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 "qemu/osdep.h"
  14#include "hw/sysbus.h"
  15#include "net/net.h"
  16#include "net/eth.h"
  17#include "hw/devices.h"
  18#include "sysemu/sysemu.h"
  19#include "hw/ptimer.h"
  20#include "qemu/log.h"
  21/* For crc32 */
  22#include <zlib.h>
  23
  24//#define DEBUG_LAN9118
  25
  26#ifdef DEBUG_LAN9118
  27#define DPRINTF(fmt, ...) \
  28do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  29#define BADF(fmt, ...) \
  30do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  31#else
  32#define DPRINTF(fmt, ...) do {} while(0)
  33#define BADF(fmt, ...) \
  34do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  35#endif
  36
  37#define CSR_ID_REV      0x50
  38#define CSR_IRQ_CFG     0x54
  39#define CSR_INT_STS     0x58
  40#define CSR_INT_EN      0x5c
  41#define CSR_BYTE_TEST   0x64
  42#define CSR_FIFO_INT    0x68
  43#define CSR_RX_CFG      0x6c
  44#define CSR_TX_CFG      0x70
  45#define CSR_HW_CFG      0x74
  46#define CSR_RX_DP_CTRL  0x78
  47#define CSR_RX_FIFO_INF 0x7c
  48#define CSR_TX_FIFO_INF 0x80
  49#define CSR_PMT_CTRL    0x84
  50#define CSR_GPIO_CFG    0x88
  51#define CSR_GPT_CFG     0x8c
  52#define CSR_GPT_CNT     0x90
  53#define CSR_WORD_SWAP   0x98
  54#define CSR_FREE_RUN    0x9c
  55#define CSR_RX_DROP     0xa0
  56#define CSR_MAC_CSR_CMD 0xa4
  57#define CSR_MAC_CSR_DATA 0xa8
  58#define CSR_AFC_CFG     0xac
  59#define CSR_E2P_CMD     0xb0
  60#define CSR_E2P_DATA    0xb4
  61
  62#define E2P_CMD_MAC_ADDR_LOADED 0x100
  63
  64/* IRQ_CFG */
  65#define IRQ_INT         0x00001000
  66#define IRQ_EN          0x00000100
  67#define IRQ_POL         0x00000010
  68#define IRQ_TYPE        0x00000001
  69
  70/* INT_STS/INT_EN */
  71#define SW_INT          0x80000000
  72#define TXSTOP_INT      0x02000000
  73#define RXSTOP_INT      0x01000000
  74#define RXDFH_INT       0x00800000
  75#define TX_IOC_INT      0x00200000
  76#define RXD_INT         0x00100000
  77#define GPT_INT         0x00080000
  78#define PHY_INT         0x00040000
  79#define PME_INT         0x00020000
  80#define TXSO_INT        0x00010000
  81#define RWT_INT         0x00008000
  82#define RXE_INT         0x00004000
  83#define TXE_INT         0x00002000
  84#define TDFU_INT        0x00000800
  85#define TDFO_INT        0x00000400
  86#define TDFA_INT        0x00000200
  87#define TSFF_INT        0x00000100
  88#define TSFL_INT        0x00000080
  89#define RXDF_INT        0x00000040
  90#define RDFL_INT        0x00000020
  91#define RSFF_INT        0x00000010
  92#define RSFL_INT        0x00000008
  93#define GPIO2_INT       0x00000004
  94#define GPIO1_INT       0x00000002
  95#define GPIO0_INT       0x00000001
  96#define RESERVED_INT    0x7c001000
  97
  98#define MAC_CR          1
  99#define MAC_ADDRH       2
 100#define MAC_ADDRL       3
 101#define MAC_HASHH       4
 102#define MAC_HASHL       5
 103#define MAC_MII_ACC     6
 104#define MAC_MII_DATA    7
 105#define MAC_FLOW        8
 106#define MAC_VLAN1       9 /* TODO */
 107#define MAC_VLAN2       10 /* TODO */
 108#define MAC_WUFF        11 /* TODO */
 109#define MAC_WUCSR       12 /* TODO */
 110
 111#define MAC_CR_RXALL    0x80000000
 112#define MAC_CR_RCVOWN   0x00800000
 113#define MAC_CR_LOOPBK   0x00200000
 114#define MAC_CR_FDPX     0x00100000
 115#define MAC_CR_MCPAS    0x00080000
 116#define MAC_CR_PRMS     0x00040000
 117#define MAC_CR_INVFILT  0x00020000
 118#define MAC_CR_PASSBAD  0x00010000
 119#define MAC_CR_HO       0x00008000
 120#define MAC_CR_HPFILT   0x00002000
 121#define MAC_CR_LCOLL    0x00001000
 122#define MAC_CR_BCAST    0x00000800
 123#define MAC_CR_DISRTY   0x00000400
 124#define MAC_CR_PADSTR   0x00000100
 125#define MAC_CR_BOLMT    0x000000c0
 126#define MAC_CR_DFCHK    0x00000020
 127#define MAC_CR_TXEN     0x00000008
 128#define MAC_CR_RXEN     0x00000004
 129#define MAC_CR_RESERVED 0x7f404213
 130
 131#define PHY_INT_ENERGYON            0x80
 132#define PHY_INT_AUTONEG_COMPLETE    0x40
 133#define PHY_INT_FAULT               0x20
 134#define PHY_INT_DOWN                0x10
 135#define PHY_INT_AUTONEG_LP          0x08
 136#define PHY_INT_PARFAULT            0x04
 137#define PHY_INT_AUTONEG_PAGE        0x02
 138
 139#define GPT_TIMER_EN    0x20000000
 140
 141enum tx_state {
 142    TX_IDLE,
 143    TX_B,
 144    TX_DATA
 145};
 146
 147typedef struct {
 148    /* state is a tx_state but we can't put enums in VMStateDescriptions. */
 149    uint32_t state;
 150    uint32_t cmd_a;
 151    uint32_t cmd_b;
 152    int32_t buffer_size;
 153    int32_t offset;
 154    int32_t pad;
 155    int32_t fifo_used;
 156    int32_t len;
 157    uint8_t data[2048];
 158} LAN9118Packet;
 159
 160static const VMStateDescription vmstate_lan9118_packet = {
 161    .name = "lan9118_packet",
 162    .version_id = 1,
 163    .minimum_version_id = 1,
 164    .fields = (VMStateField[]) {
 165        VMSTATE_UINT32(state, LAN9118Packet),
 166        VMSTATE_UINT32(cmd_a, LAN9118Packet),
 167        VMSTATE_UINT32(cmd_b, LAN9118Packet),
 168        VMSTATE_INT32(buffer_size, LAN9118Packet),
 169        VMSTATE_INT32(offset, LAN9118Packet),
 170        VMSTATE_INT32(pad, LAN9118Packet),
 171        VMSTATE_INT32(fifo_used, LAN9118Packet),
 172        VMSTATE_INT32(len, LAN9118Packet),
 173        VMSTATE_UINT8_ARRAY(data, LAN9118Packet, 2048),
 174        VMSTATE_END_OF_LIST()
 175    }
 176};
 177
 178#define TYPE_LAN9118 "lan9118"
 179#define LAN9118(obj) OBJECT_CHECK(lan9118_state, (obj), TYPE_LAN9118)
 180
 181typedef struct {
 182    SysBusDevice parent_obj;
 183
 184    NICState *nic;
 185    NICConf conf;
 186    qemu_irq irq;
 187    MemoryRegion mmio;
 188    ptimer_state *timer;
 189
 190    uint32_t irq_cfg;
 191    uint32_t int_sts;
 192    uint32_t int_en;
 193    uint32_t fifo_int;
 194    uint32_t rx_cfg;
 195    uint32_t tx_cfg;
 196    uint32_t hw_cfg;
 197    uint32_t pmt_ctrl;
 198    uint32_t gpio_cfg;
 199    uint32_t gpt_cfg;
 200    uint32_t word_swap;
 201    uint32_t free_timer_start;
 202    uint32_t mac_cmd;
 203    uint32_t mac_data;
 204    uint32_t afc_cfg;
 205    uint32_t e2p_cmd;
 206    uint32_t e2p_data;
 207
 208    uint32_t mac_cr;
 209    uint32_t mac_hashh;
 210    uint32_t mac_hashl;
 211    uint32_t mac_mii_acc;
 212    uint32_t mac_mii_data;
 213    uint32_t mac_flow;
 214
 215    uint32_t phy_status;
 216    uint32_t phy_control;
 217    uint32_t phy_advertise;
 218    uint32_t phy_int;
 219    uint32_t phy_int_mask;
 220
 221    int32_t eeprom_writable;
 222    uint8_t eeprom[128];
 223
 224    int32_t tx_fifo_size;
 225    LAN9118Packet *txp;
 226    LAN9118Packet tx_packet;
 227
 228    int32_t tx_status_fifo_used;
 229    int32_t tx_status_fifo_head;
 230    uint32_t tx_status_fifo[512];
 231
 232    int32_t rx_status_fifo_size;
 233    int32_t rx_status_fifo_used;
 234    int32_t rx_status_fifo_head;
 235    uint32_t rx_status_fifo[896];
 236    int32_t rx_fifo_size;
 237    int32_t rx_fifo_used;
 238    int32_t rx_fifo_head;
 239    uint32_t rx_fifo[3360];
 240    int32_t rx_packet_size_head;
 241    int32_t rx_packet_size_tail;
 242    int32_t rx_packet_size[1024];
 243
 244    int32_t rxp_offset;
 245    int32_t rxp_size;
 246    int32_t rxp_pad;
 247
 248    uint32_t write_word_prev_offset;
 249    uint32_t write_word_n;
 250    uint16_t write_word_l;
 251    uint16_t write_word_h;
 252    uint32_t read_word_prev_offset;
 253    uint32_t read_word_n;
 254    uint32_t read_long;
 255
 256    uint32_t mode_16bit;
 257} lan9118_state;
 258
 259static const VMStateDescription vmstate_lan9118 = {
 260    .name = "lan9118",
 261    .version_id = 2,
 262    .minimum_version_id = 1,
 263    .fields = (VMStateField[]) {
 264        VMSTATE_PTIMER(timer, lan9118_state),
 265        VMSTATE_UINT32(irq_cfg, lan9118_state),
 266        VMSTATE_UINT32(int_sts, lan9118_state),
 267        VMSTATE_UINT32(int_en, lan9118_state),
 268        VMSTATE_UINT32(fifo_int, lan9118_state),
 269        VMSTATE_UINT32(rx_cfg, lan9118_state),
 270        VMSTATE_UINT32(tx_cfg, lan9118_state),
 271        VMSTATE_UINT32(hw_cfg, lan9118_state),
 272        VMSTATE_UINT32(pmt_ctrl, lan9118_state),
 273        VMSTATE_UINT32(gpio_cfg, lan9118_state),
 274        VMSTATE_UINT32(gpt_cfg, lan9118_state),
 275        VMSTATE_UINT32(word_swap, lan9118_state),
 276        VMSTATE_UINT32(free_timer_start, lan9118_state),
 277        VMSTATE_UINT32(mac_cmd, lan9118_state),
 278        VMSTATE_UINT32(mac_data, lan9118_state),
 279        VMSTATE_UINT32(afc_cfg, lan9118_state),
 280        VMSTATE_UINT32(e2p_cmd, lan9118_state),
 281        VMSTATE_UINT32(e2p_data, lan9118_state),
 282        VMSTATE_UINT32(mac_cr, lan9118_state),
 283        VMSTATE_UINT32(mac_hashh, lan9118_state),
 284        VMSTATE_UINT32(mac_hashl, lan9118_state),
 285        VMSTATE_UINT32(mac_mii_acc, lan9118_state),
 286        VMSTATE_UINT32(mac_mii_data, lan9118_state),
 287        VMSTATE_UINT32(mac_flow, lan9118_state),
 288        VMSTATE_UINT32(phy_status, lan9118_state),
 289        VMSTATE_UINT32(phy_control, lan9118_state),
 290        VMSTATE_UINT32(phy_advertise, lan9118_state),
 291        VMSTATE_UINT32(phy_int, lan9118_state),
 292        VMSTATE_UINT32(phy_int_mask, lan9118_state),
 293        VMSTATE_INT32(eeprom_writable, lan9118_state),
 294        VMSTATE_UINT8_ARRAY(eeprom, lan9118_state, 128),
 295        VMSTATE_INT32(tx_fifo_size, lan9118_state),
 296        /* txp always points at tx_packet so need not be saved */
 297        VMSTATE_STRUCT(tx_packet, lan9118_state, 0,
 298                       vmstate_lan9118_packet, LAN9118Packet),
 299        VMSTATE_INT32(tx_status_fifo_used, lan9118_state),
 300        VMSTATE_INT32(tx_status_fifo_head, lan9118_state),
 301        VMSTATE_UINT32_ARRAY(tx_status_fifo, lan9118_state, 512),
 302        VMSTATE_INT32(rx_status_fifo_size, lan9118_state),
 303        VMSTATE_INT32(rx_status_fifo_used, lan9118_state),
 304        VMSTATE_INT32(rx_status_fifo_head, lan9118_state),
 305        VMSTATE_UINT32_ARRAY(rx_status_fifo, lan9118_state, 896),
 306        VMSTATE_INT32(rx_fifo_size, lan9118_state),
 307        VMSTATE_INT32(rx_fifo_used, lan9118_state),
 308        VMSTATE_INT32(rx_fifo_head, lan9118_state),
 309        VMSTATE_UINT32_ARRAY(rx_fifo, lan9118_state, 3360),
 310        VMSTATE_INT32(rx_packet_size_head, lan9118_state),
 311        VMSTATE_INT32(rx_packet_size_tail, lan9118_state),
 312        VMSTATE_INT32_ARRAY(rx_packet_size, lan9118_state, 1024),
 313        VMSTATE_INT32(rxp_offset, lan9118_state),
 314        VMSTATE_INT32(rxp_size, lan9118_state),
 315        VMSTATE_INT32(rxp_pad, lan9118_state),
 316        VMSTATE_UINT32_V(write_word_prev_offset, lan9118_state, 2),
 317        VMSTATE_UINT32_V(write_word_n, lan9118_state, 2),
 318        VMSTATE_UINT16_V(write_word_l, lan9118_state, 2),
 319        VMSTATE_UINT16_V(write_word_h, lan9118_state, 2),
 320        VMSTATE_UINT32_V(read_word_prev_offset, lan9118_state, 2),
 321        VMSTATE_UINT32_V(read_word_n, lan9118_state, 2),
 322        VMSTATE_UINT32_V(read_long, lan9118_state, 2),
 323        VMSTATE_UINT32_V(mode_16bit, lan9118_state, 2),
 324        VMSTATE_END_OF_LIST()
 325    }
 326};
 327
 328static void lan9118_update(lan9118_state *s)
 329{
 330    int level;
 331
 332    /* TODO: Implement FIFO level IRQs.  */
 333    level = (s->int_sts & s->int_en) != 0;
 334    if (level) {
 335        s->irq_cfg |= IRQ_INT;
 336    } else {
 337        s->irq_cfg &= ~IRQ_INT;
 338    }
 339    if ((s->irq_cfg & IRQ_EN) == 0) {
 340        level = 0;
 341    }
 342    if ((s->irq_cfg & (IRQ_TYPE | IRQ_POL)) != (IRQ_TYPE | IRQ_POL)) {
 343        /* Interrupt is active low unless we're configured as
 344         * active-high polarity, push-pull type.
 345         */
 346        level = !level;
 347    }
 348    qemu_set_irq(s->irq, level);
 349}
 350
 351static void lan9118_mac_changed(lan9118_state *s)
 352{
 353    qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 354}
 355
 356static void lan9118_reload_eeprom(lan9118_state *s)
 357{
 358    int i;
 359    if (s->eeprom[0] != 0xa5) {
 360        s->e2p_cmd &= ~E2P_CMD_MAC_ADDR_LOADED;
 361        DPRINTF("MACADDR load failed\n");
 362        return;
 363    }
 364    for (i = 0; i < 6; i++) {
 365        s->conf.macaddr.a[i] = s->eeprom[i + 1];
 366    }
 367    s->e2p_cmd |= E2P_CMD_MAC_ADDR_LOADED;
 368    DPRINTF("MACADDR loaded from eeprom\n");
 369    lan9118_mac_changed(s);
 370}
 371
 372static void phy_update_irq(lan9118_state *s)
 373{
 374    if (s->phy_int & s->phy_int_mask) {
 375        s->int_sts |= PHY_INT;
 376    } else {
 377        s->int_sts &= ~PHY_INT;
 378    }
 379    lan9118_update(s);
 380}
 381
 382static void phy_update_link(lan9118_state *s)
 383{
 384    /* Autonegotiation status mirrors link status.  */
 385    if (qemu_get_queue(s->nic)->link_down) {
 386        s->phy_status &= ~0x0024;
 387        s->phy_int |= PHY_INT_DOWN;
 388    } else {
 389        s->phy_status |= 0x0024;
 390        s->phy_int |= PHY_INT_ENERGYON;
 391        s->phy_int |= PHY_INT_AUTONEG_COMPLETE;
 392    }
 393    phy_update_irq(s);
 394}
 395
 396static void lan9118_set_link(NetClientState *nc)
 397{
 398    phy_update_link(qemu_get_nic_opaque(nc));
 399}
 400
 401static void phy_reset(lan9118_state *s)
 402{
 403    s->phy_status = 0x7809;
 404    s->phy_control = 0x3000;
 405    s->phy_advertise = 0x01e1;
 406    s->phy_int_mask = 0;
 407    s->phy_int = 0;
 408    phy_update_link(s);
 409}
 410
 411static void lan9118_reset(DeviceState *d)
 412{
 413    lan9118_state *s = LAN9118(d);
 414
 415    s->irq_cfg &= (IRQ_TYPE | IRQ_POL);
 416    s->int_sts = 0;
 417    s->int_en = 0;
 418    s->fifo_int = 0x48000000;
 419    s->rx_cfg = 0;
 420    s->tx_cfg = 0;
 421    s->hw_cfg = s->mode_16bit ? 0x00050000 : 0x00050004;
 422    s->pmt_ctrl &= 0x45;
 423    s->gpio_cfg = 0;
 424    s->txp->fifo_used = 0;
 425    s->txp->state = TX_IDLE;
 426    s->txp->cmd_a = 0xffffffffu;
 427    s->txp->cmd_b = 0xffffffffu;
 428    s->txp->len = 0;
 429    s->txp->fifo_used = 0;
 430    s->tx_fifo_size = 4608;
 431    s->tx_status_fifo_used = 0;
 432    s->rx_status_fifo_size = 704;
 433    s->rx_fifo_size = 2640;
 434    s->rx_fifo_used = 0;
 435    s->rx_status_fifo_size = 176;
 436    s->rx_status_fifo_used = 0;
 437    s->rxp_offset = 0;
 438    s->rxp_size = 0;
 439    s->rxp_pad = 0;
 440    s->rx_packet_size_tail = s->rx_packet_size_head;
 441    s->rx_packet_size[s->rx_packet_size_head] = 0;
 442    s->mac_cmd = 0;
 443    s->mac_data = 0;
 444    s->afc_cfg = 0;
 445    s->e2p_cmd = 0;
 446    s->e2p_data = 0;
 447    s->free_timer_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40;
 448
 449    ptimer_stop(s->timer);
 450    ptimer_set_count(s->timer, 0xffff);
 451    s->gpt_cfg = 0xffff;
 452
 453    s->mac_cr = MAC_CR_PRMS;
 454    s->mac_hashh = 0;
 455    s->mac_hashl = 0;
 456    s->mac_mii_acc = 0;
 457    s->mac_mii_data = 0;
 458    s->mac_flow = 0;
 459
 460    s->read_word_n = 0;
 461    s->write_word_n = 0;
 462
 463    phy_reset(s);
 464
 465    s->eeprom_writable = 0;
 466    lan9118_reload_eeprom(s);
 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 = net_crc32(addr, ETH_ALEN) >> 26;
 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        qemu_log_mask(LOG_GUEST_ERROR,
 911                      "lan9118: Unimplemented MAC register write: %d = 0x%x\n",
 912                 s->mac_cmd & 0xf, val);
 913    }
 914}
 915
 916static uint32_t do_mac_read(lan9118_state *s, int reg)
 917{
 918    switch (reg) {
 919    case MAC_CR:
 920        return s->mac_cr;
 921    case MAC_ADDRH:
 922        return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8);
 923    case MAC_ADDRL:
 924        return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8)
 925               | (s->conf.macaddr.a[2] << 16) | (s->conf.macaddr.a[3] << 24);
 926    case MAC_HASHH:
 927        return s->mac_hashh;
 928        break;
 929    case MAC_HASHL:
 930        return s->mac_hashl;
 931        break;
 932    case MAC_MII_ACC:
 933        return s->mac_mii_acc;
 934    case MAC_MII_DATA:
 935        return s->mac_mii_data;
 936    case MAC_FLOW:
 937        return s->mac_flow;
 938    default:
 939        qemu_log_mask(LOG_GUEST_ERROR,
 940                      "lan9118: Unimplemented MAC register read: %d\n",
 941                 s->mac_cmd & 0xf);
 942        return 0;
 943    }
 944}
 945
 946static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
 947{
 948    s->e2p_cmd = (s->e2p_cmd & E2P_CMD_MAC_ADDR_LOADED) | (cmd << 28) | addr;
 949    switch (cmd) {
 950    case 0:
 951        s->e2p_data = s->eeprom[addr];
 952        DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
 953        break;
 954    case 1:
 955        s->eeprom_writable = 0;
 956        DPRINTF("EEPROM Write Disable\n");
 957        break;
 958    case 2: /* EWEN */
 959        s->eeprom_writable = 1;
 960        DPRINTF("EEPROM Write Enable\n");
 961        break;
 962    case 3: /* WRITE */
 963        if (s->eeprom_writable) {
 964            s->eeprom[addr] &= s->e2p_data;
 965            DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
 966        } else {
 967            DPRINTF("EEPROM Write %d (ignored)\n", addr);
 968        }
 969        break;
 970    case 4: /* WRAL */
 971        if (s->eeprom_writable) {
 972            for (addr = 0; addr < 128; addr++) {
 973                s->eeprom[addr] &= s->e2p_data;
 974            }
 975            DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
 976        } else {
 977            DPRINTF("EEPROM Write All (ignored)\n");
 978        }
 979        break;
 980    case 5: /* ERASE */
 981        if (s->eeprom_writable) {
 982            s->eeprom[addr] = 0xff;
 983            DPRINTF("EEPROM Erase %d\n", addr);
 984        } else {
 985            DPRINTF("EEPROM Erase %d (ignored)\n", addr);
 986        }
 987        break;
 988    case 6: /* ERAL */
 989        if (s->eeprom_writable) {
 990            memset(s->eeprom, 0xff, 128);
 991            DPRINTF("EEPROM Erase All\n");
 992        } else {
 993            DPRINTF("EEPROM Erase All (ignored)\n");
 994        }
 995        break;
 996    case 7: /* RELOAD */
 997        lan9118_reload_eeprom(s);
 998        break;
 999    }
1000}
1001
1002static void lan9118_tick(void *opaque)
1003{
1004    lan9118_state *s = (lan9118_state *)opaque;
1005    if (s->int_en & GPT_INT) {
1006        s->int_sts |= GPT_INT;
1007    }
1008    lan9118_update(s);
1009}
1010
1011static void lan9118_writel(void *opaque, hwaddr offset,
1012                           uint64_t val, unsigned size)
1013{
1014    lan9118_state *s = (lan9118_state *)opaque;
1015    offset &= 0xff;
1016
1017    //DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
1018    if (offset >= 0x20 && offset < 0x40) {
1019        /* TX FIFO */
1020        tx_fifo_push(s, val);
1021        return;
1022    }
1023    switch (offset) {
1024    case CSR_IRQ_CFG:
1025        /* TODO: Implement interrupt deassertion intervals.  */
1026        val &= (IRQ_EN | IRQ_POL | IRQ_TYPE);
1027        s->irq_cfg = (s->irq_cfg & IRQ_INT) | val;
1028        break;
1029    case CSR_INT_STS:
1030        s->int_sts &= ~val;
1031        break;
1032    case CSR_INT_EN:
1033        s->int_en = val & ~RESERVED_INT;
1034        s->int_sts |= val & SW_INT;
1035        break;
1036    case CSR_FIFO_INT:
1037        DPRINTF("FIFO INT levels %08x\n", val);
1038        s->fifo_int = val;
1039        break;
1040    case CSR_RX_CFG:
1041        if (val & 0x8000) {
1042            /* RX_DUMP */
1043            s->rx_fifo_used = 0;
1044            s->rx_status_fifo_used = 0;
1045            s->rx_packet_size_tail = s->rx_packet_size_head;
1046            s->rx_packet_size[s->rx_packet_size_head] = 0;
1047        }
1048        s->rx_cfg = val & 0xcfff1ff0;
1049        break;
1050    case CSR_TX_CFG:
1051        if (val & 0x8000) {
1052            s->tx_status_fifo_used = 0;
1053        }
1054        if (val & 0x4000) {
1055            s->txp->state = TX_IDLE;
1056            s->txp->fifo_used = 0;
1057            s->txp->cmd_a = 0xffffffff;
1058        }
1059        s->tx_cfg = val & 6;
1060        break;
1061    case CSR_HW_CFG:
1062        if (val & 1) {
1063            /* SRST */
1064            lan9118_reset(DEVICE(s));
1065        } else {
1066            s->hw_cfg = (val & 0x003f300) | (s->hw_cfg & 0x4);
1067        }
1068        break;
1069    case CSR_RX_DP_CTRL:
1070        if (val & 0x80000000) {
1071            /* Skip forward to next packet.  */
1072            s->rxp_pad = 0;
1073            s->rxp_offset = 0;
1074            if (s->rxp_size == 0) {
1075                /* Pop a word to start the next packet.  */
1076                rx_fifo_pop(s);
1077                s->rxp_pad = 0;
1078                s->rxp_offset = 0;
1079            }
1080            s->rx_fifo_head += s->rxp_size;
1081            if (s->rx_fifo_head >= s->rx_fifo_size) {
1082                s->rx_fifo_head -= s->rx_fifo_size;
1083            }
1084        }
1085        break;
1086    case CSR_PMT_CTRL:
1087        if (val & 0x400) {
1088            phy_reset(s);
1089        }
1090        s->pmt_ctrl &= ~0x34e;
1091        s->pmt_ctrl |= (val & 0x34e);
1092        break;
1093    case CSR_GPIO_CFG:
1094        /* Probably just enabling LEDs.  */
1095        s->gpio_cfg = val & 0x7777071f;
1096        break;
1097    case CSR_GPT_CFG:
1098        if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
1099            if (val & GPT_TIMER_EN) {
1100                ptimer_set_count(s->timer, val & 0xffff);
1101                ptimer_run(s->timer, 0);
1102            } else {
1103                ptimer_stop(s->timer);
1104                ptimer_set_count(s->timer, 0xffff);
1105            }
1106        }
1107        s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
1108        break;
1109    case CSR_WORD_SWAP:
1110        /* Ignored because we're in 32-bit mode.  */
1111        s->word_swap = val;
1112        break;
1113    case CSR_MAC_CSR_CMD:
1114        s->mac_cmd = val & 0x4000000f;
1115        if (val & 0x80000000) {
1116            if (val & 0x40000000) {
1117                s->mac_data = do_mac_read(s, val & 0xf);
1118                DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data);
1119            } else {
1120                DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data);
1121                do_mac_write(s, val & 0xf, s->mac_data);
1122            }
1123        }
1124        break;
1125    case CSR_MAC_CSR_DATA:
1126        s->mac_data = val;
1127        break;
1128    case CSR_AFC_CFG:
1129        s->afc_cfg = val & 0x00ffffff;
1130        break;
1131    case CSR_E2P_CMD:
1132        lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0x7f);
1133        break;
1134    case CSR_E2P_DATA:
1135        s->e2p_data = val & 0xff;
1136        break;
1137
1138    default:
1139        qemu_log_mask(LOG_GUEST_ERROR, "lan9118_write: Bad reg 0x%x = %x\n",
1140                      (int)offset, (int)val);
1141        break;
1142    }
1143    lan9118_update(s);
1144}
1145
1146static void lan9118_writew(void *opaque, hwaddr offset,
1147                           uint32_t val)
1148{
1149    lan9118_state *s = (lan9118_state *)opaque;
1150    offset &= 0xff;
1151
1152    if (s->write_word_prev_offset != (offset & ~0x3)) {
1153        /* New offset, reset word counter */
1154        s->write_word_n = 0;
1155        s->write_word_prev_offset = offset & ~0x3;
1156    }
1157
1158    if (offset & 0x2) {
1159        s->write_word_h = val;
1160    } else {
1161        s->write_word_l = val;
1162    }
1163
1164    //DPRINTF("Writew reg 0x%02x = 0x%08x\n", (int)offset, val);
1165    s->write_word_n++;
1166    if (s->write_word_n == 2) {
1167        s->write_word_n = 0;
1168        lan9118_writel(s, offset & ~3, s->write_word_l +
1169                (s->write_word_h << 16), 4);
1170    }
1171}
1172
1173static void lan9118_16bit_mode_write(void *opaque, hwaddr offset,
1174                                     uint64_t val, unsigned size)
1175{
1176    switch (size) {
1177    case 2:
1178        lan9118_writew(opaque, offset, (uint32_t)val);
1179        return;
1180    case 4:
1181        lan9118_writel(opaque, offset, val, size);
1182        return;
1183    }
1184
1185    hw_error("lan9118_write: Bad size 0x%x\n", size);
1186}
1187
1188static uint64_t lan9118_readl(void *opaque, hwaddr offset,
1189                              unsigned size)
1190{
1191    lan9118_state *s = (lan9118_state *)opaque;
1192
1193    //DPRINTF("Read reg 0x%02x\n", (int)offset);
1194    if (offset < 0x20) {
1195        /* RX FIFO */
1196        return rx_fifo_pop(s);
1197    }
1198    switch (offset) {
1199    case 0x40:
1200        return rx_status_fifo_pop(s);
1201    case 0x44:
1202        return s->rx_status_fifo[s->tx_status_fifo_head];
1203    case 0x48:
1204        return tx_status_fifo_pop(s);
1205    case 0x4c:
1206        return s->tx_status_fifo[s->tx_status_fifo_head];
1207    case CSR_ID_REV:
1208        return 0x01180001;
1209    case CSR_IRQ_CFG:
1210        return s->irq_cfg;
1211    case CSR_INT_STS:
1212        return s->int_sts;
1213    case CSR_INT_EN:
1214        return s->int_en;
1215    case CSR_BYTE_TEST:
1216        return 0x87654321;
1217    case CSR_FIFO_INT:
1218        return s->fifo_int;
1219    case CSR_RX_CFG:
1220        return s->rx_cfg;
1221    case CSR_TX_CFG:
1222        return s->tx_cfg;
1223    case CSR_HW_CFG:
1224        return s->hw_cfg;
1225    case CSR_RX_DP_CTRL:
1226        return 0;
1227    case CSR_RX_FIFO_INF:
1228        return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2);
1229    case CSR_TX_FIFO_INF:
1230        return (s->tx_status_fifo_used << 16)
1231               | (s->tx_fifo_size - s->txp->fifo_used);
1232    case CSR_PMT_CTRL:
1233        return s->pmt_ctrl;
1234    case CSR_GPIO_CFG:
1235        return s->gpio_cfg;
1236    case CSR_GPT_CFG:
1237        return s->gpt_cfg;
1238    case CSR_GPT_CNT:
1239        return ptimer_get_count(s->timer);
1240    case CSR_WORD_SWAP:
1241        return s->word_swap;
1242    case CSR_FREE_RUN:
1243        return (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40) - s->free_timer_start;
1244    case CSR_RX_DROP:
1245        /* TODO: Implement dropped frames counter.  */
1246        return 0;
1247    case CSR_MAC_CSR_CMD:
1248        return s->mac_cmd;
1249    case CSR_MAC_CSR_DATA:
1250        return s->mac_data;
1251    case CSR_AFC_CFG:
1252        return s->afc_cfg;
1253    case CSR_E2P_CMD:
1254        return s->e2p_cmd;
1255    case CSR_E2P_DATA:
1256        return s->e2p_data;
1257    }
1258    qemu_log_mask(LOG_GUEST_ERROR, "lan9118_read: Bad reg 0x%x\n", (int)offset);
1259    return 0;
1260}
1261
1262static uint32_t lan9118_readw(void *opaque, hwaddr offset)
1263{
1264    lan9118_state *s = (lan9118_state *)opaque;
1265    uint32_t val;
1266
1267    if (s->read_word_prev_offset != (offset & ~0x3)) {
1268        /* New offset, reset word counter */
1269        s->read_word_n = 0;
1270        s->read_word_prev_offset = offset & ~0x3;
1271    }
1272
1273    s->read_word_n++;
1274    if (s->read_word_n == 1) {
1275        s->read_long = lan9118_readl(s, offset & ~3, 4);
1276    } else {
1277        s->read_word_n = 0;
1278    }
1279
1280    if (offset & 2) {
1281        val = s->read_long >> 16;
1282    } else {
1283        val = s->read_long & 0xFFFF;
1284    }
1285
1286    //DPRINTF("Readw reg 0x%02x, val 0x%x\n", (int)offset, val);
1287    return val;
1288}
1289
1290static uint64_t lan9118_16bit_mode_read(void *opaque, hwaddr offset,
1291                                        unsigned size)
1292{
1293    switch (size) {
1294    case 2:
1295        return lan9118_readw(opaque, offset);
1296    case 4:
1297        return lan9118_readl(opaque, offset, size);
1298    }
1299
1300    hw_error("lan9118_read: Bad size 0x%x\n", size);
1301    return 0;
1302}
1303
1304static const MemoryRegionOps lan9118_mem_ops = {
1305    .read = lan9118_readl,
1306    .write = lan9118_writel,
1307    .endianness = DEVICE_NATIVE_ENDIAN,
1308};
1309
1310static const MemoryRegionOps lan9118_16bit_mem_ops = {
1311    .read = lan9118_16bit_mode_read,
1312    .write = lan9118_16bit_mode_write,
1313    .endianness = DEVICE_NATIVE_ENDIAN,
1314};
1315
1316static NetClientInfo net_lan9118_info = {
1317    .type = NET_CLIENT_DRIVER_NIC,
1318    .size = sizeof(NICState),
1319    .receive = lan9118_receive,
1320    .link_status_changed = lan9118_set_link,
1321};
1322
1323static void lan9118_realize(DeviceState *dev, Error **errp)
1324{
1325    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
1326    lan9118_state *s = LAN9118(dev);
1327    QEMUBH *bh;
1328    int i;
1329    const MemoryRegionOps *mem_ops =
1330            s->mode_16bit ? &lan9118_16bit_mem_ops : &lan9118_mem_ops;
1331
1332    memory_region_init_io(&s->mmio, OBJECT(dev), mem_ops, s,
1333                          "lan9118-mmio", 0x100);
1334    sysbus_init_mmio(sbd, &s->mmio);
1335    sysbus_init_irq(sbd, &s->irq);
1336    qemu_macaddr_default_if_unset(&s->conf.macaddr);
1337
1338    s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1339                          object_get_typename(OBJECT(dev)), dev->id, s);
1340    qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1341    s->eeprom[0] = 0xa5;
1342    for (i = 0; i < 6; i++) {
1343        s->eeprom[i + 1] = s->conf.macaddr.a[i];
1344    }
1345    s->pmt_ctrl = 1;
1346    s->txp = &s->tx_packet;
1347
1348    bh = qemu_bh_new(lan9118_tick, s);
1349    s->timer = ptimer_init(bh, PTIMER_POLICY_DEFAULT);
1350    ptimer_set_freq(s->timer, 10000);
1351    ptimer_set_limit(s->timer, 0xffff, 1);
1352}
1353
1354static Property lan9118_properties[] = {
1355    DEFINE_NIC_PROPERTIES(lan9118_state, conf),
1356    DEFINE_PROP_UINT32("mode_16bit", lan9118_state, mode_16bit, 0),
1357    DEFINE_PROP_END_OF_LIST(),
1358};
1359
1360static void lan9118_class_init(ObjectClass *klass, void *data)
1361{
1362    DeviceClass *dc = DEVICE_CLASS(klass);
1363
1364    dc->reset = lan9118_reset;
1365    dc->props = lan9118_properties;
1366    dc->vmsd = &vmstate_lan9118;
1367    dc->realize = lan9118_realize;
1368}
1369
1370static const TypeInfo lan9118_info = {
1371    .name          = TYPE_LAN9118,
1372    .parent        = TYPE_SYS_BUS_DEVICE,
1373    .instance_size = sizeof(lan9118_state),
1374    .class_init    = lan9118_class_init,
1375};
1376
1377static void lan9118_register_types(void)
1378{
1379    type_register_static(&lan9118_info);
1380}
1381
1382/* Legacy helper function.  Should go away when machine config files are
1383   implemented.  */
1384void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1385{
1386    DeviceState *dev;
1387    SysBusDevice *s;
1388
1389    qemu_check_nic_model(nd, "lan9118");
1390    dev = qdev_create(NULL, TYPE_LAN9118);
1391    qdev_set_nic_properties(dev, nd);
1392    qdev_init_nofail(dev);
1393    s = SYS_BUS_DEVICE(dev);
1394    sysbus_mmio_map(s, 0, base);
1395    sysbus_connect_irq(s, 0, irq);
1396}
1397
1398type_init(lan9118_register_types)
1399