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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> | |
27729aad | 28 | #include <linux/usb/hcd.h> |
5af50730 RH |
29 | #include <linux/of_address.h> |
30 | #include <linux/of_irq.h> | |
236dd4d1 AV |
31 | #include <linux/of_platform.h> |
32 | #include <linux/of_gpio.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
236dd4d1 AV |
34 | #include <asm/qe.h> |
35 | #include <asm/fsl_gtm.h> | |
236dd4d1 AV |
36 | #include "fhci.h" |
37 | ||
38 | void fhci_start_sof_timer(struct fhci_hcd *fhci) | |
39 | { | |
40 | fhci_dbg(fhci, "-> %s\n", __func__); | |
41 | ||
42 | /* clear frame_n */ | |
43 | out_be16(&fhci->pram->frame_num, 0); | |
44 | ||
cf61fdb9 GMF |
45 | out_be16(&fhci->regs->usb_ussft, 0); |
46 | setbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE); | |
236dd4d1 AV |
47 | |
48 | fhci_dbg(fhci, "<- %s\n", __func__); | |
49 | } | |
50 | ||
51 | void fhci_stop_sof_timer(struct fhci_hcd *fhci) | |
52 | { | |
53 | fhci_dbg(fhci, "-> %s\n", __func__); | |
54 | ||
cf61fdb9 | 55 | clrbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE); |
236dd4d1 AV |
56 | gtm_stop_timer16(fhci->timer); |
57 | ||
58 | fhci_dbg(fhci, "<- %s\n", __func__); | |
59 | } | |
60 | ||
61 | u16 fhci_get_sof_timer_count(struct fhci_usb *usb) | |
62 | { | |
cf61fdb9 | 63 | return be16_to_cpu(in_be16(&usb->fhci->regs->usb_ussft) / 12); |
236dd4d1 AV |
64 | } |
65 | ||
66 | /* initialize the endpoint zero */ | |
67 | static u32 endpoint_zero_init(struct fhci_usb *usb, | |
68 | enum fhci_mem_alloc data_mem, | |
69 | u32 ring_len) | |
70 | { | |
71 | u32 rc; | |
72 | ||
73 | rc = fhci_create_ep(usb, data_mem, ring_len); | |
74 | if (rc) | |
75 | return rc; | |
76 | ||
77 | /* inilialize endpoint registers */ | |
78 | fhci_init_ep_registers(usb, usb->ep0, data_mem); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | /* enable the USB interrupts */ | |
84 | void fhci_usb_enable_interrupt(struct fhci_usb *usb) | |
85 | { | |
86 | struct fhci_hcd *fhci = usb->fhci; | |
87 | ||
88 | if (usb->intr_nesting_cnt == 1) { | |
89 | /* initialize the USB interrupt */ | |
90 | enable_irq(fhci_to_hcd(fhci)->irq); | |
91 | ||
92 | /* initialize the event register and mask register */ | |
cf61fdb9 GMF |
93 | out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
94 | out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); | |
236dd4d1 AV |
95 | |
96 | /* enable the timer interrupts */ | |
97 | enable_irq(fhci->timer->irq); | |
98 | } else if (usb->intr_nesting_cnt > 1) | |
99 | fhci_info(fhci, "unbalanced USB interrupts nesting\n"); | |
100 | usb->intr_nesting_cnt--; | |
101 | } | |
102 | ||
48e34d0f | 103 | /* disable the usb interrupt */ |
236dd4d1 AV |
104 | void fhci_usb_disable_interrupt(struct fhci_usb *usb) |
105 | { | |
106 | struct fhci_hcd *fhci = usb->fhci; | |
107 | ||
108 | if (usb->intr_nesting_cnt == 0) { | |
48e34d0f | 109 | /* disable the timer interrupt */ |
236dd4d1 AV |
110 | disable_irq_nosync(fhci->timer->irq); |
111 | ||
112 | /* disable the usb interrupt */ | |
113 | disable_irq_nosync(fhci_to_hcd(fhci)->irq); | |
cf61fdb9 | 114 | out_be16(&usb->fhci->regs->usb_usbmr, 0); |
236dd4d1 AV |
115 | } |
116 | usb->intr_nesting_cnt++; | |
117 | } | |
118 | ||
119 | /* enable the USB controller */ | |
120 | static u32 fhci_usb_enable(struct fhci_hcd *fhci) | |
121 | { | |
122 | struct fhci_usb *usb = fhci->usb_lld; | |
123 | ||
cf61fdb9 GMF |
124 | out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
125 | out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); | |
126 | setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN); | |
236dd4d1 AV |
127 | |
128 | mdelay(100); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | /* disable the USB controller */ | |
134 | static u32 fhci_usb_disable(struct fhci_hcd *fhci) | |
135 | { | |
136 | struct fhci_usb *usb = fhci->usb_lld; | |
137 | ||
138 | fhci_usb_disable_interrupt(usb); | |
139 | fhci_port_disable(fhci); | |
140 | ||
141 | /* disable the usb controller */ | |
142 | if (usb->port_status == FHCI_PORT_FULL || | |
143 | usb->port_status == FHCI_PORT_LOW) | |
144 | fhci_device_disconnected_interrupt(fhci); | |
145 | ||
cf61fdb9 | 146 | clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN); |
236dd4d1 AV |
147 | |
148 | return 0; | |
149 | } | |
150 | ||
151 | /* check the bus state by polling the QE bit on the IO ports */ | |
152 | int fhci_ioports_check_bus_state(struct fhci_hcd *fhci) | |
153 | { | |
154 | u8 bits = 0; | |
155 | ||
156 | /* check USBOE,if transmitting,exit */ | |
157 | if (!gpio_get_value(fhci->gpios[GPIO_USBOE])) | |
158 | return -1; | |
159 | ||
160 | /* check USBRP */ | |
161 | if (gpio_get_value(fhci->gpios[GPIO_USBRP])) | |
162 | bits |= 0x2; | |
163 | ||
164 | /* check USBRN */ | |
165 | if (gpio_get_value(fhci->gpios[GPIO_USBRN])) | |
166 | bits |= 0x1; | |
167 | ||
168 | return bits; | |
169 | } | |
170 | ||
171 | static void fhci_mem_free(struct fhci_hcd *fhci) | |
172 | { | |
173 | struct ed *ed; | |
174 | struct ed *next_ed; | |
175 | struct td *td; | |
176 | struct td *next_td; | |
177 | ||
178 | list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) { | |
179 | list_del(&ed->node); | |
180 | kfree(ed); | |
181 | } | |
182 | ||
183 | list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) { | |
184 | list_del(&td->node); | |
185 | kfree(td); | |
186 | } | |
187 | ||
188 | kfree(fhci->vroot_hub); | |
189 | fhci->vroot_hub = NULL; | |
190 | ||
191 | kfree(fhci->hc_list); | |
192 | fhci->hc_list = NULL; | |
193 | } | |
194 | ||
195 | static int fhci_mem_init(struct fhci_hcd *fhci) | |
196 | { | |
197 | int i; | |
198 | ||
199 | fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL); | |
200 | if (!fhci->hc_list) | |
201 | goto err; | |
202 | ||
203 | INIT_LIST_HEAD(&fhci->hc_list->ctrl_list); | |
204 | INIT_LIST_HEAD(&fhci->hc_list->bulk_list); | |
205 | INIT_LIST_HEAD(&fhci->hc_list->iso_list); | |
206 | INIT_LIST_HEAD(&fhci->hc_list->intr_list); | |
207 | INIT_LIST_HEAD(&fhci->hc_list->done_list); | |
208 | ||
209 | fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL); | |
210 | if (!fhci->vroot_hub) | |
211 | goto err; | |
212 | ||
213 | INIT_LIST_HEAD(&fhci->empty_eds); | |
214 | INIT_LIST_HEAD(&fhci->empty_tds); | |
215 | ||
216 | /* initialize work queue to handle done list */ | |
217 | fhci_tasklet.data = (unsigned long)fhci; | |
218 | fhci->process_done_task = &fhci_tasklet; | |
219 | ||
220 | for (i = 0; i < MAX_TDS; i++) { | |
221 | struct td *td; | |
222 | ||
223 | td = kmalloc(sizeof(*td), GFP_KERNEL); | |
224 | if (!td) | |
225 | goto err; | |
226 | fhci_recycle_empty_td(fhci, td); | |
227 | } | |
228 | for (i = 0; i < MAX_EDS; i++) { | |
229 | struct ed *ed; | |
230 | ||
231 | ed = kmalloc(sizeof(*ed), GFP_KERNEL); | |
232 | if (!ed) | |
233 | goto err; | |
234 | fhci_recycle_empty_ed(fhci, ed); | |
235 | } | |
236 | ||
237 | fhci->active_urbs = 0; | |
238 | return 0; | |
239 | err: | |
240 | fhci_mem_free(fhci); | |
241 | return -ENOMEM; | |
242 | } | |
243 | ||
244 | /* destroy the fhci_usb structure */ | |
245 | static void fhci_usb_free(void *lld) | |
246 | { | |
247 | struct fhci_usb *usb = lld; | |
ae35fe9e | 248 | struct fhci_hcd *fhci; |
236dd4d1 AV |
249 | |
250 | if (usb) { | |
ae35fe9e | 251 | fhci = usb->fhci; |
236dd4d1 AV |
252 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); |
253 | fhci_ep0_free(usb); | |
254 | kfree(usb->actual_frame); | |
255 | kfree(usb); | |
256 | } | |
257 | } | |
258 | ||
259 | /* initialize the USB */ | |
260 | static int fhci_usb_init(struct fhci_hcd *fhci) | |
261 | { | |
262 | struct fhci_usb *usb = fhci->usb_lld; | |
263 | ||
264 | memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE); | |
265 | ||
266 | usb->port_status = FHCI_PORT_DISABLED; | |
267 | usb->max_frame_usage = FRAME_TIME_USAGE; | |
268 | usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION; | |
269 | ||
270 | usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL); | |
271 | if (!usb->actual_frame) { | |
272 | fhci_usb_free(usb); | |
273 | return -ENOMEM; | |
274 | } | |
275 | ||
276 | INIT_LIST_HEAD(&usb->actual_frame->tds_list); | |
277 | ||
278 | /* initializing registers on chip, clear frame number */ | |
279 | out_be16(&fhci->pram->frame_num, 0); | |
280 | ||
281 | /* clear rx state */ | |
282 | out_be32(&fhci->pram->rx_state, 0); | |
283 | ||
284 | /* set mask register */ | |
285 | usb->saved_msk = (USB_E_TXB_MASK | | |
286 | USB_E_TXE1_MASK | | |
287 | USB_E_IDLE_MASK | | |
288 | USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK); | |
289 | ||
cf61fdb9 | 290 | out_8(&usb->fhci->regs->usb_usmod, USB_MODE_HOST | USB_MODE_EN); |
236dd4d1 AV |
291 | |
292 | /* clearing the mask register */ | |
cf61fdb9 | 293 | out_be16(&usb->fhci->regs->usb_usbmr, 0); |
236dd4d1 AV |
294 | |
295 | /* initialing the event register */ | |
cf61fdb9 | 296 | out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
236dd4d1 AV |
297 | |
298 | if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) { | |
299 | fhci_usb_free(usb); | |
300 | return -EINVAL; | |
301 | } | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | /* initialize the fhci_usb struct and the corresponding data staruct */ | |
307 | static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci) | |
308 | { | |
309 | struct fhci_usb *usb; | |
310 | ||
311 | /* allocate memory for SCC data structure */ | |
312 | usb = kzalloc(sizeof(*usb), GFP_KERNEL); | |
313 | if (!usb) { | |
314 | fhci_err(fhci, "no memory for SCC data struct\n"); | |
315 | return NULL; | |
316 | } | |
317 | ||
318 | usb->fhci = fhci; | |
319 | usb->hc_list = fhci->hc_list; | |
320 | usb->vroot_hub = fhci->vroot_hub; | |
321 | ||
322 | usb->transfer_confirm = fhci_transfer_confirm_callback; | |
323 | ||
324 | return usb; | |
325 | } | |
326 | ||
327 | static int fhci_start(struct usb_hcd *hcd) | |
328 | { | |
329 | int ret; | |
330 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
331 | ||
332 | ret = fhci_mem_init(fhci); | |
333 | if (ret) { | |
334 | fhci_err(fhci, "failed to allocate memory\n"); | |
335 | goto err; | |
336 | } | |
337 | ||
338 | fhci->usb_lld = fhci_create_lld(fhci); | |
339 | if (!fhci->usb_lld) { | |
340 | fhci_err(fhci, "low level driver config failed\n"); | |
341 | ret = -ENOMEM; | |
342 | goto err; | |
343 | } | |
344 | ||
345 | ret = fhci_usb_init(fhci); | |
346 | if (ret) { | |
347 | fhci_err(fhci, "low level driver initialize failed\n"); | |
348 | goto err; | |
349 | } | |
350 | ||
351 | spin_lock_init(&fhci->lock); | |
352 | ||
353 | /* connect the virtual root hub */ | |
354 | fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */ | |
355 | fhci->vroot_hub->hub.wHubStatus = 0; | |
356 | fhci->vroot_hub->hub.wHubChange = 0; | |
357 | fhci->vroot_hub->port.wPortStatus = 0; | |
358 | fhci->vroot_hub->port.wPortChange = 0; | |
359 | ||
360 | hcd->state = HC_STATE_RUNNING; | |
361 | ||
362 | /* | |
37ebb549 | 363 | * From here on, hub_wq concurrently accesses the root |
236dd4d1 | 364 | * hub; drivers will be talking to enumerated devices. |
37ebb549 | 365 | * (On restart paths, hub_wq already knows about the root |
236dd4d1 AV |
366 | * hub and could find work as soon as we wrote FLAG_CF.) |
367 | * | |
37ebb549 | 368 | * Before this point the HC was idle/ready. After, hub_wq |
236dd4d1 AV |
369 | * and device drivers may start it running. |
370 | */ | |
371 | fhci_usb_enable(fhci); | |
372 | return 0; | |
373 | err: | |
374 | fhci_mem_free(fhci); | |
375 | return ret; | |
376 | } | |
377 | ||
378 | static void fhci_stop(struct usb_hcd *hcd) | |
379 | { | |
380 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
381 | ||
382 | fhci_usb_disable_interrupt(fhci->usb_lld); | |
383 | fhci_usb_disable(fhci); | |
384 | ||
385 | fhci_usb_free(fhci->usb_lld); | |
386 | fhci->usb_lld = NULL; | |
387 | fhci_mem_free(fhci); | |
388 | } | |
389 | ||
390 | static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
391 | gfp_t mem_flags) | |
392 | { | |
393 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
394 | u32 pipe = urb->pipe; | |
395 | int ret; | |
396 | int i; | |
397 | int size = 0; | |
398 | struct urb_priv *urb_priv; | |
399 | unsigned long flags; | |
400 | ||
401 | switch (usb_pipetype(pipe)) { | |
402 | case PIPE_CONTROL: | |
403 | /* 1 td fro setup,1 for ack */ | |
404 | size = 2; | |
405 | case PIPE_BULK: | |
25985edc | 406 | /* one td for every 4096 bytes(can be up to 8k) */ |
236dd4d1 AV |
407 | size += urb->transfer_buffer_length / 4096; |
408 | /* ...add for any remaining bytes... */ | |
409 | if ((urb->transfer_buffer_length % 4096) != 0) | |
410 | size++; | |
411 | /* ..and maybe a zero length packet to wrap it up */ | |
412 | if (size == 0) | |
413 | size++; | |
414 | else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 | |
415 | && (urb->transfer_buffer_length | |
416 | % usb_maxpacket(urb->dev, pipe, | |
417 | usb_pipeout(pipe))) != 0) | |
418 | size++; | |
419 | break; | |
420 | case PIPE_ISOCHRONOUS: | |
421 | size = urb->number_of_packets; | |
422 | if (size <= 0) | |
423 | return -EINVAL; | |
424 | for (i = 0; i < urb->number_of_packets; i++) { | |
425 | urb->iso_frame_desc[i].actual_length = 0; | |
426 | urb->iso_frame_desc[i].status = (u32) (-EXDEV); | |
427 | } | |
428 | break; | |
429 | case PIPE_INTERRUPT: | |
430 | size = 1; | |
431 | } | |
432 | ||
433 | /* allocate the private part of the URB */ | |
434 | urb_priv = kzalloc(sizeof(*urb_priv), mem_flags); | |
435 | if (!urb_priv) | |
436 | return -ENOMEM; | |
437 | ||
438 | /* allocate the private part of the URB */ | |
4585ef11 | 439 | urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags); |
236dd4d1 AV |
440 | if (!urb_priv->tds) { |
441 | kfree(urb_priv); | |
442 | return -ENOMEM; | |
443 | } | |
444 | ||
445 | spin_lock_irqsave(&fhci->lock, flags); | |
446 | ||
447 | ret = usb_hcd_link_urb_to_ep(hcd, urb); | |
448 | if (ret) | |
449 | goto err; | |
450 | ||
451 | /* fill the private part of the URB */ | |
452 | urb_priv->num_of_tds = size; | |
453 | ||
454 | urb->status = -EINPROGRESS; | |
455 | urb->actual_length = 0; | |
456 | urb->error_count = 0; | |
457 | urb->hcpriv = urb_priv; | |
458 | ||
459 | fhci_queue_urb(fhci, urb); | |
460 | err: | |
461 | if (ret) { | |
462 | kfree(urb_priv->tds); | |
463 | kfree(urb_priv); | |
464 | } | |
465 | spin_unlock_irqrestore(&fhci->lock, flags); | |
466 | return ret; | |
467 | } | |
468 | ||
469 | /* dequeue FHCI URB */ | |
470 | static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
471 | { | |
472 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
473 | struct fhci_usb *usb = fhci->usb_lld; | |
474 | int ret = -EINVAL; | |
475 | unsigned long flags; | |
476 | ||
477 | if (!urb || !urb->dev || !urb->dev->bus) | |
478 | goto out; | |
479 | ||
480 | spin_lock_irqsave(&fhci->lock, flags); | |
481 | ||
482 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
483 | if (ret) | |
484 | goto out2; | |
485 | ||
486 | if (usb->port_status != FHCI_PORT_DISABLED) { | |
487 | struct urb_priv *urb_priv; | |
488 | ||
489 | /* | |
490 | * flag the urb's data for deletion in some upcoming | |
491 | * SF interrupt's delete list processing | |
492 | */ | |
493 | urb_priv = urb->hcpriv; | |
494 | ||
495 | if (!urb_priv || (urb_priv->state == URB_DEL)) | |
496 | goto out2; | |
497 | ||
498 | urb_priv->state = URB_DEL; | |
499 | ||
500 | /* already pending? */ | |
501 | urb_priv->ed->state = FHCI_ED_URB_DEL; | |
502 | } else { | |
503 | fhci_urb_complete_free(fhci, urb); | |
504 | } | |
505 | ||
506 | out2: | |
507 | spin_unlock_irqrestore(&fhci->lock, flags); | |
508 | out: | |
509 | return ret; | |
510 | } | |
511 | ||
512 | static void fhci_endpoint_disable(struct usb_hcd *hcd, | |
513 | struct usb_host_endpoint *ep) | |
514 | { | |
515 | struct fhci_hcd *fhci; | |
516 | struct ed *ed; | |
517 | unsigned long flags; | |
518 | ||
519 | fhci = hcd_to_fhci(hcd); | |
520 | spin_lock_irqsave(&fhci->lock, flags); | |
521 | ed = ep->hcpriv; | |
522 | if (ed) { | |
523 | while (ed->td_head != NULL) { | |
524 | struct td *td = fhci_remove_td_from_ed(ed); | |
525 | fhci_urb_complete_free(fhci, td->urb); | |
526 | } | |
527 | fhci_recycle_empty_ed(fhci, ed); | |
528 | ep->hcpriv = NULL; | |
529 | } | |
530 | spin_unlock_irqrestore(&fhci->lock, flags); | |
531 | } | |
532 | ||
533 | static int fhci_get_frame_number(struct usb_hcd *hcd) | |
534 | { | |
535 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
536 | ||
537 | return get_frame_num(fhci); | |
538 | } | |
539 | ||
540 | static const struct hc_driver fhci_driver = { | |
541 | .description = "fsl,usb-fhci", | |
542 | .product_desc = "FHCI HOST Controller", | |
543 | .hcd_priv_size = sizeof(struct fhci_hcd), | |
544 | ||
545 | /* generic hardware linkage */ | |
546 | .irq = fhci_irq, | |
547 | .flags = HCD_USB11 | HCD_MEMORY, | |
548 | ||
549 | /* basic lifecycle operation */ | |
550 | .start = fhci_start, | |
551 | .stop = fhci_stop, | |
552 | ||
553 | /* managing i/o requests and associated device resources */ | |
554 | .urb_enqueue = fhci_urb_enqueue, | |
555 | .urb_dequeue = fhci_urb_dequeue, | |
556 | .endpoint_disable = fhci_endpoint_disable, | |
557 | ||
558 | /* scheduling support */ | |
559 | .get_frame_number = fhci_get_frame_number, | |
560 | ||
561 | /* root hub support */ | |
562 | .hub_status_data = fhci_hub_status_data, | |
563 | .hub_control = fhci_hub_control, | |
564 | }; | |
565 | ||
41ac7b3a | 566 | static int of_fhci_probe(struct platform_device *ofdev) |
236dd4d1 AV |
567 | { |
568 | struct device *dev = &ofdev->dev; | |
61c7a080 | 569 | struct device_node *node = dev->of_node; |
236dd4d1 AV |
570 | struct usb_hcd *hcd; |
571 | struct fhci_hcd *fhci; | |
572 | struct resource usb_regs; | |
573 | unsigned long pram_addr; | |
574 | unsigned int usb_irq; | |
575 | const char *sprop; | |
576 | const u32 *iprop; | |
577 | int size; | |
578 | int ret; | |
579 | int i; | |
580 | int j; | |
581 | ||
582 | if (usb_disabled()) | |
583 | return -ENODEV; | |
584 | ||
585 | sprop = of_get_property(node, "mode", NULL); | |
586 | if (sprop && strcmp(sprop, "host")) | |
587 | return -ENODEV; | |
588 | ||
6866ac9d | 589 | hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev)); |
236dd4d1 AV |
590 | if (!hcd) { |
591 | dev_err(dev, "could not create hcd\n"); | |
592 | return -ENOMEM; | |
593 | } | |
594 | ||
595 | fhci = hcd_to_fhci(hcd); | |
596 | hcd->self.controller = dev; | |
597 | dev_set_drvdata(dev, hcd); | |
598 | ||
599 | iprop = of_get_property(node, "hub-power-budget", &size); | |
600 | if (iprop && size == sizeof(*iprop)) | |
601 | hcd->power_budget = *iprop; | |
602 | ||
603 | /* FHCI registers. */ | |
604 | ret = of_address_to_resource(node, 0, &usb_regs); | |
605 | if (ret) { | |
606 | dev_err(dev, "could not get regs\n"); | |
607 | goto err_regs; | |
608 | } | |
609 | ||
28f65c11 | 610 | hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs)); |
236dd4d1 AV |
611 | if (!hcd->regs) { |
612 | dev_err(dev, "could not ioremap regs\n"); | |
613 | ret = -ENOMEM; | |
614 | goto err_regs; | |
615 | } | |
616 | fhci->regs = hcd->regs; | |
617 | ||
618 | /* Parameter RAM. */ | |
619 | iprop = of_get_property(node, "reg", &size); | |
620 | if (!iprop || size < sizeof(*iprop) * 4) { | |
621 | dev_err(dev, "can't get pram offset\n"); | |
622 | ret = -EINVAL; | |
623 | goto err_pram; | |
624 | } | |
625 | ||
39eb4ed5 | 626 | pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64); |
236dd4d1 AV |
627 | if (IS_ERR_VALUE(pram_addr)) { |
628 | dev_err(dev, "failed to allocate usb pram\n"); | |
629 | ret = -ENOMEM; | |
630 | goto err_pram; | |
631 | } | |
39eb4ed5 JT |
632 | |
633 | qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB, | |
634 | QE_CR_PROTOCOL_UNSPECIFIED, pram_addr); | |
236dd4d1 AV |
635 | fhci->pram = cpm_muram_addr(pram_addr); |
636 | ||
637 | /* GPIOs and pins */ | |
638 | for (i = 0; i < NUM_GPIOS; i++) { | |
639 | int gpio; | |
640 | enum of_gpio_flags flags; | |
641 | ||
642 | gpio = of_get_gpio_flags(node, i, &flags); | |
643 | fhci->gpios[i] = gpio; | |
644 | fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW; | |
645 | ||
646 | if (!gpio_is_valid(gpio)) { | |
647 | if (i < GPIO_SPEED) { | |
648 | dev_err(dev, "incorrect GPIO%d: %d\n", | |
649 | i, gpio); | |
650 | goto err_gpios; | |
651 | } else { | |
652 | dev_info(dev, "assuming board doesn't have " | |
653 | "%s gpio\n", i == GPIO_SPEED ? | |
654 | "speed" : "power"); | |
655 | continue; | |
656 | } | |
657 | } | |
658 | ||
6866ac9d | 659 | ret = gpio_request(gpio, dev_name(dev)); |
236dd4d1 AV |
660 | if (ret) { |
661 | dev_err(dev, "failed to request gpio %d", i); | |
662 | goto err_gpios; | |
663 | } | |
664 | ||
665 | if (i >= GPIO_SPEED) { | |
666 | ret = gpio_direction_output(gpio, 0); | |
667 | if (ret) { | |
668 | dev_err(dev, "failed to set gpio %d as " | |
669 | "an output\n", i); | |
670 | i++; | |
671 | goto err_gpios; | |
672 | } | |
673 | } | |
674 | } | |
675 | ||
676 | for (j = 0; j < NUM_PINS; j++) { | |
61c7a080 | 677 | fhci->pins[j] = qe_pin_request(node, j); |
236dd4d1 AV |
678 | if (IS_ERR(fhci->pins[j])) { |
679 | ret = PTR_ERR(fhci->pins[j]); | |
680 | dev_err(dev, "can't get pin %d: %d\n", j, ret); | |
681 | goto err_pins; | |
682 | } | |
683 | } | |
684 | ||
685 | /* Frame limit timer and its interrupt. */ | |
686 | fhci->timer = gtm_get_timer16(); | |
687 | if (IS_ERR(fhci->timer)) { | |
688 | ret = PTR_ERR(fhci->timer); | |
689 | dev_err(dev, "failed to request qe timer: %i", ret); | |
690 | goto err_get_timer; | |
691 | } | |
692 | ||
693 | ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq, | |
b5dd18d8 | 694 | 0, "qe timer (usb)", hcd); |
236dd4d1 AV |
695 | if (ret) { |
696 | dev_err(dev, "failed to request timer irq"); | |
697 | goto err_timer_irq; | |
698 | } | |
699 | ||
700 | /* USB Host interrupt. */ | |
701 | usb_irq = irq_of_parse_and_map(node, 0); | |
702 | if (usb_irq == NO_IRQ) { | |
703 | dev_err(dev, "could not get usb irq\n"); | |
704 | ret = -EINVAL; | |
705 | goto err_usb_irq; | |
706 | } | |
707 | ||
708 | /* Clocks. */ | |
709 | sprop = of_get_property(node, "fsl,fullspeed-clock", NULL); | |
710 | if (sprop) { | |
711 | fhci->fullspeed_clk = qe_clock_source(sprop); | |
712 | if (fhci->fullspeed_clk == QE_CLK_DUMMY) { | |
713 | dev_err(dev, "wrong fullspeed-clock\n"); | |
714 | ret = -EINVAL; | |
715 | goto err_clocks; | |
716 | } | |
717 | } | |
718 | ||
719 | sprop = of_get_property(node, "fsl,lowspeed-clock", NULL); | |
720 | if (sprop) { | |
721 | fhci->lowspeed_clk = qe_clock_source(sprop); | |
722 | if (fhci->lowspeed_clk == QE_CLK_DUMMY) { | |
723 | dev_err(dev, "wrong lowspeed-clock\n"); | |
724 | ret = -EINVAL; | |
725 | goto err_clocks; | |
726 | } | |
727 | } | |
728 | ||
729 | if (fhci->fullspeed_clk == QE_CLK_NONE && | |
730 | fhci->lowspeed_clk == QE_CLK_NONE) { | |
731 | dev_err(dev, "no clocks specified\n"); | |
732 | ret = -EINVAL; | |
733 | goto err_clocks; | |
734 | } | |
735 | ||
736 | dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq); | |
737 | ||
738 | fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); | |
739 | ||
740 | /* Start with full-speed, if possible. */ | |
741 | if (fhci->fullspeed_clk != QE_CLK_NONE) { | |
742 | fhci_config_transceiver(fhci, FHCI_PORT_FULL); | |
743 | qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK); | |
744 | } else { | |
745 | fhci_config_transceiver(fhci, FHCI_PORT_LOW); | |
746 | qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3); | |
747 | } | |
748 | ||
749 | /* Clear and disable any pending interrupts. */ | |
cf61fdb9 GMF |
750 | out_be16(&fhci->regs->usb_usber, 0xffff); |
751 | out_be16(&fhci->regs->usb_usbmr, 0); | |
236dd4d1 | 752 | |
b5dd18d8 | 753 | ret = usb_add_hcd(hcd, usb_irq, 0); |
236dd4d1 AV |
754 | if (ret < 0) |
755 | goto err_add_hcd; | |
756 | ||
3c9740a1 PC |
757 | device_wakeup_enable(hcd->self.controller); |
758 | ||
236dd4d1 AV |
759 | fhci_dfs_create(fhci); |
760 | ||
761 | return 0; | |
762 | ||
763 | err_add_hcd: | |
764 | err_clocks: | |
765 | irq_dispose_mapping(usb_irq); | |
766 | err_usb_irq: | |
767 | free_irq(fhci->timer->irq, hcd); | |
768 | err_timer_irq: | |
769 | gtm_put_timer16(fhci->timer); | |
770 | err_get_timer: | |
771 | err_pins: | |
772 | while (--j >= 0) | |
773 | qe_pin_free(fhci->pins[j]); | |
774 | err_gpios: | |
775 | while (--i >= 0) { | |
776 | if (gpio_is_valid(fhci->gpios[i])) | |
777 | gpio_free(fhci->gpios[i]); | |
778 | } | |
779 | cpm_muram_free(pram_addr); | |
780 | err_pram: | |
781 | iounmap(hcd->regs); | |
782 | err_regs: | |
783 | usb_put_hcd(hcd); | |
784 | return ret; | |
785 | } | |
786 | ||
fb4e98ab | 787 | static int fhci_remove(struct device *dev) |
236dd4d1 AV |
788 | { |
789 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
790 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); | |
791 | int i; | |
792 | int j; | |
793 | ||
794 | usb_remove_hcd(hcd); | |
795 | free_irq(fhci->timer->irq, hcd); | |
796 | gtm_put_timer16(fhci->timer); | |
797 | cpm_muram_free(cpm_muram_offset(fhci->pram)); | |
798 | for (i = 0; i < NUM_GPIOS; i++) { | |
799 | if (!gpio_is_valid(fhci->gpios[i])) | |
800 | continue; | |
801 | gpio_free(fhci->gpios[i]); | |
802 | } | |
803 | for (j = 0; j < NUM_PINS; j++) | |
804 | qe_pin_free(fhci->pins[j]); | |
805 | fhci_dfs_destroy(fhci); | |
806 | usb_put_hcd(hcd); | |
807 | return 0; | |
808 | } | |
809 | ||
fb4e98ab | 810 | static int of_fhci_remove(struct platform_device *ofdev) |
236dd4d1 AV |
811 | { |
812 | return fhci_remove(&ofdev->dev); | |
813 | } | |
814 | ||
c4386ad0 | 815 | static const struct of_device_id of_fhci_match[] = { |
236dd4d1 AV |
816 | { .compatible = "fsl,mpc8323-qe-usb", }, |
817 | {}, | |
818 | }; | |
819 | MODULE_DEVICE_TABLE(of, of_fhci_match); | |
820 | ||
d35fb641 | 821 | static struct platform_driver of_fhci_driver = { |
4018294b GL |
822 | .driver = { |
823 | .name = "fsl,usb-fhci", | |
4018294b GL |
824 | .of_match_table = of_fhci_match, |
825 | }, | |
236dd4d1 | 826 | .probe = of_fhci_probe, |
7690417d | 827 | .remove = of_fhci_remove, |
236dd4d1 AV |
828 | }; |
829 | ||
cc27c96c | 830 | module_platform_driver(of_fhci_driver); |
236dd4d1 AV |
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"); |