Commit | Line | Data |
---|---|---|
72246da4 FB |
1 | /** |
2 | * core.c - DesignWare USB3 DRD Controller Core file | |
3 | * | |
4 | * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com | |
72246da4 FB |
5 | * |
6 | * Authors: Felipe Balbi <balbi@ti.com>, | |
7 | * Sebastian Andrzej Siewior <bigeasy@linutronix.de> | |
8 | * | |
5945f789 FB |
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. | |
72246da4 | 12 | * |
5945f789 FB |
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. | |
72246da4 | 17 | * |
5945f789 FB |
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/>. | |
72246da4 FB |
20 | */ |
21 | ||
fa0ea13e | 22 | #include <linux/version.h> |
a72e658b | 23 | #include <linux/module.h> |
72246da4 FB |
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> | |
31 | #include <linux/io.h> | |
32 | #include <linux/list.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/dma-mapping.h> | |
457e84b6 | 35 | #include <linux/of.h> |
404905a6 | 36 | #include <linux/acpi.h> |
72246da4 FB |
37 | |
38 | #include <linux/usb/ch9.h> | |
39 | #include <linux/usb/gadget.h> | |
f7e846f0 | 40 | #include <linux/usb/of.h> |
a45c82b8 | 41 | #include <linux/usb/otg.h> |
72246da4 | 42 | |
6462cbd5 | 43 | #include "platform_data.h" |
72246da4 FB |
44 | #include "core.h" |
45 | #include "gadget.h" | |
46 | #include "io.h" | |
47 | ||
48 | #include "debug.h" | |
49 | ||
8300dd23 FB |
50 | /* -------------------------------------------------------------------------- */ |
51 | ||
3140e8cb SAS |
52 | void dwc3_set_mode(struct dwc3 *dwc, u32 mode) |
53 | { | |
54 | u32 reg; | |
55 | ||
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); | |
60 | } | |
8300dd23 | 61 | |
72246da4 FB |
62 | /** |
63 | * dwc3_core_soft_reset - Issues core soft reset and PHY reset | |
64 | * @dwc: pointer to our context structure | |
65 | */ | |
57303488 | 66 | static int dwc3_core_soft_reset(struct dwc3 *dwc) |
72246da4 FB |
67 | { |
68 | u32 reg; | |
57303488 | 69 | int ret; |
72246da4 FB |
70 | |
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); | |
75 | ||
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); | |
80 | ||
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); | |
85 | ||
51e1e7bc FB |
86 | usb_phy_init(dwc->usb2_phy); |
87 | usb_phy_init(dwc->usb3_phy); | |
57303488 KVA |
88 | ret = phy_init(dwc->usb2_generic_phy); |
89 | if (ret < 0) | |
90 | return ret; | |
91 | ||
92 | ret = phy_init(dwc->usb3_generic_phy); | |
93 | if (ret < 0) { | |
94 | phy_exit(dwc->usb2_generic_phy); | |
95 | return ret; | |
96 | } | |
72246da4 FB |
97 | mdelay(100); |
98 | ||
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); | |
103 | ||
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); | |
108 | ||
45627ac6 PA |
109 | mdelay(100); |
110 | ||
72246da4 FB |
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); | |
57303488 KVA |
115 | |
116 | return 0; | |
72246da4 FB |
117 | } |
118 | ||
119 | /** | |
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 | |
123 | */ | |
124 | static void dwc3_free_one_event_buffer(struct dwc3 *dwc, | |
125 | struct dwc3_event_buffer *evt) | |
126 | { | |
127 | dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); | |
72246da4 FB |
128 | } |
129 | ||
130 | /** | |
1d046793 | 131 | * dwc3_alloc_one_event_buffer - Allocates one event buffer structure |
72246da4 FB |
132 | * @dwc: Pointer to our controller context structure |
133 | * @length: size of the event buffer | |
134 | * | |
1d046793 | 135 | * Returns a pointer to the allocated event buffer structure on success |
72246da4 FB |
136 | * otherwise ERR_PTR(errno). |
137 | */ | |
67d0b500 FB |
138 | static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, |
139 | unsigned length) | |
72246da4 FB |
140 | { |
141 | struct dwc3_event_buffer *evt; | |
142 | ||
380f0d28 | 143 | evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); |
72246da4 FB |
144 | if (!evt) |
145 | return ERR_PTR(-ENOMEM); | |
146 | ||
147 | evt->dwc = dwc; | |
148 | evt->length = length; | |
149 | evt->buf = dma_alloc_coherent(dwc->dev, length, | |
150 | &evt->dma, GFP_KERNEL); | |
e32672f0 | 151 | if (!evt->buf) |
72246da4 | 152 | return ERR_PTR(-ENOMEM); |
72246da4 FB |
153 | |
154 | return evt; | |
155 | } | |
156 | ||
157 | /** | |
158 | * dwc3_free_event_buffers - frees all allocated event buffers | |
159 | * @dwc: Pointer to our controller context structure | |
160 | */ | |
161 | static void dwc3_free_event_buffers(struct dwc3 *dwc) | |
162 | { | |
163 | struct dwc3_event_buffer *evt; | |
164 | int i; | |
165 | ||
9f622b2a | 166 | for (i = 0; i < dwc->num_event_buffers; i++) { |
72246da4 | 167 | evt = dwc->ev_buffs[i]; |
64b6c8a7 | 168 | if (evt) |
72246da4 | 169 | dwc3_free_one_event_buffer(dwc, evt); |
72246da4 FB |
170 | } |
171 | } | |
172 | ||
173 | /** | |
174 | * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length | |
1d046793 | 175 | * @dwc: pointer to our controller context structure |
72246da4 FB |
176 | * @length: size of event buffer |
177 | * | |
1d046793 | 178 | * Returns 0 on success otherwise negative errno. In the error case, dwc |
72246da4 FB |
179 | * may contain some buffers allocated but not all which were requested. |
180 | */ | |
41ac7b3a | 181 | static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) |
72246da4 | 182 | { |
9f622b2a | 183 | int num; |
72246da4 FB |
184 | int i; |
185 | ||
9f622b2a FB |
186 | num = DWC3_NUM_INT(dwc->hwparams.hwparams1); |
187 | dwc->num_event_buffers = num; | |
188 | ||
380f0d28 FB |
189 | dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, |
190 | GFP_KERNEL); | |
734d5a53 | 191 | if (!dwc->ev_buffs) |
457d3f21 | 192 | return -ENOMEM; |
457d3f21 | 193 | |
72246da4 FB |
194 | for (i = 0; i < num; i++) { |
195 | struct dwc3_event_buffer *evt; | |
196 | ||
197 | evt = dwc3_alloc_one_event_buffer(dwc, length); | |
198 | if (IS_ERR(evt)) { | |
199 | dev_err(dwc->dev, "can't allocate event buffer\n"); | |
200 | return PTR_ERR(evt); | |
201 | } | |
202 | dwc->ev_buffs[i] = evt; | |
203 | } | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | /** | |
209 | * dwc3_event_buffers_setup - setup our allocated event buffers | |
1d046793 | 210 | * @dwc: pointer to our controller context structure |
72246da4 FB |
211 | * |
212 | * Returns 0 on success otherwise negative errno. | |
213 | */ | |
7acd85e0 | 214 | static int dwc3_event_buffers_setup(struct dwc3 *dwc) |
72246da4 FB |
215 | { |
216 | struct dwc3_event_buffer *evt; | |
217 | int n; | |
218 | ||
9f622b2a | 219 | for (n = 0; n < dwc->num_event_buffers; n++) { |
72246da4 FB |
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, | |
223 | evt->length); | |
224 | ||
7acd85e0 PZ |
225 | evt->lpos = 0; |
226 | ||
72246da4 FB |
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), | |
68d6a01b | 232 | DWC3_GEVNTSIZ_SIZE(evt->length)); |
72246da4 FB |
233 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) | |
240 | { | |
241 | struct dwc3_event_buffer *evt; | |
242 | int n; | |
243 | ||
9f622b2a | 244 | for (n = 0; n < dwc->num_event_buffers; n++) { |
72246da4 | 245 | evt = dwc->ev_buffs[n]; |
7acd85e0 PZ |
246 | |
247 | evt->lpos = 0; | |
248 | ||
72246da4 FB |
249 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); |
250 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); | |
68d6a01b FB |
251 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), DWC3_GEVNTSIZ_INTMASK |
252 | | DWC3_GEVNTSIZ_SIZE(0)); | |
72246da4 FB |
253 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
254 | } | |
255 | } | |
256 | ||
0ffcaf37 FB |
257 | static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc) |
258 | { | |
259 | if (!dwc->has_hibernation) | |
260 | return 0; | |
261 | ||
262 | if (!dwc->nr_scratch) | |
263 | return 0; | |
264 | ||
265 | dwc->scratchbuf = kmalloc_array(dwc->nr_scratch, | |
266 | DWC3_SCRATCHBUF_SIZE, GFP_KERNEL); | |
267 | if (!dwc->scratchbuf) | |
268 | return -ENOMEM; | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static int dwc3_setup_scratch_buffers(struct dwc3 *dwc) | |
274 | { | |
275 | dma_addr_t scratch_addr; | |
276 | u32 param; | |
277 | int ret; | |
278 | ||
279 | if (!dwc->has_hibernation) | |
280 | return 0; | |
281 | ||
282 | if (!dwc->nr_scratch) | |
283 | return 0; | |
284 | ||
285 | /* should never fall here */ | |
286 | if (!WARN_ON(dwc->scratchbuf)) | |
287 | return 0; | |
288 | ||
289 | scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf, | |
290 | dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE, | |
291 | DMA_BIDIRECTIONAL); | |
292 | if (dma_mapping_error(dwc->dev, scratch_addr)) { | |
293 | dev_err(dwc->dev, "failed to map scratch buffer\n"); | |
294 | ret = -EFAULT; | |
295 | goto err0; | |
296 | } | |
297 | ||
298 | dwc->scratch_addr = scratch_addr; | |
299 | ||
300 | param = lower_32_bits(scratch_addr); | |
301 | ||
302 | ret = dwc3_send_gadget_generic_command(dwc, | |
303 | DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param); | |
304 | if (ret < 0) | |
305 | goto err1; | |
306 | ||
307 | param = upper_32_bits(scratch_addr); | |
308 | ||
309 | ret = dwc3_send_gadget_generic_command(dwc, | |
310 | DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param); | |
311 | if (ret < 0) | |
312 | goto err1; | |
313 | ||
314 | return 0; | |
315 | ||
316 | err1: | |
317 | dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch * | |
318 | DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); | |
319 | ||
320 | err0: | |
321 | return ret; | |
322 | } | |
323 | ||
324 | static void dwc3_free_scratch_buffers(struct dwc3 *dwc) | |
325 | { | |
326 | if (!dwc->has_hibernation) | |
327 | return; | |
328 | ||
329 | if (!dwc->nr_scratch) | |
330 | return; | |
331 | ||
332 | /* should never fall here */ | |
333 | if (!WARN_ON(dwc->scratchbuf)) | |
334 | return; | |
335 | ||
336 | dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch * | |
337 | DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); | |
338 | kfree(dwc->scratchbuf); | |
339 | } | |
340 | ||
789451f6 FB |
341 | static void dwc3_core_num_eps(struct dwc3 *dwc) |
342 | { | |
343 | struct dwc3_hwparams *parms = &dwc->hwparams; | |
344 | ||
345 | dwc->num_in_eps = DWC3_NUM_IN_EPS(parms); | |
346 | dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps; | |
347 | ||
348 | dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n", | |
349 | dwc->num_in_eps, dwc->num_out_eps); | |
350 | } | |
351 | ||
41ac7b3a | 352 | static void dwc3_cache_hwparams(struct dwc3 *dwc) |
26ceca97 FB |
353 | { |
354 | struct dwc3_hwparams *parms = &dwc->hwparams; | |
355 | ||
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); | |
365 | } | |
366 | ||
72246da4 FB |
367 | /** |
368 | * dwc3_core_init - Low-level initialization of DWC3 Core | |
369 | * @dwc: Pointer to our controller context structure | |
370 | * | |
371 | * Returns 0 on success otherwise negative errno. | |
372 | */ | |
41ac7b3a | 373 | static int dwc3_core_init(struct dwc3 *dwc) |
72246da4 FB |
374 | { |
375 | unsigned long timeout; | |
0ffcaf37 | 376 | u32 hwparams4 = dwc->hwparams.hwparams4; |
72246da4 FB |
377 | u32 reg; |
378 | int ret; | |
379 | ||
7650bd74 SAS |
380 | reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); |
381 | /* This should read as U3 followed by revision number */ | |
382 | if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { | |
383 | dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); | |
384 | ret = -ENODEV; | |
385 | goto err0; | |
386 | } | |
248b122b | 387 | dwc->revision = reg; |
7650bd74 | 388 | |
fa0ea13e FB |
389 | /* |
390 | * Write Linux Version Code to our GUID register so it's easy to figure | |
391 | * out which kernel version a bug was found. | |
392 | */ | |
393 | dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); | |
394 | ||
0e1e5c47 PZ |
395 | /* Handle USB2.0-only core configuration */ |
396 | if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) == | |
397 | DWC3_GHWPARAMS3_SSPHY_IFC_DIS) { | |
398 | if (dwc->maximum_speed == USB_SPEED_SUPER) | |
399 | dwc->maximum_speed = USB_SPEED_HIGH; | |
400 | } | |
401 | ||
72246da4 FB |
402 | /* issue device SoftReset too */ |
403 | timeout = jiffies + msecs_to_jiffies(500); | |
404 | dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); | |
405 | do { | |
406 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
407 | if (!(reg & DWC3_DCTL_CSFTRST)) | |
408 | break; | |
409 | ||
410 | if (time_after(jiffies, timeout)) { | |
411 | dev_err(dwc->dev, "Reset Timed Out\n"); | |
412 | ret = -ETIMEDOUT; | |
413 | goto err0; | |
414 | } | |
415 | ||
416 | cpu_relax(); | |
417 | } while (true); | |
418 | ||
57303488 KVA |
419 | ret = dwc3_core_soft_reset(dwc); |
420 | if (ret) | |
421 | goto err0; | |
58a0f23f | 422 | |
4878a028 | 423 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
3e87c42a | 424 | reg &= ~DWC3_GCTL_SCALEDOWN_MASK; |
4878a028 SAS |
425 | reg &= ~DWC3_GCTL_DISSCRAMBLE; |
426 | ||
164d7731 | 427 | switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { |
4878a028 | 428 | case DWC3_GHWPARAMS1_EN_PWROPT_CLK: |
32a4a135 FB |
429 | /** |
430 | * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an | |
431 | * issue which would cause xHCI compliance tests to fail. | |
432 | * | |
433 | * Because of that we cannot enable clock gating on such | |
434 | * configurations. | |
435 | * | |
436 | * Refers to: | |
437 | * | |
438 | * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based | |
439 | * SOF/ITP Mode Used | |
440 | */ | |
441 | if ((dwc->dr_mode == USB_DR_MODE_HOST || | |
442 | dwc->dr_mode == USB_DR_MODE_OTG) && | |
443 | (dwc->revision >= DWC3_REVISION_210A && | |
444 | dwc->revision <= DWC3_REVISION_250A)) | |
445 | reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC; | |
446 | else | |
447 | reg &= ~DWC3_GCTL_DSBLCLKGTNG; | |
4878a028 | 448 | break; |
0ffcaf37 FB |
449 | case DWC3_GHWPARAMS1_EN_PWROPT_HIB: |
450 | /* enable hibernation here */ | |
451 | dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4); | |
2eac3992 HR |
452 | |
453 | /* | |
454 | * REVISIT Enabling this bit so that host-mode hibernation | |
455 | * will work. Device-mode hibernation is not yet implemented. | |
456 | */ | |
457 | reg |= DWC3_GCTL_GBLHIBERNATIONEN; | |
0ffcaf37 | 458 | break; |
4878a028 SAS |
459 | default: |
460 | dev_dbg(dwc->dev, "No power optimization available\n"); | |
461 | } | |
462 | ||
946bd579 HR |
463 | /* check if current dwc3 is on simulation board */ |
464 | if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) { | |
465 | dev_dbg(dwc->dev, "it is on FPGA board\n"); | |
466 | dwc->is_fpga = true; | |
467 | } | |
468 | ||
4878a028 SAS |
469 | /* |
470 | * WORKAROUND: DWC3 revisions <1.90a have a bug | |
1d046793 | 471 | * where the device can fail to connect at SuperSpeed |
4878a028 | 472 | * and falls back to high-speed mode which causes |
1d046793 | 473 | * the device to enter a Connect/Disconnect loop |
4878a028 SAS |
474 | */ |
475 | if (dwc->revision < DWC3_REVISION_190A) | |
476 | reg |= DWC3_GCTL_U2RSTECN; | |
477 | ||
789451f6 FB |
478 | dwc3_core_num_eps(dwc); |
479 | ||
4878a028 SAS |
480 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
481 | ||
0ffcaf37 FB |
482 | ret = dwc3_alloc_scratch_buffers(dwc); |
483 | if (ret) | |
484 | goto err1; | |
485 | ||
486 | ret = dwc3_setup_scratch_buffers(dwc); | |
487 | if (ret) | |
488 | goto err2; | |
489 | ||
72246da4 FB |
490 | return 0; |
491 | ||
0ffcaf37 FB |
492 | err2: |
493 | dwc3_free_scratch_buffers(dwc); | |
494 | ||
495 | err1: | |
496 | usb_phy_shutdown(dwc->usb2_phy); | |
497 | usb_phy_shutdown(dwc->usb3_phy); | |
57303488 KVA |
498 | phy_exit(dwc->usb2_generic_phy); |
499 | phy_exit(dwc->usb3_generic_phy); | |
0ffcaf37 | 500 | |
72246da4 FB |
501 | err0: |
502 | return ret; | |
503 | } | |
504 | ||
505 | static void dwc3_core_exit(struct dwc3 *dwc) | |
506 | { | |
0ffcaf37 | 507 | dwc3_free_scratch_buffers(dwc); |
01b8daf7 VG |
508 | usb_phy_shutdown(dwc->usb2_phy); |
509 | usb_phy_shutdown(dwc->usb3_phy); | |
57303488 KVA |
510 | phy_exit(dwc->usb2_generic_phy); |
511 | phy_exit(dwc->usb3_generic_phy); | |
72246da4 FB |
512 | } |
513 | ||
3c9f94ac | 514 | static int dwc3_core_get_phy(struct dwc3 *dwc) |
72246da4 | 515 | { |
3c9f94ac | 516 | struct device *dev = dwc->dev; |
941ea361 | 517 | struct device_node *node = dev->of_node; |
3c9f94ac | 518 | int ret; |
72246da4 | 519 | |
5088b6f5 KVA |
520 | if (node) { |
521 | dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); | |
522 | dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); | |
bb674907 FB |
523 | } else { |
524 | dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); | |
525 | dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); | |
5088b6f5 KVA |
526 | } |
527 | ||
d105e7f8 FB |
528 | if (IS_ERR(dwc->usb2_phy)) { |
529 | ret = PTR_ERR(dwc->usb2_phy); | |
122f06e6 KVA |
530 | if (ret == -ENXIO || ret == -ENODEV) { |
531 | dwc->usb2_phy = NULL; | |
532 | } else if (ret == -EPROBE_DEFER) { | |
d105e7f8 | 533 | return ret; |
122f06e6 KVA |
534 | } else { |
535 | dev_err(dev, "no usb2 phy configured\n"); | |
536 | return ret; | |
537 | } | |
51e1e7bc FB |
538 | } |
539 | ||
d105e7f8 | 540 | if (IS_ERR(dwc->usb3_phy)) { |
315955d7 | 541 | ret = PTR_ERR(dwc->usb3_phy); |
122f06e6 KVA |
542 | if (ret == -ENXIO || ret == -ENODEV) { |
543 | dwc->usb3_phy = NULL; | |
544 | } else if (ret == -EPROBE_DEFER) { | |
d105e7f8 | 545 | return ret; |
122f06e6 KVA |
546 | } else { |
547 | dev_err(dev, "no usb3 phy configured\n"); | |
548 | return ret; | |
549 | } | |
51e1e7bc FB |
550 | } |
551 | ||
57303488 KVA |
552 | dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy"); |
553 | if (IS_ERR(dwc->usb2_generic_phy)) { | |
554 | ret = PTR_ERR(dwc->usb2_generic_phy); | |
555 | if (ret == -ENOSYS || ret == -ENODEV) { | |
556 | dwc->usb2_generic_phy = NULL; | |
557 | } else if (ret == -EPROBE_DEFER) { | |
558 | return ret; | |
559 | } else { | |
560 | dev_err(dev, "no usb2 phy configured\n"); | |
561 | return ret; | |
562 | } | |
563 | } | |
564 | ||
565 | dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy"); | |
566 | if (IS_ERR(dwc->usb3_generic_phy)) { | |
567 | ret = PTR_ERR(dwc->usb3_generic_phy); | |
568 | if (ret == -ENOSYS || ret == -ENODEV) { | |
569 | dwc->usb3_generic_phy = NULL; | |
570 | } else if (ret == -EPROBE_DEFER) { | |
571 | return ret; | |
572 | } else { | |
573 | dev_err(dev, "no usb3 phy configured\n"); | |
574 | return ret; | |
575 | } | |
576 | } | |
577 | ||
3c9f94ac FB |
578 | return 0; |
579 | } | |
580 | ||
5f94adfe FB |
581 | static int dwc3_core_init_mode(struct dwc3 *dwc) |
582 | { | |
583 | struct device *dev = dwc->dev; | |
584 | int ret; | |
585 | ||
586 | switch (dwc->dr_mode) { | |
587 | case USB_DR_MODE_PERIPHERAL: | |
588 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); | |
589 | ret = dwc3_gadget_init(dwc); | |
590 | if (ret) { | |
591 | dev_err(dev, "failed to initialize gadget\n"); | |
592 | return ret; | |
593 | } | |
594 | break; | |
595 | case USB_DR_MODE_HOST: | |
596 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); | |
597 | ret = dwc3_host_init(dwc); | |
598 | if (ret) { | |
599 | dev_err(dev, "failed to initialize host\n"); | |
600 | return ret; | |
601 | } | |
602 | break; | |
603 | case USB_DR_MODE_OTG: | |
604 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); | |
605 | ret = dwc3_host_init(dwc); | |
606 | if (ret) { | |
607 | dev_err(dev, "failed to initialize host\n"); | |
608 | return ret; | |
609 | } | |
610 | ||
611 | ret = dwc3_gadget_init(dwc); | |
612 | if (ret) { | |
613 | dev_err(dev, "failed to initialize gadget\n"); | |
614 | return ret; | |
615 | } | |
616 | break; | |
617 | default: | |
618 | dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode); | |
619 | return -EINVAL; | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | static void dwc3_core_exit_mode(struct dwc3 *dwc) | |
626 | { | |
627 | switch (dwc->dr_mode) { | |
628 | case USB_DR_MODE_PERIPHERAL: | |
629 | dwc3_gadget_exit(dwc); | |
630 | break; | |
631 | case USB_DR_MODE_HOST: | |
632 | dwc3_host_exit(dwc); | |
633 | break; | |
634 | case USB_DR_MODE_OTG: | |
635 | dwc3_host_exit(dwc); | |
636 | dwc3_gadget_exit(dwc); | |
637 | break; | |
638 | default: | |
639 | /* do nothing */ | |
640 | break; | |
641 | } | |
642 | } | |
643 | ||
3c9f94ac FB |
644 | #define DWC3_ALIGN_MASK (16 - 1) |
645 | ||
646 | static int dwc3_probe(struct platform_device *pdev) | |
647 | { | |
648 | struct device *dev = &pdev->dev; | |
649 | struct dwc3_platform_data *pdata = dev_get_platdata(dev); | |
650 | struct device_node *node = dev->of_node; | |
651 | struct resource *res; | |
652 | struct dwc3 *dwc; | |
653 | ||
b09e99ee | 654 | int ret; |
3c9f94ac FB |
655 | |
656 | void __iomem *regs; | |
657 | void *mem; | |
658 | ||
659 | mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); | |
734d5a53 | 660 | if (!mem) |
3c9f94ac | 661 | return -ENOMEM; |
734d5a53 | 662 | |
3c9f94ac FB |
663 | dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); |
664 | dwc->mem = mem; | |
665 | dwc->dev = dev; | |
666 | ||
667 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
668 | if (!res) { | |
669 | dev_err(dev, "missing IRQ\n"); | |
670 | return -ENODEV; | |
671 | } | |
672 | dwc->xhci_resources[1].start = res->start; | |
673 | dwc->xhci_resources[1].end = res->end; | |
674 | dwc->xhci_resources[1].flags = res->flags; | |
675 | dwc->xhci_resources[1].name = res->name; | |
676 | ||
677 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
678 | if (!res) { | |
679 | dev_err(dev, "missing memory resource\n"); | |
680 | return -ENODEV; | |
681 | } | |
682 | ||
f32a5e23 VG |
683 | dwc->xhci_resources[0].start = res->start; |
684 | dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + | |
685 | DWC3_XHCI_REGS_END; | |
686 | dwc->xhci_resources[0].flags = res->flags; | |
687 | dwc->xhci_resources[0].name = res->name; | |
688 | ||
689 | res->start += DWC3_GLOBALS_REGS_START; | |
690 | ||
691 | /* | |
692 | * Request memory region but exclude xHCI regs, | |
693 | * since it will be requested by the xhci-plat driver. | |
694 | */ | |
695 | regs = devm_ioremap_resource(dev, res); | |
696 | if (IS_ERR(regs)) | |
697 | return PTR_ERR(regs); | |
698 | ||
699 | dwc->regs = regs; | |
700 | dwc->regs_size = resource_size(res); | |
701 | /* | |
702 | * restore res->start back to its original value so that, | |
703 | * in case the probe is deferred, we don't end up getting error in | |
704 | * request the memory region the next time probe is called. | |
705 | */ | |
706 | res->start -= DWC3_GLOBALS_REGS_START; | |
707 | ||
3c9f94ac FB |
708 | if (node) { |
709 | dwc->maximum_speed = of_usb_get_maximum_speed(node); | |
710 | ||
711 | dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize"); | |
712 | dwc->dr_mode = of_usb_get_dr_mode(node); | |
713 | } else if (pdata) { | |
714 | dwc->maximum_speed = pdata->maximum_speed; | |
715 | ||
716 | dwc->needs_fifo_resize = pdata->tx_fifo_resize; | |
717 | dwc->dr_mode = pdata->dr_mode; | |
718 | } | |
719 | ||
720 | /* default to superspeed if no maximum_speed passed */ | |
721 | if (dwc->maximum_speed == USB_SPEED_UNKNOWN) | |
722 | dwc->maximum_speed = USB_SPEED_SUPER; | |
723 | ||
724 | ret = dwc3_core_get_phy(dwc); | |
725 | if (ret) | |
726 | return ret; | |
727 | ||
72246da4 FB |
728 | spin_lock_init(&dwc->lock); |
729 | platform_set_drvdata(pdev, dwc); | |
730 | ||
19bacdc9 HK |
731 | if (!dev->dma_mask) { |
732 | dev->dma_mask = dev->parent->dma_mask; | |
733 | dev->dma_parms = dev->parent->dma_parms; | |
734 | dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask); | |
735 | } | |
ddff14f1 | 736 | |
802ca850 CP |
737 | pm_runtime_enable(dev); |
738 | pm_runtime_get_sync(dev); | |
739 | pm_runtime_forbid(dev); | |
72246da4 | 740 | |
4fd24483 KVA |
741 | dwc3_cache_hwparams(dwc); |
742 | ||
3921426b FB |
743 | ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); |
744 | if (ret) { | |
745 | dev_err(dwc->dev, "failed to allocate event buffers\n"); | |
746 | ret = -ENOMEM; | |
747 | goto err0; | |
748 | } | |
749 | ||
32a4a135 FB |
750 | if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) |
751 | dwc->dr_mode = USB_DR_MODE_HOST; | |
752 | else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) | |
753 | dwc->dr_mode = USB_DR_MODE_PERIPHERAL; | |
754 | ||
755 | if (dwc->dr_mode == USB_DR_MODE_UNKNOWN) | |
756 | dwc->dr_mode = USB_DR_MODE_OTG; | |
757 | ||
72246da4 FB |
758 | ret = dwc3_core_init(dwc); |
759 | if (ret) { | |
802ca850 | 760 | dev_err(dev, "failed to initialize core\n"); |
3921426b | 761 | goto err0; |
72246da4 FB |
762 | } |
763 | ||
3088f108 KVA |
764 | usb_phy_set_suspend(dwc->usb2_phy, 0); |
765 | usb_phy_set_suspend(dwc->usb3_phy, 0); | |
57303488 KVA |
766 | ret = phy_power_on(dwc->usb2_generic_phy); |
767 | if (ret < 0) | |
768 | goto err1; | |
769 | ||
770 | ret = phy_power_on(dwc->usb3_generic_phy); | |
771 | if (ret < 0) | |
772 | goto err_usb2phy_power; | |
3088f108 | 773 | |
f122d33e FB |
774 | ret = dwc3_event_buffers_setup(dwc); |
775 | if (ret) { | |
776 | dev_err(dwc->dev, "failed to setup event buffers\n"); | |
57303488 | 777 | goto err_usb3phy_power; |
f122d33e FB |
778 | } |
779 | ||
5f94adfe FB |
780 | ret = dwc3_core_init_mode(dwc); |
781 | if (ret) | |
f122d33e | 782 | goto err2; |
72246da4 FB |
783 | |
784 | ret = dwc3_debugfs_init(dwc); | |
785 | if (ret) { | |
802ca850 | 786 | dev_err(dev, "failed to initialize debugfs\n"); |
f122d33e | 787 | goto err3; |
72246da4 FB |
788 | } |
789 | ||
802ca850 | 790 | pm_runtime_allow(dev); |
72246da4 FB |
791 | |
792 | return 0; | |
793 | ||
f122d33e | 794 | err3: |
5f94adfe | 795 | dwc3_core_exit_mode(dwc); |
72246da4 | 796 | |
f122d33e FB |
797 | err2: |
798 | dwc3_event_buffers_cleanup(dwc); | |
799 | ||
57303488 KVA |
800 | err_usb3phy_power: |
801 | phy_power_off(dwc->usb3_generic_phy); | |
802 | ||
803 | err_usb2phy_power: | |
804 | phy_power_off(dwc->usb2_generic_phy); | |
805 | ||
72246da4 | 806 | err1: |
501fae51 KVA |
807 | usb_phy_set_suspend(dwc->usb2_phy, 1); |
808 | usb_phy_set_suspend(dwc->usb3_phy, 1); | |
802ca850 | 809 | dwc3_core_exit(dwc); |
72246da4 | 810 | |
3921426b FB |
811 | err0: |
812 | dwc3_free_event_buffers(dwc); | |
813 | ||
72246da4 FB |
814 | return ret; |
815 | } | |
816 | ||
fb4e98ab | 817 | static int dwc3_remove(struct platform_device *pdev) |
72246da4 | 818 | { |
72246da4 | 819 | struct dwc3 *dwc = platform_get_drvdata(pdev); |
72246da4 | 820 | |
dc99f16f FB |
821 | dwc3_debugfs_exit(dwc); |
822 | dwc3_core_exit_mode(dwc); | |
823 | dwc3_event_buffers_cleanup(dwc); | |
824 | dwc3_free_event_buffers(dwc); | |
825 | ||
8ba007a9 KVA |
826 | usb_phy_set_suspend(dwc->usb2_phy, 1); |
827 | usb_phy_set_suspend(dwc->usb3_phy, 1); | |
57303488 KVA |
828 | phy_power_off(dwc->usb2_generic_phy); |
829 | phy_power_off(dwc->usb3_generic_phy); | |
8ba007a9 | 830 | |
72246da4 | 831 | dwc3_core_exit(dwc); |
72246da4 | 832 | |
16b972a5 | 833 | pm_runtime_put_sync(&pdev->dev); |
72246da4 FB |
834 | pm_runtime_disable(&pdev->dev); |
835 | ||
72246da4 FB |
836 | return 0; |
837 | } | |
838 | ||
19fda7cd | 839 | #ifdef CONFIG_PM_SLEEP |
7415f17c FB |
840 | static int dwc3_suspend(struct device *dev) |
841 | { | |
842 | struct dwc3 *dwc = dev_get_drvdata(dev); | |
843 | unsigned long flags; | |
844 | ||
845 | spin_lock_irqsave(&dwc->lock, flags); | |
846 | ||
a45c82b8 RK |
847 | switch (dwc->dr_mode) { |
848 | case USB_DR_MODE_PERIPHERAL: | |
849 | case USB_DR_MODE_OTG: | |
7415f17c FB |
850 | dwc3_gadget_suspend(dwc); |
851 | /* FALLTHROUGH */ | |
a45c82b8 | 852 | case USB_DR_MODE_HOST: |
7415f17c | 853 | default: |
0b0231aa | 854 | dwc3_event_buffers_cleanup(dwc); |
7415f17c FB |
855 | break; |
856 | } | |
857 | ||
858 | dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL); | |
859 | spin_unlock_irqrestore(&dwc->lock, flags); | |
860 | ||
861 | usb_phy_shutdown(dwc->usb3_phy); | |
862 | usb_phy_shutdown(dwc->usb2_phy); | |
57303488 KVA |
863 | phy_exit(dwc->usb2_generic_phy); |
864 | phy_exit(dwc->usb3_generic_phy); | |
7415f17c FB |
865 | |
866 | return 0; | |
867 | } | |
868 | ||
869 | static int dwc3_resume(struct device *dev) | |
870 | { | |
871 | struct dwc3 *dwc = dev_get_drvdata(dev); | |
872 | unsigned long flags; | |
57303488 | 873 | int ret; |
7415f17c FB |
874 | |
875 | usb_phy_init(dwc->usb3_phy); | |
876 | usb_phy_init(dwc->usb2_phy); | |
57303488 KVA |
877 | ret = phy_init(dwc->usb2_generic_phy); |
878 | if (ret < 0) | |
879 | return ret; | |
880 | ||
881 | ret = phy_init(dwc->usb3_generic_phy); | |
882 | if (ret < 0) | |
883 | goto err_usb2phy_init; | |
7415f17c FB |
884 | |
885 | spin_lock_irqsave(&dwc->lock, flags); | |
886 | ||
0b0231aa | 887 | dwc3_event_buffers_setup(dwc); |
7415f17c FB |
888 | dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl); |
889 | ||
a45c82b8 RK |
890 | switch (dwc->dr_mode) { |
891 | case USB_DR_MODE_PERIPHERAL: | |
892 | case USB_DR_MODE_OTG: | |
7415f17c FB |
893 | dwc3_gadget_resume(dwc); |
894 | /* FALLTHROUGH */ | |
a45c82b8 | 895 | case USB_DR_MODE_HOST: |
7415f17c FB |
896 | default: |
897 | /* do nothing */ | |
898 | break; | |
899 | } | |
900 | ||
901 | spin_unlock_irqrestore(&dwc->lock, flags); | |
902 | ||
903 | pm_runtime_disable(dev); | |
904 | pm_runtime_set_active(dev); | |
905 | pm_runtime_enable(dev); | |
906 | ||
907 | return 0; | |
57303488 KVA |
908 | |
909 | err_usb2phy_init: | |
910 | phy_exit(dwc->usb2_generic_phy); | |
911 | ||
912 | return ret; | |
7415f17c FB |
913 | } |
914 | ||
915 | static const struct dev_pm_ops dwc3_dev_pm_ops = { | |
7415f17c FB |
916 | SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) |
917 | }; | |
918 | ||
919 | #define DWC3_PM_OPS &(dwc3_dev_pm_ops) | |
920 | #else | |
921 | #define DWC3_PM_OPS NULL | |
922 | #endif | |
923 | ||
5088b6f5 KVA |
924 | #ifdef CONFIG_OF |
925 | static const struct of_device_id of_dwc3_match[] = { | |
22a5aa17 FB |
926 | { |
927 | .compatible = "snps,dwc3" | |
928 | }, | |
5088b6f5 KVA |
929 | { |
930 | .compatible = "synopsys,dwc3" | |
931 | }, | |
932 | { }, | |
933 | }; | |
934 | MODULE_DEVICE_TABLE(of, of_dwc3_match); | |
935 | #endif | |
936 | ||
404905a6 HK |
937 | #ifdef CONFIG_ACPI |
938 | ||
939 | #define ACPI_ID_INTEL_BSW "808622B7" | |
940 | ||
941 | static const struct acpi_device_id dwc3_acpi_match[] = { | |
942 | { ACPI_ID_INTEL_BSW, 0 }, | |
943 | { }, | |
944 | }; | |
945 | MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match); | |
946 | #endif | |
947 | ||
72246da4 FB |
948 | static struct platform_driver dwc3_driver = { |
949 | .probe = dwc3_probe, | |
7690417d | 950 | .remove = dwc3_remove, |
72246da4 FB |
951 | .driver = { |
952 | .name = "dwc3", | |
5088b6f5 | 953 | .of_match_table = of_match_ptr(of_dwc3_match), |
404905a6 | 954 | .acpi_match_table = ACPI_PTR(dwc3_acpi_match), |
7415f17c | 955 | .pm = DWC3_PM_OPS, |
72246da4 | 956 | }, |
72246da4 FB |
957 | }; |
958 | ||
b1116dcc TK |
959 | module_platform_driver(dwc3_driver); |
960 | ||
7ae4fc4d | 961 | MODULE_ALIAS("platform:dwc3"); |
72246da4 | 962 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |
5945f789 | 963 | MODULE_LICENSE("GPL v2"); |
72246da4 | 964 | MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); |