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>
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 */
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 */
98 #include <asm/mach-types.h>
101 #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
103 #include <linux/i2c/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 (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 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
);
262 /*-------------------------------------------------------------------------*/
264 /* NOTE: some of this ISP1301 setup is specific to H2 boards;
265 * not everything is guarded by board-specific checks, or even using
266 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
268 * ALSO: this currently doesn't use ISP1301 low-power modes
269 * while OTG is running.
272 static void power_down(struct isp1301
*isp
)
274 isp
->otg
.state
= OTG_STATE_UNDEFINED
;
276 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
277 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_SUSPEND
);
279 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_ID_PULLDOWN
);
280 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
283 static void power_up(struct isp1301
*isp
)
285 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
286 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_SUSPEND
);
288 /* do this only when cpu is driving transceiver,
289 * so host won't see a low speed device...
291 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
294 #define NO_HOST_SUSPEND
296 static int host_suspend(struct isp1301
*isp
)
298 #ifdef NO_HOST_SUSPEND
306 /* Currently ASSUMES only the OTG port matters;
307 * other ports could be active...
309 dev
= isp
->otg
.host
->controller
;
310 return dev
->driver
->suspend(dev
, 3, 0);
314 static int host_resume(struct isp1301
*isp
)
316 #ifdef NO_HOST_SUSPEND
324 dev
= isp
->otg
.host
->controller
;
325 return dev
->driver
->resume(dev
, 0);
329 static int gadget_suspend(struct isp1301
*isp
)
331 isp
->otg
.gadget
->b_hnp_enable
= 0;
332 isp
->otg
.gadget
->a_hnp_support
= 0;
333 isp
->otg
.gadget
->a_alt_hnp_support
= 0;
334 return usb_gadget_vbus_disconnect(isp
->otg
.gadget
);
337 /*-------------------------------------------------------------------------*/
339 #define TIMER_MINUTES 10
340 #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
342 /* Almost all our I2C messaging comes from a work queue's task context.
343 * NOTE: guaranteeing certain response times might mean we shouldn't
344 * share keventd's work queue; a realtime task might be safest.
347 isp1301_defer_work(struct isp1301
*isp
, int work
)
351 if (isp
&& !test_and_set_bit(work
, &isp
->todo
)) {
352 (void) get_device(&isp
->client
.dev
);
353 status
= schedule_work(&isp
->work
);
354 if (!status
&& !isp
->working
)
355 dev_vdbg(&isp
->client
.dev
,
356 "work item %d may be lost\n", work
);
360 /* called from irq handlers */
361 static void a_idle(struct isp1301
*isp
, const char *tag
)
365 if (isp
->otg
.state
== OTG_STATE_A_IDLE
)
368 isp
->otg
.default_a
= 1;
370 isp
->otg
.host
->is_b_host
= 0;
373 if (isp
->otg
.gadget
) {
374 isp
->otg
.gadget
->is_a_peripheral
= 1;
377 isp
->otg
.state
= OTG_STATE_A_IDLE
;
378 l
= omap_readl(OTG_CTRL
) & OTG_XCEIV_OUTPUTS
;
379 omap_writel(l
, OTG_CTRL
);
380 isp
->last_otg_ctrl
= l
;
381 pr_debug(" --> %s/%s\n", state_name(isp
), tag
);
384 /* called from irq handlers */
385 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 l
= omap_readl(OTG_CTRL
) & OTG_XCEIV_OUTPUTS
;
403 omap_writel(l
, OTG_CTRL
);
404 isp
->last_otg_ctrl
= l
;
405 pr_debug(" --> %s/%s\n", state_name(isp
), tag
);
409 dump_regs(struct isp1301
*isp
, const char *label
)
412 u8 ctrl
= isp1301_get_u8(isp
, ISP1301_OTG_CONTROL_1
);
413 u8 status
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
414 u8 src
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
);
416 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
417 omap_readl(OTG_CTRL
), label
, state_name(isp
),
419 /* mode control and irq enables don't change much */
423 /*-------------------------------------------------------------------------*/
425 #ifdef CONFIG_USB_OTG
428 * The OMAP OTG controller handles most of the OTG state transitions.
430 * We translate isp1301 outputs (mostly voltage comparator status) into
431 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
432 * flags into isp1301 inputs ... and infer state transitions.
437 static void check_state(struct isp1301
*isp
, const char *tag
)
439 enum usb_otg_state state
= OTG_STATE_UNDEFINED
;
440 u8 fsm
= omap_readw(OTG_TEST
) & 0x0ff;
447 state
= OTG_STATE_B_IDLE
;
453 state
= OTG_STATE_B_PERIPHERAL
;
456 state
= OTG_STATE_B_SRP_INIT
;
459 /* extra dual-role default-b states */
465 state
= OTG_STATE_B_WAIT_ACON
;
468 state
= OTG_STATE_B_HOST
;
473 state
= OTG_STATE_A_IDLE
;
476 state
= OTG_STATE_A_WAIT_VFALL
;
479 state
= OTG_STATE_A_VBUS_ERR
;
485 state
= OTG_STATE_A_PERIPHERAL
;
488 state
= OTG_STATE_A_WAIT_VRISE
;
491 state
= OTG_STATE_A_WAIT_BCON
;
494 state
= OTG_STATE_A_HOST
;
497 state
= OTG_STATE_A_SUSPEND
;
502 if (isp
->otg
.state
== state
&& !extra
)
504 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag
,
505 state_string(state
), fsm
, state_name(isp
),
506 omap_readl(OTG_CTRL
));
511 static inline void check_state(struct isp1301
*isp
, const char *tag
) { }
515 /* outputs from ISP1301_INTERRUPT_SOURCE */
516 static void update_otg1(struct isp1301
*isp
, u8 int_src
)
520 otg_ctrl
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
521 otg_ctrl
&= ~OTG_XCEIV_INPUTS
;
522 otg_ctrl
&= ~(OTG_ID
|OTG_ASESSVLD
|OTG_VBUSVLD
);
525 if (int_src
& INTR_SESS_VLD
)
526 otg_ctrl
|= OTG_ASESSVLD
;
527 else if (isp
->otg
.state
== OTG_STATE_A_WAIT_VFALL
) {
528 a_idle(isp
, "vfall");
529 otg_ctrl
&= ~OTG_CTRL_BITS
;
531 if (int_src
& INTR_VBUS_VLD
)
532 otg_ctrl
|= OTG_VBUSVLD
;
533 if (int_src
& INTR_ID_GND
) { /* default-A */
534 if (isp
->otg
.state
== OTG_STATE_B_IDLE
535 || isp
->otg
.state
== OTG_STATE_UNDEFINED
) {
539 } else { /* default-B */
541 if (isp
->otg
.state
== OTG_STATE_A_IDLE
542 || isp
->otg
.state
== OTG_STATE_UNDEFINED
) {
547 omap_writel(otg_ctrl
, OTG_CTRL
);
550 /* outputs from ISP1301_OTG_STATUS */
551 static void update_otg2(struct isp1301
*isp
, u8 otg_status
)
555 otg_ctrl
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
556 otg_ctrl
&= ~OTG_XCEIV_INPUTS
;
557 otg_ctrl
&= ~(OTG_BSESSVLD
| OTG_BSESSEND
);
558 if (otg_status
& OTG_B_SESS_VLD
)
559 otg_ctrl
|= OTG_BSESSVLD
;
560 else if (otg_status
& OTG_B_SESS_END
)
561 otg_ctrl
|= OTG_BSESSEND
;
562 omap_writel(otg_ctrl
, OTG_CTRL
);
565 /* inputs going to ISP1301 */
566 static void otg_update_isp(struct isp1301
*isp
)
568 u32 otg_ctrl
, otg_change
;
569 u8 set
= OTG1_DM_PULLDOWN
, clr
= OTG1_DM_PULLUP
;
571 otg_ctrl
= omap_readl(OTG_CTRL
);
572 otg_change
= otg_ctrl
^ isp
->last_otg_ctrl
;
573 isp
->last_otg_ctrl
= otg_ctrl
;
574 otg_ctrl
= otg_ctrl
& OTG_XCEIV_INPUTS
;
576 switch (isp
->otg
.state
) {
577 case OTG_STATE_B_IDLE
:
578 case OTG_STATE_B_PERIPHERAL
:
579 case OTG_STATE_B_SRP_INIT
:
580 if (!(otg_ctrl
& OTG_PULLUP
)) {
581 // if (otg_ctrl & OTG_B_HNPEN) {
582 if (isp
->otg
.gadget
->b_hnp_enable
) {
583 isp
->otg
.state
= OTG_STATE_B_WAIT_ACON
;
584 pr_debug(" --> b_wait_acon\n");
589 set
|= OTG1_DP_PULLUP
;
590 clr
|= OTG1_DP_PULLDOWN
;
592 case OTG_STATE_A_SUSPEND
:
593 case OTG_STATE_A_PERIPHERAL
:
594 if (otg_ctrl
& OTG_PULLUP
)
597 // case OTG_STATE_B_WAIT_ACON:
600 set
|= OTG1_DP_PULLDOWN
;
601 clr
|= OTG1_DP_PULLUP
;
605 # define toggle(OTG,ISP) do { \
606 if (otg_ctrl & OTG) set |= ISP; \
610 if (!(isp
->otg
.host
))
611 otg_ctrl
&= ~OTG_DRV_VBUS
;
613 switch (isp
->otg
.state
) {
614 case OTG_STATE_A_SUSPEND
:
615 if (otg_ctrl
& OTG_DRV_VBUS
) {
616 set
|= OTG1_VBUS_DRV
;
619 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
623 case OTG_STATE_A_VBUS_ERR
:
624 isp
->otg
.state
= OTG_STATE_A_WAIT_VFALL
;
625 pr_debug(" --> a_wait_vfall\n");
627 case OTG_STATE_A_WAIT_VFALL
:
628 /* FIXME usbcore thinks port power is still on ... */
629 clr
|= OTG1_VBUS_DRV
;
631 case OTG_STATE_A_IDLE
:
632 if (otg_ctrl
& OTG_DRV_VBUS
) {
633 isp
->otg
.state
= OTG_STATE_A_WAIT_VRISE
;
634 pr_debug(" --> a_wait_vrise\n");
638 toggle(OTG_DRV_VBUS
, OTG1_VBUS_DRV
);
641 toggle(OTG_PU_VBUS
, OTG1_VBUS_CHRG
);
642 toggle(OTG_PD_VBUS
, OTG1_VBUS_DISCHRG
);
646 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, set
);
647 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, clr
);
649 /* HNP switch to host or peripheral; and SRP */
650 if (otg_change
& OTG_PULLUP
) {
653 switch (isp
->otg
.state
) {
654 case OTG_STATE_B_IDLE
:
655 if (clr
& OTG1_DP_PULLUP
)
657 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
658 pr_debug(" --> b_peripheral\n");
660 case OTG_STATE_A_SUSPEND
:
661 if (clr
& OTG1_DP_PULLUP
)
663 isp
->otg
.state
= OTG_STATE_A_PERIPHERAL
;
664 pr_debug(" --> a_peripheral\n");
669 l
= omap_readl(OTG_CTRL
);
671 omap_writel(l
, OTG_CTRL
);
674 check_state(isp
, __func__
);
675 dump_regs(isp
, "otg->isp1301");
678 static irqreturn_t
omap_otg_irq(int irq
, void *_isp
)
680 u16 otg_irq
= omap_readw(OTG_IRQ_SRC
);
683 struct isp1301
*isp
= _isp
;
685 /* update ISP1301 transciever from OTG controller */
686 if (otg_irq
& OPRT_CHG
) {
687 omap_writew(OPRT_CHG
, OTG_IRQ_SRC
);
688 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
691 /* SRP to become b_peripheral failed */
692 } else if (otg_irq
& B_SRP_TMROUT
) {
693 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL
));
696 /* gadget drivers that care should monitor all kinds of
697 * remote wakeup (SRP, normal) using their own timer
698 * to give "check cable and A-device" messages.
700 if (isp
->otg
.state
== OTG_STATE_B_SRP_INIT
)
701 b_idle(isp
, "srp_timeout");
703 omap_writew(B_SRP_TMROUT
, OTG_IRQ_SRC
);
706 /* HNP to become b_host failed */
707 } else if (otg_irq
& B_HNP_FAIL
) {
708 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
709 state_name(isp
), omap_readl(OTG_CTRL
));
712 otg_ctrl
= omap_readl(OTG_CTRL
);
713 otg_ctrl
|= OTG_BUSDROP
;
714 otg_ctrl
&= OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
715 omap_writel(otg_ctrl
, OTG_CTRL
);
717 /* subset of b_peripheral()... */
718 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
719 pr_debug(" --> b_peripheral\n");
721 omap_writew(B_HNP_FAIL
, OTG_IRQ_SRC
);
724 /* detect SRP from B-device ... */
725 } else if (otg_irq
& A_SRP_DETECT
) {
726 pr_debug("otg: %s SRP_DETECT, %06x\n",
727 state_name(isp
), omap_readl(OTG_CTRL
));
729 isp1301_defer_work(isp
, WORK_UPDATE_OTG
);
730 switch (isp
->otg
.state
) {
731 case OTG_STATE_A_IDLE
:
734 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
735 otg_ctrl
= omap_readl(OTG_CTRL
);
736 otg_ctrl
|= OTG_A_BUSREQ
;
737 otg_ctrl
&= ~(OTG_BUSDROP
|OTG_B_BUSREQ
)
740 omap_writel(otg_ctrl
, OTG_CTRL
);
746 omap_writew(A_SRP_DETECT
, OTG_IRQ_SRC
);
749 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
750 * we don't track them separately
752 } else if (otg_irq
& A_REQ_TMROUT
) {
753 otg_ctrl
= omap_readl(OTG_CTRL
);
754 pr_info("otg: BCON_TMOUT from %s, %06x\n",
755 state_name(isp
), otg_ctrl
);
758 otg_ctrl
|= OTG_BUSDROP
;
759 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
760 omap_writel(otg_ctrl
, OTG_CTRL
);
761 isp
->otg
.state
= OTG_STATE_A_WAIT_VFALL
;
763 omap_writew(A_REQ_TMROUT
, OTG_IRQ_SRC
);
766 /* A-supplied voltage fell too low; overcurrent */
767 } else if (otg_irq
& A_VBUS_ERR
) {
768 otg_ctrl
= omap_readl(OTG_CTRL
);
769 printk(KERN_ERR
"otg: %s, VBUS_ERR %04x ctrl %06x\n",
770 state_name(isp
), otg_irq
, otg_ctrl
);
772 otg_ctrl
|= OTG_BUSDROP
;
773 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
774 omap_writel(otg_ctrl
, OTG_CTRL
);
775 isp
->otg
.state
= OTG_STATE_A_VBUS_ERR
;
777 omap_writew(A_VBUS_ERR
, OTG_IRQ_SRC
);
780 /* switch driver; the transciever code activates it,
781 * ungating the udc clock or resuming OHCI.
783 } else if (otg_irq
& DRIVER_SWITCH
) {
786 otg_ctrl
= omap_readl(OTG_CTRL
);
787 printk(KERN_NOTICE
"otg: %s, SWITCH to %s, ctrl %06x\n",
789 (otg_ctrl
& OTG_DRIVER_SEL
)
792 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
794 /* role is peripheral */
795 if (otg_ctrl
& OTG_DRIVER_SEL
) {
796 switch (isp
->otg
.state
) {
797 case OTG_STATE_A_IDLE
:
798 b_idle(isp
, __func__
);
803 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
807 if (!(otg_ctrl
& OTG_ID
)) {
808 otg_ctrl
&= OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
809 omap_writel(otg_ctrl
| OTG_A_BUSREQ
, OTG_CTRL
);
813 switch (isp
->otg
.state
) {
814 case OTG_STATE_B_WAIT_ACON
:
815 isp
->otg
.state
= OTG_STATE_B_HOST
;
816 pr_debug(" --> b_host\n");
819 case OTG_STATE_A_WAIT_BCON
:
820 isp
->otg
.state
= OTG_STATE_A_HOST
;
821 pr_debug(" --> a_host\n");
823 case OTG_STATE_A_PERIPHERAL
:
824 isp
->otg
.state
= OTG_STATE_A_WAIT_BCON
;
825 pr_debug(" --> a_wait_bcon\n");
830 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
834 omap_writew(DRIVER_SWITCH
, OTG_IRQ_SRC
);
838 usb_bus_start_enum(isp
->otg
.host
,
839 isp
->otg
.host
->otg_port
);
842 check_state(isp
, __func__
);
846 static struct platform_device
*otg_dev
;
848 static int otg_init(struct isp1301
*isp
)
855 dump_regs(isp
, __func__
);
856 /* some of these values are board-specific... */
857 l
= omap_readl(OTG_SYSCON_2
);
860 | SRP_GPDATA
/* 9msec Bdev D+ pulse */
861 | SRP_GPDVBUS
/* discharge after VBUS pulse */
862 // | (3 << 24) /* 2msec VBUS pulse */
864 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
865 | SRP_DPW
/* detect 167+ns SRP pulses */
866 | SRP_DATA
| SRP_VBUS
/* accept both kinds of SRP pulse */
868 omap_writel(l
, OTG_SYSCON_2
);
870 update_otg1(isp
, isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
));
871 update_otg2(isp
, isp1301_get_u8(isp
, ISP1301_OTG_STATUS
));
873 check_state(isp
, __func__
);
874 pr_debug("otg: %s, %s %06x\n",
875 state_name(isp
), __func__
, omap_readl(OTG_CTRL
));
877 omap_writew(DRIVER_SWITCH
| OPRT_CHG
878 | B_SRP_TMROUT
| B_HNP_FAIL
879 | A_VBUS_ERR
| A_SRP_DETECT
| A_REQ_TMROUT
, OTG_IRQ_EN
);
881 l
= omap_readl(OTG_SYSCON_2
);
883 omap_writel(l
, OTG_SYSCON_2
);
888 static int otg_probe(struct platform_device
*dev
)
890 // struct omap_usb_config *config = dev->platform_data;
896 static int otg_remove(struct platform_device
*dev
)
902 struct platform_driver omap_otg_driver
= {
904 .remove
= otg_remove
,
906 .owner
= THIS_MODULE
,
911 static int otg_bind(struct isp1301
*isp
)
918 status
= platform_driver_register(&omap_otg_driver
);
923 status
= request_irq(otg_dev
->resource
[1].start
, omap_otg_irq
,
924 IRQF_DISABLED
, DRIVER_NAME
, isp
);
929 platform_driver_unregister(&omap_otg_driver
);
933 static void otg_unbind(struct isp1301
*isp
)
937 free_irq(otg_dev
->resource
[1].start
, isp
);
942 /* OTG controller isn't clocked */
944 #endif /* CONFIG_USB_OTG */
946 /*-------------------------------------------------------------------------*/
948 static void b_peripheral(struct isp1301
*isp
)
952 l
= omap_readl(OTG_CTRL
) & OTG_XCEIV_OUTPUTS
;
953 omap_writel(l
, OTG_CTRL
);
955 usb_gadget_vbus_connect(isp
->otg
.gadget
);
957 #ifdef CONFIG_USB_OTG
958 enable_vbus_draw(isp
, 8);
961 enable_vbus_draw(isp
, 100);
962 /* UDC driver just set OTG_BSESSVLD */
963 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_DP_PULLUP
);
964 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_DP_PULLDOWN
);
965 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
966 pr_debug(" --> b_peripheral\n");
967 dump_regs(isp
, "2periph");
971 static void isp_update_otg(struct isp1301
*isp
, u8 stat
)
973 u8 isp_stat
, isp_bstat
;
974 enum usb_otg_state state
= isp
->otg
.state
;
976 if (stat
& INTR_BDIS_ACON
)
977 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp
));
979 /* start certain state transitions right away */
980 isp_stat
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
);
981 if (isp_stat
& INTR_ID_GND
) {
982 if (isp
->otg
.default_a
) {
984 case OTG_STATE_B_IDLE
:
987 case OTG_STATE_A_IDLE
:
988 enable_vbus_source(isp
);
990 case OTG_STATE_A_WAIT_VRISE
:
991 /* we skip over OTG_STATE_A_WAIT_BCON, since
992 * the HC will transition to A_HOST (or
993 * A_SUSPEND!) without our noticing except
996 if (isp_stat
& INTR_VBUS_VLD
)
997 isp
->otg
.state
= OTG_STATE_A_HOST
;
999 case OTG_STATE_A_WAIT_VFALL
:
1000 if (!(isp_stat
& INTR_SESS_VLD
))
1001 a_idle(isp
, "vfell");
1004 if (!(isp_stat
& INTR_VBUS_VLD
))
1005 isp
->otg
.state
= OTG_STATE_A_VBUS_ERR
;
1008 isp_bstat
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
1011 case OTG_STATE_B_PERIPHERAL
:
1012 case OTG_STATE_B_HOST
:
1013 case OTG_STATE_B_WAIT_ACON
:
1014 usb_gadget_vbus_disconnect(isp
->otg
.gadget
);
1019 if (state
!= OTG_STATE_A_IDLE
)
1021 if (isp
->otg
.host
&& state
== OTG_STATE_A_IDLE
)
1022 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
1028 /* if user unplugged mini-A end of cable,
1029 * don't bypass A_WAIT_VFALL.
1031 if (isp
->otg
.default_a
) {
1034 isp
->otg
.state
= OTG_STATE_A_WAIT_VFALL
;
1036 case OTG_STATE_A_WAIT_VFALL
:
1037 state
= OTG_STATE_A_IDLE
;
1038 /* khubd may take a while to notice and
1039 * handle this disconnect, so don't go
1040 * to B_IDLE quite yet.
1043 case OTG_STATE_A_IDLE
:
1045 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
,
1047 isp
->otg
.state
= OTG_STATE_B_IDLE
;
1048 l
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
1049 l
&= ~OTG_CTRL_BITS
;
1050 omap_writel(l
, OTG_CTRL
);
1052 case OTG_STATE_B_IDLE
:
1056 isp_bstat
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
1058 switch (isp
->otg
.state
) {
1059 case OTG_STATE_B_PERIPHERAL
:
1060 case OTG_STATE_B_WAIT_ACON
:
1061 case OTG_STATE_B_HOST
:
1062 if (likely(isp_bstat
& OTG_B_SESS_VLD
))
1064 enable_vbus_draw(isp
, 0);
1065 #ifndef CONFIG_USB_OTG
1066 /* UDC driver will clear OTG_BSESSVLD */
1067 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
,
1069 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
,
1071 dump_regs(isp
, __func__
);
1074 case OTG_STATE_B_SRP_INIT
:
1075 b_idle(isp
, __func__
);
1076 l
= omap_readl(OTG_CTRL
) & OTG_XCEIV_OUTPUTS
;
1077 omap_writel(l
, OTG_CTRL
);
1079 case OTG_STATE_B_IDLE
:
1080 if (isp
->otg
.gadget
&& (isp_bstat
& OTG_B_SESS_VLD
)) {
1081 #ifdef CONFIG_USB_OTG
1082 update_otg1(isp
, isp_stat
);
1083 update_otg2(isp
, isp_bstat
);
1086 } else if (!(isp_stat
& (INTR_VBUS_VLD
|INTR_SESS_VLD
)))
1087 isp_bstat
|= OTG_B_SESS_END
;
1089 case OTG_STATE_A_WAIT_VFALL
:
1092 pr_debug("otg: unsupported b-device %s\n",
1098 if (state
!= isp
->otg
.state
)
1099 pr_debug(" isp, %s -> %s\n",
1100 state_string(state
), state_name(isp
));
1102 #ifdef CONFIG_USB_OTG
1103 /* update the OTG controller state to match the isp1301; may
1104 * trigger OPRT_CHG irqs for changes going to the isp1301.
1106 update_otg1(isp
, isp_stat
);
1107 update_otg2(isp
, isp_bstat
);
1108 check_state(isp
, __func__
);
1111 dump_regs(isp
, "isp1301->otg");
1114 /*-------------------------------------------------------------------------*/
1116 static u8
isp1301_clear_latch(struct isp1301
*isp
)
1118 u8 latch
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_LATCH
);
1119 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_LATCH
, latch
);
1124 isp1301_work(struct work_struct
*work
)
1126 struct isp1301
*isp
= container_of(work
, struct isp1301
, work
);
1129 /* implicit lock: we're the only task using this device */
1132 stop
= test_bit(WORK_STOP
, &isp
->todo
);
1134 #ifdef CONFIG_USB_OTG
1135 /* transfer state from otg engine to isp1301 */
1136 if (test_and_clear_bit(WORK_UPDATE_ISP
, &isp
->todo
)) {
1137 otg_update_isp(isp
);
1138 put_device(&isp
->client
.dev
);
1141 /* transfer state from isp1301 to otg engine */
1142 if (test_and_clear_bit(WORK_UPDATE_OTG
, &isp
->todo
)) {
1143 u8 stat
= isp1301_clear_latch(isp
);
1145 isp_update_otg(isp
, stat
);
1146 put_device(&isp
->client
.dev
);
1149 if (test_and_clear_bit(WORK_HOST_RESUME
, &isp
->todo
)) {
1153 * skip A_WAIT_VRISE; hc transitions invisibly
1154 * skip A_WAIT_BCON; same.
1156 switch (isp
->otg
.state
) {
1157 case OTG_STATE_A_WAIT_BCON
:
1158 case OTG_STATE_A_WAIT_VRISE
:
1159 isp
->otg
.state
= OTG_STATE_A_HOST
;
1160 pr_debug(" --> a_host\n");
1161 otg_ctrl
= omap_readl(OTG_CTRL
);
1162 otg_ctrl
|= OTG_A_BUSREQ
;
1163 otg_ctrl
&= ~(OTG_BUSDROP
|OTG_B_BUSREQ
)
1165 omap_writel(otg_ctrl
, OTG_CTRL
);
1167 case OTG_STATE_B_WAIT_ACON
:
1168 isp
->otg
.state
= OTG_STATE_B_HOST
;
1169 pr_debug(" --> b_host (acon)\n");
1171 case OTG_STATE_B_HOST
:
1172 case OTG_STATE_B_IDLE
:
1173 case OTG_STATE_A_IDLE
:
1176 pr_debug(" host resume in %s\n",
1181 put_device(&isp
->client
.dev
);
1184 if (test_and_clear_bit(WORK_TIMER
, &isp
->todo
)) {
1186 dump_regs(isp
, "timer");
1188 mod_timer(&isp
->timer
, jiffies
+ TIMER_JIFFIES
);
1190 put_device(&isp
->client
.dev
);
1194 dev_vdbg(&isp
->client
.dev
,
1195 "work done, todo = 0x%lx\n",
1198 dev_dbg(&isp
->client
.dev
, "stop\n");
1201 } while (isp
->todo
);
1205 static irqreturn_t
isp1301_irq(int irq
, void *isp
)
1207 isp1301_defer_work(isp
, WORK_UPDATE_OTG
);
1211 static void isp1301_timer(unsigned long _isp
)
1213 isp1301_defer_work((void *)_isp
, WORK_TIMER
);
1216 /*-------------------------------------------------------------------------*/
1218 static void isp1301_release(struct device
*dev
)
1220 struct isp1301
*isp
;
1222 isp
= container_of(dev
, struct isp1301
, client
.dev
);
1224 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1225 if (isp
->i2c_release
)
1226 isp
->i2c_release(dev
);
1230 static struct isp1301
*the_transceiver
;
1232 static int isp1301_detach_client(struct i2c_client
*i2c
)
1234 struct isp1301
*isp
;
1236 isp
= container_of(i2c
, struct isp1301
, client
);
1238 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_FALLING
, ~0);
1239 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_RISING
, ~0);
1240 free_irq(isp
->irq
, isp
);
1241 #ifdef CONFIG_USB_OTG
1244 if (machine_is_omap_h2())
1247 isp
->timer
.data
= 0;
1248 set_bit(WORK_STOP
, &isp
->todo
);
1249 del_timer_sync(&isp
->timer
);
1250 flush_scheduled_work();
1252 put_device(&i2c
->dev
);
1253 the_transceiver
= 0;
1255 return i2c_detach_client(i2c
);
1258 /*-------------------------------------------------------------------------*/
1260 /* NOTE: three modes are possible here, only one of which
1261 * will be standards-conformant on any given system:
1263 * - OTG mode (dual-role), required if there's a Mini-AB connector
1264 * - HOST mode, for when there's one or more A (host) connectors
1265 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1267 * As a rule, you won't have an isp1301 chip unless it's there to
1268 * support the OTG mode. Other modes help testing USB controllers
1269 * in isolation from (full) OTG support, or maybe so later board
1270 * revisions can help to support those feature.
1273 #ifdef CONFIG_USB_OTG
1275 static int isp1301_otg_enable(struct isp1301
*isp
)
1280 /* NOTE: since we don't change this, this provides
1281 * a few more interrupts than are strictly needed.
1283 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1284 INTR_VBUS_VLD
| INTR_SESS_VLD
| INTR_ID_GND
);
1285 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1286 INTR_VBUS_VLD
| INTR_SESS_VLD
| INTR_ID_GND
);
1288 dev_info(&isp
->client
.dev
, "ready for dual-role USB ...\n");
1295 /* add or disable the host device+driver */
1297 isp1301_set_host(struct otg_transceiver
*otg
, struct usb_bus
*host
)
1299 struct isp1301
*isp
= container_of(otg
, struct isp1301
, otg
);
1301 if (!otg
|| isp
!= the_transceiver
)
1305 omap_writew(0, OTG_IRQ_EN
);
1311 #ifdef CONFIG_USB_OTG
1312 isp
->otg
.host
= host
;
1313 dev_dbg(&isp
->client
.dev
, "registered host\n");
1315 if (isp
->otg
.gadget
)
1316 return isp1301_otg_enable(isp
);
1319 #elif !defined(CONFIG_USB_GADGET_OMAP)
1320 // FIXME update its refcount
1321 isp
->otg
.host
= host
;
1325 if (machine_is_omap_h2())
1326 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
1328 dev_info(&isp
->client
.dev
, "A-Host sessions ok\n");
1329 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1331 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1334 /* If this has a Mini-AB connector, this mode is highly
1335 * nonstandard ... but can be handy for testing, especially with
1336 * the Mini-A end of an OTG cable. (Or something nonstandard
1337 * like MiniB-to-StandardB, maybe built with a gender mender.)
1339 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_VBUS_DRV
);
1341 dump_regs(isp
, __func__
);
1346 dev_dbg(&isp
->client
.dev
, "host sessions not allowed\n");
1353 isp1301_set_peripheral(struct otg_transceiver
*otg
, struct usb_gadget
*gadget
)
1355 struct isp1301
*isp
= container_of(otg
, struct isp1301
, otg
);
1358 if (!otg
|| isp
!= the_transceiver
)
1362 omap_writew(0, OTG_IRQ_EN
);
1363 if (!isp
->otg
.default_a
)
1364 enable_vbus_draw(isp
, 0);
1365 usb_gadget_vbus_disconnect(isp
->otg
.gadget
);
1366 isp
->otg
.gadget
= 0;
1371 #ifdef CONFIG_USB_OTG
1372 isp
->otg
.gadget
= gadget
;
1373 dev_dbg(&isp
->client
.dev
, "registered gadget\n");
1374 /* gadget driver may be suspended until vbus_connect () */
1376 return isp1301_otg_enable(isp
);
1379 #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1380 isp
->otg
.gadget
= gadget
;
1381 // FIXME update its refcount
1383 l
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
1384 l
&= ~(OTG_XCEIV_OUTPUTS
|OTG_CTRL_BITS
);
1386 omap_writel(l
, OTG_CTRL
);
1389 isp
->otg
.state
= OTG_STATE_B_IDLE
;
1391 if (machine_is_omap_h2())
1392 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
1394 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1396 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1398 dev_info(&isp
->client
.dev
, "B-Peripheral sessions ok\n");
1399 dump_regs(isp
, __func__
);
1401 /* If this has a Mini-AB connector, this mode is highly
1402 * nonstandard ... but can be handy for testing, so long
1403 * as you don't plug a Mini-A cable into the jack.
1405 if (isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
) & INTR_VBUS_VLD
)
1411 dev_dbg(&isp
->client
.dev
, "peripheral sessions not allowed\n");
1417 /*-------------------------------------------------------------------------*/
1420 isp1301_set_power(struct otg_transceiver
*dev
, unsigned mA
)
1422 if (!the_transceiver
)
1424 if (dev
->state
== OTG_STATE_B_PERIPHERAL
)
1425 enable_vbus_draw(the_transceiver
, mA
);
1430 isp1301_start_srp(struct otg_transceiver
*dev
)
1432 struct isp1301
*isp
= container_of(dev
, struct isp1301
, otg
);
1435 if (!dev
|| isp
!= the_transceiver
1436 || isp
->otg
.state
!= OTG_STATE_B_IDLE
)
1439 otg_ctrl
= omap_readl(OTG_CTRL
);
1440 if (!(otg_ctrl
& OTG_BSESSEND
))
1443 otg_ctrl
|= OTG_B_BUSREQ
;
1444 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
;
1445 omap_writel(otg_ctrl
, OTG_CTRL
);
1446 isp
->otg
.state
= OTG_STATE_B_SRP_INIT
;
1448 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp
),
1449 omap_readl(OTG_CTRL
));
1450 #ifdef CONFIG_USB_OTG
1451 check_state(isp
, __func__
);
1457 isp1301_start_hnp(struct otg_transceiver
*dev
)
1459 #ifdef CONFIG_USB_OTG
1460 struct isp1301
*isp
= container_of(dev
, struct isp1301
, otg
);
1463 if (!dev
|| isp
!= the_transceiver
)
1465 if (isp
->otg
.default_a
&& (isp
->otg
.host
== NULL
1466 || !isp
->otg
.host
->b_hnp_enable
))
1468 if (!isp
->otg
.default_a
&& (isp
->otg
.gadget
== NULL
1469 || !isp
->otg
.gadget
->b_hnp_enable
))
1472 /* We want hardware to manage most HNP protocol timings.
1473 * So do this part as early as possible...
1475 switch (isp
->otg
.state
) {
1476 case OTG_STATE_B_HOST
:
1477 isp
->otg
.state
= OTG_STATE_B_PERIPHERAL
;
1478 /* caller will suspend next */
1480 case OTG_STATE_A_HOST
:
1482 /* autoconnect mode avoids irq latency bugs */
1483 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
,
1486 /* caller must suspend then clear A_BUSREQ */
1487 usb_gadget_vbus_connect(isp
->otg
.gadget
);
1488 l
= omap_readl(OTG_CTRL
);
1489 l
|= OTG_A_SETB_HNPEN
;
1490 omap_writel(l
, OTG_CTRL
);
1493 case OTG_STATE_A_PERIPHERAL
:
1494 /* initiated by B-Host suspend */
1499 pr_debug("otg: HNP %s, %06x ...\n",
1500 state_name(isp
), omap_readl(OTG_CTRL
));
1501 check_state(isp
, __func__
);
1509 /*-------------------------------------------------------------------------*/
1511 /* no error returns, they'd just make bus scanning stop */
1512 static int isp1301_probe(struct i2c_adapter
*bus
, int address
, int kind
)
1515 struct isp1301
*isp
;
1516 struct i2c_client
*i2c
;
1518 if (the_transceiver
)
1521 isp
= kzalloc(sizeof *isp
, GFP_KERNEL
);
1525 INIT_WORK(&isp
->work
, isp1301_work
);
1526 init_timer(&isp
->timer
);
1527 isp
->timer
.function
= isp1301_timer
;
1528 isp
->timer
.data
= (unsigned long) isp
;
1531 isp
->client
.addr
= address
;
1532 i2c_set_clientdata(&isp
->client
, isp
);
1533 isp
->client
.adapter
= bus
;
1534 isp
->client
.driver
= &isp1301_driver
;
1535 strlcpy(isp
->client
.name
, DRIVER_NAME
, I2C_NAME_SIZE
);
1538 /* if this is a true probe, verify the chip ... */
1540 status
= isp1301_get_u16(isp
, ISP1301_VENDOR_ID
);
1541 if (status
!= I2C_VENDOR_ID_PHILIPS
) {
1542 dev_dbg(&bus
->dev
, "addr %d not philips id: %d\n",
1546 status
= isp1301_get_u16(isp
, ISP1301_PRODUCT_ID
);
1547 if (status
!= I2C_PRODUCT_ID_PHILIPS_1301
) {
1548 dev_dbg(&bus
->dev
, "%d not isp1301, %d\n",
1554 status
= i2c_attach_client(i2c
);
1556 dev_dbg(&bus
->dev
, "can't attach %s to device %d, err %d\n",
1557 DRIVER_NAME
, address
, status
);
1562 isp
->i2c_release
= i2c
->dev
.release
;
1563 i2c
->dev
.release
= isp1301_release
;
1565 /* initial development used chiprev 2.00 */
1566 status
= i2c_smbus_read_word_data(i2c
, ISP1301_BCD_DEVICE
);
1567 dev_info(&i2c
->dev
, "chiprev %x.%02x, driver " DRIVER_VERSION
"\n",
1568 status
>> 8, status
& 0xff);
1570 /* make like power-on reset */
1571 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_MASK
);
1573 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_2
, MC2_BI_DI
);
1574 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_2
, ~MC2_BI_DI
);
1576 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
,
1577 OTG1_DM_PULLDOWN
| OTG1_DP_PULLDOWN
);
1578 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
,
1579 ~(OTG1_DM_PULLDOWN
| OTG1_DP_PULLDOWN
));
1581 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_LATCH
, ~0);
1582 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_FALLING
, ~0);
1583 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_RISING
, ~0);
1585 #ifdef CONFIG_USB_OTG
1586 status
= otg_bind(isp
);
1588 dev_dbg(&i2c
->dev
, "can't bind OTG\n");
1593 if (machine_is_omap_h2()) {
1594 /* full speed signaling by default */
1595 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
,
1597 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_2
,
1600 /* IRQ wired at M14 */
1601 omap_cfg_reg(M14_1510_GPIO2
);
1602 isp
->irq
= OMAP_GPIO_IRQ(2);
1603 if (gpio_request(2, "isp1301") == 0)
1604 gpio_direction_input(2);
1605 isp
->irq_type
= IRQF_TRIGGER_FALLING
;
1608 isp
->irq_type
|= IRQF_SAMPLE_RANDOM
;
1609 status
= request_irq(isp
->irq
, isp1301_irq
,
1610 isp
->irq_type
, DRIVER_NAME
, isp
);
1612 dev_dbg(&i2c
->dev
, "can't get IRQ %d, err %d\n",
1614 #ifdef CONFIG_USB_OTG
1617 i2c_detach_client(i2c
);
1621 isp
->otg
.dev
= &isp
->client
.dev
;
1622 isp
->otg
.label
= DRIVER_NAME
;
1624 isp
->otg
.set_host
= isp1301_set_host
,
1625 isp
->otg
.set_peripheral
= isp1301_set_peripheral
,
1626 isp
->otg
.set_power
= isp1301_set_power
,
1627 isp
->otg
.start_srp
= isp1301_start_srp
,
1628 isp
->otg
.start_hnp
= isp1301_start_hnp
,
1630 enable_vbus_draw(isp
, 0);
1632 the_transceiver
= isp
;
1634 #ifdef CONFIG_USB_OTG
1635 update_otg1(isp
, isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
));
1636 update_otg2(isp
, isp1301_get_u8(isp
, ISP1301_OTG_STATUS
));
1639 dump_regs(isp
, __func__
);
1642 mod_timer(&isp
->timer
, jiffies
+ TIMER_JIFFIES
);
1643 dev_dbg(&i2c
->dev
, "scheduled timer, %d min\n", TIMER_MINUTES
);
1646 status
= otg_set_transceiver(&isp
->otg
);
1648 dev_err(&i2c
->dev
, "can't register transceiver, %d\n",
1654 static int isp1301_scan_bus(struct i2c_adapter
*bus
)
1656 if (!i2c_check_functionality(bus
, I2C_FUNC_SMBUS_BYTE_DATA
1657 | I2C_FUNC_SMBUS_READ_WORD_DATA
))
1659 return i2c_probe(bus
, &addr_data
, isp1301_probe
);
1662 static struct i2c_driver isp1301_driver
= {
1664 .name
= "isp1301_omap",
1666 .attach_adapter
= isp1301_scan_bus
,
1667 .detach_client
= isp1301_detach_client
,
1670 /*-------------------------------------------------------------------------*/
1672 static int __init
isp_init(void)
1674 return i2c_add_driver(&isp1301_driver
);
1676 module_init(isp_init
);
1678 static void __exit
isp_exit(void)
1680 if (the_transceiver
)
1681 otg_set_transceiver(0);
1682 i2c_del_driver(&isp1301_driver
);
1684 module_exit(isp_exit
);