1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /*
3 * Copyright (C) 2004-2016 Synopsys, Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The names of the above-listed copyright holders may not be used
15 * to endorse or promote products derived from this software without
16 * specific prior written permission.
17 *
18 * ALTERNATIVELY, this software may be distributed under the terms of the
19 * GNU General Public License ("GPL") as published by the Free Software
20 * Foundation; either version 2 of the License, or (at your option) any
21 * later version.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
24 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
25 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/of_device.h>
39
40 #include "core.h"
41
dwc2_set_bcm_params(struct dwc2_hsotg * hsotg)42 static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
43 {
44 struct dwc2_core_params *p = &hsotg->params;
45
46 p->host_rx_fifo_size = 774;
47 p->max_transfer_size = 65535;
48 p->max_packet_count = 511;
49 p->ahbcfg = 0x10;
50 }
51
dwc2_set_his_params(struct dwc2_hsotg * hsotg)52 static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
53 {
54 struct dwc2_core_params *p = &hsotg->params;
55
56 p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
57 p->speed = DWC2_SPEED_PARAM_HIGH;
58 p->host_rx_fifo_size = 512;
59 p->host_nperio_tx_fifo_size = 512;
60 p->host_perio_tx_fifo_size = 512;
61 p->max_transfer_size = 65535;
62 p->max_packet_count = 511;
63 p->host_channels = 16;
64 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
65 p->phy_utmi_width = 8;
66 p->i2c_enable = false;
67 p->reload_ctl = false;
68 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
69 GAHBCFG_HBSTLEN_SHIFT;
70 p->change_speed_quirk = true;
71 p->power_down = false;
72 }
73
dwc2_set_s3c6400_params(struct dwc2_hsotg * hsotg)74 static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
75 {
76 struct dwc2_core_params *p = &hsotg->params;
77
78 p->power_down = 0;
79 p->phy_utmi_width = 8;
80 }
81
dwc2_set_rk_params(struct dwc2_hsotg * hsotg)82 static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
83 {
84 struct dwc2_core_params *p = &hsotg->params;
85
86 p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
87 p->host_rx_fifo_size = 525;
88 p->host_nperio_tx_fifo_size = 128;
89 p->host_perio_tx_fifo_size = 256;
90 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
91 GAHBCFG_HBSTLEN_SHIFT;
92 p->power_down = 0;
93 }
94
dwc2_set_ltq_params(struct dwc2_hsotg * hsotg)95 static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)
96 {
97 struct dwc2_core_params *p = &hsotg->params;
98
99 p->otg_cap = 2;
100 p->host_rx_fifo_size = 288;
101 p->host_nperio_tx_fifo_size = 128;
102 p->host_perio_tx_fifo_size = 96;
103 p->max_transfer_size = 65535;
104 p->max_packet_count = 511;
105 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
106 GAHBCFG_HBSTLEN_SHIFT;
107 }
108
dwc2_set_amlogic_params(struct dwc2_hsotg * hsotg)109 static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
110 {
111 struct dwc2_core_params *p = &hsotg->params;
112
113 p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
114 p->speed = DWC2_SPEED_PARAM_HIGH;
115 p->host_rx_fifo_size = 512;
116 p->host_nperio_tx_fifo_size = 500;
117 p->host_perio_tx_fifo_size = 500;
118 p->host_channels = 16;
119 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
120 p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 <<
121 GAHBCFG_HBSTLEN_SHIFT;
122 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
123 }
124
dwc2_set_amlogic_g12a_params(struct dwc2_hsotg * hsotg)125 static void dwc2_set_amlogic_g12a_params(struct dwc2_hsotg *hsotg)
126 {
127 struct dwc2_core_params *p = &hsotg->params;
128
129 p->lpm = false;
130 p->lpm_clock_gating = false;
131 p->besl = false;
132 p->hird_threshold_en = false;
133 }
134
dwc2_set_amcc_params(struct dwc2_hsotg * hsotg)135 static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
136 {
137 struct dwc2_core_params *p = &hsotg->params;
138
139 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
140 }
141
dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg * hsotg)142 static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
143 {
144 struct dwc2_core_params *p = &hsotg->params;
145
146 p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
147 p->speed = DWC2_SPEED_PARAM_FULL;
148 p->host_rx_fifo_size = 128;
149 p->host_nperio_tx_fifo_size = 96;
150 p->host_perio_tx_fifo_size = 96;
151 p->max_packet_count = 256;
152 p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
153 p->i2c_enable = false;
154 p->activate_stm_fs_transceiver = true;
155 }
156
dwc2_set_stm32f7_hsotg_params(struct dwc2_hsotg * hsotg)157 static void dwc2_set_stm32f7_hsotg_params(struct dwc2_hsotg *hsotg)
158 {
159 struct dwc2_core_params *p = &hsotg->params;
160
161 p->host_rx_fifo_size = 622;
162 p->host_nperio_tx_fifo_size = 128;
163 p->host_perio_tx_fifo_size = 256;
164 }
165
166 const struct of_device_id dwc2_of_match_table[] = {
167 { .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
168 { .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
169 { .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
170 { .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
171 { .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
172 { .compatible = "snps,dwc2" },
173 { .compatible = "samsung,s3c6400-hsotg",
174 .data = dwc2_set_s3c6400_params },
175 { .compatible = "amlogic,meson8-usb",
176 .data = dwc2_set_amlogic_params },
177 { .compatible = "amlogic,meson8b-usb",
178 .data = dwc2_set_amlogic_params },
179 { .compatible = "amlogic,meson-gxbb-usb",
180 .data = dwc2_set_amlogic_params },
181 { .compatible = "amlogic,meson-g12a-usb",
182 .data = dwc2_set_amlogic_g12a_params },
183 { .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
184 { .compatible = "st,stm32f4x9-fsotg",
185 .data = dwc2_set_stm32f4x9_fsotg_params },
186 { .compatible = "st,stm32f4x9-hsotg" },
187 { .compatible = "st,stm32f7-hsotg",
188 .data = dwc2_set_stm32f7_hsotg_params },
189 {},
190 };
191 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
192
dwc2_set_param_otg_cap(struct dwc2_hsotg * hsotg)193 static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
194 {
195 u8 val;
196
197 switch (hsotg->hw_params.op_mode) {
198 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
199 val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
200 break;
201 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
202 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
203 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
204 val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
205 break;
206 default:
207 val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
208 break;
209 }
210
211 hsotg->params.otg_cap = val;
212 }
213
dwc2_set_param_phy_type(struct dwc2_hsotg * hsotg)214 static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
215 {
216 int val;
217 u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
218
219 val = DWC2_PHY_TYPE_PARAM_FS;
220 if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
221 if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
222 hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
223 val = DWC2_PHY_TYPE_PARAM_UTMI;
224 else
225 val = DWC2_PHY_TYPE_PARAM_ULPI;
226 }
227
228 if (dwc2_is_fs_iot(hsotg))
229 hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
230
231 hsotg->params.phy_type = val;
232 }
233
dwc2_set_param_speed(struct dwc2_hsotg * hsotg)234 static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
235 {
236 int val;
237
238 val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
239 DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
240
241 if (dwc2_is_fs_iot(hsotg))
242 val = DWC2_SPEED_PARAM_FULL;
243
244 if (dwc2_is_hs_iot(hsotg))
245 val = DWC2_SPEED_PARAM_HIGH;
246
247 hsotg->params.speed = val;
248 }
249
dwc2_set_param_phy_utmi_width(struct dwc2_hsotg * hsotg)250 static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
251 {
252 int val;
253
254 val = (hsotg->hw_params.utmi_phy_data_width ==
255 GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
256
257 if (hsotg->phy) {
258 /*
259 * If using the generic PHY framework, check if the PHY bus
260 * width is 8-bit and set the phyif appropriately.
261 */
262 if (phy_get_bus_width(hsotg->phy) == 8)
263 val = 8;
264 }
265
266 hsotg->params.phy_utmi_width = val;
267 }
268
dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg * hsotg)269 static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
270 {
271 struct dwc2_core_params *p = &hsotg->params;
272 int depth_average;
273 int fifo_count;
274 int i;
275
276 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
277
278 memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
279 depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
280 for (i = 1; i <= fifo_count; i++)
281 p->g_tx_fifo_size[i] = depth_average;
282 }
283
dwc2_set_param_power_down(struct dwc2_hsotg * hsotg)284 static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
285 {
286 int val;
287
288 if (hsotg->hw_params.hibernation)
289 val = 2;
290 else if (hsotg->hw_params.power_optimized)
291 val = 1;
292 else
293 val = 0;
294
295 hsotg->params.power_down = val;
296 }
297
dwc2_set_param_lpm(struct dwc2_hsotg * hsotg)298 static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
299 {
300 struct dwc2_core_params *p = &hsotg->params;
301
302 p->lpm = hsotg->hw_params.lpm_mode;
303 if (p->lpm) {
304 p->lpm_clock_gating = true;
305 p->besl = true;
306 p->hird_threshold_en = true;
307 p->hird_threshold = 4;
308 } else {
309 p->lpm_clock_gating = false;
310 p->besl = false;
311 p->hird_threshold_en = false;
312 }
313 }
314
315 /**
316 * dwc2_set_default_params() - Set all core parameters to their
317 * auto-detected default values.
318 *
319 * @hsotg: Programming view of the DWC_otg controller
320 *
321 */
dwc2_set_default_params(struct dwc2_hsotg * hsotg)322 static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
323 {
324 struct dwc2_hw_params *hw = &hsotg->hw_params;
325 struct dwc2_core_params *p = &hsotg->params;
326 bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
327
328 dwc2_set_param_otg_cap(hsotg);
329 dwc2_set_param_phy_type(hsotg);
330 dwc2_set_param_speed(hsotg);
331 dwc2_set_param_phy_utmi_width(hsotg);
332 dwc2_set_param_power_down(hsotg);
333 dwc2_set_param_lpm(hsotg);
334 p->phy_ulpi_ddr = false;
335 p->phy_ulpi_ext_vbus = false;
336
337 p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
338 p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
339 p->i2c_enable = hw->i2c_enable;
340 p->acg_enable = hw->acg_enable;
341 p->ulpi_fs_ls = false;
342 p->ts_dline = false;
343 p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
344 p->uframe_sched = true;
345 p->external_id_pin_ctl = false;
346 p->ipg_isoc_en = false;
347 p->service_interval = false;
348 p->max_packet_count = hw->max_packet_count;
349 p->max_transfer_size = hw->max_transfer_size;
350 p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
351 p->ref_clk_per = 33333;
352 p->sof_cnt_wkup_alert = 100;
353
354 if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
355 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
356 p->host_dma = dma_capable;
357 p->dma_desc_enable = false;
358 p->dma_desc_fs_enable = false;
359 p->host_support_fs_ls_low_power = false;
360 p->host_ls_low_power_phy_clk = false;
361 p->host_channels = hw->host_channels;
362 p->host_rx_fifo_size = hw->rx_fifo_size;
363 p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
364 p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
365 }
366
367 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
368 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
369 p->g_dma = dma_capable;
370 p->g_dma_desc = hw->dma_desc_enable;
371
372 /*
373 * The values for g_rx_fifo_size (2048) and
374 * g_np_tx_fifo_size (1024) come from the legacy s3c
375 * gadget driver. These defaults have been hard-coded
376 * for some time so many platforms depend on these
377 * values. Leave them as defaults for now and only
378 * auto-detect if the hardware does not support the
379 * default.
380 */
381 p->g_rx_fifo_size = 2048;
382 p->g_np_tx_fifo_size = 1024;
383 dwc2_set_param_tx_fifo_sizes(hsotg);
384 }
385 }
386
387 /**
388 * dwc2_get_device_properties() - Read in device properties.
389 *
390 * @hsotg: Programming view of the DWC_otg controller
391 *
392 * Read in the device properties and adjust core parameters if needed.
393 */
dwc2_get_device_properties(struct dwc2_hsotg * hsotg)394 static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
395 {
396 struct dwc2_core_params *p = &hsotg->params;
397 int num;
398
399 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
400 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
401 device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
402 &p->g_rx_fifo_size);
403
404 device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
405 &p->g_np_tx_fifo_size);
406
407 num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
408 if (num > 0) {
409 num = min(num, 15);
410 memset(p->g_tx_fifo_size, 0,
411 sizeof(p->g_tx_fifo_size));
412 device_property_read_u32_array(hsotg->dev,
413 "g-tx-fifo-size",
414 &p->g_tx_fifo_size[1],
415 num);
416 }
417 }
418
419 if (of_find_property(hsotg->dev->of_node, "disable-over-current", NULL))
420 p->oc_disable = true;
421 }
422
dwc2_check_param_otg_cap(struct dwc2_hsotg * hsotg)423 static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
424 {
425 int valid = 1;
426
427 switch (hsotg->params.otg_cap) {
428 case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
429 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
430 valid = 0;
431 break;
432 case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
433 switch (hsotg->hw_params.op_mode) {
434 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
435 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
436 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
437 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
438 break;
439 default:
440 valid = 0;
441 break;
442 }
443 break;
444 case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
445 /* always valid */
446 break;
447 default:
448 valid = 0;
449 break;
450 }
451
452 if (!valid)
453 dwc2_set_param_otg_cap(hsotg);
454 }
455
dwc2_check_param_phy_type(struct dwc2_hsotg * hsotg)456 static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
457 {
458 int valid = 0;
459 u32 hs_phy_type;
460 u32 fs_phy_type;
461
462 hs_phy_type = hsotg->hw_params.hs_phy_type;
463 fs_phy_type = hsotg->hw_params.fs_phy_type;
464
465 switch (hsotg->params.phy_type) {
466 case DWC2_PHY_TYPE_PARAM_FS:
467 if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
468 valid = 1;
469 break;
470 case DWC2_PHY_TYPE_PARAM_UTMI:
471 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
472 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
473 valid = 1;
474 break;
475 case DWC2_PHY_TYPE_PARAM_ULPI:
476 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
477 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
478 valid = 1;
479 break;
480 default:
481 break;
482 }
483
484 if (!valid)
485 dwc2_set_param_phy_type(hsotg);
486 }
487
dwc2_check_param_speed(struct dwc2_hsotg * hsotg)488 static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
489 {
490 int valid = 1;
491 int phy_type = hsotg->params.phy_type;
492 int speed = hsotg->params.speed;
493
494 switch (speed) {
495 case DWC2_SPEED_PARAM_HIGH:
496 if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
497 (phy_type == DWC2_PHY_TYPE_PARAM_FS))
498 valid = 0;
499 break;
500 case DWC2_SPEED_PARAM_FULL:
501 case DWC2_SPEED_PARAM_LOW:
502 break;
503 default:
504 valid = 0;
505 break;
506 }
507
508 if (!valid)
509 dwc2_set_param_speed(hsotg);
510 }
511
dwc2_check_param_phy_utmi_width(struct dwc2_hsotg * hsotg)512 static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
513 {
514 int valid = 0;
515 int param = hsotg->params.phy_utmi_width;
516 int width = hsotg->hw_params.utmi_phy_data_width;
517
518 switch (width) {
519 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
520 valid = (param == 8);
521 break;
522 case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
523 valid = (param == 16);
524 break;
525 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
526 valid = (param == 8 || param == 16);
527 break;
528 }
529
530 if (!valid)
531 dwc2_set_param_phy_utmi_width(hsotg);
532 }
533
dwc2_check_param_power_down(struct dwc2_hsotg * hsotg)534 static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
535 {
536 int param = hsotg->params.power_down;
537
538 switch (param) {
539 case DWC2_POWER_DOWN_PARAM_NONE:
540 break;
541 case DWC2_POWER_DOWN_PARAM_PARTIAL:
542 if (hsotg->hw_params.power_optimized)
543 break;
544 dev_dbg(hsotg->dev,
545 "Partial power down isn't supported by HW\n");
546 param = DWC2_POWER_DOWN_PARAM_NONE;
547 break;
548 case DWC2_POWER_DOWN_PARAM_HIBERNATION:
549 if (hsotg->hw_params.hibernation)
550 break;
551 dev_dbg(hsotg->dev,
552 "Hibernation isn't supported by HW\n");
553 param = DWC2_POWER_DOWN_PARAM_NONE;
554 break;
555 default:
556 dev_err(hsotg->dev,
557 "%s: Invalid parameter power_down=%d\n",
558 __func__, param);
559 param = DWC2_POWER_DOWN_PARAM_NONE;
560 break;
561 }
562
563 hsotg->params.power_down = param;
564 }
565
dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg * hsotg)566 static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
567 {
568 int fifo_count;
569 int fifo;
570 int min;
571 u32 total = 0;
572 u32 dptxfszn;
573
574 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
575 min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
576
577 for (fifo = 1; fifo <= fifo_count; fifo++)
578 total += hsotg->params.g_tx_fifo_size[fifo];
579
580 if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
581 dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
582 __func__);
583 dwc2_set_param_tx_fifo_sizes(hsotg);
584 }
585
586 for (fifo = 1; fifo <= fifo_count; fifo++) {
587 dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
588
589 if (hsotg->params.g_tx_fifo_size[fifo] < min ||
590 hsotg->params.g_tx_fifo_size[fifo] > dptxfszn) {
591 dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
592 __func__, fifo,
593 hsotg->params.g_tx_fifo_size[fifo]);
594 hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
595 }
596 }
597 }
598
599 #define CHECK_RANGE(_param, _min, _max, _def) do { \
600 if ((int)(hsotg->params._param) < (_min) || \
601 (hsotg->params._param) > (_max)) { \
602 dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
603 __func__, #_param, hsotg->params._param); \
604 hsotg->params._param = (_def); \
605 } \
606 } while (0)
607
608 #define CHECK_BOOL(_param, _check) do { \
609 if (hsotg->params._param && !(_check)) { \
610 dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
611 __func__, #_param, hsotg->params._param); \
612 hsotg->params._param = false; \
613 } \
614 } while (0)
615
dwc2_check_params(struct dwc2_hsotg * hsotg)616 static void dwc2_check_params(struct dwc2_hsotg *hsotg)
617 {
618 struct dwc2_hw_params *hw = &hsotg->hw_params;
619 struct dwc2_core_params *p = &hsotg->params;
620 bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
621
622 dwc2_check_param_otg_cap(hsotg);
623 dwc2_check_param_phy_type(hsotg);
624 dwc2_check_param_speed(hsotg);
625 dwc2_check_param_phy_utmi_width(hsotg);
626 dwc2_check_param_power_down(hsotg);
627 CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
628 CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
629 CHECK_BOOL(i2c_enable, hw->i2c_enable);
630 CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
631 CHECK_BOOL(acg_enable, hw->acg_enable);
632 CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
633 CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
634 CHECK_BOOL(lpm, hw->lpm_mode);
635 CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
636 CHECK_BOOL(besl, hsotg->params.lpm);
637 CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
638 CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
639 CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
640 CHECK_BOOL(service_interval, hw->service_interval_mode);
641 CHECK_RANGE(max_packet_count,
642 15, hw->max_packet_count,
643 hw->max_packet_count);
644 CHECK_RANGE(max_transfer_size,
645 2047, hw->max_transfer_size,
646 hw->max_transfer_size);
647
648 if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
649 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
650 CHECK_BOOL(host_dma, dma_capable);
651 CHECK_BOOL(dma_desc_enable, p->host_dma);
652 CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
653 CHECK_BOOL(host_ls_low_power_phy_clk,
654 p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
655 CHECK_RANGE(host_channels,
656 1, hw->host_channels,
657 hw->host_channels);
658 CHECK_RANGE(host_rx_fifo_size,
659 16, hw->rx_fifo_size,
660 hw->rx_fifo_size);
661 CHECK_RANGE(host_nperio_tx_fifo_size,
662 16, hw->host_nperio_tx_fifo_size,
663 hw->host_nperio_tx_fifo_size);
664 CHECK_RANGE(host_perio_tx_fifo_size,
665 16, hw->host_perio_tx_fifo_size,
666 hw->host_perio_tx_fifo_size);
667 }
668
669 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
670 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
671 CHECK_BOOL(g_dma, dma_capable);
672 CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
673 CHECK_RANGE(g_rx_fifo_size,
674 16, hw->rx_fifo_size,
675 hw->rx_fifo_size);
676 CHECK_RANGE(g_np_tx_fifo_size,
677 16, hw->dev_nperio_tx_fifo_size,
678 hw->dev_nperio_tx_fifo_size);
679 dwc2_check_param_tx_fifo_sizes(hsotg);
680 }
681 }
682
683 /*
684 * Gets host hardware parameters. Forces host mode if not currently in
685 * host mode. Should be called immediately after a core soft reset in
686 * order to get the reset values.
687 */
dwc2_get_host_hwparams(struct dwc2_hsotg * hsotg)688 static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
689 {
690 struct dwc2_hw_params *hw = &hsotg->hw_params;
691 u32 gnptxfsiz;
692 u32 hptxfsiz;
693
694 if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
695 return;
696
697 dwc2_force_mode(hsotg, true);
698
699 gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
700 hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
701
702 hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
703 FIFOSIZE_DEPTH_SHIFT;
704 hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
705 FIFOSIZE_DEPTH_SHIFT;
706 }
707
708 /*
709 * Gets device hardware parameters. Forces device mode if not
710 * currently in device mode. Should be called immediately after a core
711 * soft reset in order to get the reset values.
712 */
dwc2_get_dev_hwparams(struct dwc2_hsotg * hsotg)713 static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
714 {
715 struct dwc2_hw_params *hw = &hsotg->hw_params;
716 u32 gnptxfsiz;
717 int fifo, fifo_count;
718
719 if (hsotg->dr_mode == USB_DR_MODE_HOST)
720 return;
721
722 dwc2_force_mode(hsotg, false);
723
724 gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
725
726 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
727
728 for (fifo = 1; fifo <= fifo_count; fifo++) {
729 hw->g_tx_fifo_size[fifo] =
730 (dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
731 FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
732 }
733
734 hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
735 FIFOSIZE_DEPTH_SHIFT;
736 }
737
738 /**
739 * During device initialization, read various hardware configuration
740 * registers and interpret the contents.
741 *
742 * @hsotg: Programming view of the DWC_otg controller
743 *
744 */
dwc2_get_hwparams(struct dwc2_hsotg * hsotg)745 int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
746 {
747 struct dwc2_hw_params *hw = &hsotg->hw_params;
748 unsigned int width;
749 u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
750 u32 grxfsiz;
751
752 /*
753 * Attempt to ensure this device is really a DWC_otg Controller.
754 * Read and verify the GSNPSID register contents. The value should be
755 * 0x45f4xxxx, 0x5531xxxx or 0x5532xxxx
756 */
757
758 hw->snpsid = dwc2_readl(hsotg, GSNPSID);
759 if ((hw->snpsid & GSNPSID_ID_MASK) != DWC2_OTG_ID &&
760 (hw->snpsid & GSNPSID_ID_MASK) != DWC2_FS_IOT_ID &&
761 (hw->snpsid & GSNPSID_ID_MASK) != DWC2_HS_IOT_ID) {
762 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
763 hw->snpsid);
764 return -ENODEV;
765 }
766
767 dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
768 hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
769 hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
770
771 hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
772 hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
773 hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
774 hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
775 grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
776
777 /* hwcfg1 */
778 hw->dev_ep_dirs = hwcfg1;
779
780 /* hwcfg2 */
781 hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
782 GHWCFG2_OP_MODE_SHIFT;
783 hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
784 GHWCFG2_ARCHITECTURE_SHIFT;
785 hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
786 hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
787 GHWCFG2_NUM_HOST_CHAN_SHIFT);
788 hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
789 GHWCFG2_HS_PHY_TYPE_SHIFT;
790 hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
791 GHWCFG2_FS_PHY_TYPE_SHIFT;
792 hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
793 GHWCFG2_NUM_DEV_EP_SHIFT;
794 hw->nperio_tx_q_depth =
795 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
796 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
797 hw->host_perio_tx_q_depth =
798 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
799 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
800 hw->dev_token_q_depth =
801 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
802 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
803
804 /* hwcfg3 */
805 width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
806 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
807 hw->max_transfer_size = (1 << (width + 11)) - 1;
808 width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
809 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
810 hw->max_packet_count = (1 << (width + 4)) - 1;
811 hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
812 hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
813 GHWCFG3_DFIFO_DEPTH_SHIFT;
814 hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
815
816 /* hwcfg4 */
817 hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
818 hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
819 GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
820 hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
821 GHWCFG4_NUM_IN_EPS_SHIFT;
822 hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
823 hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
824 hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
825 hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
826 GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
827 hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
828 hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
829 hw->service_interval_mode = !!(hwcfg4 &
830 GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
831
832 /* fifo sizes */
833 hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
834 GRXFSIZ_DEPTH_SHIFT;
835 /*
836 * Host specific hardware parameters. Reading these parameters
837 * requires the controller to be in host mode. The mode will
838 * be forced, if necessary, to read these values.
839 */
840 dwc2_get_host_hwparams(hsotg);
841 dwc2_get_dev_hwparams(hsotg);
842
843 return 0;
844 }
845
dwc2_init_params(struct dwc2_hsotg * hsotg)846 int dwc2_init_params(struct dwc2_hsotg *hsotg)
847 {
848 const struct of_device_id *match;
849 void (*set_params)(void *data);
850
851 dwc2_set_default_params(hsotg);
852 dwc2_get_device_properties(hsotg);
853
854 match = of_match_device(dwc2_of_match_table, hsotg->dev);
855 if (match && match->data) {
856 set_params = match->data;
857 set_params(hsotg);
858 }
859
860 dwc2_check_params(hsotg);
861
862 return 0;
863 }
864
