1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Marvell 88E6xxx Switch Global (1) Registers support 4 * 5 * Copyright (c) 2008 Marvell Semiconductor 6 * 7 * Copyright (c) 2016-2017 Savoir-faire Linux Inc. 8 * Vivien Didelot <vivien.didelot@savoirfairelinux.com> 9 */ 10 11 #include <linux/bitfield.h> 12 13 #include "chip.h" 14 #include "global1.h" 15 16 int mv88e6xxx_g1_read(struct mv88e6xxx_chip *chip, int reg, u16 *val) 17 { 18 int addr = chip->info->global1_addr; 19 20 return mv88e6xxx_read(chip, addr, reg, val); 21 } 22 23 int mv88e6xxx_g1_write(struct mv88e6xxx_chip *chip, int reg, u16 val) 24 { 25 int addr = chip->info->global1_addr; 26 27 return mv88e6xxx_write(chip, addr, reg, val); 28 } 29 30 int mv88e6xxx_g1_wait_bit(struct mv88e6xxx_chip *chip, int reg, int 31 bit, int val) 32 { 33 return mv88e6xxx_wait_bit(chip, chip->info->global1_addr, reg, 34 bit, val); 35 } 36 37 int mv88e6xxx_g1_wait_mask(struct mv88e6xxx_chip *chip, int reg, 38 u16 mask, u16 val) 39 { 40 return mv88e6xxx_wait_mask(chip, chip->info->global1_addr, reg, 41 mask, val); 42 } 43 44 /* Offset 0x00: Switch Global Status Register */ 45 46 static int mv88e6185_g1_wait_ppu_disabled(struct mv88e6xxx_chip *chip) 47 { 48 return mv88e6xxx_g1_wait_mask(chip, MV88E6XXX_G1_STS, 49 MV88E6185_G1_STS_PPU_STATE_MASK, 50 MV88E6185_G1_STS_PPU_STATE_DISABLED); 51 } 52 53 static int mv88e6185_g1_wait_ppu_polling(struct mv88e6xxx_chip *chip) 54 { 55 return mv88e6xxx_g1_wait_mask(chip, MV88E6XXX_G1_STS, 56 MV88E6185_G1_STS_PPU_STATE_MASK, 57 MV88E6185_G1_STS_PPU_STATE_POLLING); 58 } 59 60 static int mv88e6352_g1_wait_ppu_polling(struct mv88e6xxx_chip *chip) 61 { 62 int bit = __bf_shf(MV88E6352_G1_STS_PPU_STATE); 63 64 return mv88e6xxx_g1_wait_bit(chip, MV88E6XXX_G1_STS, bit, 1); 65 } 66 67 static int mv88e6xxx_g1_wait_init_ready(struct mv88e6xxx_chip *chip) 68 { 69 int bit = __bf_shf(MV88E6XXX_G1_STS_INIT_READY); 70 71 /* Wait up to 1 second for the switch to be ready. The InitReady bit 11 72 * is set to a one when all units inside the device (ATU, VTU, etc.) 73 * have finished their initialization and are ready to accept frames. 74 */ 75 return mv88e6xxx_g1_wait_bit(chip, MV88E6XXX_G1_STS, bit, 1); 76 } 77 78 /* Offset 0x01: Switch MAC Address Register Bytes 0 & 1 79 * Offset 0x02: Switch MAC Address Register Bytes 2 & 3 80 * Offset 0x03: Switch MAC Address Register Bytes 4 & 5 81 */ 82 int mv88e6xxx_g1_set_switch_mac(struct mv88e6xxx_chip *chip, u8 *addr) 83 { 84 u16 reg; 85 int err; 86 87 reg = (addr[0] << 8) | addr[1]; 88 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_MAC_01, reg); 89 if (err) 90 return err; 91 92 reg = (addr[2] << 8) | addr[3]; 93 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_MAC_23, reg); 94 if (err) 95 return err; 96 97 reg = (addr[4] << 8) | addr[5]; 98 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_MAC_45, reg); 99 if (err) 100 return err; 101 102 return 0; 103 } 104 105 /* Offset 0x04: Switch Global Control Register */ 106 107 int mv88e6185_g1_reset(struct mv88e6xxx_chip *chip) 108 { 109 u16 val; 110 int err; 111 112 /* Set the SWReset bit 15 along with the PPUEn bit 14, to also restart 113 * the PPU, including re-doing PHY detection and initialization 114 */ 115 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL1, &val); 116 if (err) 117 return err; 118 119 val |= MV88E6XXX_G1_CTL1_SW_RESET; 120 val |= MV88E6XXX_G1_CTL1_PPU_ENABLE; 121 122 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val); 123 if (err) 124 return err; 125 126 err = mv88e6xxx_g1_wait_init_ready(chip); 127 if (err) 128 return err; 129 130 return mv88e6185_g1_wait_ppu_polling(chip); 131 } 132 133 int mv88e6250_g1_reset(struct mv88e6xxx_chip *chip) 134 { 135 u16 val; 136 int err; 137 138 /* Set the SWReset bit 15 */ 139 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL1, &val); 140 if (err) 141 return err; 142 143 val |= MV88E6XXX_G1_CTL1_SW_RESET; 144 145 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val); 146 if (err) 147 return err; 148 149 return mv88e6xxx_g1_wait_init_ready(chip); 150 } 151 152 int mv88e6352_g1_reset(struct mv88e6xxx_chip *chip) 153 { 154 int err; 155 156 err = mv88e6250_g1_reset(chip); 157 if (err) 158 return err; 159 160 return mv88e6352_g1_wait_ppu_polling(chip); 161 } 162 163 int mv88e6185_g1_ppu_enable(struct mv88e6xxx_chip *chip) 164 { 165 u16 val; 166 int err; 167 168 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL1, &val); 169 if (err) 170 return err; 171 172 val |= MV88E6XXX_G1_CTL1_PPU_ENABLE; 173 174 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val); 175 if (err) 176 return err; 177 178 return mv88e6185_g1_wait_ppu_polling(chip); 179 } 180 181 int mv88e6185_g1_ppu_disable(struct mv88e6xxx_chip *chip) 182 { 183 u16 val; 184 int err; 185 186 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL1, &val); 187 if (err) 188 return err; 189 190 val &= ~MV88E6XXX_G1_CTL1_PPU_ENABLE; 191 192 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val); 193 if (err) 194 return err; 195 196 return mv88e6185_g1_wait_ppu_disabled(chip); 197 } 198 199 /* Offset 0x10: IP-PRI Mapping Register 0 200 * Offset 0x11: IP-PRI Mapping Register 1 201 * Offset 0x12: IP-PRI Mapping Register 2 202 * Offset 0x13: IP-PRI Mapping Register 3 203 * Offset 0x14: IP-PRI Mapping Register 4 204 * Offset 0x15: IP-PRI Mapping Register 5 205 * Offset 0x16: IP-PRI Mapping Register 6 206 * Offset 0x17: IP-PRI Mapping Register 7 207 */ 208 209 int mv88e6085_g1_ip_pri_map(struct mv88e6xxx_chip *chip) 210 { 211 int err; 212 213 /* Reset the IP TOS/DiffServ/Traffic priorities to defaults */ 214 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_0, 0x0000); 215 if (err) 216 return err; 217 218 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_1, 0x0000); 219 if (err) 220 return err; 221 222 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_2, 0x5555); 223 if (err) 224 return err; 225 226 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_3, 0x5555); 227 if (err) 228 return err; 229 230 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_4, 0xaaaa); 231 if (err) 232 return err; 233 234 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_5, 0xaaaa); 235 if (err) 236 return err; 237 238 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_6, 0xffff); 239 if (err) 240 return err; 241 242 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_7, 0xffff); 243 if (err) 244 return err; 245 246 return 0; 247 } 248 249 /* Offset 0x18: IEEE-PRI Register */ 250 251 int mv88e6085_g1_ieee_pri_map(struct mv88e6xxx_chip *chip) 252 { 253 /* Reset the IEEE Tag priorities to defaults */ 254 return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IEEE_PRI, 0xfa41); 255 } 256 257 int mv88e6250_g1_ieee_pri_map(struct mv88e6xxx_chip *chip) 258 { 259 /* Reset the IEEE Tag priorities to defaults */ 260 return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IEEE_PRI, 0xfa50); 261 } 262 263 /* Offset 0x1a: Monitor Control */ 264 /* Offset 0x1a: Monitor & MGMT Control on some devices */ 265 266 int mv88e6095_g1_set_egress_port(struct mv88e6xxx_chip *chip, 267 enum mv88e6xxx_egress_direction direction, 268 int port) 269 { 270 int *dest_port_chip; 271 u16 reg; 272 int err; 273 274 err = mv88e6xxx_g1_read(chip, MV88E6185_G1_MONITOR_CTL, ®); 275 if (err) 276 return err; 277 278 switch (direction) { 279 case MV88E6XXX_EGRESS_DIR_INGRESS: 280 dest_port_chip = &chip->ingress_dest_port; 281 reg &= MV88E6185_G1_MONITOR_CTL_INGRESS_DEST_MASK; 282 reg |= port << 283 __bf_shf(MV88E6185_G1_MONITOR_CTL_INGRESS_DEST_MASK); 284 break; 285 case MV88E6XXX_EGRESS_DIR_EGRESS: 286 dest_port_chip = &chip->egress_dest_port; 287 reg &= MV88E6185_G1_MONITOR_CTL_EGRESS_DEST_MASK; 288 reg |= port << 289 __bf_shf(MV88E6185_G1_MONITOR_CTL_EGRESS_DEST_MASK); 290 break; 291 default: 292 return -EINVAL; 293 } 294 295 err = mv88e6xxx_g1_write(chip, MV88E6185_G1_MONITOR_CTL, reg); 296 if (!err) 297 *dest_port_chip = port; 298 299 return err; 300 } 301 302 /* Older generations also call this the ARP destination. It has been 303 * generalized in more modern devices such that more than ARP can 304 * egress it 305 */ 306 int mv88e6095_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port) 307 { 308 u16 reg; 309 int err; 310 311 err = mv88e6xxx_g1_read(chip, MV88E6185_G1_MONITOR_CTL, ®); 312 if (err) 313 return err; 314 315 reg &= ~MV88E6185_G1_MONITOR_CTL_ARP_DEST_MASK; 316 reg |= port << __bf_shf(MV88E6185_G1_MONITOR_CTL_ARP_DEST_MASK); 317 318 return mv88e6xxx_g1_write(chip, MV88E6185_G1_MONITOR_CTL, reg); 319 } 320 321 static int mv88e6390_g1_monitor_write(struct mv88e6xxx_chip *chip, 322 u16 pointer, u8 data) 323 { 324 u16 reg; 325 326 reg = MV88E6390_G1_MONITOR_MGMT_CTL_UPDATE | pointer | data; 327 328 return mv88e6xxx_g1_write(chip, MV88E6390_G1_MONITOR_MGMT_CTL, reg); 329 } 330 331 int mv88e6390_g1_set_egress_port(struct mv88e6xxx_chip *chip, 332 enum mv88e6xxx_egress_direction direction, 333 int port) 334 { 335 int *dest_port_chip; 336 u16 ptr; 337 int err; 338 339 switch (direction) { 340 case MV88E6XXX_EGRESS_DIR_INGRESS: 341 dest_port_chip = &chip->ingress_dest_port; 342 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_INGRESS_DEST; 343 break; 344 case MV88E6XXX_EGRESS_DIR_EGRESS: 345 dest_port_chip = &chip->egress_dest_port; 346 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_EGRESS_DEST; 347 break; 348 default: 349 return -EINVAL; 350 } 351 352 err = mv88e6390_g1_monitor_write(chip, ptr, port); 353 if (!err) 354 *dest_port_chip = port; 355 356 return err; 357 } 358 359 int mv88e6390_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port) 360 { 361 u16 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST; 362 363 return mv88e6390_g1_monitor_write(chip, ptr, port); 364 } 365 366 int mv88e6390_g1_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip) 367 { 368 u16 ptr; 369 int err; 370 371 /* 01:80:c2:00:00:00-01:80:c2:00:00:07 are Management */ 372 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C200000XLO; 373 err = mv88e6390_g1_monitor_write(chip, ptr, 0xff); 374 if (err) 375 return err; 376 377 /* 01:80:c2:00:00:08-01:80:c2:00:00:0f are Management */ 378 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C200000XHI; 379 err = mv88e6390_g1_monitor_write(chip, ptr, 0xff); 380 if (err) 381 return err; 382 383 /* 01:80:c2:00:00:20-01:80:c2:00:00:27 are Management */ 384 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C200002XLO; 385 err = mv88e6390_g1_monitor_write(chip, ptr, 0xff); 386 if (err) 387 return err; 388 389 /* 01:80:c2:00:00:28-01:80:c2:00:00:2f are Management */ 390 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C200002XHI; 391 err = mv88e6390_g1_monitor_write(chip, ptr, 0xff); 392 if (err) 393 return err; 394 395 return 0; 396 } 397 398 /* Offset 0x1c: Global Control 2 */ 399 400 static int mv88e6xxx_g1_ctl2_mask(struct mv88e6xxx_chip *chip, u16 mask, 401 u16 val) 402 { 403 u16 reg; 404 int err; 405 406 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL2, ®); 407 if (err) 408 return err; 409 410 reg &= ~mask; 411 reg |= val & mask; 412 413 return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL2, reg); 414 } 415 416 int mv88e6185_g1_set_cascade_port(struct mv88e6xxx_chip *chip, int port) 417 { 418 const u16 mask = MV88E6185_G1_CTL2_CASCADE_PORT_MASK; 419 420 return mv88e6xxx_g1_ctl2_mask(chip, mask, port << __bf_shf(mask)); 421 } 422 423 int mv88e6085_g1_rmu_disable(struct mv88e6xxx_chip *chip) 424 { 425 return mv88e6xxx_g1_ctl2_mask(chip, MV88E6085_G1_CTL2_P10RM | 426 MV88E6085_G1_CTL2_RM_ENABLE, 0); 427 } 428 429 int mv88e6352_g1_rmu_disable(struct mv88e6xxx_chip *chip) 430 { 431 return mv88e6xxx_g1_ctl2_mask(chip, MV88E6352_G1_CTL2_RMU_MODE_MASK, 432 MV88E6352_G1_CTL2_RMU_MODE_DISABLED); 433 } 434 435 int mv88e6390_g1_rmu_disable(struct mv88e6xxx_chip *chip) 436 { 437 return mv88e6xxx_g1_ctl2_mask(chip, MV88E6390_G1_CTL2_RMU_MODE_MASK, 438 MV88E6390_G1_CTL2_RMU_MODE_DISABLED); 439 } 440 441 int mv88e6390_g1_stats_set_histogram(struct mv88e6xxx_chip *chip) 442 { 443 return mv88e6xxx_g1_ctl2_mask(chip, MV88E6390_G1_CTL2_HIST_MODE_MASK, 444 MV88E6390_G1_CTL2_HIST_MODE_RX | 445 MV88E6390_G1_CTL2_HIST_MODE_TX); 446 } 447 448 int mv88e6xxx_g1_set_device_number(struct mv88e6xxx_chip *chip, int index) 449 { 450 return mv88e6xxx_g1_ctl2_mask(chip, 451 MV88E6XXX_G1_CTL2_DEVICE_NUMBER_MASK, 452 index); 453 } 454 455 /* Offset 0x1d: Statistics Operation 2 */ 456 457 static int mv88e6xxx_g1_stats_wait(struct mv88e6xxx_chip *chip) 458 { 459 int bit = __bf_shf(MV88E6XXX_G1_STATS_OP_BUSY); 460 461 return mv88e6xxx_g1_wait_bit(chip, MV88E6XXX_G1_STATS_OP, bit, 0); 462 } 463 464 int mv88e6095_g1_stats_set_histogram(struct mv88e6xxx_chip *chip) 465 { 466 u16 val; 467 int err; 468 469 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_OP, &val); 470 if (err) 471 return err; 472 473 val |= MV88E6XXX_G1_STATS_OP_HIST_RX_TX; 474 475 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, val); 476 477 return err; 478 } 479 480 int mv88e6xxx_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port) 481 { 482 int err; 483 484 /* Snapshot the hardware statistics counters for this port. */ 485 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, 486 MV88E6XXX_G1_STATS_OP_BUSY | 487 MV88E6XXX_G1_STATS_OP_CAPTURE_PORT | 488 MV88E6XXX_G1_STATS_OP_HIST_RX_TX | port); 489 if (err) 490 return err; 491 492 /* Wait for the snapshotting to complete. */ 493 return mv88e6xxx_g1_stats_wait(chip); 494 } 495 496 int mv88e6320_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port) 497 { 498 port = (port + 1) << 5; 499 500 return mv88e6xxx_g1_stats_snapshot(chip, port); 501 } 502 503 int mv88e6390_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port) 504 { 505 int err; 506 507 port = (port + 1) << 5; 508 509 /* Snapshot the hardware statistics counters for this port. */ 510 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, 511 MV88E6XXX_G1_STATS_OP_BUSY | 512 MV88E6XXX_G1_STATS_OP_CAPTURE_PORT | port); 513 if (err) 514 return err; 515 516 /* Wait for the snapshotting to complete. */ 517 return mv88e6xxx_g1_stats_wait(chip); 518 } 519 520 void mv88e6xxx_g1_stats_read(struct mv88e6xxx_chip *chip, int stat, u32 *val) 521 { 522 u32 value; 523 u16 reg; 524 int err; 525 526 *val = 0; 527 528 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, 529 MV88E6XXX_G1_STATS_OP_BUSY | 530 MV88E6XXX_G1_STATS_OP_READ_CAPTURED | stat); 531 if (err) 532 return; 533 534 err = mv88e6xxx_g1_stats_wait(chip); 535 if (err) 536 return; 537 538 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_COUNTER_32, ®); 539 if (err) 540 return; 541 542 value = reg << 16; 543 544 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_COUNTER_01, ®); 545 if (err) 546 return; 547 548 *val = value | reg; 549 } 550 551 int mv88e6xxx_g1_stats_clear(struct mv88e6xxx_chip *chip) 552 { 553 int err; 554 u16 val; 555 556 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_OP, &val); 557 if (err) 558 return err; 559 560 /* Keep the histogram mode bits */ 561 val &= MV88E6XXX_G1_STATS_OP_HIST_RX_TX; 562 val |= MV88E6XXX_G1_STATS_OP_BUSY | MV88E6XXX_G1_STATS_OP_FLUSH_ALL; 563 564 err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, val); 565 if (err) 566 return err; 567 568 /* Wait for the flush to complete. */ 569 return mv88e6xxx_g1_stats_wait(chip); 570 } 571