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[CRYPTO] api: Remove deprecated interface
[pv_ops_mirror.git] / drivers / i2c / chips / isp1301_omap.c
blobccdf3e90862ba4b979736b6955113067c69c248f
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 #undef DEBUG
22 #undef VERBOSE
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/interrupt.h>
29 #include <linux/platform_device.h>
30 #include <linux/usb_ch9.h>
31 #include <linux/usb_gadget.h>
32 #include <linux/usb.h>
33 #include <linux/usb/otg.h>
34 #include <linux/i2c.h>
35 #include <linux/workqueue.h>
36
37 #include <asm/irq.h>
38 #include <asm/arch/usb.h>
39
40
41 #ifndef DEBUG
42 #undef VERBOSE
43 #endif
44
45
46 #define DRIVER_VERSION "24 August 2004"
47 #define DRIVER_NAME (isp1301_driver.name)
48
49 MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
50 MODULE_LICENSE("GPL");
51
52 struct isp1301 {
53 struct otg_transceiver otg;
54 struct i2c_client client;
55 void (*i2c_release)(struct device *dev);
56
57 int irq;
58
59 u32 last_otg_ctrl;
60 unsigned working:1;
61
62 struct timer_list timer;
63
64 /* use keventd context to change the state for us */
65 struct work_struct work;
66
67 unsigned long todo;
68 # define WORK_UPDATE_ISP 0 /* update ISP from OTG */
69 # define WORK_UPDATE_OTG 1 /* update OTG from ISP */
70 # define WORK_HOST_RESUME 4 /* resume host */
71 # define WORK_TIMER 6 /* timer fired */
72 # define WORK_STOP 7 /* don't resubmit */
73 };
74
75
76 /* bits in OTG_CTRL_REG */
77
78 #define OTG_XCEIV_OUTPUTS \
79 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
80 #define OTG_XCEIV_INPUTS \
81 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
82 #define OTG_CTRL_BITS \
83 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
84 /* and OTG_PULLUP is sometimes written */
85
86 #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
87 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
88 OTG_CTRL_BITS)
89
90
91 /*-------------------------------------------------------------------------*/
92
93 #ifdef CONFIG_MACH_OMAP_H2
94
95 /* board-specific PM hooks */
96
97 #include <asm/arch/gpio.h>
98 #include <asm/arch/mux.h>
99 #include <asm/mach-types.h>
100
101
102 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
103
104 #include <asm/arch/tps65010.h>
105
106 #else
107
108 static inline int tps65010_set_vbus_draw(unsigned mA)
109 {
110 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
111 return 0;
112 }
113
114 #endif
115
116 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
117 {
118 int status = tps65010_set_vbus_draw(mA);
119 if (status < 0)
120 pr_debug(" VBUS %d mA error %d\n", mA, status);
121 }
122
123 static void enable_vbus_source(struct isp1301 *isp)
124 {
125 /* this board won't supply more than 8mA vbus power.
126 * some boards can switch a 100ma "unit load" (or more).
127 */
128 }
129
130
131 /* products will deliver OTG messages with LEDs, GUI, etc */
132 static inline void notresponding(struct isp1301 *isp)
133 {
134 printk(KERN_NOTICE "OTG device not responding.\n");
135 }
136
137
138 #endif
139
140 /*-------------------------------------------------------------------------*/
141
142 /* only two addresses possible */
143 #define ISP_BASE 0x2c
144 static unsigned short normal_i2c[] = {
145 ISP_BASE, ISP_BASE + 1,
146 I2C_CLIENT_END };
147
148 I2C_CLIENT_INSMOD;
149
150 static struct i2c_driver isp1301_driver;
151
152 /* smbus apis are used for portability */
153
154 static inline u8
155 isp1301_get_u8(struct isp1301 *isp, u8 reg)
156 {
157 return i2c_smbus_read_byte_data(&isp->client, reg + 0);
158 }
159
160 static inline int
161 isp1301_get_u16(struct isp1301 *isp, u8 reg)
162 {
163 return i2c_smbus_read_word_data(&isp->client, reg);
164 }
165
166 static inline int
167 isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
168 {
169 return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits);
170 }
171
172 static inline int
173 isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
174 {
175 return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits);
176 }
177
178 /*-------------------------------------------------------------------------*/
179
180 /* identification */
181 #define ISP1301_VENDOR_ID 0x00 /* u16 read */
182 #define ISP1301_PRODUCT_ID 0x02 /* u16 read */
183 #define ISP1301_BCD_DEVICE 0x14 /* u16 read */
184
185 #define I2C_VENDOR_ID_PHILIPS 0x04cc
186 #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
187
188 /* operational registers */
189 #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
190 # define MC1_SPEED_REG (1 << 0)
191 # define MC1_SUSPEND_REG (1 << 1)
192 # define MC1_DAT_SE0 (1 << 2)
193 # define MC1_TRANSPARENT (1 << 3)
194 # define MC1_BDIS_ACON_EN (1 << 4)
195 # define MC1_OE_INT_EN (1 << 5)
196 # define MC1_UART_EN (1 << 6)
197 # define MC1_MASK 0x7f
198 #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
199 # define MC2_GLOBAL_PWR_DN (1 << 0)
200 # define MC2_SPD_SUSP_CTRL (1 << 1)
201 # define MC2_BI_DI (1 << 2)
202 # define MC2_TRANSP_BDIR0 (1 << 3)
203 # define MC2_TRANSP_BDIR1 (1 << 4)
204 # define MC2_AUDIO_EN (1 << 5)
205 # define MC2_PSW_EN (1 << 6)
206 # define MC2_EN2V7 (1 << 7)
207 #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
208 # define OTG1_DP_PULLUP (1 << 0)
209 # define OTG1_DM_PULLUP (1 << 1)
210 # define OTG1_DP_PULLDOWN (1 << 2)
211 # define OTG1_DM_PULLDOWN (1 << 3)
212 # define OTG1_ID_PULLDOWN (1 << 4)
213 # define OTG1_VBUS_DRV (1 << 5)
214 # define OTG1_VBUS_DISCHRG (1 << 6)
215 # define OTG1_VBUS_CHRG (1 << 7)
216 #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
217 # define OTG_B_SESS_END (1 << 6)
218 # define OTG_B_SESS_VLD (1 << 7)
219
220 #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
221 #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
222
223 #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
224 #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
225
226 /* same bitfields in all interrupt registers */
227 # define INTR_VBUS_VLD (1 << 0)
228 # define INTR_SESS_VLD (1 << 1)
229 # define INTR_DP_HI (1 << 2)
230 # define INTR_ID_GND (1 << 3)
231 # define INTR_DM_HI (1 << 4)
232 # define INTR_ID_FLOAT (1 << 5)
233 # define INTR_BDIS_ACON (1 << 6)
234 # define INTR_CR_INT (1 << 7)
235
236 /*-------------------------------------------------------------------------*/
237
238 static const char *state_string(enum usb_otg_state state)
239 {
240 switch (state) {
241 case OTG_STATE_A_IDLE: return "a_idle";
242 case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
243 case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
244 case OTG_STATE_A_HOST: return "a_host";
245 case OTG_STATE_A_SUSPEND: return "a_suspend";
246 case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
247 case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
248 case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
249 case OTG_STATE_B_IDLE: return "b_idle";
250 case OTG_STATE_B_SRP_INIT: return "b_srp_init";
251 case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
252 case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
253 case OTG_STATE_B_HOST: return "b_host";
254 default: return "UNDEFINED";
255 }
256 }
257
258 static inline const char *state_name(struct isp1301 *isp)
259 {
260 return state_string(isp->otg.state);
261 }
262
263 #ifdef VERBOSE
264 #define dev_vdbg dev_dbg
265 #else
266 #define dev_vdbg(dev, fmt, arg...) do{}while(0)
267 #endif
268
269 /*-------------------------------------------------------------------------*/
270
271 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
272 * not everything is guarded by board-specific checks, or even using
273 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
274 *
275 * ALSO: this currently doesn't use ISP1301 low-power modes
276 * while OTG is running.
277 */
278
279 static void power_down(struct isp1301 *isp)
280 {
281 isp->otg.state = OTG_STATE_UNDEFINED;
282
283 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
284 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG);
285
286 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
287 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
288 }
289
290 static void power_up(struct isp1301 *isp)
291 {
292 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
293 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG);
294
295 /* do this only when cpu is driving transceiver,
296 * so host won't see a low speed device...
297 */
298 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
299 }
300
301 #define NO_HOST_SUSPEND
302
303 static int host_suspend(struct isp1301 *isp)
304 {
305 #ifdef NO_HOST_SUSPEND
306 return 0;
307 #else
308 struct device *dev;
309
310 if (!isp->otg.host)
311 return -ENODEV;
312
313 /* Currently ASSUMES only the OTG port matters;
314 * other ports could be active...
315 */
316 dev = isp->otg.host->controller;
317 return dev->driver->suspend(dev, 3, 0);
318 #endif
319 }
320
321 static int host_resume(struct isp1301 *isp)
322 {
323 #ifdef NO_HOST_SUSPEND
324 return 0;
325 #else
326 struct device *dev;
327
328 if (!isp->otg.host)
329 return -ENODEV;
330
331 dev = isp->otg.host->controller;
332 return dev->driver->resume(dev, 0);
333 #endif
334 }
335
336 static int gadget_suspend(struct isp1301 *isp)
337 {
338 isp->otg.gadget->b_hnp_enable = 0;
339 isp->otg.gadget->a_hnp_support = 0;
340 isp->otg.gadget->a_alt_hnp_support = 0;
341 return usb_gadget_vbus_disconnect(isp->otg.gadget);
342 }
343
344 /*-------------------------------------------------------------------------*/
345
346 #define TIMER_MINUTES 10
347 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
348
349 /* Almost all our I2C messaging comes from a work queue's task context.
350 * NOTE: guaranteeing certain response times might mean we shouldn't
351 * share keventd's work queue; a realtime task might be safest.
352 */
353 void
354 isp1301_defer_work(struct isp1301 *isp, int work)
355 {
356 int status;
357
358 if (isp && !test_and_set_bit(work, &isp->todo)) {
359 (void) get_device(&isp->client.dev);
360 status = schedule_work(&isp->work);
361 if (!status && !isp->working)
362 dev_vdbg(&isp->client.dev,
363 "work item %d may be lost\n", work);
364 }
365 }
366
367 /* called from irq handlers */
368 static void a_idle(struct isp1301 *isp, const char *tag)
369 {
370 if (isp->otg.state == OTG_STATE_A_IDLE)
371 return;
372
373 isp->otg.default_a = 1;
374 if (isp->otg.host) {
375 isp->otg.host->is_b_host = 0;
376 host_suspend(isp);
377 }
378 if (isp->otg.gadget) {
379 isp->otg.gadget->is_a_peripheral = 1;
380 gadget_suspend(isp);
381 }
382 isp->otg.state = OTG_STATE_A_IDLE;
383 isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
384 pr_debug(" --> %s/%s\n", state_name(isp), tag);
385 }
386
387 /* called from irq handlers */
388 static void b_idle(struct isp1301 *isp, const char *tag)
389 {
390 if (isp->otg.state == OTG_STATE_B_IDLE)
391 return;
392
393 isp->otg.default_a = 0;
394 if (isp->otg.host) {
395 isp->otg.host->is_b_host = 1;
396 host_suspend(isp);
397 }
398 if (isp->otg.gadget) {
399 isp->otg.gadget->is_a_peripheral = 0;
400 gadget_suspend(isp);
401 }
402 isp->otg.state = OTG_STATE_B_IDLE;
403 isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
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 OTG_CTRL_REG, 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 = OTG_TEST_REG & 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), OTG_CTRL_REG);
505 }
506
507 #else
508
509 static inline void check_state(struct isp1301 *isp, const char *tag) { }
510
511 #endif
512
513 /* outputs from ISP1301_INTERRUPT_SOURCE */
514 static void update_otg1(struct isp1301 *isp, u8 int_src)
515 {
516 u32 otg_ctrl;
517
518 otg_ctrl = OTG_CTRL_REG
519 & OTG_CTRL_MASK
520 & ~OTG_XCEIV_INPUTS
521 & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
522 if (int_src & INTR_SESS_VLD)
523 otg_ctrl |= OTG_ASESSVLD;
524 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
525 a_idle(isp, "vfall");
526 otg_ctrl &= ~OTG_CTRL_BITS;
527 }
528 if (int_src & INTR_VBUS_VLD)
529 otg_ctrl |= OTG_VBUSVLD;
530 if (int_src & INTR_ID_GND) { /* default-A */
531 if (isp->otg.state == OTG_STATE_B_IDLE
532 || isp->otg.state == OTG_STATE_UNDEFINED) {
533 a_idle(isp, "init");
534 return;
535 }
536 } else { /* default-B */
537 otg_ctrl |= OTG_ID;
538 if (isp->otg.state == OTG_STATE_A_IDLE
539 || isp->otg.state == OTG_STATE_UNDEFINED) {
540 b_idle(isp, "init");
541 return;
542 }
543 }
544 OTG_CTRL_REG = otg_ctrl;
545 }
546
547 /* outputs from ISP1301_OTG_STATUS */
548 static void update_otg2(struct isp1301 *isp, u8 otg_status)
549 {
550 u32 otg_ctrl;
551
552 otg_ctrl = OTG_CTRL_REG
553 & OTG_CTRL_MASK
554 & ~OTG_XCEIV_INPUTS
555 & ~(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 OTG_CTRL_REG = 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 = OTG_CTRL_REG;
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 /* FIXME usbcore thinks port power is still on ... */
627 clr |= OTG1_VBUS_DRV;
628 break;
629 case OTG_STATE_A_IDLE:
630 if (otg_ctrl & OTG_DRV_VBUS) {
631 isp->otg.state = OTG_STATE_A_WAIT_VRISE;
632 pr_debug(" --> a_wait_vrise\n");
633 }
634 /* FALLTHROUGH */
635 default:
636 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
637 }
638
639 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
640 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
641
642 # undef toggle
643
644 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
645 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
646
647 /* HNP switch to host or peripheral; and SRP */
648 if (otg_change & OTG_PULLUP) {
649 switch (isp->otg.state) {
650 case OTG_STATE_B_IDLE:
651 if (clr & OTG1_DP_PULLUP)
652 break;
653 isp->otg.state = OTG_STATE_B_PERIPHERAL;
654 pr_debug(" --> b_peripheral\n");
655 break;
656 case OTG_STATE_A_SUSPEND:
657 if (clr & OTG1_DP_PULLUP)
658 break;
659 isp->otg.state = OTG_STATE_A_PERIPHERAL;
660 pr_debug(" --> a_peripheral\n");
661 break;
662 default:
663 break;
664 }
665 OTG_CTRL_REG |= OTG_PULLUP;
666 }
667
668 check_state(isp, __FUNCTION__);
669 dump_regs(isp, "otg->isp1301");
670 }
671
672 static irqreturn_t omap_otg_irq(int irq, void *_isp)
673 {
674 u16 otg_irq = OTG_IRQ_SRC_REG;
675 u32 otg_ctrl;
676 int ret = IRQ_NONE;
677 struct isp1301 *isp = _isp;
678
679 /* update ISP1301 transciever from OTG controller */
680 if (otg_irq & OPRT_CHG) {
681 OTG_IRQ_SRC_REG = OPRT_CHG;
682 isp1301_defer_work(isp, WORK_UPDATE_ISP);
683 ret = IRQ_HANDLED;
684
685 /* SRP to become b_peripheral failed */
686 } else if (otg_irq & B_SRP_TMROUT) {
687 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG);
688 notresponding(isp);
689
690 /* gadget drivers that care should monitor all kinds of
691 * remote wakeup (SRP, normal) using their own timer
692 * to give "check cable and A-device" messages.
693 */
694 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
695 b_idle(isp, "srp_timeout");
696
697 OTG_IRQ_SRC_REG = B_SRP_TMROUT;
698 ret = IRQ_HANDLED;
699
700 /* HNP to become b_host failed */
701 } else if (otg_irq & B_HNP_FAIL) {
702 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
703 state_name(isp), OTG_CTRL_REG);
704 notresponding(isp);
705
706 otg_ctrl = OTG_CTRL_REG;
707 otg_ctrl |= OTG_BUSDROP;
708 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
709 OTG_CTRL_REG = otg_ctrl;
710
711 /* subset of b_peripheral()... */
712 isp->otg.state = OTG_STATE_B_PERIPHERAL;
713 pr_debug(" --> b_peripheral\n");
714
715 OTG_IRQ_SRC_REG = B_HNP_FAIL;
716 ret = IRQ_HANDLED;
717
718 /* detect SRP from B-device ... */
719 } else if (otg_irq & A_SRP_DETECT) {
720 pr_debug("otg: %s SRP_DETECT, %06x\n",
721 state_name(isp), OTG_CTRL_REG);
722
723 isp1301_defer_work(isp, WORK_UPDATE_OTG);
724 switch (isp->otg.state) {
725 case OTG_STATE_A_IDLE:
726 if (!isp->otg.host)
727 break;
728 isp1301_defer_work(isp, WORK_HOST_RESUME);
729 otg_ctrl = OTG_CTRL_REG;
730 otg_ctrl |= OTG_A_BUSREQ;
731 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
732 & ~OTG_XCEIV_INPUTS
733 & OTG_CTRL_MASK;
734 OTG_CTRL_REG = otg_ctrl;
735 break;
736 default:
737 break;
738 }
739
740 OTG_IRQ_SRC_REG = A_SRP_DETECT;
741 ret = IRQ_HANDLED;
742
743 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
744 * we don't track them separately
745 */
746 } else if (otg_irq & A_REQ_TMROUT) {
747 otg_ctrl = OTG_CTRL_REG;
748 pr_info("otg: BCON_TMOUT from %s, %06x\n",
749 state_name(isp), otg_ctrl);
750 notresponding(isp);
751
752 otg_ctrl |= OTG_BUSDROP;
753 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
754 OTG_CTRL_REG = otg_ctrl;
755 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
756
757 OTG_IRQ_SRC_REG = A_REQ_TMROUT;
758 ret = IRQ_HANDLED;
759
760 /* A-supplied voltage fell too low; overcurrent */
761 } else if (otg_irq & A_VBUS_ERR) {
762 otg_ctrl = OTG_CTRL_REG;
763 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
764 state_name(isp), otg_irq, otg_ctrl);
765
766 otg_ctrl |= OTG_BUSDROP;
767 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
768 OTG_CTRL_REG = otg_ctrl;
769 isp->otg.state = OTG_STATE_A_VBUS_ERR;
770
771 OTG_IRQ_SRC_REG = A_VBUS_ERR;
772 ret = IRQ_HANDLED;
773
774 /* switch driver; the transciever code activates it,
775 * ungating the udc clock or resuming OHCI.
776 */
777 } else if (otg_irq & DRIVER_SWITCH) {
778 int kick = 0;
779
780 otg_ctrl = OTG_CTRL_REG;
781 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
782 state_name(isp),
783 (otg_ctrl & OTG_DRIVER_SEL)
784 ? "gadget" : "host",
785 otg_ctrl);
786 isp1301_defer_work(isp, WORK_UPDATE_ISP);
787
788 /* role is peripheral */
789 if (otg_ctrl & OTG_DRIVER_SEL) {
790 switch (isp->otg.state) {
791 case OTG_STATE_A_IDLE:
792 b_idle(isp, __FUNCTION__);
793 break;
794 default:
795 break;
796 }
797 isp1301_defer_work(isp, WORK_UPDATE_ISP);
798
799 /* role is host */
800 } else {
801 if (!(otg_ctrl & OTG_ID)) {
802 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
803 OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ;
804 }
805
806 if (isp->otg.host) {
807 switch (isp->otg.state) {
808 case OTG_STATE_B_WAIT_ACON:
809 isp->otg.state = OTG_STATE_B_HOST;
810 pr_debug(" --> b_host\n");
811 kick = 1;
812 break;
813 case OTG_STATE_A_WAIT_BCON:
814 isp->otg.state = OTG_STATE_A_HOST;
815 pr_debug(" --> a_host\n");
816 break;
817 case OTG_STATE_A_PERIPHERAL:
818 isp->otg.state = OTG_STATE_A_WAIT_BCON;
819 pr_debug(" --> a_wait_bcon\n");
820 break;
821 default:
822 break;
823 }
824 isp1301_defer_work(isp, WORK_HOST_RESUME);
825 }
826 }
827
828 OTG_IRQ_SRC_REG = DRIVER_SWITCH;
829 ret = IRQ_HANDLED;
830
831 if (kick)
832 usb_bus_start_enum(isp->otg.host,
833 isp->otg.host->otg_port);
834 }
835
836 check_state(isp, __FUNCTION__);
837 return ret;
838 }
839
840 static struct platform_device *otg_dev;
841
842 static int otg_init(struct isp1301 *isp)
843 {
844 if (!otg_dev)
845 return -ENODEV;
846
847 dump_regs(isp, __FUNCTION__);
848 /* some of these values are board-specific... */
849 OTG_SYSCON_2_REG |= OTG_EN
850 /* for B-device: */
851 | SRP_GPDATA /* 9msec Bdev D+ pulse */
852 | SRP_GPDVBUS /* discharge after VBUS pulse */
853 // | (3 << 24) /* 2msec VBUS pulse */
854 /* for A-device: */
855 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
856 | SRP_DPW /* detect 167+ns SRP pulses */
857 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
858 ;
859
860 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
861 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
862
863 check_state(isp, __FUNCTION__);
864 pr_debug("otg: %s, %s %06x\n",
865 state_name(isp), __FUNCTION__, OTG_CTRL_REG);
866
867 OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG
868 | B_SRP_TMROUT | B_HNP_FAIL
869 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT;
870 OTG_SYSCON_2_REG |= OTG_EN;
871
872 return 0;
873 }
874
875 static int otg_probe(struct platform_device *dev)
876 {
877 // struct omap_usb_config *config = dev->platform_data;
878
879 otg_dev = dev;
880 return 0;
881 }
882
883 static int otg_remove(struct platform_device *dev)
884 {
885 otg_dev = 0;
886 return 0;
887 }
888
889 struct platform_driver omap_otg_driver = {
890 .probe = otg_probe,
891 .remove = otg_remove,
892 .driver = {
893 .owner = THIS_MODULE,
894 .name = "omap_otg",
895 },
896 };
897
898 static int otg_bind(struct isp1301 *isp)
899 {
900 int status;
901
902 if (otg_dev)
903 return -EBUSY;
904
905 status = platform_driver_register(&omap_otg_driver);
906 if (status < 0)
907 return status;
908
909 if (otg_dev)
910 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
911 IRQF_DISABLED, DRIVER_NAME, isp);
912 else
913 status = -ENODEV;
914
915 if (status < 0)
916 platform_driver_unregister(&omap_otg_driver);
917 return status;
918 }
919
920 static void otg_unbind(struct isp1301 *isp)
921 {
922 if (!otg_dev)
923 return;
924 free_irq(otg_dev->resource[1].start, isp);
925 }
926
927 #else
928
929 /* OTG controller isn't clocked */
930
931 #endif /* CONFIG_USB_OTG */
932
933 /*-------------------------------------------------------------------------*/
934
935 static void b_peripheral(struct isp1301 *isp)
936 {
937 OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
938 usb_gadget_vbus_connect(isp->otg.gadget);
939
940 #ifdef CONFIG_USB_OTG
941 enable_vbus_draw(isp, 8);
942 otg_update_isp(isp);
943 #else
944 enable_vbus_draw(isp, 100);
945 /* UDC driver just set OTG_BSESSVLD */
946 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
947 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
948 isp->otg.state = OTG_STATE_B_PERIPHERAL;
949 pr_debug(" --> b_peripheral\n");
950 dump_regs(isp, "2periph");
951 #endif
952 }
953
954 static void isp_update_otg(struct isp1301 *isp, u8 stat)
955 {
956 u8 isp_stat, isp_bstat;
957 enum usb_otg_state state = isp->otg.state;
958
959 if (stat & INTR_BDIS_ACON)
960 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
961
962 /* start certain state transitions right away */
963 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
964 if (isp_stat & INTR_ID_GND) {
965 if (isp->otg.default_a) {
966 switch (state) {
967 case OTG_STATE_B_IDLE:
968 a_idle(isp, "idle");
969 /* FALLTHROUGH */
970 case OTG_STATE_A_IDLE:
971 enable_vbus_source(isp);
972 /* FALLTHROUGH */
973 case OTG_STATE_A_WAIT_VRISE:
974 /* we skip over OTG_STATE_A_WAIT_BCON, since
975 * the HC will transition to A_HOST (or
976 * A_SUSPEND!) without our noticing except
977 * when HNP is used.
978 */
979 if (isp_stat & INTR_VBUS_VLD)
980 isp->otg.state = OTG_STATE_A_HOST;
981 break;
982 case OTG_STATE_A_WAIT_VFALL:
983 if (!(isp_stat & INTR_SESS_VLD))
984 a_idle(isp, "vfell");
985 break;
986 default:
987 if (!(isp_stat & INTR_VBUS_VLD))
988 isp->otg.state = OTG_STATE_A_VBUS_ERR;
989 break;
990 }
991 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
992 } else {
993 switch (state) {
994 case OTG_STATE_B_PERIPHERAL:
995 case OTG_STATE_B_HOST:
996 case OTG_STATE_B_WAIT_ACON:
997 usb_gadget_vbus_disconnect(isp->otg.gadget);
998 break;
999 default:
1000 break;
1001 }
1002 if (state != OTG_STATE_A_IDLE)
1003 a_idle(isp, "id");
1004 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1005 isp1301_defer_work(isp, WORK_HOST_RESUME);
1006 isp_bstat = 0;
1007 }
1008 } else {
1009 /* if user unplugged mini-A end of cable,
1010 * don't bypass A_WAIT_VFALL.
1011 */
1012 if (isp->otg.default_a) {
1013 switch (state) {
1014 default:
1015 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1016 break;
1017 case OTG_STATE_A_WAIT_VFALL:
1018 state = OTG_STATE_A_IDLE;
1019 /* khubd may take a while to notice and
1020 * handle this disconnect, so don't go
1021 * to B_IDLE quite yet.
1022 */
1023 break;
1024 case OTG_STATE_A_IDLE:
1025 host_suspend(isp);
1026 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1027 MC1_BDIS_ACON_EN);
1028 isp->otg.state = OTG_STATE_B_IDLE;
1029 OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK
1030 & ~OTG_CTRL_BITS;
1031 break;
1032 case OTG_STATE_B_IDLE:
1033 break;
1034 }
1035 }
1036 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1037
1038 switch (isp->otg.state) {
1039 case OTG_STATE_B_PERIPHERAL:
1040 case OTG_STATE_B_WAIT_ACON:
1041 case OTG_STATE_B_HOST:
1042 if (likely(isp_bstat & OTG_B_SESS_VLD))
1043 break;
1044 enable_vbus_draw(isp, 0);
1045 #ifndef CONFIG_USB_OTG
1046 /* UDC driver will clear OTG_BSESSVLD */
1047 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1048 OTG1_DP_PULLDOWN);
1049 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1050 OTG1_DP_PULLUP);
1051 dump_regs(isp, __FUNCTION__);
1052 #endif
1053 /* FALLTHROUGH */
1054 case OTG_STATE_B_SRP_INIT:
1055 b_idle(isp, __FUNCTION__);
1056 OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
1057 /* FALLTHROUGH */
1058 case OTG_STATE_B_IDLE:
1059 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1060 #ifdef CONFIG_USB_OTG
1061 update_otg1(isp, isp_stat);
1062 update_otg2(isp, isp_bstat);
1063 #endif
1064 b_peripheral(isp);
1065 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1066 isp_bstat |= OTG_B_SESS_END;
1067 break;
1068 case OTG_STATE_A_WAIT_VFALL:
1069 break;
1070 default:
1071 pr_debug("otg: unsupported b-device %s\n",
1072 state_name(isp));
1073 break;
1074 }
1075 }
1076
1077 if (state != isp->otg.state)
1078 pr_debug(" isp, %s -> %s\n",
1079 state_string(state), state_name(isp));
1080
1081 #ifdef CONFIG_USB_OTG
1082 /* update the OTG controller state to match the isp1301; may
1083 * trigger OPRT_CHG irqs for changes going to the isp1301.
1084 */
1085 update_otg1(isp, isp_stat);
1086 update_otg2(isp, isp_bstat);
1087 check_state(isp, __FUNCTION__);
1088 #endif
1089
1090 dump_regs(isp, "isp1301->otg");
1091 }
1092
1093 /*-------------------------------------------------------------------------*/
1094
1095 static u8 isp1301_clear_latch(struct isp1301 *isp)
1096 {
1097 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1098 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1099 return latch;
1100 }
1101
1102 static void
1103 isp1301_work(void *data)
1104 {
1105 struct isp1301 *isp = data;
1106 int stop;
1107
1108 /* implicit lock: we're the only task using this device */
1109 isp->working = 1;
1110 do {
1111 stop = test_bit(WORK_STOP, &isp->todo);
1112
1113 #ifdef CONFIG_USB_OTG
1114 /* transfer state from otg engine to isp1301 */
1115 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1116 otg_update_isp(isp);
1117 put_device(&isp->client.dev);
1118 }
1119 #endif
1120 /* transfer state from isp1301 to otg engine */
1121 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1122 u8 stat = isp1301_clear_latch(isp);
1123
1124 isp_update_otg(isp, stat);
1125 put_device(&isp->client.dev);
1126 }
1127
1128 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1129 u32 otg_ctrl;
1130
1131 /*
1132 * skip A_WAIT_VRISE; hc transitions invisibly
1133 * skip A_WAIT_BCON; same.
1134 */
1135 switch (isp->otg.state) {
1136 case OTG_STATE_A_WAIT_BCON:
1137 case OTG_STATE_A_WAIT_VRISE:
1138 isp->otg.state = OTG_STATE_A_HOST;
1139 pr_debug(" --> a_host\n");
1140 otg_ctrl = OTG_CTRL_REG;
1141 otg_ctrl |= OTG_A_BUSREQ;
1142 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1143 & OTG_CTRL_MASK;
1144 OTG_CTRL_REG = otg_ctrl;
1145 break;
1146 case OTG_STATE_B_WAIT_ACON:
1147 isp->otg.state = OTG_STATE_B_HOST;
1148 pr_debug(" --> b_host (acon)\n");
1149 break;
1150 case OTG_STATE_B_HOST:
1151 case OTG_STATE_B_IDLE:
1152 case OTG_STATE_A_IDLE:
1153 break;
1154 default:
1155 pr_debug(" host resume in %s\n",
1156 state_name(isp));
1157 }
1158 host_resume(isp);
1159 // mdelay(10);
1160 put_device(&isp->client.dev);
1161 }
1162
1163 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1164 #ifdef VERBOSE
1165 dump_regs(isp, "timer");
1166 if (!stop)
1167 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1168 #endif
1169 put_device(&isp->client.dev);
1170 }
1171
1172 if (isp->todo)
1173 dev_vdbg(&isp->client.dev,
1174 "work done, todo = 0x%lx\n",
1175 isp->todo);
1176 if (stop) {
1177 dev_dbg(&isp->client.dev, "stop\n");
1178 break;
1179 }
1180 } while (isp->todo);
1181 isp->working = 0;
1182 }
1183
1184 static irqreturn_t isp1301_irq(int irq, void *isp)
1185 {
1186 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1187 return IRQ_HANDLED;
1188 }
1189
1190 static void isp1301_timer(unsigned long _isp)
1191 {
1192 isp1301_defer_work((void *)_isp, WORK_TIMER);
1193 }
1194
1195 /*-------------------------------------------------------------------------*/
1196
1197 static void isp1301_release(struct device *dev)
1198 {
1199 struct isp1301 *isp;
1200
1201 isp = container_of(dev, struct isp1301, client.dev);
1202
1203 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1204 if (isp->i2c_release)
1205 isp->i2c_release(dev);
1206 kfree (isp);
1207 }
1208
1209 static struct isp1301 *the_transceiver;
1210
1211 static int isp1301_detach_client(struct i2c_client *i2c)
1212 {
1213 struct isp1301 *isp;
1214
1215 isp = container_of(i2c, struct isp1301, client);
1216
1217 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1218 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1219 free_irq(isp->irq, isp);
1220 #ifdef CONFIG_USB_OTG
1221 otg_unbind(isp);
1222 #endif
1223 if (machine_is_omap_h2())
1224 omap_free_gpio(2);
1225
1226 isp->timer.data = 0;
1227 set_bit(WORK_STOP, &isp->todo);
1228 del_timer_sync(&isp->timer);
1229 flush_scheduled_work();
1230
1231 put_device(&i2c->dev);
1232 the_transceiver = 0;
1233
1234 return i2c_detach_client(i2c);
1235 }
1236
1237 /*-------------------------------------------------------------------------*/
1238
1239 /* NOTE: three modes are possible here, only one of which
1240 * will be standards-conformant on any given system:
1241 *
1242 * - OTG mode (dual-role), required if there's a Mini-AB connector
1243 * - HOST mode, for when there's one or more A (host) connectors
1244 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1245 *
1246 * As a rule, you won't have an isp1301 chip unless it's there to
1247 * support the OTG mode. Other modes help testing USB controllers
1248 * in isolation from (full) OTG support, or maybe so later board
1249 * revisions can help to support those feature.
1250 */
1251
1252 #ifdef CONFIG_USB_OTG
1253
1254 static int isp1301_otg_enable(struct isp1301 *isp)
1255 {
1256 power_up(isp);
1257 otg_init(isp);
1258
1259 /* NOTE: since we don't change this, this provides
1260 * a few more interrupts than are strictly needed.
1261 */
1262 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1263 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1264 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1265 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1266
1267 dev_info(&isp->client.dev, "ready for dual-role USB ...\n");
1268
1269 return 0;
1270 }
1271
1272 #endif
1273
1274 /* add or disable the host device+driver */
1275 static int
1276 isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
1277 {
1278 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1279
1280 if (!otg || isp != the_transceiver)
1281 return -ENODEV;
1282
1283 if (!host) {
1284 OTG_IRQ_EN_REG = 0;
1285 power_down(isp);
1286 isp->otg.host = 0;
1287 return 0;
1288 }
1289
1290 #ifdef CONFIG_USB_OTG
1291 isp->otg.host = host;
1292 dev_dbg(&isp->client.dev, "registered host\n");
1293 host_suspend(isp);
1294 if (isp->otg.gadget)
1295 return isp1301_otg_enable(isp);
1296 return 0;
1297
1298 #elif !defined(CONFIG_USB_GADGET_OMAP)
1299 // FIXME update its refcount
1300 isp->otg.host = host;
1301
1302 power_up(isp);
1303
1304 if (machine_is_omap_h2())
1305 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1306
1307 dev_info(&isp->client.dev, "A-Host sessions ok\n");
1308 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1309 INTR_ID_GND);
1310 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1311 INTR_ID_GND);
1312
1313 /* If this has a Mini-AB connector, this mode is highly
1314 * nonstandard ... but can be handy for testing, especially with
1315 * the Mini-A end of an OTG cable. (Or something nonstandard
1316 * like MiniB-to-StandardB, maybe built with a gender mender.)
1317 */
1318 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1319
1320 dump_regs(isp, __FUNCTION__);
1321
1322 return 0;
1323
1324 #else
1325 dev_dbg(&isp->client.dev, "host sessions not allowed\n");
1326 return -EINVAL;
1327 #endif
1328
1329 }
1330
1331 static int
1332 isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1333 {
1334 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1335
1336 if (!otg || isp != the_transceiver)
1337 return -ENODEV;
1338
1339 if (!gadget) {
1340 OTG_IRQ_EN_REG = 0;
1341 if (!isp->otg.default_a)
1342 enable_vbus_draw(isp, 0);
1343 usb_gadget_vbus_disconnect(isp->otg.gadget);
1344 isp->otg.gadget = 0;
1345 power_down(isp);
1346 return 0;
1347 }
1348
1349 #ifdef CONFIG_USB_OTG
1350 isp->otg.gadget = gadget;
1351 dev_dbg(&isp->client.dev, "registered gadget\n");
1352 /* gadget driver may be suspended until vbus_connect () */
1353 if (isp->otg.host)
1354 return isp1301_otg_enable(isp);
1355 return 0;
1356
1357 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1358 isp->otg.gadget = gadget;
1359 // FIXME update its refcount
1360
1361 OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK
1362 & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS))
1363 | OTG_ID;
1364 power_up(isp);
1365 isp->otg.state = OTG_STATE_B_IDLE;
1366
1367 if (machine_is_omap_h2())
1368 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1369
1370 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1371 INTR_SESS_VLD);
1372 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1373 INTR_VBUS_VLD);
1374 dev_info(&isp->client.dev, "B-Peripheral sessions ok\n");
1375 dump_regs(isp, __FUNCTION__);
1376
1377 /* If this has a Mini-AB connector, this mode is highly
1378 * nonstandard ... but can be handy for testing, so long
1379 * as you don't plug a Mini-A cable into the jack.
1380 */
1381 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1382 b_peripheral(isp);
1383
1384 return 0;
1385
1386 #else
1387 dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n");
1388 return -EINVAL;
1389 #endif
1390 }
1391
1392
1393 /*-------------------------------------------------------------------------*/
1394
1395 static int
1396 isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1397 {
1398 if (!the_transceiver)
1399 return -ENODEV;
1400 if (dev->state == OTG_STATE_B_PERIPHERAL)
1401 enable_vbus_draw(the_transceiver, mA);
1402 return 0;
1403 }
1404
1405 static int
1406 isp1301_start_srp(struct otg_transceiver *dev)
1407 {
1408 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1409 u32 otg_ctrl;
1410
1411 if (!dev || isp != the_transceiver
1412 || isp->otg.state != OTG_STATE_B_IDLE)
1413 return -ENODEV;
1414
1415 otg_ctrl = OTG_CTRL_REG;
1416 if (!(otg_ctrl & OTG_BSESSEND))
1417 return -EINVAL;
1418
1419 otg_ctrl |= OTG_B_BUSREQ;
1420 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1421 OTG_CTRL_REG = otg_ctrl;
1422 isp->otg.state = OTG_STATE_B_SRP_INIT;
1423
1424 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG);
1425 #ifdef CONFIG_USB_OTG
1426 check_state(isp, __FUNCTION__);
1427 #endif
1428 return 0;
1429 }
1430
1431 static int
1432 isp1301_start_hnp(struct otg_transceiver *dev)
1433 {
1434 #ifdef CONFIG_USB_OTG
1435 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1436
1437 if (!dev || isp != the_transceiver)
1438 return -ENODEV;
1439 if (isp->otg.default_a && (isp->otg.host == NULL
1440 || !isp->otg.host->b_hnp_enable))
1441 return -ENOTCONN;
1442 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1443 || !isp->otg.gadget->b_hnp_enable))
1444 return -ENOTCONN;
1445
1446 /* We want hardware to manage most HNP protocol timings.
1447 * So do this part as early as possible...
1448 */
1449 switch (isp->otg.state) {
1450 case OTG_STATE_B_HOST:
1451 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1452 /* caller will suspend next */
1453 break;
1454 case OTG_STATE_A_HOST:
1455 #if 0
1456 /* autoconnect mode avoids irq latency bugs */
1457 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1458 MC1_BDIS_ACON_EN);
1459 #endif
1460 /* caller must suspend then clear A_BUSREQ */
1461 usb_gadget_vbus_connect(isp->otg.gadget);
1462 OTG_CTRL_REG |= OTG_A_SETB_HNPEN;
1463
1464 break;
1465 case OTG_STATE_A_PERIPHERAL:
1466 /* initiated by B-Host suspend */
1467 break;
1468 default:
1469 return -EILSEQ;
1470 }
1471 pr_debug("otg: HNP %s, %06x ...\n",
1472 state_name(isp), OTG_CTRL_REG);
1473 check_state(isp, __FUNCTION__);
1474 return 0;
1475 #else
1476 /* srp-only */
1477 return -EINVAL;
1478 #endif
1479 }
1480
1481 /*-------------------------------------------------------------------------*/
1482
1483 /* no error returns, they'd just make bus scanning stop */
1484 static int isp1301_probe(struct i2c_adapter *bus, int address, int kind)
1485 {
1486 int status;
1487 struct isp1301 *isp;
1488 struct i2c_client *i2c;
1489
1490 if (the_transceiver)
1491 return 0;
1492
1493 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1494 if (!isp)
1495 return 0;
1496
1497 INIT_WORK(&isp->work, isp1301_work, isp);
1498 init_timer(&isp->timer);
1499 isp->timer.function = isp1301_timer;
1500 isp->timer.data = (unsigned long) isp;
1501
1502 isp->irq = -1;
1503 isp->client.addr = address;
1504 i2c_set_clientdata(&isp->client, isp);
1505 isp->client.adapter = bus;
1506 isp->client.driver = &isp1301_driver;
1507 strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE);
1508 i2c = &isp->client;
1509
1510 /* if this is a true probe, verify the chip ... */
1511 if (kind < 0) {
1512 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1513 if (status != I2C_VENDOR_ID_PHILIPS) {
1514 dev_dbg(&bus->dev, "addr %d not philips id: %d\n",
1515 address, status);
1516 goto fail1;
1517 }
1518 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1519 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1520 dev_dbg(&bus->dev, "%d not isp1301, %d\n",
1521 address, status);
1522 goto fail1;
1523 }
1524 }
1525
1526 status = i2c_attach_client(i2c);
1527 if (status < 0) {
1528 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
1529 DRIVER_NAME, address, status);
1530 fail1:
1531 kfree(isp);
1532 return 0;
1533 }
1534 isp->i2c_release = i2c->dev.release;
1535 i2c->dev.release = isp1301_release;
1536
1537 /* initial development used chiprev 2.00 */
1538 status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
1539 dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1540 status >> 8, status & 0xff);
1541
1542 /* make like power-on reset */
1543 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1544
1545 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1546 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1547
1548 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1549 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1550 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1551 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1552
1553 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1554 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1555 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1556
1557 #ifdef CONFIG_USB_OTG
1558 status = otg_bind(isp);
1559 if (status < 0) {
1560 dev_dbg(&i2c->dev, "can't bind OTG\n");
1561 goto fail2;
1562 }
1563 #endif
1564
1565 if (machine_is_omap_h2()) {
1566 /* full speed signaling by default */
1567 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1568 MC1_SPEED_REG);
1569 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
1570 MC2_SPD_SUSP_CTRL);
1571
1572 /* IRQ wired at M14 */
1573 omap_cfg_reg(M14_1510_GPIO2);
1574 isp->irq = OMAP_GPIO_IRQ(2);
1575 omap_request_gpio(2);
1576 omap_set_gpio_direction(2, 1);
1577 omap_set_gpio_edge_ctrl(2, OMAP_GPIO_FALLING_EDGE);
1578 }
1579
1580 status = request_irq(isp->irq, isp1301_irq,
1581 IRQF_SAMPLE_RANDOM, DRIVER_NAME, isp);
1582 if (status < 0) {
1583 dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1584 isp->irq, status);
1585 #ifdef CONFIG_USB_OTG
1586 fail2:
1587 #endif
1588 i2c_detach_client(i2c);
1589 goto fail1;
1590 }
1591
1592 isp->otg.dev = &isp->client.dev;
1593 isp->otg.label = DRIVER_NAME;
1594
1595 isp->otg.set_host = isp1301_set_host,
1596 isp->otg.set_peripheral = isp1301_set_peripheral,
1597 isp->otg.set_power = isp1301_set_power,
1598 isp->otg.start_srp = isp1301_start_srp,
1599 isp->otg.start_hnp = isp1301_start_hnp,
1600
1601 enable_vbus_draw(isp, 0);
1602 power_down(isp);
1603 the_transceiver = isp;
1604
1605 #ifdef CONFIG_USB_OTG
1606 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1607 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1608 #endif
1609
1610 dump_regs(isp, __FUNCTION__);
1611
1612 #ifdef VERBOSE
1613 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1614 dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1615 #endif
1616
1617 status = otg_set_transceiver(&isp->otg);
1618 if (status < 0)
1619 dev_err(&i2c->dev, "can't register transceiver, %d\n",
1620 status);
1621
1622 return 0;
1623 }
1624
1625 static int isp1301_scan_bus(struct i2c_adapter *bus)
1626 {
1627 if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA
1628 | I2C_FUNC_SMBUS_READ_WORD_DATA))
1629 return -EINVAL;
1630 return i2c_probe(bus, &addr_data, isp1301_probe);
1631 }
1632
1633 static struct i2c_driver isp1301_driver = {
1634 .driver = {
1635 .name = "isp1301_omap",
1636 },
1637 .attach_adapter = isp1301_scan_bus,
1638 .detach_client = isp1301_detach_client,
1639 };
1640
1641 /*-------------------------------------------------------------------------*/
1642
1643 static int __init isp_init(void)
1644 {
1645 return i2c_add_driver(&isp1301_driver);
1646 }
1647 module_init(isp_init);
1648
1649 static void __exit isp_exit(void)
1650 {
1651 if (the_transceiver)
1652 otg_set_transceiver(0);
1653 i2c_del_driver(&isp1301_driver);
1654 }
1655 module_exit(isp_exit);
1656
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