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
   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
  13 static 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
  23 static 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
  46 static 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
  58 static 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
  71 static 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
  87 static 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
  96 static 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
 104 static 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
 122 static 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
 137 static 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
 154 static 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
 164 static 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
 171 static 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
 187 static 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
 196 static 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
 218 static 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
 237 const 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 };
 276 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
 277
 278 const struct acpi_device_id dwc2_acpi_match[] = {
 279         { "BCM2848", (kernel_ulong_t)dwc2_set_bcm_params },
 280         { },
 281 };
 282 MODULE_DEVICE_TABLE(acpi, dwc2_acpi_match);
 283
 284 static 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
 304 static 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
 324 static 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
 340 static 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
 359 static 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
 374 static 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
 388 static 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  */
 412 static 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  */
 484 static 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         p->oc_disable = of_property_read_bool(hsotg->dev->of_node, "disable-over-current");
 512 }
 513
 514 static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
 515 {
 516         int valid = 1;
 517
 518         if (hsotg->params.otg_caps.hnp_support && hsotg->params.otg_caps.srp_support) {
 519                 /* check HNP && SRP capable */
 520                 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
 521                         valid = 0;
 522         } else if (!hsotg->params.otg_caps.hnp_support) {
 523                 /* check SRP only capable */
 524                 if (hsotg->params.otg_caps.srp_support) {
 525                         switch (hsotg->hw_params.op_mode) {
 526                         case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
 527                         case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
 528                         case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
 529                         case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
 530                                 break;
 531                         default:
 532                                 valid = 0;
 533                                 break;
 534                         }
 535                 }
 536                 /* else: NO HNP && NO SRP capable: always valid */
 537         } else {
 538                 valid = 0;
 539         }
 540
 541         if (!valid)
 542                 dwc2_set_param_otg_cap(hsotg);
 543 }
 544
 545 static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
 546 {
 547         int valid = 0;
 548         u32 hs_phy_type;
 549         u32 fs_phy_type;
 550
 551         hs_phy_type = hsotg->hw_params.hs_phy_type;
 552         fs_phy_type = hsotg->hw_params.fs_phy_type;
 553
 554         switch (hsotg->params.phy_type) {
 555         case DWC2_PHY_TYPE_PARAM_FS:
 556                 if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
 557                         valid = 1;
 558                 break;
 559         case DWC2_PHY_TYPE_PARAM_UTMI:
 560                 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
 561                     (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
 562                         valid = 1;
 563                 break;
 564         case DWC2_PHY_TYPE_PARAM_ULPI:
 565                 if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
 566                     (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
 567                         valid = 1;
 568                 break;
 569         default:
 570                 break;
 571         }
 572
 573         if (!valid)
 574                 dwc2_set_param_phy_type(hsotg);
 575 }
 576
 577 static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
 578 {
 579         int valid = 1;
 580         int phy_type = hsotg->params.phy_type;
 581         int speed = hsotg->params.speed;
 582
 583         switch (speed) {
 584         case DWC2_SPEED_PARAM_HIGH:
 585                 if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
 586                     (phy_type == DWC2_PHY_TYPE_PARAM_FS))
 587                         valid = 0;
 588                 break;
 589         case DWC2_SPEED_PARAM_FULL:
 590         case DWC2_SPEED_PARAM_LOW:
 591                 break;
 592         default:
 593                 valid = 0;
 594                 break;
 595         }
 596
 597         if (!valid)
 598                 dwc2_set_param_speed(hsotg);
 599 }
 600
 601 static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 602 {
 603         int valid = 0;
 604         int param = hsotg->params.phy_utmi_width;
 605         int width = hsotg->hw_params.utmi_phy_data_width;
 606
 607         switch (width) {
 608         case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
 609                 valid = (param == 8);
 610                 break;
 611         case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
 612                 valid = (param == 16);
 613                 break;
 614         case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
 615                 valid = (param == 8 || param == 16);
 616                 break;
 617         }
 618
 619         if (!valid)
 620                 dwc2_set_param_phy_utmi_width(hsotg);
 621 }
 622
 623 static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
 624 {
 625         int param = hsotg->params.power_down;
 626
 627         switch (param) {
 628         case DWC2_POWER_DOWN_PARAM_NONE:
 629                 break;
 630         case DWC2_POWER_DOWN_PARAM_PARTIAL:
 631                 if (hsotg->hw_params.power_optimized)
 632                         break;
 633                 dev_dbg(hsotg->dev,
 634                         "Partial power down isn't supported by HW\n");
 635                 param = DWC2_POWER_DOWN_PARAM_NONE;
 636                 break;
 637         case DWC2_POWER_DOWN_PARAM_HIBERNATION:
 638                 if (hsotg->hw_params.hibernation)
 639                         break;
 640                 dev_dbg(hsotg->dev,
 641                         "Hibernation isn't supported by HW\n");
 642                 param = DWC2_POWER_DOWN_PARAM_NONE;
 643                 break;
 644         default:
 645                 dev_err(hsotg->dev,
 646                         "%s: Invalid parameter power_down=%d\n",
 647                         __func__, param);
 648                 param = DWC2_POWER_DOWN_PARAM_NONE;
 649                 break;
 650         }
 651
 652         hsotg->params.power_down = param;
 653 }
 654
 655 static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 656 {
 657         int fifo_count;
 658         int fifo;
 659         int min;
 660         u32 total = 0;
 661         u32 dptxfszn;
 662
 663         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 664         min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
 665
 666         for (fifo = 1; fifo <= fifo_count; fifo++)
 667                 total += hsotg->params.g_tx_fifo_size[fifo];
 668
 669         if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
 670                 dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
 671                          __func__);
 672                 dwc2_set_param_tx_fifo_sizes(hsotg);
 673         }
 674
 675         for (fifo = 1; fifo <= fifo_count; fifo++) {
 676                 dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
 677
 678                 if (hsotg->params.g_tx_fifo_size[fifo] < min ||
 679                     hsotg->params.g_tx_fifo_size[fifo] >  dptxfszn) {
 680                         dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
 681                                  __func__, fifo,
 682                                  hsotg->params.g_tx_fifo_size[fifo]);
 683                         hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
 684                 }
 685         }
 686 }
 687
 688 #define CHECK_RANGE(_param, _min, _max, _def) do {                      \
 689                 if ((int)(hsotg->params._param) < (_min) ||             \
 690                     (hsotg->params._param) > (_max)) {                  \
 691                         dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
 692                                  __func__, #_param, hsotg->params._param); \
 693                         hsotg->params._param = (_def);                  \
 694                 }                                                       \
 695         } while (0)
 696
 697 #define CHECK_BOOL(_param, _check) do {                                 \
 698                 if (hsotg->params._param && !(_check)) {                \
 699                         dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
 700                                  __func__, #_param, hsotg->params._param); \
 701                         hsotg->params._param = false;                   \
 702                 }                                                       \
 703         } while (0)
 704
 705 static void dwc2_check_params(struct dwc2_hsotg *hsotg)
 706 {
 707         struct dwc2_hw_params *hw = &hsotg->hw_params;
 708         struct dwc2_core_params *p = &hsotg->params;
 709         bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 710
 711         dwc2_check_param_otg_cap(hsotg);
 712         dwc2_check_param_phy_type(hsotg);
 713         dwc2_check_param_speed(hsotg);
 714         dwc2_check_param_phy_utmi_width(hsotg);
 715         dwc2_check_param_power_down(hsotg);
 716         CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
 717         CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
 718         CHECK_BOOL(i2c_enable, hw->i2c_enable);
 719         CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
 720         CHECK_BOOL(acg_enable, hw->acg_enable);
 721         CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
 722         CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
 723         CHECK_BOOL(lpm, hw->lpm_mode);
 724         CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
 725         CHECK_BOOL(besl, hsotg->params.lpm);
 726         CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
 727         CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
 728         CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
 729         CHECK_BOOL(service_interval, hw->service_interval_mode);
 730         CHECK_RANGE(max_packet_count,
 731                     15, hw->max_packet_count,
 732                     hw->max_packet_count);
 733         CHECK_RANGE(max_transfer_size,
 734                     2047, hw->max_transfer_size,
 735                     hw->max_transfer_size);
 736
 737         if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
 738             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 739                 CHECK_BOOL(host_dma, dma_capable);
 740                 CHECK_BOOL(dma_desc_enable, p->host_dma);
 741                 CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
 742                 CHECK_BOOL(host_ls_low_power_phy_clk,
 743                            p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
 744                 CHECK_RANGE(host_channels,
 745                             1, hw->host_channels,
 746                             hw->host_channels);
 747                 CHECK_RANGE(host_rx_fifo_size,
 748                             16, hw->rx_fifo_size,
 749                             hw->rx_fifo_size);
 750                 CHECK_RANGE(host_nperio_tx_fifo_size,
 751                             16, hw->host_nperio_tx_fifo_size,
 752                             hw->host_nperio_tx_fifo_size);
 753                 CHECK_RANGE(host_perio_tx_fifo_size,
 754                             16, hw->host_perio_tx_fifo_size,
 755                             hw->host_perio_tx_fifo_size);
 756         }
 757
 758         if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 759             (hsotg->dr_mode == USB_DR_MODE_OTG)) {
 760                 CHECK_BOOL(g_dma, dma_capable);
 761                 CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
 762                 CHECK_RANGE(g_rx_fifo_size,
 763                             16, hw->rx_fifo_size,
 764                             hw->rx_fifo_size);
 765                 CHECK_RANGE(g_np_tx_fifo_size,
 766                             16, hw->dev_nperio_tx_fifo_size,
 767                             hw->dev_nperio_tx_fifo_size);
 768                 dwc2_check_param_tx_fifo_sizes(hsotg);
 769         }
 770 }
 771
 772 /*
 773  * Gets host hardware parameters. Forces host mode if not currently in
 774  * host mode. Should be called immediately after a core soft reset in
 775  * order to get the reset values.
 776  */
 777 static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
 778 {
 779         struct dwc2_hw_params *hw = &hsotg->hw_params;
 780         u32 gnptxfsiz;
 781         u32 hptxfsiz;
 782
 783         if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
 784                 return;
 785
 786         dwc2_force_mode(hsotg, true);
 787
 788         gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
 789         hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
 790
 791         hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 792                                        FIFOSIZE_DEPTH_SHIFT;
 793         hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 794                                       FIFOSIZE_DEPTH_SHIFT;
 795 }
 796
 797 /*
 798  * Gets device hardware parameters. Forces device mode if not
 799  * currently in device mode. Should be called immediately after a core
 800  * soft reset in order to get the reset values.
 801  */
 802 static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
 803 {
 804         struct dwc2_hw_params *hw = &hsotg->hw_params;
 805         u32 gnptxfsiz;
 806         int fifo, fifo_count;
 807
 808         if (hsotg->dr_mode == USB_DR_MODE_HOST)
 809                 return;
 810
 811         dwc2_force_mode(hsotg, false);
 812
 813         gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
 814
 815         fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 816
 817         for (fifo = 1; fifo <= fifo_count; fifo++) {
 818                 hw->g_tx_fifo_size[fifo] =
 819                         (dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
 820                          FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
 821         }
 822
 823         hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
 824                                        FIFOSIZE_DEPTH_SHIFT;
 825 }
 826
 827 /**
 828  * dwc2_get_hwparams() - During device initialization, read various hardware
 829  *                       configuration registers and interpret the contents.
 830  *
 831  * @hsotg: Programming view of the DWC_otg controller
 832  *
 833  */
 834 int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
 835 {
 836         struct dwc2_hw_params *hw = &hsotg->hw_params;
 837         unsigned int width;
 838         u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
 839         u32 grxfsiz;
 840
 841         hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
 842         hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
 843         hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
 844         hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
 845         grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
 846
 847         /* hwcfg1 */
 848         hw->dev_ep_dirs = hwcfg1;
 849
 850         /* hwcfg2 */
 851         hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
 852                       GHWCFG2_OP_MODE_SHIFT;
 853         hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
 854                    GHWCFG2_ARCHITECTURE_SHIFT;
 855         hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
 856         hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
 857                                 GHWCFG2_NUM_HOST_CHAN_SHIFT);
 858         hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
 859                           GHWCFG2_HS_PHY_TYPE_SHIFT;
 860         hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
 861                           GHWCFG2_FS_PHY_TYPE_SHIFT;
 862         hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
 863                          GHWCFG2_NUM_DEV_EP_SHIFT;
 864         hw->nperio_tx_q_depth =
 865                 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
 866                 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
 867         hw->host_perio_tx_q_depth =
 868                 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
 869                 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
 870         hw->dev_token_q_depth =
 871                 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
 872                 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
 873
 874         /* hwcfg3 */
 875         width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
 876                 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
 877         hw->max_transfer_size = (1 << (width + 11)) - 1;
 878         width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
 879                 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
 880         hw->max_packet_count = (1 << (width + 4)) - 1;
 881         hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
 882         hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
 883                               GHWCFG3_DFIFO_DEPTH_SHIFT;
 884         hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
 885
 886         /* hwcfg4 */
 887         hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
 888         hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
 889                                   GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
 890         hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
 891                              GHWCFG4_NUM_IN_EPS_SHIFT;
 892         hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
 893         hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
 894         hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
 895         hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
 896                                   GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
 897         hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
 898         hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
 899         hw->service_interval_mode = !!(hwcfg4 &
 900                                        GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
 901
 902         /* fifo sizes */
 903         hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
 904                                 GRXFSIZ_DEPTH_SHIFT;
 905         /*
 906          * Host specific hardware parameters. Reading these parameters
 907          * requires the controller to be in host mode. The mode will
 908          * be forced, if necessary, to read these values.
 909          */
 910         dwc2_get_host_hwparams(hsotg);
 911         dwc2_get_dev_hwparams(hsotg);
 912
 913         return 0;
 914 }
 915
 916 typedef void (*set_params_cb)(struct dwc2_hsotg *data);
 917
 918 int dwc2_init_params(struct dwc2_hsotg *hsotg)
 919 {
 920         const struct of_device_id *match;
 921         set_params_cb set_params;
 922
 923         dwc2_set_default_params(hsotg);
 924         dwc2_get_device_properties(hsotg);
 925
 926         match = of_match_device(dwc2_of_match_table, hsotg->dev);
 927         if (match && match->data) {
 928                 set_params = match->data;
 929                 set_params(hsotg);
 930         } else {
 931                 const struct acpi_device_id *amatch;
 932
 933                 amatch = acpi_match_device(dwc2_acpi_match, hsotg->dev);
 934                 if (amatch && amatch->driver_data) {
 935                         set_params = (set_params_cb)amatch->driver_data;
 936                         set_params(hsotg);
 937                 }
 938         }
 939
 940         dwc2_check_params(hsotg);
 941
 942         return 0;
 943 }