2 * TUSB6010 USB 2.0 OTG Dual Role controller
4 * Copyright (C) 2006 Nokia Corporation
5 * Tony Lindgren <tony@atomide.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 * - Driver assumes that interface to external host (main CPU) is
13 * configured for NOR FLASH interface instead of VLYNQ serial
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/err.h>
21 #include <linux/prefetch.h>
22 #include <linux/usb.h>
23 #include <linux/irq.h>
25 #include <linux/device.h>
26 #include <linux/platform_device.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/usb/usb_phy_generic.h>
30 #include "musb_core.h"
32 struct tusb6010_glue {
34 struct platform_device *musb;
35 struct platform_device *phy;
38 static void tusb_musb_set_vbus(struct musb *musb, int is_on);
40 #define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
41 #define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
44 * Checks the revision. We need to use the DMA register as 3.0 does not
45 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
47 static u8 tusb_get_revision(struct musb *musb)
49 void __iomem *tbase = musb->ctrl_base;
53 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
54 if (TUSB_REV_MAJOR(rev) == 3) {
55 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
57 if (die_id >= TUSB_DIDR1_HI_REV_31)
64 static void tusb_print_revision(struct musb *musb)
66 void __iomem *tbase = musb->ctrl_base;
69 rev = musb->tusb_revision;
71 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
73 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
74 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
76 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
77 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
79 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
80 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
82 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
83 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
85 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
87 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
90 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
91 | TUSB_PHY_OTG_CTRL_TESTM0)
94 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
95 * Disables power detection in PHY for the duration of idle.
97 static void tusb_wbus_quirk(struct musb *musb, int enabled)
99 void __iomem *tbase = musb->ctrl_base;
100 static u32 phy_otg_ctrl, phy_otg_ena;
104 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
105 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
106 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
107 | phy_otg_ena | WBUS_QUIRK_MASK;
108 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
109 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
110 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
111 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
112 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
113 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
114 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
115 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
116 & TUSB_PHY_OTG_CTRL_TESTM2) {
117 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
118 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
119 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
120 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
121 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
122 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
123 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
129 static u32 tusb_fifo_offset(u8 epnum)
131 return 0x200 + (epnum * 0x20);
134 static u32 tusb_ep_offset(u8 epnum, u16 offset)
136 return 0x10 + offset;
139 /* TUSB mapping: "flat" plus ep0 special cases */
140 static void tusb_ep_select(void __iomem *mbase, u8 epnum)
142 musb_writeb(mbase, MUSB_INDEX, epnum);
146 * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
148 static u8 tusb_readb(const void __iomem *addr, unsigned offset)
153 tmp = __raw_readw(addr + (offset & ~1));
162 static void tusb_writeb(void __iomem *addr, unsigned offset, u8 data)
166 tmp = __raw_readw(addr + (offset & ~1));
168 tmp = (data << 8) | (tmp & 0xff);
170 tmp = (tmp & 0xff00) | data;
172 __raw_writew(tmp, addr + (offset & ~1));
176 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
177 * so both loading and unloading FIFOs need explicit byte counts.
181 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
187 for (i = 0; i < (len >> 2); i++) {
188 memcpy(&val, buf, 4);
189 musb_writel(fifo, 0, val);
195 /* Write the rest 1 - 3 bytes to FIFO */
197 memcpy(&val, buf, len);
198 musb_writel(fifo, 0, val);
202 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
209 for (i = 0; i < (len >> 2); i++) {
210 val = musb_readl(fifo, 0);
211 memcpy(buf, &val, 4);
217 /* Read the rest 1 - 3 bytes from FIFO */
218 val = musb_readl(fifo, 0);
219 memcpy(buf, &val, len);
223 static void tusb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
225 struct musb *musb = hw_ep->musb;
226 void __iomem *ep_conf = hw_ep->conf;
227 void __iomem *fifo = hw_ep->fifo;
228 u8 epnum = hw_ep->epnum;
232 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
233 'T', epnum, fifo, len, buf);
236 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
237 TUSB_EP_CONFIG_XFR_SIZE(len));
239 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
240 TUSB_EP0_CONFIG_XFR_SIZE(len));
242 if (likely((0x01 & (unsigned long) buf) == 0)) {
244 /* Best case is 32bit-aligned destination address */
245 if ((0x02 & (unsigned long) buf) == 0) {
247 iowrite32_rep(fifo, buf, len >> 2);
248 buf += (len & ~0x03);
256 /* Cannot use writesw, fifo is 32-bit */
257 for (i = 0; i < (len >> 2); i++) {
258 val = (u32)(*(u16 *)buf);
260 val |= (*(u16 *)buf) << 16;
262 musb_writel(fifo, 0, val);
270 tusb_fifo_write_unaligned(fifo, buf, len);
273 static void tusb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
275 struct musb *musb = hw_ep->musb;
276 void __iomem *ep_conf = hw_ep->conf;
277 void __iomem *fifo = hw_ep->fifo;
278 u8 epnum = hw_ep->epnum;
280 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
281 'R', epnum, fifo, len, buf);
284 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
285 TUSB_EP_CONFIG_XFR_SIZE(len));
287 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
289 if (likely((0x01 & (unsigned long) buf) == 0)) {
291 /* Best case is 32bit-aligned destination address */
292 if ((0x02 & (unsigned long) buf) == 0) {
294 ioread32_rep(fifo, buf, len >> 2);
295 buf += (len & ~0x03);
303 /* Cannot use readsw, fifo is 32-bit */
304 for (i = 0; i < (len >> 2); i++) {
305 val = musb_readl(fifo, 0);
306 *(u16 *)buf = (u16)(val & 0xffff);
308 *(u16 *)buf = (u16)(val >> 16);
317 tusb_fifo_read_unaligned(fifo, buf, len);
320 static struct musb *the_musb;
322 /* This is used by gadget drivers, and OTG transceiver logic, allowing
323 * at most mA current to be drawn from VBUS during a Default-B session
324 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
325 * mode), or low power Default-B sessions, something else supplies power.
326 * Caller must take care of locking.
328 static int tusb_draw_power(struct usb_phy *x, unsigned mA)
330 struct musb *musb = the_musb;
331 void __iomem *tbase = musb->ctrl_base;
334 /* tps65030 seems to consume max 100mA, with maybe 60mA available
335 * (measured on one board) for things other than tps and tusb.
337 * Boards sharing the CPU clock with CLKIN will need to prevent
338 * certain idle sleep states while the USB link is active.
340 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
341 * The actual current usage would be very board-specific. For now,
342 * it's simpler to just use an aggregate (also board-specific).
344 if (x->otg->default_a || mA < (musb->min_power << 1))
347 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
349 musb->is_bus_powered = 1;
350 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
352 musb->is_bus_powered = 0;
353 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
355 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
357 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
361 /* workaround for issue 13: change clock during chip idle
362 * (to be fixed in rev3 silicon) ... symptoms include disconnect
363 * or looping suspend/resume cycles
365 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
367 void __iomem *tbase = musb->ctrl_base;
370 reg = musb_readl(tbase, TUSB_PRCM_CONF);
371 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
373 /* 0 = refclk (clkin, XI)
374 * 1 = PHY 60 MHz (internal PLL)
379 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
381 musb_writel(tbase, TUSB_PRCM_CONF, reg);
383 /* FIXME tusb6010_platform_retime(mode == 0); */
387 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
388 * Other code ensures that we idle unless we're connected _and_ the
389 * USB link is not suspended ... and tells us the relevant wakeup
390 * events. SW_EN for voltage is handled separately.
392 static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
394 void __iomem *tbase = musb->ctrl_base;
397 if ((wakeup_enables & TUSB_PRCM_WBUS)
398 && (musb->tusb_revision == TUSB_REV_30))
399 tusb_wbus_quirk(musb, 1);
401 tusb_set_clock_source(musb, 0);
403 wakeup_enables |= TUSB_PRCM_WNORCS;
404 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
406 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
407 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
408 * Presumably that's mostly to save power, hence WID is immaterial ...
411 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
412 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
413 if (is_host_active(musb)) {
414 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
415 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
417 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
418 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
420 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
421 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
423 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
427 * Updates cable VBUS status. Caller must take care of locking.
429 static int tusb_musb_vbus_status(struct musb *musb)
431 void __iomem *tbase = musb->ctrl_base;
432 u32 otg_stat, prcm_mngmt;
435 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
436 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
438 /* Temporarily enable VBUS detection if it was disabled for
439 * suspend mode. Unless it's enabled otg_stat and devctl will
440 * not show correct VBUS state.
442 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
443 u32 tmp = prcm_mngmt;
444 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
445 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
446 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
447 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
450 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
456 static struct timer_list musb_idle_timer;
458 static void musb_do_idle(unsigned long _musb)
460 struct musb *musb = (void *)_musb;
463 spin_lock_irqsave(&musb->lock, flags);
465 switch (musb->xceiv->otg->state) {
466 case OTG_STATE_A_WAIT_BCON:
467 if ((musb->a_wait_bcon != 0)
468 && (musb->idle_timeout == 0
469 || time_after(jiffies, musb->idle_timeout))) {
470 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
471 usb_otg_state_string(musb->xceiv->otg->state));
474 case OTG_STATE_A_IDLE:
475 tusb_musb_set_vbus(musb, 0);
480 if (!musb->is_active) {
483 /* wait until hub_wq handles port change status */
484 if (is_host_active(musb) && (musb->port1_status >> 16))
487 if (!musb->gadget_driver) {
490 wakeups = TUSB_PRCM_WHOSTDISCON
493 wakeups |= TUSB_PRCM_WID;
495 tusb_allow_idle(musb, wakeups);
498 spin_unlock_irqrestore(&musb->lock, flags);
502 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
503 * like "disconnected" or "suspended". We'll be woken out of it by
504 * connect, resume, or disconnect.
506 * Needs to be called as the last function everywhere where there is
507 * register access to TUSB6010 because of NOR flash wake-up.
508 * Caller should own controller spinlock.
510 * Delay because peripheral enables D+ pullup 3msec after SE0, and
511 * we don't want to treat that full speed J as a wakeup event.
512 * ... peripherals must draw only suspend current after 10 msec.
514 static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
516 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
517 static unsigned long last_timer;
520 timeout = default_timeout;
522 /* Never idle if active, or when VBUS timeout is not set as host */
523 if (musb->is_active || ((musb->a_wait_bcon == 0)
524 && (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON))) {
525 dev_dbg(musb->controller, "%s active, deleting timer\n",
526 usb_otg_state_string(musb->xceiv->otg->state));
527 del_timer(&musb_idle_timer);
528 last_timer = jiffies;
532 if (time_after(last_timer, timeout)) {
533 if (!timer_pending(&musb_idle_timer))
534 last_timer = timeout;
536 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
540 last_timer = timeout;
542 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
543 usb_otg_state_string(musb->xceiv->otg->state),
544 (unsigned long)jiffies_to_msecs(timeout - jiffies));
545 mod_timer(&musb_idle_timer, timeout);
548 /* ticks of 60 MHz clock */
549 #define DEVCLOCK 60000000
550 #define OTG_TIMER_MS(msecs) ((msecs) \
551 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
552 | TUSB_DEV_OTG_TIMER_ENABLE) \
555 static void tusb_musb_set_vbus(struct musb *musb, int is_on)
557 void __iomem *tbase = musb->ctrl_base;
558 u32 conf, prcm, timer;
560 struct usb_otg *otg = musb->xceiv->otg;
562 /* HDRC controls CPEN, but beware current surges during device
563 * connect. They can trigger transient overcurrent conditions
564 * that must be ignored.
567 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
568 conf = musb_readl(tbase, TUSB_DEV_CONF);
569 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
572 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
574 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
575 devctl |= MUSB_DEVCTL_SESSION;
577 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
584 /* If ID pin is grounded, we want to be a_idle */
585 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
586 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
587 switch (musb->xceiv->otg->state) {
588 case OTG_STATE_A_WAIT_VRISE:
589 case OTG_STATE_A_WAIT_BCON:
590 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
592 case OTG_STATE_A_WAIT_VFALL:
593 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
596 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
604 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
608 devctl &= ~MUSB_DEVCTL_SESSION;
609 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
611 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
613 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
614 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
615 musb_writel(tbase, TUSB_DEV_CONF, conf);
616 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
618 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
619 usb_otg_state_string(musb->xceiv->otg->state),
620 musb_readb(musb->mregs, MUSB_DEVCTL),
621 musb_readl(tbase, TUSB_DEV_OTG_STAT),
626 * Sets the mode to OTG, peripheral or host by changing the ID detection.
627 * Caller must take care of locking.
629 * Note that if a mini-A cable is plugged in the ID line will stay down as
630 * the weak ID pull-up is not able to pull the ID up.
632 static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
634 void __iomem *tbase = musb->ctrl_base;
635 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
637 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
638 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
639 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
640 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
644 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
645 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
646 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
647 dev_conf |= TUSB_DEV_CONF_ID_SEL;
648 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
650 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
651 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
652 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
653 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
655 case MUSB_OTG: /* Use PHY ID detection */
656 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
657 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
658 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
662 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
666 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
667 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
668 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
669 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
670 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
672 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
673 if ((musb_mode == MUSB_PERIPHERAL) &&
674 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
675 INFO("Cannot be peripheral with mini-A cable "
676 "otg_stat: %08x\n", otg_stat);
681 static inline unsigned long
682 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
684 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
685 unsigned long idle_timeout = 0;
686 struct usb_otg *otg = musb->xceiv->otg;
689 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
692 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
693 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
694 otg->default_a = default_a;
695 tusb_musb_set_vbus(musb, default_a);
697 /* Don't allow idling immediately */
699 idle_timeout = jiffies + (HZ * 3);
702 /* VBUS state change */
703 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
705 /* B-dev state machine: no vbus ~= disconnect */
706 if (!otg->default_a) {
707 /* ? musb_root_disconnect(musb); */
708 musb->port1_status &=
709 ~(USB_PORT_STAT_CONNECTION
710 | USB_PORT_STAT_ENABLE
711 | USB_PORT_STAT_LOW_SPEED
712 | USB_PORT_STAT_HIGH_SPEED
716 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
717 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
718 if (musb->xceiv->otg->state != OTG_STATE_B_IDLE) {
719 /* INTR_DISCONNECT can hide... */
720 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
721 musb->int_usb |= MUSB_INTR_DISCONNECT;
725 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
726 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
727 idle_timeout = jiffies + (1 * HZ);
728 schedule_delayed_work(&musb->irq_work, 0);
730 } else /* A-dev state machine */ {
731 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
732 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
734 switch (musb->xceiv->otg->state) {
735 case OTG_STATE_A_IDLE:
736 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
737 musb_platform_set_vbus(musb, 1);
739 /* CONNECT can wake if a_wait_bcon is set */
740 if (musb->a_wait_bcon != 0)
746 * OPT FS A TD.4.6 needs few seconds for
749 idle_timeout = jiffies + (2 * HZ);
752 case OTG_STATE_A_WAIT_VRISE:
753 /* ignore; A-session-valid < VBUS_VALID/2,
754 * we monitor this with the timer
757 case OTG_STATE_A_WAIT_VFALL:
758 /* REVISIT this irq triggers during short
759 * spikes caused by enumeration ...
761 if (musb->vbuserr_retry) {
762 musb->vbuserr_retry--;
763 tusb_musb_set_vbus(musb, 1);
766 = VBUSERR_RETRY_COUNT;
767 tusb_musb_set_vbus(musb, 0);
776 /* OTG timer expiration */
777 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
780 dev_dbg(musb->controller, "%s timer, %03x\n",
781 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
783 switch (musb->xceiv->otg->state) {
784 case OTG_STATE_A_WAIT_VRISE:
785 /* VBUS has probably been valid for a while now,
786 * but may well have bounced out of range a bit
788 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
789 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
790 if ((devctl & MUSB_DEVCTL_VBUS)
791 != MUSB_DEVCTL_VBUS) {
792 dev_dbg(musb->controller, "devctl %02x\n", devctl);
795 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
797 idle_timeout = jiffies
798 + msecs_to_jiffies(musb->a_wait_bcon);
800 /* REVISIT report overcurrent to hub? */
801 ERR("vbus too slow, devctl %02x\n", devctl);
802 tusb_musb_set_vbus(musb, 0);
805 case OTG_STATE_A_WAIT_BCON:
806 if (musb->a_wait_bcon != 0)
807 idle_timeout = jiffies
808 + msecs_to_jiffies(musb->a_wait_bcon);
810 case OTG_STATE_A_SUSPEND:
812 case OTG_STATE_B_WAIT_ACON:
818 schedule_delayed_work(&musb->irq_work, 0);
823 static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
825 struct musb *musb = __hci;
826 void __iomem *tbase = musb->ctrl_base;
827 unsigned long flags, idle_timeout = 0;
828 u32 int_mask, int_src;
830 spin_lock_irqsave(&musb->lock, flags);
832 /* Mask all interrupts to allow using both edge and level GPIO irq */
833 int_mask = musb_readl(tbase, TUSB_INT_MASK);
834 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
836 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
837 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
839 musb->int_usb = (u8) int_src;
841 /* Acknowledge wake-up source interrupts */
842 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
846 if (musb->tusb_revision == TUSB_REV_30)
847 tusb_wbus_quirk(musb, 0);
849 /* there are issues re-locking the PLL on wakeup ... */
851 /* work around issue 8 */
852 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
853 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
854 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
855 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
858 dev_dbg(musb->controller, "TUSB NOR not ready\n");
861 /* work around issue 13 (2nd half) */
862 tusb_set_clock_source(musb, 1);
864 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
865 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
866 if (reg & ~TUSB_PRCM_WNORCS) {
868 schedule_delayed_work(&musb->irq_work, 0);
870 dev_dbg(musb->controller, "wake %sactive %02x\n",
871 musb->is_active ? "" : "in", reg);
873 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
876 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
877 del_timer(&musb_idle_timer);
879 /* OTG state change reports (annoyingly) not issued by Mentor core */
880 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
881 | TUSB_INT_SRC_OTG_TIMEOUT
882 | TUSB_INT_SRC_ID_STATUS_CHNG))
883 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
886 * Just clear the DMA interrupt if it comes as the completion for both
887 * TX and RX is handled by the DMA callback in tusb6010_omap
889 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
890 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
892 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
893 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
896 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
897 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
898 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
900 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
901 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
902 musb->int_tx = (musb_src & 0xffff);
908 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
909 musb_interrupt(musb);
911 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
912 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
913 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
915 tusb_musb_try_idle(musb, idle_timeout);
917 musb_writel(tbase, TUSB_INT_MASK, int_mask);
918 spin_unlock_irqrestore(&musb->lock, flags);
926 * Enables TUSB6010. Caller must take care of locking.
928 * - Check what is unnecessary in MGC_HdrcStart()
930 static void tusb_musb_enable(struct musb *musb)
932 void __iomem *tbase = musb->ctrl_base;
934 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
935 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
936 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
938 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
939 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
940 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
941 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
943 /* Clear all subsystem interrups */
944 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
945 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
946 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
948 /* Acknowledge pending interrupt(s) */
949 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
951 /* Only 0 clock cycles for minimum interrupt de-assertion time and
952 * interrupt polarity active low seems to work reliably here */
953 musb_writel(tbase, TUSB_INT_CTRL_CONF,
954 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
956 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
958 /* maybe force into the Default-A OTG state machine */
959 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
960 & TUSB_DEV_OTG_STAT_ID_STATUS))
961 musb_writel(tbase, TUSB_INT_SRC_SET,
962 TUSB_INT_SRC_ID_STATUS_CHNG);
964 if (is_dma_capable() && dma_off)
965 printk(KERN_WARNING "%s %s: dma not reactivated\n",
972 * Disables TUSB6010. Caller must take care of locking.
974 static void tusb_musb_disable(struct musb *musb)
976 void __iomem *tbase = musb->ctrl_base;
978 /* FIXME stop DMA, IRQs, timers, ... */
980 /* disable all IRQs */
981 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
982 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
983 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
984 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
986 del_timer(&musb_idle_timer);
988 if (is_dma_capable() && !dma_off) {
989 printk(KERN_WARNING "%s %s: dma still active\n",
996 * Sets up TUSB6010 CPU interface specific signals and registers
997 * Note: Settings optimized for OMAP24xx
999 static void tusb_setup_cpu_interface(struct musb *musb)
1001 void __iomem *tbase = musb->ctrl_base;
1004 * Disable GPIO[5:0] pullups (used as output DMA requests)
1005 * Don't disable GPIO[7:6] as they are needed for wake-up.
1007 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
1009 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
1010 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
1012 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
1013 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
1015 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
1016 * de-assertion time 2 system clocks p 62 */
1017 musb_writel(tbase, TUSB_DMA_REQ_CONF,
1018 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
1019 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
1020 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
1022 /* Set 0 wait count for synchronous burst access */
1023 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
1026 static int tusb_musb_start(struct musb *musb)
1028 void __iomem *tbase = musb->ctrl_base;
1030 unsigned long flags;
1033 if (musb->board_set_power)
1034 ret = musb->board_set_power(1);
1036 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1040 spin_lock_irqsave(&musb->lock, flags);
1042 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1043 TUSB_PROD_TEST_RESET_VAL) {
1044 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1048 musb->tusb_revision = tusb_get_revision(musb);
1049 tusb_print_revision(musb);
1050 if (musb->tusb_revision < 2) {
1051 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1052 musb->tusb_revision);
1056 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1057 * NOR FLASH interface is used */
1058 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1060 /* Select PHY free running 60MHz as a system clock */
1061 tusb_set_clock_source(musb, 1);
1063 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1064 * power saving, enable VBus detect and session end comparators,
1065 * enable IDpullup, enable VBus charging */
1066 musb_writel(tbase, TUSB_PRCM_MNGMT,
1067 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1068 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1069 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1070 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1071 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1072 tusb_setup_cpu_interface(musb);
1074 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1075 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1076 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1077 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1079 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1080 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1081 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1083 spin_unlock_irqrestore(&musb->lock, flags);
1088 spin_unlock_irqrestore(&musb->lock, flags);
1090 if (musb->board_set_power)
1091 musb->board_set_power(0);
1096 static int tusb_musb_init(struct musb *musb)
1098 struct platform_device *pdev;
1099 struct resource *mem;
1100 void __iomem *sync = NULL;
1103 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
1104 if (IS_ERR_OR_NULL(musb->xceiv))
1105 return -EPROBE_DEFER;
1107 pdev = to_platform_device(musb->controller);
1109 /* dma address for async dma */
1110 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1111 musb->async = mem->start;
1113 /* dma address for sync dma */
1114 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1116 pr_debug("no sync dma resource?\n");
1120 musb->sync = mem->start;
1122 sync = ioremap(mem->start, resource_size(mem));
1124 pr_debug("ioremap for sync failed\n");
1128 musb->sync_va = sync;
1130 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1131 * FIFOs at 0x600, TUSB at 0x800
1133 musb->mregs += TUSB_BASE_OFFSET;
1135 ret = tusb_musb_start(musb);
1137 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1141 musb->isr = tusb_musb_interrupt;
1143 musb->xceiv->set_power = tusb_draw_power;
1146 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1153 usb_put_phy(musb->xceiv);
1158 static int tusb_musb_exit(struct musb *musb)
1160 del_timer_sync(&musb_idle_timer);
1163 if (musb->board_set_power)
1164 musb->board_set_power(0);
1166 iounmap(musb->sync_va);
1168 usb_put_phy(musb->xceiv);
1172 static const struct musb_platform_ops tusb_ops = {
1173 .quirks = MUSB_DMA_TUSB_OMAP | MUSB_IN_TUSB |
1174 MUSB_G_NO_SKB_RESERVE,
1175 .init = tusb_musb_init,
1176 .exit = tusb_musb_exit,
1178 .ep_offset = tusb_ep_offset,
1179 .ep_select = tusb_ep_select,
1180 .fifo_offset = tusb_fifo_offset,
1181 .readb = tusb_readb,
1182 .writeb = tusb_writeb,
1183 .read_fifo = tusb_read_fifo,
1184 .write_fifo = tusb_write_fifo,
1185 #ifdef CONFIG_USB_TUSB_OMAP_DMA
1186 .dma_init = tusb_dma_controller_create,
1187 .dma_exit = tusb_dma_controller_destroy,
1189 .enable = tusb_musb_enable,
1190 .disable = tusb_musb_disable,
1192 .set_mode = tusb_musb_set_mode,
1193 .try_idle = tusb_musb_try_idle,
1195 .vbus_status = tusb_musb_vbus_status,
1196 .set_vbus = tusb_musb_set_vbus,
1199 static const struct platform_device_info tusb_dev_info = {
1200 .name = "musb-hdrc",
1201 .id = PLATFORM_DEVID_AUTO,
1202 .dma_mask = DMA_BIT_MASK(32),
1205 static int tusb_probe(struct platform_device *pdev)
1207 struct resource musb_resources[3];
1208 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
1209 struct platform_device *musb;
1210 struct tusb6010_glue *glue;
1211 struct platform_device_info pinfo;
1214 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
1218 glue->dev = &pdev->dev;
1220 pdata->platform_ops = &tusb_ops;
1222 usb_phy_generic_register();
1223 platform_set_drvdata(pdev, glue);
1225 memset(musb_resources, 0x00, sizeof(*musb_resources) *
1226 ARRAY_SIZE(musb_resources));
1228 musb_resources[0].name = pdev->resource[0].name;
1229 musb_resources[0].start = pdev->resource[0].start;
1230 musb_resources[0].end = pdev->resource[0].end;
1231 musb_resources[0].flags = pdev->resource[0].flags;
1233 musb_resources[1].name = pdev->resource[1].name;
1234 musb_resources[1].start = pdev->resource[1].start;
1235 musb_resources[1].end = pdev->resource[1].end;
1236 musb_resources[1].flags = pdev->resource[1].flags;
1238 musb_resources[2].name = pdev->resource[2].name;
1239 musb_resources[2].start = pdev->resource[2].start;
1240 musb_resources[2].end = pdev->resource[2].end;
1241 musb_resources[2].flags = pdev->resource[2].flags;
1243 pinfo = tusb_dev_info;
1244 pinfo.parent = &pdev->dev;
1245 pinfo.res = musb_resources;
1246 pinfo.num_res = ARRAY_SIZE(musb_resources);
1248 pinfo.size_data = sizeof(*pdata);
1250 glue->musb = musb = platform_device_register_full(&pinfo);
1252 ret = PTR_ERR(musb);
1253 dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
1260 static int tusb_remove(struct platform_device *pdev)
1262 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
1264 platform_device_unregister(glue->musb);
1265 usb_phy_generic_unregister(glue->phy);
1270 static struct platform_driver tusb_driver = {
1271 .probe = tusb_probe,
1272 .remove = tusb_remove,
1274 .name = "musb-tusb",
1278 MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1279 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1280 MODULE_LICENSE("GPL v2");
1281 module_platform_driver(tusb_driver);