drivers/usb/dwc2/params.c

   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
  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
  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 = DWC2_POWER_DOWN_PARAM_NONE;
  72 }
  73
  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 = DWC2_POWER_DOWN_PARAM_NONE;
  79         p->phy_utmi_width = 8;
  80 }
  81
  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 = DWC2_POWER_DOWN_PARAM_NONE;
  93 }
  94
  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
 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
 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
 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
 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
 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 static 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
 183 static 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 = !device_property_read_bool(hsotg->dev, "usb-role-switch");
 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
 195 const struct of_device_id dwc2_of_match_table[] = {
 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" },
 202         { .compatible = "samsung,s3c6400-hsotg",
 203           .data = dwc2_set_s3c6400_params },
 204         { .compatible = "amlogic,meson8-usb",
 205           .data = dwc2_set_amlogic_params },
 206         { .compatible = "amlogic,meson8b-usb",
 207           .data = dwc2_set_amlogic_params },
 208         { .compatible = "amlogic,meson-gxbb-usb",
 209           .data = dwc2_set_amlogic_params },
 210         { .compatible = "amlogic,meson-g12a-usb",
 211           .data = dwc2_set_amlogic_g12a_params },
 212         { .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
 213         { .compatible = "apm,apm82181-dwc-otg", .data = dwc2_set_amcc_params },
 214         { .compatible = "st,stm32f4x9-fsotg",
 215           .data = dwc2_set_stm32f4x9_fsotg_params },
 216         { .compatible = "st,stm32f4x9-hsotg" },
 217         { .compatible = "st,stm32f7-hsotg",
 218           .data = dwc2_set_stm32f7_hsotg_params },
 219         { .compatible = "st,stm32mp15-fsotg",
 220           .data = dwc2_set_stm32mp15_fsotg_params },
 221         { .compatible = "st,stm32mp15-hsotg",
 222           .data = dwc2_set_stm32mp15_hsotg_params },
 223         {},
 224 };
 225 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
 226
 227 static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
 228 {
 229         u8 val;
 230
 231         switch (hsotg->hw_params.op_mode) {
 232         case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
 233                 val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
 234                 break;
 235         case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
 236         case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
 237         case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
 238                 val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
 239                 break;
 240         default:
 241                 val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
 242                 break;
 243         }
 244
 245         hsotg->params.otg_cap = val;
 246 }
 247
 248 static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
 249 {
 250         int val;
 251         u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
 252
 253         val = DWC2_PHY_TYPE_PARAM_FS;
 254         if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
 255                 if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
 256                     hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
 257                         val = DWC2_PHY_TYPE_PARAM_UTMI;
 258                 else
 259                         val = DWC2_PHY_TYPE_PARAM_ULPI;
 260         }
 261
 262         if (dwc2_is_fs_iot(hsotg))
 263                 hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
 264
 265         hsotg->params.phy_type = val;
 266 }
 267
 268 static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
 269 {
 270         int val;
 271
 272         val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
 273                 DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
 274
 275         if (dwc2_is_fs_iot(hsotg))
 276                 val = DWC2_SPEED_PARAM_FULL;
 277
 278         if (dwc2_is_hs_iot(hsotg))
 279                 val = DWC2_SPEED_PARAM_HIGH;
 280
 281         hsotg->params.speed = val;
 282 }
 283
 284 static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 285 {
 286         int val;
 287
 288         val = (hsotg->hw_params.utmi_phy_data_width ==
 289                GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
 290
 291         if (hsotg->phy) {
 292                 /*
 293                  * If using the generic PHY framework, check if the PHY bus
 294                  * width is 8-bit and set the phyif appropriately.
 295                  */
 296                 if (phy_get_bus_width(hsotg->phy) == 8)
 297                         val = 8;
 298         }
 299
 300         hsotg->params.phy_utmi_width = val;
 301 }
 302
 303 static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 304 {
 305         struct dwc2_core_params *p = &hsotg->params;
 306         int depth_average;
 307         int fifo_count;
 308         int i;
 309
 310         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 311
 312         memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
 313         depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
 314         for (i = 1; i <= fifo_count; i++)
 315                 p->g_tx_fifo_size[i] = depth_average;
 316 }
 317
 318 static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
 319 {
 320         int val;
 321
 322         if (hsotg->hw_params.hibernation)
 323                 val = DWC2_POWER_DOWN_PARAM_HIBERNATION;
 324         else if (hsotg->hw_params.power_optimized)
 325                 val = DWC2_POWER_DOWN_PARAM_PARTIAL;
 326         else
 327                 val = DWC2_POWER_DOWN_PARAM_NONE;
 328
 329         hsotg->params.power_down = val;
 330 }
 331
 332 static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
 333 {
 334         struct dwc2_core_params *p = &hsotg->params;
 335
 336         p->lpm = hsotg->hw_params.lpm_mode;
 337         if (p->lpm) {
 338                 p->lpm_clock_gating = true;
 339                 p->besl = true;
 340                 p->hird_threshold_en = true;
 341                 p->hird_threshold = 4;
 342         } else {
 343                 p->lpm_clock_gating = false;
 344                 p->besl = false;
 345                 p->hird_threshold_en = false;
 346         }
 347 }
 348
 349 /**
 350  * dwc2_set_default_params() - Set all core parameters to their
 351  * auto-detected default values.
 352  *
 353  * @hsotg: Programming view of the DWC_otg controller
 354  *
 355  */
 356 static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
 357 {
 358         struct dwc2_hw_params *hw = &hsotg->hw_params;
 359         struct dwc2_core_params *p = &hsotg->params;
 360         bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 361
 362         dwc2_set_param_otg_cap(hsotg);
 363         dwc2_set_param_phy_type(hsotg);
 364         dwc2_set_param_speed(hsotg);
 365         dwc2_set_param_phy_utmi_width(hsotg);
 366         dwc2_set_param_power_down(hsotg);
 367         dwc2_set_param_lpm(hsotg);
 368         p->phy_ulpi_ddr = false;
 369         p->phy_ulpi_ext_vbus = false;
 370
 371         p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
 372         p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
 373         p->i2c_enable = hw->i2c_enable;
 374         p->acg_enable = hw->acg_enable;
 375         p->ulpi_fs_ls = false;
 376         p->ts_dline = false;
 377         p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
 378         p->uframe_sched = true;
 379         p->external_id_pin_ctl = false;
 380         p->ipg_isoc_en = false;
 381         p->service_interval = false;
 382         p->max_packet_count = hw->max_packet_count;
 383         p->max_transfer_size = hw->max_transfer_size;
 384         p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
 385         p->ref_clk_per = 33333;
 386         p->sof_cnt_wkup_alert = 100;
 387
 388         if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
 389             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 390                 p->host_dma = dma_capable;
 391                 p->dma_desc_enable = false;
 392                 p->dma_desc_fs_enable = false;
 393                 p->host_support_fs_ls_low_power = false;
 394                 p->host_ls_low_power_phy_clk = false;
 395                 p->host_channels = hw->host_channels;
 396                 p->host_rx_fifo_size = hw->rx_fifo_size;
 397                 p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
 398                 p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
 399         }
 400
 401         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 402             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 403                 p->g_dma = dma_capable;
 404                 p->g_dma_desc = hw->dma_desc_enable;
 405
 406                 /*
 407                  * The values for g_rx_fifo_size (2048) and
 408                  * g_np_tx_fifo_size (1024) come from the legacy s3c
 409                  * gadget driver. These defaults have been hard-coded
 410                  * for some time so many platforms depend on these
 411                  * values. Leave them as defaults for now and only
 412                  * auto-detect if the hardware does not support the
 413                  * default.
 414                  */
 415                 p->g_rx_fifo_size = 2048;
 416                 p->g_np_tx_fifo_size = 1024;
 417                 dwc2_set_param_tx_fifo_sizes(hsotg);
 418         }
 419 }
 420
 421 /**
 422  * dwc2_get_device_properties() - Read in device properties.
 423  *
 424  * @hsotg: Programming view of the DWC_otg controller
 425  *
 426  * Read in the device properties and adjust core parameters if needed.
 427  */
 428 static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
 429 {
 430         struct dwc2_core_params *p = &hsotg->params;
 431         int num;
 432
 433         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 434             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 435                 device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
 436                                          &p->g_rx_fifo_size);
 437
 438                 device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
 439                                          &p->g_np_tx_fifo_size);
 440
 441                 num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
 442                 if (num > 0) {
 443                         num = min(num, 15);
 444                         memset(p->g_tx_fifo_size, 0,
 445                                sizeof(p->g_tx_fifo_size));
 446                         device_property_read_u32_array(hsotg->dev,
 447                                                        "g-tx-fifo-size",
 448                                                        &p->g_tx_fifo_size[1],
 449                                                        num);
 450                 }
 451         }
 452
 453         if (of_find_property(hsotg->dev->of_node, "disable-over-current", NULL))
 454                 p->oc_disable = true;
 455 }
 456
 457 static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
 458 {
 459         int valid = 1;
 460
 461         switch (hsotg->params.otg_cap) {
 462         case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
 463                 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
 464                         valid = 0;
 465                 break;
 466         case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
 467                 switch (hsotg->hw_params.op_mode) {
 468                 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
 469                 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
 470                 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
 471                 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
 472                         break;
 473                 default:
 474                         valid = 0;
 475                         break;
 476                 }
 477                 break;
 478         case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
 479                 /* always valid */
 480                 break;
 481         default:
 482                 valid = 0;
 483                 break;
 484         }
 485
 486         if (!valid)
 487                 dwc2_set_param_otg_cap(hsotg);
 488 }
 489
 490 static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
 491 {
 492         int valid = 0;
 493         u32 hs_phy_type;
 494         u32 fs_phy_type;
 495
 496         hs_phy_type = hsotg->hw_params.hs_phy_type;
 497         fs_phy_type = hsotg->hw_params.fs_phy_type;
 498
 499         switch (hsotg->params.phy_type) {
 500         case DWC2_PHY_TYPE_PARAM_FS:
 501                 if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
 502                         valid = 1;
 503                 break;
 504         case DWC2_PHY_TYPE_PARAM_UTMI:
 505                 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
 506                     (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
 507                         valid = 1;
 508                 break;
 509         case DWC2_PHY_TYPE_PARAM_ULPI:
 510                 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
 511                     (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
 512                         valid = 1;
 513                 break;
 514         default:
 515                 break;
 516         }
 517
 518         if (!valid)
 519                 dwc2_set_param_phy_type(hsotg);
 520 }
 521
 522 static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
 523 {
 524         int valid = 1;
 525         int phy_type = hsotg->params.phy_type;
 526         int speed = hsotg->params.speed;
 527
 528         switch (speed) {
 529         case DWC2_SPEED_PARAM_HIGH:
 530                 if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
 531                     (phy_type == DWC2_PHY_TYPE_PARAM_FS))
 532                         valid = 0;
 533                 break;
 534         case DWC2_SPEED_PARAM_FULL:
 535         case DWC2_SPEED_PARAM_LOW:
 536                 break;
 537         default:
 538                 valid = 0;
 539                 break;
 540         }
 541
 542         if (!valid)
 543                 dwc2_set_param_speed(hsotg);
 544 }
 545
 546 static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 547 {
 548         int valid = 0;
 549         int param = hsotg->params.phy_utmi_width;
 550         int width = hsotg->hw_params.utmi_phy_data_width;
 551
 552         switch (width) {
 553         case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
 554                 valid = (param == 8);
 555                 break;
 556         case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
 557                 valid = (param == 16);
 558                 break;
 559         case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
 560                 valid = (param == 8 || param == 16);
 561                 break;
 562         }
 563
 564         if (!valid)
 565                 dwc2_set_param_phy_utmi_width(hsotg);
 566 }
 567
 568 static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
 569 {
 570         int param = hsotg->params.power_down;
 571
 572         switch (param) {
 573         case DWC2_POWER_DOWN_PARAM_NONE:
 574                 break;
 575         case DWC2_POWER_DOWN_PARAM_PARTIAL:
 576                 if (hsotg->hw_params.power_optimized)
 577                         break;
 578                 dev_dbg(hsotg->dev,
 579                         "Partial power down isn't supported by HW\n");
 580                 param = DWC2_POWER_DOWN_PARAM_NONE;
 581                 break;
 582         case DWC2_POWER_DOWN_PARAM_HIBERNATION:
 583                 if (hsotg->hw_params.hibernation)
 584                         break;
 585                 dev_dbg(hsotg->dev,
 586                         "Hibernation isn't supported by HW\n");
 587                 param = DWC2_POWER_DOWN_PARAM_NONE;
 588                 break;
 589         default:
 590                 dev_err(hsotg->dev,
 591                         "%s: Invalid parameter power_down=%d\n",
 592                         __func__, param);
 593                 param = DWC2_POWER_DOWN_PARAM_NONE;
 594                 break;
 595         }
 596
 597         hsotg->params.power_down = param;
 598 }
 599
 600 static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 601 {
 602         int fifo_count;
 603         int fifo;
 604         int min;
 605         u32 total = 0;
 606         u32 dptxfszn;
 607
 608         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 609         min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
 610
 611         for (fifo = 1; fifo <= fifo_count; fifo++)
 612                 total += hsotg->params.g_tx_fifo_size[fifo];
 613
 614         if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
 615                 dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
 616                          __func__);
 617                 dwc2_set_param_tx_fifo_sizes(hsotg);
 618         }
 619
 620         for (fifo = 1; fifo <= fifo_count; fifo++) {
 621                 dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
 622
 623                 if (hsotg->params.g_tx_fifo_size[fifo] < min ||
 624                     hsotg->params.g_tx_fifo_size[fifo] >  dptxfszn) {
 625                         dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
 626                                  __func__, fifo,
 627                                  hsotg->params.g_tx_fifo_size[fifo]);
 628                         hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
 629                 }
 630         }
 631 }
 632
 633 #define CHECK_RANGE(_param, _min, _max, _def) do {                      \
 634                 if ((int)(hsotg->params._param) < (_min) ||             \
 635                     (hsotg->params._param) > (_max)) {                  \
 636                         dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
 637                                  __func__, #_param, hsotg->params._param); \
 638                         hsotg->params._param = (_def);                  \
 639                 }                                                       \
 640         } while (0)
 641
 642 #define CHECK_BOOL(_param, _check) do {                                 \
 643                 if (hsotg->params._param && !(_check)) {                \
 644                         dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
 645                                  __func__, #_param, hsotg->params._param); \
 646                         hsotg->params._param = false;                   \
 647                 }                                                       \
 648         } while (0)
 649
 650 static void dwc2_check_params(struct dwc2_hsotg *hsotg)
 651 {
 652         struct dwc2_hw_params *hw = &hsotg->hw_params;
 653         struct dwc2_core_params *p = &hsotg->params;
 654         bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 655
 656         dwc2_check_param_otg_cap(hsotg);
 657         dwc2_check_param_phy_type(hsotg);
 658         dwc2_check_param_speed(hsotg);
 659         dwc2_check_param_phy_utmi_width(hsotg);
 660         dwc2_check_param_power_down(hsotg);
 661         CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
 662         CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
 663         CHECK_BOOL(i2c_enable, hw->i2c_enable);
 664         CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
 665         CHECK_BOOL(acg_enable, hw->acg_enable);
 666         CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
 667         CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
 668         CHECK_BOOL(lpm, hw->lpm_mode);
 669         CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
 670         CHECK_BOOL(besl, hsotg->params.lpm);
 671         CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
 672         CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
 673         CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
 674         CHECK_BOOL(service_interval, hw->service_interval_mode);
 675         CHECK_RANGE(max_packet_count,
 676                     15, hw->max_packet_count,
 677                     hw->max_packet_count);
 678         CHECK_RANGE(max_transfer_size,
 679                     2047, hw->max_transfer_size,
 680                     hw->max_transfer_size);
 681
 682         if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
 683             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 684                 CHECK_BOOL(host_dma, dma_capable);
 685                 CHECK_BOOL(dma_desc_enable, p->host_dma);
 686                 CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
 687                 CHECK_BOOL(host_ls_low_power_phy_clk,
 688                            p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
 689                 CHECK_RANGE(host_channels,
 690                             1, hw->host_channels,
 691                             hw->host_channels);
 692                 CHECK_RANGE(host_rx_fifo_size,
 693                             16, hw->rx_fifo_size,
 694                             hw->rx_fifo_size);
 695                 CHECK_RANGE(host_nperio_tx_fifo_size,
 696                             16, hw->host_nperio_tx_fifo_size,
 697                             hw->host_nperio_tx_fifo_size);
 698                 CHECK_RANGE(host_perio_tx_fifo_size,
 699                             16, hw->host_perio_tx_fifo_size,
 700                             hw->host_perio_tx_fifo_size);
 701         }
 702
 703         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 704             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 705                 CHECK_BOOL(g_dma, dma_capable);
 706                 CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
 707                 CHECK_RANGE(g_rx_fifo_size,
 708                             16, hw->rx_fifo_size,
 709                             hw->rx_fifo_size);
 710                 CHECK_RANGE(g_np_tx_fifo_size,
 711                             16, hw->dev_nperio_tx_fifo_size,
 712                             hw->dev_nperio_tx_fifo_size);
 713                 dwc2_check_param_tx_fifo_sizes(hsotg);
 714         }
 715 }
 716
 717 /*
 718  * Gets host hardware parameters. Forces host mode if not currently in
 719  * host mode. Should be called immediately after a core soft reset in
 720  * order to get the reset values.
 721  */
 722 static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
 723 {
 724         struct dwc2_hw_params *hw = &hsotg->hw_params;
 725         u32 gnptxfsiz;
 726         u32 hptxfsiz;
 727
 728         if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
 729                 return;
 730
 731         dwc2_force_mode(hsotg, true);
 732
 733         gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
 734         hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
 735
 736         hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 737                                        FIFOSIZE_DEPTH_SHIFT;
 738         hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 739                                       FIFOSIZE_DEPTH_SHIFT;
 740 }
 741
 742 /*
 743  * Gets device hardware parameters. Forces device mode if not
 744  * currently in device mode. Should be called immediately after a core
 745  * soft reset in order to get the reset values.
 746  */
 747 static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
 748 {
 749         struct dwc2_hw_params *hw = &hsotg->hw_params;
 750         u32 gnptxfsiz;
 751         int fifo, fifo_count;
 752
 753         if (hsotg->dr_mode == USB_DR_MODE_HOST)
 754                 return;
 755
 756         dwc2_force_mode(hsotg, false);
 757
 758         gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
 759
 760         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 761
 762         for (fifo = 1; fifo <= fifo_count; fifo++) {
 763                 hw->g_tx_fifo_size[fifo] =
 764                         (dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
 765                          FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
 766         }
 767
 768         hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 769                                        FIFOSIZE_DEPTH_SHIFT;
 770 }
 771
 772 /**
 773  * During device initialization, read various hardware configuration
 774  * registers and interpret the contents.
 775  *
 776  * @hsotg: Programming view of the DWC_otg controller
 777  *
 778  */
 779 int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
 780 {
 781         struct dwc2_hw_params *hw = &hsotg->hw_params;
 782         unsigned int width;
 783         u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
 784         u32 grxfsiz;
 785
 786         hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
 787         hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
 788         hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
 789         hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
 790         grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
 791
 792         /* hwcfg1 */
 793         hw->dev_ep_dirs = hwcfg1;
 794
 795         /* hwcfg2 */
 796         hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
 797                       GHWCFG2_OP_MODE_SHIFT;
 798         hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
 799                    GHWCFG2_ARCHITECTURE_SHIFT;
 800         hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
 801         hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
 802                                 GHWCFG2_NUM_HOST_CHAN_SHIFT);
 803         hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
 804                           GHWCFG2_HS_PHY_TYPE_SHIFT;
 805         hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
 806                           GHWCFG2_FS_PHY_TYPE_SHIFT;
 807         hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
 808                          GHWCFG2_NUM_DEV_EP_SHIFT;
 809         hw->nperio_tx_q_depth =
 810                 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
 811                 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
 812         hw->host_perio_tx_q_depth =
 813                 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
 814                 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
 815         hw->dev_token_q_depth =
 816                 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
 817                 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
 818
 819         /* hwcfg3 */
 820         width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
 821                 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
 822         hw->max_transfer_size = (1 << (width + 11)) - 1;
 823         width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
 824                 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
 825         hw->max_packet_count = (1 << (width + 4)) - 1;
 826         hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
 827         hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
 828                               GHWCFG3_DFIFO_DEPTH_SHIFT;
 829         hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
 830
 831         /* hwcfg4 */
 832         hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
 833         hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
 834                                   GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
 835         hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
 836                              GHWCFG4_NUM_IN_EPS_SHIFT;
 837         hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
 838         hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
 839         hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
 840         hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
 841                                   GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
 842         hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
 843         hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
 844         hw->service_interval_mode = !!(hwcfg4 &
 845                                        GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
 846
 847         /* fifo sizes */
 848         hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
 849                                 GRXFSIZ_DEPTH_SHIFT;
 850         /*
 851          * Host specific hardware parameters. Reading these parameters
 852          * requires the controller to be in host mode. The mode will
 853          * be forced, if necessary, to read these values.
 854          */
 855         dwc2_get_host_hwparams(hsotg);
 856         dwc2_get_dev_hwparams(hsotg);
 857
 858         return 0;
 859 }
 860
 861 int dwc2_init_params(struct dwc2_hsotg *hsotg)
 862 {
 863         const struct of_device_id *match;
 864         void (*set_params)(struct dwc2_hsotg *data);
 865
 866         dwc2_set_default_params(hsotg);
 867         dwc2_get_device_properties(hsotg);
 868
 869         match = of_match_device(dwc2_of_match_table, hsotg->dev);
 870         if (match && match->data) {
 871                 set_params = match->data;
 872                 set_params(hsotg);
 873         }
 874
 875         dwc2_check_params(hsotg);
 876
 877         return 0;
 878 }