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8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/interrupt.h>
14#include <linux/platform_device.h>
15#include <linux/gpio.h>
16#include <linux/usb/ch9.h>
17#include <linux/usb/gadget.h>
18#include <linux/usb.h>
19#include <linux/usb/otg.h>
20#include <linux/i2c.h>
21#include <linux/workqueue.h>
22
23#include <asm/irq.h>
24#include <asm/mach-types.h>
25
26#include <mach/mux.h>
27
28#include <mach/usb.h>
29
30#undef VERBOSE
31
32
33#define DRIVER_VERSION "24 August 2004"
34#define DRIVER_NAME (isp1301_driver.driver.name)
35
36MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
37MODULE_LICENSE("GPL");
38
39struct isp1301 {
40 struct usb_phy phy;
41 struct i2c_client *client;
42 void (*i2c_release)(struct device *dev);
43
44 int irq_type;
45
46 u32 last_otg_ctrl;
47 unsigned working:1;
48
49 struct timer_list timer;
50
51
52 struct work_struct work;
53
54 unsigned long todo;
55# define WORK_UPDATE_ISP 0
56# define WORK_UPDATE_OTG 1
57# define WORK_HOST_RESUME 4
58# define WORK_TIMER 6
59# define WORK_STOP 7
60};
61
62
63
64
65#define OTG_XCEIV_OUTPUTS \
66 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
67#define OTG_XCEIV_INPUTS \
68 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
69#define OTG_CTRL_BITS \
70 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
71
72
73#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
74 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
75 OTG_CTRL_BITS)
76
77
78
79
80
81
82#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
83
84#if IS_REACHABLE(CONFIG_TPS65010)
85
86#include <linux/mfd/tps65010.h>
87
88#else
89
90static inline int tps65010_set_vbus_draw(unsigned mA)
91{
92 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
93 return 0;
94}
95
96#endif
97
98static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
99{
100 int status = tps65010_set_vbus_draw(mA);
101 if (status < 0)
102 pr_debug(" VBUS %d mA error %d\n", mA, status);
103}
104
105#else
106
107static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
108{
109
110
111
112
113}
114
115#endif
116
117static void enable_vbus_source(struct isp1301 *isp)
118{
119
120
121
122}
123
124
125
126static inline void notresponding(struct isp1301 *isp)
127{
128 printk(KERN_NOTICE "OTG device not responding.\n");
129}
130
131
132
133
134static struct i2c_driver isp1301_driver;
135
136
137
138static inline u8
139isp1301_get_u8(struct isp1301 *isp, u8 reg)
140{
141 return i2c_smbus_read_byte_data(isp->client, reg + 0);
142}
143
144static inline int
145isp1301_get_u16(struct isp1301 *isp, u8 reg)
146{
147 return i2c_smbus_read_word_data(isp->client, reg);
148}
149
150static inline int
151isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
152{
153 return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
154}
155
156static inline int
157isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
158{
159 return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
160}
161
162
163
164
165#define ISP1301_VENDOR_ID 0x00
166#define ISP1301_PRODUCT_ID 0x02
167#define ISP1301_BCD_DEVICE 0x14
168
169#define I2C_VENDOR_ID_PHILIPS 0x04cc
170#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
171
172
173#define ISP1301_MODE_CONTROL_1 0x04
174# define MC1_SPEED (1 << 0)
175# define MC1_SUSPEND (1 << 1)
176# define MC1_DAT_SE0 (1 << 2)
177# define MC1_TRANSPARENT (1 << 3)
178# define MC1_BDIS_ACON_EN (1 << 4)
179# define MC1_OE_INT_EN (1 << 5)
180# define MC1_UART_EN (1 << 6)
181# define MC1_MASK 0x7f
182#define ISP1301_MODE_CONTROL_2 0x12
183# define MC2_GLOBAL_PWR_DN (1 << 0)
184# define MC2_SPD_SUSP_CTRL (1 << 1)
185# define MC2_BI_DI (1 << 2)
186# define MC2_TRANSP_BDIR0 (1 << 3)
187# define MC2_TRANSP_BDIR1 (1 << 4)
188# define MC2_AUDIO_EN (1 << 5)
189# define MC2_PSW_EN (1 << 6)
190# define MC2_EN2V7 (1 << 7)
191#define ISP1301_OTG_CONTROL_1 0x06
192# define OTG1_DP_PULLUP (1 << 0)
193# define OTG1_DM_PULLUP (1 << 1)
194# define OTG1_DP_PULLDOWN (1 << 2)
195# define OTG1_DM_PULLDOWN (1 << 3)
196# define OTG1_ID_PULLDOWN (1 << 4)
197# define OTG1_VBUS_DRV (1 << 5)
198# define OTG1_VBUS_DISCHRG (1 << 6)
199# define OTG1_VBUS_CHRG (1 << 7)
200#define ISP1301_OTG_STATUS 0x10
201# define OTG_B_SESS_END (1 << 6)
202# define OTG_B_SESS_VLD (1 << 7)
203
204#define ISP1301_INTERRUPT_SOURCE 0x08
205#define ISP1301_INTERRUPT_LATCH 0x0A
206
207#define ISP1301_INTERRUPT_FALLING 0x0C
208#define ISP1301_INTERRUPT_RISING 0x0E
209
210
211# define INTR_VBUS_VLD (1 << 0)
212# define INTR_SESS_VLD (1 << 1)
213# define INTR_DP_HI (1 << 2)
214# define INTR_ID_GND (1 << 3)
215# define INTR_DM_HI (1 << 4)
216# define INTR_ID_FLOAT (1 << 5)
217# define INTR_BDIS_ACON (1 << 6)
218# define INTR_CR_INT (1 << 7)
219
220
221
222static inline const char *state_name(struct isp1301 *isp)
223{
224 return usb_otg_state_string(isp->phy.otg->state);
225}
226
227
228
229
230
231
232
233
234
235
236
237static void power_down(struct isp1301 *isp)
238{
239 isp->phy.otg->state = OTG_STATE_UNDEFINED;
240
241
242 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
243
244 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
245 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
246}
247
248static void __maybe_unused power_up(struct isp1301 *isp)
249{
250
251 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
252
253
254
255
256 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
257}
258
259#define NO_HOST_SUSPEND
260
261static int host_suspend(struct isp1301 *isp)
262{
263#ifdef NO_HOST_SUSPEND
264 return 0;
265#else
266 struct device *dev;
267
268 if (!isp->phy.otg->host)
269 return -ENODEV;
270
271
272
273
274 dev = isp->phy.otg->host->controller;
275 return dev->driver->suspend(dev, 3, 0);
276#endif
277}
278
279static int host_resume(struct isp1301 *isp)
280{
281#ifdef NO_HOST_SUSPEND
282 return 0;
283#else
284 struct device *dev;
285
286 if (!isp->phy.otg->host)
287 return -ENODEV;
288
289 dev = isp->phy.otg->host->controller;
290 return dev->driver->resume(dev, 0);
291#endif
292}
293
294static int gadget_suspend(struct isp1301 *isp)
295{
296 isp->phy.otg->gadget->b_hnp_enable = 0;
297 isp->phy.otg->gadget->a_hnp_support = 0;
298 isp->phy.otg->gadget->a_alt_hnp_support = 0;
299 return usb_gadget_vbus_disconnect(isp->phy.otg->gadget);
300}
301
302
303
304#define TIMER_MINUTES 10
305#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
306
307
308
309
310
311static void isp1301_defer_work(struct isp1301 *isp, int work)
312{
313 int status;
314
315 if (isp && !test_and_set_bit(work, &isp->todo)) {
316 (void) get_device(&isp->client->dev);
317 status = schedule_work(&isp->work);
318 if (!status && !isp->working)
319 dev_vdbg(&isp->client->dev,
320 "work item %d may be lost\n", work);
321 }
322}
323
324
325static void a_idle(struct isp1301 *isp, const char *tag)
326{
327 u32 l;
328
329 if (isp->phy.otg->state == OTG_STATE_A_IDLE)
330 return;
331
332 isp->phy.otg->default_a = 1;
333 if (isp->phy.otg->host) {
334 isp->phy.otg->host->is_b_host = 0;
335 host_suspend(isp);
336 }
337 if (isp->phy.otg->gadget) {
338 isp->phy.otg->gadget->is_a_peripheral = 1;
339 gadget_suspend(isp);
340 }
341 isp->phy.otg->state = OTG_STATE_A_IDLE;
342 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
343 omap_writel(l, OTG_CTRL);
344 isp->last_otg_ctrl = l;
345 pr_debug(" --> %s/%s\n", state_name(isp), tag);
346}
347
348
349static void b_idle(struct isp1301 *isp, const char *tag)
350{
351 u32 l;
352
353 if (isp->phy.otg->state == OTG_STATE_B_IDLE)
354 return;
355
356 isp->phy.otg->default_a = 0;
357 if (isp->phy.otg->host) {
358 isp->phy.otg->host->is_b_host = 1;
359 host_suspend(isp);
360 }
361 if (isp->phy.otg->gadget) {
362 isp->phy.otg->gadget->is_a_peripheral = 0;
363 gadget_suspend(isp);
364 }
365 isp->phy.otg->state = OTG_STATE_B_IDLE;
366 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
367 omap_writel(l, OTG_CTRL);
368 isp->last_otg_ctrl = l;
369 pr_debug(" --> %s/%s\n", state_name(isp), tag);
370}
371
372static void
373dump_regs(struct isp1301 *isp, const char *label)
374{
375 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
376 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
377 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
378
379 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
380 omap_readl(OTG_CTRL), label, state_name(isp),
381 ctrl, status, src);
382
383}
384
385
386
387#ifdef CONFIG_USB_OTG
388
389
390
391
392
393
394
395
396
397#ifdef VERBOSE
398
399static void check_state(struct isp1301 *isp, const char *tag)
400{
401 enum usb_otg_state state = OTG_STATE_UNDEFINED;
402 u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
403 unsigned extra = 0;
404
405 switch (fsm) {
406
407
408 case 0x0:
409 state = OTG_STATE_B_IDLE;
410 break;
411 case 0x3:
412 case 0x7:
413 extra = 1;
414 case 0x1:
415 state = OTG_STATE_B_PERIPHERAL;
416 break;
417 case 0x11:
418 state = OTG_STATE_B_SRP_INIT;
419 break;
420
421
422 case 0x12:
423 case 0x13:
424 case 0x16:
425 extra = 1;
426 case 0x17:
427 state = OTG_STATE_B_WAIT_ACON;
428 break;
429 case 0x34:
430 state = OTG_STATE_B_HOST;
431 break;
432
433
434 case 0x36:
435 state = OTG_STATE_A_IDLE;
436 break;
437 case 0x3c:
438 state = OTG_STATE_A_WAIT_VFALL;
439 break;
440 case 0x7d:
441 state = OTG_STATE_A_VBUS_ERR;
442 break;
443 case 0x9e:
444 case 0x9f:
445 extra = 1;
446 case 0x89:
447 state = OTG_STATE_A_PERIPHERAL;
448 break;
449 case 0xb7:
450 state = OTG_STATE_A_WAIT_VRISE;
451 break;
452 case 0xb8:
453 state = OTG_STATE_A_WAIT_BCON;
454 break;
455 case 0xb9:
456 state = OTG_STATE_A_HOST;
457 break;
458 case 0xba:
459 state = OTG_STATE_A_SUSPEND;
460 break;
461 default:
462 break;
463 }
464 if (isp->phy.otg->state == state && !extra)
465 return;
466 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
467 usb_otg_state_string(state), fsm, state_name(isp),
468 omap_readl(OTG_CTRL));
469}
470
471#else
472
473static inline void check_state(struct isp1301 *isp, const char *tag) { }
474
475#endif
476
477
478static void update_otg1(struct isp1301 *isp, u8 int_src)
479{
480 u32 otg_ctrl;
481
482 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
483 otg_ctrl &= ~OTG_XCEIV_INPUTS;
484 otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
485
486 if (int_src & INTR_SESS_VLD)
487 otg_ctrl |= OTG_ASESSVLD;
488 else if (isp->phy.otg->state == OTG_STATE_A_WAIT_VFALL) {
489 a_idle(isp, "vfall");
490 otg_ctrl &= ~OTG_CTRL_BITS;
491 }
492 if (int_src & INTR_VBUS_VLD)
493 otg_ctrl |= OTG_VBUSVLD;
494 if (int_src & INTR_ID_GND) {
495 if (isp->phy.otg->state == OTG_STATE_B_IDLE
496 || isp->phy.otg->state
497 == OTG_STATE_UNDEFINED) {
498 a_idle(isp, "init");
499 return;
500 }
501 } else {
502 otg_ctrl |= OTG_ID;
503 if (isp->phy.otg->state == OTG_STATE_A_IDLE
504 || isp->phy.otg->state == OTG_STATE_UNDEFINED) {
505 b_idle(isp, "init");
506 return;
507 }
508 }
509 omap_writel(otg_ctrl, OTG_CTRL);
510}
511
512
513static void update_otg2(struct isp1301 *isp, u8 otg_status)
514{
515 u32 otg_ctrl;
516
517 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
518 otg_ctrl &= ~OTG_XCEIV_INPUTS;
519 otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
520 if (otg_status & OTG_B_SESS_VLD)
521 otg_ctrl |= OTG_BSESSVLD;
522 else if (otg_status & OTG_B_SESS_END)
523 otg_ctrl |= OTG_BSESSEND;
524 omap_writel(otg_ctrl, OTG_CTRL);
525}
526
527
528static void otg_update_isp(struct isp1301 *isp)
529{
530 u32 otg_ctrl, otg_change;
531 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
532
533 otg_ctrl = omap_readl(OTG_CTRL);
534 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
535 isp->last_otg_ctrl = otg_ctrl;
536 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
537
538 switch (isp->phy.otg->state) {
539 case OTG_STATE_B_IDLE:
540 case OTG_STATE_B_PERIPHERAL:
541 case OTG_STATE_B_SRP_INIT:
542 if (!(otg_ctrl & OTG_PULLUP)) {
543
544 if (isp->phy.otg->gadget->b_hnp_enable) {
545 isp->phy.otg->state = OTG_STATE_B_WAIT_ACON;
546 pr_debug(" --> b_wait_acon\n");
547 }
548 goto pulldown;
549 }
550pullup:
551 set |= OTG1_DP_PULLUP;
552 clr |= OTG1_DP_PULLDOWN;
553 break;
554 case OTG_STATE_A_SUSPEND:
555 case OTG_STATE_A_PERIPHERAL:
556 if (otg_ctrl & OTG_PULLUP)
557 goto pullup;
558
559
560 default:
561pulldown:
562 set |= OTG1_DP_PULLDOWN;
563 clr |= OTG1_DP_PULLUP;
564 break;
565 }
566
567# define toggle(OTG,ISP) do { \
568 if (otg_ctrl & OTG) set |= ISP; \
569 else clr |= ISP; \
570 } while (0)
571
572 if (!(isp->phy.otg->host))
573 otg_ctrl &= ~OTG_DRV_VBUS;
574
575 switch (isp->phy.otg->state) {
576 case OTG_STATE_A_SUSPEND:
577 if (otg_ctrl & OTG_DRV_VBUS) {
578 set |= OTG1_VBUS_DRV;
579 break;
580 }
581
582 notresponding(isp);
583
584
585 case OTG_STATE_A_VBUS_ERR:
586 isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
587 pr_debug(" --> a_wait_vfall\n");
588
589 case OTG_STATE_A_WAIT_VFALL:
590
591 clr |= OTG1_VBUS_DRV;
592 break;
593 case OTG_STATE_A_IDLE:
594 if (otg_ctrl & OTG_DRV_VBUS) {
595 isp->phy.otg->state = OTG_STATE_A_WAIT_VRISE;
596 pr_debug(" --> a_wait_vrise\n");
597 }
598
599 default:
600 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
601 }
602
603 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
604 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
605
606# undef toggle
607
608 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
609 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
610
611
612 if (otg_change & OTG_PULLUP) {
613 u32 l;
614
615 switch (isp->phy.otg->state) {
616 case OTG_STATE_B_IDLE:
617 if (clr & OTG1_DP_PULLUP)
618 break;
619 isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
620 pr_debug(" --> b_peripheral\n");
621 break;
622 case OTG_STATE_A_SUSPEND:
623 if (clr & OTG1_DP_PULLUP)
624 break;
625 isp->phy.otg->state = OTG_STATE_A_PERIPHERAL;
626 pr_debug(" --> a_peripheral\n");
627 break;
628 default:
629 break;
630 }
631 l = omap_readl(OTG_CTRL);
632 l |= OTG_PULLUP;
633 omap_writel(l, OTG_CTRL);
634 }
635
636 check_state(isp, __func__);
637 dump_regs(isp, "otg->isp1301");
638}
639
640static irqreturn_t omap_otg_irq(int irq, void *_isp)
641{
642 u16 otg_irq = omap_readw(OTG_IRQ_SRC);
643 u32 otg_ctrl;
644 int ret = IRQ_NONE;
645 struct isp1301 *isp = _isp;
646 struct usb_otg *otg = isp->phy.otg;
647
648
649 if (otg_irq & OPRT_CHG) {
650 omap_writew(OPRT_CHG, OTG_IRQ_SRC);
651 isp1301_defer_work(isp, WORK_UPDATE_ISP);
652 ret = IRQ_HANDLED;
653
654
655 } else if (otg_irq & B_SRP_TMROUT) {
656 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
657 notresponding(isp);
658
659
660
661
662
663 if (isp->phy.otg->state == OTG_STATE_B_SRP_INIT)
664 b_idle(isp, "srp_timeout");
665
666 omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
667 ret = IRQ_HANDLED;
668
669
670 } else if (otg_irq & B_HNP_FAIL) {
671 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
672 state_name(isp), omap_readl(OTG_CTRL));
673 notresponding(isp);
674
675 otg_ctrl = omap_readl(OTG_CTRL);
676 otg_ctrl |= OTG_BUSDROP;
677 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
678 omap_writel(otg_ctrl, OTG_CTRL);
679
680
681 isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
682 pr_debug(" --> b_peripheral\n");
683
684 omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
685 ret = IRQ_HANDLED;
686
687
688 } else if (otg_irq & A_SRP_DETECT) {
689 pr_debug("otg: %s SRP_DETECT, %06x\n",
690 state_name(isp), omap_readl(OTG_CTRL));
691
692 isp1301_defer_work(isp, WORK_UPDATE_OTG);
693 switch (isp->phy.otg->state) {
694 case OTG_STATE_A_IDLE:
695 if (!otg->host)
696 break;
697 isp1301_defer_work(isp, WORK_HOST_RESUME);
698 otg_ctrl = omap_readl(OTG_CTRL);
699 otg_ctrl |= OTG_A_BUSREQ;
700 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
701 & ~OTG_XCEIV_INPUTS
702 & OTG_CTRL_MASK;
703 omap_writel(otg_ctrl, OTG_CTRL);
704 break;
705 default:
706 break;
707 }
708
709 omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
710 ret = IRQ_HANDLED;
711
712
713
714
715 } else if (otg_irq & A_REQ_TMROUT) {
716 otg_ctrl = omap_readl(OTG_CTRL);
717 pr_info("otg: BCON_TMOUT from %s, %06x\n",
718 state_name(isp), otg_ctrl);
719 notresponding(isp);
720
721 otg_ctrl |= OTG_BUSDROP;
722 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
723 omap_writel(otg_ctrl, OTG_CTRL);
724 isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
725
726 omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
727 ret = IRQ_HANDLED;
728
729
730 } else if (otg_irq & A_VBUS_ERR) {
731 otg_ctrl = omap_readl(OTG_CTRL);
732 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
733 state_name(isp), otg_irq, otg_ctrl);
734
735 otg_ctrl |= OTG_BUSDROP;
736 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
737 omap_writel(otg_ctrl, OTG_CTRL);
738 isp->phy.otg->state = OTG_STATE_A_VBUS_ERR;
739
740 omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
741 ret = IRQ_HANDLED;
742
743
744
745
746 } else if (otg_irq & DRIVER_SWITCH) {
747 int kick = 0;
748
749 otg_ctrl = omap_readl(OTG_CTRL);
750 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
751 state_name(isp),
752 (otg_ctrl & OTG_DRIVER_SEL)
753 ? "gadget" : "host",
754 otg_ctrl);
755 isp1301_defer_work(isp, WORK_UPDATE_ISP);
756
757
758 if (otg_ctrl & OTG_DRIVER_SEL) {
759 switch (isp->phy.otg->state) {
760 case OTG_STATE_A_IDLE:
761 b_idle(isp, __func__);
762 break;
763 default:
764 break;
765 }
766 isp1301_defer_work(isp, WORK_UPDATE_ISP);
767
768
769 } else {
770 if (!(otg_ctrl & OTG_ID)) {
771 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
772 omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
773 }
774
775 if (otg->host) {
776 switch (isp->phy.otg->state) {
777 case OTG_STATE_B_WAIT_ACON:
778 isp->phy.otg->state = OTG_STATE_B_HOST;
779 pr_debug(" --> b_host\n");
780 kick = 1;
781 break;
782 case OTG_STATE_A_WAIT_BCON:
783 isp->phy.otg->state = OTG_STATE_A_HOST;
784 pr_debug(" --> a_host\n");
785 break;
786 case OTG_STATE_A_PERIPHERAL:
787 isp->phy.otg->state = OTG_STATE_A_WAIT_BCON;
788 pr_debug(" --> a_wait_bcon\n");
789 break;
790 default:
791 break;
792 }
793 isp1301_defer_work(isp, WORK_HOST_RESUME);
794 }
795 }
796
797 omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
798 ret = IRQ_HANDLED;
799
800 if (kick)
801 usb_bus_start_enum(otg->host, otg->host->otg_port);
802 }
803
804 check_state(isp, __func__);
805 return ret;
806}
807
808static struct platform_device *otg_dev;
809
810static int isp1301_otg_init(struct isp1301 *isp)
811{
812 u32 l;
813
814 if (!otg_dev)
815 return -ENODEV;
816
817 dump_regs(isp, __func__);
818
819 l = omap_readl(OTG_SYSCON_2);
820 l |= OTG_EN
821
822 | SRP_GPDATA
823 | SRP_GPDVBUS
824
825
826 | (0 << 20)
827 | SRP_DPW
828 | SRP_DATA | SRP_VBUS
829 ;
830 omap_writel(l, OTG_SYSCON_2);
831
832 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
833 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
834
835 check_state(isp, __func__);
836 pr_debug("otg: %s, %s %06x\n",
837 state_name(isp), __func__, omap_readl(OTG_CTRL));
838
839 omap_writew(DRIVER_SWITCH | OPRT_CHG
840 | B_SRP_TMROUT | B_HNP_FAIL
841 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
842
843 l = omap_readl(OTG_SYSCON_2);
844 l |= OTG_EN;
845 omap_writel(l, OTG_SYSCON_2);
846
847 return 0;
848}
849
850static int otg_probe(struct platform_device *dev)
851{
852
853
854 otg_dev = dev;
855 return 0;
856}
857
858static int otg_remove(struct platform_device *dev)
859{
860 otg_dev = NULL;
861 return 0;
862}
863
864static struct platform_driver omap_otg_driver = {
865 .probe = otg_probe,
866 .remove = otg_remove,
867 .driver = {
868 .name = "omap_otg",
869 },
870};
871
872static int otg_bind(struct isp1301 *isp)
873{
874 int status;
875
876 if (otg_dev)
877 return -EBUSY;
878
879 status = platform_driver_register(&omap_otg_driver);
880 if (status < 0)
881 return status;
882
883 if (otg_dev)
884 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
885 0, DRIVER_NAME, isp);
886 else
887 status = -ENODEV;
888
889 if (status < 0)
890 platform_driver_unregister(&omap_otg_driver);
891 return status;
892}
893
894static void otg_unbind(struct isp1301 *isp)
895{
896 if (!otg_dev)
897 return;
898 free_irq(otg_dev->resource[1].start, isp);
899}
900
901#else
902
903
904
905#endif
906
907
908
909static void b_peripheral(struct isp1301 *isp)
910{
911 u32 l;
912
913 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
914 omap_writel(l, OTG_CTRL);
915
916 usb_gadget_vbus_connect(isp->phy.otg->gadget);
917
918#ifdef CONFIG_USB_OTG
919 enable_vbus_draw(isp, 8);
920 otg_update_isp(isp);
921#else
922 enable_vbus_draw(isp, 100);
923
924 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
925 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
926 isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
927 pr_debug(" --> b_peripheral\n");
928 dump_regs(isp, "2periph");
929#endif
930}
931
932static void isp_update_otg(struct isp1301 *isp, u8 stat)
933{
934 struct usb_otg *otg = isp->phy.otg;
935 u8 isp_stat, isp_bstat;
936 enum usb_otg_state state = isp->phy.otg->state;
937
938 if (stat & INTR_BDIS_ACON)
939 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
940
941
942 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
943 if (isp_stat & INTR_ID_GND) {
944 if (otg->default_a) {
945 switch (state) {
946 case OTG_STATE_B_IDLE:
947 a_idle(isp, "idle");
948
949 case OTG_STATE_A_IDLE:
950 enable_vbus_source(isp);
951
952 case OTG_STATE_A_WAIT_VRISE:
953
954
955
956
957
958 if (isp_stat & INTR_VBUS_VLD)
959 isp->phy.otg->state = OTG_STATE_A_HOST;
960 break;
961 case OTG_STATE_A_WAIT_VFALL:
962 if (!(isp_stat & INTR_SESS_VLD))
963 a_idle(isp, "vfell");
964 break;
965 default:
966 if (!(isp_stat & INTR_VBUS_VLD))
967 isp->phy.otg->state = OTG_STATE_A_VBUS_ERR;
968 break;
969 }
970 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
971 } else {
972 switch (state) {
973 case OTG_STATE_B_PERIPHERAL:
974 case OTG_STATE_B_HOST:
975 case OTG_STATE_B_WAIT_ACON:
976 usb_gadget_vbus_disconnect(otg->gadget);
977 break;
978 default:
979 break;
980 }
981 if (state != OTG_STATE_A_IDLE)
982 a_idle(isp, "id");
983 if (otg->host && state == OTG_STATE_A_IDLE)
984 isp1301_defer_work(isp, WORK_HOST_RESUME);
985 isp_bstat = 0;
986 }
987 } else {
988 u32 l;
989
990
991
992
993 if (otg->default_a) {
994 switch (state) {
995 default:
996 isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
997 break;
998 case OTG_STATE_A_WAIT_VFALL:
999 state = OTG_STATE_A_IDLE;
1000
1001
1002
1003
1004 break;
1005 case OTG_STATE_A_IDLE:
1006 host_suspend(isp);
1007 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1008 MC1_BDIS_ACON_EN);
1009 isp->phy.otg->state = OTG_STATE_B_IDLE;
1010 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1011 l &= ~OTG_CTRL_BITS;
1012 omap_writel(l, OTG_CTRL);
1013 break;
1014 case OTG_STATE_B_IDLE:
1015 break;
1016 }
1017 }
1018 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1019
1020 switch (isp->phy.otg->state) {
1021 case OTG_STATE_B_PERIPHERAL:
1022 case OTG_STATE_B_WAIT_ACON:
1023 case OTG_STATE_B_HOST:
1024 if (likely(isp_bstat & OTG_B_SESS_VLD))
1025 break;
1026 enable_vbus_draw(isp, 0);
1027#ifndef CONFIG_USB_OTG
1028
1029 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1030 OTG1_DP_PULLDOWN);
1031 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1032 OTG1_DP_PULLUP);
1033 dump_regs(isp, __func__);
1034#endif
1035
1036 case OTG_STATE_B_SRP_INIT:
1037 b_idle(isp, __func__);
1038 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
1039 omap_writel(l, OTG_CTRL);
1040
1041 case OTG_STATE_B_IDLE:
1042 if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1043#ifdef CONFIG_USB_OTG
1044 update_otg1(isp, isp_stat);
1045 update_otg2(isp, isp_bstat);
1046#endif
1047 b_peripheral(isp);
1048 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1049 isp_bstat |= OTG_B_SESS_END;
1050 break;
1051 case OTG_STATE_A_WAIT_VFALL:
1052 break;
1053 default:
1054 pr_debug("otg: unsupported b-device %s\n",
1055 state_name(isp));
1056 break;
1057 }
1058 }
1059
1060 if (state != isp->phy.otg->state)
1061 pr_debug(" isp, %s -> %s\n",
1062 usb_otg_state_string(state), state_name(isp));
1063
1064#ifdef CONFIG_USB_OTG
1065
1066
1067
1068 update_otg1(isp, isp_stat);
1069 update_otg2(isp, isp_bstat);
1070 check_state(isp, __func__);
1071#endif
1072
1073 dump_regs(isp, "isp1301->otg");
1074}
1075
1076
1077
1078static u8 isp1301_clear_latch(struct isp1301 *isp)
1079{
1080 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1081 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1082 return latch;
1083}
1084
1085static void
1086isp1301_work(struct work_struct *work)
1087{
1088 struct isp1301 *isp = container_of(work, struct isp1301, work);
1089 int stop;
1090
1091
1092 isp->working = 1;
1093 do {
1094 stop = test_bit(WORK_STOP, &isp->todo);
1095
1096#ifdef CONFIG_USB_OTG
1097
1098 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1099 otg_update_isp(isp);
1100 put_device(&isp->client->dev);
1101 }
1102#endif
1103
1104 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1105 u8 stat = isp1301_clear_latch(isp);
1106
1107 isp_update_otg(isp, stat);
1108 put_device(&isp->client->dev);
1109 }
1110
1111 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1112 u32 otg_ctrl;
1113
1114
1115
1116
1117
1118 switch (isp->phy.otg->state) {
1119 case OTG_STATE_A_WAIT_BCON:
1120 case OTG_STATE_A_WAIT_VRISE:
1121 isp->phy.otg->state = OTG_STATE_A_HOST;
1122 pr_debug(" --> a_host\n");
1123 otg_ctrl = omap_readl(OTG_CTRL);
1124 otg_ctrl |= OTG_A_BUSREQ;
1125 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1126 & OTG_CTRL_MASK;
1127 omap_writel(otg_ctrl, OTG_CTRL);
1128 break;
1129 case OTG_STATE_B_WAIT_ACON:
1130 isp->phy.otg->state = OTG_STATE_B_HOST;
1131 pr_debug(" --> b_host (acon)\n");
1132 break;
1133 case OTG_STATE_B_HOST:
1134 case OTG_STATE_B_IDLE:
1135 case OTG_STATE_A_IDLE:
1136 break;
1137 default:
1138 pr_debug(" host resume in %s\n",
1139 state_name(isp));
1140 }
1141 host_resume(isp);
1142
1143 put_device(&isp->client->dev);
1144 }
1145
1146 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1147#ifdef VERBOSE
1148 dump_regs(isp, "timer");
1149 if (!stop)
1150 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1151#endif
1152 put_device(&isp->client->dev);
1153 }
1154
1155 if (isp->todo)
1156 dev_vdbg(&isp->client->dev,
1157 "work done, todo = 0x%lx\n",
1158 isp->todo);
1159 if (stop) {
1160 dev_dbg(&isp->client->dev, "stop\n");
1161 break;
1162 }
1163 } while (isp->todo);
1164 isp->working = 0;
1165}
1166
1167static irqreturn_t isp1301_irq(int irq, void *isp)
1168{
1169 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1170 return IRQ_HANDLED;
1171}
1172
1173static void isp1301_timer(struct timer_list *t)
1174{
1175 struct isp1301 *isp = from_timer(isp, t, timer);
1176
1177 isp1301_defer_work(isp, WORK_TIMER);
1178}
1179
1180
1181
1182static void isp1301_release(struct device *dev)
1183{
1184 struct isp1301 *isp;
1185
1186 isp = dev_get_drvdata(dev);
1187
1188
1189
1190
1191 if (isp->i2c_release)
1192 isp->i2c_release(dev);
1193 kfree(isp->phy.otg);
1194 kfree (isp);
1195}
1196
1197static struct isp1301 *the_transceiver;
1198
1199static int isp1301_remove(struct i2c_client *i2c)
1200{
1201 struct isp1301 *isp;
1202
1203 isp = i2c_get_clientdata(i2c);
1204
1205 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1206 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1207 free_irq(i2c->irq, isp);
1208#ifdef CONFIG_USB_OTG
1209 otg_unbind(isp);
1210#endif
1211 if (machine_is_omap_h2())
1212 gpio_free(2);
1213
1214 set_bit(WORK_STOP, &isp->todo);
1215 del_timer_sync(&isp->timer);
1216 flush_work(&isp->work);
1217
1218 put_device(&i2c->dev);
1219 the_transceiver = NULL;
1220
1221 return 0;
1222}
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239#ifdef CONFIG_USB_OTG
1240
1241static int isp1301_otg_enable(struct isp1301 *isp)
1242{
1243 power_up(isp);
1244 isp1301_otg_init(isp);
1245
1246
1247
1248
1249 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1250 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1251 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1252 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1253
1254 dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
1255
1256 return 0;
1257}
1258
1259#endif
1260
1261
1262static int
1263isp1301_set_host(struct usb_otg *otg, struct usb_bus *host)
1264{
1265 struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
1266
1267 if (isp != the_transceiver)
1268 return -ENODEV;
1269
1270 if (!host) {
1271 omap_writew(0, OTG_IRQ_EN);
1272 power_down(isp);
1273 otg->host = NULL;
1274 return 0;
1275 }
1276
1277#ifdef CONFIG_USB_OTG
1278 otg->host = host;
1279 dev_dbg(&isp->client->dev, "registered host\n");
1280 host_suspend(isp);
1281 if (otg->gadget)
1282 return isp1301_otg_enable(isp);
1283 return 0;
1284
1285#elif !IS_ENABLED(CONFIG_USB_OMAP)
1286
1287 otg->host = host;
1288
1289 power_up(isp);
1290
1291 if (machine_is_omap_h2())
1292 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1293
1294 dev_info(&isp->client->dev, "A-Host sessions ok\n");
1295 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1296 INTR_ID_GND);
1297 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1298 INTR_ID_GND);
1299
1300
1301
1302
1303
1304
1305 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1306
1307 dump_regs(isp, __func__);
1308
1309 return 0;
1310
1311#else
1312 dev_dbg(&isp->client->dev, "host sessions not allowed\n");
1313 return -EINVAL;
1314#endif
1315
1316}
1317
1318static int
1319isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
1320{
1321 struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
1322
1323 if (isp != the_transceiver)
1324 return -ENODEV;
1325
1326 if (!gadget) {
1327 omap_writew(0, OTG_IRQ_EN);
1328 if (!otg->default_a)
1329 enable_vbus_draw(isp, 0);
1330 usb_gadget_vbus_disconnect(otg->gadget);
1331 otg->gadget = NULL;
1332 power_down(isp);
1333 return 0;
1334 }
1335
1336#ifdef CONFIG_USB_OTG
1337 otg->gadget = gadget;
1338 dev_dbg(&isp->client->dev, "registered gadget\n");
1339
1340 if (otg->host)
1341 return isp1301_otg_enable(isp);
1342 return 0;
1343
1344#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1345 otg->gadget = gadget;
1346
1347
1348 {
1349 u32 l;
1350
1351 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1352 l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
1353 l |= OTG_ID;
1354 omap_writel(l, OTG_CTRL);
1355 }
1356
1357 power_up(isp);
1358 isp->phy.otg->state = OTG_STATE_B_IDLE;
1359
1360 if (machine_is_omap_h2() || machine_is_omap_h3())
1361 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1362
1363 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1364 INTR_SESS_VLD);
1365 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1366 INTR_VBUS_VLD);
1367 dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1368 dump_regs(isp, __func__);
1369
1370
1371
1372
1373
1374 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1375 b_peripheral(isp);
1376
1377 return 0;
1378
1379#else
1380 dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
1381 return -EINVAL;
1382#endif
1383}
1384
1385
1386
1387
1388static int
1389isp1301_set_power(struct usb_phy *dev, unsigned mA)
1390{
1391 if (!the_transceiver)
1392 return -ENODEV;
1393 if (dev->otg->state == OTG_STATE_B_PERIPHERAL)
1394 enable_vbus_draw(the_transceiver, mA);
1395 return 0;
1396}
1397
1398static int
1399isp1301_start_srp(struct usb_otg *otg)
1400{
1401 struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
1402 u32 otg_ctrl;
1403
1404 if (isp != the_transceiver || isp->phy.otg->state != OTG_STATE_B_IDLE)
1405 return -ENODEV;
1406
1407 otg_ctrl = omap_readl(OTG_CTRL);
1408 if (!(otg_ctrl & OTG_BSESSEND))
1409 return -EINVAL;
1410
1411 otg_ctrl |= OTG_B_BUSREQ;
1412 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1413 omap_writel(otg_ctrl, OTG_CTRL);
1414 isp->phy.otg->state = OTG_STATE_B_SRP_INIT;
1415
1416 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
1417 omap_readl(OTG_CTRL));
1418#ifdef CONFIG_USB_OTG
1419 check_state(isp, __func__);
1420#endif
1421 return 0;
1422}
1423
1424static int
1425isp1301_start_hnp(struct usb_otg *otg)
1426{
1427#ifdef CONFIG_USB_OTG
1428 struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
1429 u32 l;
1430
1431 if (isp != the_transceiver)
1432 return -ENODEV;
1433 if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable))
1434 return -ENOTCONN;
1435 if (!otg->default_a && (otg->gadget == NULL
1436 || !otg->gadget->b_hnp_enable))
1437 return -ENOTCONN;
1438
1439
1440
1441
1442 switch (isp->phy.otg->state) {
1443 case OTG_STATE_B_HOST:
1444 isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
1445
1446 break;
1447 case OTG_STATE_A_HOST:
1448#if 0
1449
1450 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1451 MC1_BDIS_ACON_EN);
1452#endif
1453
1454 usb_gadget_vbus_connect(otg->gadget);
1455 l = omap_readl(OTG_CTRL);
1456 l |= OTG_A_SETB_HNPEN;
1457 omap_writel(l, OTG_CTRL);
1458
1459 break;
1460 case OTG_STATE_A_PERIPHERAL:
1461
1462 break;
1463 default:
1464 return -EILSEQ;
1465 }
1466 pr_debug("otg: HNP %s, %06x ...\n",
1467 state_name(isp), omap_readl(OTG_CTRL));
1468 check_state(isp, __func__);
1469 return 0;
1470#else
1471
1472 return -EINVAL;
1473#endif
1474}
1475
1476
1477
1478static int
1479isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
1480{
1481 int status;
1482 struct isp1301 *isp;
1483
1484 if (the_transceiver)
1485 return 0;
1486
1487 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1488 if (!isp)
1489 return 0;
1490
1491 isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL);
1492 if (!isp->phy.otg) {
1493 kfree(isp);
1494 return 0;
1495 }
1496
1497 INIT_WORK(&isp->work, isp1301_work);
1498 timer_setup(&isp->timer, isp1301_timer, 0);
1499
1500 i2c_set_clientdata(i2c, isp);
1501 isp->client = i2c;
1502
1503
1504 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1505 if (status != I2C_VENDOR_ID_PHILIPS) {
1506 dev_dbg(&i2c->dev, "not philips id: %d\n", status);
1507 goto fail;
1508 }
1509 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1510 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1511 dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
1512 goto fail;
1513 }
1514 isp->i2c_release = i2c->dev.release;
1515 i2c->dev.release = isp1301_release;
1516
1517
1518 status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
1519 dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1520 status >> 8, status & 0xff);
1521
1522
1523 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1524
1525 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1526 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1527
1528 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1529 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1530 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1531 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1532
1533 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1534 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1535 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1536
1537#ifdef CONFIG_USB_OTG
1538 status = otg_bind(isp);
1539 if (status < 0) {
1540 dev_dbg(&i2c->dev, "can't bind OTG\n");
1541 goto fail;
1542 }
1543#endif
1544
1545 if (machine_is_omap_h2()) {
1546
1547 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1548 MC1_SPEED);
1549 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
1550 MC2_SPD_SUSP_CTRL);
1551
1552
1553 omap_cfg_reg(M14_1510_GPIO2);
1554 if (gpio_request(2, "isp1301") == 0)
1555 gpio_direction_input(2);
1556 isp->irq_type = IRQF_TRIGGER_FALLING;
1557 }
1558
1559 status = request_irq(i2c->irq, isp1301_irq,
1560 isp->irq_type, DRIVER_NAME, isp);
1561 if (status < 0) {
1562 dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1563 i2c->irq, status);
1564 goto fail;
1565 }
1566
1567 isp->phy.dev = &i2c->dev;
1568 isp->phy.label = DRIVER_NAME;
1569 isp->phy.set_power = isp1301_set_power,
1570
1571 isp->phy.otg->usb_phy = &isp->phy;
1572 isp->phy.otg->set_host = isp1301_set_host,
1573 isp->phy.otg->set_peripheral = isp1301_set_peripheral,
1574 isp->phy.otg->start_srp = isp1301_start_srp,
1575 isp->phy.otg->start_hnp = isp1301_start_hnp,
1576
1577 enable_vbus_draw(isp, 0);
1578 power_down(isp);
1579 the_transceiver = isp;
1580
1581#ifdef CONFIG_USB_OTG
1582 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1583 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1584#endif
1585
1586 dump_regs(isp, __func__);
1587
1588#ifdef VERBOSE
1589 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1590 dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1591#endif
1592
1593 status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
1594 if (status < 0)
1595 dev_err(&i2c->dev, "can't register transceiver, %d\n",
1596 status);
1597
1598 return 0;
1599
1600fail:
1601 kfree(isp->phy.otg);
1602 kfree(isp);
1603 return -ENODEV;
1604}
1605
1606static const struct i2c_device_id isp1301_id[] = {
1607 { "isp1301_omap", 0 },
1608 { }
1609};
1610MODULE_DEVICE_TABLE(i2c, isp1301_id);
1611
1612static struct i2c_driver isp1301_driver = {
1613 .driver = {
1614 .name = "isp1301_omap",
1615 },
1616 .probe = isp1301_probe,
1617 .remove = isp1301_remove,
1618 .id_table = isp1301_id,
1619};
1620
1621
1622
1623static int __init isp_init(void)
1624{
1625 return i2c_add_driver(&isp1301_driver);
1626}
1627subsys_initcall(isp_init);
1628
1629static void __exit isp_exit(void)
1630{
1631 if (the_transceiver)
1632 usb_remove_phy(&the_transceiver->phy);
1633 i2c_del_driver(&isp1301_driver);
1634}
1635module_exit(isp_exit);
1636
1637
