2 * TUSB6010 USB 2.0 OTG Dual Role controller
4 * Copyright (C) 2006 Nokia Corporation
5 * Jarkko Nikula <jarkko.nikula@nokia.com>
6 * Tony Lindgren <tony@atomide.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 * - Driver assumes that interface to external host (main CPU) is
14 * configured for NOR FLASH interface instead of VLYNQ serial
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/usb.h>
23 #include <linux/irq.h>
24 #include <linux/platform_device.h>
26 #include "musb_core.h"
28 static void tusb_source_power(struct musb *musb, int is_on);
30 #define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
31 #define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
34 * Checks the revision. We need to use the DMA register as 3.0 does not
35 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
37 u8 tusb_get_revision(struct musb *musb)
39 void __iomem *tbase = musb->ctrl_base;
43 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
44 if (TUSB_REV_MAJOR(rev) == 3) {
45 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
47 if (die_id >= TUSB_DIDR1_HI_REV_31)
54 static int __init tusb_print_revision(struct musb *musb)
56 void __iomem *tbase = musb->ctrl_base;
59 rev = tusb_get_revision(musb);
61 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
63 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
64 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
66 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
67 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
69 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
70 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
72 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
73 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
75 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
77 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
79 return tusb_get_revision(musb);
82 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
83 | TUSB_PHY_OTG_CTRL_TESTM0)
86 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
87 * Disables power detection in PHY for the duration of idle.
89 static void tusb_wbus_quirk(struct musb *musb, int enabled)
91 void __iomem *tbase = musb->ctrl_base;
92 static u32 phy_otg_ctrl, phy_otg_ena;
96 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
97 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
98 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
99 | phy_otg_ena | WBUS_QUIRK_MASK;
100 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
101 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
102 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
103 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
104 DBG(2, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
105 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
106 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
107 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
108 & TUSB_PHY_OTG_CTRL_TESTM2) {
109 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
110 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
111 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
112 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
113 DBG(2, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
114 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
115 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
122 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
123 * so both loading and unloading FIFOs need explicit byte counts.
127 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
133 for (i = 0; i < (len >> 2); i++) {
134 memcpy(&val, buf, 4);
135 musb_writel(fifo, 0, val);
141 /* Write the rest 1 - 3 bytes to FIFO */
142 memcpy(&val, buf, len);
143 musb_writel(fifo, 0, val);
147 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
148 void __iomem *buf, u16 len)
154 for (i = 0; i < (len >> 2); i++) {
155 val = musb_readl(fifo, 0);
156 memcpy(buf, &val, 4);
162 /* Read the rest 1 - 3 bytes from FIFO */
163 val = musb_readl(fifo, 0);
164 memcpy(buf, &val, len);
168 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
170 void __iomem *ep_conf = hw_ep->conf;
171 void __iomem *fifo = hw_ep->fifo;
172 u8 epnum = hw_ep->epnum;
176 DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
177 'T', epnum, fifo, len, buf);
180 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
181 TUSB_EP_CONFIG_XFR_SIZE(len));
183 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
184 TUSB_EP0_CONFIG_XFR_SIZE(len));
186 if (likely((0x01 & (unsigned long) buf) == 0)) {
188 /* Best case is 32bit-aligned destination address */
189 if ((0x02 & (unsigned long) buf) == 0) {
191 writesl(fifo, buf, len >> 2);
192 buf += (len & ~0x03);
200 /* Cannot use writesw, fifo is 32-bit */
201 for (i = 0; i < (len >> 2); i++) {
202 val = (u32)(*(u16 *)buf);
204 val |= (*(u16 *)buf) << 16;
206 musb_writel(fifo, 0, val);
214 tusb_fifo_write_unaligned(fifo, buf, len);
217 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
219 void __iomem *ep_conf = hw_ep->conf;
220 void __iomem *fifo = hw_ep->fifo;
221 u8 epnum = hw_ep->epnum;
223 DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
224 'R', epnum, fifo, len, buf);
227 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
228 TUSB_EP_CONFIG_XFR_SIZE(len));
230 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
232 if (likely((0x01 & (unsigned long) buf) == 0)) {
234 /* Best case is 32bit-aligned destination address */
235 if ((0x02 & (unsigned long) buf) == 0) {
237 readsl(fifo, buf, len >> 2);
238 buf += (len & ~0x03);
246 /* Cannot use readsw, fifo is 32-bit */
247 for (i = 0; i < (len >> 2); i++) {
248 val = musb_readl(fifo, 0);
249 *(u16 *)buf = (u16)(val & 0xffff);
251 *(u16 *)buf = (u16)(val >> 16);
260 tusb_fifo_read_unaligned(fifo, buf, len);
263 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
265 /* This is used by gadget drivers, and OTG transceiver logic, allowing
266 * at most mA current to be drawn from VBUS during a Default-B session
267 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
268 * mode), or low power Default-B sessions, something else supplies power.
269 * Caller must take care of locking.
271 static int tusb_draw_power(struct otg_transceiver *x, unsigned mA)
273 struct musb *musb = container_of(x, struct musb, xceiv);
274 void __iomem *tbase = musb->ctrl_base;
278 * Keep clock active when enabled. Note that this is not tied to
279 * drawing VBUS, as with OTG mA can be less than musb->min_power.
281 if (musb->set_clock) {
283 musb->set_clock(musb->clock, 1);
285 musb->set_clock(musb->clock, 0);
288 /* tps65030 seems to consume max 100mA, with maybe 60mA available
289 * (measured on one board) for things other than tps and tusb.
291 * Boards sharing the CPU clock with CLKIN will need to prevent
292 * certain idle sleep states while the USB link is active.
294 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
295 * The actual current usage would be very board-specific. For now,
296 * it's simpler to just use an aggregate (also board-specific).
298 if (x->default_a || mA < (musb->min_power << 1))
301 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
303 musb->is_bus_powered = 1;
304 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
306 musb->is_bus_powered = 0;
307 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
309 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
311 DBG(2, "draw max %d mA VBUS\n", mA);
316 #define tusb_draw_power NULL
319 /* workaround for issue 13: change clock during chip idle
320 * (to be fixed in rev3 silicon) ... symptoms include disconnect
321 * or looping suspend/resume cycles
323 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
325 void __iomem *tbase = musb->ctrl_base;
328 reg = musb_readl(tbase, TUSB_PRCM_CONF);
329 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
331 /* 0 = refclk (clkin, XI)
332 * 1 = PHY 60 MHz (internal PLL)
337 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
339 musb_writel(tbase, TUSB_PRCM_CONF, reg);
341 /* FIXME tusb6010_platform_retime(mode == 0); */
345 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
346 * Other code ensures that we idle unless we're connected _and_ the
347 * USB link is not suspended ... and tells us the relevant wakeup
348 * events. SW_EN for voltage is handled separately.
350 void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
352 void __iomem *tbase = musb->ctrl_base;
355 if ((wakeup_enables & TUSB_PRCM_WBUS)
356 && (tusb_get_revision(musb) == TUSB_REV_30))
357 tusb_wbus_quirk(musb, 1);
359 tusb_set_clock_source(musb, 0);
361 wakeup_enables |= TUSB_PRCM_WNORCS;
362 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
364 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
365 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
366 * Presumably that's mostly to save power, hence WID is immaterial ...
369 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
370 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
371 if (is_host_active(musb)) {
372 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
373 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
375 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
376 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
378 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
379 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
381 DBG(6, "idle, wake on %02x\n", wakeup_enables);
385 * Updates cable VBUS status. Caller must take care of locking.
387 int musb_platform_get_vbus_status(struct musb *musb)
389 void __iomem *tbase = musb->ctrl_base;
390 u32 otg_stat, prcm_mngmt;
393 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
394 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
396 /* Temporarily enable VBUS detection if it was disabled for
397 * suspend mode. Unless it's enabled otg_stat and devctl will
398 * not show correct VBUS state.
400 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
401 u32 tmp = prcm_mngmt;
402 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
403 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
404 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
405 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
408 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
414 static struct timer_list musb_idle_timer;
416 static void musb_do_idle(unsigned long _musb)
418 struct musb *musb = (void *)_musb;
421 spin_lock_irqsave(&musb->lock, flags);
423 switch (musb->xceiv.state) {
424 case OTG_STATE_A_WAIT_BCON:
425 if ((musb->a_wait_bcon != 0)
426 && (musb->idle_timeout == 0
427 || time_after(jiffies, musb->idle_timeout))) {
428 DBG(4, "Nothing connected %s, turning off VBUS\n",
429 otg_state_string(musb));
432 case OTG_STATE_A_IDLE:
433 tusb_source_power(musb, 0);
438 if (!musb->is_active) {
441 /* wait until khubd handles port change status */
442 if (is_host_active(musb) && (musb->port1_status >> 16))
445 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
446 if (is_peripheral_enabled(musb) && !musb->gadget_driver)
449 wakeups = TUSB_PRCM_WHOSTDISCON
452 if (is_otg_enabled(musb))
453 wakeups |= TUSB_PRCM_WID;
456 wakeups = TUSB_PRCM_WHOSTDISCON | TUSB_PRCM_WBUS;
458 tusb_allow_idle(musb, wakeups);
461 spin_unlock_irqrestore(&musb->lock, flags);
465 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
466 * like "disconnected" or "suspended". We'll be woken out of it by
467 * connect, resume, or disconnect.
469 * Needs to be called as the last function everywhere where there is
470 * register access to TUSB6010 because of NOR flash wake-up.
471 * Caller should own controller spinlock.
473 * Delay because peripheral enables D+ pullup 3msec after SE0, and
474 * we don't want to treat that full speed J as a wakeup event.
475 * ... peripherals must draw only suspend current after 10 msec.
477 void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
479 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
480 static unsigned long last_timer;
483 timeout = default_timeout;
485 /* Never idle if active, or when VBUS timeout is not set as host */
486 if (musb->is_active || ((musb->a_wait_bcon == 0)
487 && (musb->xceiv.state == OTG_STATE_A_WAIT_BCON))) {
488 DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
489 del_timer(&musb_idle_timer);
490 last_timer = jiffies;
494 if (time_after(last_timer, timeout)) {
495 if (!timer_pending(&musb_idle_timer))
496 last_timer = timeout;
498 DBG(4, "Longer idle timer already pending, ignoring\n");
502 last_timer = timeout;
504 DBG(4, "%s inactive, for idle timer for %lu ms\n",
505 otg_state_string(musb),
506 (unsigned long)jiffies_to_msecs(timeout - jiffies));
507 mod_timer(&musb_idle_timer, timeout);
510 /* ticks of 60 MHz clock */
511 #define DEVCLOCK 60000000
512 #define OTG_TIMER_MS(msecs) ((msecs) \
513 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
514 | TUSB_DEV_OTG_TIMER_ENABLE) \
517 static void tusb_source_power(struct musb *musb, int is_on)
519 void __iomem *tbase = musb->ctrl_base;
520 u32 conf, prcm, timer;
523 /* HDRC controls CPEN, but beware current surges during device
524 * connect. They can trigger transient overcurrent conditions
525 * that must be ignored.
528 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
529 conf = musb_readl(tbase, TUSB_DEV_CONF);
530 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
534 musb->set_clock(musb->clock, 1);
535 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
536 musb->xceiv.default_a = 1;
537 musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
538 devctl |= MUSB_DEVCTL_SESSION;
540 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
547 /* If ID pin is grounded, we want to be a_idle */
548 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
549 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
550 switch (musb->xceiv.state) {
551 case OTG_STATE_A_WAIT_VRISE:
552 case OTG_STATE_A_WAIT_BCON:
553 musb->xceiv.state = OTG_STATE_A_WAIT_VFALL;
555 case OTG_STATE_A_WAIT_VFALL:
556 musb->xceiv.state = OTG_STATE_A_IDLE;
559 musb->xceiv.state = OTG_STATE_A_IDLE;
562 musb->xceiv.default_a = 1;
566 musb->xceiv.default_a = 0;
567 musb->xceiv.state = OTG_STATE_B_IDLE;
571 devctl &= ~MUSB_DEVCTL_SESSION;
572 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
574 musb->set_clock(musb->clock, 0);
576 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
578 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
579 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
580 musb_writel(tbase, TUSB_DEV_CONF, conf);
581 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
583 DBG(1, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
584 otg_state_string(musb),
585 musb_readb(musb->mregs, MUSB_DEVCTL),
586 musb_readl(tbase, TUSB_DEV_OTG_STAT),
591 * Sets the mode to OTG, peripheral or host by changing the ID detection.
592 * Caller must take care of locking.
594 * Note that if a mini-A cable is plugged in the ID line will stay down as
595 * the weak ID pull-up is not able to pull the ID up.
597 * REVISIT: It would be possible to add support for changing between host
598 * and peripheral modes in non-OTG configurations by reconfiguring hardware
599 * and then setting musb->board_mode. For now, only support OTG mode.
601 void musb_platform_set_mode(struct musb *musb, u8 musb_mode)
603 void __iomem *tbase = musb->ctrl_base;
604 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
606 if (musb->board_mode != MUSB_OTG) {
607 ERR("Changing mode currently only supported in OTG mode\n");
611 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
612 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
613 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
614 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
618 #ifdef CONFIG_USB_MUSB_HDRC_HCD
619 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
620 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
621 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
622 dev_conf |= TUSB_DEV_CONF_ID_SEL;
623 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
627 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
628 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
629 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
630 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
631 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
635 #ifdef CONFIG_USB_MUSB_OTG
636 case MUSB_OTG: /* Use PHY ID detection */
637 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
638 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
639 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
644 DBG(2, "Trying to set unknown mode %i\n", musb_mode);
647 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
648 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
649 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
650 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
651 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
653 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
654 if ((musb_mode == MUSB_PERIPHERAL) &&
655 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
656 INFO("Cannot be peripheral with mini-A cable "
657 "otg_stat: %08x\n", otg_stat);
660 static inline unsigned long
661 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
663 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
664 unsigned long idle_timeout = 0;
667 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
670 if (is_otg_enabled(musb))
671 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
673 default_a = is_host_enabled(musb);
674 DBG(2, "Default-%c\n", default_a ? 'A' : 'B');
675 musb->xceiv.default_a = default_a;
676 tusb_source_power(musb, default_a);
678 /* Don't allow idling immediately */
680 idle_timeout = jiffies + (HZ * 3);
683 /* VBUS state change */
684 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
686 /* B-dev state machine: no vbus ~= disconnect */
687 if ((is_otg_enabled(musb) && !musb->xceiv.default_a)
688 || !is_host_enabled(musb)) {
689 #ifdef CONFIG_USB_MUSB_HDRC_HCD
690 /* ? musb_root_disconnect(musb); */
691 musb->port1_status &=
692 ~(USB_PORT_STAT_CONNECTION
693 | USB_PORT_STAT_ENABLE
694 | USB_PORT_STAT_LOW_SPEED
695 | USB_PORT_STAT_HIGH_SPEED
700 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
701 DBG(1, "Forcing disconnect (no interrupt)\n");
702 if (musb->xceiv.state != OTG_STATE_B_IDLE) {
703 /* INTR_DISCONNECT can hide... */
704 musb->xceiv.state = OTG_STATE_B_IDLE;
705 musb->int_usb |= MUSB_INTR_DISCONNECT;
709 DBG(2, "vbus change, %s, otg %03x\n",
710 otg_state_string(musb), otg_stat);
711 idle_timeout = jiffies + (1 * HZ);
712 schedule_work(&musb->irq_work);
714 } else /* A-dev state machine */ {
715 DBG(2, "vbus change, %s, otg %03x\n",
716 otg_state_string(musb), otg_stat);
718 switch (musb->xceiv.state) {
719 case OTG_STATE_A_IDLE:
720 DBG(2, "Got SRP, turning on VBUS\n");
721 musb_set_vbus(musb, 1);
723 /* CONNECT can wake if a_wait_bcon is set */
724 if (musb->a_wait_bcon != 0)
730 * OPT FS A TD.4.6 needs few seconds for
733 idle_timeout = jiffies + (2 * HZ);
736 case OTG_STATE_A_WAIT_VRISE:
737 /* ignore; A-session-valid < VBUS_VALID/2,
738 * we monitor this with the timer
741 case OTG_STATE_A_WAIT_VFALL:
742 /* REVISIT this irq triggers during short
743 * spikes caused by enumeration ...
745 if (musb->vbuserr_retry) {
746 musb->vbuserr_retry--;
747 tusb_source_power(musb, 1);
750 = VBUSERR_RETRY_COUNT;
751 tusb_source_power(musb, 0);
760 /* OTG timer expiration */
761 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
764 DBG(4, "%s timer, %03x\n", otg_state_string(musb), otg_stat);
766 switch (musb->xceiv.state) {
767 case OTG_STATE_A_WAIT_VRISE:
768 /* VBUS has probably been valid for a while now,
769 * but may well have bounced out of range a bit
771 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
772 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
773 if ((devctl & MUSB_DEVCTL_VBUS)
774 != MUSB_DEVCTL_VBUS) {
775 DBG(2, "devctl %02x\n", devctl);
778 musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
780 idle_timeout = jiffies
781 + msecs_to_jiffies(musb->a_wait_bcon);
783 /* REVISIT report overcurrent to hub? */
784 ERR("vbus too slow, devctl %02x\n", devctl);
785 tusb_source_power(musb, 0);
788 case OTG_STATE_A_WAIT_BCON:
789 if (musb->a_wait_bcon != 0)
790 idle_timeout = jiffies
791 + msecs_to_jiffies(musb->a_wait_bcon);
793 case OTG_STATE_A_SUSPEND:
795 case OTG_STATE_B_WAIT_ACON:
801 schedule_work(&musb->irq_work);
806 static irqreturn_t tusb_interrupt(int irq, void *__hci)
808 struct musb *musb = __hci;
809 void __iomem *tbase = musb->ctrl_base;
810 unsigned long flags, idle_timeout = 0;
811 u32 int_mask, int_src;
813 spin_lock_irqsave(&musb->lock, flags);
815 /* Mask all interrupts to allow using both edge and level GPIO irq */
816 int_mask = musb_readl(tbase, TUSB_INT_MASK);
817 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
819 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
820 DBG(3, "TUSB IRQ %08x\n", int_src);
822 musb->int_usb = (u8) int_src;
824 /* Acknowledge wake-up source interrupts */
825 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
829 if (tusb_get_revision(musb) == TUSB_REV_30)
830 tusb_wbus_quirk(musb, 0);
832 /* there are issues re-locking the PLL on wakeup ... */
834 /* work around issue 8 */
835 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
836 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
837 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
838 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
841 DBG(6, "TUSB NOR not ready\n");
844 /* work around issue 13 (2nd half) */
845 tusb_set_clock_source(musb, 1);
847 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
848 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
849 if (reg & ~TUSB_PRCM_WNORCS) {
851 schedule_work(&musb->irq_work);
853 DBG(3, "wake %sactive %02x\n",
854 musb->is_active ? "" : "in", reg);
856 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
859 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
860 del_timer(&musb_idle_timer);
862 /* OTG state change reports (annoyingly) not issued by Mentor core */
863 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
864 | TUSB_INT_SRC_OTG_TIMEOUT
865 | TUSB_INT_SRC_ID_STATUS_CHNG))
866 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
868 /* TX dma callback must be handled here, RX dma callback is
869 * handled in tusb_omap_dma_cb.
871 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
872 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
873 u32 real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
875 DBG(3, "DMA IRQ %08x\n", dma_src);
876 real_dma_src = ~real_dma_src & dma_src;
877 if (tusb_dma_omap() && real_dma_src) {
878 int tx_source = (real_dma_src & 0xffff);
881 for (i = 1; i <= 15; i++) {
882 if (tx_source & (1 << i)) {
883 DBG(3, "completing ep%i %s\n", i, "tx");
884 musb_dma_completion(musb, i, 1);
888 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
891 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
892 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
893 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
895 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
896 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
897 musb->int_tx = (musb_src & 0xffff);
903 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
904 musb_interrupt(musb);
906 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
907 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
908 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
910 musb_platform_try_idle(musb, idle_timeout);
912 musb_writel(tbase, TUSB_INT_MASK, int_mask);
913 spin_unlock_irqrestore(&musb->lock, flags);
921 * Enables TUSB6010. Caller must take care of locking.
923 * - Check what is unnecessary in MGC_HdrcStart()
925 void musb_platform_enable(struct musb *musb)
927 void __iomem *tbase = musb->ctrl_base;
929 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
930 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
931 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
933 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
934 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
935 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
936 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
938 /* Clear all subsystem interrups */
939 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
940 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
941 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
943 /* Acknowledge pending interrupt(s) */
944 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
946 /* Only 0 clock cycles for minimum interrupt de-assertion time and
947 * interrupt polarity active low seems to work reliably here */
948 musb_writel(tbase, TUSB_INT_CTRL_CONF,
949 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
951 set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
953 /* maybe force into the Default-A OTG state machine */
954 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
955 & TUSB_DEV_OTG_STAT_ID_STATUS))
956 musb_writel(tbase, TUSB_INT_SRC_SET,
957 TUSB_INT_SRC_ID_STATUS_CHNG);
959 if (is_dma_capable() && dma_off)
960 printk(KERN_WARNING "%s %s: dma not reactivated\n",
967 * Disables TUSB6010. Caller must take care of locking.
969 void musb_platform_disable(struct musb *musb)
971 void __iomem *tbase = musb->ctrl_base;
973 /* FIXME stop DMA, IRQs, timers, ... */
975 /* disable all IRQs */
976 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
977 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
978 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
979 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
981 del_timer(&musb_idle_timer);
983 if (is_dma_capable() && !dma_off) {
984 printk(KERN_WARNING "%s %s: dma still active\n",
991 * Sets up TUSB6010 CPU interface specific signals and registers
992 * Note: Settings optimized for OMAP24xx
994 static void __init tusb_setup_cpu_interface(struct musb *musb)
996 void __iomem *tbase = musb->ctrl_base;
999 * Disable GPIO[5:0] pullups (used as output DMA requests)
1000 * Don't disable GPIO[7:6] as they are needed for wake-up.
1002 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
1004 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
1005 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
1007 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
1008 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
1010 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
1011 * de-assertion time 2 system clocks p 62 */
1012 musb_writel(tbase, TUSB_DMA_REQ_CONF,
1013 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
1014 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
1015 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
1017 /* Set 0 wait count for synchronous burst access */
1018 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
1021 static int __init tusb_start(struct musb *musb)
1023 void __iomem *tbase = musb->ctrl_base;
1025 unsigned long flags;
1028 if (musb->board_set_power)
1029 ret = musb->board_set_power(1);
1031 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1035 spin_lock_irqsave(&musb->lock, flags);
1037 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1038 TUSB_PROD_TEST_RESET_VAL) {
1039 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1043 ret = tusb_print_revision(musb);
1045 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1050 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1051 * NOR FLASH interface is used */
1052 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1054 /* Select PHY free running 60MHz as a system clock */
1055 tusb_set_clock_source(musb, 1);
1057 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1058 * power saving, enable VBus detect and session end comparators,
1059 * enable IDpullup, enable VBus charging */
1060 musb_writel(tbase, TUSB_PRCM_MNGMT,
1061 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1062 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1063 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1064 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1065 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1066 tusb_setup_cpu_interface(musb);
1068 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1069 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1070 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1071 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1073 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1074 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1075 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1077 spin_unlock_irqrestore(&musb->lock, flags);
1082 spin_unlock_irqrestore(&musb->lock, flags);
1084 if (musb->board_set_power)
1085 musb->board_set_power(0);
1090 int __init musb_platform_init(struct musb *musb)
1092 struct platform_device *pdev;
1093 struct resource *mem;
1097 pdev = to_platform_device(musb->controller);
1099 /* dma address for async dma */
1100 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1101 musb->async = mem->start;
1103 /* dma address for sync dma */
1104 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1106 pr_debug("no sync dma resource?\n");
1109 musb->sync = mem->start;
1111 sync = ioremap(mem->start, mem->end - mem->start + 1);
1113 pr_debug("ioremap for sync failed\n");
1116 musb->sync_va = sync;
1118 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1119 * FIFOs at 0x600, TUSB at 0x800
1121 musb->mregs += TUSB_BASE_OFFSET;
1123 ret = tusb_start(musb);
1125 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1129 musb->isr = tusb_interrupt;
1131 if (is_host_enabled(musb))
1132 musb->board_set_vbus = tusb_source_power;
1133 if (is_peripheral_enabled(musb))
1134 musb->xceiv.set_power = tusb_draw_power;
1136 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1141 int musb_platform_exit(struct musb *musb)
1143 del_timer_sync(&musb_idle_timer);
1145 if (musb->board_set_power)
1146 musb->board_set_power(0);
1148 iounmap(musb->sync_va);