hw/net/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  * Contributions after 2012-01-13 are licensed under the terms of the
  10  * GNU GPL, version 2 or (at your option) any later version.
  11  */
  12
  13 #include "hw/sysbus.h"
  14 #include "net/net.h"
  15 #include "hw/devices.h"
  16 #include "sysemu/sysemu.h"
  17 #include "hw/ptimer.h"
  18 /* For crc32 */
  19 #include <zlib.h>
  20
  21 //#define DEBUG_LAN9118
  22
  23 #ifdef DEBUG_LAN9118
  24 #define DPRINTF(fmt, ...) \
  25 do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  26 #define BADF(fmt, ...) \
  27 do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  28 #else
  29 #define DPRINTF(fmt, ...) do {} while(0)
  30 #define BADF(fmt, ...) \
  31 do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  32 #endif
  33
  34 #define CSR_ID_REV      0x50
  35 #define CSR_IRQ_CFG     0x54
  36 #define CSR_INT_STS     0x58
  37 #define CSR_INT_EN      0x5c
  38 #define CSR_BYTE_TEST   0x64
  39 #define CSR_FIFO_INT    0x68
  40 #define CSR_RX_CFG      0x6c
  41 #define CSR_TX_CFG      0x70
  42 #define CSR_HW_CFG      0x74
  43 #define CSR_RX_DP_CTRL  0x78
  44 #define CSR_RX_FIFO_INF 0x7c
  45 #define CSR_TX_FIFO_INF 0x80
  46 #define CSR_PMT_CTRL    0x84
  47 #define CSR_GPIO_CFG    0x88
  48 #define CSR_GPT_CFG     0x8c
  49 #define CSR_GPT_CNT     0x90
  50 #define CSR_WORD_SWAP   0x98
  51 #define CSR_FREE_RUN    0x9c
  52 #define CSR_RX_DROP     0xa0
  53 #define CSR_MAC_CSR_CMD 0xa4
  54 #define CSR_MAC_CSR_DATA 0xa8
  55 #define CSR_AFC_CFG     0xac
  56 #define CSR_E2P_CMD     0xb0
  57 #define CSR_E2P_DATA    0xb4
  58
  59 /* IRQ_CFG */
  60 #define IRQ_INT         0x00001000
  61 #define IRQ_EN          0x00000100
  62 #define IRQ_POL         0x00000010
  63 #define IRQ_TYPE        0x00000001
  64
  65 /* INT_STS/INT_EN */
  66 #define SW_INT          0x80000000
  67 #define TXSTOP_INT      0x02000000
  68 #define RXSTOP_INT      0x01000000
  69 #define RXDFH_INT       0x00800000
  70 #define TX_IOC_INT      0x00200000
  71 #define RXD_INT         0x00100000
  72 #define GPT_INT         0x00080000
  73 #define PHY_INT         0x00040000
  74 #define PME_INT         0x00020000
  75 #define TXSO_INT        0x00010000
  76 #define RWT_INT         0x00008000
  77 #define RXE_INT         0x00004000
  78 #define TXE_INT         0x00002000
  79 #define TDFU_INT        0x00000800
  80 #define TDFO_INT        0x00000400
  81 #define TDFA_INT        0x00000200
  82 #define TSFF_INT        0x00000100
  83 #define TSFL_INT        0x00000080
  84 #define RXDF_INT        0x00000040
  85 #define RDFL_INT        0x00000020
  86 #define RSFF_INT        0x00000010
  87 #define RSFL_INT        0x00000008
  88 #define GPIO2_INT       0x00000004
  89 #define GPIO1_INT       0x00000002
  90 #define GPIO0_INT       0x00000001
  91 #define RESERVED_INT    0x7c001000
  92
  93 #define MAC_CR          1
  94 #define MAC_ADDRH       2
  95 #define MAC_ADDRL       3
  96 #define MAC_HASHH       4
  97 #define MAC_HASHL       5
  98 #define MAC_MII_ACC     6
  99 #define MAC_MII_DATA    7
 100 #define MAC_FLOW        8
 101 #define MAC_VLAN1       9 /* TODO */
 102 #define MAC_VLAN2       10 /* TODO */
 103 #define MAC_WUFF        11 /* TODO */
 104 #define MAC_WUCSR       12 /* TODO */
 105
 106 #define MAC_CR_RXALL    0x80000000
 107 #define MAC_CR_RCVOWN   0x00800000
 108 #define MAC_CR_LOOPBK   0x00200000
 109 #define MAC_CR_FDPX     0x00100000
 110 #define MAC_CR_MCPAS    0x00080000
 111 #define MAC_CR_PRMS     0x00040000
 112 #define MAC_CR_INVFILT  0x00020000
 113 #define MAC_CR_PASSBAD  0x00010000
 114 #define MAC_CR_HO       0x00008000
 115 #define MAC_CR_HPFILT   0x00002000
 116 #define MAC_CR_LCOLL    0x00001000
 117 #define MAC_CR_BCAST    0x00000800
 118 #define MAC_CR_DISRTY   0x00000400
 119 #define MAC_CR_PADSTR   0x00000100
 120 #define MAC_CR_BOLMT    0x000000c0
 121 #define MAC_CR_DFCHK    0x00000020
 122 #define MAC_CR_TXEN     0x00000008
 123 #define MAC_CR_RXEN     0x00000004
 124 #define MAC_CR_RESERVED 0x7f404213
 125
 126 #define PHY_INT_ENERGYON            0x80
 127 #define PHY_INT_AUTONEG_COMPLETE    0x40
 128 #define PHY_INT_FAULT               0x20
 129 #define PHY_INT_DOWN                0x10
 130 #define PHY_INT_AUTONEG_LP          0x08
 131 #define PHY_INT_PARFAULT            0x04
 132 #define PHY_INT_AUTONEG_PAGE        0x02
 133
 134 #define GPT_TIMER_EN    0x20000000
 135
 136 enum tx_state {
 137     TX_IDLE,
 138     TX_B,
 139     TX_DATA
 140 };
 141
 142 typedef struct {
 143     /* state is a tx_state but we can't put enums in VMStateDescriptions. */
 144     uint32_t state;
 145     uint32_t cmd_a;
 146     uint32_t cmd_b;
 147     int32_t buffer_size;
 148     int32_t offset;
 149     int32_t pad;
 150     int32_t fifo_used;
 151     int32_t len;
 152     uint8_t data[2048];
 153 } LAN9118Packet;
 154
 155 static const VMStateDescription vmstate_lan9118_packet = {
 156     .name = "lan9118_packet",
 157     .version_id = 1,
 158     .minimum_version_id = 1,
 159     .fields = (VMStateField[]) {
 160         VMSTATE_UINT32(state, LAN9118Packet),
 161         VMSTATE_UINT32(cmd_a, LAN9118Packet),
 162         VMSTATE_UINT32(cmd_b, LAN9118Packet),
 163         VMSTATE_INT32(buffer_size, LAN9118Packet),
 164         VMSTATE_INT32(offset, LAN9118Packet),
 165         VMSTATE_INT32(pad, LAN9118Packet),
 166         VMSTATE_INT32(fifo_used, LAN9118Packet),
 167         VMSTATE_INT32(len, LAN9118Packet),
 168         VMSTATE_UINT8_ARRAY(data, LAN9118Packet, 2048),
 169         VMSTATE_END_OF_LIST()
 170     }
 171 };
 172
 173 #define TYPE_LAN9118 "lan9118"
 174 #define LAN9118(obj) OBJECT_CHECK(lan9118_state, (obj), TYPE_LAN9118)
 175
 176 typedef struct {
 177     SysBusDevice parent_obj;
 178
 179     NICState *nic;
 180     NICConf conf;
 181     qemu_irq irq;
 182     MemoryRegion mmio;
 183     ptimer_state *timer;
 184
 185     uint32_t irq_cfg;
 186     uint32_t int_sts;
 187     uint32_t int_en;
 188     uint32_t fifo_int;
 189     uint32_t rx_cfg;
 190     uint32_t tx_cfg;
 191     uint32_t hw_cfg;
 192     uint32_t pmt_ctrl;
 193     uint32_t gpio_cfg;
 194     uint32_t gpt_cfg;
 195     uint32_t word_swap;
 196     uint32_t free_timer_start;
 197     uint32_t mac_cmd;
 198     uint32_t mac_data;
 199     uint32_t afc_cfg;
 200     uint32_t e2p_cmd;
 201     uint32_t e2p_data;
 202
 203     uint32_t mac_cr;
 204     uint32_t mac_hashh;
 205     uint32_t mac_hashl;
 206     uint32_t mac_mii_acc;
 207     uint32_t mac_mii_data;
 208     uint32_t mac_flow;
 209
 210     uint32_t phy_status;
 211     uint32_t phy_control;
 212     uint32_t phy_advertise;
 213     uint32_t phy_int;
 214     uint32_t phy_int_mask;
 215
 216     int32_t eeprom_writable;
 217     uint8_t eeprom[128];
 218
 219     int32_t tx_fifo_size;
 220     LAN9118Packet *txp;
 221     LAN9118Packet tx_packet;
 222
 223     int32_t tx_status_fifo_used;
 224     int32_t tx_status_fifo_head;
 225     uint32_t tx_status_fifo[512];
 226
 227     int32_t rx_status_fifo_size;
 228     int32_t rx_status_fifo_used;
 229     int32_t rx_status_fifo_head;
 230     uint32_t rx_status_fifo[896];
 231     int32_t rx_fifo_size;
 232     int32_t rx_fifo_used;
 233     int32_t rx_fifo_head;
 234     uint32_t rx_fifo[3360];
 235     int32_t rx_packet_size_head;
 236     int32_t rx_packet_size_tail;
 237     int32_t rx_packet_size[1024];
 238
 239     int32_t rxp_offset;
 240     int32_t rxp_size;
 241     int32_t rxp_pad;
 242
 243     uint32_t write_word_prev_offset;
 244     uint32_t write_word_n;
 245     uint16_t write_word_l;
 246     uint16_t write_word_h;
 247     uint32_t read_word_prev_offset;
 248     uint32_t read_word_n;
 249     uint32_t read_long;
 250
 251     uint32_t mode_16bit;
 252 } lan9118_state;
 253
 254 static const VMStateDescription vmstate_lan9118 = {
 255     .name = "lan9118",
 256     .version_id = 2,
 257     .minimum_version_id = 1,
 258     .fields = (VMStateField[]) {
 259         VMSTATE_PTIMER(timer, lan9118_state),
 260         VMSTATE_UINT32(irq_cfg, lan9118_state),
 261         VMSTATE_UINT32(int_sts, lan9118_state),
 262         VMSTATE_UINT32(int_en, lan9118_state),
 263         VMSTATE_UINT32(fifo_int, lan9118_state),
 264         VMSTATE_UINT32(rx_cfg, lan9118_state),
 265         VMSTATE_UINT32(tx_cfg, lan9118_state),
 266         VMSTATE_UINT32(hw_cfg, lan9118_state),
 267         VMSTATE_UINT32(pmt_ctrl, lan9118_state),
 268         VMSTATE_UINT32(gpio_cfg, lan9118_state),
 269         VMSTATE_UINT32(gpt_cfg, lan9118_state),
 270         VMSTATE_UINT32(word_swap, lan9118_state),
 271         VMSTATE_UINT32(free_timer_start, lan9118_state),
 272         VMSTATE_UINT32(mac_cmd, lan9118_state),
 273         VMSTATE_UINT32(mac_data, lan9118_state),
 274         VMSTATE_UINT32(afc_cfg, lan9118_state),
 275         VMSTATE_UINT32(e2p_cmd, lan9118_state),
 276         VMSTATE_UINT32(e2p_data, lan9118_state),
 277         VMSTATE_UINT32(mac_cr, lan9118_state),
 278         VMSTATE_UINT32(mac_hashh, lan9118_state),
 279         VMSTATE_UINT32(mac_hashl, lan9118_state),
 280         VMSTATE_UINT32(mac_mii_acc, lan9118_state),
 281         VMSTATE_UINT32(mac_mii_data, lan9118_state),
 282         VMSTATE_UINT32(mac_flow, lan9118_state),
 283         VMSTATE_UINT32(phy_status, lan9118_state),
 284         VMSTATE_UINT32(phy_control, lan9118_state),
 285         VMSTATE_UINT32(phy_advertise, lan9118_state),
 286         VMSTATE_UINT32(phy_int, lan9118_state),
 287         VMSTATE_UINT32(phy_int_mask, lan9118_state),
 288         VMSTATE_INT32(eeprom_writable, lan9118_state),
 289         VMSTATE_UINT8_ARRAY(eeprom, lan9118_state, 128),
 290         VMSTATE_INT32(tx_fifo_size, lan9118_state),
 291         /* txp always points at tx_packet so need not be saved */
 292         VMSTATE_STRUCT(tx_packet, lan9118_state, 0,
 293                        vmstate_lan9118_packet, LAN9118Packet),
 294         VMSTATE_INT32(tx_status_fifo_used, lan9118_state),
 295         VMSTATE_INT32(tx_status_fifo_head, lan9118_state),
 296         VMSTATE_UINT32_ARRAY(tx_status_fifo, lan9118_state, 512),
 297         VMSTATE_INT32(rx_status_fifo_size, lan9118_state),
 298         VMSTATE_INT32(rx_status_fifo_used, lan9118_state),
 299         VMSTATE_INT32(rx_status_fifo_head, lan9118_state),
 300         VMSTATE_UINT32_ARRAY(rx_status_fifo, lan9118_state, 896),
 301         VMSTATE_INT32(rx_fifo_size, lan9118_state),
 302         VMSTATE_INT32(rx_fifo_used, lan9118_state),
 303         VMSTATE_INT32(rx_fifo_head, lan9118_state),
 304         VMSTATE_UINT32_ARRAY(rx_fifo, lan9118_state, 3360),
 305         VMSTATE_INT32(rx_packet_size_head, lan9118_state),
 306         VMSTATE_INT32(rx_packet_size_tail, lan9118_state),
 307         VMSTATE_INT32_ARRAY(rx_packet_size, lan9118_state, 1024),
 308         VMSTATE_INT32(rxp_offset, lan9118_state),
 309         VMSTATE_INT32(rxp_size, lan9118_state),
 310         VMSTATE_INT32(rxp_pad, lan9118_state),
 311         VMSTATE_UINT32_V(write_word_prev_offset, lan9118_state, 2),
 312         VMSTATE_UINT32_V(write_word_n, lan9118_state, 2),
 313         VMSTATE_UINT16_V(write_word_l, lan9118_state, 2),
 314         VMSTATE_UINT16_V(write_word_h, lan9118_state, 2),
 315         VMSTATE_UINT32_V(read_word_prev_offset, lan9118_state, 2),
 316         VMSTATE_UINT32_V(read_word_n, lan9118_state, 2),
 317         VMSTATE_UINT32_V(read_long, lan9118_state, 2),
 318         VMSTATE_UINT32_V(mode_16bit, lan9118_state, 2),
 319         VMSTATE_END_OF_LIST()
 320     }
 321 };
 322
 323 static void lan9118_update(lan9118_state *s)
 324 {
 325     int level;
 326
 327     /* TODO: Implement FIFO level IRQs.  */
 328     level = (s->int_sts & s->int_en) != 0;
 329     if (level) {
 330         s->irq_cfg |= IRQ_INT;
 331     } else {
 332         s->irq_cfg &= ~IRQ_INT;
 333     }
 334     if ((s->irq_cfg & IRQ_EN) == 0) {
 335         level = 0;
 336     }
 337     if ((s->irq_cfg & (IRQ_TYPE | IRQ_POL)) != (IRQ_TYPE | IRQ_POL)) {
 338         /* Interrupt is active low unless we're configured as
 339          * active-high polarity, push-pull type.
 340          */
 341         level = !level;
 342     }
 343     qemu_set_irq(s->irq, level);
 344 }
 345
 346 static void lan9118_mac_changed(lan9118_state *s)
 347 {
 348     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 349 }
 350
 351 static void lan9118_reload_eeprom(lan9118_state *s)
 352 {
 353     int i;
 354     if (s->eeprom[0] != 0xa5) {
 355         s->e2p_cmd &= ~0x10;
 356         DPRINTF("MACADDR load failed\n");
 357         return;
 358     }
 359     for (i = 0; i < 6; i++) {
 360         s->conf.macaddr.a[i] = s->eeprom[i + 1];
 361     }
 362     s->e2p_cmd |= 0x10;
 363     DPRINTF("MACADDR loaded from eeprom\n");
 364     lan9118_mac_changed(s);
 365 }
 366
 367 static void phy_update_irq(lan9118_state *s)
 368 {
 369     if (s->phy_int & s->phy_int_mask) {
 370         s->int_sts |= PHY_INT;
 371     } else {
 372         s->int_sts &= ~PHY_INT;
 373     }
 374     lan9118_update(s);
 375 }
 376
 377 static void phy_update_link(lan9118_state *s)
 378 {
 379     /* Autonegotiation status mirrors link status.  */
 380     if (qemu_get_queue(s->nic)->link_down) {
 381         s->phy_status &= ~0x0024;
 382         s->phy_int |= PHY_INT_DOWN;
 383     } else {
 384         s->phy_status |= 0x0024;
 385         s->phy_int |= PHY_INT_ENERGYON;
 386         s->phy_int |= PHY_INT_AUTONEG_COMPLETE;
 387     }
 388     phy_update_irq(s);
 389 }
 390
 391 static void lan9118_set_link(NetClientState *nc)
 392 {
 393     phy_update_link(qemu_get_nic_opaque(nc));
 394 }
 395
 396 static void phy_reset(lan9118_state *s)
 397 {
 398     s->phy_status = 0x7809;
 399     s->phy_control = 0x3000;
 400     s->phy_advertise = 0x01e1;
 401     s->phy_int_mask = 0;
 402     s->phy_int = 0;
 403     phy_update_link(s);
 404 }
 405
 406 static void lan9118_reset(DeviceState *d)
 407 {
 408     lan9118_state *s = LAN9118(d);
 409
 410     s->irq_cfg &= (IRQ_TYPE | IRQ_POL);
 411     s->int_sts = 0;
 412     s->int_en = 0;
 413     s->fifo_int = 0x48000000;
 414     s->rx_cfg = 0;
 415     s->tx_cfg = 0;
 416     s->hw_cfg = s->mode_16bit ? 0x00050000 : 0x00050004;
 417     s->pmt_ctrl &= 0x45;
 418     s->gpio_cfg = 0;
 419     s->txp->fifo_used = 0;
 420     s->txp->state = TX_IDLE;
 421     s->txp->cmd_a = 0xffffffffu;
 422     s->txp->cmd_b = 0xffffffffu;
 423     s->txp->len = 0;
 424     s->txp->fifo_used = 0;
 425     s->tx_fifo_size = 4608;
 426     s->tx_status_fifo_used = 0;
 427     s->rx_status_fifo_size = 704;
 428     s->rx_fifo_size = 2640;
 429     s->rx_fifo_used = 0;
 430     s->rx_status_fifo_size = 176;
 431     s->rx_status_fifo_used = 0;
 432     s->rxp_offset = 0;
 433     s->rxp_size = 0;
 434     s->rxp_pad = 0;
 435     s->rx_packet_size_tail = s->rx_packet_size_head;
 436     s->rx_packet_size[s->rx_packet_size_head] = 0;
 437     s->mac_cmd = 0;
 438     s->mac_data = 0;
 439     s->afc_cfg = 0;
 440     s->e2p_cmd = 0;
 441     s->e2p_data = 0;
 442     s->free_timer_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40;
 443
 444     ptimer_stop(s->timer);
 445     ptimer_set_count(s->timer, 0xffff);
 446     s->gpt_cfg = 0xffff;
 447
 448     s->mac_cr = MAC_CR_PRMS;
 449     s->mac_hashh = 0;
 450     s->mac_hashl = 0;
 451     s->mac_mii_acc = 0;
 452     s->mac_mii_data = 0;
 453     s->mac_flow = 0;
 454
 455     s->read_word_n = 0;
 456     s->write_word_n = 0;
 457
 458     phy_reset(s);
 459
 460     s->eeprom_writable = 0;
 461     lan9118_reload_eeprom(s);
 462 }
 463
 464 static int lan9118_can_receive(NetClientState *nc)
 465 {
 466     return 1;
 467 }
 468
 469 static void rx_fifo_push(lan9118_state *s, uint32_t val)
 470 {
 471     int fifo_pos;
 472     fifo_pos = s->rx_fifo_head + s->rx_fifo_used;
 473     if (fifo_pos >= s->rx_fifo_size)
 474       fifo_pos -= s->rx_fifo_size;
 475     s->rx_fifo[fifo_pos] = val;
 476     s->rx_fifo_used++;
 477 }
 478
 479 /* Return nonzero if the packet is accepted by the filter.  */
 480 static int lan9118_filter(lan9118_state *s, const uint8_t *addr)
 481 {
 482     int multicast;
 483     uint32_t hash;
 484
 485     if (s->mac_cr & MAC_CR_PRMS) {
 486         return 1;
 487     }
 488     if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
 489         addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
 490         return (s->mac_cr & MAC_CR_BCAST) == 0;
 491     }
 492
 493     multicast = addr[0] & 1;
 494     if (multicast &&s->mac_cr & MAC_CR_MCPAS) {
 495         return 1;
 496     }
 497     if (multicast ? (s->mac_cr & MAC_CR_HPFILT) == 0
 498                   : (s->mac_cr & MAC_CR_HO) == 0) {
 499         /* Exact matching.  */
 500         hash = memcmp(addr, s->conf.macaddr.a, 6);
 501         if (s->mac_cr & MAC_CR_INVFILT) {
 502             return hash != 0;
 503         } else {
 504             return hash == 0;
 505         }
 506     } else {
 507         /* Hash matching  */
 508         hash = compute_mcast_idx(addr);
 509         if (hash & 0x20) {
 510             return (s->mac_hashh >> (hash & 0x1f)) & 1;
 511         } else {
 512             return (s->mac_hashl >> (hash & 0x1f)) & 1;
 513         }
 514     }
 515 }
 516
 517 static ssize_t lan9118_receive(NetClientState *nc, const uint8_t *buf,
 518                                size_t size)
 519 {
 520     lan9118_state *s = qemu_get_nic_opaque(nc);
 521     int fifo_len;
 522     int offset;
 523     int src_pos;
 524     int n;
 525     int filter;
 526     uint32_t val;
 527     uint32_t crc;
 528     uint32_t status;
 529
 530     if ((s->mac_cr & MAC_CR_RXEN) == 0) {
 531         return -1;
 532     }
 533
 534     if (size >= 2048 || size < 14) {
 535         return -1;
 536     }
 537
 538     /* TODO: Implement FIFO overflow notification.  */
 539     if (s->rx_status_fifo_used == s->rx_status_fifo_size) {
 540         return -1;
 541     }
 542
 543     filter = lan9118_filter(s, buf);
 544     if (!filter && (s->mac_cr & MAC_CR_RXALL) == 0) {
 545         return size;
 546     }
 547
 548     offset = (s->rx_cfg >> 8) & 0x1f;
 549     n = offset & 3;
 550     fifo_len = (size + n + 3) >> 2;
 551     /* Add a word for the CRC.  */
 552     fifo_len++;
 553     if (s->rx_fifo_size - s->rx_fifo_used < fifo_len) {
 554         return -1;
 555     }
 556
 557     DPRINTF("Got packet len:%d fifo:%d filter:%s\n",
 558             (int)size, fifo_len, filter ? "pass" : "fail");
 559     val = 0;
 560     crc = bswap32(crc32(~0, buf, size));
 561     for (src_pos = 0; src_pos < size; src_pos++) {
 562         val = (val >> 8) | ((uint32_t)buf[src_pos] << 24);
 563         n++;
 564         if (n == 4) {
 565             n = 0;
 566             rx_fifo_push(s, val);
 567             val = 0;
 568         }
 569     }
 570     if (n) {
 571         val >>= ((4 - n) * 8);
 572         val |= crc << (n * 8);
 573         rx_fifo_push(s, val);
 574         val = crc >> ((4 - n) * 8);
 575         rx_fifo_push(s, val);
 576     } else {
 577         rx_fifo_push(s, crc);
 578     }
 579     n = s->rx_status_fifo_head + s->rx_status_fifo_used;
 580     if (n >= s->rx_status_fifo_size) {
 581         n -= s->rx_status_fifo_size;
 582     }
 583     s->rx_packet_size[s->rx_packet_size_tail] = fifo_len;
 584     s->rx_packet_size_tail = (s->rx_packet_size_tail + 1023) & 1023;
 585     s->rx_status_fifo_used++;
 586
 587     status = (size + 4) << 16;
 588     if (buf[0] == 0xff && buf[1] == 0xff && buf[2] == 0xff &&
 589         buf[3] == 0xff && buf[4] == 0xff && buf[5] == 0xff) {
 590         status |= 0x00002000;
 591     } else if (buf[0] & 1) {
 592         status |= 0x00000400;
 593     }
 594     if (!filter) {
 595         status |= 0x40000000;
 596     }
 597     s->rx_status_fifo[n] = status;
 598
 599     if (s->rx_status_fifo_used > (s->fifo_int & 0xff)) {
 600         s->int_sts |= RSFL_INT;
 601     }
 602     lan9118_update(s);
 603
 604     return size;
 605 }
 606
 607 static uint32_t rx_fifo_pop(lan9118_state *s)
 608 {
 609     int n;
 610     uint32_t val;
 611
 612     if (s->rxp_size == 0 && s->rxp_pad == 0) {
 613         s->rxp_size = s->rx_packet_size[s->rx_packet_size_head];
 614         s->rx_packet_size[s->rx_packet_size_head] = 0;
 615         if (s->rxp_size != 0) {
 616             s->rx_packet_size_head = (s->rx_packet_size_head + 1023) & 1023;
 617             s->rxp_offset = (s->rx_cfg >> 10) & 7;
 618             n = s->rxp_offset + s->rxp_size;
 619             switch (s->rx_cfg >> 30) {
 620             case 1:
 621                 n = (-n) & 3;
 622                 break;
 623             case 2:
 624                 n = (-n) & 7;
 625                 break;
 626             default:
 627                 n = 0;
 628                 break;
 629             }
 630             s->rxp_pad = n;
 631             DPRINTF("Pop packet size:%d offset:%d pad: %d\n",
 632                     s->rxp_size, s->rxp_offset, s->rxp_pad);
 633         }
 634     }
 635     if (s->rxp_offset > 0) {
 636         s->rxp_offset--;
 637         val = 0;
 638     } else if (s->rxp_size > 0) {
 639         s->rxp_size--;
 640         val = s->rx_fifo[s->rx_fifo_head++];
 641         if (s->rx_fifo_head >= s->rx_fifo_size) {
 642             s->rx_fifo_head -= s->rx_fifo_size;
 643         }
 644         s->rx_fifo_used--;
 645     } else if (s->rxp_pad > 0) {
 646         s->rxp_pad--;
 647         val =  0;
 648     } else {
 649         DPRINTF("RX underflow\n");
 650         s->int_sts |= RXE_INT;
 651         val =  0;
 652     }
 653     lan9118_update(s);
 654     return val;
 655 }
 656
 657 static void do_tx_packet(lan9118_state *s)
 658 {
 659     int n;
 660     uint32_t status;
 661
 662     /* FIXME: Honor TX disable, and allow queueing of packets.  */
 663     if (s->phy_control & 0x4000)  {
 664         /* This assumes the receive routine doesn't touch the VLANClient.  */
 665         lan9118_receive(qemu_get_queue(s->nic), s->txp->data, s->txp->len);
 666     } else {
 667         qemu_send_packet(qemu_get_queue(s->nic), s->txp->data, s->txp->len);
 668     }
 669     s->txp->fifo_used = 0;
 670
 671     if (s->tx_status_fifo_used == 512) {
 672         /* Status FIFO full */
 673         return;
 674     }
 675     /* Add entry to status FIFO.  */
 676     status = s->txp->cmd_b & 0xffff0000u;
 677     DPRINTF("Sent packet tag:%04x len %d\n", status >> 16, s->txp->len);
 678     n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
 679     s->tx_status_fifo[n] = status;
 680     s->tx_status_fifo_used++;
 681     if (s->tx_status_fifo_used == 512) {
 682         s->int_sts |= TSFF_INT;
 683         /* TODO: Stop transmission.  */
 684     }
 685 }
 686
 687 static uint32_t rx_status_fifo_pop(lan9118_state *s)
 688 {
 689     uint32_t val;
 690
 691     val = s->rx_status_fifo[s->rx_status_fifo_head];
 692     if (s->rx_status_fifo_used != 0) {
 693         s->rx_status_fifo_used--;
 694         s->rx_status_fifo_head++;
 695         if (s->rx_status_fifo_head >= s->rx_status_fifo_size) {
 696             s->rx_status_fifo_head -= s->rx_status_fifo_size;
 697         }
 698         /* ??? What value should be returned when the FIFO is empty?  */
 699         DPRINTF("RX status pop 0x%08x\n", val);
 700     }
 701     return val;
 702 }
 703
 704 static uint32_t tx_status_fifo_pop(lan9118_state *s)
 705 {
 706     uint32_t val;
 707
 708     val = s->tx_status_fifo[s->tx_status_fifo_head];
 709     if (s->tx_status_fifo_used != 0) {
 710         s->tx_status_fifo_used--;
 711         s->tx_status_fifo_head = (s->tx_status_fifo_head + 1) & 511;
 712         /* ??? What value should be returned when the FIFO is empty?  */
 713     }
 714     return val;
 715 }
 716
 717 static void tx_fifo_push(lan9118_state *s, uint32_t val)
 718 {
 719     int n;
 720
 721     if (s->txp->fifo_used == s->tx_fifo_size) {
 722         s->int_sts |= TDFO_INT;
 723         return;
 724     }
 725     switch (s->txp->state) {
 726     case TX_IDLE:
 727         s->txp->cmd_a = val & 0x831f37ff;
 728         s->txp->fifo_used++;
 729         s->txp->state = TX_B;
 730         s->txp->buffer_size = extract32(s->txp->cmd_a, 0, 11);
 731         s->txp->offset = extract32(s->txp->cmd_a, 16, 5);
 732         break;
 733     case TX_B:
 734         if (s->txp->cmd_a & 0x2000) {
 735             /* First segment */
 736             s->txp->cmd_b = val;
 737             s->txp->fifo_used++;
 738             /* End alignment does not include command words.  */
 739             n = (s->txp->buffer_size + s->txp->offset + 3) >> 2;
 740             switch ((n >> 24) & 3) {
 741             case 1:
 742                 n = (-n) & 3;
 743                 break;
 744             case 2:
 745                 n = (-n) & 7;
 746                 break;
 747             default:
 748                 n = 0;
 749             }
 750             s->txp->pad = n;
 751             s->txp->len = 0;
 752         }
 753         DPRINTF("Block len:%d offset:%d pad:%d cmd %08x\n",
 754                 s->txp->buffer_size, s->txp->offset, s->txp->pad,
 755                 s->txp->cmd_a);
 756         s->txp->state = TX_DATA;
 757         break;
 758     case TX_DATA:
 759         if (s->txp->offset >= 4) {
 760             s->txp->offset -= 4;
 761             break;
 762         }
 763         if (s->txp->buffer_size <= 0 && s->txp->pad != 0) {
 764             s->txp->pad--;
 765         } else {
 766             n = MIN(4, s->txp->buffer_size + s->txp->offset);
 767             while (s->txp->offset) {
 768                 val >>= 8;
 769                 n--;
 770                 s->txp->offset--;
 771             }
 772             /* Documentation is somewhat unclear on the ordering of bytes
 773                in FIFO words.  Empirical results show it to be little-endian.
 774                */
 775             /* TODO: FIFO overflow checking.  */
 776             while (n--) {
 777                 s->txp->data[s->txp->len] = val & 0xff;
 778                 s->txp->len++;
 779                 val >>= 8;
 780                 s->txp->buffer_size--;
 781             }
 782             s->txp->fifo_used++;
 783         }
 784         if (s->txp->buffer_size <= 0 && s->txp->pad == 0) {
 785             if (s->txp->cmd_a & 0x1000) {
 786                 do_tx_packet(s);
 787             }
 788             if (s->txp->cmd_a & 0x80000000) {
 789                 s->int_sts |= TX_IOC_INT;
 790             }
 791             s->txp->state = TX_IDLE;
 792         }
 793         break;
 794     }
 795 }
 796
 797 static uint32_t do_phy_read(lan9118_state *s, int reg)
 798 {
 799     uint32_t val;
 800
 801     switch (reg) {
 802     case 0: /* Basic Control */
 803         return s->phy_control;
 804     case 1: /* Basic Status */
 805         return s->phy_status;
 806     case 2: /* ID1 */
 807         return 0x0007;
 808     case 3: /* ID2 */
 809         return 0xc0d1;
 810     case 4: /* Auto-neg advertisement */
 811         return s->phy_advertise;
 812     case 5: /* Auto-neg Link Partner Ability */
 813         return 0x0f71;
 814     case 6: /* Auto-neg Expansion */
 815         return 1;
 816         /* TODO 17, 18, 27, 29, 30, 31 */
 817     case 29: /* Interrupt source.  */
 818         val = s->phy_int;
 819         s->phy_int = 0;
 820         phy_update_irq(s);
 821         return val;
 822     case 30: /* Interrupt mask */
 823         return s->phy_int_mask;
 824     default:
 825         BADF("PHY read reg %d\n", reg);
 826         return 0;
 827     }
 828 }
 829
 830 static void do_phy_write(lan9118_state *s, int reg, uint32_t val)
 831 {
 832     switch (reg) {
 833     case 0: /* Basic Control */
 834         if (val & 0x8000) {
 835             phy_reset(s);
 836             break;
 837         }
 838         s->phy_control = val & 0x7980;
 839         /* Complete autonegotiation immediately.  */
 840         if (val & 0x1000) {
 841             s->phy_status |= 0x0020;
 842         }
 843         break;
 844     case 4: /* Auto-neg advertisement */
 845         s->phy_advertise = (val & 0x2d7f) | 0x80;
 846         break;
 847         /* TODO 17, 18, 27, 31 */
 848     case 30: /* Interrupt mask */
 849         s->phy_int_mask = val & 0xff;
 850         phy_update_irq(s);
 851         break;
 852     default:
 853         BADF("PHY write reg %d = 0x%04x\n", reg, val);
 854     }
 855 }
 856
 857 static void do_mac_write(lan9118_state *s, int reg, uint32_t val)
 858 {
 859     switch (reg) {
 860     case MAC_CR:
 861         if ((s->mac_cr & MAC_CR_RXEN) != 0 && (val & MAC_CR_RXEN) == 0) {
 862             s->int_sts |= RXSTOP_INT;
 863         }
 864         s->mac_cr = val & ~MAC_CR_RESERVED;
 865         DPRINTF("MAC_CR: %08x\n", val);
 866         break;
 867     case MAC_ADDRH:
 868         s->conf.macaddr.a[4] = val & 0xff;
 869         s->conf.macaddr.a[5] = (val >> 8) & 0xff;
 870         lan9118_mac_changed(s);
 871         break;
 872     case MAC_ADDRL:
 873         s->conf.macaddr.a[0] = val & 0xff;
 874         s->conf.macaddr.a[1] = (val >> 8) & 0xff;
 875         s->conf.macaddr.a[2] = (val >> 16) & 0xff;
 876         s->conf.macaddr.a[3] = (val >> 24) & 0xff;
 877         lan9118_mac_changed(s);
 878         break;
 879     case MAC_HASHH:
 880         s->mac_hashh = val;
 881         break;
 882     case MAC_HASHL:
 883         s->mac_hashl = val;
 884         break;
 885     case MAC_MII_ACC:
 886         s->mac_mii_acc = val & 0xffc2;
 887         if (val & 2) {
 888             DPRINTF("PHY write %d = 0x%04x\n",
 889                     (val >> 6) & 0x1f, s->mac_mii_data);
 890             do_phy_write(s, (val >> 6) & 0x1f, s->mac_mii_data);
 891         } else {
 892             s->mac_mii_data = do_phy_read(s, (val >> 6) & 0x1f);
 893             DPRINTF("PHY read %d = 0x%04x\n",
 894                     (val >> 6) & 0x1f, s->mac_mii_data);
 895         }
 896         break;
 897     case MAC_MII_DATA:
 898         s->mac_mii_data = val & 0xffff;
 899         break;
 900     case MAC_FLOW:
 901         s->mac_flow = val & 0xffff0000;
 902         break;
 903     case MAC_VLAN1:
 904         /* Writing to this register changes a condition for
 905          * FrameTooLong bit in rx_status.  Since we do not set
 906          * FrameTooLong anyway, just ignore write to this.
 907          */
 908         break;
 909     default:
 910         hw_error("lan9118: Unimplemented MAC register write: %d = 0x%x\n",
 911                  s->mac_cmd & 0xf, val);
 912     }
 913 }
 914
 915 static uint32_t do_mac_read(lan9118_state *s, int reg)
 916 {
 917     switch (reg) {
 918     case MAC_CR:
 919         return s->mac_cr;
 920     case MAC_ADDRH:
 921         return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8);
 922     case MAC_ADDRL:
 923         return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8)
 924                | (s->conf.macaddr.a[2] << 16) | (s->conf.macaddr.a[3] << 24);
 925     case MAC_HASHH:
 926         return s->mac_hashh;
 927         break;
 928     case MAC_HASHL:
 929         return s->mac_hashl;
 930         break;
 931     case MAC_MII_ACC:
 932         return s->mac_mii_acc;
 933     case MAC_MII_DATA:
 934         return s->mac_mii_data;
 935     case MAC_FLOW:
 936         return s->mac_flow;
 937     default:
 938         hw_error("lan9118: Unimplemented MAC register read: %d\n",
 939                  s->mac_cmd & 0xf);
 940     }
 941 }
 942
 943 static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
 944 {
 945     s->e2p_cmd = (s->e2p_cmd & 0x10) | (cmd << 28) | addr;
 946     switch (cmd) {
 947     case 0:
 948         s->e2p_data = s->eeprom[addr];
 949         DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
 950         break;
 951     case 1:
 952         s->eeprom_writable = 0;
 953         DPRINTF("EEPROM Write Disable\n");
 954         break;
 955     case 2: /* EWEN */
 956         s->eeprom_writable = 1;
 957         DPRINTF("EEPROM Write Enable\n");
 958         break;
 959     case 3: /* WRITE */
 960         if (s->eeprom_writable) {
 961             s->eeprom[addr] &= s->e2p_data;
 962             DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
 963         } else {
 964             DPRINTF("EEPROM Write %d (ignored)\n", addr);
 965         }
 966         break;
 967     case 4: /* WRAL */
 968         if (s->eeprom_writable) {
 969             for (addr = 0; addr < 128; addr++) {
 970                 s->eeprom[addr] &= s->e2p_data;
 971             }
 972             DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
 973         } else {
 974             DPRINTF("EEPROM Write All (ignored)\n");
 975         }
 976         break;
 977     case 5: /* ERASE */
 978         if (s->eeprom_writable) {
 979             s->eeprom[addr] = 0xff;
 980             DPRINTF("EEPROM Erase %d\n", addr);
 981         } else {
 982             DPRINTF("EEPROM Erase %d (ignored)\n", addr);
 983         }
 984         break;
 985     case 6: /* ERAL */
 986         if (s->eeprom_writable) {
 987             memset(s->eeprom, 0xff, 128);
 988             DPRINTF("EEPROM Erase All\n");
 989         } else {
 990             DPRINTF("EEPROM Erase All (ignored)\n");
 991         }
 992         break;
 993     case 7: /* RELOAD */
 994         lan9118_reload_eeprom(s);
 995         break;
 996     }
 997 }
 998
 999 static void lan9118_tick(void *opaque)
1000 {
1001     lan9118_state *s = (lan9118_state *)opaque;
1002     if (s->int_en & GPT_INT) {
1003         s->int_sts |= GPT_INT;
1004     }
1005     lan9118_update(s);
1006 }
1007
1008 static void lan9118_writel(void *opaque, hwaddr offset,
1009                            uint64_t val, unsigned size)
1010 {
1011     lan9118_state *s = (lan9118_state *)opaque;
1012     offset &= 0xff;
1013
1014     //DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
1015     if (offset >= 0x20 && offset < 0x40) {
1016         /* TX FIFO */
1017         tx_fifo_push(s, val);
1018         return;
1019     }
1020     switch (offset) {
1021     case CSR_IRQ_CFG:
1022         /* TODO: Implement interrupt deassertion intervals.  */
1023         val &= (IRQ_EN | IRQ_POL | IRQ_TYPE);
1024         s->irq_cfg = (s->irq_cfg & IRQ_INT) | val;
1025         break;
1026     case CSR_INT_STS:
1027         s->int_sts &= ~val;
1028         break;
1029     case CSR_INT_EN:
1030         s->int_en = val & ~RESERVED_INT;
1031         s->int_sts |= val & SW_INT;
1032         break;
1033     case CSR_FIFO_INT:
1034         DPRINTF("FIFO INT levels %08x\n", val);
1035         s->fifo_int = val;
1036         break;
1037     case CSR_RX_CFG:
1038         if (val & 0x8000) {
1039             /* RX_DUMP */
1040             s->rx_fifo_used = 0;
1041             s->rx_status_fifo_used = 0;
1042             s->rx_packet_size_tail = s->rx_packet_size_head;
1043             s->rx_packet_size[s->rx_packet_size_head] = 0;
1044         }
1045         s->rx_cfg = val & 0xcfff1ff0;
1046         break;
1047     case CSR_TX_CFG:
1048         if (val & 0x8000) {
1049             s->tx_status_fifo_used = 0;
1050         }
1051         if (val & 0x4000) {
1052             s->txp->state = TX_IDLE;
1053             s->txp->fifo_used = 0;
1054             s->txp->cmd_a = 0xffffffff;
1055         }
1056         s->tx_cfg = val & 6;
1057         break;
1058     case CSR_HW_CFG:
1059         if (val & 1) {
1060             /* SRST */
1061             lan9118_reset(DEVICE(s));
1062         } else {
1063             s->hw_cfg = (val & 0x003f300) | (s->hw_cfg & 0x4);
1064         }
1065         break;
1066     case CSR_RX_DP_CTRL:
1067         if (val & 0x80000000) {
1068             /* Skip forward to next packet.  */
1069             s->rxp_pad = 0;
1070             s->rxp_offset = 0;
1071             if (s->rxp_size == 0) {
1072                 /* Pop a word to start the next packet.  */
1073                 rx_fifo_pop(s);
1074                 s->rxp_pad = 0;
1075                 s->rxp_offset = 0;
1076             }
1077             s->rx_fifo_head += s->rxp_size;
1078             if (s->rx_fifo_head >= s->rx_fifo_size) {
1079                 s->rx_fifo_head -= s->rx_fifo_size;
1080             }
1081         }
1082         break;
1083     case CSR_PMT_CTRL:
1084         if (val & 0x400) {
1085             phy_reset(s);
1086         }
1087         s->pmt_ctrl &= ~0x34e;
1088         s->pmt_ctrl |= (val & 0x34e);
1089         break;
1090     case CSR_GPIO_CFG:
1091         /* Probably just enabling LEDs.  */
1092         s->gpio_cfg = val & 0x7777071f;
1093         break;
1094     case CSR_GPT_CFG:
1095         if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
1096             if (val & GPT_TIMER_EN) {
1097                 ptimer_set_count(s->timer, val & 0xffff);
1098                 ptimer_run(s->timer, 0);
1099             } else {
1100                 ptimer_stop(s->timer);
1101                 ptimer_set_count(s->timer, 0xffff);
1102             }
1103         }
1104         s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
1105         break;
1106     case CSR_WORD_SWAP:
1107         /* Ignored because we're in 32-bit mode.  */
1108         s->word_swap = val;
1109         break;
1110     case CSR_MAC_CSR_CMD:
1111         s->mac_cmd = val & 0x4000000f;
1112         if (val & 0x80000000) {
1113             if (val & 0x40000000) {
1114                 s->mac_data = do_mac_read(s, val & 0xf);
1115                 DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data);
1116             } else {
1117                 DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data);
1118                 do_mac_write(s, val & 0xf, s->mac_data);
1119             }
1120         }
1121         break;
1122     case CSR_MAC_CSR_DATA:
1123         s->mac_data = val;
1124         break;
1125     case CSR_AFC_CFG:
1126         s->afc_cfg = val & 0x00ffffff;
1127         break;
1128     case CSR_E2P_CMD:
1129         lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0x7f);
1130         break;
1131     case CSR_E2P_DATA:
1132         s->e2p_data = val & 0xff;
1133         break;
1134
1135     default:
1136         hw_error("lan9118_write: Bad reg 0x%x = %x\n", (int)offset, (int)val);
1137         break;
1138     }
1139     lan9118_update(s);
1140 }
1141
1142 static void lan9118_writew(void *opaque, hwaddr offset,
1143                            uint32_t val)
1144 {
1145     lan9118_state *s = (lan9118_state *)opaque;
1146     offset &= 0xff;
1147
1148     if (s->write_word_prev_offset != (offset & ~0x3)) {
1149         /* New offset, reset word counter */
1150         s->write_word_n = 0;
1151         s->write_word_prev_offset = offset & ~0x3;
1152     }
1153
1154     if (offset & 0x2) {
1155         s->write_word_h = val;
1156     } else {
1157         s->write_word_l = val;
1158     }
1159
1160     //DPRINTF("Writew reg 0x%02x = 0x%08x\n", (int)offset, val);
1161     s->write_word_n++;
1162     if (s->write_word_n == 2) {
1163         s->write_word_n = 0;
1164         lan9118_writel(s, offset & ~3, s->write_word_l +
1165                 (s->write_word_h << 16), 4);
1166     }
1167 }
1168
1169 static void lan9118_16bit_mode_write(void *opaque, hwaddr offset,
1170                                      uint64_t val, unsigned size)
1171 {
1172     switch (size) {
1173     case 2:
1174         lan9118_writew(opaque, offset, (uint32_t)val);
1175         return;
1176     case 4:
1177         lan9118_writel(opaque, offset, val, size);
1178         return;
1179     }
1180
1181     hw_error("lan9118_write: Bad size 0x%x\n", size);
1182 }
1183
1184 static uint64_t lan9118_readl(void *opaque, hwaddr offset,
1185                               unsigned size)
1186 {
1187     lan9118_state *s = (lan9118_state *)opaque;
1188
1189     //DPRINTF("Read reg 0x%02x\n", (int)offset);
1190     if (offset < 0x20) {
1191         /* RX FIFO */
1192         return rx_fifo_pop(s);
1193     }
1194     switch (offset) {
1195     case 0x40:
1196         return rx_status_fifo_pop(s);
1197     case 0x44:
1198         return s->rx_status_fifo[s->tx_status_fifo_head];
1199     case 0x48:
1200         return tx_status_fifo_pop(s);
1201     case 0x4c:
1202         return s->tx_status_fifo[s->tx_status_fifo_head];
1203     case CSR_ID_REV:
1204         return 0x01180001;
1205     case CSR_IRQ_CFG:
1206         return s->irq_cfg;
1207     case CSR_INT_STS:
1208         return s->int_sts;
1209     case CSR_INT_EN:
1210         return s->int_en;
1211     case CSR_BYTE_TEST:
1212         return 0x87654321;
1213     case CSR_FIFO_INT:
1214         return s->fifo_int;
1215     case CSR_RX_CFG:
1216         return s->rx_cfg;
1217     case CSR_TX_CFG:
1218         return s->tx_cfg;
1219     case CSR_HW_CFG:
1220         return s->hw_cfg;
1221     case CSR_RX_DP_CTRL:
1222         return 0;
1223     case CSR_RX_FIFO_INF:
1224         return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2);
1225     case CSR_TX_FIFO_INF:
1226         return (s->tx_status_fifo_used << 16)
1227                | (s->tx_fifo_size - s->txp->fifo_used);
1228     case CSR_PMT_CTRL:
1229         return s->pmt_ctrl;
1230     case CSR_GPIO_CFG:
1231         return s->gpio_cfg;
1232     case CSR_GPT_CFG:
1233         return s->gpt_cfg;
1234     case CSR_GPT_CNT:
1235         return ptimer_get_count(s->timer);
1236     case CSR_WORD_SWAP:
1237         return s->word_swap;
1238     case CSR_FREE_RUN:
1239         return (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40) - s->free_timer_start;
1240     case CSR_RX_DROP:
1241         /* TODO: Implement dropped frames counter.  */
1242         return 0;
1243     case CSR_MAC_CSR_CMD:
1244         return s->mac_cmd;
1245     case CSR_MAC_CSR_DATA:
1246         return s->mac_data;
1247     case CSR_AFC_CFG:
1248         return s->afc_cfg;
1249     case CSR_E2P_CMD:
1250         return s->e2p_cmd;
1251     case CSR_E2P_DATA:
1252         return s->e2p_data;
1253     }
1254     hw_error("lan9118_read: Bad reg 0x%x\n", (int)offset);
1255     return 0;
1256 }
1257
1258 static uint32_t lan9118_readw(void *opaque, hwaddr offset)
1259 {
1260     lan9118_state *s = (lan9118_state *)opaque;
1261     uint32_t val;
1262
1263     if (s->read_word_prev_offset != (offset & ~0x3)) {
1264         /* New offset, reset word counter */
1265         s->read_word_n = 0;
1266         s->read_word_prev_offset = offset & ~0x3;
1267     }
1268
1269     s->read_word_n++;
1270     if (s->read_word_n == 1) {
1271         s->read_long = lan9118_readl(s, offset & ~3, 4);
1272     } else {
1273         s->read_word_n = 0;
1274     }
1275
1276     if (offset & 2) {
1277         val = s->read_long >> 16;
1278     } else {
1279         val = s->read_long & 0xFFFF;
1280     }
1281
1282     //DPRINTF("Readw reg 0x%02x, val 0x%x\n", (int)offset, val);
1283     return val;
1284 }
1285
1286 static uint64_t lan9118_16bit_mode_read(void *opaque, hwaddr offset,
1287                                         unsigned size)
1288 {
1289     switch (size) {
1290     case 2:
1291         return lan9118_readw(opaque, offset);
1292     case 4:
1293         return lan9118_readl(opaque, offset, size);
1294     }
1295
1296     hw_error("lan9118_read: Bad size 0x%x\n", size);
1297     return 0;
1298 }
1299
1300 static const MemoryRegionOps lan9118_mem_ops = {
1301     .read = lan9118_readl,
1302     .write = lan9118_writel,
1303     .endianness = DEVICE_NATIVE_ENDIAN,
1304 };
1305
1306 static const MemoryRegionOps lan9118_16bit_mem_ops = {
1307     .read = lan9118_16bit_mode_read,
1308     .write = lan9118_16bit_mode_write,
1309     .endianness = DEVICE_NATIVE_ENDIAN,
1310 };
1311
1312 static NetClientInfo net_lan9118_info = {
1313     .type = NET_CLIENT_OPTIONS_KIND_NIC,
1314     .size = sizeof(NICState),
1315     .can_receive = lan9118_can_receive,
1316     .receive = lan9118_receive,
1317     .link_status_changed = lan9118_set_link,
1318 };
1319
1320 static int lan9118_init1(SysBusDevice *sbd)
1321 {
1322     DeviceState *dev = DEVICE(sbd);
1323     lan9118_state *s = LAN9118(dev);
1324     QEMUBH *bh;
1325     int i;
1326     const MemoryRegionOps *mem_ops =
1327             s->mode_16bit ? &lan9118_16bit_mem_ops : &lan9118_mem_ops;
1328
1329     memory_region_init_io(&s->mmio, OBJECT(dev), mem_ops, s,
1330                           "lan9118-mmio", 0x100);
1331     sysbus_init_mmio(sbd, &s->mmio);
1332     sysbus_init_irq(sbd, &s->irq);
1333     qemu_macaddr_default_if_unset(&s->conf.macaddr);
1334
1335     s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1336                           object_get_typename(OBJECT(dev)), dev->id, s);
1337     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1338     s->eeprom[0] = 0xa5;
1339     for (i = 0; i < 6; i++) {
1340         s->eeprom[i + 1] = s->conf.macaddr.a[i];
1341     }
1342     s->pmt_ctrl = 1;
1343     s->txp = &s->tx_packet;
1344
1345     bh = qemu_bh_new(lan9118_tick, s);
1346     s->timer = ptimer_init(bh);
1347     ptimer_set_freq(s->timer, 10000);
1348     ptimer_set_limit(s->timer, 0xffff, 1);
1349
1350     return 0;
1351 }
1352
1353 static Property lan9118_properties[] = {
1354     DEFINE_NIC_PROPERTIES(lan9118_state, conf),
1355     DEFINE_PROP_UINT32("mode_16bit", lan9118_state, mode_16bit, 0),
1356     DEFINE_PROP_END_OF_LIST(),
1357 };
1358
1359 static void lan9118_class_init(ObjectClass *klass, void *data)
1360 {
1361     DeviceClass *dc = DEVICE_CLASS(klass);
1362     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1363
1364     k->init = lan9118_init1;
1365     dc->reset = lan9118_reset;
1366     dc->props = lan9118_properties;
1367     dc->vmsd = &vmstate_lan9118;
1368 }
1369
1370 static const TypeInfo lan9118_info = {
1371     .name          = TYPE_LAN9118,
1372     .parent        = TYPE_SYS_BUS_DEVICE,
1373     .instance_size = sizeof(lan9118_state),
1374     .class_init    = lan9118_class_init,
1375 };
1376
1377 static void lan9118_register_types(void)
1378 {
1379     type_register_static(&lan9118_info);
1380 }
1381
1382 /* Legacy helper function.  Should go away when machine config files are
1383    implemented.  */
1384 void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1385 {
1386     DeviceState *dev;
1387     SysBusDevice *s;
1388
1389     qemu_check_nic_model(nd, "lan9118");
1390     dev = qdev_create(NULL, TYPE_LAN9118);
1391     qdev_set_nic_properties(dev, nd);
1392     qdev_init_nofail(dev);
1393     s = SYS_BUS_DEVICE(dev);
1394     sysbus_mmio_map(s, 0, base);
1395     sysbus_connect_irq(s, 0, irq);
1396 }
1397
1398 type_init(lan9118_register_types)