2 * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
4 * Copyright (C) 2004 Texas Instruments
5 * Copyright (C) 2004 David Brownell
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.
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.
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.
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 #include <asm/arch/usb.h>
43 #define DRIVER_VERSION "24 August 2004"
44 #define DRIVER_NAME (isp1301_driver.driver.name)
46 MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
47 MODULE_LICENSE("GPL");
50 struct otg_transceiver otg;
51 struct i2c_client *client;
52 void (*i2c_release)(struct device *dev);
57 struct timer_list timer;
59 /* use keventd context to change the state for us */
60 struct work_struct work;
63 # define WORK_UPDATE_ISP 0 /* update ISP from OTG */
64 # define WORK_UPDATE_OTG 1 /* update OTG from ISP */
65 # define WORK_HOST_RESUME 4 /* resume host */
66 # define WORK_TIMER 6 /* timer fired */
67 # define WORK_STOP 7 /* don't resubmit */
71 /* bits in OTG_CTRL_REG */
73 #define OTG_XCEIV_OUTPUTS \
74 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
75 #define OTG_XCEIV_INPUTS \
76 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
77 #define OTG_CTRL_BITS \
78 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
79 /* and OTG_PULLUP is sometimes written */
81 #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
82 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
86 /*-------------------------------------------------------------------------*/
88 #if defined(CONFIG_MACH_OMAP_H2) || \
89 defined(CONFIG_MACH_OMAP_H3)
91 /* board-specific PM hooks */
94 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
96 #include <asm/arch/tps65010.h>
100 static inline int tps65010_set_vbus_draw(unsigned mA)
102 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
108 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
110 int status = tps65010_set_vbus_draw(mA);
112 pr_debug(" VBUS %d mA error %d\n", mA, status);
115 static void enable_vbus_source(struct isp1301 *isp)
117 /* this board won't supply more than 8mA vbus power.
118 * some boards can switch a 100ma "unit load" (or more).
125 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
127 pr_debug("%s UNIMPL\n", __FUNCTION__);
130 static void enable_vbus_source(struct isp1301 *isp)
132 pr_debug("%s UNIMPL\n", __FUNCTION__);
137 /*-------------------------------------------------------------------------*/
139 /* products will deliver OTG messages with LEDs, GUI, etc */
140 static inline void notresponding(struct isp1301 *isp)
142 printk(KERN_NOTICE "OTG device not responding.\n");
145 /*-------------------------------------------------------------------------*/
147 /* only two addresses possible */
148 static struct i2c_driver isp1301_driver;
150 /* smbus apis are used for portability */
153 isp1301_get_u8(struct isp1301 *isp, u8 reg)
155 return i2c_smbus_read_byte_data(isp->client, reg + 0);
159 isp1301_get_u16(struct isp1301 *isp, u8 reg)
161 return i2c_smbus_read_word_data(isp->client, reg);
165 isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
167 return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
171 isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
173 return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
176 /*-------------------------------------------------------------------------*/
179 #define ISP1301_VENDOR_ID 0x00 /* u16 read */
180 #define ISP1301_PRODUCT_ID 0x02 /* u16 read */
181 #define ISP1301_BCD_DEVICE 0x14 /* u16 read */
183 #define I2C_VENDOR_ID_PHILIPS 0x04cc
184 #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
186 /* operational registers */
187 #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
188 # define MC1_SPEED_REG (1 << 0)
189 # define MC1_SUSPEND_REG (1 << 1)
190 # define MC1_DAT_SE0 (1 << 2)
191 # define MC1_TRANSPARENT (1 << 3)
192 # define MC1_BDIS_ACON_EN (1 << 4)
193 # define MC1_OE_INT_EN (1 << 5)
194 # define MC1_UART_EN (1 << 6)
195 # define MC1_MASK 0x7f
196 #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
197 # define MC2_GLOBAL_PWR_DN (1 << 0)
198 # define MC2_SPD_SUSP_CTRL (1 << 1)
199 # define MC2_BI_DI (1 << 2)
200 # define MC2_TRANSP_BDIR0 (1 << 3)
201 # define MC2_TRANSP_BDIR1 (1 << 4)
202 # define MC2_AUDIO_EN (1 << 5)
203 # define MC2_PSW_EN (1 << 6)
204 # define MC2_EN2V7 (1 << 7)
205 #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
206 # define OTG1_DP_PULLUP (1 << 0)
207 # define OTG1_DM_PULLUP (1 << 1)
208 # define OTG1_DP_PULLDOWN (1 << 2)
209 # define OTG1_DM_PULLDOWN (1 << 3)
210 # define OTG1_ID_PULLDOWN (1 << 4)
211 # define OTG1_VBUS_DRV (1 << 5)
212 # define OTG1_VBUS_DISCHRG (1 << 6)
213 # define OTG1_VBUS_CHRG (1 << 7)
214 #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
215 # define OTG_B_SESS_END (1 << 6)
216 # define OTG_B_SESS_VLD (1 << 7)
218 #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
219 #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
221 #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
222 #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
224 /* same bitfields in all interrupt registers */
225 # define INTR_VBUS_VLD (1 << 0)
226 # define INTR_SESS_VLD (1 << 1)
227 # define INTR_DP_HI (1 << 2)
228 # define INTR_ID_GND (1 << 3)
229 # define INTR_DM_HI (1 << 4)
230 # define INTR_ID_FLOAT (1 << 5)
231 # define INTR_BDIS_ACON (1 << 6)
232 # define INTR_CR_INT (1 << 7)
234 /*-------------------------------------------------------------------------*/
236 static const char *state_string(enum usb_otg_state state)
239 case OTG_STATE_A_IDLE: return "a_idle";
240 case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
241 case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
242 case OTG_STATE_A_HOST: return "a_host";
243 case OTG_STATE_A_SUSPEND: return "a_suspend";
244 case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
245 case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
246 case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
247 case OTG_STATE_B_IDLE: return "b_idle";
248 case OTG_STATE_B_SRP_INIT: return "b_srp_init";
249 case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
250 case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
251 case OTG_STATE_B_HOST: return "b_host";
252 default: return "UNDEFINED";
256 static inline const char *state_name(struct isp1301 *isp)
258 return state_string(isp->otg.state);
262 #define dev_vdbg dev_dbg
264 #define dev_vdbg(dev, fmt, arg...) do{}while(0)
267 /*-------------------------------------------------------------------------*/
269 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
270 * not everything is guarded by board-specific checks, or even using
271 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
273 * ALSO: this currently doesn't use ISP1301 low-power modes
274 * while OTG is running.
277 static void power_down(struct isp1301 *isp)
279 isp->otg.state = OTG_STATE_UNDEFINED;
281 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
282 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG);
284 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
285 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
288 static void power_up(struct isp1301 *isp)
290 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
291 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG);
293 /* do this only when cpu is driving transceiver,
294 * so host won't see a low speed device...
296 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
299 #define NO_HOST_SUSPEND
301 static int host_suspend(struct isp1301 *isp)
303 #ifdef NO_HOST_SUSPEND
311 /* Currently ASSUMES only the OTG port matters;
312 * other ports could be active...
314 dev = isp->otg.host->controller;
315 return dev->driver->suspend(dev, 3, 0);
319 static int host_resume(struct isp1301 *isp)
321 #ifdef NO_HOST_SUSPEND
329 dev = isp->otg.host->controller;
330 return dev->driver->resume(dev, 0);
334 static int gadget_suspend(struct isp1301 *isp)
336 isp->otg.gadget->b_hnp_enable = 0;
337 isp->otg.gadget->a_hnp_support = 0;
338 isp->otg.gadget->a_alt_hnp_support = 0;
339 return usb_gadget_vbus_disconnect(isp->otg.gadget);
342 /*-------------------------------------------------------------------------*/
344 #define TIMER_MINUTES 10
345 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
347 /* Almost all our I2C messaging comes from a work queue's task context.
348 * NOTE: guaranteeing certain response times might mean we shouldn't
349 * share keventd's work queue; a realtime task might be safest.
352 isp1301_defer_work(struct isp1301 *isp, int work)
356 if (isp && !test_and_set_bit(work, &isp->todo)) {
357 (void) get_device(&isp->client->dev);
358 status = schedule_work(&isp->work);
359 if (!status && !isp->working)
360 dev_vdbg(&isp->client->dev,
361 "work item %d may be lost\n", work);
365 /* called from irq handlers */
366 static void a_idle(struct isp1301 *isp, const char *tag)
368 if (isp->otg.state == OTG_STATE_A_IDLE)
371 isp->otg.default_a = 1;
373 isp->otg.host->is_b_host = 0;
376 if (isp->otg.gadget) {
377 isp->otg.gadget->is_a_peripheral = 1;
380 isp->otg.state = OTG_STATE_A_IDLE;
381 isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
382 pr_debug(" --> %s/%s\n", state_name(isp), tag);
385 /* called from irq handlers */
386 static void b_idle(struct isp1301 *isp, const char *tag)
388 if (isp->otg.state == OTG_STATE_B_IDLE)
391 isp->otg.default_a = 0;
393 isp->otg.host->is_b_host = 1;
396 if (isp->otg.gadget) {
397 isp->otg.gadget->is_a_peripheral = 0;
400 isp->otg.state = OTG_STATE_B_IDLE;
401 isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
402 pr_debug(" --> %s/%s\n", state_name(isp), tag);
406 dump_regs(struct isp1301 *isp, const char *label)
409 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
410 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
411 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
413 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
414 OTG_CTRL_REG, label, state_name(isp),
416 /* mode control and irq enables don't change much */
420 /*-------------------------------------------------------------------------*/
422 #ifdef CONFIG_USB_OTG
425 * The OMAP OTG controller handles most of the OTG state transitions.
427 * We translate isp1301 outputs (mostly voltage comparator status) into
428 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
429 * flags into isp1301 inputs ... and infer state transitions.
434 static void check_state(struct isp1301 *isp, const char *tag)
436 enum usb_otg_state state = OTG_STATE_UNDEFINED;
437 u8 fsm = OTG_TEST_REG & 0x0ff;
444 state = OTG_STATE_B_IDLE;
450 state = OTG_STATE_B_PERIPHERAL;
453 state = OTG_STATE_B_SRP_INIT;
456 /* extra dual-role default-b states */
462 state = OTG_STATE_B_WAIT_ACON;
465 state = OTG_STATE_B_HOST;
470 state = OTG_STATE_A_IDLE;
473 state = OTG_STATE_A_WAIT_VFALL;
476 state = OTG_STATE_A_VBUS_ERR;
482 state = OTG_STATE_A_PERIPHERAL;
485 state = OTG_STATE_A_WAIT_VRISE;
488 state = OTG_STATE_A_WAIT_BCON;
491 state = OTG_STATE_A_HOST;
494 state = OTG_STATE_A_SUSPEND;
499 if (isp->otg.state == state && !extra)
501 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
502 state_string(state), fsm, state_name(isp), OTG_CTRL_REG);
507 static inline void check_state(struct isp1301 *isp, const char *tag) { }
511 /* outputs from ISP1301_INTERRUPT_SOURCE */
512 static void update_otg1(struct isp1301 *isp, u8 int_src)
517 otg_ctrl = OTG_CTRL_REG
520 & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
521 if (int_src & INTR_SESS_VLD)
522 otg_ctrl |= OTG_ASESSVLD;
523 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
524 a_idle(isp, "vfall");
525 otg_ctrl &= ~OTG_CTRL_BITS;
527 if (int_src & INTR_VBUS_VLD)
528 otg_ctrl |= OTG_VBUSVLD;
530 int_id = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
532 if (int_id & INTR_ID_GND) { /* default-A */
533 if (isp->otg.state == OTG_STATE_B_IDLE
534 || isp->otg.state == OTG_STATE_UNDEFINED) {
538 } else { /* default-B */
540 if (isp->otg.state == OTG_STATE_A_IDLE
541 || isp->otg.state == OTG_STATE_UNDEFINED) {
546 OTG_CTRL_REG = otg_ctrl;
549 /* outputs from ISP1301_OTG_STATUS */
550 static void update_otg2(struct isp1301 *isp, u8 otg_status)
554 otg_ctrl = OTG_CTRL_REG
557 & ~(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 OTG_CTRL_REG = otg_ctrl;
565 /* inputs going to ISP1301 */
566 static void otg_update_isp(struct isp1301 *isp)
568 u32 otg_ctrl, otg_change;
569 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
571 otg_ctrl = OTG_CTRL_REG;
572 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
573 isp->last_otg_ctrl = otg_ctrl;
574 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
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");
589 set |= OTG1_DP_PULLUP;
590 clr |= OTG1_DP_PULLDOWN;
592 case OTG_STATE_A_SUSPEND:
593 case OTG_STATE_A_PERIPHERAL:
594 if (otg_ctrl & OTG_PULLUP)
597 // case OTG_STATE_B_WAIT_ACON:
600 set |= OTG1_DP_PULLDOWN;
601 clr |= OTG1_DP_PULLUP;
605 # define toggle(OTG,ISP) do { \
606 if (otg_ctrl & OTG) set |= ISP; \
610 if (!(isp->otg.host))
611 otg_ctrl &= ~OTG_DRV_VBUS;
613 switch (isp->otg.state) {
614 case OTG_STATE_A_SUSPEND:
615 if (otg_ctrl & OTG_DRV_VBUS) {
616 set |= OTG1_VBUS_DRV;
619 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
623 case OTG_STATE_A_VBUS_ERR:
624 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
625 pr_debug(" --> a_wait_vfall\n");
627 case OTG_STATE_A_WAIT_VFALL:
628 /* FIXME usbcore thinks port power is still on ... */
629 clr |= OTG1_VBUS_DRV;
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");
638 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
641 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
642 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
646 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
647 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
649 /* HNP switch to host or peripheral; and SRP */
650 if (otg_change & OTG_PULLUP) {
651 switch (isp->otg.state) {
652 case OTG_STATE_B_IDLE:
653 if (clr & OTG1_DP_PULLUP)
655 isp->otg.state = OTG_STATE_B_PERIPHERAL;
656 pr_debug(" --> b_peripheral\n");
658 case OTG_STATE_A_SUSPEND:
659 if (clr & OTG1_DP_PULLUP)
661 isp->otg.state = OTG_STATE_A_PERIPHERAL;
662 pr_debug(" --> a_peripheral\n");
667 OTG_CTRL_REG |= OTG_PULLUP;
670 check_state(isp, __FUNCTION__);
671 dump_regs(isp, "otg->isp1301");
674 static irqreturn_t omap_otg_irq(int irq, void *_isp)
676 u16 otg_irq = OTG_IRQ_SRC_REG;
679 struct isp1301 *isp = _isp;
681 /* update ISP1301 transciever from OTG controller */
682 if (otg_irq & OPRT_CHG) {
683 OTG_IRQ_SRC_REG = OPRT_CHG;
684 isp1301_defer_work(isp, WORK_UPDATE_ISP);
687 /* SRP to become b_peripheral failed */
688 } else if (otg_irq & B_SRP_TMROUT) {
689 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG);
692 /* gadget drivers that care should monitor all kinds of
693 * remote wakeup (SRP, normal) using their own timer
694 * to give "check cable and A-device" messages.
696 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
697 b_idle(isp, "srp_timeout");
699 OTG_IRQ_SRC_REG = B_SRP_TMROUT;
702 /* HNP to become b_host failed */
703 } else if (otg_irq & B_HNP_FAIL) {
704 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
705 state_name(isp), OTG_CTRL_REG);
708 otg_ctrl = OTG_CTRL_REG;
709 otg_ctrl |= OTG_BUSDROP;
710 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
711 OTG_CTRL_REG = otg_ctrl;
713 /* subset of b_peripheral()... */
714 isp->otg.state = OTG_STATE_B_PERIPHERAL;
715 pr_debug(" --> b_peripheral\n");
717 OTG_IRQ_SRC_REG = B_HNP_FAIL;
720 /* detect SRP from B-device ... */
721 } else if (otg_irq & A_SRP_DETECT) {
722 pr_debug("otg: %s SRP_DETECT, %06x\n",
723 state_name(isp), OTG_CTRL_REG);
725 isp1301_defer_work(isp, WORK_UPDATE_OTG);
726 switch (isp->otg.state) {
727 case OTG_STATE_A_IDLE:
730 isp1301_defer_work(isp, WORK_HOST_RESUME);
731 otg_ctrl = OTG_CTRL_REG;
732 otg_ctrl |= OTG_A_BUSREQ;
733 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
736 OTG_CTRL_REG = otg_ctrl;
742 OTG_IRQ_SRC_REG = A_SRP_DETECT;
745 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
746 * we don't track them separately
748 } else if (otg_irq & A_REQ_TMROUT) {
749 otg_ctrl = OTG_CTRL_REG;
750 pr_info("otg: BCON_TMOUT from %s, %06x\n",
751 state_name(isp), otg_ctrl);
754 otg_ctrl |= OTG_BUSDROP;
755 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
756 OTG_CTRL_REG = otg_ctrl;
757 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
759 OTG_IRQ_SRC_REG = A_REQ_TMROUT;
762 /* A-supplied voltage fell too low; overcurrent */
763 } else if (otg_irq & A_VBUS_ERR) {
764 otg_ctrl = OTG_CTRL_REG;
765 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
766 state_name(isp), otg_irq, otg_ctrl);
768 otg_ctrl |= OTG_BUSDROP;
769 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
770 OTG_CTRL_REG = otg_ctrl;
771 isp->otg.state = OTG_STATE_A_VBUS_ERR;
773 OTG_IRQ_SRC_REG = A_VBUS_ERR;
776 /* switch driver; the transciever code activates it,
777 * ungating the udc clock or resuming OHCI.
779 } else if (otg_irq & DRIVER_SWITCH) {
782 otg_ctrl = OTG_CTRL_REG;
783 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
785 (otg_ctrl & OTG_DRIVER_SEL)
788 isp1301_defer_work(isp, WORK_UPDATE_ISP);
790 /* role is peripheral */
791 if (otg_ctrl & OTG_DRIVER_SEL) {
792 switch (isp->otg.state) {
793 case OTG_STATE_A_IDLE:
794 b_idle(isp, __FUNCTION__);
799 isp1301_defer_work(isp, WORK_UPDATE_ISP);
803 if (!(otg_ctrl & OTG_ID)) {
804 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
805 OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ;
809 switch (isp->otg.state) {
810 case OTG_STATE_B_WAIT_ACON:
811 isp->otg.state = OTG_STATE_B_HOST;
812 pr_debug(" --> b_host\n");
815 case OTG_STATE_A_WAIT_BCON:
816 isp->otg.state = OTG_STATE_A_HOST;
817 pr_debug(" --> a_host\n");
819 case OTG_STATE_A_PERIPHERAL:
820 isp->otg.state = OTG_STATE_A_WAIT_BCON;
821 pr_debug(" --> a_wait_bcon\n");
826 isp1301_defer_work(isp, WORK_HOST_RESUME);
830 OTG_IRQ_SRC_REG = DRIVER_SWITCH;
834 usb_bus_start_enum(isp->otg.host,
835 isp->otg.host->otg_port);
838 check_state(isp, __FUNCTION__);
842 static struct platform_device *otg_dev;
844 static int otg_init(struct isp1301 *isp)
849 dump_regs(isp, __FUNCTION__);
850 /* some of these values are board-specific... */
851 OTG_SYSCON_2_REG |= OTG_EN
853 | SRP_GPDATA /* 9msec Bdev D+ pulse */
854 | SRP_GPDVBUS /* discharge after VBUS pulse */
855 // | (3 << 24) /* 2msec VBUS pulse */
857 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
858 | SRP_DPW /* detect 167+ns SRP pulses */
859 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
862 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
863 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
865 check_state(isp, __FUNCTION__);
866 pr_debug("otg: %s, %s %06x\n",
867 state_name(isp), __FUNCTION__, OTG_CTRL_REG);
869 OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG
870 | B_SRP_TMROUT | B_HNP_FAIL
871 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT;
872 OTG_SYSCON_2_REG |= OTG_EN;
877 static int otg_probe(struct platform_device *dev)
879 // struct omap_usb_config *config = dev->platform_data;
885 static int otg_remove(struct platform_device *dev)
891 struct platform_driver omap_otg_driver = {
893 .remove = otg_remove,
895 .owner = THIS_MODULE,
900 static int otg_bind(struct isp1301 *isp)
907 status = platform_driver_register(&omap_otg_driver);
912 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
913 IRQF_DISABLED, DRIVER_NAME, isp);
918 platform_driver_unregister(&omap_otg_driver);
922 static void otg_unbind(struct isp1301 *isp)
926 free_irq(otg_dev->resource[1].start, isp);
931 /* OTG controller isn't clocked */
933 #endif /* CONFIG_USB_OTG */
935 /*-------------------------------------------------------------------------*/
937 static void b_peripheral(struct isp1301 *isp)
939 OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
940 usb_gadget_vbus_connect(isp->otg.gadget);
942 #ifdef CONFIG_USB_OTG
943 enable_vbus_draw(isp, 8);
946 enable_vbus_draw(isp, 100);
947 /* UDC driver just set OTG_BSESSVLD */
948 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
949 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
950 isp->otg.state = OTG_STATE_B_PERIPHERAL;
951 pr_debug(" --> b_peripheral\n");
952 dump_regs(isp, "2periph");
956 static void isp_update_otg(struct isp1301 *isp, u8 stat)
958 u8 isp_stat, isp_bstat;
959 enum usb_otg_state state = isp->otg.state;
961 if (stat & INTR_BDIS_ACON)
962 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
964 /* start certain state transitions right away */
965 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
966 if (isp_stat & INTR_ID_GND) {
967 if (isp->otg.default_a) {
969 case OTG_STATE_B_IDLE:
972 case OTG_STATE_A_IDLE:
973 enable_vbus_source(isp);
975 case OTG_STATE_A_WAIT_VRISE:
976 /* we skip over OTG_STATE_A_WAIT_BCON, since
977 * the HC will transition to A_HOST (or
978 * A_SUSPEND!) without our noticing except
981 if (isp_stat & INTR_VBUS_VLD)
982 isp->otg.state = OTG_STATE_A_HOST;
984 case OTG_STATE_A_WAIT_VFALL:
985 if (!(isp_stat & INTR_SESS_VLD))
986 a_idle(isp, "vfell");
989 if (!(isp_stat & INTR_VBUS_VLD))
990 isp->otg.state = OTG_STATE_A_VBUS_ERR;
993 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
996 case OTG_STATE_B_PERIPHERAL:
997 case OTG_STATE_B_HOST:
998 case OTG_STATE_B_WAIT_ACON:
999 usb_gadget_vbus_disconnect(isp->otg.gadget);
1004 if (state != OTG_STATE_A_IDLE)
1006 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1007 isp1301_defer_work(isp, WORK_HOST_RESUME);
1011 /* if user unplugged mini-A end of cable,
1012 * don't bypass A_WAIT_VFALL.
1014 if (isp->otg.default_a) {
1017 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1019 case OTG_STATE_A_WAIT_VFALL:
1020 state = OTG_STATE_A_IDLE;
1021 /* khubd may take a while to notice and
1022 * handle this disconnect, so don't go
1023 * to B_IDLE quite yet.
1026 case OTG_STATE_A_IDLE:
1028 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1030 isp->otg.state = OTG_STATE_B_IDLE;
1031 OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK
1034 case OTG_STATE_B_IDLE:
1038 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1040 switch (isp->otg.state) {
1041 case OTG_STATE_B_PERIPHERAL:
1042 case OTG_STATE_B_WAIT_ACON:
1043 case OTG_STATE_B_HOST:
1044 if (likely(isp_bstat & OTG_B_SESS_VLD))
1046 enable_vbus_draw(isp, 0);
1047 #ifndef CONFIG_USB_OTG
1048 /* UDC driver will clear OTG_BSESSVLD */
1049 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1051 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1053 dump_regs(isp, __FUNCTION__);
1056 case OTG_STATE_B_SRP_INIT:
1057 b_idle(isp, __FUNCTION__);
1058 OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
1060 case OTG_STATE_B_IDLE:
1061 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1062 #ifdef CONFIG_USB_OTG
1063 update_otg1(isp, isp_stat);
1064 update_otg2(isp, isp_bstat);
1067 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1068 isp_bstat |= OTG_B_SESS_END;
1070 case OTG_STATE_A_WAIT_VFALL:
1073 pr_debug("otg: unsupported b-device %s\n",
1079 if (state != isp->otg.state)
1080 pr_debug(" isp, %s -> %s\n",
1081 state_string(state), state_name(isp));
1083 #ifdef CONFIG_USB_OTG
1084 /* update the OTG controller state to match the isp1301; may
1085 * trigger OPRT_CHG irqs for changes going to the isp1301.
1087 update_otg1(isp, stat); // pass the actual interrupt latch status
1088 update_otg2(isp, isp_bstat);
1089 check_state(isp, __FUNCTION__);
1092 dump_regs(isp, "isp1301->otg");
1095 /*-------------------------------------------------------------------------*/
1097 static u8 isp1301_clear_latch(struct isp1301 *isp)
1099 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1100 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1105 isp1301_work(struct work_struct *work)
1107 struct isp1301 *isp = container_of(work, struct isp1301, work);
1110 /* implicit lock: we're the only task using this device */
1113 stop = test_bit(WORK_STOP, &isp->todo);
1115 #ifdef CONFIG_USB_OTG
1116 /* transfer state from otg engine to isp1301 */
1117 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1118 otg_update_isp(isp);
1119 put_device(&isp->client->dev);
1122 /* transfer state from isp1301 to otg engine */
1123 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1124 u8 stat = isp1301_clear_latch(isp);
1126 isp_update_otg(isp, stat);
1127 put_device(&isp->client->dev);
1130 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1134 * skip A_WAIT_VRISE; hc transitions invisibly
1135 * skip A_WAIT_BCON; same.
1137 switch (isp->otg.state) {
1138 case OTG_STATE_A_WAIT_BCON:
1139 case OTG_STATE_A_WAIT_VRISE:
1140 isp->otg.state = OTG_STATE_A_HOST;
1141 pr_debug(" --> a_host\n");
1142 otg_ctrl = OTG_CTRL_REG;
1143 otg_ctrl |= OTG_A_BUSREQ;
1144 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1146 OTG_CTRL_REG = otg_ctrl;
1148 case OTG_STATE_B_WAIT_ACON:
1149 isp->otg.state = OTG_STATE_B_HOST;
1150 pr_debug(" --> b_host (acon)\n");
1152 case OTG_STATE_B_HOST:
1153 case OTG_STATE_B_IDLE:
1154 case OTG_STATE_A_IDLE:
1157 pr_debug(" host resume in %s\n",
1162 put_device(&isp->client->dev);
1165 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1167 dump_regs(isp, "timer");
1169 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1171 put_device(&isp->client->dev);
1175 dev_vdbg(&isp->client->dev,
1176 "work done, todo = 0x%lx\n",
1179 dev_dbg(&isp->client->dev, "stop\n");
1182 } while (isp->todo);
1186 static irqreturn_t isp1301_irq(int irq, void *isp)
1188 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1192 static void isp1301_timer(unsigned long _isp)
1194 isp1301_defer_work((void *)_isp, WORK_TIMER);
1197 /*-------------------------------------------------------------------------*/
1199 static void isp1301_release(struct device *dev)
1201 struct i2c_client *client;
1202 struct isp1301 *isp;
1204 client = container_of(dev, struct i2c_client, dev);
1205 isp = i2c_get_clientdata(client);
1207 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1208 if (isp->i2c_release)
1209 isp->i2c_release(dev);
1213 static struct isp1301 *the_transceiver;
1215 static int __exit isp1301_remove(struct i2c_client *client)
1217 struct isp1301 *isp = i2c_get_clientdata(client);
1219 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1220 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1222 if (client->irq > 0)
1223 free_irq(client->irq, isp);
1224 #ifdef CONFIG_USB_OTG
1227 isp->timer.data = 0;
1228 set_bit(WORK_STOP, &isp->todo);
1229 del_timer_sync(&isp->timer);
1230 flush_scheduled_work();
1232 put_device(&client->dev);
1233 the_transceiver = 0;
1238 /*-------------------------------------------------------------------------*/
1240 /* NOTE: three modes are possible here, only one of which
1241 * will be standards-conformant on any given system:
1243 * - OTG mode (dual-role), required if there's a Mini-AB connector
1244 * - HOST mode, for when there's one or more A (host) connectors
1245 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1247 * As a rule, you won't have an isp1301 chip unless it's there to
1248 * support the OTG mode. Other modes help testing USB controllers
1249 * in isolation from (full) OTG support, or maybe so later board
1250 * revisions can help to support those feature.
1253 #ifdef CONFIG_USB_OTG
1255 static int isp1301_otg_enable(struct isp1301 *isp)
1260 /* NOTE: since we don't change this, this provides
1261 * a few more interrupts than are strictly needed.
1263 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1264 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1265 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1266 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1268 dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
1275 /* add or disable the host device+driver */
1277 isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
1279 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1281 if (!otg || isp != the_transceiver)
1291 #ifdef CONFIG_USB_OTG
1292 isp->otg.host = host;
1293 dev_dbg(&isp->client->dev, "registered host\n");
1295 if (isp->otg.gadget)
1296 return isp1301_otg_enable(isp);
1299 #elif !defined(CONFIG_USB_GADGET_OMAP)
1300 // FIXME update its refcount
1301 isp->otg.host = host;
1305 dev_info(&isp->client->dev, "A-Host sessions ok\n");
1306 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1308 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1311 /* If this has a Mini-AB connector, this mode is highly
1312 * nonstandard ... but can be handy for testing, especially with
1313 * the Mini-A end of an OTG cable. (Or something nonstandard
1314 * like MiniB-to-StandardB, maybe built with a gender mender.)
1316 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1318 dump_regs(isp, __FUNCTION__);
1323 dev_dbg(&isp->client->dev, "host sessions not allowed\n");
1330 isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1332 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1334 if (!otg || isp != the_transceiver)
1339 if (!isp->otg.default_a)
1340 enable_vbus_draw(isp, 0);
1341 usb_gadget_vbus_disconnect(isp->otg.gadget);
1342 isp->otg.gadget = 0;
1347 #ifdef CONFIG_USB_OTG
1348 isp->otg.gadget = gadget;
1349 dev_dbg(&isp->client->dev, "registered gadget\n");
1350 /* gadget driver may be suspended until vbus_connect () */
1352 return isp1301_otg_enable(isp);
1355 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1356 isp->otg.gadget = gadget;
1357 // FIXME update its refcount
1359 OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK
1360 & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS))
1363 isp->otg.state = OTG_STATE_B_IDLE;
1366 if (machine_is_omap_h2() || machine_is_omap_h3())
1367 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1369 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1370 INTR_SESS_VLD | INTR_VBUS_VLD);
1371 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1372 INTR_VBUS_VLD | INTR_SESS_VLD);
1373 dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1374 dump_regs(isp, __FUNCTION__);
1376 /* If this has a Mini-AB connector, this mode is highly
1377 * nonstandard ... but can be handy for testing, so long
1378 * as you don't plug a Mini-A cable into the jack.
1380 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1386 dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
1392 /*-------------------------------------------------------------------------*/
1395 isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1397 if (!the_transceiver)
1399 if (dev->state == OTG_STATE_B_PERIPHERAL)
1400 enable_vbus_draw(the_transceiver, mA);
1405 isp1301_start_srp(struct otg_transceiver *dev)
1407 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1410 if (!dev || isp != the_transceiver
1411 || isp->otg.state != OTG_STATE_B_IDLE)
1414 otg_ctrl = OTG_CTRL_REG;
1415 if (!(otg_ctrl & OTG_BSESSEND))
1418 otg_ctrl |= OTG_B_BUSREQ;
1419 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1420 OTG_CTRL_REG = otg_ctrl;
1421 isp->otg.state = OTG_STATE_B_SRP_INIT;
1423 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG);
1424 #ifdef CONFIG_USB_OTG
1425 check_state(isp, __FUNCTION__);
1431 isp1301_start_hnp(struct otg_transceiver *dev)
1433 #ifdef CONFIG_USB_OTG
1434 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1436 if (!dev || isp != the_transceiver)
1438 if (isp->otg.default_a && (isp->otg.host == NULL
1439 || !isp->otg.host->b_hnp_enable))
1441 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1442 || !isp->otg.gadget->b_hnp_enable))
1445 /* We want hardware to manage most HNP protocol timings.
1446 * So do this part as early as possible...
1448 switch (isp->otg.state) {
1449 case OTG_STATE_B_PERIPHERAL:
1450 isp->otg.state = OTG_STATE_B_WAIT_ACON;
1451 isp1301_defer_work(isp, WORK_UPDATE_ISP);
1453 case OTG_STATE_B_HOST:
1454 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1455 /* caller will suspend next */
1457 case OTG_STATE_A_HOST:
1459 /* autoconnect mode avoids irq latency bugs */
1460 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1463 /* caller must suspend then clear A_BUSREQ */
1464 usb_gadget_vbus_connect(isp->otg.gadget);
1465 OTG_CTRL_REG |= OTG_A_SETB_HNPEN;
1468 case OTG_STATE_A_PERIPHERAL:
1469 /* initiated by B-Host suspend */
1474 pr_debug("otg: HNP %s, %06x ...\n",
1475 state_name(isp), OTG_CTRL_REG);
1476 check_state(isp, __FUNCTION__);
1484 /*-------------------------------------------------------------------------*/
1486 /* no error returns, they'd just make bus scanning stop */
1487 static int __init isp1301_probe(struct i2c_client *client)
1490 struct isp1301 *isp;
1492 if (the_transceiver)
1495 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1499 INIT_WORK(&isp->work, isp1301_work);
1500 init_timer(&isp->timer);
1501 isp->timer.function = isp1301_timer;
1502 isp->timer.data = (unsigned long) isp;
1503 isp->client = client;
1505 /* if this is a true probe, verify the chip ... */
1506 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1507 if (status != I2C_VENDOR_ID_PHILIPS) {
1508 dev_dbg(&client->dev, "not philips id: %d\n",
1512 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1513 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1514 dev_dbg(&client->dev, "not isp1301, %d\n",
1520 dev_dbg(&client->dev, "can't attach %s to device, err %d\n",
1521 DRIVER_NAME, status);
1526 isp->i2c_release = client->dev.release;
1527 client->dev.release = isp1301_release;
1529 /* initial development used chiprev 2.00 */
1530 status = i2c_smbus_read_word_data(client, ISP1301_BCD_DEVICE);
1531 dev_info(&client->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1532 status >> 8, status & 0xff);
1534 /* make like power-on reset */
1535 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1537 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1538 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1540 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1541 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1542 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1543 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1545 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1546 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1547 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1549 #ifdef CONFIG_USB_OTG
1550 status = otg_bind(isp);
1552 dev_dbg(&client->dev, "can't bind OTG\n");
1557 status = request_irq(client->irq, isp1301_irq,
1558 IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
1561 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
1562 client->irq, status);
1563 #ifdef CONFIG_USB_OTG
1566 i2c_detach_client(client);
1570 isp->otg.dev = &client->dev;
1571 isp->otg.label = DRIVER_NAME;
1573 isp->otg.set_host = isp1301_set_host,
1574 isp->otg.set_peripheral = isp1301_set_peripheral,
1575 isp->otg.set_power = isp1301_set_power,
1576 isp->otg.start_srp = isp1301_start_srp,
1577 isp->otg.start_hnp = isp1301_start_hnp,
1579 enable_vbus_draw(isp, 0);
1581 the_transceiver = isp;
1583 #ifdef CONFIG_USB_OTG
1584 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1585 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1587 dump_regs(isp, __FUNCTION__);
1590 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1591 dev_dbg(&client->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1594 status = otg_set_transceiver(&isp->otg);
1596 dev_err(&client->dev, "can't register transceiver, %d\n",
1602 static struct i2c_driver isp1301_driver = {
1604 .name = "isp1301_omap",
1606 .probe = isp1301_probe,
1607 .remove = __exit_p(isp1301_remove),
1610 /*-------------------------------------------------------------------------*/
1612 static int __init isp_init(void)
1614 int status = -ENODEV;
1616 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1618 status = i2c_add_driver(&isp1301_driver);
1620 printk(KERN_ERR "%s failed to probe\n", DRIVER_NAME);
1624 module_init(isp_init);
1626 static void __exit isp_exit(void)
1628 if (the_transceiver)
1629 otg_set_transceiver(0);
1630 i2c_del_driver(&isp1301_driver);
1632 module_exit(isp_exit);