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Merge tag 'usb-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
[linux-block.git] / drivers / usb / host / fhci-hcd.c
CommitLineData
5fd54ace 1// SPDX-License-Identifier: GPL-2.0+
236dd4d1
AV		 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>
236dd4d1
AV		 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>
27729aad 24#include <linux/usb/hcd.h>
5af50730
RH		 25#include <linux/of_address.h>
26#include <linux/of_irq.h>
236dd4d1
AV		 27#include <linux/of_platform.h>
28#include <linux/of_gpio.h>
5a0e3ad6 29#include <linux/slab.h>
7aa1aa6e 30#include <soc/fsl/qe/qe.h>
236dd4d1 31#include <asm/fsl_gtm.h>
236dd4d1
AV		 32#include "fhci.h"
33
34void fhci_start_sof_timer(struct fhci_hcd *fhci)
35{
36 fhci_dbg(fhci, "-> %s\n", __func__);
37
38 /* clear frame_n */
39 out_be16(&fhci->pram->frame_num, 0);
40
cf61fdb9
GMF		 41 out_be16(&fhci->regs->usb_ussft, 0);
42 setbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
236dd4d1
AV		 43
44 fhci_dbg(fhci, "<- %s\n", __func__);
45}
46
47void fhci_stop_sof_timer(struct fhci_hcd *fhci)
48{
49 fhci_dbg(fhci, "-> %s\n", __func__);
50
cf61fdb9 51 clrbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
236dd4d1
AV		 52 gtm_stop_timer16(fhci->timer);
53
54 fhci_dbg(fhci, "<- %s\n", __func__);
55}
56
57u16 fhci_get_sof_timer_count(struct fhci_usb *usb)
58{
cf61fdb9 59 return be16_to_cpu(in_be16(&usb->fhci->regs->usb_ussft) / 12);
236dd4d1
AV		 60}
61
62/* initialize the endpoint zero */
63static u32 endpoint_zero_init(struct fhci_usb *usb,
64 enum fhci_mem_alloc data_mem,
65 u32 ring_len)
66{
67 u32 rc;
68
69 rc = fhci_create_ep(usb, data_mem, ring_len);
70 if (rc)
71 return rc;
72
73 /* inilialize endpoint registers */
74 fhci_init_ep_registers(usb, usb->ep0, data_mem);
75
76 return 0;
77}
78
79/* enable the USB interrupts */
80void fhci_usb_enable_interrupt(struct fhci_usb *usb)
81{
82 struct fhci_hcd *fhci = usb->fhci;
83
84 if (usb->intr_nesting_cnt == 1) {
85 /* initialize the USB interrupt */
86 enable_irq(fhci_to_hcd(fhci)->irq);
87
88 /* initialize the event register and mask register */
cf61fdb9
GMF		 89 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
90 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
236dd4d1
AV		 91
92 /* enable the timer interrupts */
93 enable_irq(fhci->timer->irq);
94 } else if (usb->intr_nesting_cnt > 1)
95 fhci_info(fhci, "unbalanced USB interrupts nesting\n");
96 usb->intr_nesting_cnt--;
97}
98
48e34d0f 99/* disable the usb interrupt */
236dd4d1
AV		 100void fhci_usb_disable_interrupt(struct fhci_usb *usb)
101{
102 struct fhci_hcd *fhci = usb->fhci;
103
104 if (usb->intr_nesting_cnt == 0) {
48e34d0f 105 /* disable the timer interrupt */
236dd4d1
AV		 106 disable_irq_nosync(fhci->timer->irq);
107
108 /* disable the usb interrupt */
109 disable_irq_nosync(fhci_to_hcd(fhci)->irq);
cf61fdb9 110 out_be16(&usb->fhci->regs->usb_usbmr, 0);
236dd4d1
AV		 111 }
112 usb->intr_nesting_cnt++;
113}
114
115/* enable the USB controller */
116static u32 fhci_usb_enable(struct fhci_hcd *fhci)
117{
118 struct fhci_usb *usb = fhci->usb_lld;
119
cf61fdb9
GMF		 120 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
121 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
122 setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
236dd4d1
AV		 123
124 mdelay(100);
125
126 return 0;
127}
128
129/* disable the USB controller */
130static u32 fhci_usb_disable(struct fhci_hcd *fhci)
131{
132 struct fhci_usb *usb = fhci->usb_lld;
133
134 fhci_usb_disable_interrupt(usb);
135 fhci_port_disable(fhci);
136
137 /* disable the usb controller */
138 if (usb->port_status == FHCI_PORT_FULL ||
139 usb->port_status == FHCI_PORT_LOW)
140 fhci_device_disconnected_interrupt(fhci);
141
cf61fdb9 142 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
236dd4d1
AV		 143
144 return 0;
145}
146
147/* check the bus state by polling the QE bit on the IO ports */
148int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
149{
150 u8 bits = 0;
151
152 /* check USBOE,if transmitting,exit */
153 if (!gpio_get_value(fhci->gpios[GPIO_USBOE]))
154 return -1;
155
156 /* check USBRP */
157 if (gpio_get_value(fhci->gpios[GPIO_USBRP]))
158 bits |= 0x2;
159
160 /* check USBRN */
161 if (gpio_get_value(fhci->gpios[GPIO_USBRN]))
162 bits |= 0x1;
163
164 return bits;
165}
166
167static void fhci_mem_free(struct fhci_hcd *fhci)
168{
169 struct ed *ed;
170 struct ed *next_ed;
171 struct td *td;
172 struct td *next_td;
173
174 list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
175 list_del(&ed->node);
176 kfree(ed);
177 }
178
179 list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
180 list_del(&td->node);
181 kfree(td);
182 }
183
184 kfree(fhci->vroot_hub);
185 fhci->vroot_hub = NULL;
186
187 kfree(fhci->hc_list);
188 fhci->hc_list = NULL;
189}
190
191static int fhci_mem_init(struct fhci_hcd *fhci)
192{
193 int i;
194
195 fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
196 if (!fhci->hc_list)
197 goto err;
198
199 INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
200 INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
201 INIT_LIST_HEAD(&fhci->hc_list->iso_list);
202 INIT_LIST_HEAD(&fhci->hc_list->intr_list);
203 INIT_LIST_HEAD(&fhci->hc_list->done_list);
204
205 fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
206 if (!fhci->vroot_hub)
207 goto err;
208
209 INIT_LIST_HEAD(&fhci->empty_eds);
210 INIT_LIST_HEAD(&fhci->empty_tds);
211
212 /* initialize work queue to handle done list */
213 fhci_tasklet.data = (unsigned long)fhci;
214 fhci->process_done_task = &fhci_tasklet;
215
216 for (i = 0; i < MAX_TDS; i++) {
217 struct td *td;
218
219 td = kmalloc(sizeof(*td), GFP_KERNEL);
220 if (!td)
221 goto err;
222 fhci_recycle_empty_td(fhci, td);
223 }
224 for (i = 0; i < MAX_EDS; i++) {
225 struct ed *ed;
226
227 ed = kmalloc(sizeof(*ed), GFP_KERNEL);
228 if (!ed)
229 goto err;
230 fhci_recycle_empty_ed(fhci, ed);
231 }
232
233 fhci->active_urbs = 0;
234 return 0;
235err:
236 fhci_mem_free(fhci);
237 return -ENOMEM;
238}
239
240/* destroy the fhci_usb structure */
241static void fhci_usb_free(void *lld)
242{
243 struct fhci_usb *usb = lld;
ae35fe9e 244 struct fhci_hcd *fhci;
236dd4d1
AV		 245
246 if (usb) {
ae35fe9e 247 fhci = usb->fhci;
236dd4d1
AV		 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 */
256static 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
cf61fdb9 286 out_8(&usb->fhci->regs->usb_usmod, USB_MODE_HOST | USB_MODE_EN);
236dd4d1
AV		 287
288 /* clearing the mask register */
cf61fdb9 289 out_be16(&usb->fhci->regs->usb_usbmr, 0);
236dd4d1
AV		 290
291 /* initialing the event register */
cf61fdb9 292 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
236dd4d1
AV		 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 */
303static 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);
2652de71 309 if (!usb)
236dd4d1 310 return NULL;
236dd4d1
AV		 311
312 usb->fhci = fhci;
313 usb->hc_list = fhci->hc_list;
314 usb->vroot_hub = fhci->vroot_hub;
315
316 usb->transfer_confirm = fhci_transfer_confirm_callback;
317
318 return usb;
319}
320
321static int fhci_start(struct usb_hcd *hcd)
322{
323 int ret;
324 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
325
326 ret = fhci_mem_init(fhci);
327 if (ret) {
328 fhci_err(fhci, "failed to allocate memory\n");
329 goto err;
330 }
331
332 fhci->usb_lld = fhci_create_lld(fhci);
333 if (!fhci->usb_lld) {
334 fhci_err(fhci, "low level driver config failed\n");
335 ret = -ENOMEM;
336 goto err;
337 }
338
339 ret = fhci_usb_init(fhci);
340 if (ret) {
341 fhci_err(fhci, "low level driver initialize failed\n");
342 goto err;
343 }
344
345 spin_lock_init(&fhci->lock);
346
347 /* connect the virtual root hub */
348 fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */
349 fhci->vroot_hub->hub.wHubStatus = 0;
350 fhci->vroot_hub->hub.wHubChange = 0;
351 fhci->vroot_hub->port.wPortStatus = 0;
352 fhci->vroot_hub->port.wPortChange = 0;
353
354 hcd->state = HC_STATE_RUNNING;
355
356 /*
37ebb549 357 * From here on, hub_wq concurrently accesses the root
236dd4d1 358 * hub; drivers will be talking to enumerated devices.
37ebb549 359 * (On restart paths, hub_wq already knows about the root
236dd4d1
AV		 360 * hub and could find work as soon as we wrote FLAG_CF.)
361 *
37ebb549 362 * Before this point the HC was idle/ready. After, hub_wq
236dd4d1
AV		 363 * and device drivers may start it running.
364 */
365 fhci_usb_enable(fhci);
366 return 0;
367err:
368 fhci_mem_free(fhci);
369 return ret;
370}
371
372static void fhci_stop(struct usb_hcd *hcd)
373{
374 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
375
376 fhci_usb_disable_interrupt(fhci->usb_lld);
377 fhci_usb_disable(fhci);
378
379 fhci_usb_free(fhci->usb_lld);
380 fhci->usb_lld = NULL;
381 fhci_mem_free(fhci);
382}
383
384static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
385 gfp_t mem_flags)
386{
387 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
388 u32 pipe = urb->pipe;
389 int ret;
390 int i;
391 int size = 0;
392 struct urb_priv *urb_priv;
393 unsigned long flags;
394
395 switch (usb_pipetype(pipe)) {
396 case PIPE_CONTROL:
397 /* 1 td fro setup,1 for ack */
398 size = 2;
28926994 399 fallthrough;
236dd4d1 400 case PIPE_BULK:
25985edc 401 /* one td for every 4096 bytes(can be up to 8k) */
236dd4d1
AV		 402 size += urb->transfer_buffer_length / 4096;
403 /* ...add for any remaining bytes... */
404 if ((urb->transfer_buffer_length % 4096) != 0)
405 size++;
406 /* ..and maybe a zero length packet to wrap it up */
407 if (size == 0)
408 size++;
409 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
410 && (urb->transfer_buffer_length
411 % usb_maxpacket(urb->dev, pipe,
412 usb_pipeout(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(sizeof(*urb_priv), mem_flags);
430 if (!urb_priv)
431 return -ENOMEM;
432
433 /* allocate the private part of the URB */
4585ef11 434 urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
236dd4d1
AV		 435 if (!urb_priv->tds) {
436 kfree(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);
455err:
456 if (ret) {
457 kfree(urb_priv->tds);
458 kfree(urb_priv);
459 }
460 spin_unlock_irqrestore(&fhci->lock, flags);
461 return ret;
462}
463
464/* dequeue FHCI URB */
465static 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
501out2:
502 spin_unlock_irqrestore(&fhci->lock, flags);
503out:
504 return ret;
505}
506
507static 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, td->urb);
521 }
522 fhci_recycle_empty_ed(fhci, ed);
523 ep->hcpriv = NULL;
524 }
525 spin_unlock_irqrestore(&fhci->lock, flags);
526}
527
528static 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
535static 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,
7b81cb6b 542 .flags = HCD_DMA | HCD_USB11 | HCD_MEMORY,
236dd4d1
AV		 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
41ac7b3a 561static int of_fhci_probe(struct platform_device *ofdev)
236dd4d1
AV		 562{
563 struct device *dev = &ofdev->dev;
61c7a080 564 struct device_node *node = dev->of_node;
236dd4d1
AV		 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, "mode", NULL);
581 if (sprop && strcmp(sprop, "host"))
582 return -ENODEV;
583
6866ac9d 584 hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
236dd4d1
AV		 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, hcd);
593
594 iprop = of_get_property(node, "hub-power-budget", &size);
595 if (iprop && size == sizeof(*iprop))
596 hcd->power_budget = *iprop;
597
598 /* FHCI registers. */
599 ret = of_address_to_resource(node, 0, &usb_regs);
600 if (ret) {
601 dev_err(dev, "could not get regs\n");
602 goto err_regs;
603 }
604
28f65c11 605 hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
236dd4d1
AV		 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, "reg", &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
39eb4ed5 621 pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64);
236dd4d1
AV		 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 }
39eb4ed5
JT		 627
628 qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB,
629 QE_CR_PROTOCOL_UNSPECIFIED, pram_addr);
236dd4d1
AV		 630 fhci->pram = cpm_muram_addr(pram_addr);
631
632 /* GPIOs and pins */
633 for (i = 0; i < NUM_GPIOS; i++) {
634 int gpio;
635 enum of_gpio_flags flags;
636
637 gpio = of_get_gpio_flags(node, i, &flags);
638 fhci->gpios[i] = gpio;
639 fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
640
641 if (!gpio_is_valid(gpio)) {
642 if (i < GPIO_SPEED) {
643 dev_err(dev, "incorrect GPIO%d: %d\n",
644 i, gpio);
645 goto err_gpios;
646 } else {
647 dev_info(dev, "assuming board doesn't have "
648 "%s gpio\n", i == GPIO_SPEED ?
649 "speed" : "power");
650 continue;
651 }
652 }
653
6866ac9d 654 ret = gpio_request(gpio, dev_name(dev));
236dd4d1
AV		 655 if (ret) {
656 dev_err(dev, "failed to request gpio %d", i);
657 goto err_gpios;
658 }
659
660 if (i >= GPIO_SPEED) {
661 ret = gpio_direction_output(gpio, 0);
662 if (ret) {
663 dev_err(dev, "failed to set gpio %d as "
664 "an output\n", i);
665 i++;
666 goto err_gpios;
667 }
668 }
669 }
670
671 for (j = 0; j < NUM_PINS; j++) {
61c7a080 672 fhci->pins[j] = qe_pin_request(node, j);
236dd4d1
AV		 673 if (IS_ERR(fhci->pins[j])) {
674 ret = PTR_ERR(fhci->pins[j]);
675 dev_err(dev, "can't get pin %d: %d\n", j, ret);
676 goto err_pins;
677 }
678 }
679
680 /* Frame limit timer and its interrupt. */
681 fhci->timer = gtm_get_timer16();
682 if (IS_ERR(fhci->timer)) {
683 ret = PTR_ERR(fhci->timer);
684 dev_err(dev, "failed to request qe timer: %i", ret);
685 goto err_get_timer;
686 }
687
688 ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
b5dd18d8 689 0, "qe timer (usb)", hcd);
236dd4d1
AV		 690 if (ret) {
691 dev_err(dev, "failed to request timer irq");
692 goto err_timer_irq;
693 }
694
695 /* USB Host interrupt. */
696 usb_irq = irq_of_parse_and_map(node, 0);
697 if (usb_irq == NO_IRQ) {
698 dev_err(dev, "could not get usb irq\n");
699 ret = -EINVAL;
700 goto err_usb_irq;
701 }
702
703 /* Clocks. */
704 sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
705 if (sprop) {
706 fhci->fullspeed_clk = qe_clock_source(sprop);
707 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
708 dev_err(dev, "wrong fullspeed-clock\n");
709 ret = -EINVAL;
710 goto err_clocks;
711 }
712 }
713
714 sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
715 if (sprop) {
716 fhci->lowspeed_clk = qe_clock_source(sprop);
717 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
718 dev_err(dev, "wrong lowspeed-clock\n");
719 ret = -EINVAL;
720 goto err_clocks;
721 }
722 }
723
724 if (fhci->fullspeed_clk == QE_CLK_NONE &&
725 fhci->lowspeed_clk == QE_CLK_NONE) {
726 dev_err(dev, "no clocks specified\n");
727 ret = -EINVAL;
728 goto err_clocks;
729 }
730
731 dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
732
733 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
734
735 /* Start with full-speed, if possible. */
736 if (fhci->fullspeed_clk != QE_CLK_NONE) {
737 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
738 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
739 } else {
740 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
741 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
742 }
743
744 /* Clear and disable any pending interrupts. */
cf61fdb9
GMF		 745 out_be16(&fhci->regs->usb_usber, 0xffff);
746 out_be16(&fhci->regs->usb_usbmr, 0);
236dd4d1 747
b5dd18d8 748 ret = usb_add_hcd(hcd, usb_irq, 0);
236dd4d1
AV		 749 if (ret < 0)
750 goto err_add_hcd;
751
3c9740a1
PC		 752 device_wakeup_enable(hcd->self.controller);
753
236dd4d1
AV		 754 fhci_dfs_create(fhci);
755
756 return 0;
757
758err_add_hcd:
759err_clocks:
760 irq_dispose_mapping(usb_irq);
761err_usb_irq:
762 free_irq(fhci->timer->irq, hcd);
763err_timer_irq:
764 gtm_put_timer16(fhci->timer);
765err_get_timer:
766err_pins:
767 while (--j >= 0)
768 qe_pin_free(fhci->pins[j]);
769err_gpios:
770 while (--i >= 0) {
771 if (gpio_is_valid(fhci->gpios[i]))
772 gpio_free(fhci->gpios[i]);
773 }
774 cpm_muram_free(pram_addr);
775err_pram:
776 iounmap(hcd->regs);
777err_regs:
778 usb_put_hcd(hcd);
779 return ret;
780}
781
fb4e98ab 782static int fhci_remove(struct device *dev)
236dd4d1
AV		 783{
784 struct usb_hcd *hcd = dev_get_drvdata(dev);
785 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
786 int i;
787 int j;
788
789 usb_remove_hcd(hcd);
790 free_irq(fhci->timer->irq, hcd);
791 gtm_put_timer16(fhci->timer);
792 cpm_muram_free(cpm_muram_offset(fhci->pram));
793 for (i = 0; i < NUM_GPIOS; i++) {
794 if (!gpio_is_valid(fhci->gpios[i]))
795 continue;
796 gpio_free(fhci->gpios[i]);
797 }
798 for (j = 0; j < NUM_PINS; j++)
799 qe_pin_free(fhci->pins[j]);
800 fhci_dfs_destroy(fhci);
801 usb_put_hcd(hcd);
802 return 0;
803}
804
fb4e98ab 805static int of_fhci_remove(struct platform_device *ofdev)
236dd4d1
AV		 806{
807 return fhci_remove(&ofdev->dev);
808}
809
c4386ad0 810static const struct of_device_id of_fhci_match[] = {
236dd4d1
AV		 811 { .compatible = "fsl,mpc8323-qe-usb", },
812 {},
813};
814MODULE_DEVICE_TABLE(of, of_fhci_match);
815
d35fb641 816static struct platform_driver of_fhci_driver = {
4018294b
GL		 817 .driver = {
818 .name = "fsl,usb-fhci",
4018294b
GL		 819 .of_match_table = of_fhci_match,
820 },
236dd4d1 821 .probe = of_fhci_probe,
7690417d 822 .remove = of_fhci_remove,
236dd4d1
AV		 823};
824
cc27c96c 825module_platform_driver(of_fhci_driver);
236dd4d1
AV		 826
827MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
828MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
829 "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
830 "Anton Vorontsov <avorontsov@ru.mvista.com>");
831MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)