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 <linux/i2c/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);
261 /*-------------------------------------------------------------------------*/
263 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
264 * not everything is guarded by board-specific checks, or even using
265 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
267 * ALSO: this currently doesn't use ISP1301 low-power modes
268 * while OTG is running.
271 static void power_down(struct isp1301 *isp)
273 isp->otg.state = OTG_STATE_UNDEFINED;
275 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
276 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG);
278 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
279 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
282 static void power_up(struct isp1301 *isp)
284 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
285 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG);
287 /* do this only when cpu is driving transceiver,
288 * so host won't see a low speed device...
290 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
293 #define NO_HOST_SUSPEND
295 static int host_suspend(struct isp1301 *isp)
297 #ifdef NO_HOST_SUSPEND
305 /* Currently ASSUMES only the OTG port matters;
306 * other ports could be active...
308 dev = isp->otg.host->controller;
309 return dev->driver->suspend(dev, 3, 0);
313 static int host_resume(struct isp1301 *isp)
315 #ifdef NO_HOST_SUSPEND
323 dev = isp->otg.host->controller;
324 return dev->driver->resume(dev, 0);
328 static int gadget_suspend(struct isp1301 *isp)
330 isp->otg.gadget->b_hnp_enable = 0;
331 isp->otg.gadget->a_hnp_support = 0;
332 isp->otg.gadget->a_alt_hnp_support = 0;
333 return usb_gadget_vbus_disconnect(isp->otg.gadget);
336 /*-------------------------------------------------------------------------*/
338 #define TIMER_MINUTES 10
339 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
341 /* Almost all our I2C messaging comes from a work queue's task context.
342 * NOTE: guaranteeing certain response times might mean we shouldn't
343 * share keventd's work queue; a realtime task might be safest.
346 isp1301_defer_work(struct isp1301 *isp, int work)
350 if (isp && !test_and_set_bit(work, &isp->todo)) {
351 (void) get_device(&isp->client->dev);
352 status = schedule_work(&isp->work);
353 if (!status && !isp->working)
354 dev_vdbg(&isp->client->dev,
355 "work item %d may be lost\n", work);
359 /* called from irq handlers */
360 static void a_idle(struct isp1301 *isp, const char *tag)
362 if (isp->otg.state == OTG_STATE_A_IDLE)
365 isp->otg.default_a = 1;
367 isp->otg.host->is_b_host = 0;
370 if (isp->otg.gadget) {
371 isp->otg.gadget->is_a_peripheral = 1;
374 isp->otg.state = OTG_STATE_A_IDLE;
375 isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
376 pr_debug(" --> %s/%s\n", state_name(isp), tag);
379 /* called from irq handlers */
380 static void b_idle(struct isp1301 *isp, const char *tag)
382 if (isp->otg.state == OTG_STATE_B_IDLE)
385 isp->otg.default_a = 0;
387 isp->otg.host->is_b_host = 1;
390 if (isp->otg.gadget) {
391 isp->otg.gadget->is_a_peripheral = 0;
394 isp->otg.state = OTG_STATE_B_IDLE;
395 isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
396 pr_debug(" --> %s/%s\n", state_name(isp), tag);
400 dump_regs(struct isp1301 *isp, const char *label)
403 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
404 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
405 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
407 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
408 OTG_CTRL_REG, label, state_name(isp),
410 /* mode control and irq enables don't change much */
414 /*-------------------------------------------------------------------------*/
416 #ifdef CONFIG_USB_OTG
419 * The OMAP OTG controller handles most of the OTG state transitions.
421 * We translate isp1301 outputs (mostly voltage comparator status) into
422 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
423 * flags into isp1301 inputs ... and infer state transitions.
428 static void check_state(struct isp1301 *isp, const char *tag)
430 enum usb_otg_state state = OTG_STATE_UNDEFINED;
431 u8 fsm = OTG_TEST_REG & 0x0ff;
438 state = OTG_STATE_B_IDLE;
444 state = OTG_STATE_B_PERIPHERAL;
447 state = OTG_STATE_B_SRP_INIT;
450 /* extra dual-role default-b states */
456 state = OTG_STATE_B_WAIT_ACON;
459 state = OTG_STATE_B_HOST;
464 state = OTG_STATE_A_IDLE;
467 state = OTG_STATE_A_WAIT_VFALL;
470 state = OTG_STATE_A_VBUS_ERR;
476 state = OTG_STATE_A_PERIPHERAL;
479 state = OTG_STATE_A_WAIT_VRISE;
482 state = OTG_STATE_A_WAIT_BCON;
485 state = OTG_STATE_A_HOST;
488 state = OTG_STATE_A_SUSPEND;
493 if (isp->otg.state == state && !extra)
495 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
496 state_string(state), fsm, state_name(isp), OTG_CTRL_REG);
501 static inline void check_state(struct isp1301 *isp, const char *tag) { }
505 /* outputs from ISP1301_INTERRUPT_SOURCE */
506 static void update_otg1(struct isp1301 *isp, u8 int_src)
511 otg_ctrl = OTG_CTRL_REG
514 & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
515 if (int_src & INTR_SESS_VLD)
516 otg_ctrl |= OTG_ASESSVLD;
517 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
518 a_idle(isp, "vfall");
519 otg_ctrl &= ~OTG_CTRL_BITS;
521 if (int_src & INTR_VBUS_VLD)
522 otg_ctrl |= OTG_VBUSVLD;
524 int_id = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
526 if (int_id & INTR_ID_GND) { /* default-A */
527 if (isp->otg.state == OTG_STATE_B_IDLE
528 || isp->otg.state == OTG_STATE_UNDEFINED) {
532 } else { /* default-B */
534 if (isp->otg.state == OTG_STATE_A_IDLE
535 || isp->otg.state == OTG_STATE_UNDEFINED) {
540 OTG_CTRL_REG = otg_ctrl;
543 /* outputs from ISP1301_OTG_STATUS */
544 static void update_otg2(struct isp1301 *isp, u8 otg_status)
548 otg_ctrl = OTG_CTRL_REG
551 & ~(OTG_BSESSVLD|OTG_BSESSEND);
552 if (otg_status & OTG_B_SESS_VLD)
553 otg_ctrl |= OTG_BSESSVLD;
554 else if (otg_status & OTG_B_SESS_END)
555 otg_ctrl |= OTG_BSESSEND;
556 OTG_CTRL_REG = otg_ctrl;
559 /* inputs going to ISP1301 */
560 static void otg_update_isp(struct isp1301 *isp)
562 u32 otg_ctrl, otg_change;
563 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
565 otg_ctrl = OTG_CTRL_REG;
566 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
567 isp->last_otg_ctrl = otg_ctrl;
568 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
570 switch (isp->otg.state) {
571 case OTG_STATE_B_IDLE:
572 case OTG_STATE_B_PERIPHERAL:
573 case OTG_STATE_B_SRP_INIT:
574 if (!(otg_ctrl & OTG_PULLUP)) {
575 // if (otg_ctrl & OTG_B_HNPEN) {
576 if (isp->otg.gadget->b_hnp_enable) {
577 isp->otg.state = OTG_STATE_B_WAIT_ACON;
578 pr_debug(" --> b_wait_acon\n");
583 set |= OTG1_DP_PULLUP;
584 clr |= OTG1_DP_PULLDOWN;
586 case OTG_STATE_A_SUSPEND:
587 case OTG_STATE_A_PERIPHERAL:
588 if (otg_ctrl & OTG_PULLUP)
591 // case OTG_STATE_B_WAIT_ACON:
594 set |= OTG1_DP_PULLDOWN;
595 clr |= OTG1_DP_PULLUP;
599 # define toggle(OTG,ISP) do { \
600 if (otg_ctrl & OTG) set |= ISP; \
604 if (!(isp->otg.host))
605 otg_ctrl &= ~OTG_DRV_VBUS;
607 switch (isp->otg.state) {
608 case OTG_STATE_A_SUSPEND:
609 if (otg_ctrl & OTG_DRV_VBUS) {
610 set |= OTG1_VBUS_DRV;
613 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
617 case OTG_STATE_A_VBUS_ERR:
618 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
619 pr_debug(" --> a_wait_vfall\n");
621 case OTG_STATE_A_WAIT_VFALL:
622 /* FIXME usbcore thinks port power is still on ... */
623 clr |= OTG1_VBUS_DRV;
625 case OTG_STATE_A_IDLE:
626 if (otg_ctrl & OTG_DRV_VBUS) {
627 isp->otg.state = OTG_STATE_A_WAIT_VRISE;
628 pr_debug(" --> a_wait_vrise\n");
632 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
635 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
636 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
640 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
641 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
643 /* HNP switch to host or peripheral; and SRP */
644 if (otg_change & OTG_PULLUP) {
645 switch (isp->otg.state) {
646 case OTG_STATE_B_IDLE:
647 if (clr & OTG1_DP_PULLUP)
649 isp->otg.state = OTG_STATE_B_PERIPHERAL;
650 pr_debug(" --> b_peripheral\n");
652 case OTG_STATE_A_SUSPEND:
653 if (clr & OTG1_DP_PULLUP)
655 isp->otg.state = OTG_STATE_A_PERIPHERAL;
656 pr_debug(" --> a_peripheral\n");
661 OTG_CTRL_REG |= OTG_PULLUP;
664 check_state(isp, __FUNCTION__);
665 dump_regs(isp, "otg->isp1301");
668 static irqreturn_t omap_otg_irq(int irq, void *_isp)
670 u16 otg_irq = OTG_IRQ_SRC_REG;
673 struct isp1301 *isp = _isp;
675 /* update ISP1301 transciever from OTG controller */
676 if (otg_irq & OPRT_CHG) {
677 OTG_IRQ_SRC_REG = OPRT_CHG;
678 isp1301_defer_work(isp, WORK_UPDATE_ISP);
681 /* SRP to become b_peripheral failed */
682 } else if (otg_irq & B_SRP_TMROUT) {
683 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG);
686 /* gadget drivers that care should monitor all kinds of
687 * remote wakeup (SRP, normal) using their own timer
688 * to give "check cable and A-device" messages.
690 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
691 b_idle(isp, "srp_timeout");
693 OTG_IRQ_SRC_REG = B_SRP_TMROUT;
696 /* HNP to become b_host failed */
697 } else if (otg_irq & B_HNP_FAIL) {
698 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
699 state_name(isp), OTG_CTRL_REG);
702 otg_ctrl = OTG_CTRL_REG;
703 otg_ctrl |= OTG_BUSDROP;
704 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
705 OTG_CTRL_REG = otg_ctrl;
707 /* subset of b_peripheral()... */
708 isp->otg.state = OTG_STATE_B_PERIPHERAL;
709 pr_debug(" --> b_peripheral\n");
711 OTG_IRQ_SRC_REG = B_HNP_FAIL;
714 /* detect SRP from B-device ... */
715 } else if (otg_irq & A_SRP_DETECT) {
716 pr_debug("otg: %s SRP_DETECT, %06x\n",
717 state_name(isp), OTG_CTRL_REG);
719 isp1301_defer_work(isp, WORK_UPDATE_OTG);
720 switch (isp->otg.state) {
721 case OTG_STATE_A_IDLE:
724 isp1301_defer_work(isp, WORK_HOST_RESUME);
725 otg_ctrl = OTG_CTRL_REG;
726 otg_ctrl |= OTG_A_BUSREQ;
727 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
730 OTG_CTRL_REG = otg_ctrl;
736 OTG_IRQ_SRC_REG = A_SRP_DETECT;
739 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
740 * we don't track them separately
742 } else if (otg_irq & A_REQ_TMROUT) {
743 otg_ctrl = OTG_CTRL_REG;
744 pr_info("otg: BCON_TMOUT from %s, %06x\n",
745 state_name(isp), otg_ctrl);
748 otg_ctrl |= OTG_BUSDROP;
749 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
750 OTG_CTRL_REG = otg_ctrl;
751 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
753 OTG_IRQ_SRC_REG = A_REQ_TMROUT;
756 /* A-supplied voltage fell too low; overcurrent */
757 } else if (otg_irq & A_VBUS_ERR) {
758 otg_ctrl = OTG_CTRL_REG;
759 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
760 state_name(isp), otg_irq, otg_ctrl);
762 otg_ctrl |= OTG_BUSDROP;
763 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
764 OTG_CTRL_REG = otg_ctrl;
765 isp->otg.state = OTG_STATE_A_VBUS_ERR;
767 OTG_IRQ_SRC_REG = A_VBUS_ERR;
770 /* switch driver; the transciever code activates it,
771 * ungating the udc clock or resuming OHCI.
773 } else if (otg_irq & DRIVER_SWITCH) {
776 otg_ctrl = OTG_CTRL_REG;
777 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
779 (otg_ctrl & OTG_DRIVER_SEL)
782 isp1301_defer_work(isp, WORK_UPDATE_ISP);
784 /* role is peripheral */
785 if (otg_ctrl & OTG_DRIVER_SEL) {
786 switch (isp->otg.state) {
787 case OTG_STATE_A_IDLE:
788 b_idle(isp, __FUNCTION__);
793 isp1301_defer_work(isp, WORK_UPDATE_ISP);
797 if (!(otg_ctrl & OTG_ID)) {
798 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
799 OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ;
803 switch (isp->otg.state) {
804 case OTG_STATE_B_WAIT_ACON:
805 isp->otg.state = OTG_STATE_B_HOST;
806 pr_debug(" --> b_host\n");
809 case OTG_STATE_A_WAIT_BCON:
810 isp->otg.state = OTG_STATE_A_HOST;
811 pr_debug(" --> a_host\n");
813 case OTG_STATE_A_PERIPHERAL:
814 isp->otg.state = OTG_STATE_A_WAIT_BCON;
815 pr_debug(" --> a_wait_bcon\n");
820 isp1301_defer_work(isp, WORK_HOST_RESUME);
824 OTG_IRQ_SRC_REG = DRIVER_SWITCH;
828 usb_bus_start_enum(isp->otg.host,
829 isp->otg.host->otg_port);
832 check_state(isp, __FUNCTION__);
836 static struct platform_device *otg_dev;
838 static int otg_init(struct isp1301 *isp)
843 dump_regs(isp, __FUNCTION__);
844 /* some of these values are board-specific... */
845 OTG_SYSCON_2_REG |= OTG_EN
847 | SRP_GPDATA /* 9msec Bdev D+ pulse */
848 | SRP_GPDVBUS /* discharge after VBUS pulse */
849 // | (3 << 24) /* 2msec VBUS pulse */
851 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
852 | SRP_DPW /* detect 167+ns SRP pulses */
853 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
856 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
857 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
859 check_state(isp, __FUNCTION__);
860 pr_debug("otg: %s, %s %06x\n",
861 state_name(isp), __FUNCTION__, OTG_CTRL_REG);
863 OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG
864 | B_SRP_TMROUT | B_HNP_FAIL
865 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT;
866 OTG_SYSCON_2_REG |= OTG_EN;
871 static int otg_probe(struct platform_device *dev)
873 // struct omap_usb_config *config = dev->platform_data;
879 static int otg_remove(struct platform_device *dev)
885 struct platform_driver omap_otg_driver = {
887 .remove = otg_remove,
889 .owner = THIS_MODULE,
894 static int otg_bind(struct isp1301 *isp)
901 status = platform_driver_register(&omap_otg_driver);
906 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
907 IRQF_DISABLED, DRIVER_NAME, isp);
912 platform_driver_unregister(&omap_otg_driver);
916 static void otg_unbind(struct isp1301 *isp)
920 free_irq(otg_dev->resource[1].start, isp);
925 /* OTG controller isn't clocked */
927 #endif /* CONFIG_USB_OTG */
929 /*-------------------------------------------------------------------------*/
931 static void b_peripheral(struct isp1301 *isp)
933 OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
934 usb_gadget_vbus_connect(isp->otg.gadget);
936 #ifdef CONFIG_USB_OTG
937 enable_vbus_draw(isp, 8);
940 enable_vbus_draw(isp, 100);
941 /* UDC driver just set OTG_BSESSVLD */
942 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
943 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
944 isp->otg.state = OTG_STATE_B_PERIPHERAL;
945 pr_debug(" --> b_peripheral\n");
946 dump_regs(isp, "2periph");
950 static void isp_update_otg(struct isp1301 *isp, u8 stat)
952 u8 isp_stat, isp_bstat;
953 enum usb_otg_state state = isp->otg.state;
955 if (stat & INTR_BDIS_ACON)
956 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
958 /* start certain state transitions right away */
959 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
960 if (isp_stat & INTR_ID_GND) {
961 if (isp->otg.default_a) {
963 case OTG_STATE_B_IDLE:
966 case OTG_STATE_A_IDLE:
967 enable_vbus_source(isp);
969 case OTG_STATE_A_WAIT_VRISE:
970 /* we skip over OTG_STATE_A_WAIT_BCON, since
971 * the HC will transition to A_HOST (or
972 * A_SUSPEND!) without our noticing except
975 if (isp_stat & INTR_VBUS_VLD)
976 isp->otg.state = OTG_STATE_A_HOST;
978 case OTG_STATE_A_WAIT_VFALL:
979 if (!(isp_stat & INTR_SESS_VLD))
980 a_idle(isp, "vfell");
983 if (!(isp_stat & INTR_VBUS_VLD))
984 isp->otg.state = OTG_STATE_A_VBUS_ERR;
987 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
990 case OTG_STATE_B_PERIPHERAL:
991 case OTG_STATE_B_HOST:
992 case OTG_STATE_B_WAIT_ACON:
993 usb_gadget_vbus_disconnect(isp->otg.gadget);
998 if (state != OTG_STATE_A_IDLE)
1000 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1001 isp1301_defer_work(isp, WORK_HOST_RESUME);
1005 /* if user unplugged mini-A end of cable,
1006 * don't bypass A_WAIT_VFALL.
1008 if (isp->otg.default_a) {
1011 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1013 case OTG_STATE_A_WAIT_VFALL:
1014 state = OTG_STATE_A_IDLE;
1015 /* khubd may take a while to notice and
1016 * handle this disconnect, so don't go
1017 * to B_IDLE quite yet.
1020 case OTG_STATE_A_IDLE:
1022 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1024 isp->otg.state = OTG_STATE_B_IDLE;
1025 OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK
1028 case OTG_STATE_B_IDLE:
1032 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1034 switch (isp->otg.state) {
1035 case OTG_STATE_B_PERIPHERAL:
1036 case OTG_STATE_B_WAIT_ACON:
1037 case OTG_STATE_B_HOST:
1038 if (likely(isp_bstat & OTG_B_SESS_VLD))
1040 enable_vbus_draw(isp, 0);
1041 #ifndef CONFIG_USB_OTG
1042 /* UDC driver will clear OTG_BSESSVLD */
1043 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1045 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1047 dump_regs(isp, __FUNCTION__);
1050 case OTG_STATE_B_SRP_INIT:
1051 b_idle(isp, __FUNCTION__);
1052 OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS;
1054 case OTG_STATE_B_IDLE:
1055 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1056 #ifdef CONFIG_USB_OTG
1057 update_otg1(isp, isp_stat);
1058 update_otg2(isp, isp_bstat);
1061 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1062 isp_bstat |= OTG_B_SESS_END;
1064 case OTG_STATE_A_WAIT_VFALL:
1067 pr_debug("otg: unsupported b-device %s\n",
1073 if (state != isp->otg.state)
1074 pr_debug(" isp, %s -> %s\n",
1075 state_string(state), state_name(isp));
1077 #ifdef CONFIG_USB_OTG
1078 /* update the OTG controller state to match the isp1301; may
1079 * trigger OPRT_CHG irqs for changes going to the isp1301.
1081 update_otg1(isp, stat); // pass the actual interrupt latch status
1082 update_otg2(isp, isp_bstat);
1083 check_state(isp, __FUNCTION__);
1086 dump_regs(isp, "isp1301->otg");
1089 /*-------------------------------------------------------------------------*/
1091 static u8 isp1301_clear_latch(struct isp1301 *isp)
1093 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1094 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1099 isp1301_work(struct work_struct *work)
1101 struct isp1301 *isp = container_of(work, struct isp1301, work);
1104 /* implicit lock: we're the only task using this device */
1107 stop = test_bit(WORK_STOP, &isp->todo);
1109 #ifdef CONFIG_USB_OTG
1110 /* transfer state from otg engine to isp1301 */
1111 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1112 otg_update_isp(isp);
1113 put_device(&isp->client->dev);
1116 /* transfer state from isp1301 to otg engine */
1117 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1118 u8 stat = isp1301_clear_latch(isp);
1120 isp_update_otg(isp, stat);
1121 put_device(&isp->client->dev);
1124 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1128 * skip A_WAIT_VRISE; hc transitions invisibly
1129 * skip A_WAIT_BCON; same.
1131 switch (isp->otg.state) {
1132 case OTG_STATE_A_WAIT_BCON:
1133 case OTG_STATE_A_WAIT_VRISE:
1134 isp->otg.state = OTG_STATE_A_HOST;
1135 pr_debug(" --> a_host\n");
1136 otg_ctrl = OTG_CTRL_REG;
1137 otg_ctrl |= OTG_A_BUSREQ;
1138 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1140 OTG_CTRL_REG = otg_ctrl;
1142 case OTG_STATE_B_WAIT_ACON:
1143 isp->otg.state = OTG_STATE_B_HOST;
1144 pr_debug(" --> b_host (acon)\n");
1146 case OTG_STATE_B_HOST:
1147 case OTG_STATE_B_IDLE:
1148 case OTG_STATE_A_IDLE:
1151 pr_debug(" host resume in %s\n",
1156 put_device(&isp->client->dev);
1159 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1161 dump_regs(isp, "timer");
1163 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1165 put_device(&isp->client->dev);
1169 dev_vdbg(&isp->client->dev,
1170 "work done, todo = 0x%lx\n",
1173 dev_dbg(&isp->client->dev, "stop\n");
1176 } while (isp->todo);
1180 static irqreturn_t isp1301_irq(int irq, void *isp)
1182 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1186 static void isp1301_timer(unsigned long _isp)
1188 isp1301_defer_work((void *)_isp, WORK_TIMER);
1191 /*-------------------------------------------------------------------------*/
1193 static void isp1301_release(struct device *dev)
1195 struct i2c_client *client;
1196 struct isp1301 *isp;
1198 client = container_of(dev, struct i2c_client, dev);
1199 isp = i2c_get_clientdata(client);
1201 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1202 if (isp->i2c_release)
1203 isp->i2c_release(dev);
1207 static struct isp1301 *the_transceiver;
1209 static int __exit isp1301_remove(struct i2c_client *client)
1211 struct isp1301 *isp = i2c_get_clientdata(client);
1213 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1214 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1216 if (client->irq > 0)
1217 free_irq(client->irq, isp);
1218 #ifdef CONFIG_USB_OTG
1221 isp->timer.data = 0;
1222 set_bit(WORK_STOP, &isp->todo);
1223 del_timer_sync(&isp->timer);
1224 flush_scheduled_work();
1226 put_device(&client->dev);
1227 the_transceiver = 0;
1232 /*-------------------------------------------------------------------------*/
1234 /* NOTE: three modes are possible here, only one of which
1235 * will be standards-conformant on any given system:
1237 * - OTG mode (dual-role), required if there's a Mini-AB connector
1238 * - HOST mode, for when there's one or more A (host) connectors
1239 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1241 * As a rule, you won't have an isp1301 chip unless it's there to
1242 * support the OTG mode. Other modes help testing USB controllers
1243 * in isolation from (full) OTG support, or maybe so later board
1244 * revisions can help to support those feature.
1247 #ifdef CONFIG_USB_OTG
1249 static int isp1301_otg_enable(struct isp1301 *isp)
1254 /* NOTE: since we don't change this, this provides
1255 * a few more interrupts than are strictly needed.
1257 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1258 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1259 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1260 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1262 dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
1269 /* add or disable the host device+driver */
1271 isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
1273 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1275 if (!otg || isp != the_transceiver)
1285 #ifdef CONFIG_USB_OTG
1286 isp->otg.host = host;
1287 dev_dbg(&isp->client->dev, "registered host\n");
1289 if (isp->otg.gadget)
1290 return isp1301_otg_enable(isp);
1293 #elif !defined(CONFIG_USB_GADGET_OMAP)
1294 // FIXME update its refcount
1295 isp->otg.host = host;
1299 dev_info(&isp->client->dev, "A-Host sessions ok\n");
1300 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1302 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1305 /* If this has a Mini-AB connector, this mode is highly
1306 * nonstandard ... but can be handy for testing, especially with
1307 * the Mini-A end of an OTG cable. (Or something nonstandard
1308 * like MiniB-to-StandardB, maybe built with a gender mender.)
1310 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1312 dump_regs(isp, __FUNCTION__);
1317 dev_dbg(&isp->client->dev, "host sessions not allowed\n");
1324 isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1326 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1328 if (!otg || isp != the_transceiver)
1333 if (!isp->otg.default_a)
1334 enable_vbus_draw(isp, 0);
1335 usb_gadget_vbus_disconnect(isp->otg.gadget);
1336 isp->otg.gadget = 0;
1341 #ifdef CONFIG_USB_OTG
1342 isp->otg.gadget = gadget;
1343 dev_dbg(&isp->client->dev, "registered gadget\n");
1344 /* gadget driver may be suspended until vbus_connect () */
1346 return isp1301_otg_enable(isp);
1349 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1350 isp->otg.gadget = gadget;
1351 // FIXME update its refcount
1353 OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK
1354 & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS))
1357 isp->otg.state = OTG_STATE_B_IDLE;
1360 if (machine_is_omap_h2() || machine_is_omap_h3())
1361 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1363 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1364 INTR_SESS_VLD | INTR_VBUS_VLD);
1365 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1366 INTR_VBUS_VLD | INTR_SESS_VLD);
1367 dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1368 dump_regs(isp, __FUNCTION__);
1370 /* If this has a Mini-AB connector, this mode is highly
1371 * nonstandard ... but can be handy for testing, so long
1372 * as you don't plug a Mini-A cable into the jack.
1374 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1380 dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
1386 /*-------------------------------------------------------------------------*/
1389 isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1391 if (!the_transceiver)
1393 if (dev->state == OTG_STATE_B_PERIPHERAL)
1394 enable_vbus_draw(the_transceiver, mA);
1399 isp1301_start_srp(struct otg_transceiver *dev)
1401 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1404 if (!dev || isp != the_transceiver
1405 || isp->otg.state != OTG_STATE_B_IDLE)
1408 otg_ctrl = OTG_CTRL_REG;
1409 if (!(otg_ctrl & OTG_BSESSEND))
1412 otg_ctrl |= OTG_B_BUSREQ;
1413 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1414 OTG_CTRL_REG = otg_ctrl;
1415 isp->otg.state = OTG_STATE_B_SRP_INIT;
1417 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG);
1418 #ifdef CONFIG_USB_OTG
1419 check_state(isp, __FUNCTION__);
1425 isp1301_start_hnp(struct otg_transceiver *dev)
1427 #ifdef CONFIG_USB_OTG
1428 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1430 if (!dev || isp != the_transceiver)
1432 if (isp->otg.default_a && (isp->otg.host == NULL
1433 || !isp->otg.host->b_hnp_enable))
1435 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1436 || !isp->otg.gadget->b_hnp_enable))
1439 /* We want hardware to manage most HNP protocol timings.
1440 * So do this part as early as possible...
1442 switch (isp->otg.state) {
1443 case OTG_STATE_B_PERIPHERAL:
1444 isp->otg.state = OTG_STATE_B_WAIT_ACON;
1445 isp1301_defer_work(isp, WORK_UPDATE_ISP);
1447 case OTG_STATE_B_HOST:
1448 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1449 /* caller will suspend next */
1451 case OTG_STATE_A_HOST:
1453 /* autoconnect mode avoids irq latency bugs */
1454 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1457 /* caller must suspend then clear A_BUSREQ */
1458 usb_gadget_vbus_connect(isp->otg.gadget);
1459 OTG_CTRL_REG |= OTG_A_SETB_HNPEN;
1462 case OTG_STATE_A_PERIPHERAL:
1463 /* initiated by B-Host suspend */
1468 pr_debug("otg: HNP %s, %06x ...\n",
1469 state_name(isp), OTG_CTRL_REG);
1470 check_state(isp, __FUNCTION__);
1478 /*-------------------------------------------------------------------------*/
1480 /* no error returns, they'd just make bus scanning stop */
1481 static int __init isp1301_probe(struct i2c_client *client)
1484 struct isp1301 *isp;
1486 if (the_transceiver)
1489 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1493 INIT_WORK(&isp->work, isp1301_work);
1494 init_timer(&isp->timer);
1495 isp->timer.function = isp1301_timer;
1496 isp->timer.data = (unsigned long) isp;
1497 isp->client = client;
1499 /* if this is a true probe, verify the chip ... */
1500 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1501 if (status != I2C_VENDOR_ID_PHILIPS) {
1502 dev_dbg(&client->dev, "not philips id: %d\n",
1506 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1507 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1508 dev_dbg(&client->dev, "not isp1301, %d\n",
1514 dev_dbg(&client->dev, "can't attach %s to device, err %d\n",
1515 DRIVER_NAME, status);
1520 isp->i2c_release = client->dev.release;
1521 client->dev.release = isp1301_release;
1523 /* initial development used chiprev 2.00 */
1524 status = i2c_smbus_read_word_data(client, ISP1301_BCD_DEVICE);
1525 dev_info(&client->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1526 status >> 8, status & 0xff);
1528 /* make like power-on reset */
1529 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1531 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1532 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1534 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1535 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1536 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1537 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1539 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1540 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1541 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1543 #ifdef CONFIG_USB_OTG
1544 status = otg_bind(isp);
1546 dev_dbg(&client->dev, "can't bind OTG\n");
1551 status = request_irq(client->irq, isp1301_irq,
1552 IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
1555 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
1556 client->irq, status);
1557 #ifdef CONFIG_USB_OTG
1560 i2c_detach_client(client);
1564 isp->otg.dev = &client->dev;
1565 isp->otg.label = DRIVER_NAME;
1567 isp->otg.set_host = isp1301_set_host,
1568 isp->otg.set_peripheral = isp1301_set_peripheral,
1569 isp->otg.set_power = isp1301_set_power,
1570 isp->otg.start_srp = isp1301_start_srp,
1571 isp->otg.start_hnp = isp1301_start_hnp,
1573 enable_vbus_draw(isp, 0);
1575 the_transceiver = isp;
1577 #ifdef CONFIG_USB_OTG
1578 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1579 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1581 dump_regs(isp, __FUNCTION__);
1584 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1585 dev_dbg(&client->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1588 status = otg_set_transceiver(&isp->otg);
1590 dev_err(&client->dev, "can't register transceiver, %d\n",
1596 static struct i2c_driver isp1301_driver = {
1598 .name = "isp1301_omap",
1600 .probe = isp1301_probe,
1601 .remove = __exit_p(isp1301_remove),
1604 /*-------------------------------------------------------------------------*/
1606 static int __init isp_init(void)
1608 int status = -ENODEV;
1610 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1612 status = i2c_add_driver(&isp1301_driver);
1614 printk(KERN_ERR "%s failed to probe\n", DRIVER_NAME);
1618 module_init(isp_init);
1620 static void __exit isp_exit(void)
1622 if (the_transceiver)
1623 otg_set_transceiver(0);
1624 i2c_del_driver(&isp1301_driver);
1626 module_exit(isp_exit);