qemu/hw/net/lan9118.c
<<
>>
Prefs
   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, ...) \
  25do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  26#define BADF(fmt, ...) \
  27do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  28#else
  29#define DPRINTF(fmt, ...) do {} while(0)
  30#define BADF(fmt, ...) \
  31do { 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
 136enum tx_state {
 137    TX_IDLE,
 138    TX_B,
 139    TX_DATA
 140};
 141
 142typedef 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
 155static 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
 176typedef 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
 254static 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
 323static 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
 346static 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
 351static 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
 367static 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
 377static 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
 391static void lan9118_set_link(NetClientState *nc)
 392{
 393    phy_update_link(qemu_get_nic_opaque(nc));
 394}
 395
 396static 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
 406static 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
 464static int lan9118_can_receive(NetClientState *nc)
 465{
 466    return 1;
 467}
 468
 469static 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.  */
 480static 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
 517static 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
 607static 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
 657static 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
 687static 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
 704static 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
 717static 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
 797static 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
 830static 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
 857static 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
 915static 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
 943static 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
 999static 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
1008static 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
1142static 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
1169static 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
1184static 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
1258static 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
1286static 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
1300static const MemoryRegionOps lan9118_mem_ops = {
1301    .read = lan9118_readl,
1302    .write = lan9118_writel,
1303    .endianness = DEVICE_NATIVE_ENDIAN,
1304};
1305
1306static 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
1312static void lan9118_cleanup(NetClientState *nc)
1313{
1314    lan9118_state *s = qemu_get_nic_opaque(nc);
1315
1316    s->nic = NULL;
1317}
1318
1319static NetClientInfo net_lan9118_info = {
1320    .type = NET_CLIENT_OPTIONS_KIND_NIC,
1321    .size = sizeof(NICState),
1322    .can_receive = lan9118_can_receive,
1323    .receive = lan9118_receive,
1324    .cleanup = lan9118_cleanup,
1325    .link_status_changed = lan9118_set_link,
1326};
1327
1328static int lan9118_init1(SysBusDevice *sbd)
1329{
1330    DeviceState *dev = DEVICE(sbd);
1331    lan9118_state *s = LAN9118(dev);
1332    QEMUBH *bh;
1333    int i;
1334    const MemoryRegionOps *mem_ops =
1335            s->mode_16bit ? &lan9118_16bit_mem_ops : &lan9118_mem_ops;
1336
1337    memory_region_init_io(&s->mmio, OBJECT(dev), mem_ops, s,
1338                          "lan9118-mmio", 0x100);
1339    sysbus_init_mmio(sbd, &s->mmio);
1340    sysbus_init_irq(sbd, &s->irq);
1341    qemu_macaddr_default_if_unset(&s->conf.macaddr);
1342
1343    s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1344                          object_get_typename(OBJECT(dev)), dev->id, s);
1345    qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1346    s->eeprom[0] = 0xa5;
1347    for (i = 0; i < 6; i++) {
1348        s->eeprom[i + 1] = s->conf.macaddr.a[i];
1349    }
1350    s->pmt_ctrl = 1;
1351    s->txp = &s->tx_packet;
1352
1353    bh = qemu_bh_new(lan9118_tick, s);
1354    s->timer = ptimer_init(bh);
1355    ptimer_set_freq(s->timer, 10000);
1356    ptimer_set_limit(s->timer, 0xffff, 1);
1357
1358    return 0;
1359}
1360
1361static Property lan9118_properties[] = {
1362    DEFINE_NIC_PROPERTIES(lan9118_state, conf),
1363    DEFINE_PROP_UINT32("mode_16bit", lan9118_state, mode_16bit, 0),
1364    DEFINE_PROP_END_OF_LIST(),
1365};
1366
1367static void lan9118_class_init(ObjectClass *klass, void *data)
1368{
1369    DeviceClass *dc = DEVICE_CLASS(klass);
1370    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1371
1372    k->init = lan9118_init1;
1373    dc->reset = lan9118_reset;
1374    dc->props = lan9118_properties;
1375    dc->vmsd = &vmstate_lan9118;
1376}
1377
1378static const TypeInfo lan9118_info = {
1379    .name          = TYPE_LAN9118,
1380    .parent        = TYPE_SYS_BUS_DEVICE,
1381    .instance_size = sizeof(lan9118_state),
1382    .class_init    = lan9118_class_init,
1383};
1384
1385static void lan9118_register_types(void)
1386{
1387    type_register_static(&lan9118_info);
1388}
1389
1390/* Legacy helper function.  Should go away when machine config files are
1391   implemented.  */
1392void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1393{
1394    DeviceState *dev;
1395    SysBusDevice *s;
1396
1397    qemu_check_nic_model(nd, "lan9118");
1398    dev = qdev_create(NULL, TYPE_LAN9118);
1399    qdev_set_nic_properties(dev, nd);
1400    qdev_init_nofail(dev);
1401    s = SYS_BUS_DEVICE(dev);
1402    sysbus_mmio_map(s, 0, base);
1403    sysbus_connect_irq(s, 0, irq);
1404}
1405
1406type_init(lan9118_register_types)
1407