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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / usb / musb / tusb6010.c
blob4e9fb1d08698abd7ecb6a38a7f6ce0a5c68fab05
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/err.h>
21 #include <linux/prefetch.h>
22 #include <linux/usb.h>
23 #include <linux/irq.h>
24 #include <linux/io.h>
25 #include <linux/platform_device.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/usb/usb_phy_gen_xceiv.h>
28
29 #include "musb_core.h"
30
31 struct tusb6010_glue {
32 struct device *dev;
33 struct platform_device *musb;
34 };
35
36 static void tusb_musb_set_vbus(struct musb *musb, int is_on);
37
38 #define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
39 #define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
40
41 /*
42 * Checks the revision. We need to use the DMA register as 3.0 does not
43 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
44 */
45 u8 tusb_get_revision(struct musb *musb)
46 {
47 void __iomem *tbase = musb->ctrl_base;
48 u32 die_id;
49 u8 rev;
50
51 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
52 if (TUSB_REV_MAJOR(rev) == 3) {
53 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
54 TUSB_DIDR1_HI));
55 if (die_id >= TUSB_DIDR1_HI_REV_31)
56 rev |= 1;
57 }
58
59 return rev;
60 }
61 EXPORT_SYMBOL_GPL(tusb_get_revision);
62
63 static int tusb_print_revision(struct musb *musb)
64 {
65 void __iomem *tbase = musb->ctrl_base;
66 u8 rev;
67
68 rev = tusb_get_revision(musb);
69
70 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
71 "prcm",
72 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
73 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
74 "int",
75 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
76 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
77 "gpio",
78 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
79 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
80 "dma",
81 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
82 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
83 "dieid",
84 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
85 "rev",
86 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
87
88 return tusb_get_revision(musb);
89 }
90
91 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
92 | TUSB_PHY_OTG_CTRL_TESTM0)
93
94 /*
95 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
96 * Disables power detection in PHY for the duration of idle.
97 */
98 static void tusb_wbus_quirk(struct musb *musb, int enabled)
99 {
100 void __iomem *tbase = musb->ctrl_base;
101 static u32 phy_otg_ctrl, phy_otg_ena;
102 u32 tmp;
103
104 if (enabled) {
105 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
106 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
107 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
108 | phy_otg_ena | WBUS_QUIRK_MASK;
109 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
110 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
111 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
112 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
113 dev_dbg(musb->controller, "Enabled 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));
116 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
117 & TUSB_PHY_OTG_CTRL_TESTM2) {
118 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
119 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
120 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
121 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
122 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
123 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
124 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
125 phy_otg_ctrl = 0;
126 phy_otg_ena = 0;
127 }
128 }
129
130 /*
131 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
132 * so both loading and unloading FIFOs need explicit byte counts.
133 */
134
135 static inline void
136 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
137 {
138 u32 val;
139 int i;
140
141 if (len > 4) {
142 for (i = 0; i < (len >> 2); i++) {
143 memcpy(&val, buf, 4);
144 musb_writel(fifo, 0, val);
145 buf += 4;
146 }
147 len %= 4;
148 }
149 if (len > 0) {
150 /* Write the rest 1 - 3 bytes to FIFO */
151 memcpy(&val, buf, len);
152 musb_writel(fifo, 0, val);
153 }
154 }
155
156 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
157 void *buf, u16 len)
158 {
159 u32 val;
160 int i;
161
162 if (len > 4) {
163 for (i = 0; i < (len >> 2); i++) {
164 val = musb_readl(fifo, 0);
165 memcpy(buf, &val, 4);
166 buf += 4;
167 }
168 len %= 4;
169 }
170 if (len > 0) {
171 /* Read the rest 1 - 3 bytes from FIFO */
172 val = musb_readl(fifo, 0);
173 memcpy(buf, &val, len);
174 }
175 }
176
177 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
178 {
179 struct musb *musb = hw_ep->musb;
180 void __iomem *ep_conf = hw_ep->conf;
181 void __iomem *fifo = hw_ep->fifo;
182 u8 epnum = hw_ep->epnum;
183
184 prefetch(buf);
185
186 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
187 'T', epnum, fifo, len, buf);
188
189 if (epnum)
190 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
191 TUSB_EP_CONFIG_XFR_SIZE(len));
192 else
193 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
194 TUSB_EP0_CONFIG_XFR_SIZE(len));
195
196 if (likely((0x01 & (unsigned long) buf) == 0)) {
197
198 /* Best case is 32bit-aligned destination address */
199 if ((0x02 & (unsigned long) buf) == 0) {
200 if (len >= 4) {
201 iowrite32_rep(fifo, buf, len >> 2);
202 buf += (len & ~0x03);
203 len &= 0x03;
204 }
205 } else {
206 if (len >= 2) {
207 u32 val;
208 int i;
209
210 /* Cannot use writesw, fifo is 32-bit */
211 for (i = 0; i < (len >> 2); i++) {
212 val = (u32)(*(u16 *)buf);
213 buf += 2;
214 val |= (*(u16 *)buf) << 16;
215 buf += 2;
216 musb_writel(fifo, 0, val);
217 }
218 len &= 0x03;
219 }
220 }
221 }
222
223 if (len > 0)
224 tusb_fifo_write_unaligned(fifo, buf, len);
225 }
226
227 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
228 {
229 struct musb *musb = hw_ep->musb;
230 void __iomem *ep_conf = hw_ep->conf;
231 void __iomem *fifo = hw_ep->fifo;
232 u8 epnum = hw_ep->epnum;
233
234 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
235 'R', epnum, fifo, len, buf);
236
237 if (epnum)
238 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
239 TUSB_EP_CONFIG_XFR_SIZE(len));
240 else
241 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
242
243 if (likely((0x01 & (unsigned long) buf) == 0)) {
244
245 /* Best case is 32bit-aligned destination address */
246 if ((0x02 & (unsigned long) buf) == 0) {
247 if (len >= 4) {
248 ioread32_rep(fifo, buf, len >> 2);
249 buf += (len & ~0x03);
250 len &= 0x03;
251 }
252 } else {
253 if (len >= 2) {
254 u32 val;
255 int i;
256
257 /* Cannot use readsw, fifo is 32-bit */
258 for (i = 0; i < (len >> 2); i++) {
259 val = musb_readl(fifo, 0);
260 *(u16 *)buf = (u16)(val & 0xffff);
261 buf += 2;
262 *(u16 *)buf = (u16)(val >> 16);
263 buf += 2;
264 }
265 len &= 0x03;
266 }
267 }
268 }
269
270 if (len > 0)
271 tusb_fifo_read_unaligned(fifo, buf, len);
272 }
273
274 static struct musb *the_musb;
275
276 /* This is used by gadget drivers, and OTG transceiver logic, allowing
277 * at most mA current to be drawn from VBUS during a Default-B session
278 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
279 * mode), or low power Default-B sessions, something else supplies power.
280 * Caller must take care of locking.
281 */
282 static int tusb_draw_power(struct usb_phy *x, unsigned mA)
283 {
284 struct musb *musb = the_musb;
285 void __iomem *tbase = musb->ctrl_base;
286 u32 reg;
287
288 /* tps65030 seems to consume max 100mA, with maybe 60mA available
289 * (measured on one board) for things other than tps and tusb.
290 *
291 * Boards sharing the CPU clock with CLKIN will need to prevent
292 * certain idle sleep states while the USB link is active.
293 *
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).
297 */
298 if (x->otg->default_a || mA < (musb->min_power << 1))
299 mA = 0;
300
301 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
302 if (mA) {
303 musb->is_bus_powered = 1;
304 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
305 } else {
306 musb->is_bus_powered = 0;
307 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
308 }
309 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
310
311 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
312 return 0;
313 }
314
315 /* workaround for issue 13: change clock during chip idle
316 * (to be fixed in rev3 silicon) ... symptoms include disconnect
317 * or looping suspend/resume cycles
318 */
319 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
320 {
321 void __iomem *tbase = musb->ctrl_base;
322 u32 reg;
323
324 reg = musb_readl(tbase, TUSB_PRCM_CONF);
325 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
326
327 /* 0 = refclk (clkin, XI)
328 * 1 = PHY 60 MHz (internal PLL)
329 * 2 = not supported
330 * 3 = what?
331 */
332 if (mode > 0)
333 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
334
335 musb_writel(tbase, TUSB_PRCM_CONF, reg);
336
337 /* FIXME tusb6010_platform_retime(mode == 0); */
338 }
339
340 /*
341 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
342 * Other code ensures that we idle unless we're connected _and_ the
343 * USB link is not suspended ... and tells us the relevant wakeup
344 * events. SW_EN for voltage is handled separately.
345 */
346 static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
347 {
348 void __iomem *tbase = musb->ctrl_base;
349 u32 reg;
350
351 if ((wakeup_enables & TUSB_PRCM_WBUS)
352 && (tusb_get_revision(musb) == TUSB_REV_30))
353 tusb_wbus_quirk(musb, 1);
354
355 tusb_set_clock_source(musb, 0);
356
357 wakeup_enables |= TUSB_PRCM_WNORCS;
358 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
359
360 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
361 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
362 * Presumably that's mostly to save power, hence WID is immaterial ...
363 */
364
365 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
366 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
367 if (is_host_active(musb)) {
368 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
369 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
370 } else {
371 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
372 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
373 }
374 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
375 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
376
377 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
378 }
379
380 /*
381 * Updates cable VBUS status. Caller must take care of locking.
382 */
383 static int tusb_musb_vbus_status(struct musb *musb)
384 {
385 void __iomem *tbase = musb->ctrl_base;
386 u32 otg_stat, prcm_mngmt;
387 int ret = 0;
388
389 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
390 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
391
392 /* Temporarily enable VBUS detection if it was disabled for
393 * suspend mode. Unless it's enabled otg_stat and devctl will
394 * not show correct VBUS state.
395 */
396 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
397 u32 tmp = prcm_mngmt;
398 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
399 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
400 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
401 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
402 }
403
404 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
405 ret = 1;
406
407 return ret;
408 }
409
410 static struct timer_list musb_idle_timer;
411
412 static void musb_do_idle(unsigned long _musb)
413 {
414 struct musb *musb = (void *)_musb;
415 unsigned long flags;
416
417 spin_lock_irqsave(&musb->lock, flags);
418
419 switch (musb->xceiv->state) {
420 case OTG_STATE_A_WAIT_BCON:
421 if ((musb->a_wait_bcon != 0)
422 && (musb->idle_timeout == 0
423 || time_after(jiffies, musb->idle_timeout))) {
424 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
425 usb_otg_state_string(musb->xceiv->state));
426 }
427 /* FALLTHROUGH */
428 case OTG_STATE_A_IDLE:
429 tusb_musb_set_vbus(musb, 0);
430 default:
431 break;
432 }
433
434 if (!musb->is_active) {
435 u32 wakeups;
436
437 /* wait until khubd handles port change status */
438 if (is_host_active(musb) && (musb->port1_status >> 16))
439 goto done;
440
441 if (!musb->gadget_driver) {
442 wakeups = 0;
443 } else {
444 wakeups = TUSB_PRCM_WHOSTDISCON
445 | TUSB_PRCM_WBUS
446 | TUSB_PRCM_WVBUS;
447 wakeups |= TUSB_PRCM_WID;
448 }
449 tusb_allow_idle(musb, wakeups);
450 }
451 done:
452 spin_unlock_irqrestore(&musb->lock, flags);
453 }
454
455 /*
456 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
457 * like "disconnected" or "suspended". We'll be woken out of it by
458 * connect, resume, or disconnect.
459 *
460 * Needs to be called as the last function everywhere where there is
461 * register access to TUSB6010 because of NOR flash wake-up.
462 * Caller should own controller spinlock.
463 *
464 * Delay because peripheral enables D+ pullup 3msec after SE0, and
465 * we don't want to treat that full speed J as a wakeup event.
466 * ... peripherals must draw only suspend current after 10 msec.
467 */
468 static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
469 {
470 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
471 static unsigned long last_timer;
472
473 if (timeout == 0)
474 timeout = default_timeout;
475
476 /* Never idle if active, or when VBUS timeout is not set as host */
477 if (musb->is_active || ((musb->a_wait_bcon == 0)
478 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
479 dev_dbg(musb->controller, "%s active, deleting timer\n",
480 usb_otg_state_string(musb->xceiv->state));
481 del_timer(&musb_idle_timer);
482 last_timer = jiffies;
483 return;
484 }
485
486 if (time_after(last_timer, timeout)) {
487 if (!timer_pending(&musb_idle_timer))
488 last_timer = timeout;
489 else {
490 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
491 return;
492 }
493 }
494 last_timer = timeout;
495
496 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
497 usb_otg_state_string(musb->xceiv->state),
498 (unsigned long)jiffies_to_msecs(timeout - jiffies));
499 mod_timer(&musb_idle_timer, timeout);
500 }
501
502 /* ticks of 60 MHz clock */
503 #define DEVCLOCK 60000000
504 #define OTG_TIMER_MS(msecs) ((msecs) \
505 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
506 | TUSB_DEV_OTG_TIMER_ENABLE) \
507 : 0)
508
509 static void tusb_musb_set_vbus(struct musb *musb, int is_on)
510 {
511 void __iomem *tbase = musb->ctrl_base;
512 u32 conf, prcm, timer;
513 u8 devctl;
514 struct usb_otg *otg = musb->xceiv->otg;
515
516 /* HDRC controls CPEN, but beware current surges during device
517 * connect. They can trigger transient overcurrent conditions
518 * that must be ignored.
519 */
520
521 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
522 conf = musb_readl(tbase, TUSB_DEV_CONF);
523 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
524
525 if (is_on) {
526 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
527 otg->default_a = 1;
528 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
529 devctl |= MUSB_DEVCTL_SESSION;
530
531 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
532 MUSB_HST_MODE(musb);
533 } else {
534 u32 otg_stat;
535
536 timer = 0;
537
538 /* If ID pin is grounded, we want to be a_idle */
539 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
540 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
541 switch (musb->xceiv->state) {
542 case OTG_STATE_A_WAIT_VRISE:
543 case OTG_STATE_A_WAIT_BCON:
544 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
545 break;
546 case OTG_STATE_A_WAIT_VFALL:
547 musb->xceiv->state = OTG_STATE_A_IDLE;
548 break;
549 default:
550 musb->xceiv->state = OTG_STATE_A_IDLE;
551 }
552 musb->is_active = 0;
553 otg->default_a = 1;
554 MUSB_HST_MODE(musb);
555 } else {
556 musb->is_active = 0;
557 otg->default_a = 0;
558 musb->xceiv->state = OTG_STATE_B_IDLE;
559 MUSB_DEV_MODE(musb);
560 }
561
562 devctl &= ~MUSB_DEVCTL_SESSION;
563 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
564 }
565 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
566
567 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
568 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
569 musb_writel(tbase, TUSB_DEV_CONF, conf);
570 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
571
572 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
573 usb_otg_state_string(musb->xceiv->state),
574 musb_readb(musb->mregs, MUSB_DEVCTL),
575 musb_readl(tbase, TUSB_DEV_OTG_STAT),
576 conf, prcm);
577 }
578
579 /*
580 * Sets the mode to OTG, peripheral or host by changing the ID detection.
581 * Caller must take care of locking.
582 *
583 * Note that if a mini-A cable is plugged in the ID line will stay down as
584 * the weak ID pull-up is not able to pull the ID up.
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 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
592 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
593 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
594 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
595
596 switch (musb_mode) {
597
598 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
599 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
600 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
601 dev_conf |= TUSB_DEV_CONF_ID_SEL;
602 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
603 break;
604 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
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 | TUSB_DEV_CONF_SOFT_ID);
608 break;
609 case MUSB_OTG: /* Use PHY ID detection */
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
615 default:
616 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
617 return -EINVAL;
618 }
619
620 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
621 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
622 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
623 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
624 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
625
626 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
627 if ((musb_mode == MUSB_PERIPHERAL) &&
628 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
629 INFO("Cannot be peripheral with mini-A cable "
630 "otg_stat: %08x\n", otg_stat);
631
632 return 0;
633 }
634
635 static inline unsigned long
636 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
637 {
638 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
639 unsigned long idle_timeout = 0;
640 struct usb_otg *otg = musb->xceiv->otg;
641
642 /* ID pin */
643 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
644 int default_a;
645
646 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
647 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
648 otg->default_a = default_a;
649 tusb_musb_set_vbus(musb, default_a);
650
651 /* Don't allow idling immediately */
652 if (default_a)
653 idle_timeout = jiffies + (HZ * 3);
654 }
655
656 /* VBUS state change */
657 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
658
659 /* B-dev state machine: no vbus ~= disconnect */
660 if (!otg->default_a) {
661 /* ? musb_root_disconnect(musb); */
662 musb->port1_status &=
663 ~(USB_PORT_STAT_CONNECTION
664 | USB_PORT_STAT_ENABLE
665 | USB_PORT_STAT_LOW_SPEED
666 | USB_PORT_STAT_HIGH_SPEED
667 | USB_PORT_STAT_TEST
668 );
669
670 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
671 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
672 if (musb->xceiv->state != OTG_STATE_B_IDLE) {
673 /* INTR_DISCONNECT can hide... */
674 musb->xceiv->state = OTG_STATE_B_IDLE;
675 musb->int_usb |= MUSB_INTR_DISCONNECT;
676 }
677 musb->is_active = 0;
678 }
679 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
680 usb_otg_state_string(musb->xceiv->state), otg_stat);
681 idle_timeout = jiffies + (1 * HZ);
682 schedule_work(&musb->irq_work);
683
684 } else /* A-dev state machine */ {
685 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
686 usb_otg_state_string(musb->xceiv->state), otg_stat);
687
688 switch (musb->xceiv->state) {
689 case OTG_STATE_A_IDLE:
690 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
691 musb_platform_set_vbus(musb, 1);
692
693 /* CONNECT can wake if a_wait_bcon is set */
694 if (musb->a_wait_bcon != 0)
695 musb->is_active = 0;
696 else
697 musb->is_active = 1;
698
699 /*
700 * OPT FS A TD.4.6 needs few seconds for
701 * A_WAIT_VRISE
702 */
703 idle_timeout = jiffies + (2 * HZ);
704
705 break;
706 case OTG_STATE_A_WAIT_VRISE:
707 /* ignore; A-session-valid < VBUS_VALID/2,
708 * we monitor this with the timer
709 */
710 break;
711 case OTG_STATE_A_WAIT_VFALL:
712 /* REVISIT this irq triggers during short
713 * spikes caused by enumeration ...
714 */
715 if (musb->vbuserr_retry) {
716 musb->vbuserr_retry--;
717 tusb_musb_set_vbus(musb, 1);
718 } else {
719 musb->vbuserr_retry
720 = VBUSERR_RETRY_COUNT;
721 tusb_musb_set_vbus(musb, 0);
722 }
723 break;
724 default:
725 break;
726 }
727 }
728 }
729
730 /* OTG timer expiration */
731 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
732 u8 devctl;
733
734 dev_dbg(musb->controller, "%s timer, %03x\n",
735 usb_otg_state_string(musb->xceiv->state), otg_stat);
736
737 switch (musb->xceiv->state) {
738 case OTG_STATE_A_WAIT_VRISE:
739 /* VBUS has probably been valid for a while now,
740 * but may well have bounced out of range a bit
741 */
742 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
743 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
744 if ((devctl & MUSB_DEVCTL_VBUS)
745 != MUSB_DEVCTL_VBUS) {
746 dev_dbg(musb->controller, "devctl %02x\n", devctl);
747 break;
748 }
749 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
750 musb->is_active = 0;
751 idle_timeout = jiffies
752 + msecs_to_jiffies(musb->a_wait_bcon);
753 } else {
754 /* REVISIT report overcurrent to hub? */
755 ERR("vbus too slow, devctl %02x\n", devctl);
756 tusb_musb_set_vbus(musb, 0);
757 }
758 break;
759 case OTG_STATE_A_WAIT_BCON:
760 if (musb->a_wait_bcon != 0)
761 idle_timeout = jiffies
762 + msecs_to_jiffies(musb->a_wait_bcon);
763 break;
764 case OTG_STATE_A_SUSPEND:
765 break;
766 case OTG_STATE_B_WAIT_ACON:
767 break;
768 default:
769 break;
770 }
771 }
772 schedule_work(&musb->irq_work);
773
774 return idle_timeout;
775 }
776
777 static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
778 {
779 struct musb *musb = __hci;
780 void __iomem *tbase = musb->ctrl_base;
781 unsigned long flags, idle_timeout = 0;
782 u32 int_mask, int_src;
783
784 spin_lock_irqsave(&musb->lock, flags);
785
786 /* Mask all interrupts to allow using both edge and level GPIO irq */
787 int_mask = musb_readl(tbase, TUSB_INT_MASK);
788 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
789
790 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
791 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
792
793 musb->int_usb = (u8) int_src;
794
795 /* Acknowledge wake-up source interrupts */
796 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
797 u32 reg;
798 u32 i;
799
800 if (tusb_get_revision(musb) == TUSB_REV_30)
801 tusb_wbus_quirk(musb, 0);
802
803 /* there are issues re-locking the PLL on wakeup ... */
804
805 /* work around issue 8 */
806 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
807 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
808 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
809 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
810 if (reg == i)
811 break;
812 dev_dbg(musb->controller, "TUSB NOR not ready\n");
813 }
814
815 /* work around issue 13 (2nd half) */
816 tusb_set_clock_source(musb, 1);
817
818 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
819 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
820 if (reg & ~TUSB_PRCM_WNORCS) {
821 musb->is_active = 1;
822 schedule_work(&musb->irq_work);
823 }
824 dev_dbg(musb->controller, "wake %sactive %02x\n",
825 musb->is_active ? "" : "in", reg);
826
827 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
828 }
829
830 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
831 del_timer(&musb_idle_timer);
832
833 /* OTG state change reports (annoyingly) not issued by Mentor core */
834 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
835 | TUSB_INT_SRC_OTG_TIMEOUT
836 | TUSB_INT_SRC_ID_STATUS_CHNG))
837 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
838
839 /* TX dma callback must be handled here, RX dma callback is
840 * handled in tusb_omap_dma_cb.
841 */
842 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
843 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
844 u32 real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
845
846 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
847 real_dma_src = ~real_dma_src & dma_src;
848 if (tusb_dma_omap() && real_dma_src) {
849 int tx_source = (real_dma_src & 0xffff);
850 int i;
851
852 for (i = 1; i <= 15; i++) {
853 if (tx_source & (1 << i)) {
854 dev_dbg(musb->controller, "completing ep%i %s\n", i, "tx");
855 musb_dma_completion(musb, i, 1);
856 }
857 }
858 }
859 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
860 }
861
862 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
863 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
864 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
865
866 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
867 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
868 musb->int_tx = (musb_src & 0xffff);
869 } else {
870 musb->int_rx = 0;
871 musb->int_tx = 0;
872 }
873
874 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
875 musb_interrupt(musb);
876
877 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
878 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
879 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
880
881 tusb_musb_try_idle(musb, idle_timeout);
882
883 musb_writel(tbase, TUSB_INT_MASK, int_mask);
884 spin_unlock_irqrestore(&musb->lock, flags);
885
886 return IRQ_HANDLED;
887 }
888
889 static int dma_off;
890
891 /*
892 * Enables TUSB6010. Caller must take care of locking.
893 * REVISIT:
894 * - Check what is unnecessary in MGC_HdrcStart()
895 */
896 static void tusb_musb_enable(struct musb *musb)
897 {
898 void __iomem *tbase = musb->ctrl_base;
899
900 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
901 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
902 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
903
904 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
905 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
906 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
907 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
908
909 /* Clear all subsystem interrups */
910 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
911 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
912 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
913
914 /* Acknowledge pending interrupt(s) */
915 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
916
917 /* Only 0 clock cycles for minimum interrupt de-assertion time and
918 * interrupt polarity active low seems to work reliably here */
919 musb_writel(tbase, TUSB_INT_CTRL_CONF,
920 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
921
922 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
923
924 /* maybe force into the Default-A OTG state machine */
925 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
926 & TUSB_DEV_OTG_STAT_ID_STATUS))
927 musb_writel(tbase, TUSB_INT_SRC_SET,
928 TUSB_INT_SRC_ID_STATUS_CHNG);
929
930 if (is_dma_capable() && dma_off)
931 printk(KERN_WARNING "%s %s: dma not reactivated\n",
932 __FILE__, __func__);
933 else
934 dma_off = 1;
935 }
936
937 /*
938 * Disables TUSB6010. Caller must take care of locking.
939 */
940 static void tusb_musb_disable(struct musb *musb)
941 {
942 void __iomem *tbase = musb->ctrl_base;
943
944 /* FIXME stop DMA, IRQs, timers, ... */
945
946 /* disable all IRQs */
947 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
948 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
949 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
950 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
951
952 del_timer(&musb_idle_timer);
953
954 if (is_dma_capable() && !dma_off) {
955 printk(KERN_WARNING "%s %s: dma still active\n",
956 __FILE__, __func__);
957 dma_off = 1;
958 }
959 }
960
961 /*
962 * Sets up TUSB6010 CPU interface specific signals and registers
963 * Note: Settings optimized for OMAP24xx
964 */
965 static void tusb_setup_cpu_interface(struct musb *musb)
966 {
967 void __iomem *tbase = musb->ctrl_base;
968
969 /*
970 * Disable GPIO[5:0] pullups (used as output DMA requests)
971 * Don't disable GPIO[7:6] as they are needed for wake-up.
972 */
973 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
974
975 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
976 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
977
978 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
979 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
980
981 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
982 * de-assertion time 2 system clocks p 62 */
983 musb_writel(tbase, TUSB_DMA_REQ_CONF,
984 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
985 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
986 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
987
988 /* Set 0 wait count for synchronous burst access */
989 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
990 }
991
992 static int tusb_musb_start(struct musb *musb)
993 {
994 void __iomem *tbase = musb->ctrl_base;
995 int ret = 0;
996 unsigned long flags;
997 u32 reg;
998
999 if (musb->board_set_power)
1000 ret = musb->board_set_power(1);
1001 if (ret != 0) {
1002 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1003 return ret;
1004 }
1005
1006 spin_lock_irqsave(&musb->lock, flags);
1007
1008 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1009 TUSB_PROD_TEST_RESET_VAL) {
1010 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1011 goto err;
1012 }
1013
1014 ret = tusb_print_revision(musb);
1015 if (ret < 2) {
1016 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1017 ret);
1018 goto err;
1019 }
1020
1021 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1022 * NOR FLASH interface is used */
1023 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1024
1025 /* Select PHY free running 60MHz as a system clock */
1026 tusb_set_clock_source(musb, 1);
1027
1028 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1029 * power saving, enable VBus detect and session end comparators,
1030 * enable IDpullup, enable VBus charging */
1031 musb_writel(tbase, TUSB_PRCM_MNGMT,
1032 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1033 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1034 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1035 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1036 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1037 tusb_setup_cpu_interface(musb);
1038
1039 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1040 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1041 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1042 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1043
1044 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1045 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1046 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1047
1048 spin_unlock_irqrestore(&musb->lock, flags);
1049
1050 return 0;
1051
1052 err:
1053 spin_unlock_irqrestore(&musb->lock, flags);
1054
1055 if (musb->board_set_power)
1056 musb->board_set_power(0);
1057
1058 return -ENODEV;
1059 }
1060
1061 static int tusb_musb_init(struct musb *musb)
1062 {
1063 struct platform_device *pdev;
1064 struct resource *mem;
1065 void __iomem *sync = NULL;
1066 int ret;
1067
1068 usb_nop_xceiv_register();
1069 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
1070 if (IS_ERR_OR_NULL(musb->xceiv))
1071 return -EPROBE_DEFER;
1072
1073 pdev = to_platform_device(musb->controller);
1074
1075 /* dma address for async dma */
1076 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1077 musb->async = mem->start;
1078
1079 /* dma address for sync dma */
1080 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1081 if (!mem) {
1082 pr_debug("no sync dma resource?\n");
1083 ret = -ENODEV;
1084 goto done;
1085 }
1086 musb->sync = mem->start;
1087
1088 sync = ioremap(mem->start, resource_size(mem));
1089 if (!sync) {
1090 pr_debug("ioremap for sync failed\n");
1091 ret = -ENOMEM;
1092 goto done;
1093 }
1094 musb->sync_va = sync;
1095
1096 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1097 * FIFOs at 0x600, TUSB at 0x800
1098 */
1099 musb->mregs += TUSB_BASE_OFFSET;
1100
1101 ret = tusb_musb_start(musb);
1102 if (ret) {
1103 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1104 ret);
1105 goto done;
1106 }
1107 musb->isr = tusb_musb_interrupt;
1108
1109 musb->xceiv->set_power = tusb_draw_power;
1110 the_musb = musb;
1111
1112 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1113
1114 done:
1115 if (ret < 0) {
1116 if (sync)
1117 iounmap(sync);
1118
1119 usb_put_phy(musb->xceiv);
1120 usb_nop_xceiv_unregister();
1121 }
1122 return ret;
1123 }
1124
1125 static int tusb_musb_exit(struct musb *musb)
1126 {
1127 del_timer_sync(&musb_idle_timer);
1128 the_musb = NULL;
1129
1130 if (musb->board_set_power)
1131 musb->board_set_power(0);
1132
1133 iounmap(musb->sync_va);
1134
1135 usb_put_phy(musb->xceiv);
1136 usb_nop_xceiv_unregister();
1137 return 0;
1138 }
1139
1140 static const struct musb_platform_ops tusb_ops = {
1141 .init = tusb_musb_init,
1142 .exit = tusb_musb_exit,
1143
1144 .enable = tusb_musb_enable,
1145 .disable = tusb_musb_disable,
1146
1147 .set_mode = tusb_musb_set_mode,
1148 .try_idle = tusb_musb_try_idle,
1149
1150 .vbus_status = tusb_musb_vbus_status,
1151 .set_vbus = tusb_musb_set_vbus,
1152 };
1153
1154 static const struct platform_device_info tusb_dev_info = {
1155 .name = "musb-hdrc",
1156 .id = PLATFORM_DEVID_AUTO,
1157 .dma_mask = DMA_BIT_MASK(32),
1158 };
1159
1160 static int tusb_probe(struct platform_device *pdev)
1161 {
1162 struct resource musb_resources[3];
1163 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
1164 struct platform_device *musb;
1165 struct tusb6010_glue *glue;
1166 struct platform_device_info pinfo;
1167 int ret = -ENOMEM;
1168
1169 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
1170 if (!glue) {
1171 dev_err(&pdev->dev, "failed to allocate glue context\n");
1172 goto err0;
1173 }
1174
1175 glue->dev = &pdev->dev;
1176
1177 pdata->platform_ops = &tusb_ops;
1178
1179 platform_set_drvdata(pdev, glue);
1180
1181 memset(musb_resources, 0x00, sizeof(*musb_resources) *
1182 ARRAY_SIZE(musb_resources));
1183
1184 musb_resources[0].name = pdev->resource[0].name;
1185 musb_resources[0].start = pdev->resource[0].start;
1186 musb_resources[0].end = pdev->resource[0].end;
1187 musb_resources[0].flags = pdev->resource[0].flags;
1188
1189 musb_resources[1].name = pdev->resource[1].name;
1190 musb_resources[1].start = pdev->resource[1].start;
1191 musb_resources[1].end = pdev->resource[1].end;
1192 musb_resources[1].flags = pdev->resource[1].flags;
1193
1194 musb_resources[2].name = pdev->resource[2].name;
1195 musb_resources[2].start = pdev->resource[2].start;
1196 musb_resources[2].end = pdev->resource[2].end;
1197 musb_resources[2].flags = pdev->resource[2].flags;
1198
1199 pinfo = tusb_dev_info;
1200 pinfo.parent = &pdev->dev;
1201 pinfo.res = musb_resources;
1202 pinfo.num_res = ARRAY_SIZE(musb_resources);
1203 pinfo.data = pdata;
1204 pinfo.size_data = sizeof(*pdata);
1205
1206 glue->musb = musb = platform_device_register_full(&pinfo);
1207 if (IS_ERR(musb)) {
1208 ret = PTR_ERR(musb);
1209 dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
1210 goto err3;
1211 }
1212
1213 return 0;
1214
1215 err3:
1216 kfree(glue);
1217
1218 err0:
1219 return ret;
1220 }
1221
1222 static int tusb_remove(struct platform_device *pdev)
1223 {
1224 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
1225
1226 platform_device_unregister(glue->musb);
1227 kfree(glue);
1228
1229 return 0;
1230 }
1231
1232 static struct platform_driver tusb_driver = {
1233 .probe = tusb_probe,
1234 .remove = tusb_remove,
1235 .driver = {
1236 .name = "musb-tusb",
1237 },
1238 };
1239
1240 MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1241 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1242 MODULE_LICENSE("GPL v2");
1243 module_platform_driver(tusb_driver);
Linux with added FPC-III support