1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Freescale QUICC Engine USB Host Controller Driver |
4 | * |
5 | * Copyright (c) Freescale Semicondutor, Inc. 2006. |
6 | * Shlomi Gridish <gridish@freescale.com> |
7 | * Jerry Huang <Chang-Ming.Huang@freescale.com> |
8 | * Copyright (c) Logic Product Development, Inc. 2007 |
9 | * Peter Barada <peterb@logicpd.com> |
10 | * Copyright (c) MontaVista Software, Inc. 2008. |
11 | * Anton Vorontsov <avorontsov@ru.mvista.com> |
12 | */ |
13 | |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> |
16 | #include <linux/spinlock.h> |
17 | #include <linux/kernel.h> |
18 | #include <linux/delay.h> |
19 | #include <linux/errno.h> |
20 | #include <linux/list.h> |
21 | #include <linux/interrupt.h> |
22 | #include <linux/io.h> |
23 | #include <linux/usb.h> |
24 | #include <linux/usb/hcd.h> |
25 | #include <linux/of.h> |
26 | #include <linux/of_address.h> |
27 | #include <linux/of_irq.h> |
28 | #include <linux/platform_device.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/gpio/consumer.h> |
31 | #include <soc/fsl/qe/qe.h> |
32 | #include <asm/fsl_gtm.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_ussft, 0); |
43 | setbits8(&fhci->regs->usb_usmod, 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_usmod, 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_ussft) / 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, ep: 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(irq: fhci_to_hcd(fhci)->irq); |
88 | |
89 | /* initialize the event register and mask register */ |
90 | out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
91 | out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); |
92 | |
93 | /* enable the timer interrupts */ |
94 | enable_irq(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 | /* disable 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 | /* disable the timer interrupt */ |
107 | disable_irq_nosync(irq: fhci->timer->irq); |
108 | |
109 | /* disable the usb interrupt */ |
110 | disable_irq_nosync(irq: fhci_to_hcd(fhci)->irq); |
111 | out_be16(&usb->fhci->regs->usb_usbmr, 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_usber, 0xffff); |
122 | out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); |
123 | setbits8(&usb->fhci->regs->usb_usmod, 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_usmod, 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 (!gpiod_get_value(desc: fhci->gpiods[GPIO_USBOE])) |
155 | return -1; |
156 | |
157 | /* check USBRP */ |
158 | if (gpiod_get_value(desc: fhci->gpiods[GPIO_USBRP])) |
159 | bits |= 0x2; |
160 | |
161 | /* check USBRN */ |
162 | if (gpiod_get_value(desc: fhci->gpiods[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(entry: &ed->node); |
177 | kfree(objp: ed); |
178 | } |
179 | |
180 | list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) { |
181 | list_del(entry: &td->node); |
182 | kfree(objp: td); |
183 | } |
184 | |
185 | kfree(objp: fhci->vroot_hub); |
186 | fhci->vroot_hub = NULL; |
187 | |
188 | kfree(objp: 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(size: sizeof(*fhci->hc_list), GFP_KERNEL); |
197 | if (!fhci->hc_list) |
198 | goto err; |
199 | |
200 | INIT_LIST_HEAD(list: &fhci->hc_list->ctrl_list); |
201 | INIT_LIST_HEAD(list: &fhci->hc_list->bulk_list); |
202 | INIT_LIST_HEAD(list: &fhci->hc_list->iso_list); |
203 | INIT_LIST_HEAD(list: &fhci->hc_list->intr_list); |
204 | INIT_LIST_HEAD(list: &fhci->hc_list->done_list); |
205 | |
206 | fhci->vroot_hub = kzalloc(size: sizeof(*fhci->vroot_hub), GFP_KERNEL); |
207 | if (!fhci->vroot_hub) |
208 | goto err; |
209 | |
210 | INIT_LIST_HEAD(list: &fhci->empty_eds); |
211 | INIT_LIST_HEAD(list: &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(size: 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(size: 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; |
246 | |
247 | if (usb) { |
248 | fhci = usb->fhci; |
249 | fhci_config_transceiver(fhci, status: FHCI_PORT_POWER_OFF); |
250 | fhci_ep0_free(usb); |
251 | kfree(objp: usb->actual_frame); |
252 | kfree(objp: usb); |
253 | } |
254 | } |
255 | |
256 | /* initialize the USB */ |
257 | static int fhci_usb_init(struct fhci_hcd *fhci) |
258 | { |
259 | struct fhci_usb *usb = fhci->usb_lld; |
260 | |
261 | memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE); |
262 | |
263 | usb->port_status = FHCI_PORT_DISABLED; |
264 | usb->max_frame_usage = FRAME_TIME_USAGE; |
265 | usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION; |
266 | |
267 | usb->actual_frame = kzalloc(size: sizeof(*usb->actual_frame), GFP_KERNEL); |
268 | if (!usb->actual_frame) { |
269 | fhci_usb_free(lld: usb); |
270 | return -ENOMEM; |
271 | } |
272 | |
273 | INIT_LIST_HEAD(list: &usb->actual_frame->tds_list); |
274 | |
275 | /* initializing registers on chip, clear frame number */ |
276 | out_be16(&fhci->pram->frame_num, 0); |
277 | |
278 | /* clear rx state */ |
279 | out_be32(&fhci->pram->rx_state, 0); |
280 | |
281 | /* set mask register */ |
282 | usb->saved_msk = (USB_E_TXB_MASK | |
283 | USB_E_TXE1_MASK | |
284 | USB_E_IDLE_MASK | |
285 | USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK); |
286 | |
287 | out_8(&usb->fhci->regs->usb_usmod, USB_MODE_HOST | USB_MODE_EN); |
288 | |
289 | /* clearing the mask register */ |
290 | out_be16(&usb->fhci->regs->usb_usbmr, 0); |
291 | |
292 | /* initialing the event register */ |
293 | out_be16(&usb->fhci->regs->usb_usber, 0xffff); |
294 | |
295 | if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) { |
296 | fhci_usb_free(lld: usb); |
297 | return -EINVAL; |
298 | } |
299 | |
300 | return 0; |
301 | } |
302 | |
303 | /* initialize the fhci_usb struct and the corresponding data staruct */ |
304 | static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci) |
305 | { |
306 | struct fhci_usb *usb; |
307 | |
308 | /* allocate memory for SCC data structure */ |
309 | usb = kzalloc(size: sizeof(*usb), GFP_KERNEL); |
310 | if (!usb) |
311 | return NULL; |
312 | |
313 | usb->fhci = fhci; |
314 | usb->hc_list = fhci->hc_list; |
315 | usb->vroot_hub = fhci->vroot_hub; |
316 | |
317 | usb->transfer_confirm = fhci_transfer_confirm_callback; |
318 | |
319 | return usb; |
320 | } |
321 | |
322 | static int fhci_start(struct usb_hcd *hcd) |
323 | { |
324 | int ret; |
325 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
326 | |
327 | ret = fhci_mem_init(fhci); |
328 | if (ret) { |
329 | fhci_err(fhci, "failed to allocate memory\n" ); |
330 | goto err; |
331 | } |
332 | |
333 | fhci->usb_lld = fhci_create_lld(fhci); |
334 | if (!fhci->usb_lld) { |
335 | fhci_err(fhci, "low level driver config failed\n" ); |
336 | ret = -ENOMEM; |
337 | goto err; |
338 | } |
339 | |
340 | ret = fhci_usb_init(fhci); |
341 | if (ret) { |
342 | fhci_err(fhci, "low level driver initialize failed\n" ); |
343 | goto err; |
344 | } |
345 | |
346 | spin_lock_init(&fhci->lock); |
347 | |
348 | /* connect the virtual root hub */ |
349 | fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */ |
350 | fhci->vroot_hub->hub.wHubStatus = 0; |
351 | fhci->vroot_hub->hub.wHubChange = 0; |
352 | fhci->vroot_hub->port.wPortStatus = 0; |
353 | fhci->vroot_hub->port.wPortChange = 0; |
354 | |
355 | hcd->state = HC_STATE_RUNNING; |
356 | |
357 | /* |
358 | * From here on, hub_wq concurrently accesses the root |
359 | * hub; drivers will be talking to enumerated devices. |
360 | * (On restart paths, hub_wq already knows about the root |
361 | * hub and could find work as soon as we wrote FLAG_CF.) |
362 | * |
363 | * Before this point the HC was idle/ready. After, hub_wq |
364 | * and device drivers may start it running. |
365 | */ |
366 | fhci_usb_enable(fhci); |
367 | return 0; |
368 | err: |
369 | fhci_mem_free(fhci); |
370 | return ret; |
371 | } |
372 | |
373 | static void fhci_stop(struct usb_hcd *hcd) |
374 | { |
375 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
376 | |
377 | fhci_usb_disable_interrupt(usb: fhci->usb_lld); |
378 | fhci_usb_disable(fhci); |
379 | |
380 | fhci_usb_free(lld: fhci->usb_lld); |
381 | fhci->usb_lld = NULL; |
382 | fhci_mem_free(fhci); |
383 | } |
384 | |
385 | static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
386 | gfp_t mem_flags) |
387 | { |
388 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
389 | u32 pipe = urb->pipe; |
390 | int ret; |
391 | int i; |
392 | int size = 0; |
393 | struct urb_priv *urb_priv; |
394 | unsigned long flags; |
395 | |
396 | switch (usb_pipetype(pipe)) { |
397 | case PIPE_CONTROL: |
398 | /* 1 td fro setup,1 for ack */ |
399 | size = 2; |
400 | fallthrough; |
401 | case PIPE_BULK: |
402 | /* one td for every 4096 bytes(can be up to 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(udev: urb->dev, pipe)) != 0) |
413 | size++; |
414 | break; |
415 | case PIPE_ISOCHRONOUS: |
416 | size = urb->number_of_packets; |
417 | if (size <= 0) |
418 | return -EINVAL; |
419 | for (i = 0; i < urb->number_of_packets; i++) { |
420 | urb->iso_frame_desc[i].actual_length = 0; |
421 | urb->iso_frame_desc[i].status = (u32) (-EXDEV); |
422 | } |
423 | break; |
424 | case PIPE_INTERRUPT: |
425 | size = 1; |
426 | } |
427 | |
428 | /* allocate the private part of the URB */ |
429 | urb_priv = kzalloc(size: sizeof(*urb_priv), flags: mem_flags); |
430 | if (!urb_priv) |
431 | return -ENOMEM; |
432 | |
433 | /* allocate the private part of the URB */ |
434 | urb_priv->tds = kcalloc(n: size, size: sizeof(*urb_priv->tds), flags: mem_flags); |
435 | if (!urb_priv->tds) { |
436 | kfree(objp: urb_priv); |
437 | return -ENOMEM; |
438 | } |
439 | |
440 | spin_lock_irqsave(&fhci->lock, flags); |
441 | |
442 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
443 | if (ret) |
444 | goto err; |
445 | |
446 | /* fill the private part of the URB */ |
447 | urb_priv->num_of_tds = size; |
448 | |
449 | urb->status = -EINPROGRESS; |
450 | urb->actual_length = 0; |
451 | urb->error_count = 0; |
452 | urb->hcpriv = urb_priv; |
453 | |
454 | fhci_queue_urb(fhci, urb); |
455 | err: |
456 | if (ret) { |
457 | kfree(objp: urb_priv->tds); |
458 | kfree(objp: urb_priv); |
459 | } |
460 | spin_unlock_irqrestore(lock: &fhci->lock, flags); |
461 | return ret; |
462 | } |
463 | |
464 | /* dequeue FHCI URB */ |
465 | static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
466 | { |
467 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
468 | struct fhci_usb *usb = fhci->usb_lld; |
469 | int ret = -EINVAL; |
470 | unsigned long flags; |
471 | |
472 | if (!urb || !urb->dev || !urb->dev->bus) |
473 | goto out; |
474 | |
475 | spin_lock_irqsave(&fhci->lock, flags); |
476 | |
477 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
478 | if (ret) |
479 | goto out2; |
480 | |
481 | if (usb->port_status != FHCI_PORT_DISABLED) { |
482 | struct urb_priv *urb_priv; |
483 | |
484 | /* |
485 | * flag the urb's data for deletion in some upcoming |
486 | * SF interrupt's delete list processing |
487 | */ |
488 | urb_priv = urb->hcpriv; |
489 | |
490 | if (!urb_priv || (urb_priv->state == URB_DEL)) |
491 | goto out2; |
492 | |
493 | urb_priv->state = URB_DEL; |
494 | |
495 | /* already pending? */ |
496 | urb_priv->ed->state = FHCI_ED_URB_DEL; |
497 | } else { |
498 | fhci_urb_complete_free(fhci, urb); |
499 | } |
500 | |
501 | out2: |
502 | spin_unlock_irqrestore(lock: &fhci->lock, flags); |
503 | out: |
504 | return ret; |
505 | } |
506 | |
507 | static void fhci_endpoint_disable(struct usb_hcd *hcd, |
508 | struct usb_host_endpoint *ep) |
509 | { |
510 | struct fhci_hcd *fhci; |
511 | struct ed *ed; |
512 | unsigned long flags; |
513 | |
514 | fhci = hcd_to_fhci(hcd); |
515 | spin_lock_irqsave(&fhci->lock, flags); |
516 | ed = ep->hcpriv; |
517 | if (ed) { |
518 | while (ed->td_head != NULL) { |
519 | struct td *td = fhci_remove_td_from_ed(ed); |
520 | fhci_urb_complete_free(fhci, urb: td->urb); |
521 | } |
522 | fhci_recycle_empty_ed(fhci, ed); |
523 | ep->hcpriv = NULL; |
524 | } |
525 | spin_unlock_irqrestore(lock: &fhci->lock, flags); |
526 | } |
527 | |
528 | static int fhci_get_frame_number(struct usb_hcd *hcd) |
529 | { |
530 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
531 | |
532 | return get_frame_num(fhci); |
533 | } |
534 | |
535 | static const struct hc_driver fhci_driver = { |
536 | .description = "fsl,usb-fhci" , |
537 | .product_desc = "FHCI HOST Controller" , |
538 | .hcd_priv_size = sizeof(struct fhci_hcd), |
539 | |
540 | /* generic hardware linkage */ |
541 | .irq = fhci_irq, |
542 | .flags = HCD_DMA | HCD_USB11 | HCD_MEMORY, |
543 | |
544 | /* basic lifecycle operation */ |
545 | .start = fhci_start, |
546 | .stop = fhci_stop, |
547 | |
548 | /* managing i/o requests and associated device resources */ |
549 | .urb_enqueue = fhci_urb_enqueue, |
550 | .urb_dequeue = fhci_urb_dequeue, |
551 | .endpoint_disable = fhci_endpoint_disable, |
552 | |
553 | /* scheduling support */ |
554 | .get_frame_number = fhci_get_frame_number, |
555 | |
556 | /* root hub support */ |
557 | .hub_status_data = fhci_hub_status_data, |
558 | .hub_control = fhci_hub_control, |
559 | }; |
560 | |
561 | static int of_fhci_probe(struct platform_device *ofdev) |
562 | { |
563 | struct device *dev = &ofdev->dev; |
564 | struct device_node *node = dev->of_node; |
565 | struct usb_hcd *hcd; |
566 | struct fhci_hcd *fhci; |
567 | struct resource usb_regs; |
568 | unsigned long pram_addr; |
569 | unsigned int usb_irq; |
570 | const char *sprop; |
571 | const u32 *iprop; |
572 | int size; |
573 | int ret; |
574 | int i; |
575 | int j; |
576 | |
577 | if (usb_disabled()) |
578 | return -ENODEV; |
579 | |
580 | sprop = of_get_property(node, name: "mode" , NULL); |
581 | if (sprop && strcmp(sprop, "host" )) |
582 | return -ENODEV; |
583 | |
584 | hcd = usb_create_hcd(driver: &fhci_driver, dev, bus_name: dev_name(dev)); |
585 | if (!hcd) { |
586 | dev_err(dev, "could not create hcd\n" ); |
587 | return -ENOMEM; |
588 | } |
589 | |
590 | fhci = hcd_to_fhci(hcd); |
591 | hcd->self.controller = dev; |
592 | dev_set_drvdata(dev, data: hcd); |
593 | |
594 | iprop = of_get_property(node, name: "hub-power-budget" , lenp: &size); |
595 | if (iprop && size == sizeof(*iprop)) |
596 | hcd->power_budget = *iprop; |
597 | |
598 | /* FHCI registers. */ |
599 | ret = of_address_to_resource(dev: node, index: 0, r: &usb_regs); |
600 | if (ret) { |
601 | dev_err(dev, "could not get regs\n" ); |
602 | goto err_regs; |
603 | } |
604 | |
605 | hcd->regs = ioremap(offset: usb_regs.start, size: resource_size(res: &usb_regs)); |
606 | if (!hcd->regs) { |
607 | dev_err(dev, "could not ioremap regs\n" ); |
608 | ret = -ENOMEM; |
609 | goto err_regs; |
610 | } |
611 | fhci->regs = hcd->regs; |
612 | |
613 | /* Parameter RAM. */ |
614 | iprop = of_get_property(node, name: "reg" , lenp: &size); |
615 | if (!iprop || size < sizeof(*iprop) * 4) { |
616 | dev_err(dev, "can't get pram offset\n" ); |
617 | ret = -EINVAL; |
618 | goto err_pram; |
619 | } |
620 | |
621 | pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, align: 64); |
622 | if (IS_ERR_VALUE(pram_addr)) { |
623 | dev_err(dev, "failed to allocate usb pram\n" ); |
624 | ret = -ENOMEM; |
625 | goto err_pram; |
626 | } |
627 | |
628 | qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB, |
629 | QE_CR_PROTOCOL_UNSPECIFIED, cmd_input: pram_addr); |
630 | fhci->pram = cpm_muram_addr(offset: pram_addr); |
631 | |
632 | /* GPIOs and pins */ |
633 | for (i = 0; i < NUM_GPIOS; i++) { |
634 | if (i < GPIO_SPEED) |
635 | fhci->gpiods[i] = devm_gpiod_get_index(dev, |
636 | NULL, idx: i, flags: GPIOD_IN); |
637 | |
638 | else |
639 | fhci->gpiods[i] = devm_gpiod_get_index_optional(dev, |
640 | NULL, index: i, flags: GPIOD_OUT_LOW); |
641 | |
642 | if (IS_ERR(ptr: fhci->gpiods[i])) { |
643 | dev_err(dev, "incorrect GPIO%d: %ld\n" , |
644 | i, PTR_ERR(fhci->gpiods[i])); |
645 | goto err_gpios; |
646 | } |
647 | if (!fhci->gpiods[i]) { |
648 | dev_info(dev, "assuming board doesn't have " |
649 | "%s gpio\n" , i == GPIO_SPEED ? |
650 | "speed" : "power" ); |
651 | } |
652 | } |
653 | |
654 | for (j = 0; j < NUM_PINS; j++) { |
655 | fhci->pins[j] = qe_pin_request(dev, index: j); |
656 | if (IS_ERR(ptr: fhci->pins[j])) { |
657 | ret = PTR_ERR(ptr: fhci->pins[j]); |
658 | dev_err(dev, "can't get pin %d: %d\n" , j, ret); |
659 | goto err_pins; |
660 | } |
661 | } |
662 | |
663 | /* Frame limit timer and its interrupt. */ |
664 | fhci->timer = gtm_get_timer16(); |
665 | if (IS_ERR(ptr: fhci->timer)) { |
666 | ret = PTR_ERR(ptr: fhci->timer); |
667 | dev_err(dev, "failed to request qe timer: %i" , ret); |
668 | goto err_get_timer; |
669 | } |
670 | |
671 | ret = request_irq(irq: fhci->timer->irq, handler: fhci_frame_limit_timer_irq, |
672 | flags: 0, name: "qe timer (usb)" , dev: hcd); |
673 | if (ret) { |
674 | dev_err(dev, "failed to request timer irq" ); |
675 | goto err_timer_irq; |
676 | } |
677 | |
678 | /* USB Host interrupt. */ |
679 | usb_irq = irq_of_parse_and_map(node, index: 0); |
680 | if (!usb_irq) { |
681 | dev_err(dev, "could not get usb irq\n" ); |
682 | ret = -EINVAL; |
683 | goto err_usb_irq; |
684 | } |
685 | |
686 | /* Clocks. */ |
687 | sprop = of_get_property(node, name: "fsl,fullspeed-clock" , NULL); |
688 | if (sprop) { |
689 | fhci->fullspeed_clk = qe_clock_source(source: sprop); |
690 | if (fhci->fullspeed_clk == QE_CLK_DUMMY) { |
691 | dev_err(dev, "wrong fullspeed-clock\n" ); |
692 | ret = -EINVAL; |
693 | goto err_clocks; |
694 | } |
695 | } |
696 | |
697 | sprop = of_get_property(node, name: "fsl,lowspeed-clock" , NULL); |
698 | if (sprop) { |
699 | fhci->lowspeed_clk = qe_clock_source(source: sprop); |
700 | if (fhci->lowspeed_clk == QE_CLK_DUMMY) { |
701 | dev_err(dev, "wrong lowspeed-clock\n" ); |
702 | ret = -EINVAL; |
703 | goto err_clocks; |
704 | } |
705 | } |
706 | |
707 | if (fhci->fullspeed_clk == QE_CLK_NONE && |
708 | fhci->lowspeed_clk == QE_CLK_NONE) { |
709 | dev_err(dev, "no clocks specified\n" ); |
710 | ret = -EINVAL; |
711 | goto err_clocks; |
712 | } |
713 | |
714 | dev_info(dev, "at 0x%p, irq %d\n" , hcd->regs, usb_irq); |
715 | |
716 | fhci_config_transceiver(fhci, status: FHCI_PORT_POWER_OFF); |
717 | |
718 | /* Start with full-speed, if possible. */ |
719 | if (fhci->fullspeed_clk != QE_CLK_NONE) { |
720 | fhci_config_transceiver(fhci, status: FHCI_PORT_FULL); |
721 | qe_usb_clock_set(clk: fhci->fullspeed_clk, USB_CLOCK); |
722 | } else { |
723 | fhci_config_transceiver(fhci, status: FHCI_PORT_LOW); |
724 | qe_usb_clock_set(clk: fhci->lowspeed_clk, USB_CLOCK >> 3); |
725 | } |
726 | |
727 | /* Clear and disable any pending interrupts. */ |
728 | out_be16(&fhci->regs->usb_usber, 0xffff); |
729 | out_be16(&fhci->regs->usb_usbmr, 0); |
730 | |
731 | ret = usb_add_hcd(hcd, irqnum: usb_irq, irqflags: 0); |
732 | if (ret < 0) |
733 | goto err_add_hcd; |
734 | |
735 | device_wakeup_enable(dev: hcd->self.controller); |
736 | |
737 | fhci_dfs_create(fhci); |
738 | |
739 | return 0; |
740 | |
741 | err_add_hcd: |
742 | err_clocks: |
743 | irq_dispose_mapping(virq: usb_irq); |
744 | err_usb_irq: |
745 | free_irq(fhci->timer->irq, hcd); |
746 | err_timer_irq: |
747 | gtm_put_timer16(fhci->timer); |
748 | err_get_timer: |
749 | err_pins: |
750 | while (--j >= 0) |
751 | qe_pin_free(qe_pin: fhci->pins[j]); |
752 | err_gpios: |
753 | cpm_muram_free(offset: pram_addr); |
754 | err_pram: |
755 | iounmap(addr: hcd->regs); |
756 | err_regs: |
757 | usb_put_hcd(hcd); |
758 | return ret; |
759 | } |
760 | |
761 | static void fhci_remove(struct device *dev) |
762 | { |
763 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
764 | struct fhci_hcd *fhci = hcd_to_fhci(hcd); |
765 | int j; |
766 | |
767 | usb_remove_hcd(hcd); |
768 | free_irq(fhci->timer->irq, hcd); |
769 | gtm_put_timer16(fhci->timer); |
770 | cpm_muram_free(offset: cpm_muram_offset(addr: fhci->pram)); |
771 | for (j = 0; j < NUM_PINS; j++) |
772 | qe_pin_free(qe_pin: fhci->pins[j]); |
773 | fhci_dfs_destroy(fhci); |
774 | usb_put_hcd(hcd); |
775 | } |
776 | |
777 | static void of_fhci_remove(struct platform_device *ofdev) |
778 | { |
779 | fhci_remove(dev: &ofdev->dev); |
780 | } |
781 | |
782 | static const struct of_device_id of_fhci_match[] = { |
783 | { .compatible = "fsl,mpc8323-qe-usb" , }, |
784 | {}, |
785 | }; |
786 | MODULE_DEVICE_TABLE(of, of_fhci_match); |
787 | |
788 | static struct platform_driver of_fhci_driver = { |
789 | .driver = { |
790 | .name = "fsl,usb-fhci" , |
791 | .of_match_table = of_fhci_match, |
792 | }, |
793 | .probe = of_fhci_probe, |
794 | .remove_new = of_fhci_remove, |
795 | }; |
796 | |
797 | module_platform_driver(of_fhci_driver); |
798 | |
799 | MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver" ); |
800 | MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, " |
801 | "Jerry Huang <Chang-Ming.Huang@freescale.com>, " |
802 | "Anton Vorontsov <avorontsov@ru.mvista.com>" ); |
803 | MODULE_LICENSE("GPL" ); |
804 | |