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Merge tag 'usb-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
[linux-block.git] / drivers / usb / dwc2 / params.c
CommitLineData
5fd54ace 1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
323230ef
JY		 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
7de1debc
JY		 42static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
43{
44 struct dwc2_core_params *p = &hsotg->params;
323230ef 45
7de1debc 46 p->host_rx_fifo_size = 774;
7de1debc
JY		 47 p->max_transfer_size = 65535;
48 p->max_packet_count = 511;
7de1debc 49 p->ahbcfg = 0x10;
7de1debc 50}
323230ef 51
7de1debc
JY		 52static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
53{
54 struct dwc2_core_params *p = &hsotg->params;
323230ef 55
7de1debc
JY		 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;
7de1debc
JY		 67 p->reload_ctl = false;
68 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
69 GAHBCFG_HBSTLEN_SHIFT;
ca8b0332 70 p->change_speed_quirk = true;
d98c624a 71 p->power_down = false;
7de1debc 72}
323230ef 73
35a60541
MS		 74static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
75{
76 struct dwc2_core_params *p = &hsotg->params;
77
78 p->power_down = 0;
1112cf4c 79 p->phy_utmi_width = 8;
35a60541
MS		 80}
81
7de1debc
JY		 82static 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;
c216765d 92 p->power_down = 0;
7de1debc
JY		 93}
94
95static 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
109static 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;
cc10ce0c 122 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
7de1debc
JY		 123}
124
fc4e326e
NA		 125static 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
7de1debc
JY		 135static 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}
323230ef 141
e35b1350
BH		 142static 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;
e35b1350
BH		 154 p->activate_stm_fs_transceiver = true;
155}
156
1a149e35 157static void dwc2_set_stm32f7_hsotg_params(struct dwc2_hsotg *hsotg)
d8fae8b9
AD		 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
a415083a
AD		 166static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg)
167{
168 struct dwc2_core_params *p = &hsotg->params;
169
170 p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
171 p->speed = DWC2_SPEED_PARAM_FULL;
172 p->host_rx_fifo_size = 128;
173 p->host_nperio_tx_fifo_size = 96;
174 p->host_perio_tx_fifo_size = 96;
175 p->max_packet_count = 256;
176 p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
177 p->i2c_enable = false;
178 p->activate_stm_fs_transceiver = true;
179 p->activate_stm_id_vb_detection = true;
180 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
181}
182
183static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg)
184{
185 struct dwc2_core_params *p = &hsotg->params;
186
187 p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
188 p->activate_stm_id_vb_detection = true;
189 p->host_rx_fifo_size = 440;
190 p->host_nperio_tx_fifo_size = 256;
191 p->host_perio_tx_fifo_size = 256;
192 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
193}
194
323230ef 195const struct of_device_id dwc2_of_match_table[] = {
7de1debc
JY		 196 { .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
197 { .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
198 { .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
199 { .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
200 { .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
201 { .compatible = "snps,dwc2" },
35a60541
MS		 202 { .compatible = "samsung,s3c6400-hsotg",
203 .data = dwc2_set_s3c6400_params },
55b644fd
MB		 204 { .compatible = "amlogic,meson8-usb",
205 .data = dwc2_set_amlogic_params },
7de1debc
JY		 206 { .compatible = "amlogic,meson8b-usb",
207 .data = dwc2_set_amlogic_params },
208 { .compatible = "amlogic,meson-gxbb-usb",
209 .data = dwc2_set_amlogic_params },
fc4e326e
NA		 210 { .compatible = "amlogic,meson-g12a-usb",
211 .data = dwc2_set_amlogic_g12a_params },
7de1debc 212 { .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
e35b1350
BH		 213 { .compatible = "st,stm32f4x9-fsotg",
214 .data = dwc2_set_stm32f4x9_fsotg_params },
215 { .compatible = "st,stm32f4x9-hsotg" },
1a149e35
AD		 216 { .compatible = "st,stm32f7-hsotg",
217 .data = dwc2_set_stm32f7_hsotg_params },
a415083a
AD		 218 { .compatible = "st,stm32mp15-fsotg",
219 .data = dwc2_set_stm32mp15_fsotg_params },
220 { .compatible = "st,stm32mp15-hsotg",
221 .data = dwc2_set_stm32mp15_hsotg_params },
323230ef
JY		 222 {},
223};
224MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
225
245977c9 226static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
05ee799f 227{
245977c9 228 u8 val;
05ee799f 229
245977c9
JY		 230 switch (hsotg->hw_params.op_mode) {
231 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
232 val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
05ee799f 233 break;
245977c9
JY		 234 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
235 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
236 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
237 val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
05ee799f
JY		 238 break;
239 default:
245977c9 240 val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
05ee799f 241 break;
323230ef
JY		 242 }
243
bea8e86c 244 hsotg->params.otg_cap = val;
323230ef
JY		 245}
246
245977c9 247static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
323230ef 248{
245977c9
JY		 249 int val;
250 u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
323230ef 251
245977c9
JY		 252 val = DWC2_PHY_TYPE_PARAM_FS;
253 if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
254 if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
255 hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
256 val = DWC2_PHY_TYPE_PARAM_UTMI;
257 else
258 val = DWC2_PHY_TYPE_PARAM_ULPI;
323230ef
JY		 259 }
260
245977c9
JY		 261 if (dwc2_is_fs_iot(hsotg))
262 hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
323230ef 263
bea8e86c 264 hsotg->params.phy_type = val;
323230ef
JY		 265}
266
245977c9 267static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
323230ef 268{
245977c9 269 int val;
323230ef 270
245977c9
JY		 271 val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
272 DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
323230ef 273
245977c9
JY		 274 if (dwc2_is_fs_iot(hsotg))
275 val = DWC2_SPEED_PARAM_FULL;
38e9002b 276
245977c9
JY		 277 if (dwc2_is_hs_iot(hsotg))
278 val = DWC2_SPEED_PARAM_HIGH;
323230ef 279
bea8e86c 280 hsotg->params.speed = val;
323230ef
JY		 281}
282
245977c9 283static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
323230ef 284{
245977c9 285 int val;
323230ef 286
245977c9
JY		 287 val = (hsotg->hw_params.utmi_phy_data_width ==
288 GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
323230ef 289
42de8afc
JM		 290 if (hsotg->phy) {
291 /*
292 * If using the generic PHY framework, check if the PHY bus
293 * width is 8-bit and set the phyif appropriately.
294 */
295 if (phy_get_bus_width(hsotg->phy) == 8)
296 val = 8;
297 }
298
bea8e86c 299 hsotg->params.phy_utmi_width = val;
323230ef
JY		 300}
301
05ee799f
JY		 302static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
303{
05ee799f 304 struct dwc2_core_params *p = &hsotg->params;
c138ecfa
SA		 305 int depth_average;
306 int fifo_count;
307 int i;
308
309 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
05ee799f
JY		 310
311 memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
c138ecfa
SA		 312 depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
313 for (i = 1; i <= fifo_count; i++)
314 p->g_tx_fifo_size[i] = depth_average;
9962b62f
JY		 315}
316
03ea6d6e
JY		 317static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
318{
319 int val;
320
321 if (hsotg->hw_params.hibernation)
322 val = 2;
323 else if (hsotg->hw_params.power_optimized)
324 val = 1;
325 else
326 val = 0;
327
328 hsotg->params.power_down = val;
329}
330
28b5c129
MH		 331static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
332{
333 struct dwc2_core_params *p = &hsotg->params;
334
335 p->lpm = hsotg->hw_params.lpm_mode;
336 if (p->lpm) {
337 p->lpm_clock_gating = true;
338 p->besl = true;
339 p->hird_threshold_en = true;
340 p->hird_threshold = 4;
341 } else {
342 p->lpm_clock_gating = false;
343 p->besl = false;
344 p->hird_threshold_en = false;
345 }
346}
347
05ee799f 348/**
245977c9
JY		 349 * dwc2_set_default_params() - Set all core parameters to their
350 * auto-detected default values.
6fb914d7
GT		 351 *
352 * @hsotg: Programming view of the DWC_otg controller
353 *
323230ef 354 */
245977c9 355static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
323230ef 356{
05ee799f
JY		 357 struct dwc2_hw_params *hw = &hsotg->hw_params;
358 struct dwc2_core_params *p = &hsotg->params;
6b66ce51 359 bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
323230ef 360
245977c9
JY		 361 dwc2_set_param_otg_cap(hsotg);
362 dwc2_set_param_phy_type(hsotg);
363 dwc2_set_param_speed(hsotg);
364 dwc2_set_param_phy_utmi_width(hsotg);
03ea6d6e 365 dwc2_set_param_power_down(hsotg);
28b5c129 366 dwc2_set_param_lpm(hsotg);
245977c9
JY		 367 p->phy_ulpi_ddr = false;
368 p->phy_ulpi_ext_vbus = false;
369
370 p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
371 p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
372 p->i2c_enable = hw->i2c_enable;
66e77a24 373 p->acg_enable = hw->acg_enable;
245977c9
JY		 374 p->ulpi_fs_ls = false;
375 p->ts_dline = false;
376 p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
377 p->uframe_sched = true;
378 p->external_id_pin_ctl = false;
b43ebc96 379 p->ipg_isoc_en = false;
ca531bc2 380 p->service_interval = false;
245977c9
JY		 381 p->max_packet_count = hw->max_packet_count;
382 p->max_transfer_size = hw->max_transfer_size;
1b52d2fa 383 p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
f3a61e4e
GT		 384 p->ref_clk_per = 33333;
385 p->sof_cnt_wkup_alert = 100;
245977c9 386
6b66ce51
JY		 387 if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
388 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
245977c9
JY		 389 p->host_dma = dma_capable;
390 p->dma_desc_enable = false;
391 p->dma_desc_fs_enable = false;
392 p->host_support_fs_ls_low_power = false;
393 p->host_ls_low_power_phy_clk = false;
394 p->host_channels = hw->host_channels;
395 p->host_rx_fifo_size = hw->rx_fifo_size;
396 p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
397 p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
6b66ce51
JY		 398 }
399
05ee799f
JY		 400 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
401 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
245977c9
JY		 402 p->g_dma = dma_capable;
403 p->g_dma_desc = hw->dma_desc_enable;
05ee799f
JY		 404
405 /*
406 * The values for g_rx_fifo_size (2048) and
407 * g_np_tx_fifo_size (1024) come from the legacy s3c
408 * gadget driver. These defaults have been hard-coded
409 * for some time so many platforms depend on these
410 * values. Leave them as defaults for now and only
411 * auto-detect if the hardware does not support the
412 * default.
413 */
245977c9
JY		 414 p->g_rx_fifo_size = 2048;
415 p->g_np_tx_fifo_size = 1024;
05ee799f
JY		 416 dwc2_set_param_tx_fifo_sizes(hsotg);
417 }
323230ef
JY		 418}
419
f9f93cbb
JY		 420/**
421 * dwc2_get_device_properties() - Read in device properties.
422 *
6fb914d7
GT		 423 * @hsotg: Programming view of the DWC_otg controller
424 *
f9f93cbb
JY		 425 * Read in the device properties and adjust core parameters if needed.
426 */
427static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
428{
429 struct dwc2_core_params *p = &hsotg->params;
430 int num;
431
432 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
433 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
434 device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
435 &p->g_rx_fifo_size);
436
437 device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
438 &p->g_np_tx_fifo_size);
439
07e803ec 440 num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
f9f93cbb
JY		 441 if (num > 0) {
442 num = min(num, 15);
443 memset(p->g_tx_fifo_size, 0,
444 sizeof(p->g_tx_fifo_size));
445 device_property_read_u32_array(hsotg->dev,
446 "g-tx-fifo-size",
447 &p->g_tx_fifo_size[1],
448 num);
449 }
450 }
b11633c4
DN		 451
452 if (of_find_property(hsotg->dev->of_node, "disable-over-current", NULL))
453 p->oc_disable = true;
f9f93cbb
JY		 454}
455
d936e666
JY		 456static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
457{
458 int valid = 1;
459
460 switch (hsotg->params.otg_cap) {
461 case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
462 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
463 valid = 0;
464 break;
465 case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
466 switch (hsotg->hw_params.op_mode) {
467 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
468 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
469 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
470 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
471 break;
472 default:
473 valid = 0;
474 break;
475 }
476 break;
477 case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
478 /* always valid */
479 break;
480 default:
481 valid = 0;
482 break;
483 }
484
485 if (!valid)
486 dwc2_set_param_otg_cap(hsotg);
487}
488
489static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
490{
491 int valid = 0;
492 u32 hs_phy_type;
493 u32 fs_phy_type;
494
495 hs_phy_type = hsotg->hw_params.hs_phy_type;
496 fs_phy_type = hsotg->hw_params.fs_phy_type;
497
498 switch (hsotg->params.phy_type) {
499 case DWC2_PHY_TYPE_PARAM_FS:
500 if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
501 valid = 1;
502 break;
503 case DWC2_PHY_TYPE_PARAM_UTMI:
504 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
505 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
506 valid = 1;
507 break;
508 case DWC2_PHY_TYPE_PARAM_ULPI:
509 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
510 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
511 valid = 1;
512 break;
513 default:
514 break;
515 }
516
517 if (!valid)
518 dwc2_set_param_phy_type(hsotg);
519}
520
521static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
522{
523 int valid = 1;
524 int phy_type = hsotg->params.phy_type;
525 int speed = hsotg->params.speed;
526
527 switch (speed) {
528 case DWC2_SPEED_PARAM_HIGH:
529 if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
530 (phy_type == DWC2_PHY_TYPE_PARAM_FS))
531 valid = 0;
532 break;
533 case DWC2_SPEED_PARAM_FULL:
534 case DWC2_SPEED_PARAM_LOW:
535 break;
536 default:
537 valid = 0;
538 break;
539 }
540
541 if (!valid)
542 dwc2_set_param_speed(hsotg);
543}
544
545static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
546{
547 int valid = 0;
548 int param = hsotg->params.phy_utmi_width;
549 int width = hsotg->hw_params.utmi_phy_data_width;
550
551 switch (width) {
552 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
553 valid = (param == 8);
554 break;
555 case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
556 valid = (param == 16);
557 break;
558 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
559 valid = (param == 8 || param == 16);
560 break;
561 }
562
563 if (!valid)
564 dwc2_set_param_phy_utmi_width(hsotg);
565}
566
631a2310
VM		 567static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
568{
569 int param = hsotg->params.power_down;
570
571 switch (param) {
572 case DWC2_POWER_DOWN_PARAM_NONE:
573 break;
574 case DWC2_POWER_DOWN_PARAM_PARTIAL:
575 if (hsotg->hw_params.power_optimized)
576 break;
577 dev_dbg(hsotg->dev,
578 "Partial power down isn't supported by HW\n");
579 param = DWC2_POWER_DOWN_PARAM_NONE;
580 break;
581 case DWC2_POWER_DOWN_PARAM_HIBERNATION:
582 if (hsotg->hw_params.hibernation)
583 break;
584 dev_dbg(hsotg->dev,
585 "Hibernation isn't supported by HW\n");
586 param = DWC2_POWER_DOWN_PARAM_NONE;
587 break;
588 default:
589 dev_err(hsotg->dev,
590 "%s: Invalid parameter power_down=%d\n",
591 __func__, param);
592 param = DWC2_POWER_DOWN_PARAM_NONE;
593 break;
594 }
595
596 hsotg->params.power_down = param;
597}
598
3c6aea73
SA		 599static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
600{
601 int fifo_count;
602 int fifo;
603 int min;
604 u32 total = 0;
605 u32 dptxfszn;
606
607 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
608 min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
609
610 for (fifo = 1; fifo <= fifo_count; fifo++)
611 total += hsotg->params.g_tx_fifo_size[fifo];
612
613 if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
614 dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
615 __func__);
616 dwc2_set_param_tx_fifo_sizes(hsotg);
617 }
618
619 for (fifo = 1; fifo <= fifo_count; fifo++) {
9273083a 620 dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
3c6aea73
SA		 621
622 if (hsotg->params.g_tx_fifo_size[fifo] < min ||
623 hsotg->params.g_tx_fifo_size[fifo] > dptxfszn) {
624 dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
625 __func__, fifo,
626 hsotg->params.g_tx_fifo_size[fifo]);
627 hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
628 }
629 }
630}
631
d936e666 632#define CHECK_RANGE(_param, _min, _max, _def) do { \
47265c06 633 if ((int)(hsotg->params._param) < (_min) || \
d936e666
JY		 634 (hsotg->params._param) > (_max)) { \
635 dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
636 __func__, #_param, hsotg->params._param); \
637 hsotg->params._param = (_def); \
638 } \
639 } while (0)
640
641#define CHECK_BOOL(_param, _check) do { \
642 if (hsotg->params._param && !(_check)) { \
643 dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
644 __func__, #_param, hsotg->params._param); \
645 hsotg->params._param = false; \
646 } \
647 } while (0)
648
649static void dwc2_check_params(struct dwc2_hsotg *hsotg)
650{
651 struct dwc2_hw_params *hw = &hsotg->hw_params;
652 struct dwc2_core_params *p = &hsotg->params;
653 bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
654
655 dwc2_check_param_otg_cap(hsotg);
656 dwc2_check_param_phy_type(hsotg);
657 dwc2_check_param_speed(hsotg);
658 dwc2_check_param_phy_utmi_width(hsotg);
631a2310 659 dwc2_check_param_power_down(hsotg);
d936e666
JY		 660 CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
661 CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
662 CHECK_BOOL(i2c_enable, hw->i2c_enable);
b43ebc96 663 CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
66e77a24 664 CHECK_BOOL(acg_enable, hw->acg_enable);
d936e666 665 CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
6f80b6de
SA		 666 CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
667 CHECK_BOOL(lpm, hw->lpm_mode);
668 CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
669 CHECK_BOOL(besl, hsotg->params.lpm);
670 CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
671 CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
672 CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
ca531bc2 673 CHECK_BOOL(service_interval, hw->service_interval_mode);
d936e666
JY		 674 CHECK_RANGE(max_packet_count,
675 15, hw->max_packet_count,
676 hw->max_packet_count);
677 CHECK_RANGE(max_transfer_size,
678 2047, hw->max_transfer_size,
679 hw->max_transfer_size);
680
681 if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
682 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
683 CHECK_BOOL(host_dma, dma_capable);
684 CHECK_BOOL(dma_desc_enable, p->host_dma);
685 CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
686 CHECK_BOOL(host_ls_low_power_phy_clk,
687 p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
688 CHECK_RANGE(host_channels,
689 1, hw->host_channels,
690 hw->host_channels);
691 CHECK_RANGE(host_rx_fifo_size,
692 16, hw->rx_fifo_size,
693 hw->rx_fifo_size);
694 CHECK_RANGE(host_nperio_tx_fifo_size,
695 16, hw->host_nperio_tx_fifo_size,
696 hw->host_nperio_tx_fifo_size);
697 CHECK_RANGE(host_perio_tx_fifo_size,
698 16, hw->host_perio_tx_fifo_size,
699 hw->host_perio_tx_fifo_size);
700 }
701
702 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
703 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
704 CHECK_BOOL(g_dma, dma_capable);
705 CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
706 CHECK_RANGE(g_rx_fifo_size,
707 16, hw->rx_fifo_size,
708 hw->rx_fifo_size);
709 CHECK_RANGE(g_np_tx_fifo_size,
710 16, hw->dev_nperio_tx_fifo_size,
711 hw->dev_nperio_tx_fifo_size);
3c6aea73 712 dwc2_check_param_tx_fifo_sizes(hsotg);
d936e666
JY		 713 }
714}
715
323230ef
JY		 716/*
717 * Gets host hardware parameters. Forces host mode if not currently in
718 * host mode. Should be called immediately after a core soft reset in
719 * order to get the reset values.
720 */
721static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
722{
723 struct dwc2_hw_params *hw = &hsotg->hw_params;
724 u32 gnptxfsiz;
725 u32 hptxfsiz;
323230ef
JY		 726
727 if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
728 return;
729
13b1f8e2 730 dwc2_force_mode(hsotg, true);
323230ef 731
f25c42b8
GS		 732 gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
733 hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
323230ef 734
323230ef
JY		 735 hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
736 FIFOSIZE_DEPTH_SHIFT;
737 hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
738 FIFOSIZE_DEPTH_SHIFT;
739}
740
741/*
742 * Gets device hardware parameters. Forces device mode if not
743 * currently in device mode. Should be called immediately after a core
744 * soft reset in order to get the reset values.
745 */
746static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
747{
748 struct dwc2_hw_params *hw = &hsotg->hw_params;
323230ef 749 u32 gnptxfsiz;
9273083a 750 int fifo, fifo_count;
323230ef
JY		 751
752 if (hsotg->dr_mode == USB_DR_MODE_HOST)
753 return;
754
13b1f8e2 755 dwc2_force_mode(hsotg, false);
323230ef 756
f25c42b8 757 gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
323230ef 758
9273083a
MH		 759 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
760
761 for (fifo = 1; fifo <= fifo_count; fifo++) {
762 hw->g_tx_fifo_size[fifo] =
f25c42b8 763 (dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
9273083a
MH		 764 FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
765 }
766
323230ef
JY		 767 hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
768 FIFOSIZE_DEPTH_SHIFT;
769}
770
771/**
772 * During device initialization, read various hardware configuration
773 * registers and interpret the contents.
6fb914d7
GT		 774 *
775 * @hsotg: Programming view of the DWC_otg controller
776 *
323230ef
JY		 777 */
778int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
779{
780 struct dwc2_hw_params *hw = &hsotg->hw_params;
781 unsigned int width;
782 u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
783 u32 grxfsiz;
784
785 /*
786 * Attempt to ensure this device is really a DWC_otg Controller.
787 * Read and verify the GSNPSID register contents. The value should be
d14ccaba 788 * 0x45f4xxxx, 0x5531xxxx or 0x5532xxxx
323230ef 789 */
d14ccaba 790
f25c42b8 791 hw->snpsid = dwc2_readl(hsotg, GSNPSID);
d14ccaba
GS		 792 if ((hw->snpsid & GSNPSID_ID_MASK) != DWC2_OTG_ID &&
793 (hw->snpsid & GSNPSID_ID_MASK) != DWC2_FS_IOT_ID &&
794 (hw->snpsid & GSNPSID_ID_MASK) != DWC2_HS_IOT_ID) {
323230ef
JY		 795 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
796 hw->snpsid);
797 return -ENODEV;
798 }
799
800 dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
801 hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
802 hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
803
f25c42b8
GS		 804 hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
805 hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
806 hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
807 hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
808 grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
323230ef 809
323230ef
JY		 810 /* hwcfg1 */
811 hw->dev_ep_dirs = hwcfg1;
812
813 /* hwcfg2 */
814 hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
815 GHWCFG2_OP_MODE_SHIFT;
816 hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
817 GHWCFG2_ARCHITECTURE_SHIFT;
818 hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
819 hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
820 GHWCFG2_NUM_HOST_CHAN_SHIFT);
821 hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
822 GHWCFG2_HS_PHY_TYPE_SHIFT;
823 hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
824 GHWCFG2_FS_PHY_TYPE_SHIFT;
825 hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
826 GHWCFG2_NUM_DEV_EP_SHIFT;
827 hw->nperio_tx_q_depth =
828 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
829 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
830 hw->host_perio_tx_q_depth =
831 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
832 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
833 hw->dev_token_q_depth =
834 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
835 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
836
837 /* hwcfg3 */
838 width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
839 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
840 hw->max_transfer_size = (1 << (width + 11)) - 1;
841 width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
842 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
843 hw->max_packet_count = (1 << (width + 4)) - 1;
844 hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
845 hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
846 GHWCFG3_DFIFO_DEPTH_SHIFT;
6f80b6de 847 hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
323230ef
JY		 848
849 /* hwcfg4 */
850 hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
851 hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
852 GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
9273083a
MH		 853 hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
854 GHWCFG4_NUM_IN_EPS_SHIFT;
323230ef
JY		 855 hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
856 hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
631a2310 857 hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
323230ef
JY		 858 hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
859 GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
66e77a24 860 hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
b43ebc96 861 hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
ca531bc2
GT		 862 hw->service_interval_mode = !!(hwcfg4 &
863 GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
323230ef
JY		 864
865 /* fifo sizes */
d1531319 866 hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
323230ef 867 GRXFSIZ_DEPTH_SHIFT;
9273083a
MH		 868 /*
869 * Host specific hardware parameters. Reading these parameters
870 * requires the controller to be in host mode. The mode will
871 * be forced, if necessary, to read these values.
872 */
873 dwc2_get_host_hwparams(hsotg);
874 dwc2_get_dev_hwparams(hsotg);
323230ef 875
323230ef
JY		 876 return 0;
877}
878
334bbd4e
JY		 879int dwc2_init_params(struct dwc2_hsotg *hsotg)
880{
7de1debc
JY		 881 const struct of_device_id *match;
882 void (*set_params)(void *data);
883
245977c9 884 dwc2_set_default_params(hsotg);
f9f93cbb 885 dwc2_get_device_properties(hsotg);
334bbd4e 886
7de1debc
JY		 887 match = of_match_device(dwc2_of_match_table, hsotg->dev);
888 if (match && match->data) {
889 set_params = match->data;
890 set_params(hsotg);
891 }
892
d936e666
JY		 893 dwc2_check_params(hsotg);
894
334bbd4e
JY		 895 return 0;
896}
Linux 6.x block layer and io_uring tree(s)