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/platform_device.h>
51 #include <linux/module.h>
52 #include <linux/idr.h>
53 #include <linux/interrupt.h>
55 #include <linux/kernel.h>
56 #include <linux/slab.h>
57 #include <linux/pm_runtime.h>
58 #include <linux/usb/ch9.h>
59 #include <linux/usb/gadget.h>
60 #include <linux/usb/otg.h>
61 #include <linux/usb/chipidea.h>
62 #include <linux/usb/of.h>
64 #include <linux/phy.h>
65 #include <linux/regulator/consumer.h>
75 /* Controller register map */
76 static const u8 ci_regs_nolpm
[] = {
77 [CAP_CAPLENGTH
] = 0x00U
,
78 [CAP_HCCPARAMS
] = 0x08U
,
79 [CAP_DCCPARAMS
] = 0x24U
,
80 [CAP_TESTMODE
] = 0x38U
,
84 [OP_DEVICEADDR
] = 0x14U
,
85 [OP_ENDPTLISTADDR
] = 0x18U
,
90 [OP_ENDPTSETUPSTAT
] = 0x6CU
,
91 [OP_ENDPTPRIME
] = 0x70U
,
92 [OP_ENDPTFLUSH
] = 0x74U
,
93 [OP_ENDPTSTAT
] = 0x78U
,
94 [OP_ENDPTCOMPLETE
] = 0x7CU
,
95 [OP_ENDPTCTRL
] = 0x80U
,
98 static const u8 ci_regs_lpm
[] = {
99 [CAP_CAPLENGTH
] = 0x00U
,
100 [CAP_HCCPARAMS
] = 0x08U
,
101 [CAP_DCCPARAMS
] = 0x24U
,
102 [CAP_TESTMODE
] = 0xFCU
,
105 [OP_USBINTR
] = 0x08U
,
106 [OP_DEVICEADDR
] = 0x14U
,
107 [OP_ENDPTLISTADDR
] = 0x18U
,
111 [OP_USBMODE
] = 0xC8U
,
112 [OP_ENDPTSETUPSTAT
] = 0xD8U
,
113 [OP_ENDPTPRIME
] = 0xDCU
,
114 [OP_ENDPTFLUSH
] = 0xE0U
,
115 [OP_ENDPTSTAT
] = 0xE4U
,
116 [OP_ENDPTCOMPLETE
] = 0xE8U
,
117 [OP_ENDPTCTRL
] = 0xECU
,
120 static int hw_alloc_regmap(struct ci_hdrc
*ci
, bool is_lpm
)
124 for (i
= 0; i
< OP_ENDPTCTRL
; i
++)
125 ci
->hw_bank
.regmap
[i
] =
126 (i
<= CAP_LAST
? ci
->hw_bank
.cap
: ci
->hw_bank
.op
) +
127 (is_lpm
? ci_regs_lpm
[i
] : ci_regs_nolpm
[i
]);
129 for (; i
<= OP_LAST
; i
++)
130 ci
->hw_bank
.regmap
[i
] = ci
->hw_bank
.op
+
131 4 * (i
- OP_ENDPTCTRL
) +
133 ? ci_regs_lpm
[OP_ENDPTCTRL
]
134 : ci_regs_nolpm
[OP_ENDPTCTRL
]);
140 * hw_read_intr_enable: returns interrupt enable register
142 * @ci: the controller
144 * This function returns register data
146 u32
hw_read_intr_enable(struct ci_hdrc
*ci
)
148 return hw_read(ci
, OP_USBINTR
, ~0);
152 * hw_read_intr_status: returns interrupt status register
154 * @ci: the controller
156 * This function returns register data
158 u32
hw_read_intr_status(struct ci_hdrc
*ci
)
160 return hw_read(ci
, OP_USBSTS
, ~0);
164 * hw_port_test_set: writes port test mode (execute without interruption)
167 * This function returns an error code
169 int hw_port_test_set(struct ci_hdrc
*ci
, u8 mode
)
171 const u8 TEST_MODE_MAX
= 7;
173 if (mode
> TEST_MODE_MAX
)
176 hw_write(ci
, OP_PORTSC
, PORTSC_PTC
, mode
<< __ffs(PORTSC_PTC
));
181 * hw_port_test_get: reads port test mode value
183 * @ci: the controller
185 * This function returns port test mode value
187 u8
hw_port_test_get(struct ci_hdrc
*ci
)
189 return hw_read(ci
, OP_PORTSC
, PORTSC_PTC
) >> __ffs(PORTSC_PTC
);
192 /* The PHY enters/leaves low power mode */
193 static void ci_hdrc_enter_lpm(struct ci_hdrc
*ci
, bool enable
)
195 enum ci_hw_regs reg
= ci
->hw_bank
.lpm
? OP_DEVLC
: OP_PORTSC
;
196 bool lpm
= !!(hw_read(ci
, reg
, PORTSC_PHCD(ci
->hw_bank
.lpm
)));
198 if (enable
&& !lpm
) {
199 hw_write(ci
, reg
, PORTSC_PHCD(ci
->hw_bank
.lpm
),
200 PORTSC_PHCD(ci
->hw_bank
.lpm
));
201 } else if (!enable
&& lpm
) {
202 hw_write(ci
, reg
, PORTSC_PHCD(ci
->hw_bank
.lpm
),
205 * the PHY needs some time (less
206 * than 1ms) to leave low power mode.
208 usleep_range(1000, 1100);
212 static int hw_device_init(struct ci_hdrc
*ci
, void __iomem
*base
)
216 /* bank is a module variable */
217 ci
->hw_bank
.abs
= base
;
219 ci
->hw_bank
.cap
= ci
->hw_bank
.abs
;
220 ci
->hw_bank
.cap
+= ci
->platdata
->capoffset
;
221 ci
->hw_bank
.op
= ci
->hw_bank
.cap
+ (ioread32(ci
->hw_bank
.cap
) & 0xff);
223 hw_alloc_regmap(ci
, false);
224 reg
= hw_read(ci
, CAP_HCCPARAMS
, HCCPARAMS_LEN
) >>
225 __ffs(HCCPARAMS_LEN
);
226 ci
->hw_bank
.lpm
= reg
;
228 hw_alloc_regmap(ci
, !!reg
);
229 ci
->hw_bank
.size
= ci
->hw_bank
.op
- ci
->hw_bank
.abs
;
230 ci
->hw_bank
.size
+= OP_LAST
;
231 ci
->hw_bank
.size
/= sizeof(u32
);
233 reg
= hw_read(ci
, CAP_DCCPARAMS
, DCCPARAMS_DEN
) >>
234 __ffs(DCCPARAMS_DEN
);
235 ci
->hw_ep_max
= reg
* 2; /* cache hw ENDPT_MAX */
237 if (ci
->hw_ep_max
> ENDPT_MAX
)
240 ci_hdrc_enter_lpm(ci
, false);
242 /* Disable all interrupts bits */
243 hw_write(ci
, OP_USBINTR
, 0xffffffff, 0);
245 /* Clear all interrupts status bits*/
246 hw_write(ci
, OP_USBSTS
, 0xffffffff, 0xffffffff);
248 dev_dbg(ci
->dev
, "ChipIdea HDRC found, lpm: %d; cap: %p op: %p\n",
249 ci
->hw_bank
.lpm
, ci
->hw_bank
.cap
, ci
->hw_bank
.op
);
251 /* setup lock mode ? */
253 /* ENDPTSETUPSTAT is '0' by default */
255 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
260 static void hw_phymode_configure(struct ci_hdrc
*ci
)
262 u32 portsc
, lpm
, sts
= 0;
264 switch (ci
->platdata
->phy_mode
) {
265 case USBPHY_INTERFACE_MODE_UTMI
:
266 portsc
= PORTSC_PTS(PTS_UTMI
);
267 lpm
= DEVLC_PTS(PTS_UTMI
);
269 case USBPHY_INTERFACE_MODE_UTMIW
:
270 portsc
= PORTSC_PTS(PTS_UTMI
) | PORTSC_PTW
;
271 lpm
= DEVLC_PTS(PTS_UTMI
) | DEVLC_PTW
;
273 case USBPHY_INTERFACE_MODE_ULPI
:
274 portsc
= PORTSC_PTS(PTS_ULPI
);
275 lpm
= DEVLC_PTS(PTS_ULPI
);
277 case USBPHY_INTERFACE_MODE_SERIAL
:
278 portsc
= PORTSC_PTS(PTS_SERIAL
);
279 lpm
= DEVLC_PTS(PTS_SERIAL
);
282 case USBPHY_INTERFACE_MODE_HSIC
:
283 portsc
= PORTSC_PTS(PTS_HSIC
);
284 lpm
= DEVLC_PTS(PTS_HSIC
);
290 if (ci
->hw_bank
.lpm
) {
291 hw_write(ci
, OP_DEVLC
, DEVLC_PTS(7) | DEVLC_PTW
, lpm
);
293 hw_write(ci
, OP_DEVLC
, DEVLC_STS
, DEVLC_STS
);
295 hw_write(ci
, OP_PORTSC
, PORTSC_PTS(7) | PORTSC_PTW
, portsc
);
297 hw_write(ci
, OP_PORTSC
, PORTSC_STS
, PORTSC_STS
);
302 * ci_usb_phy_init: initialize phy according to different phy type
303 * @ci: the controller
305 * This function returns an error code if usb_phy_init has failed
307 static int ci_usb_phy_init(struct ci_hdrc
*ci
)
311 switch (ci
->platdata
->phy_mode
) {
312 case USBPHY_INTERFACE_MODE_UTMI
:
313 case USBPHY_INTERFACE_MODE_UTMIW
:
314 case USBPHY_INTERFACE_MODE_HSIC
:
315 ret
= usb_phy_init(ci
->transceiver
);
318 hw_phymode_configure(ci
);
320 case USBPHY_INTERFACE_MODE_ULPI
:
321 case USBPHY_INTERFACE_MODE_SERIAL
:
322 hw_phymode_configure(ci
);
323 ret
= usb_phy_init(ci
->transceiver
);
328 ret
= usb_phy_init(ci
->transceiver
);
335 * hw_device_reset: resets chip (execute without interruption)
336 * @ci: the controller
338 * This function returns an error code
340 int hw_device_reset(struct ci_hdrc
*ci
, u32 mode
)
342 /* should flush & stop before reset */
343 hw_write(ci
, OP_ENDPTFLUSH
, ~0, ~0);
344 hw_write(ci
, OP_USBCMD
, USBCMD_RS
, 0);
346 hw_write(ci
, OP_USBCMD
, USBCMD_RST
, USBCMD_RST
);
347 while (hw_read(ci
, OP_USBCMD
, USBCMD_RST
))
348 udelay(10); /* not RTOS friendly */
350 if (ci
->platdata
->notify_event
)
351 ci
->platdata
->notify_event(ci
,
352 CI_HDRC_CONTROLLER_RESET_EVENT
);
354 if (ci
->platdata
->flags
& CI_HDRC_DISABLE_STREAMING
)
355 hw_write(ci
, OP_USBMODE
, USBMODE_CI_SDIS
, USBMODE_CI_SDIS
);
357 if (ci
->platdata
->flags
& CI_HDRC_FORCE_FULLSPEED
) {
359 hw_write(ci
, OP_DEVLC
, DEVLC_PFSC
, DEVLC_PFSC
);
361 hw_write(ci
, OP_PORTSC
, PORTSC_PFSC
, PORTSC_PFSC
);
364 /* USBMODE should be configured step by step */
365 hw_write(ci
, OP_USBMODE
, USBMODE_CM
, USBMODE_CM_IDLE
);
366 hw_write(ci
, OP_USBMODE
, USBMODE_CM
, mode
);
368 hw_write(ci
, OP_USBMODE
, USBMODE_SLOM
, USBMODE_SLOM
);
370 if (hw_read(ci
, OP_USBMODE
, USBMODE_CM
) != mode
) {
371 pr_err("cannot enter in %s mode", ci_role(ci
)->name
);
372 pr_err("lpm = %i", ci
->hw_bank
.lpm
);
380 * hw_wait_reg: wait the register value
382 * Sometimes, it needs to wait register value before going on.
383 * Eg, when switch to device mode, the vbus value should be lower
384 * than OTGSC_BSV before connects to host.
386 * @ci: the controller
387 * @reg: register index
389 * @value: the bit value to wait
390 * @timeout_ms: timeout in millisecond
392 * This function returns an error code if timeout
394 int hw_wait_reg(struct ci_hdrc
*ci
, enum ci_hw_regs reg
, u32 mask
,
395 u32 value
, unsigned int timeout_ms
)
397 unsigned long elapse
= jiffies
+ msecs_to_jiffies(timeout_ms
);
399 while (hw_read(ci
, reg
, mask
) != value
) {
400 if (time_after(jiffies
, elapse
)) {
401 dev_err(ci
->dev
, "timeout waiting for %08x in %d\n",
411 static irqreturn_t
ci_irq(int irq
, void *data
)
413 struct ci_hdrc
*ci
= data
;
414 irqreturn_t ret
= IRQ_NONE
;
418 otgsc
= hw_read_otgsc(ci
, ~0);
419 if (ci_otg_is_fsm_mode(ci
)) {
420 ret
= ci_otg_fsm_irq(ci
);
421 if (ret
== IRQ_HANDLED
)
427 * Handle id change interrupt, it indicates device/host function
430 if (ci
->is_otg
&& (otgsc
& OTGSC_IDIE
) && (otgsc
& OTGSC_IDIS
)) {
432 /* Clear ID change irq status */
433 hw_write_otgsc(ci
, OTGSC_IDIS
, OTGSC_IDIS
);
434 ci_otg_queue_work(ci
);
439 * Handle vbus change interrupt, it indicates device connection
440 * and disconnection events.
442 if (ci
->is_otg
&& (otgsc
& OTGSC_BSVIE
) && (otgsc
& OTGSC_BSVIS
)) {
443 ci
->b_sess_valid_event
= true;
445 hw_write_otgsc(ci
, OTGSC_BSVIS
, OTGSC_BSVIS
);
446 ci_otg_queue_work(ci
);
450 /* Handle device/host interrupt */
451 if (ci
->role
!= CI_ROLE_END
)
452 ret
= ci_role(ci
)->irq(ci
);
457 static int ci_get_platdata(struct device
*dev
,
458 struct ci_hdrc_platform_data
*platdata
)
460 if (!platdata
->phy_mode
)
461 platdata
->phy_mode
= of_usb_get_phy_mode(dev
->of_node
);
463 if (!platdata
->dr_mode
)
464 platdata
->dr_mode
= of_usb_get_dr_mode(dev
->of_node
);
466 if (platdata
->dr_mode
== USB_DR_MODE_UNKNOWN
)
467 platdata
->dr_mode
= USB_DR_MODE_OTG
;
469 if (platdata
->dr_mode
!= USB_DR_MODE_PERIPHERAL
) {
470 /* Get the vbus regulator */
471 platdata
->reg_vbus
= devm_regulator_get(dev
, "vbus");
472 if (PTR_ERR(platdata
->reg_vbus
) == -EPROBE_DEFER
) {
473 return -EPROBE_DEFER
;
474 } else if (PTR_ERR(platdata
->reg_vbus
) == -ENODEV
) {
475 /* no vbus regualator is needed */
476 platdata
->reg_vbus
= NULL
;
477 } else if (IS_ERR(platdata
->reg_vbus
)) {
478 dev_err(dev
, "Getting regulator error: %ld\n",
479 PTR_ERR(platdata
->reg_vbus
));
480 return PTR_ERR(platdata
->reg_vbus
);
482 /* Get TPL support */
483 if (!platdata
->tpl_support
)
484 platdata
->tpl_support
=
485 of_usb_host_tpl_support(dev
->of_node
);
488 if (of_usb_get_maximum_speed(dev
->of_node
) == USB_SPEED_FULL
)
489 platdata
->flags
|= CI_HDRC_FORCE_FULLSPEED
;
494 static DEFINE_IDA(ci_ida
);
496 struct platform_device
*ci_hdrc_add_device(struct device
*dev
,
497 struct resource
*res
, int nres
,
498 struct ci_hdrc_platform_data
*platdata
)
500 struct platform_device
*pdev
;
503 ret
= ci_get_platdata(dev
, platdata
);
507 id
= ida_simple_get(&ci_ida
, 0, 0, GFP_KERNEL
);
511 pdev
= platform_device_alloc("ci_hdrc", id
);
517 pdev
->dev
.parent
= dev
;
518 pdev
->dev
.dma_mask
= dev
->dma_mask
;
519 pdev
->dev
.dma_parms
= dev
->dma_parms
;
520 dma_set_coherent_mask(&pdev
->dev
, dev
->coherent_dma_mask
);
522 ret
= platform_device_add_resources(pdev
, res
, nres
);
526 ret
= platform_device_add_data(pdev
, platdata
, sizeof(*platdata
));
530 ret
= platform_device_add(pdev
);
537 platform_device_put(pdev
);
539 ida_simple_remove(&ci_ida
, id
);
542 EXPORT_SYMBOL_GPL(ci_hdrc_add_device
);
544 void ci_hdrc_remove_device(struct platform_device
*pdev
)
547 platform_device_unregister(pdev
);
548 ida_simple_remove(&ci_ida
, id
);
550 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device
);
552 static inline void ci_role_destroy(struct ci_hdrc
*ci
)
554 ci_hdrc_gadget_destroy(ci
);
555 ci_hdrc_host_destroy(ci
);
557 ci_hdrc_otg_destroy(ci
);
560 static void ci_get_otg_capable(struct ci_hdrc
*ci
)
562 if (ci
->platdata
->flags
& CI_HDRC_DUAL_ROLE_NOT_OTG
)
565 ci
->is_otg
= (hw_read(ci
, CAP_DCCPARAMS
,
566 DCCPARAMS_DC
| DCCPARAMS_HC
)
567 == (DCCPARAMS_DC
| DCCPARAMS_HC
));
569 dev_dbg(ci
->dev
, "It is OTG capable controller\n");
572 static int ci_hdrc_probe(struct platform_device
*pdev
)
574 struct device
*dev
= &pdev
->dev
;
576 struct resource
*res
;
579 enum usb_dr_mode dr_mode
;
581 if (!dev_get_platdata(dev
)) {
582 dev_err(dev
, "platform data missing\n");
586 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
587 base
= devm_ioremap_resource(dev
, res
);
589 return PTR_ERR(base
);
591 ci
= devm_kzalloc(dev
, sizeof(*ci
), GFP_KERNEL
);
593 dev_err(dev
, "can't allocate device\n");
598 ci
->platdata
= dev_get_platdata(dev
);
599 ci
->imx28_write_fix
= !!(ci
->platdata
->flags
&
600 CI_HDRC_IMX28_WRITE_FIX
);
602 ret
= hw_device_init(ci
, base
);
604 dev_err(dev
, "can't initialize hardware\n");
608 if (ci
->platdata
->phy
)
609 ci
->transceiver
= ci
->platdata
->phy
;
611 ci
->transceiver
= devm_usb_get_phy(dev
, USB_PHY_TYPE_USB2
);
613 if (IS_ERR(ci
->transceiver
)) {
614 ret
= PTR_ERR(ci
->transceiver
);
616 * if -ENXIO is returned, it means PHY layer wasn't
617 * enabled, so it makes no sense to return -EPROBE_DEFER
618 * in that case, since no PHY driver will ever probe.
623 dev_err(dev
, "no usb2 phy configured\n");
624 return -EPROBE_DEFER
;
627 ret
= ci_usb_phy_init(ci
);
629 dev_err(dev
, "unable to init phy: %d\n", ret
);
633 * The delay to sync PHY's status, the maximum delay is
634 * 2ms since the otgsc uses 1ms timer to debounce the
637 usleep_range(2000, 2500);
640 ci
->hw_bank
.phys
= res
->start
;
642 ci
->irq
= platform_get_irq(pdev
, 0);
644 dev_err(dev
, "missing IRQ\n");
649 ci_get_otg_capable(ci
);
651 dr_mode
= ci
->platdata
->dr_mode
;
652 /* initialize role(s) before the interrupt is requested */
653 if (dr_mode
== USB_DR_MODE_OTG
|| dr_mode
== USB_DR_MODE_HOST
) {
654 ret
= ci_hdrc_host_init(ci
);
656 dev_info(dev
, "doesn't support host\n");
659 if (dr_mode
== USB_DR_MODE_OTG
|| dr_mode
== USB_DR_MODE_PERIPHERAL
) {
660 ret
= ci_hdrc_gadget_init(ci
);
662 dev_info(dev
, "doesn't support gadget\n");
665 if (!ci
->roles
[CI_ROLE_HOST
] && !ci
->roles
[CI_ROLE_GADGET
]) {
666 dev_err(dev
, "no supported roles\n");
671 if (ci
->is_otg
&& ci
->roles
[CI_ROLE_GADGET
]) {
672 /* Disable and clear all OTG irq */
673 hw_write_otgsc(ci
, OTGSC_INT_EN_BITS
| OTGSC_INT_STATUS_BITS
,
674 OTGSC_INT_STATUS_BITS
);
675 ret
= ci_hdrc_otg_init(ci
);
677 dev_err(dev
, "init otg fails, ret = %d\n", ret
);
682 if (ci
->roles
[CI_ROLE_HOST
] && ci
->roles
[CI_ROLE_GADGET
]) {
684 ci
->role
= ci_otg_role(ci
);
685 /* Enable ID change irq */
686 hw_write_otgsc(ci
, OTGSC_IDIE
, OTGSC_IDIE
);
689 * If the controller is not OTG capable, but support
690 * role switch, the defalt role is gadget, and the
691 * user can switch it through debugfs.
693 ci
->role
= CI_ROLE_GADGET
;
696 ci
->role
= ci
->roles
[CI_ROLE_HOST
]
701 /* only update vbus status for peripheral */
702 if (ci
->role
== CI_ROLE_GADGET
)
703 ci_handle_vbus_change(ci
);
705 if (!ci_otg_is_fsm_mode(ci
)) {
706 ret
= ci_role_start(ci
, ci
->role
);
708 dev_err(dev
, "can't start %s role\n",
714 platform_set_drvdata(pdev
, ci
);
715 ret
= request_irq(ci
->irq
, ci_irq
, IRQF_SHARED
, ci
->platdata
->name
,
720 if (ci_otg_is_fsm_mode(ci
))
721 ci_hdrc_otg_fsm_start(ci
);
723 ret
= dbg_create_files(ci
);
727 free_irq(ci
->irq
, ci
);
731 usb_phy_shutdown(ci
->transceiver
);
736 static int ci_hdrc_remove(struct platform_device
*pdev
)
738 struct ci_hdrc
*ci
= platform_get_drvdata(pdev
);
740 dbg_remove_files(ci
);
741 free_irq(ci
->irq
, ci
);
743 ci_hdrc_enter_lpm(ci
, true);
744 usb_phy_shutdown(ci
->transceiver
);
745 kfree(ci
->hw_bank
.regmap
);
750 static struct platform_driver ci_hdrc_driver
= {
751 .probe
= ci_hdrc_probe
,
752 .remove
= ci_hdrc_remove
,
755 .owner
= THIS_MODULE
,
759 module_platform_driver(ci_hdrc_driver
);
761 MODULE_ALIAS("platform:ci_hdrc");
762 MODULE_LICENSE("GPL v2");
763 MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
764 MODULE_DESCRIPTION("ChipIdea HDRC Driver");