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Btrfs: stop the readahead threads on failed mount
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / musb / tusb6010.c
blobec1480191f78752a1ff16b09566f3f4d2d6512b1
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/prefetch.h>
22 #include <linux/usb.h>
23 #include <linux/irq.h>
24 #include <linux/platform_device.h>
25 #include <linux/dma-mapping.h>
26
27 #include "musb_core.h"
28
29 struct tusb6010_glue {
30 struct device *dev;
31 struct platform_device *musb;
32 };
33
34 static void tusb_musb_set_vbus(struct musb *musb, int is_on);
35
36 #define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
37 #define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
38
39 /*
40 * Checks the revision. We need to use the DMA register as 3.0 does not
41 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
42 */
43 u8 tusb_get_revision(struct musb *musb)
44 {
45 void __iomem *tbase = musb->ctrl_base;
46 u32 die_id;
47 u8 rev;
48
49 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
50 if (TUSB_REV_MAJOR(rev) == 3) {
51 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
52 TUSB_DIDR1_HI));
53 if (die_id >= TUSB_DIDR1_HI_REV_31)
54 rev |= 1;
55 }
56
57 return rev;
58 }
59
60 static int tusb_print_revision(struct musb *musb)
61 {
62 void __iomem *tbase = musb->ctrl_base;
63 u8 rev;
64
65 rev = tusb_get_revision(musb);
66
67 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
68 "prcm",
69 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
70 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
71 "int",
72 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
73 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
74 "gpio",
75 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
76 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
77 "dma",
78 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
79 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
80 "dieid",
81 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
82 "rev",
83 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
84
85 return tusb_get_revision(musb);
86 }
87
88 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
89 | TUSB_PHY_OTG_CTRL_TESTM0)
90
91 /*
92 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
93 * Disables power detection in PHY for the duration of idle.
94 */
95 static void tusb_wbus_quirk(struct musb *musb, int enabled)
96 {
97 void __iomem *tbase = musb->ctrl_base;
98 static u32 phy_otg_ctrl, phy_otg_ena;
99 u32 tmp;
100
101 if (enabled) {
102 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
103 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
104 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
105 | phy_otg_ena | WBUS_QUIRK_MASK;
106 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
107 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
108 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
109 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
110 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
111 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
112 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
113 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
114 & TUSB_PHY_OTG_CTRL_TESTM2) {
115 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
116 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
117 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
118 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
119 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
120 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
121 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
122 phy_otg_ctrl = 0;
123 phy_otg_ena = 0;
124 }
125 }
126
127 /*
128 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
129 * so both loading and unloading FIFOs need explicit byte counts.
130 */
131
132 static inline void
133 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
134 {
135 u32 val;
136 int i;
137
138 if (len > 4) {
139 for (i = 0; i < (len >> 2); i++) {
140 memcpy(&val, buf, 4);
141 musb_writel(fifo, 0, val);
142 buf += 4;
143 }
144 len %= 4;
145 }
146 if (len > 0) {
147 /* Write the rest 1 - 3 bytes to FIFO */
148 memcpy(&val, buf, len);
149 musb_writel(fifo, 0, val);
150 }
151 }
152
153 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
154 void __iomem *buf, u16 len)
155 {
156 u32 val;
157 int i;
158
159 if (len > 4) {
160 for (i = 0; i < (len >> 2); i++) {
161 val = musb_readl(fifo, 0);
162 memcpy(buf, &val, 4);
163 buf += 4;
164 }
165 len %= 4;
166 }
167 if (len > 0) {
168 /* Read the rest 1 - 3 bytes from FIFO */
169 val = musb_readl(fifo, 0);
170 memcpy(buf, &val, len);
171 }
172 }
173
174 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
175 {
176 struct musb *musb = hw_ep->musb;
177 void __iomem *ep_conf = hw_ep->conf;
178 void __iomem *fifo = hw_ep->fifo;
179 u8 epnum = hw_ep->epnum;
180
181 prefetch(buf);
182
183 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
184 'T', epnum, fifo, len, buf);
185
186 if (epnum)
187 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
188 TUSB_EP_CONFIG_XFR_SIZE(len));
189 else
190 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
191 TUSB_EP0_CONFIG_XFR_SIZE(len));
192
193 if (likely((0x01 & (unsigned long) buf) == 0)) {
194
195 /* Best case is 32bit-aligned destination address */
196 if ((0x02 & (unsigned long) buf) == 0) {
197 if (len >= 4) {
198 writesl(fifo, buf, len >> 2);
199 buf += (len & ~0x03);
200 len &= 0x03;
201 }
202 } else {
203 if (len >= 2) {
204 u32 val;
205 int i;
206
207 /* Cannot use writesw, fifo is 32-bit */
208 for (i = 0; i < (len >> 2); i++) {
209 val = (u32)(*(u16 *)buf);
210 buf += 2;
211 val |= (*(u16 *)buf) << 16;
212 buf += 2;
213 musb_writel(fifo, 0, val);
214 }
215 len &= 0x03;
216 }
217 }
218 }
219
220 if (len > 0)
221 tusb_fifo_write_unaligned(fifo, buf, len);
222 }
223
224 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
225 {
226 struct musb *musb = hw_ep->musb;
227 void __iomem *ep_conf = hw_ep->conf;
228 void __iomem *fifo = hw_ep->fifo;
229 u8 epnum = hw_ep->epnum;
230
231 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
232 'R', epnum, fifo, len, buf);
233
234 if (epnum)
235 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
236 TUSB_EP_CONFIG_XFR_SIZE(len));
237 else
238 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
239
240 if (likely((0x01 & (unsigned long) buf) == 0)) {
241
242 /* Best case is 32bit-aligned destination address */
243 if ((0x02 & (unsigned long) buf) == 0) {
244 if (len >= 4) {
245 readsl(fifo, buf, len >> 2);
246 buf += (len & ~0x03);
247 len &= 0x03;
248 }
249 } else {
250 if (len >= 2) {
251 u32 val;
252 int i;
253
254 /* Cannot use readsw, fifo is 32-bit */
255 for (i = 0; i < (len >> 2); i++) {
256 val = musb_readl(fifo, 0);
257 *(u16 *)buf = (u16)(val & 0xffff);
258 buf += 2;
259 *(u16 *)buf = (u16)(val >> 16);
260 buf += 2;
261 }
262 len &= 0x03;
263 }
264 }
265 }
266
267 if (len > 0)
268 tusb_fifo_read_unaligned(fifo, buf, len);
269 }
270
271 static struct musb *the_musb;
272
273 /* This is used by gadget drivers, and OTG transceiver logic, allowing
274 * at most mA current to be drawn from VBUS during a Default-B session
275 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
276 * mode), or low power Default-B sessions, something else supplies power.
277 * Caller must take care of locking.
278 */
279 static int tusb_draw_power(struct otg_transceiver *x, unsigned mA)
280 {
281 struct musb *musb = the_musb;
282 void __iomem *tbase = musb->ctrl_base;
283 u32 reg;
284
285 /* tps65030 seems to consume max 100mA, with maybe 60mA available
286 * (measured on one board) for things other than tps and tusb.
287 *
288 * Boards sharing the CPU clock with CLKIN will need to prevent
289 * certain idle sleep states while the USB link is active.
290 *
291 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
292 * The actual current usage would be very board-specific. For now,
293 * it's simpler to just use an aggregate (also board-specific).
294 */
295 if (x->default_a || mA < (musb->min_power << 1))
296 mA = 0;
297
298 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
299 if (mA) {
300 musb->is_bus_powered = 1;
301 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
302 } else {
303 musb->is_bus_powered = 0;
304 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
305 }
306 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
307
308 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
309 return 0;
310 }
311
312 /* workaround for issue 13: change clock during chip idle
313 * (to be fixed in rev3 silicon) ... symptoms include disconnect
314 * or looping suspend/resume cycles
315 */
316 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
317 {
318 void __iomem *tbase = musb->ctrl_base;
319 u32 reg;
320
321 reg = musb_readl(tbase, TUSB_PRCM_CONF);
322 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
323
324 /* 0 = refclk (clkin, XI)
325 * 1 = PHY 60 MHz (internal PLL)
326 * 2 = not supported
327 * 3 = what?
328 */
329 if (mode > 0)
330 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
331
332 musb_writel(tbase, TUSB_PRCM_CONF, reg);
333
334 /* FIXME tusb6010_platform_retime(mode == 0); */
335 }
336
337 /*
338 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
339 * Other code ensures that we idle unless we're connected _and_ the
340 * USB link is not suspended ... and tells us the relevant wakeup
341 * events. SW_EN for voltage is handled separately.
342 */
343 static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
344 {
345 void __iomem *tbase = musb->ctrl_base;
346 u32 reg;
347
348 if ((wakeup_enables & TUSB_PRCM_WBUS)
349 && (tusb_get_revision(musb) == TUSB_REV_30))
350 tusb_wbus_quirk(musb, 1);
351
352 tusb_set_clock_source(musb, 0);
353
354 wakeup_enables |= TUSB_PRCM_WNORCS;
355 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
356
357 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
358 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
359 * Presumably that's mostly to save power, hence WID is immaterial ...
360 */
361
362 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
363 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
364 if (is_host_active(musb)) {
365 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
366 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
367 } else {
368 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
369 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
370 }
371 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
372 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
373
374 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
375 }
376
377 /*
378 * Updates cable VBUS status. Caller must take care of locking.
379 */
380 static int tusb_musb_vbus_status(struct musb *musb)
381 {
382 void __iomem *tbase = musb->ctrl_base;
383 u32 otg_stat, prcm_mngmt;
384 int ret = 0;
385
386 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
387 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
388
389 /* Temporarily enable VBUS detection if it was disabled for
390 * suspend mode. Unless it's enabled otg_stat and devctl will
391 * not show correct VBUS state.
392 */
393 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
394 u32 tmp = prcm_mngmt;
395 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
396 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
397 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
398 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
399 }
400
401 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
402 ret = 1;
403
404 return ret;
405 }
406
407 static struct timer_list musb_idle_timer;
408
409 static void musb_do_idle(unsigned long _musb)
410 {
411 struct musb *musb = (void *)_musb;
412 unsigned long flags;
413
414 spin_lock_irqsave(&musb->lock, flags);
415
416 switch (musb->xceiv->state) {
417 case OTG_STATE_A_WAIT_BCON:
418 if ((musb->a_wait_bcon != 0)
419 && (musb->idle_timeout == 0
420 || time_after(jiffies, musb->idle_timeout))) {
421 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
422 otg_state_string(musb->xceiv->state));
423 }
424 /* FALLTHROUGH */
425 case OTG_STATE_A_IDLE:
426 tusb_musb_set_vbus(musb, 0);
427 default:
428 break;
429 }
430
431 if (!musb->is_active) {
432 u32 wakeups;
433
434 /* wait until khubd handles port change status */
435 if (is_host_active(musb) && (musb->port1_status >> 16))
436 goto done;
437
438 if (is_peripheral_enabled(musb) && !musb->gadget_driver) {
439 wakeups = 0;
440 } else {
441 wakeups = TUSB_PRCM_WHOSTDISCON
442 | TUSB_PRCM_WBUS
443 | TUSB_PRCM_WVBUS;
444 if (is_otg_enabled(musb))
445 wakeups |= TUSB_PRCM_WID;
446 }
447 tusb_allow_idle(musb, wakeups);
448 }
449 done:
450 spin_unlock_irqrestore(&musb->lock, flags);
451 }
452
453 /*
454 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
455 * like "disconnected" or "suspended". We'll be woken out of it by
456 * connect, resume, or disconnect.
457 *
458 * Needs to be called as the last function everywhere where there is
459 * register access to TUSB6010 because of NOR flash wake-up.
460 * Caller should own controller spinlock.
461 *
462 * Delay because peripheral enables D+ pullup 3msec after SE0, and
463 * we don't want to treat that full speed J as a wakeup event.
464 * ... peripherals must draw only suspend current after 10 msec.
465 */
466 static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
467 {
468 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
469 static unsigned long last_timer;
470
471 if (timeout == 0)
472 timeout = default_timeout;
473
474 /* Never idle if active, or when VBUS timeout is not set as host */
475 if (musb->is_active || ((musb->a_wait_bcon == 0)
476 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
477 dev_dbg(musb->controller, "%s active, deleting timer\n",
478 otg_state_string(musb->xceiv->state));
479 del_timer(&musb_idle_timer);
480 last_timer = jiffies;
481 return;
482 }
483
484 if (time_after(last_timer, timeout)) {
485 if (!timer_pending(&musb_idle_timer))
486 last_timer = timeout;
487 else {
488 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
489 return;
490 }
491 }
492 last_timer = timeout;
493
494 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
495 otg_state_string(musb->xceiv->state),
496 (unsigned long)jiffies_to_msecs(timeout - jiffies));
497 mod_timer(&musb_idle_timer, timeout);
498 }
499
500 /* ticks of 60 MHz clock */
501 #define DEVCLOCK 60000000
502 #define OTG_TIMER_MS(msecs) ((msecs) \
503 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
504 | TUSB_DEV_OTG_TIMER_ENABLE) \
505 : 0)
506
507 static void tusb_musb_set_vbus(struct musb *musb, int is_on)
508 {
509 void __iomem *tbase = musb->ctrl_base;
510 u32 conf, prcm, timer;
511 u8 devctl;
512
513 /* HDRC controls CPEN, but beware current surges during device
514 * connect. They can trigger transient overcurrent conditions
515 * that must be ignored.
516 */
517
518 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
519 conf = musb_readl(tbase, TUSB_DEV_CONF);
520 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
521
522 if (is_on) {
523 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
524 musb->xceiv->default_a = 1;
525 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
526 devctl |= MUSB_DEVCTL_SESSION;
527
528 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
529 MUSB_HST_MODE(musb);
530 } else {
531 u32 otg_stat;
532
533 timer = 0;
534
535 /* If ID pin is grounded, we want to be a_idle */
536 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
537 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
538 switch (musb->xceiv->state) {
539 case OTG_STATE_A_WAIT_VRISE:
540 case OTG_STATE_A_WAIT_BCON:
541 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
542 break;
543 case OTG_STATE_A_WAIT_VFALL:
544 musb->xceiv->state = OTG_STATE_A_IDLE;
545 break;
546 default:
547 musb->xceiv->state = OTG_STATE_A_IDLE;
548 }
549 musb->is_active = 0;
550 musb->xceiv->default_a = 1;
551 MUSB_HST_MODE(musb);
552 } else {
553 musb->is_active = 0;
554 musb->xceiv->default_a = 0;
555 musb->xceiv->state = OTG_STATE_B_IDLE;
556 MUSB_DEV_MODE(musb);
557 }
558
559 devctl &= ~MUSB_DEVCTL_SESSION;
560 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
561 }
562 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
563
564 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
565 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
566 musb_writel(tbase, TUSB_DEV_CONF, conf);
567 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
568
569 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
570 otg_state_string(musb->xceiv->state),
571 musb_readb(musb->mregs, MUSB_DEVCTL),
572 musb_readl(tbase, TUSB_DEV_OTG_STAT),
573 conf, prcm);
574 }
575
576 /*
577 * Sets the mode to OTG, peripheral or host by changing the ID detection.
578 * Caller must take care of locking.
579 *
580 * Note that if a mini-A cable is plugged in the ID line will stay down as
581 * the weak ID pull-up is not able to pull the ID up.
582 *
583 * REVISIT: It would be possible to add support for changing between host
584 * and peripheral modes in non-OTG configurations by reconfiguring hardware
585 * and then setting musb->board_mode. For now, only support OTG mode.
586 */
587 static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
588 {
589 void __iomem *tbase = musb->ctrl_base;
590 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
591
592 if (musb->board_mode != MUSB_OTG) {
593 ERR("Changing mode currently only supported in OTG mode\n");
594 return -EINVAL;
595 }
596
597 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
598 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
599 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
600 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
601
602 switch (musb_mode) {
603
604 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
605 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
606 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
607 dev_conf |= TUSB_DEV_CONF_ID_SEL;
608 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
609 break;
610 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
611 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
612 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
613 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
614 break;
615 case MUSB_OTG: /* Use PHY ID detection */
616 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
617 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
618 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
619 break;
620
621 default:
622 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
623 return -EINVAL;
624 }
625
626 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
627 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
628 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
629 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
630 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
631
632 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
633 if ((musb_mode == MUSB_PERIPHERAL) &&
634 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
635 INFO("Cannot be peripheral with mini-A cable "
636 "otg_stat: %08x\n", otg_stat);
637
638 return 0;
639 }
640
641 static inline unsigned long
642 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
643 {
644 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
645 unsigned long idle_timeout = 0;
646
647 /* ID pin */
648 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
649 int default_a;
650
651 if (is_otg_enabled(musb))
652 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
653 else
654 default_a = is_host_enabled(musb);
655 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
656 musb->xceiv->default_a = default_a;
657 tusb_musb_set_vbus(musb, default_a);
658
659 /* Don't allow idling immediately */
660 if (default_a)
661 idle_timeout = jiffies + (HZ * 3);
662 }
663
664 /* VBUS state change */
665 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
666
667 /* B-dev state machine: no vbus ~= disconnect */
668 if ((is_otg_enabled(musb) && !musb->xceiv->default_a)
669 || !is_host_enabled(musb)) {
670 /* ? musb_root_disconnect(musb); */
671 musb->port1_status &=
672 ~(USB_PORT_STAT_CONNECTION
673 | USB_PORT_STAT_ENABLE
674 | USB_PORT_STAT_LOW_SPEED
675 | USB_PORT_STAT_HIGH_SPEED
676 | USB_PORT_STAT_TEST
677 );
678
679 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
680 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
681 if (musb->xceiv->state != OTG_STATE_B_IDLE) {
682 /* INTR_DISCONNECT can hide... */
683 musb->xceiv->state = OTG_STATE_B_IDLE;
684 musb->int_usb |= MUSB_INTR_DISCONNECT;
685 }
686 musb->is_active = 0;
687 }
688 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
689 otg_state_string(musb->xceiv->state), otg_stat);
690 idle_timeout = jiffies + (1 * HZ);
691 schedule_work(&musb->irq_work);
692
693 } else /* A-dev state machine */ {
694 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
695 otg_state_string(musb->xceiv->state), otg_stat);
696
697 switch (musb->xceiv->state) {
698 case OTG_STATE_A_IDLE:
699 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
700 musb_platform_set_vbus(musb, 1);
701
702 /* CONNECT can wake if a_wait_bcon is set */
703 if (musb->a_wait_bcon != 0)
704 musb->is_active = 0;
705 else
706 musb->is_active = 1;
707
708 /*
709 * OPT FS A TD.4.6 needs few seconds for
710 * A_WAIT_VRISE
711 */
712 idle_timeout = jiffies + (2 * HZ);
713
714 break;
715 case OTG_STATE_A_WAIT_VRISE:
716 /* ignore; A-session-valid < VBUS_VALID/2,
717 * we monitor this with the timer
718 */
719 break;
720 case OTG_STATE_A_WAIT_VFALL:
721 /* REVISIT this irq triggers during short
722 * spikes caused by enumeration ...
723 */
724 if (musb->vbuserr_retry) {
725 musb->vbuserr_retry--;
726 tusb_musb_set_vbus(musb, 1);
727 } else {
728 musb->vbuserr_retry
729 = VBUSERR_RETRY_COUNT;
730 tusb_musb_set_vbus(musb, 0);
731 }
732 break;
733 default:
734 break;
735 }
736 }
737 }
738
739 /* OTG timer expiration */
740 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
741 u8 devctl;
742
743 dev_dbg(musb->controller, "%s timer, %03x\n",
744 otg_state_string(musb->xceiv->state), otg_stat);
745
746 switch (musb->xceiv->state) {
747 case OTG_STATE_A_WAIT_VRISE:
748 /* VBUS has probably been valid for a while now,
749 * but may well have bounced out of range a bit
750 */
751 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
752 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
753 if ((devctl & MUSB_DEVCTL_VBUS)
754 != MUSB_DEVCTL_VBUS) {
755 dev_dbg(musb->controller, "devctl %02x\n", devctl);
756 break;
757 }
758 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
759 musb->is_active = 0;
760 idle_timeout = jiffies
761 + msecs_to_jiffies(musb->a_wait_bcon);
762 } else {
763 /* REVISIT report overcurrent to hub? */
764 ERR("vbus too slow, devctl %02x\n", devctl);
765 tusb_musb_set_vbus(musb, 0);
766 }
767 break;
768 case OTG_STATE_A_WAIT_BCON:
769 if (musb->a_wait_bcon != 0)
770 idle_timeout = jiffies
771 + msecs_to_jiffies(musb->a_wait_bcon);
772 break;
773 case OTG_STATE_A_SUSPEND:
774 break;
775 case OTG_STATE_B_WAIT_ACON:
776 break;
777 default:
778 break;
779 }
780 }
781 schedule_work(&musb->irq_work);
782
783 return idle_timeout;
784 }
785
786 static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
787 {
788 struct musb *musb = __hci;
789 void __iomem *tbase = musb->ctrl_base;
790 unsigned long flags, idle_timeout = 0;
791 u32 int_mask, int_src;
792
793 spin_lock_irqsave(&musb->lock, flags);
794
795 /* Mask all interrupts to allow using both edge and level GPIO irq */
796 int_mask = musb_readl(tbase, TUSB_INT_MASK);
797 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
798
799 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
800 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
801
802 musb->int_usb = (u8) int_src;
803
804 /* Acknowledge wake-up source interrupts */
805 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
806 u32 reg;
807 u32 i;
808
809 if (tusb_get_revision(musb) == TUSB_REV_30)
810 tusb_wbus_quirk(musb, 0);
811
812 /* there are issues re-locking the PLL on wakeup ... */
813
814 /* work around issue 8 */
815 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
816 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
817 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
818 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
819 if (reg == i)
820 break;
821 dev_dbg(musb->controller, "TUSB NOR not ready\n");
822 }
823
824 /* work around issue 13 (2nd half) */
825 tusb_set_clock_source(musb, 1);
826
827 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
828 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
829 if (reg & ~TUSB_PRCM_WNORCS) {
830 musb->is_active = 1;
831 schedule_work(&musb->irq_work);
832 }
833 dev_dbg(musb->controller, "wake %sactive %02x\n",
834 musb->is_active ? "" : "in", reg);
835
836 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
837 }
838
839 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
840 del_timer(&musb_idle_timer);
841
842 /* OTG state change reports (annoyingly) not issued by Mentor core */
843 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
844 | TUSB_INT_SRC_OTG_TIMEOUT
845 | TUSB_INT_SRC_ID_STATUS_CHNG))
846 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
847
848 /* TX dma callback must be handled here, RX dma callback is
849 * handled in tusb_omap_dma_cb.
850 */
851 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
852 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
853 u32 real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
854
855 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
856 real_dma_src = ~real_dma_src & dma_src;
857 if (tusb_dma_omap() && real_dma_src) {
858 int tx_source = (real_dma_src & 0xffff);
859 int i;
860
861 for (i = 1; i <= 15; i++) {
862 if (tx_source & (1 << i)) {
863 dev_dbg(musb->controller, "completing ep%i %s\n", i, "tx");
864 musb_dma_completion(musb, i, 1);
865 }
866 }
867 }
868 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
869 }
870
871 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
872 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
873 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
874
875 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
876 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
877 musb->int_tx = (musb_src & 0xffff);
878 } else {
879 musb->int_rx = 0;
880 musb->int_tx = 0;
881 }
882
883 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
884 musb_interrupt(musb);
885
886 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
887 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
888 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
889
890 tusb_musb_try_idle(musb, idle_timeout);
891
892 musb_writel(tbase, TUSB_INT_MASK, int_mask);
893 spin_unlock_irqrestore(&musb->lock, flags);
894
895 return IRQ_HANDLED;
896 }
897
898 static int dma_off;
899
900 /*
901 * Enables TUSB6010. Caller must take care of locking.
902 * REVISIT:
903 * - Check what is unnecessary in MGC_HdrcStart()
904 */
905 static void tusb_musb_enable(struct musb *musb)
906 {
907 void __iomem *tbase = musb->ctrl_base;
908
909 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
910 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
911 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
912
913 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
914 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
915 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
916 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
917
918 /* Clear all subsystem interrups */
919 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
920 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
921 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
922
923 /* Acknowledge pending interrupt(s) */
924 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
925
926 /* Only 0 clock cycles for minimum interrupt de-assertion time and
927 * interrupt polarity active low seems to work reliably here */
928 musb_writel(tbase, TUSB_INT_CTRL_CONF,
929 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
930
931 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
932
933 /* maybe force into the Default-A OTG state machine */
934 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
935 & TUSB_DEV_OTG_STAT_ID_STATUS))
936 musb_writel(tbase, TUSB_INT_SRC_SET,
937 TUSB_INT_SRC_ID_STATUS_CHNG);
938
939 if (is_dma_capable() && dma_off)
940 printk(KERN_WARNING "%s %s: dma not reactivated\n",
941 __FILE__, __func__);
942 else
943 dma_off = 1;
944 }
945
946 /*
947 * Disables TUSB6010. Caller must take care of locking.
948 */
949 static void tusb_musb_disable(struct musb *musb)
950 {
951 void __iomem *tbase = musb->ctrl_base;
952
953 /* FIXME stop DMA, IRQs, timers, ... */
954
955 /* disable all IRQs */
956 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
957 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
958 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
959 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
960
961 del_timer(&musb_idle_timer);
962
963 if (is_dma_capable() && !dma_off) {
964 printk(KERN_WARNING "%s %s: dma still active\n",
965 __FILE__, __func__);
966 dma_off = 1;
967 }
968 }
969
970 /*
971 * Sets up TUSB6010 CPU interface specific signals and registers
972 * Note: Settings optimized for OMAP24xx
973 */
974 static void tusb_setup_cpu_interface(struct musb *musb)
975 {
976 void __iomem *tbase = musb->ctrl_base;
977
978 /*
979 * Disable GPIO[5:0] pullups (used as output DMA requests)
980 * Don't disable GPIO[7:6] as they are needed for wake-up.
981 */
982 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
983
984 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
985 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
986
987 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
988 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
989
990 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
991 * de-assertion time 2 system clocks p 62 */
992 musb_writel(tbase, TUSB_DMA_REQ_CONF,
993 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
994 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
995 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
996
997 /* Set 0 wait count for synchronous burst access */
998 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
999 }
1000
1001 static int tusb_musb_start(struct musb *musb)
1002 {
1003 void __iomem *tbase = musb->ctrl_base;
1004 int ret = 0;
1005 unsigned long flags;
1006 u32 reg;
1007
1008 if (musb->board_set_power)
1009 ret = musb->board_set_power(1);
1010 if (ret != 0) {
1011 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1012 return ret;
1013 }
1014
1015 spin_lock_irqsave(&musb->lock, flags);
1016
1017 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1018 TUSB_PROD_TEST_RESET_VAL) {
1019 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1020 goto err;
1021 }
1022
1023 ret = tusb_print_revision(musb);
1024 if (ret < 2) {
1025 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1026 ret);
1027 goto err;
1028 }
1029
1030 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1031 * NOR FLASH interface is used */
1032 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1033
1034 /* Select PHY free running 60MHz as a system clock */
1035 tusb_set_clock_source(musb, 1);
1036
1037 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1038 * power saving, enable VBus detect and session end comparators,
1039 * enable IDpullup, enable VBus charging */
1040 musb_writel(tbase, TUSB_PRCM_MNGMT,
1041 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1042 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1043 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1044 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1045 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1046 tusb_setup_cpu_interface(musb);
1047
1048 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1049 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1050 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1051 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1052
1053 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1054 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1055 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1056
1057 spin_unlock_irqrestore(&musb->lock, flags);
1058
1059 return 0;
1060
1061 err:
1062 spin_unlock_irqrestore(&musb->lock, flags);
1063
1064 if (musb->board_set_power)
1065 musb->board_set_power(0);
1066
1067 return -ENODEV;
1068 }
1069
1070 static int tusb_musb_init(struct musb *musb)
1071 {
1072 struct platform_device *pdev;
1073 struct resource *mem;
1074 void __iomem *sync = NULL;
1075 int ret;
1076
1077 usb_nop_xceiv_register();
1078 musb->xceiv = otg_get_transceiver();
1079 if (!musb->xceiv)
1080 return -ENODEV;
1081
1082 pdev = to_platform_device(musb->controller);
1083
1084 /* dma address for async dma */
1085 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1086 musb->async = mem->start;
1087
1088 /* dma address for sync dma */
1089 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1090 if (!mem) {
1091 pr_debug("no sync dma resource?\n");
1092 ret = -ENODEV;
1093 goto done;
1094 }
1095 musb->sync = mem->start;
1096
1097 sync = ioremap(mem->start, resource_size(mem));
1098 if (!sync) {
1099 pr_debug("ioremap for sync failed\n");
1100 ret = -ENOMEM;
1101 goto done;
1102 }
1103 musb->sync_va = sync;
1104
1105 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1106 * FIFOs at 0x600, TUSB at 0x800
1107 */
1108 musb->mregs += TUSB_BASE_OFFSET;
1109
1110 ret = tusb_musb_start(musb);
1111 if (ret) {
1112 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1113 ret);
1114 goto done;
1115 }
1116 musb->isr = tusb_musb_interrupt;
1117
1118 if (is_peripheral_enabled(musb)) {
1119 musb->xceiv->set_power = tusb_draw_power;
1120 the_musb = musb;
1121 }
1122
1123 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1124
1125 done:
1126 if (ret < 0) {
1127 if (sync)
1128 iounmap(sync);
1129
1130 otg_put_transceiver(musb->xceiv);
1131 usb_nop_xceiv_unregister();
1132 }
1133 return ret;
1134 }
1135
1136 static int tusb_musb_exit(struct musb *musb)
1137 {
1138 del_timer_sync(&musb_idle_timer);
1139 the_musb = NULL;
1140
1141 if (musb->board_set_power)
1142 musb->board_set_power(0);
1143
1144 iounmap(musb->sync_va);
1145
1146 otg_put_transceiver(musb->xceiv);
1147 usb_nop_xceiv_unregister();
1148 return 0;
1149 }
1150
1151 static const struct musb_platform_ops tusb_ops = {
1152 .init = tusb_musb_init,
1153 .exit = tusb_musb_exit,
1154
1155 .enable = tusb_musb_enable,
1156 .disable = tusb_musb_disable,
1157
1158 .set_mode = tusb_musb_set_mode,
1159 .try_idle = tusb_musb_try_idle,
1160
1161 .vbus_status = tusb_musb_vbus_status,
1162 .set_vbus = tusb_musb_set_vbus,
1163 };
1164
1165 static u64 tusb_dmamask = DMA_BIT_MASK(32);
1166
1167 static int __init tusb_probe(struct platform_device *pdev)
1168 {
1169 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
1170 struct platform_device *musb;
1171 struct tusb6010_glue *glue;
1172
1173 int ret = -ENOMEM;
1174
1175 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
1176 if (!glue) {
1177 dev_err(&pdev->dev, "failed to allocate glue context\n");
1178 goto err0;
1179 }
1180
1181 musb = platform_device_alloc("musb-hdrc", -1);
1182 if (!musb) {
1183 dev_err(&pdev->dev, "failed to allocate musb device\n");
1184 goto err1;
1185 }
1186
1187 musb->dev.parent = &pdev->dev;
1188 musb->dev.dma_mask = &tusb_dmamask;
1189 musb->dev.coherent_dma_mask = tusb_dmamask;
1190
1191 glue->dev = &pdev->dev;
1192 glue->musb = musb;
1193
1194 pdata->platform_ops = &tusb_ops;
1195
1196 platform_set_drvdata(pdev, glue);
1197
1198 ret = platform_device_add_resources(musb, pdev->resource,
1199 pdev->num_resources);
1200 if (ret) {
1201 dev_err(&pdev->dev, "failed to add resources\n");
1202 goto err2;
1203 }
1204
1205 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
1206 if (ret) {
1207 dev_err(&pdev->dev, "failed to add platform_data\n");
1208 goto err2;
1209 }
1210
1211 ret = platform_device_add(musb);
1212 if (ret) {
1213 dev_err(&pdev->dev, "failed to register musb device\n");
1214 goto err1;
1215 }
1216
1217 return 0;
1218
1219 err2:
1220 platform_device_put(musb);
1221
1222 err1:
1223 kfree(glue);
1224
1225 err0:
1226 return ret;
1227 }
1228
1229 static int __exit tusb_remove(struct platform_device *pdev)
1230 {
1231 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
1232
1233 platform_device_del(glue->musb);
1234 platform_device_put(glue->musb);
1235 kfree(glue);
1236
1237 return 0;
1238 }
1239
1240 static struct platform_driver tusb_driver = {
1241 .remove = __exit_p(tusb_remove),
1242 .driver = {
1243 .name = "musb-tusb",
1244 },
1245 };
1246
1247 MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1248 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1249 MODULE_LICENSE("GPL v2");
1250
1251 static int __init tusb_init(void)
1252 {
1253 return platform_driver_probe(&tusb_driver, tusb_probe);
1254 }
1255 subsys_initcall(tusb_init);
1256
1257 static void __exit tusb_exit(void)
1258 {
1259 platform_driver_unregister(&tusb_driver);
1260 }
1261 module_exit(tusb_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree