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 "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, ...) \
  27do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  28#define BADF(fmt, ...) \
  29do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  30#else
  31#define DPRINTF(fmt, ...) do {} while(0)
  32#define BADF(fmt, ...) \
  33do { 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
 140enum tx_state {
 141    TX_IDLE,
 142    TX_B,
 143    TX_DATA
 144};
 145
 146typedef 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
 159static 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
 180typedef 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
 258static 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
 327static 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
 350static 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
 355static 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
 371static 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
 381static 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
 395static void lan9118_set_link(NetClientState *nc)
 396{
 397    phy_update_link(qemu_get_nic_opaque(nc));
 398}
 399
 400static 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
 410static 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
 468static 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.  */
 479static 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
 516static 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
 606static 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
 656static 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
 686static 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
 703static 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
 716static 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
 796static 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
 829static 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
 856static 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
 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        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
 945static 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
1001static 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
1010static 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
1145static 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
1172static 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
1187static 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
1261static 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
1289static 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
1303static const MemoryRegionOps lan9118_mem_ops = {
1304    .read = lan9118_readl,
1305    .write = lan9118_writel,
1306    .endianness = DEVICE_NATIVE_ENDIAN,
1307};
1308
1309static 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
1315static NetClientInfo net_lan9118_info = {
1316    .type = NET_CLIENT_OPTIONS_KIND_NIC,
1317    .size = sizeof(NICState),
1318    .receive = lan9118_receive,
1319    .link_status_changed = lan9118_set_link,
1320};
1321
1322static 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);
1349    ptimer_set_freq(s->timer, 10000);
1350    ptimer_set_limit(s->timer, 0xffff, 1);
1351
1352    return 0;
1353}
1354
1355static 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
1361static 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
1372static 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
1379static 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.  */
1386void 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
1400type_init(lan9118_register_types)
1401