2 * MUSB OTG driver core code
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
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.
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.
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
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.
36 * Inventra (Multipoint) Dual-Role Controller Driver for Linux.
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.
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.
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:
54 * - Lack of host-side transaction scheduling, for all transfer types.
55 * The hardware doesn't do it; instead, software must.
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.
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
68 * RESULT: one device may be perceived as blocking another one.
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.
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.
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)
89 * Most of the conditional compilation will (someday) vanish.
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>
103 #include <mach/hardware.h>
104 #include <mach/memory.h>
105 #include <asm/mach-types.h>
108 #include "musb_core.h"
111 #ifdef CONFIG_ARCH_DAVINCI
118 module_param(musb_debug, uint, S_IRUGO | S_IWUSR);
119 MODULE_PARM_DESC(debug, "Debug message level. Default = 0");
121 #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
122 #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"
124 #define MUSB_VERSION "6.0"
126 #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION
128 #define MUSB_DRIVER_NAME "musb_hdrc"
129 const char musb_driver_name[] = MUSB_DRIVER_NAME;
131 MODULE_DESCRIPTION(DRIVER_INFO);
132 MODULE_AUTHOR(DRIVER_AUTHOR);
133 MODULE_LICENSE("GPL");
134 MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
137 /*-------------------------------------------------------------------------*/
139 static inline struct musb *dev_to_musb(struct device *dev)
141 #ifdef CONFIG_USB_MUSB_HDRC_HCD
142 /* usbcore insists dev->driver_data is a "struct hcd *" */
143 return hcd_to_musb(dev_get_drvdata(dev));
145 return dev_get_drvdata(dev);
149 /*-------------------------------------------------------------------------*/
151 #ifndef CONFIG_USB_TUSB6010
153 * Load an endpoint's FIFO
155 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
157 void __iomem *fifo = hw_ep->fifo;
161 DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
162 'T', hw_ep->epnum, fifo, len, src);
164 /* we can't assume unaligned reads work */
165 if (likely((0x01 & (unsigned long) src) == 0)) {
168 /* best case is 32bit-aligned source address */
169 if ((0x02 & (unsigned long) src) == 0) {
171 writesl(fifo, src + index, len >> 2);
172 index += len & ~0x03;
175 musb_writew(fifo, 0, *(u16 *)&src[index]);
180 writesw(fifo, src + index, len >> 1);
181 index += len & ~0x01;
185 musb_writeb(fifo, 0, src[index]);
188 writesb(fifo, src, len);
193 * Unload an endpoint's FIFO
195 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
197 void __iomem *fifo = hw_ep->fifo;
199 DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
200 'R', hw_ep->epnum, fifo, len, dst);
202 /* we can't assume unaligned writes work */
203 if (likely((0x01 & (unsigned long) dst) == 0)) {
206 /* best case is 32bit-aligned destination address */
207 if ((0x02 & (unsigned long) dst) == 0) {
209 readsl(fifo, dst, len >> 2);
213 *(u16 *)&dst[index] = musb_readw(fifo, 0);
218 readsw(fifo, dst, len >> 1);
223 dst[index] = musb_readb(fifo, 0);
226 readsb(fifo, dst, len);
230 #endif /* normal PIO */
233 /*-------------------------------------------------------------------------*/
235 /* for high speed test mode; see USB 2.0 spec 7.1.20 */
236 static const u8 musb_test_packet[53] = {
237 /* implicit SYNC then DATA0 to start */
240 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
242 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
244 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee,
245 /* JJJJJJJKKKKKKK x8 */
246 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
248 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd,
249 /* JKKKKKKK x10, JK */
250 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e
252 /* implicit CRC16 then EOP to end */
255 void musb_load_testpacket(struct musb *musb)
257 void __iomem *regs = musb->endpoints[0].regs;
259 musb_ep_select(musb->mregs, 0);
260 musb_write_fifo(musb->control_ep,
261 sizeof(musb_test_packet), musb_test_packet);
262 musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY);
265 /*-------------------------------------------------------------------------*/
267 const char *otg_state_string(struct musb *musb)
269 switch (musb->xceiv.state) {
270 case OTG_STATE_A_IDLE: return "a_idle";
271 case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
272 case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
273 case OTG_STATE_A_HOST: return "a_host";
274 case OTG_STATE_A_SUSPEND: return "a_suspend";
275 case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
276 case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
277 case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
278 case OTG_STATE_B_IDLE: return "b_idle";
279 case OTG_STATE_B_SRP_INIT: return "b_srp_init";
280 case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
281 case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
282 case OTG_STATE_B_HOST: return "b_host";
283 default: return "UNDEFINED";
287 #ifdef CONFIG_USB_MUSB_OTG
290 * See also USB_OTG_1-3.pdf 6.6.5 Timers
291 * REVISIT: Are the other timers done in the hardware?
293 #define TB_ASE0_BRST 100 /* Min 3.125 ms */
296 * Handles OTG hnp timeouts, such as b_ase0_brst
298 void musb_otg_timer_func(unsigned long data)
300 struct musb *musb = (struct musb *)data;
303 spin_lock_irqsave(&musb->lock, flags);
304 switch (musb->xceiv.state) {
305 case OTG_STATE_B_WAIT_ACON:
306 DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n");
307 musb_g_disconnect(musb);
308 musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
311 case OTG_STATE_A_WAIT_BCON:
312 DBG(1, "HNP: a_wait_bcon timeout; back to a_host\n");
316 DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb));
318 musb->ignore_disconnect = 0;
319 spin_unlock_irqrestore(&musb->lock, flags);
322 static DEFINE_TIMER(musb_otg_timer, musb_otg_timer_func, 0, 0);
325 * Stops the B-device HNP state. Caller must take care of locking.
327 void musb_hnp_stop(struct musb *musb)
329 struct usb_hcd *hcd = musb_to_hcd(musb);
330 void __iomem *mbase = musb->mregs;
333 switch (musb->xceiv.state) {
334 case OTG_STATE_A_PERIPHERAL:
335 case OTG_STATE_A_WAIT_VFALL:
336 case OTG_STATE_A_WAIT_BCON:
337 DBG(1, "HNP: Switching back to A-host\n");
338 musb_g_disconnect(musb);
339 musb->xceiv.state = OTG_STATE_A_IDLE;
343 case OTG_STATE_B_HOST:
344 DBG(1, "HNP: Disabling HR\n");
345 hcd->self.is_b_host = 0;
346 musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
348 reg = musb_readb(mbase, MUSB_POWER);
349 reg |= MUSB_POWER_SUSPENDM;
350 musb_writeb(mbase, MUSB_POWER, reg);
351 /* REVISIT: Start SESSION_REQUEST here? */
354 DBG(1, "HNP: Stopping in unknown state %s\n",
355 otg_state_string(musb));
359 * When returning to A state after HNP, avoid hub_port_rebounce(),
360 * which cause occasional OPT A "Did not receive reset after connect"
363 musb->port1_status &=
364 ~(1 << USB_PORT_FEAT_C_CONNECTION);
370 * Interrupt Service Routine to record USB "global" interrupts.
371 * Since these do not happen often and signify things of
372 * paramount importance, it seems OK to check them individually;
373 * the order of the tests is specified in the manual
375 * @param musb instance pointer
376 * @param int_usb register contents
381 #define STAGE0_MASK (MUSB_INTR_RESUME | MUSB_INTR_SESSREQ \
382 | MUSB_INTR_VBUSERROR | MUSB_INTR_CONNECT \
385 static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
388 irqreturn_t handled = IRQ_NONE;
389 void __iomem *mbase = musb->mregs;
391 DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
394 /* in host mode, the peripheral may issue remote wakeup.
395 * in peripheral mode, the host may resume the link.
396 * spurious RESUME irqs happen too, paired with SUSPEND.
398 if (int_usb & MUSB_INTR_RESUME) {
399 handled = IRQ_HANDLED;
400 DBG(3, "RESUME (%s)\n", otg_state_string(musb));
402 if (devctl & MUSB_DEVCTL_HM) {
403 #ifdef CONFIG_USB_MUSB_HDRC_HCD
404 switch (musb->xceiv.state) {
405 case OTG_STATE_A_SUSPEND:
406 /* remote wakeup? later, GetPortStatus
407 * will stop RESUME signaling
410 if (power & MUSB_POWER_SUSPENDM) {
412 musb->int_usb &= ~MUSB_INTR_SUSPEND;
413 DBG(2, "Spurious SUSPENDM\n");
417 power &= ~MUSB_POWER_SUSPENDM;
418 musb_writeb(mbase, MUSB_POWER,
419 power | MUSB_POWER_RESUME);
421 musb->port1_status |=
422 (USB_PORT_STAT_C_SUSPEND << 16)
423 | MUSB_PORT_STAT_RESUME;
424 musb->rh_timer = jiffies
425 + msecs_to_jiffies(20);
427 musb->xceiv.state = OTG_STATE_A_HOST;
429 usb_hcd_resume_root_hub(musb_to_hcd(musb));
431 case OTG_STATE_B_WAIT_ACON:
432 musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
437 WARNING("bogus %s RESUME (%s)\n",
439 otg_state_string(musb));
443 switch (musb->xceiv.state) {
444 #ifdef CONFIG_USB_MUSB_HDRC_HCD
445 case OTG_STATE_A_SUSPEND:
446 /* possibly DISCONNECT is upcoming */
447 musb->xceiv.state = OTG_STATE_A_HOST;
448 usb_hcd_resume_root_hub(musb_to_hcd(musb));
451 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
452 case OTG_STATE_B_WAIT_ACON:
453 case OTG_STATE_B_PERIPHERAL:
454 /* disconnect while suspended? we may
455 * not get a disconnect irq...
457 if ((devctl & MUSB_DEVCTL_VBUS)
458 != (3 << MUSB_DEVCTL_VBUS_SHIFT)
460 musb->int_usb |= MUSB_INTR_DISCONNECT;
461 musb->int_usb &= ~MUSB_INTR_SUSPEND;
466 case OTG_STATE_B_IDLE:
467 musb->int_usb &= ~MUSB_INTR_SUSPEND;
471 WARNING("bogus %s RESUME (%s)\n",
473 otg_state_string(musb));
478 #ifdef CONFIG_USB_MUSB_HDRC_HCD
479 /* see manual for the order of the tests */
480 if (int_usb & MUSB_INTR_SESSREQ) {
481 DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb));
483 /* IRQ arrives from ID pin sense or (later, if VBUS power
484 * is removed) SRP. responses are time critical:
485 * - turn on VBUS (with silicon-specific mechanism)
486 * - go through A_WAIT_VRISE
487 * - ... to A_WAIT_BCON.
488 * a_wait_vrise_tmout triggers VBUS_ERROR transitions
490 musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
491 musb->ep0_stage = MUSB_EP0_START;
492 musb->xceiv.state = OTG_STATE_A_IDLE;
494 musb_set_vbus(musb, 1);
496 handled = IRQ_HANDLED;
499 if (int_usb & MUSB_INTR_VBUSERROR) {
502 /* During connection as an A-Device, we may see a short
503 * current spikes causing voltage drop, because of cable
504 * and peripheral capacitance combined with vbus draw.
505 * (So: less common with truly self-powered devices, where
506 * vbus doesn't act like a power supply.)
508 * Such spikes are short; usually less than ~500 usec, max
509 * of ~2 msec. That is, they're not sustained overcurrent
510 * errors, though they're reported using VBUSERROR irqs.
512 * Workarounds: (a) hardware: use self powered devices.
513 * (b) software: ignore non-repeated VBUS errors.
515 * REVISIT: do delays from lots of DEBUG_KERNEL checks
516 * make trouble here, keeping VBUS < 4.4V ?
518 switch (musb->xceiv.state) {
519 case OTG_STATE_A_HOST:
520 /* recovery is dicey once we've gotten past the
521 * initial stages of enumeration, but if VBUS
522 * stayed ok at the other end of the link, and
523 * another reset is due (at least for high speed,
524 * to redo the chirp etc), it might work OK...
526 case OTG_STATE_A_WAIT_BCON:
527 case OTG_STATE_A_WAIT_VRISE:
528 if (musb->vbuserr_retry) {
529 musb->vbuserr_retry--;
531 devctl |= MUSB_DEVCTL_SESSION;
532 musb_writeb(mbase, MUSB_DEVCTL, devctl);
534 musb->port1_status |=
535 (1 << USB_PORT_FEAT_OVER_CURRENT)
536 | (1 << USB_PORT_FEAT_C_OVER_CURRENT);
543 DBG(1, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
544 otg_state_string(musb),
547 switch (devctl & MUSB_DEVCTL_VBUS) {
548 case 0 << MUSB_DEVCTL_VBUS_SHIFT:
549 s = "<SessEnd"; break;
550 case 1 << MUSB_DEVCTL_VBUS_SHIFT:
551 s = "<AValid"; break;
552 case 2 << MUSB_DEVCTL_VBUS_SHIFT:
553 s = "<VBusValid"; break;
554 /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */
558 VBUSERR_RETRY_COUNT - musb->vbuserr_retry,
561 /* go through A_WAIT_VFALL then start a new session */
563 musb_set_vbus(musb, 0);
564 handled = IRQ_HANDLED;
567 if (int_usb & MUSB_INTR_CONNECT) {
568 struct usb_hcd *hcd = musb_to_hcd(musb);
570 handled = IRQ_HANDLED;
572 set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
574 musb->ep0_stage = MUSB_EP0_START;
576 #ifdef CONFIG_USB_MUSB_OTG
577 /* flush endpoints when transitioning from Device Mode */
578 if (is_peripheral_active(musb)) {
579 /* REVISIT HNP; just force disconnect */
581 musb_writew(mbase, MUSB_INTRTXE, musb->epmask);
582 musb_writew(mbase, MUSB_INTRRXE, musb->epmask & 0xfffe);
583 musb_writeb(mbase, MUSB_INTRUSBE, 0xf7);
585 musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED
586 |USB_PORT_STAT_HIGH_SPEED
587 |USB_PORT_STAT_ENABLE
589 musb->port1_status |= USB_PORT_STAT_CONNECTION
590 |(USB_PORT_STAT_C_CONNECTION << 16);
592 /* high vs full speed is just a guess until after reset */
593 if (devctl & MUSB_DEVCTL_LSDEV)
594 musb->port1_status |= USB_PORT_STAT_LOW_SPEED;
597 usb_hcd_poll_rh_status(hcd);
599 usb_hcd_resume_root_hub(hcd);
603 /* indicate new connection to OTG machine */
604 switch (musb->xceiv.state) {
605 case OTG_STATE_B_PERIPHERAL:
606 if (int_usb & MUSB_INTR_SUSPEND) {
607 DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n");
608 musb->xceiv.state = OTG_STATE_B_HOST;
609 hcd->self.is_b_host = 1;
610 int_usb &= ~MUSB_INTR_SUSPEND;
612 DBG(1, "CONNECT as b_peripheral???\n");
614 case OTG_STATE_B_WAIT_ACON:
615 DBG(1, "HNP: Waiting to switch to b_host state\n");
616 musb->xceiv.state = OTG_STATE_B_HOST;
617 hcd->self.is_b_host = 1;
620 if ((devctl & MUSB_DEVCTL_VBUS)
621 == (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
622 musb->xceiv.state = OTG_STATE_A_HOST;
623 hcd->self.is_b_host = 0;
627 DBG(1, "CONNECT (%s) devctl %02x\n",
628 otg_state_string(musb), devctl);
630 #endif /* CONFIG_USB_MUSB_HDRC_HCD */
632 /* mentor saves a bit: bus reset and babble share the same irq.
633 * only host sees babble; only peripheral sees bus reset.
635 if (int_usb & MUSB_INTR_RESET) {
636 if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) {
638 * Looks like non-HS BABBLE can be ignored, but
639 * HS BABBLE is an error condition. For HS the solution
640 * is to avoid babble in the first place and fix what
641 * caused BABBLE. When HS BABBLE happens we can only
644 if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
645 DBG(1, "BABBLE devctl: %02x\n", devctl);
647 ERR("Stopping host session -- babble\n");
648 musb_writeb(mbase, MUSB_DEVCTL, 0);
650 } else if (is_peripheral_capable()) {
651 DBG(1, "BUS RESET as %s\n", otg_state_string(musb));
652 switch (musb->xceiv.state) {
653 #ifdef CONFIG_USB_OTG
654 case OTG_STATE_A_SUSPEND:
655 /* We need to ignore disconnect on suspend
656 * otherwise tusb 2.0 won't reconnect after a
657 * power cycle, which breaks otg compliance.
659 musb->ignore_disconnect = 1;
662 case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */
663 DBG(1, "HNP: Setting timer as %s\n",
664 otg_state_string(musb));
665 musb_otg_timer.data = (unsigned long)musb;
666 mod_timer(&musb_otg_timer, jiffies
667 + msecs_to_jiffies(100));
669 case OTG_STATE_A_PERIPHERAL:
672 case OTG_STATE_B_WAIT_ACON:
673 DBG(1, "HNP: RESET (%s), to b_peripheral\n",
674 otg_state_string(musb));
675 musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
679 case OTG_STATE_B_IDLE:
680 musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
682 case OTG_STATE_B_PERIPHERAL:
686 DBG(1, "Unhandled BUS RESET as %s\n",
687 otg_state_string(musb));
691 handled = IRQ_HANDLED;
693 schedule_work(&musb->irq_work);
699 * Interrupt Service Routine to record USB "global" interrupts.
700 * Since these do not happen often and signify things of
701 * paramount importance, it seems OK to check them individually;
702 * the order of the tests is specified in the manual
704 * @param musb instance pointer
705 * @param int_usb register contents
709 static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
712 irqreturn_t handled = IRQ_NONE;
715 /* REVISIT ... this would be for multiplexing periodic endpoints, or
716 * supporting transfer phasing to prevent exceeding ISO bandwidth
717 * limits of a given frame or microframe.
719 * It's not needed for peripheral side, which dedicates endpoints;
720 * though it _might_ use SOF irqs for other purposes.
722 * And it's not currently needed for host side, which also dedicates
723 * endpoints, relies on TX/RX interval registers, and isn't claimed
724 * to support ISO transfers yet.
726 if (int_usb & MUSB_INTR_SOF) {
727 void __iomem *mbase = musb->mregs;
728 struct musb_hw_ep *ep;
732 DBG(6, "START_OF_FRAME\n");
733 handled = IRQ_HANDLED;
735 /* start any periodic Tx transfers waiting for current frame */
736 frame = musb_readw(mbase, MUSB_FRAME);
737 ep = musb->endpoints;
738 for (epnum = 1; (epnum < musb->nr_endpoints)
739 && (musb->epmask >= (1 << epnum));
742 * FIXME handle framecounter wraps (12 bits)
743 * eliminate duplicated StartUrb logic
745 if (ep->dwWaitFrame >= frame) {
747 pr_debug("SOF --> periodic TX%s on %d\n",
748 ep->tx_channel ? " DMA" : "",
751 musb_h_tx_start(musb, epnum);
753 cppi_hostdma_start(musb, epnum);
755 } /* end of for loop */
759 if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
760 DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n",
761 otg_state_string(musb),
762 MUSB_MODE(musb), devctl);
763 handled = IRQ_HANDLED;
765 switch (musb->xceiv.state) {
766 #ifdef CONFIG_USB_MUSB_HDRC_HCD
767 case OTG_STATE_A_HOST:
768 case OTG_STATE_A_SUSPEND:
769 musb_root_disconnect(musb);
770 if (musb->a_wait_bcon != 0)
771 musb_platform_try_idle(musb, jiffies
772 + msecs_to_jiffies(musb->a_wait_bcon));
775 #ifdef CONFIG_USB_MUSB_OTG
776 case OTG_STATE_B_HOST:
779 case OTG_STATE_A_PERIPHERAL:
781 musb_root_disconnect(musb);
783 case OTG_STATE_B_WAIT_ACON:
786 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
787 case OTG_STATE_B_PERIPHERAL:
788 case OTG_STATE_B_IDLE:
789 musb_g_disconnect(musb);
793 WARNING("unhandled DISCONNECT transition (%s)\n",
794 otg_state_string(musb));
798 schedule_work(&musb->irq_work);
801 if (int_usb & MUSB_INTR_SUSPEND) {
802 DBG(1, "SUSPEND (%s) devctl %02x power %02x\n",
803 otg_state_string(musb), devctl, power);
804 handled = IRQ_HANDLED;
806 switch (musb->xceiv.state) {
807 #ifdef CONFIG_USB_MUSB_OTG
808 case OTG_STATE_A_PERIPHERAL:
810 * We cannot stop HNP here, devctl BDEVICE might be
815 case OTG_STATE_B_PERIPHERAL:
816 musb_g_suspend(musb);
817 musb->is_active = is_otg_enabled(musb)
818 && musb->xceiv.gadget->b_hnp_enable;
819 if (musb->is_active) {
820 #ifdef CONFIG_USB_MUSB_OTG
821 musb->xceiv.state = OTG_STATE_B_WAIT_ACON;
822 DBG(1, "HNP: Setting timer for b_ase0_brst\n");
823 musb_otg_timer.data = (unsigned long)musb;
824 mod_timer(&musb_otg_timer, jiffies
825 + msecs_to_jiffies(TB_ASE0_BRST));
829 case OTG_STATE_A_WAIT_BCON:
830 if (musb->a_wait_bcon != 0)
831 musb_platform_try_idle(musb, jiffies
832 + msecs_to_jiffies(musb->a_wait_bcon));
834 case OTG_STATE_A_HOST:
835 musb->xceiv.state = OTG_STATE_A_SUSPEND;
836 musb->is_active = is_otg_enabled(musb)
837 && musb->xceiv.host->b_hnp_enable;
839 case OTG_STATE_B_HOST:
840 /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
841 DBG(1, "REVISIT: SUSPEND as B_HOST\n");
844 /* "should not happen" */
848 schedule_work(&musb->irq_work);
855 /*-------------------------------------------------------------------------*/
858 * Program the HDRC to start (enable interrupts, dma, etc.).
860 void musb_start(struct musb *musb)
862 void __iomem *regs = musb->mregs;
863 u8 devctl = musb_readb(regs, MUSB_DEVCTL);
865 DBG(2, "<== devctl %02x\n", devctl);
867 /* Set INT enable registers, enable interrupts */
868 musb_writew(regs, MUSB_INTRTXE, musb->epmask);
869 musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe);
870 musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
872 musb_writeb(regs, MUSB_TESTMODE, 0);
874 /* put into basic highspeed mode and start session */
875 musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
876 | MUSB_POWER_SOFTCONN
878 /* ENSUSPEND wedges tusb */
879 /* | MUSB_POWER_ENSUSPEND */
883 devctl = musb_readb(regs, MUSB_DEVCTL);
884 devctl &= ~MUSB_DEVCTL_SESSION;
886 if (is_otg_enabled(musb)) {
887 /* session started after:
888 * (a) ID-grounded irq, host mode;
889 * (b) vbus present/connect IRQ, peripheral mode;
890 * (c) peripheral initiates, using SRP
892 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
895 devctl |= MUSB_DEVCTL_SESSION;
897 } else if (is_host_enabled(musb)) {
898 /* assume ID pin is hard-wired to ground */
899 devctl |= MUSB_DEVCTL_SESSION;
901 } else /* peripheral is enabled */ {
902 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
905 musb_platform_enable(musb);
906 musb_writeb(regs, MUSB_DEVCTL, devctl);
910 static void musb_generic_disable(struct musb *musb)
912 void __iomem *mbase = musb->mregs;
915 /* disable interrupts */
916 musb_writeb(mbase, MUSB_INTRUSBE, 0);
917 musb_writew(mbase, MUSB_INTRTXE, 0);
918 musb_writew(mbase, MUSB_INTRRXE, 0);
921 musb_writeb(mbase, MUSB_DEVCTL, 0);
923 /* flush pending interrupts */
924 temp = musb_readb(mbase, MUSB_INTRUSB);
925 temp = musb_readw(mbase, MUSB_INTRTX);
926 temp = musb_readw(mbase, MUSB_INTRRX);
931 * Make the HDRC stop (disable interrupts, etc.);
932 * reversible by musb_start
933 * called on gadget driver unregister
934 * with controller locked, irqs blocked
935 * acts as a NOP unless some role activated the hardware
937 void musb_stop(struct musb *musb)
939 /* stop IRQs, timers, ... */
940 musb_platform_disable(musb);
941 musb_generic_disable(musb);
942 DBG(3, "HDRC disabled\n");
945 * - mark host and/or peripheral drivers unusable/inactive
946 * - disable DMA (and enable it in HdrcStart)
947 * - make sure we can musb_start() after musb_stop(); with
948 * OTG mode, gadget driver module rmmod/modprobe cycles that
951 musb_platform_try_idle(musb, 0);
954 static void musb_shutdown(struct platform_device *pdev)
956 struct musb *musb = dev_to_musb(&pdev->dev);
959 spin_lock_irqsave(&musb->lock, flags);
960 musb_platform_disable(musb);
961 musb_generic_disable(musb);
963 clk_put(musb->clock);
966 spin_unlock_irqrestore(&musb->lock, flags);
968 /* FIXME power down */
972 /*-------------------------------------------------------------------------*/
975 * The silicon either has hard-wired endpoint configurations, or else
976 * "dynamic fifo" sizing. The driver has support for both, though at this
977 * writing only the dynamic sizing is very well tested. Since we switched
978 * away from compile-time hardware parameters, we can no longer rely on
979 * dead code elimination to leave only the relevant one in the object file.
981 * We don't currently use dynamic fifo setup capability to do anything
982 * more than selecting one of a bunch of predefined configurations.
984 #if defined(CONFIG_USB_TUSB6010) || \
985 defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX)
986 static ushort __initdata fifo_mode = 4;
988 static ushort __initdata fifo_mode = 2;
991 /* "modprobe ... fifo_mode=1" etc */
992 module_param(fifo_mode, ushort, 0);
993 MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration");
996 enum fifo_style { FIFO_RXTX, FIFO_TX, FIFO_RX } __attribute__ ((packed));
997 enum buf_mode { BUF_SINGLE, BUF_DOUBLE } __attribute__ ((packed));
1001 enum fifo_style style;
1007 * tables defining fifo_mode values. define more if you like.
1008 * for host side, make sure both halves of ep1 are set up.
1011 /* mode 0 - fits in 2KB */
1012 static struct fifo_cfg __initdata mode_0_cfg[] = {
1013 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1014 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1015 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, },
1016 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1017 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1020 /* mode 1 - fits in 4KB */
1021 static struct fifo_cfg __initdata mode_1_cfg[] = {
1022 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1023 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1024 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1025 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1026 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1029 /* mode 2 - fits in 4KB */
1030 static struct fifo_cfg __initdata mode_2_cfg[] = {
1031 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1032 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1033 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1034 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1035 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1036 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1039 /* mode 3 - fits in 4KB */
1040 static struct fifo_cfg __initdata mode_3_cfg[] = {
1041 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1042 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1043 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1044 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1045 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1046 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1049 /* mode 4 - fits in 16KB */
1050 static struct fifo_cfg __initdata mode_4_cfg[] = {
1051 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1052 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1053 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1054 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1055 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1056 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1057 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1058 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1059 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1060 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1061 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, },
1062 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, },
1063 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
1064 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, },
1065 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, },
1066 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, },
1067 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, },
1068 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, },
1069 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 512, },
1070 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 512, },
1071 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 512, },
1072 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 512, },
1073 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 512, },
1074 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 512, },
1075 { .hw_ep_num = 13, .style = FIFO_TX, .maxpacket = 512, },
1076 { .hw_ep_num = 13, .style = FIFO_RX, .maxpacket = 512, },
1077 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1078 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1083 * configure a fifo; for non-shared endpoints, this may be called
1084 * once for a tx fifo and once for an rx fifo.
1086 * returns negative errno or offset for next fifo.
1089 fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep,
1090 const struct fifo_cfg *cfg, u16 offset)
1092 void __iomem *mbase = musb->mregs;
1094 u16 maxpacket = cfg->maxpacket;
1095 u16 c_off = offset >> 3;
1098 /* expect hw_ep has already been zero-initialized */
1100 size = ffs(max(maxpacket, (u16) 8)) - 1;
1101 maxpacket = 1 << size;
1104 if (cfg->mode == BUF_DOUBLE) {
1105 if ((offset + (maxpacket << 1)) >
1106 (1 << (musb->config->ram_bits + 2)))
1108 c_size |= MUSB_FIFOSZ_DPB;
1110 if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2)))
1114 /* configure the FIFO */
1115 musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum);
1117 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1118 /* EP0 reserved endpoint for control, bidirectional;
1119 * EP1 reserved for bulk, two unidirection halves.
1121 if (hw_ep->epnum == 1)
1122 musb->bulk_ep = hw_ep;
1123 /* REVISIT error check: be sure ep0 can both rx and tx ... */
1125 switch (cfg->style) {
1127 musb_writeb(mbase, MUSB_TXFIFOSZ, c_size);
1128 musb_writew(mbase, MUSB_TXFIFOADD, c_off);
1129 hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1130 hw_ep->max_packet_sz_tx = maxpacket;
1133 musb_writeb(mbase, MUSB_RXFIFOSZ, c_size);
1134 musb_writew(mbase, MUSB_RXFIFOADD, c_off);
1135 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1136 hw_ep->max_packet_sz_rx = maxpacket;
1139 musb_writeb(mbase, MUSB_TXFIFOSZ, c_size);
1140 musb_writew(mbase, MUSB_TXFIFOADD, c_off);
1141 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1142 hw_ep->max_packet_sz_rx = maxpacket;
1144 musb_writeb(mbase, MUSB_RXFIFOSZ, c_size);
1145 musb_writew(mbase, MUSB_RXFIFOADD, c_off);
1146 hw_ep->tx_double_buffered = hw_ep->rx_double_buffered;
1147 hw_ep->max_packet_sz_tx = maxpacket;
1149 hw_ep->is_shared_fifo = true;
1153 /* NOTE rx and tx endpoint irqs aren't managed separately,
1154 * which happens to be ok
1156 musb->epmask |= (1 << hw_ep->epnum);
1158 return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0));
1161 static struct fifo_cfg __initdata ep0_cfg = {
1162 .style = FIFO_RXTX, .maxpacket = 64,
1165 static int __init ep_config_from_table(struct musb *musb)
1167 const struct fifo_cfg *cfg;
1170 struct musb_hw_ep *hw_ep = musb->endpoints;
1172 switch (fifo_mode) {
1178 n = ARRAY_SIZE(mode_0_cfg);
1182 n = ARRAY_SIZE(mode_1_cfg);
1186 n = ARRAY_SIZE(mode_2_cfg);
1190 n = ARRAY_SIZE(mode_3_cfg);
1194 n = ARRAY_SIZE(mode_4_cfg);
1198 printk(KERN_DEBUG "%s: setup fifo_mode %d\n",
1199 musb_driver_name, fifo_mode);
1202 offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0);
1203 /* assert(offset > 0) */
1205 /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would
1206 * be better than static musb->config->num_eps and DYN_FIFO_SIZE...
1209 for (i = 0; i < n; i++) {
1210 u8 epn = cfg->hw_ep_num;
1212 if (epn >= musb->config->num_eps) {
1213 pr_debug("%s: invalid ep %d\n",
1214 musb_driver_name, epn);
1217 offset = fifo_setup(musb, hw_ep + epn, cfg++, offset);
1219 pr_debug("%s: mem overrun, ep %d\n",
1220 musb_driver_name, epn);
1224 musb->nr_endpoints = max(epn, musb->nr_endpoints);
1227 printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n",
1229 n + 1, musb->config->num_eps * 2 - 1,
1230 offset, (1 << (musb->config->ram_bits + 2)));
1232 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1233 if (!musb->bulk_ep) {
1234 pr_debug("%s: missing bulk\n", musb_driver_name);
1244 * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false
1245 * @param musb the controller
1247 static int __init ep_config_from_hw(struct musb *musb)
1250 struct musb_hw_ep *hw_ep;
1251 void *mbase = musb->mregs;
1253 DBG(2, "<== static silicon ep config\n");
1255 /* FIXME pick up ep0 maxpacket size */
1257 for (epnum = 1; epnum < musb->config->num_eps; epnum++) {
1258 musb_ep_select(mbase, epnum);
1259 hw_ep = musb->endpoints + epnum;
1261 /* read from core using indexed model */
1262 reg = musb_readb(hw_ep->regs, 0x10 + MUSB_FIFOSIZE);
1264 /* 0's returned when no more endpoints */
1267 musb->nr_endpoints++;
1268 musb->epmask |= (1 << epnum);
1270 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
1272 /* shared TX/RX FIFO? */
1273 if ((reg & 0xf0) == 0xf0) {
1274 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
1275 hw_ep->is_shared_fifo = true;
1278 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
1279 hw_ep->is_shared_fifo = false;
1282 /* FIXME set up hw_ep->{rx,tx}_double_buffered */
1284 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1285 /* pick an RX/TX endpoint for bulk */
1286 if (hw_ep->max_packet_sz_tx < 512
1287 || hw_ep->max_packet_sz_rx < 512)
1290 /* REVISIT: this algorithm is lazy, we should at least
1291 * try to pick a double buffered endpoint.
1295 musb->bulk_ep = hw_ep;
1299 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1300 if (!musb->bulk_ep) {
1301 pr_debug("%s: missing bulk\n", musb_driver_name);
1309 enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, };
1311 /* Initialize MUSB (M)HDRC part of the USB hardware subsystem;
1312 * configure endpoints, or take their config from silicon
1314 static int __init musb_core_init(u16 musb_type, struct musb *musb)
1321 u16 hwvers, rev_major, rev_minor;
1322 char aInfo[78], aRevision[32], aDate[12];
1323 void __iomem *mbase = musb->mregs;
1327 /* log core options (read using indexed model) */
1328 musb_ep_select(mbase, 0);
1329 reg = musb_readb(mbase, 0x10 + MUSB_CONFIGDATA);
1331 strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8");
1332 if (reg & MUSB_CONFIGDATA_DYNFIFO)
1333 strcat(aInfo, ", dyn FIFOs");
1334 if (reg & MUSB_CONFIGDATA_MPRXE) {
1335 strcat(aInfo, ", bulk combine");
1337 musb->bulk_combine = true;
1339 strcat(aInfo, " (X)"); /* no driver support */
1342 if (reg & MUSB_CONFIGDATA_MPTXE) {
1343 strcat(aInfo, ", bulk split");
1345 musb->bulk_split = true;
1347 strcat(aInfo, " (X)"); /* no driver support */
1350 if (reg & MUSB_CONFIGDATA_HBRXE) {
1351 strcat(aInfo, ", HB-ISO Rx");
1352 strcat(aInfo, " (X)"); /* no driver support */
1354 if (reg & MUSB_CONFIGDATA_HBTXE) {
1355 strcat(aInfo, ", HB-ISO Tx");
1356 strcat(aInfo, " (X)"); /* no driver support */
1358 if (reg & MUSB_CONFIGDATA_SOFTCONE)
1359 strcat(aInfo, ", SoftConn");
1361 printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n",
1362 musb_driver_name, reg, aInfo);
1365 data = musb_readl(mbase, 0x404);
1366 sprintf(aDate, "%04d-%02x-%02x", (data & 0xffff),
1367 (data >> 16) & 0xff, (data >> 24) & 0xff);
1368 /* FIXME ID2 and ID3 are unused */
1369 data = musb_readl(mbase, 0x408);
1370 printk(KERN_DEBUG "ID2=%lx\n", (long unsigned)data);
1371 data = musb_readl(mbase, 0x40c);
1372 printk(KERN_DEBUG "ID3=%lx\n", (long unsigned)data);
1373 reg = musb_readb(mbase, 0x400);
1374 musb_type = ('M' == reg) ? MUSB_CONTROLLER_MHDRC : MUSB_CONTROLLER_HDRC;
1378 if (MUSB_CONTROLLER_MHDRC == musb_type) {
1379 musb->is_multipoint = 1;
1382 musb->is_multipoint = 0;
1384 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1385 #ifndef CONFIG_USB_OTG_BLACKLIST_HUB
1387 "%s: kernel must blacklist external hubs\n",
1393 /* log release info */
1394 hwvers = musb_readw(mbase, MUSB_HWVERS);
1395 rev_major = (hwvers >> 10) & 0x1f;
1396 rev_minor = hwvers & 0x3ff;
1397 snprintf(aRevision, 32, "%d.%d%s", rev_major,
1398 rev_minor, (hwvers & 0x8000) ? "RC" : "");
1399 printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n",
1400 musb_driver_name, type, aRevision, aDate);
1403 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
1404 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
1406 /* discover endpoint configuration */
1407 musb->nr_endpoints = 1;
1410 if (reg & MUSB_CONFIGDATA_DYNFIFO) {
1411 if (musb->config->dyn_fifo)
1412 status = ep_config_from_table(musb);
1414 ERR("reconfigure software for Dynamic FIFOs\n");
1418 if (!musb->config->dyn_fifo)
1419 status = ep_config_from_hw(musb);
1421 ERR("reconfigure software for static FIFOs\n");
1429 /* finish init, and print endpoint config */
1430 for (i = 0; i < musb->nr_endpoints; i++) {
1431 struct musb_hw_ep *hw_ep = musb->endpoints + i;
1433 hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase;
1434 #ifdef CONFIG_USB_TUSB6010
1435 hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i);
1436 hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i);
1437 hw_ep->fifo_sync_va =
1438 musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i);
1441 hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF;
1443 hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2);
1446 hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase;
1447 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1448 hw_ep->target_regs = MUSB_BUSCTL_OFFSET(i, 0) + mbase;
1449 hw_ep->rx_reinit = 1;
1450 hw_ep->tx_reinit = 1;
1453 if (hw_ep->max_packet_sz_tx) {
1455 "%s: hw_ep %d%s, %smax %d\n",
1456 musb_driver_name, i,
1457 hw_ep->is_shared_fifo ? "shared" : "tx",
1458 hw_ep->tx_double_buffered
1459 ? "doublebuffer, " : "",
1460 hw_ep->max_packet_sz_tx);
1462 if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
1464 "%s: hw_ep %d%s, %smax %d\n",
1465 musb_driver_name, i,
1467 hw_ep->rx_double_buffered
1468 ? "doublebuffer, " : "",
1469 hw_ep->max_packet_sz_rx);
1471 if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
1472 DBG(1, "hw_ep %d not configured\n", i);
1478 /*-------------------------------------------------------------------------*/
1480 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)
1482 static irqreturn_t generic_interrupt(int irq, void *__hci)
1484 unsigned long flags;
1485 irqreturn_t retval = IRQ_NONE;
1486 struct musb *musb = __hci;
1488 spin_lock_irqsave(&musb->lock, flags);
1490 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
1491 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
1492 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
1494 if (musb->int_usb || musb->int_tx || musb->int_rx)
1495 retval = musb_interrupt(musb);
1497 spin_unlock_irqrestore(&musb->lock, flags);
1499 /* REVISIT we sometimes get spurious IRQs on g_ep0
1502 if (retval != IRQ_HANDLED)
1503 DBG(5, "spurious?\n");
1509 #define generic_interrupt NULL
1513 * handle all the irqs defined by the HDRC core. for now we expect: other
1514 * irq sources (phy, dma, etc) will be handled first, musb->int_* values
1515 * will be assigned, and the irq will already have been acked.
1517 * called in irq context with spinlock held, irqs blocked
1519 irqreturn_t musb_interrupt(struct musb *musb)
1521 irqreturn_t retval = IRQ_NONE;
1526 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1527 power = musb_readb(musb->mregs, MUSB_POWER);
1529 DBG(4, "** IRQ %s usb%04x tx%04x rx%04x\n",
1530 (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
1531 musb->int_usb, musb->int_tx, musb->int_rx);
1533 /* the core can interrupt us for multiple reasons; docs have
1534 * a generic interrupt flowchart to follow
1536 if (musb->int_usb & STAGE0_MASK)
1537 retval |= musb_stage0_irq(musb, musb->int_usb,
1540 /* "stage 1" is handling endpoint irqs */
1542 /* handle endpoint 0 first */
1543 if (musb->int_tx & 1) {
1544 if (devctl & MUSB_DEVCTL_HM)
1545 retval |= musb_h_ep0_irq(musb);
1547 retval |= musb_g_ep0_irq(musb);
1550 /* RX on endpoints 1-15 */
1551 reg = musb->int_rx >> 1;
1555 /* musb_ep_select(musb->mregs, ep_num); */
1556 /* REVISIT just retval = ep->rx_irq(...) */
1557 retval = IRQ_HANDLED;
1558 if (devctl & MUSB_DEVCTL_HM) {
1559 if (is_host_capable())
1560 musb_host_rx(musb, ep_num);
1562 if (is_peripheral_capable())
1563 musb_g_rx(musb, ep_num);
1571 /* TX on endpoints 1-15 */
1572 reg = musb->int_tx >> 1;
1576 /* musb_ep_select(musb->mregs, ep_num); */
1577 /* REVISIT just retval |= ep->tx_irq(...) */
1578 retval = IRQ_HANDLED;
1579 if (devctl & MUSB_DEVCTL_HM) {
1580 if (is_host_capable())
1581 musb_host_tx(musb, ep_num);
1583 if (is_peripheral_capable())
1584 musb_g_tx(musb, ep_num);
1591 /* finish handling "global" interrupts after handling fifos */
1593 retval |= musb_stage2_irq(musb,
1594 musb->int_usb, devctl, power);
1600 #ifndef CONFIG_MUSB_PIO_ONLY
1601 static int __initdata use_dma = 1;
1603 /* "modprobe ... use_dma=0" etc */
1604 module_param(use_dma, bool, 0);
1605 MODULE_PARM_DESC(use_dma, "enable/disable use of DMA");
1607 void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
1609 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1611 /* called with controller lock already held */
1614 #ifndef CONFIG_USB_TUSB_OMAP_DMA
1615 if (!is_cppi_enabled()) {
1617 if (devctl & MUSB_DEVCTL_HM)
1618 musb_h_ep0_irq(musb);
1620 musb_g_ep0_irq(musb);
1624 /* endpoints 1..15 */
1626 if (devctl & MUSB_DEVCTL_HM) {
1627 if (is_host_capable())
1628 musb_host_tx(musb, epnum);
1630 if (is_peripheral_capable())
1631 musb_g_tx(musb, epnum);
1635 if (devctl & MUSB_DEVCTL_HM) {
1636 if (is_host_capable())
1637 musb_host_rx(musb, epnum);
1639 if (is_peripheral_capable())
1640 musb_g_rx(musb, epnum);
1650 /*-------------------------------------------------------------------------*/
1655 musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1657 struct musb *musb = dev_to_musb(dev);
1658 unsigned long flags;
1661 spin_lock_irqsave(&musb->lock, flags);
1662 ret = sprintf(buf, "%s\n", otg_state_string(musb));
1663 spin_unlock_irqrestore(&musb->lock, flags);
1669 musb_mode_store(struct device *dev, struct device_attribute *attr,
1670 const char *buf, size_t n)
1672 struct musb *musb = dev_to_musb(dev);
1673 unsigned long flags;
1675 spin_lock_irqsave(&musb->lock, flags);
1676 if (!strncmp(buf, "host", 4))
1677 musb_platform_set_mode(musb, MUSB_HOST);
1678 if (!strncmp(buf, "peripheral", 10))
1679 musb_platform_set_mode(musb, MUSB_PERIPHERAL);
1680 if (!strncmp(buf, "otg", 3))
1681 musb_platform_set_mode(musb, MUSB_OTG);
1682 spin_unlock_irqrestore(&musb->lock, flags);
1686 static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store);
1689 musb_vbus_store(struct device *dev, struct device_attribute *attr,
1690 const char *buf, size_t n)
1692 struct musb *musb = dev_to_musb(dev);
1693 unsigned long flags;
1696 if (sscanf(buf, "%lu", &val) < 1) {
1697 printk(KERN_ERR "Invalid VBUS timeout ms value\n");
1701 spin_lock_irqsave(&musb->lock, flags);
1702 musb->a_wait_bcon = val;
1703 if (musb->xceiv.state == OTG_STATE_A_WAIT_BCON)
1704 musb->is_active = 0;
1705 musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
1706 spin_unlock_irqrestore(&musb->lock, flags);
1712 musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
1714 struct musb *musb = dev_to_musb(dev);
1715 unsigned long flags;
1719 spin_lock_irqsave(&musb->lock, flags);
1720 val = musb->a_wait_bcon;
1721 vbus = musb_platform_get_vbus_status(musb);
1722 spin_unlock_irqrestore(&musb->lock, flags);
1724 return sprintf(buf, "Vbus %s, timeout %lu\n",
1725 vbus ? "on" : "off", val);
1727 static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);
1729 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1731 /* Gadget drivers can't know that a host is connected so they might want
1732 * to start SRP, but users can. This allows userspace to trigger SRP.
1735 musb_srp_store(struct device *dev, struct device_attribute *attr,
1736 const char *buf, size_t n)
1738 struct musb *musb = dev_to_musb(dev);
1741 if (sscanf(buf, "%hu", &srp) != 1
1743 printk(KERN_ERR "SRP: Value must be 1\n");
1748 musb_g_wakeup(musb);
1752 static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store);
1754 #endif /* CONFIG_USB_GADGET_MUSB_HDRC */
1758 /* Only used to provide driver mode change events */
1759 static void musb_irq_work(struct work_struct *data)
1761 struct musb *musb = container_of(data, struct musb, irq_work);
1762 static int old_state;
1764 if (musb->xceiv.state != old_state) {
1765 old_state = musb->xceiv.state;
1766 sysfs_notify(&musb->controller->kobj, NULL, "mode");
1770 /* --------------------------------------------------------------------------
1774 static struct musb *__init
1775 allocate_instance(struct device *dev,
1776 struct musb_hdrc_config *config, void __iomem *mbase)
1779 struct musb_hw_ep *ep;
1781 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1782 struct usb_hcd *hcd;
1784 hcd = usb_create_hcd(&musb_hc_driver, dev, dev->bus_id);
1787 /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */
1789 musb = hcd_to_musb(hcd);
1790 INIT_LIST_HEAD(&musb->control);
1791 INIT_LIST_HEAD(&musb->in_bulk);
1792 INIT_LIST_HEAD(&musb->out_bulk);
1794 hcd->uses_new_polling = 1;
1796 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
1798 musb = kzalloc(sizeof *musb, GFP_KERNEL);
1801 dev_set_drvdata(dev, musb);
1805 musb->mregs = mbase;
1806 musb->ctrl_base = mbase;
1807 musb->nIrq = -ENODEV;
1808 musb->config = config;
1809 BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
1810 for (epnum = 0, ep = musb->endpoints;
1811 epnum < musb->config->num_eps;
1818 musb->controller = dev;
1822 static void musb_free(struct musb *musb)
1824 /* this has multiple entry modes. it handles fault cleanup after
1825 * probe(), where things may be partially set up, as well as rmmod
1826 * cleanup after everything's been de-activated.
1830 device_remove_file(musb->controller, &dev_attr_mode);
1831 device_remove_file(musb->controller, &dev_attr_vbus);
1832 #ifdef CONFIG_USB_MUSB_OTG
1833 device_remove_file(musb->controller, &dev_attr_srp);
1837 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1838 musb_gadget_cleanup(musb);
1841 if (musb->nIrq >= 0) {
1842 disable_irq_wake(musb->nIrq);
1843 free_irq(musb->nIrq, musb);
1845 if (is_dma_capable() && musb->dma_controller) {
1846 struct dma_controller *c = musb->dma_controller;
1849 dma_controller_destroy(c);
1852 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
1853 musb_platform_exit(musb);
1854 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
1857 clk_disable(musb->clock);
1858 clk_put(musb->clock);
1861 #ifdef CONFIG_USB_MUSB_OTG
1862 put_device(musb->xceiv.dev);
1865 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1866 usb_put_hcd(musb_to_hcd(musb));
1873 * Perform generic per-controller initialization.
1875 * @pDevice: the controller (already clocked, etc)
1877 * @mregs: virtual address of controller registers,
1878 * not yet corrected for platform-specific offsets
1881 musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
1885 struct musb_hdrc_platform_data *plat = dev->platform_data;
1887 /* The driver might handle more features than the board; OK.
1888 * Fail when the board needs a feature that's not enabled.
1891 dev_dbg(dev, "no platform_data?\n");
1894 switch (plat->mode) {
1896 #ifdef CONFIG_USB_MUSB_HDRC_HCD
1901 case MUSB_PERIPHERAL:
1902 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
1908 #ifdef CONFIG_USB_MUSB_OTG
1914 dev_err(dev, "incompatible Kconfig role setting\n");
1919 musb = allocate_instance(dev, plat->config, ctrl);
1923 spin_lock_init(&musb->lock);
1924 musb->board_mode = plat->mode;
1925 musb->board_set_power = plat->set_power;
1926 musb->set_clock = plat->set_clock;
1927 musb->min_power = plat->min_power;
1929 /* Clock usage is chip-specific ... functional clock (DaVinci,
1930 * OMAP2430), or PHY ref (some TUSB6010 boards). All this core
1931 * code does is make sure a clock handle is available; platform
1932 * code manages it during start/stop and suspend/resume.
1935 musb->clock = clk_get(dev, plat->clock);
1936 if (IS_ERR(musb->clock)) {
1937 status = PTR_ERR(musb->clock);
1943 /* assume vbus is off */
1945 /* platform adjusts musb->mregs and musb->isr if needed,
1946 * and activates clocks
1948 musb->isr = generic_interrupt;
1949 status = musb_platform_init(musb);
1958 #ifndef CONFIG_MUSB_PIO_ONLY
1959 if (use_dma && dev->dma_mask) {
1960 struct dma_controller *c;
1962 c = dma_controller_create(musb, musb->mregs);
1963 musb->dma_controller = c;
1968 /* ideally this would be abstracted in platform setup */
1969 if (!is_dma_capable() || !musb->dma_controller)
1970 dev->dma_mask = NULL;
1972 /* be sure interrupts are disabled before connecting ISR */
1973 musb_platform_disable(musb);
1974 musb_generic_disable(musb);
1976 /* setup musb parts of the core (especially endpoints) */
1977 status = musb_core_init(plat->config->multipoint
1978 ? MUSB_CONTROLLER_MHDRC
1979 : MUSB_CONTROLLER_HDRC, musb);
1983 /* Init IRQ workqueue before request_irq */
1984 INIT_WORK(&musb->irq_work, musb_irq_work);
1986 /* attach to the IRQ */
1987 if (request_irq(nIrq, musb->isr, 0, dev->bus_id, musb)) {
1988 dev_err(dev, "request_irq %d failed!\n", nIrq);
1993 /* FIXME this handles wakeup irqs wrong */
1994 if (enable_irq_wake(nIrq) == 0)
1995 device_init_wakeup(dev, 1);
1997 pr_info("%s: USB %s mode controller at %p using %s, IRQ %d\n",
2000 switch (musb->board_mode) {
2001 case MUSB_HOST: s = "Host"; break;
2002 case MUSB_PERIPHERAL: s = "Peripheral"; break;
2003 default: s = "OTG"; break;
2006 (is_dma_capable() && musb->dma_controller)
2010 #ifdef CONFIG_USB_MUSB_HDRC_HCD
2011 /* host side needs more setup, except for no-host modes */
2012 if (musb->board_mode != MUSB_PERIPHERAL) {
2013 struct usb_hcd *hcd = musb_to_hcd(musb);
2015 if (musb->board_mode == MUSB_OTG)
2016 hcd->self.otg_port = 1;
2017 musb->xceiv.host = &hcd->self;
2018 hcd->power_budget = 2 * (plat->power ? : 250);
2020 #endif /* CONFIG_USB_MUSB_HDRC_HCD */
2022 /* For the host-only role, we can activate right away.
2023 * (We expect the ID pin to be forcibly grounded!!)
2024 * Otherwise, wait till the gadget driver hooks up.
2026 if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
2027 MUSB_HST_MODE(musb);
2028 musb->xceiv.default_a = 1;
2029 musb->xceiv.state = OTG_STATE_A_IDLE;
2031 status = usb_add_hcd(musb_to_hcd(musb), -1, 0);
2035 DBG(1, "%s mode, status %d, devctl %02x %c\n",
2037 musb_readb(musb->mregs, MUSB_DEVCTL),
2038 (musb_readb(musb->mregs, MUSB_DEVCTL)
2039 & MUSB_DEVCTL_BDEVICE
2042 } else /* peripheral is enabled */ {
2043 MUSB_DEV_MODE(musb);
2044 musb->xceiv.default_a = 0;
2045 musb->xceiv.state = OTG_STATE_B_IDLE;
2047 status = musb_gadget_setup(musb);
2051 DBG(1, "%s mode, status %d, dev%02x\n",
2052 is_otg_enabled(musb) ? "OTG" : "PERIPHERAL",
2054 musb_readb(musb->mregs, MUSB_DEVCTL));
2059 status = device_create_file(dev, &dev_attr_mode);
2060 status = device_create_file(dev, &dev_attr_vbus);
2061 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
2062 status = device_create_file(dev, &dev_attr_srp);
2063 #endif /* CONFIG_USB_GADGET_MUSB_HDRC */
2073 device_remove_file(musb->controller, &dev_attr_mode);
2074 device_remove_file(musb->controller, &dev_attr_vbus);
2075 #ifdef CONFIG_USB_MUSB_OTG
2076 device_remove_file(musb->controller, &dev_attr_srp);
2079 musb_platform_exit(musb);
2081 dev_err(musb->controller,
2082 "musb_init_controller failed with status %d\n", status);
2085 clk_put(musb->clock);
2086 device_init_wakeup(dev, 0);
2093 /*-------------------------------------------------------------------------*/
2095 /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just
2096 * bridge to a platform device; this driver then suffices.
2099 #ifndef CONFIG_MUSB_PIO_ONLY
2100 static u64 *orig_dma_mask;
2103 static int __init musb_probe(struct platform_device *pdev)
2105 struct device *dev = &pdev->dev;
2106 int irq = platform_get_irq(pdev, 0);
2107 struct resource *iomem;
2110 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2111 if (!iomem || irq == 0)
2114 base = ioremap(iomem->start, iomem->end - iomem->start + 1);
2116 dev_err(dev, "ioremap failed\n");
2120 #ifndef CONFIG_MUSB_PIO_ONLY
2121 /* clobbered by use_dma=n */
2122 orig_dma_mask = dev->dma_mask;
2124 return musb_init_controller(dev, irq, base);
2127 static int __devexit musb_remove(struct platform_device *pdev)
2129 struct musb *musb = dev_to_musb(&pdev->dev);
2130 void __iomem *ctrl_base = musb->ctrl_base;
2132 /* this gets called on rmmod.
2133 * - Host mode: host may still be active
2134 * - Peripheral mode: peripheral is deactivated (or never-activated)
2135 * - OTG mode: both roles are deactivated (or never-activated)
2137 musb_shutdown(pdev);
2138 #ifdef CONFIG_USB_MUSB_HDRC_HCD
2139 if (musb->board_mode == MUSB_HOST)
2140 usb_remove_hcd(musb_to_hcd(musb));
2144 device_init_wakeup(&pdev->dev, 0);
2145 #ifndef CONFIG_MUSB_PIO_ONLY
2146 pdev->dev.dma_mask = orig_dma_mask;
2153 static int musb_suspend(struct platform_device *pdev, pm_message_t message)
2155 unsigned long flags;
2156 struct musb *musb = dev_to_musb(&pdev->dev);
2161 spin_lock_irqsave(&musb->lock, flags);
2163 if (is_peripheral_active(musb)) {
2164 /* FIXME force disconnect unless we know USB will wake
2165 * the system up quickly enough to respond ...
2167 } else if (is_host_active(musb)) {
2168 /* we know all the children are suspended; sometimes
2169 * they will even be wakeup-enabled.
2173 if (musb->set_clock)
2174 musb->set_clock(musb->clock, 0);
2176 clk_disable(musb->clock);
2177 spin_unlock_irqrestore(&musb->lock, flags);
2181 static int musb_resume(struct platform_device *pdev)
2183 unsigned long flags;
2184 struct musb *musb = dev_to_musb(&pdev->dev);
2189 spin_lock_irqsave(&musb->lock, flags);
2191 if (musb->set_clock)
2192 musb->set_clock(musb->clock, 1);
2194 clk_enable(musb->clock);
2196 /* for static cmos like DaVinci, register values were preserved
2197 * unless for some reason the whole soc powered down and we're
2198 * not treating that as a whole-system restart (e.g. swsusp)
2200 spin_unlock_irqrestore(&musb->lock, flags);
2205 #define musb_suspend NULL
2206 #define musb_resume NULL
2209 static struct platform_driver musb_driver = {
2211 .name = (char *)musb_driver_name,
2212 .bus = &platform_bus_type,
2213 .owner = THIS_MODULE,
2215 .remove = __devexit_p(musb_remove),
2216 .shutdown = musb_shutdown,
2217 .suspend = musb_suspend,
2218 .resume = musb_resume,
2221 /*-------------------------------------------------------------------------*/
2223 static int __init musb_init(void)
2225 #ifdef CONFIG_USB_MUSB_HDRC_HCD
2230 pr_info("%s: version " MUSB_VERSION ", "
2231 #ifdef CONFIG_MUSB_PIO_ONLY
2233 #elif defined(CONFIG_USB_TI_CPPI_DMA)
2235 #elif defined(CONFIG_USB_INVENTRA_DMA)
2237 #elif defined(CONFIG_USB_TUSB_OMAP_DMA)
2243 #ifdef CONFIG_USB_MUSB_OTG
2244 "otg (peripheral+host)"
2245 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
2247 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
2251 musb_driver_name, musb_debug);
2252 return platform_driver_probe(&musb_driver, musb_probe);
2255 /* make us init after usbcore and before usb
2256 * gadget and host-side drivers start to register
2258 subsys_initcall(musb_init);
2260 static void __exit musb_cleanup(void)
2262 platform_driver_unregister(&musb_driver);
2264 module_exit(musb_cleanup);