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Merge tag 'hwmon-for-linus-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-block.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>
ded017ee 20#include <linux/err.h>
240a16e2 21#include <linux/prefetch.h>
550a7375
FB		 22#include <linux/usb.h>
23#include <linux/irq.h>
56c82cdc 24#include <linux/io.h>
cdfe35fb 25#include <linux/device.h>
550a7375 26#include <linux/platform_device.h>
18688fbe 27#include <linux/dma-mapping.h>
d7078df6 28#include <linux/usb/usb_phy_generic.h>
550a7375
FB		 29
30#include "musb_core.h"
31
1add75d2
FB		 32struct tusb6010_glue {
33 struct device *dev;
34 struct platform_device *musb;
2f36ff69 35 struct platform_device *phy;
1add75d2
FB		 36};
37
743411b3 38static void tusb_musb_set_vbus(struct musb *musb, int is_on);
550a7375
FB		 39
40#define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
41#define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
42
43/*
44 * Checks the revision. We need to use the DMA register as 3.0 does not
45 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
46 */
7751b6fb 47static u8 tusb_get_revision(struct musb *musb)
550a7375
FB		 48{
49 void __iomem *tbase = musb->ctrl_base;
50 u32 die_id;
51 u8 rev;
52
53 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
54 if (TUSB_REV_MAJOR(rev) == 3) {
55 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
56 TUSB_DIDR1_HI));
57 if (die_id >= TUSB_DIDR1_HI_REV_31)
58 rev |= 1;
59 }
60
61 return rev;
62}
63
7751b6fb 64static void tusb_print_revision(struct musb *musb)
550a7375
FB		 65{
66 void __iomem *tbase = musb->ctrl_base;
67 u8 rev;
68
7751b6fb 69 rev = musb->tusb_revision;
550a7375
FB		 70
71 pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
72 "prcm",
73 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
74 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
75 "int",
76 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
77 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
78 "gpio",
79 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
80 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
81 "dma",
82 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
83 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
84 "dieid",
85 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
86 "rev",
87 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
550a7375
FB		 88}
89
90#define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
91 | TUSB_PHY_OTG_CTRL_TESTM0)
92
93/*
94 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
95 * Disables power detection in PHY for the duration of idle.
96 */
97static void tusb_wbus_quirk(struct musb *musb, int enabled)
98{
99 void __iomem *tbase = musb->ctrl_base;
100 static u32 phy_otg_ctrl, phy_otg_ena;
101 u32 tmp;
102
103 if (enabled) {
104 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
105 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
106 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
107 | phy_otg_ena | WBUS_QUIRK_MASK;
108 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
109 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
110 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
111 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
5c8a86e1 112 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
550a7375
FB		 113 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
114 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
115 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
116 & TUSB_PHY_OTG_CTRL_TESTM2) {
117 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
118 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
119 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
120 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
5c8a86e1 121 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
550a7375
FB		 122 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
123 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
124 phy_otg_ctrl = 0;
125 phy_otg_ena = 0;
126 }
127}
128
9d506fc6
TL		 129static u32 tusb_fifo_offset(u8 epnum)
130{
131 return 0x200 + (epnum * 0x20);
132}
133
d026e9c7
TL		 134static u32 tusb_ep_offset(u8 epnum, u16 offset)
135{
136 return 0x10 + offset;
137}
138
139/* TUSB mapping: "flat" plus ep0 special cases */
140static void tusb_ep_select(void __iomem *mbase, u8 epnum)
141{
142 musb_writeb(mbase, MUSB_INDEX, epnum);
143}
144
9d506fc6
TL		 145/*
146 * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
147 */
148static u8 tusb_readb(const void __iomem *addr, unsigned offset)
149{
150 u16 tmp;
151 u8 val;
152
153 tmp = __raw_readw(addr + (offset & ~1));
154 if (offset & 1)
155 val = (tmp >> 8);
156 else
157 val = tmp & 0xff;
158
159 return val;
160}
161
162static void tusb_writeb(void __iomem *addr, unsigned offset, u8 data)
163{
164 u16 tmp;
165
166 tmp = __raw_readw(addr + (offset & ~1));
167 if (offset & 1)
168 tmp = (data << 8) | (tmp & 0xff);
169 else
170 tmp = (tmp & 0xff00) | data;
171
172 __raw_writew(tmp, addr + (offset & ~1));
173}
174
550a7375
FB		 175/*
176 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
177 * so both loading and unloading FIFOs need explicit byte counts.
178 */
179
180static inline void
181tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
182{
183 u32 val;
184 int i;
185
186 if (len > 4) {
187 for (i = 0; i < (len >> 2); i++) {
188 memcpy(&val, buf, 4);
189 musb_writel(fifo, 0, val);
190 buf += 4;
191 }
192 len %= 4;
193 }
194 if (len > 0) {
195 /* Write the rest 1 - 3 bytes to FIFO */
196 memcpy(&val, buf, len);
197 musb_writel(fifo, 0, val);
198 }
199}
200
201static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
a156544b 202 void *buf, u16 len)
550a7375
FB		 203{
204 u32 val;
205 int i;
206
207 if (len > 4) {
208 for (i = 0; i < (len >> 2); i++) {
209 val = musb_readl(fifo, 0);
210 memcpy(buf, &val, 4);
211 buf += 4;
212 }
213 len %= 4;
214 }
215 if (len > 0) {
216 /* Read the rest 1 - 3 bytes from FIFO */
217 val = musb_readl(fifo, 0);
218 memcpy(buf, &val, len);
219 }
220}
221
1b40fc57 222static void tusb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
550a7375 223{
28e49705 224 struct musb *musb = hw_ep->musb;
550a7375
FB		 225 void __iomem *ep_conf = hw_ep->conf;
226 void __iomem *fifo = hw_ep->fifo;
227 u8 epnum = hw_ep->epnum;
228
229 prefetch(buf);
230
5c8a86e1 231 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
550a7375
FB		 232 'T', epnum, fifo, len, buf);
233
234 if (epnum)
235 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
236 TUSB_EP_CONFIG_XFR_SIZE(len));
237 else
238 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
239 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) {
56c82cdc 246 iowrite32_rep(fifo, buf, len >> 2);
550a7375
FB		 247 buf += (len & ~0x03);
248 len &= 0x03;
249 }
250 } else {
251 if (len >= 2) {
252 u32 val;
253 int i;
254
255 /* Cannot use writesw, fifo is 32-bit */
256 for (i = 0; i < (len >> 2); i++) {
257 val = (u32)(*(u16 *)buf);
258 buf += 2;
259 val |= (*(u16 *)buf) << 16;
260 buf += 2;
261 musb_writel(fifo, 0, val);
262 }
263 len &= 0x03;
264 }
265 }
266 }
267
268 if (len > 0)
269 tusb_fifo_write_unaligned(fifo, buf, len);
270}
271
1b40fc57 272static void tusb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
550a7375 273{
28e49705 274 struct musb *musb = hw_ep->musb;
550a7375
FB		 275 void __iomem *ep_conf = hw_ep->conf;
276 void __iomem *fifo = hw_ep->fifo;
277 u8 epnum = hw_ep->epnum;
278
5c8a86e1 279 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
550a7375
FB		 280 'R', epnum, fifo, len, buf);
281
282 if (epnum)
283 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
284 TUSB_EP_CONFIG_XFR_SIZE(len));
285 else
286 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
287
288 if (likely((0x01 & (unsigned long) buf) == 0)) {
289
290 /* Best case is 32bit-aligned destination address */
291 if ((0x02 & (unsigned long) buf) == 0) {
292 if (len >= 4) {
56c82cdc 293 ioread32_rep(fifo, buf, len >> 2);
550a7375
FB		 294 buf += (len & ~0x03);
295 len &= 0x03;
296 }
297 } else {
298 if (len >= 2) {
299 u32 val;
300 int i;
301
302 /* Cannot use readsw, fifo is 32-bit */
303 for (i = 0; i < (len >> 2); i++) {
304 val = musb_readl(fifo, 0);
305 *(u16 *)buf = (u16)(val & 0xffff);
306 buf += 2;
307 *(u16 *)buf = (u16)(val >> 16);
308 buf += 2;
309 }
310 len &= 0x03;
311 }
312 }
313 }
314
315 if (len > 0)
316 tusb_fifo_read_unaligned(fifo, buf, len);
317}
318
84e250ff
DB		 319static struct musb *the_musb;
320
550a7375
FB		 321/* This is used by gadget drivers, and OTG transceiver logic, allowing
322 * at most mA current to be drawn from VBUS during a Default-B session
323 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
324 * mode), or low power Default-B sessions, something else supplies power.
325 * Caller must take care of locking.
326 */
86753811 327static int tusb_draw_power(struct usb_phy *x, unsigned mA)
550a7375 328{
84e250ff 329 struct musb *musb = the_musb;
550a7375
FB		 330 void __iomem *tbase = musb->ctrl_base;
331 u32 reg;
332
550a7375
FB		 333 /* tps65030 seems to consume max 100mA, with maybe 60mA available
334 * (measured on one board) for things other than tps and tusb.
335 *
336 * Boards sharing the CPU clock with CLKIN will need to prevent
337 * certain idle sleep states while the USB link is active.
338 *
339 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
340 * The actual current usage would be very board-specific. For now,
341 * it's simpler to just use an aggregate (also board-specific).
342 */
d445b6da 343 if (x->otg->default_a || mA < (musb->min_power << 1))
550a7375
FB		 344 mA = 0;
345
346 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
347 if (mA) {
348 musb->is_bus_powered = 1;
349 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
350 } else {
351 musb->is_bus_powered = 0;
352 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
353 }
354 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
355
5c8a86e1 356 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
550a7375
FB		 357 return 0;
358}
359
550a7375
FB		 360/* workaround for issue 13: change clock during chip idle
361 * (to be fixed in rev3 silicon) ... symptoms include disconnect
362 * or looping suspend/resume cycles
363 */
364static void tusb_set_clock_source(struct musb *musb, unsigned mode)
365{
366 void __iomem *tbase = musb->ctrl_base;
367 u32 reg;
368
369 reg = musb_readl(tbase, TUSB_PRCM_CONF);
370 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
371
372 /* 0 = refclk (clkin, XI)
373 * 1 = PHY 60 MHz (internal PLL)
374 * 2 = not supported
375 * 3 = what?
376 */
377 if (mode > 0)
378 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
379
380 musb_writel(tbase, TUSB_PRCM_CONF, reg);
381
382 /* FIXME tusb6010_platform_retime(mode == 0); */
383}
384
385/*
386 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
387 * Other code ensures that we idle unless we're connected _and_ the
388 * USB link is not suspended ... and tells us the relevant wakeup
389 * events. SW_EN for voltage is handled separately.
390 */
743411b3 391static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
550a7375
FB		 392{
393 void __iomem *tbase = musb->ctrl_base;
394 u32 reg;
395
396 if ((wakeup_enables & TUSB_PRCM_WBUS)
7751b6fb 397 && (musb->tusb_revision == TUSB_REV_30))
550a7375
FB		 398 tusb_wbus_quirk(musb, 1);
399
400 tusb_set_clock_source(musb, 0);
401
402 wakeup_enables |= TUSB_PRCM_WNORCS;
403 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
404
405 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
406 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
407 * Presumably that's mostly to save power, hence WID is immaterial ...
408 */
409
410 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
411 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
412 if (is_host_active(musb)) {
413 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
414 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
415 } else {
416 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
417 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
418 }
419 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
420 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
421
5c8a86e1 422 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
550a7375
FB		 423}
424
425/*
426 * Updates cable VBUS status. Caller must take care of locking.
427 */
743411b3 428static int tusb_musb_vbus_status(struct musb *musb)
550a7375
FB		 429{
430 void __iomem *tbase = musb->ctrl_base;
431 u32 otg_stat, prcm_mngmt;
432 int ret = 0;
433
434 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
435 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
436
437 /* Temporarily enable VBUS detection if it was disabled for
438 * suspend mode. Unless it's enabled otg_stat and devctl will
439 * not show correct VBUS state.
440 */
441 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
442 u32 tmp = prcm_mngmt;
443 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
444 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
445 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
446 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
447 }
448
449 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
450 ret = 1;
451
452 return ret;
453}
454
455static struct timer_list musb_idle_timer;
456
457static void musb_do_idle(unsigned long _musb)
458{
459 struct musb *musb = (void *)_musb;
460 unsigned long flags;
461
462 spin_lock_irqsave(&musb->lock, flags);
463
e47d9254 464 switch (musb->xceiv->otg->state) {
550a7375
FB		 465 case OTG_STATE_A_WAIT_BCON:
466 if ((musb->a_wait_bcon != 0)
467 && (musb->idle_timeout == 0
468 || time_after(jiffies, musb->idle_timeout))) {
5c8a86e1 469 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
e47d9254 470 usb_otg_state_string(musb->xceiv->otg->state));
550a7375
FB		 471 }
472 /* FALLTHROUGH */
473 case OTG_STATE_A_IDLE:
743411b3 474 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 475 default:
476 break;
477 }
478
479 if (!musb->is_active) {
480 u32 wakeups;
481
37ebb549 482 /* wait until hub_wq handles port change status */
550a7375
FB		 483 if (is_host_active(musb) && (musb->port1_status >> 16))
484 goto done;
485
032ec49f 486 if (!musb->gadget_driver) {
550a7375 487 wakeups = 0;
62285963 488 } else {
550a7375 489 wakeups = TUSB_PRCM_WHOSTDISCON
62285963 490 | TUSB_PRCM_WBUS
550a7375 491 | TUSB_PRCM_WVBUS;
032ec49f 492 wakeups |= TUSB_PRCM_WID;
550a7375 493 }
550a7375
FB		 494 tusb_allow_idle(musb, wakeups);
495 }
496done:
497 spin_unlock_irqrestore(&musb->lock, flags);
498}
499
500/*
501 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
502 * like "disconnected" or "suspended". We'll be woken out of it by
503 * connect, resume, or disconnect.
504 *
505 * Needs to be called as the last function everywhere where there is
506 * register access to TUSB6010 because of NOR flash wake-up.
507 * Caller should own controller spinlock.
508 *
509 * Delay because peripheral enables D+ pullup 3msec after SE0, and
510 * we don't want to treat that full speed J as a wakeup event.
511 * ... peripherals must draw only suspend current after 10 msec.
512 */
743411b3 513static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375
FB		 514{
515 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
516 static unsigned long last_timer;
517
518 if (timeout == 0)
519 timeout = default_timeout;
520
521 /* Never idle if active, or when VBUS timeout is not set as host */
522 if (musb->is_active || ((musb->a_wait_bcon == 0)
e47d9254 523 && (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON))) {
5c8a86e1 524 dev_dbg(musb->controller, "%s active, deleting timer\n",
e47d9254 525 usb_otg_state_string(musb->xceiv->otg->state));
550a7375
FB		 526 del_timer(&musb_idle_timer);
527 last_timer = jiffies;
528 return;
529 }
530
531 if (time_after(last_timer, timeout)) {
532 if (!timer_pending(&musb_idle_timer))
533 last_timer = timeout;
534 else {
5c8a86e1 535 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
550a7375
FB		 536 return;
537 }
538 }
539 last_timer = timeout;
540
5c8a86e1 541 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
e47d9254 542 usb_otg_state_string(musb->xceiv->otg->state),
550a7375
FB		 543 (unsigned long)jiffies_to_msecs(timeout - jiffies));
544 mod_timer(&musb_idle_timer, timeout);
545}
546
547/* ticks of 60 MHz clock */
548#define DEVCLOCK 60000000
549#define OTG_TIMER_MS(msecs) ((msecs) \
550 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
551 | TUSB_DEV_OTG_TIMER_ENABLE) \
552 : 0)
553
743411b3 554static void tusb_musb_set_vbus(struct musb *musb, int is_on)
550a7375
FB		 555{
556 void __iomem *tbase = musb->ctrl_base;
557 u32 conf, prcm, timer;
558 u8 devctl;
d445b6da 559 struct usb_otg *otg = musb->xceiv->otg;
550a7375
FB		 560
561 /* HDRC controls CPEN, but beware current surges during device
562 * connect. They can trigger transient overcurrent conditions
563 * that must be ignored.
564 */
565
566 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
567 conf = musb_readl(tbase, TUSB_DEV_CONF);
568 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
569
570 if (is_on) {
550a7375 571 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
d445b6da 572 otg->default_a = 1;
e47d9254 573 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
550a7375
FB		 574 devctl |= MUSB_DEVCTL_SESSION;
575
576 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
577 MUSB_HST_MODE(musb);
578 } else {
579 u32 otg_stat;
580
581 timer = 0;
582
583 /* If ID pin is grounded, we want to be a_idle */
584 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
585 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
e47d9254 586 switch (musb->xceiv->otg->state) {
550a7375
FB		 587 case OTG_STATE_A_WAIT_VRISE:
588 case OTG_STATE_A_WAIT_BCON:
e47d9254 589 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
550a7375
FB		 590 break;
591 case OTG_STATE_A_WAIT_VFALL:
e47d9254 592 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
550a7375
FB		 593 break;
594 default:
e47d9254 595 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
550a7375
FB		 596 }
597 musb->is_active = 0;
d445b6da 598 otg->default_a = 1;
550a7375
FB		 599 MUSB_HST_MODE(musb);
600 } else {
601 musb->is_active = 0;
d445b6da 602 otg->default_a = 0;
e47d9254 603 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
550a7375
FB		 604 MUSB_DEV_MODE(musb);
605 }
606
607 devctl &= ~MUSB_DEVCTL_SESSION;
608 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
550a7375
FB		 609 }
610 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
611
612 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
613 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
614 musb_writel(tbase, TUSB_DEV_CONF, conf);
615 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
616
5c8a86e1 617 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
e47d9254 618 usb_otg_state_string(musb->xceiv->otg->state),
550a7375
FB		 619 musb_readb(musb->mregs, MUSB_DEVCTL),
620 musb_readl(tbase, TUSB_DEV_OTG_STAT),
621 conf, prcm);
622}
623
624/*
625 * Sets the mode to OTG, peripheral or host by changing the ID detection.
626 * Caller must take care of locking.
627 *
628 * Note that if a mini-A cable is plugged in the ID line will stay down as
629 * the weak ID pull-up is not able to pull the ID up.
550a7375 630 */
743411b3 631static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375
FB		 632{
633 void __iomem *tbase = musb->ctrl_base;
634 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
635
550a7375
FB		 636 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
637 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
638 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
639 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
640
641 switch (musb_mode) {
642
550a7375
FB		 643 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
644 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
645 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
646 dev_conf |= TUSB_DEV_CONF_ID_SEL;
647 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
648 break;
550a7375
FB		 649 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
650 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
651 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
652 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
653 break;
550a7375
FB		 654 case MUSB_OTG: /* Use PHY ID detection */
655 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
656 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
657 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
658 break;
550a7375
FB		 659
660 default:
5c8a86e1 661 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
96a274d1 662 return -EINVAL;
550a7375
FB		 663 }
664
665 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
666 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
667 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
668 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
669 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
670
671 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
672 if ((musb_mode == MUSB_PERIPHERAL) &&
673 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
674 INFO("Cannot be peripheral with mini-A cable "
675 "otg_stat: %08x\n", otg_stat);
96a274d1
DB		 676
677 return 0;
550a7375
FB		 678}
679
680static inline unsigned long
681tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
682{
683 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
684 unsigned long idle_timeout = 0;
d445b6da 685 struct usb_otg *otg = musb->xceiv->otg;
550a7375
FB		 686
687 /* ID pin */
688 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
689 int default_a;
690
032ec49f 691 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
5c8a86e1 692 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
d445b6da 693 otg->default_a = default_a;
743411b3 694 tusb_musb_set_vbus(musb, default_a);
550a7375
FB		 695
696 /* Don't allow idling immediately */
697 if (default_a)
698 idle_timeout = jiffies + (HZ * 3);
699 }
700
701 /* VBUS state change */
702 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
703
704 /* B-dev state machine: no vbus ~= disconnect */
032ec49f 705 if (!otg->default_a) {
550a7375
FB		 706 /* ? musb_root_disconnect(musb); */
707 musb->port1_status &=
708 ~(USB_PORT_STAT_CONNECTION
709 | USB_PORT_STAT_ENABLE
710 | USB_PORT_STAT_LOW_SPEED
711 | USB_PORT_STAT_HIGH_SPEED
712 | USB_PORT_STAT_TEST
713 );
550a7375
FB		 714
715 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
5c8a86e1 716 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
e47d9254 717 if (musb->xceiv->otg->state != OTG_STATE_B_IDLE) {
550a7375 718 /* INTR_DISCONNECT can hide... */
e47d9254 719 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
550a7375
FB		 720 musb->int_usb |= MUSB_INTR_DISCONNECT;
721 }
722 musb->is_active = 0;
723 }
5c8a86e1 724 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
e47d9254 725 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
550a7375 726 idle_timeout = jiffies + (1 * HZ);
2bff3916 727 schedule_delayed_work(&musb->irq_work, 0);
550a7375
FB		 728
729 } else /* A-dev state machine */ {
5c8a86e1 730 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
e47d9254 731 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
550a7375 732
e47d9254 733 switch (musb->xceiv->otg->state) {
550a7375 734 case OTG_STATE_A_IDLE:
5c8a86e1 735 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
743411b3 736 musb_platform_set_vbus(musb, 1);
550a7375
FB		 737
738 /* CONNECT can wake if a_wait_bcon is set */
739 if (musb->a_wait_bcon != 0)
740 musb->is_active = 0;
741 else
742 musb->is_active = 1;
743
744 /*
745 * OPT FS A TD.4.6 needs few seconds for
746 * A_WAIT_VRISE
747 */
748 idle_timeout = jiffies + (2 * HZ);
749
750 break;
751 case OTG_STATE_A_WAIT_VRISE:
752 /* ignore; A-session-valid < VBUS_VALID/2,
753 * we monitor this with the timer
754 */
755 break;
756 case OTG_STATE_A_WAIT_VFALL:
757 /* REVISIT this irq triggers during short
758 * spikes caused by enumeration ...
759 */
760 if (musb->vbuserr_retry) {
761 musb->vbuserr_retry--;
743411b3 762 tusb_musb_set_vbus(musb, 1);
550a7375
FB		 763 } else {
764 musb->vbuserr_retry
765 = VBUSERR_RETRY_COUNT;
743411b3 766 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 767 }
768 break;
769 default:
770 break;
771 }
772 }
773 }
774
775 /* OTG timer expiration */
776 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
777 u8 devctl;
778
5c8a86e1 779 dev_dbg(musb->controller, "%s timer, %03x\n",
e47d9254 780 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
550a7375 781
e47d9254 782 switch (musb->xceiv->otg->state) {
550a7375
FB		 783 case OTG_STATE_A_WAIT_VRISE:
784 /* VBUS has probably been valid for a while now,
785 * but may well have bounced out of range a bit
786 */
787 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
788 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
789 if ((devctl & MUSB_DEVCTL_VBUS)
790 != MUSB_DEVCTL_VBUS) {
5c8a86e1 791 dev_dbg(musb->controller, "devctl %02x\n", devctl);
550a7375
FB		 792 break;
793 }
e47d9254 794 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
550a7375
FB		 795 musb->is_active = 0;
796 idle_timeout = jiffies
797 + msecs_to_jiffies(musb->a_wait_bcon);
798 } else {
799 /* REVISIT report overcurrent to hub? */
800 ERR("vbus too slow, devctl %02x\n", devctl);
743411b3 801 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 802 }
803 break;
804 case OTG_STATE_A_WAIT_BCON:
805 if (musb->a_wait_bcon != 0)
806 idle_timeout = jiffies
807 + msecs_to_jiffies(musb->a_wait_bcon);
808 break;
809 case OTG_STATE_A_SUSPEND:
810 break;
811 case OTG_STATE_B_WAIT_ACON:
812 break;
813 default:
814 break;
815 }
816 }
2bff3916 817 schedule_delayed_work(&musb->irq_work, 0);
550a7375
FB		 818
819 return idle_timeout;
820}
821
743411b3 822static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
550a7375
FB		 823{
824 struct musb *musb = __hci;
825 void __iomem *tbase = musb->ctrl_base;
826 unsigned long flags, idle_timeout = 0;
827 u32 int_mask, int_src;
828
829 spin_lock_irqsave(&musb->lock, flags);
830
831 /* Mask all interrupts to allow using both edge and level GPIO irq */
832 int_mask = musb_readl(tbase, TUSB_INT_MASK);
833 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
834
835 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
5c8a86e1 836 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
550a7375
FB		 837
838 musb->int_usb = (u8) int_src;
839
840 /* Acknowledge wake-up source interrupts */
841 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
842 u32 reg;
843 u32 i;
844
7751b6fb 845 if (musb->tusb_revision == TUSB_REV_30)
550a7375
FB		 846 tusb_wbus_quirk(musb, 0);
847
848 /* there are issues re-locking the PLL on wakeup ... */
849
850 /* work around issue 8 */
851 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
852 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
853 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
854 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
855 if (reg == i)
856 break;
5c8a86e1 857 dev_dbg(musb->controller, "TUSB NOR not ready\n");
550a7375
FB		 858 }
859
860 /* work around issue 13 (2nd half) */
861 tusb_set_clock_source(musb, 1);
862
863 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
864 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
865 if (reg & ~TUSB_PRCM_WNORCS) {
866 musb->is_active = 1;
2bff3916 867 schedule_delayed_work(&musb->irq_work, 0);
550a7375 868 }
5c8a86e1 869 dev_dbg(musb->controller, "wake %sactive %02x\n",
550a7375
FB		 870 musb->is_active ? "" : "in", reg);
871
872 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
873 }
874
875 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
876 del_timer(&musb_idle_timer);
877
878 /* OTG state change reports (annoyingly) not issued by Mentor core */
879 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
880 | TUSB_INT_SRC_OTG_TIMEOUT
881 | TUSB_INT_SRC_ID_STATUS_CHNG))
882 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
883
47699b0a
PU		 884 /*
885 * Just clear the DMA interrupt if it comes as the completion for both
886 * TX and RX is handled by the DMA callback in tusb6010_omap
550a7375
FB		 887 */
888 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
889 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
550a7375 890
5c8a86e1 891 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
550a7375
FB		 892 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
893 }
894
895 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
896 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
897 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
898
899 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
900 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
901 musb->int_tx = (musb_src & 0xffff);
902 } else {
903 musb->int_rx = 0;
904 musb->int_tx = 0;
905 }
906
907 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
908 musb_interrupt(musb);
909
910 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
911 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
912 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
913
743411b3 914 tusb_musb_try_idle(musb, idle_timeout);
550a7375
FB		 915
916 musb_writel(tbase, TUSB_INT_MASK, int_mask);
917 spin_unlock_irqrestore(&musb->lock, flags);
918
919 return IRQ_HANDLED;
920}
921
922static int dma_off;
923
924/*
925 * Enables TUSB6010. Caller must take care of locking.
926 * REVISIT:
927 * - Check what is unnecessary in MGC_HdrcStart()
928 */
743411b3 929static void tusb_musb_enable(struct musb *musb)
550a7375
FB		 930{
931 void __iomem *tbase = musb->ctrl_base;
932
933 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
934 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
935 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
936
937 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
938 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
939 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
940 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
941
942 /* Clear all subsystem interrups */
943 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
944 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
945 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
946
947 /* Acknowledge pending interrupt(s) */
948 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
949
950 /* Only 0 clock cycles for minimum interrupt de-assertion time and
951 * interrupt polarity active low seems to work reliably here */
952 musb_writel(tbase, TUSB_INT_CTRL_CONF,
953 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
954
dced35ae 955 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
550a7375
FB		 956
957 /* maybe force into the Default-A OTG state machine */
958 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
959 & TUSB_DEV_OTG_STAT_ID_STATUS))
960 musb_writel(tbase, TUSB_INT_SRC_SET,
961 TUSB_INT_SRC_ID_STATUS_CHNG);
962
963 if (is_dma_capable() && dma_off)
964 printk(KERN_WARNING "%s %s: dma not reactivated\n",
965 __FILE__, __func__);
966 else
967 dma_off = 1;
968}
969
970/*
971 * Disables TUSB6010. Caller must take care of locking.
972 */
743411b3 973static void tusb_musb_disable(struct musb *musb)
550a7375
FB		 974{
975 void __iomem *tbase = musb->ctrl_base;
976
977 /* FIXME stop DMA, IRQs, timers, ... */
978
979 /* disable all IRQs */
980 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
981 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
982 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
983 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
984
985 del_timer(&musb_idle_timer);
986
987 if (is_dma_capable() && !dma_off) {
988 printk(KERN_WARNING "%s %s: dma still active\n",
989 __FILE__, __func__);
990 dma_off = 1;
991 }
992}
993
994/*
995 * Sets up TUSB6010 CPU interface specific signals and registers
996 * Note: Settings optimized for OMAP24xx
997 */
743411b3 998static void tusb_setup_cpu_interface(struct musb *musb)
550a7375
FB		 999{
1000 void __iomem *tbase = musb->ctrl_base;
1001
1002 /*
1003 * Disable GPIO[5:0] pullups (used as output DMA requests)
1004 * Don't disable GPIO[7:6] as they are needed for wake-up.
1005 */
1006 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
1007
1008 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
1009 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
1010
1011 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
1012 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
1013
1014 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
1015 * de-assertion time 2 system clocks p 62 */
1016 musb_writel(tbase, TUSB_DMA_REQ_CONF,
1017 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
1018 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
1019 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
1020
1021 /* Set 0 wait count for synchronous burst access */
1022 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
1023}
1024
743411b3 1025static int tusb_musb_start(struct musb *musb)
550a7375
FB		 1026{
1027 void __iomem *tbase = musb->ctrl_base;
1028 int ret = 0;
1029 unsigned long flags;
1030 u32 reg;
1031
1032 if (musb->board_set_power)
1033 ret = musb->board_set_power(1);
1034 if (ret != 0) {
1035 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1036 return ret;
1037 }
1038
1039 spin_lock_irqsave(&musb->lock, flags);
1040
1041 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1042 TUSB_PROD_TEST_RESET_VAL) {
1043 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1044 goto err;
1045 }
1046
8c240dc1 1047 musb->tusb_revision = tusb_get_revision(musb);
7751b6fb
MK		 1048 tusb_print_revision(musb);
1049 if (musb->tusb_revision < 2) {
550a7375 1050 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
7751b6fb 1051 musb->tusb_revision);
550a7375
FB		 1052 goto err;
1053 }
1054
1055 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1056 * NOR FLASH interface is used */
1057 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1058
1059 /* Select PHY free running 60MHz as a system clock */
1060 tusb_set_clock_source(musb, 1);
1061
1062 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1063 * power saving, enable VBus detect and session end comparators,
1064 * enable IDpullup, enable VBus charging */
1065 musb_writel(tbase, TUSB_PRCM_MNGMT,
1066 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1067 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1068 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1069 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1070 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1071 tusb_setup_cpu_interface(musb);
1072
1073 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1074 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1075 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1076 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1077
1078 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1079 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1080 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1081
1082 spin_unlock_irqrestore(&musb->lock, flags);
1083
1084 return 0;
1085
1086err:
1087 spin_unlock_irqrestore(&musb->lock, flags);
1088
1089 if (musb->board_set_power)
1090 musb->board_set_power(0);
1091
1092 return -ENODEV;
1093}
1094
743411b3 1095static int tusb_musb_init(struct musb *musb)
550a7375
FB		 1096{
1097 struct platform_device *pdev;
1098 struct resource *mem;
84e250ff 1099 void __iomem *sync = NULL;
550a7375
FB		 1100 int ret;
1101
662dca54 1102 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee 1103 if (IS_ERR_OR_NULL(musb->xceiv))
25736e0c 1104 return -EPROBE_DEFER;
84e250ff 1105
550a7375
FB		 1106 pdev = to_platform_device(musb->controller);
1107
1108 /* dma address for async dma */
1109 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1110 musb->async = mem->start;
1111
1112 /* dma address for sync dma */
1113 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1114 if (!mem) {
1115 pr_debug("no sync dma resource?\n");
84e250ff
DB		 1116 ret = -ENODEV;
1117 goto done;
550a7375
FB		 1118 }
1119 musb->sync = mem->start;
1120
3d268645 1121 sync = ioremap(mem->start, resource_size(mem));
550a7375
FB		 1122 if (!sync) {
1123 pr_debug("ioremap for sync failed\n");
84e250ff
DB		 1124 ret = -ENOMEM;
1125 goto done;
550a7375
FB		 1126 }
1127 musb->sync_va = sync;
1128
1129 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1130 * FIFOs at 0x600, TUSB at 0x800
1131 */
1132 musb->mregs += TUSB_BASE_OFFSET;
1133
743411b3 1134 ret = tusb_musb_start(musb);
550a7375
FB		 1135 if (ret) {
1136 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1137 ret);
84e250ff 1138 goto done;
550a7375 1139 }
743411b3 1140 musb->isr = tusb_musb_interrupt;
550a7375 1141
032ec49f
FB		 1142 musb->xceiv->set_power = tusb_draw_power;
1143 the_musb = musb;
550a7375
FB		 1144
1145 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1146
84e250ff
DB		 1147done:
1148 if (ret < 0) {
1149 if (sync)
1150 iounmap(sync);
f4053874 1151
721002ec 1152 usb_put_phy(musb->xceiv);
84e250ff 1153 }
550a7375
FB		 1154 return ret;
1155}
1156
743411b3 1157static int tusb_musb_exit(struct musb *musb)
550a7375
FB		 1158{
1159 del_timer_sync(&musb_idle_timer);
84e250ff 1160 the_musb = NULL;
550a7375
FB		 1161
1162 if (musb->board_set_power)
1163 musb->board_set_power(0);
1164
1165 iounmap(musb->sync_va);
f4053874 1166
721002ec 1167 usb_put_phy(musb->xceiv);
550a7375
FB		 1168 return 0;
1169}
743411b3 1170
f7ec9437 1171static const struct musb_platform_ops tusb_ops = {
0efc1356
PU		 1172 .quirks = MUSB_DMA_TUSB_OMAP | MUSB_IN_TUSB |
1173 MUSB_G_NO_SKB_RESERVE,
743411b3
FB		 1174 .init = tusb_musb_init,
1175 .exit = tusb_musb_exit,
1176
d026e9c7
TL		 1177 .ep_offset = tusb_ep_offset,
1178 .ep_select = tusb_ep_select,
9d506fc6
TL		 1179 .fifo_offset = tusb_fifo_offset,
1180 .readb = tusb_readb,
1181 .writeb = tusb_writeb,
1b40fc57
TL		 1182 .read_fifo = tusb_read_fifo,
1183 .write_fifo = tusb_write_fifo,
7f6283ed
TL		 1184#ifdef CONFIG_USB_TUSB_OMAP_DMA
1185 .dma_init = tusb_dma_controller_create,
1186 .dma_exit = tusb_dma_controller_destroy,
1187#endif
743411b3
FB		 1188 .enable = tusb_musb_enable,
1189 .disable = tusb_musb_disable,
1190
1191 .set_mode = tusb_musb_set_mode,
1192 .try_idle = tusb_musb_try_idle,
1193
1194 .vbus_status = tusb_musb_vbus_status,
1195 .set_vbus = tusb_musb_set_vbus,
1196};
18688fbe 1197
af384875
RK		 1198static const struct platform_device_info tusb_dev_info = {
1199 .name = "musb-hdrc",
1200 .id = PLATFORM_DEVID_AUTO,
1201 .dma_mask = DMA_BIT_MASK(32),
1202};
18688fbe 1203
41ac7b3a 1204static int tusb_probe(struct platform_device *pdev)
18688fbe 1205{
c1f01be4 1206 struct resource musb_resources[3];
c1a7d67c 1207 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
18688fbe 1208 struct platform_device *musb;
1add75d2 1209 struct tusb6010_glue *glue;
af384875 1210 struct platform_device_info pinfo;
cdfe35fb 1211 int ret;
18688fbe 1212
cdfe35fb 1213 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
6a58856f 1214 if (!glue)
cdfe35fb 1215 return -ENOMEM;
1add75d2 1216
1add75d2 1217 glue->dev = &pdev->dev;
1add75d2 1218
f7ec9437
FB		 1219 pdata->platform_ops = &tusb_ops;
1220
e741e637 1221 usb_phy_generic_register();
1add75d2 1222 platform_set_drvdata(pdev, glue);
18688fbe 1223
09fc7d22
FB		 1224 memset(musb_resources, 0x00, sizeof(*musb_resources) *
1225 ARRAY_SIZE(musb_resources));
1226
1227 musb_resources[0].name = pdev->resource[0].name;
1228 musb_resources[0].start = pdev->resource[0].start;
1229 musb_resources[0].end = pdev->resource[0].end;
1230 musb_resources[0].flags = pdev->resource[0].flags;
1231
1232 musb_resources[1].name = pdev->resource[1].name;
1233 musb_resources[1].start = pdev->resource[1].start;
1234 musb_resources[1].end = pdev->resource[1].end;
1235 musb_resources[1].flags = pdev->resource[1].flags;
1236
c1f01be4
KVA		 1237 musb_resources[2].name = pdev->resource[2].name;
1238 musb_resources[2].start = pdev->resource[2].start;
1239 musb_resources[2].end = pdev->resource[2].end;
1240 musb_resources[2].flags = pdev->resource[2].flags;
1241
af384875
RK		 1242 pinfo = tusb_dev_info;
1243 pinfo.parent = &pdev->dev;
1244 pinfo.res = musb_resources;
1245 pinfo.num_res = ARRAY_SIZE(musb_resources);
1246 pinfo.data = pdata;
1247 pinfo.size_data = sizeof(*pdata);
1248
1249 glue->musb = musb = platform_device_register_full(&pinfo);
1250 if (IS_ERR(musb)) {
1251 ret = PTR_ERR(musb);
1252 dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
cdfe35fb 1253 return ret;
18688fbe
FB		 1254 }
1255
1256 return 0;
18688fbe
FB		 1257}
1258
fb4e98ab 1259static int tusb_remove(struct platform_device *pdev)
18688fbe 1260{
1add75d2 1261 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
18688fbe 1262
a81a01f9 1263 platform_device_unregister(glue->musb);
2f36ff69 1264 usb_phy_generic_unregister(glue->phy);
18688fbe
FB		 1265
1266 return 0;
1267}
1268
1269static struct platform_driver tusb_driver = {
e9e8c85e 1270 .probe = tusb_probe,
7690417d 1271 .remove = tusb_remove,
18688fbe
FB		 1272 .driver = {
1273 .name = "musb-tusb",
1274 },
1275};
1276
1277MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1278MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1279MODULE_LICENSE("GPL v2");
01380c08 1280module_platform_driver(tusb_driver);
Linux 6.x block layer and io_uring tree(s)