hw/lan9118.c

   1 /*
   2  * SMSC LAN9118 Ethernet interface emulation
   3  *
   4  * Copyright (c) 2009 CodeSourcery, LLC.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GNU GPL v2
   8  */
   9
  10 #include "sysbus.h"
  11 #include "net.h"
  12 #include "devices.h"
  13 #include "sysemu.h"
  14 /* For crc32 */
  15 #include <zlib.h>
  16
  17 //#define DEBUG_LAN9118
  18
  19 #ifdef DEBUG_LAN9118
  20 #define DPRINTF(fmt, ...) \
  21 do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  22 #define BADF(fmt, ...) \
  23 do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  24 #else
  25 #define DPRINTF(fmt, ...) do {} while(0)
  26 #define BADF(fmt, ...) \
  27 do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  28 #endif
  29
  30 #define CSR_ID_REV      0x50
  31 #define CSR_IRQ_CFG     0x54
  32 #define CSR_INT_STS     0x58
  33 #define CSR_INT_EN      0x5c
  34 #define CSR_BYTE_TEST   0x64
  35 #define CSR_FIFO_INT    0x68
  36 #define CSR_RX_CFG      0x6c
  37 #define CSR_TX_CFG      0x70
  38 #define CSR_HW_CFG      0x74
  39 #define CSR_RX_DP_CTRL  0x78
  40 #define CSR_RX_FIFO_INF 0x7c
  41 #define CSR_TX_FIFO_INF 0x80
  42 #define CSR_PMT_CTRL    0x84
  43 #define CSR_GPIO_CFG    0x88
  44 #define CSR_GPT_CFG     0x8c
  45 #define CSR_GPT_CNT     0x90
  46 #define CSR_WORD_SWAP   0x98
  47 #define CSR_FREE_RUN    0x9c
  48 #define CSR_RX_DROP     0xa0
  49 #define CSR_MAC_CSR_CMD 0xa4
  50 #define CSR_MAC_CSR_DATA 0xa8
  51 #define CSR_AFC_CFG     0xac
  52 #define CSR_E2P_CMD     0xb0
  53 #define CSR_E2P_DATA    0xb4
  54
  55 /* IRQ_CFG */
  56 #define IRQ_INT         0x00001000
  57 #define IRQ_EN          0x00000100
  58 #define IRQ_POL         0x00000010
  59 #define IRQ_TYPE        0x00000001
  60
  61 /* INT_STS/INT_EN */
  62 #define SW_INT          0x80000000
  63 #define TXSTOP_INT      0x02000000
  64 #define RXSTOP_INT      0x01000000
  65 #define RXDFH_INT       0x00800000
  66 #define TX_IOC_INT      0x00200000
  67 #define RXD_INT         0x00100000
  68 #define GPT_INT         0x00080000
  69 #define PHY_INT         0x00040000
  70 #define PME_INT         0x00020000
  71 #define TXSO_INT        0x00010000
  72 #define RWT_INT         0x00008000
  73 #define RXE_INT         0x00004000
  74 #define TXE_INT         0x00002000
  75 #define TDFU_INT        0x00000800
  76 #define TDFO_INT        0x00000400
  77 #define TDFA_INT        0x00000200
  78 #define TSFF_INT        0x00000100
  79 #define TSFL_INT        0x00000080
  80 #define RXDF_INT        0x00000040
  81 #define RDFL_INT        0x00000020
  82 #define RSFF_INT        0x00000010
  83 #define RSFL_INT        0x00000008
  84 #define GPIO2_INT       0x00000004
  85 #define GPIO1_INT       0x00000002
  86 #define GPIO0_INT       0x00000001
  87 #define RESERVED_INT    0x7c001000
  88
  89 #define MAC_CR          1
  90 #define MAC_ADDRH       2
  91 #define MAC_ADDRL       3
  92 #define MAC_HASHH       4
  93 #define MAC_HASHL       5
  94 #define MAC_MII_ACC     6
  95 #define MAC_MII_DATA    7
  96 #define MAC_FLOW        8
  97 #define MAC_VLAN1       9 /* TODO */
  98 #define MAC_VLAN2       10 /* TODO */
  99 #define MAC_WUFF        11 /* TODO */
 100 #define MAC_WUCSR       12 /* TODO */
 101
 102 #define MAC_CR_RXALL    0x80000000
 103 #define MAC_CR_RCVOWN   0x00800000
 104 #define MAC_CR_LOOPBK   0x00200000
 105 #define MAC_CR_FDPX     0x00100000
 106 #define MAC_CR_MCPAS    0x00080000
 107 #define MAC_CR_PRMS     0x00040000
 108 #define MAC_CR_INVFILT  0x00020000
 109 #define MAC_CR_PASSBAD  0x00010000
 110 #define MAC_CR_HO       0x00008000
 111 #define MAC_CR_HPFILT   0x00002000
 112 #define MAC_CR_LCOLL    0x00001000
 113 #define MAC_CR_BCAST    0x00000800
 114 #define MAC_CR_DISRTY   0x00000400
 115 #define MAC_CR_PADSTR   0x00000100
 116 #define MAC_CR_BOLMT    0x000000c0
 117 #define MAC_CR_DFCHK    0x00000020
 118 #define MAC_CR_TXEN     0x00000008
 119 #define MAC_CR_RXEN     0x00000004
 120 #define MAC_CR_RESERVED 0x7f404213
 121
 122 #define PHY_INT_ENERGYON            0x80
 123 #define PHY_INT_AUTONEG_COMPLETE    0x40
 124 #define PHY_INT_FAULT               0x20
 125 #define PHY_INT_DOWN                0x10
 126 #define PHY_INT_AUTONEG_LP          0x08
 127 #define PHY_INT_PARFAULT            0x04
 128 #define PHY_INT_AUTONEG_PAGE        0x02
 129
 130 #define GPT_TIMER_EN    0x20000000
 131
 132 enum tx_state {
 133     TX_IDLE,
 134     TX_B,
 135     TX_DATA
 136 };
 137
 138 typedef struct {
 139     enum tx_state state;
 140     uint32_t cmd_a;
 141     uint32_t cmd_b;
 142     int buffer_size;
 143     int offset;
 144     int pad;
 145     int fifo_used;
 146     int len;
 147     uint8_t data[2048];
 148 } LAN9118Packet;
 149
 150 typedef struct {
 151     SysBusDevice busdev;
 152     NICState *nic;
 153     NICConf conf;
 154     qemu_irq irq;
 155     MemoryRegion mmio;
 156     ptimer_state *timer;
 157
 158     uint32_t irq_cfg;
 159     uint32_t int_sts;
 160     uint32_t int_en;
 161     uint32_t fifo_int;
 162     uint32_t rx_cfg;
 163     uint32_t tx_cfg;
 164     uint32_t hw_cfg;
 165     uint32_t pmt_ctrl;
 166     uint32_t gpio_cfg;
 167     uint32_t gpt_cfg;
 168     uint32_t word_swap;
 169     uint32_t free_timer_start;
 170     uint32_t mac_cmd;
 171     uint32_t mac_data;
 172     uint32_t afc_cfg;
 173     uint32_t e2p_cmd;
 174     uint32_t e2p_data;
 175
 176     uint32_t mac_cr;
 177     uint32_t mac_hashh;
 178     uint32_t mac_hashl;
 179     uint32_t mac_mii_acc;
 180     uint32_t mac_mii_data;
 181     uint32_t mac_flow;
 182
 183     uint32_t phy_status;
 184     uint32_t phy_control;
 185     uint32_t phy_advertise;
 186     uint32_t phy_int;
 187     uint32_t phy_int_mask;
 188
 189     int eeprom_writable;
 190     uint8_t eeprom[128];
 191
 192     int tx_fifo_size;
 193     LAN9118Packet *txp;
 194     LAN9118Packet tx_packet;
 195
 196     int tx_status_fifo_used;
 197     int tx_status_fifo_head;
 198     uint32_t tx_status_fifo[512];
 199
 200     int rx_status_fifo_size;
 201     int rx_status_fifo_used;
 202     int rx_status_fifo_head;
 203     uint32_t rx_status_fifo[896];
 204     int rx_fifo_size;
 205     int rx_fifo_used;
 206     int rx_fifo_head;
 207     uint32_t rx_fifo[3360];
 208     int rx_packet_size_head;
 209     int rx_packet_size_tail;
 210     int rx_packet_size[1024];
 211
 212     int rxp_offset;
 213     int rxp_size;
 214     int rxp_pad;
 215 } lan9118_state;
 216
 217 static void lan9118_update(lan9118_state *s)
 218 {
 219     int level;
 220
 221     /* TODO: Implement FIFO level IRQs.  */
 222     level = (s->int_sts & s->int_en) != 0;
 223     if (level) {
 224         s->irq_cfg |= IRQ_INT;
 225     } else {
 226         s->irq_cfg &= ~IRQ_INT;
 227     }
 228     if ((s->irq_cfg & IRQ_EN) == 0) {
 229         level = 0;
 230     }
 231     if ((s->irq_cfg & (IRQ_TYPE | IRQ_POL)) != (IRQ_TYPE | IRQ_POL)) {
 232         /* Interrupt is active low unless we're configured as
 233          * active-high polarity, push-pull type.
 234          */
 235         level = !level;
 236     }
 237     qemu_set_irq(s->irq, level);
 238 }
 239
 240 static void lan9118_mac_changed(lan9118_state *s)
 241 {
 242     qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
 243 }
 244
 245 static void lan9118_reload_eeprom(lan9118_state *s)
 246 {
 247     int i;
 248     if (s->eeprom[0] != 0xa5) {
 249         s->e2p_cmd &= ~0x10;
 250         DPRINTF("MACADDR load failed\n");
 251         return;
 252     }
 253     for (i = 0; i < 6; i++) {
 254         s->conf.macaddr.a[i] = s->eeprom[i + 1];
 255     }
 256     s->e2p_cmd |= 0x10;
 257     DPRINTF("MACADDR loaded from eeprom\n");
 258     lan9118_mac_changed(s);
 259 }
 260
 261 static void phy_update_irq(lan9118_state *s)
 262 {
 263     if (s->phy_int & s->phy_int_mask) {
 264         s->int_sts |= PHY_INT;
 265     } else {
 266         s->int_sts &= ~PHY_INT;
 267     }
 268     lan9118_update(s);
 269 }
 270
 271 static void phy_update_link(lan9118_state *s)
 272 {
 273     /* Autonegotiation status mirrors link status.  */
 274     if (s->nic->nc.link_down) {
 275         s->phy_status &= ~0x0024;
 276         s->phy_int |= PHY_INT_DOWN;
 277     } else {
 278         s->phy_status |= 0x0024;
 279         s->phy_int |= PHY_INT_ENERGYON;
 280         s->phy_int |= PHY_INT_AUTONEG_COMPLETE;
 281     }
 282     phy_update_irq(s);
 283 }
 284
 285 static void lan9118_set_link(VLANClientState *nc)
 286 {
 287     phy_update_link(DO_UPCAST(NICState, nc, nc)->opaque);
 288 }
 289
 290 static void phy_reset(lan9118_state *s)
 291 {
 292     s->phy_status = 0x7809;
 293     s->phy_control = 0x3000;
 294     s->phy_advertise = 0x01e1;
 295     s->phy_int_mask = 0;
 296     s->phy_int = 0;
 297     phy_update_link(s);
 298 }
 299
 300 static void lan9118_reset(DeviceState *d)
 301 {
 302     lan9118_state *s = FROM_SYSBUS(lan9118_state, sysbus_from_qdev(d));
 303     s->irq_cfg &= (IRQ_TYPE | IRQ_POL);
 304     s->int_sts = 0;
 305     s->int_en = 0;
 306     s->fifo_int = 0x48000000;
 307     s->rx_cfg = 0;
 308     s->tx_cfg = 0;
 309     s->hw_cfg = 0x00050000;
 310     s->pmt_ctrl &= 0x45;
 311     s->gpio_cfg = 0;
 312     s->txp->fifo_used = 0;
 313     s->txp->state = TX_IDLE;
 314     s->txp->cmd_a = 0xffffffffu;
 315     s->txp->cmd_b = 0xffffffffu;
 316     s->txp->len = 0;
 317     s->txp->fifo_used = 0;
 318     s->tx_fifo_size = 4608;
 319     s->tx_status_fifo_used = 0;
 320     s->rx_status_fifo_size = 704;
 321     s->rx_fifo_size = 2640;
 322     s->rx_fifo_used = 0;
 323     s->rx_status_fifo_size = 176;
 324     s->rx_status_fifo_used = 0;
 325     s->rxp_offset = 0;
 326     s->rxp_size = 0;
 327     s->rxp_pad = 0;
 328     s->rx_packet_size_tail = s->rx_packet_size_head;
 329     s->rx_packet_size[s->rx_packet_size_head] = 0;
 330     s->mac_cmd = 0;
 331     s->mac_data = 0;
 332     s->afc_cfg = 0;
 333     s->e2p_cmd = 0;
 334     s->e2p_data = 0;
 335     s->free_timer_start = qemu_get_clock_ns(vm_clock) / 40;
 336
 337     ptimer_stop(s->timer);
 338     ptimer_set_count(s->timer, 0xffff);
 339     s->gpt_cfg = 0xffff;
 340
 341     s->mac_cr = MAC_CR_PRMS;
 342     s->mac_hashh = 0;
 343     s->mac_hashl = 0;
 344     s->mac_mii_acc = 0;
 345     s->mac_mii_data = 0;
 346     s->mac_flow = 0;
 347
 348     phy_reset(s);
 349
 350     s->eeprom_writable = 0;
 351     lan9118_reload_eeprom(s);
 352 }
 353
 354 static int lan9118_can_receive(VLANClientState *nc)
 355 {
 356     return 1;
 357 }
 358
 359 static void rx_fifo_push(lan9118_state *s, uint32_t val)
 360 {
 361     int fifo_pos;
 362     fifo_pos = s->rx_fifo_head + s->rx_fifo_used;
 363     if (fifo_pos >= s->rx_fifo_size)
 364       fifo_pos -= s->rx_fifo_size;
 365     s->rx_fifo[fifo_pos] = val;
 366     s->rx_fifo_used++;
 367 }
 368
 369 /* Return nonzero if the packet is accepted by the filter.  */
 370 static int lan9118_filter(lan9118_state *s, const uint8_t *addr)
 371 {
 372     int multicast;
 373     uint32_t hash;
 374
 375     if (s->mac_cr & MAC_CR_PRMS) {
 376         return 1;
 377     }
 378     if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
 379         addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
 380         return (s->mac_cr & MAC_CR_BCAST) == 0;
 381     }
 382
 383     multicast = addr[0] & 1;
 384     if (multicast &&s->mac_cr & MAC_CR_MCPAS) {
 385         return 1;
 386     }
 387     if (multicast ? (s->mac_cr & MAC_CR_HPFILT) == 0
 388                   : (s->mac_cr & MAC_CR_HO) == 0) {
 389         /* Exact matching.  */
 390         hash = memcmp(addr, s->conf.macaddr.a, 6);
 391         if (s->mac_cr & MAC_CR_INVFILT) {
 392             return hash != 0;
 393         } else {
 394             return hash == 0;
 395         }
 396     } else {
 397         /* Hash matching  */
 398         hash = (crc32(~0, addr, 6) >> 26);
 399         if (hash & 0x20) {
 400             return (s->mac_hashh >> (hash & 0x1f)) & 1;
 401         } else {
 402             return (s->mac_hashl >> (hash & 0x1f)) & 1;
 403         }
 404     }
 405 }
 406
 407 static ssize_t lan9118_receive(VLANClientState *nc, const uint8_t *buf,
 408                                size_t size)
 409 {
 410     lan9118_state *s = DO_UPCAST(NICState, nc, nc)->opaque;
 411     int fifo_len;
 412     int offset;
 413     int src_pos;
 414     int n;
 415     int filter;
 416     uint32_t val;
 417     uint32_t crc;
 418     uint32_t status;
 419
 420     if ((s->mac_cr & MAC_CR_RXEN) == 0) {
 421         return -1;
 422     }
 423
 424     if (size >= 2048 || size < 14) {
 425         return -1;
 426     }
 427
 428     /* TODO: Implement FIFO overflow notification.  */
 429     if (s->rx_status_fifo_used == s->rx_status_fifo_size) {
 430         return -1;
 431     }
 432
 433     filter = lan9118_filter(s, buf);
 434     if (!filter && (s->mac_cr & MAC_CR_RXALL) == 0) {
 435         return size;
 436     }
 437
 438     offset = (s->rx_cfg >> 8) & 0x1f;
 439     n = offset & 3;
 440     fifo_len = (size + n + 3) >> 2;
 441     /* Add a word for the CRC.  */
 442     fifo_len++;
 443     if (s->rx_fifo_size - s->rx_fifo_used < fifo_len) {
 444         return -1;
 445     }
 446
 447     DPRINTF("Got packet len:%d fifo:%d filter:%s\n",
 448             (int)size, fifo_len, filter ? "pass" : "fail");
 449     val = 0;
 450     crc = bswap32(crc32(~0, buf, size));
 451     for (src_pos = 0; src_pos < size; src_pos++) {
 452         val = (val >> 8) | ((uint32_t)buf[src_pos] << 24);
 453         n++;
 454         if (n == 4) {
 455             n = 0;
 456             rx_fifo_push(s, val);
 457             val = 0;
 458         }
 459     }
 460     if (n) {
 461         val >>= ((4 - n) * 8);
 462         val |= crc << (n * 8);
 463         rx_fifo_push(s, val);
 464         val = crc >> ((4 - n) * 8);
 465         rx_fifo_push(s, val);
 466     } else {
 467         rx_fifo_push(s, crc);
 468     }
 469     n = s->rx_status_fifo_head + s->rx_status_fifo_used;
 470     if (n >= s->rx_status_fifo_size) {
 471         n -= s->rx_status_fifo_size;
 472     }
 473     s->rx_packet_size[s->rx_packet_size_tail] = fifo_len;
 474     s->rx_packet_size_tail = (s->rx_packet_size_tail + 1023) & 1023;
 475     s->rx_status_fifo_used++;
 476
 477     status = (size + 4) << 16;
 478     if (buf[0] == 0xff && buf[1] == 0xff && buf[2] == 0xff &&
 479         buf[3] == 0xff && buf[4] == 0xff && buf[5] == 0xff) {
 480         status |= 0x00002000;
 481     } else if (buf[0] & 1) {
 482         status |= 0x00000400;
 483     }
 484     if (!filter) {
 485         status |= 0x40000000;
 486     }
 487     s->rx_status_fifo[n] = status;
 488
 489     if (s->rx_status_fifo_used > (s->fifo_int & 0xff)) {
 490         s->int_sts |= RSFL_INT;
 491     }
 492     lan9118_update(s);
 493
 494     return size;
 495 }
 496
 497 static uint32_t rx_fifo_pop(lan9118_state *s)
 498 {
 499     int n;
 500     uint32_t val;
 501
 502     if (s->rxp_size == 0 && s->rxp_pad == 0) {
 503         s->rxp_size = s->rx_packet_size[s->rx_packet_size_head];
 504         s->rx_packet_size[s->rx_packet_size_head] = 0;
 505         if (s->rxp_size != 0) {
 506             s->rx_packet_size_head = (s->rx_packet_size_head + 1023) & 1023;
 507             s->rxp_offset = (s->rx_cfg >> 10) & 7;
 508             n = s->rxp_offset + s->rxp_size;
 509             switch (s->rx_cfg >> 30) {
 510             case 1:
 511                 n = (-n) & 3;
 512                 break;
 513             case 2:
 514                 n = (-n) & 7;
 515                 break;
 516             default:
 517                 n = 0;
 518                 break;
 519             }
 520             s->rxp_pad = n;
 521             DPRINTF("Pop packet size:%d offset:%d pad: %d\n",
 522                     s->rxp_size, s->rxp_offset, s->rxp_pad);
 523         }
 524     }
 525     if (s->rxp_offset > 0) {
 526         s->rxp_offset--;
 527         val = 0;
 528     } else if (s->rxp_size > 0) {
 529         s->rxp_size--;
 530         val = s->rx_fifo[s->rx_fifo_head++];
 531         if (s->rx_fifo_head >= s->rx_fifo_size) {
 532             s->rx_fifo_head -= s->rx_fifo_size;
 533         }
 534         s->rx_fifo_used--;
 535     } else if (s->rxp_pad > 0) {
 536         s->rxp_pad--;
 537         val =  0;
 538     } else {
 539         DPRINTF("RX underflow\n");
 540         s->int_sts |= RXE_INT;
 541         val =  0;
 542     }
 543     lan9118_update(s);
 544     return val;
 545 }
 546
 547 static void do_tx_packet(lan9118_state *s)
 548 {
 549     int n;
 550     uint32_t status;
 551
 552     /* FIXME: Honor TX disable, and allow queueing of packets.  */
 553     if (s->phy_control & 0x4000)  {
 554         /* This assumes the receive routine doesn't touch the VLANClient.  */
 555         lan9118_receive(&s->nic->nc, s->txp->data, s->txp->len);
 556     } else {
 557         qemu_send_packet(&s->nic->nc, s->txp->data, s->txp->len);
 558     }
 559     s->txp->fifo_used = 0;
 560
 561     if (s->tx_status_fifo_used == 512) {
 562         /* Status FIFO full */
 563         return;
 564     }
 565     /* Add entry to status FIFO.  */
 566     status = s->txp->cmd_b & 0xffff0000u;
 567     DPRINTF("Sent packet tag:%04x len %d\n", status >> 16, s->txp->len);
 568     n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
 569     s->tx_status_fifo[n] = status;
 570     s->tx_status_fifo_used++;
 571     if (s->tx_status_fifo_used == 512) {
 572         s->int_sts |= TSFF_INT;
 573         /* TODO: Stop transmission.  */
 574     }
 575 }
 576
 577 static uint32_t rx_status_fifo_pop(lan9118_state *s)
 578 {
 579     uint32_t val;
 580
 581     val = s->rx_status_fifo[s->rx_status_fifo_head];
 582     if (s->rx_status_fifo_used != 0) {
 583         s->rx_status_fifo_used--;
 584         s->rx_status_fifo_head++;
 585         if (s->rx_status_fifo_head >= s->rx_status_fifo_size) {
 586             s->rx_status_fifo_head -= s->rx_status_fifo_size;
 587         }
 588         /* ??? What value should be returned when the FIFO is empty?  */
 589         DPRINTF("RX status pop 0x%08x\n", val);
 590     }
 591     return val;
 592 }
 593
 594 static uint32_t tx_status_fifo_pop(lan9118_state *s)
 595 {
 596     uint32_t val;
 597
 598     val = s->tx_status_fifo[s->tx_status_fifo_head];
 599     if (s->tx_status_fifo_used != 0) {
 600         s->tx_status_fifo_used--;
 601         s->tx_status_fifo_head = (s->tx_status_fifo_head + 1) & 511;
 602         /* ??? What value should be returned when the FIFO is empty?  */
 603     }
 604     return val;
 605 }
 606
 607 static void tx_fifo_push(lan9118_state *s, uint32_t val)
 608 {
 609     int n;
 610
 611     if (s->txp->fifo_used == s->tx_fifo_size) {
 612         s->int_sts |= TDFO_INT;
 613         return;
 614     }
 615     switch (s->txp->state) {
 616     case TX_IDLE:
 617         s->txp->cmd_a = val & 0x831f37ff;
 618         s->txp->fifo_used++;
 619         s->txp->state = TX_B;
 620         break;
 621     case TX_B:
 622         if (s->txp->cmd_a & 0x2000) {
 623             /* First segment */
 624             s->txp->cmd_b = val;
 625             s->txp->fifo_used++;
 626             s->txp->buffer_size = s->txp->cmd_a & 0x7ff;
 627             s->txp->offset = (s->txp->cmd_a >> 16) & 0x1f;
 628             /* End alignment does not include command words.  */
 629             n = (s->txp->buffer_size + s->txp->offset + 3) >> 2;
 630             switch ((n >> 24) & 3) {
 631             case 1:
 632                 n = (-n) & 3;
 633                 break;
 634             case 2:
 635                 n = (-n) & 7;
 636                 break;
 637             default:
 638                 n = 0;
 639             }
 640             s->txp->pad = n;
 641             s->txp->len = 0;
 642         }
 643         DPRINTF("Block len:%d offset:%d pad:%d cmd %08x\n",
 644                 s->txp->buffer_size, s->txp->offset, s->txp->pad,
 645                 s->txp->cmd_a);
 646         s->txp->state = TX_DATA;
 647         break;
 648     case TX_DATA:
 649         if (s->txp->offset >= 4) {
 650             s->txp->offset -= 4;
 651             break;
 652         }
 653         if (s->txp->buffer_size <= 0 && s->txp->pad != 0) {
 654             s->txp->pad--;
 655         } else {
 656             n = 4;
 657             while (s->txp->offset) {
 658                 val >>= 8;
 659                 n--;
 660                 s->txp->offset--;
 661             }
 662             /* Documentation is somewhat unclear on the ordering of bytes
 663                in FIFO words.  Empirical results show it to be little-endian.
 664                */
 665             /* TODO: FIFO overflow checking.  */
 666             while (n--) {
 667                 s->txp->data[s->txp->len] = val & 0xff;
 668                 s->txp->len++;
 669                 val >>= 8;
 670                 s->txp->buffer_size--;
 671             }
 672             s->txp->fifo_used++;
 673         }
 674         if (s->txp->buffer_size <= 0 && s->txp->pad == 0) {
 675             if (s->txp->cmd_a & 0x1000) {
 676                 do_tx_packet(s);
 677             }
 678             if (s->txp->cmd_a & 0x80000000) {
 679                 s->int_sts |= TX_IOC_INT;
 680             }
 681             s->txp->state = TX_IDLE;
 682         }
 683         break;
 684     }
 685 }
 686
 687 static uint32_t do_phy_read(lan9118_state *s, int reg)
 688 {
 689     uint32_t val;
 690
 691     switch (reg) {
 692     case 0: /* Basic Control */
 693         return s->phy_control;
 694     case 1: /* Basic Status */
 695         return s->phy_status;
 696     case 2: /* ID1 */
 697         return 0x0007;
 698     case 3: /* ID2 */
 699         return 0xc0d1;
 700     case 4: /* Auto-neg advertisment */
 701         return s->phy_advertise;
 702     case 5: /* Auto-neg Link Partner Ability */
 703         return 0x0f71;
 704     case 6: /* Auto-neg Expansion */
 705         return 1;
 706         /* TODO 17, 18, 27, 29, 30, 31 */
 707     case 29: /* Interrupt source.  */
 708         val = s->phy_int;
 709         s->phy_int = 0;
 710         phy_update_irq(s);
 711         return val;
 712     case 30: /* Interrupt mask */
 713         return s->phy_int_mask;
 714     default:
 715         BADF("PHY read reg %d\n", reg);
 716         return 0;
 717     }
 718 }
 719
 720 static void do_phy_write(lan9118_state *s, int reg, uint32_t val)
 721 {
 722     switch (reg) {
 723     case 0: /* Basic Control */
 724         if (val & 0x8000) {
 725             phy_reset(s);
 726             break;
 727         }
 728         s->phy_control = val & 0x7980;
 729         /* Complete autonegotiation immediately.  */
 730         if (val & 0x1000) {
 731             s->phy_status |= 0x0020;
 732         }
 733         break;
 734     case 4: /* Auto-neg advertisment */
 735         s->phy_advertise = (val & 0x2d7f) | 0x80;
 736         break;
 737         /* TODO 17, 18, 27, 31 */
 738     case 30: /* Interrupt mask */
 739         s->phy_int_mask = val & 0xff;
 740         phy_update_irq(s);
 741         break;
 742     default:
 743         BADF("PHY write reg %d = 0x%04x\n", reg, val);
 744     }
 745 }
 746
 747 static void do_mac_write(lan9118_state *s, int reg, uint32_t val)
 748 {
 749     switch (reg) {
 750     case MAC_CR:
 751         if ((s->mac_cr & MAC_CR_RXEN) != 0 && (val & MAC_CR_RXEN) == 0) {
 752             s->int_sts |= RXSTOP_INT;
 753         }
 754         s->mac_cr = val & ~MAC_CR_RESERVED;
 755         DPRINTF("MAC_CR: %08x\n", val);
 756         break;
 757     case MAC_ADDRH:
 758         s->conf.macaddr.a[4] = val & 0xff;
 759         s->conf.macaddr.a[5] = (val >> 8) & 0xff;
 760         lan9118_mac_changed(s);
 761         break;
 762     case MAC_ADDRL:
 763         s->conf.macaddr.a[0] = val & 0xff;
 764         s->conf.macaddr.a[1] = (val >> 8) & 0xff;
 765         s->conf.macaddr.a[2] = (val >> 16) & 0xff;
 766         s->conf.macaddr.a[3] = (val >> 24) & 0xff;
 767         lan9118_mac_changed(s);
 768         break;
 769     case MAC_HASHH:
 770         s->mac_hashh = val;
 771         break;
 772     case MAC_HASHL:
 773         s->mac_hashl = val;
 774         break;
 775     case MAC_MII_ACC:
 776         s->mac_mii_acc = val & 0xffc2;
 777         if (val & 2) {
 778             DPRINTF("PHY write %d = 0x%04x\n",
 779                     (val >> 6) & 0x1f, s->mac_mii_data);
 780             do_phy_write(s, (val >> 6) & 0x1f, s->mac_mii_data);
 781         } else {
 782             s->mac_mii_data = do_phy_read(s, (val >> 6) & 0x1f);
 783             DPRINTF("PHY read %d = 0x%04x\n",
 784                     (val >> 6) & 0x1f, s->mac_mii_data);
 785         }
 786         break;
 787     case MAC_MII_DATA:
 788         s->mac_mii_data = val & 0xffff;
 789         break;
 790     case MAC_FLOW:
 791         s->mac_flow = val & 0xffff0000;
 792         break;
 793     case MAC_VLAN1:
 794         /* Writing to this register changes a condition for
 795          * FrameTooLong bit in rx_status.  Since we do not set
 796          * FrameTooLong anyway, just ignore write to this.
 797          */
 798         break;
 799     default:
 800         hw_error("lan9118: Unimplemented MAC register write: %d = 0x%x\n",
 801                  s->mac_cmd & 0xf, val);
 802     }
 803 }
 804
 805 static uint32_t do_mac_read(lan9118_state *s, int reg)
 806 {
 807     switch (reg) {
 808     case MAC_CR:
 809         return s->mac_cr;
 810     case MAC_ADDRH:
 811         return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8);
 812     case MAC_ADDRL:
 813         return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8)
 814                | (s->conf.macaddr.a[2] << 16) | (s->conf.macaddr.a[3] << 24);
 815     case MAC_HASHH:
 816         return s->mac_hashh;
 817         break;
 818     case MAC_HASHL:
 819         return s->mac_hashl;
 820         break;
 821     case MAC_MII_ACC:
 822         return s->mac_mii_acc;
 823     case MAC_MII_DATA:
 824         return s->mac_mii_data;
 825     case MAC_FLOW:
 826         return s->mac_flow;
 827     default:
 828         hw_error("lan9118: Unimplemented MAC register read: %d\n",
 829                  s->mac_cmd & 0xf);
 830     }
 831 }
 832
 833 static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
 834 {
 835     s->e2p_cmd = (s->e2p_cmd & 0x10) | (cmd << 28) | addr;
 836     switch (cmd) {
 837     case 0:
 838         s->e2p_data = s->eeprom[addr];
 839         DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
 840         break;
 841     case 1:
 842         s->eeprom_writable = 0;
 843         DPRINTF("EEPROM Write Disable\n");
 844         break;
 845     case 2: /* EWEN */
 846         s->eeprom_writable = 1;
 847         DPRINTF("EEPROM Write Enable\n");
 848         break;
 849     case 3: /* WRITE */
 850         if (s->eeprom_writable) {
 851             s->eeprom[addr] &= s->e2p_data;
 852             DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
 853         } else {
 854             DPRINTF("EEPROM Write %d (ignored)\n", addr);
 855         }
 856         break;
 857     case 4: /* WRAL */
 858         if (s->eeprom_writable) {
 859             for (addr = 0; addr < 128; addr++) {
 860                 s->eeprom[addr] &= s->e2p_data;
 861             }
 862             DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
 863         } else {
 864             DPRINTF("EEPROM Write All (ignored)\n");
 865         }
 866     case 5: /* ERASE */
 867         if (s->eeprom_writable) {
 868             s->eeprom[addr] = 0xff;
 869             DPRINTF("EEPROM Erase %d\n", addr);
 870         } else {
 871             DPRINTF("EEPROM Erase %d (ignored)\n", addr);
 872         }
 873         break;
 874     case 6: /* ERAL */
 875         if (s->eeprom_writable) {
 876             memset(s->eeprom, 0xff, 128);
 877             DPRINTF("EEPROM Erase All\n");
 878         } else {
 879             DPRINTF("EEPROM Erase All (ignored)\n");
 880         }
 881         break;
 882     case 7: /* RELOAD */
 883         lan9118_reload_eeprom(s);
 884         break;
 885     }
 886 }
 887
 888 static void lan9118_tick(void *opaque)
 889 {
 890     lan9118_state *s = (lan9118_state *)opaque;
 891     if (s->int_en & GPT_INT) {
 892         s->int_sts |= GPT_INT;
 893     }
 894     lan9118_update(s);
 895 }
 896
 897 static void lan9118_writel(void *opaque, target_phys_addr_t offset,
 898                            uint64_t val, unsigned size)
 899 {
 900     lan9118_state *s = (lan9118_state *)opaque;
 901     offset &= 0xff;
 902
 903     //DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
 904     if (offset >= 0x20 && offset < 0x40) {
 905         /* TX FIFO */
 906         tx_fifo_push(s, val);
 907         return;
 908     }
 909     switch (offset) {
 910     case CSR_IRQ_CFG:
 911         /* TODO: Implement interrupt deassertion intervals.  */
 912         val &= (IRQ_EN | IRQ_POL | IRQ_TYPE);
 913         s->irq_cfg = (s->irq_cfg & IRQ_INT) | val;
 914         break;
 915     case CSR_INT_STS:
 916         s->int_sts &= ~val;
 917         break;
 918     case CSR_INT_EN:
 919         s->int_en = val & ~RESERVED_INT;
 920         s->int_sts |= val & SW_INT;
 921         break;
 922     case CSR_FIFO_INT:
 923         DPRINTF("FIFO INT levels %08x\n", val);
 924         s->fifo_int = val;
 925         break;
 926     case CSR_RX_CFG:
 927         if (val & 0x8000) {
 928             /* RX_DUMP */
 929             s->rx_fifo_used = 0;
 930             s->rx_status_fifo_used = 0;
 931             s->rx_packet_size_tail = s->rx_packet_size_head;
 932             s->rx_packet_size[s->rx_packet_size_head] = 0;
 933         }
 934         s->rx_cfg = val & 0xcfff1ff0;
 935         break;
 936     case CSR_TX_CFG:
 937         if (val & 0x8000) {
 938             s->tx_status_fifo_used = 0;
 939         }
 940         if (val & 0x4000) {
 941             s->txp->state = TX_IDLE;
 942             s->txp->fifo_used = 0;
 943             s->txp->cmd_a = 0xffffffff;
 944         }
 945         s->tx_cfg = val & 6;
 946         break;
 947     case CSR_HW_CFG:
 948         if (val & 1) {
 949             /* SRST */
 950             lan9118_reset(&s->busdev.qdev);
 951         } else {
 952             s->hw_cfg = val & 0x003f300;
 953         }
 954         break;
 955     case CSR_RX_DP_CTRL:
 956         if (val & 0x80000000) {
 957             /* Skip forward to next packet.  */
 958             s->rxp_pad = 0;
 959             s->rxp_offset = 0;
 960             if (s->rxp_size == 0) {
 961                 /* Pop a word to start the next packet.  */
 962                 rx_fifo_pop(s);
 963                 s->rxp_pad = 0;
 964                 s->rxp_offset = 0;
 965             }
 966             s->rx_fifo_head += s->rxp_size;
 967             if (s->rx_fifo_head >= s->rx_fifo_size) {
 968                 s->rx_fifo_head -= s->rx_fifo_size;
 969             }
 970         }
 971         break;
 972     case CSR_PMT_CTRL:
 973         if (val & 0x400) {
 974             phy_reset(s);
 975         }
 976         s->pmt_ctrl &= ~0x34e;
 977         s->pmt_ctrl |= (val & 0x34e);
 978         break;
 979     case CSR_GPIO_CFG:
 980         /* Probably just enabling LEDs.  */
 981         s->gpio_cfg = val & 0x7777071f;
 982         break;
 983     case CSR_GPT_CFG:
 984         if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
 985             if (val & GPT_TIMER_EN) {
 986                 ptimer_set_count(s->timer, val & 0xffff);
 987                 ptimer_run(s->timer, 0);
 988             } else {
 989                 ptimer_stop(s->timer);
 990                 ptimer_set_count(s->timer, 0xffff);
 991             }
 992         }
 993         s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
 994         break;
 995     case CSR_WORD_SWAP:
 996         /* Ignored because we're in 32-bit mode.  */
 997         s->word_swap = val;
 998         break;
 999     case CSR_MAC_CSR_CMD:
1000         s->mac_cmd = val & 0x4000000f;
1001         if (val & 0x80000000) {
1002             if (val & 0x40000000) {
1003                 s->mac_data = do_mac_read(s, val & 0xf);
1004                 DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data);
1005             } else {
1006                 DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data);
1007                 do_mac_write(s, val & 0xf, s->mac_data);
1008             }
1009         }
1010         break;
1011     case CSR_MAC_CSR_DATA:
1012         s->mac_data = val;
1013         break;
1014     case CSR_AFC_CFG:
1015         s->afc_cfg = val & 0x00ffffff;
1016         break;
1017     case CSR_E2P_CMD:
1018         lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0x7f);
1019         break;
1020     case CSR_E2P_DATA:
1021         s->e2p_data = val & 0xff;
1022         break;
1023
1024     default:
1025         hw_error("lan9118_write: Bad reg 0x%x = %x\n", (int)offset, (int)val);
1026         break;
1027     }
1028     lan9118_update(s);
1029 }
1030
1031 static uint64_t lan9118_readl(void *opaque, target_phys_addr_t offset,
1032                               unsigned size)
1033 {
1034     lan9118_state *s = (lan9118_state *)opaque;
1035
1036     //DPRINTF("Read reg 0x%02x\n", (int)offset);
1037     if (offset < 0x20) {
1038         /* RX FIFO */
1039         return rx_fifo_pop(s);
1040     }
1041     switch (offset) {
1042     case 0x40:
1043         return rx_status_fifo_pop(s);
1044     case 0x44:
1045         return s->rx_status_fifo[s->tx_status_fifo_head];
1046     case 0x48:
1047         return tx_status_fifo_pop(s);
1048     case 0x4c:
1049         return s->tx_status_fifo[s->tx_status_fifo_head];
1050     case CSR_ID_REV:
1051         return 0x01180001;
1052     case CSR_IRQ_CFG:
1053         return s->irq_cfg;
1054     case CSR_INT_STS:
1055         return s->int_sts;
1056     case CSR_INT_EN:
1057         return s->int_en;
1058     case CSR_BYTE_TEST:
1059         return 0x87654321;
1060     case CSR_FIFO_INT:
1061         return s->fifo_int;
1062     case CSR_RX_CFG:
1063         return s->rx_cfg;
1064     case CSR_TX_CFG:
1065         return s->tx_cfg;
1066     case CSR_HW_CFG:
1067         return s->hw_cfg | 0x4;
1068     case CSR_RX_DP_CTRL:
1069         return 0;
1070     case CSR_RX_FIFO_INF:
1071         return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2);
1072     case CSR_TX_FIFO_INF:
1073         return (s->tx_status_fifo_used << 16)
1074                | (s->tx_fifo_size - s->txp->fifo_used);
1075     case CSR_PMT_CTRL:
1076         return s->pmt_ctrl;
1077     case CSR_GPIO_CFG:
1078         return s->gpio_cfg;
1079     case CSR_GPT_CFG:
1080         return s->gpt_cfg;
1081     case CSR_GPT_CNT:
1082         return ptimer_get_count(s->timer);
1083     case CSR_WORD_SWAP:
1084         return s->word_swap;
1085     case CSR_FREE_RUN:
1086         return (qemu_get_clock_ns(vm_clock) / 40) - s->free_timer_start;
1087     case CSR_RX_DROP:
1088         /* TODO: Implement dropped frames counter.  */
1089         return 0;
1090     case CSR_MAC_CSR_CMD:
1091         return s->mac_cmd;
1092     case CSR_MAC_CSR_DATA:
1093         return s->mac_data;
1094     case CSR_AFC_CFG:
1095         return s->afc_cfg;
1096     case CSR_E2P_CMD:
1097         return s->e2p_cmd;
1098     case CSR_E2P_DATA:
1099         return s->e2p_data;
1100     }
1101     hw_error("lan9118_read: Bad reg 0x%x\n", (int)offset);
1102     return 0;
1103 }
1104
1105 static const MemoryRegionOps lan9118_mem_ops = {
1106     .read = lan9118_readl,
1107     .write = lan9118_writel,
1108     .endianness = DEVICE_NATIVE_ENDIAN,
1109 };
1110
1111 static void lan9118_cleanup(VLANClientState *nc)
1112 {
1113     lan9118_state *s = DO_UPCAST(NICState, nc, nc)->opaque;
1114
1115     s->nic = NULL;
1116 }
1117
1118 static NetClientInfo net_lan9118_info = {
1119     .type = NET_CLIENT_TYPE_NIC,
1120     .size = sizeof(NICState),
1121     .can_receive = lan9118_can_receive,
1122     .receive = lan9118_receive,
1123     .cleanup = lan9118_cleanup,
1124     .link_status_changed = lan9118_set_link,
1125 };
1126
1127 static int lan9118_init1(SysBusDevice *dev)
1128 {
1129     lan9118_state *s = FROM_SYSBUS(lan9118_state, dev);
1130     QEMUBH *bh;
1131     int i;
1132
1133     memory_region_init_io(&s->mmio, &lan9118_mem_ops, s, "lan9118-mmio", 0x100);
1134     sysbus_init_mmio_region(dev, &s->mmio);
1135     sysbus_init_irq(dev, &s->irq);
1136     qemu_macaddr_default_if_unset(&s->conf.macaddr);
1137
1138     s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1139                           dev->qdev.info->name, dev->qdev.id, s);
1140     qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
1141     s->eeprom[0] = 0xa5;
1142     for (i = 0; i < 6; i++) {
1143         s->eeprom[i + 1] = s->conf.macaddr.a[i];
1144     }
1145     s->pmt_ctrl = 1;
1146     s->txp = &s->tx_packet;
1147
1148     bh = qemu_bh_new(lan9118_tick, s);
1149     s->timer = ptimer_init(bh);
1150     ptimer_set_freq(s->timer, 10000);
1151     ptimer_set_limit(s->timer, 0xffff, 1);
1152
1153     /* ??? Save/restore.  */
1154     return 0;
1155 }
1156
1157 static SysBusDeviceInfo lan9118_info = {
1158     .init = lan9118_init1,
1159     .qdev.name  = "lan9118",
1160     .qdev.size  = sizeof(lan9118_state),
1161     .qdev.reset = lan9118_reset,
1162     .qdev.props = (Property[]) {
1163         DEFINE_NIC_PROPERTIES(lan9118_state, conf),
1164         DEFINE_PROP_END_OF_LIST(),
1165     }
1166 };
1167
1168 static void lan9118_register_devices(void)
1169 {
1170     sysbus_register_withprop(&lan9118_info);
1171 }
1172
1173 /* Legacy helper function.  Should go away when machine config files are
1174    implemented.  */
1175 void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1176 {
1177     DeviceState *dev;
1178     SysBusDevice *s;
1179
1180     qemu_check_nic_model(nd, "lan9118");
1181     dev = qdev_create(NULL, "lan9118");
1182     qdev_set_nic_properties(dev, nd);
1183     qdev_init_nofail(dev);
1184     s = sysbus_from_qdev(dev);
1185     sysbus_mmio_map(s, 0, base);
1186     sysbus_connect_irq(s, 0, irq);
1187 }
1188
1189 device_init(lan9118_register_devices)