drivers/thunderbolt/tb_regs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Thunderbolt driver - Port/Switch config area registers
   4  *
   5  * Every thunderbolt device consists (logically) of a switch with multiple
   6  * ports. Every port contains up to four config regions (HOPS, PORT, SWITCH,
   7  * COUNTERS) which are used to configure the device.
   8  *
   9  * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
  10  * Copyright (C) 2018, Intel Corporation
  11  */
  12
  13 #ifndef _TB_REGS
  14 #define _TB_REGS
  15
  16 #include <linux/types.h>
  17
  18
  19 #define TB_ROUTE_SHIFT 8  /* number of bits in a port entry of a route */
  20
  21
  22 /*
  23  * TODO: should be 63? But we do not know how to receive frames larger than 256
  24  * bytes at the frame level. (header + checksum = 16, 60*4 = 240)
  25  */
  26 #define TB_MAX_CONFIG_RW_LENGTH 60
  27
  28 enum tb_switch_cap {
  29         TB_SWITCH_CAP_TMU               = 0x03,
  30         TB_SWITCH_CAP_VSE               = 0x05,
  31 };
  32
  33 enum tb_switch_vse_cap {
  34         TB_VSE_CAP_PLUG_EVENTS          = 0x01, /* also EEPROM */
  35         TB_VSE_CAP_TIME2                = 0x03,
  36         TB_VSE_CAP_IECS                 = 0x04,
  37         TB_VSE_CAP_LINK_CONTROLLER      = 0x06, /* also IECS */
  38 };
  39
  40 enum tb_port_cap {
  41         TB_PORT_CAP_PHY                 = 0x01,
  42         TB_PORT_CAP_POWER               = 0x02,
  43         TB_PORT_CAP_TIME1               = 0x03,
  44         TB_PORT_CAP_ADAP                = 0x04,
  45         TB_PORT_CAP_VSE                 = 0x05,
  46         TB_PORT_CAP_USB4                = 0x06,
  47 };
  48
  49 enum tb_port_state {
  50         TB_PORT_DISABLED        = 0, /* tb_cap_phy.disable == 1 */
  51         TB_PORT_CONNECTING      = 1, /* retry */
  52         TB_PORT_UP              = 2,
  53         TB_PORT_UNPLUGGED       = 7,
  54 };
  55
  56 /* capability headers */
  57
  58 struct tb_cap_basic {
  59         u8 next;
  60         /* enum tb_cap cap:8; prevent "narrower than values of its type" */
  61         u8 cap; /* if cap == 0x05 then we have a extended capability */
  62 } __packed;
  63
  64 /**
  65  * struct tb_cap_extended_short - Switch extended short capability
  66  * @next: Pointer to the next capability. If @next and @length are zero
  67  *        then we have a long cap.
  68  * @cap: Base capability ID (see &enum tb_switch_cap)
  69  * @vsec_id: Vendor specific capability ID (see &enum switch_vse_cap)
  70  * @length: Length of this capability
  71  */
  72 struct tb_cap_extended_short {
  73         u8 next;
  74         u8 cap;
  75         u8 vsec_id;
  76         u8 length;
  77 } __packed;
  78
  79 /**
  80  * struct tb_cap_extended_long - Switch extended long capability
  81  * @zero1: This field should be zero
  82  * @cap: Base capability ID (see &enum tb_switch_cap)
  83  * @vsec_id: Vendor specific capability ID (see &enum switch_vse_cap)
  84  * @zero2: This field should be zero
  85  * @next: Pointer to the next capability
  86  * @length: Length of this capability
  87  */
  88 struct tb_cap_extended_long {
  89         u8 zero1;
  90         u8 cap;
  91         u8 vsec_id;
  92         u8 zero2;
  93         u16 next;
  94         u16 length;
  95 } __packed;
  96
  97 /**
  98  * struct tb_cap_any - Structure capable of hold every capability
  99  * @basic: Basic capability
 100  * @extended_short: Vendor specific capability
 101  * @extended_long: Vendor specific extended capability
 102  */
 103 struct tb_cap_any {
 104         union {
 105                 struct tb_cap_basic basic;
 106                 struct tb_cap_extended_short extended_short;
 107                 struct tb_cap_extended_long extended_long;
 108         };
 109 } __packed;
 110
 111 /* capabilities */
 112
 113 struct tb_cap_link_controller {
 114         struct tb_cap_extended_long cap_header;
 115         u32 count:4; /* number of link controllers */
 116         u32 unknown1:4;
 117         u32 base_offset:8; /*
 118                             * offset (into this capability) of the configuration
 119                             * area of the first link controller
 120                             */
 121         u32 length:12; /* link controller configuration area length */
 122         u32 unknown2:4; /* TODO check that length is correct */
 123 } __packed;
 124
 125 struct tb_cap_phy {
 126         struct tb_cap_basic cap_header;
 127         u32 unknown1:16;
 128         u32 unknown2:14;
 129         bool disable:1;
 130         u32 unknown3:11;
 131         enum tb_port_state state:4;
 132         u32 unknown4:2;
 133 } __packed;
 134
 135 struct tb_eeprom_ctl {
 136         bool clock:1; /* send pulse to transfer one bit */
 137         bool access_low:1; /* set to 0 before access */
 138         bool data_out:1; /* to eeprom */
 139         bool data_in:1; /* from eeprom */
 140         bool access_high:1; /* set to 1 before access */
 141         bool not_present:1; /* should be 0 */
 142         bool unknown1:1;
 143         bool present:1; /* should be 1 */
 144         u32 unknown2:24;
 145 } __packed;
 146
 147 struct tb_cap_plug_events {
 148         struct tb_cap_extended_short cap_header;
 149         u32 __unknown1:2;
 150         u32 plug_events:5;
 151         u32 __unknown2:25;
 152         u32 __unknown3;
 153         u32 __unknown4;
 154         struct tb_eeprom_ctl eeprom_ctl;
 155         u32 __unknown5[7];
 156         u32 drom_offset; /* 32 bit register, but eeprom addresses are 16 bit */
 157 } __packed;
 158
 159 /* device headers */
 160
 161 /* Present on port 0 in TB_CFG_SWITCH at address zero. */
 162 struct tb_regs_switch_header {
 163         /* DWORD 0 */
 164         u16 vendor_id;
 165         u16 device_id;
 166         /* DWORD 1 */
 167         u32 first_cap_offset:8;
 168         u32 upstream_port_number:6;
 169         u32 max_port_number:6;
 170         u32 depth:3;
 171         u32 __unknown1:1;
 172         u32 revision:8;
 173         /* DWORD 2 */
 174         u32 route_lo;
 175         /* DWORD 3 */
 176         u32 route_hi:31;
 177         bool enabled:1;
 178         /* DWORD 4 */
 179         u32 plug_events_delay:8; /*
 180                                   * RW, pause between plug events in
 181                                   * milliseconds. Writing 0x00 is interpreted
 182                                   * as 255ms.
 183                                   */
 184         u32 cmuv:8;
 185         u32 __unknown4:8;
 186         u32 thunderbolt_version:8;
 187 } __packed;
 188
 189 /* USB4 version 1.0 */
 190 #define USB4_VERSION_1_0                        0x20
 191
 192 #define ROUTER_CS_1                             0x01
 193 #define ROUTER_CS_4                             0x04
 194 #define ROUTER_CS_5                             0x05
 195 #define ROUTER_CS_5_SLP                         BIT(0)
 196 #define ROUTER_CS_5_WOP                         BIT(1)
 197 #define ROUTER_CS_5_WOU                         BIT(2)
 198 #define ROUTER_CS_5_C3S                         BIT(23)
 199 #define ROUTER_CS_5_PTO                         BIT(24)
 200 #define ROUTER_CS_5_UTO                         BIT(25)
 201 #define ROUTER_CS_5_HCO                         BIT(26)
 202 #define ROUTER_CS_5_CV                          BIT(31)
 203 #define ROUTER_CS_6                             0x06
 204 #define ROUTER_CS_6_SLPR                        BIT(0)
 205 #define ROUTER_CS_6_TNS                         BIT(1)
 206 #define ROUTER_CS_6_WOPS                        BIT(2)
 207 #define ROUTER_CS_6_WOUS                        BIT(3)
 208 #define ROUTER_CS_6_HCI                         BIT(18)
 209 #define ROUTER_CS_6_CR                          BIT(25)
 210 #define ROUTER_CS_7                             0x07
 211 #define ROUTER_CS_9                             0x09
 212 #define ROUTER_CS_25                            0x19
 213 #define ROUTER_CS_26                            0x1a
 214 #define ROUTER_CS_26_OPCODE_MASK                GENMASK(15, 0)
 215 #define ROUTER_CS_26_STATUS_MASK                GENMASK(29, 24)
 216 #define ROUTER_CS_26_STATUS_SHIFT               24
 217 #define ROUTER_CS_26_ONS                        BIT(30)
 218 #define ROUTER_CS_26_OV                         BIT(31)
 219
 220 /* USB4 router operations opcodes */
 221 enum usb4_switch_op {
 222         USB4_SWITCH_OP_QUERY_DP_RESOURCE = 0x10,
 223         USB4_SWITCH_OP_ALLOC_DP_RESOURCE = 0x11,
 224         USB4_SWITCH_OP_DEALLOC_DP_RESOURCE = 0x12,
 225         USB4_SWITCH_OP_NVM_WRITE = 0x20,
 226         USB4_SWITCH_OP_NVM_AUTH = 0x21,
 227         USB4_SWITCH_OP_NVM_READ = 0x22,
 228         USB4_SWITCH_OP_NVM_SET_OFFSET = 0x23,
 229         USB4_SWITCH_OP_DROM_READ = 0x24,
 230         USB4_SWITCH_OP_NVM_SECTOR_SIZE = 0x25,
 231 };
 232
 233 /* Router TMU configuration */
 234 #define TMU_RTR_CS_0                            0x00
 235 #define TMU_RTR_CS_0_TD                         BIT(27)
 236 #define TMU_RTR_CS_0_UCAP                       BIT(30)
 237 #define TMU_RTR_CS_1                            0x01
 238 #define TMU_RTR_CS_1_LOCAL_TIME_NS_MASK         GENMASK(31, 16)
 239 #define TMU_RTR_CS_1_LOCAL_TIME_NS_SHIFT        16
 240 #define TMU_RTR_CS_2                            0x02
 241 #define TMU_RTR_CS_3                            0x03
 242 #define TMU_RTR_CS_3_LOCAL_TIME_NS_MASK         GENMASK(15, 0)
 243 #define TMU_RTR_CS_3_TS_PACKET_INTERVAL_MASK    GENMASK(31, 16)
 244 #define TMU_RTR_CS_3_TS_PACKET_INTERVAL_SHIFT   16
 245 #define TMU_RTR_CS_22                           0x16
 246 #define TMU_RTR_CS_24                           0x18
 247
 248 enum tb_port_type {
 249         TB_TYPE_INACTIVE        = 0x000000,
 250         TB_TYPE_PORT            = 0x000001,
 251         TB_TYPE_NHI             = 0x000002,
 252         /* TB_TYPE_ETHERNET     = 0x020000, lower order bits are not known */
 253         /* TB_TYPE_SATA         = 0x080000, lower order bits are not known */
 254         TB_TYPE_DP_HDMI_IN      = 0x0e0101,
 255         TB_TYPE_DP_HDMI_OUT     = 0x0e0102,
 256         TB_TYPE_PCIE_DOWN       = 0x100101,
 257         TB_TYPE_PCIE_UP         = 0x100102,
 258         TB_TYPE_USB3_DOWN       = 0x200101,
 259         TB_TYPE_USB3_UP         = 0x200102,
 260 };
 261
 262 /* Present on every port in TB_CF_PORT at address zero. */
 263 struct tb_regs_port_header {
 264         /* DWORD 0 */
 265         u16 vendor_id;
 266         u16 device_id;
 267         /* DWORD 1 */
 268         u32 first_cap_offset:8;
 269         u32 max_counters:11;
 270         u32 counters_support:1;
 271         u32 __unknown1:4;
 272         u32 revision:8;
 273         /* DWORD 2 */
 274         enum tb_port_type type:24;
 275         u32 thunderbolt_version:8;
 276         /* DWORD 3 */
 277         u32 __unknown2:20;
 278         u32 port_number:6;
 279         u32 __unknown3:6;
 280         /* DWORD 4 */
 281         u32 nfc_credits;
 282         /* DWORD 5 */
 283         u32 max_in_hop_id:11;
 284         u32 max_out_hop_id:11;
 285         u32 __unknown4:10;
 286         /* DWORD 6 */
 287         u32 __unknown5;
 288         /* DWORD 7 */
 289         u32 __unknown6;
 290
 291 } __packed;
 292
 293 /* Basic adapter configuration registers */
 294 #define ADP_CS_4                                0x04
 295 #define ADP_CS_4_NFC_BUFFERS_MASK               GENMASK(9, 0)
 296 #define ADP_CS_4_TOTAL_BUFFERS_MASK             GENMASK(29, 20)
 297 #define ADP_CS_4_TOTAL_BUFFERS_SHIFT            20
 298 #define ADP_CS_4_LCK                            BIT(31)
 299 #define ADP_CS_5                                0x05
 300 #define ADP_CS_5_LCA_MASK                       GENMASK(28, 22)
 301 #define ADP_CS_5_LCA_SHIFT                      22
 302
 303 /* TMU adapter registers */
 304 #define TMU_ADP_CS_3                            0x03
 305 #define TMU_ADP_CS_3_UDM                        BIT(29)
 306
 307 /* Lane adapter registers */
 308 #define LANE_ADP_CS_0                           0x00
 309 #define LANE_ADP_CS_0_SUPPORTED_WIDTH_MASK      GENMASK(25, 20)
 310 #define LANE_ADP_CS_0_SUPPORTED_WIDTH_SHIFT     20
 311 #define LANE_ADP_CS_1                           0x01
 312 #define LANE_ADP_CS_1_TARGET_WIDTH_MASK         GENMASK(9, 4)
 313 #define LANE_ADP_CS_1_TARGET_WIDTH_SHIFT        4
 314 #define LANE_ADP_CS_1_TARGET_WIDTH_SINGLE       0x1
 315 #define LANE_ADP_CS_1_TARGET_WIDTH_DUAL         0x3
 316 #define LANE_ADP_CS_1_LD                        BIT(14)
 317 #define LANE_ADP_CS_1_LB                        BIT(15)
 318 #define LANE_ADP_CS_1_CURRENT_SPEED_MASK        GENMASK(19, 16)
 319 #define LANE_ADP_CS_1_CURRENT_SPEED_SHIFT       16
 320 #define LANE_ADP_CS_1_CURRENT_SPEED_GEN2        0x8
 321 #define LANE_ADP_CS_1_CURRENT_SPEED_GEN3        0x4
 322 #define LANE_ADP_CS_1_CURRENT_WIDTH_MASK        GENMASK(25, 20)
 323 #define LANE_ADP_CS_1_CURRENT_WIDTH_SHIFT       20
 324
 325 /* USB4 port registers */
 326 #define PORT_CS_1                               0x01
 327 #define PORT_CS_1_LENGTH_SHIFT                  8
 328 #define PORT_CS_1_TARGET_MASK                   GENMASK(18, 16)
 329 #define PORT_CS_1_TARGET_SHIFT                  16
 330 #define PORT_CS_1_RETIMER_INDEX_SHIFT           20
 331 #define PORT_CS_1_WNR_WRITE                     BIT(24)
 332 #define PORT_CS_1_NR                            BIT(25)
 333 #define PORT_CS_1_RC                            BIT(26)
 334 #define PORT_CS_1_PND                           BIT(31)
 335 #define PORT_CS_2                               0x02
 336 #define PORT_CS_18                              0x12
 337 #define PORT_CS_18_BE                           BIT(8)
 338 #define PORT_CS_18_TCM                          BIT(9)
 339 #define PORT_CS_18_WOU4S                        BIT(18)
 340 #define PORT_CS_19                              0x13
 341 #define PORT_CS_19_PC                           BIT(3)
 342 #define PORT_CS_19_PID                          BIT(4)
 343 #define PORT_CS_19_WOC                          BIT(16)
 344 #define PORT_CS_19_WOD                          BIT(17)
 345 #define PORT_CS_19_WOU4                         BIT(18)
 346
 347 /* Display Port adapter registers */
 348 #define ADP_DP_CS_0                             0x00
 349 #define ADP_DP_CS_0_VIDEO_HOPID_MASK            GENMASK(26, 16)
 350 #define ADP_DP_CS_0_VIDEO_HOPID_SHIFT           16
 351 #define ADP_DP_CS_0_AE                          BIT(30)
 352 #define ADP_DP_CS_0_VE                          BIT(31)
 353 #define ADP_DP_CS_1_AUX_TX_HOPID_MASK           GENMASK(10, 0)
 354 #define ADP_DP_CS_1_AUX_RX_HOPID_MASK           GENMASK(21, 11)
 355 #define ADP_DP_CS_1_AUX_RX_HOPID_SHIFT          11
 356 #define ADP_DP_CS_2                             0x02
 357 #define ADP_DP_CS_2_HDP                         BIT(6)
 358 #define ADP_DP_CS_3                             0x03
 359 #define ADP_DP_CS_3_HDPC                        BIT(9)
 360 #define DP_LOCAL_CAP                            0x04
 361 #define DP_REMOTE_CAP                           0x05
 362 #define DP_STATUS_CTRL                          0x06
 363 #define DP_STATUS_CTRL_CMHS                     BIT(25)
 364 #define DP_STATUS_CTRL_UF                       BIT(26)
 365 #define DP_COMMON_CAP                           0x07
 366 /*
 367  * DP_COMMON_CAP offsets work also for DP_LOCAL_CAP and DP_REMOTE_CAP
 368  * with exception of DPRX done.
 369  */
 370 #define DP_COMMON_CAP_RATE_MASK                 GENMASK(11, 8)
 371 #define DP_COMMON_CAP_RATE_SHIFT                8
 372 #define DP_COMMON_CAP_RATE_RBR                  0x0
 373 #define DP_COMMON_CAP_RATE_HBR                  0x1
 374 #define DP_COMMON_CAP_RATE_HBR2                 0x2
 375 #define DP_COMMON_CAP_RATE_HBR3                 0x3
 376 #define DP_COMMON_CAP_LANES_MASK                GENMASK(14, 12)
 377 #define DP_COMMON_CAP_LANES_SHIFT               12
 378 #define DP_COMMON_CAP_1_LANE                    0x0
 379 #define DP_COMMON_CAP_2_LANES                   0x1
 380 #define DP_COMMON_CAP_4_LANES                   0x2
 381 #define DP_COMMON_CAP_DPRX_DONE                 BIT(31)
 382
 383 /* PCIe adapter registers */
 384 #define ADP_PCIE_CS_0                           0x00
 385 #define ADP_PCIE_CS_0_PE                        BIT(31)
 386
 387 /* USB adapter registers */
 388 #define ADP_USB3_CS_0                           0x00
 389 #define ADP_USB3_CS_0_V                         BIT(30)
 390 #define ADP_USB3_CS_0_PE                        BIT(31)
 391 #define ADP_USB3_CS_1                           0x01
 392 #define ADP_USB3_CS_1_CUBW_MASK                 GENMASK(11, 0)
 393 #define ADP_USB3_CS_1_CDBW_MASK                 GENMASK(23, 12)
 394 #define ADP_USB3_CS_1_CDBW_SHIFT                12
 395 #define ADP_USB3_CS_1_HCA                       BIT(31)
 396 #define ADP_USB3_CS_2                           0x02
 397 #define ADP_USB3_CS_2_AUBW_MASK                 GENMASK(11, 0)
 398 #define ADP_USB3_CS_2_ADBW_MASK                 GENMASK(23, 12)
 399 #define ADP_USB3_CS_2_ADBW_SHIFT                12
 400 #define ADP_USB3_CS_2_CMR                       BIT(31)
 401 #define ADP_USB3_CS_3                           0x03
 402 #define ADP_USB3_CS_3_SCALE_MASK                GENMASK(5, 0)
 403 #define ADP_USB3_CS_4                           0x04
 404 #define ADP_USB3_CS_4_ALR_MASK                  GENMASK(6, 0)
 405 #define ADP_USB3_CS_4_ALR_20G                   0x1
 406 #define ADP_USB3_CS_4_ULV                       BIT(7)
 407 #define ADP_USB3_CS_4_MSLR_MASK                 GENMASK(18, 12)
 408 #define ADP_USB3_CS_4_MSLR_SHIFT                12
 409 #define ADP_USB3_CS_4_MSLR_20G                  0x1
 410
 411 /* Hop register from TB_CFG_HOPS. 8 byte per entry. */
 412 struct tb_regs_hop {
 413         /* DWORD 0 */
 414         u32 next_hop:11; /*
 415                           * hop to take after sending the packet through
 416                           * out_port (on the incoming port of the next switch)
 417                           */
 418         u32 out_port:6; /* next port of the path (on the same switch) */
 419         u32 initial_credits:8;
 420         u32 unknown1:6; /* set to zero */
 421         bool enable:1;
 422
 423         /* DWORD 1 */
 424         u32 weight:4;
 425         u32 unknown2:4; /* set to zero */
 426         u32 priority:3;
 427         bool drop_packages:1;
 428         u32 counter:11; /* index into TB_CFG_COUNTERS on this port */
 429         bool counter_enable:1;
 430         bool ingress_fc:1;
 431         bool egress_fc:1;
 432         bool ingress_shared_buffer:1;
 433         bool egress_shared_buffer:1;
 434         bool pending:1;
 435         u32 unknown3:3; /* set to zero */
 436 } __packed;
 437
 438 /* Common link controller registers */
 439 #define TB_LC_DESC                      0x02
 440 #define TB_LC_DESC_NLC_MASK             GENMASK(3, 0)
 441 #define TB_LC_DESC_SIZE_SHIFT           8
 442 #define TB_LC_DESC_SIZE_MASK            GENMASK(15, 8)
 443 #define TB_LC_DESC_PORT_SIZE_SHIFT      16
 444 #define TB_LC_DESC_PORT_SIZE_MASK       GENMASK(27, 16)
 445 #define TB_LC_FUSE                      0x03
 446 #define TB_LC_SNK_ALLOCATION            0x10
 447 #define TB_LC_SNK_ALLOCATION_SNK0_MASK  GENMASK(3, 0)
 448 #define TB_LC_SNK_ALLOCATION_SNK0_CM    0x1
 449 #define TB_LC_SNK_ALLOCATION_SNK1_SHIFT 4
 450 #define TB_LC_SNK_ALLOCATION_SNK1_MASK  GENMASK(7, 4)
 451 #define TB_LC_SNK_ALLOCATION_SNK1_CM    0x1
 452 #define TB_LC_POWER                     0x740
 453
 454 /* Link controller registers */
 455 #define TB_LC_PORT_ATTR                 0x8d
 456 #define TB_LC_PORT_ATTR_BE              BIT(12)
 457
 458 #define TB_LC_SX_CTRL                   0x96
 459 #define TB_LC_SX_CTRL_WOC               BIT(1)
 460 #define TB_LC_SX_CTRL_WOD               BIT(2)
 461 #define TB_LC_SX_CTRL_WOU4              BIT(5)
 462 #define TB_LC_SX_CTRL_WOP               BIT(6)
 463 #define TB_LC_SX_CTRL_L1C               BIT(16)
 464 #define TB_LC_SX_CTRL_L1D               BIT(17)
 465 #define TB_LC_SX_CTRL_L2C               BIT(20)
 466 #define TB_LC_SX_CTRL_L2D               BIT(21)
 467 #define TB_LC_SX_CTRL_UPSTREAM          BIT(30)
 468 #define TB_LC_SX_CTRL_SLP               BIT(31)
 469
 470 #endif