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.
93 #include <linux/module.h>
94 #include <linux/kernel.h>
95 #include <linux/sched.h>
96 #include <linux/slab.h>
97 #include <linux/init.h>
98 #include <linux/list.h>
99 #include <linux/kobject.h>
100 #include <linux/prefetch.h>
101 #include <linux/platform_device.h>
102 #include <linux/io.h>
106 #include <asm/errno.h>
107 #include <linux/usb/ch9.h>
108 #include <linux/usb/gadget.h>
109 #include <linux/usb/musb.h>
111 #include "linux-compat.h"
112 #include "usb-compat.h"
115 #include "musb_core.h"
117 #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
120 #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
121 #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"
123 #define MUSB_VERSION "6.0"
125 #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION
127 #define MUSB_DRIVER_NAME "musb-hdrc"
128 const char musb_driver_name[] = MUSB_DRIVER_NAME;
130 MODULE_DESCRIPTION(DRIVER_INFO);
131 MODULE_AUTHOR(DRIVER_AUTHOR);
132 MODULE_LICENSE("GPL");
133 MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
137 /*-------------------------------------------------------------------------*/
139 static inline struct musb *dev_to_musb(struct device *dev)
141 return dev_get_drvdata(dev);
145 /*-------------------------------------------------------------------------*/
148 #ifndef CONFIG_BLACKFIN
149 static int musb_ulpi_read(struct usb_phy *phy, u32 offset)
151 void __iomem *addr = phy->io_priv;
157 pm_runtime_get_sync(phy->io_dev);
159 /* Make sure the transceiver is not in low power mode */
160 power = musb_readb(addr, MUSB_POWER);
161 power &= ~MUSB_POWER_SUSPENDM;
162 musb_writeb(addr, MUSB_POWER, power);
164 /* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the
165 * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
168 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
169 musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
170 MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
172 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
173 & MUSB_ULPI_REG_CMPLT)) {
181 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
182 r &= ~MUSB_ULPI_REG_CMPLT;
183 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
185 ret = musb_readb(addr, MUSB_ULPI_REG_DATA);
188 pm_runtime_put(phy->io_dev);
193 static int musb_ulpi_write(struct usb_phy *phy, u32 offset, u32 data)
195 void __iomem *addr = phy->io_priv;
201 pm_runtime_get_sync(phy->io_dev);
203 /* Make sure the transceiver is not in low power mode */
204 power = musb_readb(addr, MUSB_POWER);
205 power &= ~MUSB_POWER_SUSPENDM;
206 musb_writeb(addr, MUSB_POWER, power);
208 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
209 musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data);
210 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
212 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
213 & MUSB_ULPI_REG_CMPLT)) {
221 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
222 r &= ~MUSB_ULPI_REG_CMPLT;
223 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
226 pm_runtime_put(phy->io_dev);
231 #define musb_ulpi_read NULL
232 #define musb_ulpi_write NULL
235 static struct usb_phy_io_ops musb_ulpi_access = {
236 .read = musb_ulpi_read,
237 .write = musb_ulpi_write,
241 /*-------------------------------------------------------------------------*/
243 #if !defined(CONFIG_USB_MUSB_TUSB6010) && !defined(CONFIG_USB_MUSB_BLACKFIN)
246 * Load an endpoint's FIFO
248 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
250 struct musb *musb = hw_ep->musb;
251 void __iomem *fifo = hw_ep->fifo;
255 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
256 'T', hw_ep->epnum, fifo, len, src);
258 /* we can't assume unaligned reads work */
259 if (likely((0x01 & (unsigned long) src) == 0)) {
262 /* best case is 32bit-aligned source address */
263 if ((0x02 & (unsigned long) src) == 0) {
265 writesl(fifo, src + index, len >> 2);
266 index += len & ~0x03;
269 musb_writew(fifo, 0, *(u16 *)&src[index]);
274 writesw(fifo, src + index, len >> 1);
275 index += len & ~0x01;
279 musb_writeb(fifo, 0, src[index]);
282 writesb(fifo, src, len);
286 #if !defined(CONFIG_USB_MUSB_AM35X)
288 * Unload an endpoint's FIFO
290 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
292 struct musb *musb = hw_ep->musb;
293 void __iomem *fifo = hw_ep->fifo;
295 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
296 'R', hw_ep->epnum, fifo, len, dst);
298 /* we can't assume unaligned writes work */
299 if (likely((0x01 & (unsigned long) dst) == 0)) {
302 /* best case is 32bit-aligned destination address */
303 if ((0x02 & (unsigned long) dst) == 0) {
305 readsl(fifo, dst, len >> 2);
309 *(u16 *)&dst[index] = musb_readw(fifo, 0);
314 readsw(fifo, dst, len >> 1);
319 dst[index] = musb_readb(fifo, 0);
322 readsb(fifo, dst, len);
327 #endif /* normal PIO */
330 /*-------------------------------------------------------------------------*/
332 /* for high speed test mode; see USB 2.0 spec 7.1.20 */
333 static const u8 musb_test_packet[53] = {
334 /* implicit SYNC then DATA0 to start */
337 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
339 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
341 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee,
342 /* JJJJJJJKKKKKKK x8 */
343 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
345 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd,
346 /* JKKKKKKK x10, JK */
347 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e
349 /* implicit CRC16 then EOP to end */
352 void musb_load_testpacket(struct musb *musb)
354 void __iomem *regs = musb->endpoints[0].regs;
356 musb_ep_select(musb->mregs, 0);
357 musb_write_fifo(musb->control_ep,
358 sizeof(musb_test_packet), musb_test_packet);
359 musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY);
363 /*-------------------------------------------------------------------------*/
366 * Handles OTG hnp timeouts, such as b_ase0_brst
368 void musb_otg_timer_func(unsigned long data)
370 struct musb *musb = (struct musb *)data;
373 spin_lock_irqsave(&musb->lock, flags);
374 switch (musb->xceiv->state) {
375 case OTG_STATE_B_WAIT_ACON:
376 dev_dbg(musb->controller, "HNP: b_wait_acon timeout; back to b_peripheral\n");
377 musb_g_disconnect(musb);
378 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
381 case OTG_STATE_A_SUSPEND:
382 case OTG_STATE_A_WAIT_BCON:
383 dev_dbg(musb->controller, "HNP: %s timeout\n",
384 otg_state_string(musb->xceiv->state));
385 musb_platform_set_vbus(musb, 0);
386 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
389 dev_dbg(musb->controller, "HNP: Unhandled mode %s\n",
390 otg_state_string(musb->xceiv->state));
392 musb->ignore_disconnect = 0;
393 spin_unlock_irqrestore(&musb->lock, flags);
397 * Stops the HNP transition. Caller must take care of locking.
399 void musb_hnp_stop(struct musb *musb)
401 struct usb_hcd *hcd = musb_to_hcd(musb);
402 void __iomem *mbase = musb->mregs;
405 dev_dbg(musb->controller, "HNP: stop from %s\n", otg_state_string(musb->xceiv->state));
407 switch (musb->xceiv->state) {
408 case OTG_STATE_A_PERIPHERAL:
409 musb_g_disconnect(musb);
410 dev_dbg(musb->controller, "HNP: back to %s\n",
411 otg_state_string(musb->xceiv->state));
413 case OTG_STATE_B_HOST:
414 dev_dbg(musb->controller, "HNP: Disabling HR\n");
415 hcd->self.is_b_host = 0;
416 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
418 reg = musb_readb(mbase, MUSB_POWER);
419 reg |= MUSB_POWER_SUSPENDM;
420 musb_writeb(mbase, MUSB_POWER, reg);
421 /* REVISIT: Start SESSION_REQUEST here? */
424 dev_dbg(musb->controller, "HNP: Stopping in unknown state %s\n",
425 otg_state_string(musb->xceiv->state));
429 * When returning to A state after HNP, avoid hub_port_rebounce(),
430 * which cause occasional OPT A "Did not receive reset after connect"
433 musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16);
438 * Interrupt Service Routine to record USB "global" interrupts.
439 * Since these do not happen often and signify things of
440 * paramount importance, it seems OK to check them individually;
441 * the order of the tests is specified in the manual
443 * @param musb instance pointer
444 * @param int_usb register contents
449 static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
453 struct usb_otg *otg = musb->xceiv->otg;
455 irqreturn_t handled = IRQ_NONE;
457 dev_dbg(musb->controller, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
461 /* in host mode, the peripheral may issue remote wakeup.
462 * in peripheral mode, the host may resume the link.
463 * spurious RESUME irqs happen too, paired with SUSPEND.
465 if (int_usb & MUSB_INTR_RESUME) {
466 handled = IRQ_HANDLED;
467 dev_dbg(musb->controller, "RESUME (%s)\n", otg_state_string(musb->xceiv->state));
469 if (devctl & MUSB_DEVCTL_HM) {
470 void __iomem *mbase = musb->mregs;
472 switch (musb->xceiv->state) {
473 case OTG_STATE_A_SUSPEND:
474 /* remote wakeup? later, GetPortStatus
475 * will stop RESUME signaling
478 if (power & MUSB_POWER_SUSPENDM) {
480 musb->int_usb &= ~MUSB_INTR_SUSPEND;
481 dev_dbg(musb->controller, "Spurious SUSPENDM\n");
485 power &= ~MUSB_POWER_SUSPENDM;
486 musb_writeb(mbase, MUSB_POWER,
487 power | MUSB_POWER_RESUME);
489 musb->port1_status |=
490 (USB_PORT_STAT_C_SUSPEND << 16)
491 | MUSB_PORT_STAT_RESUME;
492 musb->rh_timer = jiffies
493 + msecs_to_jiffies(20);
495 musb->xceiv->state = OTG_STATE_A_HOST;
497 usb_hcd_resume_root_hub(musb_to_hcd(musb));
499 case OTG_STATE_B_WAIT_ACON:
500 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
505 WARNING("bogus %s RESUME (%s)\n",
507 otg_state_string(musb->xceiv->state));
510 switch (musb->xceiv->state) {
511 case OTG_STATE_A_SUSPEND:
512 /* possibly DISCONNECT is upcoming */
513 musb->xceiv->state = OTG_STATE_A_HOST;
514 usb_hcd_resume_root_hub(musb_to_hcd(musb));
516 case OTG_STATE_B_WAIT_ACON:
517 case OTG_STATE_B_PERIPHERAL:
518 /* disconnect while suspended? we may
519 * not get a disconnect irq...
521 if ((devctl & MUSB_DEVCTL_VBUS)
522 != (3 << MUSB_DEVCTL_VBUS_SHIFT)
524 musb->int_usb |= MUSB_INTR_DISCONNECT;
525 musb->int_usb &= ~MUSB_INTR_SUSPEND;
530 case OTG_STATE_B_IDLE:
531 musb->int_usb &= ~MUSB_INTR_SUSPEND;
534 WARNING("bogus %s RESUME (%s)\n",
536 otg_state_string(musb->xceiv->state));
541 /* see manual for the order of the tests */
542 if (int_usb & MUSB_INTR_SESSREQ) {
543 void __iomem *mbase = musb->mregs;
545 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS
546 && (devctl & MUSB_DEVCTL_BDEVICE)) {
547 dev_dbg(musb->controller, "SessReq while on B state\n");
551 dev_dbg(musb->controller, "SESSION_REQUEST (%s)\n",
552 otg_state_string(musb->xceiv->state));
554 /* IRQ arrives from ID pin sense or (later, if VBUS power
555 * is removed) SRP. responses are time critical:
556 * - turn on VBUS (with silicon-specific mechanism)
557 * - go through A_WAIT_VRISE
558 * - ... to A_WAIT_BCON.
559 * a_wait_vrise_tmout triggers VBUS_ERROR transitions
561 musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
562 musb->ep0_stage = MUSB_EP0_START;
563 musb->xceiv->state = OTG_STATE_A_IDLE;
565 musb_platform_set_vbus(musb, 1);
567 handled = IRQ_HANDLED;
570 if (int_usb & MUSB_INTR_VBUSERROR) {
573 /* During connection as an A-Device, we may see a short
574 * current spikes causing voltage drop, because of cable
575 * and peripheral capacitance combined with vbus draw.
576 * (So: less common with truly self-powered devices, where
577 * vbus doesn't act like a power supply.)
579 * Such spikes are short; usually less than ~500 usec, max
580 * of ~2 msec. That is, they're not sustained overcurrent
581 * errors, though they're reported using VBUSERROR irqs.
583 * Workarounds: (a) hardware: use self powered devices.
584 * (b) software: ignore non-repeated VBUS errors.
586 * REVISIT: do delays from lots of DEBUG_KERNEL checks
587 * make trouble here, keeping VBUS < 4.4V ?
589 switch (musb->xceiv->state) {
590 case OTG_STATE_A_HOST:
591 /* recovery is dicey once we've gotten past the
592 * initial stages of enumeration, but if VBUS
593 * stayed ok at the other end of the link, and
594 * another reset is due (at least for high speed,
595 * to redo the chirp etc), it might work OK...
597 case OTG_STATE_A_WAIT_BCON:
598 case OTG_STATE_A_WAIT_VRISE:
599 if (musb->vbuserr_retry) {
600 void __iomem *mbase = musb->mregs;
602 musb->vbuserr_retry--;
604 devctl |= MUSB_DEVCTL_SESSION;
605 musb_writeb(mbase, MUSB_DEVCTL, devctl);
607 musb->port1_status |=
608 USB_PORT_STAT_OVERCURRENT
609 | (USB_PORT_STAT_C_OVERCURRENT << 16);
616 dev_dbg(musb->controller, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
617 otg_state_string(musb->xceiv->state),
620 switch (devctl & MUSB_DEVCTL_VBUS) {
621 case 0 << MUSB_DEVCTL_VBUS_SHIFT:
622 s = "<SessEnd"; break;
623 case 1 << MUSB_DEVCTL_VBUS_SHIFT:
624 s = "<AValid"; break;
625 case 2 << MUSB_DEVCTL_VBUS_SHIFT:
626 s = "<VBusValid"; break;
627 /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */
631 VBUSERR_RETRY_COUNT - musb->vbuserr_retry,
634 /* go through A_WAIT_VFALL then start a new session */
636 musb_platform_set_vbus(musb, 0);
637 handled = IRQ_HANDLED;
640 if (int_usb & MUSB_INTR_SUSPEND) {
641 dev_dbg(musb->controller, "SUSPEND (%s) devctl %02x power %02x\n",
642 otg_state_string(musb->xceiv->state), devctl, power);
643 handled = IRQ_HANDLED;
645 switch (musb->xceiv->state) {
646 case OTG_STATE_A_PERIPHERAL:
647 /* We also come here if the cable is removed, since
648 * this silicon doesn't report ID-no-longer-grounded.
650 * We depend on T(a_wait_bcon) to shut us down, and
651 * hope users don't do anything dicey during this
652 * undesired detour through A_WAIT_BCON.
655 usb_hcd_resume_root_hub(musb_to_hcd(musb));
656 musb_root_disconnect(musb);
657 musb_platform_try_idle(musb, jiffies
658 + msecs_to_jiffies(musb->a_wait_bcon
659 ? : OTG_TIME_A_WAIT_BCON));
662 case OTG_STATE_B_IDLE:
663 if (!musb->is_active)
665 case OTG_STATE_B_PERIPHERAL:
666 musb_g_suspend(musb);
667 musb->is_active = is_otg_enabled(musb)
668 && otg->gadget->b_hnp_enable;
669 if (musb->is_active) {
670 musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
671 dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n");
672 mod_timer(&musb->otg_timer, jiffies
674 OTG_TIME_B_ASE0_BRST));
677 case OTG_STATE_A_WAIT_BCON:
678 if (musb->a_wait_bcon != 0)
679 musb_platform_try_idle(musb, jiffies
680 + msecs_to_jiffies(musb->a_wait_bcon));
682 case OTG_STATE_A_HOST:
683 musb->xceiv->state = OTG_STATE_A_SUSPEND;
684 musb->is_active = is_otg_enabled(musb)
685 && otg->host->b_hnp_enable;
687 case OTG_STATE_B_HOST:
688 /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
689 dev_dbg(musb->controller, "REVISIT: SUSPEND as B_HOST\n");
692 /* "should not happen" */
699 if (int_usb & MUSB_INTR_CONNECT) {
700 struct usb_hcd *hcd = musb_to_hcd(musb);
702 handled = IRQ_HANDLED;
705 musb->ep0_stage = MUSB_EP0_START;
707 /* flush endpoints when transitioning from Device Mode */
708 if (is_peripheral_active(musb)) {
709 /* REVISIT HNP; just force disconnect */
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);
715 musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED
716 |USB_PORT_STAT_HIGH_SPEED
717 |USB_PORT_STAT_ENABLE
719 musb->port1_status |= USB_PORT_STAT_CONNECTION
720 |(USB_PORT_STAT_C_CONNECTION << 16);
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;
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 dev_dbg(musb->controller, "HNP: SUSPEND+CONNECT, now b_host\n");
731 int_usb &= ~MUSB_INTR_SUSPEND;
734 dev_dbg(musb->controller, "CONNECT as b_peripheral???\n");
736 case OTG_STATE_B_WAIT_ACON:
737 dev_dbg(musb->controller, "HNP: CONNECT, now b_host\n");
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);
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;
753 /* poke the root hub */
756 usb_hcd_poll_rh_status(hcd);
758 usb_hcd_resume_root_hub(hcd);
760 dev_dbg(musb->controller, "CONNECT (%s) devctl %02x\n",
761 otg_state_string(musb->xceiv->state), devctl);
766 if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
767 dev_dbg(musb->controller, "DISCONNECT (%s) as %s, devctl %02x\n",
768 otg_state_string(musb->xceiv->state),
769 MUSB_MODE(musb), devctl);
770 handled = IRQ_HANDLED;
772 switch (musb->xceiv->state) {
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));
781 case OTG_STATE_B_HOST:
782 /* REVISIT this behaves for "real disconnect"
783 * cases; make sure the other transitions from
784 * from B_HOST act right too. The B_HOST code
785 * in hnp_stop() is currently not used...
787 musb_root_disconnect(musb);
788 musb_to_hcd(musb)->self.is_b_host = 0;
789 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
791 musb_g_disconnect(musb);
793 case OTG_STATE_A_PERIPHERAL:
795 musb_root_disconnect(musb);
797 case OTG_STATE_B_WAIT_ACON:
799 case OTG_STATE_B_PERIPHERAL:
800 case OTG_STATE_B_IDLE:
801 musb_g_disconnect(musb);
804 WARNING("unhandled DISCONNECT transition (%s)\n",
805 otg_state_string(musb->xceiv->state));
810 /* mentor saves a bit: bus reset and babble share the same irq.
811 * only host sees babble; only peripheral sees bus reset.
813 if (int_usb & MUSB_INTR_RESET) {
814 handled = IRQ_HANDLED;
815 if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) {
817 * Looks like non-HS BABBLE can be ignored, but
818 * HS BABBLE is an error condition. For HS the solution
819 * is to avoid babble in the first place and fix what
820 * caused BABBLE. When HS BABBLE happens we can only
823 if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
824 dev_dbg(musb->controller, "BABBLE devctl: %02x\n", devctl);
826 ERR("Stopping host session -- babble\n");
827 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
829 } else if (is_peripheral_capable()) {
830 dev_dbg(musb->controller, "BUS RESET as %s\n",
831 otg_state_string(musb->xceiv->state));
832 switch (musb->xceiv->state) {
833 case OTG_STATE_A_SUSPEND:
834 /* We need to ignore disconnect on suspend
835 * otherwise tusb 2.0 won't reconnect after a
836 * power cycle, which breaks otg compliance.
838 musb->ignore_disconnect = 1;
841 case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */
842 /* never use invalid T(a_wait_bcon) */
843 dev_dbg(musb->controller, "HNP: in %s, %d msec timeout\n",
844 otg_state_string(musb->xceiv->state),
846 mod_timer(&musb->otg_timer, jiffies
847 + msecs_to_jiffies(TA_WAIT_BCON(musb)));
849 case OTG_STATE_A_PERIPHERAL:
850 musb->ignore_disconnect = 0;
851 del_timer(&musb->otg_timer);
854 case OTG_STATE_B_WAIT_ACON:
855 dev_dbg(musb->controller, "HNP: RESET (%s), to b_peripheral\n",
856 otg_state_string(musb->xceiv->state));
857 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
860 case OTG_STATE_B_IDLE:
861 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
863 case OTG_STATE_B_PERIPHERAL:
867 dev_dbg(musb->controller, "Unhandled BUS RESET as %s\n",
868 otg_state_string(musb->xceiv->state));
875 /* REVISIT ... this would be for multiplexing periodic endpoints, or
876 * supporting transfer phasing to prevent exceeding ISO bandwidth
877 * limits of a given frame or microframe.
879 * It's not needed for peripheral side, which dedicates endpoints;
880 * though it _might_ use SOF irqs for other purposes.
882 * And it's not currently needed for host side, which also dedicates
883 * endpoints, relies on TX/RX interval registers, and isn't claimed
884 * to support ISO transfers yet.
886 if (int_usb & MUSB_INTR_SOF) {
887 void __iomem *mbase = musb->mregs;
888 struct musb_hw_ep *ep;
892 dev_dbg(musb->controller, "START_OF_FRAME\n");
893 handled = IRQ_HANDLED;
895 /* start any periodic Tx transfers waiting for current frame */
896 frame = musb_readw(mbase, MUSB_FRAME);
897 ep = musb->endpoints;
898 for (epnum = 1; (epnum < musb->nr_endpoints)
899 && (musb->epmask >= (1 << epnum));
902 * FIXME handle framecounter wraps (12 bits)
903 * eliminate duplicated StartUrb logic
905 if (ep->dwWaitFrame >= frame) {
907 pr_debug("SOF --> periodic TX%s on %d\n",
908 ep->tx_channel ? " DMA" : "",
911 musb_h_tx_start(musb, epnum);
913 cppi_hostdma_start(musb, epnum);
915 } /* end of for loop */
919 schedule_work(&musb->irq_work);
924 /*-------------------------------------------------------------------------*/
927 * Program the HDRC to start (enable interrupts, dma, etc.).
930 void musb_start(struct musb *musb)
932 int musb_start(struct musb *musb)
935 void __iomem *regs = musb->mregs;
936 u8 devctl = musb_readb(regs, MUSB_DEVCTL);
941 dev_dbg(musb->controller, "<== devctl %02x\n", devctl);
943 /* Set INT enable registers, enable interrupts */
944 musb_writew(regs, MUSB_INTRTXE, musb->epmask);
945 musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe);
946 musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
948 musb_writeb(regs, MUSB_TESTMODE, 0);
950 /* put into basic highspeed mode and start session */
951 musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
953 /* ENSUSPEND wedges tusb */
954 /* | MUSB_POWER_ENSUSPEND */
958 devctl = musb_readb(regs, MUSB_DEVCTL);
959 devctl &= ~MUSB_DEVCTL_SESSION;
961 if (is_otg_enabled(musb)) {
963 /* session started after:
964 * (a) ID-grounded irq, host mode;
965 * (b) vbus present/connect IRQ, peripheral mode;
966 * (c) peripheral initiates, using SRP
968 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
971 devctl |= MUSB_DEVCTL_SESSION;
974 } else if (is_host_enabled(musb)) {
975 /* assume ID pin is hard-wired to ground */
976 devctl |= MUSB_DEVCTL_SESSION;
978 } else /* peripheral is enabled */ {
979 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
984 musb_platform_enable(musb);
986 ret = musb_platform_enable(musb);
992 musb_writeb(regs, MUSB_DEVCTL, devctl);
1000 static void musb_generic_disable(struct musb *musb)
1002 void __iomem *mbase = musb->mregs;
1005 /* disable interrupts */
1006 musb_writeb(mbase, MUSB_INTRUSBE, 0);
1007 musb_writew(mbase, MUSB_INTRTXE, 0);
1008 musb_writew(mbase, MUSB_INTRRXE, 0);
1011 musb_writeb(mbase, MUSB_DEVCTL, 0);
1013 /* flush pending interrupts */
1014 temp = musb_readb(mbase, MUSB_INTRUSB);
1015 temp = musb_readw(mbase, MUSB_INTRTX);
1016 temp = musb_readw(mbase, MUSB_INTRRX);
1021 * Make the HDRC stop (disable interrupts, etc.);
1022 * reversible by musb_start
1023 * called on gadget driver unregister
1024 * with controller locked, irqs blocked
1025 * acts as a NOP unless some role activated the hardware
1027 void musb_stop(struct musb *musb)
1029 /* stop IRQs, timers, ... */
1030 musb_platform_disable(musb);
1031 musb_generic_disable(musb);
1032 dev_dbg(musb->controller, "HDRC disabled\n");
1035 * - mark host and/or peripheral drivers unusable/inactive
1036 * - disable DMA (and enable it in HdrcStart)
1037 * - make sure we can musb_start() after musb_stop(); with
1038 * OTG mode, gadget driver module rmmod/modprobe cycles that
1041 musb_platform_try_idle(musb, 0);
1045 static void musb_shutdown(struct platform_device *pdev)
1047 struct musb *musb = dev_to_musb(&pdev->dev);
1048 unsigned long flags;
1050 pm_runtime_get_sync(musb->controller);
1052 musb_gadget_cleanup(musb);
1054 spin_lock_irqsave(&musb->lock, flags);
1055 musb_platform_disable(musb);
1056 musb_generic_disable(musb);
1057 spin_unlock_irqrestore(&musb->lock, flags);
1059 if (!is_otg_enabled(musb) && is_host_enabled(musb))
1060 usb_remove_hcd(musb_to_hcd(musb));
1061 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
1062 musb_platform_exit(musb);
1064 pm_runtime_put(musb->controller);
1065 /* FIXME power down */
1070 /*-------------------------------------------------------------------------*/
1073 * The silicon either has hard-wired endpoint configurations, or else
1074 * "dynamic fifo" sizing. The driver has support for both, though at this
1075 * writing only the dynamic sizing is very well tested. Since we switched
1076 * away from compile-time hardware parameters, we can no longer rely on
1077 * dead code elimination to leave only the relevant one in the object file.
1079 * We don't currently use dynamic fifo setup capability to do anything
1080 * more than selecting one of a bunch of predefined configurations.
1082 #if defined(CONFIG_USB_MUSB_TUSB6010) \
1083 || defined(CONFIG_USB_MUSB_TUSB6010_MODULE) \
1084 || defined(CONFIG_USB_MUSB_OMAP2PLUS) \
1085 || defined(CONFIG_USB_MUSB_OMAP2PLUS_MODULE) \
1086 || defined(CONFIG_USB_MUSB_AM35X) \
1087 || defined(CONFIG_USB_MUSB_AM35X_MODULE) \
1088 || defined(CONFIG_USB_MUSB_DSPS) \
1089 || defined(CONFIG_USB_MUSB_DSPS_MODULE)
1090 static ushort __devinitdata fifo_mode = 4;
1091 #elif defined(CONFIG_USB_MUSB_UX500) \
1092 || defined(CONFIG_USB_MUSB_UX500_MODULE)
1093 static ushort __devinitdata fifo_mode = 5;
1095 static ushort __devinitdata fifo_mode = 2;
1098 /* "modprobe ... fifo_mode=1" etc */
1099 module_param(fifo_mode, ushort, 0);
1100 MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration");
1103 * tables defining fifo_mode values. define more if you like.
1104 * for host side, make sure both halves of ep1 are set up.
1107 /* mode 0 - fits in 2KB */
1108 static struct musb_fifo_cfg __devinitdata mode_0_cfg[] = {
1109 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1110 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1111 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, },
1112 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1113 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1116 /* mode 1 - fits in 4KB */
1117 static struct musb_fifo_cfg __devinitdata mode_1_cfg[] = {
1118 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1119 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1120 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1121 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1122 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1125 /* mode 2 - fits in 4KB */
1126 static struct musb_fifo_cfg __devinitdata mode_2_cfg[] = {
1127 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1128 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1129 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1130 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1131 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1132 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1135 /* mode 3 - fits in 4KB */
1136 static struct musb_fifo_cfg __devinitdata mode_3_cfg[] = {
1137 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1138 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1139 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1140 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1141 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1142 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1145 /* mode 4 - fits in 16KB */
1146 static struct musb_fifo_cfg __devinitdata mode_4_cfg[] = {
1147 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1148 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1149 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1150 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1151 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1152 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1153 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1154 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1155 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1156 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1157 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, },
1158 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, },
1159 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
1160 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, },
1161 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, },
1162 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, },
1163 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, },
1164 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, },
1165 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, },
1166 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, },
1167 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, },
1168 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, },
1169 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, },
1170 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, },
1171 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
1172 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1173 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1176 /* mode 5 - fits in 8KB */
1177 static struct musb_fifo_cfg __devinitdata mode_5_cfg[] = {
1178 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1179 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1180 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1181 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1182 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1183 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1184 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1185 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1186 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1187 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1188 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 32, },
1189 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 32, },
1190 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 32, },
1191 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 32, },
1192 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 32, },
1193 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 32, },
1194 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 32, },
1195 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 32, },
1196 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 32, },
1197 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 32, },
1198 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 32, },
1199 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 32, },
1200 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 32, },
1201 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 32, },
1202 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, },
1203 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1204 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1208 * configure a fifo; for non-shared endpoints, this may be called
1209 * once for a tx fifo and once for an rx fifo.
1211 * returns negative errno or offset for next fifo.
1213 static int __devinit
1214 fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep,
1215 const struct musb_fifo_cfg *cfg, u16 offset)
1217 void __iomem *mbase = musb->mregs;
1219 u16 maxpacket = cfg->maxpacket;
1220 u16 c_off = offset >> 3;
1223 /* expect hw_ep has already been zero-initialized */
1225 size = ffs(max(maxpacket, (u16) 8)) - 1;
1226 maxpacket = 1 << size;
1229 if (cfg->mode == BUF_DOUBLE) {
1230 if ((offset + (maxpacket << 1)) >
1231 (1 << (musb->config->ram_bits + 2)))
1233 c_size |= MUSB_FIFOSZ_DPB;
1235 if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2)))
1239 /* configure the FIFO */
1240 musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum);
1242 /* EP0 reserved endpoint for control, bidirectional;
1243 * EP1 reserved for bulk, two unidirection halves.
1245 if (hw_ep->epnum == 1)
1246 musb->bulk_ep = hw_ep;
1247 /* REVISIT error check: be sure ep0 can both rx and tx ... */
1248 switch (cfg->style) {
1250 musb_write_txfifosz(mbase, c_size);
1251 musb_write_txfifoadd(mbase, c_off);
1252 hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1253 hw_ep->max_packet_sz_tx = maxpacket;
1256 musb_write_rxfifosz(mbase, c_size);
1257 musb_write_rxfifoadd(mbase, c_off);
1258 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1259 hw_ep->max_packet_sz_rx = maxpacket;
1262 musb_write_txfifosz(mbase, c_size);
1263 musb_write_txfifoadd(mbase, c_off);
1264 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1265 hw_ep->max_packet_sz_rx = maxpacket;
1267 musb_write_rxfifosz(mbase, c_size);
1268 musb_write_rxfifoadd(mbase, c_off);
1269 hw_ep->tx_double_buffered = hw_ep->rx_double_buffered;
1270 hw_ep->max_packet_sz_tx = maxpacket;
1272 hw_ep->is_shared_fifo = true;
1276 /* NOTE rx and tx endpoint irqs aren't managed separately,
1277 * which happens to be ok
1279 musb->epmask |= (1 << hw_ep->epnum);
1281 return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0));
1284 static struct musb_fifo_cfg __devinitdata ep0_cfg = {
1285 .style = FIFO_RXTX, .maxpacket = 64,
1288 static int __devinit ep_config_from_table(struct musb *musb)
1290 const struct musb_fifo_cfg *cfg;
1293 struct musb_hw_ep *hw_ep = musb->endpoints;
1295 if (musb->config->fifo_cfg) {
1296 cfg = musb->config->fifo_cfg;
1297 n = musb->config->fifo_cfg_size;
1301 switch (fifo_mode) {
1307 n = ARRAY_SIZE(mode_0_cfg);
1311 n = ARRAY_SIZE(mode_1_cfg);
1315 n = ARRAY_SIZE(mode_2_cfg);
1319 n = ARRAY_SIZE(mode_3_cfg);
1323 n = ARRAY_SIZE(mode_4_cfg);
1327 n = ARRAY_SIZE(mode_5_cfg);
1331 pr_debug("%s: setup fifo_mode %d\n", musb_driver_name, fifo_mode);
1334 offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0);
1335 /* assert(offset > 0) */
1337 /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would
1338 * be better than static musb->config->num_eps and DYN_FIFO_SIZE...
1341 for (i = 0; i < n; i++) {
1342 u8 epn = cfg->hw_ep_num;
1344 if (epn >= musb->config->num_eps) {
1345 pr_debug("%s: invalid ep %d\n",
1346 musb_driver_name, epn);
1349 offset = fifo_setup(musb, hw_ep + epn, cfg++, offset);
1351 pr_debug("%s: mem overrun, ep %d\n",
1352 musb_driver_name, epn);
1356 musb->nr_endpoints = max(epn, musb->nr_endpoints);
1359 pr_debug("%s: %d/%d max ep, %d/%d memory\n", musb_driver_name, n + 1,
1360 musb->config->num_eps * 2 - 1, offset,
1361 (1 << (musb->config->ram_bits + 2)));
1363 if (!musb->bulk_ep) {
1364 pr_debug("%s: missing bulk\n", musb_driver_name);
1373 * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false
1374 * @param musb the controller
1376 static int __devinit ep_config_from_hw(struct musb *musb)
1379 struct musb_hw_ep *hw_ep;
1380 void *mbase = musb->mregs;
1383 dev_dbg(musb->controller, "<== static silicon ep config\n");
1385 /* FIXME pick up ep0 maxpacket size */
1387 for (epnum = 1; epnum < musb->config->num_eps; epnum++) {
1388 musb_ep_select(mbase, epnum);
1389 hw_ep = musb->endpoints + epnum;
1391 ret = musb_read_fifosize(musb, hw_ep, epnum);
1395 /* FIXME set up hw_ep->{rx,tx}_double_buffered */
1397 /* pick an RX/TX endpoint for bulk */
1398 if (hw_ep->max_packet_sz_tx < 512
1399 || hw_ep->max_packet_sz_rx < 512)
1402 /* REVISIT: this algorithm is lazy, we should at least
1403 * try to pick a double buffered endpoint.
1407 musb->bulk_ep = hw_ep;
1410 if (!musb->bulk_ep) {
1411 pr_debug("%s: missing bulk\n", musb_driver_name);
1418 enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, };
1420 /* Initialize MUSB (M)HDRC part of the USB hardware subsystem;
1421 * configure endpoints, or take their config from silicon
1423 static int __devinit musb_core_init(u16 musb_type, struct musb *musb)
1427 char aInfo[90], aRevision[32], aDate[12];
1428 void __iomem *mbase = musb->mregs;
1432 /* log core options (read using indexed model) */
1433 reg = musb_read_configdata(mbase);
1435 strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8");
1436 if (reg & MUSB_CONFIGDATA_DYNFIFO) {
1437 strcat(aInfo, ", dyn FIFOs");
1438 musb->dyn_fifo = true;
1440 #ifndef CONFIG_USB_MUSB_DISABLE_BULK_COMBINE_SPLIT
1441 if (reg & MUSB_CONFIGDATA_MPRXE) {
1442 strcat(aInfo, ", bulk combine");
1443 musb->bulk_combine = true;
1445 if (reg & MUSB_CONFIGDATA_MPTXE) {
1446 strcat(aInfo, ", bulk split");
1447 musb->bulk_split = true;
1450 musb->bulk_combine = false;
1451 musb->bulk_split = false;
1453 if (reg & MUSB_CONFIGDATA_HBRXE) {
1454 strcat(aInfo, ", HB-ISO Rx");
1455 musb->hb_iso_rx = true;
1457 if (reg & MUSB_CONFIGDATA_HBTXE) {
1458 strcat(aInfo, ", HB-ISO Tx");
1459 musb->hb_iso_tx = true;
1461 if (reg & MUSB_CONFIGDATA_SOFTCONE)
1462 strcat(aInfo, ", SoftConn");
1464 pr_debug("%s:ConfigData=0x%02x (%s)\n", musb_driver_name, reg, aInfo);
1467 if (MUSB_CONTROLLER_MHDRC == musb_type) {
1468 musb->is_multipoint = 1;
1471 musb->is_multipoint = 0;
1473 #ifndef CONFIG_USB_OTG_BLACKLIST_HUB
1475 "%s: kernel must blacklist external hubs\n",
1480 /* log release info */
1481 musb->hwvers = musb_read_hwvers(mbase);
1482 snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers),
1483 MUSB_HWVERS_MINOR(musb->hwvers),
1484 (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : "");
1485 pr_debug("%s: %sHDRC RTL version %s %s\n", musb_driver_name, type,
1489 musb_configure_ep0(musb);
1491 /* discover endpoint configuration */
1492 musb->nr_endpoints = 1;
1496 status = ep_config_from_table(musb);
1498 status = ep_config_from_hw(musb);
1503 /* finish init, and print endpoint config */
1504 for (i = 0; i < musb->nr_endpoints; i++) {
1505 struct musb_hw_ep *hw_ep = musb->endpoints + i;
1507 hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase;
1508 #if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)
1509 hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i);
1510 hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i);
1511 hw_ep->fifo_sync_va =
1512 musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i);
1515 hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF;
1517 hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2);
1520 hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase;
1521 hw_ep->target_regs = musb_read_target_reg_base(i, mbase);
1522 hw_ep->rx_reinit = 1;
1523 hw_ep->tx_reinit = 1;
1525 if (hw_ep->max_packet_sz_tx) {
1526 dev_dbg(musb->controller,
1527 "%s: hw_ep %d%s, %smax %d\n",
1528 musb_driver_name, i,
1529 hw_ep->is_shared_fifo ? "shared" : "tx",
1530 hw_ep->tx_double_buffered
1531 ? "doublebuffer, " : "",
1532 hw_ep->max_packet_sz_tx);
1534 if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
1535 dev_dbg(musb->controller,
1536 "%s: hw_ep %d%s, %smax %d\n",
1537 musb_driver_name, i,
1539 hw_ep->rx_double_buffered
1540 ? "doublebuffer, " : "",
1541 hw_ep->max_packet_sz_rx);
1543 if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
1544 dev_dbg(musb->controller, "hw_ep %d not configured\n", i);
1550 /*-------------------------------------------------------------------------*/
1552 #if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_SOC_OMAP3430) || \
1553 defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_ARCH_U8500)
1555 static irqreturn_t generic_interrupt(int irq, void *__hci)
1557 unsigned long flags;
1558 irqreturn_t retval = IRQ_NONE;
1559 struct musb *musb = __hci;
1561 spin_lock_irqsave(&musb->lock, flags);
1563 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
1564 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
1565 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
1567 if (musb->int_usb || musb->int_tx || musb->int_rx)
1568 retval = musb_interrupt(musb);
1570 spin_unlock_irqrestore(&musb->lock, flags);
1576 #define generic_interrupt NULL
1580 * handle all the irqs defined by the HDRC core. for now we expect: other
1581 * irq sources (phy, dma, etc) will be handled first, musb->int_* values
1582 * will be assigned, and the irq will already have been acked.
1584 * called in irq context with spinlock held, irqs blocked
1586 irqreturn_t musb_interrupt(struct musb *musb)
1588 irqreturn_t retval = IRQ_NONE;
1593 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1594 power = musb_readb(musb->mregs, MUSB_POWER);
1596 dev_dbg(musb->controller, "** IRQ %s usb%04x tx%04x rx%04x\n",
1597 (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
1598 musb->int_usb, musb->int_tx, musb->int_rx);
1600 /* the core can interrupt us for multiple reasons; docs have
1601 * a generic interrupt flowchart to follow
1604 retval |= musb_stage0_irq(musb, musb->int_usb,
1607 /* "stage 1" is handling endpoint irqs */
1609 /* handle endpoint 0 first */
1610 if (musb->int_tx & 1) {
1611 if (devctl & MUSB_DEVCTL_HM) {
1612 if (is_host_capable())
1613 retval |= musb_h_ep0_irq(musb);
1615 if (is_peripheral_capable())
1616 retval |= musb_g_ep0_irq(musb);
1620 /* RX on endpoints 1-15 */
1621 reg = musb->int_rx >> 1;
1625 /* musb_ep_select(musb->mregs, ep_num); */
1626 /* REVISIT just retval = ep->rx_irq(...) */
1627 retval = IRQ_HANDLED;
1628 if (devctl & MUSB_DEVCTL_HM) {
1629 if (is_host_capable())
1630 musb_host_rx(musb, ep_num);
1632 if (is_peripheral_capable())
1633 musb_g_rx(musb, ep_num);
1641 /* TX on endpoints 1-15 */
1642 reg = musb->int_tx >> 1;
1646 /* musb_ep_select(musb->mregs, ep_num); */
1647 /* REVISIT just retval |= ep->tx_irq(...) */
1648 retval = IRQ_HANDLED;
1649 if (devctl & MUSB_DEVCTL_HM) {
1650 if (is_host_capable())
1651 musb_host_tx(musb, ep_num);
1653 if (is_peripheral_capable())
1654 musb_g_tx(musb, ep_num);
1663 EXPORT_SYMBOL_GPL(musb_interrupt);
1665 #ifndef CONFIG_USB_MUSB_PIO_ONLY
1666 static bool __devinitdata use_dma = 1;
1668 /* "modprobe ... use_dma=0" etc */
1669 module_param(use_dma, bool, 0);
1670 MODULE_PARM_DESC(use_dma, "enable/disable use of DMA");
1672 void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
1674 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1676 /* called with controller lock already held */
1679 #ifndef CONFIG_USB_TUSB_OMAP_DMA
1680 if (!is_cppi_enabled()) {
1682 if (devctl & MUSB_DEVCTL_HM)
1683 musb_h_ep0_irq(musb);
1685 musb_g_ep0_irq(musb);
1689 /* endpoints 1..15 */
1691 if (devctl & MUSB_DEVCTL_HM) {
1692 if (is_host_capable())
1693 musb_host_tx(musb, epnum);
1695 if (is_peripheral_capable())
1696 musb_g_tx(musb, epnum);
1700 if (devctl & MUSB_DEVCTL_HM) {
1701 if (is_host_capable())
1702 musb_host_rx(musb, epnum);
1704 if (is_peripheral_capable())
1705 musb_g_rx(musb, epnum);
1710 EXPORT_SYMBOL_GPL(musb_dma_completion);
1716 /*-------------------------------------------------------------------------*/
1721 musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1723 struct musb *musb = dev_to_musb(dev);
1724 unsigned long flags;
1727 spin_lock_irqsave(&musb->lock, flags);
1728 ret = sprintf(buf, "%s\n", otg_state_string(musb->xceiv->state));
1729 spin_unlock_irqrestore(&musb->lock, flags);
1735 musb_mode_store(struct device *dev, struct device_attribute *attr,
1736 const char *buf, size_t n)
1738 struct musb *musb = dev_to_musb(dev);
1739 unsigned long flags;
1742 spin_lock_irqsave(&musb->lock, flags);
1743 if (sysfs_streq(buf, "host"))
1744 status = musb_platform_set_mode(musb, MUSB_HOST);
1745 else if (sysfs_streq(buf, "peripheral"))
1746 status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
1747 else if (sysfs_streq(buf, "otg"))
1748 status = musb_platform_set_mode(musb, MUSB_OTG);
1751 spin_unlock_irqrestore(&musb->lock, flags);
1753 return (status == 0) ? n : status;
1755 static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store);
1758 musb_vbus_store(struct device *dev, struct device_attribute *attr,
1759 const char *buf, size_t n)
1761 struct musb *musb = dev_to_musb(dev);
1762 unsigned long flags;
1765 if (sscanf(buf, "%lu", &val) < 1) {
1766 dev_err(dev, "Invalid VBUS timeout ms value\n");
1770 spin_lock_irqsave(&musb->lock, flags);
1771 /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
1772 musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
1773 if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON)
1774 musb->is_active = 0;
1775 musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
1776 spin_unlock_irqrestore(&musb->lock, flags);
1782 musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
1784 struct musb *musb = dev_to_musb(dev);
1785 unsigned long flags;
1789 spin_lock_irqsave(&musb->lock, flags);
1790 val = musb->a_wait_bcon;
1791 /* FIXME get_vbus_status() is normally #defined as false...
1792 * and is effectively TUSB-specific.
1794 vbus = musb_platform_get_vbus_status(musb);
1795 spin_unlock_irqrestore(&musb->lock, flags);
1797 return sprintf(buf, "Vbus %s, timeout %lu msec\n",
1798 vbus ? "on" : "off", val);
1800 static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);
1802 /* Gadget drivers can't know that a host is connected so they might want
1803 * to start SRP, but users can. This allows userspace to trigger SRP.
1806 musb_srp_store(struct device *dev, struct device_attribute *attr,
1807 const char *buf, size_t n)
1809 struct musb *musb = dev_to_musb(dev);
1812 if (sscanf(buf, "%hu", &srp) != 1
1814 dev_err(dev, "SRP: Value must be 1\n");
1819 musb_g_wakeup(musb);
1823 static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store);
1825 static struct attribute *musb_attributes[] = {
1826 &dev_attr_mode.attr,
1827 &dev_attr_vbus.attr,
1832 static const struct attribute_group musb_attr_group = {
1833 .attrs = musb_attributes,
1839 /* Only used to provide driver mode change events */
1840 static void musb_irq_work(struct work_struct *data)
1842 struct musb *musb = container_of(data, struct musb, irq_work);
1843 static int old_state;
1845 if (musb->xceiv->state != old_state) {
1846 old_state = musb->xceiv->state;
1847 sysfs_notify(&musb->controller->kobj, NULL, "mode");
1852 /* --------------------------------------------------------------------------
1856 static struct musb *__devinit
1857 allocate_instance(struct device *dev,
1858 struct musb_hdrc_config *config, void __iomem *mbase)
1861 struct musb_hw_ep *ep;
1864 struct usb_hcd *hcd;
1866 hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev));
1869 /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */
1871 musb = hcd_to_musb(hcd);
1873 musb = calloc(1, sizeof(*musb));
1877 INIT_LIST_HEAD(&musb->control);
1878 INIT_LIST_HEAD(&musb->in_bulk);
1879 INIT_LIST_HEAD(&musb->out_bulk);
1882 hcd->uses_new_polling = 1;
1886 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
1887 musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
1888 dev_set_drvdata(dev, musb);
1889 musb->mregs = mbase;
1890 musb->ctrl_base = mbase;
1891 musb->nIrq = -ENODEV;
1892 musb->config = config;
1893 BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
1894 for (epnum = 0, ep = musb->endpoints;
1895 epnum < musb->config->num_eps;
1901 musb->controller = dev;
1906 static void musb_free(struct musb *musb)
1908 /* this has multiple entry modes. it handles fault cleanup after
1909 * probe(), where things may be partially set up, as well as rmmod
1910 * cleanup after everything's been de-activated.
1914 sysfs_remove_group(&musb->controller->kobj, &musb_attr_group);
1917 if (musb->nIrq >= 0) {
1919 disable_irq_wake(musb->nIrq);
1920 free_irq(musb->nIrq, musb);
1922 if (is_dma_capable() && musb->dma_controller) {
1923 struct dma_controller *c = musb->dma_controller;
1926 dma_controller_destroy(c);
1933 * Perform generic per-controller initialization.
1935 * @pDevice: the controller (already clocked, etc)
1937 * @mregs: virtual address of controller registers,
1938 * not yet corrected for platform-specific offsets
1941 static int __devinit
1942 musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
1945 musb_init_controller(struct musb_hdrc_platform_data *plat, struct device *dev,
1952 struct musb_hdrc_platform_data *plat = dev->platform_data;
1957 /* The driver might handle more features than the board; OK.
1958 * Fail when the board needs a feature that's not enabled.
1961 dev_dbg(dev, "no platform_data?\n");
1967 musb = allocate_instance(dev, plat->config, ctrl);
1973 pm_runtime_use_autosuspend(musb->controller);
1974 pm_runtime_set_autosuspend_delay(musb->controller, 200);
1975 pm_runtime_enable(musb->controller);
1977 spin_lock_init(&musb->lock);
1978 musb->board_mode = plat->mode;
1979 musb->board_set_power = plat->set_power;
1980 musb->min_power = plat->min_power;
1981 musb->ops = plat->platform_ops;
1983 /* The musb_platform_init() call:
1984 * - adjusts musb->mregs and musb->isr if needed,
1985 * - may initialize an integrated tranceiver
1986 * - initializes musb->xceiv, usually by otg_get_phy()
1987 * - stops powering VBUS
1989 * There are various transceiver configurations. Blackfin,
1990 * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses
1991 * external/discrete ones in various flavors (twl4030 family,
1992 * isp1504, non-OTG, etc) mostly hooking up through ULPI.
1994 musb->isr = generic_interrupt;
1995 status = musb_platform_init(musb);
2005 if (!musb->xceiv->io_ops) {
2006 musb->xceiv->io_dev = musb->controller;
2007 musb->xceiv->io_priv = musb->mregs;
2008 musb->xceiv->io_ops = &musb_ulpi_access;
2012 pm_runtime_get_sync(musb->controller);
2014 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2015 if (use_dma && dev->dma_mask) {
2016 struct dma_controller *c;
2018 c = dma_controller_create(musb, musb->mregs);
2019 musb->dma_controller = c;
2025 /* ideally this would be abstracted in platform setup */
2026 if (!is_dma_capable() || !musb->dma_controller)
2027 dev->dma_mask = NULL;
2030 /* be sure interrupts are disabled before connecting ISR */
2031 musb_platform_disable(musb);
2032 musb_generic_disable(musb);
2034 /* setup musb parts of the core (especially endpoints) */
2035 status = musb_core_init(plat->config->multipoint
2036 ? MUSB_CONTROLLER_MHDRC
2037 : MUSB_CONTROLLER_HDRC, musb);
2041 setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb);
2043 /* Init IRQ workqueue before request_irq */
2044 INIT_WORK(&musb->irq_work, musb_irq_work);
2046 /* attach to the IRQ */
2047 if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) {
2048 dev_err(dev, "request_irq %d failed!\n", nIrq);
2053 /* FIXME this handles wakeup irqs wrong */
2054 if (enable_irq_wake(nIrq) == 0) {
2056 device_init_wakeup(dev, 1);
2062 /* host side needs more setup */
2063 if (is_host_enabled(musb)) {
2064 struct usb_hcd *hcd = musb_to_hcd(musb);
2066 otg_set_host(musb->xceiv->otg, &hcd->self);
2068 if (is_otg_enabled(musb))
2069 hcd->self.otg_port = 1;
2070 musb->xceiv->otg->host = &hcd->self;
2071 hcd->power_budget = 2 * (plat->power ? : 250);
2073 /* program PHY to use external vBus if required */
2074 if (plat->extvbus) {
2075 u8 busctl = musb_read_ulpi_buscontrol(musb->mregs);
2076 busctl |= MUSB_ULPI_USE_EXTVBUS;
2077 musb_write_ulpi_buscontrol(musb->mregs, busctl);
2082 /* For the host-only role, we can activate right away.
2083 * (We expect the ID pin to be forcibly grounded!!)
2084 * Otherwise, wait till the gadget driver hooks up.
2086 if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
2087 struct usb_hcd *hcd = musb_to_hcd(musb);
2089 MUSB_HST_MODE(musb);
2091 musb->xceiv->otg->default_a = 1;
2092 musb->xceiv->state = OTG_STATE_A_IDLE;
2094 status = usb_add_hcd(musb_to_hcd(musb), 0, 0);
2096 hcd->self.uses_pio_for_control = 1;
2097 dev_dbg(musb->controller, "%s mode, status %d, devctl %02x %c\n",
2099 musb_readb(musb->mregs, MUSB_DEVCTL),
2100 (musb_readb(musb->mregs, MUSB_DEVCTL)
2101 & MUSB_DEVCTL_BDEVICE
2105 } else /* peripheral is enabled */ {
2106 MUSB_DEV_MODE(musb);
2108 musb->xceiv->otg->default_a = 0;
2109 musb->xceiv->state = OTG_STATE_B_IDLE;
2112 if (is_peripheral_capable())
2113 status = musb_gadget_setup(musb);
2116 dev_dbg(musb->controller, "%s mode, status %d, dev%02x\n",
2117 is_otg_enabled(musb) ? "OTG" : "PERIPHERAL",
2119 musb_readb(musb->mregs, MUSB_DEVCTL));
2126 status = musb_init_debugfs(musb);
2131 status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
2136 pm_runtime_put(musb->controller);
2138 pr_debug("USB %s mode controller at %p using %s, IRQ %d\n",
2140 switch (musb->board_mode) {
2141 case MUSB_HOST: s = "Host"; break;
2142 case MUSB_PERIPHERAL: s = "Peripheral"; break;
2143 default: s = "OTG"; break;
2146 (is_dma_capable() && musb->dma_controller)
2153 return status == 0 ? musb : NULL;
2157 musb_exit_debugfs(musb);
2161 if (!is_otg_enabled(musb) && is_host_enabled(musb))
2162 usb_remove_hcd(musb_to_hcd(musb));
2165 musb_gadget_cleanup(musb);
2168 pm_runtime_put_sync(musb->controller);
2172 device_init_wakeup(dev, 0);
2173 musb_platform_exit(musb);
2176 dev_err(musb->controller,
2177 "musb_init_controller failed with status %d\n", status);
2186 return status == 0 ? musb : NULL;
2191 /*-------------------------------------------------------------------------*/
2193 /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just
2194 * bridge to a platform device; this driver then suffices.
2197 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2198 static u64 *orig_dma_mask;
2202 static int __devinit musb_probe(struct platform_device *pdev)
2204 struct device *dev = &pdev->dev;
2205 int irq = platform_get_irq_byname(pdev, "mc");
2207 struct resource *iomem;
2210 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2211 if (!iomem || irq <= 0)
2214 base = ioremap(iomem->start, resource_size(iomem));
2216 dev_err(dev, "ioremap failed\n");
2220 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2221 /* clobbered by use_dma=n */
2222 orig_dma_mask = dev->dma_mask;
2224 status = musb_init_controller(dev, irq, base);
2231 static int __devexit musb_remove(struct platform_device *pdev)
2233 struct musb *musb = dev_to_musb(&pdev->dev);
2234 void __iomem *ctrl_base = musb->ctrl_base;
2236 /* this gets called on rmmod.
2237 * - Host mode: host may still be active
2238 * - Peripheral mode: peripheral is deactivated (or never-activated)
2239 * - OTG mode: both roles are deactivated (or never-activated)
2241 musb_exit_debugfs(musb);
2242 musb_shutdown(pdev);
2246 device_init_wakeup(&pdev->dev, 0);
2247 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2248 pdev->dev.dma_mask = orig_dma_mask;
2255 static void musb_save_context(struct musb *musb)
2258 void __iomem *musb_base = musb->mregs;
2261 if (is_host_enabled(musb)) {
2262 musb->context.frame = musb_readw(musb_base, MUSB_FRAME);
2263 musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE);
2264 musb->context.busctl = musb_read_ulpi_buscontrol(musb->mregs);
2266 musb->context.power = musb_readb(musb_base, MUSB_POWER);
2267 musb->context.intrtxe = musb_readw(musb_base, MUSB_INTRTXE);
2268 musb->context.intrrxe = musb_readw(musb_base, MUSB_INTRRXE);
2269 musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE);
2270 musb->context.index = musb_readb(musb_base, MUSB_INDEX);
2271 musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL);
2273 for (i = 0; i < musb->config->num_eps; ++i) {
2274 struct musb_hw_ep *hw_ep;
2276 hw_ep = &musb->endpoints[i];
2284 musb_writeb(musb_base, MUSB_INDEX, i);
2285 musb->context.index_regs[i].txmaxp =
2286 musb_readw(epio, MUSB_TXMAXP);
2287 musb->context.index_regs[i].txcsr =
2288 musb_readw(epio, MUSB_TXCSR);
2289 musb->context.index_regs[i].rxmaxp =
2290 musb_readw(epio, MUSB_RXMAXP);
2291 musb->context.index_regs[i].rxcsr =
2292 musb_readw(epio, MUSB_RXCSR);
2294 if (musb->dyn_fifo) {
2295 musb->context.index_regs[i].txfifoadd =
2296 musb_read_txfifoadd(musb_base);
2297 musb->context.index_regs[i].rxfifoadd =
2298 musb_read_rxfifoadd(musb_base);
2299 musb->context.index_regs[i].txfifosz =
2300 musb_read_txfifosz(musb_base);
2301 musb->context.index_regs[i].rxfifosz =
2302 musb_read_rxfifosz(musb_base);
2304 if (is_host_enabled(musb)) {
2305 musb->context.index_regs[i].txtype =
2306 musb_readb(epio, MUSB_TXTYPE);
2307 musb->context.index_regs[i].txinterval =
2308 musb_readb(epio, MUSB_TXINTERVAL);
2309 musb->context.index_regs[i].rxtype =
2310 musb_readb(epio, MUSB_RXTYPE);
2311 musb->context.index_regs[i].rxinterval =
2312 musb_readb(epio, MUSB_RXINTERVAL);
2314 musb->context.index_regs[i].txfunaddr =
2315 musb_read_txfunaddr(musb_base, i);
2316 musb->context.index_regs[i].txhubaddr =
2317 musb_read_txhubaddr(musb_base, i);
2318 musb->context.index_regs[i].txhubport =
2319 musb_read_txhubport(musb_base, i);
2321 musb->context.index_regs[i].rxfunaddr =
2322 musb_read_rxfunaddr(musb_base, i);
2323 musb->context.index_regs[i].rxhubaddr =
2324 musb_read_rxhubaddr(musb_base, i);
2325 musb->context.index_regs[i].rxhubport =
2326 musb_read_rxhubport(musb_base, i);
2331 static void musb_restore_context(struct musb *musb)
2334 void __iomem *musb_base = musb->mregs;
2335 void __iomem *ep_target_regs;
2338 if (is_host_enabled(musb)) {
2339 musb_writew(musb_base, MUSB_FRAME, musb->context.frame);
2340 musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode);
2341 musb_write_ulpi_buscontrol(musb->mregs, musb->context.busctl);
2343 musb_writeb(musb_base, MUSB_POWER, musb->context.power);
2344 musb_writew(musb_base, MUSB_INTRTXE, musb->context.intrtxe);
2345 musb_writew(musb_base, MUSB_INTRRXE, musb->context.intrrxe);
2346 musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe);
2347 musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl);
2349 for (i = 0; i < musb->config->num_eps; ++i) {
2350 struct musb_hw_ep *hw_ep;
2352 hw_ep = &musb->endpoints[i];
2360 musb_writeb(musb_base, MUSB_INDEX, i);
2361 musb_writew(epio, MUSB_TXMAXP,
2362 musb->context.index_regs[i].txmaxp);
2363 musb_writew(epio, MUSB_TXCSR,
2364 musb->context.index_regs[i].txcsr);
2365 musb_writew(epio, MUSB_RXMAXP,
2366 musb->context.index_regs[i].rxmaxp);
2367 musb_writew(epio, MUSB_RXCSR,
2368 musb->context.index_regs[i].rxcsr);
2370 if (musb->dyn_fifo) {
2371 musb_write_txfifosz(musb_base,
2372 musb->context.index_regs[i].txfifosz);
2373 musb_write_rxfifosz(musb_base,
2374 musb->context.index_regs[i].rxfifosz);
2375 musb_write_txfifoadd(musb_base,
2376 musb->context.index_regs[i].txfifoadd);
2377 musb_write_rxfifoadd(musb_base,
2378 musb->context.index_regs[i].rxfifoadd);
2381 if (is_host_enabled(musb)) {
2382 musb_writeb(epio, MUSB_TXTYPE,
2383 musb->context.index_regs[i].txtype);
2384 musb_writeb(epio, MUSB_TXINTERVAL,
2385 musb->context.index_regs[i].txinterval);
2386 musb_writeb(epio, MUSB_RXTYPE,
2387 musb->context.index_regs[i].rxtype);
2388 musb_writeb(epio, MUSB_RXINTERVAL,
2390 musb->context.index_regs[i].rxinterval);
2391 musb_write_txfunaddr(musb_base, i,
2392 musb->context.index_regs[i].txfunaddr);
2393 musb_write_txhubaddr(musb_base, i,
2394 musb->context.index_regs[i].txhubaddr);
2395 musb_write_txhubport(musb_base, i,
2396 musb->context.index_regs[i].txhubport);
2399 musb_read_target_reg_base(i, musb_base);
2401 musb_write_rxfunaddr(ep_target_regs,
2402 musb->context.index_regs[i].rxfunaddr);
2403 musb_write_rxhubaddr(ep_target_regs,
2404 musb->context.index_regs[i].rxhubaddr);
2405 musb_write_rxhubport(ep_target_regs,
2406 musb->context.index_regs[i].rxhubport);
2409 musb_writeb(musb_base, MUSB_INDEX, musb->context.index);
2412 static int musb_suspend(struct device *dev)
2414 struct musb *musb = dev_to_musb(dev);
2415 unsigned long flags;
2417 spin_lock_irqsave(&musb->lock, flags);
2419 if (is_peripheral_active(musb)) {
2420 /* FIXME force disconnect unless we know USB will wake
2421 * the system up quickly enough to respond ...
2423 } else if (is_host_active(musb)) {
2424 /* we know all the children are suspended; sometimes
2425 * they will even be wakeup-enabled.
2429 spin_unlock_irqrestore(&musb->lock, flags);
2433 static int musb_resume_noirq(struct device *dev)
2435 /* for static cmos like DaVinci, register values were preserved
2436 * unless for some reason the whole soc powered down or the USB
2437 * module got reset through the PSC (vs just being disabled).
2442 static int musb_runtime_suspend(struct device *dev)
2444 struct musb *musb = dev_to_musb(dev);
2446 musb_save_context(musb);
2451 static int musb_runtime_resume(struct device *dev)
2453 struct musb *musb = dev_to_musb(dev);
2454 static int first = 1;
2457 * When pm_runtime_get_sync called for the first time in driver
2458 * init, some of the structure is still not initialized which is
2459 * used in restore function. But clock needs to be
2460 * enabled before any register access, so
2461 * pm_runtime_get_sync has to be called.
2462 * Also context restore without save does not make
2466 musb_restore_context(musb);
2472 static const struct dev_pm_ops musb_dev_pm_ops = {
2473 .suspend = musb_suspend,
2474 .resume_noirq = musb_resume_noirq,
2475 .runtime_suspend = musb_runtime_suspend,
2476 .runtime_resume = musb_runtime_resume,
2479 #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops)
2481 #define MUSB_DEV_PM_OPS NULL
2484 static struct platform_driver musb_driver = {
2486 .name = (char *)musb_driver_name,
2487 .bus = &platform_bus_type,
2488 .owner = THIS_MODULE,
2489 .pm = MUSB_DEV_PM_OPS,
2491 .probe = musb_probe,
2492 .remove = __devexit_p(musb_remove),
2493 .shutdown = musb_shutdown,
2496 /*-------------------------------------------------------------------------*/
2498 static int __init musb_init(void)
2503 pr_info("%s: version " MUSB_VERSION ", "
2506 "otg (peripheral+host)",
2508 return platform_driver_register(&musb_driver);
2510 module_init(musb_init);
2512 static void __exit musb_cleanup(void)
2514 platform_driver_unregister(&musb_driver);
2516 module_exit(musb_cleanup);