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[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / i2c / chips / isp1301_omap.c
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/usb/ch9.h>
29 #include <linux/usb/gadget.h>
30 #include <linux/usb.h>
31 #include <linux/usb/otg.h>
32 #include <linux/i2c.h>
33 #include <linux/workqueue.h>
34
35 #include <asm/irq.h>
36 #include <mach/usb.h>
37
38
39 #ifndef DEBUG
40 #undef VERBOSE
41 #endif
42
43
44 #define DRIVER_VERSION "24 August 2004"
45 #define DRIVER_NAME (isp1301_driver.driver.name)
46
47 MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
48 MODULE_LICENSE("GPL");
49
50 struct isp1301 {
51 struct otg_transceiver otg;
52 struct i2c_client client;
53 void (*i2c_release)(struct device *dev);
54
55 int irq;
56 int irq_type;
57
58 u32 last_otg_ctrl;
59 unsigned working:1;
60
61 struct timer_list timer;
62
63 /* use keventd context to change the state for us */
64 struct work_struct work;
65
66 unsigned long todo;
67 # define WORK_UPDATE_ISP 0 /* update ISP from OTG */
68 # define WORK_UPDATE_OTG 1 /* update OTG from ISP */
69 # define WORK_HOST_RESUME 4 /* resume host */
70 # define WORK_TIMER 6 /* timer fired */
71 # define WORK_STOP 7 /* don't resubmit */
72 };
73
74
75 /* bits in OTG_CTRL */
76
77 #define OTG_XCEIV_OUTPUTS \
78 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
79 #define OTG_XCEIV_INPUTS \
80 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
81 #define OTG_CTRL_BITS \
82 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
83 /* and OTG_PULLUP is sometimes written */
84
85 #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
86 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
87 OTG_CTRL_BITS)
88
89
90 /*-------------------------------------------------------------------------*/
91
92 #ifdef CONFIG_MACH_OMAP_H2
93
94 /* board-specific PM hooks */
95
96 #include <asm/gpio.h>
97 #include <mach/mux.h>
98 #include <asm/mach-types.h>
99
100
101 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
102
103 #include <linux/i2c/tps65010.h>
104
105 #else
106
107 static inline int tps65010_set_vbus_draw(unsigned mA)
108 {
109 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
110 return 0;
111 }
112
113 #endif
114
115 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
116 {
117 int status = tps65010_set_vbus_draw(mA);
118 if (status < 0)
119 pr_debug(" VBUS %d mA error %d\n", mA, status);
120 }
121
122 static void enable_vbus_source(struct isp1301 *isp)
123 {
124 /* this board won't supply more than 8mA vbus power.
125 * some boards can switch a 100ma "unit load" (or more).
126 */
127 }
128
129
130 /* products will deliver OTG messages with LEDs, GUI, etc */
131 static inline void notresponding(struct isp1301 *isp)
132 {
133 printk(KERN_NOTICE "OTG device not responding.\n");
134 }
135
136
137 #endif
138
139 /*-------------------------------------------------------------------------*/
140
141 /* only two addresses possible */
142 #define ISP_BASE 0x2c
143 static unsigned short normal_i2c[] = {
144 ISP_BASE, ISP_BASE + 1,
145 I2C_CLIENT_END };
146
147 I2C_CLIENT_INSMOD;
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 void
347 isp1301_defer_work(struct isp1301 *isp, int work)
348 {
349 int status;
350
351 if (isp && !test_and_set_bit(work, &isp->todo)) {
352 (void) get_device(&isp->client.dev);
353 status = schedule_work(&isp->work);
354 if (!status && !isp->working)
355 dev_vdbg(&isp->client.dev,
356 "work item %d may be lost\n", work);
357 }
358 }
359
360 /* called from irq handlers */
361 static void a_idle(struct isp1301 *isp, const char *tag)
362 {
363 u32 l;
364
365 if (isp->otg.state == OTG_STATE_A_IDLE)
366 return;
367
368 isp->otg.default_a = 1;
369 if (isp->otg.host) {
370 isp->otg.host->is_b_host = 0;
371 host_suspend(isp);
372 }
373 if (isp->otg.gadget) {
374 isp->otg.gadget->is_a_peripheral = 1;
375 gadget_suspend(isp);
376 }
377 isp->otg.state = OTG_STATE_A_IDLE;
378 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
379 omap_writel(l, OTG_CTRL);
380 isp->last_otg_ctrl = l;
381 pr_debug(" --> %s/%s\n", state_name(isp), tag);
382 }
383
384 /* called from irq handlers */
385 static void b_idle(struct isp1301 *isp, const char *tag)
386 {
387 u32 l;
388
389 if (isp->otg.state == OTG_STATE_B_IDLE)
390 return;
391
392 isp->otg.default_a = 0;
393 if (isp->otg.host) {
394 isp->otg.host->is_b_host = 1;
395 host_suspend(isp);
396 }
397 if (isp->otg.gadget) {
398 isp->otg.gadget->is_a_peripheral = 0;
399 gadget_suspend(isp);
400 }
401 isp->otg.state = OTG_STATE_B_IDLE;
402 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
403 omap_writel(l, OTG_CTRL);
404 isp->last_otg_ctrl = l;
405 pr_debug(" --> %s/%s\n", state_name(isp), tag);
406 }
407
408 static void
409 dump_regs(struct isp1301 *isp, const char *label)
410 {
411 #ifdef DEBUG
412 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
413 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
414 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
415
416 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
417 omap_readl(OTG_CTRL), label, state_name(isp),
418 ctrl, status, src);
419 /* mode control and irq enables don't change much */
420 #endif
421 }
422
423 /*-------------------------------------------------------------------------*/
424
425 #ifdef CONFIG_USB_OTG
426
427 /*
428 * The OMAP OTG controller handles most of the OTG state transitions.
429 *
430 * We translate isp1301 outputs (mostly voltage comparator status) into
431 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
432 * flags into isp1301 inputs ... and infer state transitions.
433 */
434
435 #ifdef VERBOSE
436
437 static void check_state(struct isp1301 *isp, const char *tag)
438 {
439 enum usb_otg_state state = OTG_STATE_UNDEFINED;
440 u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
441 unsigned extra = 0;
442
443 switch (fsm) {
444
445 /* default-b */
446 case 0x0:
447 state = OTG_STATE_B_IDLE;
448 break;
449 case 0x3:
450 case 0x7:
451 extra = 1;
452 case 0x1:
453 state = OTG_STATE_B_PERIPHERAL;
454 break;
455 case 0x11:
456 state = OTG_STATE_B_SRP_INIT;
457 break;
458
459 /* extra dual-role default-b states */
460 case 0x12:
461 case 0x13:
462 case 0x16:
463 extra = 1;
464 case 0x17:
465 state = OTG_STATE_B_WAIT_ACON;
466 break;
467 case 0x34:
468 state = OTG_STATE_B_HOST;
469 break;
470
471 /* default-a */
472 case 0x36:
473 state = OTG_STATE_A_IDLE;
474 break;
475 case 0x3c:
476 state = OTG_STATE_A_WAIT_VFALL;
477 break;
478 case 0x7d:
479 state = OTG_STATE_A_VBUS_ERR;
480 break;
481 case 0x9e:
482 case 0x9f:
483 extra = 1;
484 case 0x89:
485 state = OTG_STATE_A_PERIPHERAL;
486 break;
487 case 0xb7:
488 state = OTG_STATE_A_WAIT_VRISE;
489 break;
490 case 0xb8:
491 state = OTG_STATE_A_WAIT_BCON;
492 break;
493 case 0xb9:
494 state = OTG_STATE_A_HOST;
495 break;
496 case 0xba:
497 state = OTG_STATE_A_SUSPEND;
498 break;
499 default:
500 break;
501 }
502 if (isp->otg.state == state && !extra)
503 return;
504 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
505 state_string(state), fsm, state_name(isp),
506 omap_readl(OTG_CTRL));
507 }
508
509 #else
510
511 static inline void check_state(struct isp1301 *isp, const char *tag) { }
512
513 #endif
514
515 /* outputs from ISP1301_INTERRUPT_SOURCE */
516 static void update_otg1(struct isp1301 *isp, u8 int_src)
517 {
518 u32 otg_ctrl;
519
520 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
521 otg_ctrl &= ~OTG_XCEIV_INPUTS;
522 otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
523
524
525 if (int_src & INTR_SESS_VLD)
526 otg_ctrl |= OTG_ASESSVLD;
527 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
528 a_idle(isp, "vfall");
529 otg_ctrl &= ~OTG_CTRL_BITS;
530 }
531 if (int_src & INTR_VBUS_VLD)
532 otg_ctrl |= OTG_VBUSVLD;
533 if (int_src & INTR_ID_GND) { /* default-A */
534 if (isp->otg.state == OTG_STATE_B_IDLE
535 || isp->otg.state == OTG_STATE_UNDEFINED) {
536 a_idle(isp, "init");
537 return;
538 }
539 } else { /* default-B */
540 otg_ctrl |= OTG_ID;
541 if (isp->otg.state == OTG_STATE_A_IDLE
542 || isp->otg.state == OTG_STATE_UNDEFINED) {
543 b_idle(isp, "init");
544 return;
545 }
546 }
547 omap_writel(otg_ctrl, OTG_CTRL);
548 }
549
550 /* outputs from ISP1301_OTG_STATUS */
551 static void update_otg2(struct isp1301 *isp, u8 otg_status)
552 {
553 u32 otg_ctrl;
554
555 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
556 otg_ctrl &= ~OTG_XCEIV_INPUTS;
557 otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
558 if (otg_status & OTG_B_SESS_VLD)
559 otg_ctrl |= OTG_BSESSVLD;
560 else if (otg_status & OTG_B_SESS_END)
561 otg_ctrl |= OTG_BSESSEND;
562 omap_writel(otg_ctrl, OTG_CTRL);
563 }
564
565 /* inputs going to ISP1301 */
566 static void otg_update_isp(struct isp1301 *isp)
567 {
568 u32 otg_ctrl, otg_change;
569 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
570
571 otg_ctrl = omap_readl(OTG_CTRL);
572 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
573 isp->last_otg_ctrl = otg_ctrl;
574 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
575
576 switch (isp->otg.state) {
577 case OTG_STATE_B_IDLE:
578 case OTG_STATE_B_PERIPHERAL:
579 case OTG_STATE_B_SRP_INIT:
580 if (!(otg_ctrl & OTG_PULLUP)) {
581 // if (otg_ctrl & OTG_B_HNPEN) {
582 if (isp->otg.gadget->b_hnp_enable) {
583 isp->otg.state = OTG_STATE_B_WAIT_ACON;
584 pr_debug(" --> b_wait_acon\n");
585 }
586 goto pulldown;
587 }
588 pullup:
589 set |= OTG1_DP_PULLUP;
590 clr |= OTG1_DP_PULLDOWN;
591 break;
592 case OTG_STATE_A_SUSPEND:
593 case OTG_STATE_A_PERIPHERAL:
594 if (otg_ctrl & OTG_PULLUP)
595 goto pullup;
596 /* FALLTHROUGH */
597 // case OTG_STATE_B_WAIT_ACON:
598 default:
599 pulldown:
600 set |= OTG1_DP_PULLDOWN;
601 clr |= OTG1_DP_PULLUP;
602 break;
603 }
604
605 # define toggle(OTG,ISP) do { \
606 if (otg_ctrl & OTG) set |= ISP; \
607 else clr |= ISP; \
608 } while (0)
609
610 if (!(isp->otg.host))
611 otg_ctrl &= ~OTG_DRV_VBUS;
612
613 switch (isp->otg.state) {
614 case OTG_STATE_A_SUSPEND:
615 if (otg_ctrl & OTG_DRV_VBUS) {
616 set |= OTG1_VBUS_DRV;
617 break;
618 }
619 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
620 notresponding(isp);
621
622 /* FALLTHROUGH */
623 case OTG_STATE_A_VBUS_ERR:
624 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
625 pr_debug(" --> a_wait_vfall\n");
626 /* FALLTHROUGH */
627 case OTG_STATE_A_WAIT_VFALL:
628 /* FIXME usbcore thinks port power is still on ... */
629 clr |= OTG1_VBUS_DRV;
630 break;
631 case OTG_STATE_A_IDLE:
632 if (otg_ctrl & OTG_DRV_VBUS) {
633 isp->otg.state = OTG_STATE_A_WAIT_VRISE;
634 pr_debug(" --> a_wait_vrise\n");
635 }
636 /* FALLTHROUGH */
637 default:
638 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
639 }
640
641 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
642 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
643
644 # undef toggle
645
646 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
647 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
648
649 /* HNP switch to host or peripheral; and SRP */
650 if (otg_change & OTG_PULLUP) {
651 u32 l;
652
653 switch (isp->otg.state) {
654 case OTG_STATE_B_IDLE:
655 if (clr & OTG1_DP_PULLUP)
656 break;
657 isp->otg.state = OTG_STATE_B_PERIPHERAL;
658 pr_debug(" --> b_peripheral\n");
659 break;
660 case OTG_STATE_A_SUSPEND:
661 if (clr & OTG1_DP_PULLUP)
662 break;
663 isp->otg.state = OTG_STATE_A_PERIPHERAL;
664 pr_debug(" --> a_peripheral\n");
665 break;
666 default:
667 break;
668 }
669 l = omap_readl(OTG_CTRL);
670 l |= OTG_PULLUP;
671 omap_writel(l, OTG_CTRL);
672 }
673
674 check_state(isp, __func__);
675 dump_regs(isp, "otg->isp1301");
676 }
677
678 static irqreturn_t omap_otg_irq(int irq, void *_isp)
679 {
680 u16 otg_irq = omap_readw(OTG_IRQ_SRC);
681 u32 otg_ctrl;
682 int ret = IRQ_NONE;
683 struct isp1301 *isp = _isp;
684
685 /* update ISP1301 transciever from OTG controller */
686 if (otg_irq & OPRT_CHG) {
687 omap_writew(OPRT_CHG, OTG_IRQ_SRC);
688 isp1301_defer_work(isp, WORK_UPDATE_ISP);
689 ret = IRQ_HANDLED;
690
691 /* SRP to become b_peripheral failed */
692 } else if (otg_irq & B_SRP_TMROUT) {
693 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
694 notresponding(isp);
695
696 /* gadget drivers that care should monitor all kinds of
697 * remote wakeup (SRP, normal) using their own timer
698 * to give "check cable and A-device" messages.
699 */
700 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
701 b_idle(isp, "srp_timeout");
702
703 omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
704 ret = IRQ_HANDLED;
705
706 /* HNP to become b_host failed */
707 } else if (otg_irq & B_HNP_FAIL) {
708 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
709 state_name(isp), omap_readl(OTG_CTRL));
710 notresponding(isp);
711
712 otg_ctrl = omap_readl(OTG_CTRL);
713 otg_ctrl |= OTG_BUSDROP;
714 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
715 omap_writel(otg_ctrl, OTG_CTRL);
716
717 /* subset of b_peripheral()... */
718 isp->otg.state = OTG_STATE_B_PERIPHERAL;
719 pr_debug(" --> b_peripheral\n");
720
721 omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
722 ret = IRQ_HANDLED;
723
724 /* detect SRP from B-device ... */
725 } else if (otg_irq & A_SRP_DETECT) {
726 pr_debug("otg: %s SRP_DETECT, %06x\n",
727 state_name(isp), omap_readl(OTG_CTRL));
728
729 isp1301_defer_work(isp, WORK_UPDATE_OTG);
730 switch (isp->otg.state) {
731 case OTG_STATE_A_IDLE:
732 if (!isp->otg.host)
733 break;
734 isp1301_defer_work(isp, WORK_HOST_RESUME);
735 otg_ctrl = omap_readl(OTG_CTRL);
736 otg_ctrl |= OTG_A_BUSREQ;
737 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
738 & ~OTG_XCEIV_INPUTS
739 & OTG_CTRL_MASK;
740 omap_writel(otg_ctrl, OTG_CTRL);
741 break;
742 default:
743 break;
744 }
745
746 omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
747 ret = IRQ_HANDLED;
748
749 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
750 * we don't track them separately
751 */
752 } else if (otg_irq & A_REQ_TMROUT) {
753 otg_ctrl = omap_readl(OTG_CTRL);
754 pr_info("otg: BCON_TMOUT from %s, %06x\n",
755 state_name(isp), otg_ctrl);
756 notresponding(isp);
757
758 otg_ctrl |= OTG_BUSDROP;
759 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
760 omap_writel(otg_ctrl, OTG_CTRL);
761 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
762
763 omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
764 ret = IRQ_HANDLED;
765
766 /* A-supplied voltage fell too low; overcurrent */
767 } else if (otg_irq & A_VBUS_ERR) {
768 otg_ctrl = omap_readl(OTG_CTRL);
769 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
770 state_name(isp), otg_irq, otg_ctrl);
771
772 otg_ctrl |= OTG_BUSDROP;
773 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
774 omap_writel(otg_ctrl, OTG_CTRL);
775 isp->otg.state = OTG_STATE_A_VBUS_ERR;
776
777 omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
778 ret = IRQ_HANDLED;
779
780 /* switch driver; the transciever code activates it,
781 * ungating the udc clock or resuming OHCI.
782 */
783 } else if (otg_irq & DRIVER_SWITCH) {
784 int kick = 0;
785
786 otg_ctrl = omap_readl(OTG_CTRL);
787 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
788 state_name(isp),
789 (otg_ctrl & OTG_DRIVER_SEL)
790 ? "gadget" : "host",
791 otg_ctrl);
792 isp1301_defer_work(isp, WORK_UPDATE_ISP);
793
794 /* role is peripheral */
795 if (otg_ctrl & OTG_DRIVER_SEL) {
796 switch (isp->otg.state) {
797 case OTG_STATE_A_IDLE:
798 b_idle(isp, __func__);
799 break;
800 default:
801 break;
802 }
803 isp1301_defer_work(isp, WORK_UPDATE_ISP);
804
805 /* role is host */
806 } else {
807 if (!(otg_ctrl & OTG_ID)) {
808 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
809 omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
810 }
811
812 if (isp->otg.host) {
813 switch (isp->otg.state) {
814 case OTG_STATE_B_WAIT_ACON:
815 isp->otg.state = OTG_STATE_B_HOST;
816 pr_debug(" --> b_host\n");
817 kick = 1;
818 break;
819 case OTG_STATE_A_WAIT_BCON:
820 isp->otg.state = OTG_STATE_A_HOST;
821 pr_debug(" --> a_host\n");
822 break;
823 case OTG_STATE_A_PERIPHERAL:
824 isp->otg.state = OTG_STATE_A_WAIT_BCON;
825 pr_debug(" --> a_wait_bcon\n");
826 break;
827 default:
828 break;
829 }
830 isp1301_defer_work(isp, WORK_HOST_RESUME);
831 }
832 }
833
834 omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
835 ret = IRQ_HANDLED;
836
837 if (kick)
838 usb_bus_start_enum(isp->otg.host,
839 isp->otg.host->otg_port);
840 }
841
842 check_state(isp, __func__);
843 return ret;
844 }
845
846 static struct platform_device *otg_dev;
847
848 static int otg_init(struct isp1301 *isp)
849 {
850 u32 l;
851
852 if (!otg_dev)
853 return -ENODEV;
854
855 dump_regs(isp, __func__);
856 /* some of these values are board-specific... */
857 l = omap_readl(OTG_SYSCON_2);
858 l |= OTG_EN
859 /* for B-device: */
860 | SRP_GPDATA /* 9msec Bdev D+ pulse */
861 | SRP_GPDVBUS /* discharge after VBUS pulse */
862 // | (3 << 24) /* 2msec VBUS pulse */
863 /* for A-device: */
864 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
865 | SRP_DPW /* detect 167+ns SRP pulses */
866 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
867 ;
868 omap_writel(l, OTG_SYSCON_2);
869
870 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
871 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
872
873 check_state(isp, __func__);
874 pr_debug("otg: %s, %s %06x\n",
875 state_name(isp), __func__, omap_readl(OTG_CTRL));
876
877 omap_writew(DRIVER_SWITCH | OPRT_CHG
878 | B_SRP_TMROUT | B_HNP_FAIL
879 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
880
881 l = omap_readl(OTG_SYSCON_2);
882 l |= OTG_EN;
883 omap_writel(l, OTG_SYSCON_2);
884
885 return 0;
886 }
887
888 static int otg_probe(struct platform_device *dev)
889 {
890 // struct omap_usb_config *config = dev->platform_data;
891
892 otg_dev = dev;
893 return 0;
894 }
895
896 static int otg_remove(struct platform_device *dev)
897 {
898 otg_dev = 0;
899 return 0;
900 }
901
902 struct platform_driver omap_otg_driver = {
903 .probe = otg_probe,
904 .remove = otg_remove,
905 .driver = {
906 .owner = THIS_MODULE,
907 .name = "omap_otg",
908 },
909 };
910
911 static int otg_bind(struct isp1301 *isp)
912 {
913 int status;
914
915 if (otg_dev)
916 return -EBUSY;
917
918 status = platform_driver_register(&omap_otg_driver);
919 if (status < 0)
920 return status;
921
922 if (otg_dev)
923 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
924 IRQF_DISABLED, DRIVER_NAME, isp);
925 else
926 status = -ENODEV;
927
928 if (status < 0)
929 platform_driver_unregister(&omap_otg_driver);
930 return status;
931 }
932
933 static void otg_unbind(struct isp1301 *isp)
934 {
935 if (!otg_dev)
936 return;
937 free_irq(otg_dev->resource[1].start, isp);
938 }
939
940 #else
941
942 /* OTG controller isn't clocked */
943
944 #endif /* CONFIG_USB_OTG */
945
946 /*-------------------------------------------------------------------------*/
947
948 static void b_peripheral(struct isp1301 *isp)
949 {
950 u32 l;
951
952 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
953 omap_writel(l, OTG_CTRL);
954
955 usb_gadget_vbus_connect(isp->otg.gadget);
956
957 #ifdef CONFIG_USB_OTG
958 enable_vbus_draw(isp, 8);
959 otg_update_isp(isp);
960 #else
961 enable_vbus_draw(isp, 100);
962 /* UDC driver just set OTG_BSESSVLD */
963 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
964 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
965 isp->otg.state = OTG_STATE_B_PERIPHERAL;
966 pr_debug(" --> b_peripheral\n");
967 dump_regs(isp, "2periph");
968 #endif
969 }
970
971 static void isp_update_otg(struct isp1301 *isp, u8 stat)
972 {
973 u8 isp_stat, isp_bstat;
974 enum usb_otg_state state = isp->otg.state;
975
976 if (stat & INTR_BDIS_ACON)
977 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
978
979 /* start certain state transitions right away */
980 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
981 if (isp_stat & INTR_ID_GND) {
982 if (isp->otg.default_a) {
983 switch (state) {
984 case OTG_STATE_B_IDLE:
985 a_idle(isp, "idle");
986 /* FALLTHROUGH */
987 case OTG_STATE_A_IDLE:
988 enable_vbus_source(isp);
989 /* FALLTHROUGH */
990 case OTG_STATE_A_WAIT_VRISE:
991 /* we skip over OTG_STATE_A_WAIT_BCON, since
992 * the HC will transition to A_HOST (or
993 * A_SUSPEND!) without our noticing except
994 * when HNP is used.
995 */
996 if (isp_stat & INTR_VBUS_VLD)
997 isp->otg.state = OTG_STATE_A_HOST;
998 break;
999 case OTG_STATE_A_WAIT_VFALL:
1000 if (!(isp_stat & INTR_SESS_VLD))
1001 a_idle(isp, "vfell");
1002 break;
1003 default:
1004 if (!(isp_stat & INTR_VBUS_VLD))
1005 isp->otg.state = OTG_STATE_A_VBUS_ERR;
1006 break;
1007 }
1008 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1009 } else {
1010 switch (state) {
1011 case OTG_STATE_B_PERIPHERAL:
1012 case OTG_STATE_B_HOST:
1013 case OTG_STATE_B_WAIT_ACON:
1014 usb_gadget_vbus_disconnect(isp->otg.gadget);
1015 break;
1016 default:
1017 break;
1018 }
1019 if (state != OTG_STATE_A_IDLE)
1020 a_idle(isp, "id");
1021 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1022 isp1301_defer_work(isp, WORK_HOST_RESUME);
1023 isp_bstat = 0;
1024 }
1025 } else {
1026 u32 l;
1027
1028 /* if user unplugged mini-A end of cable,
1029 * don't bypass A_WAIT_VFALL.
1030 */
1031 if (isp->otg.default_a) {
1032 switch (state) {
1033 default:
1034 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1035 break;
1036 case OTG_STATE_A_WAIT_VFALL:
1037 state = OTG_STATE_A_IDLE;
1038 /* khubd may take a while to notice and
1039 * handle this disconnect, so don't go
1040 * to B_IDLE quite yet.
1041 */
1042 break;
1043 case OTG_STATE_A_IDLE:
1044 host_suspend(isp);
1045 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1046 MC1_BDIS_ACON_EN);
1047 isp->otg.state = OTG_STATE_B_IDLE;
1048 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1049 l &= ~OTG_CTRL_BITS;
1050 omap_writel(l, OTG_CTRL);
1051 break;
1052 case OTG_STATE_B_IDLE:
1053 break;
1054 }
1055 }
1056 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1057
1058 switch (isp->otg.state) {
1059 case OTG_STATE_B_PERIPHERAL:
1060 case OTG_STATE_B_WAIT_ACON:
1061 case OTG_STATE_B_HOST:
1062 if (likely(isp_bstat & OTG_B_SESS_VLD))
1063 break;
1064 enable_vbus_draw(isp, 0);
1065 #ifndef CONFIG_USB_OTG
1066 /* UDC driver will clear OTG_BSESSVLD */
1067 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1068 OTG1_DP_PULLDOWN);
1069 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1070 OTG1_DP_PULLUP);
1071 dump_regs(isp, __func__);
1072 #endif
1073 /* FALLTHROUGH */
1074 case OTG_STATE_B_SRP_INIT:
1075 b_idle(isp, __func__);
1076 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
1077 omap_writel(l, OTG_CTRL);
1078 /* FALLTHROUGH */
1079 case OTG_STATE_B_IDLE:
1080 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1081 #ifdef CONFIG_USB_OTG
1082 update_otg1(isp, isp_stat);
1083 update_otg2(isp, isp_bstat);
1084 #endif
1085 b_peripheral(isp);
1086 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1087 isp_bstat |= OTG_B_SESS_END;
1088 break;
1089 case OTG_STATE_A_WAIT_VFALL:
1090 break;
1091 default:
1092 pr_debug("otg: unsupported b-device %s\n",
1093 state_name(isp));
1094 break;
1095 }
1096 }
1097
1098 if (state != isp->otg.state)
1099 pr_debug(" isp, %s -> %s\n",
1100 state_string(state), state_name(isp));
1101
1102 #ifdef CONFIG_USB_OTG
1103 /* update the OTG controller state to match the isp1301; may
1104 * trigger OPRT_CHG irqs for changes going to the isp1301.
1105 */
1106 update_otg1(isp, isp_stat);
1107 update_otg2(isp, isp_bstat);
1108 check_state(isp, __func__);
1109 #endif
1110
1111 dump_regs(isp, "isp1301->otg");
1112 }
1113
1114 /*-------------------------------------------------------------------------*/
1115
1116 static u8 isp1301_clear_latch(struct isp1301 *isp)
1117 {
1118 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1119 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1120 return latch;
1121 }
1122
1123 static void
1124 isp1301_work(struct work_struct *work)
1125 {
1126 struct isp1301 *isp = container_of(work, struct isp1301, work);
1127 int stop;
1128
1129 /* implicit lock: we're the only task using this device */
1130 isp->working = 1;
1131 do {
1132 stop = test_bit(WORK_STOP, &isp->todo);
1133
1134 #ifdef CONFIG_USB_OTG
1135 /* transfer state from otg engine to isp1301 */
1136 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1137 otg_update_isp(isp);
1138 put_device(&isp->client.dev);
1139 }
1140 #endif
1141 /* transfer state from isp1301 to otg engine */
1142 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1143 u8 stat = isp1301_clear_latch(isp);
1144
1145 isp_update_otg(isp, stat);
1146 put_device(&isp->client.dev);
1147 }
1148
1149 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1150 u32 otg_ctrl;
1151
1152 /*
1153 * skip A_WAIT_VRISE; hc transitions invisibly
1154 * skip A_WAIT_BCON; same.
1155 */
1156 switch (isp->otg.state) {
1157 case OTG_STATE_A_WAIT_BCON:
1158 case OTG_STATE_A_WAIT_VRISE:
1159 isp->otg.state = OTG_STATE_A_HOST;
1160 pr_debug(" --> a_host\n");
1161 otg_ctrl = omap_readl(OTG_CTRL);
1162 otg_ctrl |= OTG_A_BUSREQ;
1163 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1164 & OTG_CTRL_MASK;
1165 omap_writel(otg_ctrl, OTG_CTRL);
1166 break;
1167 case OTG_STATE_B_WAIT_ACON:
1168 isp->otg.state = OTG_STATE_B_HOST;
1169 pr_debug(" --> b_host (acon)\n");
1170 break;
1171 case OTG_STATE_B_HOST:
1172 case OTG_STATE_B_IDLE:
1173 case OTG_STATE_A_IDLE:
1174 break;
1175 default:
1176 pr_debug(" host resume in %s\n",
1177 state_name(isp));
1178 }
1179 host_resume(isp);
1180 // mdelay(10);
1181 put_device(&isp->client.dev);
1182 }
1183
1184 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1185 #ifdef VERBOSE
1186 dump_regs(isp, "timer");
1187 if (!stop)
1188 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1189 #endif
1190 put_device(&isp->client.dev);
1191 }
1192
1193 if (isp->todo)
1194 dev_vdbg(&isp->client.dev,
1195 "work done, todo = 0x%lx\n",
1196 isp->todo);
1197 if (stop) {
1198 dev_dbg(&isp->client.dev, "stop\n");
1199 break;
1200 }
1201 } while (isp->todo);
1202 isp->working = 0;
1203 }
1204
1205 static irqreturn_t isp1301_irq(int irq, void *isp)
1206 {
1207 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1208 return IRQ_HANDLED;
1209 }
1210
1211 static void isp1301_timer(unsigned long _isp)
1212 {
1213 isp1301_defer_work((void *)_isp, WORK_TIMER);
1214 }
1215
1216 /*-------------------------------------------------------------------------*/
1217
1218 static void isp1301_release(struct device *dev)
1219 {
1220 struct isp1301 *isp;
1221
1222 isp = container_of(dev, struct isp1301, client.dev);
1223
1224 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1225 if (isp->i2c_release)
1226 isp->i2c_release(dev);
1227 kfree (isp);
1228 }
1229
1230 static struct isp1301 *the_transceiver;
1231
1232 static int isp1301_detach_client(struct i2c_client *i2c)
1233 {
1234 struct isp1301 *isp;
1235
1236 isp = container_of(i2c, struct isp1301, client);
1237
1238 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1239 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1240 free_irq(isp->irq, isp);
1241 #ifdef CONFIG_USB_OTG
1242 otg_unbind(isp);
1243 #endif
1244 if (machine_is_omap_h2())
1245 omap_free_gpio(2);
1246
1247 isp->timer.data = 0;
1248 set_bit(WORK_STOP, &isp->todo);
1249 del_timer_sync(&isp->timer);
1250 flush_scheduled_work();
1251
1252 put_device(&i2c->dev);
1253 the_transceiver = 0;
1254
1255 return i2c_detach_client(i2c);
1256 }
1257
1258 /*-------------------------------------------------------------------------*/
1259
1260 /* NOTE: three modes are possible here, only one of which
1261 * will be standards-conformant on any given system:
1262 *
1263 * - OTG mode (dual-role), required if there's a Mini-AB connector
1264 * - HOST mode, for when there's one or more A (host) connectors
1265 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1266 *
1267 * As a rule, you won't have an isp1301 chip unless it's there to
1268 * support the OTG mode. Other modes help testing USB controllers
1269 * in isolation from (full) OTG support, or maybe so later board
1270 * revisions can help to support those feature.
1271 */
1272
1273 #ifdef CONFIG_USB_OTG
1274
1275 static int isp1301_otg_enable(struct isp1301 *isp)
1276 {
1277 power_up(isp);
1278 otg_init(isp);
1279
1280 /* NOTE: since we don't change this, this provides
1281 * a few more interrupts than are strictly needed.
1282 */
1283 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1284 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1285 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1286 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1287
1288 dev_info(&isp->client.dev, "ready for dual-role USB ...\n");
1289
1290 return 0;
1291 }
1292
1293 #endif
1294
1295 /* add or disable the host device+driver */
1296 static int
1297 isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
1298 {
1299 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1300
1301 if (!otg || isp != the_transceiver)
1302 return -ENODEV;
1303
1304 if (!host) {
1305 omap_writew(0, OTG_IRQ_EN);
1306 power_down(isp);
1307 isp->otg.host = 0;
1308 return 0;
1309 }
1310
1311 #ifdef CONFIG_USB_OTG
1312 isp->otg.host = host;
1313 dev_dbg(&isp->client.dev, "registered host\n");
1314 host_suspend(isp);
1315 if (isp->otg.gadget)
1316 return isp1301_otg_enable(isp);
1317 return 0;
1318
1319 #elif !defined(CONFIG_USB_GADGET_OMAP)
1320 // FIXME update its refcount
1321 isp->otg.host = host;
1322
1323 power_up(isp);
1324
1325 if (machine_is_omap_h2())
1326 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1327
1328 dev_info(&isp->client.dev, "A-Host sessions ok\n");
1329 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1330 INTR_ID_GND);
1331 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1332 INTR_ID_GND);
1333
1334 /* If this has a Mini-AB connector, this mode is highly
1335 * nonstandard ... but can be handy for testing, especially with
1336 * the Mini-A end of an OTG cable. (Or something nonstandard
1337 * like MiniB-to-StandardB, maybe built with a gender mender.)
1338 */
1339 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1340
1341 dump_regs(isp, __func__);
1342
1343 return 0;
1344
1345 #else
1346 dev_dbg(&isp->client.dev, "host sessions not allowed\n");
1347 return -EINVAL;
1348 #endif
1349
1350 }
1351
1352 static int
1353 isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1354 {
1355 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1356 u32 l;
1357
1358 if (!otg || isp != the_transceiver)
1359 return -ENODEV;
1360
1361 if (!gadget) {
1362 omap_writew(0, OTG_IRQ_EN);
1363 if (!isp->otg.default_a)
1364 enable_vbus_draw(isp, 0);
1365 usb_gadget_vbus_disconnect(isp->otg.gadget);
1366 isp->otg.gadget = 0;
1367 power_down(isp);
1368 return 0;
1369 }
1370
1371 #ifdef CONFIG_USB_OTG
1372 isp->otg.gadget = gadget;
1373 dev_dbg(&isp->client.dev, "registered gadget\n");
1374 /* gadget driver may be suspended until vbus_connect () */
1375 if (isp->otg.host)
1376 return isp1301_otg_enable(isp);
1377 return 0;
1378
1379 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1380 isp->otg.gadget = gadget;
1381 // FIXME update its refcount
1382
1383 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1384 l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
1385 l |= OTG_ID;
1386 omap_writel(l, OTG_CTRL);
1387
1388 power_up(isp);
1389 isp->otg.state = OTG_STATE_B_IDLE;
1390
1391 if (machine_is_omap_h2())
1392 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1393
1394 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1395 INTR_SESS_VLD);
1396 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1397 INTR_VBUS_VLD);
1398 dev_info(&isp->client.dev, "B-Peripheral sessions ok\n");
1399 dump_regs(isp, __func__);
1400
1401 /* If this has a Mini-AB connector, this mode is highly
1402 * nonstandard ... but can be handy for testing, so long
1403 * as you don't plug a Mini-A cable into the jack.
1404 */
1405 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1406 b_peripheral(isp);
1407
1408 return 0;
1409
1410 #else
1411 dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n");
1412 return -EINVAL;
1413 #endif
1414 }
1415
1416
1417 /*-------------------------------------------------------------------------*/
1418
1419 static int
1420 isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1421 {
1422 if (!the_transceiver)
1423 return -ENODEV;
1424 if (dev->state == OTG_STATE_B_PERIPHERAL)
1425 enable_vbus_draw(the_transceiver, mA);
1426 return 0;
1427 }
1428
1429 static int
1430 isp1301_start_srp(struct otg_transceiver *dev)
1431 {
1432 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1433 u32 otg_ctrl;
1434
1435 if (!dev || isp != the_transceiver
1436 || isp->otg.state != OTG_STATE_B_IDLE)
1437 return -ENODEV;
1438
1439 otg_ctrl = omap_readl(OTG_CTRL);
1440 if (!(otg_ctrl & OTG_BSESSEND))
1441 return -EINVAL;
1442
1443 otg_ctrl |= OTG_B_BUSREQ;
1444 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1445 omap_writel(otg_ctrl, OTG_CTRL);
1446 isp->otg.state = OTG_STATE_B_SRP_INIT;
1447
1448 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
1449 omap_readl(OTG_CTRL));
1450 #ifdef CONFIG_USB_OTG
1451 check_state(isp, __func__);
1452 #endif
1453 return 0;
1454 }
1455
1456 static int
1457 isp1301_start_hnp(struct otg_transceiver *dev)
1458 {
1459 #ifdef CONFIG_USB_OTG
1460 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1461 u32 l;
1462
1463 if (!dev || isp != the_transceiver)
1464 return -ENODEV;
1465 if (isp->otg.default_a && (isp->otg.host == NULL
1466 || !isp->otg.host->b_hnp_enable))
1467 return -ENOTCONN;
1468 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1469 || !isp->otg.gadget->b_hnp_enable))
1470 return -ENOTCONN;
1471
1472 /* We want hardware to manage most HNP protocol timings.
1473 * So do this part as early as possible...
1474 */
1475 switch (isp->otg.state) {
1476 case OTG_STATE_B_HOST:
1477 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1478 /* caller will suspend next */
1479 break;
1480 case OTG_STATE_A_HOST:
1481 #if 0
1482 /* autoconnect mode avoids irq latency bugs */
1483 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1484 MC1_BDIS_ACON_EN);
1485 #endif
1486 /* caller must suspend then clear A_BUSREQ */
1487 usb_gadget_vbus_connect(isp->otg.gadget);
1488 l = omap_readl(OTG_CTRL);
1489 l |= OTG_A_SETB_HNPEN;
1490 omap_writel(l, OTG_CTRL);
1491
1492 break;
1493 case OTG_STATE_A_PERIPHERAL:
1494 /* initiated by B-Host suspend */
1495 break;
1496 default:
1497 return -EILSEQ;
1498 }
1499 pr_debug("otg: HNP %s, %06x ...\n",
1500 state_name(isp), omap_readl(OTG_CTRL));
1501 check_state(isp, __func__);
1502 return 0;
1503 #else
1504 /* srp-only */
1505 return -EINVAL;
1506 #endif
1507 }
1508
1509 /*-------------------------------------------------------------------------*/
1510
1511 /* no error returns, they'd just make bus scanning stop */
1512 static int isp1301_probe(struct i2c_adapter *bus, int address, int kind)
1513 {
1514 int status;
1515 struct isp1301 *isp;
1516 struct i2c_client *i2c;
1517
1518 if (the_transceiver)
1519 return 0;
1520
1521 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1522 if (!isp)
1523 return 0;
1524
1525 INIT_WORK(&isp->work, isp1301_work);
1526 init_timer(&isp->timer);
1527 isp->timer.function = isp1301_timer;
1528 isp->timer.data = (unsigned long) isp;
1529
1530 isp->irq = -1;
1531 isp->client.addr = address;
1532 i2c_set_clientdata(&isp->client, isp);
1533 isp->client.adapter = bus;
1534 isp->client.driver = &isp1301_driver;
1535 strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE);
1536 i2c = &isp->client;
1537
1538 /* if this is a true probe, verify the chip ... */
1539 if (kind < 0) {
1540 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1541 if (status != I2C_VENDOR_ID_PHILIPS) {
1542 dev_dbg(&bus->dev, "addr %d not philips id: %d\n",
1543 address, status);
1544 goto fail1;
1545 }
1546 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1547 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1548 dev_dbg(&bus->dev, "%d not isp1301, %d\n",
1549 address, status);
1550 goto fail1;
1551 }
1552 }
1553
1554 status = i2c_attach_client(i2c);
1555 if (status < 0) {
1556 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
1557 DRIVER_NAME, address, status);
1558 fail1:
1559 kfree(isp);
1560 return 0;
1561 }
1562 isp->i2c_release = i2c->dev.release;
1563 i2c->dev.release = isp1301_release;
1564
1565 /* initial development used chiprev 2.00 */
1566 status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
1567 dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1568 status >> 8, status & 0xff);
1569
1570 /* make like power-on reset */
1571 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1572
1573 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1574 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1575
1576 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1577 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1578 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1579 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1580
1581 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1582 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1583 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1584
1585 #ifdef CONFIG_USB_OTG
1586 status = otg_bind(isp);
1587 if (status < 0) {
1588 dev_dbg(&i2c->dev, "can't bind OTG\n");
1589 goto fail2;
1590 }
1591 #endif
1592
1593 if (machine_is_omap_h2()) {
1594 /* full speed signaling by default */
1595 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1596 MC1_SPEED_REG);
1597 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
1598 MC2_SPD_SUSP_CTRL);
1599
1600 /* IRQ wired at M14 */
1601 omap_cfg_reg(M14_1510_GPIO2);
1602 isp->irq = OMAP_GPIO_IRQ(2);
1603 if (gpio_request(2, "isp1301") == 0)
1604 gpio_direction_input(2);
1605 isp->irq_type = IRQF_TRIGGER_FALLING;
1606 }
1607
1608 isp->irq_type |= IRQF_SAMPLE_RANDOM;
1609 status = request_irq(isp->irq, isp1301_irq,
1610 isp->irq_type, DRIVER_NAME, isp);
1611 if (status < 0) {
1612 dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1613 isp->irq, status);
1614 #ifdef CONFIG_USB_OTG
1615 fail2:
1616 #endif
1617 i2c_detach_client(i2c);
1618 goto fail1;
1619 }
1620
1621 isp->otg.dev = &isp->client.dev;
1622 isp->otg.label = DRIVER_NAME;
1623
1624 isp->otg.set_host = isp1301_set_host,
1625 isp->otg.set_peripheral = isp1301_set_peripheral,
1626 isp->otg.set_power = isp1301_set_power,
1627 isp->otg.start_srp = isp1301_start_srp,
1628 isp->otg.start_hnp = isp1301_start_hnp,
1629
1630 enable_vbus_draw(isp, 0);
1631 power_down(isp);
1632 the_transceiver = isp;
1633
1634 #ifdef CONFIG_USB_OTG
1635 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1636 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1637 #endif
1638
1639 dump_regs(isp, __func__);
1640
1641 #ifdef VERBOSE
1642 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1643 dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1644 #endif
1645
1646 status = otg_set_transceiver(&isp->otg);
1647 if (status < 0)
1648 dev_err(&i2c->dev, "can't register transceiver, %d\n",
1649 status);
1650
1651 return 0;
1652 }
1653
1654 static int isp1301_scan_bus(struct i2c_adapter *bus)
1655 {
1656 if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA
1657 | I2C_FUNC_SMBUS_READ_WORD_DATA))
1658 return -EINVAL;
1659 return i2c_probe(bus, &addr_data, isp1301_probe);
1660 }
1661
1662 static struct i2c_driver isp1301_driver = {
1663 .driver = {
1664 .name = "isp1301_omap",
1665 },
1666 .attach_adapter = isp1301_scan_bus,
1667 .detach_client = isp1301_detach_client,
1668 };
1669
1670 /*-------------------------------------------------------------------------*/
1671
1672 static int __init isp_init(void)
1673 {
1674 return i2c_add_driver(&isp1301_driver);
1675 }
1676 module_init(isp_init);
1677
1678 static void __exit isp_exit(void)
1679 {
1680 if (the_transceiver)
1681 otg_set_transceiver(0);
1682 i2c_del_driver(&isp1301_driver);
1683 }
1684 module_exit(isp_exit);
1685
kernel source for telekom puls (alcatel/mediatek)