2 * core.c - ChipIdea USB IP core family device controller
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
14 * Description: ChipIdea USB IP core family device controller
16 * This driver is composed of several blocks:
17 * - HW: hardware interface
18 * - DBG: debug facilities (optional)
20 * - ISR: interrupts handling
21 * - ENDPT: endpoint operations (Gadget API)
22 * - GADGET: gadget operations (Gadget API)
23 * - BUS: bus glue code, bus abstraction layer
26 * - CONFIG_USB_CHIPIDEA_DEBUG: enable debug facilities
27 * - STALL_IN: non-empty bulk-in pipes cannot be halted
28 * if defined mass storage compliance succeeds but with warnings
32 * if undefined usbtest 13 fails
33 * - TRACE: enable function tracing (depends on DEBUG)
36 * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
37 * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
38 * - Normal & LPM support
41 * - OK: 0-12, 13 (STALL_IN defined) & 14
42 * - Not Supported: 15 & 16 (ISO)
45 * - Suspend & Remote Wakeup
47 #include <linux/delay.h>
48 #include <linux/device.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/phy/phy.h>
51 #include <linux/platform_device.h>
52 #include <linux/module.h>
53 #include <linux/idr.h>
54 #include <linux/interrupt.h>
56 #include <linux/kernel.h>
57 #include <linux/slab.h>
58 #include <linux/pm_runtime.h>
59 #include <linux/usb/ch9.h>
60 #include <linux/usb/gadget.h>
61 #include <linux/usb/otg.h>
62 #include <linux/usb/chipidea.h>
63 #include <linux/usb/of.h>
65 #include <linux/phy.h>
66 #include <linux/regulator/consumer.h>
76 /* Controller register map */
77 static const u8 ci_regs_nolpm
[] = {
78 [CAP_CAPLENGTH
] = 0x00U
,
79 [CAP_HCCPARAMS
] = 0x08U
,
80 [CAP_DCCPARAMS
] = 0x24U
,
81 [CAP_TESTMODE
] = 0x38U
,
85 [OP_DEVICEADDR
] = 0x14U
,
86 [OP_ENDPTLISTADDR
] = 0x18U
,
91 [OP_ENDPTSETUPSTAT
] = 0x6CU
,
92 [OP_ENDPTPRIME
] = 0x70U
,
93 [OP_ENDPTFLUSH
] = 0x74U
,
94 [OP_ENDPTSTAT
] = 0x78U
,
95 [OP_ENDPTCOMPLETE
] = 0x7CU
,
96 [OP_ENDPTCTRL
] = 0x80U
,
99 static const u8 ci_regs_lpm
[] = {
100 [CAP_CAPLENGTH
] = 0x00U
,
101 [CAP_HCCPARAMS
] = 0x08U
,
102 [CAP_DCCPARAMS
] = 0x24U
,
103 [CAP_TESTMODE
] = 0xFCU
,
106 [OP_USBINTR
] = 0x08U
,
107 [OP_DEVICEADDR
] = 0x14U
,
108 [OP_ENDPTLISTADDR
] = 0x18U
,
112 [OP_USBMODE
] = 0xC8U
,
113 [OP_ENDPTSETUPSTAT
] = 0xD8U
,
114 [OP_ENDPTPRIME
] = 0xDCU
,
115 [OP_ENDPTFLUSH
] = 0xE0U
,
116 [OP_ENDPTSTAT
] = 0xE4U
,
117 [OP_ENDPTCOMPLETE
] = 0xE8U
,
118 [OP_ENDPTCTRL
] = 0xECU
,
121 static int hw_alloc_regmap(struct ci_hdrc
*ci
, bool is_lpm
)
125 for (i
= 0; i
< OP_ENDPTCTRL
; i
++)
126 ci
->hw_bank
.regmap
[i
] =
127 (i
<= CAP_LAST
? ci
->hw_bank
.cap
: ci
->hw_bank
.op
) +
128 (is_lpm
? ci_regs_lpm
[i
] : ci_regs_nolpm
[i
]);
130 for (; i
<= OP_LAST
; i
++)
131 ci
->hw_bank
.regmap
[i
] = ci
->hw_bank
.op
+
132 4 * (i
- OP_ENDPTCTRL
) +
134 ? ci_regs_lpm
[OP_ENDPTCTRL
]
135 : ci_regs_nolpm
[OP_ENDPTCTRL
]);
141 * hw_read_intr_enable: returns interrupt enable register
143 * @ci: the controller
145 * This function returns register data
147 u32
hw_read_intr_enable(struct ci_hdrc
*ci
)
149 return hw_read(ci
, OP_USBINTR
, ~0);
153 * hw_read_intr_status: returns interrupt status register
155 * @ci: the controller
157 * This function returns register data
159 u32
hw_read_intr_status(struct ci_hdrc
*ci
)
161 return hw_read(ci
, OP_USBSTS
, ~0);
165 * hw_port_test_set: writes port test mode (execute without interruption)
168 * This function returns an error code
170 int hw_port_test_set(struct ci_hdrc
*ci
, u8 mode
)
172 const u8 TEST_MODE_MAX
= 7;
174 if (mode
> TEST_MODE_MAX
)
177 hw_write(ci
, OP_PORTSC
, PORTSC_PTC
, mode
<< __ffs(PORTSC_PTC
));
182 * hw_port_test_get: reads port test mode value
184 * @ci: the controller
186 * This function returns port test mode value
188 u8
hw_port_test_get(struct ci_hdrc
*ci
)
190 return hw_read(ci
, OP_PORTSC
, PORTSC_PTC
) >> __ffs(PORTSC_PTC
);
193 static void hw_wait_phy_stable(void)
196 * The phy needs some delay to output the stable status from low
197 * power mode. And for OTGSC, the status inputs are debounced
198 * using a 1 ms time constant, so, delay 2ms for controller to get
199 * the stable status, like vbus and id when the phy leaves low power.
201 usleep_range(2000, 2500);
204 /* The PHY enters/leaves low power mode */
205 static void ci_hdrc_enter_lpm(struct ci_hdrc
*ci
, bool enable
)
207 enum ci_hw_regs reg
= ci
->hw_bank
.lpm
? OP_DEVLC
: OP_PORTSC
;
208 bool lpm
= !!(hw_read(ci
, reg
, PORTSC_PHCD(ci
->hw_bank
.lpm
)));
211 hw_write(ci
, reg
, PORTSC_PHCD(ci
->hw_bank
.lpm
),
212 PORTSC_PHCD(ci
->hw_bank
.lpm
));
213 else if (!enable
&& lpm
)
214 hw_write(ci
, reg
, PORTSC_PHCD(ci
->hw_bank
.lpm
),
218 static int hw_device_init(struct ci_hdrc
*ci
, void __iomem
*base
)
222 /* bank is a module variable */
223 ci
->hw_bank
.abs
= base
;
225 ci
->hw_bank
.cap
= ci
->hw_bank
.abs
;
226 ci
->hw_bank
.cap
+= ci
->platdata
->capoffset
;
227 ci
->hw_bank
.op
= ci
->hw_bank
.cap
+ (ioread32(ci
->hw_bank
.cap
) & 0xff);
229 hw_alloc_regmap(ci
, false);
230 reg
= hw_read(ci
, CAP_HCCPARAMS
, HCCPARAMS_LEN
) >>
231 __ffs(HCCPARAMS_LEN
);
232 ci
->hw_bank
.lpm
= reg
;
234 hw_alloc_regmap(ci
, !!reg
);
235 ci
->hw_bank
.size
= ci
->hw_bank
.op
- ci
->hw_bank
.abs
;
236 ci
->hw_bank
.size
+= OP_LAST
;
237 ci
->hw_bank
.size
/= sizeof(u32
);
239 reg
= hw_read(ci
, CAP_DCCPARAMS
, DCCPARAMS_DEN
) >>
240 __ffs(DCCPARAMS_DEN
);
241 ci
->hw_ep_max
= reg
* 2; /* cache hw ENDPT_MAX */
243 if (ci
->hw_ep_max
> ENDPT_MAX
)
246 ci_hdrc_enter_lpm(ci
, false);
248 /* Disable all interrupts bits */
249 hw_write(ci
, OP_USBINTR
, 0xffffffff, 0);
251 /* Clear all interrupts status bits*/
252 hw_write(ci
, OP_USBSTS
, 0xffffffff, 0xffffffff);
254 dev_dbg(ci
->dev
, "ChipIdea HDRC found, lpm: %d; cap: %p op: %p\n",
255 ci
->hw_bank
.lpm
, ci
->hw_bank
.cap
, ci
->hw_bank
.op
);
257 /* setup lock mode ? */
259 /* ENDPTSETUPSTAT is '0' by default */
261 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
266 static void hw_phymode_configure(struct ci_hdrc
*ci
)
268 u32 portsc
, lpm
, sts
= 0;
270 switch (ci
->platdata
->phy_mode
) {
271 case USBPHY_INTERFACE_MODE_UTMI
:
272 portsc
= PORTSC_PTS(PTS_UTMI
);
273 lpm
= DEVLC_PTS(PTS_UTMI
);
275 case USBPHY_INTERFACE_MODE_UTMIW
:
276 portsc
= PORTSC_PTS(PTS_UTMI
) | PORTSC_PTW
;
277 lpm
= DEVLC_PTS(PTS_UTMI
) | DEVLC_PTW
;
279 case USBPHY_INTERFACE_MODE_ULPI
:
280 portsc
= PORTSC_PTS(PTS_ULPI
);
281 lpm
= DEVLC_PTS(PTS_ULPI
);
283 case USBPHY_INTERFACE_MODE_SERIAL
:
284 portsc
= PORTSC_PTS(PTS_SERIAL
);
285 lpm
= DEVLC_PTS(PTS_SERIAL
);
288 case USBPHY_INTERFACE_MODE_HSIC
:
289 portsc
= PORTSC_PTS(PTS_HSIC
);
290 lpm
= DEVLC_PTS(PTS_HSIC
);
296 if (ci
->hw_bank
.lpm
) {
297 hw_write(ci
, OP_DEVLC
, DEVLC_PTS(7) | DEVLC_PTW
, lpm
);
299 hw_write(ci
, OP_DEVLC
, DEVLC_STS
, DEVLC_STS
);
301 hw_write(ci
, OP_PORTSC
, PORTSC_PTS(7) | PORTSC_PTW
, portsc
);
303 hw_write(ci
, OP_PORTSC
, PORTSC_STS
, PORTSC_STS
);
308 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
310 * @ci: the controller
312 * This function returns an error code if the phy failed to init
314 static int _ci_usb_phy_init(struct ci_hdrc
*ci
)
319 ret
= phy_init(ci
->phy
);
323 ret
= phy_power_on(ci
->phy
);
329 ret
= usb_phy_init(ci
->usb_phy
);
336 * _ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy
338 * @ci: the controller
340 static void ci_usb_phy_exit(struct ci_hdrc
*ci
)
343 phy_power_off(ci
->phy
);
346 usb_phy_shutdown(ci
->usb_phy
);
351 * ci_usb_phy_init: initialize phy according to different phy type
352 * @ci: the controller
354 * This function returns an error code if usb_phy_init has failed
356 static int ci_usb_phy_init(struct ci_hdrc
*ci
)
360 switch (ci
->platdata
->phy_mode
) {
361 case USBPHY_INTERFACE_MODE_UTMI
:
362 case USBPHY_INTERFACE_MODE_UTMIW
:
363 case USBPHY_INTERFACE_MODE_HSIC
:
364 ret
= _ci_usb_phy_init(ci
);
366 hw_wait_phy_stable();
369 hw_phymode_configure(ci
);
371 case USBPHY_INTERFACE_MODE_ULPI
:
372 case USBPHY_INTERFACE_MODE_SERIAL
:
373 hw_phymode_configure(ci
);
374 ret
= _ci_usb_phy_init(ci
);
379 ret
= _ci_usb_phy_init(ci
);
381 hw_wait_phy_stable();
388 * hw_controller_reset: do controller reset
389 * @ci: the controller
391 * This function returns an error code
393 static int hw_controller_reset(struct ci_hdrc
*ci
)
397 hw_write(ci
, OP_USBCMD
, USBCMD_RST
, USBCMD_RST
);
398 while (hw_read(ci
, OP_USBCMD
, USBCMD_RST
)) {
408 * hw_device_reset: resets chip (execute without interruption)
409 * @ci: the controller
411 * This function returns an error code
413 int hw_device_reset(struct ci_hdrc
*ci
)
417 /* should flush & stop before reset */
418 hw_write(ci
, OP_ENDPTFLUSH
, ~0, ~0);
419 hw_write(ci
, OP_USBCMD
, USBCMD_RS
, 0);
421 ret
= hw_controller_reset(ci
);
423 dev_err(ci
->dev
, "error resetting controller, ret=%d\n", ret
);
427 if (ci
->platdata
->notify_event
)
428 ci
->platdata
->notify_event(ci
,
429 CI_HDRC_CONTROLLER_RESET_EVENT
);
431 if (ci
->platdata
->flags
& CI_HDRC_DISABLE_STREAMING
)
432 hw_write(ci
, OP_USBMODE
, USBMODE_CI_SDIS
, USBMODE_CI_SDIS
);
434 if (ci
->platdata
->flags
& CI_HDRC_FORCE_FULLSPEED
) {
436 hw_write(ci
, OP_DEVLC
, DEVLC_PFSC
, DEVLC_PFSC
);
438 hw_write(ci
, OP_PORTSC
, PORTSC_PFSC
, PORTSC_PFSC
);
441 /* USBMODE should be configured step by step */
442 hw_write(ci
, OP_USBMODE
, USBMODE_CM
, USBMODE_CM_IDLE
);
443 hw_write(ci
, OP_USBMODE
, USBMODE_CM
, USBMODE_CM_DC
);
445 hw_write(ci
, OP_USBMODE
, USBMODE_SLOM
, USBMODE_SLOM
);
447 if (hw_read(ci
, OP_USBMODE
, USBMODE_CM
) != USBMODE_CM_DC
) {
448 pr_err("cannot enter in %s device mode", ci_role(ci
)->name
);
449 pr_err("lpm = %i", ci
->hw_bank
.lpm
);
457 * hw_wait_reg: wait the register value
459 * Sometimes, it needs to wait register value before going on.
460 * Eg, when switch to device mode, the vbus value should be lower
461 * than OTGSC_BSV before connects to host.
463 * @ci: the controller
464 * @reg: register index
466 * @value: the bit value to wait
467 * @timeout_ms: timeout in millisecond
469 * This function returns an error code if timeout
471 int hw_wait_reg(struct ci_hdrc
*ci
, enum ci_hw_regs reg
, u32 mask
,
472 u32 value
, unsigned int timeout_ms
)
474 unsigned long elapse
= jiffies
+ msecs_to_jiffies(timeout_ms
);
476 while (hw_read(ci
, reg
, mask
) != value
) {
477 if (time_after(jiffies
, elapse
)) {
478 dev_err(ci
->dev
, "timeout waiting for %08x in %d\n",
488 static irqreturn_t
ci_irq(int irq
, void *data
)
490 struct ci_hdrc
*ci
= data
;
491 irqreturn_t ret
= IRQ_NONE
;
495 otgsc
= hw_read_otgsc(ci
, ~0);
496 if (ci_otg_is_fsm_mode(ci
)) {
497 ret
= ci_otg_fsm_irq(ci
);
498 if (ret
== IRQ_HANDLED
)
504 * Handle id change interrupt, it indicates device/host function
507 if (ci
->is_otg
&& (otgsc
& OTGSC_IDIE
) && (otgsc
& OTGSC_IDIS
)) {
509 /* Clear ID change irq status */
510 hw_write_otgsc(ci
, OTGSC_IDIS
, OTGSC_IDIS
);
511 ci_otg_queue_work(ci
);
516 * Handle vbus change interrupt, it indicates device connection
517 * and disconnection events.
519 if (ci
->is_otg
&& (otgsc
& OTGSC_BSVIE
) && (otgsc
& OTGSC_BSVIS
)) {
520 ci
->b_sess_valid_event
= true;
522 hw_write_otgsc(ci
, OTGSC_BSVIS
, OTGSC_BSVIS
);
523 ci_otg_queue_work(ci
);
527 /* Handle device/host interrupt */
528 if (ci
->role
!= CI_ROLE_END
)
529 ret
= ci_role(ci
)->irq(ci
);
534 static int ci_get_platdata(struct device
*dev
,
535 struct ci_hdrc_platform_data
*platdata
)
537 if (!platdata
->phy_mode
)
538 platdata
->phy_mode
= of_usb_get_phy_mode(dev
->of_node
);
540 if (!platdata
->dr_mode
)
541 platdata
->dr_mode
= of_usb_get_dr_mode(dev
->of_node
);
543 if (platdata
->dr_mode
== USB_DR_MODE_UNKNOWN
)
544 platdata
->dr_mode
= USB_DR_MODE_OTG
;
546 if (platdata
->dr_mode
!= USB_DR_MODE_PERIPHERAL
) {
547 /* Get the vbus regulator */
548 platdata
->reg_vbus
= devm_regulator_get(dev
, "vbus");
549 if (PTR_ERR(platdata
->reg_vbus
) == -EPROBE_DEFER
) {
550 return -EPROBE_DEFER
;
551 } else if (PTR_ERR(platdata
->reg_vbus
) == -ENODEV
) {
552 /* no vbus regulator is needed */
553 platdata
->reg_vbus
= NULL
;
554 } else if (IS_ERR(platdata
->reg_vbus
)) {
555 dev_err(dev
, "Getting regulator error: %ld\n",
556 PTR_ERR(platdata
->reg_vbus
));
557 return PTR_ERR(platdata
->reg_vbus
);
559 /* Get TPL support */
560 if (!platdata
->tpl_support
)
561 platdata
->tpl_support
=
562 of_usb_host_tpl_support(dev
->of_node
);
565 if (of_usb_get_maximum_speed(dev
->of_node
) == USB_SPEED_FULL
)
566 platdata
->flags
|= CI_HDRC_FORCE_FULLSPEED
;
571 static DEFINE_IDA(ci_ida
);
573 struct platform_device
*ci_hdrc_add_device(struct device
*dev
,
574 struct resource
*res
, int nres
,
575 struct ci_hdrc_platform_data
*platdata
)
577 struct platform_device
*pdev
;
580 ret
= ci_get_platdata(dev
, platdata
);
584 id
= ida_simple_get(&ci_ida
, 0, 0, GFP_KERNEL
);
588 pdev
= platform_device_alloc("ci_hdrc", id
);
594 pdev
->dev
.parent
= dev
;
595 pdev
->dev
.dma_mask
= dev
->dma_mask
;
596 pdev
->dev
.dma_parms
= dev
->dma_parms
;
597 dma_set_coherent_mask(&pdev
->dev
, dev
->coherent_dma_mask
);
599 ret
= platform_device_add_resources(pdev
, res
, nres
);
603 ret
= platform_device_add_data(pdev
, platdata
, sizeof(*platdata
));
607 ret
= platform_device_add(pdev
);
614 platform_device_put(pdev
);
616 ida_simple_remove(&ci_ida
, id
);
619 EXPORT_SYMBOL_GPL(ci_hdrc_add_device
);
621 void ci_hdrc_remove_device(struct platform_device
*pdev
)
624 platform_device_unregister(pdev
);
625 ida_simple_remove(&ci_ida
, id
);
627 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device
);
629 static inline void ci_role_destroy(struct ci_hdrc
*ci
)
631 ci_hdrc_gadget_destroy(ci
);
632 ci_hdrc_host_destroy(ci
);
634 ci_hdrc_otg_destroy(ci
);
637 static void ci_get_otg_capable(struct ci_hdrc
*ci
)
639 if (ci
->platdata
->flags
& CI_HDRC_DUAL_ROLE_NOT_OTG
)
642 ci
->is_otg
= (hw_read(ci
, CAP_DCCPARAMS
,
643 DCCPARAMS_DC
| DCCPARAMS_HC
)
644 == (DCCPARAMS_DC
| DCCPARAMS_HC
));
646 dev_dbg(ci
->dev
, "It is OTG capable controller\n");
649 static int ci_hdrc_probe(struct platform_device
*pdev
)
651 struct device
*dev
= &pdev
->dev
;
653 struct resource
*res
;
656 enum usb_dr_mode dr_mode
;
658 if (!dev_get_platdata(dev
)) {
659 dev_err(dev
, "platform data missing\n");
663 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
664 base
= devm_ioremap_resource(dev
, res
);
666 return PTR_ERR(base
);
668 ci
= devm_kzalloc(dev
, sizeof(*ci
), GFP_KERNEL
);
673 ci
->platdata
= dev_get_platdata(dev
);
674 ci
->imx28_write_fix
= !!(ci
->platdata
->flags
&
675 CI_HDRC_IMX28_WRITE_FIX
);
677 ret
= hw_device_init(ci
, base
);
679 dev_err(dev
, "can't initialize hardware\n");
683 if (ci
->platdata
->phy
) {
684 ci
->phy
= ci
->platdata
->phy
;
685 } else if (ci
->platdata
->usb_phy
) {
686 ci
->usb_phy
= ci
->platdata
->usb_phy
;
688 ci
->phy
= devm_phy_get(dev
->parent
, "usb-phy");
689 ci
->usb_phy
= devm_usb_get_phy(dev
->parent
, USB_PHY_TYPE_USB2
);
691 /* if both generic PHY and USB PHY layers aren't enabled */
692 if (PTR_ERR(ci
->phy
) == -ENOSYS
&&
693 PTR_ERR(ci
->usb_phy
) == -ENXIO
)
696 if (IS_ERR(ci
->phy
) && IS_ERR(ci
->usb_phy
))
697 return -EPROBE_DEFER
;
701 else if (IS_ERR(ci
->usb_phy
))
705 ret
= ci_usb_phy_init(ci
);
707 dev_err(dev
, "unable to init phy: %d\n", ret
);
711 ci
->hw_bank
.phys
= res
->start
;
713 ci
->irq
= platform_get_irq(pdev
, 0);
715 dev_err(dev
, "missing IRQ\n");
720 ci_get_otg_capable(ci
);
722 dr_mode
= ci
->platdata
->dr_mode
;
723 /* initialize role(s) before the interrupt is requested */
724 if (dr_mode
== USB_DR_MODE_OTG
|| dr_mode
== USB_DR_MODE_HOST
) {
725 ret
= ci_hdrc_host_init(ci
);
727 dev_info(dev
, "doesn't support host\n");
730 if (dr_mode
== USB_DR_MODE_OTG
|| dr_mode
== USB_DR_MODE_PERIPHERAL
) {
731 ret
= ci_hdrc_gadget_init(ci
);
733 dev_info(dev
, "doesn't support gadget\n");
736 if (!ci
->roles
[CI_ROLE_HOST
] && !ci
->roles
[CI_ROLE_GADGET
]) {
737 dev_err(dev
, "no supported roles\n");
742 if (ci
->is_otg
&& ci
->roles
[CI_ROLE_GADGET
]) {
743 /* Disable and clear all OTG irq */
744 hw_write_otgsc(ci
, OTGSC_INT_EN_BITS
| OTGSC_INT_STATUS_BITS
,
745 OTGSC_INT_STATUS_BITS
);
746 ret
= ci_hdrc_otg_init(ci
);
748 dev_err(dev
, "init otg fails, ret = %d\n", ret
);
753 if (ci
->roles
[CI_ROLE_HOST
] && ci
->roles
[CI_ROLE_GADGET
]) {
755 ci
->role
= ci_otg_role(ci
);
756 /* Enable ID change irq */
757 hw_write_otgsc(ci
, OTGSC_IDIE
, OTGSC_IDIE
);
760 * If the controller is not OTG capable, but support
761 * role switch, the defalt role is gadget, and the
762 * user can switch it through debugfs.
764 ci
->role
= CI_ROLE_GADGET
;
767 ci
->role
= ci
->roles
[CI_ROLE_HOST
]
772 /* only update vbus status for peripheral */
773 if (ci
->role
== CI_ROLE_GADGET
)
774 ci_handle_vbus_change(ci
);
776 if (!ci_otg_is_fsm_mode(ci
)) {
777 ret
= ci_role_start(ci
, ci
->role
);
779 dev_err(dev
, "can't start %s role\n",
785 platform_set_drvdata(pdev
, ci
);
786 ret
= devm_request_irq(dev
, ci
->irq
, ci_irq
, IRQF_SHARED
,
787 ci
->platdata
->name
, ci
);
791 if (ci_otg_is_fsm_mode(ci
))
792 ci_hdrc_otg_fsm_start(ci
);
794 ret
= dbg_create_files(ci
);
806 static int ci_hdrc_remove(struct platform_device
*pdev
)
808 struct ci_hdrc
*ci
= platform_get_drvdata(pdev
);
810 dbg_remove_files(ci
);
812 ci_hdrc_enter_lpm(ci
, true);
818 #ifdef CONFIG_PM_SLEEP
819 static void ci_controller_suspend(struct ci_hdrc
*ci
)
821 ci_hdrc_enter_lpm(ci
, true);
824 usb_phy_set_suspend(ci
->usb_phy
, 1);
827 static int ci_controller_resume(struct device
*dev
)
829 struct ci_hdrc
*ci
= dev_get_drvdata(dev
);
831 dev_dbg(dev
, "at %s\n", __func__
);
833 ci_hdrc_enter_lpm(ci
, false);
836 usb_phy_set_suspend(ci
->usb_phy
, 0);
837 usb_phy_set_wakeup(ci
->usb_phy
, false);
838 hw_wait_phy_stable();
844 static int ci_suspend(struct device
*dev
)
846 struct ci_hdrc
*ci
= dev_get_drvdata(dev
);
849 flush_workqueue(ci
->wq
);
851 ci_controller_suspend(ci
);
856 static int ci_resume(struct device
*dev
)
858 return ci_controller_resume(dev
);
860 #endif /* CONFIG_PM_SLEEP */
862 static const struct dev_pm_ops ci_pm_ops
= {
863 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend
, ci_resume
)
865 static struct platform_driver ci_hdrc_driver
= {
866 .probe
= ci_hdrc_probe
,
867 .remove
= ci_hdrc_remove
,
874 module_platform_driver(ci_hdrc_driver
);
876 MODULE_ALIAS("platform:ci_hdrc");
877 MODULE_LICENSE("GPL v2");
878 MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
879 MODULE_DESCRIPTION("ChipIdea HDRC Driver");