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");
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
->phy
.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
->phy
.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
283 if (!isp
->phy
.otg
->host
)
286 /* Currently ASSUMES only the OTG port matters;
287 * other ports could be active...
289 dev
= isp
->phy
.otg
->host
->controller
;
290 return dev
->driver
->suspend(dev
, 3, 0);
294 static int host_resume(struct isp1301
*isp
)
296 #ifdef NO_HOST_SUSPEND
301 if (!isp
->phy
.otg
->host
)
304 dev
= isp
->phy
.otg
->host
->controller
;
305 return dev
->driver
->resume(dev
, 0);
309 static int gadget_suspend(struct isp1301
*isp
)
311 isp
->phy
.otg
->gadget
->b_hnp_enable
= 0;
312 isp
->phy
.otg
->gadget
->a_hnp_support
= 0;
313 isp
->phy
.otg
->gadget
->a_alt_hnp_support
= 0;
314 return usb_gadget_vbus_disconnect(isp
->phy
.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
->phy
.state
== OTG_STATE_A_IDLE
)
347 isp
->phy
.otg
->default_a
= 1;
348 if (isp
->phy
.otg
->host
) {
349 isp
->phy
.otg
->host
->is_b_host
= 0;
352 if (isp
->phy
.otg
->gadget
) {
353 isp
->phy
.otg
->gadget
->is_a_peripheral
= 1;
356 isp
->phy
.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
->phy
.state
== OTG_STATE_B_IDLE
)
371 isp
->phy
.otg
->default_a
= 0;
372 if (isp
->phy
.otg
->host
) {
373 isp
->phy
.otg
->host
->is_b_host
= 1;
376 if (isp
->phy
.otg
->gadget
) {
377 isp
->phy
.otg
->gadget
->is_a_peripheral
= 0;
380 isp
->phy
.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
->phy
.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
->phy
.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
->phy
.state
== OTG_STATE_B_IDLE
514 == OTG_STATE_UNDEFINED
) {
518 } else { /* default-B */
520 if (isp
->phy
.state
== OTG_STATE_A_IDLE
521 || isp
->phy
.state
== OTG_STATE_UNDEFINED
) {
526 omap_writel(otg_ctrl
, OTG_CTRL
);
529 /* outputs from ISP1301_OTG_STATUS */
530 static void update_otg2(struct isp1301
*isp
, u8 otg_status
)
534 otg_ctrl
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
535 otg_ctrl
&= ~OTG_XCEIV_INPUTS
;
536 otg_ctrl
&= ~(OTG_BSESSVLD
| OTG_BSESSEND
);
537 if (otg_status
& OTG_B_SESS_VLD
)
538 otg_ctrl
|= OTG_BSESSVLD
;
539 else if (otg_status
& OTG_B_SESS_END
)
540 otg_ctrl
|= OTG_BSESSEND
;
541 omap_writel(otg_ctrl
, OTG_CTRL
);
544 /* inputs going to ISP1301 */
545 static void otg_update_isp(struct isp1301
*isp
)
547 u32 otg_ctrl
, otg_change
;
548 u8 set
= OTG1_DM_PULLDOWN
, clr
= OTG1_DM_PULLUP
;
550 otg_ctrl
= omap_readl(OTG_CTRL
);
551 otg_change
= otg_ctrl
^ isp
->last_otg_ctrl
;
552 isp
->last_otg_ctrl
= otg_ctrl
;
553 otg_ctrl
= otg_ctrl
& OTG_XCEIV_INPUTS
;
555 switch (isp
->phy
.state
) {
556 case OTG_STATE_B_IDLE
:
557 case OTG_STATE_B_PERIPHERAL
:
558 case OTG_STATE_B_SRP_INIT
:
559 if (!(otg_ctrl
& OTG_PULLUP
)) {
560 // if (otg_ctrl & OTG_B_HNPEN) {
561 if (isp
->phy
.otg
->gadget
->b_hnp_enable
) {
562 isp
->phy
.state
= OTG_STATE_B_WAIT_ACON
;
563 pr_debug(" --> b_wait_acon\n");
568 set
|= OTG1_DP_PULLUP
;
569 clr
|= OTG1_DP_PULLDOWN
;
571 case OTG_STATE_A_SUSPEND
:
572 case OTG_STATE_A_PERIPHERAL
:
573 if (otg_ctrl
& OTG_PULLUP
)
576 // case OTG_STATE_B_WAIT_ACON:
579 set
|= OTG1_DP_PULLDOWN
;
580 clr
|= OTG1_DP_PULLUP
;
584 # define toggle(OTG,ISP) do { \
585 if (otg_ctrl & OTG) set |= ISP; \
589 if (!(isp
->phy
.otg
->host
))
590 otg_ctrl
&= ~OTG_DRV_VBUS
;
592 switch (isp
->phy
.state
) {
593 case OTG_STATE_A_SUSPEND
:
594 if (otg_ctrl
& OTG_DRV_VBUS
) {
595 set
|= OTG1_VBUS_DRV
;
598 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
602 case OTG_STATE_A_VBUS_ERR
:
603 isp
->phy
.state
= OTG_STATE_A_WAIT_VFALL
;
604 pr_debug(" --> a_wait_vfall\n");
606 case OTG_STATE_A_WAIT_VFALL
:
607 /* FIXME usbcore thinks port power is still on ... */
608 clr
|= OTG1_VBUS_DRV
;
610 case OTG_STATE_A_IDLE
:
611 if (otg_ctrl
& OTG_DRV_VBUS
) {
612 isp
->phy
.state
= OTG_STATE_A_WAIT_VRISE
;
613 pr_debug(" --> a_wait_vrise\n");
617 toggle(OTG_DRV_VBUS
, OTG1_VBUS_DRV
);
620 toggle(OTG_PU_VBUS
, OTG1_VBUS_CHRG
);
621 toggle(OTG_PD_VBUS
, OTG1_VBUS_DISCHRG
);
625 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, set
);
626 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, clr
);
628 /* HNP switch to host or peripheral; and SRP */
629 if (otg_change
& OTG_PULLUP
) {
632 switch (isp
->phy
.state
) {
633 case OTG_STATE_B_IDLE
:
634 if (clr
& OTG1_DP_PULLUP
)
636 isp
->phy
.state
= OTG_STATE_B_PERIPHERAL
;
637 pr_debug(" --> b_peripheral\n");
639 case OTG_STATE_A_SUSPEND
:
640 if (clr
& OTG1_DP_PULLUP
)
642 isp
->phy
.state
= OTG_STATE_A_PERIPHERAL
;
643 pr_debug(" --> a_peripheral\n");
648 l
= omap_readl(OTG_CTRL
);
650 omap_writel(l
, OTG_CTRL
);
653 check_state(isp
, __func__
);
654 dump_regs(isp
, "otg->isp1301");
657 static irqreturn_t
omap_otg_irq(int irq
, void *_isp
)
659 u16 otg_irq
= omap_readw(OTG_IRQ_SRC
);
662 struct isp1301
*isp
= _isp
;
663 struct usb_otg
*otg
= isp
->phy
.otg
;
665 /* update ISP1301 transceiver from OTG controller */
666 if (otg_irq
& OPRT_CHG
) {
667 omap_writew(OPRT_CHG
, OTG_IRQ_SRC
);
668 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
671 /* SRP to become b_peripheral failed */
672 } else if (otg_irq
& B_SRP_TMROUT
) {
673 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL
));
676 /* gadget drivers that care should monitor all kinds of
677 * remote wakeup (SRP, normal) using their own timer
678 * to give "check cable and A-device" messages.
680 if (isp
->phy
.state
== OTG_STATE_B_SRP_INIT
)
681 b_idle(isp
, "srp_timeout");
683 omap_writew(B_SRP_TMROUT
, OTG_IRQ_SRC
);
686 /* HNP to become b_host failed */
687 } else if (otg_irq
& B_HNP_FAIL
) {
688 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
689 state_name(isp
), omap_readl(OTG_CTRL
));
692 otg_ctrl
= omap_readl(OTG_CTRL
);
693 otg_ctrl
|= OTG_BUSDROP
;
694 otg_ctrl
&= OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
695 omap_writel(otg_ctrl
, OTG_CTRL
);
697 /* subset of b_peripheral()... */
698 isp
->phy
.state
= OTG_STATE_B_PERIPHERAL
;
699 pr_debug(" --> b_peripheral\n");
701 omap_writew(B_HNP_FAIL
, OTG_IRQ_SRC
);
704 /* detect SRP from B-device ... */
705 } else if (otg_irq
& A_SRP_DETECT
) {
706 pr_debug("otg: %s SRP_DETECT, %06x\n",
707 state_name(isp
), omap_readl(OTG_CTRL
));
709 isp1301_defer_work(isp
, WORK_UPDATE_OTG
);
710 switch (isp
->phy
.state
) {
711 case OTG_STATE_A_IDLE
:
714 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
715 otg_ctrl
= omap_readl(OTG_CTRL
);
716 otg_ctrl
|= OTG_A_BUSREQ
;
717 otg_ctrl
&= ~(OTG_BUSDROP
|OTG_B_BUSREQ
)
720 omap_writel(otg_ctrl
, OTG_CTRL
);
726 omap_writew(A_SRP_DETECT
, OTG_IRQ_SRC
);
729 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
730 * we don't track them separately
732 } else if (otg_irq
& A_REQ_TMROUT
) {
733 otg_ctrl
= omap_readl(OTG_CTRL
);
734 pr_info("otg: BCON_TMOUT from %s, %06x\n",
735 state_name(isp
), otg_ctrl
);
738 otg_ctrl
|= OTG_BUSDROP
;
739 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
740 omap_writel(otg_ctrl
, OTG_CTRL
);
741 isp
->phy
.state
= OTG_STATE_A_WAIT_VFALL
;
743 omap_writew(A_REQ_TMROUT
, OTG_IRQ_SRC
);
746 /* A-supplied voltage fell too low; overcurrent */
747 } else if (otg_irq
& A_VBUS_ERR
) {
748 otg_ctrl
= omap_readl(OTG_CTRL
);
749 printk(KERN_ERR
"otg: %s, VBUS_ERR %04x ctrl %06x\n",
750 state_name(isp
), otg_irq
, otg_ctrl
);
752 otg_ctrl
|= OTG_BUSDROP
;
753 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
754 omap_writel(otg_ctrl
, OTG_CTRL
);
755 isp
->phy
.state
= OTG_STATE_A_VBUS_ERR
;
757 omap_writew(A_VBUS_ERR
, OTG_IRQ_SRC
);
760 /* switch driver; the transceiver code activates it,
761 * ungating the udc clock or resuming OHCI.
763 } else if (otg_irq
& DRIVER_SWITCH
) {
766 otg_ctrl
= omap_readl(OTG_CTRL
);
767 printk(KERN_NOTICE
"otg: %s, SWITCH to %s, ctrl %06x\n",
769 (otg_ctrl
& OTG_DRIVER_SEL
)
772 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
774 /* role is peripheral */
775 if (otg_ctrl
& OTG_DRIVER_SEL
) {
776 switch (isp
->phy
.state
) {
777 case OTG_STATE_A_IDLE
:
778 b_idle(isp
, __func__
);
783 isp1301_defer_work(isp
, WORK_UPDATE_ISP
);
787 if (!(otg_ctrl
& OTG_ID
)) {
788 otg_ctrl
&= OTG_CTRL_MASK
& ~OTG_XCEIV_INPUTS
;
789 omap_writel(otg_ctrl
| OTG_A_BUSREQ
, OTG_CTRL
);
793 switch (isp
->phy
.state
) {
794 case OTG_STATE_B_WAIT_ACON
:
795 isp
->phy
.state
= OTG_STATE_B_HOST
;
796 pr_debug(" --> b_host\n");
799 case OTG_STATE_A_WAIT_BCON
:
800 isp
->phy
.state
= OTG_STATE_A_HOST
;
801 pr_debug(" --> a_host\n");
803 case OTG_STATE_A_PERIPHERAL
:
804 isp
->phy
.state
= OTG_STATE_A_WAIT_BCON
;
805 pr_debug(" --> a_wait_bcon\n");
810 isp1301_defer_work(isp
, WORK_HOST_RESUME
);
814 omap_writew(DRIVER_SWITCH
, OTG_IRQ_SRC
);
818 usb_bus_start_enum(otg
->host
, otg
->host
->otg_port
);
821 check_state(isp
, __func__
);
825 static struct platform_device
*otg_dev
;
827 static int isp1301_otg_init(struct isp1301
*isp
)
834 dump_regs(isp
, __func__
);
835 /* some of these values are board-specific... */
836 l
= omap_readl(OTG_SYSCON_2
);
839 | SRP_GPDATA
/* 9msec Bdev D+ pulse */
840 | SRP_GPDVBUS
/* discharge after VBUS pulse */
841 // | (3 << 24) /* 2msec VBUS pulse */
843 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
844 | SRP_DPW
/* detect 167+ns SRP pulses */
845 | SRP_DATA
| SRP_VBUS
/* accept both kinds of SRP pulse */
847 omap_writel(l
, OTG_SYSCON_2
);
849 update_otg1(isp
, isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
));
850 update_otg2(isp
, isp1301_get_u8(isp
, ISP1301_OTG_STATUS
));
852 check_state(isp
, __func__
);
853 pr_debug("otg: %s, %s %06x\n",
854 state_name(isp
), __func__
, omap_readl(OTG_CTRL
));
856 omap_writew(DRIVER_SWITCH
| OPRT_CHG
857 | B_SRP_TMROUT
| B_HNP_FAIL
858 | A_VBUS_ERR
| A_SRP_DETECT
| A_REQ_TMROUT
, OTG_IRQ_EN
);
860 l
= omap_readl(OTG_SYSCON_2
);
862 omap_writel(l
, OTG_SYSCON_2
);
867 static int otg_probe(struct platform_device
*dev
)
869 // struct omap_usb_config *config = dev->platform_data;
875 static int otg_remove(struct platform_device
*dev
)
881 static struct platform_driver omap_otg_driver
= {
883 .remove
= otg_remove
,
885 .owner
= THIS_MODULE
,
890 static int otg_bind(struct isp1301
*isp
)
897 status
= platform_driver_register(&omap_otg_driver
);
902 status
= request_irq(otg_dev
->resource
[1].start
, omap_otg_irq
,
903 0, DRIVER_NAME
, isp
);
908 platform_driver_unregister(&omap_otg_driver
);
912 static void otg_unbind(struct isp1301
*isp
)
916 free_irq(otg_dev
->resource
[1].start
, isp
);
921 /* OTG controller isn't clocked */
923 #endif /* CONFIG_USB_OTG */
925 /*-------------------------------------------------------------------------*/
927 static void b_peripheral(struct isp1301
*isp
)
931 l
= omap_readl(OTG_CTRL
) & OTG_XCEIV_OUTPUTS
;
932 omap_writel(l
, OTG_CTRL
);
934 usb_gadget_vbus_connect(isp
->phy
.otg
->gadget
);
936 #ifdef CONFIG_USB_OTG
937 enable_vbus_draw(isp
, 8);
940 enable_vbus_draw(isp
, 100);
941 /* UDC driver just set OTG_BSESSVLD */
942 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_DP_PULLUP
);
943 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_DP_PULLDOWN
);
944 isp
->phy
.state
= OTG_STATE_B_PERIPHERAL
;
945 pr_debug(" --> b_peripheral\n");
946 dump_regs(isp
, "2periph");
950 static void isp_update_otg(struct isp1301
*isp
, u8 stat
)
952 struct usb_otg
*otg
= isp
->phy
.otg
;
953 u8 isp_stat
, isp_bstat
;
954 enum usb_otg_state state
= isp
->phy
.state
;
956 if (stat
& INTR_BDIS_ACON
)
957 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp
));
959 /* start certain state transitions right away */
960 isp_stat
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
);
961 if (isp_stat
& INTR_ID_GND
) {
962 if (otg
->default_a
) {
964 case OTG_STATE_B_IDLE
:
967 case OTG_STATE_A_IDLE
:
968 enable_vbus_source(isp
);
970 case OTG_STATE_A_WAIT_VRISE
:
971 /* we skip over OTG_STATE_A_WAIT_BCON, since
972 * the HC will transition to A_HOST (or
973 * A_SUSPEND!) without our noticing except
976 if (isp_stat
& INTR_VBUS_VLD
)
977 isp
->phy
.state
= OTG_STATE_A_HOST
;
979 case OTG_STATE_A_WAIT_VFALL
:
980 if (!(isp_stat
& INTR_SESS_VLD
))
981 a_idle(isp
, "vfell");
984 if (!(isp_stat
& INTR_VBUS_VLD
))
985 isp
->phy
.state
= OTG_STATE_A_VBUS_ERR
;
988 isp_bstat
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
991 case OTG_STATE_B_PERIPHERAL
:
992 case OTG_STATE_B_HOST
:
993 case OTG_STATE_B_WAIT_ACON
:
994 usb_gadget_vbus_disconnect(otg
->gadget
);
999 if (state
!= OTG_STATE_A_IDLE
)
1001 if (otg
->host
&& state
== OTG_STATE_A_IDLE
)
1002 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 (otg
->default_a
) {
1014 isp
->phy
.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
->phy
.state
= OTG_STATE_B_IDLE
;
1028 l
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
1029 l
&= ~OTG_CTRL_BITS
;
1030 omap_writel(l
, OTG_CTRL
);
1032 case OTG_STATE_B_IDLE
:
1036 isp_bstat
= isp1301_get_u8(isp
, ISP1301_OTG_STATUS
);
1038 switch (isp
->phy
.state
) {
1039 case OTG_STATE_B_PERIPHERAL
:
1040 case OTG_STATE_B_WAIT_ACON
:
1041 case OTG_STATE_B_HOST
:
1042 if (likely(isp_bstat
& OTG_B_SESS_VLD
))
1044 enable_vbus_draw(isp
, 0);
1045 #ifndef CONFIG_USB_OTG
1046 /* UDC driver will clear OTG_BSESSVLD */
1047 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
,
1049 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
,
1051 dump_regs(isp
, __func__
);
1054 case OTG_STATE_B_SRP_INIT
:
1055 b_idle(isp
, __func__
);
1056 l
= omap_readl(OTG_CTRL
) & OTG_XCEIV_OUTPUTS
;
1057 omap_writel(l
, OTG_CTRL
);
1059 case OTG_STATE_B_IDLE
:
1060 if (otg
->gadget
&& (isp_bstat
& OTG_B_SESS_VLD
)) {
1061 #ifdef CONFIG_USB_OTG
1062 update_otg1(isp
, isp_stat
);
1063 update_otg2(isp
, isp_bstat
);
1066 } else if (!(isp_stat
& (INTR_VBUS_VLD
|INTR_SESS_VLD
)))
1067 isp_bstat
|= OTG_B_SESS_END
;
1069 case OTG_STATE_A_WAIT_VFALL
:
1072 pr_debug("otg: unsupported b-device %s\n",
1078 if (state
!= isp
->phy
.state
)
1079 pr_debug(" isp, %s -> %s\n",
1080 otg_state_string(state
), state_name(isp
));
1082 #ifdef CONFIG_USB_OTG
1083 /* update the OTG controller state to match the isp1301; may
1084 * trigger OPRT_CHG irqs for changes going to the isp1301.
1086 update_otg1(isp
, isp_stat
);
1087 update_otg2(isp
, isp_bstat
);
1088 check_state(isp
, __func__
);
1091 dump_regs(isp
, "isp1301->otg");
1094 /*-------------------------------------------------------------------------*/
1096 static u8
isp1301_clear_latch(struct isp1301
*isp
)
1098 u8 latch
= isp1301_get_u8(isp
, ISP1301_INTERRUPT_LATCH
);
1099 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_LATCH
, latch
);
1104 isp1301_work(struct work_struct
*work
)
1106 struct isp1301
*isp
= container_of(work
, struct isp1301
, work
);
1109 /* implicit lock: we're the only task using this device */
1112 stop
= test_bit(WORK_STOP
, &isp
->todo
);
1114 #ifdef CONFIG_USB_OTG
1115 /* transfer state from otg engine to isp1301 */
1116 if (test_and_clear_bit(WORK_UPDATE_ISP
, &isp
->todo
)) {
1117 otg_update_isp(isp
);
1118 put_device(&isp
->client
->dev
);
1121 /* transfer state from isp1301 to otg engine */
1122 if (test_and_clear_bit(WORK_UPDATE_OTG
, &isp
->todo
)) {
1123 u8 stat
= isp1301_clear_latch(isp
);
1125 isp_update_otg(isp
, stat
);
1126 put_device(&isp
->client
->dev
);
1129 if (test_and_clear_bit(WORK_HOST_RESUME
, &isp
->todo
)) {
1133 * skip A_WAIT_VRISE; hc transitions invisibly
1134 * skip A_WAIT_BCON; same.
1136 switch (isp
->phy
.state
) {
1137 case OTG_STATE_A_WAIT_BCON
:
1138 case OTG_STATE_A_WAIT_VRISE
:
1139 isp
->phy
.state
= OTG_STATE_A_HOST
;
1140 pr_debug(" --> a_host\n");
1141 otg_ctrl
= omap_readl(OTG_CTRL
);
1142 otg_ctrl
|= OTG_A_BUSREQ
;
1143 otg_ctrl
&= ~(OTG_BUSDROP
|OTG_B_BUSREQ
)
1145 omap_writel(otg_ctrl
, OTG_CTRL
);
1147 case OTG_STATE_B_WAIT_ACON
:
1148 isp
->phy
.state
= OTG_STATE_B_HOST
;
1149 pr_debug(" --> b_host (acon)\n");
1151 case OTG_STATE_B_HOST
:
1152 case OTG_STATE_B_IDLE
:
1153 case OTG_STATE_A_IDLE
:
1156 pr_debug(" host resume in %s\n",
1161 put_device(&isp
->client
->dev
);
1164 if (test_and_clear_bit(WORK_TIMER
, &isp
->todo
)) {
1166 dump_regs(isp
, "timer");
1168 mod_timer(&isp
->timer
, jiffies
+ TIMER_JIFFIES
);
1170 put_device(&isp
->client
->dev
);
1174 dev_vdbg(&isp
->client
->dev
,
1175 "work done, todo = 0x%lx\n",
1178 dev_dbg(&isp
->client
->dev
, "stop\n");
1181 } while (isp
->todo
);
1185 static irqreturn_t
isp1301_irq(int irq
, void *isp
)
1187 isp1301_defer_work(isp
, WORK_UPDATE_OTG
);
1191 static void isp1301_timer(unsigned long _isp
)
1193 isp1301_defer_work((void *)_isp
, WORK_TIMER
);
1196 /*-------------------------------------------------------------------------*/
1198 static void isp1301_release(struct device
*dev
)
1200 struct isp1301
*isp
;
1202 isp
= dev_get_drvdata(dev
);
1204 /* FIXME -- not with a "new style" driver, it doesn't!! */
1206 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1207 if (isp
->i2c_release
)
1208 isp
->i2c_release(dev
);
1209 kfree(isp
->phy
.otg
);
1213 static struct isp1301
*the_transceiver
;
1215 static int __exit
isp1301_remove(struct i2c_client
*i2c
)
1217 struct isp1301
*isp
;
1219 isp
= i2c_get_clientdata(i2c
);
1221 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_FALLING
, ~0);
1222 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_RISING
, ~0);
1223 free_irq(i2c
->irq
, isp
);
1224 #ifdef CONFIG_USB_OTG
1227 if (machine_is_omap_h2())
1230 isp
->timer
.data
= 0;
1231 set_bit(WORK_STOP
, &isp
->todo
);
1232 del_timer_sync(&isp
->timer
);
1233 flush_work_sync(&isp
->work
);
1235 put_device(&i2c
->dev
);
1236 the_transceiver
= NULL
;
1241 /*-------------------------------------------------------------------------*/
1243 /* NOTE: three modes are possible here, only one of which
1244 * will be standards-conformant on any given system:
1246 * - OTG mode (dual-role), required if there's a Mini-AB connector
1247 * - HOST mode, for when there's one or more A (host) connectors
1248 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1250 * As a rule, you won't have an isp1301 chip unless it's there to
1251 * support the OTG mode. Other modes help testing USB controllers
1252 * in isolation from (full) OTG support, or maybe so later board
1253 * revisions can help to support those feature.
1256 #ifdef CONFIG_USB_OTG
1258 static int isp1301_otg_enable(struct isp1301
*isp
)
1261 isp1301_otg_init(isp
);
1263 /* NOTE: since we don't change this, this provides
1264 * a few more interrupts than are strictly needed.
1266 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1267 INTR_VBUS_VLD
| INTR_SESS_VLD
| INTR_ID_GND
);
1268 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1269 INTR_VBUS_VLD
| INTR_SESS_VLD
| INTR_ID_GND
);
1271 dev_info(&isp
->client
->dev
, "ready for dual-role USB ...\n");
1278 /* add or disable the host device+driver */
1280 isp1301_set_host(struct usb_otg
*otg
, struct usb_bus
*host
)
1282 struct isp1301
*isp
= container_of(otg
->phy
, struct isp1301
, phy
);
1284 if (!otg
|| isp
!= the_transceiver
)
1288 omap_writew(0, OTG_IRQ_EN
);
1294 #ifdef CONFIG_USB_OTG
1296 dev_dbg(&isp
->client
->dev
, "registered host\n");
1299 return isp1301_otg_enable(isp
);
1302 #elif !defined(CONFIG_USB_GADGET_OMAP)
1303 // FIXME update its refcount
1308 if (machine_is_omap_h2())
1309 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
1311 dev_info(&isp
->client
->dev
, "A-Host sessions ok\n");
1312 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1314 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1317 /* If this has a Mini-AB connector, this mode is highly
1318 * nonstandard ... but can be handy for testing, especially with
1319 * the Mini-A end of an OTG cable. (Or something nonstandard
1320 * like MiniB-to-StandardB, maybe built with a gender mender.)
1322 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
, OTG1_VBUS_DRV
);
1324 dump_regs(isp
, __func__
);
1329 dev_dbg(&isp
->client
->dev
, "host sessions not allowed\n");
1336 isp1301_set_peripheral(struct usb_otg
*otg
, struct usb_gadget
*gadget
)
1338 struct isp1301
*isp
= container_of(otg
->phy
, struct isp1301
, phy
);
1340 if (!otg
|| isp
!= the_transceiver
)
1344 omap_writew(0, OTG_IRQ_EN
);
1345 if (!otg
->default_a
)
1346 enable_vbus_draw(isp
, 0);
1347 usb_gadget_vbus_disconnect(otg
->gadget
);
1353 #ifdef CONFIG_USB_OTG
1354 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 otg
->gadget
= gadget
;
1363 // FIXME update its refcount
1368 l
= omap_readl(OTG_CTRL
) & OTG_CTRL_MASK
;
1369 l
&= ~(OTG_XCEIV_OUTPUTS
|OTG_CTRL_BITS
);
1371 omap_writel(l
, OTG_CTRL
);
1375 isp
->phy
.state
= OTG_STATE_B_IDLE
;
1377 if (machine_is_omap_h2() || machine_is_omap_h3())
1378 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_DAT_SE0
);
1380 isp1301_set_bits(isp
, ISP1301_INTERRUPT_RISING
,
1382 isp1301_set_bits(isp
, ISP1301_INTERRUPT_FALLING
,
1384 dev_info(&isp
->client
->dev
, "B-Peripheral sessions ok\n");
1385 dump_regs(isp
, __func__
);
1387 /* If this has a Mini-AB connector, this mode is highly
1388 * nonstandard ... but can be handy for testing, so long
1389 * as you don't plug a Mini-A cable into the jack.
1391 if (isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
) & INTR_VBUS_VLD
)
1397 dev_dbg(&isp
->client
->dev
, "peripheral sessions not allowed\n");
1403 /*-------------------------------------------------------------------------*/
1406 isp1301_set_power(struct usb_phy
*dev
, unsigned mA
)
1408 if (!the_transceiver
)
1410 if (dev
->state
== OTG_STATE_B_PERIPHERAL
)
1411 enable_vbus_draw(the_transceiver
, mA
);
1416 isp1301_start_srp(struct usb_otg
*otg
)
1418 struct isp1301
*isp
= container_of(otg
->phy
, struct isp1301
, phy
);
1421 if (!otg
|| isp
!= the_transceiver
1422 || isp
->phy
.state
!= OTG_STATE_B_IDLE
)
1425 otg_ctrl
= omap_readl(OTG_CTRL
);
1426 if (!(otg_ctrl
& OTG_BSESSEND
))
1429 otg_ctrl
|= OTG_B_BUSREQ
;
1430 otg_ctrl
&= ~OTG_A_BUSREQ
& OTG_CTRL_MASK
;
1431 omap_writel(otg_ctrl
, OTG_CTRL
);
1432 isp
->phy
.state
= OTG_STATE_B_SRP_INIT
;
1434 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp
),
1435 omap_readl(OTG_CTRL
));
1436 #ifdef CONFIG_USB_OTG
1437 check_state(isp
, __func__
);
1443 isp1301_start_hnp(struct usb_otg
*otg
)
1445 #ifdef CONFIG_USB_OTG
1446 struct isp1301
*isp
= container_of(otg
->phy
, struct isp1301
, phy
);
1449 if (!otg
|| isp
!= the_transceiver
)
1451 if (otg
->default_a
&& (otg
->host
== NULL
|| !otg
->host
->b_hnp_enable
))
1453 if (!otg
->default_a
&& (otg
->gadget
== NULL
1454 || !otg
->gadget
->b_hnp_enable
))
1457 /* We want hardware to manage most HNP protocol timings.
1458 * So do this part as early as possible...
1460 switch (isp
->phy
.state
) {
1461 case OTG_STATE_B_HOST
:
1462 isp
->phy
.state
= OTG_STATE_B_PERIPHERAL
;
1463 /* caller will suspend next */
1465 case OTG_STATE_A_HOST
:
1467 /* autoconnect mode avoids irq latency bugs */
1468 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
,
1471 /* caller must suspend then clear A_BUSREQ */
1472 usb_gadget_vbus_connect(otg
->gadget
);
1473 l
= omap_readl(OTG_CTRL
);
1474 l
|= OTG_A_SETB_HNPEN
;
1475 omap_writel(l
, OTG_CTRL
);
1478 case OTG_STATE_A_PERIPHERAL
:
1479 /* initiated by B-Host suspend */
1484 pr_debug("otg: HNP %s, %06x ...\n",
1485 state_name(isp
), omap_readl(OTG_CTRL
));
1486 check_state(isp
, __func__
);
1494 /*-------------------------------------------------------------------------*/
1496 static int __devinit
1497 isp1301_probe(struct i2c_client
*i2c
, const struct i2c_device_id
*id
)
1500 struct isp1301
*isp
;
1502 if (the_transceiver
)
1505 isp
= kzalloc(sizeof *isp
, GFP_KERNEL
);
1509 isp
->phy
.otg
= kzalloc(sizeof *isp
->phy
.otg
, GFP_KERNEL
);
1510 if (!isp
->phy
.otg
) {
1515 INIT_WORK(&isp
->work
, isp1301_work
);
1516 init_timer(&isp
->timer
);
1517 isp
->timer
.function
= isp1301_timer
;
1518 isp
->timer
.data
= (unsigned long) isp
;
1520 i2c_set_clientdata(i2c
, isp
);
1523 /* verify the chip (shouldn't be necessary) */
1524 status
= isp1301_get_u16(isp
, ISP1301_VENDOR_ID
);
1525 if (status
!= I2C_VENDOR_ID_PHILIPS
) {
1526 dev_dbg(&i2c
->dev
, "not philips id: %d\n", status
);
1529 status
= isp1301_get_u16(isp
, ISP1301_PRODUCT_ID
);
1530 if (status
!= I2C_PRODUCT_ID_PHILIPS_1301
) {
1531 dev_dbg(&i2c
->dev
, "not isp1301, %d\n", status
);
1534 isp
->i2c_release
= i2c
->dev
.release
;
1535 i2c
->dev
.release
= isp1301_release
;
1537 /* initial development used chiprev 2.00 */
1538 status
= i2c_smbus_read_word_data(i2c
, ISP1301_BCD_DEVICE
);
1539 dev_info(&i2c
->dev
, "chiprev %x.%02x, driver " DRIVER_VERSION
"\n",
1540 status
>> 8, status
& 0xff);
1542 /* make like power-on reset */
1543 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_1
, MC1_MASK
);
1545 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_2
, MC2_BI_DI
);
1546 isp1301_clear_bits(isp
, ISP1301_MODE_CONTROL_2
, ~MC2_BI_DI
);
1548 isp1301_set_bits(isp
, ISP1301_OTG_CONTROL_1
,
1549 OTG1_DM_PULLDOWN
| OTG1_DP_PULLDOWN
);
1550 isp1301_clear_bits(isp
, ISP1301_OTG_CONTROL_1
,
1551 ~(OTG1_DM_PULLDOWN
| OTG1_DP_PULLDOWN
));
1553 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_LATCH
, ~0);
1554 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_FALLING
, ~0);
1555 isp1301_clear_bits(isp
, ISP1301_INTERRUPT_RISING
, ~0);
1557 #ifdef CONFIG_USB_OTG
1558 status
= otg_bind(isp
);
1560 dev_dbg(&i2c
->dev
, "can't bind OTG\n");
1565 if (machine_is_omap_h2()) {
1566 /* full speed signaling by default */
1567 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_1
,
1569 isp1301_set_bits(isp
, ISP1301_MODE_CONTROL_2
,
1572 /* IRQ wired at M14 */
1573 omap_cfg_reg(M14_1510_GPIO2
);
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(i2c
->irq
, isp1301_irq
,
1581 isp
->irq_type
, DRIVER_NAME
, isp
);
1583 dev_dbg(&i2c
->dev
, "can't get IRQ %d, err %d\n",
1588 isp
->phy
.dev
= &i2c
->dev
;
1589 isp
->phy
.label
= DRIVER_NAME
;
1590 isp
->phy
.set_power
= isp1301_set_power
,
1592 isp
->phy
.otg
->phy
= &isp
->phy
;
1593 isp
->phy
.otg
->set_host
= isp1301_set_host
,
1594 isp
->phy
.otg
->set_peripheral
= isp1301_set_peripheral
,
1595 isp
->phy
.otg
->start_srp
= isp1301_start_srp
,
1596 isp
->phy
.otg
->start_hnp
= isp1301_start_hnp
,
1598 enable_vbus_draw(isp
, 0);
1600 the_transceiver
= isp
;
1602 #ifdef CONFIG_USB_OTG
1603 update_otg1(isp
, isp1301_get_u8(isp
, ISP1301_INTERRUPT_SOURCE
));
1604 update_otg2(isp
, isp1301_get_u8(isp
, ISP1301_OTG_STATUS
));
1607 dump_regs(isp
, __func__
);
1610 mod_timer(&isp
->timer
, jiffies
+ TIMER_JIFFIES
);
1611 dev_dbg(&i2c
->dev
, "scheduled timer, %d min\n", TIMER_MINUTES
);
1614 status
= usb_add_phy(&isp
->phy
, USB_PHY_TYPE_USB2
);
1616 dev_err(&i2c
->dev
, "can't register transceiver, %d\n",
1622 kfree(isp
->phy
.otg
);
1627 static const struct i2c_device_id isp1301_id
[] = {
1628 { "isp1301_omap", 0 },
1631 MODULE_DEVICE_TABLE(i2c
, isp1301_id
);
1633 static struct i2c_driver isp1301_driver
= {
1635 .name
= "isp1301_omap",
1637 .probe
= isp1301_probe
,
1638 .remove
= __exit_p(isp1301_remove
),
1639 .id_table
= isp1301_id
,
1642 /*-------------------------------------------------------------------------*/
1644 static int __init
isp_init(void)
1646 return i2c_add_driver(&isp1301_driver
);
1648 subsys_initcall(isp_init
);
1650 static void __exit
isp_exit(void)
1652 if (the_transceiver
)
1653 usb_remove_phy(&the_transceiver
->phy
);
1654 i2c_del_driver(&isp1301_driver
);
1656 module_exit(isp_exit
);