ||
101 | /* diable the usb interrupt */ | |
102 | void fhci_usb_disable_interrupt(struct fhci_usb *usb) | |
103 | { | |
104 | struct fhci_hcd *fhci = usb->fhci; | |
105 | ||
106 | if (usb->intr_nesting_cnt == 0) { | |
107 | /* diable the timer interrupt */ | |
108 | disable_irq_nosync(fhci->timer->irq); | |
109 | ||
110 | /* disable the usb interrupt */ | |
111 | disable_irq_nosync(fhci_to_hcd(fhci)->irq); | |
112 | out_be16(&usb->fhci->regs->usb_mask, 0); | |
113 | } | |
114 | usb->intr_nesting_cnt++; | |
115 | } | |
116 | ||
117 | /* enable the USB controller */ | |
118 | static u32 fhci_usb_enable(struct fhci_hcd *fhci) | |
119 | { | |
120 | struct fhci_usb *usb = fhci->usb_lld; | |
121 | ||
122 | out_be16(&usb->fhci->regs->usb_event, 0xffff); | |
123 | out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk); | |
124 | setbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN); | |
125 | ||
126 | mdelay(100); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | /* disable the USB controller */ | |
132 | static u32 fhci_usb_disable(struct fhci_hcd *fhci) | |
133 | { | |
134 | struct fhci_usb *usb = fhci->usb_lld; | |
135 | ||
136 | fhci_usb_disable_interrupt(usb); | |
137 | fhci_port_disable(fhci); | |
138 | ||
139 | /* disable the usb controller */ | |
140 | if (usb->port_status == FHCI_PORT_FULL || | |
141 | usb->port_status == FHCI_PORT_LOW) | |
142 | fhci_device_disconnected_interrupt(fhci); | |
143 | ||
144 | clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | /* check the bus state by polling the QE bit on the IO ports */ | |
150 | int fhci_ioports_check_bus_state(struct fhci_hcd *fhci) | |
151 | { | |
152 | u8 bits = 0; | |
153 | ||
154 | /* check USBOE,if transmitting,exit */ | |
155 | if (!gpio_get_value(fhci->gpios[GPIO_USBOE])) | |
156 | return -1; | |
157 | ||
158 | /* check USBRP */ | |
159 | if (gpio_get_value(fhci->gpios[GPIO_USBRP])) | |
160 | bits |= 0x2; | |
161 | ||
162 | /* check USBRN */ | |
163 | if (gpio_get_value(fhci->gpios[GPIO_USBRN])) | |
164 | bits |= 0x1; | |
165 | ||
166 | return bits; | |
167 | } | |
168 | ||
169 | static void fhci_mem_free(struct fhci_hcd *fhci) | |
170 | { | |
171 | struct ed *ed; | |
172 | struct ed *next_ed; | |
173 | struct td *td; | |
174 | struct td *next_td; | |
175 | ||
176 | list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) { | |
177 | list_del(&ed->node); | |
178 | kfree(ed); | |
179 | } | |
180 | ||
181 | list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) { | |
182 | list_del(&td->node); | |
183 | kfree(td); | |
184 | } | |
185 | ||
186 | kfree(fhci->vroot_hub); | |
187 | fhci->vroot_hub = NULL; | |
188 | ||
189 | kfree(fhci->hc_list); | |
190 | fhci->hc_list = NULL; | |
191 | } | |
192 | ||
193 | static int fhci_mem_init(struct fhci_hcd *fhci) | |
194 | { | |
195 | int i; | |
196 | ||
197 | fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL); | |
198 | if (!fhci->hc_list) | |
199 | goto err; | |
200 | ||
201 | INIT_LIST_HEAD(&fhci->hc_list->ctrl_list); | |
202 | INIT_LIST_HEAD(&fhci->hc_list->bulk_list); | |
203 | INIT_LIST_HEAD(&fhci->hc_list->iso_list); | |
204 | INIT_LIST_HEAD(&fhci->hc_list->intr_list); | |
205 | INIT_LIST_HEAD(&fhci->hc_list->done_list); | |
206 | ||
207 | fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL); | |
208 | if (!fhci->vroot_hub) | |
209 | goto err; | |
210 | ||
211 | INIT_LIST_HEAD(&fhci->empty_eds); | |
212 | INIT_LIST_HEAD(&fhci->empty_tds); | |
213 | ||
214 | /* initialize work queue to handle done list */ | |
215 | fhci_tasklet.data = (unsigned long)fhci; | |
216 | fhci->process_done_task = &fhci_tasklet; | |
217 | ||
218 | for (i = 0; i < MAX_TDS; i++) { | |
219 | struct td *td; | |
220 | ||
221 | td = kmalloc(sizeof(*td), GFP_KERNEL); | |
222 | if (!td) | |
223 | goto err; | |
224 | fhci_recycle_empty_td(fhci, td); | |
225 | } | |
226 | for (i = 0; i < MAX_EDS; i++) { | |
227 | struct ed *ed; | |
228 | ||
229 | ed = kmalloc(sizeof(*ed), GFP_KERNEL); | |
230 | if (!ed) | |
231 | goto err; | |
232 | fhci_recycle_empty_ed(fhci, ed); | |
233 | } | |
234 | ||
235 | fhci->active_urbs = 0; | |
236 | return 0; | |
237 | err: | |
238 | fhci_mem_free(fhci); | |
239 | return -ENOMEM; | |
240 | } | |
241 | ||
242 | /* destroy the fhci_usb structure */ | |
243 | static void fhci_usb_free(void *lld) | |
244 | { | |
245 | struct fhci_usb *usb = lld; | |
ae35fe9e | 246 | struct fhci_hcd *fhci; |
236dd4d1 AV |
247 | |
248 | if (usb) { | |
ae35fe9e | 249 | fhci = usb->fhci; |
236dd4d1 AV |
250 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); |
251 | fhci_ep0_free(usb); | |
252 | kfree(usb->actual_frame); | |
253 | kfree(usb); | |
254 | } | |
255 | } | |
256 | ||
257 | /* initialize the USB */ | |
258 | static int fhci_usb_init(struct fhci_hcd *fhci) | |
259 | { | |
260 | struct fhci_usb *usb = fhci->usb_lld; | |
261 | ||
262 | memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE); | |
263 | ||
264 | usb->port_status = FHCI_PORT_DISABLED; | |
265 | usb->max_frame_usage = FRAME_TIME_USAGE; | |
266 | usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION; | |
267 | ||
268 | usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL); | |
269 | if (!usb->actual_frame) { | |
270 | fhci_usb_free(usb); | |
271 | return -ENOMEM; | |
272 | } | |
273 | ||
274 | INIT_LIST_HEAD(&usb->actual_frame->tds_list); | |
275 | ||
276 | /* initializing registers on chip, clear frame number */ | |
277 | out_be16(&fhci->pram->frame_num, 0); | |
278 | ||
279 | /* clear rx state */ | |
280 | out_be32(&fhci->pram->rx_state, 0); | |
281 | ||
282 | /* set mask register */ | |
283 | usb->saved_msk = (USB_E_TXB_MASK | | |
284 | USB_E_TXE1_MASK | | |
285 | USB_E_IDLE_MASK | | |
286 | USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK); | |
287 | ||
288 | out_8(&usb->fhci->regs->usb_mod, USB_MODE_HOST | USB_MODE_EN); | |
289 | ||
290 | /* clearing the mask register */ | |
291 | out_be16(&usb->fhci->regs->usb_mask, 0); | |
292 | ||
293 | /* initialing the event register */ | |
294 | out_be16(&usb->fhci->regs->usb_event, 0xffff); | |
295 | ||
296 | if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) { | |
297 | fhci_usb_free(usb); | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | /* initialize the fhci_usb struct and the corresponding data staruct */ | |
305 | static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci) | |
306 | { | |
307 | struct fhci_usb *usb; | |
308 | ||
309 | /* allocate memory for SCC data structure */ | |
310 | usb = kzalloc(sizeof(*usb), GFP_KERNEL); | |
311 | if (!usb) { | |
312 | fhci_err(fhci, "no memory for SCC data struct\n"); | |
313 | return NULL; | |
314 | } | |
315 | ||
316 | usb->fhci = fhci; | |
317 | usb->hc_list = fhci->hc_list; | |
318 | usb->vroot_hub = fhci->vroot_hub; | |
319 | ||
320 | usb->transfer_confirm = fhci_transfer_confirm_callback; | |
321 | ||
322 | return usb; | |
323 | } | |
324 | ||
325 | static int fhci_start(struct usb_hcd *hcd) | |
326 | { | |
327 | int ret; | |
328 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
329 | ||
330 | ret = fhci_mem_init(fhci); | |
331 | if (ret) { | |
332 | fhci_err(fhci, "failed to allocate memory\n"); | |
333 | goto err; | |
334 | } | |
335 | ||
336 | fhci->usb_lld = fhci_create_lld(fhci); | |
337 | if (!fhci->usb_lld) { | |
338 | fhci_err(fhci, "low level driver config failed\n"); | |
339 | ret = -ENOMEM; | |
340 | goto err; | |
341 | } | |
342 | ||
343 | ret = fhci_usb_init(fhci); | |
344 | if (ret) { | |
345 | fhci_err(fhci, "low level driver initialize failed\n"); | |
346 | goto err; | |
347 | } | |
348 | ||
349 | spin_lock_init(&fhci->lock); | |
350 | ||
351 | /* connect the virtual root hub */ | |
352 | fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */ | |
353 | fhci->vroot_hub->hub.wHubStatus = 0; | |
354 | fhci->vroot_hub->hub.wHubChange = 0; | |
355 | fhci->vroot_hub->port.wPortStatus = 0; | |
356 | fhci->vroot_hub->port.wPortChange = 0; | |
357 | ||
358 | hcd->state = HC_STATE_RUNNING; | |
359 | ||
360 | /* | |
361 | * From here on, khubd concurrently accesses the root | |
362 | * hub; drivers will be talking to enumerated devices. | |
363 | * (On restart paths, khubd already knows about the root | |
364 | * hub and could find work as soon as we wrote FLAG_CF.) | |
365 | * | |
366 | * Before this point the HC was idle/ready. After, khubd | |
367 | * and device drivers may start it running. | |
368 | */ | |
369 | fhci_usb_enable(fhci); | |
370 | return 0; | |
371 | err: | |
372 | fhci_mem_free(fhci); | |
373 | return ret; | |
374 | } | |
375 | ||
376 | static void fhci_stop(struct usb_hcd *hcd) | |
377 | { | |
378 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
379 | ||
380 | fhci_usb_disable_interrupt(fhci->usb_lld); | |
381 | fhci_usb_disable(fhci); | |
382 | ||
383 | fhci_usb_free(fhci->usb_lld); | |
384 | fhci->usb_lld = NULL; | |
385 | fhci_mem_free(fhci); | |
386 | } | |
387 | ||
388 | static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
389 | gfp_t mem_flags) | |
390 | { | |
391 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
392 | u32 pipe = urb->pipe; | |
393 | int ret; | |
394 | int i; | |
395 | int size = 0; | |
396 | struct urb_priv *urb_priv; | |
397 | unsigned long flags; | |
398 | ||
399 | switch (usb_pipetype(pipe)) { | |
400 | case PIPE_CONTROL: | |
401 | /* 1 td fro setup,1 for ack */ | |
402 | size = 2; | |
403 | case PIPE_BULK: | |
404 | /* one td for every 4096 bytes(can be upto 8k) */ | |
405 | size += urb->transfer_buffer_length / 4096; | |
406 | /* ...add for any remaining bytes... */ | |
407 | if ((urb->transfer_buffer_length % 4096) != 0) | |
408 | size++; | |
409 | /* ..and maybe a zero length packet to wrap it up */ | |
410 | if (size == 0) | |
411 | size++; | |
412 | else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 | |
413 | && (urb->transfer_buffer_length | |
414 | % usb_maxpacket(urb->dev, pipe, | |
415 | usb_pipeout(pipe))) != 0) | |
416 | size++; | |
417 | break; | |
418 | case PIPE_ISOCHRONOUS: | |
419 | size = urb->number_of_packets; | |
420 | if (size <= 0) | |
421 | return -EINVAL; | |
422 | for (i = 0; i < urb->number_of_packets; i++) { | |
423 | urb->iso_frame_desc[i].actual_length = 0; | |
424 | urb->iso_frame_desc[i].status = (u32) (-EXDEV); | |
425 | } | |
426 | break; | |
427 | case PIPE_INTERRUPT: | |
428 | size = 1; | |
429 | } | |
430 | ||
431 | /* allocate the private part of the URB */ | |
432 | urb_priv = kzalloc(sizeof(*urb_priv), mem_flags); | |
433 | if (!urb_priv) | |
434 | return -ENOMEM; | |
435 | ||
436 | /* allocate the private part of the URB */ | |
4585ef11 | 437 | urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags); |
236dd4d1 AV |
438 | if (!urb_priv->tds) { |
439 | kfree(urb_priv); | |
440 | return -ENOMEM; | |
441 | } | |
442 | ||
443 | spin_lock_irqsave(&fhci->lock, flags); | |
444 | ||
445 | ret = usb_hcd_link_urb_to_ep(hcd, urb); | |
446 | if (ret) | |
447 | goto err; | |
448 | ||
449 | /* fill the private part of the URB */ | |
450 | urb_priv->num_of_tds = size; | |
451 | ||
452 | urb->status = -EINPROGRESS; | |
453 | urb->actual_length = 0; | |
454 | urb->error_count = 0; | |
455 | urb->hcpriv = urb_priv; | |
456 | ||
457 | fhci_queue_urb(fhci, urb); | |
458 | err: | |
459 | if (ret) { | |
460 | kfree(urb_priv->tds); | |
461 | kfree(urb_priv); | |
462 | } | |
463 | spin_unlock_irqrestore(&fhci->lock, flags); | |
464 | return ret; | |
465 | } | |
466 | ||
467 | /* dequeue FHCI URB */ | |
468 | static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
469 | { | |
470 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
471 | struct fhci_usb *usb = fhci->usb_lld; | |
472 | int ret = -EINVAL; | |
473 | unsigned long flags; | |
474 | ||
475 | if (!urb || !urb->dev || !urb->dev->bus) | |
476 | goto out; | |
477 | ||
478 | spin_lock_irqsave(&fhci->lock, flags); | |
479 | ||
480 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
481 | if (ret) | |
482 | goto out2; | |
483 | ||
484 | if (usb->port_status != FHCI_PORT_DISABLED) { | |
485 | struct urb_priv *urb_priv; | |
486 | ||
487 | /* | |
488 | * flag the urb's data for deletion in some upcoming | |
489 | * SF interrupt's delete list processing | |
490 | */ | |
491 | urb_priv = urb->hcpriv; | |
492 | ||
493 | if (!urb_priv || (urb_priv->state == URB_DEL)) | |
494 | goto out2; | |
495 | ||
496 | urb_priv->state = URB_DEL; | |
497 | ||
498 | /* already pending? */ | |
499 | urb_priv->ed->state = FHCI_ED_URB_DEL; | |
500 | } else { | |
501 | fhci_urb_complete_free(fhci, urb); | |
502 | } | |
503 | ||
504 | out2: | |
505 | spin_unlock_irqrestore(&fhci->lock, flags); | |
506 | out: | |
507 | return ret; | |
508 | } | |
509 | ||
510 | static void fhci_endpoint_disable(struct usb_hcd *hcd, | |
511 | struct usb_host_endpoint *ep) | |
512 | { | |
513 | struct fhci_hcd *fhci; | |
514 | struct ed *ed; | |
515 | unsigned long flags; | |
516 | ||
517 | fhci = hcd_to_fhci(hcd); | |
518 | spin_lock_irqsave(&fhci->lock, flags); | |
519 | ed = ep->hcpriv; | |
520 | if (ed) { | |
521 | while (ed->td_head != NULL) { | |
522 | struct td *td = fhci_remove_td_from_ed(ed); | |
523 | fhci_urb_complete_free(fhci, td->urb); | |
524 | } | |
525 | fhci_recycle_empty_ed(fhci, ed); | |
526 | ep->hcpriv = NULL; | |
527 | } | |
528 | spin_unlock_irqrestore(&fhci->lock, flags); | |
529 | } | |
530 | ||
531 | static int fhci_get_frame_number(struct usb_hcd *hcd) | |
532 | { | |
533 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
534 | ||
535 | return get_frame_num(fhci); | |
536 | } | |
537 | ||
538 | static const struct hc_driver fhci_driver = { | |
539 | .description = "fsl,usb-fhci", | |
540 | .product_desc = "FHCI HOST Controller", | |
541 | .hcd_priv_size = sizeof(struct fhci_hcd), | |
542 | ||
543 | /* generic hardware linkage */ | |
544 | .irq = fhci_irq, | |
545 | .flags = HCD_USB11 | HCD_MEMORY, | |
546 | ||
547 | /* basic lifecycle operation */ | |
548 | .start = fhci_start, | |
549 | .stop = fhci_stop, | |
550 | ||
551 | /* managing i/o requests and associated device resources */ | |
552 | .urb_enqueue = fhci_urb_enqueue, | |
553 | .urb_dequeue = fhci_urb_dequeue, | |
554 | .endpoint_disable = fhci_endpoint_disable, | |
555 | ||
556 | /* scheduling support */ | |
557 | .get_frame_number = fhci_get_frame_number, | |
558 | ||
559 | /* root hub support */ | |
560 | .hub_status_data = fhci_hub_status_data, | |
561 | .hub_control = fhci_hub_control, | |
562 | }; | |
563 | ||
564 | static int __devinit of_fhci_probe(struct of_device *ofdev, | |
565 | const struct of_device_id *ofid) | |
566 | { | |
567 | struct device *dev = &ofdev->dev; | |
568 | struct device_node *node = ofdev->node; | |
569 | struct usb_hcd *hcd; | |
570 | struct fhci_hcd *fhci; | |
571 | struct resource usb_regs; | |
572 | unsigned long pram_addr; | |
573 | unsigned int usb_irq; | |
574 | const char *sprop; | |
575 | const u32 *iprop; | |
576 | int size; | |
577 | int ret; | |
578 | int i; | |
579 | int j; | |
580 | ||
581 | if (usb_disabled()) | |
582 | return -ENODEV; | |
583 | ||
584 | sprop = of_get_property(node, "mode", NULL); | |
585 | if (sprop && strcmp(sprop, "host")) | |
586 | return -ENODEV; | |
587 | ||
6866ac9d | 588 | hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev)); |
236dd4d1 AV |
589 | if (!hcd) { |
590 | dev_err(dev, "could not create hcd\n"); | |
591 | return -ENOMEM; | |
592 | } | |
593 | ||
594 | fhci = hcd_to_fhci(hcd); | |
595 | hcd->self.controller = dev; | |
596 | dev_set_drvdata(dev, hcd); | |
597 | ||
598 | iprop = of_get_property(node, "hub-power-budget", &size); | |
599 | if (iprop && size == sizeof(*iprop)) | |
600 | hcd->power_budget = *iprop; | |
601 | ||
602 | /* FHCI registers. */ | |
603 | ret = of_address_to_resource(node, 0, &usb_regs); | |
604 | if (ret) { | |
605 | dev_err(dev, "could not get regs\n"); | |
606 | goto err_regs; | |
607 | } | |
608 | ||
609 | hcd->regs = ioremap(usb_regs.start, usb_regs.end - usb_regs.start + 1); | |
610 | if (!hcd->regs) { | |
611 | dev_err(dev, "could not ioremap regs\n"); | |
612 | ret = -ENOMEM; | |
613 | goto err_regs; | |
614 | } | |
615 | fhci->regs = hcd->regs; | |
616 | ||
617 | /* Parameter RAM. */ | |
618 | iprop = of_get_property(node, "reg", &size); | |
619 | if (!iprop || size < sizeof(*iprop) * 4) { | |
620 | dev_err(dev, "can't get pram offset\n"); | |
621 | ret = -EINVAL; | |
622 | goto err_pram; | |
623 | } | |
624 | ||
625 | pram_addr = cpm_muram_alloc_fixed(iprop[2], FHCI_PRAM_SIZE); | |
626 | if (IS_ERR_VALUE(pram_addr)) { | |
627 | dev_err(dev, "failed to allocate usb pram\n"); | |
628 | ret = -ENOMEM; | |
629 | goto err_pram; | |
630 | } | |
631 | fhci->pram = cpm_muram_addr(pram_addr); | |
632 | ||
633 | /* GPIOs and pins */ | |
634 | for (i = 0; i < NUM_GPIOS; i++) { | |
635 | int gpio; | |
636 | enum of_gpio_flags flags; | |
637 | ||
638 | gpio = of_get_gpio_flags(node, i, &flags); | |
639 | fhci->gpios[i] = gpio; | |
640 | fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW; | |
641 | ||
642 | if (!gpio_is_valid(gpio)) { | |
643 | if (i < GPIO_SPEED) { | |
644 | dev_err(dev, "incorrect GPIO%d: %d\n", | |
645 | i, gpio); | |
646 | goto err_gpios; | |
647 | } else { | |
648 | dev_info(dev, "assuming board doesn't have " | |
649 | "%s gpio\n", i == GPIO_SPEED ? | |
650 | "speed" : "power"); | |
651 | continue; | |
652 | } | |
653 | } | |
654 | ||
6866ac9d | 655 | ret = gpio_request(gpio, dev_name(dev)); |
236dd4d1 AV |
656 | if (ret) { |
657 | dev_err(dev, "failed to request gpio %d", i); | |
658 | goto err_gpios; | |
659 | } | |
660 | ||
661 | if (i >= GPIO_SPEED) { | |
662 | ret = gpio_direction_output(gpio, 0); | |
663 | if (ret) { | |
664 | dev_err(dev, "failed to set gpio %d as " | |
665 | "an output\n", i); | |
666 | i++; | |
667 | goto err_gpios; | |
668 | } | |
669 | } | |
670 | } | |
671 | ||
672 | for (j = 0; j < NUM_PINS; j++) { | |
673 | fhci->pins[j] = qe_pin_request(ofdev->node, j); | |
674 | if (IS_ERR(fhci->pins[j])) { | |
675 | ret = PTR_ERR(fhci->pins[j]); | |
676 | dev_err(dev, "can't get pin %d: %d\n", j, ret); | |
677 | goto err_pins; | |
678 | } | |
679 | } | |
680 | ||
681 | /* Frame limit timer and its interrupt. */ | |
682 | fhci->timer = gtm_get_timer16(); | |
683 | if (IS_ERR(fhci->timer)) { | |
684 | ret = PTR_ERR(fhci->timer); | |
685 | dev_err(dev, "failed to request qe timer: %i", ret); | |
686 | goto err_get_timer; | |
687 | } | |
688 | ||
689 | ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq, | |
690 | IRQF_DISABLED, "qe timer (usb)", hcd); | |
691 | if (ret) { | |
692 | dev_err(dev, "failed to request timer irq"); | |
693 | goto err_timer_irq; | |
694 | } | |
695 | ||
696 | /* USB Host interrupt. */ | |
697 | usb_irq = irq_of_parse_and_map(node, 0); | |
698 | if (usb_irq == NO_IRQ) { | |
699 | dev_err(dev, "could not get usb irq\n"); | |
700 | ret = -EINVAL; | |
701 | goto err_usb_irq; | |
702 | } | |
703 | ||
704 | /* Clocks. */ | |
705 | sprop = of_get_property(node, "fsl,fullspeed-clock", NULL); | |
706 | if (sprop) { | |
707 | fhci->fullspeed_clk = qe_clock_source(sprop); | |
708 | if (fhci->fullspeed_clk == QE_CLK_DUMMY) { | |
709 | dev_err(dev, "wrong fullspeed-clock\n"); | |
710 | ret = -EINVAL; | |
711 | goto err_clocks; | |
712 | } | |
713 | } | |
714 | ||
715 | sprop = of_get_property(node, "fsl,lowspeed-clock", NULL); | |
716 | if (sprop) { | |
717 | fhci->lowspeed_clk = qe_clock_source(sprop); | |
718 | if (fhci->lowspeed_clk == QE_CLK_DUMMY) { | |
719 | dev_err(dev, "wrong lowspeed-clock\n"); | |
720 | ret = -EINVAL; | |
721 | goto err_clocks; | |
722 | } | |
723 | } | |
724 | ||
725 | if (fhci->fullspeed_clk == QE_CLK_NONE && | |
726 | fhci->lowspeed_clk == QE_CLK_NONE) { | |
727 | dev_err(dev, "no clocks specified\n"); | |
728 | ret = -EINVAL; | |
729 | goto err_clocks; | |
730 | } | |
731 | ||
732 | dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq); | |
733 | ||
734 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); | |
735 | ||
736 | /* Start with full-speed, if possible. */ | |
737 | if (fhci->fullspeed_clk != QE_CLK_NONE) { | |
738 | fhci_config_transceiver(fhci, FHCI_PORT_FULL); | |
739 | qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK); | |
740 | } else { | |
741 | fhci_config_transceiver(fhci, FHCI_PORT_LOW); | |
742 | qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); | |
743 | } | |
744 | ||
745 | /* Clear and disable any pending interrupts. */ | |
746 | out_be16(&fhci->regs->usb_event, 0xffff); | |
747 | out_be16(&fhci->regs->usb_mask, 0); | |
748 | ||
749 | ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED); | |
750 | if (ret < 0) | |
751 | goto err_add_hcd; | |
752 | ||
753 | fhci_dfs_create(fhci); | |
754 | ||
755 | return 0; | |
756 | ||
757 | err_add_hcd: | |
758 | err_clocks: | |
759 | irq_dispose_mapping(usb_irq); | |
760 | err_usb_irq: | |
761 | free_irq(fhci->timer->irq, hcd); | |
762 | err_timer_irq: | |
763 | gtm_put_timer16(fhci->timer); | |
764 | err_get_timer: | |
765 | err_pins: | |
766 | while (--j >= 0) | |
767 | qe_pin_free(fhci->pins[j]); | |
768 | err_gpios: | |
769 | while (--i >= 0) { | |
770 | if (gpio_is_valid(fhci->gpios[i])) | |
771 | gpio_free(fhci->gpios[i]); | |
772 | } | |
773 | cpm_muram_free(pram_addr); | |
774 | err_pram: | |
775 | iounmap(hcd->regs); | |
776 | err_regs: | |
777 | usb_put_hcd(hcd); | |
778 | return ret; | |
779 | } | |
780 | ||
781 | static int __devexit fhci_remove(struct device *dev) | |
782 | { | |
783 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
784 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
785 | int i; | |
786 | int j; | |
787 | ||
788 | usb_remove_hcd(hcd); | |
789 | free_irq(fhci->timer->irq, hcd); | |
790 | gtm_put_timer16(fhci->timer); | |
791 | cpm_muram_free(cpm_muram_offset(fhci->pram)); | |
792 | for (i = 0; i < NUM_GPIOS; i++) { | |
793 | if (!gpio_is_valid(fhci->gpios[i])) | |
794 | continue; | |
795 | gpio_free(fhci->gpios[i]); | |
796 | } | |
797 | for (j = 0; j < NUM_PINS; j++) | |
798 | qe_pin_free(fhci->pins[j]); | |
799 | fhci_dfs_destroy(fhci); | |
800 | usb_put_hcd(hcd); | |
801 | return 0; | |
802 | } | |
803 | ||
804 | static int __devexit of_fhci_remove(struct of_device *ofdev) | |
805 | { | |
806 | return fhci_remove(&ofdev->dev); | |
807 | } | |
808 | ||
c4386ad0 | 809 | static const struct of_device_id of_fhci_match[] = { |
236dd4d1 AV |
810 | { .compatible = "fsl,mpc8323-qe-usb", }, |
811 | {}, | |
812 | }; | |
813 | MODULE_DEVICE_TABLE(of, of_fhci_match); | |
814 | ||
815 | static struct of_platform_driver of_fhci_driver = { | |
816 | .name = "fsl,usb-fhci", | |
817 | .match_table = of_fhci_match, | |
818 | .probe = of_fhci_probe, | |
819 | .remove = __devexit_p(of_fhci_remove), | |
820 | }; | |
821 | ||
822 | static int __init fhci_module_init(void) | |
823 | { | |
824 | return of_register_platform_driver(&of_fhci_driver); | |
825 | } | |
826 | module_init(fhci_module_init); | |
827 | ||
828 | static void __exit fhci_module_exit(void) | |
829 | { | |
830 | of_unregister_platform_driver(&of_fhci_driver); | |
831 | } | |
832 | module_exit(fhci_module_exit); | |
833 | ||
834 | MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver"); | |
835 | MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, " | |
836 | "Jerry Huang <Chang-Ming.Huang@freescale.com>, " | |
837 | "Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
838 | MODULE_LICENSE("GPL"); |