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[linux-block.git] / drivers / usb / musb / tusb6010.c
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5fd54ace 1// SPDX-License-Identifier: GPL-2.0
550a7375
FB		 2/*
3 * TUSB6010 USB 2.0 OTG Dual Role controller
4 *
5 * Copyright (C) 2006 Nokia Corporation
550a7375 6 * Tony Lindgren <tony@atomide.com>
550a7375
FB		 7 *
8 * Notes:
9 * - Driver assumes that interface to external host (main CPU) is
10 * configured for NOR FLASH interface instead of VLYNQ serial
11 * interface.
12 */
13
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/errno.h>
ded017ee 17#include <linux/err.h>
240a16e2 18#include <linux/prefetch.h>
550a7375
FB		 19#include <linux/usb.h>
20#include <linux/irq.h>
56c82cdc 21#include <linux/io.h>
cdfe35fb 22#include <linux/device.h>
550a7375 23#include <linux/platform_device.h>
18688fbe 24#include <linux/dma-mapping.h>
d7078df6 25#include <linux/usb/usb_phy_generic.h>
550a7375
FB		 26
27#include "musb_core.h"
28
1add75d2
FB		 29struct tusb6010_glue {
30 struct device *dev;
31 struct platform_device *musb;
2f36ff69 32 struct platform_device *phy;
1add75d2
FB		 33};
34
743411b3 35static void tusb_musb_set_vbus(struct musb *musb, int is_on);
550a7375
FB		 36
37#define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
38#define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
39
40/*
41 * Checks the revision. We need to use the DMA register as 3.0 does not
42 * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
43 */
7751b6fb 44static u8 tusb_get_revision(struct musb *musb)
550a7375
FB		 45{
46 void __iomem *tbase = musb->ctrl_base;
47 u32 die_id;
48 u8 rev;
49
50 rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
51 if (TUSB_REV_MAJOR(rev) == 3) {
52 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
53 TUSB_DIDR1_HI));
54 if (die_id >= TUSB_DIDR1_HI_REV_31)
55 rev |= 1;
56 }
57
58 return rev;
59}
60
7751b6fb 61static void tusb_print_revision(struct musb *musb)
550a7375
FB		 62{
63 void __iomem *tbase = musb->ctrl_base;
64 u8 rev;
65
7751b6fb 66 rev = musb->tusb_revision;
550a7375
FB		 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));
550a7375
FB		 85}
86
87#define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
88 | TUSB_PHY_OTG_CTRL_TESTM0)
89
90/*
91 * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
92 * Disables power detection in PHY for the duration of idle.
93 */
94static void tusb_wbus_quirk(struct musb *musb, int enabled)
95{
96 void __iomem *tbase = musb->ctrl_base;
97 static u32 phy_otg_ctrl, phy_otg_ena;
98 u32 tmp;
99
100 if (enabled) {
101 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
102 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
103 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
104 | phy_otg_ena | WBUS_QUIRK_MASK;
105 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
106 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
107 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
108 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
5c8a86e1 109 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
550a7375
FB		 110 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
111 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
112 } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
113 & TUSB_PHY_OTG_CTRL_TESTM2) {
114 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
115 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
116 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
117 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
5c8a86e1 118 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
550a7375
FB		 119 musb_readl(tbase, TUSB_PHY_OTG_CTRL),
120 musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
121 phy_otg_ctrl = 0;
122 phy_otg_ena = 0;
123 }
124}
125
9d506fc6
TL		 126static u32 tusb_fifo_offset(u8 epnum)
127{
128 return 0x200 + (epnum * 0x20);
129}
130
d026e9c7
TL		 131static u32 tusb_ep_offset(u8 epnum, u16 offset)
132{
133 return 0x10 + offset;
134}
135
136/* TUSB mapping: "flat" plus ep0 special cases */
137static void tusb_ep_select(void __iomem *mbase, u8 epnum)
138{
139 musb_writeb(mbase, MUSB_INDEX, epnum);
140}
141
9d506fc6
TL		 142/*
143 * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
144 */
9c93d7fd 145static u8 tusb_readb(void __iomem *addr, u32 offset)
9d506fc6
TL		 146{
147 u16 tmp;
148 u8 val;
149
150 tmp = __raw_readw(addr + (offset & ~1));
151 if (offset & 1)
152 val = (tmp >> 8);
153 else
154 val = tmp & 0xff;
155
156 return val;
157}
158
1e1769da 159static void tusb_writeb(void __iomem *addr, u32 offset, u8 data)
9d506fc6
TL		 160{
161 u16 tmp;
162
163 tmp = __raw_readw(addr + (offset & ~1));
164 if (offset & 1)
165 tmp = (data << 8) | (tmp & 0xff);
166 else
167 tmp = (tmp & 0xff00) | data;
168
169 __raw_writew(tmp, addr + (offset & ~1));
170}
171
550a7375
FB		 172/*
173 * TUSB 6010 may use a parallel bus that doesn't support byte ops;
174 * so both loading and unloading FIFOs need explicit byte counts.
175 */
176
177static inline void
178tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
179{
180 u32 val;
181 int i;
182
183 if (len > 4) {
184 for (i = 0; i < (len >> 2); i++) {
185 memcpy(&val, buf, 4);
186 musb_writel(fifo, 0, val);
187 buf += 4;
188 }
189 len %= 4;
190 }
191 if (len > 0) {
192 /* Write the rest 1 - 3 bytes to FIFO */
193 memcpy(&val, buf, len);
194 musb_writel(fifo, 0, val);
195 }
196}
197
198static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
a156544b 199 void *buf, u16 len)
550a7375
FB		 200{
201 u32 val;
202 int i;
203
204 if (len > 4) {
205 for (i = 0; i < (len >> 2); i++) {
206 val = musb_readl(fifo, 0);
207 memcpy(buf, &val, 4);
208 buf += 4;
209 }
210 len %= 4;
211 }
212 if (len > 0) {
213 /* Read the rest 1 - 3 bytes from FIFO */
214 val = musb_readl(fifo, 0);
215 memcpy(buf, &val, len);
216 }
217}
218
1b40fc57 219static void tusb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
550a7375 220{
28e49705 221 struct musb *musb = hw_ep->musb;
550a7375
FB		 222 void __iomem *ep_conf = hw_ep->conf;
223 void __iomem *fifo = hw_ep->fifo;
224 u8 epnum = hw_ep->epnum;
225
226 prefetch(buf);
227
5c8a86e1 228 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
550a7375
FB		 229 'T', epnum, fifo, len, buf);
230
231 if (epnum)
232 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
233 TUSB_EP_CONFIG_XFR_SIZE(len));
234 else
235 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
236 TUSB_EP0_CONFIG_XFR_SIZE(len));
237
238 if (likely((0x01 & (unsigned long) buf) == 0)) {
239
240 /* Best case is 32bit-aligned destination address */
241 if ((0x02 & (unsigned long) buf) == 0) {
242 if (len >= 4) {
56c82cdc 243 iowrite32_rep(fifo, buf, len >> 2);
550a7375
FB		 244 buf += (len & ~0x03);
245 len &= 0x03;
246 }
247 } else {
248 if (len >= 2) {
249 u32 val;
250 int i;
251
252 /* Cannot use writesw, fifo is 32-bit */
253 for (i = 0; i < (len >> 2); i++) {
254 val = (u32)(*(u16 *)buf);
255 buf += 2;
256 val |= (*(u16 *)buf) << 16;
257 buf += 2;
258 musb_writel(fifo, 0, val);
259 }
260 len &= 0x03;
261 }
262 }
263 }
264
265 if (len > 0)
266 tusb_fifo_write_unaligned(fifo, buf, len);
267}
268
1b40fc57 269static void tusb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
550a7375 270{
28e49705 271 struct musb *musb = hw_ep->musb;
550a7375
FB		 272 void __iomem *ep_conf = hw_ep->conf;
273 void __iomem *fifo = hw_ep->fifo;
274 u8 epnum = hw_ep->epnum;
275
5c8a86e1 276 dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
550a7375
FB		 277 'R', epnum, fifo, len, buf);
278
279 if (epnum)
280 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
281 TUSB_EP_CONFIG_XFR_SIZE(len));
282 else
283 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
284
285 if (likely((0x01 & (unsigned long) buf) == 0)) {
286
287 /* Best case is 32bit-aligned destination address */
288 if ((0x02 & (unsigned long) buf) == 0) {
289 if (len >= 4) {
56c82cdc 290 ioread32_rep(fifo, buf, len >> 2);
550a7375
FB		 291 buf += (len & ~0x03);
292 len &= 0x03;
293 }
294 } else {
295 if (len >= 2) {
296 u32 val;
297 int i;
298
299 /* Cannot use readsw, fifo is 32-bit */
300 for (i = 0; i < (len >> 2); i++) {
301 val = musb_readl(fifo, 0);
302 *(u16 *)buf = (u16)(val & 0xffff);
303 buf += 2;
304 *(u16 *)buf = (u16)(val >> 16);
305 buf += 2;
306 }
307 len &= 0x03;
308 }
309 }
310 }
311
312 if (len > 0)
313 tusb_fifo_read_unaligned(fifo, buf, len);
314}
315
84e250ff
DB		 316static struct musb *the_musb;
317
550a7375
FB		 318/* This is used by gadget drivers, and OTG transceiver logic, allowing
319 * at most mA current to be drawn from VBUS during a Default-B session
320 * (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
321 * mode), or low power Default-B sessions, something else supplies power.
322 * Caller must take care of locking.
323 */
86753811 324static int tusb_draw_power(struct usb_phy *x, unsigned mA)
550a7375 325{
84e250ff 326 struct musb *musb = the_musb;
550a7375
FB		 327 void __iomem *tbase = musb->ctrl_base;
328 u32 reg;
329
550a7375
FB		 330 /* tps65030 seems to consume max 100mA, with maybe 60mA available
331 * (measured on one board) for things other than tps and tusb.
332 *
333 * Boards sharing the CPU clock with CLKIN will need to prevent
334 * certain idle sleep states while the USB link is active.
335 *
336 * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
337 * The actual current usage would be very board-specific. For now,
338 * it's simpler to just use an aggregate (also board-specific).
339 */
d445b6da 340 if (x->otg->default_a || mA < (musb->min_power << 1))
550a7375
FB		 341 mA = 0;
342
343 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
344 if (mA) {
345 musb->is_bus_powered = 1;
346 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
347 } else {
348 musb->is_bus_powered = 0;
349 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
350 }
351 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
352
5c8a86e1 353 dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
550a7375
FB		 354 return 0;
355}
356
550a7375
FB		 357/* workaround for issue 13: change clock during chip idle
358 * (to be fixed in rev3 silicon) ... symptoms include disconnect
359 * or looping suspend/resume cycles
360 */
361static void tusb_set_clock_source(struct musb *musb, unsigned mode)
362{
363 void __iomem *tbase = musb->ctrl_base;
364 u32 reg;
365
366 reg = musb_readl(tbase, TUSB_PRCM_CONF);
367 reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
368
369 /* 0 = refclk (clkin, XI)
370 * 1 = PHY 60 MHz (internal PLL)
371 * 2 = not supported
372 * 3 = what?
373 */
374 if (mode > 0)
375 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
376
377 musb_writel(tbase, TUSB_PRCM_CONF, reg);
378
379 /* FIXME tusb6010_platform_retime(mode == 0); */
380}
381
382/*
383 * Idle TUSB6010 until next wake-up event; NOR access always wakes.
384 * Other code ensures that we idle unless we're connected _and_ the
385 * USB link is not suspended ... and tells us the relevant wakeup
386 * events. SW_EN for voltage is handled separately.
387 */
743411b3 388static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
550a7375
FB		 389{
390 void __iomem *tbase = musb->ctrl_base;
391 u32 reg;
392
393 if ((wakeup_enables & TUSB_PRCM_WBUS)
7751b6fb 394 && (musb->tusb_revision == TUSB_REV_30))
550a7375
FB		 395 tusb_wbus_quirk(musb, 1);
396
397 tusb_set_clock_source(musb, 0);
398
399 wakeup_enables |= TUSB_PRCM_WNORCS;
400 musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
401
402 /* REVISIT writeup of WID implies that if WID set and ID is grounded,
403 * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
404 * Presumably that's mostly to save power, hence WID is immaterial ...
405 */
406
407 reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
408 /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
409 if (is_host_active(musb)) {
410 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
411 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
412 } else {
413 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
414 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
415 }
416 reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
417 musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
418
5c8a86e1 419 dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
550a7375
FB		 420}
421
422/*
423 * Updates cable VBUS status. Caller must take care of locking.
424 */
743411b3 425static int tusb_musb_vbus_status(struct musb *musb)
550a7375
FB		 426{
427 void __iomem *tbase = musb->ctrl_base;
428 u32 otg_stat, prcm_mngmt;
429 int ret = 0;
430
431 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
432 prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
433
434 /* Temporarily enable VBUS detection if it was disabled for
435 * suspend mode. Unless it's enabled otg_stat and devctl will
436 * not show correct VBUS state.
437 */
438 if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
439 u32 tmp = prcm_mngmt;
440 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
441 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
442 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
443 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
444 }
445
446 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
447 ret = 1;
448
449 return ret;
450}
451
05678497 452static void musb_do_idle(struct timer_list *t)
550a7375 453{
05678497 454 struct musb *musb = from_timer(musb, t, dev_timer);
550a7375
FB		 455 unsigned long flags;
456
457 spin_lock_irqsave(&musb->lock, flags);
458
e47d9254 459 switch (musb->xceiv->otg->state) {
550a7375
FB		 460 case OTG_STATE_A_WAIT_BCON:
461 if ((musb->a_wait_bcon != 0)
462 && (musb->idle_timeout == 0
463 || time_after(jiffies, musb->idle_timeout))) {
5c8a86e1 464 dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
e47d9254 465 usb_otg_state_string(musb->xceiv->otg->state));
550a7375 466 }
df561f66 467 fallthrough;
550a7375 468 case OTG_STATE_A_IDLE:
743411b3 469 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 470 default:
471 break;
472 }
473
474 if (!musb->is_active) {
475 u32 wakeups;
476
37ebb549 477 /* wait until hub_wq handles port change status */
550a7375
FB		 478 if (is_host_active(musb) && (musb->port1_status >> 16))
479 goto done;
480
032ec49f 481 if (!musb->gadget_driver) {
550a7375 482 wakeups = 0;
62285963 483 } else {
550a7375 484 wakeups = TUSB_PRCM_WHOSTDISCON
62285963 485 | TUSB_PRCM_WBUS
550a7375 486 | TUSB_PRCM_WVBUS;
032ec49f 487 wakeups |= TUSB_PRCM_WID;
550a7375 488 }
550a7375
FB		 489 tusb_allow_idle(musb, wakeups);
490 }
491done:
492 spin_unlock_irqrestore(&musb->lock, flags);
493}
494
495/*
496 * Maybe put TUSB6010 into idle mode mode depending on USB link status,
497 * like "disconnected" or "suspended". We'll be woken out of it by
498 * connect, resume, or disconnect.
499 *
500 * Needs to be called as the last function everywhere where there is
501 * register access to TUSB6010 because of NOR flash wake-up.
502 * Caller should own controller spinlock.
503 *
504 * Delay because peripheral enables D+ pullup 3msec after SE0, and
505 * we don't want to treat that full speed J as a wakeup event.
506 * ... peripherals must draw only suspend current after 10 msec.
507 */
743411b3 508static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375
FB		 509{
510 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
511 static unsigned long last_timer;
512
513 if (timeout == 0)
514 timeout = default_timeout;
515
516 /* Never idle if active, or when VBUS timeout is not set as host */
517 if (musb->is_active || ((musb->a_wait_bcon == 0)
e47d9254 518 && (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON))) {
5c8a86e1 519 dev_dbg(musb->controller, "%s active, deleting timer\n",
e47d9254 520 usb_otg_state_string(musb->xceiv->otg->state));
05678497 521 del_timer(&musb->dev_timer);
550a7375
FB		 522 last_timer = jiffies;
523 return;
524 }
525
526 if (time_after(last_timer, timeout)) {
05678497 527 if (!timer_pending(&musb->dev_timer))
550a7375
FB		 528 last_timer = timeout;
529 else {
5c8a86e1 530 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
550a7375
FB		 531 return;
532 }
533 }
534 last_timer = timeout;
535
5c8a86e1 536 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
e47d9254 537 usb_otg_state_string(musb->xceiv->otg->state),
550a7375 538 (unsigned long)jiffies_to_msecs(timeout - jiffies));
05678497 539 mod_timer(&musb->dev_timer, timeout);
550a7375
FB		 540}
541
542/* ticks of 60 MHz clock */
543#define DEVCLOCK 60000000
544#define OTG_TIMER_MS(msecs) ((msecs) \
545 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
546 | TUSB_DEV_OTG_TIMER_ENABLE) \
547 : 0)
548
743411b3 549static void tusb_musb_set_vbus(struct musb *musb, int is_on)
550a7375
FB		 550{
551 void __iomem *tbase = musb->ctrl_base;
552 u32 conf, prcm, timer;
553 u8 devctl;
d445b6da 554 struct usb_otg *otg = musb->xceiv->otg;
550a7375
FB		 555
556 /* HDRC controls CPEN, but beware current surges during device
557 * connect. They can trigger transient overcurrent conditions
558 * that must be ignored.
559 */
560
561 prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
562 conf = musb_readl(tbase, TUSB_DEV_CONF);
563 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
564
565 if (is_on) {
550a7375 566 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
d445b6da 567 otg->default_a = 1;
e47d9254 568 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
550a7375
FB		 569 devctl |= MUSB_DEVCTL_SESSION;
570
571 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
572 MUSB_HST_MODE(musb);
573 } else {
574 u32 otg_stat;
575
576 timer = 0;
577
578 /* If ID pin is grounded, we want to be a_idle */
579 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
580 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
e47d9254 581 switch (musb->xceiv->otg->state) {
550a7375
FB		 582 case OTG_STATE_A_WAIT_VRISE:
583 case OTG_STATE_A_WAIT_BCON:
e47d9254 584 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
550a7375
FB		 585 break;
586 case OTG_STATE_A_WAIT_VFALL:
e47d9254 587 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
550a7375
FB		 588 break;
589 default:
e47d9254 590 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
550a7375
FB		 591 }
592 musb->is_active = 0;
d445b6da 593 otg->default_a = 1;
550a7375
FB		 594 MUSB_HST_MODE(musb);
595 } else {
596 musb->is_active = 0;
d445b6da 597 otg->default_a = 0;
e47d9254 598 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
550a7375
FB		 599 MUSB_DEV_MODE(musb);
600 }
601
602 devctl &= ~MUSB_DEVCTL_SESSION;
603 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
550a7375
FB		 604 }
605 prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
606
607 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
608 musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
609 musb_writel(tbase, TUSB_DEV_CONF, conf);
610 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
611
5c8a86e1 612 dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
e47d9254 613 usb_otg_state_string(musb->xceiv->otg->state),
550a7375
FB		 614 musb_readb(musb->mregs, MUSB_DEVCTL),
615 musb_readl(tbase, TUSB_DEV_OTG_STAT),
616 conf, prcm);
617}
618
619/*
620 * Sets the mode to OTG, peripheral or host by changing the ID detection.
621 * Caller must take care of locking.
622 *
623 * Note that if a mini-A cable is plugged in the ID line will stay down as
624 * the weak ID pull-up is not able to pull the ID up.
550a7375 625 */
743411b3 626static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375
FB		 627{
628 void __iomem *tbase = musb->ctrl_base;
629 u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
630
550a7375
FB		 631 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
632 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
633 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
634 dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
635
636 switch (musb_mode) {
637
550a7375
FB		 638 case MUSB_HOST: /* Disable PHY ID detect, ground ID */
639 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
640 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
641 dev_conf |= TUSB_DEV_CONF_ID_SEL;
642 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
643 break;
550a7375
FB		 644 case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
645 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
646 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
647 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
648 break;
550a7375
FB		 649 case MUSB_OTG: /* Use PHY ID detection */
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
655 default:
5c8a86e1 656 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
96a274d1 657 return -EINVAL;
550a7375
FB		 658 }
659
660 musb_writel(tbase, TUSB_PHY_OTG_CTRL,
661 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
662 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
663 TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
664 musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
665
666 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
667 if ((musb_mode == MUSB_PERIPHERAL) &&
668 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
669 INFO("Cannot be peripheral with mini-A cable "
670 "otg_stat: %08x\n", otg_stat);
96a274d1
DB		 671
672 return 0;
550a7375
FB		 673}
674
675static inline unsigned long
676tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
677{
678 u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
679 unsigned long idle_timeout = 0;
d445b6da 680 struct usb_otg *otg = musb->xceiv->otg;
550a7375
FB		 681
682 /* ID pin */
683 if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
684 int default_a;
685
032ec49f 686 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
5c8a86e1 687 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
d445b6da 688 otg->default_a = default_a;
743411b3 689 tusb_musb_set_vbus(musb, default_a);
550a7375
FB		 690
691 /* Don't allow idling immediately */
692 if (default_a)
693 idle_timeout = jiffies + (HZ * 3);
694 }
695
696 /* VBUS state change */
697 if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
698
699 /* B-dev state machine: no vbus ~= disconnect */
032ec49f 700 if (!otg->default_a) {
550a7375
FB		 701 /* ? musb_root_disconnect(musb); */
702 musb->port1_status &=
703 ~(USB_PORT_STAT_CONNECTION
704 | USB_PORT_STAT_ENABLE
705 | USB_PORT_STAT_LOW_SPEED
706 | USB_PORT_STAT_HIGH_SPEED
707 | USB_PORT_STAT_TEST
708 );
550a7375
FB		 709
710 if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
5c8a86e1 711 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
e47d9254 712 if (musb->xceiv->otg->state != OTG_STATE_B_IDLE) {
550a7375 713 /* INTR_DISCONNECT can hide... */
e47d9254 714 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
550a7375
FB		 715 musb->int_usb |= MUSB_INTR_DISCONNECT;
716 }
717 musb->is_active = 0;
718 }
5c8a86e1 719 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
e47d9254 720 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
550a7375 721 idle_timeout = jiffies + (1 * HZ);
2bff3916 722 schedule_delayed_work(&musb->irq_work, 0);
550a7375
FB		 723
724 } else /* A-dev state machine */ {
5c8a86e1 725 dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
e47d9254 726 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
550a7375 727
e47d9254 728 switch (musb->xceiv->otg->state) {
550a7375 729 case OTG_STATE_A_IDLE:
5c8a86e1 730 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
743411b3 731 musb_platform_set_vbus(musb, 1);
550a7375
FB		 732
733 /* CONNECT can wake if a_wait_bcon is set */
734 if (musb->a_wait_bcon != 0)
735 musb->is_active = 0;
736 else
737 musb->is_active = 1;
738
739 /*
740 * OPT FS A TD.4.6 needs few seconds for
741 * A_WAIT_VRISE
742 */
743 idle_timeout = jiffies + (2 * HZ);
744
745 break;
746 case OTG_STATE_A_WAIT_VRISE:
747 /* ignore; A-session-valid < VBUS_VALID/2,
748 * we monitor this with the timer
749 */
750 break;
751 case OTG_STATE_A_WAIT_VFALL:
752 /* REVISIT this irq triggers during short
753 * spikes caused by enumeration ...
754 */
755 if (musb->vbuserr_retry) {
756 musb->vbuserr_retry--;
743411b3 757 tusb_musb_set_vbus(musb, 1);
550a7375
FB		 758 } else {
759 musb->vbuserr_retry
760 = VBUSERR_RETRY_COUNT;
743411b3 761 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 762 }
763 break;
764 default:
765 break;
766 }
767 }
768 }
769
770 /* OTG timer expiration */
771 if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
772 u8 devctl;
773
5c8a86e1 774 dev_dbg(musb->controller, "%s timer, %03x\n",
e47d9254 775 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
550a7375 776
e47d9254 777 switch (musb->xceiv->otg->state) {
550a7375
FB		 778 case OTG_STATE_A_WAIT_VRISE:
779 /* VBUS has probably been valid for a while now,
780 * but may well have bounced out of range a bit
781 */
782 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
783 if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
784 if ((devctl & MUSB_DEVCTL_VBUS)
785 != MUSB_DEVCTL_VBUS) {
5c8a86e1 786 dev_dbg(musb->controller, "devctl %02x\n", devctl);
550a7375
FB		 787 break;
788 }
e47d9254 789 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
550a7375
FB		 790 musb->is_active = 0;
791 idle_timeout = jiffies
792 + msecs_to_jiffies(musb->a_wait_bcon);
793 } else {
794 /* REVISIT report overcurrent to hub? */
795 ERR("vbus too slow, devctl %02x\n", devctl);
743411b3 796 tusb_musb_set_vbus(musb, 0);
550a7375
FB		 797 }
798 break;
799 case OTG_STATE_A_WAIT_BCON:
800 if (musb->a_wait_bcon != 0)
801 idle_timeout = jiffies
802 + msecs_to_jiffies(musb->a_wait_bcon);
803 break;
804 case OTG_STATE_A_SUSPEND:
805 break;
806 case OTG_STATE_B_WAIT_ACON:
807 break;
808 default:
809 break;
810 }
811 }
2bff3916 812 schedule_delayed_work(&musb->irq_work, 0);
550a7375
FB		 813
814 return idle_timeout;
815}
816
743411b3 817static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
550a7375
FB		 818{
819 struct musb *musb = __hci;
820 void __iomem *tbase = musb->ctrl_base;
821 unsigned long flags, idle_timeout = 0;
822 u32 int_mask, int_src;
823
824 spin_lock_irqsave(&musb->lock, flags);
825
826 /* Mask all interrupts to allow using both edge and level GPIO irq */
827 int_mask = musb_readl(tbase, TUSB_INT_MASK);
828 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
829
830 int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
5c8a86e1 831 dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
550a7375
FB		 832
833 musb->int_usb = (u8) int_src;
834
835 /* Acknowledge wake-up source interrupts */
836 if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
837 u32 reg;
838 u32 i;
839
7751b6fb 840 if (musb->tusb_revision == TUSB_REV_30)
550a7375
FB		 841 tusb_wbus_quirk(musb, 0);
842
843 /* there are issues re-locking the PLL on wakeup ... */
844
845 /* work around issue 8 */
846 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
847 musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
848 musb_writel(tbase, TUSB_SCRATCH_PAD, i);
849 reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
850 if (reg == i)
851 break;
5c8a86e1 852 dev_dbg(musb->controller, "TUSB NOR not ready\n");
550a7375
FB		 853 }
854
855 /* work around issue 13 (2nd half) */
856 tusb_set_clock_source(musb, 1);
857
858 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
859 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
860 if (reg & ~TUSB_PRCM_WNORCS) {
861 musb->is_active = 1;
2bff3916 862 schedule_delayed_work(&musb->irq_work, 0);
550a7375 863 }
5c8a86e1 864 dev_dbg(musb->controller, "wake %sactive %02x\n",
550a7375
FB		 865 musb->is_active ? "" : "in", reg);
866
867 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
868 }
869
870 if (int_src & TUSB_INT_SRC_USB_IP_CONN)
05678497 871 del_timer(&musb->dev_timer);
550a7375
FB		 872
873 /* OTG state change reports (annoyingly) not issued by Mentor core */
874 if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
875 | TUSB_INT_SRC_OTG_TIMEOUT
876 | TUSB_INT_SRC_ID_STATUS_CHNG))
877 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
878
47699b0a
PU		 879 /*
880 * Just clear the DMA interrupt if it comes as the completion for both
881 * TX and RX is handled by the DMA callback in tusb6010_omap
550a7375
FB		 882 */
883 if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
884 u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
550a7375 885
5c8a86e1 886 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
550a7375
FB		 887 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
888 }
889
890 /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
891 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
892 u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
893
894 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
895 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
896 musb->int_tx = (musb_src & 0xffff);
897 } else {
898 musb->int_rx = 0;
899 musb->int_tx = 0;
900 }
901
902 if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
903 musb_interrupt(musb);
904
905 /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
906 musb_writel(tbase, TUSB_INT_SRC_CLEAR,
907 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
908
743411b3 909 tusb_musb_try_idle(musb, idle_timeout);
550a7375
FB		 910
911 musb_writel(tbase, TUSB_INT_MASK, int_mask);
912 spin_unlock_irqrestore(&musb->lock, flags);
913
914 return IRQ_HANDLED;
915}
916
917static int dma_off;
918
919/*
920 * Enables TUSB6010. Caller must take care of locking.
921 * REVISIT:
922 * - Check what is unnecessary in MGC_HdrcStart()
923 */
743411b3 924static void tusb_musb_enable(struct musb *musb)
550a7375
FB		 925{
926 void __iomem *tbase = musb->ctrl_base;
927
928 /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
929 * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
930 musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
931
932 /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
933 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
934 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
935 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
936
937 /* Clear all subsystem interrups */
938 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
939 musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
940 musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
941
942 /* Acknowledge pending interrupt(s) */
943 musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
944
945 /* Only 0 clock cycles for minimum interrupt de-assertion time and
946 * interrupt polarity active low seems to work reliably here */
947 musb_writel(tbase, TUSB_INT_CTRL_CONF,
948 TUSB_INT_CTRL_CONF_INT_RELCYC(0));
949
dced35ae 950 irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
550a7375
FB		 951
952 /* maybe force into the Default-A OTG state machine */
953 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
954 & TUSB_DEV_OTG_STAT_ID_STATUS))
955 musb_writel(tbase, TUSB_INT_SRC_SET,
956 TUSB_INT_SRC_ID_STATUS_CHNG);
957
958 if (is_dma_capable() && dma_off)
959 printk(KERN_WARNING "%s %s: dma not reactivated\n",
960 __FILE__, __func__);
961 else
962 dma_off = 1;
963}
964
965/*
966 * Disables TUSB6010. Caller must take care of locking.
967 */
743411b3 968static void tusb_musb_disable(struct musb *musb)
550a7375
FB		 969{
970 void __iomem *tbase = musb->ctrl_base;
971
972 /* FIXME stop DMA, IRQs, timers, ... */
973
974 /* disable all IRQs */
975 musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
976 musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
977 musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
978 musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
979
05678497 980 del_timer(&musb->dev_timer);
550a7375
FB		 981
982 if (is_dma_capable() && !dma_off) {
983 printk(KERN_WARNING "%s %s: dma still active\n",
984 __FILE__, __func__);
985 dma_off = 1;
986 }
987}
988
989/*
990 * Sets up TUSB6010 CPU interface specific signals and registers
991 * Note: Settings optimized for OMAP24xx
992 */
743411b3 993static void tusb_setup_cpu_interface(struct musb *musb)
550a7375
FB		 994{
995 void __iomem *tbase = musb->ctrl_base;
996
997 /*
998 * Disable GPIO[5:0] pullups (used as output DMA requests)
999 * Don't disable GPIO[7:6] as they are needed for wake-up.
1000 */
1001 musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
1002
1003 /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
1004 musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
1005
1006 /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
1007 musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
1008
1009 /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
1010 * de-assertion time 2 system clocks p 62 */
1011 musb_writel(tbase, TUSB_DMA_REQ_CONF,
1012 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
1013 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
1014 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
1015
1016 /* Set 0 wait count for synchronous burst access */
1017 musb_writel(tbase, TUSB_WAIT_COUNT, 1);
1018}
1019
743411b3 1020static int tusb_musb_start(struct musb *musb)
550a7375
FB		 1021{
1022 void __iomem *tbase = musb->ctrl_base;
1023 int ret = 0;
1024 unsigned long flags;
1025 u32 reg;
1026
1027 if (musb->board_set_power)
1028 ret = musb->board_set_power(1);
1029 if (ret != 0) {
1030 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1031 return ret;
1032 }
1033
1034 spin_lock_irqsave(&musb->lock, flags);
1035
1036 if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1037 TUSB_PROD_TEST_RESET_VAL) {
1038 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1039 goto err;
1040 }
1041
8c240dc1 1042 musb->tusb_revision = tusb_get_revision(musb);
7751b6fb
MK		 1043 tusb_print_revision(musb);
1044 if (musb->tusb_revision < 2) {
550a7375 1045 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
7751b6fb 1046 musb->tusb_revision);
550a7375
FB		 1047 goto err;
1048 }
1049
1050 /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1051 * NOR FLASH interface is used */
1052 musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1053
1054 /* Select PHY free running 60MHz as a system clock */
1055 tusb_set_clock_source(musb, 1);
1056
1057 /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1058 * power saving, enable VBus detect and session end comparators,
1059 * enable IDpullup, enable VBus charging */
1060 musb_writel(tbase, TUSB_PRCM_MNGMT,
1061 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1062 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1063 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1064 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1065 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1066 tusb_setup_cpu_interface(musb);
1067
1068 /* simplify: always sense/pullup ID pins, as if in OTG mode */
1069 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1070 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1071 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1072
1073 reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1074 reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1075 musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1076
1077 spin_unlock_irqrestore(&musb->lock, flags);
1078
1079 return 0;
1080
1081err:
1082 spin_unlock_irqrestore(&musb->lock, flags);
1083
1084 if (musb->board_set_power)
1085 musb->board_set_power(0);
1086
1087 return -ENODEV;
1088}
1089
743411b3 1090static int tusb_musb_init(struct musb *musb)
550a7375
FB		 1091{
1092 struct platform_device *pdev;
1093 struct resource *mem;
84e250ff 1094 void __iomem *sync = NULL;
550a7375
FB		 1095 int ret;
1096
662dca54 1097 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee 1098 if (IS_ERR_OR_NULL(musb->xceiv))
25736e0c 1099 return -EPROBE_DEFER;
84e250ff 1100
550a7375
FB		 1101 pdev = to_platform_device(musb->controller);
1102
1103 /* dma address for async dma */
1104 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1105 musb->async = mem->start;
1106
1107 /* dma address for sync dma */
1108 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1109 if (!mem) {
1110 pr_debug("no sync dma resource?\n");
84e250ff
DB		 1111 ret = -ENODEV;
1112 goto done;
550a7375
FB		 1113 }
1114 musb->sync = mem->start;
1115
3d268645 1116 sync = ioremap(mem->start, resource_size(mem));
550a7375
FB		 1117 if (!sync) {
1118 pr_debug("ioremap for sync failed\n");
84e250ff
DB		 1119 ret = -ENOMEM;
1120 goto done;
550a7375
FB		 1121 }
1122 musb->sync_va = sync;
1123
1124 /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1125 * FIFOs at 0x600, TUSB at 0x800
1126 */
1127 musb->mregs += TUSB_BASE_OFFSET;
1128
743411b3 1129 ret = tusb_musb_start(musb);
550a7375
FB		 1130 if (ret) {
1131 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1132 ret);
84e250ff 1133 goto done;
550a7375 1134 }
743411b3 1135 musb->isr = tusb_musb_interrupt;
550a7375 1136
032ec49f
FB		 1137 musb->xceiv->set_power = tusb_draw_power;
1138 the_musb = musb;
550a7375 1139
05678497 1140 timer_setup(&musb->dev_timer, musb_do_idle, 0);
550a7375 1141
84e250ff
DB		 1142done:
1143 if (ret < 0) {
1144 if (sync)
1145 iounmap(sync);
f4053874 1146
721002ec 1147 usb_put_phy(musb->xceiv);
84e250ff 1148 }
550a7375
FB		 1149 return ret;
1150}
1151
743411b3 1152static int tusb_musb_exit(struct musb *musb)
550a7375 1153{
05678497 1154 del_timer_sync(&musb->dev_timer);
84e250ff 1155 the_musb = NULL;
550a7375
FB		 1156
1157 if (musb->board_set_power)
1158 musb->board_set_power(0);
1159
1160 iounmap(musb->sync_va);
f4053874 1161
721002ec 1162 usb_put_phy(musb->xceiv);
550a7375
FB		 1163 return 0;
1164}
743411b3 1165
f7ec9437 1166static const struct musb_platform_ops tusb_ops = {
0efc1356
PU		 1167 .quirks = MUSB_DMA_TUSB_OMAP | MUSB_IN_TUSB |
1168 MUSB_G_NO_SKB_RESERVE,
743411b3
FB		 1169 .init = tusb_musb_init,
1170 .exit = tusb_musb_exit,
1171
d026e9c7
TL		 1172 .ep_offset = tusb_ep_offset,
1173 .ep_select = tusb_ep_select,
9d506fc6
TL		 1174 .fifo_offset = tusb_fifo_offset,
1175 .readb = tusb_readb,
1176 .writeb = tusb_writeb,
1b40fc57
TL		 1177 .read_fifo = tusb_read_fifo,
1178 .write_fifo = tusb_write_fifo,
7f6283ed
TL		 1179#ifdef CONFIG_USB_TUSB_OMAP_DMA
1180 .dma_init = tusb_dma_controller_create,
1181 .dma_exit = tusb_dma_controller_destroy,
1182#endif
743411b3
FB		 1183 .enable = tusb_musb_enable,
1184 .disable = tusb_musb_disable,
1185
1186 .set_mode = tusb_musb_set_mode,
1187 .try_idle = tusb_musb_try_idle,
1188
1189 .vbus_status = tusb_musb_vbus_status,
1190 .set_vbus = tusb_musb_set_vbus,
1191};
18688fbe 1192
af384875
RK		 1193static const struct platform_device_info tusb_dev_info = {
1194 .name = "musb-hdrc",
1195 .id = PLATFORM_DEVID_AUTO,
1196 .dma_mask = DMA_BIT_MASK(32),
1197};
18688fbe 1198
41ac7b3a 1199static int tusb_probe(struct platform_device *pdev)
18688fbe 1200{
c1f01be4 1201 struct resource musb_resources[3];
c1a7d67c 1202 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
18688fbe 1203 struct platform_device *musb;
1add75d2 1204 struct tusb6010_glue *glue;
af384875 1205 struct platform_device_info pinfo;
cdfe35fb 1206 int ret;
18688fbe 1207
cdfe35fb 1208 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
6a58856f 1209 if (!glue)
cdfe35fb 1210 return -ENOMEM;
1add75d2 1211
1add75d2 1212 glue->dev = &pdev->dev;
1add75d2 1213
f7ec9437
FB		 1214 pdata->platform_ops = &tusb_ops;
1215
e741e637 1216 usb_phy_generic_register();
1add75d2 1217 platform_set_drvdata(pdev, glue);
18688fbe 1218
09fc7d22
FB		 1219 memset(musb_resources, 0x00, sizeof(*musb_resources) *
1220 ARRAY_SIZE(musb_resources));
1221
1222 musb_resources[0].name = pdev->resource[0].name;
1223 musb_resources[0].start = pdev->resource[0].start;
1224 musb_resources[0].end = pdev->resource[0].end;
1225 musb_resources[0].flags = pdev->resource[0].flags;
1226
1227 musb_resources[1].name = pdev->resource[1].name;
1228 musb_resources[1].start = pdev->resource[1].start;
1229 musb_resources[1].end = pdev->resource[1].end;
1230 musb_resources[1].flags = pdev->resource[1].flags;
1231
c1f01be4
KVA		 1232 musb_resources[2].name = pdev->resource[2].name;
1233 musb_resources[2].start = pdev->resource[2].start;
1234 musb_resources[2].end = pdev->resource[2].end;
1235 musb_resources[2].flags = pdev->resource[2].flags;
1236
af384875
RK		 1237 pinfo = tusb_dev_info;
1238 pinfo.parent = &pdev->dev;
1239 pinfo.res = musb_resources;
1240 pinfo.num_res = ARRAY_SIZE(musb_resources);
1241 pinfo.data = pdata;
1242 pinfo.size_data = sizeof(*pdata);
1243
1244 glue->musb = musb = platform_device_register_full(&pinfo);
1245 if (IS_ERR(musb)) {
1246 ret = PTR_ERR(musb);
1247 dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
cdfe35fb 1248 return ret;
18688fbe
FB		 1249 }
1250
1251 return 0;
18688fbe
FB		 1252}
1253
fb4e98ab 1254static int tusb_remove(struct platform_device *pdev)
18688fbe 1255{
1add75d2 1256 struct tusb6010_glue *glue = platform_get_drvdata(pdev);
18688fbe 1257
a81a01f9 1258 platform_device_unregister(glue->musb);
2f36ff69 1259 usb_phy_generic_unregister(glue->phy);
18688fbe
FB		 1260
1261 return 0;
1262}
1263
1264static struct platform_driver tusb_driver = {
e9e8c85e 1265 .probe = tusb_probe,
7690417d 1266 .remove = tusb_remove,
18688fbe
FB		 1267 .driver = {
1268 .name = "musb-tusb",
1269 },
1270};
1271
1272MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1273MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1274MODULE_LICENSE("GPL v2");
01380c08 1275module_platform_driver(tusb_driver);
Linux 6.x block layer and io_uring tree(s)