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Add linux-next specific files for 20110421
[linux-2.6/next.git] / drivers / usb / musb / musb_core.c
blobf10ff00ca09ea377bbd7dd6167e3723260bd78f9
1 /*
2 * MUSB OTG driver core code
3 *
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35 /*
36 * Inventra (Multipoint) Dual-Role Controller Driver for Linux.
37 *
38 * This consists of a Host Controller Driver (HCD) and a peripheral
39 * controller driver implementing the "Gadget" API; OTG support is
40 * in the works. These are normal Linux-USB controller drivers which
41 * use IRQs and have no dedicated thread.
42 *
43 * This version of the driver has only been used with products from
44 * Texas Instruments. Those products integrate the Inventra logic
45 * with other DMA, IRQ, and bus modules, as well as other logic that
46 * needs to be reflected in this driver.
47 *
48 *
49 * NOTE: the original Mentor code here was pretty much a collection
50 * of mechanisms that don't seem to have been fully integrated/working
51 * for *any* Linux kernel version. This version aims at Linux 2.6.now,
52 * Key open issues include:
53 *
54 * - Lack of host-side transaction scheduling, for all transfer types.
55 * The hardware doesn't do it; instead, software must.
56 *
57 * This is not an issue for OTG devices that don't support external
58 * hubs, but for more "normal" USB hosts it's a user issue that the
59 * "multipoint" support doesn't scale in the expected ways. That
60 * includes DaVinci EVM in a common non-OTG mode.
61 *
62 * * Control and bulk use dedicated endpoints, and there's as
63 * yet no mechanism to either (a) reclaim the hardware when
64 * peripherals are NAKing, which gets complicated with bulk
65 * endpoints, or (b) use more than a single bulk endpoint in
66 * each direction.
67 *
68 * RESULT: one device may be perceived as blocking another one.
69 *
70 * * Interrupt and isochronous will dynamically allocate endpoint
71 * hardware, but (a) there's no record keeping for bandwidth;
72 * (b) in the common case that few endpoints are available, there
73 * is no mechanism to reuse endpoints to talk to multiple devices.
74 *
75 * RESULT: At one extreme, bandwidth can be overcommitted in
76 * some hardware configurations, no faults will be reported.
77 * At the other extreme, the bandwidth capabilities which do
78 * exist tend to be severely undercommitted. You can't yet hook
79 * up both a keyboard and a mouse to an external USB hub.
80 */
81
82 /*
83 * This gets many kinds of configuration information:
84 * - Kconfig for everything user-configurable
85 * - platform_device for addressing, irq, and platform_data
86 * - platform_data is mostly for board-specific informarion
87 * (plus recentrly, SOC or family details)
88 *
89 * Most of the conditional compilation will (someday) vanish.
90 */
91
92 #include <linux/module.h>
93 #include <linux/kernel.h>
94 #include <linux/sched.h>
95 #include <linux/slab.h>
96 #include <linux/init.h>
97 #include <linux/list.h>
98 #include <linux/kobject.h>
99 #include <linux/platform_device.h>
100 #include <linux/io.h>
101
102 #include "musb_core.h"
103
104 #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
105
106
107 unsigned musb_debug;
108 module_param_named(debug, musb_debug, uint, S_IRUGO | S_IWUSR);
109 MODULE_PARM_DESC(debug, "Debug message level. Default = 0");
110
111 #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
112 #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"
113
114 #define MUSB_VERSION "6.0"
115
116 #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION
117
118 #define MUSB_DRIVER_NAME "musb-hdrc"
119 const char musb_driver_name[] = MUSB_DRIVER_NAME;
120
121 MODULE_DESCRIPTION(DRIVER_INFO);
122 MODULE_AUTHOR(DRIVER_AUTHOR);
123 MODULE_LICENSE("GPL");
124 MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
125
126
127 /*-------------------------------------------------------------------------*/
128
129 static inline struct musb *dev_to_musb(struct device *dev)
130 {
131 return dev_get_drvdata(dev);
132 }
133
134 /*-------------------------------------------------------------------------*/
135
136 #ifndef CONFIG_BLACKFIN
137 static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset)
138 {
139 void __iomem *addr = otg->io_priv;
140 int i = 0;
141 u8 r;
142 u8 power;
143
144 /* Make sure the transceiver is not in low power mode */
145 power = musb_readb(addr, MUSB_POWER);
146 power &= ~MUSB_POWER_SUSPENDM;
147 musb_writeb(addr, MUSB_POWER, power);
148
149 /* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the
150 * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
151 */
152
153 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
154 musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
155 MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
156
157 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
158 & MUSB_ULPI_REG_CMPLT)) {
159 i++;
160 if (i == 10000) {
161 DBG(3, "ULPI read timed out\n");
162 return -ETIMEDOUT;
163 }
164
165 }
166 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
167 r &= ~MUSB_ULPI_REG_CMPLT;
168 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
169
170 return musb_readb(addr, MUSB_ULPI_REG_DATA);
171 }
172
173 static int musb_ulpi_write(struct otg_transceiver *otg,
174 u32 offset, u32 data)
175 {
176 void __iomem *addr = otg->io_priv;
177 int i = 0;
178 u8 r = 0;
179 u8 power;
180
181 /* Make sure the transceiver is not in low power mode */
182 power = musb_readb(addr, MUSB_POWER);
183 power &= ~MUSB_POWER_SUSPENDM;
184 musb_writeb(addr, MUSB_POWER, power);
185
186 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
187 musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data);
188 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
189
190 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
191 & MUSB_ULPI_REG_CMPLT)) {
192 i++;
193 if (i == 10000) {
194 DBG(3, "ULPI write timed out\n");
195 return -ETIMEDOUT;
196 }
197 }
198
199 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
200 r &= ~MUSB_ULPI_REG_CMPLT;
201 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
202
203 return 0;
204 }
205 #else
206 #define musb_ulpi_read NULL
207 #define musb_ulpi_write NULL
208 #endif
209
210 static struct otg_io_access_ops musb_ulpi_access = {
211 .read = musb_ulpi_read,
212 .write = musb_ulpi_write,
213 };
214
215 /*-------------------------------------------------------------------------*/
216
217 #if !defined(CONFIG_USB_MUSB_TUSB6010) && !defined(CONFIG_USB_MUSB_BLACKFIN)
218
219 /*
220 * Load an endpoint's FIFO
221 */
222 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
223 {
224 void __iomem *fifo = hw_ep->fifo;
225
226 prefetch((u8 *)src);
227
228 DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
229 'T', hw_ep->epnum, fifo, len, src);
230
231 /* we can't assume unaligned reads work */
232 if (likely((0x01 & (unsigned long) src) == 0)) {
233 u16 index = 0;
234
235 /* best case is 32bit-aligned source address */
236 if ((0x02 & (unsigned long) src) == 0) {
237 if (len >= 4) {
238 writesl(fifo, src + index, len >> 2);
239 index += len & ~0x03;
240 }
241 if (len & 0x02) {
242 musb_writew(fifo, 0, *(u16 *)&src[index]);
243 index += 2;
244 }
245 } else {
246 if (len >= 2) {
247 writesw(fifo, src + index, len >> 1);
248 index += len & ~0x01;
249 }
250 }
251 if (len & 0x01)
252 musb_writeb(fifo, 0, src[index]);
253 } else {
254 /* byte aligned */
255 writesb(fifo, src, len);
256 }
257 }
258
259 #if !defined(CONFIG_USB_MUSB_AM35X)
260 /*
261 * Unload an endpoint's FIFO
262 */
263 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
264 {
265 void __iomem *fifo = hw_ep->fifo;
266
267 DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
268 'R', hw_ep->epnum, fifo, len, dst);
269
270 /* we can't assume unaligned writes work */
271 if (likely((0x01 & (unsigned long) dst) == 0)) {
272 u16 index = 0;
273
274 /* best case is 32bit-aligned destination address */
275 if ((0x02 & (unsigned long) dst) == 0) {
276 if (len >= 4) {
277 readsl(fifo, dst, len >> 2);
278 index = len & ~0x03;
279 }
280 if (len & 0x02) {
281 *(u16 *)&dst[index] = musb_readw(fifo, 0);
282 index += 2;
283 }
284 } else {
285 if (len >= 2) {
286 readsw(fifo, dst, len >> 1);
287 index = len & ~0x01;
288 }
289 }
290 if (len & 0x01)
291 dst[index] = musb_readb(fifo, 0);
292 } else {
293 /* byte aligned */
294 readsb(fifo, dst, len);
295 }
296 }
297 #endif
298
299 #endif /* normal PIO */
300
301
302 /*-------------------------------------------------------------------------*/
303
304 /* for high speed test mode; see USB 2.0 spec 7.1.20 */
305 static const u8 musb_test_packet[53] = {
306 /* implicit SYNC then DATA0 to start */
307
308 /* JKJKJKJK x9 */
309 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
310 /* JJKKJJKK x8 */
311 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
312 /* JJJJKKKK x8 */
313 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee,
314 /* JJJJJJJKKKKKKK x8 */
315 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
316 /* JJJJJJJK x8 */
317 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd,
318 /* JKKKKKKK x10, JK */
319 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e
320
321 /* implicit CRC16 then EOP to end */
322 };
323
324 void musb_load_testpacket(struct musb *musb)
325 {
326 void __iomem *regs = musb->endpoints[0].regs;
327
328 musb_ep_select(musb->mregs, 0);
329 musb_write_fifo(musb->control_ep,
330 sizeof(musb_test_packet), musb_test_packet);
331 musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY);
332 }
333
334 /*-------------------------------------------------------------------------*/
335
336 const char *otg_state_string(struct musb *musb)
337 {
338 switch (musb->xceiv->state) {
339 case OTG_STATE_A_IDLE: return "a_idle";
340 case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
341 case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
342 case OTG_STATE_A_HOST: return "a_host";
343 case OTG_STATE_A_SUSPEND: return "a_suspend";
344 case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
345 case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
346 case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
347 case OTG_STATE_B_IDLE: return "b_idle";
348 case OTG_STATE_B_SRP_INIT: return "b_srp_init";
349 case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
350 case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
351 case OTG_STATE_B_HOST: return "b_host";
352 default: return "UNDEFINED";
353 }
354 }
355
356 #ifdef CONFIG_USB_MUSB_OTG
357
358 /*
359 * Handles OTG hnp timeouts, such as b_ase0_brst
360 */
361 void musb_otg_timer_func(unsigned long data)
362 {
363 struct musb *musb = (struct musb *)data;
364 unsigned long flags;
365
366 spin_lock_irqsave(&musb->lock, flags);
367 switch (musb->xceiv->state) {
368 case OTG_STATE_B_WAIT_ACON:
369 DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n");
370 musb_g_disconnect(musb);
371 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
372 musb->is_active = 0;
373 break;
374 case OTG_STATE_A_SUSPEND:
375 case OTG_STATE_A_WAIT_BCON:
376 DBG(1, "HNP: %s timeout\n", otg_state_string(musb));
377 musb_platform_set_vbus(musb, 0);
378 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
379 break;
380 default:
381 DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb));
382 }
383 musb->ignore_disconnect = 0;
384 spin_unlock_irqrestore(&musb->lock, flags);
385 }
386
387 /*
388 * Stops the HNP transition. Caller must take care of locking.
389 */
390 void musb_hnp_stop(struct musb *musb)
391 {
392 struct usb_hcd *hcd = musb_to_hcd(musb);
393 void __iomem *mbase = musb->mregs;
394 u8 reg;
395
396 DBG(1, "HNP: stop from %s\n", otg_state_string(musb));
397
398 switch (musb->xceiv->state) {
399 case OTG_STATE_A_PERIPHERAL:
400 musb_g_disconnect(musb);
401 DBG(1, "HNP: back to %s\n", otg_state_string(musb));
402 break;
403 case OTG_STATE_B_HOST:
404 DBG(1, "HNP: Disabling HR\n");
405 hcd->self.is_b_host = 0;
406 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
407 MUSB_DEV_MODE(musb);
408 reg = musb_readb(mbase, MUSB_POWER);
409 reg |= MUSB_POWER_SUSPENDM;
410 musb_writeb(mbase, MUSB_POWER, reg);
411 /* REVISIT: Start SESSION_REQUEST here? */
412 break;
413 default:
414 DBG(1, "HNP: Stopping in unknown state %s\n",
415 otg_state_string(musb));
416 }
417
418 /*
419 * When returning to A state after HNP, avoid hub_port_rebounce(),
420 * which cause occasional OPT A "Did not receive reset after connect"
421 * errors.
422 */
423 musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16);
424 }
425
426 #endif
427
428 /*
429 * Interrupt Service Routine to record USB "global" interrupts.
430 * Since these do not happen often and signify things of
431 * paramount importance, it seems OK to check them individually;
432 * the order of the tests is specified in the manual
433 *
434 * @param musb instance pointer
435 * @param int_usb register contents
436 * @param devctl
437 * @param power
438 */
439
440 static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
441 u8 devctl, u8 power)
442 {
443 irqreturn_t handled = IRQ_NONE;
444
445 DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
446 int_usb);
447
448 /* in host mode, the peripheral may issue remote wakeup.
449 * in peripheral mode, the host may resume the link.
450 * spurious RESUME irqs happen too, paired with SUSPEND.
451 */
452 if (int_usb & MUSB_INTR_RESUME) {
453 handled = IRQ_HANDLED;
454 DBG(3, "RESUME (%s)\n", otg_state_string(musb));
455
456 if (devctl & MUSB_DEVCTL_HM) {
457 #ifdef CONFIG_USB_MUSB_HDRC_HCD
458 void __iomem *mbase = musb->mregs;
459
460 switch (musb->xceiv->state) {
461 case OTG_STATE_A_SUSPEND:
462 /* remote wakeup? later, GetPortStatus
463 * will stop RESUME signaling
464 */
465
466 if (power & MUSB_POWER_SUSPENDM) {
467 /* spurious */
468 musb->int_usb &= ~MUSB_INTR_SUSPEND;
469 DBG(2, "Spurious SUSPENDM\n");
470 break;
471 }
472
473 power &= ~MUSB_POWER_SUSPENDM;
474 musb_writeb(mbase, MUSB_POWER,
475 power | MUSB_POWER_RESUME);
476
477 musb->port1_status |=
478 (USB_PORT_STAT_C_SUSPEND << 16)
479 | MUSB_PORT_STAT_RESUME;
480 musb->rh_timer = jiffies
481 + msecs_to_jiffies(20);
482
483 musb->xceiv->state = OTG_STATE_A_HOST;
484 musb->is_active = 1;
485 usb_hcd_resume_root_hub(musb_to_hcd(musb));
486 break;
487 case OTG_STATE_B_WAIT_ACON:
488 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
489 musb->is_active = 1;
490 MUSB_DEV_MODE(musb);
491 break;
492 default:
493 WARNING("bogus %s RESUME (%s)\n",
494 "host",
495 otg_state_string(musb));
496 }
497 #endif
498 } else {
499 switch (musb->xceiv->state) {
500 #ifdef CONFIG_USB_MUSB_HDRC_HCD
501 case OTG_STATE_A_SUSPEND:
502 /* possibly DISCONNECT is upcoming */
503 musb->xceiv->state = OTG_STATE_A_HOST;
504 usb_hcd_resume_root_hub(musb_to_hcd(musb));
505 break;
506 #endif
507 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
508 case OTG_STATE_B_WAIT_ACON:
509 case OTG_STATE_B_PERIPHERAL:
510 /* disconnect while suspended? we may
511 * not get a disconnect irq...
512 */
513 if ((devctl & MUSB_DEVCTL_VBUS)
514 != (3 << MUSB_DEVCTL_VBUS_SHIFT)
515 ) {
516 musb->int_usb |= MUSB_INTR_DISCONNECT;
517 musb->int_usb &= ~MUSB_INTR_SUSPEND;
518 break;
519 }
520 musb_g_resume(musb);
521 break;
522 case OTG_STATE_B_IDLE:
523 musb->int_usb &= ~MUSB_INTR_SUSPEND;
524 break;
525 #endif
526 default:
527 WARNING("bogus %s RESUME (%s)\n",
528 "peripheral",
529 otg_state_string(musb));
530 }
531 }
532 }
533
534 #ifdef CONFIG_USB_MUSB_HDRC_HCD
535 /* see manual for the order of the tests */
536 if (int_usb & MUSB_INTR_SESSREQ) {
537 void __iomem *mbase = musb->mregs;
538
539 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS
540 && (devctl & MUSB_DEVCTL_BDEVICE)) {
541 DBG(3, "SessReq while on B state\n");
542 return IRQ_HANDLED;
543 }
544
545 DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb));
546
547 /* IRQ arrives from ID pin sense or (later, if VBUS power
548 * is removed) SRP. responses are time critical:
549 * - turn on VBUS (with silicon-specific mechanism)
550 * - go through A_WAIT_VRISE
551 * - ... to A_WAIT_BCON.
552 * a_wait_vrise_tmout triggers VBUS_ERROR transitions
553 */
554 musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
555 musb->ep0_stage = MUSB_EP0_START;
556 musb->xceiv->state = OTG_STATE_A_IDLE;
557 MUSB_HST_MODE(musb);
558 musb_platform_set_vbus(musb, 1);
559
560 handled = IRQ_HANDLED;
561 }
562
563 if (int_usb & MUSB_INTR_VBUSERROR) {
564 int ignore = 0;
565
566 /* During connection as an A-Device, we may see a short
567 * current spikes causing voltage drop, because of cable
568 * and peripheral capacitance combined with vbus draw.
569 * (So: less common with truly self-powered devices, where
570 * vbus doesn't act like a power supply.)
571 *
572 * Such spikes are short; usually less than ~500 usec, max
573 * of ~2 msec. That is, they're not sustained overcurrent
574 * errors, though they're reported using VBUSERROR irqs.
575 *
576 * Workarounds: (a) hardware: use self powered devices.
577 * (b) software: ignore non-repeated VBUS errors.
578 *
579 * REVISIT: do delays from lots of DEBUG_KERNEL checks
580 * make trouble here, keeping VBUS < 4.4V ?
581 */
582 switch (musb->xceiv->state) {
583 case OTG_STATE_A_HOST:
584 /* recovery is dicey once we've gotten past the
585 * initial stages of enumeration, but if VBUS
586 * stayed ok at the other end of the link, and
587 * another reset is due (at least for high speed,
588 * to redo the chirp etc), it might work OK...
589 */
590 case OTG_STATE_A_WAIT_BCON:
591 case OTG_STATE_A_WAIT_VRISE:
592 if (musb->vbuserr_retry) {
593 void __iomem *mbase = musb->mregs;
594
595 musb->vbuserr_retry--;
596 ignore = 1;
597 devctl |= MUSB_DEVCTL_SESSION;
598 musb_writeb(mbase, MUSB_DEVCTL, devctl);
599 } else {
600 musb->port1_status |=
601 USB_PORT_STAT_OVERCURRENT
602 | (USB_PORT_STAT_C_OVERCURRENT << 16);
603 }
604 break;
605 default:
606 break;
607 }
608
609 DBG(1, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
610 otg_state_string(musb),
611 devctl,
612 ({ char *s;
613 switch (devctl & MUSB_DEVCTL_VBUS) {
614 case 0 << MUSB_DEVCTL_VBUS_SHIFT:
615 s = "<SessEnd"; break;
616 case 1 << MUSB_DEVCTL_VBUS_SHIFT:
617 s = "<AValid"; break;
618 case 2 << MUSB_DEVCTL_VBUS_SHIFT:
619 s = "<VBusValid"; break;
620 /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */
621 default:
622 s = "VALID"; break;
623 }; s; }),
624 VBUSERR_RETRY_COUNT - musb->vbuserr_retry,
625 musb->port1_status);
626
627 /* go through A_WAIT_VFALL then start a new session */
628 if (!ignore)
629 musb_platform_set_vbus(musb, 0);
630 handled = IRQ_HANDLED;
631 }
632
633 #endif
634 if (int_usb & MUSB_INTR_SUSPEND) {
635 DBG(1, "SUSPEND (%s) devctl %02x power %02x\n",
636 otg_state_string(musb), devctl, power);
637 handled = IRQ_HANDLED;
638
639 switch (musb->xceiv->state) {
640 #ifdef CONFIG_USB_MUSB_OTG
641 case OTG_STATE_A_PERIPHERAL:
642 /* We also come here if the cable is removed, since
643 * this silicon doesn't report ID-no-longer-grounded.
644 *
645 * We depend on T(a_wait_bcon) to shut us down, and
646 * hope users don't do anything dicey during this
647 * undesired detour through A_WAIT_BCON.
648 */
649 musb_hnp_stop(musb);
650 usb_hcd_resume_root_hub(musb_to_hcd(musb));
651 musb_root_disconnect(musb);
652 musb_platform_try_idle(musb, jiffies
653 + msecs_to_jiffies(musb->a_wait_bcon
654 ? : OTG_TIME_A_WAIT_BCON));
655
656 break;
657 #endif
658 case OTG_STATE_B_IDLE:
659 if (!musb->is_active)
660 break;
661 case OTG_STATE_B_PERIPHERAL:
662 musb_g_suspend(musb);
663 musb->is_active = is_otg_enabled(musb)
664 && musb->xceiv->gadget->b_hnp_enable;
665 if (musb->is_active) {
666 #ifdef CONFIG_USB_MUSB_OTG
667 musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
668 DBG(1, "HNP: Setting timer for b_ase0_brst\n");
669 mod_timer(&musb->otg_timer, jiffies
670 + msecs_to_jiffies(
671 OTG_TIME_B_ASE0_BRST));
672 #endif
673 }
674 break;
675 case OTG_STATE_A_WAIT_BCON:
676 if (musb->a_wait_bcon != 0)
677 musb_platform_try_idle(musb, jiffies
678 + msecs_to_jiffies(musb->a_wait_bcon));
679 break;
680 case OTG_STATE_A_HOST:
681 musb->xceiv->state = OTG_STATE_A_SUSPEND;
682 musb->is_active = is_otg_enabled(musb)
683 && musb->xceiv->host->b_hnp_enable;
684 break;
685 case OTG_STATE_B_HOST:
686 /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
687 DBG(1, "REVISIT: SUSPEND as B_HOST\n");
688 break;
689 default:
690 /* "should not happen" */
691 musb->is_active = 0;
692 break;
693 }
694 }
695
696 #ifdef CONFIG_USB_MUSB_HDRC_HCD
697 if (int_usb & MUSB_INTR_CONNECT) {
698 struct usb_hcd *hcd = musb_to_hcd(musb);
699
700 handled = IRQ_HANDLED;
701 musb->is_active = 1;
702 set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
703
704 musb->ep0_stage = MUSB_EP0_START;
705
706 #ifdef CONFIG_USB_MUSB_OTG
707 /* flush endpoints when transitioning from Device Mode */
708 if (is_peripheral_active(musb)) {
709 /* REVISIT HNP; just force disconnect */
710 }
711 musb_writew(musb->mregs, MUSB_INTRTXE, musb->epmask);
712 musb_writew(musb->mregs, MUSB_INTRRXE, musb->epmask & 0xfffe);
713 musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7);
714 #endif
715 musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED
716 |USB_PORT_STAT_HIGH_SPEED
717 |USB_PORT_STAT_ENABLE
718 );
719 musb->port1_status |= USB_PORT_STAT_CONNECTION
720 |(USB_PORT_STAT_C_CONNECTION << 16);
721
722 /* high vs full speed is just a guess until after reset */
723 if (devctl & MUSB_DEVCTL_LSDEV)
724 musb->port1_status |= USB_PORT_STAT_LOW_SPEED;
725
726 /* indicate new connection to OTG machine */
727 switch (musb->xceiv->state) {
728 case OTG_STATE_B_PERIPHERAL:
729 if (int_usb & MUSB_INTR_SUSPEND) {
730 DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n");
731 int_usb &= ~MUSB_INTR_SUSPEND;
732 goto b_host;
733 } else
734 DBG(1, "CONNECT as b_peripheral???\n");
735 break;
736 case OTG_STATE_B_WAIT_ACON:
737 DBG(1, "HNP: CONNECT, now b_host\n");
738 b_host:
739 musb->xceiv->state = OTG_STATE_B_HOST;
740 hcd->self.is_b_host = 1;
741 musb->ignore_disconnect = 0;
742 del_timer(&musb->otg_timer);
743 break;
744 default:
745 if ((devctl & MUSB_DEVCTL_VBUS)
746 == (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
747 musb->xceiv->state = OTG_STATE_A_HOST;
748 hcd->self.is_b_host = 0;
749 }
750 break;
751 }
752
753 /* poke the root hub */
754 MUSB_HST_MODE(musb);
755 if (hcd->status_urb)
756 usb_hcd_poll_rh_status(hcd);
757 else
758 usb_hcd_resume_root_hub(hcd);
759
760 DBG(1, "CONNECT (%s) devctl %02x\n",
761 otg_state_string(musb), devctl);
762 }
763 #endif /* CONFIG_USB_MUSB_HDRC_HCD */
764
765 if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
766 DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n",
767 otg_state_string(musb),
768 MUSB_MODE(musb), devctl);
769 handled = IRQ_HANDLED;
770
771 switch (musb->xceiv->state) {
772 #ifdef CONFIG_USB_MUSB_HDRC_HCD
773 case OTG_STATE_A_HOST:
774 case OTG_STATE_A_SUSPEND:
775 usb_hcd_resume_root_hub(musb_to_hcd(musb));
776 musb_root_disconnect(musb);
777 if (musb->a_wait_bcon != 0 && is_otg_enabled(musb))
778 musb_platform_try_idle(musb, jiffies
779 + msecs_to_jiffies(musb->a_wait_bcon));
780 break;
781 #endif /* HOST */
782 #ifdef CONFIG_USB_MUSB_OTG
783 case OTG_STATE_B_HOST:
784 /* REVISIT this behaves for "real disconnect"
785 * cases; make sure the other transitions from
786 * from B_HOST act right too. The B_HOST code
787 * in hnp_stop() is currently not used...
788 */
789 musb_root_disconnect(musb);
790 musb_to_hcd(musb)->self.is_b_host = 0;
791 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
792 MUSB_DEV_MODE(musb);
793 musb_g_disconnect(musb);
794 break;
795 case OTG_STATE_A_PERIPHERAL:
796 musb_hnp_stop(musb);
797 musb_root_disconnect(musb);
798 /* FALLTHROUGH */
799 case OTG_STATE_B_WAIT_ACON:
800 /* FALLTHROUGH */
801 #endif /* OTG */
802 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
803 case OTG_STATE_B_PERIPHERAL:
804 case OTG_STATE_B_IDLE:
805 musb_g_disconnect(musb);
806 break;
807 #endif /* GADGET */
808 default:
809 WARNING("unhandled DISCONNECT transition (%s)\n",
810 otg_state_string(musb));
811 break;
812 }
813 }
814
815 /* mentor saves a bit: bus reset and babble share the same irq.
816 * only host sees babble; only peripheral sees bus reset.
817 */
818 if (int_usb & MUSB_INTR_RESET) {
819 handled = IRQ_HANDLED;
820 if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) {
821 /*
822 * Looks like non-HS BABBLE can be ignored, but
823 * HS BABBLE is an error condition. For HS the solution
824 * is to avoid babble in the first place and fix what
825 * caused BABBLE. When HS BABBLE happens we can only
826 * stop the session.
827 */
828 if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
829 DBG(1, "BABBLE devctl: %02x\n", devctl);
830 else {
831 ERR("Stopping host session -- babble\n");
832 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
833 }
834 } else if (is_peripheral_capable()) {
835 DBG(1, "BUS RESET as %s\n", otg_state_string(musb));
836 switch (musb->xceiv->state) {
837 #ifdef CONFIG_USB_OTG
838 case OTG_STATE_A_SUSPEND:
839 /* We need to ignore disconnect on suspend
840 * otherwise tusb 2.0 won't reconnect after a
841 * power cycle, which breaks otg compliance.
842 */
843 musb->ignore_disconnect = 1;
844 musb_g_reset(musb);
845 /* FALLTHROUGH */
846 case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */
847 /* never use invalid T(a_wait_bcon) */
848 DBG(1, "HNP: in %s, %d msec timeout\n",
849 otg_state_string(musb),
850 TA_WAIT_BCON(musb));
851 mod_timer(&musb->otg_timer, jiffies
852 + msecs_to_jiffies(TA_WAIT_BCON(musb)));
853 break;
854 case OTG_STATE_A_PERIPHERAL:
855 musb->ignore_disconnect = 0;
856 del_timer(&musb->otg_timer);
857 musb_g_reset(musb);
858 break;
859 case OTG_STATE_B_WAIT_ACON:
860 DBG(1, "HNP: RESET (%s), to b_peripheral\n",
861 otg_state_string(musb));
862 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
863 musb_g_reset(musb);
864 break;
865 #endif
866 case OTG_STATE_B_IDLE:
867 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
868 /* FALLTHROUGH */
869 case OTG_STATE_B_PERIPHERAL:
870 musb_g_reset(musb);
871 break;
872 default:
873 DBG(1, "Unhandled BUS RESET as %s\n",
874 otg_state_string(musb));
875 }
876 }
877 }
878
879 #if 0
880 /* REVISIT ... this would be for multiplexing periodic endpoints, or
881 * supporting transfer phasing to prevent exceeding ISO bandwidth
882 * limits of a given frame or microframe.
883 *
884 * It's not needed for peripheral side, which dedicates endpoints;
885 * though it _might_ use SOF irqs for other purposes.
886 *
887 * And it's not currently needed for host side, which also dedicates
888 * endpoints, relies on TX/RX interval registers, and isn't claimed
889 * to support ISO transfers yet.
890 */
891 if (int_usb & MUSB_INTR_SOF) {
892 void __iomem *mbase = musb->mregs;
893 struct musb_hw_ep *ep;
894 u8 epnum;
895 u16 frame;
896
897 DBG(6, "START_OF_FRAME\n");
898 handled = IRQ_HANDLED;
899
900 /* start any periodic Tx transfers waiting for current frame */
901 frame = musb_readw(mbase, MUSB_FRAME);
902 ep = musb->endpoints;
903 for (epnum = 1; (epnum < musb->nr_endpoints)
904 && (musb->epmask >= (1 << epnum));
905 epnum++, ep++) {
906 /*
907 * FIXME handle framecounter wraps (12 bits)
908 * eliminate duplicated StartUrb logic
909 */
910 if (ep->dwWaitFrame >= frame) {
911 ep->dwWaitFrame = 0;
912 pr_debug("SOF --> periodic TX%s on %d\n",
913 ep->tx_channel ? " DMA" : "",
914 epnum);
915 if (!ep->tx_channel)
916 musb_h_tx_start(musb, epnum);
917 else
918 cppi_hostdma_start(musb, epnum);
919 }
920 } /* end of for loop */
921 }
922 #endif
923
924 schedule_work(&musb->irq_work);
925
926 return handled;
927 }
928
929 /*-------------------------------------------------------------------------*/
930
931 /*
932 * Program the HDRC to start (enable interrupts, dma, etc.).
933 */
934 void musb_start(struct musb *musb)
935 {
936 void __iomem *regs = musb->mregs;
937 u8 devctl = musb_readb(regs, MUSB_DEVCTL);
938
939 DBG(2, "<== devctl %02x\n", devctl);
940
941 /* Set INT enable registers, enable interrupts */
942 musb_writew(regs, MUSB_INTRTXE, musb->epmask);
943 musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe);
944 musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
945
946 musb_writeb(regs, MUSB_TESTMODE, 0);
947
948 /* put into basic highspeed mode and start session */
949 musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
950 | MUSB_POWER_SOFTCONN
951 | MUSB_POWER_HSENAB
952 /* ENSUSPEND wedges tusb */
953 /* | MUSB_POWER_ENSUSPEND */
954 );
955
956 musb->is_active = 0;
957 devctl = musb_readb(regs, MUSB_DEVCTL);
958 devctl &= ~MUSB_DEVCTL_SESSION;
959
960 if (is_otg_enabled(musb)) {
961 /* session started after:
962 * (a) ID-grounded irq, host mode;
963 * (b) vbus present/connect IRQ, peripheral mode;
964 * (c) peripheral initiates, using SRP
965 */
966 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
967 musb->is_active = 1;
968 else
969 devctl |= MUSB_DEVCTL_SESSION;
970
971 } else if (is_host_enabled(musb)) {
972 /* assume ID pin is hard-wired to ground */
973 devctl |= MUSB_DEVCTL_SESSION;
974
975 } else /* peripheral is enabled */ {
976 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
977 musb->is_active = 1;
978 }
979 musb_platform_enable(musb);
980 musb_writeb(regs, MUSB_DEVCTL, devctl);
981 }
982
983
984 static void musb_generic_disable(struct musb *musb)
985 {
986 void __iomem *mbase = musb->mregs;
987 u16 temp;
988
989 /* disable interrupts */
990 musb_writeb(mbase, MUSB_INTRUSBE, 0);
991 musb_writew(mbase, MUSB_INTRTXE, 0);
992 musb_writew(mbase, MUSB_INTRRXE, 0);
993
994 /* off */
995 musb_writeb(mbase, MUSB_DEVCTL, 0);
996
997 /* flush pending interrupts */
998 temp = musb_readb(mbase, MUSB_INTRUSB);
999 temp = musb_readw(mbase, MUSB_INTRTX);
1000 temp = musb_readw(mbase, MUSB_INTRRX);
1001
1002 }
1003
1004 /*
1005 * Make the HDRC stop (disable interrupts, etc.);
1006 * reversible by musb_start
1007 * called on gadget driver unregister
1008 * with controller locked, irqs blocked
1009 * acts as a NOP unless some role activated the hardware
1010 */
1011 void musb_stop(struct musb *musb)
1012 {
1013 /* stop IRQs, timers, ... */
1014 musb_platform_disable(musb);
1015 musb_generic_disable(musb);
1016 DBG(3, "HDRC disabled\n");
1017
1018 /* FIXME
1019 * - mark host and/or peripheral drivers unusable/inactive
1020 * - disable DMA (and enable it in HdrcStart)
1021 * - make sure we can musb_start() after musb_stop(); with
1022 * OTG mode, gadget driver module rmmod/modprobe cycles that
1023 * - ...
1024 */
1025 musb_platform_try_idle(musb, 0);
1026 }
1027
1028 static void musb_shutdown(struct platform_device *pdev)
1029 {
1030 struct musb *musb = dev_to_musb(&pdev->dev);
1031 unsigned long flags;
1032
1033 pm_runtime_get_sync(musb->controller);
1034 spin_lock_irqsave(&musb->lock, flags);
1035 musb_platform_disable(musb);
1036 musb_generic_disable(musb);
1037 spin_unlock_irqrestore(&musb->lock, flags);
1038
1039 if (!is_otg_enabled(musb) && is_host_enabled(musb))
1040 usb_remove_hcd(musb_to_hcd(musb));
1041 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
1042 musb_platform_exit(musb);
1043
1044 pm_runtime_put(musb->controller);
1045 /* FIXME power down */
1046 }
1047
1048
1049 /*-------------------------------------------------------------------------*/
1050
1051 /*
1052 * The silicon either has hard-wired endpoint configurations, or else
1053 * "dynamic fifo" sizing. The driver has support for both, though at this
1054 * writing only the dynamic sizing is very well tested. Since we switched
1055 * away from compile-time hardware parameters, we can no longer rely on
1056 * dead code elimination to leave only the relevant one in the object file.
1057 *
1058 * We don't currently use dynamic fifo setup capability to do anything
1059 * more than selecting one of a bunch of predefined configurations.
1060 */
1061 #if defined(CONFIG_USB_MUSB_TUSB6010) || defined(CONFIG_USB_MUSB_OMAP2PLUS) \
1062 || defined(CONFIG_USB_MUSB_AM35X)
1063 static ushort __initdata fifo_mode = 4;
1064 #elif defined(CONFIG_USB_MUSB_UX500)
1065 static ushort __initdata fifo_mode = 5;
1066 #else
1067 static ushort __initdata fifo_mode = 2;
1068 #endif
1069
1070 /* "modprobe ... fifo_mode=1" etc */
1071 module_param(fifo_mode, ushort, 0);
1072 MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration");
1073
1074 /*
1075 * tables defining fifo_mode values. define more if you like.
1076 * for host side, make sure both halves of ep1 are set up.
1077 */
1078
1079 /* mode 0 - fits in 2KB */
1080 static struct musb_fifo_cfg __initdata mode_0_cfg[] = {
1081 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1082 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1083 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, },
1084 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1085 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1086 };
1087
1088 /* mode 1 - fits in 4KB */
1089 static struct musb_fifo_cfg __initdata mode_1_cfg[] = {
1090 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1091 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1092 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1093 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1094 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1095 };
1096
1097 /* mode 2 - fits in 4KB */
1098 static struct musb_fifo_cfg __initdata mode_2_cfg[] = {
1099 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1100 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1101 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1102 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1103 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1104 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1105 };
1106
1107 /* mode 3 - fits in 4KB */
1108 static struct musb_fifo_cfg __initdata mode_3_cfg[] = {
1109 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1110 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1111 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1112 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1113 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1114 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1115 };
1116
1117 /* mode 4 - fits in 16KB */
1118 static struct musb_fifo_cfg __initdata mode_4_cfg[] = {
1119 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1120 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1121 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1122 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1123 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1124 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1125 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1126 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1127 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1128 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1129 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, },
1130 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, },
1131 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
1132 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, },
1133 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, },
1134 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, },
1135 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, },
1136 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, },
1137 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, },
1138 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, },
1139 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, },
1140 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, },
1141 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, },
1142 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, },
1143 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
1144 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1145 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1146 };
1147
1148 /* mode 5 - fits in 8KB */
1149 static struct musb_fifo_cfg __initdata mode_5_cfg[] = {
1150 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1151 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1152 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1153 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1154 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1155 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1156 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1157 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1158 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1159 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1160 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 32, },
1161 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 32, },
1162 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 32, },
1163 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 32, },
1164 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 32, },
1165 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 32, },
1166 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 32, },
1167 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 32, },
1168 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 32, },
1169 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 32, },
1170 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 32, },
1171 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 32, },
1172 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 32, },
1173 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 32, },
1174 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, },
1175 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1176 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1177 };
1178
1179 /*
1180 * configure a fifo; for non-shared endpoints, this may be called
1181 * once for a tx fifo and once for an rx fifo.
1182 *
1183 * returns negative errno or offset for next fifo.
1184 */
1185 static int __init
1186 fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep,
1187 const struct musb_fifo_cfg *cfg, u16 offset)
1188 {
1189 void __iomem *mbase = musb->mregs;
1190 int size = 0;
1191 u16 maxpacket = cfg->maxpacket;
1192 u16 c_off = offset >> 3;
1193 u8 c_size;
1194
1195 /* expect hw_ep has already been zero-initialized */
1196
1197 size = ffs(max(maxpacket, (u16) 8)) - 1;
1198 maxpacket = 1 << size;
1199
1200 c_size = size - 3;
1201 if (cfg->mode == BUF_DOUBLE) {
1202 if ((offset + (maxpacket << 1)) >
1203 (1 << (musb->config->ram_bits + 2)))
1204 return -EMSGSIZE;
1205 c_size |= MUSB_FIFOSZ_DPB;
1206 } else {
1207 if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2)))
1208 return -EMSGSIZE;
1209 }
1210
1211 /* configure the FIFO */
1212 musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum);
1213
1214 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1215 /* EP0 reserved endpoint for control, bidirectional;
1216 * EP1 reserved for bulk, two unidirection halves.
1217 */
1218 if (hw_ep->epnum == 1)
1219 musb->bulk_ep = hw_ep;
1220 /* REVISIT error check: be sure ep0 can both rx and tx ... */
1221 #endif
1222 switch (cfg->style) {
1223 case FIFO_TX:
1224 musb_write_txfifosz(mbase, c_size);
1225 musb_write_txfifoadd(mbase, c_off);
1226 hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1227 hw_ep->max_packet_sz_tx = maxpacket;
1228 break;
1229 case FIFO_RX:
1230 musb_write_rxfifosz(mbase, c_size);
1231 musb_write_rxfifoadd(mbase, c_off);
1232 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1233 hw_ep->max_packet_sz_rx = maxpacket;
1234 break;
1235 case FIFO_RXTX:
1236 musb_write_txfifosz(mbase, c_size);
1237 musb_write_txfifoadd(mbase, c_off);
1238 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1239 hw_ep->max_packet_sz_rx = maxpacket;
1240
1241 musb_write_rxfifosz(mbase, c_size);
1242 musb_write_rxfifoadd(mbase, c_off);
1243 hw_ep->tx_double_buffered = hw_ep->rx_double_buffered;
1244 hw_ep->max_packet_sz_tx = maxpacket;
1245
1246 hw_ep->is_shared_fifo = true;
1247 break;
1248 }
1249
1250 /* NOTE rx and tx endpoint irqs aren't managed separately,
1251 * which happens to be ok
1252 */
1253 musb->epmask |= (1 << hw_ep->epnum);
1254
1255 return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0));
1256 }
1257
1258 static struct musb_fifo_cfg __initdata ep0_cfg = {
1259 .style = FIFO_RXTX, .maxpacket = 64,
1260 };
1261
1262 static int __init ep_config_from_table(struct musb *musb)
1263 {
1264 const struct musb_fifo_cfg *cfg;
1265 unsigned i, n;
1266 int offset;
1267 struct musb_hw_ep *hw_ep = musb->endpoints;
1268
1269 if (musb->config->fifo_cfg) {
1270 cfg = musb->config->fifo_cfg;
1271 n = musb->config->fifo_cfg_size;
1272 goto done;
1273 }
1274
1275 switch (fifo_mode) {
1276 default:
1277 fifo_mode = 0;
1278 /* FALLTHROUGH */
1279 case 0:
1280 cfg = mode_0_cfg;
1281 n = ARRAY_SIZE(mode_0_cfg);
1282 break;
1283 case 1:
1284 cfg = mode_1_cfg;
1285 n = ARRAY_SIZE(mode_1_cfg);
1286 break;
1287 case 2:
1288 cfg = mode_2_cfg;
1289 n = ARRAY_SIZE(mode_2_cfg);
1290 break;
1291 case 3:
1292 cfg = mode_3_cfg;
1293 n = ARRAY_SIZE(mode_3_cfg);
1294 break;
1295 case 4:
1296 cfg = mode_4_cfg;
1297 n = ARRAY_SIZE(mode_4_cfg);
1298 break;
1299 case 5:
1300 cfg = mode_5_cfg;
1301 n = ARRAY_SIZE(mode_5_cfg);
1302 break;
1303 }
1304
1305 printk(KERN_DEBUG "%s: setup fifo_mode %d\n",
1306 musb_driver_name, fifo_mode);
1307
1308
1309 done:
1310 offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0);
1311 /* assert(offset > 0) */
1312
1313 /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would
1314 * be better than static musb->config->num_eps and DYN_FIFO_SIZE...
1315 */
1316
1317 for (i = 0; i < n; i++) {
1318 u8 epn = cfg->hw_ep_num;
1319
1320 if (epn >= musb->config->num_eps) {
1321 pr_debug("%s: invalid ep %d\n",
1322 musb_driver_name, epn);
1323 return -EINVAL;
1324 }
1325 offset = fifo_setup(musb, hw_ep + epn, cfg++, offset);
1326 if (offset < 0) {
1327 pr_debug("%s: mem overrun, ep %d\n",
1328 musb_driver_name, epn);
1329 return -EINVAL;
1330 }
1331 epn++;
1332 musb->nr_endpoints = max(epn, musb->nr_endpoints);
1333 }
1334
1335 printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n",
1336 musb_driver_name,
1337 n + 1, musb->config->num_eps * 2 - 1,
1338 offset, (1 << (musb->config->ram_bits + 2)));
1339
1340 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1341 if (!musb->bulk_ep) {
1342 pr_debug("%s: missing bulk\n", musb_driver_name);
1343 return -EINVAL;
1344 }
1345 #endif
1346
1347 return 0;
1348 }
1349
1350
1351 /*
1352 * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false
1353 * @param musb the controller
1354 */
1355 static int __init ep_config_from_hw(struct musb *musb)
1356 {
1357 u8 epnum = 0;
1358 struct musb_hw_ep *hw_ep;
1359 void *mbase = musb->mregs;
1360 int ret = 0;
1361
1362 DBG(2, "<== static silicon ep config\n");
1363
1364 /* FIXME pick up ep0 maxpacket size */
1365
1366 for (epnum = 1; epnum < musb->config->num_eps; epnum++) {
1367 musb_ep_select(mbase, epnum);
1368 hw_ep = musb->endpoints + epnum;
1369
1370 ret = musb_read_fifosize(musb, hw_ep, epnum);
1371 if (ret < 0)
1372 break;
1373
1374 /* FIXME set up hw_ep->{rx,tx}_double_buffered */
1375
1376 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1377 /* pick an RX/TX endpoint for bulk */
1378 if (hw_ep->max_packet_sz_tx < 512
1379 || hw_ep->max_packet_sz_rx < 512)
1380 continue;
1381
1382 /* REVISIT: this algorithm is lazy, we should at least
1383 * try to pick a double buffered endpoint.
1384 */
1385 if (musb->bulk_ep)
1386 continue;
1387 musb->bulk_ep = hw_ep;
1388 #endif
1389 }
1390
1391 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1392 if (!musb->bulk_ep) {
1393 pr_debug("%s: missing bulk\n", musb_driver_name);
1394 return -EINVAL;
1395 }
1396 #endif
1397
1398 return 0;
1399 }
1400
1401 enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, };
1402
1403 /* Initialize MUSB (M)HDRC part of the USB hardware subsystem;
1404 * configure endpoints, or take their config from silicon
1405 */
1406 static int __init musb_core_init(u16 musb_type, struct musb *musb)
1407 {
1408 u8 reg;
1409 char *type;
1410 char aInfo[90], aRevision[32], aDate[12];
1411 void __iomem *mbase = musb->mregs;
1412 int status = 0;
1413 int i;
1414
1415 /* log core options (read using indexed model) */
1416 reg = musb_read_configdata(mbase);
1417
1418 strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8");
1419 if (reg & MUSB_CONFIGDATA_DYNFIFO) {
1420 strcat(aInfo, ", dyn FIFOs");
1421 musb->dyn_fifo = true;
1422 }
1423 if (reg & MUSB_CONFIGDATA_MPRXE) {
1424 strcat(aInfo, ", bulk combine");
1425 musb->bulk_combine = true;
1426 }
1427 if (reg & MUSB_CONFIGDATA_MPTXE) {
1428 strcat(aInfo, ", bulk split");
1429 musb->bulk_split = true;
1430 }
1431 if (reg & MUSB_CONFIGDATA_HBRXE) {
1432 strcat(aInfo, ", HB-ISO Rx");
1433 musb->hb_iso_rx = true;
1434 }
1435 if (reg & MUSB_CONFIGDATA_HBTXE) {
1436 strcat(aInfo, ", HB-ISO Tx");
1437 musb->hb_iso_tx = true;
1438 }
1439 if (reg & MUSB_CONFIGDATA_SOFTCONE)
1440 strcat(aInfo, ", SoftConn");
1441
1442 printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n",
1443 musb_driver_name, reg, aInfo);
1444
1445 aDate[0] = 0;
1446 if (MUSB_CONTROLLER_MHDRC == musb_type) {
1447 musb->is_multipoint = 1;
1448 type = "M";
1449 } else {
1450 musb->is_multipoint = 0;
1451 type = "";
1452 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1453 #ifndef CONFIG_USB_OTG_BLACKLIST_HUB
1454 printk(KERN_ERR
1455 "%s: kernel must blacklist external hubs\n",
1456 musb_driver_name);
1457 #endif
1458 #endif
1459 }
1460
1461 /* log release info */
1462 musb->hwvers = musb_read_hwvers(mbase);
1463 snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers),
1464 MUSB_HWVERS_MINOR(musb->hwvers),
1465 (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : "");
1466 printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n",
1467 musb_driver_name, type, aRevision, aDate);
1468
1469 /* configure ep0 */
1470 musb_configure_ep0(musb);
1471
1472 /* discover endpoint configuration */
1473 musb->nr_endpoints = 1;
1474 musb->epmask = 1;
1475
1476 if (musb->dyn_fifo)
1477 status = ep_config_from_table(musb);
1478 else
1479 status = ep_config_from_hw(musb);
1480
1481 if (status < 0)
1482 return status;
1483
1484 /* finish init, and print endpoint config */
1485 for (i = 0; i < musb->nr_endpoints; i++) {
1486 struct musb_hw_ep *hw_ep = musb->endpoints + i;
1487
1488 hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase;
1489 #ifdef CONFIG_USB_MUSB_TUSB6010
1490 hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i);
1491 hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i);
1492 hw_ep->fifo_sync_va =
1493 musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i);
1494
1495 if (i == 0)
1496 hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF;
1497 else
1498 hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2);
1499 #endif
1500
1501 hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase;
1502 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1503 hw_ep->target_regs = musb_read_target_reg_base(i, mbase);
1504 hw_ep->rx_reinit = 1;
1505 hw_ep->tx_reinit = 1;
1506 #endif
1507
1508 if (hw_ep->max_packet_sz_tx) {
1509 DBG(1,
1510 "%s: hw_ep %d%s, %smax %d\n",
1511 musb_driver_name, i,
1512 hw_ep->is_shared_fifo ? "shared" : "tx",
1513 hw_ep->tx_double_buffered
1514 ? "doublebuffer, " : "",
1515 hw_ep->max_packet_sz_tx);
1516 }
1517 if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
1518 DBG(1,
1519 "%s: hw_ep %d%s, %smax %d\n",
1520 musb_driver_name, i,
1521 "rx",
1522 hw_ep->rx_double_buffered
1523 ? "doublebuffer, " : "",
1524 hw_ep->max_packet_sz_rx);
1525 }
1526 if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
1527 DBG(1, "hw_ep %d not configured\n", i);
1528 }
1529
1530 return 0;
1531 }
1532
1533 /*-------------------------------------------------------------------------*/
1534
1535 #if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_SOC_OMAP3430) || \
1536 defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_ARCH_U8500) || \
1537 defined(CONFIG_ARCH_U5500)
1538
1539 static irqreturn_t generic_interrupt(int irq, void *__hci)
1540 {
1541 unsigned long flags;
1542 irqreturn_t retval = IRQ_NONE;
1543 struct musb *musb = __hci;
1544
1545 spin_lock_irqsave(&musb->lock, flags);
1546
1547 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
1548 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
1549 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
1550
1551 if (musb->int_usb || musb->int_tx || musb->int_rx)
1552 retval = musb_interrupt(musb);
1553
1554 spin_unlock_irqrestore(&musb->lock, flags);
1555
1556 return retval;
1557 }
1558
1559 #else
1560 #define generic_interrupt NULL
1561 #endif
1562
1563 /*
1564 * handle all the irqs defined by the HDRC core. for now we expect: other
1565 * irq sources (phy, dma, etc) will be handled first, musb->int_* values
1566 * will be assigned, and the irq will already have been acked.
1567 *
1568 * called in irq context with spinlock held, irqs blocked
1569 */
1570 irqreturn_t musb_interrupt(struct musb *musb)
1571 {
1572 irqreturn_t retval = IRQ_NONE;
1573 u8 devctl, power;
1574 int ep_num;
1575 u32 reg;
1576
1577 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1578 power = musb_readb(musb->mregs, MUSB_POWER);
1579
1580 DBG(4, "** IRQ %s usb%04x tx%04x rx%04x\n",
1581 (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
1582 musb->int_usb, musb->int_tx, musb->int_rx);
1583
1584 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1585 if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
1586 if (!musb->gadget_driver) {
1587 DBG(5, "No gadget driver loaded\n");
1588 return IRQ_HANDLED;
1589 }
1590 #endif
1591
1592 /* the core can interrupt us for multiple reasons; docs have
1593 * a generic interrupt flowchart to follow
1594 */
1595 if (musb->int_usb)
1596 retval |= musb_stage0_irq(musb, musb->int_usb,
1597 devctl, power);
1598
1599 /* "stage 1" is handling endpoint irqs */
1600
1601 /* handle endpoint 0 first */
1602 if (musb->int_tx & 1) {
1603 if (devctl & MUSB_DEVCTL_HM)
1604 retval |= musb_h_ep0_irq(musb);
1605 else
1606 retval |= musb_g_ep0_irq(musb);
1607 }
1608
1609 /* RX on endpoints 1-15 */
1610 reg = musb->int_rx >> 1;
1611 ep_num = 1;
1612 while (reg) {
1613 if (reg & 1) {
1614 /* musb_ep_select(musb->mregs, ep_num); */
1615 /* REVISIT just retval = ep->rx_irq(...) */
1616 retval = IRQ_HANDLED;
1617 if (devctl & MUSB_DEVCTL_HM) {
1618 if (is_host_capable())
1619 musb_host_rx(musb, ep_num);
1620 } else {
1621 if (is_peripheral_capable())
1622 musb_g_rx(musb, ep_num);
1623 }
1624 }
1625
1626 reg >>= 1;
1627 ep_num++;
1628 }
1629
1630 /* TX on endpoints 1-15 */
1631 reg = musb->int_tx >> 1;
1632 ep_num = 1;
1633 while (reg) {
1634 if (reg & 1) {
1635 /* musb_ep_select(musb->mregs, ep_num); */
1636 /* REVISIT just retval |= ep->tx_irq(...) */
1637 retval = IRQ_HANDLED;
1638 if (devctl & MUSB_DEVCTL_HM) {
1639 if (is_host_capable())
1640 musb_host_tx(musb, ep_num);
1641 } else {
1642 if (is_peripheral_capable())
1643 musb_g_tx(musb, ep_num);
1644 }
1645 }
1646 reg >>= 1;
1647 ep_num++;
1648 }
1649
1650 return retval;
1651 }
1652
1653
1654 #ifndef CONFIG_MUSB_PIO_ONLY
1655 static int __initdata use_dma = 1;
1656
1657 /* "modprobe ... use_dma=0" etc */
1658 module_param(use_dma, bool, 0);
1659 MODULE_PARM_DESC(use_dma, "enable/disable use of DMA");
1660
1661 void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
1662 {
1663 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1664
1665 /* called with controller lock already held */
1666
1667 if (!epnum) {
1668 #ifndef CONFIG_USB_TUSB_OMAP_DMA
1669 if (!is_cppi_enabled()) {
1670 /* endpoint 0 */
1671 if (devctl & MUSB_DEVCTL_HM)
1672 musb_h_ep0_irq(musb);
1673 else
1674 musb_g_ep0_irq(musb);
1675 }
1676 #endif
1677 } else {
1678 /* endpoints 1..15 */
1679 if (transmit) {
1680 if (devctl & MUSB_DEVCTL_HM) {
1681 if (is_host_capable())
1682 musb_host_tx(musb, epnum);
1683 } else {
1684 if (is_peripheral_capable())
1685 musb_g_tx(musb, epnum);
1686 }
1687 } else {
1688 /* receive */
1689 if (devctl & MUSB_DEVCTL_HM) {
1690 if (is_host_capable())
1691 musb_host_rx(musb, epnum);
1692 } else {
1693 if (is_peripheral_capable())
1694 musb_g_rx(musb, epnum);
1695 }
1696 }
1697 }
1698 }
1699
1700 #else
1701 #define use_dma 0
1702 #endif
1703
1704 /*-------------------------------------------------------------------------*/
1705
1706 #ifdef CONFIG_SYSFS
1707
1708 static ssize_t
1709 musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1710 {
1711 struct musb *musb = dev_to_musb(dev);
1712 unsigned long flags;
1713 int ret = -EINVAL;
1714
1715 spin_lock_irqsave(&musb->lock, flags);
1716 ret = sprintf(buf, "%s\n", otg_state_string(musb));
1717 spin_unlock_irqrestore(&musb->lock, flags);
1718
1719 return ret;
1720 }
1721
1722 static ssize_t
1723 musb_mode_store(struct device *dev, struct device_attribute *attr,
1724 const char *buf, size_t n)
1725 {
1726 struct musb *musb = dev_to_musb(dev);
1727 unsigned long flags;
1728 int status;
1729
1730 spin_lock_irqsave(&musb->lock, flags);
1731 if (sysfs_streq(buf, "host"))
1732 status = musb_platform_set_mode(musb, MUSB_HOST);
1733 else if (sysfs_streq(buf, "peripheral"))
1734 status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
1735 else if (sysfs_streq(buf, "otg"))
1736 status = musb_platform_set_mode(musb, MUSB_OTG);
1737 else
1738 status = -EINVAL;
1739 spin_unlock_irqrestore(&musb->lock, flags);
1740
1741 return (status == 0) ? n : status;
1742 }
1743 static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store);
1744
1745 static ssize_t
1746 musb_vbus_store(struct device *dev, struct device_attribute *attr,
1747 const char *buf, size_t n)
1748 {
1749 struct musb *musb = dev_to_musb(dev);
1750 unsigned long flags;
1751 unsigned long val;
1752
1753 if (sscanf(buf, "%lu", &val) < 1) {
1754 dev_err(dev, "Invalid VBUS timeout ms value\n");
1755 return -EINVAL;
1756 }
1757
1758 spin_lock_irqsave(&musb->lock, flags);
1759 /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
1760 musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
1761 if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON)
1762 musb->is_active = 0;
1763 musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
1764 spin_unlock_irqrestore(&musb->lock, flags);
1765
1766 return n;
1767 }
1768
1769 static ssize_t
1770 musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
1771 {
1772 struct musb *musb = dev_to_musb(dev);
1773 unsigned long flags;
1774 unsigned long val;
1775 int vbus;
1776
1777 spin_lock_irqsave(&musb->lock, flags);
1778 val = musb->a_wait_bcon;
1779 /* FIXME get_vbus_status() is normally #defined as false...
1780 * and is effectively TUSB-specific.
1781 */
1782 vbus = musb_platform_get_vbus_status(musb);
1783 spin_unlock_irqrestore(&musb->lock, flags);
1784
1785 return sprintf(buf, "Vbus %s, timeout %lu msec\n",
1786 vbus ? "on" : "off", val);
1787 }
1788 static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);
1789
1790 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1791
1792 /* Gadget drivers can't know that a host is connected so they might want
1793 * to start SRP, but users can. This allows userspace to trigger SRP.
1794 */
1795 static ssize_t
1796 musb_srp_store(struct device *dev, struct device_attribute *attr,
1797 const char *buf, size_t n)
1798 {
1799 struct musb *musb = dev_to_musb(dev);
1800 unsigned short srp;
1801
1802 if (sscanf(buf, "%hu", &srp) != 1
1803 || (srp != 1)) {
1804 dev_err(dev, "SRP: Value must be 1\n");
1805 return -EINVAL;
1806 }
1807
1808 if (srp == 1)
1809 musb_g_wakeup(musb);
1810
1811 return n;
1812 }
1813 static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store);
1814
1815 #endif /* CONFIG_USB_GADGET_MUSB_HDRC */
1816
1817 static struct attribute *musb_attributes[] = {
1818 &dev_attr_mode.attr,
1819 &dev_attr_vbus.attr,
1820 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1821 &dev_attr_srp.attr,
1822 #endif
1823 NULL
1824 };
1825
1826 static const struct attribute_group musb_attr_group = {
1827 .attrs = musb_attributes,
1828 };
1829
1830 #endif /* sysfs */
1831
1832 /* Only used to provide driver mode change events */
1833 static void musb_irq_work(struct work_struct *data)
1834 {
1835 struct musb *musb = container_of(data, struct musb, irq_work);
1836 static int old_state;
1837
1838 if (musb->xceiv->state != old_state) {
1839 old_state = musb->xceiv->state;
1840 sysfs_notify(&musb->controller->kobj, NULL, "mode");
1841 }
1842 }
1843
1844 /* --------------------------------------------------------------------------
1845 * Init support
1846 */
1847
1848 static struct musb *__init
1849 allocate_instance(struct device *dev,
1850 struct musb_hdrc_config *config, void __iomem *mbase)
1851 {
1852 struct musb *musb;
1853 struct musb_hw_ep *ep;
1854 int epnum;
1855 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1856 struct usb_hcd *hcd;
1857
1858 hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev));
1859 if (!hcd)
1860 return NULL;
1861 /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */
1862
1863 musb = hcd_to_musb(hcd);
1864 INIT_LIST_HEAD(&musb->control);
1865 INIT_LIST_HEAD(&musb->in_bulk);
1866 INIT_LIST_HEAD(&musb->out_bulk);
1867
1868 hcd->uses_new_polling = 1;
1869 hcd->has_tt = 1;
1870
1871 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
1872 musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
1873 #else
1874 musb = kzalloc(sizeof *musb, GFP_KERNEL);
1875 if (!musb)
1876 return NULL;
1877
1878 #endif
1879 dev_set_drvdata(dev, musb);
1880 musb->mregs = mbase;
1881 musb->ctrl_base = mbase;
1882 musb->nIrq = -ENODEV;
1883 musb->config = config;
1884 BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
1885 for (epnum = 0, ep = musb->endpoints;
1886 epnum < musb->config->num_eps;
1887 epnum++, ep++) {
1888 ep->musb = musb;
1889 ep->epnum = epnum;
1890 }
1891
1892 musb->controller = dev;
1893
1894 return musb;
1895 }
1896
1897 static void musb_free(struct musb *musb)
1898 {
1899 /* this has multiple entry modes. it handles fault cleanup after
1900 * probe(), where things may be partially set up, as well as rmmod
1901 * cleanup after everything's been de-activated.
1902 */
1903
1904 #ifdef CONFIG_SYSFS
1905 sysfs_remove_group(&musb->controller->kobj, &musb_attr_group);
1906 #endif
1907
1908 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1909 musb_gadget_cleanup(musb);
1910 #endif
1911
1912 if (musb->nIrq >= 0) {
1913 if (musb->irq_wake)
1914 disable_irq_wake(musb->nIrq);
1915 free_irq(musb->nIrq, musb);
1916 }
1917 if (is_dma_capable() && musb->dma_controller) {
1918 struct dma_controller *c = musb->dma_controller;
1919
1920 (void) c->stop(c);
1921 dma_controller_destroy(c);
1922 }
1923
1924 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1925 usb_put_hcd(musb_to_hcd(musb));
1926 #else
1927 kfree(musb);
1928 #endif
1929 }
1930
1931 /*
1932 * Perform generic per-controller initialization.
1933 *
1934 * @pDevice: the controller (already clocked, etc)
1935 * @nIrq: irq
1936 * @mregs: virtual address of controller registers,
1937 * not yet corrected for platform-specific offsets
1938 */
1939 static int __init
1940 musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
1941 {
1942 int status;
1943 struct musb *musb;
1944 struct musb_hdrc_platform_data *plat = dev->platform_data;
1945
1946 /* The driver might handle more features than the board; OK.
1947 * Fail when the board needs a feature that's not enabled.
1948 */
1949 if (!plat) {
1950 dev_dbg(dev, "no platform_data?\n");
1951 status = -ENODEV;
1952 goto fail0;
1953 }
1954
1955 /* allocate */
1956 musb = allocate_instance(dev, plat->config, ctrl);
1957 if (!musb) {
1958 status = -ENOMEM;
1959 goto fail0;
1960 }
1961
1962 pm_runtime_use_autosuspend(musb->controller);
1963 pm_runtime_set_autosuspend_delay(musb->controller, 200);
1964 pm_runtime_enable(musb->controller);
1965
1966 spin_lock_init(&musb->lock);
1967 musb->board_mode = plat->mode;
1968 musb->board_set_power = plat->set_power;
1969 musb->min_power = plat->min_power;
1970 musb->ops = plat->platform_ops;
1971
1972 /* The musb_platform_init() call:
1973 * - adjusts musb->mregs and musb->isr if needed,
1974 * - may initialize an integrated tranceiver
1975 * - initializes musb->xceiv, usually by otg_get_transceiver()
1976 * - stops powering VBUS
1977 *
1978 * There are various transciever configurations. Blackfin,
1979 * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses
1980 * external/discrete ones in various flavors (twl4030 family,
1981 * isp1504, non-OTG, etc) mostly hooking up through ULPI.
1982 */
1983 musb->isr = generic_interrupt;
1984 status = musb_platform_init(musb);
1985 if (status < 0)
1986 goto fail1;
1987
1988 if (!musb->isr) {
1989 status = -ENODEV;
1990 goto fail3;
1991 }
1992
1993 if (!musb->xceiv->io_ops) {
1994 musb->xceiv->io_priv = musb->mregs;
1995 musb->xceiv->io_ops = &musb_ulpi_access;
1996 }
1997
1998 #ifndef CONFIG_MUSB_PIO_ONLY
1999 if (use_dma && dev->dma_mask) {
2000 struct dma_controller *c;
2001
2002 c = dma_controller_create(musb, musb->mregs);
2003 musb->dma_controller = c;
2004 if (c)
2005 (void) c->start(c);
2006 }
2007 #endif
2008 /* ideally this would be abstracted in platform setup */
2009 if (!is_dma_capable() || !musb->dma_controller)
2010 dev->dma_mask = NULL;
2011
2012 /* be sure interrupts are disabled before connecting ISR */
2013 musb_platform_disable(musb);
2014 musb_generic_disable(musb);
2015
2016 /* setup musb parts of the core (especially endpoints) */
2017 status = musb_core_init(plat->config->multipoint
2018 ? MUSB_CONTROLLER_MHDRC
2019 : MUSB_CONTROLLER_HDRC, musb);
2020 if (status < 0)
2021 goto fail3;
2022
2023 #ifdef CONFIG_USB_MUSB_OTG
2024 setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb);
2025 #endif
2026
2027 /* Init IRQ workqueue before request_irq */
2028 INIT_WORK(&musb->irq_work, musb_irq_work);
2029
2030 /* attach to the IRQ */
2031 if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) {
2032 dev_err(dev, "request_irq %d failed!\n", nIrq);
2033 status = -ENODEV;
2034 goto fail3;
2035 }
2036 musb->nIrq = nIrq;
2037 /* FIXME this handles wakeup irqs wrong */
2038 if (enable_irq_wake(nIrq) == 0) {
2039 musb->irq_wake = 1;
2040 device_init_wakeup(dev, 1);
2041 } else {
2042 musb->irq_wake = 0;
2043 }
2044
2045 /* host side needs more setup */
2046 if (is_host_enabled(musb)) {
2047 struct usb_hcd *hcd = musb_to_hcd(musb);
2048
2049 otg_set_host(musb->xceiv, &hcd->self);
2050
2051 if (is_otg_enabled(musb))
2052 hcd->self.otg_port = 1;
2053 musb->xceiv->host = &hcd->self;
2054 hcd->power_budget = 2 * (plat->power ? : 250);
2055
2056 /* program PHY to use external vBus if required */
2057 if (plat->extvbus) {
2058 u8 busctl = musb_read_ulpi_buscontrol(musb->mregs);
2059 busctl |= MUSB_ULPI_USE_EXTVBUS;
2060 musb_write_ulpi_buscontrol(musb->mregs, busctl);
2061 }
2062 }
2063
2064 /* For the host-only role, we can activate right away.
2065 * (We expect the ID pin to be forcibly grounded!!)
2066 * Otherwise, wait till the gadget driver hooks up.
2067 */
2068 if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
2069 struct usb_hcd *hcd = musb_to_hcd(musb);
2070
2071 MUSB_HST_MODE(musb);
2072 musb->xceiv->default_a = 1;
2073 musb->xceiv->state = OTG_STATE_A_IDLE;
2074
2075 status = usb_add_hcd(musb_to_hcd(musb), -1, 0);
2076
2077 hcd->self.uses_pio_for_control = 1;
2078 DBG(1, "%s mode, status %d, devctl %02x %c\n",
2079 "HOST", status,
2080 musb_readb(musb->mregs, MUSB_DEVCTL),
2081 (musb_readb(musb->mregs, MUSB_DEVCTL)
2082 & MUSB_DEVCTL_BDEVICE
2083 ? 'B' : 'A'));
2084
2085 } else /* peripheral is enabled */ {
2086 MUSB_DEV_MODE(musb);
2087 musb->xceiv->default_a = 0;
2088 musb->xceiv->state = OTG_STATE_B_IDLE;
2089
2090 status = musb_gadget_setup(musb);
2091
2092 DBG(1, "%s mode, status %d, dev%02x\n",
2093 is_otg_enabled(musb) ? "OTG" : "PERIPHERAL",
2094 status,
2095 musb_readb(musb->mregs, MUSB_DEVCTL));
2096
2097 }
2098 if (status < 0)
2099 goto fail3;
2100
2101 pm_runtime_put(musb->controller);
2102
2103 status = musb_init_debugfs(musb);
2104 if (status < 0)
2105 goto fail4;
2106
2107 #ifdef CONFIG_SYSFS
2108 status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
2109 if (status)
2110 goto fail5;
2111 #endif
2112
2113 dev_info(dev, "USB %s mode controller at %p using %s, IRQ %d\n",
2114 ({char *s;
2115 switch (musb->board_mode) {
2116 case MUSB_HOST: s = "Host"; break;
2117 case MUSB_PERIPHERAL: s = "Peripheral"; break;
2118 default: s = "OTG"; break;
2119 }; s; }),
2120 ctrl,
2121 (is_dma_capable() && musb->dma_controller)
2122 ? "DMA" : "PIO",
2123 musb->nIrq);
2124
2125 return 0;
2126
2127 fail5:
2128 musb_exit_debugfs(musb);
2129
2130 fail4:
2131 if (!is_otg_enabled(musb) && is_host_enabled(musb))
2132 usb_remove_hcd(musb_to_hcd(musb));
2133 else
2134 musb_gadget_cleanup(musb);
2135
2136 fail3:
2137 if (musb->irq_wake)
2138 device_init_wakeup(dev, 0);
2139 musb_platform_exit(musb);
2140
2141 fail1:
2142 dev_err(musb->controller,
2143 "musb_init_controller failed with status %d\n", status);
2144
2145 musb_free(musb);
2146
2147 fail0:
2148
2149 return status;
2150
2151 }
2152
2153 /*-------------------------------------------------------------------------*/
2154
2155 /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just
2156 * bridge to a platform device; this driver then suffices.
2157 */
2158
2159 #ifndef CONFIG_MUSB_PIO_ONLY
2160 static u64 *orig_dma_mask;
2161 #endif
2162
2163 static int __init musb_probe(struct platform_device *pdev)
2164 {
2165 struct device *dev = &pdev->dev;
2166 int irq = platform_get_irq_byname(pdev, "mc");
2167 int status;
2168 struct resource *iomem;
2169 void __iomem *base;
2170
2171 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2172 if (!iomem || irq <= 0)
2173 return -ENODEV;
2174
2175 base = ioremap(iomem->start, resource_size(iomem));
2176 if (!base) {
2177 dev_err(dev, "ioremap failed\n");
2178 return -ENOMEM;
2179 }
2180
2181 #ifndef CONFIG_MUSB_PIO_ONLY
2182 /* clobbered by use_dma=n */
2183 orig_dma_mask = dev->dma_mask;
2184 #endif
2185 status = musb_init_controller(dev, irq, base);
2186 if (status < 0)
2187 iounmap(base);
2188
2189 return status;
2190 }
2191
2192 static int __exit musb_remove(struct platform_device *pdev)
2193 {
2194 struct musb *musb = dev_to_musb(&pdev->dev);
2195 void __iomem *ctrl_base = musb->ctrl_base;
2196
2197 /* this gets called on rmmod.
2198 * - Host mode: host may still be active
2199 * - Peripheral mode: peripheral is deactivated (or never-activated)
2200 * - OTG mode: both roles are deactivated (or never-activated)
2201 */
2202 pm_runtime_get_sync(musb->controller);
2203 musb_exit_debugfs(musb);
2204 musb_shutdown(pdev);
2205
2206 pm_runtime_put(musb->controller);
2207 musb_free(musb);
2208 iounmap(ctrl_base);
2209 device_init_wakeup(&pdev->dev, 0);
2210 #ifndef CONFIG_MUSB_PIO_ONLY
2211 pdev->dev.dma_mask = orig_dma_mask;
2212 #endif
2213 return 0;
2214 }
2215
2216 #ifdef CONFIG_PM
2217
2218 static void musb_save_context(struct musb *musb)
2219 {
2220 int i;
2221 void __iomem *musb_base = musb->mregs;
2222 void __iomem *epio;
2223
2224 if (is_host_enabled(musb)) {
2225 musb->context.frame = musb_readw(musb_base, MUSB_FRAME);
2226 musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE);
2227 musb->context.busctl = musb_read_ulpi_buscontrol(musb->mregs);
2228 }
2229 musb->context.power = musb_readb(musb_base, MUSB_POWER);
2230 musb->context.intrtxe = musb_readw(musb_base, MUSB_INTRTXE);
2231 musb->context.intrrxe = musb_readw(musb_base, MUSB_INTRRXE);
2232 musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE);
2233 musb->context.index = musb_readb(musb_base, MUSB_INDEX);
2234 musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL);
2235
2236 for (i = 0; i < musb->config->num_eps; ++i) {
2237 epio = musb->endpoints[i].regs;
2238 musb->context.index_regs[i].txmaxp =
2239 musb_readw(epio, MUSB_TXMAXP);
2240 musb->context.index_regs[i].txcsr =
2241 musb_readw(epio, MUSB_TXCSR);
2242 musb->context.index_regs[i].rxmaxp =
2243 musb_readw(epio, MUSB_RXMAXP);
2244 musb->context.index_regs[i].rxcsr =
2245 musb_readw(epio, MUSB_RXCSR);
2246
2247 if (musb->dyn_fifo) {
2248 musb->context.index_regs[i].txfifoadd =
2249 musb_read_txfifoadd(musb_base);
2250 musb->context.index_regs[i].rxfifoadd =
2251 musb_read_rxfifoadd(musb_base);
2252 musb->context.index_regs[i].txfifosz =
2253 musb_read_txfifosz(musb_base);
2254 musb->context.index_regs[i].rxfifosz =
2255 musb_read_rxfifosz(musb_base);
2256 }
2257 if (is_host_enabled(musb)) {
2258 musb->context.index_regs[i].txtype =
2259 musb_readb(epio, MUSB_TXTYPE);
2260 musb->context.index_regs[i].txinterval =
2261 musb_readb(epio, MUSB_TXINTERVAL);
2262 musb->context.index_regs[i].rxtype =
2263 musb_readb(epio, MUSB_RXTYPE);
2264 musb->context.index_regs[i].rxinterval =
2265 musb_readb(epio, MUSB_RXINTERVAL);
2266
2267 musb->context.index_regs[i].txfunaddr =
2268 musb_read_txfunaddr(musb_base, i);
2269 musb->context.index_regs[i].txhubaddr =
2270 musb_read_txhubaddr(musb_base, i);
2271 musb->context.index_regs[i].txhubport =
2272 musb_read_txhubport(musb_base, i);
2273
2274 musb->context.index_regs[i].rxfunaddr =
2275 musb_read_rxfunaddr(musb_base, i);
2276 musb->context.index_regs[i].rxhubaddr =
2277 musb_read_rxhubaddr(musb_base, i);
2278 musb->context.index_regs[i].rxhubport =
2279 musb_read_rxhubport(musb_base, i);
2280 }
2281 }
2282 }
2283
2284 static void musb_restore_context(struct musb *musb)
2285 {
2286 int i;
2287 void __iomem *musb_base = musb->mregs;
2288 void __iomem *ep_target_regs;
2289 void __iomem *epio;
2290
2291 if (is_host_enabled(musb)) {
2292 musb_writew(musb_base, MUSB_FRAME, musb->context.frame);
2293 musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode);
2294 musb_write_ulpi_buscontrol(musb->mregs, musb->context.busctl);
2295 }
2296 musb_writeb(musb_base, MUSB_POWER, musb->context.power);
2297 musb_writew(musb_base, MUSB_INTRTXE, musb->context.intrtxe);
2298 musb_writew(musb_base, MUSB_INTRRXE, musb->context.intrrxe);
2299 musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe);
2300 musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl);
2301
2302 for (i = 0; i < musb->config->num_eps; ++i) {
2303 epio = musb->endpoints[i].regs;
2304 musb_writew(epio, MUSB_TXMAXP,
2305 musb->context.index_regs[i].txmaxp);
2306 musb_writew(epio, MUSB_TXCSR,
2307 musb->context.index_regs[i].txcsr);
2308 musb_writew(epio, MUSB_RXMAXP,
2309 musb->context.index_regs[i].rxmaxp);
2310 musb_writew(epio, MUSB_RXCSR,
2311 musb->context.index_regs[i].rxcsr);
2312
2313 if (musb->dyn_fifo) {
2314 musb_write_txfifosz(musb_base,
2315 musb->context.index_regs[i].txfifosz);
2316 musb_write_rxfifosz(musb_base,
2317 musb->context.index_regs[i].rxfifosz);
2318 musb_write_txfifoadd(musb_base,
2319 musb->context.index_regs[i].txfifoadd);
2320 musb_write_rxfifoadd(musb_base,
2321 musb->context.index_regs[i].rxfifoadd);
2322 }
2323
2324 if (is_host_enabled(musb)) {
2325 musb_writeb(epio, MUSB_TXTYPE,
2326 musb->context.index_regs[i].txtype);
2327 musb_writeb(epio, MUSB_TXINTERVAL,
2328 musb->context.index_regs[i].txinterval);
2329 musb_writeb(epio, MUSB_RXTYPE,
2330 musb->context.index_regs[i].rxtype);
2331 musb_writeb(epio, MUSB_RXINTERVAL,
2332
2333 musb->context.index_regs[i].rxinterval);
2334 musb_write_txfunaddr(musb_base, i,
2335 musb->context.index_regs[i].txfunaddr);
2336 musb_write_txhubaddr(musb_base, i,
2337 musb->context.index_regs[i].txhubaddr);
2338 musb_write_txhubport(musb_base, i,
2339 musb->context.index_regs[i].txhubport);
2340
2341 ep_target_regs =
2342 musb_read_target_reg_base(i, musb_base);
2343
2344 musb_write_rxfunaddr(ep_target_regs,
2345 musb->context.index_regs[i].rxfunaddr);
2346 musb_write_rxhubaddr(ep_target_regs,
2347 musb->context.index_regs[i].rxhubaddr);
2348 musb_write_rxhubport(ep_target_regs,
2349 musb->context.index_regs[i].rxhubport);
2350 }
2351 }
2352 }
2353
2354 static int musb_suspend(struct device *dev)
2355 {
2356 struct platform_device *pdev = to_platform_device(dev);
2357 unsigned long flags;
2358 struct musb *musb = dev_to_musb(&pdev->dev);
2359
2360 spin_lock_irqsave(&musb->lock, flags);
2361
2362 if (is_peripheral_active(musb)) {
2363 /* FIXME force disconnect unless we know USB will wake
2364 * the system up quickly enough to respond ...
2365 */
2366 } else if (is_host_active(musb)) {
2367 /* we know all the children are suspended; sometimes
2368 * they will even be wakeup-enabled.
2369 */
2370 }
2371
2372 musb_save_context(musb);
2373
2374 spin_unlock_irqrestore(&musb->lock, flags);
2375 return 0;
2376 }
2377
2378 static int musb_resume_noirq(struct device *dev)
2379 {
2380 struct platform_device *pdev = to_platform_device(dev);
2381 struct musb *musb = dev_to_musb(&pdev->dev);
2382
2383 musb_restore_context(musb);
2384
2385 /* for static cmos like DaVinci, register values were preserved
2386 * unless for some reason the whole soc powered down or the USB
2387 * module got reset through the PSC (vs just being disabled).
2388 */
2389 return 0;
2390 }
2391
2392 static int musb_runtime_suspend(struct device *dev)
2393 {
2394 struct musb *musb = dev_to_musb(dev);
2395
2396 musb_save_context(musb);
2397
2398 return 0;
2399 }
2400
2401 static int musb_runtime_resume(struct device *dev)
2402 {
2403 struct musb *musb = dev_to_musb(dev);
2404 static int first = 1;
2405
2406 /*
2407 * When pm_runtime_get_sync called for the first time in driver
2408 * init, some of the structure is still not initialized which is
2409 * used in restore function. But clock needs to be
2410 * enabled before any register access, so
2411 * pm_runtime_get_sync has to be called.
2412 * Also context restore without save does not make
2413 * any sense
2414 */
2415 if (!first)
2416 musb_restore_context(musb);
2417 first = 0;
2418
2419 return 0;
2420 }
2421
2422 static const struct dev_pm_ops musb_dev_pm_ops = {
2423 .suspend = musb_suspend,
2424 .resume_noirq = musb_resume_noirq,
2425 .runtime_suspend = musb_runtime_suspend,
2426 .runtime_resume = musb_runtime_resume,
2427 };
2428
2429 #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops)
2430 #else
2431 #define MUSB_DEV_PM_OPS NULL
2432 #endif
2433
2434 static struct platform_driver musb_driver = {
2435 .driver = {
2436 .name = (char *)musb_driver_name,
2437 .bus = &platform_bus_type,
2438 .owner = THIS_MODULE,
2439 .pm = MUSB_DEV_PM_OPS,
2440 },
2441 .remove = __exit_p(musb_remove),
2442 .shutdown = musb_shutdown,
2443 };
2444
2445 /*-------------------------------------------------------------------------*/
2446
2447 static int __init musb_init(void)
2448 {
2449 #ifdef CONFIG_USB_MUSB_HDRC_HCD
2450 if (usb_disabled())
2451 return 0;
2452 #endif
2453
2454 pr_info("%s: version " MUSB_VERSION ", "
2455 #ifdef CONFIG_MUSB_PIO_ONLY
2456 "pio"
2457 #elif defined(CONFIG_USB_TI_CPPI_DMA)
2458 "cppi-dma"
2459 #elif defined(CONFIG_USB_INVENTRA_DMA)
2460 "musb-dma"
2461 #elif defined(CONFIG_USB_TUSB_OMAP_DMA)
2462 "tusb-omap-dma"
2463 #else
2464 "?dma?"
2465 #endif
2466 ", "
2467 #ifdef CONFIG_USB_MUSB_OTG
2468 "otg (peripheral+host)"
2469 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
2470 "peripheral"
2471 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
2472 "host"
2473 #endif
2474 ", debug=%d\n",
2475 musb_driver_name, musb_debug);
2476 return platform_driver_probe(&musb_driver, musb_probe);
2477 }
2478
2479 /* make us init after usbcore and i2c (transceivers, regulators, etc)
2480 * and before usb gadget and host-side drivers start to register
2481 */
2482 fs_initcall(musb_init);
2483
2484 static void __exit musb_cleanup(void)
2485 {
2486 platform_driver_unregister(&musb_driver);
2487 }
2488 module_exit(musb_cleanup);
linux-next