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usb: otg: utils: rename function name in OTG utils
[deliverable/linux.git] / drivers / usb / musb / tusb6010.c
CommitLineData
550a7375
FB		 1/*
2 * TUSB6010 USB 2.0 OTG Dual Role controller
3 *
4 * Copyright (C) 2006 Nokia Corporation
550a7375
FB		 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>
240a16e2 21#include <linux/prefetch.h>
550a7375
FB		 22#include <linux/usb.h>
23#include <linux/irq.h>
24#include <linux/platform_device.h>
18688fbe 25#include <linux/dma-mapping.h>
550a7375
FB		 26
27#include "musb_core.h"
28
1add75d2
FB		 29struct tusb6010_glue {
30 struct device *dev;
31 struct platform_device *musb;
32};
33
743411b3 34static void tusb_musb_set_vbus(struct musb *musb, int is_on);
550a7375
FB		 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 */
43u8 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}
9a35f876 59EXPORT_SYMBOL_GPL(tusb_get_revision);
550a7375 60
743411b3 61static int tusb_print_revision(struct musb *musb)
550a7375
FB		 62{
63 void __iomem *tbase = musb->ctrl_base;
64 u8 rev;
65
66 rev = tusb_get_revision(musb);
67
68 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
69 "prcm",
70 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
71 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
72 "int",
73 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
74 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
75 "gpio",
76 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
77 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
78 "dma",
79 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
80 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
81 "dieid",
82 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
83 "rev",
84 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
85
86 return tusb_get_revision(musb);
87}
88
89#define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
90 | TUSB_PHY_OTG_CTRL_TESTM0)
91
92/*
93 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
94 * Disables power detection in PHY for the duration of idle.
95 */
96static void tusb_wbus_quirk(struct musb *musb, int enabled)
97{
98 void __iomem *tbase = musb->ctrl_base;
99 static u32 phy_otg_ctrl, phy_otg_ena;
100 u32 tmp;
101
102 if (enabled) {
103 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
104 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
105 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
106 | phy_otg_ena | WBUS_QUIRK_MASK;
107 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
108 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
109 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
110 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
5c8a86e1 111 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
550a7375
FB		 112 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
113 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
114 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
115 & TUSB_PHY_OTG_CTRL_TESTM2) {
116 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
117 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
118 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
119 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
5c8a86e1 120 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
550a7375
FB		 121 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
122 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
123 phy_otg_ctrl = 0;
124 phy_otg_ena = 0;
125 }
126}
127
128/*
129 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
130 * so both loading and unloading FIFOs need explicit byte counts.
131 */
132
133static inline void
134tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
135{
136 u32 val;
137 int i;
138
139 if (len > 4) {
140 for (i = 0; i < (len >> 2); i++) {
141 memcpy(&val, buf, 4);
142 musb_writel(fifo, 0, val);
143 buf += 4;
144 }
145 len %= 4;
146 }
147 if (len > 0) {
148 /* Write the rest 1 - 3 bytes to FIFO */
149 memcpy(&val, buf, len);
150 musb_writel(fifo, 0, val);
151 }
152}
153
154static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
155 void __iomem *buf, u16 len)
156{
157 u32 val;
158 int i;
159
160 if (len > 4) {
161 for (i = 0; i < (len >> 2); i++) {
162 val = musb_readl(fifo, 0);
163 memcpy(buf, &val, 4);
164 buf += 4;
165 }
166 len %= 4;
167 }
168 if (len > 0) {
169 /* Read the rest 1 - 3 bytes from FIFO */
170 val = musb_readl(fifo, 0);
171 memcpy(buf, &val, len);
172 }
173}
174
175void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
176{
28e49705 177 struct musb *musb = hw_ep->musb;
550a7375
FB		 178 void __iomem *ep_conf = hw_ep->conf;
179 void __iomem *fifo = hw_ep->fifo;
180 u8 epnum = hw_ep->epnum;
181
182 prefetch(buf);
183
5c8a86e1 184 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
550a7375
FB		 185 'T', epnum, fifo, len, buf);
186
187 if (epnum)
188 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
189 TUSB_EP_CONFIG_XFR_SIZE(len));
190 else
191 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
192 TUSB_EP0_CONFIG_XFR_SIZE(len));
193
194 if (likely((0x01 & (unsigned long) buf) == 0)) {
195
196 /* Best case is 32bit-aligned destination address */
197 if ((0x02 & (unsigned long) buf) == 0) {
198 if (len >= 4) {
199 writesl(fifo, buf, len >> 2);
200 buf += (len & ~0x03);
201 len &= 0x03;
202 }
203 } else {
204 if (len >= 2) {
205 u32 val;
206 int i;
207
208 /* Cannot use writesw, fifo is 32-bit */
209 for (i = 0; i < (len >> 2); i++) {
210 val = (u32)(*(u16 *)buf);
211 buf += 2;
212 val |= (*(u16 *)buf) << 16;
213 buf += 2;
214 musb_writel(fifo, 0, val);
215 }
216 len &= 0x03;
217 }
218 }
219 }
220
221 if (len > 0)
222 tusb_fifo_write_unaligned(fifo, buf, len);
223}
224
225void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
226{
28e49705 227 struct musb *musb = hw_ep->musb;
550a7375
FB		 228 void __iomem *ep_conf = hw_ep->conf;
229 void __iomem *fifo = hw_ep->fifo;
230 u8 epnum = hw_ep->epnum;
231
5c8a86e1 232 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
550a7375
FB		 233 'R', epnum, fifo, len, buf);
234
235 if (epnum)
236 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
237 TUSB_EP_CONFIG_XFR_SIZE(len));
238 else
239 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
240
241 if (likely((0x01 & (unsigned long) buf) == 0)) {
242
243 /* Best case is 32bit-aligned destination address */
244 if ((0x02 & (unsigned long) buf) == 0) {
245 if (len >= 4) {
246 readsl(fifo, buf, len >> 2);
247 buf += (len & ~0x03);
248 len &= 0x03;
249 }
250 } else {
251 if (len >= 2) {
252 u32 val;
253 int i;
254
255 /* Cannot use readsw, fifo is 32-bit */
256 for (i = 0; i < (len >> 2); i++) {
257 val = musb_readl(fifo, 0);
258 *(u16 *)buf = (u16)(val & 0xffff);
259 buf += 2;
260 *(u16 *)buf = (u16)(val >> 16);
261 buf += 2;
262 }
263 len &= 0x03;
264 }
265 }
266 }
267
268 if (len > 0)
269 tusb_fifo_read_unaligned(fifo, buf, len);
270}
271
84e250ff
DB		 272static struct musb *the_musb;
273
550a7375
FB		 274/* This is used by gadget drivers, and OTG transceiver logic, allowing
275 * at most mA current to be drawn from VBUS during a Default-B session
276 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
277 * mode), or low power Default-B sessions, something else supplies power.
278 * Caller must take care of locking.
279 */
86753811 280static int tusb_draw_power(struct usb_phy *x, unsigned mA)
550a7375 281{
84e250ff 282 struct musb *musb = the_musb;
550a7375
FB		 283 void __iomem *tbase = musb->ctrl_base;
284 u32 reg;
285
550a7375
FB		 286 /* tps65030 seems to consume max 100mA, with maybe 60mA available
287 * (measured on one board) for things other than tps and tusb.
288 *
289 * Boards sharing the CPU clock with CLKIN will need to prevent
290 * certain idle sleep states while the USB link is active.
291 *
292 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
293 * The actual current usage would be very board-specific. For now,
294 * it's simpler to just use an aggregate (also board-specific).
295 */
d445b6da 296 if (x->otg->default_a || mA < (musb->min_power << 1))
550a7375
FB		 297 mA = 0;
298
299 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
300 if (mA) {
301 musb->is_bus_powered = 1;
302 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
303 } else {
304 musb->is_bus_powered = 0;
305 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
306 }
307 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
308
5c8a86e1 309 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
550a7375
FB		 310 return 0;
311}
312
550a7375
FB		 313/* workaround for issue 13: change clock during chip idle
314 * (to be fixed in rev3 silicon) ... symptoms include disconnect
315 * or looping suspend/resume cycles
316 */
317static void tusb_set_clock_source(struct musb *musb, unsigned mode)
318{
319 void __iomem *tbase = musb->ctrl_base;
320 u32 reg;
321
322 reg = musb_readl(tbase, TUSB_PRCM_CONF);
323 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
324
325 /* 0 = refclk (clkin, XI)
326 * 1 = PHY 60 MHz (internal PLL)
327 * 2 = not supported
328 * 3 = what?
329 */
330 if (mode > 0)
331 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
332
333 musb_writel(tbase, TUSB_PRCM_CONF, reg);
334
335 /* FIXME tusb6010_platform_retime(mode == 0); */
336}
337
338/*
339 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
340 * Other code ensures that we idle unless we're connected _and_ the
341 * USB link is not suspended ... and tells us the relevant wakeup
342 * events. SW_EN for voltage is handled separately.
343 */
743411b3 344static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
550a7375
FB		 345{
346 void __iomem *tbase = musb->ctrl_base;
347 u32 reg;
348
349 if ((wakeup_enables & TUSB_PRCM_WBUS)
350 && (tusb_get_revision(musb) == TUSB_REV_30))
351 tusb_wbus_quirk(musb, 1);
352
353 tusb_set_clock_source(musb, 0);
354
355 wakeup_enables |= TUSB_PRCM_WNORCS;
356 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
357
358 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
359 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
360 * Presumably that's mostly to save power, hence WID is immaterial ...
361 */
362
363 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
364 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
365 if (is_host_active(musb)) {
366 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
367 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
368 } else {
369 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
370 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
371 }
372 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
373 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
374
5c8a86e1 375 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
550a7375
FB		 376}
377
378/*
379 * Updates cable VBUS status. Caller must take care of locking.
380 */
743411b3 381static int tusb_musb_vbus_status(struct musb *musb)
550a7375
FB		 382{
383 void __iomem *tbase = musb->ctrl_base;
384 u32 otg_stat, prcm_mngmt;
385 int ret = 0;
386
387 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
388 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
389
390 /* Temporarily enable VBUS detection if it was disabled for
391 * suspend mode. Unless it's enabled otg_stat and devctl will
392 * not show correct VBUS state.
393 */
394 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
395 u32 tmp = prcm_mngmt;
396 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
397 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
398 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
399 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
400 }
401
402 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
403 ret = 1;
404
405 return ret;
406}
407
408static struct timer_list musb_idle_timer;
409
410static void musb_do_idle(unsigned long _musb)
411{
412 struct musb *musb = (void *)_musb;
413 unsigned long flags;
414
415 spin_lock_irqsave(&musb->lock, flags);
416
84e250ff 417 switch (musb->xceiv->state) {
550a7375
FB		 418 case OTG_STATE_A_WAIT_BCON:
419 if ((musb->a_wait_bcon != 0)
420 && (musb->idle_timeout == 0
421 || time_after(jiffies, musb->idle_timeout))) {
5c8a86e1 422 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
3df00453 423 otg_state_string(musb->xceiv->state));
550a7375
FB		 424 }
425 /* FALLTHROUGH */
426 case OTG_STATE_A_IDLE:
743411b3 427 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 428 default:
429 break;
430 }
431
432 if (!musb->is_active) {
433 u32 wakeups;
434
435 /* wait until khubd handles port change status */
436 if (is_host_active(musb) && (musb->port1_status >> 16))
437 goto done;
438
62285963 439 if (is_peripheral_enabled(musb) && !musb->gadget_driver) {
550a7375 440 wakeups = 0;
62285963 441 } else {
550a7375 442 wakeups = TUSB_PRCM_WHOSTDISCON
62285963 443 | TUSB_PRCM_WBUS
550a7375
FB		 444 | TUSB_PRCM_WVBUS;
445 if (is_otg_enabled(musb))
446 wakeups |= TUSB_PRCM_WID;
447 }
550a7375
FB		 448 tusb_allow_idle(musb, wakeups);
449 }
450done:
451 spin_unlock_irqrestore(&musb->lock, flags);
452}
453
454/*
455 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
456 * like "disconnected" or "suspended". We'll be woken out of it by
457 * connect, resume, or disconnect.
458 *
459 * Needs to be called as the last function everywhere where there is
460 * register access to TUSB6010 because of NOR flash wake-up.
461 * Caller should own controller spinlock.
462 *
463 * Delay because peripheral enables D+ pullup 3msec after SE0, and
464 * we don't want to treat that full speed J as a wakeup event.
465 * ... peripherals must draw only suspend current after 10 msec.
466 */
743411b3 467static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375
FB		 468{
469 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
470 static unsigned long last_timer;
471
472 if (timeout == 0)
473 timeout = default_timeout;
474
475 /* Never idle if active, or when VBUS timeout is not set as host */
476 if (musb->is_active || ((musb->a_wait_bcon == 0)
84e250ff 477 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
5c8a86e1 478 dev_dbg(musb->controller, "%s active, deleting timer\n",
3df00453 479 otg_state_string(musb->xceiv->state));
550a7375
FB		 480 del_timer(&musb_idle_timer);
481 last_timer = jiffies;
482 return;
483 }
484
485 if (time_after(last_timer, timeout)) {
486 if (!timer_pending(&musb_idle_timer))
487 last_timer = timeout;
488 else {
5c8a86e1 489 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
550a7375
FB		 490 return;
491 }
492 }
493 last_timer = timeout;
494
5c8a86e1 495 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
3df00453 496 otg_state_string(musb->xceiv->state),
550a7375
FB		 497 (unsigned long)jiffies_to_msecs(timeout - jiffies));
498 mod_timer(&musb_idle_timer, timeout);
499}
500
501/* ticks of 60 MHz clock */
502#define DEVCLOCK 60000000
503#define OTG_TIMER_MS(msecs) ((msecs) \
504 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
505 | TUSB_DEV_OTG_TIMER_ENABLE) \
506 : 0)
507
743411b3 508static void tusb_musb_set_vbus(struct musb *musb, int is_on)
550a7375
FB		 509{
510 void __iomem *tbase = musb->ctrl_base;
511 u32 conf, prcm, timer;
512 u8 devctl;
d445b6da 513 struct usb_otg *otg = musb->xceiv->otg;
550a7375
FB		 514
515 /* HDRC controls CPEN, but beware current surges during device
516 * connect. They can trigger transient overcurrent conditions
517 * that must be ignored.
518 */
519
520 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
521 conf = musb_readl(tbase, TUSB_DEV_CONF);
522 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
523
524 if (is_on) {
550a7375 525 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
d445b6da 526 otg->default_a = 1;
84e250ff 527 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
550a7375
FB		 528 devctl |= MUSB_DEVCTL_SESSION;
529
530 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
531 MUSB_HST_MODE(musb);
532 } else {
533 u32 otg_stat;
534
535 timer = 0;
536
537 /* If ID pin is grounded, we want to be a_idle */
538 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
539 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
84e250ff 540 switch (musb->xceiv->state) {
550a7375
FB		 541 case OTG_STATE_A_WAIT_VRISE:
542 case OTG_STATE_A_WAIT_BCON:
84e250ff 543 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
550a7375
FB		 544 break;
545 case OTG_STATE_A_WAIT_VFALL:
84e250ff 546 musb->xceiv->state = OTG_STATE_A_IDLE;
550a7375
FB		 547 break;
548 default:
84e250ff 549 musb->xceiv->state = OTG_STATE_A_IDLE;
550a7375
FB		 550 }
551 musb->is_active = 0;
d445b6da 552 otg->default_a = 1;
550a7375
FB		 553 MUSB_HST_MODE(musb);
554 } else {
555 musb->is_active = 0;
d445b6da 556 otg->default_a = 0;
84e250ff 557 musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375
FB		 558 MUSB_DEV_MODE(musb);
559 }
560
561 devctl &= ~MUSB_DEVCTL_SESSION;
562 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
550a7375
FB		 563 }
564 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
565
566 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
567 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
568 musb_writel(tbase, TUSB_DEV_CONF, conf);
569 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
570
5c8a86e1 571 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
3df00453 572 otg_state_string(musb->xceiv->state),
550a7375
FB		 573 musb_readb(musb->mregs, MUSB_DEVCTL),
574 musb_readl(tbase, TUSB_DEV_OTG_STAT),
575 conf, prcm);
576}
577
578/*
579 * Sets the mode to OTG, peripheral or host by changing the ID detection.
580 * Caller must take care of locking.
581 *
582 * Note that if a mini-A cable is plugged in the ID line will stay down as
583 * the weak ID pull-up is not able to pull the ID up.
584 *
585 * REVISIT: It would be possible to add support for changing between host
586 * and peripheral modes in non-OTG configurations by reconfiguring hardware
587 * and then setting musb->board_mode. For now, only support OTG mode.
588 */
743411b3 589static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375
FB		 590{
591 void __iomem *tbase = musb->ctrl_base;
592 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
593
594 if (musb->board_mode != MUSB_OTG) {
595 ERR("Changing mode currently only supported in OTG mode\n");
14a2c96f 596 return -EINVAL;
550a7375
FB		 597 }
598
599 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
600 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
601 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
602 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
603
604 switch (musb_mode) {
605
550a7375
FB		 606 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
607 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
608 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
609 dev_conf |= TUSB_DEV_CONF_ID_SEL;
610 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
611 break;
550a7375
FB		 612 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
613 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
614 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
615 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
616 break;
550a7375
FB		 617 case MUSB_OTG: /* Use PHY ID detection */
618 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
619 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
620 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
621 break;
550a7375
FB		 622
623 default:
5c8a86e1 624 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
96a274d1 625 return -EINVAL;
550a7375
FB		 626 }
627
628 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
629 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
630 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
631 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
632 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
633
634 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
635 if ((musb_mode == MUSB_PERIPHERAL) &&
636 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
637 INFO("Cannot be peripheral with mini-A cable "
638 "otg_stat: %08x\n", otg_stat);
96a274d1
DB		 639
640 return 0;
550a7375
FB		 641}
642
643static inline unsigned long
644tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
645{
646 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
647 unsigned long idle_timeout = 0;
d445b6da 648 struct usb_otg *otg = musb->xceiv->otg;
550a7375
FB		 649
650 /* ID pin */
651 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
652 int default_a;
653
654 if (is_otg_enabled(musb))
655 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
656 else
657 default_a = is_host_enabled(musb);
5c8a86e1 658 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
d445b6da 659 otg->default_a = default_a;
743411b3 660 tusb_musb_set_vbus(musb, default_a);
550a7375
FB		 661
662 /* Don't allow idling immediately */
663 if (default_a)
664 idle_timeout = jiffies + (HZ * 3);
665 }
666
667 /* VBUS state change */
668 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
669
670 /* B-dev state machine: no vbus ~= disconnect */
d445b6da 671 if ((is_otg_enabled(musb) && !otg->default_a)
550a7375 672 || !is_host_enabled(musb)) {
550a7375
FB		 673 /* ? musb_root_disconnect(musb); */
674 musb->port1_status &=
675 ~(USB_PORT_STAT_CONNECTION
676 | USB_PORT_STAT_ENABLE
677 | USB_PORT_STAT_LOW_SPEED
678 | USB_PORT_STAT_HIGH_SPEED
679 | USB_PORT_STAT_TEST
680 );
550a7375
FB		 681
682 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
5c8a86e1 683 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
84e250ff 684 if (musb->xceiv->state != OTG_STATE_B_IDLE) {
550a7375 685 /* INTR_DISCONNECT can hide... */
84e250ff 686 musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375
FB		 687 musb->int_usb |= MUSB_INTR_DISCONNECT;
688 }
689 musb->is_active = 0;
690 }
5c8a86e1 691 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
3df00453 692 otg_state_string(musb->xceiv->state), otg_stat);
550a7375
FB		 693 idle_timeout = jiffies + (1 * HZ);
694 schedule_work(&musb->irq_work);
695
696 } else /* A-dev state machine */ {
5c8a86e1 697 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
3df00453 698 otg_state_string(musb->xceiv->state), otg_stat);
550a7375 699
84e250ff 700 switch (musb->xceiv->state) {
550a7375 701 case OTG_STATE_A_IDLE:
5c8a86e1 702 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
743411b3 703 musb_platform_set_vbus(musb, 1);
550a7375
FB		 704
705 /* CONNECT can wake if a_wait_bcon is set */
706 if (musb->a_wait_bcon != 0)
707 musb->is_active = 0;
708 else
709 musb->is_active = 1;
710
711 /*
712 * OPT FS A TD.4.6 needs few seconds for
713 * A_WAIT_VRISE
714 */
715 idle_timeout = jiffies + (2 * HZ);
716
717 break;
718 case OTG_STATE_A_WAIT_VRISE:
719 /* ignore; A-session-valid < VBUS_VALID/2,
720 * we monitor this with the timer
721 */
722 break;
723 case OTG_STATE_A_WAIT_VFALL:
724 /* REVISIT this irq triggers during short
725 * spikes caused by enumeration ...
726 */
727 if (musb->vbuserr_retry) {
728 musb->vbuserr_retry--;
743411b3 729 tusb_musb_set_vbus(musb, 1);
550a7375
FB		 730 } else {
731 musb->vbuserr_retry
732 = VBUSERR_RETRY_COUNT;
743411b3 733 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 734 }
735 break;
736 default:
737 break;
738 }
739 }
740 }
741
742 /* OTG timer expiration */
743 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
744 u8 devctl;
745
5c8a86e1 746 dev_dbg(musb->controller, "%s timer, %03x\n",
3df00453 747 otg_state_string(musb->xceiv->state), otg_stat);
550a7375 748
84e250ff 749 switch (musb->xceiv->state) {
550a7375
FB		 750 case OTG_STATE_A_WAIT_VRISE:
751 /* VBUS has probably been valid for a while now,
752 * but may well have bounced out of range a bit
753 */
754 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
755 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
756 if ((devctl & MUSB_DEVCTL_VBUS)
757 != MUSB_DEVCTL_VBUS) {
5c8a86e1 758 dev_dbg(musb->controller, "devctl %02x\n", devctl);
550a7375
FB		 759 break;
760 }
84e250ff 761 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375
FB		 762 musb->is_active = 0;
763 idle_timeout = jiffies
764 + msecs_to_jiffies(musb->a_wait_bcon);
765 } else {
766 /* REVISIT report overcurrent to hub? */
767 ERR("vbus too slow, devctl %02x\n", devctl);
743411b3 768 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 769 }
770 break;
771 case OTG_STATE_A_WAIT_BCON:
772 if (musb->a_wait_bcon != 0)
773 idle_timeout = jiffies
774 + msecs_to_jiffies(musb->a_wait_bcon);
775 break;
776 case OTG_STATE_A_SUSPEND:
777 break;
778 case OTG_STATE_B_WAIT_ACON:
779 break;
780 default:
781 break;
782 }
783 }
784 schedule_work(&musb->irq_work);
785
786 return idle_timeout;
787}
788
743411b3 789static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
550a7375
FB		 790{
791 struct musb *musb = __hci;
792 void __iomem *tbase = musb->ctrl_base;
793 unsigned long flags, idle_timeout = 0;
794 u32 int_mask, int_src;
795
796 spin_lock_irqsave(&musb->lock, flags);
797
798 /* Mask all interrupts to allow using both edge and level GPIO irq */
799 int_mask = musb_readl(tbase, TUSB_INT_MASK);
800 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
801
802 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
5c8a86e1 803 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
550a7375
FB		 804
805 musb->int_usb = (u8) int_src;
806
807 /* Acknowledge wake-up source interrupts */
808 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
809 u32 reg;
810 u32 i;
811
812 if (tusb_get_revision(musb) == TUSB_REV_30)
813 tusb_wbus_quirk(musb, 0);
814
815 /* there are issues re-locking the PLL on wakeup ... */
816
817 /* work around issue 8 */
818 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
819 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
820 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
821 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
822 if (reg == i)
823 break;
5c8a86e1 824 dev_dbg(musb->controller, "TUSB NOR not ready\n");
550a7375
FB		 825 }
826
827 /* work around issue 13 (2nd half) */
828 tusb_set_clock_source(musb, 1);
829
830 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
831 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
832 if (reg & ~TUSB_PRCM_WNORCS) {
833 musb->is_active = 1;
834 schedule_work(&musb->irq_work);
835 }
5c8a86e1 836 dev_dbg(musb->controller, "wake %sactive %02x\n",
550a7375
FB		 837 musb->is_active ? "" : "in", reg);
838
839 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
840 }
841
842 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
843 del_timer(&musb_idle_timer);
844
845 /* OTG state change reports (annoyingly) not issued by Mentor core */
846 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
847 | TUSB_INT_SRC_OTG_TIMEOUT
848 | TUSB_INT_SRC_ID_STATUS_CHNG))
849 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
850
851 /* TX dma callback must be handled here, RX dma callback is
852 * handled in tusb_omap_dma_cb.
853 */
854 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
855 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
856 u32 real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
857
5c8a86e1 858 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
550a7375
FB		 859 real_dma_src = ~real_dma_src & dma_src;
860 if (tusb_dma_omap() && real_dma_src) {
861 int tx_source = (real_dma_src & 0xffff);
862 int i;
863
864 for (i = 1; i <= 15; i++) {
865 if (tx_source & (1 << i)) {
5c8a86e1 866 dev_dbg(musb->controller, "completing ep%i %s\n", i, "tx");
550a7375
FB		 867 musb_dma_completion(musb, i, 1);
868 }
869 }
870 }
871 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
872 }
873
874 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
875 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
876 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
877
878 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
879 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
880 musb->int_tx = (musb_src & 0xffff);
881 } else {
882 musb->int_rx = 0;
883 musb->int_tx = 0;
884 }
885
886 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
887 musb_interrupt(musb);
888
889 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
890 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
891 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
892
743411b3 893 tusb_musb_try_idle(musb, idle_timeout);
550a7375
FB		 894
895 musb_writel(tbase, TUSB_INT_MASK, int_mask);
896 spin_unlock_irqrestore(&musb->lock, flags);
897
898 return IRQ_HANDLED;
899}
900
901static int dma_off;
902
903/*
904 * Enables TUSB6010. Caller must take care of locking.
905 * REVISIT:
906 * - Check what is unnecessary in MGC_HdrcStart()
907 */
743411b3 908static void tusb_musb_enable(struct musb *musb)
550a7375
FB		 909{
910 void __iomem *tbase = musb->ctrl_base;
911
912 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
913 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
914 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
915
916 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
917 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
918 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
919 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
920
921 /* Clear all subsystem interrups */
922 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
923 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
924 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
925
926 /* Acknowledge pending interrupt(s) */
927 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
928
929 /* Only 0 clock cycles for minimum interrupt de-assertion time and
930 * interrupt polarity active low seems to work reliably here */
931 musb_writel(tbase, TUSB_INT_CTRL_CONF,
932 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
933
dced35ae 934 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
550a7375
FB		 935
936 /* maybe force into the Default-A OTG state machine */
937 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
938 & TUSB_DEV_OTG_STAT_ID_STATUS))
939 musb_writel(tbase, TUSB_INT_SRC_SET,
940 TUSB_INT_SRC_ID_STATUS_CHNG);
941
942 if (is_dma_capable() && dma_off)
943 printk(KERN_WARNING "%s %s: dma not reactivated\n",
944 __FILE__, __func__);
945 else
946 dma_off = 1;
947}
948
949/*
950 * Disables TUSB6010. Caller must take care of locking.
951 */
743411b3 952static void tusb_musb_disable(struct musb *musb)
550a7375
FB		 953{
954 void __iomem *tbase = musb->ctrl_base;
955
956 /* FIXME stop DMA, IRQs, timers, ... */
957
958 /* disable all IRQs */
959 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
960 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
961 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
962 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
963
964 del_timer(&musb_idle_timer);
965
966 if (is_dma_capable() && !dma_off) {
967 printk(KERN_WARNING "%s %s: dma still active\n",
968 __FILE__, __func__);
969 dma_off = 1;
970 }
971}
972
973/*
974 * Sets up TUSB6010 CPU interface specific signals and registers
975 * Note: Settings optimized for OMAP24xx
976 */
743411b3 977static void tusb_setup_cpu_interface(struct musb *musb)
550a7375
FB		 978{
979 void __iomem *tbase = musb->ctrl_base;
980
981 /*
982 * Disable GPIO[5:0] pullups (used as output DMA requests)
983 * Don't disable GPIO[7:6] as they are needed for wake-up.
984 */
985 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
986
987 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
988 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
989
990 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
991 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
992
993 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
994 * de-assertion time 2 system clocks p 62 */
995 musb_writel(tbase, TUSB_DMA_REQ_CONF,
996 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
997 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
998 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
999
1000 /* Set 0 wait count for synchronous burst access */
1001 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
1002}
1003
743411b3 1004static int tusb_musb_start(struct musb *musb)
550a7375
FB		 1005{
1006 void __iomem *tbase = musb->ctrl_base;
1007 int ret = 0;
1008 unsigned long flags;
1009 u32 reg;
1010
1011 if (musb->board_set_power)
1012 ret = musb->board_set_power(1);
1013 if (ret != 0) {
1014 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1015 return ret;
1016 }
1017
1018 spin_lock_irqsave(&musb->lock, flags);
1019
1020 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1021 TUSB_PROD_TEST_RESET_VAL) {
1022 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1023 goto err;
1024 }
1025
1026 ret = tusb_print_revision(musb);
1027 if (ret < 2) {
1028 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1029 ret);
1030 goto err;
1031 }
1032
1033 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1034 * NOR FLASH interface is used */
1035 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1036
1037 /* Select PHY free running 60MHz as a system clock */
1038 tusb_set_clock_source(musb, 1);
1039
1040 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1041 * power saving, enable VBus detect and session end comparators,
1042 * enable IDpullup, enable VBus charging */
1043 musb_writel(tbase, TUSB_PRCM_MNGMT,
1044 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1045 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1046 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1047 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1048 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1049 tusb_setup_cpu_interface(musb);
1050
1051 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1052 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1053 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1054 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1055
1056 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1057 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1058 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1059
1060 spin_unlock_irqrestore(&musb->lock, flags);
1061
1062 return 0;
1063
1064err:
1065 spin_unlock_irqrestore(&musb->lock, flags);
1066
1067 if (musb->board_set_power)
1068 musb->board_set_power(0);
1069
1070 return -ENODEV;
1071}
1072
743411b3 1073static int tusb_musb_init(struct musb *musb)
550a7375
FB		 1074{
1075 struct platform_device *pdev;
1076 struct resource *mem;
84e250ff 1077 void __iomem *sync = NULL;
550a7375
FB		 1078 int ret;
1079
84e250ff 1080 usb_nop_xceiv_register();
721002ec 1081 musb->xceiv = usb_get_phy();
84e250ff
DB		 1082 if (!musb->xceiv)
1083 return -ENODEV;
1084
550a7375
FB		 1085 pdev = to_platform_device(musb->controller);
1086
1087 /* dma address for async dma */
1088 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1089 musb->async = mem->start;
1090
1091 /* dma address for sync dma */
1092 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1093 if (!mem) {
1094 pr_debug("no sync dma resource?\n");
84e250ff
DB		 1095 ret = -ENODEV;
1096 goto done;
550a7375
FB		 1097 }
1098 musb->sync = mem->start;
1099
3d268645 1100 sync = ioremap(mem->start, resource_size(mem));
550a7375
FB		 1101 if (!sync) {
1102 pr_debug("ioremap for sync failed\n");
84e250ff
DB		 1103 ret = -ENOMEM;
1104 goto done;
550a7375
FB		 1105 }
1106 musb->sync_va = sync;
1107
1108 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1109 * FIFOs at 0x600, TUSB at 0x800
1110 */
1111 musb->mregs += TUSB_BASE_OFFSET;
1112
743411b3 1113 ret = tusb_musb_start(musb);
550a7375
FB		 1114 if (ret) {
1115 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1116 ret);
84e250ff 1117 goto done;
550a7375 1118 }
743411b3 1119 musb->isr = tusb_musb_interrupt;
550a7375 1120
84e250ff
DB		 1121 if (is_peripheral_enabled(musb)) {
1122 musb->xceiv->set_power = tusb_draw_power;
1123 the_musb = musb;
1124 }
550a7375
FB		 1125
1126 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1127
84e250ff
DB		 1128done:
1129 if (ret < 0) {
1130 if (sync)
1131 iounmap(sync);
f4053874 1132
721002ec 1133 usb_put_phy(musb->xceiv);
84e250ff
DB		 1134 usb_nop_xceiv_unregister();
1135 }
550a7375
FB		 1136 return ret;
1137}
1138
743411b3 1139static int tusb_musb_exit(struct musb *musb)
550a7375
FB		 1140{
1141 del_timer_sync(&musb_idle_timer);
84e250ff 1142 the_musb = NULL;
550a7375
FB		 1143
1144 if (musb->board_set_power)
1145 musb->board_set_power(0);
1146
1147 iounmap(musb->sync_va);
f4053874 1148
721002ec 1149 usb_put_phy(musb->xceiv);
84e250ff 1150 usb_nop_xceiv_unregister();
550a7375
FB		 1151 return 0;
1152}
743411b3 1153
f7ec9437 1154static const struct musb_platform_ops tusb_ops = {
743411b3
FB		 1155 .init = tusb_musb_init,
1156 .exit = tusb_musb_exit,
1157
1158 .enable = tusb_musb_enable,
1159 .disable = tusb_musb_disable,
1160
1161 .set_mode = tusb_musb_set_mode,
1162 .try_idle = tusb_musb_try_idle,
1163
1164 .vbus_status = tusb_musb_vbus_status,
1165 .set_vbus = tusb_musb_set_vbus,
1166};
18688fbe
FB		 1167
1168static u64 tusb_dmamask = DMA_BIT_MASK(32);
1169
e9e8c85e 1170static int __devinit tusb_probe(struct platform_device *pdev)
18688fbe
FB		 1171{
1172 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
1173 struct platform_device *musb;
1add75d2 1174 struct tusb6010_glue *glue;
18688fbe
FB		 1175
1176 int ret = -ENOMEM;
1177
1add75d2
FB		 1178 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
1179 if (!glue) {
1180 dev_err(&pdev->dev, "failed to allocate glue context\n");
1181 goto err0;
1182 }
1183
18688fbe
FB		 1184 musb = platform_device_alloc("musb-hdrc", -1);
1185 if (!musb) {
1186 dev_err(&pdev->dev, "failed to allocate musb device\n");
1add75d2 1187 goto err1;
18688fbe
FB		 1188 }
1189
1190 musb->dev.parent = &pdev->dev;
1191 musb->dev.dma_mask = &tusb_dmamask;
1192 musb->dev.coherent_dma_mask = tusb_dmamask;
1193
1add75d2
FB		 1194 glue->dev = &pdev->dev;
1195 glue->musb = musb;
1196
f7ec9437
FB		 1197 pdata->platform_ops = &tusb_ops;
1198
1add75d2 1199 platform_set_drvdata(pdev, glue);
18688fbe
FB		 1200
1201 ret = platform_device_add_resources(musb, pdev->resource,
1202 pdev->num_resources);
1203 if (ret) {
1204 dev_err(&pdev->dev, "failed to add resources\n");
1add75d2 1205 goto err2;
18688fbe
FB		 1206 }
1207
1208 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
1209 if (ret) {
1210 dev_err(&pdev->dev, "failed to add platform_data\n");
1add75d2 1211 goto err2;
18688fbe
FB		 1212 }
1213
1214 ret = platform_device_add(musb);
1215 if (ret) {
1216 dev_err(&pdev->dev, "failed to register musb device\n");
1217 goto err1;
1218 }
1219
1220 return 0;
1221
1add75d2 1222err2:
18688fbe
FB		 1223 platform_device_put(musb);
1224
1add75d2
FB		 1225err1:
1226 kfree(glue);
1227
18688fbe
FB		 1228err0:
1229 return ret;
1230}
1231
e9e8c85e 1232static int __devexit tusb_remove(struct platform_device *pdev)
18688fbe 1233{
1add75d2 1234 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
18688fbe 1235
1add75d2
FB		 1236 platform_device_del(glue->musb);
1237 platform_device_put(glue->musb);
1238 kfree(glue);
18688fbe
FB		 1239
1240 return 0;
1241}
1242
1243static struct platform_driver tusb_driver = {
e9e8c85e
FB		 1244 .probe = tusb_probe,
1245 .remove = __devexit_p(tusb_remove),
18688fbe
FB		 1246 .driver = {
1247 .name = "musb-tusb",
1248 },
1249};
1250
1251MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1252MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1253MODULE_LICENSE("GPL v2");
1254
1255static int __init tusb_init(void)
1256{
e9e8c85e 1257 return platform_driver_register(&tusb_driver);
18688fbe 1258}
e9e8c85e 1259module_init(tusb_init);
18688fbe
FB		 1260
1261static void __exit tusb_exit(void)
1262{
1263 platform_driver_unregister(&tusb_driver);
1264}
1265module_exit(tusb_exit);
Linux kernel - Deliverables
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