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 "qemu/osdep.h"
  14 #include "hw/sysbus.h"
  15 #include "net/net.h"
  16 #include "hw/devices.h"
  17 #include "sysemu/sysemu.h"
  18 #include "hw/ptimer.h"
  19 #include "qemu/log.h"
  20 /* For crc32 */
  21 #include <zlib.h>
  22
  23 //#define DEBUG_LAN9118
  24
  25 #ifdef DEBUG_LAN9118
  26 #define DPRINTF(fmt, ...) \
  27 do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  28 #define BADF(fmt, ...) \
  29 do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  30 #else
  31 #define DPRINTF(fmt, ...) do {} while(0)
  32 #define BADF(fmt, ...) \
  33 do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  34 #endif
  35
  36 #define CSR_ID_REV      0x50
  37 #define CSR_IRQ_CFG     0x54
  38 #define CSR_INT_STS     0x58
  39 #define CSR_INT_EN      0x5c
  40 #define CSR_BYTE_TEST   0x64
  41 #define CSR_FIFO_INT    0x68
  42 #define CSR_RX_CFG      0x6c
  43 #define CSR_TX_CFG      0x70
  44 #define CSR_HW_CFG      0x74
  45 #define CSR_RX_DP_CTRL  0x78
  46 #define CSR_RX_FIFO_INF 0x7c
  47 #define CSR_TX_FIFO_INF 0x80
  48 #define CSR_PMT_CTRL    0x84
  49 #define CSR_GPIO_CFG    0x88
  50 #define CSR_GPT_CFG     0x8c
  51 #define CSR_GPT_CNT     0x90
  52 #define CSR_WORD_SWAP   0x98
  53 #define CSR_FREE_RUN    0x9c
  54 #define CSR_RX_DROP     0xa0
  55 #define CSR_MAC_CSR_CMD 0xa4
  56 #define CSR_MAC_CSR_DATA 0xa8
  57 #define CSR_AFC_CFG     0xac
  58 #define CSR_E2P_CMD     0xb0
  59 #define CSR_E2P_DATA    0xb4
  60
  61 #define E2P_CMD_MAC_ADDR_LOADED 0x100
  62
  63 /* IRQ_CFG */
  64 #define IRQ_INT         0x00001000
  65 #define IRQ_EN          0x00000100
  66 #define IRQ_POL         0x00000010
  67 #define IRQ_TYPE        0x00000001
  68
  69 /* INT_STS/INT_EN */
  70 #define SW_INT          0x80000000
  71 #define TXSTOP_INT      0x02000000
  72 #define RXSTOP_INT      0x01000000
  73 #define RXDFH_INT       0x00800000
  74 #define TX_IOC_INT      0x00200000
  75 #define RXD_INT         0x00100000
  76 #define GPT_INT         0x00080000
  77 #define PHY_INT         0x00040000
  78 #define PME_INT         0x00020000
  79 #define TXSO_INT        0x00010000
  80 #define RWT_INT         0x00008000
  81 #define RXE_INT         0x00004000
  82 #define TXE_INT         0x00002000
  83 #define TDFU_INT        0x00000800
  84 #define TDFO_INT        0x00000400
  85 #define TDFA_INT        0x00000200
  86 #define TSFF_INT        0x00000100
  87 #define TSFL_INT        0x00000080
  88 #define RXDF_INT        0x00000040
  89 #define RDFL_INT        0x00000020
  90 #define RSFF_INT        0x00000010
  91 #define RSFL_INT        0x00000008
  92 #define GPIO2_INT       0x00000004
  93 #define GPIO1_INT       0x00000002
  94 #define GPIO0_INT       0x00000001
  95 #define RESERVED_INT    0x7c001000
  96
  97 #define MAC_CR          1
  98 #define MAC_ADDRH       2
  99 #define MAC_ADDRL       3
 100 #define MAC_HASHH       4
 101 #define MAC_HASHL       5
 102 #define MAC_MII_ACC     6
 103 #define MAC_MII_DATA    7
 104 #define MAC_FLOW        8
 105 #define MAC_VLAN1       9 /* TODO */
 106 #define MAC_VLAN2       10 /* TODO */
 107 #define MAC_WUFF        11 /* TODO */
 108 #define MAC_WUCSR       12 /* TODO */
 109
 110 #define MAC_CR_RXALL    0x80000000
 111 #define MAC_CR_RCVOWN   0x00800000
 112 #define MAC_CR_LOOPBK   0x00200000
 113 #define MAC_CR_FDPX     0x00100000
 114 #define MAC_CR_MCPAS    0x00080000
 115 #define MAC_CR_PRMS     0x00040000
 116 #define MAC_CR_INVFILT  0x00020000
 117 #define MAC_CR_PASSBAD  0x00010000
 118 #define MAC_CR_HO       0x00008000
 119 #define MAC_CR_HPFILT   0x00002000
 120 #define MAC_CR_LCOLL    0x00001000
 121 #define MAC_CR_BCAST    0x00000800
 122 #define MAC_CR_DISRTY   0x00000400
 123 #define MAC_CR_PADSTR   0x00000100
 124 #define MAC_CR_BOLMT    0x000000c0
 125 #define MAC_CR_DFCHK    0x00000020
 126 #define MAC_CR_TXEN     0x00000008
 127 #define MAC_CR_RXEN     0x00000004
 128 #define MAC_CR_RESERVED 0x7f404213
 129
 130 #define PHY_INT_ENERGYON            0x80
 131 #define PHY_INT_AUTONEG_COMPLETE    0x40
 132 #define PHY_INT_FAULT               0x20
 133 #define PHY_INT_DOWN                0x10
 134 #define PHY_INT_AUTONEG_LP          0x08
 135 #define PHY_INT_PARFAULT            0x04
 136 #define PHY_INT_AUTONEG_PAGE        0x02
 137
 138 #define GPT_TIMER_EN    0x20000000
 139
 140 enum tx_state {
 141     TX_IDLE,
 142     TX_B,
 143     TX_DATA
 144 };
 145
 146 typedef struct {
 147     /* state is a tx_state but we can't put enums in VMStateDescriptions. */
 148     uint32_t state;
 149     uint32_t cmd_a;
 150     uint32_t cmd_b;
 151     int32_t buffer_size;
 152     int32_t offset;
 153     int32_t pad;
 154     int32_t fifo_used;
 155     int32_t len;
 156     uint8_t data[2048];
 157 } LAN9118Packet;
 158
 159 static const VMStateDescription vmstate_lan9118_packet = {
 160     .name = "lan9118_packet",
 161     .version_id = 1,
 162     .minimum_version_id = 1,
 163     .fields = (VMStateField[]) {
 164         VMSTATE_UINT32(state, LAN9118Packet),
 165         VMSTATE_UINT32(cmd_a, LAN9118Packet),
 166         VMSTATE_UINT32(cmd_b, LAN9118Packet),
 167         VMSTATE_INT32(buffer_size, LAN9118Packet),
 168         VMSTATE_INT32(offset, LAN9118Packet),
 169         VMSTATE_INT32(pad, LAN9118Packet),
 170         VMSTATE_INT32(fifo_used, LAN9118Packet),
 171         VMSTATE_INT32(len, LAN9118Packet),
 172         VMSTATE_UINT8_ARRAY(data, LAN9118Packet, 2048),
 173         VMSTATE_END_OF_LIST()
 174     }
 175 };
 176
 177 #define TYPE_LAN9118 "lan9118"
 178 #define LAN9118(obj) OBJECT_CHECK(lan9118_state, (obj), TYPE_LAN9118)
 179
 180 typedef struct {
 181     SysBusDevice parent_obj;
 182
 183     NICState *nic;
 184     NICConf conf;
 185     qemu_irq irq;
 186     MemoryRegion mmio;
 187     ptimer_state *timer;
 188
 189     uint32_t irq_cfg;
 190     uint32_t int_sts;
 191     uint32_t int_en;
 192     uint32_t fifo_int;
 193     uint32_t rx_cfg;
 194     uint32_t tx_cfg;
 195     uint32_t hw_cfg;
 196     uint32_t pmt_ctrl;
 197     uint32_t gpio_cfg;
 198     uint32_t gpt_cfg;
 199     uint32_t word_swap;
 200     uint32_t free_timer_start;
 201     uint32_t mac_cmd;
 202     uint32_t mac_data;
 203     uint32_t afc_cfg;
 204     uint32_t e2p_cmd;
 205     uint32_t e2p_data;
 206
 207     uint32_t mac_cr;
 208     uint32_t mac_hashh;
 209     uint32_t mac_hashl;
 210     uint32_t mac_mii_acc;
 211     uint32_t mac_mii_data;
 212     uint32_t mac_flow;
 213
 214     uint32_t phy_status;
 215     uint32_t phy_control;
 216     uint32_t phy_advertise;
 217     uint32_t phy_int;
 218     uint32_t phy_int_mask;
 219
 220     int32_t eeprom_writable;
 221     uint8_t eeprom[128];
 222
 223     int32_t tx_fifo_size;
 224     LAN9118Packet *txp;
 225     LAN9118Packet tx_packet;
 226
 227     int32_t tx_status_fifo_used;
 228     int32_t tx_status_fifo_head;
 229     uint32_t tx_status_fifo[512];
 230
 231     int32_t rx_status_fifo_size;
 232     int32_t rx_status_fifo_used;
 233     int32_t rx_status_fifo_head;
 234     uint32_t rx_status_fifo[896];
 235     int32_t rx_fifo_size;
 236     int32_t rx_fifo_used;
 237     int32_t rx_fifo_head;
 238     uint32_t rx_fifo[3360];
 239     int32_t rx_packet_size_head;
 240     int32_t rx_packet_size_tail;
 241     int32_t rx_packet_size[1024];
 242
 243     int32_t rxp_offset;
 244     int32_t rxp_size;
 245     int32_t rxp_pad;
 246
 247     uint32_t write_word_prev_offset;
 248     uint32_t write_word_n;
 249     uint16_t write_word_l;
 250     uint16_t write_word_h;
 251     uint32_t read_word_prev_offset;
 252     uint32_t read_word_n;
 253     uint32_t read_long;
 254
 255     uint32_t mode_16bit;
 256 } lan9118_state;
 257
 258 static const VMStateDescription vmstate_lan9118 = {
 259     .name = "lan9118",
 260     .version_id = 2,
 261     .minimum_version_id = 1,
 262     .fields = (VMStateField[]) {
 263         VMSTATE_PTIMER(timer, lan9118_state),
 264         VMSTATE_UINT32(irq_cfg, lan9118_state),
 265         VMSTATE_UINT32(int_sts, lan9118_state),
 266         VMSTATE_UINT32(int_en, lan9118_state),
 267         VMSTATE_UINT32(fifo_int, lan9118_state),
 268         VMSTATE_UINT32(rx_cfg, lan9118_state),
 269         VMSTATE_UINT32(tx_cfg, lan9118_state),
 270         VMSTATE_UINT32(hw_cfg, lan9118_state),
 271         VMSTATE_UINT32(pmt_ctrl, lan9118_state),
 272         VMSTATE_UINT32(gpio_cfg, lan9118_state),
 273         VMSTATE_UINT32(gpt_cfg, lan9118_state),
 274         VMSTATE_UINT32(word_swap, lan9118_state),
 275         VMSTATE_UINT32(free_timer_start, lan9118_state),
 276         VMSTATE_UINT32(mac_cmd, lan9118_state),
 277         VMSTATE_UINT32(mac_data, lan9118_state),
 278         VMSTATE_UINT32(afc_cfg, lan9118_state),
 279         VMSTATE_UINT32(e2p_cmd, lan9118_state),
 280         VMSTATE_UINT32(e2p_data, lan9118_state),
 281         VMSTATE_UINT32(mac_cr, lan9118_state),
 282         VMSTATE_UINT32(mac_hashh, lan9118_state),
 283         VMSTATE_UINT32(mac_hashl, lan9118_state),
 284         VMSTATE_UINT32(mac_mii_acc, lan9118_state),
 285         VMSTATE_UINT32(mac_mii_data, lan9118_state),
 286         VMSTATE_UINT32(mac_flow, lan9118_state),
 287         VMSTATE_UINT32(phy_status, lan9118_state),
 288         VMSTATE_UINT32(phy_control, lan9118_state),
 289         VMSTATE_UINT32(phy_advertise, lan9118_state),
 290         VMSTATE_UINT32(phy_int, lan9118_state),
 291         VMSTATE_UINT32(phy_int_mask, lan9118_state),
 292         VMSTATE_INT32(eeprom_writable, lan9118_state),
 293         VMSTATE_UINT8_ARRAY(eeprom, lan9118_state, 128),
 294         VMSTATE_INT32(tx_fifo_size, lan9118_state),
 295         /* txp always points at tx_packet so need not be saved */
 296         VMSTATE_STRUCT(tx_packet, lan9118_state, 0,
 297                        vmstate_lan9118_packet, LAN9118Packet),
 298         VMSTATE_INT32(tx_status_fifo_used, lan9118_state),
 299         VMSTATE_INT32(tx_status_fifo_head, lan9118_state),
 300         VMSTATE_UINT32_ARRAY(tx_status_fifo, lan9118_state, 512),
 301         VMSTATE_INT32(rx_status_fifo_size, lan9118_state),
 302         VMSTATE_INT32(rx_status_fifo_used, lan9118_state),
 303         VMSTATE_INT32(rx_status_fifo_head, lan9118_state),
 304         VMSTATE_UINT32_ARRAY(rx_status_fifo, lan9118_state, 896),
 305         VMSTATE_INT32(rx_fifo_size, lan9118_state),
 306         VMSTATE_INT32(rx_fifo_used, lan9118_state),
 307         VMSTATE_INT32(rx_fifo_head, lan9118_state),
 308         VMSTATE_UINT32_ARRAY(rx_fifo, lan9118_state, 3360),
 309         VMSTATE_INT32(rx_packet_size_head, lan9118_state),
 310         VMSTATE_INT32(rx_packet_size_tail, lan9118_state),
 311         VMSTATE_INT32_ARRAY(rx_packet_size, lan9118_state, 1024),
 312         VMSTATE_INT32(rxp_offset, lan9118_state),
 313         VMSTATE_INT32(rxp_size, lan9118_state),
 314         VMSTATE_INT32(rxp_pad, lan9118_state),
 315         VMSTATE_UINT32_V(write_word_prev_offset, lan9118_state, 2),
 316         VMSTATE_UINT32_V(write_word_n, lan9118_state, 2),
 317         VMSTATE_UINT16_V(write_word_l, lan9118_state, 2),
 318         VMSTATE_UINT16_V(write_word_h, lan9118_state, 2),
 319         VMSTATE_UINT32_V(read_word_prev_offset, lan9118_state, 2),
 320         VMSTATE_UINT32_V(read_word_n, lan9118_state, 2),
 321         VMSTATE_UINT32_V(read_long, lan9118_state, 2),
 322         VMSTATE_UINT32_V(mode_16bit, lan9118_state, 2),
 323         VMSTATE_END_OF_LIST()
 324     }
 325 };
 326
 327 static void lan9118_update(lan9118_state *s)
 328 {
 329     int level;
 330
 331     /* TODO: Implement FIFO level IRQs.  */
 332     level = (s->int_sts & s->int_en) != 0;
 333     if (level) {
 334         s->irq_cfg |= IRQ_INT;
 335     } else {
 336         s->irq_cfg &= ~IRQ_INT;
 337     }
 338     if ((s->irq_cfg & IRQ_EN) == 0) {
 339         level = 0;
 340     }
 341     if ((s->irq_cfg & (IRQ_TYPE | IRQ_POL)) != (IRQ_TYPE | IRQ_POL)) {
 342         /* Interrupt is active low unless we're configured as
 343          * active-high polarity, push-pull type.
 344          */
 345         level = !level;
 346     }
 347     qemu_set_irq(s->irq, level);
 348 }
 349
 350 static void lan9118_mac_changed(lan9118_state *s)
 351 {
 352     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 353 }
 354
 355 static void lan9118_reload_eeprom(lan9118_state *s)
 356 {
 357     int i;
 358     if (s->eeprom[0] != 0xa5) {
 359         s->e2p_cmd &= ~E2P_CMD_MAC_ADDR_LOADED;
 360         DPRINTF("MACADDR load failed\n");
 361         return;
 362     }
 363     for (i = 0; i < 6; i++) {
 364         s->conf.macaddr.a[i] = s->eeprom[i + 1];
 365     }
 366     s->e2p_cmd |= E2P_CMD_MAC_ADDR_LOADED;
 367     DPRINTF("MACADDR loaded from eeprom\n");
 368     lan9118_mac_changed(s);
 369 }
 370
 371 static void phy_update_irq(lan9118_state *s)
 372 {
 373     if (s->phy_int & s->phy_int_mask) {
 374         s->int_sts |= PHY_INT;
 375     } else {
 376         s->int_sts &= ~PHY_INT;
 377     }
 378     lan9118_update(s);
 379 }
 380
 381 static void phy_update_link(lan9118_state *s)
 382 {
 383     /* Autonegotiation status mirrors link status.  */
 384     if (qemu_get_queue(s->nic)->link_down) {
 385         s->phy_status &= ~0x0024;
 386         s->phy_int |= PHY_INT_DOWN;
 387     } else {
 388         s->phy_status |= 0x0024;
 389         s->phy_int |= PHY_INT_ENERGYON;
 390         s->phy_int |= PHY_INT_AUTONEG_COMPLETE;
 391     }
 392     phy_update_irq(s);
 393 }
 394
 395 static void lan9118_set_link(NetClientState *nc)
 396 {
 397     phy_update_link(qemu_get_nic_opaque(nc));
 398 }
 399
 400 static void phy_reset(lan9118_state *s)
 401 {
 402     s->phy_status = 0x7809;
 403     s->phy_control = 0x3000;
 404     s->phy_advertise = 0x01e1;
 405     s->phy_int_mask = 0;
 406     s->phy_int = 0;
 407     phy_update_link(s);
 408 }
 409
 410 static void lan9118_reset(DeviceState *d)
 411 {
 412     lan9118_state *s = LAN9118(d);
 413
 414     s->irq_cfg &= (IRQ_TYPE | IRQ_POL);
 415     s->int_sts = 0;
 416     s->int_en = 0;
 417     s->fifo_int = 0x48000000;
 418     s->rx_cfg = 0;
 419     s->tx_cfg = 0;
 420     s->hw_cfg = s->mode_16bit ? 0x00050000 : 0x00050004;
 421     s->pmt_ctrl &= 0x45;
 422     s->gpio_cfg = 0;
 423     s->txp->fifo_used = 0;
 424     s->txp->state = TX_IDLE;
 425     s->txp->cmd_a = 0xffffffffu;
 426     s->txp->cmd_b = 0xffffffffu;
 427     s->txp->len = 0;
 428     s->txp->fifo_used = 0;
 429     s->tx_fifo_size = 4608;
 430     s->tx_status_fifo_used = 0;
 431     s->rx_status_fifo_size = 704;
 432     s->rx_fifo_size = 2640;
 433     s->rx_fifo_used = 0;
 434     s->rx_status_fifo_size = 176;
 435     s->rx_status_fifo_used = 0;
 436     s->rxp_offset = 0;
 437     s->rxp_size = 0;
 438     s->rxp_pad = 0;
 439     s->rx_packet_size_tail = s->rx_packet_size_head;
 440     s->rx_packet_size[s->rx_packet_size_head] = 0;
 441     s->mac_cmd = 0;
 442     s->mac_data = 0;
 443     s->afc_cfg = 0;
 444     s->e2p_cmd = 0;
 445     s->e2p_data = 0;
 446     s->free_timer_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40;
 447
 448     ptimer_stop(s->timer);
 449     ptimer_set_count(s->timer, 0xffff);
 450     s->gpt_cfg = 0xffff;
 451
 452     s->mac_cr = MAC_CR_PRMS;
 453     s->mac_hashh = 0;
 454     s->mac_hashl = 0;
 455     s->mac_mii_acc = 0;
 456     s->mac_mii_data = 0;
 457     s->mac_flow = 0;
 458
 459     s->read_word_n = 0;
 460     s->write_word_n = 0;
 461
 462     phy_reset(s);
 463
 464     s->eeprom_writable = 0;
 465     lan9118_reload_eeprom(s);
 466 }
 467
 468 static void rx_fifo_push(lan9118_state *s, uint32_t val)
 469 {
 470     int fifo_pos;
 471     fifo_pos = s->rx_fifo_head + s->rx_fifo_used;
 472     if (fifo_pos >= s->rx_fifo_size)
 473       fifo_pos -= s->rx_fifo_size;
 474     s->rx_fifo[fifo_pos] = val;
 475     s->rx_fifo_used++;
 476 }
 477
 478 /* Return nonzero if the packet is accepted by the filter.  */
 479 static int lan9118_filter(lan9118_state *s, const uint8_t *addr)
 480 {
 481     int multicast;
 482     uint32_t hash;
 483
 484     if (s->mac_cr & MAC_CR_PRMS) {
 485         return 1;
 486     }
 487     if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
 488         addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
 489         return (s->mac_cr & MAC_CR_BCAST) == 0;
 490     }
 491
 492     multicast = addr[0] & 1;
 493     if (multicast &&s->mac_cr & MAC_CR_MCPAS) {
 494         return 1;
 495     }
 496     if (multicast ? (s->mac_cr & MAC_CR_HPFILT) == 0
 497                   : (s->mac_cr & MAC_CR_HO) == 0) {
 498         /* Exact matching.  */
 499         hash = memcmp(addr, s->conf.macaddr.a, 6);
 500         if (s->mac_cr & MAC_CR_INVFILT) {
 501             return hash != 0;
 502         } else {
 503             return hash == 0;
 504         }
 505     } else {
 506         /* Hash matching  */
 507         hash = compute_mcast_idx(addr);
 508         if (hash & 0x20) {
 509             return (s->mac_hashh >> (hash & 0x1f)) & 1;
 510         } else {
 511             return (s->mac_hashl >> (hash & 0x1f)) & 1;
 512         }
 513     }
 514 }
 515
 516 static ssize_t lan9118_receive(NetClientState *nc, const uint8_t *buf,
 517                                size_t size)
 518 {
 519     lan9118_state *s = qemu_get_nic_opaque(nc);
 520     int fifo_len;
 521     int offset;
 522     int src_pos;
 523     int n;
 524     int filter;
 525     uint32_t val;
 526     uint32_t crc;
 527     uint32_t status;
 528
 529     if ((s->mac_cr & MAC_CR_RXEN) == 0) {
 530         return -1;
 531     }
 532
 533     if (size >= 2048 || size < 14) {
 534         return -1;
 535     }
 536
 537     /* TODO: Implement FIFO overflow notification.  */
 538     if (s->rx_status_fifo_used == s->rx_status_fifo_size) {
 539         return -1;
 540     }
 541
 542     filter = lan9118_filter(s, buf);
 543     if (!filter && (s->mac_cr & MAC_CR_RXALL) == 0) {
 544         return size;
 545     }
 546
 547     offset = (s->rx_cfg >> 8) & 0x1f;
 548     n = offset & 3;
 549     fifo_len = (size + n + 3) >> 2;
 550     /* Add a word for the CRC.  */
 551     fifo_len++;
 552     if (s->rx_fifo_size - s->rx_fifo_used < fifo_len) {
 553         return -1;
 554     }
 555
 556     DPRINTF("Got packet len:%d fifo:%d filter:%s\n",
 557             (int)size, fifo_len, filter ? "pass" : "fail");
 558     val = 0;
 559     crc = bswap32(crc32(~0, buf, size));
 560     for (src_pos = 0; src_pos < size; src_pos++) {
 561         val = (val >> 8) | ((uint32_t)buf[src_pos] << 24);
 562         n++;
 563         if (n == 4) {
 564             n = 0;
 565             rx_fifo_push(s, val);
 566             val = 0;
 567         }
 568     }
 569     if (n) {
 570         val >>= ((4 - n) * 8);
 571         val |= crc << (n * 8);
 572         rx_fifo_push(s, val);
 573         val = crc >> ((4 - n) * 8);
 574         rx_fifo_push(s, val);
 575     } else {
 576         rx_fifo_push(s, crc);
 577     }
 578     n = s->rx_status_fifo_head + s->rx_status_fifo_used;
 579     if (n >= s->rx_status_fifo_size) {
 580         n -= s->rx_status_fifo_size;
 581     }
 582     s->rx_packet_size[s->rx_packet_size_tail] = fifo_len;
 583     s->rx_packet_size_tail = (s->rx_packet_size_tail + 1023) & 1023;
 584     s->rx_status_fifo_used++;
 585
 586     status = (size + 4) << 16;
 587     if (buf[0] == 0xff && buf[1] == 0xff && buf[2] == 0xff &&
 588         buf[3] == 0xff && buf[4] == 0xff && buf[5] == 0xff) {
 589         status |= 0x00002000;
 590     } else if (buf[0] & 1) {
 591         status |= 0x00000400;
 592     }
 593     if (!filter) {
 594         status |= 0x40000000;
 595     }
 596     s->rx_status_fifo[n] = status;
 597
 598     if (s->rx_status_fifo_used > (s->fifo_int & 0xff)) {
 599         s->int_sts |= RSFL_INT;
 600     }
 601     lan9118_update(s);
 602
 603     return size;
 604 }
 605
 606 static uint32_t rx_fifo_pop(lan9118_state *s)
 607 {
 608     int n;
 609     uint32_t val;
 610
 611     if (s->rxp_size == 0 && s->rxp_pad == 0) {
 612         s->rxp_size = s->rx_packet_size[s->rx_packet_size_head];
 613         s->rx_packet_size[s->rx_packet_size_head] = 0;
 614         if (s->rxp_size != 0) {
 615             s->rx_packet_size_head = (s->rx_packet_size_head + 1023) & 1023;
 616             s->rxp_offset = (s->rx_cfg >> 10) & 7;
 617             n = s->rxp_offset + s->rxp_size;
 618             switch (s->rx_cfg >> 30) {
 619             case 1:
 620                 n = (-n) & 3;
 621                 break;
 622             case 2:
 623                 n = (-n) & 7;
 624                 break;
 625             default:
 626                 n = 0;
 627                 break;
 628             }
 629             s->rxp_pad = n;
 630             DPRINTF("Pop packet size:%d offset:%d pad: %d\n",
 631                     s->rxp_size, s->rxp_offset, s->rxp_pad);
 632         }
 633     }
 634     if (s->rxp_offset > 0) {
 635         s->rxp_offset--;
 636         val = 0;
 637     } else if (s->rxp_size > 0) {
 638         s->rxp_size--;
 639         val = s->rx_fifo[s->rx_fifo_head++];
 640         if (s->rx_fifo_head >= s->rx_fifo_size) {
 641             s->rx_fifo_head -= s->rx_fifo_size;
 642         }
 643         s->rx_fifo_used--;
 644     } else if (s->rxp_pad > 0) {
 645         s->rxp_pad--;
 646         val =  0;
 647     } else {
 648         DPRINTF("RX underflow\n");
 649         s->int_sts |= RXE_INT;
 650         val =  0;
 651     }
 652     lan9118_update(s);
 653     return val;
 654 }
 655
 656 static void do_tx_packet(lan9118_state *s)
 657 {
 658     int n;
 659     uint32_t status;
 660
 661     /* FIXME: Honor TX disable, and allow queueing of packets.  */
 662     if (s->phy_control & 0x4000)  {
 663         /* This assumes the receive routine doesn't touch the VLANClient.  */
 664         lan9118_receive(qemu_get_queue(s->nic), s->txp->data, s->txp->len);
 665     } else {
 666         qemu_send_packet(qemu_get_queue(s->nic), s->txp->data, s->txp->len);
 667     }
 668     s->txp->fifo_used = 0;
 669
 670     if (s->tx_status_fifo_used == 512) {
 671         /* Status FIFO full */
 672         return;
 673     }
 674     /* Add entry to status FIFO.  */
 675     status = s->txp->cmd_b & 0xffff0000u;
 676     DPRINTF("Sent packet tag:%04x len %d\n", status >> 16, s->txp->len);
 677     n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
 678     s->tx_status_fifo[n] = status;
 679     s->tx_status_fifo_used++;
 680     if (s->tx_status_fifo_used == 512) {
 681         s->int_sts |= TSFF_INT;
 682         /* TODO: Stop transmission.  */
 683     }
 684 }
 685
 686 static uint32_t rx_status_fifo_pop(lan9118_state *s)
 687 {
 688     uint32_t val;
 689
 690     val = s->rx_status_fifo[s->rx_status_fifo_head];
 691     if (s->rx_status_fifo_used != 0) {
 692         s->rx_status_fifo_used--;
 693         s->rx_status_fifo_head++;
 694         if (s->rx_status_fifo_head >= s->rx_status_fifo_size) {
 695             s->rx_status_fifo_head -= s->rx_status_fifo_size;
 696         }
 697         /* ??? What value should be returned when the FIFO is empty?  */
 698         DPRINTF("RX status pop 0x%08x\n", val);
 699     }
 700     return val;
 701 }
 702
 703 static uint32_t tx_status_fifo_pop(lan9118_state *s)
 704 {
 705     uint32_t val;
 706
 707     val = s->tx_status_fifo[s->tx_status_fifo_head];
 708     if (s->tx_status_fifo_used != 0) {
 709         s->tx_status_fifo_used--;
 710         s->tx_status_fifo_head = (s->tx_status_fifo_head + 1) & 511;
 711         /* ??? What value should be returned when the FIFO is empty?  */
 712     }
 713     return val;
 714 }
 715
 716 static void tx_fifo_push(lan9118_state *s, uint32_t val)
 717 {
 718     int n;
 719
 720     if (s->txp->fifo_used == s->tx_fifo_size) {
 721         s->int_sts |= TDFO_INT;
 722         return;
 723     }
 724     switch (s->txp->state) {
 725     case TX_IDLE:
 726         s->txp->cmd_a = val & 0x831f37ff;
 727         s->txp->fifo_used++;
 728         s->txp->state = TX_B;
 729         s->txp->buffer_size = extract32(s->txp->cmd_a, 0, 11);
 730         s->txp->offset = extract32(s->txp->cmd_a, 16, 5);
 731         break;
 732     case TX_B:
 733         if (s->txp->cmd_a & 0x2000) {
 734             /* First segment */
 735             s->txp->cmd_b = val;
 736             s->txp->fifo_used++;
 737             /* End alignment does not include command words.  */
 738             n = (s->txp->buffer_size + s->txp->offset + 3) >> 2;
 739             switch ((n >> 24) & 3) {
 740             case 1:
 741                 n = (-n) & 3;
 742                 break;
 743             case 2:
 744                 n = (-n) & 7;
 745                 break;
 746             default:
 747                 n = 0;
 748             }
 749             s->txp->pad = n;
 750             s->txp->len = 0;
 751         }
 752         DPRINTF("Block len:%d offset:%d pad:%d cmd %08x\n",
 753                 s->txp->buffer_size, s->txp->offset, s->txp->pad,
 754                 s->txp->cmd_a);
 755         s->txp->state = TX_DATA;
 756         break;
 757     case TX_DATA:
 758         if (s->txp->offset >= 4) {
 759             s->txp->offset -= 4;
 760             break;
 761         }
 762         if (s->txp->buffer_size <= 0 && s->txp->pad != 0) {
 763             s->txp->pad--;
 764         } else {
 765             n = MIN(4, s->txp->buffer_size + s->txp->offset);
 766             while (s->txp->offset) {
 767                 val >>= 8;
 768                 n--;
 769                 s->txp->offset--;
 770             }
 771             /* Documentation is somewhat unclear on the ordering of bytes
 772                in FIFO words.  Empirical results show it to be little-endian.
 773                */
 774             /* TODO: FIFO overflow checking.  */
 775             while (n--) {
 776                 s->txp->data[s->txp->len] = val & 0xff;
 777                 s->txp->len++;
 778                 val >>= 8;
 779                 s->txp->buffer_size--;
 780             }
 781             s->txp->fifo_used++;
 782         }
 783         if (s->txp->buffer_size <= 0 && s->txp->pad == 0) {
 784             if (s->txp->cmd_a & 0x1000) {
 785                 do_tx_packet(s);
 786             }
 787             if (s->txp->cmd_a & 0x80000000) {
 788                 s->int_sts |= TX_IOC_INT;
 789             }
 790             s->txp->state = TX_IDLE;
 791         }
 792         break;
 793     }
 794 }
 795
 796 static uint32_t do_phy_read(lan9118_state *s, int reg)
 797 {
 798     uint32_t val;
 799
 800     switch (reg) {
 801     case 0: /* Basic Control */
 802         return s->phy_control;
 803     case 1: /* Basic Status */
 804         return s->phy_status;
 805     case 2: /* ID1 */
 806         return 0x0007;
 807     case 3: /* ID2 */
 808         return 0xc0d1;
 809     case 4: /* Auto-neg advertisement */
 810         return s->phy_advertise;
 811     case 5: /* Auto-neg Link Partner Ability */
 812         return 0x0f71;
 813     case 6: /* Auto-neg Expansion */
 814         return 1;
 815         /* TODO 17, 18, 27, 29, 30, 31 */
 816     case 29: /* Interrupt source.  */
 817         val = s->phy_int;
 818         s->phy_int = 0;
 819         phy_update_irq(s);
 820         return val;
 821     case 30: /* Interrupt mask */
 822         return s->phy_int_mask;
 823     default:
 824         BADF("PHY read reg %d\n", reg);
 825         return 0;
 826     }
 827 }
 828
 829 static void do_phy_write(lan9118_state *s, int reg, uint32_t val)
 830 {
 831     switch (reg) {
 832     case 0: /* Basic Control */
 833         if (val & 0x8000) {
 834             phy_reset(s);
 835             break;
 836         }
 837         s->phy_control = val & 0x7980;
 838         /* Complete autonegotiation immediately.  */
 839         if (val & 0x1000) {
 840             s->phy_status |= 0x0020;
 841         }
 842         break;
 843     case 4: /* Auto-neg advertisement */
 844         s->phy_advertise = (val & 0x2d7f) | 0x80;
 845         break;
 846         /* TODO 17, 18, 27, 31 */
 847     case 30: /* Interrupt mask */
 848         s->phy_int_mask = val & 0xff;
 849         phy_update_irq(s);
 850         break;
 851     default:
 852         BADF("PHY write reg %d = 0x%04x\n", reg, val);
 853     }
 854 }
 855
 856 static void do_mac_write(lan9118_state *s, int reg, uint32_t val)
 857 {
 858     switch (reg) {
 859     case MAC_CR:
 860         if ((s->mac_cr & MAC_CR_RXEN) != 0 && (val & MAC_CR_RXEN) == 0) {
 861             s->int_sts |= RXSTOP_INT;
 862         }
 863         s->mac_cr = val & ~MAC_CR_RESERVED;
 864         DPRINTF("MAC_CR: %08x\n", val);
 865         break;
 866     case MAC_ADDRH:
 867         s->conf.macaddr.a[4] = val & 0xff;
 868         s->conf.macaddr.a[5] = (val >> 8) & 0xff;
 869         lan9118_mac_changed(s);
 870         break;
 871     case MAC_ADDRL:
 872         s->conf.macaddr.a[0] = val & 0xff;
 873         s->conf.macaddr.a[1] = (val >> 8) & 0xff;
 874         s->conf.macaddr.a[2] = (val >> 16) & 0xff;
 875         s->conf.macaddr.a[3] = (val >> 24) & 0xff;
 876         lan9118_mac_changed(s);
 877         break;
 878     case MAC_HASHH:
 879         s->mac_hashh = val;
 880         break;
 881     case MAC_HASHL:
 882         s->mac_hashl = val;
 883         break;
 884     case MAC_MII_ACC:
 885         s->mac_mii_acc = val & 0xffc2;
 886         if (val & 2) {
 887             DPRINTF("PHY write %d = 0x%04x\n",
 888                     (val >> 6) & 0x1f, s->mac_mii_data);
 889             do_phy_write(s, (val >> 6) & 0x1f, s->mac_mii_data);
 890         } else {
 891             s->mac_mii_data = do_phy_read(s, (val >> 6) & 0x1f);
 892             DPRINTF("PHY read %d = 0x%04x\n",
 893                     (val >> 6) & 0x1f, s->mac_mii_data);
 894         }
 895         break;
 896     case MAC_MII_DATA:
 897         s->mac_mii_data = val & 0xffff;
 898         break;
 899     case MAC_FLOW:
 900         s->mac_flow = val & 0xffff0000;
 901         break;
 902     case MAC_VLAN1:
 903         /* Writing to this register changes a condition for
 904          * FrameTooLong bit in rx_status.  Since we do not set
 905          * FrameTooLong anyway, just ignore write to this.
 906          */
 907         break;
 908     default:
 909         qemu_log_mask(LOG_GUEST_ERROR,
 910                       "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         qemu_log_mask(LOG_GUEST_ERROR,
 939                       "lan9118: Unimplemented MAC register read: %d\n",
 940                  s->mac_cmd & 0xf);
 941         return 0;
 942     }
 943 }
 944
 945 static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
 946 {
 947     s->e2p_cmd = (s->e2p_cmd & E2P_CMD_MAC_ADDR_LOADED) | (cmd << 28) | addr;
 948     switch (cmd) {
 949     case 0:
 950         s->e2p_data = s->eeprom[addr];
 951         DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
 952         break;
 953     case 1:
 954         s->eeprom_writable = 0;
 955         DPRINTF("EEPROM Write Disable\n");
 956         break;
 957     case 2: /* EWEN */
 958         s->eeprom_writable = 1;
 959         DPRINTF("EEPROM Write Enable\n");
 960         break;
 961     case 3: /* WRITE */
 962         if (s->eeprom_writable) {
 963             s->eeprom[addr] &= s->e2p_data;
 964             DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
 965         } else {
 966             DPRINTF("EEPROM Write %d (ignored)\n", addr);
 967         }
 968         break;
 969     case 4: /* WRAL */
 970         if (s->eeprom_writable) {
 971             for (addr = 0; addr < 128; addr++) {
 972                 s->eeprom[addr] &= s->e2p_data;
 973             }
 974             DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
 975         } else {
 976             DPRINTF("EEPROM Write All (ignored)\n");
 977         }
 978         break;
 979     case 5: /* ERASE */
 980         if (s->eeprom_writable) {
 981             s->eeprom[addr] = 0xff;
 982             DPRINTF("EEPROM Erase %d\n", addr);
 983         } else {
 984             DPRINTF("EEPROM Erase %d (ignored)\n", addr);
 985         }
 986         break;
 987     case 6: /* ERAL */
 988         if (s->eeprom_writable) {
 989             memset(s->eeprom, 0xff, 128);
 990             DPRINTF("EEPROM Erase All\n");
 991         } else {
 992             DPRINTF("EEPROM Erase All (ignored)\n");
 993         }
 994         break;
 995     case 7: /* RELOAD */
 996         lan9118_reload_eeprom(s);
 997         break;
 998     }
 999 }
1000
1001 static void lan9118_tick(void *opaque)
1002 {
1003     lan9118_state *s = (lan9118_state *)opaque;
1004     if (s->int_en & GPT_INT) {
1005         s->int_sts |= GPT_INT;
1006     }
1007     lan9118_update(s);
1008 }
1009
1010 static void lan9118_writel(void *opaque, hwaddr offset,
1011                            uint64_t val, unsigned size)
1012 {
1013     lan9118_state *s = (lan9118_state *)opaque;
1014     offset &= 0xff;
1015
1016     //DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
1017     if (offset >= 0x20 && offset < 0x40) {
1018         /* TX FIFO */
1019         tx_fifo_push(s, val);
1020         return;
1021     }
1022     switch (offset) {
1023     case CSR_IRQ_CFG:
1024         /* TODO: Implement interrupt deassertion intervals.  */
1025         val &= (IRQ_EN | IRQ_POL | IRQ_TYPE);
1026         s->irq_cfg = (s->irq_cfg & IRQ_INT) | val;
1027         break;
1028     case CSR_INT_STS:
1029         s->int_sts &= ~val;
1030         break;
1031     case CSR_INT_EN:
1032         s->int_en = val & ~RESERVED_INT;
1033         s->int_sts |= val & SW_INT;
1034         break;
1035     case CSR_FIFO_INT:
1036         DPRINTF("FIFO INT levels %08x\n", val);
1037         s->fifo_int = val;
1038         break;
1039     case CSR_RX_CFG:
1040         if (val & 0x8000) {
1041             /* RX_DUMP */
1042             s->rx_fifo_used = 0;
1043             s->rx_status_fifo_used = 0;
1044             s->rx_packet_size_tail = s->rx_packet_size_head;
1045             s->rx_packet_size[s->rx_packet_size_head] = 0;
1046         }
1047         s->rx_cfg = val & 0xcfff1ff0;
1048         break;
1049     case CSR_TX_CFG:
1050         if (val & 0x8000) {
1051             s->tx_status_fifo_used = 0;
1052         }
1053         if (val & 0x4000) {
1054             s->txp->state = TX_IDLE;
1055             s->txp->fifo_used = 0;
1056             s->txp->cmd_a = 0xffffffff;
1057         }
1058         s->tx_cfg = val & 6;
1059         break;
1060     case CSR_HW_CFG:
1061         if (val & 1) {
1062             /* SRST */
1063             lan9118_reset(DEVICE(s));
1064         } else {
1065             s->hw_cfg = (val & 0x003f300) | (s->hw_cfg & 0x4);
1066         }
1067         break;
1068     case CSR_RX_DP_CTRL:
1069         if (val & 0x80000000) {
1070             /* Skip forward to next packet.  */
1071             s->rxp_pad = 0;
1072             s->rxp_offset = 0;
1073             if (s->rxp_size == 0) {
1074                 /* Pop a word to start the next packet.  */
1075                 rx_fifo_pop(s);
1076                 s->rxp_pad = 0;
1077                 s->rxp_offset = 0;
1078             }
1079             s->rx_fifo_head += s->rxp_size;
1080             if (s->rx_fifo_head >= s->rx_fifo_size) {
1081                 s->rx_fifo_head -= s->rx_fifo_size;
1082             }
1083         }
1084         break;
1085     case CSR_PMT_CTRL:
1086         if (val & 0x400) {
1087             phy_reset(s);
1088         }
1089         s->pmt_ctrl &= ~0x34e;
1090         s->pmt_ctrl |= (val & 0x34e);
1091         break;
1092     case CSR_GPIO_CFG:
1093         /* Probably just enabling LEDs.  */
1094         s->gpio_cfg = val & 0x7777071f;
1095         break;
1096     case CSR_GPT_CFG:
1097         if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
1098             if (val & GPT_TIMER_EN) {
1099                 ptimer_set_count(s->timer, val & 0xffff);
1100                 ptimer_run(s->timer, 0);
1101             } else {
1102                 ptimer_stop(s->timer);
1103                 ptimer_set_count(s->timer, 0xffff);
1104             }
1105         }
1106         s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
1107         break;
1108     case CSR_WORD_SWAP:
1109         /* Ignored because we're in 32-bit mode.  */
1110         s->word_swap = val;
1111         break;
1112     case CSR_MAC_CSR_CMD:
1113         s->mac_cmd = val & 0x4000000f;
1114         if (val & 0x80000000) {
1115             if (val & 0x40000000) {
1116                 s->mac_data = do_mac_read(s, val & 0xf);
1117                 DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data);
1118             } else {
1119                 DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data);
1120                 do_mac_write(s, val & 0xf, s->mac_data);
1121             }
1122         }
1123         break;
1124     case CSR_MAC_CSR_DATA:
1125         s->mac_data = val;
1126         break;
1127     case CSR_AFC_CFG:
1128         s->afc_cfg = val & 0x00ffffff;
1129         break;
1130     case CSR_E2P_CMD:
1131         lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0x7f);
1132         break;
1133     case CSR_E2P_DATA:
1134         s->e2p_data = val & 0xff;
1135         break;
1136
1137     default:
1138         qemu_log_mask(LOG_GUEST_ERROR, "lan9118_write: Bad reg 0x%x = %x\n",
1139                       (int)offset, (int)val);
1140         break;
1141     }
1142     lan9118_update(s);
1143 }
1144
1145 static void lan9118_writew(void *opaque, hwaddr offset,
1146                            uint32_t val)
1147 {
1148     lan9118_state *s = (lan9118_state *)opaque;
1149     offset &= 0xff;
1150
1151     if (s->write_word_prev_offset != (offset & ~0x3)) {
1152         /* New offset, reset word counter */
1153         s->write_word_n = 0;
1154         s->write_word_prev_offset = offset & ~0x3;
1155     }
1156
1157     if (offset & 0x2) {
1158         s->write_word_h = val;
1159     } else {
1160         s->write_word_l = val;
1161     }
1162
1163     //DPRINTF("Writew reg 0x%02x = 0x%08x\n", (int)offset, val);
1164     s->write_word_n++;
1165     if (s->write_word_n == 2) {
1166         s->write_word_n = 0;
1167         lan9118_writel(s, offset & ~3, s->write_word_l +
1168                 (s->write_word_h << 16), 4);
1169     }
1170 }
1171
1172 static void lan9118_16bit_mode_write(void *opaque, hwaddr offset,
1173                                      uint64_t val, unsigned size)
1174 {
1175     switch (size) {
1176     case 2:
1177         lan9118_writew(opaque, offset, (uint32_t)val);
1178         return;
1179     case 4:
1180         lan9118_writel(opaque, offset, val, size);
1181         return;
1182     }
1183
1184     hw_error("lan9118_write: Bad size 0x%x\n", size);
1185 }
1186
1187 static uint64_t lan9118_readl(void *opaque, hwaddr offset,
1188                               unsigned size)
1189 {
1190     lan9118_state *s = (lan9118_state *)opaque;
1191
1192     //DPRINTF("Read reg 0x%02x\n", (int)offset);
1193     if (offset < 0x20) {
1194         /* RX FIFO */
1195         return rx_fifo_pop(s);
1196     }
1197     switch (offset) {
1198     case 0x40:
1199         return rx_status_fifo_pop(s);
1200     case 0x44:
1201         return s->rx_status_fifo[s->tx_status_fifo_head];
1202     case 0x48:
1203         return tx_status_fifo_pop(s);
1204     case 0x4c:
1205         return s->tx_status_fifo[s->tx_status_fifo_head];
1206     case CSR_ID_REV:
1207         return 0x01180001;
1208     case CSR_IRQ_CFG:
1209         return s->irq_cfg;
1210     case CSR_INT_STS:
1211         return s->int_sts;
1212     case CSR_INT_EN:
1213         return s->int_en;
1214     case CSR_BYTE_TEST:
1215         return 0x87654321;
1216     case CSR_FIFO_INT:
1217         return s->fifo_int;
1218     case CSR_RX_CFG:
1219         return s->rx_cfg;
1220     case CSR_TX_CFG:
1221         return s->tx_cfg;
1222     case CSR_HW_CFG:
1223         return s->hw_cfg;
1224     case CSR_RX_DP_CTRL:
1225         return 0;
1226     case CSR_RX_FIFO_INF:
1227         return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2);
1228     case CSR_TX_FIFO_INF:
1229         return (s->tx_status_fifo_used << 16)
1230                | (s->tx_fifo_size - s->txp->fifo_used);
1231     case CSR_PMT_CTRL:
1232         return s->pmt_ctrl;
1233     case CSR_GPIO_CFG:
1234         return s->gpio_cfg;
1235     case CSR_GPT_CFG:
1236         return s->gpt_cfg;
1237     case CSR_GPT_CNT:
1238         return ptimer_get_count(s->timer);
1239     case CSR_WORD_SWAP:
1240         return s->word_swap;
1241     case CSR_FREE_RUN:
1242         return (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40) - s->free_timer_start;
1243     case CSR_RX_DROP:
1244         /* TODO: Implement dropped frames counter.  */
1245         return 0;
1246     case CSR_MAC_CSR_CMD:
1247         return s->mac_cmd;
1248     case CSR_MAC_CSR_DATA:
1249         return s->mac_data;
1250     case CSR_AFC_CFG:
1251         return s->afc_cfg;
1252     case CSR_E2P_CMD:
1253         return s->e2p_cmd;
1254     case CSR_E2P_DATA:
1255         return s->e2p_data;
1256     }
1257     qemu_log_mask(LOG_GUEST_ERROR, "lan9118_read: Bad reg 0x%x\n", (int)offset);
1258     return 0;
1259 }
1260
1261 static uint32_t lan9118_readw(void *opaque, hwaddr offset)
1262 {
1263     lan9118_state *s = (lan9118_state *)opaque;
1264     uint32_t val;
1265
1266     if (s->read_word_prev_offset != (offset & ~0x3)) {
1267         /* New offset, reset word counter */
1268         s->read_word_n = 0;
1269         s->read_word_prev_offset = offset & ~0x3;
1270     }
1271
1272     s->read_word_n++;
1273     if (s->read_word_n == 1) {
1274         s->read_long = lan9118_readl(s, offset & ~3, 4);
1275     } else {
1276         s->read_word_n = 0;
1277     }
1278
1279     if (offset & 2) {
1280         val = s->read_long >> 16;
1281     } else {
1282         val = s->read_long & 0xFFFF;
1283     }
1284
1285     //DPRINTF("Readw reg 0x%02x, val 0x%x\n", (int)offset, val);
1286     return val;
1287 }
1288
1289 static uint64_t lan9118_16bit_mode_read(void *opaque, hwaddr offset,
1290                                         unsigned size)
1291 {
1292     switch (size) {
1293     case 2:
1294         return lan9118_readw(opaque, offset);
1295     case 4:
1296         return lan9118_readl(opaque, offset, size);
1297     }
1298
1299     hw_error("lan9118_read: Bad size 0x%x\n", size);
1300     return 0;
1301 }
1302
1303 static const MemoryRegionOps lan9118_mem_ops = {
1304     .read = lan9118_readl,
1305     .write = lan9118_writel,
1306     .endianness = DEVICE_NATIVE_ENDIAN,
1307 };
1308
1309 static const MemoryRegionOps lan9118_16bit_mem_ops = {
1310     .read = lan9118_16bit_mode_read,
1311     .write = lan9118_16bit_mode_write,
1312     .endianness = DEVICE_NATIVE_ENDIAN,
1313 };
1314
1315 static NetClientInfo net_lan9118_info = {
1316     .type = NET_CLIENT_DRIVER_NIC,
1317     .size = sizeof(NICState),
1318     .receive = lan9118_receive,
1319     .link_status_changed = lan9118_set_link,
1320 };
1321
1322 static int lan9118_init1(SysBusDevice *sbd)
1323 {
1324     DeviceState *dev = DEVICE(sbd);
1325     lan9118_state *s = LAN9118(dev);
1326     QEMUBH *bh;
1327     int i;
1328     const MemoryRegionOps *mem_ops =
1329             s->mode_16bit ? &lan9118_16bit_mem_ops : &lan9118_mem_ops;
1330
1331     memory_region_init_io(&s->mmio, OBJECT(dev), mem_ops, s,
1332                           "lan9118-mmio", 0x100);
1333     sysbus_init_mmio(sbd, &s->mmio);
1334     sysbus_init_irq(sbd, &s->irq);
1335     qemu_macaddr_default_if_unset(&s->conf.macaddr);
1336
1337     s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1338                           object_get_typename(OBJECT(dev)), dev->id, s);
1339     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1340     s->eeprom[0] = 0xa5;
1341     for (i = 0; i < 6; i++) {
1342         s->eeprom[i + 1] = s->conf.macaddr.a[i];
1343     }
1344     s->pmt_ctrl = 1;
1345     s->txp = &s->tx_packet;
1346
1347     bh = qemu_bh_new(lan9118_tick, s);
1348     s->timer = ptimer_init(bh, PTIMER_POLICY_DEFAULT);
1349     ptimer_set_freq(s->timer, 10000);
1350     ptimer_set_limit(s->timer, 0xffff, 1);
1351
1352     return 0;
1353 }
1354
1355 static Property lan9118_properties[] = {
1356     DEFINE_NIC_PROPERTIES(lan9118_state, conf),
1357     DEFINE_PROP_UINT32("mode_16bit", lan9118_state, mode_16bit, 0),
1358     DEFINE_PROP_END_OF_LIST(),
1359 };
1360
1361 static void lan9118_class_init(ObjectClass *klass, void *data)
1362 {
1363     DeviceClass *dc = DEVICE_CLASS(klass);
1364     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1365
1366     k->init = lan9118_init1;
1367     dc->reset = lan9118_reset;
1368     dc->props = lan9118_properties;
1369     dc->vmsd = &vmstate_lan9118;
1370 }
1371
1372 static const TypeInfo lan9118_info = {
1373     .name          = TYPE_LAN9118,
1374     .parent        = TYPE_SYS_BUS_DEVICE,
1375     .instance_size = sizeof(lan9118_state),
1376     .class_init    = lan9118_class_init,
1377 };
1378
1379 static void lan9118_register_types(void)
1380 {
1381     type_register_static(&lan9118_info);
1382 }
1383
1384 /* Legacy helper function.  Should go away when machine config files are
1385    implemented.  */
1386 void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1387 {
1388     DeviceState *dev;
1389     SysBusDevice *s;
1390
1391     qemu_check_nic_model(nd, "lan9118");
1392     dev = qdev_create(NULL, TYPE_LAN9118);
1393     qdev_set_nic_properties(dev, nd);
1394     qdev_init_nofail(dev);
1395     s = SYS_BUS_DEVICE(dev);
1396     sysbus_mmio_map(s, 0, base);
1397     sysbus_connect_irq(s, 0, irq);
1398 }
1399
1400 type_init(lan9118_register_types)