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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/usb/hcd.h>
29#include <linux/of_platform.h>
30#include <linux/of_gpio.h>
31#include <linux/slab.h>
32#include <asm/qe.h>
33#include <asm/fsl_gtm.h>
34#include "fhci.h"
35
36void 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
49void 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
59u16 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 */
65static 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 */
82void 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/* disable the usb interrupt */
102void 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 /* disable 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 */
118static 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 */
132static 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 */
150int 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
169static 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
193static 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;
237err:
238 fhci_mem_free(fhci);
239 return -ENOMEM;
240}
241
242/* destroy the fhci_usb structure */
243static void fhci_usb_free(void *lld)
244{
245 struct fhci_usb *usb = lld;
246 struct fhci_hcd *fhci;
247
248 if (usb) {
249 fhci = usb->fhci;
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 */
258static 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 */
305static 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
325static 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;
371err:
372 fhci_mem_free(fhci);
373 return ret;
374}
375
376static 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
388static 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 up to 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 */
437 urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
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);
458err:
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 */
468static 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
504out2:
505 spin_unlock_irqrestore(&fhci->lock, flags);
506out:
507 return ret;
508}
509
510static 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
531static 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
538static 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
564static int __devinit of_fhci_probe(struct platform_device *ofdev)
565{
566 struct device *dev = &ofdev->dev;
567 struct device_node *node = dev->of_node;
568 struct usb_hcd *hcd;
569 struct fhci_hcd *fhci;
570 struct resource usb_regs;
571 unsigned long pram_addr;
572 unsigned int usb_irq;
573 const char *sprop;
574 const u32 *iprop;
575 int size;
576 int ret;
577 int i;
578 int j;
579
580 if (usb_disabled())
581 return -ENODEV;
582
583 sprop = of_get_property(node, "mode", NULL);
584 if (sprop && strcmp(sprop, "host"))
585 return -ENODEV;
586
587 hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
588 if (!hcd) {
589 dev_err(dev, "could not create hcd\n");
590 return -ENOMEM;
591 }
592
593 fhci = hcd_to_fhci(hcd);
594 hcd->self.controller = dev;
595 dev_set_drvdata(dev, hcd);
596
597 iprop = of_get_property(node, "hub-power-budget", &size);
598 if (iprop && size == sizeof(*iprop))
599 hcd->power_budget = *iprop;
600
601 /* FHCI registers. */
602 ret = of_address_to_resource(node, 0, &usb_regs);
603 if (ret) {
604 dev_err(dev, "could not get regs\n");
605 goto err_regs;
606 }
607
608 hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
609 if (!hcd->regs) {
610 dev_err(dev, "could not ioremap regs\n");
611 ret = -ENOMEM;
612 goto err_regs;
613 }
614 fhci->regs = hcd->regs;
615
616 /* Parameter RAM. */
617 iprop = of_get_property(node, "reg", &size);
618 if (!iprop || size < sizeof(*iprop) * 4) {
619 dev_err(dev, "can't get pram offset\n");
620 ret = -EINVAL;
621 goto err_pram;
622 }
623
624 pram_addr = cpm_muram_alloc_fixed(iprop[2], FHCI_PRAM_SIZE);
625 if (IS_ERR_VALUE(pram_addr)) {
626 dev_err(dev, "failed to allocate usb pram\n");
627 ret = -ENOMEM;
628 goto err_pram;
629 }
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
654 ret = gpio_request(gpio, dev_name(dev));
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++) {
672 fhci->pins[j] = qe_pin_request(node, j);
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,
689 IRQF_DISABLED, "qe timer (usb)", hcd);
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. */
745 out_be16(&fhci->regs->usb_event, 0xffff);
746 out_be16(&fhci->regs->usb_mask, 0);
747
748 ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED);
749 if (ret < 0)
750 goto err_add_hcd;
751
752 fhci_dfs_create(fhci);
753
754 return 0;
755
756err_add_hcd:
757err_clocks:
758 irq_dispose_mapping(usb_irq);
759err_usb_irq:
760 free_irq(fhci->timer->irq, hcd);
761err_timer_irq:
762 gtm_put_timer16(fhci->timer);
763err_get_timer:
764err_pins:
765 while (--j >= 0)
766 qe_pin_free(fhci->pins[j]);
767err_gpios:
768 while (--i >= 0) {
769 if (gpio_is_valid(fhci->gpios[i]))
770 gpio_free(fhci->gpios[i]);
771 }
772 cpm_muram_free(pram_addr);
773err_pram:
774 iounmap(hcd->regs);
775err_regs:
776 usb_put_hcd(hcd);
777 return ret;
778}
779
780static int __devexit fhci_remove(struct device *dev)
781{
782 struct usb_hcd *hcd = dev_get_drvdata(dev);
783 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
784 int i;
785 int j;
786
787 usb_remove_hcd(hcd);
788 free_irq(fhci->timer->irq, hcd);
789 gtm_put_timer16(fhci->timer);
790 cpm_muram_free(cpm_muram_offset(fhci->pram));
791 for (i = 0; i < NUM_GPIOS; i++) {
792 if (!gpio_is_valid(fhci->gpios[i]))
793 continue;
794 gpio_free(fhci->gpios[i]);
795 }
796 for (j = 0; j < NUM_PINS; j++)
797 qe_pin_free(fhci->pins[j]);
798 fhci_dfs_destroy(fhci);
799 usb_put_hcd(hcd);
800 return 0;
801}
802
803static int __devexit of_fhci_remove(struct platform_device *ofdev)
804{
805 return fhci_remove(&ofdev->dev);
806}
807
808static const struct of_device_id of_fhci_match[] = {
809 { .compatible = "fsl,mpc8323-qe-usb", },
810 {},
811};
812MODULE_DEVICE_TABLE(of, of_fhci_match);
813
814static struct platform_driver of_fhci_driver = {
815 .driver = {
816 .name = "fsl,usb-fhci",
817 .owner = THIS_MODULE,
818 .of_match_table = of_fhci_match,
819 },
820 .probe = of_fhci_probe,
821 .remove = __devexit_p(of_fhci_remove),
822};
823
824static int __init fhci_module_init(void)
825{
826 return platform_driver_register(&of_fhci_driver);
827}
828module_init(fhci_module_init);
829
830static void __exit fhci_module_exit(void)
831{
832 platform_driver_unregister(&of_fhci_driver);
833}
834module_exit(fhci_module_exit);
835
836MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
837MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
838 "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
839 "Anton Vorontsov <avorontsov@ru.mvista.com>");
840MODULE_LICENSE("GPL");
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
35void 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
48void 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
58u16 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 */
64static u32 endpoint_zero_init(struct fhci_usb *usb,
65 enum fhci_mem_alloc data_mem,
66 u32 ring_len)
67{
68 u32 rc;
69
70 rc = fhci_create_ep(usb, data_mem, ring_len);
71 if (rc)
72 return rc;
73
74 /* inilialize endpoint registers */
75 fhci_init_ep_registers(usb, usb->ep0, data_mem);
76
77 return 0;
78}
79
80/* enable the USB interrupts */
81void fhci_usb_enable_interrupt(struct fhci_usb *usb)
82{
83 struct fhci_hcd *fhci = usb->fhci;
84
85 if (usb->intr_nesting_cnt == 1) {
86 /* initialize the USB interrupt */
87 enable_irq(fhci_to_hcd(fhci)->irq);
88
89 /* initialize the event register and mask register */
90 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
91 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
92
93 /* enable the timer interrupts */
94 enable_irq(fhci->timer->irq);
95 } else if (usb->intr_nesting_cnt > 1)
96 fhci_info(fhci, "unbalanced USB interrupts nesting\n");
97 usb->intr_nesting_cnt--;
98}
99
100/* disable the usb interrupt */
101void 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(fhci->timer->irq);
108
109 /* disable the usb interrupt */
110 disable_irq_nosync(fhci_to_hcd(fhci)->irq);
111 out_be16(&usb->fhci->regs->usb_usbmr, 0);
112 }
113 usb->intr_nesting_cnt++;
114}
115
116/* enable the USB controller */
117static 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 */
131static 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 */
149int 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(fhci->gpiods[GPIO_USBOE]))
155 return -1;
156
157 /* check USBRP */
158 if (gpiod_get_value(fhci->gpiods[GPIO_USBRP]))
159 bits |= 0x2;
160
161 /* check USBRN */
162 if (gpiod_get_value(fhci->gpiods[GPIO_USBRN]))
163 bits |= 0x1;
164
165 return bits;
166}
167
168static void fhci_mem_free(struct fhci_hcd *fhci)
169{
170 struct ed *ed;
171 struct ed *next_ed;
172 struct td *td;
173 struct td *next_td;
174
175 list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
176 list_del(&ed->node);
177 kfree(ed);
178 }
179
180 list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
181 list_del(&td->node);
182 kfree(td);
183 }
184
185 kfree(fhci->vroot_hub);
186 fhci->vroot_hub = NULL;
187
188 kfree(fhci->hc_list);
189 fhci->hc_list = NULL;
190}
191
192static int fhci_mem_init(struct fhci_hcd *fhci)
193{
194 int i;
195
196 fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
197 if (!fhci->hc_list)
198 goto err;
199
200 INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
201 INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
202 INIT_LIST_HEAD(&fhci->hc_list->iso_list);
203 INIT_LIST_HEAD(&fhci->hc_list->intr_list);
204 INIT_LIST_HEAD(&fhci->hc_list->done_list);
205
206 fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
207 if (!fhci->vroot_hub)
208 goto err;
209
210 INIT_LIST_HEAD(&fhci->empty_eds);
211 INIT_LIST_HEAD(&fhci->empty_tds);
212
213 /* initialize work queue to handle done list */
214 fhci_tasklet.data = (unsigned long)fhci;
215 fhci->process_done_task = &fhci_tasklet;
216
217 for (i = 0; i < MAX_TDS; i++) {
218 struct td *td;
219
220 td = kmalloc(sizeof(*td), GFP_KERNEL);
221 if (!td)
222 goto err;
223 fhci_recycle_empty_td(fhci, td);
224 }
225 for (i = 0; i < MAX_EDS; i++) {
226 struct ed *ed;
227
228 ed = kmalloc(sizeof(*ed), GFP_KERNEL);
229 if (!ed)
230 goto err;
231 fhci_recycle_empty_ed(fhci, ed);
232 }
233
234 fhci->active_urbs = 0;
235 return 0;
236err:
237 fhci_mem_free(fhci);
238 return -ENOMEM;
239}
240
241/* destroy the fhci_usb structure */
242static 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, FHCI_PORT_POWER_OFF);
250 fhci_ep0_free(usb);
251 kfree(usb->actual_frame);
252 kfree(usb);
253 }
254}
255
256/* initialize the USB */
257static 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(sizeof(*usb->actual_frame), GFP_KERNEL);
268 if (!usb->actual_frame) {
269 fhci_usb_free(usb);
270 return -ENOMEM;
271 }
272
273 INIT_LIST_HEAD(&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(usb);
297 return -EINVAL;
298 }
299
300 return 0;
301}
302
303/* initialize the fhci_usb struct and the corresponding data staruct */
304static 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(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
322static 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;
368err:
369 fhci_mem_free(fhci);
370 return ret;
371}
372
373static void fhci_stop(struct usb_hcd *hcd)
374{
375 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
376
377 fhci_usb_disable_interrupt(fhci->usb_lld);
378 fhci_usb_disable(fhci);
379
380 fhci_usb_free(fhci->usb_lld);
381 fhci->usb_lld = NULL;
382 fhci_mem_free(fhci);
383}
384
385static 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(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(sizeof(*urb_priv), mem_flags);
430 if (!urb_priv)
431 return -ENOMEM;
432
433 /* allocate the private part of the URB */
434 urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
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,
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
561static 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, "mode", NULL);
581 if (sprop && strcmp(sprop, "host"))
582 return -ENODEV;
583
584 hcd = usb_create_hcd(&fhci_driver, dev, 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, 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
605 hcd->regs = ioremap(usb_regs.start, resource_size(&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, "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
621 pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 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, pram_addr);
630 fhci->pram = cpm_muram_addr(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, i, GPIOD_IN);
637
638 else
639 fhci->gpiods[i] = devm_gpiod_get_index_optional(dev,
640 NULL, i, GPIOD_OUT_LOW);
641
642 if (IS_ERR(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, j);
656 if (IS_ERR(fhci->pins[j])) {
657 ret = PTR_ERR(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(fhci->timer)) {
666 ret = PTR_ERR(fhci->timer);
667 dev_err(dev, "failed to request qe timer: %i", ret);
668 goto err_get_timer;
669 }
670
671 ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
672 0, "qe timer (usb)", 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, 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, "fsl,fullspeed-clock", NULL);
688 if (sprop) {
689 fhci->fullspeed_clk = qe_clock_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, "fsl,lowspeed-clock", NULL);
698 if (sprop) {
699 fhci->lowspeed_clk = qe_clock_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, 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, FHCI_PORT_FULL);
721 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
722 } else {
723 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
724 qe_usb_clock_set(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, usb_irq, 0);
732 if (ret < 0)
733 goto err_add_hcd;
734
735 device_wakeup_enable(hcd->self.controller);
736
737 fhci_dfs_create(fhci);
738
739 return 0;
740
741err_add_hcd:
742err_clocks:
743 irq_dispose_mapping(usb_irq);
744err_usb_irq:
745 free_irq(fhci->timer->irq, hcd);
746err_timer_irq:
747 gtm_put_timer16(fhci->timer);
748err_get_timer:
749err_pins:
750 while (--j >= 0)
751 qe_pin_free(fhci->pins[j]);
752err_gpios:
753 cpm_muram_free(pram_addr);
754err_pram:
755 iounmap(hcd->regs);
756err_regs:
757 usb_put_hcd(hcd);
758 return ret;
759}
760
761static 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(cpm_muram_offset(fhci->pram));
771 for (j = 0; j < NUM_PINS; j++)
772 qe_pin_free(fhci->pins[j]);
773 fhci_dfs_destroy(fhci);
774 usb_put_hcd(hcd);
775}
776
777static void of_fhci_remove(struct platform_device *ofdev)
778{
779 fhci_remove(&ofdev->dev);
780}
781
782static const struct of_device_id of_fhci_match[] = {
783 { .compatible = "fsl,mpc8323-qe-usb", },
784 {},
785};
786MODULE_DEVICE_TABLE(of, of_fhci_match);
787
788static 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
797module_platform_driver(of_fhci_driver);
798
799MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
800MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
801 "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
802 "Anton Vorontsov <avorontsov@ru.mvista.com>");
803MODULE_LICENSE("GPL");