2 * core.c - DesignWare USB3 DRD Controller Core file
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 of
11 * the License as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <linux/version.h>
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/slab.h>
26 #include <linux/spinlock.h>
27 #include <linux/platform_device.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/interrupt.h>
30 #include <linux/ioport.h>
32 #include <linux/list.h>
33 #include <linux/delay.h>
34 #include <linux/dma-mapping.h>
36 #include <linux/acpi.h>
38 #include <linux/usb/ch9.h>
39 #include <linux/usb/gadget.h>
40 #include <linux/usb/of.h>
41 #include <linux/usb/otg.h>
43 #include "platform_data.h"
50 /* -------------------------------------------------------------------------- */
52 void dwc3_set_mode(struct dwc3
*dwc
, u32 mode
)
56 reg
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
57 reg
&= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG
));
58 reg
|= DWC3_GCTL_PRTCAPDIR(mode
);
59 dwc3_writel(dwc
->regs
, DWC3_GCTL
, reg
);
63 * dwc3_core_soft_reset - Issues core soft reset and PHY reset
64 * @dwc: pointer to our context structure
66 static int dwc3_core_soft_reset(struct dwc3
*dwc
)
71 /* Before Resetting PHY, put Core in Reset */
72 reg
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
73 reg
|= DWC3_GCTL_CORESOFTRESET
;
74 dwc3_writel(dwc
->regs
, DWC3_GCTL
, reg
);
76 /* Assert USB3 PHY reset */
77 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB3PIPECTL(0));
78 reg
|= DWC3_GUSB3PIPECTL_PHYSOFTRST
;
79 dwc3_writel(dwc
->regs
, DWC3_GUSB3PIPECTL(0), reg
);
81 /* Assert USB2 PHY reset */
82 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB2PHYCFG(0));
83 reg
|= DWC3_GUSB2PHYCFG_PHYSOFTRST
;
84 dwc3_writel(dwc
->regs
, DWC3_GUSB2PHYCFG(0), reg
);
86 usb_phy_init(dwc
->usb2_phy
);
87 usb_phy_init(dwc
->usb3_phy
);
88 ret
= phy_init(dwc
->usb2_generic_phy
);
92 ret
= phy_init(dwc
->usb3_generic_phy
);
94 phy_exit(dwc
->usb2_generic_phy
);
99 /* Clear USB3 PHY reset */
100 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB3PIPECTL(0));
101 reg
&= ~DWC3_GUSB3PIPECTL_PHYSOFTRST
;
102 dwc3_writel(dwc
->regs
, DWC3_GUSB3PIPECTL(0), reg
);
104 /* Clear USB2 PHY reset */
105 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB2PHYCFG(0));
106 reg
&= ~DWC3_GUSB2PHYCFG_PHYSOFTRST
;
107 dwc3_writel(dwc
->regs
, DWC3_GUSB2PHYCFG(0), reg
);
111 /* After PHYs are stable we can take Core out of reset state */
112 reg
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
113 reg
&= ~DWC3_GCTL_CORESOFTRESET
;
114 dwc3_writel(dwc
->regs
, DWC3_GCTL
, reg
);
120 * dwc3_free_one_event_buffer - Frees one event buffer
121 * @dwc: Pointer to our controller context structure
122 * @evt: Pointer to event buffer to be freed
124 static void dwc3_free_one_event_buffer(struct dwc3
*dwc
,
125 struct dwc3_event_buffer
*evt
)
127 dma_free_coherent(dwc
->dev
, evt
->length
, evt
->buf
, evt
->dma
);
131 * dwc3_alloc_one_event_buffer - Allocates one event buffer structure
132 * @dwc: Pointer to our controller context structure
133 * @length: size of the event buffer
135 * Returns a pointer to the allocated event buffer structure on success
136 * otherwise ERR_PTR(errno).
138 static struct dwc3_event_buffer
*dwc3_alloc_one_event_buffer(struct dwc3
*dwc
,
141 struct dwc3_event_buffer
*evt
;
143 evt
= devm_kzalloc(dwc
->dev
, sizeof(*evt
), GFP_KERNEL
);
145 return ERR_PTR(-ENOMEM
);
148 evt
->length
= length
;
149 evt
->buf
= dma_alloc_coherent(dwc
->dev
, length
,
150 &evt
->dma
, GFP_KERNEL
);
152 return ERR_PTR(-ENOMEM
);
158 * dwc3_free_event_buffers - frees all allocated event buffers
159 * @dwc: Pointer to our controller context structure
161 static void dwc3_free_event_buffers(struct dwc3
*dwc
)
163 struct dwc3_event_buffer
*evt
;
166 for (i
= 0; i
< dwc
->num_event_buffers
; i
++) {
167 evt
= dwc
->ev_buffs
[i
];
169 dwc3_free_one_event_buffer(dwc
, evt
);
174 * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
175 * @dwc: pointer to our controller context structure
176 * @length: size of event buffer
178 * Returns 0 on success otherwise negative errno. In the error case, dwc
179 * may contain some buffers allocated but not all which were requested.
181 static int dwc3_alloc_event_buffers(struct dwc3
*dwc
, unsigned length
)
186 num
= DWC3_NUM_INT(dwc
->hwparams
.hwparams1
);
187 dwc
->num_event_buffers
= num
;
189 dwc
->ev_buffs
= devm_kzalloc(dwc
->dev
, sizeof(*dwc
->ev_buffs
) * num
,
194 for (i
= 0; i
< num
; i
++) {
195 struct dwc3_event_buffer
*evt
;
197 evt
= dwc3_alloc_one_event_buffer(dwc
, length
);
199 dev_err(dwc
->dev
, "can't allocate event buffer\n");
202 dwc
->ev_buffs
[i
] = evt
;
209 * dwc3_event_buffers_setup - setup our allocated event buffers
210 * @dwc: pointer to our controller context structure
212 * Returns 0 on success otherwise negative errno.
214 static int dwc3_event_buffers_setup(struct dwc3
*dwc
)
216 struct dwc3_event_buffer
*evt
;
219 for (n
= 0; n
< dwc
->num_event_buffers
; n
++) {
220 evt
= dwc
->ev_buffs
[n
];
221 dev_dbg(dwc
->dev
, "Event buf %p dma %08llx length %d\n",
222 evt
->buf
, (unsigned long long) evt
->dma
,
227 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRLO(n
),
228 lower_32_bits(evt
->dma
));
229 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRHI(n
),
230 upper_32_bits(evt
->dma
));
231 dwc3_writel(dwc
->regs
, DWC3_GEVNTSIZ(n
),
232 DWC3_GEVNTSIZ_SIZE(evt
->length
));
233 dwc3_writel(dwc
->regs
, DWC3_GEVNTCOUNT(n
), 0);
239 static void dwc3_event_buffers_cleanup(struct dwc3
*dwc
)
241 struct dwc3_event_buffer
*evt
;
244 for (n
= 0; n
< dwc
->num_event_buffers
; n
++) {
245 evt
= dwc
->ev_buffs
[n
];
249 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRLO(n
), 0);
250 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRHI(n
), 0);
251 dwc3_writel(dwc
->regs
, DWC3_GEVNTSIZ(n
), DWC3_GEVNTSIZ_INTMASK
252 | DWC3_GEVNTSIZ_SIZE(0));
253 dwc3_writel(dwc
->regs
, DWC3_GEVNTCOUNT(n
), 0);
257 static int dwc3_alloc_scratch_buffers(struct dwc3
*dwc
)
259 if (!dwc
->has_hibernation
)
262 if (!dwc
->nr_scratch
)
265 dwc
->scratchbuf
= kmalloc_array(dwc
->nr_scratch
,
266 DWC3_SCRATCHBUF_SIZE
, GFP_KERNEL
);
267 if (!dwc
->scratchbuf
)
273 static int dwc3_setup_scratch_buffers(struct dwc3
*dwc
)
275 dma_addr_t scratch_addr
;
279 if (!dwc
->has_hibernation
)
282 if (!dwc
->nr_scratch
)
285 /* should never fall here */
286 if (!WARN_ON(dwc
->scratchbuf
))
289 scratch_addr
= dma_map_single(dwc
->dev
, dwc
->scratchbuf
,
290 dwc
->nr_scratch
* DWC3_SCRATCHBUF_SIZE
,
292 if (dma_mapping_error(dwc
->dev
, scratch_addr
)) {
293 dev_err(dwc
->dev
, "failed to map scratch buffer\n");
298 dwc
->scratch_addr
= scratch_addr
;
300 param
= lower_32_bits(scratch_addr
);
302 ret
= dwc3_send_gadget_generic_command(dwc
,
303 DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO
, param
);
307 param
= upper_32_bits(scratch_addr
);
309 ret
= dwc3_send_gadget_generic_command(dwc
,
310 DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI
, param
);
317 dma_unmap_single(dwc
->dev
, dwc
->scratch_addr
, dwc
->nr_scratch
*
318 DWC3_SCRATCHBUF_SIZE
, DMA_BIDIRECTIONAL
);
324 static void dwc3_free_scratch_buffers(struct dwc3
*dwc
)
326 if (!dwc
->has_hibernation
)
329 if (!dwc
->nr_scratch
)
332 /* should never fall here */
333 if (!WARN_ON(dwc
->scratchbuf
))
336 dma_unmap_single(dwc
->dev
, dwc
->scratch_addr
, dwc
->nr_scratch
*
337 DWC3_SCRATCHBUF_SIZE
, DMA_BIDIRECTIONAL
);
338 kfree(dwc
->scratchbuf
);
341 static void dwc3_core_num_eps(struct dwc3
*dwc
)
343 struct dwc3_hwparams
*parms
= &dwc
->hwparams
;
345 dwc
->num_in_eps
= DWC3_NUM_IN_EPS(parms
);
346 dwc
->num_out_eps
= DWC3_NUM_EPS(parms
) - dwc
->num_in_eps
;
348 dwc3_trace(trace_dwc3_core
, "found %d IN and %d OUT endpoints",
349 dwc
->num_in_eps
, dwc
->num_out_eps
);
352 static void dwc3_cache_hwparams(struct dwc3
*dwc
)
354 struct dwc3_hwparams
*parms
= &dwc
->hwparams
;
356 parms
->hwparams0
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS0
);
357 parms
->hwparams1
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS1
);
358 parms
->hwparams2
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS2
);
359 parms
->hwparams3
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS3
);
360 parms
->hwparams4
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS4
);
361 parms
->hwparams5
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS5
);
362 parms
->hwparams6
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS6
);
363 parms
->hwparams7
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS7
);
364 parms
->hwparams8
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS8
);
368 * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
369 * @dwc: Pointer to our controller context structure
371 static void dwc3_phy_setup(struct dwc3
*dwc
)
375 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB3PIPECTL(0));
378 * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
379 * to '0' during coreConsultant configuration. So default value
380 * will be '0' when the core is reset. Application needs to set it
381 * to '1' after the core initialization is completed.
383 if (dwc
->revision
> DWC3_REVISION_194A
)
384 reg
|= DWC3_GUSB3PIPECTL_SUSPHY
;
386 if (dwc
->u2ss_inp3_quirk
)
387 reg
|= DWC3_GUSB3PIPECTL_U2SSINP3OK
;
389 if (dwc
->req_p1p2p3_quirk
)
390 reg
|= DWC3_GUSB3PIPECTL_REQP1P2P3
;
392 if (dwc
->del_p1p2p3_quirk
)
393 reg
|= DWC3_GUSB3PIPECTL_DEP1P2P3_EN
;
395 if (dwc
->del_phy_power_chg_quirk
)
396 reg
|= DWC3_GUSB3PIPECTL_DEPOCHANGE
;
398 if (dwc
->lfps_filter_quirk
)
399 reg
|= DWC3_GUSB3PIPECTL_LFPSFILT
;
401 if (dwc
->rx_detect_poll_quirk
)
402 reg
|= DWC3_GUSB3PIPECTL_RX_DETOPOLL
;
404 if (dwc
->tx_de_emphasis_quirk
)
405 reg
|= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc
->tx_de_emphasis
);
407 if (dwc
->dis_u3_susphy_quirk
)
408 reg
&= ~DWC3_GUSB3PIPECTL_SUSPHY
;
410 dwc3_writel(dwc
->regs
, DWC3_GUSB3PIPECTL(0), reg
);
414 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB2PHYCFG(0));
417 * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
418 * '0' during coreConsultant configuration. So default value will
419 * be '0' when the core is reset. Application needs to set it to
420 * '1' after the core initialization is completed.
422 if (dwc
->revision
> DWC3_REVISION_194A
)
423 reg
|= DWC3_GUSB2PHYCFG_SUSPHY
;
425 if (dwc
->dis_u2_susphy_quirk
)
426 reg
&= ~DWC3_GUSB2PHYCFG_SUSPHY
;
428 dwc3_writel(dwc
->regs
, DWC3_GUSB2PHYCFG(0), reg
);
434 * dwc3_core_init - Low-level initialization of DWC3 Core
435 * @dwc: Pointer to our controller context structure
437 * Returns 0 on success otherwise negative errno.
439 static int dwc3_core_init(struct dwc3
*dwc
)
441 unsigned long timeout
;
442 u32 hwparams4
= dwc
->hwparams
.hwparams4
;
446 reg
= dwc3_readl(dwc
->regs
, DWC3_GSNPSID
);
447 /* This should read as U3 followed by revision number */
448 if ((reg
& DWC3_GSNPSID_MASK
) != 0x55330000) {
449 dev_err(dwc
->dev
, "this is not a DesignWare USB3 DRD Core\n");
456 * Write Linux Version Code to our GUID register so it's easy to figure
457 * out which kernel version a bug was found.
459 dwc3_writel(dwc
->regs
, DWC3_GUID
, LINUX_VERSION_CODE
);
461 /* Handle USB2.0-only core configuration */
462 if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc
->hwparams
.hwparams3
) ==
463 DWC3_GHWPARAMS3_SSPHY_IFC_DIS
) {
464 if (dwc
->maximum_speed
== USB_SPEED_SUPER
)
465 dwc
->maximum_speed
= USB_SPEED_HIGH
;
468 /* issue device SoftReset too */
469 timeout
= jiffies
+ msecs_to_jiffies(500);
470 dwc3_writel(dwc
->regs
, DWC3_DCTL
, DWC3_DCTL_CSFTRST
);
472 reg
= dwc3_readl(dwc
->regs
, DWC3_DCTL
);
473 if (!(reg
& DWC3_DCTL_CSFTRST
))
476 if (time_after(jiffies
, timeout
)) {
477 dev_err(dwc
->dev
, "Reset Timed Out\n");
485 ret
= dwc3_core_soft_reset(dwc
);
489 reg
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
490 reg
&= ~DWC3_GCTL_SCALEDOWN_MASK
;
492 switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc
->hwparams
.hwparams1
)) {
493 case DWC3_GHWPARAMS1_EN_PWROPT_CLK
:
495 * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an
496 * issue which would cause xHCI compliance tests to fail.
498 * Because of that we cannot enable clock gating on such
503 * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based
506 if ((dwc
->dr_mode
== USB_DR_MODE_HOST
||
507 dwc
->dr_mode
== USB_DR_MODE_OTG
) &&
508 (dwc
->revision
>= DWC3_REVISION_210A
&&
509 dwc
->revision
<= DWC3_REVISION_250A
))
510 reg
|= DWC3_GCTL_DSBLCLKGTNG
| DWC3_GCTL_SOFITPSYNC
;
512 reg
&= ~DWC3_GCTL_DSBLCLKGTNG
;
514 case DWC3_GHWPARAMS1_EN_PWROPT_HIB
:
515 /* enable hibernation here */
516 dwc
->nr_scratch
= DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4
);
519 * REVISIT Enabling this bit so that host-mode hibernation
520 * will work. Device-mode hibernation is not yet implemented.
522 reg
|= DWC3_GCTL_GBLHIBERNATIONEN
;
525 dev_dbg(dwc
->dev
, "No power optimization available\n");
528 /* check if current dwc3 is on simulation board */
529 if (dwc
->hwparams
.hwparams6
& DWC3_GHWPARAMS6_EN_FPGA
) {
530 dev_dbg(dwc
->dev
, "it is on FPGA board\n");
534 WARN_ONCE(dwc
->disable_scramble_quirk
&& !dwc
->is_fpga
,
535 "disable_scramble cannot be used on non-FPGA builds\n");
537 if (dwc
->disable_scramble_quirk
&& dwc
->is_fpga
)
538 reg
|= DWC3_GCTL_DISSCRAMBLE
;
540 reg
&= ~DWC3_GCTL_DISSCRAMBLE
;
542 if (dwc
->u2exit_lfps_quirk
)
543 reg
|= DWC3_GCTL_U2EXIT_LFPS
;
546 * WORKAROUND: DWC3 revisions <1.90a have a bug
547 * where the device can fail to connect at SuperSpeed
548 * and falls back to high-speed mode which causes
549 * the device to enter a Connect/Disconnect loop
551 if (dwc
->revision
< DWC3_REVISION_190A
)
552 reg
|= DWC3_GCTL_U2RSTECN
;
554 dwc3_core_num_eps(dwc
);
556 dwc3_writel(dwc
->regs
, DWC3_GCTL
, reg
);
560 ret
= dwc3_alloc_scratch_buffers(dwc
);
564 ret
= dwc3_setup_scratch_buffers(dwc
);
571 dwc3_free_scratch_buffers(dwc
);
574 usb_phy_shutdown(dwc
->usb2_phy
);
575 usb_phy_shutdown(dwc
->usb3_phy
);
576 phy_exit(dwc
->usb2_generic_phy
);
577 phy_exit(dwc
->usb3_generic_phy
);
583 static void dwc3_core_exit(struct dwc3
*dwc
)
585 dwc3_free_scratch_buffers(dwc
);
586 usb_phy_shutdown(dwc
->usb2_phy
);
587 usb_phy_shutdown(dwc
->usb3_phy
);
588 phy_exit(dwc
->usb2_generic_phy
);
589 phy_exit(dwc
->usb3_generic_phy
);
592 static int dwc3_core_get_phy(struct dwc3
*dwc
)
594 struct device
*dev
= dwc
->dev
;
595 struct device_node
*node
= dev
->of_node
;
599 dwc
->usb2_phy
= devm_usb_get_phy_by_phandle(dev
, "usb-phy", 0);
600 dwc
->usb3_phy
= devm_usb_get_phy_by_phandle(dev
, "usb-phy", 1);
602 dwc
->usb2_phy
= devm_usb_get_phy(dev
, USB_PHY_TYPE_USB2
);
603 dwc
->usb3_phy
= devm_usb_get_phy(dev
, USB_PHY_TYPE_USB3
);
606 if (IS_ERR(dwc
->usb2_phy
)) {
607 ret
= PTR_ERR(dwc
->usb2_phy
);
608 if (ret
== -ENXIO
|| ret
== -ENODEV
) {
609 dwc
->usb2_phy
= NULL
;
610 } else if (ret
== -EPROBE_DEFER
) {
613 dev_err(dev
, "no usb2 phy configured\n");
618 if (IS_ERR(dwc
->usb3_phy
)) {
619 ret
= PTR_ERR(dwc
->usb3_phy
);
620 if (ret
== -ENXIO
|| ret
== -ENODEV
) {
621 dwc
->usb3_phy
= NULL
;
622 } else if (ret
== -EPROBE_DEFER
) {
625 dev_err(dev
, "no usb3 phy configured\n");
630 dwc
->usb2_generic_phy
= devm_phy_get(dev
, "usb2-phy");
631 if (IS_ERR(dwc
->usb2_generic_phy
)) {
632 ret
= PTR_ERR(dwc
->usb2_generic_phy
);
633 if (ret
== -ENOSYS
|| ret
== -ENODEV
) {
634 dwc
->usb2_generic_phy
= NULL
;
635 } else if (ret
== -EPROBE_DEFER
) {
638 dev_err(dev
, "no usb2 phy configured\n");
643 dwc
->usb3_generic_phy
= devm_phy_get(dev
, "usb3-phy");
644 if (IS_ERR(dwc
->usb3_generic_phy
)) {
645 ret
= PTR_ERR(dwc
->usb3_generic_phy
);
646 if (ret
== -ENOSYS
|| ret
== -ENODEV
) {
647 dwc
->usb3_generic_phy
= NULL
;
648 } else if (ret
== -EPROBE_DEFER
) {
651 dev_err(dev
, "no usb3 phy configured\n");
659 static int dwc3_core_init_mode(struct dwc3
*dwc
)
661 struct device
*dev
= dwc
->dev
;
664 switch (dwc
->dr_mode
) {
665 case USB_DR_MODE_PERIPHERAL
:
666 dwc3_set_mode(dwc
, DWC3_GCTL_PRTCAP_DEVICE
);
667 ret
= dwc3_gadget_init(dwc
);
669 dev_err(dev
, "failed to initialize gadget\n");
673 case USB_DR_MODE_HOST
:
674 dwc3_set_mode(dwc
, DWC3_GCTL_PRTCAP_HOST
);
675 ret
= dwc3_host_init(dwc
);
677 dev_err(dev
, "failed to initialize host\n");
681 case USB_DR_MODE_OTG
:
682 dwc3_set_mode(dwc
, DWC3_GCTL_PRTCAP_OTG
);
683 ret
= dwc3_host_init(dwc
);
685 dev_err(dev
, "failed to initialize host\n");
689 ret
= dwc3_gadget_init(dwc
);
691 dev_err(dev
, "failed to initialize gadget\n");
696 dev_err(dev
, "Unsupported mode of operation %d\n", dwc
->dr_mode
);
703 static void dwc3_core_exit_mode(struct dwc3
*dwc
)
705 switch (dwc
->dr_mode
) {
706 case USB_DR_MODE_PERIPHERAL
:
707 dwc3_gadget_exit(dwc
);
709 case USB_DR_MODE_HOST
:
712 case USB_DR_MODE_OTG
:
714 dwc3_gadget_exit(dwc
);
722 #define DWC3_ALIGN_MASK (16 - 1)
724 static int dwc3_probe(struct platform_device
*pdev
)
726 struct device
*dev
= &pdev
->dev
;
727 struct dwc3_platform_data
*pdata
= dev_get_platdata(dev
);
728 struct device_node
*node
= dev
->of_node
;
729 struct resource
*res
;
731 u8 lpm_nyet_threshold
;
740 mem
= devm_kzalloc(dev
, sizeof(*dwc
) + DWC3_ALIGN_MASK
, GFP_KERNEL
);
744 dwc
= PTR_ALIGN(mem
, DWC3_ALIGN_MASK
+ 1);
748 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
750 dev_err(dev
, "missing IRQ\n");
753 dwc
->xhci_resources
[1].start
= res
->start
;
754 dwc
->xhci_resources
[1].end
= res
->end
;
755 dwc
->xhci_resources
[1].flags
= res
->flags
;
756 dwc
->xhci_resources
[1].name
= res
->name
;
758 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
760 dev_err(dev
, "missing memory resource\n");
764 dwc
->xhci_resources
[0].start
= res
->start
;
765 dwc
->xhci_resources
[0].end
= dwc
->xhci_resources
[0].start
+
767 dwc
->xhci_resources
[0].flags
= res
->flags
;
768 dwc
->xhci_resources
[0].name
= res
->name
;
770 res
->start
+= DWC3_GLOBALS_REGS_START
;
773 * Request memory region but exclude xHCI regs,
774 * since it will be requested by the xhci-plat driver.
776 regs
= devm_ioremap_resource(dev
, res
);
778 return PTR_ERR(regs
);
781 dwc
->regs_size
= resource_size(res
);
783 * restore res->start back to its original value so that,
784 * in case the probe is deferred, we don't end up getting error in
785 * request the memory region the next time probe is called.
787 res
->start
-= DWC3_GLOBALS_REGS_START
;
789 /* default to highest possible threshold */
790 lpm_nyet_threshold
= 0xff;
792 /* default to -3.5dB de-emphasis */
796 * default to assert utmi_sleep_n and use maximum allowed HIRD
797 * threshold value of 0b1100
802 dwc
->maximum_speed
= of_usb_get_maximum_speed(node
);
803 dwc
->has_lpm_erratum
= of_property_read_bool(node
,
804 "snps,has-lpm-erratum");
805 of_property_read_u8(node
, "snps,lpm-nyet-threshold",
806 &lpm_nyet_threshold
);
807 dwc
->is_utmi_l1_suspend
= of_property_read_bool(node
,
808 "snps,is-utmi-l1-suspend");
809 of_property_read_u8(node
, "snps,hird-threshold",
812 dwc
->needs_fifo_resize
= of_property_read_bool(node
,
814 dwc
->dr_mode
= of_usb_get_dr_mode(node
);
816 dwc
->disable_scramble_quirk
= of_property_read_bool(node
,
817 "snps,disable_scramble_quirk");
818 dwc
->u2exit_lfps_quirk
= of_property_read_bool(node
,
819 "snps,u2exit_lfps_quirk");
820 dwc
->u2ss_inp3_quirk
= of_property_read_bool(node
,
821 "snps,u2ss_inp3_quirk");
822 dwc
->req_p1p2p3_quirk
= of_property_read_bool(node
,
823 "snps,req_p1p2p3_quirk");
824 dwc
->del_p1p2p3_quirk
= of_property_read_bool(node
,
825 "snps,del_p1p2p3_quirk");
826 dwc
->del_phy_power_chg_quirk
= of_property_read_bool(node
,
827 "snps,del_phy_power_chg_quirk");
828 dwc
->lfps_filter_quirk
= of_property_read_bool(node
,
829 "snps,lfps_filter_quirk");
830 dwc
->rx_detect_poll_quirk
= of_property_read_bool(node
,
831 "snps,rx_detect_poll_quirk");
832 dwc
->dis_u3_susphy_quirk
= of_property_read_bool(node
,
833 "snps,dis_u3_susphy_quirk");
834 dwc
->dis_u2_susphy_quirk
= of_property_read_bool(node
,
835 "snps,dis_u2_susphy_quirk");
837 dwc
->tx_de_emphasis_quirk
= of_property_read_bool(node
,
838 "snps,tx_de_emphasis_quirk");
839 of_property_read_u8(node
, "snps,tx_de_emphasis",
842 dwc
->maximum_speed
= pdata
->maximum_speed
;
843 dwc
->has_lpm_erratum
= pdata
->has_lpm_erratum
;
844 if (pdata
->lpm_nyet_threshold
)
845 lpm_nyet_threshold
= pdata
->lpm_nyet_threshold
;
846 dwc
->is_utmi_l1_suspend
= pdata
->is_utmi_l1_suspend
;
847 if (pdata
->hird_threshold
)
848 hird_threshold
= pdata
->hird_threshold
;
850 dwc
->needs_fifo_resize
= pdata
->tx_fifo_resize
;
851 dwc
->dr_mode
= pdata
->dr_mode
;
853 dwc
->disable_scramble_quirk
= pdata
->disable_scramble_quirk
;
854 dwc
->u2exit_lfps_quirk
= pdata
->u2exit_lfps_quirk
;
855 dwc
->u2ss_inp3_quirk
= pdata
->u2ss_inp3_quirk
;
856 dwc
->req_p1p2p3_quirk
= pdata
->req_p1p2p3_quirk
;
857 dwc
->del_p1p2p3_quirk
= pdata
->del_p1p2p3_quirk
;
858 dwc
->del_phy_power_chg_quirk
= pdata
->del_phy_power_chg_quirk
;
859 dwc
->lfps_filter_quirk
= pdata
->lfps_filter_quirk
;
860 dwc
->rx_detect_poll_quirk
= pdata
->rx_detect_poll_quirk
;
861 dwc
->dis_u3_susphy_quirk
= pdata
->dis_u3_susphy_quirk
;
862 dwc
->dis_u2_susphy_quirk
= pdata
->dis_u2_susphy_quirk
;
864 dwc
->tx_de_emphasis_quirk
= pdata
->tx_de_emphasis_quirk
;
865 if (pdata
->tx_de_emphasis
)
866 tx_de_emphasis
= pdata
->tx_de_emphasis
;
869 /* default to superspeed if no maximum_speed passed */
870 if (dwc
->maximum_speed
== USB_SPEED_UNKNOWN
)
871 dwc
->maximum_speed
= USB_SPEED_SUPER
;
873 dwc
->lpm_nyet_threshold
= lpm_nyet_threshold
;
874 dwc
->tx_de_emphasis
= tx_de_emphasis
;
876 dwc
->hird_threshold
= hird_threshold
877 | (dwc
->is_utmi_l1_suspend
<< 4);
879 ret
= dwc3_core_get_phy(dwc
);
883 spin_lock_init(&dwc
->lock
);
884 platform_set_drvdata(pdev
, dwc
);
886 if (!dev
->dma_mask
) {
887 dev
->dma_mask
= dev
->parent
->dma_mask
;
888 dev
->dma_parms
= dev
->parent
->dma_parms
;
889 dma_set_coherent_mask(dev
, dev
->parent
->coherent_dma_mask
);
892 pm_runtime_enable(dev
);
893 pm_runtime_get_sync(dev
);
894 pm_runtime_forbid(dev
);
896 dwc3_cache_hwparams(dwc
);
898 ret
= dwc3_alloc_event_buffers(dwc
, DWC3_EVENT_BUFFERS_SIZE
);
900 dev_err(dwc
->dev
, "failed to allocate event buffers\n");
905 if (IS_ENABLED(CONFIG_USB_DWC3_HOST
))
906 dwc
->dr_mode
= USB_DR_MODE_HOST
;
907 else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET
))
908 dwc
->dr_mode
= USB_DR_MODE_PERIPHERAL
;
910 if (dwc
->dr_mode
== USB_DR_MODE_UNKNOWN
)
911 dwc
->dr_mode
= USB_DR_MODE_OTG
;
913 ret
= dwc3_core_init(dwc
);
915 dev_err(dev
, "failed to initialize core\n");
919 usb_phy_set_suspend(dwc
->usb2_phy
, 0);
920 usb_phy_set_suspend(dwc
->usb3_phy
, 0);
921 ret
= phy_power_on(dwc
->usb2_generic_phy
);
925 ret
= phy_power_on(dwc
->usb3_generic_phy
);
927 goto err_usb2phy_power
;
929 ret
= dwc3_event_buffers_setup(dwc
);
931 dev_err(dwc
->dev
, "failed to setup event buffers\n");
932 goto err_usb3phy_power
;
935 ret
= dwc3_core_init_mode(dwc
);
939 ret
= dwc3_debugfs_init(dwc
);
941 dev_err(dev
, "failed to initialize debugfs\n");
945 pm_runtime_allow(dev
);
950 dwc3_core_exit_mode(dwc
);
953 dwc3_event_buffers_cleanup(dwc
);
956 phy_power_off(dwc
->usb3_generic_phy
);
959 phy_power_off(dwc
->usb2_generic_phy
);
962 usb_phy_set_suspend(dwc
->usb2_phy
, 1);
963 usb_phy_set_suspend(dwc
->usb3_phy
, 1);
967 dwc3_free_event_buffers(dwc
);
972 static int dwc3_remove(struct platform_device
*pdev
)
974 struct dwc3
*dwc
= platform_get_drvdata(pdev
);
976 dwc3_debugfs_exit(dwc
);
977 dwc3_core_exit_mode(dwc
);
978 dwc3_event_buffers_cleanup(dwc
);
979 dwc3_free_event_buffers(dwc
);
981 usb_phy_set_suspend(dwc
->usb2_phy
, 1);
982 usb_phy_set_suspend(dwc
->usb3_phy
, 1);
983 phy_power_off(dwc
->usb2_generic_phy
);
984 phy_power_off(dwc
->usb3_generic_phy
);
988 pm_runtime_put_sync(&pdev
->dev
);
989 pm_runtime_disable(&pdev
->dev
);
994 #ifdef CONFIG_PM_SLEEP
995 static int dwc3_suspend(struct device
*dev
)
997 struct dwc3
*dwc
= dev_get_drvdata(dev
);
1000 spin_lock_irqsave(&dwc
->lock
, flags
);
1002 switch (dwc
->dr_mode
) {
1003 case USB_DR_MODE_PERIPHERAL
:
1004 case USB_DR_MODE_OTG
:
1005 dwc3_gadget_suspend(dwc
);
1007 case USB_DR_MODE_HOST
:
1009 dwc3_event_buffers_cleanup(dwc
);
1013 dwc
->gctl
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
1014 spin_unlock_irqrestore(&dwc
->lock
, flags
);
1016 usb_phy_shutdown(dwc
->usb3_phy
);
1017 usb_phy_shutdown(dwc
->usb2_phy
);
1018 phy_exit(dwc
->usb2_generic_phy
);
1019 phy_exit(dwc
->usb3_generic_phy
);
1024 static int dwc3_resume(struct device
*dev
)
1026 struct dwc3
*dwc
= dev_get_drvdata(dev
);
1027 unsigned long flags
;
1030 usb_phy_init(dwc
->usb3_phy
);
1031 usb_phy_init(dwc
->usb2_phy
);
1032 ret
= phy_init(dwc
->usb2_generic_phy
);
1036 ret
= phy_init(dwc
->usb3_generic_phy
);
1038 goto err_usb2phy_init
;
1040 spin_lock_irqsave(&dwc
->lock
, flags
);
1042 dwc3_event_buffers_setup(dwc
);
1043 dwc3_writel(dwc
->regs
, DWC3_GCTL
, dwc
->gctl
);
1045 switch (dwc
->dr_mode
) {
1046 case USB_DR_MODE_PERIPHERAL
:
1047 case USB_DR_MODE_OTG
:
1048 dwc3_gadget_resume(dwc
);
1050 case USB_DR_MODE_HOST
:
1056 spin_unlock_irqrestore(&dwc
->lock
, flags
);
1058 pm_runtime_disable(dev
);
1059 pm_runtime_set_active(dev
);
1060 pm_runtime_enable(dev
);
1065 phy_exit(dwc
->usb2_generic_phy
);
1070 static const struct dev_pm_ops dwc3_dev_pm_ops
= {
1071 SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend
, dwc3_resume
)
1074 #define DWC3_PM_OPS &(dwc3_dev_pm_ops)
1076 #define DWC3_PM_OPS NULL
1080 static const struct of_device_id of_dwc3_match
[] = {
1082 .compatible
= "snps,dwc3"
1085 .compatible
= "synopsys,dwc3"
1089 MODULE_DEVICE_TABLE(of
, of_dwc3_match
);
1094 #define ACPI_ID_INTEL_BSW "808622B7"
1096 static const struct acpi_device_id dwc3_acpi_match
[] = {
1097 { ACPI_ID_INTEL_BSW
, 0 },
1100 MODULE_DEVICE_TABLE(acpi
, dwc3_acpi_match
);
1103 static struct platform_driver dwc3_driver
= {
1104 .probe
= dwc3_probe
,
1105 .remove
= dwc3_remove
,
1108 .of_match_table
= of_match_ptr(of_dwc3_match
),
1109 .acpi_match_table
= ACPI_PTR(dwc3_acpi_match
),
1114 module_platform_driver(dwc3_driver
);
1116 MODULE_ALIAS("platform:dwc3");
1117 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1118 MODULE_LICENSE("GPL v2");
1119 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");