drivers/usb/dwc2/params.c

   1 /*
   2  * Copyright (C) 2004-2016 Synopsys, Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions, and the following disclaimer,
   9  *    without modification.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The names of the above-listed copyright holders may not be used
  14  *    to endorse or promote products derived from this software without
  15  *    specific prior written permission.
  16  *
  17  * ALTERNATIVELY, this software may be distributed under the terms of the
  18  * GNU General Public License ("GPL") as published by the Free Software
  19  * Foundation; either version 2 of the License, or (at your option) any
  20  * later version.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  23  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  25  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  26  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  27  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  29  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  30  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  31  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  32  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/module.h>
  37 #include <linux/of_device.h>
  38
  39 #include "core.h"
  40
  41 static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
  42 {
  43         struct dwc2_core_params *p = &hsotg->params;
  44
  45         p->host_rx_fifo_size = 774;
  46         p->max_transfer_size = 65535;
  47         p->max_packet_count = 511;
  48         p->ahbcfg = 0x10;
  49         p->uframe_sched = false;
  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->uframe_sched = false;
  71         p->change_speed_quirk = true;
  72 }
  73
  74 static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
  75 {
  76         struct dwc2_core_params *p = &hsotg->params;
  77
  78         p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
  79         p->host_rx_fifo_size = 525;
  80         p->host_nperio_tx_fifo_size = 128;
  81         p->host_perio_tx_fifo_size = 256;
  82         p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
  83                 GAHBCFG_HBSTLEN_SHIFT;
  84 }
  85
  86 static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)
  87 {
  88         struct dwc2_core_params *p = &hsotg->params;
  89
  90         p->otg_cap = 2;
  91         p->host_rx_fifo_size = 288;
  92         p->host_nperio_tx_fifo_size = 128;
  93         p->host_perio_tx_fifo_size = 96;
  94         p->max_transfer_size = 65535;
  95         p->max_packet_count = 511;
  96         p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
  97                 GAHBCFG_HBSTLEN_SHIFT;
  98 }
  99
 100 static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
 101 {
 102         struct dwc2_core_params *p = &hsotg->params;
 103
 104         p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
 105         p->speed = DWC2_SPEED_PARAM_HIGH;
 106         p->host_rx_fifo_size = 512;
 107         p->host_nperio_tx_fifo_size = 500;
 108         p->host_perio_tx_fifo_size = 500;
 109         p->host_channels = 16;
 110         p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
 111         p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 <<
 112                 GAHBCFG_HBSTLEN_SHIFT;
 113         p->uframe_sched = false;
 114 }
 115
 116 static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
 117 {
 118         struct dwc2_core_params *p = &hsotg->params;
 119
 120         p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
 121 }
 122
 123 static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
 124 {
 125         struct dwc2_core_params *p = &hsotg->params;
 126
 127         p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
 128         p->speed = DWC2_SPEED_PARAM_FULL;
 129         p->host_rx_fifo_size = 128;
 130         p->host_nperio_tx_fifo_size = 96;
 131         p->host_perio_tx_fifo_size = 96;
 132         p->max_packet_count = 256;
 133         p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
 134         p->i2c_enable = false;
 135         p->uframe_sched = false;
 136         p->activate_stm_fs_transceiver = true;
 137 }
 138
 139 const struct of_device_id dwc2_of_match_table[] = {
 140         { .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
 141         { .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
 142         { .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
 143         { .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
 144         { .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
 145         { .compatible = "snps,dwc2" },
 146         { .compatible = "samsung,s3c6400-hsotg" },
 147         { .compatible = "amlogic,meson8b-usb",
 148           .data = dwc2_set_amlogic_params },
 149         { .compatible = "amlogic,meson-gxbb-usb",
 150           .data = dwc2_set_amlogic_params },
 151         { .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
 152         { .compatible = "st,stm32f4x9-fsotg",
 153           .data = dwc2_set_stm32f4x9_fsotg_params },
 154         { .compatible = "st,stm32f4x9-hsotg" },
 155         {},
 156 };
 157 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
 158
 159 static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
 160 {
 161         u8 val;
 162
 163         switch (hsotg->hw_params.op_mode) {
 164         case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
 165                 val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
 166                 break;
 167         case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
 168         case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
 169         case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
 170                 val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
 171                 break;
 172         default:
 173                 val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
 174                 break;
 175         }
 176
 177         hsotg->params.otg_cap = val;
 178 }
 179
 180 static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
 181 {
 182         int val;
 183         u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
 184
 185         val = DWC2_PHY_TYPE_PARAM_FS;
 186         if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
 187                 if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
 188                     hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
 189                         val = DWC2_PHY_TYPE_PARAM_UTMI;
 190                 else
 191                         val = DWC2_PHY_TYPE_PARAM_ULPI;
 192         }
 193
 194         if (dwc2_is_fs_iot(hsotg))
 195                 hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
 196
 197         hsotg->params.phy_type = val;
 198 }
 199
 200 static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
 201 {
 202         int val;
 203
 204         val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
 205                 DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
 206
 207         if (dwc2_is_fs_iot(hsotg))
 208                 val = DWC2_SPEED_PARAM_FULL;
 209
 210         if (dwc2_is_hs_iot(hsotg))
 211                 val = DWC2_SPEED_PARAM_HIGH;
 212
 213         hsotg->params.speed = val;
 214 }
 215
 216 static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 217 {
 218         int val;
 219
 220         val = (hsotg->hw_params.utmi_phy_data_width ==
 221                GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
 222
 223         hsotg->params.phy_utmi_width = val;
 224 }
 225
 226 static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 227 {
 228         struct dwc2_core_params *p = &hsotg->params;
 229         int depth_average;
 230         int fifo_count;
 231         int i;
 232
 233         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 234
 235         memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
 236         depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
 237         for (i = 1; i <= fifo_count; i++)
 238                 p->g_tx_fifo_size[i] = depth_average;
 239 }
 240
 241 /**
 242  * dwc2_set_default_params() - Set all core parameters to their
 243  * auto-detected default values.
 244  */
 245 static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
 246 {
 247         struct dwc2_hw_params *hw = &hsotg->hw_params;
 248         struct dwc2_core_params *p = &hsotg->params;
 249         bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 250
 251         dwc2_set_param_otg_cap(hsotg);
 252         dwc2_set_param_phy_type(hsotg);
 253         dwc2_set_param_speed(hsotg);
 254         dwc2_set_param_phy_utmi_width(hsotg);
 255         p->phy_ulpi_ddr = false;
 256         p->phy_ulpi_ext_vbus = false;
 257
 258         p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
 259         p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
 260         p->i2c_enable = hw->i2c_enable;
 261         p->ulpi_fs_ls = false;
 262         p->ts_dline = false;
 263         p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
 264         p->uframe_sched = true;
 265         p->external_id_pin_ctl = false;
 266         p->hibernation = false;
 267         p->max_packet_count = hw->max_packet_count;
 268         p->max_transfer_size = hw->max_transfer_size;
 269         p->ahbcfg = GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT;
 270
 271         if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
 272             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 273                 p->host_dma = dma_capable;
 274                 p->dma_desc_enable = false;
 275                 p->dma_desc_fs_enable = false;
 276                 p->host_support_fs_ls_low_power = false;
 277                 p->host_ls_low_power_phy_clk = false;
 278                 p->host_channels = hw->host_channels;
 279                 p->host_rx_fifo_size = hw->rx_fifo_size;
 280                 p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
 281                 p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
 282         }
 283
 284         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 285             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 286                 p->g_dma = dma_capable;
 287                 p->g_dma_desc = hw->dma_desc_enable;
 288
 289                 /*
 290                  * The values for g_rx_fifo_size (2048) and
 291                  * g_np_tx_fifo_size (1024) come from the legacy s3c
 292                  * gadget driver. These defaults have been hard-coded
 293                  * for some time so many platforms depend on these
 294                  * values. Leave them as defaults for now and only
 295                  * auto-detect if the hardware does not support the
 296                  * default.
 297                  */
 298                 p->g_rx_fifo_size = 2048;
 299                 p->g_np_tx_fifo_size = 1024;
 300                 dwc2_set_param_tx_fifo_sizes(hsotg);
 301         }
 302 }
 303
 304 /**
 305  * dwc2_get_device_properties() - Read in device properties.
 306  *
 307  * Read in the device properties and adjust core parameters if needed.
 308  */
 309 static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
 310 {
 311         struct dwc2_core_params *p = &hsotg->params;
 312         int num;
 313
 314         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 315             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 316                 device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
 317                                          &p->g_rx_fifo_size);
 318
 319                 device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
 320                                          &p->g_np_tx_fifo_size);
 321
 322                 num = device_property_read_u32_array(hsotg->dev,
 323                                                      "g-tx-fifo-size",
 324                                                      NULL, 0);
 325
 326                 if (num > 0) {
 327                         num = min(num, 15);
 328                         memset(p->g_tx_fifo_size, 0,
 329                                sizeof(p->g_tx_fifo_size));
 330                         device_property_read_u32_array(hsotg->dev,
 331                                                        "g-tx-fifo-size",
 332                                                        &p->g_tx_fifo_size[1],
 333                                                        num);
 334                 }
 335         }
 336 }
 337
 338 static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
 339 {
 340         int valid = 1;
 341
 342         switch (hsotg->params.otg_cap) {
 343         case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
 344                 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
 345                         valid = 0;
 346                 break;
 347         case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
 348                 switch (hsotg->hw_params.op_mode) {
 349                 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
 350                 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
 351                 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
 352                 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
 353                         break;
 354                 default:
 355                         valid = 0;
 356                         break;
 357                 }
 358                 break;
 359         case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
 360                 /* always valid */
 361                 break;
 362         default:
 363                 valid = 0;
 364                 break;
 365         }
 366
 367         if (!valid)
 368                 dwc2_set_param_otg_cap(hsotg);
 369 }
 370
 371 static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
 372 {
 373         int valid = 0;
 374         u32 hs_phy_type;
 375         u32 fs_phy_type;
 376
 377         hs_phy_type = hsotg->hw_params.hs_phy_type;
 378         fs_phy_type = hsotg->hw_params.fs_phy_type;
 379
 380         switch (hsotg->params.phy_type) {
 381         case DWC2_PHY_TYPE_PARAM_FS:
 382                 if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
 383                         valid = 1;
 384                 break;
 385         case DWC2_PHY_TYPE_PARAM_UTMI:
 386                 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
 387                     (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
 388                         valid = 1;
 389                 break;
 390         case DWC2_PHY_TYPE_PARAM_ULPI:
 391                 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
 392                     (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
 393                         valid = 1;
 394                 break;
 395         default:
 396                 break;
 397         }
 398
 399         if (!valid)
 400                 dwc2_set_param_phy_type(hsotg);
 401 }
 402
 403 static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
 404 {
 405         int valid = 1;
 406         int phy_type = hsotg->params.phy_type;
 407         int speed = hsotg->params.speed;
 408
 409         switch (speed) {
 410         case DWC2_SPEED_PARAM_HIGH:
 411                 if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
 412                     (phy_type == DWC2_PHY_TYPE_PARAM_FS))
 413                         valid = 0;
 414                 break;
 415         case DWC2_SPEED_PARAM_FULL:
 416         case DWC2_SPEED_PARAM_LOW:
 417                 break;
 418         default:
 419                 valid = 0;
 420                 break;
 421         }
 422
 423         if (!valid)
 424                 dwc2_set_param_speed(hsotg);
 425 }
 426
 427 static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 428 {
 429         int valid = 0;
 430         int param = hsotg->params.phy_utmi_width;
 431         int width = hsotg->hw_params.utmi_phy_data_width;
 432
 433         switch (width) {
 434         case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
 435                 valid = (param == 8);
 436                 break;
 437         case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
 438                 valid = (param == 16);
 439                 break;
 440         case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
 441                 valid = (param == 8 || param == 16);
 442                 break;
 443         }
 444
 445         if (!valid)
 446                 dwc2_set_param_phy_utmi_width(hsotg);
 447 }
 448
 449 static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 450 {
 451         int fifo_count;
 452         int fifo;
 453         int min;
 454         u32 total = 0;
 455         u32 dptxfszn;
 456
 457         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 458         min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
 459
 460         for (fifo = 1; fifo <= fifo_count; fifo++)
 461                 total += hsotg->params.g_tx_fifo_size[fifo];
 462
 463         if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
 464                 dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
 465                          __func__);
 466                 dwc2_set_param_tx_fifo_sizes(hsotg);
 467         }
 468
 469         for (fifo = 1; fifo <= fifo_count; fifo++) {
 470                 dptxfszn = (dwc2_readl(hsotg->regs + DPTXFSIZN(fifo)) &
 471                         FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
 472
 473                 if (hsotg->params.g_tx_fifo_size[fifo] < min ||
 474                     hsotg->params.g_tx_fifo_size[fifo] >  dptxfszn) {
 475                         dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
 476                                  __func__, fifo,
 477                                  hsotg->params.g_tx_fifo_size[fifo]);
 478                         hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
 479                 }
 480         }
 481 }
 482
 483 #define CHECK_RANGE(_param, _min, _max, _def) do {                      \
 484                 if ((hsotg->params._param) < (_min) ||                  \
 485                     (hsotg->params._param) > (_max)) {                  \
 486                         dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
 487                                  __func__, #_param, hsotg->params._param); \
 488                         hsotg->params._param = (_def);                  \
 489                 }                                                       \
 490         } while (0)
 491
 492 #define CHECK_BOOL(_param, _check) do {                                 \
 493                 if (hsotg->params._param && !(_check)) {                \
 494                         dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
 495                                  __func__, #_param, hsotg->params._param); \
 496                         hsotg->params._param = false;                   \
 497                 }                                                       \
 498         } while (0)
 499
 500 static void dwc2_check_params(struct dwc2_hsotg *hsotg)
 501 {
 502         struct dwc2_hw_params *hw = &hsotg->hw_params;
 503         struct dwc2_core_params *p = &hsotg->params;
 504         bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 505
 506         dwc2_check_param_otg_cap(hsotg);
 507         dwc2_check_param_phy_type(hsotg);
 508         dwc2_check_param_speed(hsotg);
 509         dwc2_check_param_phy_utmi_width(hsotg);
 510         CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
 511         CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
 512         CHECK_BOOL(i2c_enable, hw->i2c_enable);
 513         CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
 514         CHECK_RANGE(max_packet_count,
 515                     15, hw->max_packet_count,
 516                     hw->max_packet_count);
 517         CHECK_RANGE(max_transfer_size,
 518                     2047, hw->max_transfer_size,
 519                     hw->max_transfer_size);
 520
 521         if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
 522             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 523                 CHECK_BOOL(host_dma, dma_capable);
 524                 CHECK_BOOL(dma_desc_enable, p->host_dma);
 525                 CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
 526                 CHECK_BOOL(host_ls_low_power_phy_clk,
 527                            p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
 528                 CHECK_RANGE(host_channels,
 529                             1, hw->host_channels,
 530                             hw->host_channels);
 531                 CHECK_RANGE(host_rx_fifo_size,
 532                             16, hw->rx_fifo_size,
 533                             hw->rx_fifo_size);
 534                 CHECK_RANGE(host_nperio_tx_fifo_size,
 535                             16, hw->host_nperio_tx_fifo_size,
 536                             hw->host_nperio_tx_fifo_size);
 537                 CHECK_RANGE(host_perio_tx_fifo_size,
 538                             16, hw->host_perio_tx_fifo_size,
 539                             hw->host_perio_tx_fifo_size);
 540         }
 541
 542         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 543             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 544                 CHECK_BOOL(g_dma, dma_capable);
 545                 CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
 546                 CHECK_RANGE(g_rx_fifo_size,
 547                             16, hw->rx_fifo_size,
 548                             hw->rx_fifo_size);
 549                 CHECK_RANGE(g_np_tx_fifo_size,
 550                             16, hw->dev_nperio_tx_fifo_size,
 551                             hw->dev_nperio_tx_fifo_size);
 552                 dwc2_check_param_tx_fifo_sizes(hsotg);
 553         }
 554 }
 555
 556 /*
 557  * Gets host hardware parameters. Forces host mode if not currently in
 558  * host mode. Should be called immediately after a core soft reset in
 559  * order to get the reset values.
 560  */
 561 static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
 562 {
 563         struct dwc2_hw_params *hw = &hsotg->hw_params;
 564         u32 gnptxfsiz;
 565         u32 hptxfsiz;
 566         bool forced;
 567
 568         if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
 569                 return;
 570
 571         forced = dwc2_force_mode_if_needed(hsotg, true);
 572
 573         gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
 574         hptxfsiz = dwc2_readl(hsotg->regs + HPTXFSIZ);
 575
 576         if (forced)
 577                 dwc2_clear_force_mode(hsotg);
 578
 579         hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 580                                        FIFOSIZE_DEPTH_SHIFT;
 581         hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 582                                       FIFOSIZE_DEPTH_SHIFT;
 583 }
 584
 585 /*
 586  * Gets device hardware parameters. Forces device mode if not
 587  * currently in device mode. Should be called immediately after a core
 588  * soft reset in order to get the reset values.
 589  */
 590 static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
 591 {
 592         struct dwc2_hw_params *hw = &hsotg->hw_params;
 593         bool forced;
 594         u32 gnptxfsiz;
 595
 596         if (hsotg->dr_mode == USB_DR_MODE_HOST)
 597                 return;
 598
 599         forced = dwc2_force_mode_if_needed(hsotg, false);
 600
 601         gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
 602
 603         if (forced)
 604                 dwc2_clear_force_mode(hsotg);
 605
 606         hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 607                                        FIFOSIZE_DEPTH_SHIFT;
 608 }
 609
 610 /**
 611  * During device initialization, read various hardware configuration
 612  * registers and interpret the contents.
 613  */
 614 int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
 615 {
 616         struct dwc2_hw_params *hw = &hsotg->hw_params;
 617         unsigned int width;
 618         u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
 619         u32 grxfsiz;
 620
 621         /*
 622          * Attempt to ensure this device is really a DWC_otg Controller.
 623          * Read and verify the GSNPSID register contents. The value should be
 624          * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
 625          * as in "OTG version 2.xx" or "OTG version 3.xx".
 626          */
 627         hw->snpsid = dwc2_readl(hsotg->regs + GSNPSID);
 628         if ((hw->snpsid & 0xfffff000) != 0x4f542000 &&
 629             (hw->snpsid & 0xfffff000) != 0x4f543000 &&
 630             (hw->snpsid & 0xffff0000) != 0x55310000 &&
 631             (hw->snpsid & 0xffff0000) != 0x55320000) {
 632                 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
 633                         hw->snpsid);
 634                 return -ENODEV;
 635         }
 636
 637         dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
 638                 hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
 639                 hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
 640
 641         hwcfg1 = dwc2_readl(hsotg->regs + GHWCFG1);
 642         hwcfg2 = dwc2_readl(hsotg->regs + GHWCFG2);
 643         hwcfg3 = dwc2_readl(hsotg->regs + GHWCFG3);
 644         hwcfg4 = dwc2_readl(hsotg->regs + GHWCFG4);
 645         grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
 646
 647         /*
 648          * Host specific hardware parameters. Reading these parameters
 649          * requires the controller to be in host mode. The mode will
 650          * be forced, if necessary, to read these values.
 651          */
 652         dwc2_get_host_hwparams(hsotg);
 653         dwc2_get_dev_hwparams(hsotg);
 654
 655         /* hwcfg1 */
 656         hw->dev_ep_dirs = hwcfg1;
 657
 658         /* hwcfg2 */
 659         hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
 660                       GHWCFG2_OP_MODE_SHIFT;
 661         hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
 662                    GHWCFG2_ARCHITECTURE_SHIFT;
 663         hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
 664         hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
 665                                 GHWCFG2_NUM_HOST_CHAN_SHIFT);
 666         hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
 667                           GHWCFG2_HS_PHY_TYPE_SHIFT;
 668         hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
 669                           GHWCFG2_FS_PHY_TYPE_SHIFT;
 670         hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
 671                          GHWCFG2_NUM_DEV_EP_SHIFT;
 672         hw->nperio_tx_q_depth =
 673                 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
 674                 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
 675         hw->host_perio_tx_q_depth =
 676                 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
 677                 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
 678         hw->dev_token_q_depth =
 679                 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
 680                 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
 681
 682         /* hwcfg3 */
 683         width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
 684                 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
 685         hw->max_transfer_size = (1 << (width + 11)) - 1;
 686         width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
 687                 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
 688         hw->max_packet_count = (1 << (width + 4)) - 1;
 689         hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
 690         hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
 691                               GHWCFG3_DFIFO_DEPTH_SHIFT;
 692
 693         /* hwcfg4 */
 694         hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
 695         hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
 696                                   GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
 697         hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
 698         hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
 699         hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
 700                                   GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
 701
 702         /* fifo sizes */
 703         hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
 704                                 GRXFSIZ_DEPTH_SHIFT;
 705
 706         return 0;
 707 }
 708
 709 int dwc2_init_params(struct dwc2_hsotg *hsotg)
 710 {
 711         const struct of_device_id *match;
 712         void (*set_params)(void *data);
 713
 714         dwc2_set_default_params(hsotg);
 715         dwc2_get_device_properties(hsotg);
 716
 717         match = of_match_device(dwc2_of_match_table, hsotg->dev);
 718         if (match && match->data) {
 719                 set_params = match->data;
 720                 set_params(hsotg);
 721         }
 722
 723         dwc2_check_params(hsotg);
 724
 725         return 0;
 726 }