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1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2/*
3 * Copyright (C) 2004-2016 Synopsys, Inc.
4 */
5
6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/of_device.h>
9#include <linux/usb/of.h>
10
11#include "core.h"
12
13static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
14{
15 struct dwc2_core_params *p = &hsotg->params;
16
17 p->host_rx_fifo_size = 774;
18 p->max_transfer_size = 65535;
19 p->max_packet_count = 511;
20 p->ahbcfg = 0x10;
21}
22
23static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
24{
25 struct dwc2_core_params *p = &hsotg->params;
26
27 p->otg_caps.hnp_support = false;
28 p->otg_caps.srp_support = false;
29 p->speed = DWC2_SPEED_PARAM_HIGH;
30 p->host_rx_fifo_size = 512;
31 p->host_nperio_tx_fifo_size = 512;
32 p->host_perio_tx_fifo_size = 512;
33 p->max_transfer_size = 65535;
34 p->max_packet_count = 511;
35 p->host_channels = 16;
36 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
37 p->phy_utmi_width = 8;
38 p->i2c_enable = false;
39 p->reload_ctl = false;
40 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
41 GAHBCFG_HBSTLEN_SHIFT;
42 p->change_speed_quirk = true;
43 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
44}
45
46static void dwc2_set_jz4775_params(struct dwc2_hsotg *hsotg)
47{
48 struct dwc2_core_params *p = &hsotg->params;
49
50 p->otg_caps.hnp_support = false;
51 p->speed = DWC2_SPEED_PARAM_HIGH;
52 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
53 p->phy_utmi_width = 16;
54 p->activate_ingenic_overcurrent_detection =
55 !device_property_read_bool(hsotg->dev, "disable-over-current");
56}
57
58static void dwc2_set_x1600_params(struct dwc2_hsotg *hsotg)
59{
60 struct dwc2_core_params *p = &hsotg->params;
61
62 p->otg_caps.hnp_support = false;
63 p->speed = DWC2_SPEED_PARAM_HIGH;
64 p->host_channels = 16;
65 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
66 p->phy_utmi_width = 16;
67 p->activate_ingenic_overcurrent_detection =
68 !device_property_read_bool(hsotg->dev, "disable-over-current");
69}
70
71static void dwc2_set_x2000_params(struct dwc2_hsotg *hsotg)
72{
73 struct dwc2_core_params *p = &hsotg->params;
74
75 p->otg_caps.hnp_support = false;
76 p->speed = DWC2_SPEED_PARAM_HIGH;
77 p->host_rx_fifo_size = 1024;
78 p->host_nperio_tx_fifo_size = 1024;
79 p->host_perio_tx_fifo_size = 1024;
80 p->host_channels = 16;
81 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
82 p->phy_utmi_width = 16;
83 p->activate_ingenic_overcurrent_detection =
84 !device_property_read_bool(hsotg->dev, "disable-over-current");
85}
86
87static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
88{
89 struct dwc2_core_params *p = &hsotg->params;
90
91 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
92 p->no_clock_gating = true;
93 p->phy_utmi_width = 8;
94}
95
96static void dwc2_set_socfpga_agilex_params(struct dwc2_hsotg *hsotg)
97{
98 struct dwc2_core_params *p = &hsotg->params;
99
100 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
101 p->no_clock_gating = true;
102}
103
104static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
105{
106 struct dwc2_core_params *p = &hsotg->params;
107
108 p->otg_caps.hnp_support = false;
109 p->otg_caps.srp_support = false;
110 p->host_rx_fifo_size = 525;
111 p->host_nperio_tx_fifo_size = 128;
112 p->host_perio_tx_fifo_size = 256;
113 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
114 GAHBCFG_HBSTLEN_SHIFT;
115 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
116 p->lpm = false;
117 p->lpm_clock_gating = false;
118 p->besl = false;
119 p->hird_threshold_en = false;
120}
121
122static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)
123{
124 struct dwc2_core_params *p = &hsotg->params;
125
126 p->otg_caps.hnp_support = false;
127 p->otg_caps.srp_support = false;
128 p->host_rx_fifo_size = 288;
129 p->host_nperio_tx_fifo_size = 128;
130 p->host_perio_tx_fifo_size = 96;
131 p->max_transfer_size = 65535;
132 p->max_packet_count = 511;
133 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
134 GAHBCFG_HBSTLEN_SHIFT;
135}
136
137static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
138{
139 struct dwc2_core_params *p = &hsotg->params;
140
141 p->otg_caps.hnp_support = false;
142 p->otg_caps.srp_support = false;
143 p->speed = DWC2_SPEED_PARAM_HIGH;
144 p->host_rx_fifo_size = 512;
145 p->host_nperio_tx_fifo_size = 500;
146 p->host_perio_tx_fifo_size = 500;
147 p->host_channels = 16;
148 p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
149 p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 <<
150 GAHBCFG_HBSTLEN_SHIFT;
151 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
152}
153
154static void dwc2_set_amlogic_g12a_params(struct dwc2_hsotg *hsotg)
155{
156 struct dwc2_core_params *p = &hsotg->params;
157
158 p->lpm = false;
159 p->lpm_clock_gating = false;
160 p->besl = false;
161 p->hird_threshold_en = false;
162}
163
164static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
165{
166 struct dwc2_core_params *p = &hsotg->params;
167
168 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
169}
170
171static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
172{
173 struct dwc2_core_params *p = &hsotg->params;
174
175 p->otg_caps.hnp_support = false;
176 p->otg_caps.srp_support = false;
177 p->speed = DWC2_SPEED_PARAM_FULL;
178 p->host_rx_fifo_size = 128;
179 p->host_nperio_tx_fifo_size = 96;
180 p->host_perio_tx_fifo_size = 96;
181 p->max_packet_count = 256;
182 p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
183 p->i2c_enable = false;
184 p->activate_stm_fs_transceiver = true;
185}
186
187static void dwc2_set_stm32f7_hsotg_params(struct dwc2_hsotg *hsotg)
188{
189 struct dwc2_core_params *p = &hsotg->params;
190
191 p->host_rx_fifo_size = 622;
192 p->host_nperio_tx_fifo_size = 128;
193 p->host_perio_tx_fifo_size = 256;
194}
195
196static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg)
197{
198 struct dwc2_core_params *p = &hsotg->params;
199
200 p->otg_caps.hnp_support = false;
201 p->otg_caps.srp_support = false;
202 p->otg_caps.otg_rev = 0x200;
203 p->speed = DWC2_SPEED_PARAM_FULL;
204 p->host_rx_fifo_size = 128;
205 p->host_nperio_tx_fifo_size = 96;
206 p->host_perio_tx_fifo_size = 96;
207 p->max_packet_count = 256;
208 p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
209 p->i2c_enable = false;
210 p->activate_stm_fs_transceiver = true;
211 p->activate_stm_id_vb_detection = true;
212 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
213 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
214 p->host_support_fs_ls_low_power = true;
215 p->host_ls_low_power_phy_clk = true;
216}
217
218static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg)
219{
220 struct dwc2_core_params *p = &hsotg->params;
221
222 p->otg_caps.hnp_support = false;
223 p->otg_caps.srp_support = false;
224 p->otg_caps.otg_rev = 0x200;
225 p->activate_stm_id_vb_detection = !device_property_read_bool(hsotg->dev, "usb-role-switch");
226 p->host_rx_fifo_size = 440;
227 p->host_nperio_tx_fifo_size = 256;
228 p->host_perio_tx_fifo_size = 256;
229 p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
230 p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
231 p->lpm = false;
232 p->lpm_clock_gating = false;
233 p->besl = false;
234 p->hird_threshold_en = false;
235}
236
237const struct of_device_id dwc2_of_match_table[] = {
238 { .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
239 { .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
240 { .compatible = "ingenic,jz4775-otg", .data = dwc2_set_jz4775_params },
241 { .compatible = "ingenic,jz4780-otg", .data = dwc2_set_jz4775_params },
242 { .compatible = "ingenic,x1000-otg", .data = dwc2_set_jz4775_params },
243 { .compatible = "ingenic,x1600-otg", .data = dwc2_set_x1600_params },
244 { .compatible = "ingenic,x1700-otg", .data = dwc2_set_x1600_params },
245 { .compatible = "ingenic,x1830-otg", .data = dwc2_set_x1600_params },
246 { .compatible = "ingenic,x2000-otg", .data = dwc2_set_x2000_params },
247 { .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
248 { .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
249 { .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
250 { .compatible = "snps,dwc2" },
251 { .compatible = "samsung,s3c6400-hsotg",
252 .data = dwc2_set_s3c6400_params },
253 { .compatible = "amlogic,meson8-usb",
254 .data = dwc2_set_amlogic_params },
255 { .compatible = "amlogic,meson8b-usb",
256 .data = dwc2_set_amlogic_params },
257 { .compatible = "amlogic,meson-gxbb-usb",
258 .data = dwc2_set_amlogic_params },
259 { .compatible = "amlogic,meson-g12a-usb",
260 .data = dwc2_set_amlogic_g12a_params },
261 { .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
262 { .compatible = "apm,apm82181-dwc-otg", .data = dwc2_set_amcc_params },
263 { .compatible = "st,stm32f4x9-fsotg",
264 .data = dwc2_set_stm32f4x9_fsotg_params },
265 { .compatible = "st,stm32f4x9-hsotg" },
266 { .compatible = "st,stm32f7-hsotg",
267 .data = dwc2_set_stm32f7_hsotg_params },
268 { .compatible = "st,stm32mp15-fsotg",
269 .data = dwc2_set_stm32mp15_fsotg_params },
270 { .compatible = "st,stm32mp15-hsotg",
271 .data = dwc2_set_stm32mp15_hsotg_params },
272 { .compatible = "intel,socfpga-agilex-hsotg",
273 .data = dwc2_set_socfpga_agilex_params },
274 {},
275};
276MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
277
278const struct acpi_device_id dwc2_acpi_match[] = {
279 { "BCM2848", (kernel_ulong_t)dwc2_set_bcm_params },
280 { },
281};
282MODULE_DEVICE_TABLE(acpi, dwc2_acpi_match);
283
284static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
285{
286 switch (hsotg->hw_params.op_mode) {
287 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
288 hsotg->params.otg_caps.hnp_support = true;
289 hsotg->params.otg_caps.srp_support = true;
290 break;
291 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
292 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
293 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
294 hsotg->params.otg_caps.hnp_support = false;
295 hsotg->params.otg_caps.srp_support = true;
296 break;
297 default:
298 hsotg->params.otg_caps.hnp_support = false;
299 hsotg->params.otg_caps.srp_support = false;
300 break;
301 }
302}
303
304static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
305{
306 int val;
307 u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
308
309 val = DWC2_PHY_TYPE_PARAM_FS;
310 if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
311 if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
312 hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
313 val = DWC2_PHY_TYPE_PARAM_UTMI;
314 else
315 val = DWC2_PHY_TYPE_PARAM_ULPI;
316 }
317
318 if (dwc2_is_fs_iot(hsotg))
319 hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
320
321 hsotg->params.phy_type = val;
322}
323
324static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
325{
326 int val;
327
328 val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
329 DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
330
331 if (dwc2_is_fs_iot(hsotg))
332 val = DWC2_SPEED_PARAM_FULL;
333
334 if (dwc2_is_hs_iot(hsotg))
335 val = DWC2_SPEED_PARAM_HIGH;
336
337 hsotg->params.speed = val;
338}
339
340static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
341{
342 int val;
343
344 val = (hsotg->hw_params.utmi_phy_data_width ==
345 GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
346
347 if (hsotg->phy) {
348 /*
349 * If using the generic PHY framework, check if the PHY bus
350 * width is 8-bit and set the phyif appropriately.
351 */
352 if (phy_get_bus_width(hsotg->phy) == 8)
353 val = 8;
354 }
355
356 hsotg->params.phy_utmi_width = val;
357}
358
359static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
360{
361 struct dwc2_core_params *p = &hsotg->params;
362 int depth_average;
363 int fifo_count;
364 int i;
365
366 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
367
368 memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
369 depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
370 for (i = 1; i <= fifo_count; i++)
371 p->g_tx_fifo_size[i] = depth_average;
372}
373
374static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
375{
376 int val;
377
378 if (hsotg->hw_params.hibernation)
379 val = DWC2_POWER_DOWN_PARAM_HIBERNATION;
380 else if (hsotg->hw_params.power_optimized)
381 val = DWC2_POWER_DOWN_PARAM_PARTIAL;
382 else
383 val = DWC2_POWER_DOWN_PARAM_NONE;
384
385 hsotg->params.power_down = val;
386}
387
388static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
389{
390 struct dwc2_core_params *p = &hsotg->params;
391
392 p->lpm = hsotg->hw_params.lpm_mode;
393 if (p->lpm) {
394 p->lpm_clock_gating = true;
395 p->besl = true;
396 p->hird_threshold_en = true;
397 p->hird_threshold = 4;
398 } else {
399 p->lpm_clock_gating = false;
400 p->besl = false;
401 p->hird_threshold_en = false;
402 }
403}
404
405/**
406 * dwc2_set_default_params() - Set all core parameters to their
407 * auto-detected default values.
408 *
409 * @hsotg: Programming view of the DWC_otg controller
410 *
411 */
412static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
413{
414 struct dwc2_hw_params *hw = &hsotg->hw_params;
415 struct dwc2_core_params *p = &hsotg->params;
416 bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
417
418 dwc2_set_param_otg_cap(hsotg);
419 dwc2_set_param_phy_type(hsotg);
420 dwc2_set_param_speed(hsotg);
421 dwc2_set_param_phy_utmi_width(hsotg);
422 dwc2_set_param_power_down(hsotg);
423 dwc2_set_param_lpm(hsotg);
424 p->phy_ulpi_ddr = false;
425 p->phy_ulpi_ext_vbus = false;
426
427 p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
428 p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
429 p->i2c_enable = hw->i2c_enable;
430 p->acg_enable = hw->acg_enable;
431 p->ulpi_fs_ls = false;
432 p->ts_dline = false;
433 p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
434 p->uframe_sched = true;
435 p->external_id_pin_ctl = false;
436 p->ipg_isoc_en = false;
437 p->service_interval = false;
438 p->max_packet_count = hw->max_packet_count;
439 p->max_transfer_size = hw->max_transfer_size;
440 p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
441 p->ref_clk_per = 33333;
442 p->sof_cnt_wkup_alert = 100;
443
444 if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
445 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
446 p->host_dma = dma_capable;
447 p->dma_desc_enable = false;
448 p->dma_desc_fs_enable = false;
449 p->host_support_fs_ls_low_power = false;
450 p->host_ls_low_power_phy_clk = false;
451 p->host_channels = hw->host_channels;
452 p->host_rx_fifo_size = hw->rx_fifo_size;
453 p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
454 p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
455 }
456
457 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
458 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
459 p->g_dma = dma_capable;
460 p->g_dma_desc = hw->dma_desc_enable;
461
462 /*
463 * The values for g_rx_fifo_size (2048) and
464 * g_np_tx_fifo_size (1024) come from the legacy s3c
465 * gadget driver. These defaults have been hard-coded
466 * for some time so many platforms depend on these
467 * values. Leave them as defaults for now and only
468 * auto-detect if the hardware does not support the
469 * default.
470 */
471 p->g_rx_fifo_size = 2048;
472 p->g_np_tx_fifo_size = 1024;
473 dwc2_set_param_tx_fifo_sizes(hsotg);
474 }
475}
476
477/**
478 * dwc2_get_device_properties() - Read in device properties.
479 *
480 * @hsotg: Programming view of the DWC_otg controller
481 *
482 * Read in the device properties and adjust core parameters if needed.
483 */
484static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
485{
486 struct dwc2_core_params *p = &hsotg->params;
487 int num;
488
489 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
490 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
491 device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
492 &p->g_rx_fifo_size);
493
494 device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
495 &p->g_np_tx_fifo_size);
496
497 num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
498 if (num > 0) {
499 num = min(num, 15);
500 memset(p->g_tx_fifo_size, 0,
501 sizeof(p->g_tx_fifo_size));
502 device_property_read_u32_array(hsotg->dev,
503 "g-tx-fifo-size",
504 &p->g_tx_fifo_size[1],
505 num);
506 }
507
508 of_usb_update_otg_caps(hsotg->dev->of_node, &p->otg_caps);
509 }
510
511 if (of_find_property(hsotg->dev->of_node, "disable-over-current", NULL))
512 p->oc_disable = true;
513}
514
515static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
516{
517 int valid = 1;
518
519 if (hsotg->params.otg_caps.hnp_support && hsotg->params.otg_caps.srp_support) {
520 /* check HNP && SRP capable */
521 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
522 valid = 0;
523 } else if (!hsotg->params.otg_caps.hnp_support) {
524 /* check SRP only capable */
525 if (hsotg->params.otg_caps.srp_support) {
526 switch (hsotg->hw_params.op_mode) {
527 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
528 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
529 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
530 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
531 break;
532 default:
533 valid = 0;
534 break;
535 }
536 }
537 /* else: NO HNP && NO SRP capable: always valid */
538 } else {
539 valid = 0;
540 }
541
542 if (!valid)
543 dwc2_set_param_otg_cap(hsotg);
544}
545
546static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
547{
548 int valid = 0;
549 u32 hs_phy_type;
550 u32 fs_phy_type;
551
552 hs_phy_type = hsotg->hw_params.hs_phy_type;
553 fs_phy_type = hsotg->hw_params.fs_phy_type;
554
555 switch (hsotg->params.phy_type) {
556 case DWC2_PHY_TYPE_PARAM_FS:
557 if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
558 valid = 1;
559 break;
560 case DWC2_PHY_TYPE_PARAM_UTMI:
561 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
562 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
563 valid = 1;
564 break;
565 case DWC2_PHY_TYPE_PARAM_ULPI:
566 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
567 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
568 valid = 1;
569 break;
570 default:
571 break;
572 }
573
574 if (!valid)
575 dwc2_set_param_phy_type(hsotg);
576}
577
578static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
579{
580 int valid = 1;
581 int phy_type = hsotg->params.phy_type;
582 int speed = hsotg->params.speed;
583
584 switch (speed) {
585 case DWC2_SPEED_PARAM_HIGH:
586 if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
587 (phy_type == DWC2_PHY_TYPE_PARAM_FS))
588 valid = 0;
589 break;
590 case DWC2_SPEED_PARAM_FULL:
591 case DWC2_SPEED_PARAM_LOW:
592 break;
593 default:
594 valid = 0;
595 break;
596 }
597
598 if (!valid)
599 dwc2_set_param_speed(hsotg);
600}
601
602static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
603{
604 int valid = 0;
605 int param = hsotg->params.phy_utmi_width;
606 int width = hsotg->hw_params.utmi_phy_data_width;
607
608 switch (width) {
609 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
610 valid = (param == 8);
611 break;
612 case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
613 valid = (param == 16);
614 break;
615 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
616 valid = (param == 8 || param == 16);
617 break;
618 }
619
620 if (!valid)
621 dwc2_set_param_phy_utmi_width(hsotg);
622}
623
624static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
625{
626 int param = hsotg->params.power_down;
627
628 switch (param) {
629 case DWC2_POWER_DOWN_PARAM_NONE:
630 break;
631 case DWC2_POWER_DOWN_PARAM_PARTIAL:
632 if (hsotg->hw_params.power_optimized)
633 break;
634 dev_dbg(hsotg->dev,
635 "Partial power down isn't supported by HW\n");
636 param = DWC2_POWER_DOWN_PARAM_NONE;
637 break;
638 case DWC2_POWER_DOWN_PARAM_HIBERNATION:
639 if (hsotg->hw_params.hibernation)
640 break;
641 dev_dbg(hsotg->dev,
642 "Hibernation isn't supported by HW\n");
643 param = DWC2_POWER_DOWN_PARAM_NONE;
644 break;
645 default:
646 dev_err(hsotg->dev,
647 "%s: Invalid parameter power_down=%d\n",
648 __func__, param);
649 param = DWC2_POWER_DOWN_PARAM_NONE;
650 break;
651 }
652
653 hsotg->params.power_down = param;
654}
655
656static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
657{
658 int fifo_count;
659 int fifo;
660 int min;
661 u32 total = 0;
662 u32 dptxfszn;
663
664 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
665 min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
666
667 for (fifo = 1; fifo <= fifo_count; fifo++)
668 total += hsotg->params.g_tx_fifo_size[fifo];
669
670 if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
671 dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
672 __func__);
673 dwc2_set_param_tx_fifo_sizes(hsotg);
674 }
675
676 for (fifo = 1; fifo <= fifo_count; fifo++) {
677 dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
678
679 if (hsotg->params.g_tx_fifo_size[fifo] < min ||
680 hsotg->params.g_tx_fifo_size[fifo] > dptxfszn) {
681 dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
682 __func__, fifo,
683 hsotg->params.g_tx_fifo_size[fifo]);
684 hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
685 }
686 }
687}
688
689#define CHECK_RANGE(_param, _min, _max, _def) do { \
690 if ((int)(hsotg->params._param) < (_min) || \
691 (hsotg->params._param) > (_max)) { \
692 dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
693 __func__, #_param, hsotg->params._param); \
694 hsotg->params._param = (_def); \
695 } \
696 } while (0)
697
698#define CHECK_BOOL(_param, _check) do { \
699 if (hsotg->params._param && !(_check)) { \
700 dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
701 __func__, #_param, hsotg->params._param); \
702 hsotg->params._param = false; \
703 } \
704 } while (0)
705
706static void dwc2_check_params(struct dwc2_hsotg *hsotg)
707{
708 struct dwc2_hw_params *hw = &hsotg->hw_params;
709 struct dwc2_core_params *p = &hsotg->params;
710 bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
711
712 dwc2_check_param_otg_cap(hsotg);
713 dwc2_check_param_phy_type(hsotg);
714 dwc2_check_param_speed(hsotg);
715 dwc2_check_param_phy_utmi_width(hsotg);
716 dwc2_check_param_power_down(hsotg);
717 CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
718 CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
719 CHECK_BOOL(i2c_enable, hw->i2c_enable);
720 CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
721 CHECK_BOOL(acg_enable, hw->acg_enable);
722 CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
723 CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
724 CHECK_BOOL(lpm, hw->lpm_mode);
725 CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
726 CHECK_BOOL(besl, hsotg->params.lpm);
727 CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
728 CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
729 CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
730 CHECK_BOOL(service_interval, hw->service_interval_mode);
731 CHECK_RANGE(max_packet_count,
732 15, hw->max_packet_count,
733 hw->max_packet_count);
734 CHECK_RANGE(max_transfer_size,
735 2047, hw->max_transfer_size,
736 hw->max_transfer_size);
737
738 if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
739 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
740 CHECK_BOOL(host_dma, dma_capable);
741 CHECK_BOOL(dma_desc_enable, p->host_dma);
742 CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
743 CHECK_BOOL(host_ls_low_power_phy_clk,
744 p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
745 CHECK_RANGE(host_channels,
746 1, hw->host_channels,
747 hw->host_channels);
748 CHECK_RANGE(host_rx_fifo_size,
749 16, hw->rx_fifo_size,
750 hw->rx_fifo_size);
751 CHECK_RANGE(host_nperio_tx_fifo_size,
752 16, hw->host_nperio_tx_fifo_size,
753 hw->host_nperio_tx_fifo_size);
754 CHECK_RANGE(host_perio_tx_fifo_size,
755 16, hw->host_perio_tx_fifo_size,
756 hw->host_perio_tx_fifo_size);
757 }
758
759 if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
760 (hsotg->dr_mode == USB_DR_MODE_OTG)) {
761 CHECK_BOOL(g_dma, dma_capable);
762 CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
763 CHECK_RANGE(g_rx_fifo_size,
764 16, hw->rx_fifo_size,
765 hw->rx_fifo_size);
766 CHECK_RANGE(g_np_tx_fifo_size,
767 16, hw->dev_nperio_tx_fifo_size,
768 hw->dev_nperio_tx_fifo_size);
769 dwc2_check_param_tx_fifo_sizes(hsotg);
770 }
771}
772
773/*
774 * Gets host hardware parameters. Forces host mode if not currently in
775 * host mode. Should be called immediately after a core soft reset in
776 * order to get the reset values.
777 */
778static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
779{
780 struct dwc2_hw_params *hw = &hsotg->hw_params;
781 u32 gnptxfsiz;
782 u32 hptxfsiz;
783
784 if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
785 return;
786
787 dwc2_force_mode(hsotg, true);
788
789 gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
790 hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
791
792 hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
793 FIFOSIZE_DEPTH_SHIFT;
794 hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
795 FIFOSIZE_DEPTH_SHIFT;
796}
797
798/*
799 * Gets device hardware parameters. Forces device mode if not
800 * currently in device mode. Should be called immediately after a core
801 * soft reset in order to get the reset values.
802 */
803static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
804{
805 struct dwc2_hw_params *hw = &hsotg->hw_params;
806 u32 gnptxfsiz;
807 int fifo, fifo_count;
808
809 if (hsotg->dr_mode == USB_DR_MODE_HOST)
810 return;
811
812 dwc2_force_mode(hsotg, false);
813
814 gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
815
816 fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
817
818 for (fifo = 1; fifo <= fifo_count; fifo++) {
819 hw->g_tx_fifo_size[fifo] =
820 (dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
821 FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
822 }
823
824 hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
825 FIFOSIZE_DEPTH_SHIFT;
826}
827
828/**
829 * dwc2_get_hwparams() - During device initialization, read various hardware
830 * configuration registers and interpret the contents.
831 *
832 * @hsotg: Programming view of the DWC_otg controller
833 *
834 */
835int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
836{
837 struct dwc2_hw_params *hw = &hsotg->hw_params;
838 unsigned int width;
839 u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
840 u32 grxfsiz;
841
842 hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
843 hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
844 hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
845 hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
846 grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
847
848 /* hwcfg1 */
849 hw->dev_ep_dirs = hwcfg1;
850
851 /* hwcfg2 */
852 hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
853 GHWCFG2_OP_MODE_SHIFT;
854 hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
855 GHWCFG2_ARCHITECTURE_SHIFT;
856 hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
857 hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
858 GHWCFG2_NUM_HOST_CHAN_SHIFT);
859 hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
860 GHWCFG2_HS_PHY_TYPE_SHIFT;
861 hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
862 GHWCFG2_FS_PHY_TYPE_SHIFT;
863 hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
864 GHWCFG2_NUM_DEV_EP_SHIFT;
865 hw->nperio_tx_q_depth =
866 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
867 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
868 hw->host_perio_tx_q_depth =
869 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
870 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
871 hw->dev_token_q_depth =
872 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
873 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
874
875 /* hwcfg3 */
876 width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
877 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
878 hw->max_transfer_size = (1 << (width + 11)) - 1;
879 width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
880 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
881 hw->max_packet_count = (1 << (width + 4)) - 1;
882 hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
883 hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
884 GHWCFG3_DFIFO_DEPTH_SHIFT;
885 hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
886
887 /* hwcfg4 */
888 hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
889 hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
890 GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
891 hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
892 GHWCFG4_NUM_IN_EPS_SHIFT;
893 hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
894 hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
895 hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
896 hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
897 GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
898 hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
899 hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
900 hw->service_interval_mode = !!(hwcfg4 &
901 GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
902
903 /* fifo sizes */
904 hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
905 GRXFSIZ_DEPTH_SHIFT;
906 /*
907 * Host specific hardware parameters. Reading these parameters
908 * requires the controller to be in host mode. The mode will
909 * be forced, if necessary, to read these values.
910 */
911 dwc2_get_host_hwparams(hsotg);
912 dwc2_get_dev_hwparams(hsotg);
913
914 return 0;
915}
916
917typedef void (*set_params_cb)(struct dwc2_hsotg *data);
918
919int dwc2_init_params(struct dwc2_hsotg *hsotg)
920{
921 const struct of_device_id *match;
922 set_params_cb set_params;
923
924 dwc2_set_default_params(hsotg);
925 dwc2_get_device_properties(hsotg);
926
927 match = of_match_device(dwc2_of_match_table, hsotg->dev);
928 if (match && match->data) {
929 set_params = match->data;
930 set_params(hsotg);
931 } else {
932 const struct acpi_device_id *amatch;
933
934 amatch = acpi_match_device(dwc2_acpi_match, hsotg->dev);
935 if (amatch && amatch->driver_data) {
936 set_params = (set_params_cb)amatch->driver_data;
937 set_params(hsotg);
938 }
939 }
940
941 dwc2_check_params(hsotg);
942
943 return 0;
944}