1 /* 2 * Allwinner Sun8i Ethernet MAC emulation 3 * 4 * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com> 5 * 6 * This program is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu/units.h" 22 #include "hw/sysbus.h" 23 #include "migration/vmstate.h" 24 #include "net/net.h" 25 #include "hw/irq.h" 26 #include "hw/qdev-properties.h" 27 #include "qemu/log.h" 28 #include "trace.h" 29 #include "net/checksum.h" 30 #include "qemu/module.h" 31 #include "exec/cpu-common.h" 32 #include "hw/net/allwinner-sun8i-emac.h" 33 34 /* EMAC register offsets */ 35 enum { 36 REG_BASIC_CTL_0 = 0x0000, /* Basic Control 0 */ 37 REG_BASIC_CTL_1 = 0x0004, /* Basic Control 1 */ 38 REG_INT_STA = 0x0008, /* Interrupt Status */ 39 REG_INT_EN = 0x000C, /* Interrupt Enable */ 40 REG_TX_CTL_0 = 0x0010, /* Transmit Control 0 */ 41 REG_TX_CTL_1 = 0x0014, /* Transmit Control 1 */ 42 REG_TX_FLOW_CTL = 0x001C, /* Transmit Flow Control */ 43 REG_TX_DMA_DESC_LIST = 0x0020, /* Transmit Descriptor List Address */ 44 REG_RX_CTL_0 = 0x0024, /* Receive Control 0 */ 45 REG_RX_CTL_1 = 0x0028, /* Receive Control 1 */ 46 REG_RX_DMA_DESC_LIST = 0x0034, /* Receive Descriptor List Address */ 47 REG_FRM_FLT = 0x0038, /* Receive Frame Filter */ 48 REG_RX_HASH_0 = 0x0040, /* Receive Hash Table 0 */ 49 REG_RX_HASH_1 = 0x0044, /* Receive Hash Table 1 */ 50 REG_MII_CMD = 0x0048, /* Management Interface Command */ 51 REG_MII_DATA = 0x004C, /* Management Interface Data */ 52 REG_ADDR_HIGH = 0x0050, /* MAC Address High */ 53 REG_ADDR_LOW = 0x0054, /* MAC Address Low */ 54 REG_TX_DMA_STA = 0x00B0, /* Transmit DMA Status */ 55 REG_TX_CUR_DESC = 0x00B4, /* Transmit Current Descriptor */ 56 REG_TX_CUR_BUF = 0x00B8, /* Transmit Current Buffer */ 57 REG_RX_DMA_STA = 0x00C0, /* Receive DMA Status */ 58 REG_RX_CUR_DESC = 0x00C4, /* Receive Current Descriptor */ 59 REG_RX_CUR_BUF = 0x00C8, /* Receive Current Buffer */ 60 REG_RGMII_STA = 0x00D0, /* RGMII Status */ 61 }; 62 63 /* EMAC register flags */ 64 enum { 65 BASIC_CTL0_100Mbps = (0b11 << 2), 66 BASIC_CTL0_FD = (1 << 0), 67 BASIC_CTL1_SOFTRST = (1 << 0), 68 }; 69 70 enum { 71 INT_STA_RGMII_LINK = (1 << 16), 72 INT_STA_RX_EARLY = (1 << 13), 73 INT_STA_RX_OVERFLOW = (1 << 12), 74 INT_STA_RX_TIMEOUT = (1 << 11), 75 INT_STA_RX_DMA_STOP = (1 << 10), 76 INT_STA_RX_BUF_UA = (1 << 9), 77 INT_STA_RX = (1 << 8), 78 INT_STA_TX_EARLY = (1 << 5), 79 INT_STA_TX_UNDERFLOW = (1 << 4), 80 INT_STA_TX_TIMEOUT = (1 << 3), 81 INT_STA_TX_BUF_UA = (1 << 2), 82 INT_STA_TX_DMA_STOP = (1 << 1), 83 INT_STA_TX = (1 << 0), 84 }; 85 86 enum { 87 INT_EN_RX_EARLY = (1 << 13), 88 INT_EN_RX_OVERFLOW = (1 << 12), 89 INT_EN_RX_TIMEOUT = (1 << 11), 90 INT_EN_RX_DMA_STOP = (1 << 10), 91 INT_EN_RX_BUF_UA = (1 << 9), 92 INT_EN_RX = (1 << 8), 93 INT_EN_TX_EARLY = (1 << 5), 94 INT_EN_TX_UNDERFLOW = (1 << 4), 95 INT_EN_TX_TIMEOUT = (1 << 3), 96 INT_EN_TX_BUF_UA = (1 << 2), 97 INT_EN_TX_DMA_STOP = (1 << 1), 98 INT_EN_TX = (1 << 0), 99 }; 100 101 enum { 102 TX_CTL0_TX_EN = (1 << 31), 103 TX_CTL1_TX_DMA_START = (1 << 31), 104 TX_CTL1_TX_DMA_EN = (1 << 30), 105 TX_CTL1_TX_FLUSH = (1 << 0), 106 }; 107 108 enum { 109 RX_CTL0_RX_EN = (1 << 31), 110 RX_CTL0_STRIP_FCS = (1 << 28), 111 RX_CTL0_CRC_IPV4 = (1 << 27), 112 }; 113 114 enum { 115 RX_CTL1_RX_DMA_START = (1 << 31), 116 RX_CTL1_RX_DMA_EN = (1 << 30), 117 RX_CTL1_RX_MD = (1 << 1), 118 }; 119 120 enum { 121 RX_FRM_FLT_DIS_ADDR = (1 << 31), 122 }; 123 124 enum { 125 MII_CMD_PHY_ADDR_SHIFT = (12), 126 MII_CMD_PHY_ADDR_MASK = (0xf000), 127 MII_CMD_PHY_REG_SHIFT = (4), 128 MII_CMD_PHY_REG_MASK = (0xf0), 129 MII_CMD_PHY_RW = (1 << 1), 130 MII_CMD_PHY_BUSY = (1 << 0), 131 }; 132 133 enum { 134 TX_DMA_STA_STOP = (0b000), 135 TX_DMA_STA_RUN_FETCH = (0b001), 136 TX_DMA_STA_WAIT_STA = (0b010), 137 }; 138 139 enum { 140 RX_DMA_STA_STOP = (0b000), 141 RX_DMA_STA_RUN_FETCH = (0b001), 142 RX_DMA_STA_WAIT_FRM = (0b011), 143 }; 144 145 /* EMAC register reset values */ 146 enum { 147 REG_BASIC_CTL_1_RST = 0x08000000, 148 }; 149 150 /* EMAC constants */ 151 enum { 152 AW_SUN8I_EMAC_MIN_PKT_SZ = 64 153 }; 154 155 /* Transmit/receive frame descriptor */ 156 typedef struct FrameDescriptor { 157 uint32_t status; 158 uint32_t status2; 159 uint32_t addr; 160 uint32_t next; 161 } FrameDescriptor; 162 163 /* Frame descriptor flags */ 164 enum { 165 DESC_STATUS_CTL = (1 << 31), 166 DESC_STATUS2_BUF_SIZE_MASK = (0x7ff), 167 }; 168 169 /* Transmit frame descriptor flags */ 170 enum { 171 TX_DESC_STATUS_LENGTH_ERR = (1 << 14), 172 TX_DESC_STATUS2_FIRST_DESC = (1 << 29), 173 TX_DESC_STATUS2_LAST_DESC = (1 << 30), 174 TX_DESC_STATUS2_CHECKSUM_MASK = (0x3 << 27), 175 }; 176 177 /* Receive frame descriptor flags */ 178 enum { 179 RX_DESC_STATUS_FIRST_DESC = (1 << 9), 180 RX_DESC_STATUS_LAST_DESC = (1 << 8), 181 RX_DESC_STATUS_FRM_LEN_MASK = (0x3fff0000), 182 RX_DESC_STATUS_FRM_LEN_SHIFT = (16), 183 RX_DESC_STATUS_NO_BUF = (1 << 14), 184 RX_DESC_STATUS_HEADER_ERR = (1 << 7), 185 RX_DESC_STATUS_LENGTH_ERR = (1 << 4), 186 RX_DESC_STATUS_CRC_ERR = (1 << 1), 187 RX_DESC_STATUS_PAYLOAD_ERR = (1 << 0), 188 RX_DESC_STATUS2_RX_INT_CTL = (1 << 31), 189 }; 190 191 /* MII register offsets */ 192 enum { 193 MII_REG_CR = (0x0), /* Control */ 194 MII_REG_ST = (0x1), /* Status */ 195 MII_REG_ID_HIGH = (0x2), /* Identifier High */ 196 MII_REG_ID_LOW = (0x3), /* Identifier Low */ 197 MII_REG_ADV = (0x4), /* Advertised abilities */ 198 MII_REG_LPA = (0x5), /* Link partner abilities */ 199 }; 200 201 /* MII register flags */ 202 enum { 203 MII_REG_CR_RESET = (1 << 15), 204 MII_REG_CR_POWERDOWN = (1 << 11), 205 MII_REG_CR_10Mbit = (0), 206 MII_REG_CR_100Mbit = (1 << 13), 207 MII_REG_CR_1000Mbit = (1 << 6), 208 MII_REG_CR_AUTO_NEG = (1 << 12), 209 MII_REG_CR_AUTO_NEG_RESTART = (1 << 9), 210 MII_REG_CR_FULLDUPLEX = (1 << 8), 211 }; 212 213 enum { 214 MII_REG_ST_100BASE_T4 = (1 << 15), 215 MII_REG_ST_100BASE_X_FD = (1 << 14), 216 MII_REG_ST_100BASE_X_HD = (1 << 13), 217 MII_REG_ST_10_FD = (1 << 12), 218 MII_REG_ST_10_HD = (1 << 11), 219 MII_REG_ST_100BASE_T2_FD = (1 << 10), 220 MII_REG_ST_100BASE_T2_HD = (1 << 9), 221 MII_REG_ST_AUTONEG_COMPLETE = (1 << 5), 222 MII_REG_ST_AUTONEG_AVAIL = (1 << 3), 223 MII_REG_ST_LINK_UP = (1 << 2), 224 }; 225 226 enum { 227 MII_REG_LPA_10_HD = (1 << 5), 228 MII_REG_LPA_10_FD = (1 << 6), 229 MII_REG_LPA_100_HD = (1 << 7), 230 MII_REG_LPA_100_FD = (1 << 8), 231 MII_REG_LPA_PAUSE = (1 << 10), 232 MII_REG_LPA_ASYMPAUSE = (1 << 11), 233 }; 234 235 /* MII constants */ 236 enum { 237 MII_PHY_ID_HIGH = 0x0044, 238 MII_PHY_ID_LOW = 0x1400, 239 }; 240 241 static void allwinner_sun8i_emac_mii_set_link(AwSun8iEmacState *s, 242 bool link_active) 243 { 244 if (link_active) { 245 s->mii_st |= MII_REG_ST_LINK_UP; 246 } else { 247 s->mii_st &= ~MII_REG_ST_LINK_UP; 248 } 249 } 250 251 static void allwinner_sun8i_emac_mii_reset(AwSun8iEmacState *s, 252 bool link_active) 253 { 254 s->mii_cr = MII_REG_CR_100Mbit | MII_REG_CR_AUTO_NEG | 255 MII_REG_CR_FULLDUPLEX; 256 s->mii_st = MII_REG_ST_100BASE_T4 | MII_REG_ST_100BASE_X_FD | 257 MII_REG_ST_100BASE_X_HD | MII_REG_ST_10_FD | MII_REG_ST_10_HD | 258 MII_REG_ST_100BASE_T2_FD | MII_REG_ST_100BASE_T2_HD | 259 MII_REG_ST_AUTONEG_COMPLETE | MII_REG_ST_AUTONEG_AVAIL; 260 s->mii_adv = 0; 261 262 allwinner_sun8i_emac_mii_set_link(s, link_active); 263 } 264 265 static void allwinner_sun8i_emac_mii_cmd(AwSun8iEmacState *s) 266 { 267 uint8_t addr, reg; 268 269 addr = (s->mii_cmd & MII_CMD_PHY_ADDR_MASK) >> MII_CMD_PHY_ADDR_SHIFT; 270 reg = (s->mii_cmd & MII_CMD_PHY_REG_MASK) >> MII_CMD_PHY_REG_SHIFT; 271 272 if (addr != s->mii_phy_addr) { 273 return; 274 } 275 276 /* Read or write a PHY register? */ 277 if (s->mii_cmd & MII_CMD_PHY_RW) { 278 trace_allwinner_sun8i_emac_mii_write_reg(reg, s->mii_data); 279 280 switch (reg) { 281 case MII_REG_CR: 282 if (s->mii_data & MII_REG_CR_RESET) { 283 allwinner_sun8i_emac_mii_reset(s, s->mii_st & 284 MII_REG_ST_LINK_UP); 285 } else { 286 s->mii_cr = s->mii_data & ~(MII_REG_CR_RESET | 287 MII_REG_CR_AUTO_NEG_RESTART); 288 } 289 break; 290 case MII_REG_ADV: 291 s->mii_adv = s->mii_data; 292 break; 293 case MII_REG_ID_HIGH: 294 case MII_REG_ID_LOW: 295 case MII_REG_LPA: 296 break; 297 default: 298 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to " 299 "unknown MII register 0x%x\n", reg); 300 break; 301 } 302 } else { 303 switch (reg) { 304 case MII_REG_CR: 305 s->mii_data = s->mii_cr; 306 break; 307 case MII_REG_ST: 308 s->mii_data = s->mii_st; 309 break; 310 case MII_REG_ID_HIGH: 311 s->mii_data = MII_PHY_ID_HIGH; 312 break; 313 case MII_REG_ID_LOW: 314 s->mii_data = MII_PHY_ID_LOW; 315 break; 316 case MII_REG_ADV: 317 s->mii_data = s->mii_adv; 318 break; 319 case MII_REG_LPA: 320 s->mii_data = MII_REG_LPA_10_HD | MII_REG_LPA_10_FD | 321 MII_REG_LPA_100_HD | MII_REG_LPA_100_FD | 322 MII_REG_LPA_PAUSE | MII_REG_LPA_ASYMPAUSE; 323 break; 324 default: 325 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to " 326 "unknown MII register 0x%x\n", reg); 327 s->mii_data = 0; 328 break; 329 } 330 331 trace_allwinner_sun8i_emac_mii_read_reg(reg, s->mii_data); 332 } 333 } 334 335 static void allwinner_sun8i_emac_update_irq(AwSun8iEmacState *s) 336 { 337 qemu_set_irq(s->irq, (s->int_sta & s->int_en) != 0); 338 } 339 340 static uint32_t allwinner_sun8i_emac_next_desc(FrameDescriptor *desc, 341 size_t min_size) 342 { 343 uint32_t paddr = desc->next; 344 345 cpu_physical_memory_read(paddr, desc, sizeof(*desc)); 346 347 if ((desc->status & DESC_STATUS_CTL) && 348 (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_size) { 349 return paddr; 350 } else { 351 return 0; 352 } 353 } 354 355 static uint32_t allwinner_sun8i_emac_get_desc(FrameDescriptor *desc, 356 uint32_t start_addr, 357 size_t min_size) 358 { 359 uint32_t desc_addr = start_addr; 360 361 /* Note that the list is a cycle. Last entry points back to the head. */ 362 while (desc_addr != 0) { 363 cpu_physical_memory_read(desc_addr, desc, sizeof(*desc)); 364 365 if ((desc->status & DESC_STATUS_CTL) && 366 (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_size) { 367 return desc_addr; 368 } else if (desc->next == start_addr) { 369 break; 370 } else { 371 desc_addr = desc->next; 372 } 373 } 374 375 return 0; 376 } 377 378 static uint32_t allwinner_sun8i_emac_rx_desc(AwSun8iEmacState *s, 379 FrameDescriptor *desc, 380 size_t min_size) 381 { 382 return allwinner_sun8i_emac_get_desc(desc, s->rx_desc_curr, min_size); 383 } 384 385 static uint32_t allwinner_sun8i_emac_tx_desc(AwSun8iEmacState *s, 386 FrameDescriptor *desc, 387 size_t min_size) 388 { 389 return allwinner_sun8i_emac_get_desc(desc, s->tx_desc_head, min_size); 390 } 391 392 static void allwinner_sun8i_emac_flush_desc(FrameDescriptor *desc, 393 uint32_t phys_addr) 394 { 395 cpu_physical_memory_write(phys_addr, desc, sizeof(*desc)); 396 } 397 398 static bool allwinner_sun8i_emac_can_receive(NetClientState *nc) 399 { 400 AwSun8iEmacState *s = qemu_get_nic_opaque(nc); 401 FrameDescriptor desc; 402 403 return (s->rx_ctl0 & RX_CTL0_RX_EN) && 404 (allwinner_sun8i_emac_rx_desc(s, &desc, 0) != 0); 405 } 406 407 static ssize_t allwinner_sun8i_emac_receive(NetClientState *nc, 408 const uint8_t *buf, 409 size_t size) 410 { 411 AwSun8iEmacState *s = qemu_get_nic_opaque(nc); 412 FrameDescriptor desc; 413 size_t bytes_left = size; 414 size_t desc_bytes = 0; 415 size_t pad_fcs_size = 4; 416 size_t padding = 0; 417 418 if (!(s->rx_ctl0 & RX_CTL0_RX_EN)) { 419 return -1; 420 } 421 422 s->rx_desc_curr = allwinner_sun8i_emac_rx_desc(s, &desc, 423 AW_SUN8I_EMAC_MIN_PKT_SZ); 424 if (!s->rx_desc_curr) { 425 s->int_sta |= INT_STA_RX_BUF_UA; 426 } 427 428 /* Keep filling RX descriptors until the whole frame is written */ 429 while (s->rx_desc_curr && bytes_left > 0) { 430 desc.status &= ~DESC_STATUS_CTL; 431 desc.status &= ~RX_DESC_STATUS_FRM_LEN_MASK; 432 433 if (bytes_left == size) { 434 desc.status |= RX_DESC_STATUS_FIRST_DESC; 435 } 436 437 if ((desc.status2 & DESC_STATUS2_BUF_SIZE_MASK) < 438 (bytes_left + pad_fcs_size)) { 439 desc_bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK; 440 desc.status |= desc_bytes << RX_DESC_STATUS_FRM_LEN_SHIFT; 441 } else { 442 padding = pad_fcs_size; 443 if (bytes_left < AW_SUN8I_EMAC_MIN_PKT_SZ) { 444 padding += (AW_SUN8I_EMAC_MIN_PKT_SZ - bytes_left); 445 } 446 447 desc_bytes = (bytes_left); 448 desc.status |= RX_DESC_STATUS_LAST_DESC; 449 desc.status |= (bytes_left + padding) 450 << RX_DESC_STATUS_FRM_LEN_SHIFT; 451 } 452 453 cpu_physical_memory_write(desc.addr, buf, desc_bytes); 454 allwinner_sun8i_emac_flush_desc(&desc, s->rx_desc_curr); 455 trace_allwinner_sun8i_emac_receive(s->rx_desc_curr, desc.addr, 456 desc_bytes); 457 458 /* Check if frame needs to raise the receive interrupt */ 459 if (!(desc.status2 & RX_DESC_STATUS2_RX_INT_CTL)) { 460 s->int_sta |= INT_STA_RX; 461 } 462 463 /* Increment variables */ 464 buf += desc_bytes; 465 bytes_left -= desc_bytes; 466 467 /* Move to the next descriptor */ 468 s->rx_desc_curr = allwinner_sun8i_emac_next_desc(&desc, 64); 469 if (!s->rx_desc_curr) { 470 /* Not enough buffer space available */ 471 s->int_sta |= INT_STA_RX_BUF_UA; 472 s->rx_desc_curr = s->rx_desc_head; 473 break; 474 } 475 } 476 477 /* Report receive DMA is finished */ 478 s->rx_ctl1 &= ~RX_CTL1_RX_DMA_START; 479 allwinner_sun8i_emac_update_irq(s); 480 481 return size; 482 } 483 484 static void allwinner_sun8i_emac_transmit(AwSun8iEmacState *s) 485 { 486 NetClientState *nc = qemu_get_queue(s->nic); 487 FrameDescriptor desc; 488 size_t bytes = 0; 489 size_t packet_bytes = 0; 490 size_t transmitted = 0; 491 static uint8_t packet_buf[2048]; 492 493 s->tx_desc_curr = allwinner_sun8i_emac_tx_desc(s, &desc, 0); 494 495 /* Read all transmit descriptors */ 496 while (s->tx_desc_curr != 0) { 497 498 /* Read from physical memory into packet buffer */ 499 bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK; 500 if (bytes + packet_bytes > sizeof(packet_buf)) { 501 desc.status |= TX_DESC_STATUS_LENGTH_ERR; 502 break; 503 } 504 cpu_physical_memory_read(desc.addr, packet_buf + packet_bytes, bytes); 505 packet_bytes += bytes; 506 desc.status &= ~DESC_STATUS_CTL; 507 allwinner_sun8i_emac_flush_desc(&desc, s->tx_desc_curr); 508 509 /* After the last descriptor, send the packet */ 510 if (desc.status2 & TX_DESC_STATUS2_LAST_DESC) { 511 if (desc.status2 & TX_DESC_STATUS2_CHECKSUM_MASK) { 512 net_checksum_calculate(packet_buf, packet_bytes); 513 } 514 515 qemu_send_packet(nc, packet_buf, packet_bytes); 516 trace_allwinner_sun8i_emac_transmit(s->tx_desc_curr, desc.addr, 517 bytes); 518 519 packet_bytes = 0; 520 transmitted++; 521 } 522 s->tx_desc_curr = allwinner_sun8i_emac_next_desc(&desc, 0); 523 } 524 525 /* Raise transmit completed interrupt */ 526 if (transmitted > 0) { 527 s->int_sta |= INT_STA_TX; 528 s->tx_ctl1 &= ~TX_CTL1_TX_DMA_START; 529 allwinner_sun8i_emac_update_irq(s); 530 } 531 } 532 533 static void allwinner_sun8i_emac_reset(DeviceState *dev) 534 { 535 AwSun8iEmacState *s = AW_SUN8I_EMAC(dev); 536 NetClientState *nc = qemu_get_queue(s->nic); 537 538 trace_allwinner_sun8i_emac_reset(); 539 540 s->mii_cmd = 0; 541 s->mii_data = 0; 542 s->basic_ctl0 = 0; 543 s->basic_ctl1 = REG_BASIC_CTL_1_RST; 544 s->int_en = 0; 545 s->int_sta = 0; 546 s->frm_flt = 0; 547 s->rx_ctl0 = 0; 548 s->rx_ctl1 = RX_CTL1_RX_MD; 549 s->rx_desc_head = 0; 550 s->rx_desc_curr = 0; 551 s->tx_ctl0 = 0; 552 s->tx_ctl1 = 0; 553 s->tx_desc_head = 0; 554 s->tx_desc_curr = 0; 555 s->tx_flowctl = 0; 556 557 allwinner_sun8i_emac_mii_reset(s, !nc->link_down); 558 } 559 560 static uint64_t allwinner_sun8i_emac_read(void *opaque, hwaddr offset, 561 unsigned size) 562 { 563 AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque); 564 uint64_t value = 0; 565 FrameDescriptor desc; 566 567 switch (offset) { 568 case REG_BASIC_CTL_0: /* Basic Control 0 */ 569 value = s->basic_ctl0; 570 break; 571 case REG_BASIC_CTL_1: /* Basic Control 1 */ 572 value = s->basic_ctl1; 573 break; 574 case REG_INT_STA: /* Interrupt Status */ 575 value = s->int_sta; 576 break; 577 case REG_INT_EN: /* Interupt Enable */ 578 value = s->int_en; 579 break; 580 case REG_TX_CTL_0: /* Transmit Control 0 */ 581 value = s->tx_ctl0; 582 break; 583 case REG_TX_CTL_1: /* Transmit Control 1 */ 584 value = s->tx_ctl1; 585 break; 586 case REG_TX_FLOW_CTL: /* Transmit Flow Control */ 587 value = s->tx_flowctl; 588 break; 589 case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */ 590 value = s->tx_desc_head; 591 break; 592 case REG_RX_CTL_0: /* Receive Control 0 */ 593 value = s->rx_ctl0; 594 break; 595 case REG_RX_CTL_1: /* Receive Control 1 */ 596 value = s->rx_ctl1; 597 break; 598 case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */ 599 value = s->rx_desc_head; 600 break; 601 case REG_FRM_FLT: /* Receive Frame Filter */ 602 value = s->frm_flt; 603 break; 604 case REG_RX_HASH_0: /* Receive Hash Table 0 */ 605 case REG_RX_HASH_1: /* Receive Hash Table 1 */ 606 break; 607 case REG_MII_CMD: /* Management Interface Command */ 608 value = s->mii_cmd; 609 break; 610 case REG_MII_DATA: /* Management Interface Data */ 611 value = s->mii_data; 612 break; 613 case REG_ADDR_HIGH: /* MAC Address High */ 614 value = lduw_le_p(s->conf.macaddr.a + 4); 615 break; 616 case REG_ADDR_LOW: /* MAC Address Low */ 617 value = ldl_le_p(s->conf.macaddr.a); 618 break; 619 case REG_TX_DMA_STA: /* Transmit DMA Status */ 620 break; 621 case REG_TX_CUR_DESC: /* Transmit Current Descriptor */ 622 value = s->tx_desc_curr; 623 break; 624 case REG_TX_CUR_BUF: /* Transmit Current Buffer */ 625 if (s->tx_desc_curr != 0) { 626 cpu_physical_memory_read(s->tx_desc_curr, &desc, sizeof(desc)); 627 value = desc.addr; 628 } else { 629 value = 0; 630 } 631 break; 632 case REG_RX_DMA_STA: /* Receive DMA Status */ 633 break; 634 case REG_RX_CUR_DESC: /* Receive Current Descriptor */ 635 value = s->rx_desc_curr; 636 break; 637 case REG_RX_CUR_BUF: /* Receive Current Buffer */ 638 if (s->rx_desc_curr != 0) { 639 cpu_physical_memory_read(s->rx_desc_curr, &desc, sizeof(desc)); 640 value = desc.addr; 641 } else { 642 value = 0; 643 } 644 break; 645 case REG_RGMII_STA: /* RGMII Status */ 646 break; 647 default: 648 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to unknown " 649 "EMAC register 0x" TARGET_FMT_plx "\n", 650 offset); 651 } 652 653 trace_allwinner_sun8i_emac_read(offset, value); 654 return value; 655 } 656 657 static void allwinner_sun8i_emac_write(void *opaque, hwaddr offset, 658 uint64_t value, unsigned size) 659 { 660 AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque); 661 NetClientState *nc = qemu_get_queue(s->nic); 662 663 trace_allwinner_sun8i_emac_write(offset, value); 664 665 switch (offset) { 666 case REG_BASIC_CTL_0: /* Basic Control 0 */ 667 s->basic_ctl0 = value; 668 break; 669 case REG_BASIC_CTL_1: /* Basic Control 1 */ 670 if (value & BASIC_CTL1_SOFTRST) { 671 allwinner_sun8i_emac_reset(DEVICE(s)); 672 value &= ~BASIC_CTL1_SOFTRST; 673 } 674 s->basic_ctl1 = value; 675 if (allwinner_sun8i_emac_can_receive(nc)) { 676 qemu_flush_queued_packets(nc); 677 } 678 break; 679 case REG_INT_STA: /* Interrupt Status */ 680 s->int_sta &= ~value; 681 allwinner_sun8i_emac_update_irq(s); 682 break; 683 case REG_INT_EN: /* Interrupt Enable */ 684 s->int_en = value; 685 allwinner_sun8i_emac_update_irq(s); 686 break; 687 case REG_TX_CTL_0: /* Transmit Control 0 */ 688 s->tx_ctl0 = value; 689 break; 690 case REG_TX_CTL_1: /* Transmit Control 1 */ 691 s->tx_ctl1 = value; 692 if (value & TX_CTL1_TX_DMA_EN) { 693 allwinner_sun8i_emac_transmit(s); 694 } 695 break; 696 case REG_TX_FLOW_CTL: /* Transmit Flow Control */ 697 s->tx_flowctl = value; 698 break; 699 case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */ 700 s->tx_desc_head = value; 701 s->tx_desc_curr = value; 702 break; 703 case REG_RX_CTL_0: /* Receive Control 0 */ 704 s->rx_ctl0 = value; 705 break; 706 case REG_RX_CTL_1: /* Receive Control 1 */ 707 s->rx_ctl1 = value | RX_CTL1_RX_MD; 708 if ((value & RX_CTL1_RX_DMA_EN) && 709 allwinner_sun8i_emac_can_receive(nc)) { 710 qemu_flush_queued_packets(nc); 711 } 712 break; 713 case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */ 714 s->rx_desc_head = value; 715 s->rx_desc_curr = value; 716 break; 717 case REG_FRM_FLT: /* Receive Frame Filter */ 718 s->frm_flt = value; 719 break; 720 case REG_RX_HASH_0: /* Receive Hash Table 0 */ 721 case REG_RX_HASH_1: /* Receive Hash Table 1 */ 722 break; 723 case REG_MII_CMD: /* Management Interface Command */ 724 s->mii_cmd = value & ~MII_CMD_PHY_BUSY; 725 allwinner_sun8i_emac_mii_cmd(s); 726 break; 727 case REG_MII_DATA: /* Management Interface Data */ 728 s->mii_data = value; 729 break; 730 case REG_ADDR_HIGH: /* MAC Address High */ 731 stw_le_p(s->conf.macaddr.a + 4, value); 732 break; 733 case REG_ADDR_LOW: /* MAC Address Low */ 734 stl_le_p(s->conf.macaddr.a, value); 735 break; 736 case REG_TX_DMA_STA: /* Transmit DMA Status */ 737 case REG_TX_CUR_DESC: /* Transmit Current Descriptor */ 738 case REG_TX_CUR_BUF: /* Transmit Current Buffer */ 739 case REG_RX_DMA_STA: /* Receive DMA Status */ 740 case REG_RX_CUR_DESC: /* Receive Current Descriptor */ 741 case REG_RX_CUR_BUF: /* Receive Current Buffer */ 742 case REG_RGMII_STA: /* RGMII Status */ 743 break; 744 default: 745 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to unknown " 746 "EMAC register 0x" TARGET_FMT_plx "\n", 747 offset); 748 } 749 } 750 751 static void allwinner_sun8i_emac_set_link(NetClientState *nc) 752 { 753 AwSun8iEmacState *s = qemu_get_nic_opaque(nc); 754 755 trace_allwinner_sun8i_emac_set_link(!nc->link_down); 756 allwinner_sun8i_emac_mii_set_link(s, !nc->link_down); 757 } 758 759 static const MemoryRegionOps allwinner_sun8i_emac_mem_ops = { 760 .read = allwinner_sun8i_emac_read, 761 .write = allwinner_sun8i_emac_write, 762 .endianness = DEVICE_NATIVE_ENDIAN, 763 .valid = { 764 .min_access_size = 4, 765 .max_access_size = 4, 766 }, 767 .impl.min_access_size = 4, 768 }; 769 770 static NetClientInfo net_allwinner_sun8i_emac_info = { 771 .type = NET_CLIENT_DRIVER_NIC, 772 .size = sizeof(NICState), 773 .can_receive = allwinner_sun8i_emac_can_receive, 774 .receive = allwinner_sun8i_emac_receive, 775 .link_status_changed = allwinner_sun8i_emac_set_link, 776 }; 777 778 static void allwinner_sun8i_emac_init(Object *obj) 779 { 780 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 781 AwSun8iEmacState *s = AW_SUN8I_EMAC(obj); 782 783 memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sun8i_emac_mem_ops, 784 s, TYPE_AW_SUN8I_EMAC, 64 * KiB); 785 sysbus_init_mmio(sbd, &s->iomem); 786 sysbus_init_irq(sbd, &s->irq); 787 } 788 789 static void allwinner_sun8i_emac_realize(DeviceState *dev, Error **errp) 790 { 791 AwSun8iEmacState *s = AW_SUN8I_EMAC(dev); 792 793 qemu_macaddr_default_if_unset(&s->conf.macaddr); 794 s->nic = qemu_new_nic(&net_allwinner_sun8i_emac_info, &s->conf, 795 object_get_typename(OBJECT(dev)), dev->id, s); 796 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); 797 } 798 799 static Property allwinner_sun8i_emac_properties[] = { 800 DEFINE_NIC_PROPERTIES(AwSun8iEmacState, conf), 801 DEFINE_PROP_UINT8("phy-addr", AwSun8iEmacState, mii_phy_addr, 0), 802 DEFINE_PROP_END_OF_LIST(), 803 }; 804 805 static int allwinner_sun8i_emac_post_load(void *opaque, int version_id) 806 { 807 AwSun8iEmacState *s = opaque; 808 809 allwinner_sun8i_emac_set_link(qemu_get_queue(s->nic)); 810 811 return 0; 812 } 813 814 static const VMStateDescription vmstate_aw_emac = { 815 .name = "allwinner-sun8i-emac", 816 .version_id = 1, 817 .minimum_version_id = 1, 818 .post_load = allwinner_sun8i_emac_post_load, 819 .fields = (VMStateField[]) { 820 VMSTATE_UINT8(mii_phy_addr, AwSun8iEmacState), 821 VMSTATE_UINT32(mii_cmd, AwSun8iEmacState), 822 VMSTATE_UINT32(mii_data, AwSun8iEmacState), 823 VMSTATE_UINT32(mii_cr, AwSun8iEmacState), 824 VMSTATE_UINT32(mii_st, AwSun8iEmacState), 825 VMSTATE_UINT32(mii_adv, AwSun8iEmacState), 826 VMSTATE_UINT32(basic_ctl0, AwSun8iEmacState), 827 VMSTATE_UINT32(basic_ctl1, AwSun8iEmacState), 828 VMSTATE_UINT32(int_en, AwSun8iEmacState), 829 VMSTATE_UINT32(int_sta, AwSun8iEmacState), 830 VMSTATE_UINT32(frm_flt, AwSun8iEmacState), 831 VMSTATE_UINT32(rx_ctl0, AwSun8iEmacState), 832 VMSTATE_UINT32(rx_ctl1, AwSun8iEmacState), 833 VMSTATE_UINT32(rx_desc_head, AwSun8iEmacState), 834 VMSTATE_UINT32(rx_desc_curr, AwSun8iEmacState), 835 VMSTATE_UINT32(tx_ctl0, AwSun8iEmacState), 836 VMSTATE_UINT32(tx_ctl1, AwSun8iEmacState), 837 VMSTATE_UINT32(tx_desc_head, AwSun8iEmacState), 838 VMSTATE_UINT32(tx_desc_curr, AwSun8iEmacState), 839 VMSTATE_UINT32(tx_flowctl, AwSun8iEmacState), 840 VMSTATE_END_OF_LIST() 841 } 842 }; 843 844 static void allwinner_sun8i_emac_class_init(ObjectClass *klass, void *data) 845 { 846 DeviceClass *dc = DEVICE_CLASS(klass); 847 848 dc->realize = allwinner_sun8i_emac_realize; 849 dc->reset = allwinner_sun8i_emac_reset; 850 dc->vmsd = &vmstate_aw_emac; 851 device_class_set_props(dc, allwinner_sun8i_emac_properties); 852 } 853 854 static const TypeInfo allwinner_sun8i_emac_info = { 855 .name = TYPE_AW_SUN8I_EMAC, 856 .parent = TYPE_SYS_BUS_DEVICE, 857 .instance_size = sizeof(AwSun8iEmacState), 858 .instance_init = allwinner_sun8i_emac_init, 859 .class_init = allwinner_sun8i_emac_class_init, 860 }; 861 862 static void allwinner_sun8i_emac_register_types(void) 863 { 864 type_register_static(&allwinner_sun8i_emac_info); 865 } 866 867 type_init(allwinner_sun8i_emac_register_types) 868