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/usb/ch9.h>
29 #include <linux/usb/gadget.h>
30 #include <linux/usb.h>
31 #include <linux/usb/otg.h>
32 #include <linux/i2c.h>
33 #include <linux/workqueue.h>
36 #include <asm/arch/usb.h>
44 #define DRIVER_VERSION "24 August 2004"
45 #define DRIVER_NAME (isp1301_driver.driver.name)
47 MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
48 MODULE_LICENSE("GPL");
51 struct otg_transceiver otg
;
52 struct i2c_client client
;
53 void (*i2c_release
)(struct device
*dev
);
61 struct timer_list timer
;
63 /* use keventd context to change the state for us */
64 struct work_struct work
;
67 # define WORK_UPDATE_ISP 0 /* update ISP from OTG */
68 # define WORK_UPDATE_OTG 1 /* update OTG from ISP */
69 # define WORK_HOST_RESUME 4 /* resume host */
70 # define WORK_TIMER 6 /* timer fired */
71 # define WORK_STOP 7 /* don't resubmit */
75 /* bits in OTG_CTRL_REG */
77 #define OTG_XCEIV_OUTPUTS \
78 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
79 #define OTG_XCEIV_INPUTS \
80 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
81 #define OTG_CTRL_BITS \
82 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
83 /* and OTG_PULLUP is sometimes written */
85 #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
86 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
90 /*-------------------------------------------------------------------------*/
92 #ifdef CONFIG_MACH_OMAP_H2
94 /* board-specific PM hooks */
97 #include <asm/arch/mux.h>
98 #include <asm/mach-types.h>
101 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
103 #include <asm/arch/tps65010.h>
107 static inline int tps65010_set_vbus_draw(unsigned mA
)
109 pr_debug("tps65010: draw %d mA (STUB)\n", mA
);
115 static void enable_vbus_draw(struct isp1301
*isp
, unsigned mA
)
117 int status
= tps65010_set_vbus_draw(mA
);
119 pr_debug(" VBUS %d mA error %d\n", mA
, status
);
122 static void enable_vbus_source(struct isp1301
*isp
)
124 /* this board won't supply more than 8mA vbus power.
125 * some boards can switch a 100ma "unit load" (or more).
130 /* products will deliver OTG messages with LEDs, GUI, etc */
131 static inline void notresponding(struct isp1301
*isp
)
133 printk(KERN_NOTICE
"OTG device not responding.\n");
139 /*-------------------------------------------------------------------------*/
141 /* only two addresses possible */
142 #define ISP_BASE 0x2c
143 static unsigned short normal_i2c
[] = {
144 ISP_BASE
, ISP_BASE
+ 1,
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_REG (1 << 0)
190 # define MC1_SUSPEND_REG (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 const char *state_string(enum usb_otg_state state
)
240 case OTG_STATE_A_IDLE
: return "a_idle";
241 case OTG_STATE_A_WAIT_VRISE
: return "a_wait_vrise";
242 case OTG_STATE_A_WAIT_BCON
: return "a_wait_bcon";
243 case OTG_STATE_A_HOST
: return "a_host";
244 case OTG_STATE_A_SUSPEND
: return "a_suspend";
245 case OTG_STATE_A_PERIPHERAL
: return "a_peripheral";
246 case OTG_STATE_A_WAIT_VFALL
: return "a_wait_vfall";
247 case OTG_STATE_A_VBUS_ERR
: return "a_vbus_err";
248 case OTG_STATE_B_IDLE
: return "b_idle";
249 case OTG_STATE_B_SRP_INIT
: return "b_srp_init";
250 case OTG_STATE_B_PERIPHERAL
: return "b_peripheral";
251 case OTG_STATE_B_WAIT_ACON
: return "b_wait_acon";
252 case OTG_STATE_B_HOST
: return "b_host";
253 default: return "UNDEFINED";
257 static inline const char *state_name(struct isp1301
*isp
)
259 return state_string(isp
->otg
.state
);
263 #define dev_vdbg dev_dbg
265 #define dev_vdbg(dev, fmt, arg...) do{}while(0)
268 /*-------------------------------------------------------------------------*/
270 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
271 * not everything is guarded by board-specific checks, or even using
272 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
274 * ALSO: this currently doesn't use ISP1301 low-power modes
275 * while OTG is running.
278 static void power_down(struct isp1301
*isp
)
280 isp
->otg
.state
= OTG_STATE_UNDEFINED
;
282 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
283 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_SUSPEND_REG
);
285 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_ID_PULLDOWN
);
286 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
289 static void power_up(struct isp1301
*isp
)
291 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
292 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_SUSPEND_REG
);
294 /* do this only when cpu is driving transceiver,
295 * so host won't see a low speed device...
297 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
300 #define NO_HOST_SUSPEND
302 static int host_suspend(struct isp1301
*isp
)
304 #ifdef NO_HOST_SUSPEND
312 /* Currently ASSUMES only the OTG port matters;
313 * other ports could be active...
315 dev
= isp
->otg
.host
->controller
;
316 return dev
->driver
->suspend(dev
, 3, 0);
320 static int host_resume(struct isp1301
*isp
)
322 #ifdef NO_HOST_SUSPEND
330 dev
= isp
->otg
.host
->controller
;
331 return dev
->driver
->resume(dev
, 0);
335 static int gadget_suspend(struct isp1301
*isp
)
337 isp
->otg
.gadget
->b_hnp_enable
= 0;
338 isp
->otg
.gadget
->a_hnp_support
= 0;
339 isp
->otg
.gadget
->a_alt_hnp_support
= 0;
340 return usb_gadget_vbus_disconnect(isp
->otg
.gadget
);
343 /*-------------------------------------------------------------------------*/
345 #define TIMER_MINUTES 10
346 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
348 /* Almost all our I2C messaging comes from a work queue's task context.
349 * NOTE: guaranteeing certain response times might mean we shouldn't
350 * share keventd's work queue; a realtime task might be safest.
353 isp1301_defer_work(struct isp1301
*isp
, int work
)
357 if (isp
&& !test_and_set_bit(work
, &isp
->todo
)) {
358 (void) get_device(&isp
->client
.dev
);
359 status
= schedule_work(&isp
->work
);
360 if (!status
&& !isp
->working
)
361 dev_vdbg(&isp
->client
.dev
,
362 "work item %d may be lost\n", work
);
366 /* called from irq handlers */
367 static void a_idle(struct isp1301
*isp
, const char *tag
)
369 if (isp
->otg
.state
== OTG_STATE_A_IDLE
)
372 isp
->otg
.default_a
= 1;
374 isp
->otg
.host
->is_b_host
= 0;
377 if (isp
->otg
.gadget
) {
378 isp
->otg
.gadget
->is_a_peripheral
= 1;
381 isp
->otg
.state
= OTG_STATE_A_IDLE
;
382 isp
->last_otg_ctrl
= OTG_CTRL_REG
= OTG_CTRL_REG
& OTG_XCEIV_OUTPUTS
;
383 pr_debug(" --> %s/%s\n", state_name(isp
), tag
);
386 /* called from irq handlers */
387 static void b_idle(struct isp1301
*isp
, const char *tag
)
389 if (isp
->otg
.state
== OTG_STATE_B_IDLE
)
392 isp
->otg
.default_a
= 0;
394 isp
->otg
.host
->is_b_host
= 1;
397 if (isp
->otg
.gadget
) {
398 isp
->otg
.gadget
->is_a_peripheral
= 0;
401 isp
->otg
.state
= OTG_STATE_B_IDLE
;
402 isp
->last_otg_ctrl
= OTG_CTRL_REG
= OTG_CTRL_REG
& OTG_XCEIV_OUTPUTS
;
403 pr_debug(" --> %s/%s\n", state_name(isp
), tag
);
407 dump_regs(struct isp1301
*isp
, const char *label
)
410 u8 ctrl
= isp1301_get_u8(isp
, ISP1301_OTG_CONTROL_1
);
411 u8 status
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
412 u8 src
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
);
414 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
415 OTG_CTRL_REG
, label
, state_name(isp
),
417 /* mode control and irq enables don't change much */
421 /*-------------------------------------------------------------------------*/
423 #ifdef CONFIG_USB_OTG
426 * The OMAP OTG controller handles most of the OTG state transitions.
428 * We translate isp1301 outputs (mostly voltage comparator status) into
429 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
430 * flags into isp1301 inputs ... and infer state transitions.
435 static void check_state(struct isp1301
*isp
, const char *tag
)
437 enum usb_otg_state state
= OTG_STATE_UNDEFINED
;
438 u8 fsm
= OTG_TEST_REG
& 0x0ff;
445 state
= OTG_STATE_B_IDLE
;
451 state
= OTG_STATE_B_PERIPHERAL
;
454 state
= OTG_STATE_B_SRP_INIT
;
457 /* extra dual-role default-b states */
463 state
= OTG_STATE_B_WAIT_ACON
;
466 state
= OTG_STATE_B_HOST
;
471 state
= OTG_STATE_A_IDLE
;
474 state
= OTG_STATE_A_WAIT_VFALL
;
477 state
= OTG_STATE_A_VBUS_ERR
;
483 state
= OTG_STATE_A_PERIPHERAL
;
486 state
= OTG_STATE_A_WAIT_VRISE
;
489 state
= OTG_STATE_A_WAIT_BCON
;
492 state
= OTG_STATE_A_HOST
;
495 state
= OTG_STATE_A_SUSPEND
;
500 if (isp
->otg
.state
== state
&& !extra
)
502 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag
,
503 state_string(state
), fsm
, state_name(isp
), OTG_CTRL_REG
);
508 static inline void check_state(struct isp1301
*isp
, const char *tag
) { }
512 /* outputs from ISP1301_INTERRUPT_SOURCE */
513 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
;
529 if (int_src
& INTR_ID_GND
) { /* default-A */
530 if (isp
->otg
.state
== OTG_STATE_B_IDLE
531 || isp
->otg
.state
== OTG_STATE_UNDEFINED
) {
535 } else { /* default-B */
537 if (isp
->otg
.state
== OTG_STATE_A_IDLE
538 || isp
->otg
.state
== OTG_STATE_UNDEFINED
) {
543 OTG_CTRL_REG
= otg_ctrl
;
546 /* outputs from ISP1301_OTG_STATUS */
547 static void update_otg2(struct isp1301
*isp
, u8 otg_status
)
551 otg_ctrl
= OTG_CTRL_REG
554 & ~(OTG_BSESSVLD
|OTG_BSESSEND
);
555 if (otg_status
& OTG_B_SESS_VLD
)
556 otg_ctrl
|= OTG_BSESSVLD
;
557 else if (otg_status
& OTG_B_SESS_END
)
558 otg_ctrl
|= OTG_BSESSEND
;
559 OTG_CTRL_REG
= otg_ctrl
;
562 /* inputs going to ISP1301 */
563 static void otg_update_isp(struct isp1301
*isp
)
565 u32 otg_ctrl
, otg_change
;
566 u8 set
= OTG1_DM_PULLDOWN
, clr
= OTG1_DM_PULLUP
;
568 otg_ctrl
= OTG_CTRL_REG
;
569 otg_change
= otg_ctrl
^ isp
->last_otg_ctrl
;
570 isp
->last_otg_ctrl
= otg_ctrl
;
571 otg_ctrl
= otg_ctrl
& OTG_XCEIV_INPUTS
;
573 switch (isp
->otg
.state
) {
574 case OTG_STATE_B_IDLE
:
575 case OTG_STATE_B_PERIPHERAL
:
576 case OTG_STATE_B_SRP_INIT
:
577 if (!(otg_ctrl
& OTG_PULLUP
)) {
578 // if (otg_ctrl & OTG_B_HNPEN) {
579 if (isp
->otg
.gadget
->b_hnp_enable
) {
580 isp
->otg
.state
= OTG_STATE_B_WAIT_ACON
;
581 pr_debug(" --> b_wait_acon\n");
586 set
|= OTG1_DP_PULLUP
;
587 clr
|= OTG1_DP_PULLDOWN
;
589 case OTG_STATE_A_SUSPEND
:
590 case OTG_STATE_A_PERIPHERAL
:
591 if (otg_ctrl
& OTG_PULLUP
)
594 // case OTG_STATE_B_WAIT_ACON:
597 set
|= OTG1_DP_PULLDOWN
;
598 clr
|= OTG1_DP_PULLUP
;
602 # define toggle(OTG,ISP) do { \
603 if (otg_ctrl & OTG) set |= ISP; \
607 if (!(isp
->otg
.host
))
608 otg_ctrl
&= ~OTG_DRV_VBUS
;
610 switch (isp
->otg
.state
) {
611 case OTG_STATE_A_SUSPEND
:
612 if (otg_ctrl
& OTG_DRV_VBUS
) {
613 set
|= OTG1_VBUS_DRV
;
616 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
620 case OTG_STATE_A_VBUS_ERR
:
621 isp
->otg
.state
= OTG_STATE_A_WAIT_VFALL
;
622 pr_debug(" --> a_wait_vfall\n");
624 case OTG_STATE_A_WAIT_VFALL
:
625 /* FIXME usbcore thinks port power is still on ... */
626 clr
|= OTG1_VBUS_DRV
;
628 case OTG_STATE_A_IDLE
:
629 if (otg_ctrl
& OTG_DRV_VBUS
) {
630 isp
->otg
.state
= OTG_STATE_A_WAIT_VRISE
;
631 pr_debug(" --> a_wait_vrise\n");
635 toggle(OTG_DRV_VBUS
, OTG1_VBUS_DRV
);
638 toggle(OTG_PU_VBUS
, OTG1_VBUS_CHRG
);
639 toggle(OTG_PD_VBUS
, OTG1_VBUS_DISCHRG
);
643 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, set
);
644 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, clr
);
646 /* HNP switch to host or peripheral; and SRP */
647 if (otg_change
& OTG_PULLUP
) {
648 switch (isp
->otg
.state
) {
649 case OTG_STATE_B_IDLE
:
650 if (clr
& OTG1_DP_PULLUP
)
652 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
653 pr_debug(" --> b_peripheral\n");
655 case OTG_STATE_A_SUSPEND
:
656 if (clr
& OTG1_DP_PULLUP
)
658 isp
->otg
.state
= OTG_STATE_A_PERIPHERAL
;
659 pr_debug(" --> a_peripheral\n");
664 OTG_CTRL_REG
|= OTG_PULLUP
;
667 check_state(isp
, __FUNCTION__
);
668 dump_regs(isp
, "otg->isp1301");
671 static irqreturn_t
omap_otg_irq(int irq
, void *_isp
)
673 u16 otg_irq
= OTG_IRQ_SRC_REG
;
676 struct isp1301
*isp
= _isp
;
678 /* update ISP1301 transciever from OTG controller */
679 if (otg_irq
& OPRT_CHG
) {
680 OTG_IRQ_SRC_REG
= OPRT_CHG
;
681 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
684 /* SRP to become b_peripheral failed */
685 } else if (otg_irq
& B_SRP_TMROUT
) {
686 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG
);
689 /* gadget drivers that care should monitor all kinds of
690 * remote wakeup (SRP, normal) using their own timer
691 * to give "check cable and A-device" messages.
693 if (isp
->otg
.state
== OTG_STATE_B_SRP_INIT
)
694 b_idle(isp
, "srp_timeout");
696 OTG_IRQ_SRC_REG
= B_SRP_TMROUT
;
699 /* HNP to become b_host failed */
700 } else if (otg_irq
& B_HNP_FAIL
) {
701 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
702 state_name(isp
), OTG_CTRL_REG
);
705 otg_ctrl
= OTG_CTRL_REG
;
706 otg_ctrl
|= OTG_BUSDROP
;
707 otg_ctrl
&= OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
708 OTG_CTRL_REG
= otg_ctrl
;
710 /* subset of b_peripheral()... */
711 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
712 pr_debug(" --> b_peripheral\n");
714 OTG_IRQ_SRC_REG
= B_HNP_FAIL
;
717 /* detect SRP from B-device ... */
718 } else if (otg_irq
& A_SRP_DETECT
) {
719 pr_debug("otg: %s SRP_DETECT, %06x\n",
720 state_name(isp
), OTG_CTRL_REG
);
722 isp1301_defer_work(isp
, WORK_UPDATE_OTG
);
723 switch (isp
->otg
.state
) {
724 case OTG_STATE_A_IDLE
:
727 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
728 otg_ctrl
= OTG_CTRL_REG
;
729 otg_ctrl
|= OTG_A_BUSREQ
;
730 otg_ctrl
&= ~(OTG_BUSDROP
|OTG_B_BUSREQ
)
733 OTG_CTRL_REG
= otg_ctrl
;
739 OTG_IRQ_SRC_REG
= A_SRP_DETECT
;
742 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
743 * we don't track them separately
745 } else if (otg_irq
& A_REQ_TMROUT
) {
746 otg_ctrl
= OTG_CTRL_REG
;
747 pr_info("otg: BCON_TMOUT from %s, %06x\n",
748 state_name(isp
), otg_ctrl
);
751 otg_ctrl
|= OTG_BUSDROP
;
752 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
753 OTG_CTRL_REG
= otg_ctrl
;
754 isp
->otg
.state
= OTG_STATE_A_WAIT_VFALL
;
756 OTG_IRQ_SRC_REG
= A_REQ_TMROUT
;
759 /* A-supplied voltage fell too low; overcurrent */
760 } else if (otg_irq
& A_VBUS_ERR
) {
761 otg_ctrl
= OTG_CTRL_REG
;
762 printk(KERN_ERR
"otg: %s, VBUS_ERR %04x ctrl %06x\n",
763 state_name(isp
), otg_irq
, otg_ctrl
);
765 otg_ctrl
|= OTG_BUSDROP
;
766 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
767 OTG_CTRL_REG
= otg_ctrl
;
768 isp
->otg
.state
= OTG_STATE_A_VBUS_ERR
;
770 OTG_IRQ_SRC_REG
= A_VBUS_ERR
;
773 /* switch driver; the transciever code activates it,
774 * ungating the udc clock or resuming OHCI.
776 } else if (otg_irq
& DRIVER_SWITCH
) {
779 otg_ctrl
= OTG_CTRL_REG
;
780 printk(KERN_NOTICE
"otg: %s, SWITCH to %s, ctrl %06x\n",
782 (otg_ctrl
& OTG_DRIVER_SEL
)
785 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
787 /* role is peripheral */
788 if (otg_ctrl
& OTG_DRIVER_SEL
) {
789 switch (isp
->otg
.state
) {
790 case OTG_STATE_A_IDLE
:
791 b_idle(isp
, __FUNCTION__
);
796 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
800 if (!(otg_ctrl
& OTG_ID
)) {
801 otg_ctrl
&= OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
802 OTG_CTRL_REG
= otg_ctrl
| OTG_A_BUSREQ
;
806 switch (isp
->otg
.state
) {
807 case OTG_STATE_B_WAIT_ACON
:
808 isp
->otg
.state
= OTG_STATE_B_HOST
;
809 pr_debug(" --> b_host\n");
812 case OTG_STATE_A_WAIT_BCON
:
813 isp
->otg
.state
= OTG_STATE_A_HOST
;
814 pr_debug(" --> a_host\n");
816 case OTG_STATE_A_PERIPHERAL
:
817 isp
->otg
.state
= OTG_STATE_A_WAIT_BCON
;
818 pr_debug(" --> a_wait_bcon\n");
823 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
827 OTG_IRQ_SRC_REG
= DRIVER_SWITCH
;
831 usb_bus_start_enum(isp
->otg
.host
,
832 isp
->otg
.host
->otg_port
);
835 check_state(isp
, __FUNCTION__
);
839 static struct platform_device
*otg_dev
;
841 static int otg_init(struct isp1301
*isp
)
846 dump_regs(isp
, __FUNCTION__
);
847 /* some of these values are board-specific... */
848 OTG_SYSCON_2_REG
|= OTG_EN
850 | SRP_GPDATA
/* 9msec Bdev D+ pulse */
851 | SRP_GPDVBUS
/* discharge after VBUS pulse */
852 // | (3 << 24) /* 2msec VBUS pulse */
854 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
855 | SRP_DPW
/* detect 167+ns SRP pulses */
856 | SRP_DATA
| SRP_VBUS
/* accept both kinds of SRP pulse */
859 update_otg1(isp
, isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
));
860 update_otg2(isp
, isp1301_get_u8(isp
, ISP1301_OTG_STATUS
));
862 check_state(isp
, __FUNCTION__
);
863 pr_debug("otg: %s, %s %06x\n",
864 state_name(isp
), __FUNCTION__
, OTG_CTRL_REG
);
866 OTG_IRQ_EN_REG
= DRIVER_SWITCH
| OPRT_CHG
867 | B_SRP_TMROUT
| B_HNP_FAIL
868 | A_VBUS_ERR
| A_SRP_DETECT
| A_REQ_TMROUT
;
869 OTG_SYSCON_2_REG
|= OTG_EN
;
874 static int otg_probe(struct platform_device
*dev
)
876 // struct omap_usb_config *config = dev->platform_data;
882 static int otg_remove(struct platform_device
*dev
)
888 struct platform_driver omap_otg_driver
= {
890 .remove
= otg_remove
,
892 .owner
= THIS_MODULE
,
897 static int otg_bind(struct isp1301
*isp
)
904 status
= platform_driver_register(&omap_otg_driver
);
909 status
= request_irq(otg_dev
->resource
[1].start
, omap_otg_irq
,
910 IRQF_DISABLED
, DRIVER_NAME
, isp
);
915 platform_driver_unregister(&omap_otg_driver
);
919 static void otg_unbind(struct isp1301
*isp
)
923 free_irq(otg_dev
->resource
[1].start
, isp
);
928 /* OTG controller isn't clocked */
930 #endif /* CONFIG_USB_OTG */
932 /*-------------------------------------------------------------------------*/
934 static void b_peripheral(struct isp1301
*isp
)
936 OTG_CTRL_REG
= OTG_CTRL_REG
& OTG_XCEIV_OUTPUTS
;
937 usb_gadget_vbus_connect(isp
->otg
.gadget
);
939 #ifdef CONFIG_USB_OTG
940 enable_vbus_draw(isp
, 8);
943 enable_vbus_draw(isp
, 100);
944 /* UDC driver just set OTG_BSESSVLD */
945 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_DP_PULLUP
);
946 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_DP_PULLDOWN
);
947 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
948 pr_debug(" --> b_peripheral\n");
949 dump_regs(isp
, "2periph");
953 static void isp_update_otg(struct isp1301
*isp
, u8 stat
)
955 u8 isp_stat
, isp_bstat
;
956 enum usb_otg_state state
= isp
->otg
.state
;
958 if (stat
& INTR_BDIS_ACON
)
959 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp
));
961 /* start certain state transitions right away */
962 isp_stat
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
);
963 if (isp_stat
& INTR_ID_GND
) {
964 if (isp
->otg
.default_a
) {
966 case OTG_STATE_B_IDLE
:
969 case OTG_STATE_A_IDLE
:
970 enable_vbus_source(isp
);
972 case OTG_STATE_A_WAIT_VRISE
:
973 /* we skip over OTG_STATE_A_WAIT_BCON, since
974 * the HC will transition to A_HOST (or
975 * A_SUSPEND!) without our noticing except
978 if (isp_stat
& INTR_VBUS_VLD
)
979 isp
->otg
.state
= OTG_STATE_A_HOST
;
981 case OTG_STATE_A_WAIT_VFALL
:
982 if (!(isp_stat
& INTR_SESS_VLD
))
983 a_idle(isp
, "vfell");
986 if (!(isp_stat
& INTR_VBUS_VLD
))
987 isp
->otg
.state
= OTG_STATE_A_VBUS_ERR
;
990 isp_bstat
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
993 case OTG_STATE_B_PERIPHERAL
:
994 case OTG_STATE_B_HOST
:
995 case OTG_STATE_B_WAIT_ACON
:
996 usb_gadget_vbus_disconnect(isp
->otg
.gadget
);
1001 if (state
!= OTG_STATE_A_IDLE
)
1003 if (isp
->otg
.host
&& state
== OTG_STATE_A_IDLE
)
1004 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
1008 /* if user unplugged mini-A end of cable,
1009 * don't bypass A_WAIT_VFALL.
1011 if (isp
->otg
.default_a
) {
1014 isp
->otg
.state
= OTG_STATE_A_WAIT_VFALL
;
1016 case OTG_STATE_A_WAIT_VFALL
:
1017 state
= OTG_STATE_A_IDLE
;
1018 /* khubd may take a while to notice and
1019 * handle this disconnect, so don't go
1020 * to B_IDLE quite yet.
1023 case OTG_STATE_A_IDLE
:
1025 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
,
1027 isp
->otg
.state
= OTG_STATE_B_IDLE
;
1028 OTG_CTRL_REG
&= OTG_CTRL_REG
& OTG_CTRL_MASK
1031 case OTG_STATE_B_IDLE
:
1035 isp_bstat
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
1037 switch (isp
->otg
.state
) {
1038 case OTG_STATE_B_PERIPHERAL
:
1039 case OTG_STATE_B_WAIT_ACON
:
1040 case OTG_STATE_B_HOST
:
1041 if (likely(isp_bstat
& OTG_B_SESS_VLD
))
1043 enable_vbus_draw(isp
, 0);
1044 #ifndef CONFIG_USB_OTG
1045 /* UDC driver will clear OTG_BSESSVLD */
1046 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
,
1048 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
,
1050 dump_regs(isp
, __FUNCTION__
);
1053 case OTG_STATE_B_SRP_INIT
:
1054 b_idle(isp
, __FUNCTION__
);
1055 OTG_CTRL_REG
&= OTG_CTRL_REG
& OTG_XCEIV_OUTPUTS
;
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 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
, __FUNCTION__
);
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
= OTG_CTRL_REG
;
1140 otg_ctrl
|= OTG_A_BUSREQ
;
1141 otg_ctrl
&= ~(OTG_BUSDROP
|OTG_B_BUSREQ
)
1143 OTG_CTRL_REG
= 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
= container_of(dev
, struct isp1301
, client
.dev
);
1202 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1203 if (isp
->i2c_release
)
1204 isp
->i2c_release(dev
);
1208 static struct isp1301
*the_transceiver
;
1210 static int isp1301_detach_client(struct i2c_client
*i2c
)
1212 struct isp1301
*isp
;
1214 isp
= container_of(i2c
, struct isp1301
, client
);
1216 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_FALLING
, ~0);
1217 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_RISING
, ~0);
1218 free_irq(isp
->irq
, isp
);
1219 #ifdef CONFIG_USB_OTG
1222 if (machine_is_omap_h2())
1225 isp
->timer
.data
= 0;
1226 set_bit(WORK_STOP
, &isp
->todo
);
1227 del_timer_sync(&isp
->timer
);
1228 flush_scheduled_work();
1230 put_device(&i2c
->dev
);
1231 the_transceiver
= 0;
1233 return i2c_detach_client(i2c
);
1236 /*-------------------------------------------------------------------------*/
1238 /* NOTE: three modes are possible here, only one of which
1239 * will be standards-conformant on any given system:
1241 * - OTG mode (dual-role), required if there's a Mini-AB connector
1242 * - HOST mode, for when there's one or more A (host) connectors
1243 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1245 * As a rule, you won't have an isp1301 chip unless it's there to
1246 * support the OTG mode. Other modes help testing USB controllers
1247 * in isolation from (full) OTG support, or maybe so later board
1248 * revisions can help to support those feature.
1251 #ifdef CONFIG_USB_OTG
1253 static int isp1301_otg_enable(struct isp1301
*isp
)
1258 /* NOTE: since we don't change this, this provides
1259 * a few more interrupts than are strictly needed.
1261 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1262 INTR_VBUS_VLD
| INTR_SESS_VLD
| INTR_ID_GND
);
1263 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1264 INTR_VBUS_VLD
| INTR_SESS_VLD
| INTR_ID_GND
);
1266 dev_info(&isp
->client
.dev
, "ready for dual-role USB ...\n");
1273 /* add or disable the host device+driver */
1275 isp1301_set_host(struct otg_transceiver
*otg
, struct usb_bus
*host
)
1277 struct isp1301
*isp
= container_of(otg
, struct isp1301
, otg
);
1279 if (!otg
|| isp
!= the_transceiver
)
1289 #ifdef CONFIG_USB_OTG
1290 isp
->otg
.host
= host
;
1291 dev_dbg(&isp
->client
.dev
, "registered host\n");
1293 if (isp
->otg
.gadget
)
1294 return isp1301_otg_enable(isp
);
1297 #elif !defined(CONFIG_USB_GADGET_OMAP)
1298 // FIXME update its refcount
1299 isp
->otg
.host
= host
;
1303 if (machine_is_omap_h2())
1304 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
1306 dev_info(&isp
->client
.dev
, "A-Host sessions ok\n");
1307 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1309 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1312 /* If this has a Mini-AB connector, this mode is highly
1313 * nonstandard ... but can be handy for testing, especially with
1314 * the Mini-A end of an OTG cable. (Or something nonstandard
1315 * like MiniB-to-StandardB, maybe built with a gender mender.)
1317 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_VBUS_DRV
);
1319 dump_regs(isp
, __FUNCTION__
);
1324 dev_dbg(&isp
->client
.dev
, "host sessions not allowed\n");
1331 isp1301_set_peripheral(struct otg_transceiver
*otg
, struct usb_gadget
*gadget
)
1333 struct isp1301
*isp
= container_of(otg
, struct isp1301
, otg
);
1335 if (!otg
|| isp
!= the_transceiver
)
1340 if (!isp
->otg
.default_a
)
1341 enable_vbus_draw(isp
, 0);
1342 usb_gadget_vbus_disconnect(isp
->otg
.gadget
);
1343 isp
->otg
.gadget
= 0;
1348 #ifdef CONFIG_USB_OTG
1349 isp
->otg
.gadget
= gadget
;
1350 dev_dbg(&isp
->client
.dev
, "registered gadget\n");
1351 /* gadget driver may be suspended until vbus_connect () */
1353 return isp1301_otg_enable(isp
);
1356 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1357 isp
->otg
.gadget
= gadget
;
1358 // FIXME update its refcount
1360 OTG_CTRL_REG
= (OTG_CTRL_REG
& OTG_CTRL_MASK
1361 & ~(OTG_XCEIV_OUTPUTS
|OTG_CTRL_BITS
))
1364 isp
->otg
.state
= OTG_STATE_B_IDLE
;
1366 if (machine_is_omap_h2())
1367 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
1369 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1371 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
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_HOST
:
1450 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
1451 /* caller will suspend next */
1453 case OTG_STATE_A_HOST
:
1455 /* autoconnect mode avoids irq latency bugs */
1456 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
,
1459 /* caller must suspend then clear A_BUSREQ */
1460 usb_gadget_vbus_connect(isp
->otg
.gadget
);
1461 OTG_CTRL_REG
|= OTG_A_SETB_HNPEN
;
1464 case OTG_STATE_A_PERIPHERAL
:
1465 /* initiated by B-Host suspend */
1470 pr_debug("otg: HNP %s, %06x ...\n",
1471 state_name(isp
), OTG_CTRL_REG
);
1472 check_state(isp
, __FUNCTION__
);
1480 /*-------------------------------------------------------------------------*/
1482 /* no error returns, they'd just make bus scanning stop */
1483 static int isp1301_probe(struct i2c_adapter
*bus
, int address
, int kind
)
1486 struct isp1301
*isp
;
1487 struct i2c_client
*i2c
;
1489 if (the_transceiver
)
1492 isp
= kzalloc(sizeof *isp
, GFP_KERNEL
);
1496 INIT_WORK(&isp
->work
, isp1301_work
);
1497 init_timer(&isp
->timer
);
1498 isp
->timer
.function
= isp1301_timer
;
1499 isp
->timer
.data
= (unsigned long) isp
;
1502 isp
->client
.addr
= address
;
1503 i2c_set_clientdata(&isp
->client
, isp
);
1504 isp
->client
.adapter
= bus
;
1505 isp
->client
.driver
= &isp1301_driver
;
1506 strlcpy(isp
->client
.name
, DRIVER_NAME
, I2C_NAME_SIZE
);
1509 /* if this is a true probe, verify the chip ... */
1511 status
= isp1301_get_u16(isp
, ISP1301_VENDOR_ID
);
1512 if (status
!= I2C_VENDOR_ID_PHILIPS
) {
1513 dev_dbg(&bus
->dev
, "addr %d not philips id: %d\n",
1517 status
= isp1301_get_u16(isp
, ISP1301_PRODUCT_ID
);
1518 if (status
!= I2C_PRODUCT_ID_PHILIPS_1301
) {
1519 dev_dbg(&bus
->dev
, "%d not isp1301, %d\n",
1525 status
= i2c_attach_client(i2c
);
1527 dev_dbg(&bus
->dev
, "can't attach %s to device %d, err %d\n",
1528 DRIVER_NAME
, address
, status
);
1533 isp
->i2c_release
= i2c
->dev
.release
;
1534 i2c
->dev
.release
= isp1301_release
;
1536 /* initial development used chiprev 2.00 */
1537 status
= i2c_smbus_read_word_data(i2c
, ISP1301_BCD_DEVICE
);
1538 dev_info(&i2c
->dev
, "chiprev %x.%02x, driver " DRIVER_VERSION
"\n",
1539 status
>> 8, status
& 0xff);
1541 /* make like power-on reset */
1542 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_MASK
);
1544 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_2
, MC2_BI_DI
);
1545 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_2
, ~MC2_BI_DI
);
1547 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
,
1548 OTG1_DM_PULLDOWN
| OTG1_DP_PULLDOWN
);
1549 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
,
1550 ~(OTG1_DM_PULLDOWN
| OTG1_DP_PULLDOWN
));
1552 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_LATCH
, ~0);
1553 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_FALLING
, ~0);
1554 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_RISING
, ~0);
1556 #ifdef CONFIG_USB_OTG
1557 status
= otg_bind(isp
);
1559 dev_dbg(&i2c
->dev
, "can't bind OTG\n");
1564 if (machine_is_omap_h2()) {
1565 /* full speed signaling by default */
1566 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
,
1568 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_2
,
1571 /* IRQ wired at M14 */
1572 omap_cfg_reg(M14_1510_GPIO2
);
1573 isp
->irq
= OMAP_GPIO_IRQ(2);
1574 if (gpio_request(2, "isp1301") == 0)
1575 gpio_direction_input(2);
1576 isp
->irq_type
= IRQF_TRIGGER_FALLING
;
1579 isp
->irq_type
|= IRQF_SAMPLE_RANDOM
;
1580 status
= request_irq(isp
->irq
, isp1301_irq
,
1581 isp
->irq_type
, DRIVER_NAME
, isp
);
1583 dev_dbg(&i2c
->dev
, "can't get IRQ %d, err %d\n",
1585 #ifdef CONFIG_USB_OTG
1588 i2c_detach_client(i2c
);
1592 isp
->otg
.dev
= &isp
->client
.dev
;
1593 isp
->otg
.label
= DRIVER_NAME
;
1595 isp
->otg
.set_host
= isp1301_set_host
,
1596 isp
->otg
.set_peripheral
= isp1301_set_peripheral
,
1597 isp
->otg
.set_power
= isp1301_set_power
,
1598 isp
->otg
.start_srp
= isp1301_start_srp
,
1599 isp
->otg
.start_hnp
= isp1301_start_hnp
,
1601 enable_vbus_draw(isp
, 0);
1603 the_transceiver
= isp
;
1605 #ifdef CONFIG_USB_OTG
1606 update_otg1(isp
, isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
));
1607 update_otg2(isp
, isp1301_get_u8(isp
, ISP1301_OTG_STATUS
));
1610 dump_regs(isp
, __FUNCTION__
);
1613 mod_timer(&isp
->timer
, jiffies
+ TIMER_JIFFIES
);
1614 dev_dbg(&i2c
->dev
, "scheduled timer, %d min\n", TIMER_MINUTES
);
1617 status
= otg_set_transceiver(&isp
->otg
);
1619 dev_err(&i2c
->dev
, "can't register transceiver, %d\n",
1625 static int isp1301_scan_bus(struct i2c_adapter
*bus
)
1627 if (!i2c_check_functionality(bus
, I2C_FUNC_SMBUS_BYTE_DATA
1628 | I2C_FUNC_SMBUS_READ_WORD_DATA
))
1630 return i2c_probe(bus
, &addr_data
, isp1301_probe
);
1633 static struct i2c_driver isp1301_driver
= {
1635 .name
= "isp1301_omap",
1637 .attach_adapter
= isp1301_scan_bus
,
1638 .detach_client
= isp1301_detach_client
,
1641 /*-------------------------------------------------------------------------*/
1643 static int __init
isp_init(void)
1645 return i2c_add_driver(&isp1301_driver
);
1647 module_init(isp_init
);
1649 static void __exit
isp_exit(void)
1651 if (the_transceiver
)
1652 otg_set_transceiver(0);
1653 i2c_del_driver(&isp1301_driver
);
1655 module_exit(isp_exit
);