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 information
62 * (plus recentrly, SOC or family details)
64 * Most of the conditional compilation will (someday) vanish.
67 #include <linux/module.h>
68 #include <linux/kernel.h>
69 #include <linux/sched.h>
70 #include <linux/slab.h>
71 #include <linux/list.h>
72 #include <linux/kobject.h>
73 #include <linux/prefetch.h>
74 #include <linux/platform_device.h>
76 #include <linux/iopoll.h>
77 #include <linux/dma-mapping.h>
78 #include <linux/usb.h>
79 #include <linux/usb/of.h>
81 #include "musb_core.h"
82 #include "musb_trace.h"
84 #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
87 #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
88 #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"
90 #define MUSB_VERSION "6.0"
92 #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION
94 #define MUSB_DRIVER_NAME "musb-hdrc"
95 const char musb_driver_name[] = MUSB_DRIVER_NAME;
97 MODULE_DESCRIPTION(DRIVER_INFO);
98 MODULE_AUTHOR(DRIVER_AUTHOR);
99 MODULE_LICENSE("GPL");
100 MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
103 /*-------------------------------------------------------------------------*/
105 static inline struct musb *dev_to_musb(struct device *dev)
107 return dev_get_drvdata(dev);
110 enum musb_mode musb_get_mode(struct device *dev)
112 enum usb_dr_mode mode;
114 mode = usb_get_dr_mode(dev);
116 case USB_DR_MODE_HOST:
118 case USB_DR_MODE_PERIPHERAL:
119 return MUSB_PERIPHERAL;
120 case USB_DR_MODE_OTG:
121 case USB_DR_MODE_UNKNOWN:
126 EXPORT_SYMBOL_GPL(musb_get_mode);
128 /*-------------------------------------------------------------------------*/
130 static int musb_ulpi_read(struct usb_phy *phy, u32 reg)
132 void __iomem *addr = phy->io_priv;
138 pm_runtime_get_sync(phy->io_dev);
140 /* Make sure the transceiver is not in low power mode */
141 power = musb_readb(addr, MUSB_POWER);
142 power &= ~MUSB_POWER_SUSPENDM;
143 musb_writeb(addr, MUSB_POWER, power);
145 /* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the
146 * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
149 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)reg);
150 musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
151 MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
153 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
154 & MUSB_ULPI_REG_CMPLT)) {
162 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
163 r &= ~MUSB_ULPI_REG_CMPLT;
164 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
166 ret = musb_readb(addr, MUSB_ULPI_REG_DATA);
169 pm_runtime_put(phy->io_dev);
174 static int musb_ulpi_write(struct usb_phy *phy, u32 val, u32 reg)
176 void __iomem *addr = phy->io_priv;
182 pm_runtime_get_sync(phy->io_dev);
184 /* Make sure the transceiver is not in low power mode */
185 power = musb_readb(addr, MUSB_POWER);
186 power &= ~MUSB_POWER_SUSPENDM;
187 musb_writeb(addr, MUSB_POWER, power);
189 musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)reg);
190 musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)val);
191 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
193 while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
194 & MUSB_ULPI_REG_CMPLT)) {
202 r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
203 r &= ~MUSB_ULPI_REG_CMPLT;
204 musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r);
207 pm_runtime_put(phy->io_dev);
212 static struct usb_phy_io_ops musb_ulpi_access = {
213 .read = musb_ulpi_read,
214 .write = musb_ulpi_write,
217 /*-------------------------------------------------------------------------*/
219 static u32 musb_default_fifo_offset(u8 epnum)
221 return 0x20 + (epnum * 4);
224 /* "flat" mapping: each endpoint has its own i/o address */
225 static void musb_flat_ep_select(void __iomem *mbase, u8 epnum)
229 static u32 musb_flat_ep_offset(u8 epnum, u16 offset)
231 return 0x100 + (0x10 * epnum) + offset;
234 /* "indexed" mapping: INDEX register controls register bank select */
235 static void musb_indexed_ep_select(void __iomem *mbase, u8 epnum)
237 musb_writeb(mbase, MUSB_INDEX, epnum);
240 static u32 musb_indexed_ep_offset(u8 epnum, u16 offset)
242 return 0x10 + offset;
245 static u32 musb_default_busctl_offset(u8 epnum, u16 offset)
247 return 0x80 + (0x08 * epnum) + offset;
250 static u8 musb_default_readb(void __iomem *addr, u32 offset)
252 u8 data = __raw_readb(addr + offset);
254 trace_musb_readb(__builtin_return_address(0), addr, offset, data);
258 static void musb_default_writeb(void __iomem *addr, u32 offset, u8 data)
260 trace_musb_writeb(__builtin_return_address(0), addr, offset, data);
261 __raw_writeb(data, addr + offset);
264 static u16 musb_default_readw(void __iomem *addr, u32 offset)
266 u16 data = __raw_readw(addr + offset);
268 trace_musb_readw(__builtin_return_address(0), addr, offset, data);
272 static void musb_default_writew(void __iomem *addr, u32 offset, u16 data)
274 trace_musb_writew(__builtin_return_address(0), addr, offset, data);
275 __raw_writew(data, addr + offset);
278 static u16 musb_default_get_toggle(struct musb_qh *qh, int is_out)
280 void __iomem *epio = qh->hw_ep->regs;
284 csr = musb_readw(epio, MUSB_TXCSR) & MUSB_TXCSR_H_DATATOGGLE;
286 csr = musb_readw(epio, MUSB_RXCSR) & MUSB_RXCSR_H_DATATOGGLE;
291 static u16 musb_default_set_toggle(struct musb_qh *qh, int is_out,
297 toggle = usb_gettoggle(urb->dev, qh->epnum, is_out);
300 csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
301 | MUSB_TXCSR_H_DATATOGGLE)
302 : MUSB_TXCSR_CLRDATATOG;
304 csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
305 | MUSB_RXCSR_H_DATATOGGLE) : 0;
311 * Load an endpoint's FIFO
313 static void musb_default_write_fifo(struct musb_hw_ep *hw_ep, u16 len,
316 struct musb *musb = hw_ep->musb;
317 void __iomem *fifo = hw_ep->fifo;
319 if (unlikely(len == 0))
324 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
325 'T', hw_ep->epnum, fifo, len, src);
327 /* we can't assume unaligned reads work */
328 if (likely((0x01 & (unsigned long) src) == 0)) {
331 /* best case is 32bit-aligned source address */
332 if ((0x02 & (unsigned long) src) == 0) {
334 iowrite32_rep(fifo, src + index, len >> 2);
335 index += len & ~0x03;
338 __raw_writew(*(u16 *)&src[index], fifo);
343 iowrite16_rep(fifo, src + index, len >> 1);
344 index += len & ~0x01;
348 __raw_writeb(src[index], fifo);
351 iowrite8_rep(fifo, src, len);
356 * Unload an endpoint's FIFO
358 static void musb_default_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
360 struct musb *musb = hw_ep->musb;
361 void __iomem *fifo = hw_ep->fifo;
363 if (unlikely(len == 0))
366 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
367 'R', hw_ep->epnum, fifo, len, dst);
369 /* we can't assume unaligned writes work */
370 if (likely((0x01 & (unsigned long) dst) == 0)) {
373 /* best case is 32bit-aligned destination address */
374 if ((0x02 & (unsigned long) dst) == 0) {
376 ioread32_rep(fifo, dst, len >> 2);
380 *(u16 *)&dst[index] = __raw_readw(fifo);
385 ioread16_rep(fifo, dst, len >> 1);
390 dst[index] = __raw_readb(fifo);
393 ioread8_rep(fifo, dst, len);
398 * Old style IO functions
400 u8 (*musb_readb)(void __iomem *addr, u32 offset);
401 EXPORT_SYMBOL_GPL(musb_readb);
403 void (*musb_writeb)(void __iomem *addr, u32 offset, u8 data);
404 EXPORT_SYMBOL_GPL(musb_writeb);
406 u8 (*musb_clearb)(void __iomem *addr, u32 offset);
407 EXPORT_SYMBOL_GPL(musb_clearb);
409 u16 (*musb_readw)(void __iomem *addr, u32 offset);
410 EXPORT_SYMBOL_GPL(musb_readw);
412 void (*musb_writew)(void __iomem *addr, u32 offset, u16 data);
413 EXPORT_SYMBOL_GPL(musb_writew);
415 u16 (*musb_clearw)(void __iomem *addr, u32 offset);
416 EXPORT_SYMBOL_GPL(musb_clearw);
418 u32 musb_readl(void __iomem *addr, u32 offset)
420 u32 data = __raw_readl(addr + offset);
422 trace_musb_readl(__builtin_return_address(0), addr, offset, data);
425 EXPORT_SYMBOL_GPL(musb_readl);
427 void musb_writel(void __iomem *addr, u32 offset, u32 data)
429 trace_musb_writel(__builtin_return_address(0), addr, offset, data);
430 __raw_writel(data, addr + offset);
432 EXPORT_SYMBOL_GPL(musb_writel);
434 #ifndef CONFIG_MUSB_PIO_ONLY
435 struct dma_controller *
436 (*musb_dma_controller_create)(struct musb *musb, void __iomem *base);
437 EXPORT_SYMBOL(musb_dma_controller_create);
439 void (*musb_dma_controller_destroy)(struct dma_controller *c);
440 EXPORT_SYMBOL(musb_dma_controller_destroy);
444 * New style IO functions
446 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
448 return hw_ep->musb->io.read_fifo(hw_ep, len, dst);
451 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
453 return hw_ep->musb->io.write_fifo(hw_ep, len, src);
456 static u8 musb_read_devctl(struct musb *musb)
458 return musb_readb(musb->mregs, MUSB_DEVCTL);
462 * musb_set_host - set and initialize host mode
463 * @musb: musb controller driver data
465 * At least some musb revisions need to enable devctl session bit in
466 * peripheral mode to switch to host mode. Initializes things to host
467 * mode and sets A_IDLE. SoC glue needs to advance state further
468 * based on phy provided VBUS state.
470 * Note that the SoC glue code may need to wait for musb to settle
471 * on enable before calling this to avoid babble.
473 int musb_set_host(struct musb *musb)
481 devctl = musb_read_devctl(musb);
482 if (!(devctl & MUSB_DEVCTL_BDEVICE)) {
483 trace_musb_state(musb, devctl, "Already in host mode");
487 devctl |= MUSB_DEVCTL_SESSION;
488 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
490 error = readx_poll_timeout(musb_read_devctl, musb, devctl,
491 !(devctl & MUSB_DEVCTL_BDEVICE), 5000,
494 dev_err(musb->controller, "%s: could not set host: %02x\n",
500 devctl = musb_read_devctl(musb);
501 trace_musb_state(musb, devctl, "Host mode set");
505 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
510 EXPORT_SYMBOL_GPL(musb_set_host);
513 * musb_set_peripheral - set and initialize peripheral mode
514 * @musb: musb controller driver data
516 * Clears devctl session bit and initializes things for peripheral
517 * mode and sets B_IDLE. SoC glue needs to advance state further
518 * based on phy provided VBUS state.
520 int musb_set_peripheral(struct musb *musb)
528 devctl = musb_read_devctl(musb);
529 if (devctl & MUSB_DEVCTL_BDEVICE) {
530 trace_musb_state(musb, devctl, "Already in peripheral mode");
534 devctl &= ~MUSB_DEVCTL_SESSION;
535 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
537 error = readx_poll_timeout(musb_read_devctl, musb, devctl,
538 devctl & MUSB_DEVCTL_BDEVICE, 5000,
541 dev_err(musb->controller, "%s: could not set peripheral: %02x\n",
547 devctl = musb_read_devctl(musb);
548 trace_musb_state(musb, devctl, "Peripheral mode set");
552 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
557 EXPORT_SYMBOL_GPL(musb_set_peripheral);
559 /*-------------------------------------------------------------------------*/
561 /* for high speed test mode; see USB 2.0 spec 7.1.20 */
562 static const u8 musb_test_packet[53] = {
563 /* implicit SYNC then DATA0 to start */
566 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
568 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
570 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee,
571 /* JJJJJJJKKKKKKK x8 */
572 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
574 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd,
575 /* JKKKKKKK x10, JK */
576 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e
578 /* implicit CRC16 then EOP to end */
581 void musb_load_testpacket(struct musb *musb)
583 void __iomem *regs = musb->endpoints[0].regs;
585 musb_ep_select(musb->mregs, 0);
586 musb_write_fifo(musb->control_ep,
587 sizeof(musb_test_packet), musb_test_packet);
588 musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY);
591 /*-------------------------------------------------------------------------*/
594 * Handles OTG hnp timeouts, such as b_ase0_brst
596 static void musb_otg_timer_func(struct timer_list *t)
598 struct musb *musb = from_timer(musb, t, otg_timer);
601 spin_lock_irqsave(&musb->lock, flags);
602 switch (musb->xceiv->otg->state) {
603 case OTG_STATE_B_WAIT_ACON:
605 "HNP: b_wait_acon timeout; back to b_peripheral");
606 musb_g_disconnect(musb);
607 musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
610 case OTG_STATE_A_SUSPEND:
611 case OTG_STATE_A_WAIT_BCON:
612 musb_dbg(musb, "HNP: %s timeout",
613 usb_otg_state_string(musb->xceiv->otg->state));
614 musb_platform_set_vbus(musb, 0);
615 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
618 musb_dbg(musb, "HNP: Unhandled mode %s",
619 usb_otg_state_string(musb->xceiv->otg->state));
621 spin_unlock_irqrestore(&musb->lock, flags);
625 * Stops the HNP transition. Caller must take care of locking.
627 void musb_hnp_stop(struct musb *musb)
629 struct usb_hcd *hcd = musb->hcd;
630 void __iomem *mbase = musb->mregs;
633 musb_dbg(musb, "HNP: stop from %s",
634 usb_otg_state_string(musb->xceiv->otg->state));
636 switch (musb->xceiv->otg->state) {
637 case OTG_STATE_A_PERIPHERAL:
638 musb_g_disconnect(musb);
639 musb_dbg(musb, "HNP: back to %s",
640 usb_otg_state_string(musb->xceiv->otg->state));
642 case OTG_STATE_B_HOST:
643 musb_dbg(musb, "HNP: Disabling HR");
645 hcd->self.is_b_host = 0;
646 musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
648 reg = musb_readb(mbase, MUSB_POWER);
649 reg |= MUSB_POWER_SUSPENDM;
650 musb_writeb(mbase, MUSB_POWER, reg);
651 /* REVISIT: Start SESSION_REQUEST here? */
654 musb_dbg(musb, "HNP: Stopping in unknown state %s",
655 usb_otg_state_string(musb->xceiv->otg->state));
659 * When returning to A state after HNP, avoid hub_port_rebounce(),
660 * which cause occasional OPT A "Did not receive reset after connect"
663 musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16);
666 static void musb_recover_from_babble(struct musb *musb);
668 static void musb_handle_intr_resume(struct musb *musb, u8 devctl)
670 musb_dbg(musb, "RESUME (%s)",
671 usb_otg_state_string(musb->xceiv->otg->state));
673 if (devctl & MUSB_DEVCTL_HM) {
674 switch (musb->xceiv->otg->state) {
675 case OTG_STATE_A_SUSPEND:
677 musb->port1_status |=
678 (USB_PORT_STAT_C_SUSPEND << 16)
679 | MUSB_PORT_STAT_RESUME;
680 musb->rh_timer = jiffies
681 + msecs_to_jiffies(USB_RESUME_TIMEOUT);
682 musb->xceiv->otg->state = OTG_STATE_A_HOST;
684 musb_host_resume_root_hub(musb);
685 schedule_delayed_work(&musb->finish_resume_work,
686 msecs_to_jiffies(USB_RESUME_TIMEOUT));
688 case OTG_STATE_B_WAIT_ACON:
689 musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
694 WARNING("bogus %s RESUME (%s)\n",
696 usb_otg_state_string(musb->xceiv->otg->state));
699 switch (musb->xceiv->otg->state) {
700 case OTG_STATE_A_SUSPEND:
701 /* possibly DISCONNECT is upcoming */
702 musb->xceiv->otg->state = OTG_STATE_A_HOST;
703 musb_host_resume_root_hub(musb);
705 case OTG_STATE_B_WAIT_ACON:
706 case OTG_STATE_B_PERIPHERAL:
707 /* disconnect while suspended? we may
708 * not get a disconnect irq...
710 if ((devctl & MUSB_DEVCTL_VBUS)
711 != (3 << MUSB_DEVCTL_VBUS_SHIFT)
713 musb->int_usb |= MUSB_INTR_DISCONNECT;
714 musb->int_usb &= ~MUSB_INTR_SUSPEND;
719 case OTG_STATE_B_IDLE:
720 musb->int_usb &= ~MUSB_INTR_SUSPEND;
723 WARNING("bogus %s RESUME (%s)\n",
725 usb_otg_state_string(musb->xceiv->otg->state));
730 /* return IRQ_HANDLED to tell the caller to return immediately */
731 static irqreturn_t musb_handle_intr_sessreq(struct musb *musb, u8 devctl)
733 void __iomem *mbase = musb->mregs;
735 if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS
736 && (devctl & MUSB_DEVCTL_BDEVICE)) {
737 musb_dbg(musb, "SessReq while on B state");
741 musb_dbg(musb, "SESSION_REQUEST (%s)",
742 usb_otg_state_string(musb->xceiv->otg->state));
744 /* IRQ arrives from ID pin sense or (later, if VBUS power
745 * is removed) SRP. responses are time critical:
746 * - turn on VBUS (with silicon-specific mechanism)
747 * - go through A_WAIT_VRISE
748 * - ... to A_WAIT_BCON.
749 * a_wait_vrise_tmout triggers VBUS_ERROR transitions
751 musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
752 musb->ep0_stage = MUSB_EP0_START;
753 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
755 musb_platform_set_vbus(musb, 1);
760 static void musb_handle_intr_vbuserr(struct musb *musb, u8 devctl)
764 /* During connection as an A-Device, we may see a short
765 * current spikes causing voltage drop, because of cable
766 * and peripheral capacitance combined with vbus draw.
767 * (So: less common with truly self-powered devices, where
768 * vbus doesn't act like a power supply.)
770 * Such spikes are short; usually less than ~500 usec, max
771 * of ~2 msec. That is, they're not sustained overcurrent
772 * errors, though they're reported using VBUSERROR irqs.
774 * Workarounds: (a) hardware: use self powered devices.
775 * (b) software: ignore non-repeated VBUS errors.
777 * REVISIT: do delays from lots of DEBUG_KERNEL checks
778 * make trouble here, keeping VBUS < 4.4V ?
780 switch (musb->xceiv->otg->state) {
781 case OTG_STATE_A_HOST:
782 /* recovery is dicey once we've gotten past the
783 * initial stages of enumeration, but if VBUS
784 * stayed ok at the other end of the link, and
785 * another reset is due (at least for high speed,
786 * to redo the chirp etc), it might work OK...
788 case OTG_STATE_A_WAIT_BCON:
789 case OTG_STATE_A_WAIT_VRISE:
790 if (musb->vbuserr_retry) {
791 void __iomem *mbase = musb->mregs;
793 musb->vbuserr_retry--;
795 devctl |= MUSB_DEVCTL_SESSION;
796 musb_writeb(mbase, MUSB_DEVCTL, devctl);
798 musb->port1_status |=
799 USB_PORT_STAT_OVERCURRENT
800 | (USB_PORT_STAT_C_OVERCURRENT << 16);
807 dev_printk(ignore ? KERN_DEBUG : KERN_ERR, musb->controller,
808 "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
809 usb_otg_state_string(musb->xceiv->otg->state),
812 switch (devctl & MUSB_DEVCTL_VBUS) {
813 case 0 << MUSB_DEVCTL_VBUS_SHIFT:
814 s = "<SessEnd"; break;
815 case 1 << MUSB_DEVCTL_VBUS_SHIFT:
816 s = "<AValid"; break;
817 case 2 << MUSB_DEVCTL_VBUS_SHIFT:
818 s = "<VBusValid"; break;
819 /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */
823 VBUSERR_RETRY_COUNT - musb->vbuserr_retry,
826 /* go through A_WAIT_VFALL then start a new session */
828 musb_platform_set_vbus(musb, 0);
831 static void musb_handle_intr_suspend(struct musb *musb, u8 devctl)
833 musb_dbg(musb, "SUSPEND (%s) devctl %02x",
834 usb_otg_state_string(musb->xceiv->otg->state), devctl);
836 switch (musb->xceiv->otg->state) {
837 case OTG_STATE_A_PERIPHERAL:
838 /* We also come here if the cable is removed, since
839 * this silicon doesn't report ID-no-longer-grounded.
841 * We depend on T(a_wait_bcon) to shut us down, and
842 * hope users don't do anything dicey during this
843 * undesired detour through A_WAIT_BCON.
846 musb_host_resume_root_hub(musb);
847 musb_root_disconnect(musb);
848 musb_platform_try_idle(musb, jiffies
849 + msecs_to_jiffies(musb->a_wait_bcon
850 ? : OTG_TIME_A_WAIT_BCON));
853 case OTG_STATE_B_IDLE:
854 if (!musb->is_active)
857 case OTG_STATE_B_PERIPHERAL:
858 musb_g_suspend(musb);
859 musb->is_active = musb->g.b_hnp_enable;
860 if (musb->is_active) {
861 musb->xceiv->otg->state = OTG_STATE_B_WAIT_ACON;
862 musb_dbg(musb, "HNP: Setting timer for b_ase0_brst");
863 mod_timer(&musb->otg_timer, jiffies
865 OTG_TIME_B_ASE0_BRST));
868 case OTG_STATE_A_WAIT_BCON:
869 if (musb->a_wait_bcon != 0)
870 musb_platform_try_idle(musb, jiffies
871 + msecs_to_jiffies(musb->a_wait_bcon));
873 case OTG_STATE_A_HOST:
874 musb->xceiv->otg->state = OTG_STATE_A_SUSPEND;
875 musb->is_active = musb->hcd->self.b_hnp_enable;
877 case OTG_STATE_B_HOST:
878 /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
879 musb_dbg(musb, "REVISIT: SUSPEND as B_HOST");
882 /* "should not happen" */
888 static void musb_handle_intr_connect(struct musb *musb, u8 devctl, u8 int_usb)
890 struct usb_hcd *hcd = musb->hcd;
893 musb->ep0_stage = MUSB_EP0_START;
895 musb->intrtxe = musb->epmask;
896 musb_writew(musb->mregs, MUSB_INTRTXE, musb->intrtxe);
897 musb->intrrxe = musb->epmask & 0xfffe;
898 musb_writew(musb->mregs, MUSB_INTRRXE, musb->intrrxe);
899 musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7);
900 musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED
901 |USB_PORT_STAT_HIGH_SPEED
902 |USB_PORT_STAT_ENABLE
904 musb->port1_status |= USB_PORT_STAT_CONNECTION
905 |(USB_PORT_STAT_C_CONNECTION << 16);
907 /* high vs full speed is just a guess until after reset */
908 if (devctl & MUSB_DEVCTL_LSDEV)
909 musb->port1_status |= USB_PORT_STAT_LOW_SPEED;
911 /* indicate new connection to OTG machine */
912 switch (musb->xceiv->otg->state) {
913 case OTG_STATE_B_PERIPHERAL:
914 if (int_usb & MUSB_INTR_SUSPEND) {
915 musb_dbg(musb, "HNP: SUSPEND+CONNECT, now b_host");
916 int_usb &= ~MUSB_INTR_SUSPEND;
919 musb_dbg(musb, "CONNECT as b_peripheral???");
921 case OTG_STATE_B_WAIT_ACON:
922 musb_dbg(musb, "HNP: CONNECT, now b_host");
924 musb->xceiv->otg->state = OTG_STATE_B_HOST;
926 musb->hcd->self.is_b_host = 1;
927 del_timer(&musb->otg_timer);
930 if ((devctl & MUSB_DEVCTL_VBUS)
931 == (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
932 musb->xceiv->otg->state = OTG_STATE_A_HOST;
934 hcd->self.is_b_host = 0;
939 musb_host_poke_root_hub(musb);
941 musb_dbg(musb, "CONNECT (%s) devctl %02x",
942 usb_otg_state_string(musb->xceiv->otg->state), devctl);
945 static void musb_handle_intr_disconnect(struct musb *musb, u8 devctl)
947 musb_dbg(musb, "DISCONNECT (%s) as %s, devctl %02x",
948 usb_otg_state_string(musb->xceiv->otg->state),
949 MUSB_MODE(musb), devctl);
951 switch (musb->xceiv->otg->state) {
952 case OTG_STATE_A_HOST:
953 case OTG_STATE_A_SUSPEND:
954 musb_host_resume_root_hub(musb);
955 musb_root_disconnect(musb);
956 if (musb->a_wait_bcon != 0)
957 musb_platform_try_idle(musb, jiffies
958 + msecs_to_jiffies(musb->a_wait_bcon));
960 case OTG_STATE_B_HOST:
961 /* REVISIT this behaves for "real disconnect"
962 * cases; make sure the other transitions from
963 * from B_HOST act right too. The B_HOST code
964 * in hnp_stop() is currently not used...
966 musb_root_disconnect(musb);
968 musb->hcd->self.is_b_host = 0;
969 musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
971 musb_g_disconnect(musb);
973 case OTG_STATE_A_PERIPHERAL:
975 musb_root_disconnect(musb);
977 case OTG_STATE_B_WAIT_ACON:
978 case OTG_STATE_B_PERIPHERAL:
979 case OTG_STATE_B_IDLE:
980 musb_g_disconnect(musb);
983 WARNING("unhandled DISCONNECT transition (%s)\n",
984 usb_otg_state_string(musb->xceiv->otg->state));
990 * mentor saves a bit: bus reset and babble share the same irq.
991 * only host sees babble; only peripheral sees bus reset.
993 static void musb_handle_intr_reset(struct musb *musb)
995 if (is_host_active(musb)) {
997 * When BABBLE happens what we can depends on which
998 * platform MUSB is running, because some platforms
999 * implemented proprietary means for 'recovering' from
1000 * Babble conditions. One such platform is AM335x. In
1001 * most cases, however, the only thing we can do is
1004 dev_err(musb->controller, "Babble\n");
1005 musb_recover_from_babble(musb);
1007 musb_dbg(musb, "BUS RESET as %s",
1008 usb_otg_state_string(musb->xceiv->otg->state));
1009 switch (musb->xceiv->otg->state) {
1010 case OTG_STATE_A_SUSPEND:
1013 case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */
1014 /* never use invalid T(a_wait_bcon) */
1015 musb_dbg(musb, "HNP: in %s, %d msec timeout",
1016 usb_otg_state_string(musb->xceiv->otg->state),
1017 TA_WAIT_BCON(musb));
1018 mod_timer(&musb->otg_timer, jiffies
1019 + msecs_to_jiffies(TA_WAIT_BCON(musb)));
1021 case OTG_STATE_A_PERIPHERAL:
1022 del_timer(&musb->otg_timer);
1025 case OTG_STATE_B_WAIT_ACON:
1026 musb_dbg(musb, "HNP: RESET (%s), to b_peripheral",
1027 usb_otg_state_string(musb->xceiv->otg->state));
1028 musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
1031 case OTG_STATE_B_IDLE:
1032 musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
1034 case OTG_STATE_B_PERIPHERAL:
1038 musb_dbg(musb, "Unhandled BUS RESET as %s",
1039 usb_otg_state_string(musb->xceiv->otg->state));
1045 * Interrupt Service Routine to record USB "global" interrupts.
1046 * Since these do not happen often and signify things of
1047 * paramount importance, it seems OK to check them individually;
1048 * the order of the tests is specified in the manual
1050 * @param musb instance pointer
1051 * @param int_usb register contents
1055 static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
1058 irqreturn_t handled = IRQ_NONE;
1060 musb_dbg(musb, "<== DevCtl=%02x, int_usb=0x%x", devctl, int_usb);
1062 /* in host mode, the peripheral may issue remote wakeup.
1063 * in peripheral mode, the host may resume the link.
1064 * spurious RESUME irqs happen too, paired with SUSPEND.
1066 if (int_usb & MUSB_INTR_RESUME) {
1067 musb_handle_intr_resume(musb, devctl);
1068 handled = IRQ_HANDLED;
1071 /* see manual for the order of the tests */
1072 if (int_usb & MUSB_INTR_SESSREQ) {
1073 if (musb_handle_intr_sessreq(musb, devctl))
1075 handled = IRQ_HANDLED;
1078 if (int_usb & MUSB_INTR_VBUSERROR) {
1079 musb_handle_intr_vbuserr(musb, devctl);
1080 handled = IRQ_HANDLED;
1083 if (int_usb & MUSB_INTR_SUSPEND) {
1084 musb_handle_intr_suspend(musb, devctl);
1085 handled = IRQ_HANDLED;
1088 if (int_usb & MUSB_INTR_CONNECT) {
1089 musb_handle_intr_connect(musb, devctl, int_usb);
1090 handled = IRQ_HANDLED;
1093 if (int_usb & MUSB_INTR_DISCONNECT) {
1094 musb_handle_intr_disconnect(musb, devctl);
1095 handled = IRQ_HANDLED;
1098 if (int_usb & MUSB_INTR_RESET) {
1099 musb_handle_intr_reset(musb);
1100 handled = IRQ_HANDLED;
1104 /* REVISIT ... this would be for multiplexing periodic endpoints, or
1105 * supporting transfer phasing to prevent exceeding ISO bandwidth
1106 * limits of a given frame or microframe.
1108 * It's not needed for peripheral side, which dedicates endpoints;
1109 * though it _might_ use SOF irqs for other purposes.
1111 * And it's not currently needed for host side, which also dedicates
1112 * endpoints, relies on TX/RX interval registers, and isn't claimed
1113 * to support ISO transfers yet.
1115 if (int_usb & MUSB_INTR_SOF) {
1116 void __iomem *mbase = musb->mregs;
1117 struct musb_hw_ep *ep;
1121 dev_dbg(musb->controller, "START_OF_FRAME\n");
1122 handled = IRQ_HANDLED;
1124 /* start any periodic Tx transfers waiting for current frame */
1125 frame = musb_readw(mbase, MUSB_FRAME);
1126 ep = musb->endpoints;
1127 for (epnum = 1; (epnum < musb->nr_endpoints)
1128 && (musb->epmask >= (1 << epnum));
1131 * FIXME handle framecounter wraps (12 bits)
1132 * eliminate duplicated StartUrb logic
1134 if (ep->dwWaitFrame >= frame) {
1135 ep->dwWaitFrame = 0;
1136 pr_debug("SOF --> periodic TX%s on %d\n",
1137 ep->tx_channel ? " DMA" : "",
1139 if (!ep->tx_channel)
1140 musb_h_tx_start(musb, epnum);
1142 cppi_hostdma_start(musb, epnum);
1144 } /* end of for loop */
1148 schedule_delayed_work(&musb->irq_work, 0);
1153 /*-------------------------------------------------------------------------*/
1155 static void musb_disable_interrupts(struct musb *musb)
1157 void __iomem *mbase = musb->mregs;
1159 /* disable interrupts */
1160 musb_writeb(mbase, MUSB_INTRUSBE, 0);
1162 musb_writew(mbase, MUSB_INTRTXE, 0);
1164 musb_writew(mbase, MUSB_INTRRXE, 0);
1166 /* flush pending interrupts */
1167 musb_clearb(mbase, MUSB_INTRUSB);
1168 musb_clearw(mbase, MUSB_INTRTX);
1169 musb_clearw(mbase, MUSB_INTRRX);
1172 static void musb_enable_interrupts(struct musb *musb)
1174 void __iomem *regs = musb->mregs;
1176 /* Set INT enable registers, enable interrupts */
1177 musb->intrtxe = musb->epmask;
1178 musb_writew(regs, MUSB_INTRTXE, musb->intrtxe);
1179 musb->intrrxe = musb->epmask & 0xfffe;
1180 musb_writew(regs, MUSB_INTRRXE, musb->intrrxe);
1181 musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
1186 * Program the HDRC to start (enable interrupts, dma, etc.).
1188 void musb_start(struct musb *musb)
1190 void __iomem *regs = musb->mregs;
1191 u8 devctl = musb_readb(regs, MUSB_DEVCTL);
1194 musb_dbg(musb, "<== devctl %02x", devctl);
1196 musb_enable_interrupts(musb);
1197 musb_writeb(regs, MUSB_TESTMODE, 0);
1199 power = MUSB_POWER_ISOUPDATE;
1201 * treating UNKNOWN as unspecified maximum speed, in which case
1202 * we will default to high-speed.
1204 if (musb->config->maximum_speed == USB_SPEED_HIGH ||
1205 musb->config->maximum_speed == USB_SPEED_UNKNOWN)
1206 power |= MUSB_POWER_HSENAB;
1207 musb_writeb(regs, MUSB_POWER, power);
1209 musb->is_active = 0;
1210 devctl = musb_readb(regs, MUSB_DEVCTL);
1211 devctl &= ~MUSB_DEVCTL_SESSION;
1213 /* session started after:
1214 * (a) ID-grounded irq, host mode;
1215 * (b) vbus present/connect IRQ, peripheral mode;
1216 * (c) peripheral initiates, using SRP
1218 if (musb->port_mode != MUSB_HOST &&
1219 musb->xceiv->otg->state != OTG_STATE_A_WAIT_BCON &&
1220 (devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) {
1221 musb->is_active = 1;
1223 devctl |= MUSB_DEVCTL_SESSION;
1226 musb_platform_enable(musb);
1227 musb_writeb(regs, MUSB_DEVCTL, devctl);
1231 * Make the HDRC stop (disable interrupts, etc.);
1232 * reversible by musb_start
1233 * called on gadget driver unregister
1234 * with controller locked, irqs blocked
1235 * acts as a NOP unless some role activated the hardware
1237 void musb_stop(struct musb *musb)
1239 /* stop IRQs, timers, ... */
1240 musb_platform_disable(musb);
1241 musb_disable_interrupts(musb);
1242 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
1245 * - mark host and/or peripheral drivers unusable/inactive
1246 * - disable DMA (and enable it in HdrcStart)
1247 * - make sure we can musb_start() after musb_stop(); with
1248 * OTG mode, gadget driver module rmmod/modprobe cycles that
1251 musb_platform_try_idle(musb, 0);
1254 /*-------------------------------------------------------------------------*/
1257 * The silicon either has hard-wired endpoint configurations, or else
1258 * "dynamic fifo" sizing. The driver has support for both, though at this
1259 * writing only the dynamic sizing is very well tested. Since we switched
1260 * away from compile-time hardware parameters, we can no longer rely on
1261 * dead code elimination to leave only the relevant one in the object file.
1263 * We don't currently use dynamic fifo setup capability to do anything
1264 * more than selecting one of a bunch of predefined configurations.
1266 static ushort fifo_mode;
1268 /* "modprobe ... fifo_mode=1" etc */
1269 module_param(fifo_mode, ushort, 0);
1270 MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration");
1273 * tables defining fifo_mode values. define more if you like.
1274 * for host side, make sure both halves of ep1 are set up.
1277 /* mode 0 - fits in 2KB */
1278 static struct musb_fifo_cfg mode_0_cfg[] = {
1279 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1280 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1281 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, },
1282 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1283 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1286 /* mode 1 - fits in 4KB */
1287 static struct musb_fifo_cfg mode_1_cfg[] = {
1288 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1289 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1290 { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1291 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1292 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1295 /* mode 2 - fits in 4KB */
1296 static struct musb_fifo_cfg mode_2_cfg[] = {
1297 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1298 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1299 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1300 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1301 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 960, },
1302 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 1024, },
1305 /* mode 3 - fits in 4KB */
1306 static struct musb_fifo_cfg mode_3_cfg[] = {
1307 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1308 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, },
1309 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1310 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1311 { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
1312 { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
1315 /* mode 4 - fits in 16KB */
1316 static struct musb_fifo_cfg mode_4_cfg[] = {
1317 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1318 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1319 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1320 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1321 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1322 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1323 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1324 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1325 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1326 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1327 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, },
1328 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, },
1329 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
1330 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, },
1331 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, },
1332 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, },
1333 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, },
1334 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, },
1335 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, },
1336 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, },
1337 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, },
1338 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, },
1339 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, },
1340 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, },
1341 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
1342 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1343 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1346 /* mode 5 - fits in 8KB */
1347 static struct musb_fifo_cfg mode_5_cfg[] = {
1348 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
1349 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
1350 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
1351 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
1352 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
1353 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
1354 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
1355 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
1356 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
1357 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
1358 { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 32, },
1359 { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 32, },
1360 { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 32, },
1361 { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 32, },
1362 { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 32, },
1363 { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 32, },
1364 { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 32, },
1365 { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 32, },
1366 { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 32, },
1367 { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 32, },
1368 { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 32, },
1369 { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 32, },
1370 { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 32, },
1371 { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 32, },
1372 { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, },
1373 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
1374 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
1378 * configure a fifo; for non-shared endpoints, this may be called
1379 * once for a tx fifo and once for an rx fifo.
1381 * returns negative errno or offset for next fifo.
1384 fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep,
1385 const struct musb_fifo_cfg *cfg, u16 offset)
1387 void __iomem *mbase = musb->mregs;
1389 u16 maxpacket = cfg->maxpacket;
1390 u16 c_off = offset >> 3;
1393 /* expect hw_ep has already been zero-initialized */
1395 size = ffs(max(maxpacket, (u16) 8)) - 1;
1396 maxpacket = 1 << size;
1399 if (cfg->mode == BUF_DOUBLE) {
1400 if ((offset + (maxpacket << 1)) >
1401 (1 << (musb->config->ram_bits + 2)))
1403 c_size |= MUSB_FIFOSZ_DPB;
1405 if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2)))
1409 /* configure the FIFO */
1410 musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum);
1412 /* EP0 reserved endpoint for control, bidirectional;
1413 * EP1 reserved for bulk, two unidirectional halves.
1415 if (hw_ep->epnum == 1)
1416 musb->bulk_ep = hw_ep;
1417 /* REVISIT error check: be sure ep0 can both rx and tx ... */
1418 switch (cfg->style) {
1420 musb_writeb(mbase, MUSB_TXFIFOSZ, c_size);
1421 musb_writew(mbase, MUSB_TXFIFOADD, c_off);
1422 hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1423 hw_ep->max_packet_sz_tx = maxpacket;
1426 musb_writeb(mbase, MUSB_RXFIFOSZ, c_size);
1427 musb_writew(mbase, MUSB_RXFIFOADD, c_off);
1428 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1429 hw_ep->max_packet_sz_rx = maxpacket;
1432 musb_writeb(mbase, MUSB_TXFIFOSZ, c_size);
1433 musb_writew(mbase, MUSB_TXFIFOADD, c_off);
1434 hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
1435 hw_ep->max_packet_sz_rx = maxpacket;
1437 musb_writeb(mbase, MUSB_RXFIFOSZ, c_size);
1438 musb_writew(mbase, MUSB_RXFIFOADD, c_off);
1439 hw_ep->tx_double_buffered = hw_ep->rx_double_buffered;
1440 hw_ep->max_packet_sz_tx = maxpacket;
1442 hw_ep->is_shared_fifo = true;
1446 /* NOTE rx and tx endpoint irqs aren't managed separately,
1447 * which happens to be ok
1449 musb->epmask |= (1 << hw_ep->epnum);
1451 return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0));
1454 static struct musb_fifo_cfg ep0_cfg = {
1455 .style = FIFO_RXTX, .maxpacket = 64,
1458 static int ep_config_from_table(struct musb *musb)
1460 const struct musb_fifo_cfg *cfg;
1463 struct musb_hw_ep *hw_ep = musb->endpoints;
1465 if (musb->config->fifo_cfg) {
1466 cfg = musb->config->fifo_cfg;
1467 n = musb->config->fifo_cfg_size;
1471 switch (fifo_mode) {
1477 n = ARRAY_SIZE(mode_0_cfg);
1481 n = ARRAY_SIZE(mode_1_cfg);
1485 n = ARRAY_SIZE(mode_2_cfg);
1489 n = ARRAY_SIZE(mode_3_cfg);
1493 n = ARRAY_SIZE(mode_4_cfg);
1497 n = ARRAY_SIZE(mode_5_cfg);
1501 pr_debug("%s: setup fifo_mode %d\n", musb_driver_name, fifo_mode);
1505 offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0);
1506 /* assert(offset > 0) */
1508 /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would
1509 * be better than static musb->config->num_eps and DYN_FIFO_SIZE...
1512 for (i = 0; i < n; i++) {
1513 u8 epn = cfg->hw_ep_num;
1515 if (epn >= musb->config->num_eps) {
1516 pr_debug("%s: invalid ep %d\n",
1517 musb_driver_name, epn);
1520 offset = fifo_setup(musb, hw_ep + epn, cfg++, offset);
1522 pr_debug("%s: mem overrun, ep %d\n",
1523 musb_driver_name, epn);
1527 musb->nr_endpoints = max(epn, musb->nr_endpoints);
1530 pr_debug("%s: %d/%d max ep, %d/%d memory\n",
1532 n + 1, musb->config->num_eps * 2 - 1,
1533 offset, (1 << (musb->config->ram_bits + 2)));
1535 if (!musb->bulk_ep) {
1536 pr_debug("%s: missing bulk\n", musb_driver_name);
1545 * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false
1546 * @param musb the controller
1548 static int ep_config_from_hw(struct musb *musb)
1551 struct musb_hw_ep *hw_ep;
1552 void __iomem *mbase = musb->mregs;
1555 musb_dbg(musb, "<== static silicon ep config");
1557 /* FIXME pick up ep0 maxpacket size */
1559 for (epnum = 1; epnum < musb->config->num_eps; epnum++) {
1560 musb_ep_select(mbase, epnum);
1561 hw_ep = musb->endpoints + epnum;
1563 ret = musb_read_fifosize(musb, hw_ep, epnum);
1567 /* FIXME set up hw_ep->{rx,tx}_double_buffered */
1569 /* pick an RX/TX endpoint for bulk */
1570 if (hw_ep->max_packet_sz_tx < 512
1571 || hw_ep->max_packet_sz_rx < 512)
1574 /* REVISIT: this algorithm is lazy, we should at least
1575 * try to pick a double buffered endpoint.
1579 musb->bulk_ep = hw_ep;
1582 if (!musb->bulk_ep) {
1583 pr_debug("%s: missing bulk\n", musb_driver_name);
1590 enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, };
1592 /* Initialize MUSB (M)HDRC part of the USB hardware subsystem;
1593 * configure endpoints, or take their config from silicon
1595 static int musb_core_init(u16 musb_type, struct musb *musb)
1600 void __iomem *mbase = musb->mregs;
1604 /* log core options (read using indexed model) */
1605 reg = musb_read_configdata(mbase);
1607 strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8");
1608 if (reg & MUSB_CONFIGDATA_DYNFIFO) {
1609 strcat(aInfo, ", dyn FIFOs");
1610 musb->dyn_fifo = true;
1612 if (reg & MUSB_CONFIGDATA_MPRXE) {
1613 strcat(aInfo, ", bulk combine");
1614 musb->bulk_combine = true;
1616 if (reg & MUSB_CONFIGDATA_MPTXE) {
1617 strcat(aInfo, ", bulk split");
1618 musb->bulk_split = true;
1620 if (reg & MUSB_CONFIGDATA_HBRXE) {
1621 strcat(aInfo, ", HB-ISO Rx");
1622 musb->hb_iso_rx = true;
1624 if (reg & MUSB_CONFIGDATA_HBTXE) {
1625 strcat(aInfo, ", HB-ISO Tx");
1626 musb->hb_iso_tx = true;
1628 if (reg & MUSB_CONFIGDATA_SOFTCONE)
1629 strcat(aInfo, ", SoftConn");
1631 pr_debug("%s: ConfigData=0x%02x (%s)\n", musb_driver_name, reg, aInfo);
1633 if (MUSB_CONTROLLER_MHDRC == musb_type) {
1634 musb->is_multipoint = 1;
1637 musb->is_multipoint = 0;
1639 if (IS_ENABLED(CONFIG_USB) &&
1640 !IS_ENABLED(CONFIG_USB_OTG_DISABLE_EXTERNAL_HUB)) {
1641 pr_err("%s: kernel must disable external hubs, please fix the configuration\n",
1646 /* log release info */
1647 musb->hwvers = musb_readw(mbase, MUSB_HWVERS);
1648 pr_debug("%s: %sHDRC RTL version %d.%d%s\n",
1649 musb_driver_name, type, MUSB_HWVERS_MAJOR(musb->hwvers),
1650 MUSB_HWVERS_MINOR(musb->hwvers),
1651 (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : "");
1654 musb_configure_ep0(musb);
1656 /* discover endpoint configuration */
1657 musb->nr_endpoints = 1;
1661 status = ep_config_from_table(musb);
1663 status = ep_config_from_hw(musb);
1668 /* finish init, and print endpoint config */
1669 for (i = 0; i < musb->nr_endpoints; i++) {
1670 struct musb_hw_ep *hw_ep = musb->endpoints + i;
1672 hw_ep->fifo = musb->io.fifo_offset(i) + mbase;
1673 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
1674 if (musb->ops->quirks & MUSB_IN_TUSB) {
1675 hw_ep->fifo_async = musb->async + 0x400 +
1676 musb->io.fifo_offset(i);
1677 hw_ep->fifo_sync = musb->sync + 0x400 +
1678 musb->io.fifo_offset(i);
1679 hw_ep->fifo_sync_va =
1680 musb->sync_va + 0x400 + musb->io.fifo_offset(i);
1683 hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF;
1685 hw_ep->conf = mbase + 0x400 +
1686 (((i - 1) & 0xf) << 2);
1690 hw_ep->regs = musb->io.ep_offset(i, 0) + mbase;
1691 hw_ep->rx_reinit = 1;
1692 hw_ep->tx_reinit = 1;
1694 if (hw_ep->max_packet_sz_tx) {
1695 musb_dbg(musb, "%s: hw_ep %d%s, %smax %d",
1696 musb_driver_name, i,
1697 hw_ep->is_shared_fifo ? "shared" : "tx",
1698 hw_ep->tx_double_buffered
1699 ? "doublebuffer, " : "",
1700 hw_ep->max_packet_sz_tx);
1702 if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
1703 musb_dbg(musb, "%s: hw_ep %d%s, %smax %d",
1704 musb_driver_name, i,
1706 hw_ep->rx_double_buffered
1707 ? "doublebuffer, " : "",
1708 hw_ep->max_packet_sz_rx);
1710 if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
1711 musb_dbg(musb, "hw_ep %d not configured", i);
1717 /*-------------------------------------------------------------------------*/
1720 * handle all the irqs defined by the HDRC core. for now we expect: other
1721 * irq sources (phy, dma, etc) will be handled first, musb->int_* values
1722 * will be assigned, and the irq will already have been acked.
1724 * called in irq context with spinlock held, irqs blocked
1726 irqreturn_t musb_interrupt(struct musb *musb)
1728 irqreturn_t retval = IRQ_NONE;
1729 unsigned long status;
1730 unsigned long epnum;
1733 if (!musb->int_usb && !musb->int_tx && !musb->int_rx)
1736 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1738 trace_musb_isr(musb);
1741 * According to Mentor Graphics' documentation, flowchart on page 98,
1742 * IRQ should be handled as follows:
1745 * . Session Request IRQ
1750 * . Reset/Babble IRQ
1751 * . SOF IRQ (we're not using this one)
1756 * We will be following that flowchart in order to avoid any problems
1757 * that might arise with internal Finite State Machine.
1761 retval |= musb_stage0_irq(musb, musb->int_usb, devctl);
1763 if (musb->int_tx & 1) {
1764 if (is_host_active(musb))
1765 retval |= musb_h_ep0_irq(musb);
1767 retval |= musb_g_ep0_irq(musb);
1769 /* we have just handled endpoint 0 IRQ, clear it */
1770 musb->int_tx &= ~BIT(0);
1773 status = musb->int_tx;
1775 for_each_set_bit(epnum, &status, 16) {
1776 retval = IRQ_HANDLED;
1777 if (is_host_active(musb))
1778 musb_host_tx(musb, epnum);
1780 musb_g_tx(musb, epnum);
1783 status = musb->int_rx;
1785 for_each_set_bit(epnum, &status, 16) {
1786 retval = IRQ_HANDLED;
1787 if (is_host_active(musb))
1788 musb_host_rx(musb, epnum);
1790 musb_g_rx(musb, epnum);
1795 EXPORT_SYMBOL_GPL(musb_interrupt);
1797 #ifndef CONFIG_MUSB_PIO_ONLY
1798 static bool use_dma = true;
1800 /* "modprobe ... use_dma=0" etc */
1801 module_param(use_dma, bool, 0644);
1802 MODULE_PARM_DESC(use_dma, "enable/disable use of DMA");
1804 void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
1806 /* called with controller lock already held */
1809 if (!is_cppi_enabled(musb)) {
1811 if (is_host_active(musb))
1812 musb_h_ep0_irq(musb);
1814 musb_g_ep0_irq(musb);
1817 /* endpoints 1..15 */
1819 if (is_host_active(musb))
1820 musb_host_tx(musb, epnum);
1822 musb_g_tx(musb, epnum);
1825 if (is_host_active(musb))
1826 musb_host_rx(musb, epnum);
1828 musb_g_rx(musb, epnum);
1832 EXPORT_SYMBOL_GPL(musb_dma_completion);
1838 static int (*musb_phy_callback)(enum musb_vbus_id_status status);
1841 * musb_mailbox - optional phy notifier function
1842 * @status phy state change
1844 * Optionally gets called from the USB PHY. Note that the USB PHY must be
1845 * disabled at the point the phy_callback is registered or unregistered.
1847 int musb_mailbox(enum musb_vbus_id_status status)
1849 if (musb_phy_callback)
1850 return musb_phy_callback(status);
1854 EXPORT_SYMBOL_GPL(musb_mailbox);
1856 /*-------------------------------------------------------------------------*/
1859 mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1861 struct musb *musb = dev_to_musb(dev);
1862 unsigned long flags;
1865 spin_lock_irqsave(&musb->lock, flags);
1866 ret = sprintf(buf, "%s\n", usb_otg_state_string(musb->xceiv->otg->state));
1867 spin_unlock_irqrestore(&musb->lock, flags);
1873 mode_store(struct device *dev, struct device_attribute *attr,
1874 const char *buf, size_t n)
1876 struct musb *musb = dev_to_musb(dev);
1877 unsigned long flags;
1880 spin_lock_irqsave(&musb->lock, flags);
1881 if (sysfs_streq(buf, "host"))
1882 status = musb_platform_set_mode(musb, MUSB_HOST);
1883 else if (sysfs_streq(buf, "peripheral"))
1884 status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
1885 else if (sysfs_streq(buf, "otg"))
1886 status = musb_platform_set_mode(musb, MUSB_OTG);
1889 spin_unlock_irqrestore(&musb->lock, flags);
1891 return (status == 0) ? n : status;
1893 static DEVICE_ATTR_RW(mode);
1896 vbus_store(struct device *dev, struct device_attribute *attr,
1897 const char *buf, size_t n)
1899 struct musb *musb = dev_to_musb(dev);
1900 unsigned long flags;
1903 if (sscanf(buf, "%lu", &val) < 1) {
1904 dev_err(dev, "Invalid VBUS timeout ms value\n");
1908 spin_lock_irqsave(&musb->lock, flags);
1909 /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
1910 musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
1911 if (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON)
1912 musb->is_active = 0;
1913 musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
1914 spin_unlock_irqrestore(&musb->lock, flags);
1920 vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
1922 struct musb *musb = dev_to_musb(dev);
1923 unsigned long flags;
1928 pm_runtime_get_sync(dev);
1929 spin_lock_irqsave(&musb->lock, flags);
1930 val = musb->a_wait_bcon;
1931 vbus = musb_platform_get_vbus_status(musb);
1933 /* Use default MUSB method by means of DEVCTL register */
1934 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
1935 if ((devctl & MUSB_DEVCTL_VBUS)
1936 == (3 << MUSB_DEVCTL_VBUS_SHIFT))
1941 spin_unlock_irqrestore(&musb->lock, flags);
1942 pm_runtime_put_sync(dev);
1944 return sprintf(buf, "Vbus %s, timeout %lu msec\n",
1945 vbus ? "on" : "off", val);
1947 static DEVICE_ATTR_RW(vbus);
1949 /* Gadget drivers can't know that a host is connected so they might want
1950 * to start SRP, but users can. This allows userspace to trigger SRP.
1952 static ssize_t srp_store(struct device *dev, struct device_attribute *attr,
1953 const char *buf, size_t n)
1955 struct musb *musb = dev_to_musb(dev);
1958 if (sscanf(buf, "%hu", &srp) != 1
1960 dev_err(dev, "SRP: Value must be 1\n");
1965 musb_g_wakeup(musb);
1969 static DEVICE_ATTR_WO(srp);
1971 static struct attribute *musb_attrs[] = {
1972 &dev_attr_mode.attr,
1973 &dev_attr_vbus.attr,
1977 ATTRIBUTE_GROUPS(musb);
1979 #define MUSB_QUIRK_B_INVALID_VBUS_91 (MUSB_DEVCTL_BDEVICE | \
1980 (2 << MUSB_DEVCTL_VBUS_SHIFT) | \
1981 MUSB_DEVCTL_SESSION)
1982 #define MUSB_QUIRK_B_DISCONNECT_99 (MUSB_DEVCTL_BDEVICE | \
1983 (3 << MUSB_DEVCTL_VBUS_SHIFT) | \
1984 MUSB_DEVCTL_SESSION)
1985 #define MUSB_QUIRK_A_DISCONNECT_19 ((3 << MUSB_DEVCTL_VBUS_SHIFT) | \
1986 MUSB_DEVCTL_SESSION)
1988 static bool musb_state_needs_recheck(struct musb *musb, u8 devctl,
1991 if (musb->quirk_retries && !musb->flush_irq_work) {
1992 trace_musb_state(musb, devctl, desc);
1993 schedule_delayed_work(&musb->irq_work,
1994 msecs_to_jiffies(1000));
1995 musb->quirk_retries--;
2004 * Check the musb devctl session bit to determine if we want to
2005 * allow PM runtime for the device. In general, we want to keep things
2006 * active when the session bit is set except after host disconnect.
2008 * Only called from musb_irq_work. If this ever needs to get called
2009 * elsewhere, proper locking must be implemented for musb->session.
2011 static void musb_pm_runtime_check_session(struct musb *musb)
2016 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
2018 /* Handle session status quirks first */
2019 s = MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV |
2021 switch (devctl & ~s) {
2022 case MUSB_QUIRK_B_DISCONNECT_99:
2023 musb_state_needs_recheck(musb, devctl,
2024 "Poll devctl in case of suspend after disconnect");
2026 case MUSB_QUIRK_B_INVALID_VBUS_91:
2027 if (musb_state_needs_recheck(musb, devctl,
2028 "Poll devctl on invalid vbus, assume no session"))
2031 case MUSB_QUIRK_A_DISCONNECT_19:
2032 if (musb_state_needs_recheck(musb, devctl,
2033 "Poll devctl on possible host mode disconnect"))
2037 trace_musb_state(musb, devctl, "Allow PM on possible host mode disconnect");
2038 pm_runtime_mark_last_busy(musb->controller);
2039 pm_runtime_put_autosuspend(musb->controller);
2040 musb->session = false;
2046 /* No need to do anything if session has not changed */
2047 s = devctl & MUSB_DEVCTL_SESSION;
2048 if (s == musb->session)
2051 /* Block PM or allow PM? */
2053 trace_musb_state(musb, devctl, "Block PM on active session");
2054 error = pm_runtime_get_sync(musb->controller);
2056 dev_err(musb->controller, "Could not enable: %i\n",
2058 musb->quirk_retries = 3;
2061 * We can get a spurious MUSB_INTR_SESSREQ interrupt on start-up
2062 * in B-peripheral mode with nothing connected and the session
2063 * bit clears silently. Check status again in 3 seconds.
2065 if (devctl & MUSB_DEVCTL_BDEVICE)
2066 schedule_delayed_work(&musb->irq_work,
2067 msecs_to_jiffies(3000));
2069 trace_musb_state(musb, devctl, "Allow PM with no session");
2070 pm_runtime_mark_last_busy(musb->controller);
2071 pm_runtime_put_autosuspend(musb->controller);
2077 /* Only used to provide driver mode change events */
2078 static void musb_irq_work(struct work_struct *data)
2080 struct musb *musb = container_of(data, struct musb, irq_work.work);
2083 error = pm_runtime_resume_and_get(musb->controller);
2085 dev_err(musb->controller, "Could not enable: %i\n", error);
2090 musb_pm_runtime_check_session(musb);
2092 if (musb->xceiv->otg->state != musb->xceiv_old_state) {
2093 musb->xceiv_old_state = musb->xceiv->otg->state;
2094 sysfs_notify(&musb->controller->kobj, NULL, "mode");
2097 pm_runtime_mark_last_busy(musb->controller);
2098 pm_runtime_put_autosuspend(musb->controller);
2101 static void musb_recover_from_babble(struct musb *musb)
2106 musb_disable_interrupts(musb);
2109 * wait at least 320 cycles of 60MHz clock. That's 5.3us, we will give
2110 * it some slack and wait for 10us.
2114 ret = musb_platform_recover(musb);
2116 musb_enable_interrupts(musb);
2120 /* drop session bit */
2121 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
2122 devctl &= ~MUSB_DEVCTL_SESSION;
2123 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
2125 /* tell usbcore about it */
2126 musb_root_disconnect(musb);
2129 * When a babble condition occurs, the musb controller
2130 * removes the session bit and the endpoint config is lost.
2133 ret = ep_config_from_table(musb);
2135 ret = ep_config_from_hw(musb);
2137 /* restart session */
2142 /* --------------------------------------------------------------------------
2146 static struct musb *allocate_instance(struct device *dev,
2147 const struct musb_hdrc_config *config, void __iomem *mbase)
2150 struct musb_hw_ep *ep;
2154 musb = devm_kzalloc(dev, sizeof(*musb), GFP_KERNEL);
2158 INIT_LIST_HEAD(&musb->control);
2159 INIT_LIST_HEAD(&musb->in_bulk);
2160 INIT_LIST_HEAD(&musb->out_bulk);
2161 INIT_LIST_HEAD(&musb->pending_list);
2163 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
2164 musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
2165 musb->mregs = mbase;
2166 musb->ctrl_base = mbase;
2167 musb->nIrq = -ENODEV;
2168 musb->config = config;
2169 BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
2170 for (epnum = 0, ep = musb->endpoints;
2171 epnum < musb->config->num_eps;
2177 musb->controller = dev;
2179 ret = musb_host_alloc(musb);
2183 dev_set_drvdata(dev, musb);
2191 static void musb_free(struct musb *musb)
2193 /* this has multiple entry modes. it handles fault cleanup after
2194 * probe(), where things may be partially set up, as well as rmmod
2195 * cleanup after everything's been de-activated.
2198 if (musb->nIrq >= 0) {
2200 disable_irq_wake(musb->nIrq);
2201 free_irq(musb->nIrq, musb);
2204 musb_host_free(musb);
2207 struct musb_pending_work {
2208 int (*callback)(struct musb *musb, void *data);
2210 struct list_head node;
2215 * Called from musb_runtime_resume(), musb_resume(), and
2216 * musb_queue_resume_work(). Callers must take musb->lock.
2218 static int musb_run_resume_work(struct musb *musb)
2220 struct musb_pending_work *w, *_w;
2221 unsigned long flags;
2224 spin_lock_irqsave(&musb->list_lock, flags);
2225 list_for_each_entry_safe(w, _w, &musb->pending_list, node) {
2227 error = w->callback(musb, w->data);
2229 dev_err(musb->controller,
2230 "resume callback %p failed: %i\n",
2231 w->callback, error);
2235 devm_kfree(musb->controller, w);
2237 spin_unlock_irqrestore(&musb->list_lock, flags);
2244 * Called to run work if device is active or else queue the work to happen
2245 * on resume. Caller must take musb->lock and must hold an RPM reference.
2247 * Note that we cowardly refuse queuing work after musb PM runtime
2248 * resume is done calling musb_run_resume_work() and return -EINPROGRESS
2251 int musb_queue_resume_work(struct musb *musb,
2252 int (*callback)(struct musb *musb, void *data),
2255 struct musb_pending_work *w;
2256 unsigned long flags;
2260 if (WARN_ON(!callback))
2263 spin_lock_irqsave(&musb->list_lock, flags);
2264 is_suspended = musb->is_runtime_suspended;
2267 w = devm_kzalloc(musb->controller, sizeof(*w), GFP_ATOMIC);
2273 w->callback = callback;
2276 list_add_tail(&w->node, &musb->pending_list);
2281 spin_unlock_irqrestore(&musb->list_lock, flags);
2284 error = callback(musb, data);
2288 EXPORT_SYMBOL_GPL(musb_queue_resume_work);
2290 static void musb_deassert_reset(struct work_struct *work)
2293 unsigned long flags;
2295 musb = container_of(work, struct musb, deassert_reset_work.work);
2297 spin_lock_irqsave(&musb->lock, flags);
2299 if (musb->port1_status & USB_PORT_STAT_RESET)
2300 musb_port_reset(musb, false);
2302 spin_unlock_irqrestore(&musb->lock, flags);
2306 * Perform generic per-controller initialization.
2308 * @dev: the controller (already clocked, etc)
2310 * @ctrl: virtual address of controller registers,
2311 * not yet corrected for platform-specific offsets
2314 musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
2318 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
2320 /* The driver might handle more features than the board; OK.
2321 * Fail when the board needs a feature that's not enabled.
2324 dev_err(dev, "no platform_data?\n");
2330 musb = allocate_instance(dev, plat->config, ctrl);
2336 spin_lock_init(&musb->lock);
2337 spin_lock_init(&musb->list_lock);
2338 musb->board_set_power = plat->set_power;
2339 musb->min_power = plat->min_power;
2340 musb->ops = plat->platform_ops;
2341 musb->port_mode = plat->mode;
2344 * Initialize the default IO functions. At least omap2430 needs
2345 * these early. We initialize the platform specific IO functions
2348 musb_readb = musb_default_readb;
2349 musb_writeb = musb_default_writeb;
2350 musb_readw = musb_default_readw;
2351 musb_writew = musb_default_writew;
2353 /* The musb_platform_init() call:
2354 * - adjusts musb->mregs
2355 * - sets the musb->isr
2356 * - may initialize an integrated transceiver
2357 * - initializes musb->xceiv, usually by otg_get_phy()
2358 * - stops powering VBUS
2360 * There are various transceiver configurations.
2361 * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses
2362 * external/discrete ones in various flavors (twl4030 family,
2363 * isp1504, non-OTG, etc) mostly hooking up through ULPI.
2365 status = musb_platform_init(musb);
2375 /* Most devices use indexed offset or flat offset */
2376 if (musb->ops->quirks & MUSB_INDEXED_EP) {
2377 musb->io.ep_offset = musb_indexed_ep_offset;
2378 musb->io.ep_select = musb_indexed_ep_select;
2380 musb->io.ep_offset = musb_flat_ep_offset;
2381 musb->io.ep_select = musb_flat_ep_select;
2384 if (musb->ops->quirks & MUSB_G_NO_SKB_RESERVE)
2385 musb->g.quirk_avoids_skb_reserve = 1;
2387 /* At least tusb6010 has its own offsets */
2388 if (musb->ops->ep_offset)
2389 musb->io.ep_offset = musb->ops->ep_offset;
2390 if (musb->ops->ep_select)
2391 musb->io.ep_select = musb->ops->ep_select;
2393 if (musb->ops->fifo_mode)
2394 fifo_mode = musb->ops->fifo_mode;
2398 if (musb->ops->fifo_offset)
2399 musb->io.fifo_offset = musb->ops->fifo_offset;
2401 musb->io.fifo_offset = musb_default_fifo_offset;
2403 if (musb->ops->busctl_offset)
2404 musb->io.busctl_offset = musb->ops->busctl_offset;
2406 musb->io.busctl_offset = musb_default_busctl_offset;
2408 if (musb->ops->readb)
2409 musb_readb = musb->ops->readb;
2410 if (musb->ops->writeb)
2411 musb_writeb = musb->ops->writeb;
2412 if (musb->ops->clearb)
2413 musb_clearb = musb->ops->clearb;
2415 musb_clearb = musb_readb;
2417 if (musb->ops->readw)
2418 musb_readw = musb->ops->readw;
2419 if (musb->ops->writew)
2420 musb_writew = musb->ops->writew;
2421 if (musb->ops->clearw)
2422 musb_clearw = musb->ops->clearw;
2424 musb_clearw = musb_readw;
2426 #ifndef CONFIG_MUSB_PIO_ONLY
2427 if (!musb->ops->dma_init || !musb->ops->dma_exit) {
2428 dev_err(dev, "DMA controller not set\n");
2432 musb_dma_controller_create = musb->ops->dma_init;
2433 musb_dma_controller_destroy = musb->ops->dma_exit;
2436 if (musb->ops->read_fifo)
2437 musb->io.read_fifo = musb->ops->read_fifo;
2439 musb->io.read_fifo = musb_default_read_fifo;
2441 if (musb->ops->write_fifo)
2442 musb->io.write_fifo = musb->ops->write_fifo;
2444 musb->io.write_fifo = musb_default_write_fifo;
2446 if (musb->ops->get_toggle)
2447 musb->io.get_toggle = musb->ops->get_toggle;
2449 musb->io.get_toggle = musb_default_get_toggle;
2451 if (musb->ops->set_toggle)
2452 musb->io.set_toggle = musb->ops->set_toggle;
2454 musb->io.set_toggle = musb_default_set_toggle;
2456 if (!musb->xceiv->io_ops) {
2457 musb->xceiv->io_dev = musb->controller;
2458 musb->xceiv->io_priv = musb->mregs;
2459 musb->xceiv->io_ops = &musb_ulpi_access;
2462 if (musb->ops->phy_callback)
2463 musb_phy_callback = musb->ops->phy_callback;
2466 * We need musb_read/write functions initialized for PM.
2467 * Note that at least 2430 glue needs autosuspend delay
2468 * somewhere above 300 ms for the hardware to idle properly
2469 * after disconnecting the cable in host mode. Let's use
2470 * 500 ms for some margin.
2472 pm_runtime_use_autosuspend(musb->controller);
2473 pm_runtime_set_autosuspend_delay(musb->controller, 500);
2474 pm_runtime_enable(musb->controller);
2475 pm_runtime_get_sync(musb->controller);
2477 status = usb_phy_init(musb->xceiv);
2479 goto err_usb_phy_init;
2481 if (use_dma && dev->dma_mask) {
2482 musb->dma_controller =
2483 musb_dma_controller_create(musb, musb->mregs);
2484 if (IS_ERR(musb->dma_controller)) {
2485 status = PTR_ERR(musb->dma_controller);
2490 /* be sure interrupts are disabled before connecting ISR */
2491 musb_platform_disable(musb);
2492 musb_disable_interrupts(musb);
2493 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
2495 /* MUSB_POWER_SOFTCONN might be already set, JZ4740 does this. */
2496 musb_writeb(musb->mregs, MUSB_POWER, 0);
2498 /* Init IRQ workqueue before request_irq */
2499 INIT_DELAYED_WORK(&musb->irq_work, musb_irq_work);
2500 INIT_DELAYED_WORK(&musb->deassert_reset_work, musb_deassert_reset);
2501 INIT_DELAYED_WORK(&musb->finish_resume_work, musb_host_finish_resume);
2503 /* setup musb parts of the core (especially endpoints) */
2504 status = musb_core_init(plat->config->multipoint
2505 ? MUSB_CONTROLLER_MHDRC
2506 : MUSB_CONTROLLER_HDRC, musb);
2510 timer_setup(&musb->otg_timer, musb_otg_timer_func, 0);
2512 /* attach to the IRQ */
2513 if (request_irq(nIrq, musb->isr, IRQF_SHARED, dev_name(dev), musb)) {
2514 dev_err(dev, "request_irq %d failed!\n", nIrq);
2519 /* FIXME this handles wakeup irqs wrong */
2520 if (enable_irq_wake(nIrq) == 0) {
2522 device_init_wakeup(dev, 1);
2527 /* program PHY to use external vBus if required */
2528 if (plat->extvbus) {
2529 u8 busctl = musb_readb(musb->mregs, MUSB_ULPI_BUSCONTROL);
2530 busctl |= MUSB_ULPI_USE_EXTVBUS;
2531 musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, busctl);
2534 MUSB_DEV_MODE(musb);
2535 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
2537 switch (musb->port_mode) {
2539 status = musb_host_setup(musb, plat->power);
2542 status = musb_platform_set_mode(musb, MUSB_HOST);
2544 case MUSB_PERIPHERAL:
2545 status = musb_gadget_setup(musb);
2548 status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
2551 status = musb_host_setup(musb, plat->power);
2554 status = musb_gadget_setup(musb);
2556 musb_host_cleanup(musb);
2559 status = musb_platform_set_mode(musb, MUSB_OTG);
2562 dev_err(dev, "unsupported port mode %d\n", musb->port_mode);
2569 musb_init_debugfs(musb);
2571 musb->is_initialized = 1;
2572 pm_runtime_mark_last_busy(musb->controller);
2573 pm_runtime_put_autosuspend(musb->controller);
2578 cancel_delayed_work_sync(&musb->irq_work);
2579 cancel_delayed_work_sync(&musb->finish_resume_work);
2580 cancel_delayed_work_sync(&musb->deassert_reset_work);
2581 if (musb->dma_controller)
2582 musb_dma_controller_destroy(musb->dma_controller);
2585 usb_phy_shutdown(musb->xceiv);
2588 pm_runtime_dont_use_autosuspend(musb->controller);
2589 pm_runtime_put_sync(musb->controller);
2590 pm_runtime_disable(musb->controller);
2594 device_init_wakeup(dev, 0);
2595 musb_platform_exit(musb);
2598 if (status != -EPROBE_DEFER)
2599 dev_err(musb->controller,
2600 "%s failed with status %d\n", __func__, status);
2610 /*-------------------------------------------------------------------------*/
2612 /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just
2613 * bridge to a platform device; this driver then suffices.
2615 static int musb_probe(struct platform_device *pdev)
2617 struct device *dev = &pdev->dev;
2618 int irq = platform_get_irq_byname(pdev, "mc");
2624 base = devm_platform_ioremap_resource(pdev, 0);
2626 return PTR_ERR(base);
2628 return musb_init_controller(dev, irq, base);
2631 static int musb_remove(struct platform_device *pdev)
2633 struct device *dev = &pdev->dev;
2634 struct musb *musb = dev_to_musb(dev);
2635 unsigned long flags;
2637 /* this gets called on rmmod.
2638 * - Host mode: host may still be active
2639 * - Peripheral mode: peripheral is deactivated (or never-activated)
2640 * - OTG mode: both roles are deactivated (or never-activated)
2642 musb_exit_debugfs(musb);
2644 cancel_delayed_work_sync(&musb->irq_work);
2645 cancel_delayed_work_sync(&musb->finish_resume_work);
2646 cancel_delayed_work_sync(&musb->deassert_reset_work);
2647 pm_runtime_get_sync(musb->controller);
2648 musb_host_cleanup(musb);
2649 musb_gadget_cleanup(musb);
2651 musb_platform_disable(musb);
2652 spin_lock_irqsave(&musb->lock, flags);
2653 musb_disable_interrupts(musb);
2654 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
2655 spin_unlock_irqrestore(&musb->lock, flags);
2656 musb_platform_exit(musb);
2658 pm_runtime_dont_use_autosuspend(musb->controller);
2659 pm_runtime_put_sync(musb->controller);
2660 pm_runtime_disable(musb->controller);
2661 musb_phy_callback = NULL;
2662 if (musb->dma_controller)
2663 musb_dma_controller_destroy(musb->dma_controller);
2664 usb_phy_shutdown(musb->xceiv);
2666 device_init_wakeup(dev, 0);
2672 static void musb_save_context(struct musb *musb)
2675 void __iomem *musb_base = musb->mregs;
2678 musb->context.frame = musb_readw(musb_base, MUSB_FRAME);
2679 musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE);
2680 musb->context.busctl = musb_readb(musb_base, MUSB_ULPI_BUSCONTROL);
2681 musb->context.power = musb_readb(musb_base, MUSB_POWER);
2682 musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE);
2683 musb->context.index = musb_readb(musb_base, MUSB_INDEX);
2684 musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL);
2686 for (i = 0; i < musb->config->num_eps; ++i) {
2687 struct musb_hw_ep *hw_ep;
2689 hw_ep = &musb->endpoints[i];
2697 musb_writeb(musb_base, MUSB_INDEX, i);
2698 musb->context.index_regs[i].txmaxp =
2699 musb_readw(epio, MUSB_TXMAXP);
2700 musb->context.index_regs[i].txcsr =
2701 musb_readw(epio, MUSB_TXCSR);
2702 musb->context.index_regs[i].rxmaxp =
2703 musb_readw(epio, MUSB_RXMAXP);
2704 musb->context.index_regs[i].rxcsr =
2705 musb_readw(epio, MUSB_RXCSR);
2707 if (musb->dyn_fifo) {
2708 musb->context.index_regs[i].txfifoadd =
2709 musb_readw(musb_base, MUSB_TXFIFOADD);
2710 musb->context.index_regs[i].rxfifoadd =
2711 musb_readw(musb_base, MUSB_RXFIFOADD);
2712 musb->context.index_regs[i].txfifosz =
2713 musb_readb(musb_base, MUSB_TXFIFOSZ);
2714 musb->context.index_regs[i].rxfifosz =
2715 musb_readb(musb_base, MUSB_RXFIFOSZ);
2718 musb->context.index_regs[i].txtype =
2719 musb_readb(epio, MUSB_TXTYPE);
2720 musb->context.index_regs[i].txinterval =
2721 musb_readb(epio, MUSB_TXINTERVAL);
2722 musb->context.index_regs[i].rxtype =
2723 musb_readb(epio, MUSB_RXTYPE);
2724 musb->context.index_regs[i].rxinterval =
2725 musb_readb(epio, MUSB_RXINTERVAL);
2727 musb->context.index_regs[i].txfunaddr =
2728 musb_read_txfunaddr(musb, i);
2729 musb->context.index_regs[i].txhubaddr =
2730 musb_read_txhubaddr(musb, i);
2731 musb->context.index_regs[i].txhubport =
2732 musb_read_txhubport(musb, i);
2734 musb->context.index_regs[i].rxfunaddr =
2735 musb_read_rxfunaddr(musb, i);
2736 musb->context.index_regs[i].rxhubaddr =
2737 musb_read_rxhubaddr(musb, i);
2738 musb->context.index_regs[i].rxhubport =
2739 musb_read_rxhubport(musb, i);
2743 static void musb_restore_context(struct musb *musb)
2746 void __iomem *musb_base = musb->mregs;
2750 musb_writew(musb_base, MUSB_FRAME, musb->context.frame);
2751 musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode);
2752 musb_writeb(musb_base, MUSB_ULPI_BUSCONTROL, musb->context.busctl);
2754 /* Don't affect SUSPENDM/RESUME bits in POWER reg */
2755 power = musb_readb(musb_base, MUSB_POWER);
2756 power &= MUSB_POWER_SUSPENDM | MUSB_POWER_RESUME;
2757 musb->context.power &= ~(MUSB_POWER_SUSPENDM | MUSB_POWER_RESUME);
2758 power |= musb->context.power;
2759 musb_writeb(musb_base, MUSB_POWER, power);
2761 musb_writew(musb_base, MUSB_INTRTXE, musb->intrtxe);
2762 musb_writew(musb_base, MUSB_INTRRXE, musb->intrrxe);
2763 musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe);
2764 if (musb->context.devctl & MUSB_DEVCTL_SESSION)
2765 musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl);
2767 for (i = 0; i < musb->config->num_eps; ++i) {
2768 struct musb_hw_ep *hw_ep;
2770 hw_ep = &musb->endpoints[i];
2778 musb_writeb(musb_base, MUSB_INDEX, i);
2779 musb_writew(epio, MUSB_TXMAXP,
2780 musb->context.index_regs[i].txmaxp);
2781 musb_writew(epio, MUSB_TXCSR,
2782 musb->context.index_regs[i].txcsr);
2783 musb_writew(epio, MUSB_RXMAXP,
2784 musb->context.index_regs[i].rxmaxp);
2785 musb_writew(epio, MUSB_RXCSR,
2786 musb->context.index_regs[i].rxcsr);
2788 if (musb->dyn_fifo) {
2789 musb_writeb(musb_base, MUSB_TXFIFOSZ,
2790 musb->context.index_regs[i].txfifosz);
2791 musb_writeb(musb_base, MUSB_RXFIFOSZ,
2792 musb->context.index_regs[i].rxfifosz);
2793 musb_writew(musb_base, MUSB_TXFIFOADD,
2794 musb->context.index_regs[i].txfifoadd);
2795 musb_writew(musb_base, MUSB_RXFIFOADD,
2796 musb->context.index_regs[i].rxfifoadd);
2799 musb_writeb(epio, MUSB_TXTYPE,
2800 musb->context.index_regs[i].txtype);
2801 musb_writeb(epio, MUSB_TXINTERVAL,
2802 musb->context.index_regs[i].txinterval);
2803 musb_writeb(epio, MUSB_RXTYPE,
2804 musb->context.index_regs[i].rxtype);
2805 musb_writeb(epio, MUSB_RXINTERVAL,
2807 musb->context.index_regs[i].rxinterval);
2808 musb_write_txfunaddr(musb, i,
2809 musb->context.index_regs[i].txfunaddr);
2810 musb_write_txhubaddr(musb, i,
2811 musb->context.index_regs[i].txhubaddr);
2812 musb_write_txhubport(musb, i,
2813 musb->context.index_regs[i].txhubport);
2815 musb_write_rxfunaddr(musb, i,
2816 musb->context.index_regs[i].rxfunaddr);
2817 musb_write_rxhubaddr(musb, i,
2818 musb->context.index_regs[i].rxhubaddr);
2819 musb_write_rxhubport(musb, i,
2820 musb->context.index_regs[i].rxhubport);
2822 musb_writeb(musb_base, MUSB_INDEX, musb->context.index);
2825 static int musb_suspend(struct device *dev)
2827 struct musb *musb = dev_to_musb(dev);
2828 unsigned long flags;
2831 ret = pm_runtime_get_sync(dev);
2833 pm_runtime_put_noidle(dev);
2837 musb_platform_disable(musb);
2838 musb_disable_interrupts(musb);
2840 musb->flush_irq_work = true;
2841 while (flush_delayed_work(&musb->irq_work))
2843 musb->flush_irq_work = false;
2845 if (!(musb->ops->quirks & MUSB_PRESERVE_SESSION))
2846 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
2848 WARN_ON(!list_empty(&musb->pending_list));
2850 spin_lock_irqsave(&musb->lock, flags);
2852 if (is_peripheral_active(musb)) {
2853 /* FIXME force disconnect unless we know USB will wake
2854 * the system up quickly enough to respond ...
2856 } else if (is_host_active(musb)) {
2857 /* we know all the children are suspended; sometimes
2858 * they will even be wakeup-enabled.
2862 musb_save_context(musb);
2864 spin_unlock_irqrestore(&musb->lock, flags);
2868 static int musb_resume(struct device *dev)
2870 struct musb *musb = dev_to_musb(dev);
2871 unsigned long flags;
2877 * For static cmos like DaVinci, register values were preserved
2878 * unless for some reason the whole soc powered down or the USB
2879 * module got reset through the PSC (vs just being disabled).
2881 * For the DSPS glue layer though, a full register restore has to
2882 * be done. As it shouldn't harm other platforms, we do it
2886 musb_restore_context(musb);
2888 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
2889 mask = MUSB_DEVCTL_BDEVICE | MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV;
2890 if ((devctl & mask) != (musb->context.devctl & mask))
2891 musb->port1_status = 0;
2893 musb_enable_interrupts(musb);
2894 musb_platform_enable(musb);
2896 /* session might be disabled in suspend */
2897 if (musb->port_mode == MUSB_HOST &&
2898 !(musb->ops->quirks & MUSB_PRESERVE_SESSION)) {
2899 devctl |= MUSB_DEVCTL_SESSION;
2900 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
2903 spin_lock_irqsave(&musb->lock, flags);
2904 error = musb_run_resume_work(musb);
2906 dev_err(musb->controller, "resume work failed with %i\n",
2908 spin_unlock_irqrestore(&musb->lock, flags);
2910 pm_runtime_mark_last_busy(dev);
2911 pm_runtime_put_autosuspend(dev);
2916 static int musb_runtime_suspend(struct device *dev)
2918 struct musb *musb = dev_to_musb(dev);
2920 musb_save_context(musb);
2921 musb->is_runtime_suspended = 1;
2926 static int musb_runtime_resume(struct device *dev)
2928 struct musb *musb = dev_to_musb(dev);
2929 unsigned long flags;
2933 * When pm_runtime_get_sync called for the first time in driver
2934 * init, some of the structure is still not initialized which is
2935 * used in restore function. But clock needs to be
2936 * enabled before any register access, so
2937 * pm_runtime_get_sync has to be called.
2938 * Also context restore without save does not make
2941 if (!musb->is_initialized)
2944 musb_restore_context(musb);
2946 spin_lock_irqsave(&musb->lock, flags);
2947 error = musb_run_resume_work(musb);
2949 dev_err(musb->controller, "resume work failed with %i\n",
2951 musb->is_runtime_suspended = 0;
2952 spin_unlock_irqrestore(&musb->lock, flags);
2957 static const struct dev_pm_ops musb_dev_pm_ops = {
2958 .suspend = musb_suspend,
2959 .resume = musb_resume,
2960 .runtime_suspend = musb_runtime_suspend,
2961 .runtime_resume = musb_runtime_resume,
2964 #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops)
2966 #define MUSB_DEV_PM_OPS NULL
2969 static struct platform_driver musb_driver = {
2971 .name = musb_driver_name,
2972 .bus = &platform_bus_type,
2973 .pm = MUSB_DEV_PM_OPS,
2974 .dev_groups = musb_groups,
2976 .probe = musb_probe,
2977 .remove = musb_remove,
2980 module_platform_driver(musb_driver);