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_soft_reset - Issue soft reset
121 * @dwc: Pointer to our controller context structure
123 static int dwc3_soft_reset(struct dwc3
*dwc
)
125 unsigned long timeout
;
128 timeout
= jiffies
+ msecs_to_jiffies(500);
129 dwc3_writel(dwc
->regs
, DWC3_DCTL
, DWC3_DCTL_CSFTRST
);
131 reg
= dwc3_readl(dwc
->regs
, DWC3_DCTL
);
132 if (!(reg
& DWC3_DCTL_CSFTRST
))
135 if (time_after(jiffies
, timeout
)) {
136 dev_err(dwc
->dev
, "Reset Timed Out\n");
147 * dwc3_free_one_event_buffer - Frees one event buffer
148 * @dwc: Pointer to our controller context structure
149 * @evt: Pointer to event buffer to be freed
151 static void dwc3_free_one_event_buffer(struct dwc3
*dwc
,
152 struct dwc3_event_buffer
*evt
)
154 dma_free_coherent(dwc
->dev
, evt
->length
, evt
->buf
, evt
->dma
);
158 * dwc3_alloc_one_event_buffer - Allocates one event buffer structure
159 * @dwc: Pointer to our controller context structure
160 * @length: size of the event buffer
162 * Returns a pointer to the allocated event buffer structure on success
163 * otherwise ERR_PTR(errno).
165 static struct dwc3_event_buffer
*dwc3_alloc_one_event_buffer(struct dwc3
*dwc
,
168 struct dwc3_event_buffer
*evt
;
170 evt
= devm_kzalloc(dwc
->dev
, sizeof(*evt
), GFP_KERNEL
);
172 return ERR_PTR(-ENOMEM
);
175 evt
->length
= length
;
176 evt
->buf
= dma_alloc_coherent(dwc
->dev
, length
,
177 &evt
->dma
, GFP_KERNEL
);
179 return ERR_PTR(-ENOMEM
);
185 * dwc3_free_event_buffers - frees all allocated event buffers
186 * @dwc: Pointer to our controller context structure
188 static void dwc3_free_event_buffers(struct dwc3
*dwc
)
190 struct dwc3_event_buffer
*evt
;
193 for (i
= 0; i
< dwc
->num_event_buffers
; i
++) {
194 evt
= dwc
->ev_buffs
[i
];
196 dwc3_free_one_event_buffer(dwc
, evt
);
201 * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
202 * @dwc: pointer to our controller context structure
203 * @length: size of event buffer
205 * Returns 0 on success otherwise negative errno. In the error case, dwc
206 * may contain some buffers allocated but not all which were requested.
208 static int dwc3_alloc_event_buffers(struct dwc3
*dwc
, unsigned length
)
213 num
= DWC3_NUM_INT(dwc
->hwparams
.hwparams1
);
214 dwc
->num_event_buffers
= num
;
216 dwc
->ev_buffs
= devm_kzalloc(dwc
->dev
, sizeof(*dwc
->ev_buffs
) * num
,
221 for (i
= 0; i
< num
; i
++) {
222 struct dwc3_event_buffer
*evt
;
224 evt
= dwc3_alloc_one_event_buffer(dwc
, length
);
226 dev_err(dwc
->dev
, "can't allocate event buffer\n");
229 dwc
->ev_buffs
[i
] = evt
;
236 * dwc3_event_buffers_setup - setup our allocated event buffers
237 * @dwc: pointer to our controller context structure
239 * Returns 0 on success otherwise negative errno.
241 static int dwc3_event_buffers_setup(struct dwc3
*dwc
)
243 struct dwc3_event_buffer
*evt
;
246 for (n
= 0; n
< dwc
->num_event_buffers
; n
++) {
247 evt
= dwc
->ev_buffs
[n
];
248 dev_dbg(dwc
->dev
, "Event buf %p dma %08llx length %d\n",
249 evt
->buf
, (unsigned long long) evt
->dma
,
254 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRLO(n
),
255 lower_32_bits(evt
->dma
));
256 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRHI(n
),
257 upper_32_bits(evt
->dma
));
258 dwc3_writel(dwc
->regs
, DWC3_GEVNTSIZ(n
),
259 DWC3_GEVNTSIZ_SIZE(evt
->length
));
260 dwc3_writel(dwc
->regs
, DWC3_GEVNTCOUNT(n
), 0);
266 static void dwc3_event_buffers_cleanup(struct dwc3
*dwc
)
268 struct dwc3_event_buffer
*evt
;
271 for (n
= 0; n
< dwc
->num_event_buffers
; n
++) {
272 evt
= dwc
->ev_buffs
[n
];
276 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRLO(n
), 0);
277 dwc3_writel(dwc
->regs
, DWC3_GEVNTADRHI(n
), 0);
278 dwc3_writel(dwc
->regs
, DWC3_GEVNTSIZ(n
), DWC3_GEVNTSIZ_INTMASK
279 | DWC3_GEVNTSIZ_SIZE(0));
280 dwc3_writel(dwc
->regs
, DWC3_GEVNTCOUNT(n
), 0);
284 static int dwc3_alloc_scratch_buffers(struct dwc3
*dwc
)
286 if (!dwc
->has_hibernation
)
289 if (!dwc
->nr_scratch
)
292 dwc
->scratchbuf
= kmalloc_array(dwc
->nr_scratch
,
293 DWC3_SCRATCHBUF_SIZE
, GFP_KERNEL
);
294 if (!dwc
->scratchbuf
)
300 static int dwc3_setup_scratch_buffers(struct dwc3
*dwc
)
302 dma_addr_t scratch_addr
;
306 if (!dwc
->has_hibernation
)
309 if (!dwc
->nr_scratch
)
312 /* should never fall here */
313 if (!WARN_ON(dwc
->scratchbuf
))
316 scratch_addr
= dma_map_single(dwc
->dev
, dwc
->scratchbuf
,
317 dwc
->nr_scratch
* DWC3_SCRATCHBUF_SIZE
,
319 if (dma_mapping_error(dwc
->dev
, scratch_addr
)) {
320 dev_err(dwc
->dev
, "failed to map scratch buffer\n");
325 dwc
->scratch_addr
= scratch_addr
;
327 param
= lower_32_bits(scratch_addr
);
329 ret
= dwc3_send_gadget_generic_command(dwc
,
330 DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO
, param
);
334 param
= upper_32_bits(scratch_addr
);
336 ret
= dwc3_send_gadget_generic_command(dwc
,
337 DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI
, param
);
344 dma_unmap_single(dwc
->dev
, dwc
->scratch_addr
, dwc
->nr_scratch
*
345 DWC3_SCRATCHBUF_SIZE
, DMA_BIDIRECTIONAL
);
351 static void dwc3_free_scratch_buffers(struct dwc3
*dwc
)
353 if (!dwc
->has_hibernation
)
356 if (!dwc
->nr_scratch
)
359 /* should never fall here */
360 if (!WARN_ON(dwc
->scratchbuf
))
363 dma_unmap_single(dwc
->dev
, dwc
->scratch_addr
, dwc
->nr_scratch
*
364 DWC3_SCRATCHBUF_SIZE
, DMA_BIDIRECTIONAL
);
365 kfree(dwc
->scratchbuf
);
368 static void dwc3_core_num_eps(struct dwc3
*dwc
)
370 struct dwc3_hwparams
*parms
= &dwc
->hwparams
;
372 dwc
->num_in_eps
= DWC3_NUM_IN_EPS(parms
);
373 dwc
->num_out_eps
= DWC3_NUM_EPS(parms
) - dwc
->num_in_eps
;
375 dwc3_trace(trace_dwc3_core
, "found %d IN and %d OUT endpoints",
376 dwc
->num_in_eps
, dwc
->num_out_eps
);
379 static void dwc3_cache_hwparams(struct dwc3
*dwc
)
381 struct dwc3_hwparams
*parms
= &dwc
->hwparams
;
383 parms
->hwparams0
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS0
);
384 parms
->hwparams1
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS1
);
385 parms
->hwparams2
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS2
);
386 parms
->hwparams3
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS3
);
387 parms
->hwparams4
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS4
);
388 parms
->hwparams5
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS5
);
389 parms
->hwparams6
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS6
);
390 parms
->hwparams7
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS7
);
391 parms
->hwparams8
= dwc3_readl(dwc
->regs
, DWC3_GHWPARAMS8
);
395 * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
396 * @dwc: Pointer to our controller context structure
398 * Returns 0 on success. The USB PHY interfaces are configured but not
399 * initialized. The PHY interfaces and the PHYs get initialized together with
400 * the core in dwc3_core_init.
402 static int dwc3_phy_setup(struct dwc3
*dwc
)
407 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB3PIPECTL(0));
410 * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
411 * to '0' during coreConsultant configuration. So default value
412 * will be '0' when the core is reset. Application needs to set it
413 * to '1' after the core initialization is completed.
415 if (dwc
->revision
> DWC3_REVISION_194A
)
416 reg
|= DWC3_GUSB3PIPECTL_SUSPHY
;
418 if (dwc
->u2ss_inp3_quirk
)
419 reg
|= DWC3_GUSB3PIPECTL_U2SSINP3OK
;
421 if (dwc
->req_p1p2p3_quirk
)
422 reg
|= DWC3_GUSB3PIPECTL_REQP1P2P3
;
424 if (dwc
->del_p1p2p3_quirk
)
425 reg
|= DWC3_GUSB3PIPECTL_DEP1P2P3_EN
;
427 if (dwc
->del_phy_power_chg_quirk
)
428 reg
|= DWC3_GUSB3PIPECTL_DEPOCHANGE
;
430 if (dwc
->lfps_filter_quirk
)
431 reg
|= DWC3_GUSB3PIPECTL_LFPSFILT
;
433 if (dwc
->rx_detect_poll_quirk
)
434 reg
|= DWC3_GUSB3PIPECTL_RX_DETOPOLL
;
436 if (dwc
->tx_de_emphasis_quirk
)
437 reg
|= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc
->tx_de_emphasis
);
439 if (dwc
->dis_u3_susphy_quirk
)
440 reg
&= ~DWC3_GUSB3PIPECTL_SUSPHY
;
442 dwc3_writel(dwc
->regs
, DWC3_GUSB3PIPECTL(0), reg
);
444 reg
= dwc3_readl(dwc
->regs
, DWC3_GUSB2PHYCFG(0));
446 /* Select the HS PHY interface */
447 switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc
->hwparams
.hwparams3
)) {
448 case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI
:
449 if (dwc
->hsphy_interface
&&
450 !strncmp(dwc
->hsphy_interface
, "utmi", 4)) {
451 reg
&= ~DWC3_GUSB2PHYCFG_ULPI_UTMI
;
453 } else if (dwc
->hsphy_interface
&&
454 !strncmp(dwc
->hsphy_interface
, "ulpi", 4)) {
455 reg
|= DWC3_GUSB2PHYCFG_ULPI_UTMI
;
456 dwc3_writel(dwc
->regs
, DWC3_GUSB2PHYCFG(0), reg
);
458 /* Relying on default value. */
459 if (!(reg
& DWC3_GUSB2PHYCFG_ULPI_UTMI
))
463 case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI
:
464 /* Making sure the interface and PHY are operational */
465 ret
= dwc3_soft_reset(dwc
);
471 ret
= dwc3_ulpi_init(dwc
);
480 * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
481 * '0' during coreConsultant configuration. So default value will
482 * be '0' when the core is reset. Application needs to set it to
483 * '1' after the core initialization is completed.
485 if (dwc
->revision
> DWC3_REVISION_194A
)
486 reg
|= DWC3_GUSB2PHYCFG_SUSPHY
;
488 if (dwc
->dis_u2_susphy_quirk
)
489 reg
&= ~DWC3_GUSB2PHYCFG_SUSPHY
;
491 dwc3_writel(dwc
->regs
, DWC3_GUSB2PHYCFG(0), reg
);
497 * dwc3_core_init - Low-level initialization of DWC3 Core
498 * @dwc: Pointer to our controller context structure
500 * Returns 0 on success otherwise negative errno.
502 static int dwc3_core_init(struct dwc3
*dwc
)
504 u32 hwparams4
= dwc
->hwparams
.hwparams4
;
508 reg
= dwc3_readl(dwc
->regs
, DWC3_GSNPSID
);
509 /* This should read as U3 followed by revision number */
510 if ((reg
& DWC3_GSNPSID_MASK
) != 0x55330000) {
511 dev_err(dwc
->dev
, "this is not a DesignWare USB3 DRD Core\n");
518 * Write Linux Version Code to our GUID register so it's easy to figure
519 * out which kernel version a bug was found.
521 dwc3_writel(dwc
->regs
, DWC3_GUID
, LINUX_VERSION_CODE
);
523 /* Handle USB2.0-only core configuration */
524 if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc
->hwparams
.hwparams3
) ==
525 DWC3_GHWPARAMS3_SSPHY_IFC_DIS
) {
526 if (dwc
->maximum_speed
== USB_SPEED_SUPER
)
527 dwc
->maximum_speed
= USB_SPEED_HIGH
;
530 /* issue device SoftReset too */
531 ret
= dwc3_soft_reset(dwc
);
535 ret
= dwc3_core_soft_reset(dwc
);
539 reg
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
540 reg
&= ~DWC3_GCTL_SCALEDOWN_MASK
;
542 switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc
->hwparams
.hwparams1
)) {
543 case DWC3_GHWPARAMS1_EN_PWROPT_CLK
:
545 * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an
546 * issue which would cause xHCI compliance tests to fail.
548 * Because of that we cannot enable clock gating on such
553 * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based
556 if ((dwc
->dr_mode
== USB_DR_MODE_HOST
||
557 dwc
->dr_mode
== USB_DR_MODE_OTG
) &&
558 (dwc
->revision
>= DWC3_REVISION_210A
&&
559 dwc
->revision
<= DWC3_REVISION_250A
))
560 reg
|= DWC3_GCTL_DSBLCLKGTNG
| DWC3_GCTL_SOFITPSYNC
;
562 reg
&= ~DWC3_GCTL_DSBLCLKGTNG
;
564 case DWC3_GHWPARAMS1_EN_PWROPT_HIB
:
565 /* enable hibernation here */
566 dwc
->nr_scratch
= DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4
);
569 * REVISIT Enabling this bit so that host-mode hibernation
570 * will work. Device-mode hibernation is not yet implemented.
572 reg
|= DWC3_GCTL_GBLHIBERNATIONEN
;
575 dev_dbg(dwc
->dev
, "No power optimization available\n");
578 /* check if current dwc3 is on simulation board */
579 if (dwc
->hwparams
.hwparams6
& DWC3_GHWPARAMS6_EN_FPGA
) {
580 dev_dbg(dwc
->dev
, "it is on FPGA board\n");
584 WARN_ONCE(dwc
->disable_scramble_quirk
&& !dwc
->is_fpga
,
585 "disable_scramble cannot be used on non-FPGA builds\n");
587 if (dwc
->disable_scramble_quirk
&& dwc
->is_fpga
)
588 reg
|= DWC3_GCTL_DISSCRAMBLE
;
590 reg
&= ~DWC3_GCTL_DISSCRAMBLE
;
592 if (dwc
->u2exit_lfps_quirk
)
593 reg
|= DWC3_GCTL_U2EXIT_LFPS
;
596 * WORKAROUND: DWC3 revisions <1.90a have a bug
597 * where the device can fail to connect at SuperSpeed
598 * and falls back to high-speed mode which causes
599 * the device to enter a Connect/Disconnect loop
601 if (dwc
->revision
< DWC3_REVISION_190A
)
602 reg
|= DWC3_GCTL_U2RSTECN
;
604 dwc3_core_num_eps(dwc
);
606 dwc3_writel(dwc
->regs
, DWC3_GCTL
, reg
);
608 ret
= dwc3_alloc_scratch_buffers(dwc
);
612 ret
= dwc3_setup_scratch_buffers(dwc
);
619 dwc3_free_scratch_buffers(dwc
);
622 usb_phy_shutdown(dwc
->usb2_phy
);
623 usb_phy_shutdown(dwc
->usb3_phy
);
624 phy_exit(dwc
->usb2_generic_phy
);
625 phy_exit(dwc
->usb3_generic_phy
);
631 static void dwc3_core_exit(struct dwc3
*dwc
)
633 dwc3_free_scratch_buffers(dwc
);
634 usb_phy_shutdown(dwc
->usb2_phy
);
635 usb_phy_shutdown(dwc
->usb3_phy
);
636 phy_exit(dwc
->usb2_generic_phy
);
637 phy_exit(dwc
->usb3_generic_phy
);
640 static int dwc3_core_get_phy(struct dwc3
*dwc
)
642 struct device
*dev
= dwc
->dev
;
643 struct device_node
*node
= dev
->of_node
;
647 dwc
->usb2_phy
= devm_usb_get_phy_by_phandle(dev
, "usb-phy", 0);
648 dwc
->usb3_phy
= devm_usb_get_phy_by_phandle(dev
, "usb-phy", 1);
650 dwc
->usb2_phy
= devm_usb_get_phy(dev
, USB_PHY_TYPE_USB2
);
651 dwc
->usb3_phy
= devm_usb_get_phy(dev
, USB_PHY_TYPE_USB3
);
654 if (IS_ERR(dwc
->usb2_phy
)) {
655 ret
= PTR_ERR(dwc
->usb2_phy
);
656 if (ret
== -ENXIO
|| ret
== -ENODEV
) {
657 dwc
->usb2_phy
= NULL
;
658 } else if (ret
== -EPROBE_DEFER
) {
661 dev_err(dev
, "no usb2 phy configured\n");
666 if (IS_ERR(dwc
->usb3_phy
)) {
667 ret
= PTR_ERR(dwc
->usb3_phy
);
668 if (ret
== -ENXIO
|| ret
== -ENODEV
) {
669 dwc
->usb3_phy
= NULL
;
670 } else if (ret
== -EPROBE_DEFER
) {
673 dev_err(dev
, "no usb3 phy configured\n");
678 dwc
->usb2_generic_phy
= devm_phy_get(dev
, "usb2-phy");
679 if (IS_ERR(dwc
->usb2_generic_phy
)) {
680 ret
= PTR_ERR(dwc
->usb2_generic_phy
);
681 if (ret
== -ENOSYS
|| ret
== -ENODEV
) {
682 dwc
->usb2_generic_phy
= NULL
;
683 } else if (ret
== -EPROBE_DEFER
) {
686 dev_err(dev
, "no usb2 phy configured\n");
691 dwc
->usb3_generic_phy
= devm_phy_get(dev
, "usb3-phy");
692 if (IS_ERR(dwc
->usb3_generic_phy
)) {
693 ret
= PTR_ERR(dwc
->usb3_generic_phy
);
694 if (ret
== -ENOSYS
|| ret
== -ENODEV
) {
695 dwc
->usb3_generic_phy
= NULL
;
696 } else if (ret
== -EPROBE_DEFER
) {
699 dev_err(dev
, "no usb3 phy configured\n");
707 static int dwc3_core_init_mode(struct dwc3
*dwc
)
709 struct device
*dev
= dwc
->dev
;
712 switch (dwc
->dr_mode
) {
713 case USB_DR_MODE_PERIPHERAL
:
714 dwc3_set_mode(dwc
, DWC3_GCTL_PRTCAP_DEVICE
);
715 ret
= dwc3_gadget_init(dwc
);
717 dev_err(dev
, "failed to initialize gadget\n");
721 case USB_DR_MODE_HOST
:
722 dwc3_set_mode(dwc
, DWC3_GCTL_PRTCAP_HOST
);
723 ret
= dwc3_host_init(dwc
);
725 dev_err(dev
, "failed to initialize host\n");
729 case USB_DR_MODE_OTG
:
730 dwc3_set_mode(dwc
, DWC3_GCTL_PRTCAP_OTG
);
731 ret
= dwc3_host_init(dwc
);
733 dev_err(dev
, "failed to initialize host\n");
737 ret
= dwc3_gadget_init(dwc
);
739 dev_err(dev
, "failed to initialize gadget\n");
744 dev_err(dev
, "Unsupported mode of operation %d\n", dwc
->dr_mode
);
751 static void dwc3_core_exit_mode(struct dwc3
*dwc
)
753 switch (dwc
->dr_mode
) {
754 case USB_DR_MODE_PERIPHERAL
:
755 dwc3_gadget_exit(dwc
);
757 case USB_DR_MODE_HOST
:
760 case USB_DR_MODE_OTG
:
762 dwc3_gadget_exit(dwc
);
770 #define DWC3_ALIGN_MASK (16 - 1)
772 static int dwc3_probe(struct platform_device
*pdev
)
774 struct device
*dev
= &pdev
->dev
;
775 struct dwc3_platform_data
*pdata
= dev_get_platdata(dev
);
776 struct device_node
*node
= dev
->of_node
;
777 struct resource
*res
;
779 u8 lpm_nyet_threshold
;
788 mem
= devm_kzalloc(dev
, sizeof(*dwc
) + DWC3_ALIGN_MASK
, GFP_KERNEL
);
792 dwc
= PTR_ALIGN(mem
, DWC3_ALIGN_MASK
+ 1);
796 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
798 dev_err(dev
, "missing IRQ\n");
801 dwc
->xhci_resources
[1].start
= res
->start
;
802 dwc
->xhci_resources
[1].end
= res
->end
;
803 dwc
->xhci_resources
[1].flags
= res
->flags
;
804 dwc
->xhci_resources
[1].name
= res
->name
;
806 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
808 dev_err(dev
, "missing memory resource\n");
812 dwc
->xhci_resources
[0].start
= res
->start
;
813 dwc
->xhci_resources
[0].end
= dwc
->xhci_resources
[0].start
+
815 dwc
->xhci_resources
[0].flags
= res
->flags
;
816 dwc
->xhci_resources
[0].name
= res
->name
;
818 res
->start
+= DWC3_GLOBALS_REGS_START
;
821 * Request memory region but exclude xHCI regs,
822 * since it will be requested by the xhci-plat driver.
824 regs
= devm_ioremap_resource(dev
, res
);
831 dwc
->regs_size
= resource_size(res
);
833 /* default to highest possible threshold */
834 lpm_nyet_threshold
= 0xff;
836 /* default to -3.5dB de-emphasis */
840 * default to assert utmi_sleep_n and use maximum allowed HIRD
841 * threshold value of 0b1100
846 dwc
->maximum_speed
= of_usb_get_maximum_speed(node
);
847 dwc
->has_lpm_erratum
= of_property_read_bool(node
,
848 "snps,has-lpm-erratum");
849 of_property_read_u8(node
, "snps,lpm-nyet-threshold",
850 &lpm_nyet_threshold
);
851 dwc
->is_utmi_l1_suspend
= of_property_read_bool(node
,
852 "snps,is-utmi-l1-suspend");
853 of_property_read_u8(node
, "snps,hird-threshold",
855 dwc
->usb3_lpm_capable
= of_property_read_bool(node
,
856 "snps,usb3_lpm_capable");
858 dwc
->needs_fifo_resize
= of_property_read_bool(node
,
860 dwc
->dr_mode
= of_usb_get_dr_mode(node
);
862 dwc
->disable_scramble_quirk
= of_property_read_bool(node
,
863 "snps,disable_scramble_quirk");
864 dwc
->u2exit_lfps_quirk
= of_property_read_bool(node
,
865 "snps,u2exit_lfps_quirk");
866 dwc
->u2ss_inp3_quirk
= of_property_read_bool(node
,
867 "snps,u2ss_inp3_quirk");
868 dwc
->req_p1p2p3_quirk
= of_property_read_bool(node
,
869 "snps,req_p1p2p3_quirk");
870 dwc
->del_p1p2p3_quirk
= of_property_read_bool(node
,
871 "snps,del_p1p2p3_quirk");
872 dwc
->del_phy_power_chg_quirk
= of_property_read_bool(node
,
873 "snps,del_phy_power_chg_quirk");
874 dwc
->lfps_filter_quirk
= of_property_read_bool(node
,
875 "snps,lfps_filter_quirk");
876 dwc
->rx_detect_poll_quirk
= of_property_read_bool(node
,
877 "snps,rx_detect_poll_quirk");
878 dwc
->dis_u3_susphy_quirk
= of_property_read_bool(node
,
879 "snps,dis_u3_susphy_quirk");
880 dwc
->dis_u2_susphy_quirk
= of_property_read_bool(node
,
881 "snps,dis_u2_susphy_quirk");
883 dwc
->tx_de_emphasis_quirk
= of_property_read_bool(node
,
884 "snps,tx_de_emphasis_quirk");
885 of_property_read_u8(node
, "snps,tx_de_emphasis",
887 of_property_read_string(node
, "snps,hsphy_interface",
888 &dwc
->hsphy_interface
);
890 dwc
->maximum_speed
= pdata
->maximum_speed
;
891 dwc
->has_lpm_erratum
= pdata
->has_lpm_erratum
;
892 if (pdata
->lpm_nyet_threshold
)
893 lpm_nyet_threshold
= pdata
->lpm_nyet_threshold
;
894 dwc
->is_utmi_l1_suspend
= pdata
->is_utmi_l1_suspend
;
895 if (pdata
->hird_threshold
)
896 hird_threshold
= pdata
->hird_threshold
;
898 dwc
->needs_fifo_resize
= pdata
->tx_fifo_resize
;
899 dwc
->usb3_lpm_capable
= pdata
->usb3_lpm_capable
;
900 dwc
->dr_mode
= pdata
->dr_mode
;
902 dwc
->disable_scramble_quirk
= pdata
->disable_scramble_quirk
;
903 dwc
->u2exit_lfps_quirk
= pdata
->u2exit_lfps_quirk
;
904 dwc
->u2ss_inp3_quirk
= pdata
->u2ss_inp3_quirk
;
905 dwc
->req_p1p2p3_quirk
= pdata
->req_p1p2p3_quirk
;
906 dwc
->del_p1p2p3_quirk
= pdata
->del_p1p2p3_quirk
;
907 dwc
->del_phy_power_chg_quirk
= pdata
->del_phy_power_chg_quirk
;
908 dwc
->lfps_filter_quirk
= pdata
->lfps_filter_quirk
;
909 dwc
->rx_detect_poll_quirk
= pdata
->rx_detect_poll_quirk
;
910 dwc
->dis_u3_susphy_quirk
= pdata
->dis_u3_susphy_quirk
;
911 dwc
->dis_u2_susphy_quirk
= pdata
->dis_u2_susphy_quirk
;
913 dwc
->tx_de_emphasis_quirk
= pdata
->tx_de_emphasis_quirk
;
914 if (pdata
->tx_de_emphasis
)
915 tx_de_emphasis
= pdata
->tx_de_emphasis
;
917 dwc
->hsphy_interface
= pdata
->hsphy_interface
;
920 /* default to superspeed if no maximum_speed passed */
921 if (dwc
->maximum_speed
== USB_SPEED_UNKNOWN
)
922 dwc
->maximum_speed
= USB_SPEED_SUPER
;
924 dwc
->lpm_nyet_threshold
= lpm_nyet_threshold
;
925 dwc
->tx_de_emphasis
= tx_de_emphasis
;
927 dwc
->hird_threshold
= hird_threshold
928 | (dwc
->is_utmi_l1_suspend
<< 4);
930 platform_set_drvdata(pdev
, dwc
);
931 dwc3_cache_hwparams(dwc
);
933 ret
= dwc3_phy_setup(dwc
);
937 ret
= dwc3_core_get_phy(dwc
);
941 spin_lock_init(&dwc
->lock
);
943 if (!dev
->dma_mask
) {
944 dev
->dma_mask
= dev
->parent
->dma_mask
;
945 dev
->dma_parms
= dev
->parent
->dma_parms
;
946 dma_set_coherent_mask(dev
, dev
->parent
->coherent_dma_mask
);
949 pm_runtime_enable(dev
);
950 pm_runtime_get_sync(dev
);
951 pm_runtime_forbid(dev
);
953 ret
= dwc3_alloc_event_buffers(dwc
, DWC3_EVENT_BUFFERS_SIZE
);
955 dev_err(dwc
->dev
, "failed to allocate event buffers\n");
960 if (IS_ENABLED(CONFIG_USB_DWC3_HOST
))
961 dwc
->dr_mode
= USB_DR_MODE_HOST
;
962 else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET
))
963 dwc
->dr_mode
= USB_DR_MODE_PERIPHERAL
;
965 if (dwc
->dr_mode
== USB_DR_MODE_UNKNOWN
)
966 dwc
->dr_mode
= USB_DR_MODE_OTG
;
968 ret
= dwc3_core_init(dwc
);
970 dev_err(dev
, "failed to initialize core\n");
974 usb_phy_set_suspend(dwc
->usb2_phy
, 0);
975 usb_phy_set_suspend(dwc
->usb3_phy
, 0);
976 ret
= phy_power_on(dwc
->usb2_generic_phy
);
980 ret
= phy_power_on(dwc
->usb3_generic_phy
);
984 ret
= dwc3_event_buffers_setup(dwc
);
986 dev_err(dwc
->dev
, "failed to setup event buffers\n");
990 ret
= dwc3_core_init_mode(dwc
);
994 ret
= dwc3_debugfs_init(dwc
);
996 dev_err(dev
, "failed to initialize debugfs\n");
1000 pm_runtime_allow(dev
);
1005 dwc3_core_exit_mode(dwc
);
1008 dwc3_event_buffers_cleanup(dwc
);
1011 phy_power_off(dwc
->usb3_generic_phy
);
1014 phy_power_off(dwc
->usb2_generic_phy
);
1017 usb_phy_set_suspend(dwc
->usb2_phy
, 1);
1018 usb_phy_set_suspend(dwc
->usb3_phy
, 1);
1019 dwc3_core_exit(dwc
);
1022 dwc3_free_event_buffers(dwc
);
1023 dwc3_ulpi_exit(dwc
);
1027 * restore res->start back to its original value so that, in case the
1028 * probe is deferred, we don't end up getting error in request the
1029 * memory region the next time probe is called.
1031 res
->start
-= DWC3_GLOBALS_REGS_START
;
1036 static int dwc3_remove(struct platform_device
*pdev
)
1038 struct dwc3
*dwc
= platform_get_drvdata(pdev
);
1039 struct resource
*res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1042 * restore res->start back to its original value so that, in case the
1043 * probe is deferred, we don't end up getting error in request the
1044 * memory region the next time probe is called.
1046 res
->start
-= DWC3_GLOBALS_REGS_START
;
1048 dwc3_debugfs_exit(dwc
);
1049 dwc3_core_exit_mode(dwc
);
1050 dwc3_event_buffers_cleanup(dwc
);
1051 dwc3_free_event_buffers(dwc
);
1053 usb_phy_set_suspend(dwc
->usb2_phy
, 1);
1054 usb_phy_set_suspend(dwc
->usb3_phy
, 1);
1055 phy_power_off(dwc
->usb2_generic_phy
);
1056 phy_power_off(dwc
->usb3_generic_phy
);
1058 dwc3_core_exit(dwc
);
1059 dwc3_ulpi_exit(dwc
);
1061 pm_runtime_put_sync(&pdev
->dev
);
1062 pm_runtime_disable(&pdev
->dev
);
1067 #ifdef CONFIG_PM_SLEEP
1068 static int dwc3_suspend(struct device
*dev
)
1070 struct dwc3
*dwc
= dev_get_drvdata(dev
);
1071 unsigned long flags
;
1073 spin_lock_irqsave(&dwc
->lock
, flags
);
1075 switch (dwc
->dr_mode
) {
1076 case USB_DR_MODE_PERIPHERAL
:
1077 case USB_DR_MODE_OTG
:
1078 dwc3_gadget_suspend(dwc
);
1080 case USB_DR_MODE_HOST
:
1082 dwc3_event_buffers_cleanup(dwc
);
1086 dwc
->gctl
= dwc3_readl(dwc
->regs
, DWC3_GCTL
);
1087 spin_unlock_irqrestore(&dwc
->lock
, flags
);
1089 usb_phy_shutdown(dwc
->usb3_phy
);
1090 usb_phy_shutdown(dwc
->usb2_phy
);
1091 phy_exit(dwc
->usb2_generic_phy
);
1092 phy_exit(dwc
->usb3_generic_phy
);
1097 static int dwc3_resume(struct device
*dev
)
1099 struct dwc3
*dwc
= dev_get_drvdata(dev
);
1100 unsigned long flags
;
1103 usb_phy_init(dwc
->usb3_phy
);
1104 usb_phy_init(dwc
->usb2_phy
);
1105 ret
= phy_init(dwc
->usb2_generic_phy
);
1109 ret
= phy_init(dwc
->usb3_generic_phy
);
1111 goto err_usb2phy_init
;
1113 spin_lock_irqsave(&dwc
->lock
, flags
);
1115 dwc3_event_buffers_setup(dwc
);
1116 dwc3_writel(dwc
->regs
, DWC3_GCTL
, dwc
->gctl
);
1118 switch (dwc
->dr_mode
) {
1119 case USB_DR_MODE_PERIPHERAL
:
1120 case USB_DR_MODE_OTG
:
1121 dwc3_gadget_resume(dwc
);
1123 case USB_DR_MODE_HOST
:
1129 spin_unlock_irqrestore(&dwc
->lock
, flags
);
1131 pm_runtime_disable(dev
);
1132 pm_runtime_set_active(dev
);
1133 pm_runtime_enable(dev
);
1138 phy_exit(dwc
->usb2_generic_phy
);
1143 static const struct dev_pm_ops dwc3_dev_pm_ops
= {
1144 SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend
, dwc3_resume
)
1147 #define DWC3_PM_OPS &(dwc3_dev_pm_ops)
1149 #define DWC3_PM_OPS NULL
1153 static const struct of_device_id of_dwc3_match
[] = {
1155 .compatible
= "snps,dwc3"
1158 .compatible
= "synopsys,dwc3"
1162 MODULE_DEVICE_TABLE(of
, of_dwc3_match
);
1167 #define ACPI_ID_INTEL_BSW "808622B7"
1169 static const struct acpi_device_id dwc3_acpi_match
[] = {
1170 { ACPI_ID_INTEL_BSW
, 0 },
1173 MODULE_DEVICE_TABLE(acpi
, dwc3_acpi_match
);
1176 static struct platform_driver dwc3_driver
= {
1177 .probe
= dwc3_probe
,
1178 .remove
= dwc3_remove
,
1181 .of_match_table
= of_match_ptr(of_dwc3_match
),
1182 .acpi_match_table
= ACPI_PTR(dwc3_acpi_match
),
1187 module_platform_driver(dwc3_driver
);
1189 MODULE_ALIAS("platform:dwc3");
1190 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1191 MODULE_LICENSE("GPL v2");
1192 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");