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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / usb / otg / isp1301_omap.c
blob611a09c5c9566102610a77ff4b863ef51a2d8553
1 /*
2 * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
3 *
4 * Copyright (C) 2004 Texas Instruments
5 * Copyright (C) 2004 David Brownell
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 as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/platform_device.h>
28 #include <linux/gpio.h>
29 #include <linux/usb/ch9.h>
30 #include <linux/usb/gadget.h>
31 #include <linux/usb.h>
32 #include <linux/usb/otg.h>
33 #include <linux/i2c.h>
34 #include <linux/workqueue.h>
35
36 #include <asm/irq.h>
37 #include <asm/mach-types.h>
38
39 #include <plat/usb.h>
40 #include <plat/mux.h>
41
42
43 #ifndef DEBUG
44 #undef VERBOSE
45 #endif
46
47
48 #define DRIVER_VERSION "24 August 2004"
49 #define DRIVER_NAME (isp1301_driver.driver.name)
50
51 MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
52 MODULE_LICENSE("GPL");
53
54 struct isp1301 {
55 struct otg_transceiver otg;
56 struct i2c_client *client;
57 void (*i2c_release)(struct device *dev);
58
59 int irq_type;
60
61 u32 last_otg_ctrl;
62 unsigned working:1;
63
64 struct timer_list timer;
65
66 /* use keventd context to change the state for us */
67 struct work_struct work;
68
69 unsigned long todo;
70 # define WORK_UPDATE_ISP 0 /* update ISP from OTG */
71 # define WORK_UPDATE_OTG 1 /* update OTG from ISP */
72 # define WORK_HOST_RESUME 4 /* resume host */
73 # define WORK_TIMER 6 /* timer fired */
74 # define WORK_STOP 7 /* don't resubmit */
75 };
76
77
78 /* bits in OTG_CTRL */
79
80 #define OTG_XCEIV_OUTPUTS \
81 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
82 #define OTG_XCEIV_INPUTS \
83 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
84 #define OTG_CTRL_BITS \
85 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
86 /* and OTG_PULLUP is sometimes written */
87
88 #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
89 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
90 OTG_CTRL_BITS)
91
92
93 /*-------------------------------------------------------------------------*/
94
95 /* board-specific PM hooks */
96
97 #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
98
99 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
100
101 #include <linux/i2c/tps65010.h>
102
103 #else
104
105 static inline int tps65010_set_vbus_draw(unsigned mA)
106 {
107 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
108 return 0;
109 }
110
111 #endif
112
113 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
114 {
115 int status = tps65010_set_vbus_draw(mA);
116 if (status < 0)
117 pr_debug(" VBUS %d mA error %d\n", mA, status);
118 }
119
120 #else
121
122 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
123 {
124 /* H4 controls this by DIP switch S2.4; no soft control.
125 * ON means the charger is always enabled. Leave it OFF
126 * unless the OTG port is used only in B-peripheral mode.
127 */
128 }
129
130 #endif
131
132 static void enable_vbus_source(struct isp1301 *isp)
133 {
134 /* this board won't supply more than 8mA vbus power.
135 * some boards can switch a 100ma "unit load" (or more).
136 */
137 }
138
139
140 /* products will deliver OTG messages with LEDs, GUI, etc */
141 static inline void notresponding(struct isp1301 *isp)
142 {
143 printk(KERN_NOTICE "OTG device not responding.\n");
144 }
145
146
147 /*-------------------------------------------------------------------------*/
148
149 static struct i2c_driver isp1301_driver;
150
151 /* smbus apis are used for portability */
152
153 static inline u8
154 isp1301_get_u8(struct isp1301 *isp, u8 reg)
155 {
156 return i2c_smbus_read_byte_data(isp->client, reg + 0);
157 }
158
159 static inline int
160 isp1301_get_u16(struct isp1301 *isp, u8 reg)
161 {
162 return i2c_smbus_read_word_data(isp->client, reg);
163 }
164
165 static inline int
166 isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
167 {
168 return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
169 }
170
171 static inline int
172 isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
173 {
174 return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
175 }
176
177 /*-------------------------------------------------------------------------*/
178
179 /* identification */
180 #define ISP1301_VENDOR_ID 0x00 /* u16 read */
181 #define ISP1301_PRODUCT_ID 0x02 /* u16 read */
182 #define ISP1301_BCD_DEVICE 0x14 /* u16 read */
183
184 #define I2C_VENDOR_ID_PHILIPS 0x04cc
185 #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
186
187 /* operational registers */
188 #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
189 # define MC1_SPEED (1 << 0)
190 # define MC1_SUSPEND (1 << 1)
191 # define MC1_DAT_SE0 (1 << 2)
192 # define MC1_TRANSPARENT (1 << 3)
193 # define MC1_BDIS_ACON_EN (1 << 4)
194 # define MC1_OE_INT_EN (1 << 5)
195 # define MC1_UART_EN (1 << 6)
196 # define MC1_MASK 0x7f
197 #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
198 # define MC2_GLOBAL_PWR_DN (1 << 0)
199 # define MC2_SPD_SUSP_CTRL (1 << 1)
200 # define MC2_BI_DI (1 << 2)
201 # define MC2_TRANSP_BDIR0 (1 << 3)
202 # define MC2_TRANSP_BDIR1 (1 << 4)
203 # define MC2_AUDIO_EN (1 << 5)
204 # define MC2_PSW_EN (1 << 6)
205 # define MC2_EN2V7 (1 << 7)
206 #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
207 # define OTG1_DP_PULLUP (1 << 0)
208 # define OTG1_DM_PULLUP (1 << 1)
209 # define OTG1_DP_PULLDOWN (1 << 2)
210 # define OTG1_DM_PULLDOWN (1 << 3)
211 # define OTG1_ID_PULLDOWN (1 << 4)
212 # define OTG1_VBUS_DRV (1 << 5)
213 # define OTG1_VBUS_DISCHRG (1 << 6)
214 # define OTG1_VBUS_CHRG (1 << 7)
215 #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
216 # define OTG_B_SESS_END (1 << 6)
217 # define OTG_B_SESS_VLD (1 << 7)
218
219 #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
220 #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
221
222 #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
223 #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
224
225 /* same bitfields in all interrupt registers */
226 # define INTR_VBUS_VLD (1 << 0)
227 # define INTR_SESS_VLD (1 << 1)
228 # define INTR_DP_HI (1 << 2)
229 # define INTR_ID_GND (1 << 3)
230 # define INTR_DM_HI (1 << 4)
231 # define INTR_ID_FLOAT (1 << 5)
232 # define INTR_BDIS_ACON (1 << 6)
233 # define INTR_CR_INT (1 << 7)
234
235 /*-------------------------------------------------------------------------*/
236
237 static const char *state_string(enum usb_otg_state state)
238 {
239 switch (state) {
240 case OTG_STATE_A_IDLE: return "a_idle";
241 case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
242 case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
243 case OTG_STATE_A_HOST: return "a_host";
244 case OTG_STATE_A_SUSPEND: return "a_suspend";
245 case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
246 case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
247 case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
248 case OTG_STATE_B_IDLE: return "b_idle";
249 case OTG_STATE_B_SRP_INIT: return "b_srp_init";
250 case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
251 case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
252 case OTG_STATE_B_HOST: return "b_host";
253 default: return "UNDEFINED";
254 }
255 }
256
257 static inline const char *state_name(struct isp1301 *isp)
258 {
259 return state_string(isp->otg.state);
260 }
261
262 /*-------------------------------------------------------------------------*/
263
264 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
265 * not everything is guarded by board-specific checks, or even using
266 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
267 *
268 * ALSO: this currently doesn't use ISP1301 low-power modes
269 * while OTG is running.
270 */
271
272 static void power_down(struct isp1301 *isp)
273 {
274 isp->otg.state = OTG_STATE_UNDEFINED;
275
276 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
277 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
278
279 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
280 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
281 }
282
283 static void power_up(struct isp1301 *isp)
284 {
285 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
286 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
287
288 /* do this only when cpu is driving transceiver,
289 * so host won't see a low speed device...
290 */
291 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
292 }
293
294 #define NO_HOST_SUSPEND
295
296 static int host_suspend(struct isp1301 *isp)
297 {
298 #ifdef NO_HOST_SUSPEND
299 return 0;
300 #else
301 struct device *dev;
302
303 if (!isp->otg.host)
304 return -ENODEV;
305
306 /* Currently ASSUMES only the OTG port matters;
307 * other ports could be active...
308 */
309 dev = isp->otg.host->controller;
310 return dev->driver->suspend(dev, 3, 0);
311 #endif
312 }
313
314 static int host_resume(struct isp1301 *isp)
315 {
316 #ifdef NO_HOST_SUSPEND
317 return 0;
318 #else
319 struct device *dev;
320
321 if (!isp->otg.host)
322 return -ENODEV;
323
324 dev = isp->otg.host->controller;
325 return dev->driver->resume(dev, 0);
326 #endif
327 }
328
329 static int gadget_suspend(struct isp1301 *isp)
330 {
331 isp->otg.gadget->b_hnp_enable = 0;
332 isp->otg.gadget->a_hnp_support = 0;
333 isp->otg.gadget->a_alt_hnp_support = 0;
334 return usb_gadget_vbus_disconnect(isp->otg.gadget);
335 }
336
337 /*-------------------------------------------------------------------------*/
338
339 #define TIMER_MINUTES 10
340 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
341
342 /* Almost all our I2C messaging comes from a work queue's task context.
343 * NOTE: guaranteeing certain response times might mean we shouldn't
344 * share keventd's work queue; a realtime task might be safest.
345 */
346 static void isp1301_defer_work(struct isp1301 *isp, int work)
347 {
348 int status;
349
350 if (isp && !test_and_set_bit(work, &isp->todo)) {
351 (void) get_device(&isp->client->dev);
352 status = schedule_work(&isp->work);
353 if (!status && !isp->working)
354 dev_vdbg(&isp->client->dev,
355 "work item %d may be lost\n", work);
356 }
357 }
358
359 /* called from irq handlers */
360 static void a_idle(struct isp1301 *isp, const char *tag)
361 {
362 u32 l;
363
364 if (isp->otg.state == OTG_STATE_A_IDLE)
365 return;
366
367 isp->otg.default_a = 1;
368 if (isp->otg.host) {
369 isp->otg.host->is_b_host = 0;
370 host_suspend(isp);
371 }
372 if (isp->otg.gadget) {
373 isp->otg.gadget->is_a_peripheral = 1;
374 gadget_suspend(isp);
375 }
376 isp->otg.state = OTG_STATE_A_IDLE;
377 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
378 omap_writel(l, OTG_CTRL);
379 isp->last_otg_ctrl = l;
380 pr_debug(" --> %s/%s\n", state_name(isp), tag);
381 }
382
383 /* called from irq handlers */
384 static void b_idle(struct isp1301 *isp, const char *tag)
385 {
386 u32 l;
387
388 if (isp->otg.state == OTG_STATE_B_IDLE)
389 return;
390
391 isp->otg.default_a = 0;
392 if (isp->otg.host) {
393 isp->otg.host->is_b_host = 1;
394 host_suspend(isp);
395 }
396 if (isp->otg.gadget) {
397 isp->otg.gadget->is_a_peripheral = 0;
398 gadget_suspend(isp);
399 }
400 isp->otg.state = OTG_STATE_B_IDLE;
401 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
402 omap_writel(l, OTG_CTRL);
403 isp->last_otg_ctrl = l;
404 pr_debug(" --> %s/%s\n", state_name(isp), tag);
405 }
406
407 static void
408 dump_regs(struct isp1301 *isp, const char *label)
409 {
410 #ifdef DEBUG
411 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
412 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
413 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
414
415 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
416 omap_readl(OTG_CTRL), label, state_name(isp),
417 ctrl, status, src);
418 /* mode control and irq enables don't change much */
419 #endif
420 }
421
422 /*-------------------------------------------------------------------------*/
423
424 #ifdef CONFIG_USB_OTG
425
426 /*
427 * The OMAP OTG controller handles most of the OTG state transitions.
428 *
429 * We translate isp1301 outputs (mostly voltage comparator status) into
430 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
431 * flags into isp1301 inputs ... and infer state transitions.
432 */
433
434 #ifdef VERBOSE
435
436 static void check_state(struct isp1301 *isp, const char *tag)
437 {
438 enum usb_otg_state state = OTG_STATE_UNDEFINED;
439 u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
440 unsigned extra = 0;
441
442 switch (fsm) {
443
444 /* default-b */
445 case 0x0:
446 state = OTG_STATE_B_IDLE;
447 break;
448 case 0x3:
449 case 0x7:
450 extra = 1;
451 case 0x1:
452 state = OTG_STATE_B_PERIPHERAL;
453 break;
454 case 0x11:
455 state = OTG_STATE_B_SRP_INIT;
456 break;
457
458 /* extra dual-role default-b states */
459 case 0x12:
460 case 0x13:
461 case 0x16:
462 extra = 1;
463 case 0x17:
464 state = OTG_STATE_B_WAIT_ACON;
465 break;
466 case 0x34:
467 state = OTG_STATE_B_HOST;
468 break;
469
470 /* default-a */
471 case 0x36:
472 state = OTG_STATE_A_IDLE;
473 break;
474 case 0x3c:
475 state = OTG_STATE_A_WAIT_VFALL;
476 break;
477 case 0x7d:
478 state = OTG_STATE_A_VBUS_ERR;
479 break;
480 case 0x9e:
481 case 0x9f:
482 extra = 1;
483 case 0x89:
484 state = OTG_STATE_A_PERIPHERAL;
485 break;
486 case 0xb7:
487 state = OTG_STATE_A_WAIT_VRISE;
488 break;
489 case 0xb8:
490 state = OTG_STATE_A_WAIT_BCON;
491 break;
492 case 0xb9:
493 state = OTG_STATE_A_HOST;
494 break;
495 case 0xba:
496 state = OTG_STATE_A_SUSPEND;
497 break;
498 default:
499 break;
500 }
501 if (isp->otg.state == state && !extra)
502 return;
503 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
504 state_string(state), fsm, state_name(isp),
505 omap_readl(OTG_CTRL));
506 }
507
508 #else
509
510 static inline void check_state(struct isp1301 *isp, const char *tag) { }
511
512 #endif
513
514 /* outputs from ISP1301_INTERRUPT_SOURCE */
515 static void update_otg1(struct isp1301 *isp, u8 int_src)
516 {
517 u32 otg_ctrl;
518
519 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
520 otg_ctrl &= ~OTG_XCEIV_INPUTS;
521 otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
522
523 if (int_src & INTR_SESS_VLD)
524 otg_ctrl |= OTG_ASESSVLD;
525 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
526 a_idle(isp, "vfall");
527 otg_ctrl &= ~OTG_CTRL_BITS;
528 }
529 if (int_src & INTR_VBUS_VLD)
530 otg_ctrl |= OTG_VBUSVLD;
531 if (int_src & INTR_ID_GND) { /* default-A */
532 if (isp->otg.state == OTG_STATE_B_IDLE
533 || isp->otg.state == OTG_STATE_UNDEFINED) {
534 a_idle(isp, "init");
535 return;
536 }
537 } else { /* default-B */
538 otg_ctrl |= OTG_ID;
539 if (isp->otg.state == OTG_STATE_A_IDLE
540 || isp->otg.state == OTG_STATE_UNDEFINED) {
541 b_idle(isp, "init");
542 return;
543 }
544 }
545 omap_writel(otg_ctrl, OTG_CTRL);
546 }
547
548 /* outputs from ISP1301_OTG_STATUS */
549 static void update_otg2(struct isp1301 *isp, u8 otg_status)
550 {
551 u32 otg_ctrl;
552
553 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
554 otg_ctrl &= ~OTG_XCEIV_INPUTS;
555 otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
556 if (otg_status & OTG_B_SESS_VLD)
557 otg_ctrl |= OTG_BSESSVLD;
558 else if (otg_status & OTG_B_SESS_END)
559 otg_ctrl |= OTG_BSESSEND;
560 omap_writel(otg_ctrl, OTG_CTRL);
561 }
562
563 /* inputs going to ISP1301 */
564 static void otg_update_isp(struct isp1301 *isp)
565 {
566 u32 otg_ctrl, otg_change;
567 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
568
569 otg_ctrl = omap_readl(OTG_CTRL);
570 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
571 isp->last_otg_ctrl = otg_ctrl;
572 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
573
574 switch (isp->otg.state) {
575 case OTG_STATE_B_IDLE:
576 case OTG_STATE_B_PERIPHERAL:
577 case OTG_STATE_B_SRP_INIT:
578 if (!(otg_ctrl & OTG_PULLUP)) {
579 // if (otg_ctrl & OTG_B_HNPEN) {
580 if (isp->otg.gadget->b_hnp_enable) {
581 isp->otg.state = OTG_STATE_B_WAIT_ACON;
582 pr_debug(" --> b_wait_acon\n");
583 }
584 goto pulldown;
585 }
586 pullup:
587 set |= OTG1_DP_PULLUP;
588 clr |= OTG1_DP_PULLDOWN;
589 break;
590 case OTG_STATE_A_SUSPEND:
591 case OTG_STATE_A_PERIPHERAL:
592 if (otg_ctrl & OTG_PULLUP)
593 goto pullup;
594 /* FALLTHROUGH */
595 // case OTG_STATE_B_WAIT_ACON:
596 default:
597 pulldown:
598 set |= OTG1_DP_PULLDOWN;
599 clr |= OTG1_DP_PULLUP;
600 break;
601 }
602
603 # define toggle(OTG,ISP) do { \
604 if (otg_ctrl & OTG) set |= ISP; \
605 else clr |= ISP; \
606 } while (0)
607
608 if (!(isp->otg.host))
609 otg_ctrl &= ~OTG_DRV_VBUS;
610
611 switch (isp->otg.state) {
612 case OTG_STATE_A_SUSPEND:
613 if (otg_ctrl & OTG_DRV_VBUS) {
614 set |= OTG1_VBUS_DRV;
615 break;
616 }
617 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
618 notresponding(isp);
619
620 /* FALLTHROUGH */
621 case OTG_STATE_A_VBUS_ERR:
622 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
623 pr_debug(" --> a_wait_vfall\n");
624 /* FALLTHROUGH */
625 case OTG_STATE_A_WAIT_VFALL:
626 clr |= OTG1_VBUS_DRV;
627 break;
628 case OTG_STATE_A_IDLE:
629 if (otg_ctrl & OTG_DRV_VBUS) {
630 isp->otg.state = OTG_STATE_A_WAIT_VRISE;
631 pr_debug(" --> a_wait_vrise\n");
632 }
633 /* FALLTHROUGH */
634 default:
635 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
636 }
637
638 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
639 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
640
641 # undef toggle
642
643 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
644 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
645
646 /* HNP switch to host or peripheral; and SRP */
647 if (otg_change & OTG_PULLUP) {
648 u32 l;
649
650 switch (isp->otg.state) {
651 case OTG_STATE_B_IDLE:
652 if (clr & OTG1_DP_PULLUP)
653 break;
654 isp->otg.state = OTG_STATE_B_PERIPHERAL;
655 pr_debug(" --> b_peripheral\n");
656 break;
657 case OTG_STATE_A_SUSPEND:
658 if (clr & OTG1_DP_PULLUP)
659 break;
660 isp->otg.state = OTG_STATE_A_PERIPHERAL;
661 pr_debug(" --> a_peripheral\n");
662 break;
663 default:
664 break;
665 }
666 l = omap_readl(OTG_CTRL);
667 l |= OTG_PULLUP;
668 omap_writel(l, OTG_CTRL);
669 }
670
671 check_state(isp, __func__);
672 dump_regs(isp, "otg->isp1301");
673 }
674
675 static irqreturn_t omap_otg_irq(int irq, void *_isp)
676 {
677 u16 otg_irq = omap_readw(OTG_IRQ_SRC);
678 u32 otg_ctrl;
679 int ret = IRQ_NONE;
680 struct isp1301 *isp = _isp;
681
682 /* update ISP1301 transciever from OTG controller */
683 if (otg_irq & OPRT_CHG) {
684 omap_writew(OPRT_CHG, OTG_IRQ_SRC);
685 isp1301_defer_work(isp, WORK_UPDATE_ISP);
686 ret = IRQ_HANDLED;
687
688 /* SRP to become b_peripheral failed */
689 } else if (otg_irq & B_SRP_TMROUT) {
690 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
691 notresponding(isp);
692
693 /* gadget drivers that care should monitor all kinds of
694 * remote wakeup (SRP, normal) using their own timer
695 * to give "check cable and A-device" messages.
696 */
697 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
698 b_idle(isp, "srp_timeout");
699
700 omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
701 ret = IRQ_HANDLED;
702
703 /* HNP to become b_host failed */
704 } else if (otg_irq & B_HNP_FAIL) {
705 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
706 state_name(isp), omap_readl(OTG_CTRL));
707 notresponding(isp);
708
709 otg_ctrl = omap_readl(OTG_CTRL);
710 otg_ctrl |= OTG_BUSDROP;
711 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
712 omap_writel(otg_ctrl, OTG_CTRL);
713
714 /* subset of b_peripheral()... */
715 isp->otg.state = OTG_STATE_B_PERIPHERAL;
716 pr_debug(" --> b_peripheral\n");
717
718 omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
719 ret = IRQ_HANDLED;
720
721 /* detect SRP from B-device ... */
722 } else if (otg_irq & A_SRP_DETECT) {
723 pr_debug("otg: %s SRP_DETECT, %06x\n",
724 state_name(isp), omap_readl(OTG_CTRL));
725
726 isp1301_defer_work(isp, WORK_UPDATE_OTG);
727 switch (isp->otg.state) {
728 case OTG_STATE_A_IDLE:
729 if (!isp->otg.host)
730 break;
731 isp1301_defer_work(isp, WORK_HOST_RESUME);
732 otg_ctrl = omap_readl(OTG_CTRL);
733 otg_ctrl |= OTG_A_BUSREQ;
734 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
735 & ~OTG_XCEIV_INPUTS
736 & OTG_CTRL_MASK;
737 omap_writel(otg_ctrl, OTG_CTRL);
738 break;
739 default:
740 break;
741 }
742
743 omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
744 ret = IRQ_HANDLED;
745
746 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
747 * we don't track them separately
748 */
749 } else if (otg_irq & A_REQ_TMROUT) {
750 otg_ctrl = omap_readl(OTG_CTRL);
751 pr_info("otg: BCON_TMOUT from %s, %06x\n",
752 state_name(isp), otg_ctrl);
753 notresponding(isp);
754
755 otg_ctrl |= OTG_BUSDROP;
756 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
757 omap_writel(otg_ctrl, OTG_CTRL);
758 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
759
760 omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
761 ret = IRQ_HANDLED;
762
763 /* A-supplied voltage fell too low; overcurrent */
764 } else if (otg_irq & A_VBUS_ERR) {
765 otg_ctrl = omap_readl(OTG_CTRL);
766 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
767 state_name(isp), otg_irq, otg_ctrl);
768
769 otg_ctrl |= OTG_BUSDROP;
770 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
771 omap_writel(otg_ctrl, OTG_CTRL);
772 isp->otg.state = OTG_STATE_A_VBUS_ERR;
773
774 omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
775 ret = IRQ_HANDLED;
776
777 /* switch driver; the transciever code activates it,
778 * ungating the udc clock or resuming OHCI.
779 */
780 } else if (otg_irq & DRIVER_SWITCH) {
781 int kick = 0;
782
783 otg_ctrl = omap_readl(OTG_CTRL);
784 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
785 state_name(isp),
786 (otg_ctrl & OTG_DRIVER_SEL)
787 ? "gadget" : "host",
788 otg_ctrl);
789 isp1301_defer_work(isp, WORK_UPDATE_ISP);
790
791 /* role is peripheral */
792 if (otg_ctrl & OTG_DRIVER_SEL) {
793 switch (isp->otg.state) {
794 case OTG_STATE_A_IDLE:
795 b_idle(isp, __func__);
796 break;
797 default:
798 break;
799 }
800 isp1301_defer_work(isp, WORK_UPDATE_ISP);
801
802 /* role is host */
803 } else {
804 if (!(otg_ctrl & OTG_ID)) {
805 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
806 omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
807 }
808
809 if (isp->otg.host) {
810 switch (isp->otg.state) {
811 case OTG_STATE_B_WAIT_ACON:
812 isp->otg.state = OTG_STATE_B_HOST;
813 pr_debug(" --> b_host\n");
814 kick = 1;
815 break;
816 case OTG_STATE_A_WAIT_BCON:
817 isp->otg.state = OTG_STATE_A_HOST;
818 pr_debug(" --> a_host\n");
819 break;
820 case OTG_STATE_A_PERIPHERAL:
821 isp->otg.state = OTG_STATE_A_WAIT_BCON;
822 pr_debug(" --> a_wait_bcon\n");
823 break;
824 default:
825 break;
826 }
827 isp1301_defer_work(isp, WORK_HOST_RESUME);
828 }
829 }
830
831 omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
832 ret = IRQ_HANDLED;
833
834 if (kick)
835 usb_bus_start_enum(isp->otg.host,
836 isp->otg.host->otg_port);
837 }
838
839 check_state(isp, __func__);
840 return ret;
841 }
842
843 static struct platform_device *otg_dev;
844
845 static int isp1301_otg_init(struct isp1301 *isp)
846 {
847 u32 l;
848
849 if (!otg_dev)
850 return -ENODEV;
851
852 dump_regs(isp, __func__);
853 /* some of these values are board-specific... */
854 l = omap_readl(OTG_SYSCON_2);
855 l |= OTG_EN
856 /* for B-device: */
857 | SRP_GPDATA /* 9msec Bdev D+ pulse */
858 | SRP_GPDVBUS /* discharge after VBUS pulse */
859 // | (3 << 24) /* 2msec VBUS pulse */
860 /* for A-device: */
861 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
862 | SRP_DPW /* detect 167+ns SRP pulses */
863 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
864 ;
865 omap_writel(l, OTG_SYSCON_2);
866
867 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
868 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
869
870 check_state(isp, __func__);
871 pr_debug("otg: %s, %s %06x\n",
872 state_name(isp), __func__, omap_readl(OTG_CTRL));
873
874 omap_writew(DRIVER_SWITCH | OPRT_CHG
875 | B_SRP_TMROUT | B_HNP_FAIL
876 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
877
878 l = omap_readl(OTG_SYSCON_2);
879 l |= OTG_EN;
880 omap_writel(l, OTG_SYSCON_2);
881
882 return 0;
883 }
884
885 static int otg_probe(struct platform_device *dev)
886 {
887 // struct omap_usb_config *config = dev->platform_data;
888
889 otg_dev = dev;
890 return 0;
891 }
892
893 static int otg_remove(struct platform_device *dev)
894 {
895 otg_dev = NULL;
896 return 0;
897 }
898
899 static struct platform_driver omap_otg_driver = {
900 .probe = otg_probe,
901 .remove = otg_remove,
902 .driver = {
903 .owner = THIS_MODULE,
904 .name = "omap_otg",
905 },
906 };
907
908 static int otg_bind(struct isp1301 *isp)
909 {
910 int status;
911
912 if (otg_dev)
913 return -EBUSY;
914
915 status = platform_driver_register(&omap_otg_driver);
916 if (status < 0)
917 return status;
918
919 if (otg_dev)
920 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
921 IRQF_DISABLED, DRIVER_NAME, isp);
922 else
923 status = -ENODEV;
924
925 if (status < 0)
926 platform_driver_unregister(&omap_otg_driver);
927 return status;
928 }
929
930 static void otg_unbind(struct isp1301 *isp)
931 {
932 if (!otg_dev)
933 return;
934 free_irq(otg_dev->resource[1].start, isp);
935 }
936
937 #else
938
939 /* OTG controller isn't clocked */
940
941 #endif /* CONFIG_USB_OTG */
942
943 /*-------------------------------------------------------------------------*/
944
945 static void b_peripheral(struct isp1301 *isp)
946 {
947 u32 l;
948
949 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
950 omap_writel(l, OTG_CTRL);
951
952 usb_gadget_vbus_connect(isp->otg.gadget);
953
954 #ifdef CONFIG_USB_OTG
955 enable_vbus_draw(isp, 8);
956 otg_update_isp(isp);
957 #else
958 enable_vbus_draw(isp, 100);
959 /* UDC driver just set OTG_BSESSVLD */
960 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
961 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
962 isp->otg.state = OTG_STATE_B_PERIPHERAL;
963 pr_debug(" --> b_peripheral\n");
964 dump_regs(isp, "2periph");
965 #endif
966 }
967
968 static void isp_update_otg(struct isp1301 *isp, u8 stat)
969 {
970 u8 isp_stat, isp_bstat;
971 enum usb_otg_state state = isp->otg.state;
972
973 if (stat & INTR_BDIS_ACON)
974 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
975
976 /* start certain state transitions right away */
977 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
978 if (isp_stat & INTR_ID_GND) {
979 if (isp->otg.default_a) {
980 switch (state) {
981 case OTG_STATE_B_IDLE:
982 a_idle(isp, "idle");
983 /* FALLTHROUGH */
984 case OTG_STATE_A_IDLE:
985 enable_vbus_source(isp);
986 /* FALLTHROUGH */
987 case OTG_STATE_A_WAIT_VRISE:
988 /* we skip over OTG_STATE_A_WAIT_BCON, since
989 * the HC will transition to A_HOST (or
990 * A_SUSPEND!) without our noticing except
991 * when HNP is used.
992 */
993 if (isp_stat & INTR_VBUS_VLD)
994 isp->otg.state = OTG_STATE_A_HOST;
995 break;
996 case OTG_STATE_A_WAIT_VFALL:
997 if (!(isp_stat & INTR_SESS_VLD))
998 a_idle(isp, "vfell");
999 break;
1000 default:
1001 if (!(isp_stat & INTR_VBUS_VLD))
1002 isp->otg.state = OTG_STATE_A_VBUS_ERR;
1003 break;
1004 }
1005 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1006 } else {
1007 switch (state) {
1008 case OTG_STATE_B_PERIPHERAL:
1009 case OTG_STATE_B_HOST:
1010 case OTG_STATE_B_WAIT_ACON:
1011 usb_gadget_vbus_disconnect(isp->otg.gadget);
1012 break;
1013 default:
1014 break;
1015 }
1016 if (state != OTG_STATE_A_IDLE)
1017 a_idle(isp, "id");
1018 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1019 isp1301_defer_work(isp, WORK_HOST_RESUME);
1020 isp_bstat = 0;
1021 }
1022 } else {
1023 u32 l;
1024
1025 /* if user unplugged mini-A end of cable,
1026 * don't bypass A_WAIT_VFALL.
1027 */
1028 if (isp->otg.default_a) {
1029 switch (state) {
1030 default:
1031 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1032 break;
1033 case OTG_STATE_A_WAIT_VFALL:
1034 state = OTG_STATE_A_IDLE;
1035 /* khubd may take a while to notice and
1036 * handle this disconnect, so don't go
1037 * to B_IDLE quite yet.
1038 */
1039 break;
1040 case OTG_STATE_A_IDLE:
1041 host_suspend(isp);
1042 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1043 MC1_BDIS_ACON_EN);
1044 isp->otg.state = OTG_STATE_B_IDLE;
1045 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1046 l &= ~OTG_CTRL_BITS;
1047 omap_writel(l, OTG_CTRL);
1048 break;
1049 case OTG_STATE_B_IDLE:
1050 break;
1051 }
1052 }
1053 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1054
1055 switch (isp->otg.state) {
1056 case OTG_STATE_B_PERIPHERAL:
1057 case OTG_STATE_B_WAIT_ACON:
1058 case OTG_STATE_B_HOST:
1059 if (likely(isp_bstat & OTG_B_SESS_VLD))
1060 break;
1061 enable_vbus_draw(isp, 0);
1062 #ifndef CONFIG_USB_OTG
1063 /* UDC driver will clear OTG_BSESSVLD */
1064 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1065 OTG1_DP_PULLDOWN);
1066 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1067 OTG1_DP_PULLUP);
1068 dump_regs(isp, __func__);
1069 #endif
1070 /* FALLTHROUGH */
1071 case OTG_STATE_B_SRP_INIT:
1072 b_idle(isp, __func__);
1073 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
1074 omap_writel(l, OTG_CTRL);
1075 /* FALLTHROUGH */
1076 case OTG_STATE_B_IDLE:
1077 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1078 #ifdef CONFIG_USB_OTG
1079 update_otg1(isp, isp_stat);
1080 update_otg2(isp, isp_bstat);
1081 #endif
1082 b_peripheral(isp);
1083 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1084 isp_bstat |= OTG_B_SESS_END;
1085 break;
1086 case OTG_STATE_A_WAIT_VFALL:
1087 break;
1088 default:
1089 pr_debug("otg: unsupported b-device %s\n",
1090 state_name(isp));
1091 break;
1092 }
1093 }
1094
1095 if (state != isp->otg.state)
1096 pr_debug(" isp, %s -> %s\n",
1097 state_string(state), state_name(isp));
1098
1099 #ifdef CONFIG_USB_OTG
1100 /* update the OTG controller state to match the isp1301; may
1101 * trigger OPRT_CHG irqs for changes going to the isp1301.
1102 */
1103 update_otg1(isp, isp_stat);
1104 update_otg2(isp, isp_bstat);
1105 check_state(isp, __func__);
1106 #endif
1107
1108 dump_regs(isp, "isp1301->otg");
1109 }
1110
1111 /*-------------------------------------------------------------------------*/
1112
1113 static u8 isp1301_clear_latch(struct isp1301 *isp)
1114 {
1115 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1116 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1117 return latch;
1118 }
1119
1120 static void
1121 isp1301_work(struct work_struct *work)
1122 {
1123 struct isp1301 *isp = container_of(work, struct isp1301, work);
1124 int stop;
1125
1126 /* implicit lock: we're the only task using this device */
1127 isp->working = 1;
1128 do {
1129 stop = test_bit(WORK_STOP, &isp->todo);
1130
1131 #ifdef CONFIG_USB_OTG
1132 /* transfer state from otg engine to isp1301 */
1133 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1134 otg_update_isp(isp);
1135 put_device(&isp->client->dev);
1136 }
1137 #endif
1138 /* transfer state from isp1301 to otg engine */
1139 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1140 u8 stat = isp1301_clear_latch(isp);
1141
1142 isp_update_otg(isp, stat);
1143 put_device(&isp->client->dev);
1144 }
1145
1146 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1147 u32 otg_ctrl;
1148
1149 /*
1150 * skip A_WAIT_VRISE; hc transitions invisibly
1151 * skip A_WAIT_BCON; same.
1152 */
1153 switch (isp->otg.state) {
1154 case OTG_STATE_A_WAIT_BCON:
1155 case OTG_STATE_A_WAIT_VRISE:
1156 isp->otg.state = OTG_STATE_A_HOST;
1157 pr_debug(" --> a_host\n");
1158 otg_ctrl = omap_readl(OTG_CTRL);
1159 otg_ctrl |= OTG_A_BUSREQ;
1160 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1161 & OTG_CTRL_MASK;
1162 omap_writel(otg_ctrl, OTG_CTRL);
1163 break;
1164 case OTG_STATE_B_WAIT_ACON:
1165 isp->otg.state = OTG_STATE_B_HOST;
1166 pr_debug(" --> b_host (acon)\n");
1167 break;
1168 case OTG_STATE_B_HOST:
1169 case OTG_STATE_B_IDLE:
1170 case OTG_STATE_A_IDLE:
1171 break;
1172 default:
1173 pr_debug(" host resume in %s\n",
1174 state_name(isp));
1175 }
1176 host_resume(isp);
1177 // mdelay(10);
1178 put_device(&isp->client->dev);
1179 }
1180
1181 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1182 #ifdef VERBOSE
1183 dump_regs(isp, "timer");
1184 if (!stop)
1185 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1186 #endif
1187 put_device(&isp->client->dev);
1188 }
1189
1190 if (isp->todo)
1191 dev_vdbg(&isp->client->dev,
1192 "work done, todo = 0x%lx\n",
1193 isp->todo);
1194 if (stop) {
1195 dev_dbg(&isp->client->dev, "stop\n");
1196 break;
1197 }
1198 } while (isp->todo);
1199 isp->working = 0;
1200 }
1201
1202 static irqreturn_t isp1301_irq(int irq, void *isp)
1203 {
1204 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1205 return IRQ_HANDLED;
1206 }
1207
1208 static void isp1301_timer(unsigned long _isp)
1209 {
1210 isp1301_defer_work((void *)_isp, WORK_TIMER);
1211 }
1212
1213 /*-------------------------------------------------------------------------*/
1214
1215 static void isp1301_release(struct device *dev)
1216 {
1217 struct isp1301 *isp;
1218
1219 isp = dev_get_drvdata(dev);
1220
1221
1222 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1223 if (isp->i2c_release)
1224 isp->i2c_release(dev);
1225 kfree (isp);
1226 }
1227
1228 static struct isp1301 *the_transceiver;
1229
1230 static int __exit isp1301_remove(struct i2c_client *i2c)
1231 {
1232 struct isp1301 *isp;
1233
1234 isp = i2c_get_clientdata(i2c);
1235
1236 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1237 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1238 free_irq(i2c->irq, isp);
1239 #ifdef CONFIG_USB_OTG
1240 otg_unbind(isp);
1241 #endif
1242 if (machine_is_omap_h2())
1243 gpio_free(2);
1244
1245 isp->timer.data = 0;
1246 set_bit(WORK_STOP, &isp->todo);
1247 del_timer_sync(&isp->timer);
1248 flush_scheduled_work();
1249
1250 put_device(&i2c->dev);
1251 the_transceiver = NULL;
1252
1253 return 0;
1254 }
1255
1256 /*-------------------------------------------------------------------------*/
1257
1258 /* NOTE: three modes are possible here, only one of which
1259 * will be standards-conformant on any given system:
1260 *
1261 * - OTG mode (dual-role), required if there's a Mini-AB connector
1262 * - HOST mode, for when there's one or more A (host) connectors
1263 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1264 *
1265 * As a rule, you won't have an isp1301 chip unless it's there to
1266 * support the OTG mode. Other modes help testing USB controllers
1267 * in isolation from (full) OTG support, or maybe so later board
1268 * revisions can help to support those feature.
1269 */
1270
1271 #ifdef CONFIG_USB_OTG
1272
1273 static int isp1301_otg_enable(struct isp1301 *isp)
1274 {
1275 power_up(isp);
1276 isp1301_otg_init(isp);
1277
1278 /* NOTE: since we don't change this, this provides
1279 * a few more interrupts than are strictly needed.
1280 */
1281 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1282 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1283 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1284 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1285
1286 dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
1287
1288 return 0;
1289 }
1290
1291 #endif
1292
1293 /* add or disable the host device+driver */
1294 static int
1295 isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
1296 {
1297 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1298
1299 if (!otg || isp != the_transceiver)
1300 return -ENODEV;
1301
1302 if (!host) {
1303 omap_writew(0, OTG_IRQ_EN);
1304 power_down(isp);
1305 isp->otg.host = NULL;
1306 return 0;
1307 }
1308
1309 #ifdef CONFIG_USB_OTG
1310 isp->otg.host = host;
1311 dev_dbg(&isp->client->dev, "registered host\n");
1312 host_suspend(isp);
1313 if (isp->otg.gadget)
1314 return isp1301_otg_enable(isp);
1315 return 0;
1316
1317 #elif !defined(CONFIG_USB_GADGET_OMAP)
1318 isp->otg.host = host;
1319
1320 power_up(isp);
1321
1322 if (machine_is_omap_h2())
1323 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1324
1325 dev_info(&isp->client->dev, "A-Host sessions ok\n");
1326 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1327 INTR_ID_GND);
1328 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1329 INTR_ID_GND);
1330
1331 /* If this has a Mini-AB connector, this mode is highly
1332 * nonstandard ... but can be handy for testing, especially with
1333 * the Mini-A end of an OTG cable. (Or something nonstandard
1334 * like MiniB-to-StandardB, maybe built with a gender mender.)
1335 */
1336 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1337
1338 dump_regs(isp, __func__);
1339
1340 return 0;
1341
1342 #else
1343 dev_dbg(&isp->client->dev, "host sessions not allowed\n");
1344 return -EINVAL;
1345 #endif
1346
1347 }
1348
1349 static int
1350 isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1351 {
1352 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1353 #ifndef CONFIG_USB_OTG
1354 u32 l;
1355 #endif
1356
1357 if (!otg || isp != the_transceiver)
1358 return -ENODEV;
1359
1360 if (!gadget) {
1361 omap_writew(0, OTG_IRQ_EN);
1362 if (!isp->otg.default_a)
1363 enable_vbus_draw(isp, 0);
1364 usb_gadget_vbus_disconnect(isp->otg.gadget);
1365 isp->otg.gadget = NULL;
1366 power_down(isp);
1367 return 0;
1368 }
1369
1370 #ifdef CONFIG_USB_OTG
1371 isp->otg.gadget = gadget;
1372 dev_dbg(&isp->client->dev, "registered gadget\n");
1373 /* gadget driver may be suspended until vbus_connect () */
1374 if (isp->otg.host)
1375 return isp1301_otg_enable(isp);
1376 return 0;
1377
1378 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1379 isp->otg.gadget = gadget;
1380
1381 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1382 l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
1383 l |= OTG_ID;
1384 omap_writel(l, OTG_CTRL);
1385
1386 power_up(isp);
1387 isp->otg.state = OTG_STATE_B_IDLE;
1388
1389 if (machine_is_omap_h2() || machine_is_omap_h3())
1390 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1391
1392 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1393 INTR_SESS_VLD);
1394 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1395 INTR_VBUS_VLD);
1396 dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1397 dump_regs(isp, __func__);
1398
1399 /* If this has a Mini-AB connector, this mode is highly
1400 * nonstandard ... but can be handy for testing, so long
1401 * as you don't plug a Mini-A cable into the jack.
1402 */
1403 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1404 b_peripheral(isp);
1405
1406 return 0;
1407
1408 #else
1409 dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
1410 return -EINVAL;
1411 #endif
1412 }
1413
1414
1415 /*-------------------------------------------------------------------------*/
1416
1417 static int
1418 isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1419 {
1420 if (!the_transceiver)
1421 return -ENODEV;
1422 if (dev->state == OTG_STATE_B_PERIPHERAL)
1423 enable_vbus_draw(the_transceiver, mA);
1424 return 0;
1425 }
1426
1427 static int
1428 isp1301_start_srp(struct otg_transceiver *dev)
1429 {
1430 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1431 u32 otg_ctrl;
1432
1433 if (!dev || isp != the_transceiver
1434 || isp->otg.state != OTG_STATE_B_IDLE)
1435 return -ENODEV;
1436
1437 otg_ctrl = omap_readl(OTG_CTRL);
1438 if (!(otg_ctrl & OTG_BSESSEND))
1439 return -EINVAL;
1440
1441 otg_ctrl |= OTG_B_BUSREQ;
1442 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1443 omap_writel(otg_ctrl, OTG_CTRL);
1444 isp->otg.state = OTG_STATE_B_SRP_INIT;
1445
1446 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
1447 omap_readl(OTG_CTRL));
1448 #ifdef CONFIG_USB_OTG
1449 check_state(isp, __func__);
1450 #endif
1451 return 0;
1452 }
1453
1454 static int
1455 isp1301_start_hnp(struct otg_transceiver *dev)
1456 {
1457 #ifdef CONFIG_USB_OTG
1458 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1459 u32 l;
1460
1461 if (!dev || isp != the_transceiver)
1462 return -ENODEV;
1463 if (isp->otg.default_a && (isp->otg.host == NULL
1464 || !isp->otg.host->b_hnp_enable))
1465 return -ENOTCONN;
1466 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1467 || !isp->otg.gadget->b_hnp_enable))
1468 return -ENOTCONN;
1469
1470 /* We want hardware to manage most HNP protocol timings.
1471 * So do this part as early as possible...
1472 */
1473 switch (isp->otg.state) {
1474 case OTG_STATE_B_HOST:
1475 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1476 /* caller will suspend next */
1477 break;
1478 case OTG_STATE_A_HOST:
1479 /* caller must suspend then clear A_BUSREQ */
1480 usb_gadget_vbus_connect(isp->otg.gadget);
1481 l = omap_readl(OTG_CTRL);
1482 l |= OTG_A_SETB_HNPEN;
1483 omap_writel(l, OTG_CTRL);
1484
1485 break;
1486 case OTG_STATE_A_PERIPHERAL:
1487 /* initiated by B-Host suspend */
1488 break;
1489 default:
1490 return -EILSEQ;
1491 }
1492 pr_debug("otg: HNP %s, %06x ...\n",
1493 state_name(isp), omap_readl(OTG_CTRL));
1494 check_state(isp, __func__);
1495 return 0;
1496 #else
1497 /* srp-only */
1498 return -EINVAL;
1499 #endif
1500 }
1501
1502 /*-------------------------------------------------------------------------*/
1503
1504 static int __init
1505 isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
1506 {
1507 int status;
1508 struct isp1301 *isp;
1509
1510 if (the_transceiver)
1511 return 0;
1512
1513 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1514 if (!isp)
1515 return 0;
1516
1517 INIT_WORK(&isp->work, isp1301_work);
1518 init_timer(&isp->timer);
1519 isp->timer.function = isp1301_timer;
1520 isp->timer.data = (unsigned long) isp;
1521
1522 i2c_set_clientdata(i2c, isp);
1523 isp->client = i2c;
1524
1525 /* verify the chip (shouldn't be necesary) */
1526 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1527 if (status != I2C_VENDOR_ID_PHILIPS) {
1528 dev_dbg(&i2c->dev, "not philips id: %d\n", status);
1529 goto fail;
1530 }
1531 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1532 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1533 dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
1534 goto fail;
1535 }
1536 isp->i2c_release = i2c->dev.release;
1537 i2c->dev.release = isp1301_release;
1538
1539 /* initial development used chiprev 2.00 */
1540 status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
1541 dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1542 status >> 8, status & 0xff);
1543
1544 /* make like power-on reset */
1545 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1546
1547 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1548 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1549
1550 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1551 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1552 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1553 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1554
1555 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1556 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1557 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1558
1559 #ifdef CONFIG_USB_OTG
1560 status = otg_bind(isp);
1561 if (status < 0) {
1562 dev_dbg(&i2c->dev, "can't bind OTG\n");
1563 goto fail;
1564 }
1565 #endif
1566
1567 if (machine_is_omap_h2()) {
1568 /* full speed signaling by default */
1569 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1570 MC1_SPEED);
1571 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
1572 MC2_SPD_SUSP_CTRL);
1573
1574 /* IRQ wired at M14 */
1575 omap_cfg_reg(M14_1510_GPIO2);
1576 if (gpio_request(2, "isp1301") == 0)
1577 gpio_direction_input(2);
1578 isp->irq_type = IRQF_TRIGGER_FALLING;
1579 }
1580
1581 isp->irq_type |= IRQF_SAMPLE_RANDOM;
1582 status = request_irq(i2c->irq, isp1301_irq,
1583 isp->irq_type, DRIVER_NAME, isp);
1584 if (status < 0) {
1585 dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1586 i2c->irq, status);
1587 goto fail;
1588 }
1589
1590 isp->otg.dev = &i2c->dev;
1591 isp->otg.label = DRIVER_NAME;
1592
1593 isp->otg.set_host = isp1301_set_host,
1594 isp->otg.set_peripheral = isp1301_set_peripheral,
1595 isp->otg.set_power = isp1301_set_power,
1596 isp->otg.start_srp = isp1301_start_srp,
1597 isp->otg.start_hnp = isp1301_start_hnp,
1598
1599 enable_vbus_draw(isp, 0);
1600 power_down(isp);
1601 the_transceiver = isp;
1602
1603 #ifdef CONFIG_USB_OTG
1604 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1605 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1606 #endif
1607
1608 dump_regs(isp, __func__);
1609
1610 #ifdef VERBOSE
1611 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1612 dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1613 #endif
1614
1615 status = otg_set_transceiver(&isp->otg);
1616 if (status < 0)
1617 dev_err(&i2c->dev, "can't register transceiver, %d\n",
1618 status);
1619
1620 return 0;
1621
1622 fail:
1623 kfree(isp);
1624 return -ENODEV;
1625 }
1626
1627 static const struct i2c_device_id isp1301_id[] = {
1628 { "isp1301_omap", 0 },
1629 { }
1630 };
1631 MODULE_DEVICE_TABLE(i2c, isp1301_id);
1632
1633 static struct i2c_driver isp1301_driver = {
1634 .driver = {
1635 .name = "isp1301_omap",
1636 },
1637 .probe = isp1301_probe,
1638 .remove = __exit_p(isp1301_remove),
1639 .id_table = isp1301_id,
1640 };
1641
1642 /*-------------------------------------------------------------------------*/
1643
1644 static int __init isp_init(void)
1645 {
1646 return i2c_add_driver(&isp1301_driver);
1647 }
1648 subsys_initcall(isp_init);
1649
1650 static void __exit isp_exit(void)
1651 {
1652 if (the_transceiver)
1653 otg_set_transceiver(NULL);
1654 i2c_del_driver(&isp1301_driver);
1655 }
1656 module_exit(isp_exit);
Tomato firmware and modifications.