1 // SPDX-License-Identifier: GPL-2.0
3 * MUSB OTG driver core code
5 * Copyright 2005 Mentor Graphics Corporation
6 * Copyright (C) 2005-2006 by Texas Instruments
7 * Copyright (C) 2006-2007 Nokia Corporation
11 * Inventra (Multipoint) Dual-Role Controller Driver for Linux.
13 * This consists of a Host Controller Driver (HCD) and a peripheral
14 * controller driver implementing the "Gadget" API; OTG support is
15 * in the works. These are normal Linux-USB controller drivers which
16 * use IRQs and have no dedicated thread.
18 * This version of the driver has only been used with products from
19 * Texas Instruments. Those products integrate the Inventra logic
20 * with other DMA, IRQ, and bus modules, as well as other logic that
21 * needs to be reflected in this driver.
24 * NOTE: the original Mentor code here was pretty much a collection
25 * of mechanisms that don't seem to have been fully integrated/working
26 * for *any* Linux kernel version. This version aims at Linux 2.6.now,
27 * Key open issues include:
29 * - Lack of host-side transaction scheduling, for all transfer types.
30 * The hardware doesn't do it; instead, software must.
32 * This is not an issue for OTG devices that don't support external
33 * hubs, but for more "normal" USB hosts it's a user issue that the
34 * "multipoint" support doesn't scale in the expected ways. That
35 * includes DaVinci EVM in a common non-OTG mode.
37 * * Control and bulk use dedicated endpoints, and there's as
38 * yet no mechanism to either (a) reclaim the hardware when
39 * peripherals are NAKing, which gets complicated with bulk
40 * endpoints, or (b) use more than a single bulk endpoint in
43 * RESULT: one device may be perceived as blocking another one.
45 * * Interrupt and isochronous will dynamically allocate endpoint
46 * hardware, but (a) there's no record keeping for bandwidth;
47 * (b) in the common case that few endpoints are available, there
48 * is no mechanism to reuse endpoints to talk to multiple devices.
50 * RESULT: At one extreme, bandwidth can be overcommitted in
51 * some hardware configurations, no faults will be reported.
52 * At the other extreme, the bandwidth capabilities which do
53 * exist tend to be severely undercommitted. You can't yet hook
54 * up both a keyboard and a mouse to an external USB hub.
58 * This gets many kinds of configuration information:
59 * - Kconfig for everything user-configurable
60 * - platform_device for addressing, irq, and platform_data
61 * - platform_data is mostly for board-specific informarion
62 * (plus recentrly, SOC or family details)
64 * Most of the conditional compilation will (someday) vanish.
69 #include <dm/device_compat.h>
70 #include <dm/devres.h>
71 #include <linux/module.h>
72 #include <linux/kernel.h>
73 #include <linux/sched.h>
74 #include <linux/slab.h>
75 #include <linux/init.h>
76 #include <linux/list.h>
77 #include <linux/kobject.h>
78 #include <linux/prefetch.h>
79 #include <linux/platform_device.h>
84 #include <linux/errno.h>
85 #include <linux/usb/ch9.h>
86 #include <linux/usb/gadget.h>
87 #include <linux/usb/musb.h>
89 #include "linux-compat.h"
90 #include "usb-compat.h"
93 #include "musb_core.h"
95 #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
98 #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
99 #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"
101 #define MUSB_VERSION "6.0"
103 #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION
105 #define MUSB_DRIVER_NAME "musb-hdrc"
106 const char musb_driver_name[] = MUSB_DRIVER_NAME;
108 MODULE_DESCRIPTION(DRIVER_INFO);
109 MODULE_AUTHOR(DRIVER_AUTHOR);
110 MODULE_LICENSE("GPL");
111 MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
115 /*-------------------------------------------------------------------------*/
117 static inline struct musb *dev_to_musb(struct device *dev)
119 return dev_get_drvdata(dev);
122 /*-------------------------------------------------------------------------*/
124 static int musb_ulpi_read(struct usb_phy *phy, u32 offset)
126 void __iomem *addr = phy->io_priv;
132 pm_runtime_get_sync(phy->io_dev);
134 /* Make sure the transceiver is not in low power mode */
135 power = musb_readb(addr, MUSB_POWER);
136 power &= ~MUSB_POWER_SUSPENDM;
137 musb_writeb(addr, MUSB_POWER, power);
139 /* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the
140 * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
143 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
144 musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
145 MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
147 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
148 & MUSB_ULPI_REG_CMPLT)) {
156 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
157 r &= ~MUSB_ULPI_REG_CMPLT;
158 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
160 ret = musb_readb(addr, MUSB_ULPI_REG_DATA);
163 pm_runtime_put(phy->io_dev);
168 static int musb_ulpi_write(struct usb_phy *phy, u32 offset, u32 data)
170 void __iomem *addr = phy->io_priv;
176 pm_runtime_get_sync(phy->io_dev);
178 /* Make sure the transceiver is not in low power mode */
179 power = musb_readb(addr, MUSB_POWER);
180 power &= ~MUSB_POWER_SUSPENDM;
181 musb_writeb(addr, MUSB_POWER, power);
183 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
184 musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data);
185 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
187 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
188 & MUSB_ULPI_REG_CMPLT)) {
196 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
197 r &= ~MUSB_ULPI_REG_CMPLT;
198 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
201 pm_runtime_put(phy->io_dev);
206 static struct usb_phy_io_ops musb_ulpi_access = {
207 .read = musb_ulpi_read,
208 .write = musb_ulpi_write,
212 /*-------------------------------------------------------------------------*/
214 #if !defined(CONFIG_USB_MUSB_TUSB6010)
217 * Load an endpoint's FIFO
219 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
221 struct musb *musb = hw_ep->musb;
222 void __iomem *fifo = hw_ep->fifo;
226 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
227 'T', hw_ep->epnum, fifo, len, src);
229 /* we can't assume unaligned reads work */
230 if (likely((0x01 & (unsigned long) src) == 0)) {
233 /* best case is 32bit-aligned source address */
234 if ((0x02 & (unsigned long) src) == 0) {
236 writesl(fifo, src + index, len >> 2);
237 index += len & ~0x03;
240 musb_writew(fifo, 0, *(u16 *)&src[index]);
245 writesw(fifo, src + index, len >> 1);
246 index += len & ~0x01;
250 musb_writeb(fifo, 0, src[index]);
253 writesb(fifo, src, len);
257 #if !defined(CONFIG_USB_MUSB_AM35X) && !defined(CONFIG_USB_MUSB_PIC32)
259 * Unload an endpoint's FIFO
261 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
263 struct musb *musb = hw_ep->musb;
264 void __iomem *fifo = hw_ep->fifo;
266 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
267 'R', hw_ep->epnum, fifo, len, dst);
269 /* we can't assume unaligned writes work */
270 if (likely((0x01 & (unsigned long) dst) == 0)) {
273 /* best case is 32bit-aligned destination address */
274 if ((0x02 & (unsigned long) dst) == 0) {
276 readsl(fifo, dst, len >> 2);
280 *(u16 *)&dst[index] = musb_readw(fifo, 0);
285 readsw(fifo, dst, len >> 1);
290 dst[index] = musb_readb(fifo, 0);
293 readsb(fifo, dst, len);
298 #endif /* normal PIO */
301 /*-------------------------------------------------------------------------*/
303 /* for high speed test mode; see USB 2.0 spec 7.1.20 */
304 static const u8 musb_test_packet[53] = {
305 /* implicit SYNC then DATA0 to start */
308 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
310 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
312 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee,
313 /* JJJJJJJKKKKKKK x8 */
314 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
316 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd,
317 /* JKKKKKKK x10, JK */
318 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e
320 /* implicit CRC16 then EOP to end */
323 void musb_load_testpacket(struct musb *musb)
325 void __iomem *regs = musb->endpoints[0].regs;
327 musb_ep_select(musb->mregs, 0);
328 musb_write_fifo(musb->control_ep,
329 sizeof(musb_test_packet), musb_test_packet);
330 musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY);
334 /*-------------------------------------------------------------------------*/
337 * Handles OTG hnp timeouts, such as b_ase0_brst
339 void musb_otg_timer_func(unsigned long data)
341 struct musb *musb = (struct musb *)data;
344 spin_lock_irqsave(&musb->lock, flags);
345 switch (musb->xceiv->state) {
346 case OTG_STATE_B_WAIT_ACON:
347 dev_dbg(musb->controller, "HNP: b_wait_acon timeout; back to b_peripheral\n");
348 musb_g_disconnect(musb);
349 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
352 case OTG_STATE_A_SUSPEND:
353 case OTG_STATE_A_WAIT_BCON:
354 dev_dbg(musb->controller, "HNP: %s timeout\n",
355 otg_state_string(musb->xceiv->state));
356 musb_platform_set_vbus(musb, 0);
357 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
360 dev_dbg(musb->controller, "HNP: Unhandled mode %s\n",
361 otg_state_string(musb->xceiv->state));
363 musb->ignore_disconnect = 0;
364 spin_unlock_irqrestore(&musb->lock, flags);
368 * Stops the HNP transition. Caller must take care of locking.
370 void musb_hnp_stop(struct musb *musb)
372 struct usb_hcd *hcd = musb_to_hcd(musb);
373 void __iomem *mbase = musb->mregs;
376 dev_dbg(musb->controller, "HNP: stop from %s\n", otg_state_string(musb->xceiv->state));
378 switch (musb->xceiv->state) {
379 case OTG_STATE_A_PERIPHERAL:
380 musb_g_disconnect(musb);
381 dev_dbg(musb->controller, "HNP: back to %s\n",
382 otg_state_string(musb->xceiv->state));
384 case OTG_STATE_B_HOST:
385 dev_dbg(musb->controller, "HNP: Disabling HR\n");
386 hcd->self.is_b_host = 0;
387 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
389 reg = musb_readb(mbase, MUSB_POWER);
390 reg |= MUSB_POWER_SUSPENDM;
391 musb_writeb(mbase, MUSB_POWER, reg);
392 /* REVISIT: Start SESSION_REQUEST here? */
395 dev_dbg(musb->controller, "HNP: Stopping in unknown state %s\n",
396 otg_state_string(musb->xceiv->state));
400 * When returning to A state after HNP, avoid hub_port_rebounce(),
401 * which cause occasional OPT A "Did not receive reset after connect"
404 musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16);
409 * Interrupt Service Routine to record USB "global" interrupts.
410 * Since these do not happen often and signify things of
411 * paramount importance, it seems OK to check them individually;
412 * the order of the tests is specified in the manual
414 * @param musb instance pointer
415 * @param int_usb register contents
420 static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
424 struct usb_otg *otg = musb->xceiv->otg;
426 irqreturn_t handled = IRQ_NONE;
428 dev_dbg(musb->controller, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
432 /* in host mode, the peripheral may issue remote wakeup.
433 * in peripheral mode, the host may resume the link.
434 * spurious RESUME irqs happen too, paired with SUSPEND.
436 if (int_usb & MUSB_INTR_RESUME) {
437 handled = IRQ_HANDLED;
438 dev_dbg(musb->controller, "RESUME (%s)\n", otg_state_string(musb->xceiv->state));
440 if (devctl & MUSB_DEVCTL_HM) {
441 void __iomem *mbase = musb->mregs;
443 switch (musb->xceiv->state) {
444 case OTG_STATE_A_SUSPEND:
445 /* remote wakeup? later, GetPortStatus
446 * will stop RESUME signaling
449 if (power & MUSB_POWER_SUSPENDM) {
451 musb->int_usb &= ~MUSB_INTR_SUSPEND;
452 dev_dbg(musb->controller, "Spurious SUSPENDM\n");
456 power &= ~MUSB_POWER_SUSPENDM;
457 musb_writeb(mbase, MUSB_POWER,
458 power | MUSB_POWER_RESUME);
460 musb->port1_status |=
461 (USB_PORT_STAT_C_SUSPEND << 16)
462 | MUSB_PORT_STAT_RESUME;
463 musb->rh_timer = jiffies
464 + msecs_to_jiffies(20);
466 musb->xceiv->state = OTG_STATE_A_HOST;
468 usb_hcd_resume_root_hub(musb_to_hcd(musb));
470 case OTG_STATE_B_WAIT_ACON:
471 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
476 WARNING("bogus %s RESUME (%s)\n",
478 otg_state_string(musb->xceiv->state));
481 switch (musb->xceiv->state) {
482 case OTG_STATE_A_SUSPEND:
483 /* possibly DISCONNECT is upcoming */
484 musb->xceiv->state = OTG_STATE_A_HOST;
485 usb_hcd_resume_root_hub(musb_to_hcd(musb));
487 case OTG_STATE_B_WAIT_ACON:
488 case OTG_STATE_B_PERIPHERAL:
489 /* disconnect while suspended? we may
490 * not get a disconnect irq...
492 if ((devctl & MUSB_DEVCTL_VBUS)
493 != (3 << MUSB_DEVCTL_VBUS_SHIFT)
495 musb->int_usb |= MUSB_INTR_DISCONNECT;
496 musb->int_usb &= ~MUSB_INTR_SUSPEND;
501 case OTG_STATE_B_IDLE:
502 musb->int_usb &= ~MUSB_INTR_SUSPEND;
505 WARNING("bogus %s RESUME (%s)\n",
507 otg_state_string(musb->xceiv->state));
512 /* see manual for the order of the tests */
513 if (int_usb & MUSB_INTR_SESSREQ) {
514 void __iomem *mbase = musb->mregs;
516 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS
517 && (devctl & MUSB_DEVCTL_BDEVICE)) {
518 dev_dbg(musb->controller, "SessReq while on B state\n");
522 dev_dbg(musb->controller, "SESSION_REQUEST (%s)\n",
523 otg_state_string(musb->xceiv->state));
525 /* IRQ arrives from ID pin sense or (later, if VBUS power
526 * is removed) SRP. responses are time critical:
527 * - turn on VBUS (with silicon-specific mechanism)
528 * - go through A_WAIT_VRISE
529 * - ... to A_WAIT_BCON.
530 * a_wait_vrise_tmout triggers VBUS_ERROR transitions
532 musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
533 musb->ep0_stage = MUSB_EP0_START;
534 musb->xceiv->state = OTG_STATE_A_IDLE;
536 musb_platform_set_vbus(musb, 1);
538 handled = IRQ_HANDLED;
541 if (int_usb & MUSB_INTR_VBUSERROR) {
544 /* During connection as an A-Device, we may see a short
545 * current spikes causing voltage drop, because of cable
546 * and peripheral capacitance combined with vbus draw.
547 * (So: less common with truly self-powered devices, where
548 * vbus doesn't act like a power supply.)
550 * Such spikes are short; usually less than ~500 usec, max
551 * of ~2 msec. That is, they're not sustained overcurrent
552 * errors, though they're reported using VBUSERROR irqs.
554 * Workarounds: (a) hardware: use self powered devices.
555 * (b) software: ignore non-repeated VBUS errors.
557 * REVISIT: do delays from lots of DEBUG_KERNEL checks
558 * make trouble here, keeping VBUS < 4.4V ?
560 switch (musb->xceiv->state) {
561 case OTG_STATE_A_HOST:
562 /* recovery is dicey once we've gotten past the
563 * initial stages of enumeration, but if VBUS
564 * stayed ok at the other end of the link, and
565 * another reset is due (at least for high speed,
566 * to redo the chirp etc), it might work OK...
568 case OTG_STATE_A_WAIT_BCON:
569 case OTG_STATE_A_WAIT_VRISE:
570 if (musb->vbuserr_retry) {
571 void __iomem *mbase = musb->mregs;
573 musb->vbuserr_retry--;
575 devctl |= MUSB_DEVCTL_SESSION;
576 musb_writeb(mbase, MUSB_DEVCTL, devctl);
578 musb->port1_status |=
579 USB_PORT_STAT_OVERCURRENT
580 | (USB_PORT_STAT_C_OVERCURRENT << 16);
587 dev_dbg(musb->controller, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
588 otg_state_string(musb->xceiv->state),
591 switch (devctl & MUSB_DEVCTL_VBUS) {
592 case 0 << MUSB_DEVCTL_VBUS_SHIFT:
593 s = "<SessEnd"; break;
594 case 1 << MUSB_DEVCTL_VBUS_SHIFT:
595 s = "<AValid"; break;
596 case 2 << MUSB_DEVCTL_VBUS_SHIFT:
597 s = "<VBusValid"; break;
598 /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */
602 VBUSERR_RETRY_COUNT - musb->vbuserr_retry,
605 /* go through A_WAIT_VFALL then start a new session */
607 musb_platform_set_vbus(musb, 0);
608 handled = IRQ_HANDLED;
611 if (int_usb & MUSB_INTR_SUSPEND) {
612 dev_dbg(musb->controller, "SUSPEND (%s) devctl %02x power %02x\n",
613 otg_state_string(musb->xceiv->state), devctl, power);
614 handled = IRQ_HANDLED;
616 switch (musb->xceiv->state) {
617 case OTG_STATE_A_PERIPHERAL:
618 /* We also come here if the cable is removed, since
619 * this silicon doesn't report ID-no-longer-grounded.
621 * We depend on T(a_wait_bcon) to shut us down, and
622 * hope users don't do anything dicey during this
623 * undesired detour through A_WAIT_BCON.
626 usb_hcd_resume_root_hub(musb_to_hcd(musb));
627 musb_root_disconnect(musb);
628 musb_platform_try_idle(musb, jiffies
629 + msecs_to_jiffies(musb->a_wait_bcon
630 ? : OTG_TIME_A_WAIT_BCON));
633 case OTG_STATE_B_IDLE:
634 if (!musb->is_active)
636 case OTG_STATE_B_PERIPHERAL:
637 musb_g_suspend(musb);
638 musb->is_active = is_otg_enabled(musb)
639 && otg->gadget->b_hnp_enable;
640 if (musb->is_active) {
641 musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
642 dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n");
643 mod_timer(&musb->otg_timer, jiffies
645 OTG_TIME_B_ASE0_BRST));
648 case OTG_STATE_A_WAIT_BCON:
649 if (musb->a_wait_bcon != 0)
650 musb_platform_try_idle(musb, jiffies
651 + msecs_to_jiffies(musb->a_wait_bcon));
653 case OTG_STATE_A_HOST:
654 musb->xceiv->state = OTG_STATE_A_SUSPEND;
655 musb->is_active = is_otg_enabled(musb)
656 && otg->host->b_hnp_enable;
658 case OTG_STATE_B_HOST:
659 /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
660 dev_dbg(musb->controller, "REVISIT: SUSPEND as B_HOST\n");
663 /* "should not happen" */
670 if (int_usb & MUSB_INTR_CONNECT) {
671 struct usb_hcd *hcd = musb_to_hcd(musb);
673 handled = IRQ_HANDLED;
676 musb->ep0_stage = MUSB_EP0_START;
678 /* flush endpoints when transitioning from Device Mode */
679 if (is_peripheral_active(musb)) {
680 /* REVISIT HNP; just force disconnect */
682 musb_writew(musb->mregs, MUSB_INTRTXE, musb->epmask);
683 musb_writew(musb->mregs, MUSB_INTRRXE, musb->epmask & 0xfffe);
684 musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7);
686 musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED
687 |USB_PORT_STAT_HIGH_SPEED
688 |USB_PORT_STAT_ENABLE
690 musb->port1_status |= USB_PORT_STAT_CONNECTION
691 |(USB_PORT_STAT_C_CONNECTION << 16);
693 /* high vs full speed is just a guess until after reset */
694 if (devctl & MUSB_DEVCTL_LSDEV)
695 musb->port1_status |= USB_PORT_STAT_LOW_SPEED;
697 /* indicate new connection to OTG machine */
698 switch (musb->xceiv->state) {
699 case OTG_STATE_B_PERIPHERAL:
700 if (int_usb & MUSB_INTR_SUSPEND) {
701 dev_dbg(musb->controller, "HNP: SUSPEND+CONNECT, now b_host\n");
702 int_usb &= ~MUSB_INTR_SUSPEND;
705 dev_dbg(musb->controller, "CONNECT as b_peripheral???\n");
707 case OTG_STATE_B_WAIT_ACON:
708 dev_dbg(musb->controller, "HNP: CONNECT, now b_host\n");
710 musb->xceiv->state = OTG_STATE_B_HOST;
711 hcd->self.is_b_host = 1;
712 musb->ignore_disconnect = 0;
713 del_timer(&musb->otg_timer);
716 if ((devctl & MUSB_DEVCTL_VBUS)
717 == (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
718 musb->xceiv->state = OTG_STATE_A_HOST;
719 hcd->self.is_b_host = 0;
724 /* poke the root hub */
727 usb_hcd_poll_rh_status(hcd);
729 usb_hcd_resume_root_hub(hcd);
731 dev_dbg(musb->controller, "CONNECT (%s) devctl %02x\n",
732 otg_state_string(musb->xceiv->state), devctl);
737 if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
738 dev_dbg(musb->controller, "DISCONNECT (%s) as %s, devctl %02x\n",
739 otg_state_string(musb->xceiv->state),
740 MUSB_MODE(musb), devctl);
741 handled = IRQ_HANDLED;
743 switch (musb->xceiv->state) {
744 case OTG_STATE_A_HOST:
745 case OTG_STATE_A_SUSPEND:
746 usb_hcd_resume_root_hub(musb_to_hcd(musb));
747 musb_root_disconnect(musb);
748 if (musb->a_wait_bcon != 0 && is_otg_enabled(musb))
749 musb_platform_try_idle(musb, jiffies
750 + msecs_to_jiffies(musb->a_wait_bcon));
752 case OTG_STATE_B_HOST:
753 /* REVISIT this behaves for "real disconnect"
754 * cases; make sure the other transitions from
755 * from B_HOST act right too. The B_HOST code
756 * in hnp_stop() is currently not used...
758 musb_root_disconnect(musb);
759 musb_to_hcd(musb)->self.is_b_host = 0;
760 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
762 musb_g_disconnect(musb);
764 case OTG_STATE_A_PERIPHERAL:
766 musb_root_disconnect(musb);
768 case OTG_STATE_B_WAIT_ACON:
770 case OTG_STATE_B_PERIPHERAL:
771 case OTG_STATE_B_IDLE:
772 musb_g_disconnect(musb);
775 WARNING("unhandled DISCONNECT transition (%s)\n",
776 otg_state_string(musb->xceiv->state));
781 /* mentor saves a bit: bus reset and babble share the same irq.
782 * only host sees babble; only peripheral sees bus reset.
784 if (int_usb & MUSB_INTR_RESET) {
785 handled = IRQ_HANDLED;
786 if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) {
788 * Looks like non-HS BABBLE can be ignored, but
789 * HS BABBLE is an error condition. For HS the solution
790 * is to avoid babble in the first place and fix what
791 * caused BABBLE. When HS BABBLE happens we can only
794 if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
795 dev_dbg(musb->controller, "BABBLE devctl: %02x\n", devctl);
797 ERR("Stopping host session -- babble\n");
798 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
800 } else if (is_peripheral_capable()) {
801 dev_dbg(musb->controller, "BUS RESET as %s\n",
802 otg_state_string(musb->xceiv->state));
803 switch (musb->xceiv->state) {
804 case OTG_STATE_A_SUSPEND:
805 /* We need to ignore disconnect on suspend
806 * otherwise tusb 2.0 won't reconnect after a
807 * power cycle, which breaks otg compliance.
809 musb->ignore_disconnect = 1;
812 case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */
813 /* never use invalid T(a_wait_bcon) */
814 dev_dbg(musb->controller, "HNP: in %s, %d msec timeout\n",
815 otg_state_string(musb->xceiv->state),
817 mod_timer(&musb->otg_timer, jiffies
818 + msecs_to_jiffies(TA_WAIT_BCON(musb)));
820 case OTG_STATE_A_PERIPHERAL:
821 musb->ignore_disconnect = 0;
822 del_timer(&musb->otg_timer);
825 case OTG_STATE_B_WAIT_ACON:
826 dev_dbg(musb->controller, "HNP: RESET (%s), to b_peripheral\n",
827 otg_state_string(musb->xceiv->state));
828 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
831 case OTG_STATE_B_IDLE:
832 musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
834 case OTG_STATE_B_PERIPHERAL:
838 dev_dbg(musb->controller, "Unhandled BUS RESET as %s\n",
839 otg_state_string(musb->xceiv->state));
846 /* REVISIT ... this would be for multiplexing periodic endpoints, or
847 * supporting transfer phasing to prevent exceeding ISO bandwidth
848 * limits of a given frame or microframe.
850 * It's not needed for peripheral side, which dedicates endpoints;
851 * though it _might_ use SOF irqs for other purposes.
853 * And it's not currently needed for host side, which also dedicates
854 * endpoints, relies on TX/RX interval registers, and isn't claimed
855 * to support ISO transfers yet.
857 if (int_usb & MUSB_INTR_SOF) {
858 void __iomem *mbase = musb->mregs;
859 struct musb_hw_ep *ep;
863 dev_dbg(musb->controller, "START_OF_FRAME\n");
864 handled = IRQ_HANDLED;
866 /* start any periodic Tx transfers waiting for current frame */
867 frame = musb_readw(mbase, MUSB_FRAME);
868 ep = musb->endpoints;
869 for (epnum = 1; (epnum < musb->nr_endpoints)
870 && (musb->epmask >= (1 << epnum));
873 * FIXME handle framecounter wraps (12 bits)
874 * eliminate duplicated StartUrb logic
876 if (ep->dwWaitFrame >= frame) {
878 pr_debug("SOF --> periodic TX%s on %d\n",
879 ep->tx_channel ? " DMA" : "",
882 musb_h_tx_start(musb, epnum);
884 cppi_hostdma_start(musb, epnum);
886 } /* end of for loop */
890 schedule_work(&musb->irq_work);
895 /*-------------------------------------------------------------------------*/
898 * Program the HDRC to start (enable interrupts, dma, etc.).
901 void musb_start(struct musb *musb)
903 int musb_start(struct musb *musb)
906 void __iomem *regs = musb->mregs;
907 u8 devctl = musb_readb(regs, MUSB_DEVCTL);
912 dev_dbg(musb->controller, "<== devctl %02x\n", devctl);
914 /* Set INT enable registers, enable interrupts */
915 musb_writew(regs, MUSB_INTRTXE, musb->epmask);
916 musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe);
917 musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
919 musb_writeb(regs, MUSB_TESTMODE, 0);
921 /* put into basic highspeed mode and start session */
922 musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
924 /* ENSUSPEND wedges tusb */
925 /* | MUSB_POWER_ENSUSPEND */
929 devctl = musb_readb(regs, MUSB_DEVCTL);
930 devctl &= ~MUSB_DEVCTL_SESSION;
932 if (is_otg_enabled(musb)) {
934 /* session started after:
935 * (a) ID-grounded irq, host mode;
936 * (b) vbus present/connect IRQ, peripheral mode;
937 * (c) peripheral initiates, using SRP
939 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
942 devctl |= MUSB_DEVCTL_SESSION;
945 } else if (is_host_enabled(musb)) {
946 /* assume ID pin is hard-wired to ground */
947 devctl |= MUSB_DEVCTL_SESSION;
949 } else /* peripheral is enabled */ {
950 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
955 musb_platform_enable(musb);
957 ret = musb_platform_enable(musb);
963 musb_writeb(regs, MUSB_DEVCTL, devctl);
971 static void musb_generic_disable(struct musb *musb)
973 void __iomem *mbase = musb->mregs;
976 /* disable interrupts */
977 musb_writeb(mbase, MUSB_INTRUSBE, 0);
978 musb_writew(mbase, MUSB_INTRTXE, 0);
979 musb_writew(mbase, MUSB_INTRRXE, 0);
982 musb_writeb(mbase, MUSB_DEVCTL, 0);
984 /* flush pending interrupts */
985 temp = musb_readb(mbase, MUSB_INTRUSB);
986 temp = musb_readw(mbase, MUSB_INTRTX);
987 temp = musb_readw(mbase, MUSB_INTRRX);
992 * Make the HDRC stop (disable interrupts, etc.);
993 * reversible by musb_start
994 * called on gadget driver unregister
995 * with controller locked, irqs blocked
996 * acts as a NOP unless some role activated the hardware
998 void musb_stop(struct musb *musb)
1000 /* stop IRQs, timers, ... */
1001 musb_platform_disable(musb);
1002 musb_generic_disable(musb);
1003 dev_dbg(musb->controller, "HDRC disabled\n");
1006 * - mark host and/or peripheral drivers unusable/inactive
1007 * - disable DMA (and enable it in HdrcStart)
1008 * - make sure we can musb_start() after musb_stop(); with
1009 * OTG mode, gadget driver module rmmod/modprobe cycles that
1012 musb_platform_try_idle(musb, 0);
1013 musb_platform_exit(musb);
1017 static void musb_shutdown(struct platform_device *pdev)
1019 struct musb *musb = dev_to_musb(&pdev->dev);
1020 unsigned long flags;
1022 pm_runtime_get_sync(musb->controller);
1024 musb_gadget_cleanup(musb);
1026 spin_lock_irqsave(&musb->lock, flags);
1027 musb_platform_disable(musb);
1028 musb_generic_disable(musb);
1029 spin_unlock_irqrestore(&musb->lock, flags);
1031 if (!is_otg_enabled(musb) && is_host_enabled(musb))
1032 usb_remove_hcd(musb_to_hcd(musb));
1033 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
1034 musb_platform_exit(musb);
1036 pm_runtime_put(musb->controller);
1037 /* FIXME power down */
1042 /*-------------------------------------------------------------------------*/
1045 * The silicon either has hard-wired endpoint configurations, or else
1046 * "dynamic fifo" sizing. The driver has support for both, though at this
1047 * writing only the dynamic sizing is very well tested. Since we switched
1048 * away from compile-time hardware parameters, we can no longer rely on
1049 * dead code elimination to leave only the relevant one in the object file.
1051 * We don't currently use dynamic fifo setup capability to do anything
1052 * more than selecting one of a bunch of predefined configurations.
1054 #if defined(CONFIG_USB_MUSB_TUSB6010) \
1055 || defined(CONFIG_USB_MUSB_TUSB6010_MODULE) \
1056 || defined(CONFIG_USB_MUSB_OMAP2PLUS) \
1057 || defined(CONFIG_USB_MUSB_OMAP2PLUS_MODULE) \
1058 || defined(CONFIG_USB_MUSB_AM35X) \
1059 || defined(CONFIG_USB_MUSB_AM35X_MODULE) \
1060 || defined(CONFIG_USB_MUSB_DSPS) \
1061 || defined(CONFIG_USB_MUSB_DSPS_MODULE)
1062 static ushort __devinitdata fifo_mode = 4;
1063 #elif defined(CONFIG_USB_MUSB_UX500) \
1064 || defined(CONFIG_USB_MUSB_UX500_MODULE)
1065 static ushort __devinitdata fifo_mode = 5;
1067 static ushort __devinitdata fifo_mode = 2;
1070 /* "modprobe ... fifo_mode=1" etc */
1071 module_param(fifo_mode, ushort, 0);
1072 MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration");
1075 * tables defining fifo_mode values. define more if you like.
1076 * for host side, make sure both halves of ep1 are set up.
1079 /* mode 0 - fits in 2KB */
1080 static struct musb_fifo_cfg __devinitdata mode_0_cfg[] = {
1081 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1082 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1083 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, },
1084 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1085 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1088 /* mode 1 - fits in 4KB */
1089 static struct musb_fifo_cfg __devinitdata mode_1_cfg[] = {
1090 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1091 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1092 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1093 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1094 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1097 /* mode 2 - fits in 4KB */
1098 static struct musb_fifo_cfg __devinitdata mode_2_cfg[] = {
1099 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1100 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1101 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1102 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1103 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1104 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1107 /* mode 3 - fits in 4KB */
1108 static struct musb_fifo_cfg __devinitdata mode_3_cfg[] = {
1109 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1110 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1111 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1112 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1113 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1114 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1117 /* mode 4 - fits in 16KB */
1118 static struct musb_fifo_cfg __devinitdata mode_4_cfg[] = {
1119 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1120 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1121 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1122 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1123 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1124 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1125 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1126 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1127 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1128 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1129 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, },
1130 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, },
1131 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
1132 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, },
1133 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, },
1134 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, },
1135 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, },
1136 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, },
1137 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, },
1138 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, },
1139 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, },
1140 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, },
1141 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, },
1142 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, },
1143 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
1144 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1145 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1148 /* mode 5 - fits in 8KB */
1149 static struct musb_fifo_cfg __devinitdata mode_5_cfg[] = {
1150 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1151 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1152 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1153 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1154 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1155 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1156 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1157 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1158 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1159 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1160 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 32, },
1161 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 32, },
1162 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 32, },
1163 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 32, },
1164 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 32, },
1165 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 32, },
1166 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 32, },
1167 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 32, },
1168 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 32, },
1169 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 32, },
1170 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 32, },
1171 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 32, },
1172 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 32, },
1173 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 32, },
1174 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, },
1175 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1176 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1180 * configure a fifo; for non-shared endpoints, this may be called
1181 * once for a tx fifo and once for an rx fifo.
1183 * returns negative errno or offset for next fifo.
1185 static int __devinit
1186 fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep,
1187 const struct musb_fifo_cfg *cfg, u16 offset)
1189 void __iomem *mbase = musb->mregs;
1191 u16 maxpacket = cfg->maxpacket;
1192 u16 c_off = offset >> 3;
1195 /* expect hw_ep has already been zero-initialized */
1197 size = ffs(max(maxpacket, (u16) 8)) - 1;
1198 maxpacket = 1 << size;
1201 if (cfg->mode == BUF_DOUBLE) {
1202 if ((offset + (maxpacket << 1)) >
1203 (1 << (musb->config->ram_bits + 2)))
1205 c_size |= MUSB_FIFOSZ_DPB;
1207 if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2)))
1211 /* configure the FIFO */
1212 musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum);
1214 /* EP0 reserved endpoint for control, bidirectional;
1215 * EP1 reserved for bulk, two unidirection halves.
1217 if (hw_ep->epnum == 1)
1218 musb->bulk_ep = hw_ep;
1219 /* REVISIT error check: be sure ep0 can both rx and tx ... */
1220 switch (cfg->style) {
1222 musb_write_txfifosz(mbase, c_size);
1223 musb_write_txfifoadd(mbase, c_off);
1224 hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1225 hw_ep->max_packet_sz_tx = maxpacket;
1228 musb_write_rxfifosz(mbase, c_size);
1229 musb_write_rxfifoadd(mbase, c_off);
1230 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1231 hw_ep->max_packet_sz_rx = maxpacket;
1234 musb_write_txfifosz(mbase, c_size);
1235 musb_write_txfifoadd(mbase, c_off);
1236 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1237 hw_ep->max_packet_sz_rx = maxpacket;
1239 musb_write_rxfifosz(mbase, c_size);
1240 musb_write_rxfifoadd(mbase, c_off);
1241 hw_ep->tx_double_buffered = hw_ep->rx_double_buffered;
1242 hw_ep->max_packet_sz_tx = maxpacket;
1244 hw_ep->is_shared_fifo = true;
1248 /* NOTE rx and tx endpoint irqs aren't managed separately,
1249 * which happens to be ok
1251 musb->epmask |= (1 << hw_ep->epnum);
1253 return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0));
1256 static struct musb_fifo_cfg __devinitdata ep0_cfg = {
1257 .style = FIFO_RXTX, .maxpacket = 64,
1260 static int __devinit ep_config_from_table(struct musb *musb)
1262 const struct musb_fifo_cfg *cfg;
1265 struct musb_hw_ep *hw_ep = musb->endpoints;
1267 if (musb->config->fifo_cfg) {
1268 cfg = musb->config->fifo_cfg;
1269 n = musb->config->fifo_cfg_size;
1273 switch (fifo_mode) {
1279 n = ARRAY_SIZE(mode_0_cfg);
1283 n = ARRAY_SIZE(mode_1_cfg);
1287 n = ARRAY_SIZE(mode_2_cfg);
1291 n = ARRAY_SIZE(mode_3_cfg);
1295 n = ARRAY_SIZE(mode_4_cfg);
1299 n = ARRAY_SIZE(mode_5_cfg);
1303 pr_debug("%s: setup fifo_mode %d\n", musb_driver_name, fifo_mode);
1306 offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0);
1307 /* assert(offset > 0) */
1309 /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would
1310 * be better than static musb->config->num_eps and DYN_FIFO_SIZE...
1313 for (i = 0; i < n; i++) {
1314 u8 epn = cfg->hw_ep_num;
1316 if (epn >= musb->config->num_eps) {
1317 pr_debug("%s: invalid ep %d\n",
1318 musb_driver_name, epn);
1321 offset = fifo_setup(musb, hw_ep + epn, cfg++, offset);
1323 pr_debug("%s: mem overrun, ep %d\n",
1324 musb_driver_name, epn);
1328 musb->nr_endpoints = max(epn, musb->nr_endpoints);
1331 pr_debug("%s: %d/%d max ep, %d/%d memory\n", musb_driver_name, n + 1,
1332 musb->config->num_eps * 2 - 1, offset,
1333 (1 << (musb->config->ram_bits + 2)));
1335 if (!musb->bulk_ep) {
1336 pr_debug("%s: missing bulk\n", musb_driver_name);
1345 * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false
1346 * @param musb the controller
1348 static int __devinit ep_config_from_hw(struct musb *musb)
1351 struct musb_hw_ep *hw_ep;
1352 void *mbase = musb->mregs;
1355 dev_dbg(musb->controller, "<== static silicon ep config\n");
1357 /* FIXME pick up ep0 maxpacket size */
1359 for (epnum = 1; epnum < musb->config->num_eps; epnum++) {
1360 musb_ep_select(mbase, epnum);
1361 hw_ep = musb->endpoints + epnum;
1363 ret = musb_read_fifosize(musb, hw_ep, epnum);
1367 /* FIXME set up hw_ep->{rx,tx}_double_buffered */
1369 /* pick an RX/TX endpoint for bulk */
1370 if (hw_ep->max_packet_sz_tx < 512
1371 || hw_ep->max_packet_sz_rx < 512)
1374 /* REVISIT: this algorithm is lazy, we should at least
1375 * try to pick a double buffered endpoint.
1379 musb->bulk_ep = hw_ep;
1382 if (!musb->bulk_ep) {
1383 pr_debug("%s: missing bulk\n", musb_driver_name);
1390 enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, };
1392 /* Initialize MUSB (M)HDRC part of the USB hardware subsystem;
1393 * configure endpoints, or take their config from silicon
1395 static int __devinit musb_core_init(u16 musb_type, struct musb *musb)
1399 char aInfo[90], aRevision[32], aDate[12];
1400 void __iomem *mbase = musb->mregs;
1404 /* log core options (read using indexed model) */
1405 reg = musb_read_configdata(mbase);
1407 strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8");
1408 if (reg & MUSB_CONFIGDATA_DYNFIFO) {
1409 strcat(aInfo, ", dyn FIFOs");
1410 musb->dyn_fifo = true;
1412 #ifndef CONFIG_USB_MUSB_DISABLE_BULK_COMBINE_SPLIT
1413 if (reg & MUSB_CONFIGDATA_MPRXE) {
1414 strcat(aInfo, ", bulk combine");
1415 musb->bulk_combine = true;
1417 if (reg & MUSB_CONFIGDATA_MPTXE) {
1418 strcat(aInfo, ", bulk split");
1419 musb->bulk_split = true;
1422 musb->bulk_combine = false;
1423 musb->bulk_split = false;
1425 if (reg & MUSB_CONFIGDATA_HBRXE) {
1426 strcat(aInfo, ", HB-ISO Rx");
1427 musb->hb_iso_rx = true;
1429 if (reg & MUSB_CONFIGDATA_HBTXE) {
1430 strcat(aInfo, ", HB-ISO Tx");
1431 musb->hb_iso_tx = true;
1433 if (reg & MUSB_CONFIGDATA_SOFTCONE)
1434 strcat(aInfo, ", SoftConn");
1436 pr_debug("%s:ConfigData=0x%02x (%s)\n", musb_driver_name, reg, aInfo);
1439 if (MUSB_CONTROLLER_MHDRC == musb_type) {
1440 musb->is_multipoint = 1;
1443 musb->is_multipoint = 0;
1445 #ifndef CONFIG_USB_OTG_BLACKLIST_HUB
1447 "%s: kernel must blacklist external hubs\n",
1452 /* log release info */
1453 musb->hwvers = musb_read_hwvers(mbase);
1454 snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers),
1455 MUSB_HWVERS_MINOR(musb->hwvers),
1456 (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : "");
1457 pr_debug("%s: %sHDRC RTL version %s %s\n", musb_driver_name, type,
1461 musb_configure_ep0(musb);
1463 /* discover endpoint configuration */
1464 musb->nr_endpoints = 1;
1468 status = ep_config_from_table(musb);
1470 status = ep_config_from_hw(musb);
1475 /* finish init, and print endpoint config */
1476 for (i = 0; i < musb->nr_endpoints; i++) {
1477 struct musb_hw_ep *hw_ep = musb->endpoints + i;
1479 hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase;
1480 #if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)
1481 hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i);
1482 hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i);
1483 hw_ep->fifo_sync_va =
1484 musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i);
1487 hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF;
1489 hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2);
1492 hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase;
1493 hw_ep->target_regs = musb_read_target_reg_base(i, mbase);
1494 hw_ep->rx_reinit = 1;
1495 hw_ep->tx_reinit = 1;
1497 if (hw_ep->max_packet_sz_tx) {
1498 dev_dbg(musb->controller,
1499 "%s: hw_ep %d%s, %smax %d\n",
1500 musb_driver_name, i,
1501 hw_ep->is_shared_fifo ? "shared" : "tx",
1502 hw_ep->tx_double_buffered
1503 ? "doublebuffer, " : "",
1504 hw_ep->max_packet_sz_tx);
1506 if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
1507 dev_dbg(musb->controller,
1508 "%s: hw_ep %d%s, %smax %d\n",
1509 musb_driver_name, i,
1511 hw_ep->rx_double_buffered
1512 ? "doublebuffer, " : "",
1513 hw_ep->max_packet_sz_rx);
1515 if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
1516 dev_dbg(musb->controller, "hw_ep %d not configured\n", i);
1522 /*-------------------------------------------------------------------------*/
1524 #if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_SOC_OMAP3430) || \
1525 defined(CONFIG_ARCH_OMAP4)
1527 static irqreturn_t generic_interrupt(int irq, void *__hci)
1529 unsigned long flags;
1530 irqreturn_t retval = IRQ_NONE;
1531 struct musb *musb = __hci;
1533 spin_lock_irqsave(&musb->lock, flags);
1535 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
1536 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
1537 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
1539 if (musb->int_usb || musb->int_tx || musb->int_rx)
1540 retval = musb_interrupt(musb);
1542 spin_unlock_irqrestore(&musb->lock, flags);
1548 #define generic_interrupt NULL
1552 * handle all the irqs defined by the HDRC core. for now we expect: other
1553 * irq sources (phy, dma, etc) will be handled first, musb->int_* values
1554 * will be assigned, and the irq will already have been acked.
1556 * called in irq context with spinlock held, irqs blocked
1558 irqreturn_t musb_interrupt(struct musb *musb)
1560 irqreturn_t retval = IRQ_NONE;
1565 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1566 power = musb_readb(musb->mregs, MUSB_POWER);
1568 dev_dbg(musb->controller, "** IRQ %s usb%04x tx%04x rx%04x\n",
1569 (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
1570 musb->int_usb, musb->int_tx, musb->int_rx);
1572 /* the core can interrupt us for multiple reasons; docs have
1573 * a generic interrupt flowchart to follow
1576 retval |= musb_stage0_irq(musb, musb->int_usb,
1579 /* "stage 1" is handling endpoint irqs */
1581 /* handle endpoint 0 first */
1582 if (musb->int_tx & 1) {
1583 if (devctl & MUSB_DEVCTL_HM) {
1584 if (is_host_capable())
1585 retval |= musb_h_ep0_irq(musb);
1587 if (is_peripheral_capable())
1588 retval |= musb_g_ep0_irq(musb);
1592 /* RX on endpoints 1-15 */
1593 reg = musb->int_rx >> 1;
1597 /* musb_ep_select(musb->mregs, ep_num); */
1598 /* REVISIT just retval = ep->rx_irq(...) */
1599 retval = IRQ_HANDLED;
1600 if (devctl & MUSB_DEVCTL_HM) {
1601 if (is_host_capable())
1602 musb_host_rx(musb, ep_num);
1604 if (is_peripheral_capable())
1605 musb_g_rx(musb, ep_num);
1613 /* TX on endpoints 1-15 */
1614 reg = musb->int_tx >> 1;
1618 /* musb_ep_select(musb->mregs, ep_num); */
1619 /* REVISIT just retval |= ep->tx_irq(...) */
1620 retval = IRQ_HANDLED;
1621 if (devctl & MUSB_DEVCTL_HM) {
1622 if (is_host_capable())
1623 musb_host_tx(musb, ep_num);
1625 if (is_peripheral_capable())
1626 musb_g_tx(musb, ep_num);
1635 EXPORT_SYMBOL_GPL(musb_interrupt);
1637 #ifndef CONFIG_USB_MUSB_PIO_ONLY
1638 static bool __devinitdata use_dma = 1;
1640 /* "modprobe ... use_dma=0" etc */
1641 module_param(use_dma, bool, 0);
1642 MODULE_PARM_DESC(use_dma, "enable/disable use of DMA");
1644 void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
1646 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1648 /* called with controller lock already held */
1651 #ifndef CONFIG_USB_TUSB_OMAP_DMA
1652 if (!is_cppi_enabled()) {
1654 if (devctl & MUSB_DEVCTL_HM)
1655 musb_h_ep0_irq(musb);
1657 musb_g_ep0_irq(musb);
1661 /* endpoints 1..15 */
1663 if (devctl & MUSB_DEVCTL_HM) {
1664 if (is_host_capable())
1665 musb_host_tx(musb, epnum);
1667 if (is_peripheral_capable())
1668 musb_g_tx(musb, epnum);
1672 if (devctl & MUSB_DEVCTL_HM) {
1673 if (is_host_capable())
1674 musb_host_rx(musb, epnum);
1676 if (is_peripheral_capable())
1677 musb_g_rx(musb, epnum);
1682 EXPORT_SYMBOL_GPL(musb_dma_completion);
1688 /*-------------------------------------------------------------------------*/
1693 musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1695 struct musb *musb = dev_to_musb(dev);
1696 unsigned long flags;
1699 spin_lock_irqsave(&musb->lock, flags);
1700 ret = sprintf(buf, "%s\n", otg_state_string(musb->xceiv->state));
1701 spin_unlock_irqrestore(&musb->lock, flags);
1707 musb_mode_store(struct device *dev, struct device_attribute *attr,
1708 const char *buf, size_t n)
1710 struct musb *musb = dev_to_musb(dev);
1711 unsigned long flags;
1714 spin_lock_irqsave(&musb->lock, flags);
1715 if (sysfs_streq(buf, "host"))
1716 status = musb_platform_set_mode(musb, MUSB_HOST);
1717 else if (sysfs_streq(buf, "peripheral"))
1718 status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
1719 else if (sysfs_streq(buf, "otg"))
1720 status = musb_platform_set_mode(musb, MUSB_OTG);
1723 spin_unlock_irqrestore(&musb->lock, flags);
1725 return (status == 0) ? n : status;
1727 static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store);
1730 musb_vbus_store(struct device *dev, struct device_attribute *attr,
1731 const char *buf, size_t n)
1733 struct musb *musb = dev_to_musb(dev);
1734 unsigned long flags;
1737 if (sscanf(buf, "%lu", &val) < 1) {
1738 dev_err(dev, "Invalid VBUS timeout ms value\n");
1742 spin_lock_irqsave(&musb->lock, flags);
1743 /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
1744 musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
1745 if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON)
1746 musb->is_active = 0;
1747 musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
1748 spin_unlock_irqrestore(&musb->lock, flags);
1754 musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
1756 struct musb *musb = dev_to_musb(dev);
1757 unsigned long flags;
1761 spin_lock_irqsave(&musb->lock, flags);
1762 val = musb->a_wait_bcon;
1763 /* FIXME get_vbus_status() is normally #defined as false...
1764 * and is effectively TUSB-specific.
1766 vbus = musb_platform_get_vbus_status(musb);
1767 spin_unlock_irqrestore(&musb->lock, flags);
1769 return sprintf(buf, "Vbus %s, timeout %lu msec\n",
1770 vbus ? "on" : "off", val);
1772 static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);
1774 /* Gadget drivers can't know that a host is connected so they might want
1775 * to start SRP, but users can. This allows userspace to trigger SRP.
1778 musb_srp_store(struct device *dev, struct device_attribute *attr,
1779 const char *buf, size_t n)
1781 struct musb *musb = dev_to_musb(dev);
1784 if (sscanf(buf, "%hu", &srp) != 1
1786 dev_err(dev, "SRP: Value must be 1\n");
1791 musb_g_wakeup(musb);
1795 static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store);
1797 static struct attribute *musb_attributes[] = {
1798 &dev_attr_mode.attr,
1799 &dev_attr_vbus.attr,
1804 static const struct attribute_group musb_attr_group = {
1805 .attrs = musb_attributes,
1811 /* Only used to provide driver mode change events */
1812 static void musb_irq_work(struct work_struct *data)
1814 struct musb *musb = container_of(data, struct musb, irq_work);
1815 static int old_state;
1817 if (musb->xceiv->state != old_state) {
1818 old_state = musb->xceiv->state;
1819 sysfs_notify(&musb->controller->kobj, NULL, "mode");
1824 /* --------------------------------------------------------------------------
1828 static struct musb *__devinit
1829 allocate_instance(struct device *dev,
1830 struct musb_hdrc_config *config, void __iomem *mbase)
1833 struct musb_hw_ep *ep;
1836 struct usb_hcd *hcd;
1838 hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev));
1841 /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */
1843 musb = hcd_to_musb(hcd);
1845 musb = calloc(1, sizeof(*musb));
1849 INIT_LIST_HEAD(&musb->control);
1850 INIT_LIST_HEAD(&musb->in_bulk);
1851 INIT_LIST_HEAD(&musb->out_bulk);
1854 hcd->uses_new_polling = 1;
1858 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
1859 musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
1860 dev_set_drvdata(dev, musb);
1861 musb->mregs = mbase;
1862 musb->ctrl_base = mbase;
1863 musb->nIrq = -ENODEV;
1864 musb->config = config;
1866 assert_noisy(musb->config->num_eps <= MUSB_C_NUM_EPS);
1868 BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
1870 for (epnum = 0, ep = musb->endpoints;
1871 epnum < musb->config->num_eps;
1877 musb->controller = dev;
1882 static void musb_free(struct musb *musb)
1884 /* this has multiple entry modes. it handles fault cleanup after
1885 * probe(), where things may be partially set up, as well as rmmod
1886 * cleanup after everything's been de-activated.
1890 sysfs_remove_group(&musb->controller->kobj, &musb_attr_group);
1893 if (musb->nIrq >= 0) {
1895 disable_irq_wake(musb->nIrq);
1896 free_irq(musb->nIrq, musb);
1898 if (is_dma_capable() && musb->dma_controller) {
1899 struct dma_controller *c = musb->dma_controller;
1902 dma_controller_destroy(c);
1909 * Perform generic per-controller initialization.
1911 * @pDevice: the controller (already clocked, etc)
1913 * @mregs: virtual address of controller registers,
1914 * not yet corrected for platform-specific offsets
1917 static int __devinit
1918 musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
1921 musb_init_controller(struct musb_hdrc_platform_data *plat, struct device *dev,
1928 struct musb_hdrc_platform_data *plat = dev->platform_data;
1933 /* The driver might handle more features than the board; OK.
1934 * Fail when the board needs a feature that's not enabled.
1937 dev_dbg(dev, "no platform_data?\n");
1943 musb = allocate_instance(dev, plat->config, ctrl);
1949 pm_runtime_use_autosuspend(musb->controller);
1950 pm_runtime_set_autosuspend_delay(musb->controller, 200);
1951 pm_runtime_enable(musb->controller);
1953 spin_lock_init(&musb->lock);
1954 musb->board_mode = plat->mode;
1955 musb->board_set_power = plat->set_power;
1956 musb->min_power = plat->min_power;
1957 musb->ops = plat->platform_ops;
1959 /* The musb_platform_init() call:
1960 * - adjusts musb->mregs and musb->isr if needed,
1961 * - may initialize an integrated tranceiver
1962 * - initializes musb->xceiv, usually by otg_get_phy()
1963 * - stops powering VBUS
1965 * There are various transceiver configurations. Blackfin,
1966 * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses
1967 * external/discrete ones in various flavors (twl4030 family,
1968 * isp1504, non-OTG, etc) mostly hooking up through ULPI.
1970 musb->isr = generic_interrupt;
1971 status = musb_platform_init(musb);
1981 if (!musb->xceiv->io_ops) {
1982 musb->xceiv->io_dev = musb->controller;
1983 musb->xceiv->io_priv = musb->mregs;
1984 musb->xceiv->io_ops = &musb_ulpi_access;
1988 pm_runtime_get_sync(musb->controller);
1990 #ifndef CONFIG_USB_MUSB_PIO_ONLY
1991 if (use_dma && dev->dma_mask) {
1992 struct dma_controller *c;
1994 c = dma_controller_create(musb, musb->mregs);
1995 musb->dma_controller = c;
2001 /* ideally this would be abstracted in platform setup */
2002 if (!is_dma_capable() || !musb->dma_controller)
2003 dev->dma_mask = NULL;
2006 /* be sure interrupts are disabled before connecting ISR */
2007 musb_platform_disable(musb);
2008 musb_generic_disable(musb);
2010 /* setup musb parts of the core (especially endpoints) */
2011 status = musb_core_init(plat->config->multipoint
2012 ? MUSB_CONTROLLER_MHDRC
2013 : MUSB_CONTROLLER_HDRC, musb);
2017 setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb);
2019 /* Init IRQ workqueue before request_irq */
2020 INIT_WORK(&musb->irq_work, musb_irq_work);
2022 /* attach to the IRQ */
2023 if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) {
2024 dev_err(dev, "request_irq %d failed!\n", nIrq);
2029 /* FIXME this handles wakeup irqs wrong */
2030 if (enable_irq_wake(nIrq) == 0) {
2032 device_init_wakeup(dev, 1);
2038 /* host side needs more setup */
2039 if (is_host_enabled(musb)) {
2040 struct usb_hcd *hcd = musb_to_hcd(musb);
2042 otg_set_host(musb->xceiv->otg, &hcd->self);
2044 if (is_otg_enabled(musb))
2045 hcd->self.otg_port = 1;
2046 musb->xceiv->otg->host = &hcd->self;
2047 hcd->power_budget = 2 * (plat->power ? : 250);
2049 /* program PHY to use external vBus if required */
2050 if (plat->extvbus) {
2051 u8 busctl = musb_read_ulpi_buscontrol(musb->mregs);
2052 busctl |= MUSB_ULPI_USE_EXTVBUS;
2053 musb_write_ulpi_buscontrol(musb->mregs, busctl);
2058 /* For the host-only role, we can activate right away.
2059 * (We expect the ID pin to be forcibly grounded!!)
2060 * Otherwise, wait till the gadget driver hooks up.
2062 if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
2063 struct usb_hcd *hcd = musb_to_hcd(musb);
2065 MUSB_HST_MODE(musb);
2067 musb->xceiv->otg->default_a = 1;
2068 musb->xceiv->state = OTG_STATE_A_IDLE;
2070 status = usb_add_hcd(musb_to_hcd(musb), 0, 0);
2072 hcd->self.uses_pio_for_control = 1;
2073 dev_dbg(musb->controller, "%s mode, status %d, devctl %02x %c\n",
2075 musb_readb(musb->mregs, MUSB_DEVCTL),
2076 (musb_readb(musb->mregs, MUSB_DEVCTL)
2077 & MUSB_DEVCTL_BDEVICE
2081 } else /* peripheral is enabled */ {
2082 MUSB_DEV_MODE(musb);
2084 musb->xceiv->otg->default_a = 0;
2085 musb->xceiv->state = OTG_STATE_B_IDLE;
2088 if (is_peripheral_capable())
2089 status = musb_gadget_setup(musb);
2092 dev_dbg(musb->controller, "%s mode, status %d, dev%02x\n",
2093 is_otg_enabled(musb) ? "OTG" : "PERIPHERAL",
2095 musb_readb(musb->mregs, MUSB_DEVCTL));
2102 status = musb_init_debugfs(musb);
2107 status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
2112 pm_runtime_put(musb->controller);
2114 pr_debug("USB %s mode controller at %p using %s, IRQ %d\n",
2116 switch (musb->board_mode) {
2117 case MUSB_HOST: s = "Host"; break;
2118 case MUSB_PERIPHERAL: s = "Peripheral"; break;
2119 default: s = "OTG"; break;
2122 (is_dma_capable() && musb->dma_controller)
2129 return status == 0 ? musb : NULL;
2133 musb_exit_debugfs(musb);
2137 if (!is_otg_enabled(musb) && is_host_enabled(musb))
2138 usb_remove_hcd(musb_to_hcd(musb));
2141 musb_gadget_cleanup(musb);
2144 pm_runtime_put_sync(musb->controller);
2148 device_init_wakeup(dev, 0);
2149 musb_platform_exit(musb);
2152 dev_err(musb->controller,
2153 "musb_init_controller failed with status %d\n", status);
2162 return status == 0 ? musb : NULL;
2167 /*-------------------------------------------------------------------------*/
2169 /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just
2170 * bridge to a platform device; this driver then suffices.
2173 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2174 static u64 *orig_dma_mask;
2178 static int __devinit musb_probe(struct platform_device *pdev)
2180 struct device *dev = &pdev->dev;
2181 int irq = platform_get_irq_byname(pdev, "mc");
2183 struct resource *iomem;
2186 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2187 if (!iomem || irq <= 0)
2190 base = ioremap(iomem->start, resource_size(iomem));
2192 dev_err(dev, "ioremap failed\n");
2196 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2197 /* clobbered by use_dma=n */
2198 orig_dma_mask = dev->dma_mask;
2200 status = musb_init_controller(dev, irq, base);
2207 static int __devexit musb_remove(struct platform_device *pdev)
2209 struct musb *musb = dev_to_musb(&pdev->dev);
2210 void __iomem *ctrl_base = musb->ctrl_base;
2212 /* this gets called on rmmod.
2213 * - Host mode: host may still be active
2214 * - Peripheral mode: peripheral is deactivated (or never-activated)
2215 * - OTG mode: both roles are deactivated (or never-activated)
2217 musb_exit_debugfs(musb);
2218 musb_shutdown(pdev);
2222 device_init_wakeup(&pdev->dev, 0);
2223 #ifndef CONFIG_USB_MUSB_PIO_ONLY
2224 pdev->dev.dma_mask = orig_dma_mask;
2231 static void musb_save_context(struct musb *musb)
2234 void __iomem *musb_base = musb->mregs;
2237 if (is_host_enabled(musb)) {
2238 musb->context.frame = musb_readw(musb_base, MUSB_FRAME);
2239 musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE);
2240 musb->context.busctl = musb_read_ulpi_buscontrol(musb->mregs);
2242 musb->context.power = musb_readb(musb_base, MUSB_POWER);
2243 musb->context.intrtxe = musb_readw(musb_base, MUSB_INTRTXE);
2244 musb->context.intrrxe = musb_readw(musb_base, MUSB_INTRRXE);
2245 musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE);
2246 musb->context.index = musb_readb(musb_base, MUSB_INDEX);
2247 musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL);
2249 for (i = 0; i < musb->config->num_eps; ++i) {
2250 struct musb_hw_ep *hw_ep;
2252 hw_ep = &musb->endpoints[i];
2260 musb_writeb(musb_base, MUSB_INDEX, i);
2261 musb->context.index_regs[i].txmaxp =
2262 musb_readw(epio, MUSB_TXMAXP);
2263 musb->context.index_regs[i].txcsr =
2264 musb_readw(epio, MUSB_TXCSR);
2265 musb->context.index_regs[i].rxmaxp =
2266 musb_readw(epio, MUSB_RXMAXP);
2267 musb->context.index_regs[i].rxcsr =
2268 musb_readw(epio, MUSB_RXCSR);
2270 if (musb->dyn_fifo) {
2271 musb->context.index_regs[i].txfifoadd =
2272 musb_read_txfifoadd(musb_base);
2273 musb->context.index_regs[i].rxfifoadd =
2274 musb_read_rxfifoadd(musb_base);
2275 musb->context.index_regs[i].txfifosz =
2276 musb_read_txfifosz(musb_base);
2277 musb->context.index_regs[i].rxfifosz =
2278 musb_read_rxfifosz(musb_base);
2280 if (is_host_enabled(musb)) {
2281 musb->context.index_regs[i].txtype =
2282 musb_readb(epio, MUSB_TXTYPE);
2283 musb->context.index_regs[i].txinterval =
2284 musb_readb(epio, MUSB_TXINTERVAL);
2285 musb->context.index_regs[i].rxtype =
2286 musb_readb(epio, MUSB_RXTYPE);
2287 musb->context.index_regs[i].rxinterval =
2288 musb_readb(epio, MUSB_RXINTERVAL);
2290 musb->context.index_regs[i].txfunaddr =
2291 musb_read_txfunaddr(musb_base, i);
2292 musb->context.index_regs[i].txhubaddr =
2293 musb_read_txhubaddr(musb_base, i);
2294 musb->context.index_regs[i].txhubport =
2295 musb_read_txhubport(musb_base, i);
2297 musb->context.index_regs[i].rxfunaddr =
2298 musb_read_rxfunaddr(musb_base, i);
2299 musb->context.index_regs[i].rxhubaddr =
2300 musb_read_rxhubaddr(musb_base, i);
2301 musb->context.index_regs[i].rxhubport =
2302 musb_read_rxhubport(musb_base, i);
2307 static void musb_restore_context(struct musb *musb)
2310 void __iomem *musb_base = musb->mregs;
2311 void __iomem *ep_target_regs;
2314 if (is_host_enabled(musb)) {
2315 musb_writew(musb_base, MUSB_FRAME, musb->context.frame);
2316 musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode);
2317 musb_write_ulpi_buscontrol(musb->mregs, musb->context.busctl);
2319 musb_writeb(musb_base, MUSB_POWER, musb->context.power);
2320 musb_writew(musb_base, MUSB_INTRTXE, musb->context.intrtxe);
2321 musb_writew(musb_base, MUSB_INTRRXE, musb->context.intrrxe);
2322 musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe);
2323 musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl);
2325 for (i = 0; i < musb->config->num_eps; ++i) {
2326 struct musb_hw_ep *hw_ep;
2328 hw_ep = &musb->endpoints[i];
2336 musb_writeb(musb_base, MUSB_INDEX, i);
2337 musb_writew(epio, MUSB_TXMAXP,
2338 musb->context.index_regs[i].txmaxp);
2339 musb_writew(epio, MUSB_TXCSR,
2340 musb->context.index_regs[i].txcsr);
2341 musb_writew(epio, MUSB_RXMAXP,
2342 musb->context.index_regs[i].rxmaxp);
2343 musb_writew(epio, MUSB_RXCSR,
2344 musb->context.index_regs[i].rxcsr);
2346 if (musb->dyn_fifo) {
2347 musb_write_txfifosz(musb_base,
2348 musb->context.index_regs[i].txfifosz);
2349 musb_write_rxfifosz(musb_base,
2350 musb->context.index_regs[i].rxfifosz);
2351 musb_write_txfifoadd(musb_base,
2352 musb->context.index_regs[i].txfifoadd);
2353 musb_write_rxfifoadd(musb_base,
2354 musb->context.index_regs[i].rxfifoadd);
2357 if (is_host_enabled(musb)) {
2358 musb_writeb(epio, MUSB_TXTYPE,
2359 musb->context.index_regs[i].txtype);
2360 musb_writeb(epio, MUSB_TXINTERVAL,
2361 musb->context.index_regs[i].txinterval);
2362 musb_writeb(epio, MUSB_RXTYPE,
2363 musb->context.index_regs[i].rxtype);
2364 musb_writeb(epio, MUSB_RXINTERVAL,
2366 musb->context.index_regs[i].rxinterval);
2367 musb_write_txfunaddr(musb_base, i,
2368 musb->context.index_regs[i].txfunaddr);
2369 musb_write_txhubaddr(musb_base, i,
2370 musb->context.index_regs[i].txhubaddr);
2371 musb_write_txhubport(musb_base, i,
2372 musb->context.index_regs[i].txhubport);
2375 musb_read_target_reg_base(i, musb_base);
2377 musb_write_rxfunaddr(ep_target_regs,
2378 musb->context.index_regs[i].rxfunaddr);
2379 musb_write_rxhubaddr(ep_target_regs,
2380 musb->context.index_regs[i].rxhubaddr);
2381 musb_write_rxhubport(ep_target_regs,
2382 musb->context.index_regs[i].rxhubport);
2385 musb_writeb(musb_base, MUSB_INDEX, musb->context.index);
2388 static int musb_suspend(struct device *dev)
2390 struct musb *musb = dev_to_musb(dev);
2391 unsigned long flags;
2393 spin_lock_irqsave(&musb->lock, flags);
2395 if (is_peripheral_active(musb)) {
2396 /* FIXME force disconnect unless we know USB will wake
2397 * the system up quickly enough to respond ...
2399 } else if (is_host_active(musb)) {
2400 /* we know all the children are suspended; sometimes
2401 * they will even be wakeup-enabled.
2405 spin_unlock_irqrestore(&musb->lock, flags);
2409 static int musb_resume_noirq(struct device *dev)
2411 /* for static cmos like DaVinci, register values were preserved
2412 * unless for some reason the whole soc powered down or the USB
2413 * module got reset through the PSC (vs just being disabled).
2418 static int musb_runtime_suspend(struct device *dev)
2420 struct musb *musb = dev_to_musb(dev);
2422 musb_save_context(musb);
2427 static int musb_runtime_resume(struct device *dev)
2429 struct musb *musb = dev_to_musb(dev);
2430 static int first = 1;
2433 * When pm_runtime_get_sync called for the first time in driver
2434 * init, some of the structure is still not initialized which is
2435 * used in restore function. But clock needs to be
2436 * enabled before any register access, so
2437 * pm_runtime_get_sync has to be called.
2438 * Also context restore without save does not make
2442 musb_restore_context(musb);
2448 static const struct dev_pm_ops musb_dev_pm_ops = {
2449 .suspend = musb_suspend,
2450 .resume_noirq = musb_resume_noirq,
2451 .runtime_suspend = musb_runtime_suspend,
2452 .runtime_resume = musb_runtime_resume,
2455 #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops)
2457 #define MUSB_DEV_PM_OPS NULL
2460 static struct platform_driver musb_driver = {
2462 .name = (char *)musb_driver_name,
2463 .bus = &platform_bus_type,
2464 .owner = THIS_MODULE,
2465 .pm = MUSB_DEV_PM_OPS,
2467 .probe = musb_probe,
2468 .remove = __devexit_p(musb_remove),
2469 .shutdown = musb_shutdown,
2472 /*-------------------------------------------------------------------------*/
2474 static int __init musb_init(void)
2479 pr_info("%s: version " MUSB_VERSION ", "
2482 "otg (peripheral+host)",
2484 return platform_driver_register(&musb_driver);
2486 module_init(musb_init);
2488 static void __exit musb_cleanup(void)
2490 platform_driver_unregister(&musb_driver);
2492 module_exit(musb_cleanup);