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.
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/platform_device.h>
28 #include <linux/gpio.h>
29 #include <linux/usb/ch9.h>
30 #include <linux/usb/gadget.h>
31 #include <linux/usb.h>
32 #include <linux/usb/otg.h>
33 #include <linux/i2c.h>
34 #include <linux/workqueue.h>
37 #include <asm/mach-types.h>
48 #define DRIVER_VERSION "24 August 2004"
49 #define DRIVER_NAME (isp1301_driver.driver.name)
51 MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
52 MODULE_LICENSE("GPL");
55 struct otg_transceiver otg;
56 struct i2c_client *client;
57 void (*i2c_release)(struct device *dev);
64 struct timer_list timer;
66 /* use keventd context to change the state for us */
67 struct work_struct work;
70 # define WORK_UPDATE_ISP 0 /* update ISP from OTG */
71 # define WORK_UPDATE_OTG 1 /* update OTG from ISP */
72 # define WORK_HOST_RESUME 4 /* resume host */
73 # define WORK_TIMER 6 /* timer fired */
74 # define WORK_STOP 7 /* don't resubmit */
78 /* bits in OTG_CTRL */
80 #define OTG_XCEIV_OUTPUTS \
81 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
82 #define OTG_XCEIV_INPUTS \
83 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
84 #define OTG_CTRL_BITS \
85 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
86 /* and OTG_PULLUP is sometimes written */
88 #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
89 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
93 /*-------------------------------------------------------------------------*/
95 /* board-specific PM hooks */
97 #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
99 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
101 #include <linux/i2c/tps65010.h>
105 static inline int tps65010_set_vbus_draw(unsigned mA)
107 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
113 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
115 int status = tps65010_set_vbus_draw(mA);
117 pr_debug(" VBUS %d mA error %d\n", mA, status);
122 static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
124 /* H4 controls this by DIP switch S2.4; no soft control.
125 * ON means the charger is always enabled. Leave it OFF
126 * unless the OTG port is used only in B-peripheral mode.
132 static void enable_vbus_source(struct isp1301 *isp)
134 /* this board won't supply more than 8mA vbus power.
135 * some boards can switch a 100ma "unit load" (or more).
140 /* products will deliver OTG messages with LEDs, GUI, etc */
141 static inline void notresponding(struct isp1301 *isp)
143 printk(KERN_NOTICE "OTG device not responding.\n");
147 /*-------------------------------------------------------------------------*/
149 static struct i2c_driver isp1301_driver;
151 /* smbus apis are used for portability */
154 isp1301_get_u8(struct isp1301 *isp, u8 reg)
156 return i2c_smbus_read_byte_data(isp->client, reg + 0);
160 isp1301_get_u16(struct isp1301 *isp, u8 reg)
162 return i2c_smbus_read_word_data(isp->client, reg);
166 isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
168 return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
172 isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
174 return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
177 /*-------------------------------------------------------------------------*/
180 #define ISP1301_VENDOR_ID 0x00 /* u16 read */
181 #define ISP1301_PRODUCT_ID 0x02 /* u16 read */
182 #define ISP1301_BCD_DEVICE 0x14 /* u16 read */
184 #define I2C_VENDOR_ID_PHILIPS 0x04cc
185 #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
187 /* operational registers */
188 #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
189 # define MC1_SPEED (1 << 0)
190 # define MC1_SUSPEND (1 << 1)
191 # define MC1_DAT_SE0 (1 << 2)
192 # define MC1_TRANSPARENT (1 << 3)
193 # define MC1_BDIS_ACON_EN (1 << 4)
194 # define MC1_OE_INT_EN (1 << 5)
195 # define MC1_UART_EN (1 << 6)
196 # define MC1_MASK 0x7f
197 #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
198 # define MC2_GLOBAL_PWR_DN (1 << 0)
199 # define MC2_SPD_SUSP_CTRL (1 << 1)
200 # define MC2_BI_DI (1 << 2)
201 # define MC2_TRANSP_BDIR0 (1 << 3)
202 # define MC2_TRANSP_BDIR1 (1 << 4)
203 # define MC2_AUDIO_EN (1 << 5)
204 # define MC2_PSW_EN (1 << 6)
205 # define MC2_EN2V7 (1 << 7)
206 #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
207 # define OTG1_DP_PULLUP (1 << 0)
208 # define OTG1_DM_PULLUP (1 << 1)
209 # define OTG1_DP_PULLDOWN (1 << 2)
210 # define OTG1_DM_PULLDOWN (1 << 3)
211 # define OTG1_ID_PULLDOWN (1 << 4)
212 # define OTG1_VBUS_DRV (1 << 5)
213 # define OTG1_VBUS_DISCHRG (1 << 6)
214 # define OTG1_VBUS_CHRG (1 << 7)
215 #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
216 # define OTG_B_SESS_END (1 << 6)
217 # define OTG_B_SESS_VLD (1 << 7)
219 #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
220 #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
222 #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
223 #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
225 /* same bitfields in all interrupt registers */
226 # define INTR_VBUS_VLD (1 << 0)
227 # define INTR_SESS_VLD (1 << 1)
228 # define INTR_DP_HI (1 << 2)
229 # define INTR_ID_GND (1 << 3)
230 # define INTR_DM_HI (1 << 4)
231 # define INTR_ID_FLOAT (1 << 5)
232 # define INTR_BDIS_ACON (1 << 6)
233 # define INTR_CR_INT (1 << 7)
235 /*-------------------------------------------------------------------------*/
237 static inline const char *state_name(struct isp1301 *isp)
239 return otg_state_string(isp->otg.state);
242 /*-------------------------------------------------------------------------*/
244 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
245 * not everything is guarded by board-specific checks, or even using
246 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
248 * ALSO: this currently doesn't use ISP1301 low-power modes
249 * while OTG is running.
252 static void power_down(struct isp1301 *isp)
254 isp->otg.state = OTG_STATE_UNDEFINED;
256 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
257 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
259 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
260 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
263 static void power_up(struct isp1301 *isp)
265 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
266 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
268 /* do this only when cpu is driving transceiver,
269 * so host won't see a low speed device...
271 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
274 #define NO_HOST_SUSPEND
276 static int host_suspend(struct isp1301 *isp)
278 #ifdef NO_HOST_SUSPEND
286 /* Currently ASSUMES only the OTG port matters;
287 * other ports could be active...
289 dev = isp->otg.host->controller;
290 return dev->driver->suspend(dev, 3, 0);
294 static int host_resume(struct isp1301 *isp)
296 #ifdef NO_HOST_SUSPEND
304 dev = isp->otg.host->controller;
305 return dev->driver->resume(dev, 0);
309 static int gadget_suspend(struct isp1301 *isp)
311 isp->otg.gadget->b_hnp_enable = 0;
312 isp->otg.gadget->a_hnp_support = 0;
313 isp->otg.gadget->a_alt_hnp_support = 0;
314 return usb_gadget_vbus_disconnect(isp->otg.gadget);
317 /*-------------------------------------------------------------------------*/
319 #define TIMER_MINUTES 10
320 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
322 /* Almost all our I2C messaging comes from a work queue's task context.
323 * NOTE: guaranteeing certain response times might mean we shouldn't
324 * share keventd's work queue; a realtime task might be safest.
326 static void isp1301_defer_work(struct isp1301 *isp, int work)
330 if (isp && !test_and_set_bit(work, &isp->todo)) {
331 (void) get_device(&isp->client->dev);
332 status = schedule_work(&isp->work);
333 if (!status && !isp->working)
334 dev_vdbg(&isp->client->dev,
335 "work item %d may be lost\n", work);
339 /* called from irq handlers */
340 static void a_idle(struct isp1301 *isp, const char *tag)
344 if (isp->otg.state == OTG_STATE_A_IDLE)
347 isp->otg.default_a = 1;
349 isp->otg.host->is_b_host = 0;
352 if (isp->otg.gadget) {
353 isp->otg.gadget->is_a_peripheral = 1;
356 isp->otg.state = OTG_STATE_A_IDLE;
357 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
358 omap_writel(l, OTG_CTRL);
359 isp->last_otg_ctrl = l;
360 pr_debug(" --> %s/%s\n", state_name(isp), tag);
363 /* called from irq handlers */
364 static void b_idle(struct isp1301 *isp, const char *tag)
368 if (isp->otg.state == OTG_STATE_B_IDLE)
371 isp->otg.default_a = 0;
373 isp->otg.host->is_b_host = 1;
376 if (isp->otg.gadget) {
377 isp->otg.gadget->is_a_peripheral = 0;
380 isp->otg.state = OTG_STATE_B_IDLE;
381 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
382 omap_writel(l, OTG_CTRL);
383 isp->last_otg_ctrl = l;
384 pr_debug(" --> %s/%s\n", state_name(isp), tag);
388 dump_regs(struct isp1301 *isp, const char *label)
391 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
392 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
393 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
395 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
396 omap_readl(OTG_CTRL), label, state_name(isp),
398 /* mode control and irq enables don't change much */
402 /*-------------------------------------------------------------------------*/
404 #ifdef CONFIG_USB_OTG
407 * The OMAP OTG controller handles most of the OTG state transitions.
409 * We translate isp1301 outputs (mostly voltage comparator status) into
410 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
411 * flags into isp1301 inputs ... and infer state transitions.
416 static void check_state(struct isp1301 *isp, const char *tag)
418 enum usb_otg_state state = OTG_STATE_UNDEFINED;
419 u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
426 state = OTG_STATE_B_IDLE;
432 state = OTG_STATE_B_PERIPHERAL;
435 state = OTG_STATE_B_SRP_INIT;
438 /* extra dual-role default-b states */
444 state = OTG_STATE_B_WAIT_ACON;
447 state = OTG_STATE_B_HOST;
452 state = OTG_STATE_A_IDLE;
455 state = OTG_STATE_A_WAIT_VFALL;
458 state = OTG_STATE_A_VBUS_ERR;
464 state = OTG_STATE_A_PERIPHERAL;
467 state = OTG_STATE_A_WAIT_VRISE;
470 state = OTG_STATE_A_WAIT_BCON;
473 state = OTG_STATE_A_HOST;
476 state = OTG_STATE_A_SUSPEND;
481 if (isp->otg.state == state && !extra)
483 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
484 otg_state_string(state), fsm, state_name(isp),
485 omap_readl(OTG_CTRL));
490 static inline void check_state(struct isp1301 *isp, const char *tag) { }
494 /* outputs from ISP1301_INTERRUPT_SOURCE */
495 static void update_otg1(struct isp1301 *isp, u8 int_src)
499 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
500 otg_ctrl &= ~OTG_XCEIV_INPUTS;
501 otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
503 if (int_src & INTR_SESS_VLD)
504 otg_ctrl |= OTG_ASESSVLD;
505 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
506 a_idle(isp, "vfall");
507 otg_ctrl &= ~OTG_CTRL_BITS;
509 if (int_src & INTR_VBUS_VLD)
510 otg_ctrl |= OTG_VBUSVLD;
511 if (int_src & INTR_ID_GND) { /* default-A */
512 if (isp->otg.state == OTG_STATE_B_IDLE
513 || isp->otg.state == OTG_STATE_UNDEFINED) {
517 } else { /* default-B */
519 if (isp->otg.state == OTG_STATE_A_IDLE
520 || isp->otg.state == OTG_STATE_UNDEFINED) {
525 omap_writel(otg_ctrl, OTG_CTRL);
528 /* outputs from ISP1301_OTG_STATUS */
529 static void update_otg2(struct isp1301 *isp, u8 otg_status)
533 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
534 otg_ctrl &= ~OTG_XCEIV_INPUTS;
535 otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
536 if (otg_status & OTG_B_SESS_VLD)
537 otg_ctrl |= OTG_BSESSVLD;
538 else if (otg_status & OTG_B_SESS_END)
539 otg_ctrl |= OTG_BSESSEND;
540 omap_writel(otg_ctrl, OTG_CTRL);
543 /* inputs going to ISP1301 */
544 static void otg_update_isp(struct isp1301 *isp)
546 u32 otg_ctrl, otg_change;
547 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
549 otg_ctrl = omap_readl(OTG_CTRL);
550 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
551 isp->last_otg_ctrl = otg_ctrl;
552 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
554 switch (isp->otg.state) {
555 case OTG_STATE_B_IDLE:
556 case OTG_STATE_B_PERIPHERAL:
557 case OTG_STATE_B_SRP_INIT:
558 if (!(otg_ctrl & OTG_PULLUP)) {
559 // if (otg_ctrl & OTG_B_HNPEN) {
560 if (isp->otg.gadget->b_hnp_enable) {
561 isp->otg.state = OTG_STATE_B_WAIT_ACON;
562 pr_debug(" --> b_wait_acon\n");
567 set |= OTG1_DP_PULLUP;
568 clr |= OTG1_DP_PULLDOWN;
570 case OTG_STATE_A_SUSPEND:
571 case OTG_STATE_A_PERIPHERAL:
572 if (otg_ctrl & OTG_PULLUP)
575 // case OTG_STATE_B_WAIT_ACON:
578 set |= OTG1_DP_PULLDOWN;
579 clr |= OTG1_DP_PULLUP;
583 # define toggle(OTG,ISP) do { \
584 if (otg_ctrl & OTG) set |= ISP; \
588 if (!(isp->otg.host))
589 otg_ctrl &= ~OTG_DRV_VBUS;
591 switch (isp->otg.state) {
592 case OTG_STATE_A_SUSPEND:
593 if (otg_ctrl & OTG_DRV_VBUS) {
594 set |= OTG1_VBUS_DRV;
597 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
601 case OTG_STATE_A_VBUS_ERR:
602 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
603 pr_debug(" --> a_wait_vfall\n");
605 case OTG_STATE_A_WAIT_VFALL:
606 /* FIXME usbcore thinks port power is still on ... */
607 clr |= OTG1_VBUS_DRV;
609 case OTG_STATE_A_IDLE:
610 if (otg_ctrl & OTG_DRV_VBUS) {
611 isp->otg.state = OTG_STATE_A_WAIT_VRISE;
612 pr_debug(" --> a_wait_vrise\n");
616 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
619 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
620 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
624 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
625 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
627 /* HNP switch to host or peripheral; and SRP */
628 if (otg_change & OTG_PULLUP) {
631 switch (isp->otg.state) {
632 case OTG_STATE_B_IDLE:
633 if (clr & OTG1_DP_PULLUP)
635 isp->otg.state = OTG_STATE_B_PERIPHERAL;
636 pr_debug(" --> b_peripheral\n");
638 case OTG_STATE_A_SUSPEND:
639 if (clr & OTG1_DP_PULLUP)
641 isp->otg.state = OTG_STATE_A_PERIPHERAL;
642 pr_debug(" --> a_peripheral\n");
647 l = omap_readl(OTG_CTRL);
649 omap_writel(l, OTG_CTRL);
652 check_state(isp, __func__);
653 dump_regs(isp, "otg->isp1301");
656 static irqreturn_t omap_otg_irq(int irq, void *_isp)
658 u16 otg_irq = omap_readw(OTG_IRQ_SRC);
661 struct isp1301 *isp = _isp;
663 /* update ISP1301 transceiver from OTG controller */
664 if (otg_irq & OPRT_CHG) {
665 omap_writew(OPRT_CHG, OTG_IRQ_SRC);
666 isp1301_defer_work(isp, WORK_UPDATE_ISP);
669 /* SRP to become b_peripheral failed */
670 } else if (otg_irq & B_SRP_TMROUT) {
671 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
674 /* gadget drivers that care should monitor all kinds of
675 * remote wakeup (SRP, normal) using their own timer
676 * to give "check cable and A-device" messages.
678 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
679 b_idle(isp, "srp_timeout");
681 omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
684 /* HNP to become b_host failed */
685 } else if (otg_irq & B_HNP_FAIL) {
686 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
687 state_name(isp), omap_readl(OTG_CTRL));
690 otg_ctrl = omap_readl(OTG_CTRL);
691 otg_ctrl |= OTG_BUSDROP;
692 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
693 omap_writel(otg_ctrl, OTG_CTRL);
695 /* subset of b_peripheral()... */
696 isp->otg.state = OTG_STATE_B_PERIPHERAL;
697 pr_debug(" --> b_peripheral\n");
699 omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
702 /* detect SRP from B-device ... */
703 } else if (otg_irq & A_SRP_DETECT) {
704 pr_debug("otg: %s SRP_DETECT, %06x\n",
705 state_name(isp), omap_readl(OTG_CTRL));
707 isp1301_defer_work(isp, WORK_UPDATE_OTG);
708 switch (isp->otg.state) {
709 case OTG_STATE_A_IDLE:
712 isp1301_defer_work(isp, WORK_HOST_RESUME);
713 otg_ctrl = omap_readl(OTG_CTRL);
714 otg_ctrl |= OTG_A_BUSREQ;
715 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
718 omap_writel(otg_ctrl, OTG_CTRL);
724 omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
727 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
728 * we don't track them separately
730 } else if (otg_irq & A_REQ_TMROUT) {
731 otg_ctrl = omap_readl(OTG_CTRL);
732 pr_info("otg: BCON_TMOUT from %s, %06x\n",
733 state_name(isp), otg_ctrl);
736 otg_ctrl |= OTG_BUSDROP;
737 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
738 omap_writel(otg_ctrl, OTG_CTRL);
739 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
741 omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
744 /* A-supplied voltage fell too low; overcurrent */
745 } else if (otg_irq & A_VBUS_ERR) {
746 otg_ctrl = omap_readl(OTG_CTRL);
747 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
748 state_name(isp), otg_irq, otg_ctrl);
750 otg_ctrl |= OTG_BUSDROP;
751 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
752 omap_writel(otg_ctrl, OTG_CTRL);
753 isp->otg.state = OTG_STATE_A_VBUS_ERR;
755 omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
758 /* switch driver; the transceiver code activates it,
759 * ungating the udc clock or resuming OHCI.
761 } else if (otg_irq & DRIVER_SWITCH) {
764 otg_ctrl = omap_readl(OTG_CTRL);
765 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
767 (otg_ctrl & OTG_DRIVER_SEL)
770 isp1301_defer_work(isp, WORK_UPDATE_ISP);
772 /* role is peripheral */
773 if (otg_ctrl & OTG_DRIVER_SEL) {
774 switch (isp->otg.state) {
775 case OTG_STATE_A_IDLE:
776 b_idle(isp, __func__);
781 isp1301_defer_work(isp, WORK_UPDATE_ISP);
785 if (!(otg_ctrl & OTG_ID)) {
786 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
787 omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
791 switch (isp->otg.state) {
792 case OTG_STATE_B_WAIT_ACON:
793 isp->otg.state = OTG_STATE_B_HOST;
794 pr_debug(" --> b_host\n");
797 case OTG_STATE_A_WAIT_BCON:
798 isp->otg.state = OTG_STATE_A_HOST;
799 pr_debug(" --> a_host\n");
801 case OTG_STATE_A_PERIPHERAL:
802 isp->otg.state = OTG_STATE_A_WAIT_BCON;
803 pr_debug(" --> a_wait_bcon\n");
808 isp1301_defer_work(isp, WORK_HOST_RESUME);
812 omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
816 usb_bus_start_enum(isp->otg.host,
817 isp->otg.host->otg_port);
820 check_state(isp, __func__);
824 static struct platform_device *otg_dev;
826 static int isp1301_otg_init(struct isp1301 *isp)
833 dump_regs(isp, __func__);
834 /* some of these values are board-specific... */
835 l = omap_readl(OTG_SYSCON_2);
838 | SRP_GPDATA /* 9msec Bdev D+ pulse */
839 | SRP_GPDVBUS /* discharge after VBUS pulse */
840 // | (3 << 24) /* 2msec VBUS pulse */
842 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
843 | SRP_DPW /* detect 167+ns SRP pulses */
844 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
846 omap_writel(l, OTG_SYSCON_2);
848 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
849 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
851 check_state(isp, __func__);
852 pr_debug("otg: %s, %s %06x\n",
853 state_name(isp), __func__, omap_readl(OTG_CTRL));
855 omap_writew(DRIVER_SWITCH | OPRT_CHG
856 | B_SRP_TMROUT | B_HNP_FAIL
857 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
859 l = omap_readl(OTG_SYSCON_2);
861 omap_writel(l, OTG_SYSCON_2);
866 static int otg_probe(struct platform_device *dev)
868 // struct omap_usb_config *config = dev->platform_data;
874 static int otg_remove(struct platform_device *dev)
880 static struct platform_driver omap_otg_driver = {
882 .remove = otg_remove,
884 .owner = THIS_MODULE,
889 static int otg_bind(struct isp1301 *isp)
896 status = platform_driver_register(&omap_otg_driver);
901 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
902 0, DRIVER_NAME, isp);
907 platform_driver_unregister(&omap_otg_driver);
911 static void otg_unbind(struct isp1301 *isp)
915 free_irq(otg_dev->resource[1].start, isp);
920 /* OTG controller isn't clocked */
922 #endif /* CONFIG_USB_OTG */
924 /*-------------------------------------------------------------------------*/
926 static void b_peripheral(struct isp1301 *isp)
930 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
931 omap_writel(l, OTG_CTRL);
933 usb_gadget_vbus_connect(isp->otg.gadget);
935 #ifdef CONFIG_USB_OTG
936 enable_vbus_draw(isp, 8);
939 enable_vbus_draw(isp, 100);
940 /* UDC driver just set OTG_BSESSVLD */
941 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
942 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
943 isp->otg.state = OTG_STATE_B_PERIPHERAL;
944 pr_debug(" --> b_peripheral\n");
945 dump_regs(isp, "2periph");
949 static void isp_update_otg(struct isp1301 *isp, u8 stat)
951 u8 isp_stat, isp_bstat;
952 enum usb_otg_state state = isp->otg.state;
954 if (stat & INTR_BDIS_ACON)
955 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
957 /* start certain state transitions right away */
958 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
959 if (isp_stat & INTR_ID_GND) {
960 if (isp->otg.default_a) {
962 case OTG_STATE_B_IDLE:
965 case OTG_STATE_A_IDLE:
966 enable_vbus_source(isp);
968 case OTG_STATE_A_WAIT_VRISE:
969 /* we skip over OTG_STATE_A_WAIT_BCON, since
970 * the HC will transition to A_HOST (or
971 * A_SUSPEND!) without our noticing except
974 if (isp_stat & INTR_VBUS_VLD)
975 isp->otg.state = OTG_STATE_A_HOST;
977 case OTG_STATE_A_WAIT_VFALL:
978 if (!(isp_stat & INTR_SESS_VLD))
979 a_idle(isp, "vfell");
982 if (!(isp_stat & INTR_VBUS_VLD))
983 isp->otg.state = OTG_STATE_A_VBUS_ERR;
986 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
989 case OTG_STATE_B_PERIPHERAL:
990 case OTG_STATE_B_HOST:
991 case OTG_STATE_B_WAIT_ACON:
992 usb_gadget_vbus_disconnect(isp->otg.gadget);
997 if (state != OTG_STATE_A_IDLE)
999 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1000 isp1301_defer_work(isp, WORK_HOST_RESUME);
1006 /* if user unplugged mini-A end of cable,
1007 * don't bypass A_WAIT_VFALL.
1009 if (isp->otg.default_a) {
1012 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1014 case OTG_STATE_A_WAIT_VFALL:
1015 state = OTG_STATE_A_IDLE;
1016 /* khubd may take a while to notice and
1017 * handle this disconnect, so don't go
1018 * to B_IDLE quite yet.
1021 case OTG_STATE_A_IDLE:
1023 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1025 isp->otg.state = OTG_STATE_B_IDLE;
1026 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1027 l &= ~OTG_CTRL_BITS;
1028 omap_writel(l, OTG_CTRL);
1030 case OTG_STATE_B_IDLE:
1034 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1036 switch (isp->otg.state) {
1037 case OTG_STATE_B_PERIPHERAL:
1038 case OTG_STATE_B_WAIT_ACON:
1039 case OTG_STATE_B_HOST:
1040 if (likely(isp_bstat & OTG_B_SESS_VLD))
1042 enable_vbus_draw(isp, 0);
1043 #ifndef CONFIG_USB_OTG
1044 /* UDC driver will clear OTG_BSESSVLD */
1045 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1047 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1049 dump_regs(isp, __func__);
1052 case OTG_STATE_B_SRP_INIT:
1053 b_idle(isp, __func__);
1054 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
1055 omap_writel(l, OTG_CTRL);
1057 case OTG_STATE_B_IDLE:
1058 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1059 #ifdef CONFIG_USB_OTG
1060 update_otg1(isp, isp_stat);
1061 update_otg2(isp, isp_bstat);
1064 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1065 isp_bstat |= OTG_B_SESS_END;
1067 case OTG_STATE_A_WAIT_VFALL:
1070 pr_debug("otg: unsupported b-device %s\n",
1076 if (state != isp->otg.state)
1077 pr_debug(" isp, %s -> %s\n",
1078 otg_state_string(state), state_name(isp));
1080 #ifdef CONFIG_USB_OTG
1081 /* update the OTG controller state to match the isp1301; may
1082 * trigger OPRT_CHG irqs for changes going to the isp1301.
1084 update_otg1(isp, isp_stat);
1085 update_otg2(isp, isp_bstat);
1086 check_state(isp, __func__);
1089 dump_regs(isp, "isp1301->otg");
1092 /*-------------------------------------------------------------------------*/
1094 static u8 isp1301_clear_latch(struct isp1301 *isp)
1096 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1097 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1102 isp1301_work(struct work_struct *work)
1104 struct isp1301 *isp = container_of(work, struct isp1301, work);
1107 /* implicit lock: we're the only task using this device */
1110 stop = test_bit(WORK_STOP, &isp->todo);
1112 #ifdef CONFIG_USB_OTG
1113 /* transfer state from otg engine to isp1301 */
1114 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1115 otg_update_isp(isp);
1116 put_device(&isp->client->dev);
1119 /* transfer state from isp1301 to otg engine */
1120 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1121 u8 stat = isp1301_clear_latch(isp);
1123 isp_update_otg(isp, stat);
1124 put_device(&isp->client->dev);
1127 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1131 * skip A_WAIT_VRISE; hc transitions invisibly
1132 * skip A_WAIT_BCON; same.
1134 switch (isp->otg.state) {
1135 case OTG_STATE_A_WAIT_BCON:
1136 case OTG_STATE_A_WAIT_VRISE:
1137 isp->otg.state = OTG_STATE_A_HOST;
1138 pr_debug(" --> a_host\n");
1139 otg_ctrl = omap_readl(OTG_CTRL);
1140 otg_ctrl |= OTG_A_BUSREQ;
1141 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1143 omap_writel(otg_ctrl, OTG_CTRL);
1145 case OTG_STATE_B_WAIT_ACON:
1146 isp->otg.state = OTG_STATE_B_HOST;
1147 pr_debug(" --> b_host (acon)\n");
1149 case OTG_STATE_B_HOST:
1150 case OTG_STATE_B_IDLE:
1151 case OTG_STATE_A_IDLE:
1154 pr_debug(" host resume in %s\n",
1159 put_device(&isp->client->dev);
1162 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1164 dump_regs(isp, "timer");
1166 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1168 put_device(&isp->client->dev);
1172 dev_vdbg(&isp->client->dev,
1173 "work done, todo = 0x%lx\n",
1176 dev_dbg(&isp->client->dev, "stop\n");
1179 } while (isp->todo);
1183 static irqreturn_t isp1301_irq(int irq, void *isp)
1185 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1189 static void isp1301_timer(unsigned long _isp)
1191 isp1301_defer_work((void *)_isp, WORK_TIMER);
1194 /*-------------------------------------------------------------------------*/
1196 static void isp1301_release(struct device *dev)
1198 struct isp1301 *isp;
1200 isp = dev_get_drvdata(dev);
1202 /* FIXME -- not with a "new style" driver, it doesn't!! */
1204 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1205 if (isp->i2c_release)
1206 isp->i2c_release(dev);
1210 static struct isp1301 *the_transceiver;
1212 static int __exit isp1301_remove(struct i2c_client *i2c)
1214 struct isp1301 *isp;
1216 isp = i2c_get_clientdata(i2c);
1218 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1219 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1220 free_irq(i2c->irq, isp);
1221 #ifdef CONFIG_USB_OTG
1224 if (machine_is_omap_h2())
1227 isp->timer.data = 0;
1228 set_bit(WORK_STOP, &isp->todo);
1229 del_timer_sync(&isp->timer);
1230 flush_work_sync(&isp->work);
1232 put_device(&i2c->dev);
1233 the_transceiver = NULL;
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)
1258 isp1301_otg_init(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)
1285 omap_writew(0, OTG_IRQ_EN);
1287 isp->otg.host = NULL;
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 if (machine_is_omap_h2())
1306 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1308 dev_info(&isp->client->dev, "A-Host sessions ok\n");
1309 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1311 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1314 /* If this has a Mini-AB connector, this mode is highly
1315 * nonstandard ... but can be handy for testing, especially with
1316 * the Mini-A end of an OTG cable. (Or something nonstandard
1317 * like MiniB-to-StandardB, maybe built with a gender mender.)
1319 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1321 dump_regs(isp, __func__);
1326 dev_dbg(&isp->client->dev, "host sessions not allowed\n");
1333 isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1335 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1336 #ifndef CONFIG_USB_OTG
1340 if (!otg || isp != the_transceiver)
1344 omap_writew(0, OTG_IRQ_EN);
1345 if (!isp->otg.default_a)
1346 enable_vbus_draw(isp, 0);
1347 usb_gadget_vbus_disconnect(isp->otg.gadget);
1348 isp->otg.gadget = NULL;
1353 #ifdef CONFIG_USB_OTG
1354 isp->otg.gadget = gadget;
1355 dev_dbg(&isp->client->dev, "registered gadget\n");
1356 /* gadget driver may be suspended until vbus_connect () */
1358 return isp1301_otg_enable(isp);
1361 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1362 isp->otg.gadget = gadget;
1363 // FIXME update its refcount
1365 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1366 l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
1368 omap_writel(l, OTG_CTRL);
1371 isp->otg.state = OTG_STATE_B_IDLE;
1373 if (machine_is_omap_h2() || machine_is_omap_h3())
1374 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1376 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1378 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1380 dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1381 dump_regs(isp, __func__);
1383 /* If this has a Mini-AB connector, this mode is highly
1384 * nonstandard ... but can be handy for testing, so long
1385 * as you don't plug a Mini-A cable into the jack.
1387 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1393 dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
1399 /*-------------------------------------------------------------------------*/
1402 isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1404 if (!the_transceiver)
1406 if (dev->state == OTG_STATE_B_PERIPHERAL)
1407 enable_vbus_draw(the_transceiver, mA);
1412 isp1301_start_srp(struct otg_transceiver *dev)
1414 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1417 if (!dev || isp != the_transceiver
1418 || isp->otg.state != OTG_STATE_B_IDLE)
1421 otg_ctrl = omap_readl(OTG_CTRL);
1422 if (!(otg_ctrl & OTG_BSESSEND))
1425 otg_ctrl |= OTG_B_BUSREQ;
1426 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1427 omap_writel(otg_ctrl, OTG_CTRL);
1428 isp->otg.state = OTG_STATE_B_SRP_INIT;
1430 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
1431 omap_readl(OTG_CTRL));
1432 #ifdef CONFIG_USB_OTG
1433 check_state(isp, __func__);
1439 isp1301_start_hnp(struct otg_transceiver *dev)
1441 #ifdef CONFIG_USB_OTG
1442 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1445 if (!dev || isp != the_transceiver)
1447 if (isp->otg.default_a && (isp->otg.host == NULL
1448 || !isp->otg.host->b_hnp_enable))
1450 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1451 || !isp->otg.gadget->b_hnp_enable))
1454 /* We want hardware to manage most HNP protocol timings.
1455 * So do this part as early as possible...
1457 switch (isp->otg.state) {
1458 case OTG_STATE_B_HOST:
1459 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1460 /* caller will suspend next */
1462 case OTG_STATE_A_HOST:
1464 /* autoconnect mode avoids irq latency bugs */
1465 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1468 /* caller must suspend then clear A_BUSREQ */
1469 usb_gadget_vbus_connect(isp->otg.gadget);
1470 l = omap_readl(OTG_CTRL);
1471 l |= OTG_A_SETB_HNPEN;
1472 omap_writel(l, OTG_CTRL);
1475 case OTG_STATE_A_PERIPHERAL:
1476 /* initiated by B-Host suspend */
1481 pr_debug("otg: HNP %s, %06x ...\n",
1482 state_name(isp), omap_readl(OTG_CTRL));
1483 check_state(isp, __func__);
1491 /*-------------------------------------------------------------------------*/
1493 static int __devinit
1494 isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
1497 struct isp1301 *isp;
1499 if (the_transceiver)
1502 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1506 INIT_WORK(&isp->work, isp1301_work);
1507 init_timer(&isp->timer);
1508 isp->timer.function = isp1301_timer;
1509 isp->timer.data = (unsigned long) isp;
1511 i2c_set_clientdata(i2c, isp);
1514 /* verify the chip (shouldn't be necessary) */
1515 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1516 if (status != I2C_VENDOR_ID_PHILIPS) {
1517 dev_dbg(&i2c->dev, "not philips id: %d\n", status);
1520 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1521 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1522 dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
1525 isp->i2c_release = i2c->dev.release;
1526 i2c->dev.release = isp1301_release;
1528 /* initial development used chiprev 2.00 */
1529 status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
1530 dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1531 status >> 8, status & 0xff);
1533 /* make like power-on reset */
1534 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1536 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1537 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1539 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1540 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1541 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1542 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1544 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1545 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1546 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1548 #ifdef CONFIG_USB_OTG
1549 status = otg_bind(isp);
1551 dev_dbg(&i2c->dev, "can't bind OTG\n");
1556 if (machine_is_omap_h2()) {
1557 /* full speed signaling by default */
1558 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1560 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
1563 /* IRQ wired at M14 */
1564 omap_cfg_reg(M14_1510_GPIO2);
1565 if (gpio_request(2, "isp1301") == 0)
1566 gpio_direction_input(2);
1567 isp->irq_type = IRQF_TRIGGER_FALLING;
1570 isp->irq_type |= IRQF_SAMPLE_RANDOM;
1571 status = request_irq(i2c->irq, isp1301_irq,
1572 isp->irq_type, DRIVER_NAME, isp);
1574 dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1579 isp->otg.dev = &i2c->dev;
1580 isp->otg.label = DRIVER_NAME;
1582 isp->otg.set_host = isp1301_set_host,
1583 isp->otg.set_peripheral = isp1301_set_peripheral,
1584 isp->otg.set_power = isp1301_set_power,
1585 isp->otg.start_srp = isp1301_start_srp,
1586 isp->otg.start_hnp = isp1301_start_hnp,
1588 enable_vbus_draw(isp, 0);
1590 the_transceiver = isp;
1592 #ifdef CONFIG_USB_OTG
1593 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1594 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1597 dump_regs(isp, __func__);
1600 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1601 dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1604 status = otg_set_transceiver(&isp->otg);
1606 dev_err(&i2c->dev, "can't register transceiver, %d\n",
1616 static const struct i2c_device_id isp1301_id[] = {
1617 { "isp1301_omap", 0 },
1620 MODULE_DEVICE_TABLE(i2c, isp1301_id);
1622 static struct i2c_driver isp1301_driver = {
1624 .name = "isp1301_omap",
1626 .probe = isp1301_probe,
1627 .remove = __exit_p(isp1301_remove),
1628 .id_table = isp1301_id,
1631 /*-------------------------------------------------------------------------*/
1633 static int __init isp_init(void)
1635 return i2c_add_driver(&isp1301_driver);
1637 subsys_initcall(isp_init);
1639 static void __exit isp_exit(void)
1641 if (the_transceiver)
1642 otg_set_transceiver(NULL);
1643 i2c_del_driver(&isp1301_driver);
1645 module_exit(isp_exit);