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Merge branch 'atag_offset' of git://git.linaro.org/people/nico/linux into devel-stable
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / musb / tusb6010.c
1 /*
2 * TUSB6010 USB 2.0 OTG Dual Role controller
3 *
4 * Copyright (C) 2006 Nokia Corporation
5 * Tony Lindgren <tony@atomide.com>
6 *
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.
10 *
11 * Notes:
12 * - Driver assumes that interface to external host (main CPU) is
13 * configured for NOR FLASH interface instead of VLYNQ serial
14 * interface.
15 */
16
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/usb.h>
22 #include <linux/irq.h>
23 #include <linux/platform_device.h>
24 #include <linux/dma-mapping.h>
25
26 #include "musb_core.h"
27
28 struct tusb6010_glue {
29 struct device *dev;
30 struct platform_device *musb;
31 };
32
33 static void tusb_musb_set_vbus(struct musb *musb, int is_on);
34
35 #define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
36 #define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
37
38 /*
39 * Checks the revision. We need to use the DMA register as 3.0 does not
40 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
41 */
42 u8 tusb_get_revision(struct musb *musb)
43 {
44 void __iomem *tbase = musb->ctrl_base;
45 u32 die_id;
46 u8 rev;
47
48 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
49 if (TUSB_REV_MAJOR(rev) == 3) {
50 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
51 TUSB_DIDR1_HI));
52 if (die_id >= TUSB_DIDR1_HI_REV_31)
53 rev |= 1;
54 }
55
56 return rev;
57 }
58
59 static int tusb_print_revision(struct musb *musb)
60 {
61 void __iomem *tbase = musb->ctrl_base;
62 u8 rev;
63
64 rev = tusb_get_revision(musb);
65
66 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
67 "prcm",
68 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
69 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
70 "int",
71 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
72 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
73 "gpio",
74 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
75 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
76 "dma",
77 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
78 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
79 "dieid",
80 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
81 "rev",
82 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
83
84 return tusb_get_revision(musb);
85 }
86
87 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
88 | TUSB_PHY_OTG_CTRL_TESTM0)
89
90 /*
91 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
92 * Disables power detection in PHY for the duration of idle.
93 */
94 static void tusb_wbus_quirk(struct musb *musb, int enabled)
95 {
96 void __iomem *tbase = musb->ctrl_base;
97 static u32 phy_otg_ctrl, phy_otg_ena;
98 u32 tmp;
99
100 if (enabled) {
101 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
102 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
103 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
104 | phy_otg_ena | WBUS_QUIRK_MASK;
105 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
106 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
107 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
108 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
109 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
110 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
111 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
112 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
113 & TUSB_PHY_OTG_CTRL_TESTM2) {
114 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
115 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
116 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
117 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
118 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
119 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
120 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
121 phy_otg_ctrl = 0;
122 phy_otg_ena = 0;
123 }
124 }
125
126 /*
127 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
128 * so both loading and unloading FIFOs need explicit byte counts.
129 */
130
131 static inline void
132 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
133 {
134 u32 val;
135 int i;
136
137 if (len > 4) {
138 for (i = 0; i < (len >> 2); i++) {
139 memcpy(&val, buf, 4);
140 musb_writel(fifo, 0, val);
141 buf += 4;
142 }
143 len %= 4;
144 }
145 if (len > 0) {
146 /* Write the rest 1 - 3 bytes to FIFO */
147 memcpy(&val, buf, len);
148 musb_writel(fifo, 0, val);
149 }
150 }
151
152 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
153 void __iomem *buf, u16 len)
154 {
155 u32 val;
156 int i;
157
158 if (len > 4) {
159 for (i = 0; i < (len >> 2); i++) {
160 val = musb_readl(fifo, 0);
161 memcpy(buf, &val, 4);
162 buf += 4;
163 }
164 len %= 4;
165 }
166 if (len > 0) {
167 /* Read the rest 1 - 3 bytes from FIFO */
168 val = musb_readl(fifo, 0);
169 memcpy(buf, &val, len);
170 }
171 }
172
173 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
174 {
175 struct musb *musb = hw_ep->musb;
176 void __iomem *ep_conf = hw_ep->conf;
177 void __iomem *fifo = hw_ep->fifo;
178 u8 epnum = hw_ep->epnum;
179
180 prefetch(buf);
181
182 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
183 'T', epnum, fifo, len, buf);
184
185 if (epnum)
186 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
187 TUSB_EP_CONFIG_XFR_SIZE(len));
188 else
189 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
190 TUSB_EP0_CONFIG_XFR_SIZE(len));
191
192 if (likely((0x01 & (unsigned long) buf) == 0)) {
193
194 /* Best case is 32bit-aligned destination address */
195 if ((0x02 & (unsigned long) buf) == 0) {
196 if (len >= 4) {
197 writesl(fifo, buf, len >> 2);
198 buf += (len & ~0x03);
199 len &= 0x03;
200 }
201 } else {
202 if (len >= 2) {
203 u32 val;
204 int i;
205
206 /* Cannot use writesw, fifo is 32-bit */
207 for (i = 0; i < (len >> 2); i++) {
208 val = (u32)(*(u16 *)buf);
209 buf += 2;
210 val |= (*(u16 *)buf) << 16;
211 buf += 2;
212 musb_writel(fifo, 0, val);
213 }
214 len &= 0x03;
215 }
216 }
217 }
218
219 if (len > 0)
220 tusb_fifo_write_unaligned(fifo, buf, len);
221 }
222
223 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
224 {
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;
229
230 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
231 'R', epnum, fifo, len, buf);
232
233 if (epnum)
234 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
235 TUSB_EP_CONFIG_XFR_SIZE(len));
236 else
237 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
238
239 if (likely((0x01 & (unsigned long) buf) == 0)) {
240
241 /* Best case is 32bit-aligned destination address */
242 if ((0x02 & (unsigned long) buf) == 0) {
243 if (len >= 4) {
244 readsl(fifo, buf, len >> 2);
245 buf += (len & ~0x03);
246 len &= 0x03;
247 }
248 } else {
249 if (len >= 2) {
250 u32 val;
251 int i;
252
253 /* Cannot use readsw, fifo is 32-bit */
254 for (i = 0; i < (len >> 2); i++) {
255 val = musb_readl(fifo, 0);
256 *(u16 *)buf = (u16)(val & 0xffff);
257 buf += 2;
258 *(u16 *)buf = (u16)(val >> 16);
259 buf += 2;
260 }
261 len &= 0x03;
262 }
263 }
264 }
265
266 if (len > 0)
267 tusb_fifo_read_unaligned(fifo, buf, len);
268 }
269
270 static struct musb *the_musb;
271
272 /* This is used by gadget drivers, and OTG transceiver logic, allowing
273 * at most mA current to be drawn from VBUS during a Default-B session
274 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
275 * mode), or low power Default-B sessions, something else supplies power.
276 * Caller must take care of locking.
277 */
278 static int tusb_draw_power(struct otg_transceiver *x, unsigned mA)
279 {
280 struct musb *musb = the_musb;
281 void __iomem *tbase = musb->ctrl_base;
282 u32 reg;
283
284 /* tps65030 seems to consume max 100mA, with maybe 60mA available
285 * (measured on one board) for things other than tps and tusb.
286 *
287 * Boards sharing the CPU clock with CLKIN will need to prevent
288 * certain idle sleep states while the USB link is active.
289 *
290 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
291 * The actual current usage would be very board-specific. For now,
292 * it's simpler to just use an aggregate (also board-specific).
293 */
294 if (x->default_a || mA < (musb->min_power << 1))
295 mA = 0;
296
297 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
298 if (mA) {
299 musb->is_bus_powered = 1;
300 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
301 } else {
302 musb->is_bus_powered = 0;
303 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
304 }
305 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
306
307 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
308 return 0;
309 }
310
311 /* workaround for issue 13: change clock during chip idle
312 * (to be fixed in rev3 silicon) ... symptoms include disconnect
313 * or looping suspend/resume cycles
314 */
315 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
316 {
317 void __iomem *tbase = musb->ctrl_base;
318 u32 reg;
319
320 reg = musb_readl(tbase, TUSB_PRCM_CONF);
321 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
322
323 /* 0 = refclk (clkin, XI)
324 * 1 = PHY 60 MHz (internal PLL)
325 * 2 = not supported
326 * 3 = what?
327 */
328 if (mode > 0)
329 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
330
331 musb_writel(tbase, TUSB_PRCM_CONF, reg);
332
333 /* FIXME tusb6010_platform_retime(mode == 0); */
334 }
335
336 /*
337 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
338 * Other code ensures that we idle unless we're connected _and_ the
339 * USB link is not suspended ... and tells us the relevant wakeup
340 * events. SW_EN for voltage is handled separately.
341 */
342 static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
343 {
344 void __iomem *tbase = musb->ctrl_base;
345 u32 reg;
346
347 if ((wakeup_enables & TUSB_PRCM_WBUS)
348 && (tusb_get_revision(musb) == TUSB_REV_30))
349 tusb_wbus_quirk(musb, 1);
350
351 tusb_set_clock_source(musb, 0);
352
353 wakeup_enables |= TUSB_PRCM_WNORCS;
354 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
355
356 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
357 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
358 * Presumably that's mostly to save power, hence WID is immaterial ...
359 */
360
361 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
362 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
363 if (is_host_active(musb)) {
364 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
365 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
366 } else {
367 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
368 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
369 }
370 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
371 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
372
373 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
374 }
375
376 /*
377 * Updates cable VBUS status. Caller must take care of locking.
378 */
379 static int tusb_musb_vbus_status(struct musb *musb)
380 {
381 void __iomem *tbase = musb->ctrl_base;
382 u32 otg_stat, prcm_mngmt;
383 int ret = 0;
384
385 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
386 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
387
388 /* Temporarily enable VBUS detection if it was disabled for
389 * suspend mode. Unless it's enabled otg_stat and devctl will
390 * not show correct VBUS state.
391 */
392 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
393 u32 tmp = prcm_mngmt;
394 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
395 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
396 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
397 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
398 }
399
400 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
401 ret = 1;
402
403 return ret;
404 }
405
406 static struct timer_list musb_idle_timer;
407
408 static void musb_do_idle(unsigned long _musb)
409 {
410 struct musb *musb = (void *)_musb;
411 unsigned long flags;
412
413 spin_lock_irqsave(&musb->lock, flags);
414
415 switch (musb->xceiv->state) {
416 case OTG_STATE_A_WAIT_BCON:
417 if ((musb->a_wait_bcon != 0)
418 && (musb->idle_timeout == 0
419 || time_after(jiffies, musb->idle_timeout))) {
420 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
421 otg_state_string(musb->xceiv->state));
422 }
423 /* FALLTHROUGH */
424 case OTG_STATE_A_IDLE:
425 tusb_musb_set_vbus(musb, 0);
426 default:
427 break;
428 }
429
430 if (!musb->is_active) {
431 u32 wakeups;
432
433 /* wait until khubd handles port change status */
434 if (is_host_active(musb) && (musb->port1_status >> 16))
435 goto done;
436
437 if (is_peripheral_enabled(musb) && !musb->gadget_driver) {
438 wakeups = 0;
439 } else {
440 wakeups = TUSB_PRCM_WHOSTDISCON
441 | TUSB_PRCM_WBUS
442 | TUSB_PRCM_WVBUS;
443 if (is_otg_enabled(musb))
444 wakeups |= TUSB_PRCM_WID;
445 }
446 tusb_allow_idle(musb, wakeups);
447 }
448 done:
449 spin_unlock_irqrestore(&musb->lock, flags);
450 }
451
452 /*
453 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
454 * like "disconnected" or "suspended". We'll be woken out of it by
455 * connect, resume, or disconnect.
456 *
457 * Needs to be called as the last function everywhere where there is
458 * register access to TUSB6010 because of NOR flash wake-up.
459 * Caller should own controller spinlock.
460 *
461 * Delay because peripheral enables D+ pullup 3msec after SE0, and
462 * we don't want to treat that full speed J as a wakeup event.
463 * ... peripherals must draw only suspend current after 10 msec.
464 */
465 static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
466 {
467 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
468 static unsigned long last_timer;
469
470 if (timeout == 0)
471 timeout = default_timeout;
472
473 /* Never idle if active, or when VBUS timeout is not set as host */
474 if (musb->is_active || ((musb->a_wait_bcon == 0)
475 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
476 dev_dbg(musb->controller, "%s active, deleting timer\n",
477 otg_state_string(musb->xceiv->state));
478 del_timer(&musb_idle_timer);
479 last_timer = jiffies;
480 return;
481 }
482
483 if (time_after(last_timer, timeout)) {
484 if (!timer_pending(&musb_idle_timer))
485 last_timer = timeout;
486 else {
487 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
488 return;
489 }
490 }
491 last_timer = timeout;
492
493 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
494 otg_state_string(musb->xceiv->state),
495 (unsigned long)jiffies_to_msecs(timeout - jiffies));
496 mod_timer(&musb_idle_timer, timeout);
497 }
498
499 /* ticks of 60 MHz clock */
500 #define DEVCLOCK 60000000
501 #define OTG_TIMER_MS(msecs) ((msecs) \
502 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
503 | TUSB_DEV_OTG_TIMER_ENABLE) \
504 : 0)
505
506 static void tusb_musb_set_vbus(struct musb *musb, int is_on)
507 {
508 void __iomem *tbase = musb->ctrl_base;
509 u32 conf, prcm, timer;
510 u8 devctl;
511
512 /* HDRC controls CPEN, but beware current surges during device
513 * connect. They can trigger transient overcurrent conditions
514 * that must be ignored.
515 */
516
517 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
518 conf = musb_readl(tbase, TUSB_DEV_CONF);
519 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
520
521 if (is_on) {
522 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
523 musb->xceiv->default_a = 1;
524 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
525 devctl |= MUSB_DEVCTL_SESSION;
526
527 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
528 MUSB_HST_MODE(musb);
529 } else {
530 u32 otg_stat;
531
532 timer = 0;
533
534 /* If ID pin is grounded, we want to be a_idle */
535 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
536 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
537 switch (musb->xceiv->state) {
538 case OTG_STATE_A_WAIT_VRISE:
539 case OTG_STATE_A_WAIT_BCON:
540 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
541 break;
542 case OTG_STATE_A_WAIT_VFALL:
543 musb->xceiv->state = OTG_STATE_A_IDLE;
544 break;
545 default:
546 musb->xceiv->state = OTG_STATE_A_IDLE;
547 }
548 musb->is_active = 0;
549 musb->xceiv->default_a = 1;
550 MUSB_HST_MODE(musb);
551 } else {
552 musb->is_active = 0;
553 musb->xceiv->default_a = 0;
554 musb->xceiv->state = OTG_STATE_B_IDLE;
555 MUSB_DEV_MODE(musb);
556 }
557
558 devctl &= ~MUSB_DEVCTL_SESSION;
559 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
560 }
561 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
562
563 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
564 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
565 musb_writel(tbase, TUSB_DEV_CONF, conf);
566 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
567
568 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
569 otg_state_string(musb->xceiv->state),
570 musb_readb(musb->mregs, MUSB_DEVCTL),
571 musb_readl(tbase, TUSB_DEV_OTG_STAT),
572 conf, prcm);
573 }
574
575 /*
576 * Sets the mode to OTG, peripheral or host by changing the ID detection.
577 * Caller must take care of locking.
578 *
579 * Note that if a mini-A cable is plugged in the ID line will stay down as
580 * the weak ID pull-up is not able to pull the ID up.
581 *
582 * REVISIT: It would be possible to add support for changing between host
583 * and peripheral modes in non-OTG configurations by reconfiguring hardware
584 * and then setting musb->board_mode. For now, only support OTG mode.
585 */
586 static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
587 {
588 void __iomem *tbase = musb->ctrl_base;
589 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
590
591 if (musb->board_mode != MUSB_OTG) {
592 ERR("Changing mode currently only supported in OTG mode\n");
593 return -EINVAL;
594 }
595
596 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
597 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
598 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
599 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
600
601 switch (musb_mode) {
602
603 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
604 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
605 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
606 dev_conf |= TUSB_DEV_CONF_ID_SEL;
607 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
608 break;
609 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
610 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
611 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
612 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
613 break;
614 case MUSB_OTG: /* Use PHY ID detection */
615 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
616 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
617 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
618 break;
619
620 default:
621 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
622 return -EINVAL;
623 }
624
625 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
626 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
627 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
628 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
629 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
630
631 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
632 if ((musb_mode == MUSB_PERIPHERAL) &&
633 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
634 INFO("Cannot be peripheral with mini-A cable "
635 "otg_stat: %08x\n", otg_stat);
636
637 return 0;
638 }
639
640 static inline unsigned long
641 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
642 {
643 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
644 unsigned long idle_timeout = 0;
645
646 /* ID pin */
647 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
648 int default_a;
649
650 if (is_otg_enabled(musb))
651 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
652 else
653 default_a = is_host_enabled(musb);
654 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
655 musb->xceiv->default_a = default_a;
656 tusb_musb_set_vbus(musb, default_a);
657
658 /* Don't allow idling immediately */
659 if (default_a)
660 idle_timeout = jiffies + (HZ * 3);
661 }
662
663 /* VBUS state change */
664 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
665
666 /* B-dev state machine: no vbus ~= disconnect */
667 if ((is_otg_enabled(musb) && !musb->xceiv->default_a)
668 || !is_host_enabled(musb)) {
669 /* ? musb_root_disconnect(musb); */
670 musb->port1_status &=
671 ~(USB_PORT_STAT_CONNECTION
672 | USB_PORT_STAT_ENABLE
673 | USB_PORT_STAT_LOW_SPEED
674 | USB_PORT_STAT_HIGH_SPEED
675 | USB_PORT_STAT_TEST
676 );
677
678 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
679 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
680 if (musb->xceiv->state != OTG_STATE_B_IDLE) {
681 /* INTR_DISCONNECT can hide... */
682 musb->xceiv->state = OTG_STATE_B_IDLE;
683 musb->int_usb |= MUSB_INTR_DISCONNECT;
684 }
685 musb->is_active = 0;
686 }
687 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
688 otg_state_string(musb->xceiv->state), otg_stat);
689 idle_timeout = jiffies + (1 * HZ);
690 schedule_work(&musb->irq_work);
691
692 } else /* A-dev state machine */ {
693 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
694 otg_state_string(musb->xceiv->state), otg_stat);
695
696 switch (musb->xceiv->state) {
697 case OTG_STATE_A_IDLE:
698 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
699 musb_platform_set_vbus(musb, 1);
700
701 /* CONNECT can wake if a_wait_bcon is set */
702 if (musb->a_wait_bcon != 0)
703 musb->is_active = 0;
704 else
705 musb->is_active = 1;
706
707 /*
708 * OPT FS A TD.4.6 needs few seconds for
709 * A_WAIT_VRISE
710 */
711 idle_timeout = jiffies + (2 * HZ);
712
713 break;
714 case OTG_STATE_A_WAIT_VRISE:
715 /* ignore; A-session-valid < VBUS_VALID/2,
716 * we monitor this with the timer
717 */
718 break;
719 case OTG_STATE_A_WAIT_VFALL:
720 /* REVISIT this irq triggers during short
721 * spikes caused by enumeration ...
722 */
723 if (musb->vbuserr_retry) {
724 musb->vbuserr_retry--;
725 tusb_musb_set_vbus(musb, 1);
726 } else {
727 musb->vbuserr_retry
728 = VBUSERR_RETRY_COUNT;
729 tusb_musb_set_vbus(musb, 0);
730 }
731 break;
732 default:
733 break;
734 }
735 }
736 }
737
738 /* OTG timer expiration */
739 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
740 u8 devctl;
741
742 dev_dbg(musb->controller, "%s timer, %03x\n",
743 otg_state_string(musb->xceiv->state), otg_stat);
744
745 switch (musb->xceiv->state) {
746 case OTG_STATE_A_WAIT_VRISE:
747 /* VBUS has probably been valid for a while now,
748 * but may well have bounced out of range a bit
749 */
750 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
751 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
752 if ((devctl & MUSB_DEVCTL_VBUS)
753 != MUSB_DEVCTL_VBUS) {
754 dev_dbg(musb->controller, "devctl %02x\n", devctl);
755 break;
756 }
757 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
758 musb->is_active = 0;
759 idle_timeout = jiffies
760 + msecs_to_jiffies(musb->a_wait_bcon);
761 } else {
762 /* REVISIT report overcurrent to hub? */
763 ERR("vbus too slow, devctl %02x\n", devctl);
764 tusb_musb_set_vbus(musb, 0);
765 }
766 break;
767 case OTG_STATE_A_WAIT_BCON:
768 if (musb->a_wait_bcon != 0)
769 idle_timeout = jiffies
770 + msecs_to_jiffies(musb->a_wait_bcon);
771 break;
772 case OTG_STATE_A_SUSPEND:
773 break;
774 case OTG_STATE_B_WAIT_ACON:
775 break;
776 default:
777 break;
778 }
779 }
780 schedule_work(&musb->irq_work);
781
782 return idle_timeout;
783 }
784
785 static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
786 {
787 struct musb *musb = __hci;
788 void __iomem *tbase = musb->ctrl_base;
789 unsigned long flags, idle_timeout = 0;
790 u32 int_mask, int_src;
791
792 spin_lock_irqsave(&musb->lock, flags);
793
794 /* Mask all interrupts to allow using both edge and level GPIO irq */
795 int_mask = musb_readl(tbase, TUSB_INT_MASK);
796 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
797
798 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
799 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
800
801 musb->int_usb = (u8) int_src;
802
803 /* Acknowledge wake-up source interrupts */
804 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
805 u32 reg;
806 u32 i;
807
808 if (tusb_get_revision(musb) == TUSB_REV_30)
809 tusb_wbus_quirk(musb, 0);
810
811 /* there are issues re-locking the PLL on wakeup ... */
812
813 /* work around issue 8 */
814 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
815 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
816 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
817 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
818 if (reg == i)
819 break;
820 dev_dbg(musb->controller, "TUSB NOR not ready\n");
821 }
822
823 /* work around issue 13 (2nd half) */
824 tusb_set_clock_source(musb, 1);
825
826 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
827 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
828 if (reg & ~TUSB_PRCM_WNORCS) {
829 musb->is_active = 1;
830 schedule_work(&musb->irq_work);
831 }
832 dev_dbg(musb->controller, "wake %sactive %02x\n",
833 musb->is_active ? "" : "in", reg);
834
835 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
836 }
837
838 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
839 del_timer(&musb_idle_timer);
840
841 /* OTG state change reports (annoyingly) not issued by Mentor core */
842 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
843 | TUSB_INT_SRC_OTG_TIMEOUT
844 | TUSB_INT_SRC_ID_STATUS_CHNG))
845 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
846
847 /* TX dma callback must be handled here, RX dma callback is
848 * handled in tusb_omap_dma_cb.
849 */
850 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
851 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
852 u32 real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
853
854 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
855 real_dma_src = ~real_dma_src & dma_src;
856 if (tusb_dma_omap() && real_dma_src) {
857 int tx_source = (real_dma_src & 0xffff);
858 int i;
859
860 for (i = 1; i <= 15; i++) {
861 if (tx_source & (1 << i)) {
862 dev_dbg(musb->controller, "completing ep%i %s\n", i, "tx");
863 musb_dma_completion(musb, i, 1);
864 }
865 }
866 }
867 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
868 }
869
870 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
871 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
872 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
873
874 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
875 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
876 musb->int_tx = (musb_src & 0xffff);
877 } else {
878 musb->int_rx = 0;
879 musb->int_tx = 0;
880 }
881
882 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
883 musb_interrupt(musb);
884
885 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
886 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
887 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
888
889 tusb_musb_try_idle(musb, idle_timeout);
890
891 musb_writel(tbase, TUSB_INT_MASK, int_mask);
892 spin_unlock_irqrestore(&musb->lock, flags);
893
894 return IRQ_HANDLED;
895 }
896
897 static int dma_off;
898
899 /*
900 * Enables TUSB6010. Caller must take care of locking.
901 * REVISIT:
902 * - Check what is unnecessary in MGC_HdrcStart()
903 */
904 static void tusb_musb_enable(struct musb *musb)
905 {
906 void __iomem *tbase = musb->ctrl_base;
907
908 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
909 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
910 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
911
912 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
913 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
914 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
915 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
916
917 /* Clear all subsystem interrups */
918 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
919 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
920 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
921
922 /* Acknowledge pending interrupt(s) */
923 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
924
925 /* Only 0 clock cycles for minimum interrupt de-assertion time and
926 * interrupt polarity active low seems to work reliably here */
927 musb_writel(tbase, TUSB_INT_CTRL_CONF,
928 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
929
930 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
931
932 /* maybe force into the Default-A OTG state machine */
933 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
934 & TUSB_DEV_OTG_STAT_ID_STATUS))
935 musb_writel(tbase, TUSB_INT_SRC_SET,
936 TUSB_INT_SRC_ID_STATUS_CHNG);
937
938 if (is_dma_capable() && dma_off)
939 printk(KERN_WARNING "%s %s: dma not reactivated\n",
940 __FILE__, __func__);
941 else
942 dma_off = 1;
943 }
944
945 /*
946 * Disables TUSB6010. Caller must take care of locking.
947 */
948 static void tusb_musb_disable(struct musb *musb)
949 {
950 void __iomem *tbase = musb->ctrl_base;
951
952 /* FIXME stop DMA, IRQs, timers, ... */
953
954 /* disable all IRQs */
955 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
956 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
957 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
958 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
959
960 del_timer(&musb_idle_timer);
961
962 if (is_dma_capable() && !dma_off) {
963 printk(KERN_WARNING "%s %s: dma still active\n",
964 __FILE__, __func__);
965 dma_off = 1;
966 }
967 }
968
969 /*
970 * Sets up TUSB6010 CPU interface specific signals and registers
971 * Note: Settings optimized for OMAP24xx
972 */
973 static void tusb_setup_cpu_interface(struct musb *musb)
974 {
975 void __iomem *tbase = musb->ctrl_base;
976
977 /*
978 * Disable GPIO[5:0] pullups (used as output DMA requests)
979 * Don't disable GPIO[7:6] as they are needed for wake-up.
980 */
981 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
982
983 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
984 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
985
986 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
987 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
988
989 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
990 * de-assertion time 2 system clocks p 62 */
991 musb_writel(tbase, TUSB_DMA_REQ_CONF,
992 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
993 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
994 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
995
996 /* Set 0 wait count for synchronous burst access */
997 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
998 }
999
1000 static int tusb_musb_start(struct musb *musb)
1001 {
1002 void __iomem *tbase = musb->ctrl_base;
1003 int ret = 0;
1004 unsigned long flags;
1005 u32 reg;
1006
1007 if (musb->board_set_power)
1008 ret = musb->board_set_power(1);
1009 if (ret != 0) {
1010 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1011 return ret;
1012 }
1013
1014 spin_lock_irqsave(&musb->lock, flags);
1015
1016 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1017 TUSB_PROD_TEST_RESET_VAL) {
1018 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1019 goto err;
1020 }
1021
1022 ret = tusb_print_revision(musb);
1023 if (ret < 2) {
1024 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1025 ret);
1026 goto err;
1027 }
1028
1029 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1030 * NOR FLASH interface is used */
1031 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1032
1033 /* Select PHY free running 60MHz as a system clock */
1034 tusb_set_clock_source(musb, 1);
1035
1036 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1037 * power saving, enable VBus detect and session end comparators,
1038 * enable IDpullup, enable VBus charging */
1039 musb_writel(tbase, TUSB_PRCM_MNGMT,
1040 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1041 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1042 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1043 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1044 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1045 tusb_setup_cpu_interface(musb);
1046
1047 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1048 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1049 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1050 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1051
1052 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1053 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1054 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1055
1056 spin_unlock_irqrestore(&musb->lock, flags);
1057
1058 return 0;
1059
1060 err:
1061 spin_unlock_irqrestore(&musb->lock, flags);
1062
1063 if (musb->board_set_power)
1064 musb->board_set_power(0);
1065
1066 return -ENODEV;
1067 }
1068
1069 static int tusb_musb_init(struct musb *musb)
1070 {
1071 struct platform_device *pdev;
1072 struct resource *mem;
1073 void __iomem *sync = NULL;
1074 int ret;
1075
1076 usb_nop_xceiv_register();
1077 musb->xceiv = otg_get_transceiver();
1078 if (!musb->xceiv)
1079 return -ENODEV;
1080
1081 pdev = to_platform_device(musb->controller);
1082
1083 /* dma address for async dma */
1084 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1085 musb->async = mem->start;
1086
1087 /* dma address for sync dma */
1088 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1089 if (!mem) {
1090 pr_debug("no sync dma resource?\n");
1091 ret = -ENODEV;
1092 goto done;
1093 }
1094 musb->sync = mem->start;
1095
1096 sync = ioremap(mem->start, resource_size(mem));
1097 if (!sync) {
1098 pr_debug("ioremap for sync failed\n");
1099 ret = -ENOMEM;
1100 goto done;
1101 }
1102 musb->sync_va = sync;
1103
1104 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1105 * FIFOs at 0x600, TUSB at 0x800
1106 */
1107 musb->mregs += TUSB_BASE_OFFSET;
1108
1109 ret = tusb_musb_start(musb);
1110 if (ret) {
1111 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1112 ret);
1113 goto done;
1114 }
1115 musb->isr = tusb_musb_interrupt;
1116
1117 if (is_peripheral_enabled(musb)) {
1118 musb->xceiv->set_power = tusb_draw_power;
1119 the_musb = musb;
1120 }
1121
1122 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1123
1124 done:
1125 if (ret < 0) {
1126 if (sync)
1127 iounmap(sync);
1128
1129 otg_put_transceiver(musb->xceiv);
1130 usb_nop_xceiv_unregister();
1131 }
1132 return ret;
1133 }
1134
1135 static int tusb_musb_exit(struct musb *musb)
1136 {
1137 del_timer_sync(&musb_idle_timer);
1138 the_musb = NULL;
1139
1140 if (musb->board_set_power)
1141 musb->board_set_power(0);
1142
1143 iounmap(musb->sync_va);
1144
1145 otg_put_transceiver(musb->xceiv);
1146 usb_nop_xceiv_unregister();
1147 return 0;
1148 }
1149
1150 static const struct musb_platform_ops tusb_ops = {
1151 .init = tusb_musb_init,
1152 .exit = tusb_musb_exit,
1153
1154 .enable = tusb_musb_enable,
1155 .disable = tusb_musb_disable,
1156
1157 .set_mode = tusb_musb_set_mode,
1158 .try_idle = tusb_musb_try_idle,
1159
1160 .vbus_status = tusb_musb_vbus_status,
1161 .set_vbus = tusb_musb_set_vbus,
1162 };
1163
1164 static u64 tusb_dmamask = DMA_BIT_MASK(32);
1165
1166 static int __init tusb_probe(struct platform_device *pdev)
1167 {
1168 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
1169 struct platform_device *musb;
1170 struct tusb6010_glue *glue;
1171
1172 int ret = -ENOMEM;
1173
1174 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
1175 if (!glue) {
1176 dev_err(&pdev->dev, "failed to allocate glue context\n");
1177 goto err0;
1178 }
1179
1180 musb = platform_device_alloc("musb-hdrc", -1);
1181 if (!musb) {
1182 dev_err(&pdev->dev, "failed to allocate musb device\n");
1183 goto err1;
1184 }
1185
1186 musb->dev.parent = &pdev->dev;
1187 musb->dev.dma_mask = &tusb_dmamask;
1188 musb->dev.coherent_dma_mask = tusb_dmamask;
1189
1190 glue->dev = &pdev->dev;
1191 glue->musb = musb;
1192
1193 pdata->platform_ops = &tusb_ops;
1194
1195 platform_set_drvdata(pdev, glue);
1196
1197 ret = platform_device_add_resources(musb, pdev->resource,
1198 pdev->num_resources);
1199 if (ret) {
1200 dev_err(&pdev->dev, "failed to add resources\n");
1201 goto err2;
1202 }
1203
1204 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
1205 if (ret) {
1206 dev_err(&pdev->dev, "failed to add platform_data\n");
1207 goto err2;
1208 }
1209
1210 ret = platform_device_add(musb);
1211 if (ret) {
1212 dev_err(&pdev->dev, "failed to register musb device\n");
1213 goto err1;
1214 }
1215
1216 return 0;
1217
1218 err2:
1219 platform_device_put(musb);
1220
1221 err1:
1222 kfree(glue);
1223
1224 err0:
1225 return ret;
1226 }
1227
1228 static int __exit tusb_remove(struct platform_device *pdev)
1229 {
1230 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
1231
1232 platform_device_del(glue->musb);
1233 platform_device_put(glue->musb);
1234 kfree(glue);
1235
1236 return 0;
1237 }
1238
1239 static struct platform_driver tusb_driver = {
1240 .remove = __exit_p(tusb_remove),
1241 .driver = {
1242 .name = "musb-tusb",
1243 },
1244 };
1245
1246 MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1247 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1248 MODULE_LICENSE("GPL v2");
1249
1250 static int __init tusb_init(void)
1251 {
1252 return platform_driver_probe(&tusb_driver, tusb_probe);
1253 }
1254 subsys_initcall(tusb_init);
1255
1256 static void __exit tusb_exit(void)
1257 {
1258 platform_driver_unregister(&tusb_driver);
1259 }
1260 module_exit(tusb_exit);
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