qemu/hw/lan9118.c
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   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 "sysbus.h"
  14#include "net.h"
  15#include "devices.h"
  16#include "sysemu.h"
  17#include "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
 173typedef struct {
 174    SysBusDevice busdev;
 175    NICState *nic;
 176    NICConf conf;
 177    qemu_irq irq;
 178    MemoryRegion mmio;
 179    ptimer_state *timer;
 180
 181    uint32_t irq_cfg;
 182    uint32_t int_sts;
 183    uint32_t int_en;
 184    uint32_t fifo_int;
 185    uint32_t rx_cfg;
 186    uint32_t tx_cfg;
 187    uint32_t hw_cfg;
 188    uint32_t pmt_ctrl;
 189    uint32_t gpio_cfg;
 190    uint32_t gpt_cfg;
 191    uint32_t word_swap;
 192    uint32_t free_timer_start;
 193    uint32_t mac_cmd;
 194    uint32_t mac_data;
 195    uint32_t afc_cfg;
 196    uint32_t e2p_cmd;
 197    uint32_t e2p_data;
 198
 199    uint32_t mac_cr;
 200    uint32_t mac_hashh;
 201    uint32_t mac_hashl;
 202    uint32_t mac_mii_acc;
 203    uint32_t mac_mii_data;
 204    uint32_t mac_flow;
 205
 206    uint32_t phy_status;
 207    uint32_t phy_control;
 208    uint32_t phy_advertise;
 209    uint32_t phy_int;
 210    uint32_t phy_int_mask;
 211
 212    int32_t eeprom_writable;
 213    uint8_t eeprom[128];
 214
 215    int32_t tx_fifo_size;
 216    LAN9118Packet *txp;
 217    LAN9118Packet tx_packet;
 218
 219    int32_t tx_status_fifo_used;
 220    int32_t tx_status_fifo_head;
 221    uint32_t tx_status_fifo[512];
 222
 223    int32_t rx_status_fifo_size;
 224    int32_t rx_status_fifo_used;
 225    int32_t rx_status_fifo_head;
 226    uint32_t rx_status_fifo[896];
 227    int32_t rx_fifo_size;
 228    int32_t rx_fifo_used;
 229    int32_t rx_fifo_head;
 230    uint32_t rx_fifo[3360];
 231    int32_t rx_packet_size_head;
 232    int32_t rx_packet_size_tail;
 233    int32_t rx_packet_size[1024];
 234
 235    int32_t rxp_offset;
 236    int32_t rxp_size;
 237    int32_t rxp_pad;
 238
 239    uint32_t write_word_prev_offset;
 240    uint32_t write_word_n;
 241    uint16_t write_word_l;
 242    uint16_t write_word_h;
 243    uint32_t read_word_prev_offset;
 244    uint32_t read_word_n;
 245    uint32_t read_long;
 246
 247    uint32_t mode_16bit;
 248} lan9118_state;
 249
 250static const VMStateDescription vmstate_lan9118 = {
 251    .name = "lan9118",
 252    .version_id = 2,
 253    .minimum_version_id = 1,
 254    .fields = (VMStateField[]) {
 255        VMSTATE_PTIMER(timer, lan9118_state),
 256        VMSTATE_UINT32(irq_cfg, lan9118_state),
 257        VMSTATE_UINT32(int_sts, lan9118_state),
 258        VMSTATE_UINT32(int_en, lan9118_state),
 259        VMSTATE_UINT32(fifo_int, lan9118_state),
 260        VMSTATE_UINT32(rx_cfg, lan9118_state),
 261        VMSTATE_UINT32(tx_cfg, lan9118_state),
 262        VMSTATE_UINT32(hw_cfg, lan9118_state),
 263        VMSTATE_UINT32(pmt_ctrl, lan9118_state),
 264        VMSTATE_UINT32(gpio_cfg, lan9118_state),
 265        VMSTATE_UINT32(gpt_cfg, lan9118_state),
 266        VMSTATE_UINT32(word_swap, lan9118_state),
 267        VMSTATE_UINT32(free_timer_start, lan9118_state),
 268        VMSTATE_UINT32(mac_cmd, lan9118_state),
 269        VMSTATE_UINT32(mac_data, lan9118_state),
 270        VMSTATE_UINT32(afc_cfg, lan9118_state),
 271        VMSTATE_UINT32(e2p_cmd, lan9118_state),
 272        VMSTATE_UINT32(e2p_data, lan9118_state),
 273        VMSTATE_UINT32(mac_cr, lan9118_state),
 274        VMSTATE_UINT32(mac_hashh, lan9118_state),
 275        VMSTATE_UINT32(mac_hashl, lan9118_state),
 276        VMSTATE_UINT32(mac_mii_acc, lan9118_state),
 277        VMSTATE_UINT32(mac_mii_data, lan9118_state),
 278        VMSTATE_UINT32(mac_flow, lan9118_state),
 279        VMSTATE_UINT32(phy_status, lan9118_state),
 280        VMSTATE_UINT32(phy_control, lan9118_state),
 281        VMSTATE_UINT32(phy_advertise, lan9118_state),
 282        VMSTATE_UINT32(phy_int, lan9118_state),
 283        VMSTATE_UINT32(phy_int_mask, lan9118_state),
 284        VMSTATE_INT32(eeprom_writable, lan9118_state),
 285        VMSTATE_UINT8_ARRAY(eeprom, lan9118_state, 128),
 286        VMSTATE_INT32(tx_fifo_size, lan9118_state),
 287        /* txp always points at tx_packet so need not be saved */
 288        VMSTATE_STRUCT(tx_packet, lan9118_state, 0,
 289                       vmstate_lan9118_packet, LAN9118Packet),
 290        VMSTATE_INT32(tx_status_fifo_used, lan9118_state),
 291        VMSTATE_INT32(tx_status_fifo_head, lan9118_state),
 292        VMSTATE_UINT32_ARRAY(tx_status_fifo, lan9118_state, 512),
 293        VMSTATE_INT32(rx_status_fifo_size, lan9118_state),
 294        VMSTATE_INT32(rx_status_fifo_used, lan9118_state),
 295        VMSTATE_INT32(rx_status_fifo_head, lan9118_state),
 296        VMSTATE_UINT32_ARRAY(rx_status_fifo, lan9118_state, 896),
 297        VMSTATE_INT32(rx_fifo_size, lan9118_state),
 298        VMSTATE_INT32(rx_fifo_used, lan9118_state),
 299        VMSTATE_INT32(rx_fifo_head, lan9118_state),
 300        VMSTATE_UINT32_ARRAY(rx_fifo, lan9118_state, 3360),
 301        VMSTATE_INT32(rx_packet_size_head, lan9118_state),
 302        VMSTATE_INT32(rx_packet_size_tail, lan9118_state),
 303        VMSTATE_INT32_ARRAY(rx_packet_size, lan9118_state, 1024),
 304        VMSTATE_INT32(rxp_offset, lan9118_state),
 305        VMSTATE_INT32(rxp_size, lan9118_state),
 306        VMSTATE_INT32(rxp_pad, lan9118_state),
 307        VMSTATE_UINT32_V(write_word_prev_offset, lan9118_state, 2),
 308        VMSTATE_UINT32_V(write_word_n, lan9118_state, 2),
 309        VMSTATE_UINT16_V(write_word_l, lan9118_state, 2),
 310        VMSTATE_UINT16_V(write_word_h, lan9118_state, 2),
 311        VMSTATE_UINT32_V(read_word_prev_offset, lan9118_state, 2),
 312        VMSTATE_UINT32_V(read_word_n, lan9118_state, 2),
 313        VMSTATE_UINT32_V(read_long, lan9118_state, 2),
 314        VMSTATE_UINT32_V(mode_16bit, lan9118_state, 2),
 315        VMSTATE_END_OF_LIST()
 316    }
 317};
 318
 319static void lan9118_update(lan9118_state *s)
 320{
 321    int level;
 322
 323    /* TODO: Implement FIFO level IRQs.  */
 324    level = (s->int_sts & s->int_en) != 0;
 325    if (level) {
 326        s->irq_cfg |= IRQ_INT;
 327    } else {
 328        s->irq_cfg &= ~IRQ_INT;
 329    }
 330    if ((s->irq_cfg & IRQ_EN) == 0) {
 331        level = 0;
 332    }
 333    if ((s->irq_cfg & (IRQ_TYPE | IRQ_POL)) != (IRQ_TYPE | IRQ_POL)) {
 334        /* Interrupt is active low unless we're configured as
 335         * active-high polarity, push-pull type.
 336         */
 337        level = !level;
 338    }
 339    qemu_set_irq(s->irq, level);
 340}
 341
 342static void lan9118_mac_changed(lan9118_state *s)
 343{
 344    qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
 345}
 346
 347static void lan9118_reload_eeprom(lan9118_state *s)
 348{
 349    int i;
 350    if (s->eeprom[0] != 0xa5) {
 351        s->e2p_cmd &= ~0x10;
 352        DPRINTF("MACADDR load failed\n");
 353        return;
 354    }
 355    for (i = 0; i < 6; i++) {
 356        s->conf.macaddr.a[i] = s->eeprom[i + 1];
 357    }
 358    s->e2p_cmd |= 0x10;
 359    DPRINTF("MACADDR loaded from eeprom\n");
 360    lan9118_mac_changed(s);
 361}
 362
 363static void phy_update_irq(lan9118_state *s)
 364{
 365    if (s->phy_int & s->phy_int_mask) {
 366        s->int_sts |= PHY_INT;
 367    } else {
 368        s->int_sts &= ~PHY_INT;
 369    }
 370    lan9118_update(s);
 371}
 372
 373static void phy_update_link(lan9118_state *s)
 374{
 375    /* Autonegotiation status mirrors link status.  */
 376    if (s->nic->nc.link_down) {
 377        s->phy_status &= ~0x0024;
 378        s->phy_int |= PHY_INT_DOWN;
 379    } else {
 380        s->phy_status |= 0x0024;
 381        s->phy_int |= PHY_INT_ENERGYON;
 382        s->phy_int |= PHY_INT_AUTONEG_COMPLETE;
 383    }
 384    phy_update_irq(s);
 385}
 386
 387static void lan9118_set_link(NetClientState *nc)
 388{
 389    phy_update_link(DO_UPCAST(NICState, nc, nc)->opaque);
 390}
 391
 392static void phy_reset(lan9118_state *s)
 393{
 394    s->phy_status = 0x7809;
 395    s->phy_control = 0x3000;
 396    s->phy_advertise = 0x01e1;
 397    s->phy_int_mask = 0;
 398    s->phy_int = 0;
 399    phy_update_link(s);
 400}
 401
 402static void lan9118_reset(DeviceState *d)
 403{
 404    lan9118_state *s = FROM_SYSBUS(lan9118_state, sysbus_from_qdev(d));
 405    s->irq_cfg &= (IRQ_TYPE | IRQ_POL);
 406    s->int_sts = 0;
 407    s->int_en = 0;
 408    s->fifo_int = 0x48000000;
 409    s->rx_cfg = 0;
 410    s->tx_cfg = 0;
 411    s->hw_cfg = s->mode_16bit ? 0x00050000 : 0x00050004;
 412    s->pmt_ctrl &= 0x45;
 413    s->gpio_cfg = 0;
 414    s->txp->fifo_used = 0;
 415    s->txp->state = TX_IDLE;
 416    s->txp->cmd_a = 0xffffffffu;
 417    s->txp->cmd_b = 0xffffffffu;
 418    s->txp->len = 0;
 419    s->txp->fifo_used = 0;
 420    s->tx_fifo_size = 4608;
 421    s->tx_status_fifo_used = 0;
 422    s->rx_status_fifo_size = 704;
 423    s->rx_fifo_size = 2640;
 424    s->rx_fifo_used = 0;
 425    s->rx_status_fifo_size = 176;
 426    s->rx_status_fifo_used = 0;
 427    s->rxp_offset = 0;
 428    s->rxp_size = 0;
 429    s->rxp_pad = 0;
 430    s->rx_packet_size_tail = s->rx_packet_size_head;
 431    s->rx_packet_size[s->rx_packet_size_head] = 0;
 432    s->mac_cmd = 0;
 433    s->mac_data = 0;
 434    s->afc_cfg = 0;
 435    s->e2p_cmd = 0;
 436    s->e2p_data = 0;
 437    s->free_timer_start = qemu_get_clock_ns(vm_clock) / 40;
 438
 439    ptimer_stop(s->timer);
 440    ptimer_set_count(s->timer, 0xffff);
 441    s->gpt_cfg = 0xffff;
 442
 443    s->mac_cr = MAC_CR_PRMS;
 444    s->mac_hashh = 0;
 445    s->mac_hashl = 0;
 446    s->mac_mii_acc = 0;
 447    s->mac_mii_data = 0;
 448    s->mac_flow = 0;
 449
 450    s->read_word_n = 0;
 451    s->write_word_n = 0;
 452
 453    phy_reset(s);
 454
 455    s->eeprom_writable = 0;
 456    lan9118_reload_eeprom(s);
 457}
 458
 459static int lan9118_can_receive(NetClientState *nc)
 460{
 461    return 1;
 462}
 463
 464static void rx_fifo_push(lan9118_state *s, uint32_t val)
 465{
 466    int fifo_pos;
 467    fifo_pos = s->rx_fifo_head + s->rx_fifo_used;
 468    if (fifo_pos >= s->rx_fifo_size)
 469      fifo_pos -= s->rx_fifo_size;
 470    s->rx_fifo[fifo_pos] = val;
 471    s->rx_fifo_used++;
 472}
 473
 474/* Return nonzero if the packet is accepted by the filter.  */
 475static int lan9118_filter(lan9118_state *s, const uint8_t *addr)
 476{
 477    int multicast;
 478    uint32_t hash;
 479
 480    if (s->mac_cr & MAC_CR_PRMS) {
 481        return 1;
 482    }
 483    if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
 484        addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
 485        return (s->mac_cr & MAC_CR_BCAST) == 0;
 486    }
 487
 488    multicast = addr[0] & 1;
 489    if (multicast &&s->mac_cr & MAC_CR_MCPAS) {
 490        return 1;
 491    }
 492    if (multicast ? (s->mac_cr & MAC_CR_HPFILT) == 0
 493                  : (s->mac_cr & MAC_CR_HO) == 0) {
 494        /* Exact matching.  */
 495        hash = memcmp(addr, s->conf.macaddr.a, 6);
 496        if (s->mac_cr & MAC_CR_INVFILT) {
 497            return hash != 0;
 498        } else {
 499            return hash == 0;
 500        }
 501    } else {
 502        /* Hash matching  */
 503        hash = compute_mcast_idx(addr);
 504        if (hash & 0x20) {
 505            return (s->mac_hashh >> (hash & 0x1f)) & 1;
 506        } else {
 507            return (s->mac_hashl >> (hash & 0x1f)) & 1;
 508        }
 509    }
 510}
 511
 512static ssize_t lan9118_receive(NetClientState *nc, const uint8_t *buf,
 513                               size_t size)
 514{
 515    lan9118_state *s = DO_UPCAST(NICState, nc, nc)->opaque;
 516    int fifo_len;
 517    int offset;
 518    int src_pos;
 519    int n;
 520    int filter;
 521    uint32_t val;
 522    uint32_t crc;
 523    uint32_t status;
 524
 525    if ((s->mac_cr & MAC_CR_RXEN) == 0) {
 526        return -1;
 527    }
 528
 529    if (size >= 2048 || size < 14) {
 530        return -1;
 531    }
 532
 533    /* TODO: Implement FIFO overflow notification.  */
 534    if (s->rx_status_fifo_used == s->rx_status_fifo_size) {
 535        return -1;
 536    }
 537
 538    filter = lan9118_filter(s, buf);
 539    if (!filter && (s->mac_cr & MAC_CR_RXALL) == 0) {
 540        return size;
 541    }
 542
 543    offset = (s->rx_cfg >> 8) & 0x1f;
 544    n = offset & 3;
 545    fifo_len = (size + n + 3) >> 2;
 546    /* Add a word for the CRC.  */
 547    fifo_len++;
 548    if (s->rx_fifo_size - s->rx_fifo_used < fifo_len) {
 549        return -1;
 550    }
 551
 552    DPRINTF("Got packet len:%d fifo:%d filter:%s\n",
 553            (int)size, fifo_len, filter ? "pass" : "fail");
 554    val = 0;
 555    crc = bswap32(crc32(~0, buf, size));
 556    for (src_pos = 0; src_pos < size; src_pos++) {
 557        val = (val >> 8) | ((uint32_t)buf[src_pos] << 24);
 558        n++;
 559        if (n == 4) {
 560            n = 0;
 561            rx_fifo_push(s, val);
 562            val = 0;
 563        }
 564    }
 565    if (n) {
 566        val >>= ((4 - n) * 8);
 567        val |= crc << (n * 8);
 568        rx_fifo_push(s, val);
 569        val = crc >> ((4 - n) * 8);
 570        rx_fifo_push(s, val);
 571    } else {
 572        rx_fifo_push(s, crc);
 573    }
 574    n = s->rx_status_fifo_head + s->rx_status_fifo_used;
 575    if (n >= s->rx_status_fifo_size) {
 576        n -= s->rx_status_fifo_size;
 577    }
 578    s->rx_packet_size[s->rx_packet_size_tail] = fifo_len;
 579    s->rx_packet_size_tail = (s->rx_packet_size_tail + 1023) & 1023;
 580    s->rx_status_fifo_used++;
 581
 582    status = (size + 4) << 16;
 583    if (buf[0] == 0xff && buf[1] == 0xff && buf[2] == 0xff &&
 584        buf[3] == 0xff && buf[4] == 0xff && buf[5] == 0xff) {
 585        status |= 0x00002000;
 586    } else if (buf[0] & 1) {
 587        status |= 0x00000400;
 588    }
 589    if (!filter) {
 590        status |= 0x40000000;
 591    }
 592    s->rx_status_fifo[n] = status;
 593
 594    if (s->rx_status_fifo_used > (s->fifo_int & 0xff)) {
 595        s->int_sts |= RSFL_INT;
 596    }
 597    lan9118_update(s);
 598
 599    return size;
 600}
 601
 602static uint32_t rx_fifo_pop(lan9118_state *s)
 603{
 604    int n;
 605    uint32_t val;
 606
 607    if (s->rxp_size == 0 && s->rxp_pad == 0) {
 608        s->rxp_size = s->rx_packet_size[s->rx_packet_size_head];
 609        s->rx_packet_size[s->rx_packet_size_head] = 0;
 610        if (s->rxp_size != 0) {
 611            s->rx_packet_size_head = (s->rx_packet_size_head + 1023) & 1023;
 612            s->rxp_offset = (s->rx_cfg >> 10) & 7;
 613            n = s->rxp_offset + s->rxp_size;
 614            switch (s->rx_cfg >> 30) {
 615            case 1:
 616                n = (-n) & 3;
 617                break;
 618            case 2:
 619                n = (-n) & 7;
 620                break;
 621            default:
 622                n = 0;
 623                break;
 624            }
 625            s->rxp_pad = n;
 626            DPRINTF("Pop packet size:%d offset:%d pad: %d\n",
 627                    s->rxp_size, s->rxp_offset, s->rxp_pad);
 628        }
 629    }
 630    if (s->rxp_offset > 0) {
 631        s->rxp_offset--;
 632        val = 0;
 633    } else if (s->rxp_size > 0) {
 634        s->rxp_size--;
 635        val = s->rx_fifo[s->rx_fifo_head++];
 636        if (s->rx_fifo_head >= s->rx_fifo_size) {
 637            s->rx_fifo_head -= s->rx_fifo_size;
 638        }
 639        s->rx_fifo_used--;
 640    } else if (s->rxp_pad > 0) {
 641        s->rxp_pad--;
 642        val =  0;
 643    } else {
 644        DPRINTF("RX underflow\n");
 645        s->int_sts |= RXE_INT;
 646        val =  0;
 647    }
 648    lan9118_update(s);
 649    return val;
 650}
 651
 652static void do_tx_packet(lan9118_state *s)
 653{
 654    int n;
 655    uint32_t status;
 656
 657    /* FIXME: Honor TX disable, and allow queueing of packets.  */
 658    if (s->phy_control & 0x4000)  {
 659        /* This assumes the receive routine doesn't touch the VLANClient.  */
 660        lan9118_receive(&s->nic->nc, s->txp->data, s->txp->len);
 661    } else {
 662        qemu_send_packet(&s->nic->nc, s->txp->data, s->txp->len);
 663    }
 664    s->txp->fifo_used = 0;
 665
 666    if (s->tx_status_fifo_used == 512) {
 667        /* Status FIFO full */
 668        return;
 669    }
 670    /* Add entry to status FIFO.  */
 671    status = s->txp->cmd_b & 0xffff0000u;
 672    DPRINTF("Sent packet tag:%04x len %d\n", status >> 16, s->txp->len);
 673    n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
 674    s->tx_status_fifo[n] = status;
 675    s->tx_status_fifo_used++;
 676    if (s->tx_status_fifo_used == 512) {
 677        s->int_sts |= TSFF_INT;
 678        /* TODO: Stop transmission.  */
 679    }
 680}
 681
 682static uint32_t rx_status_fifo_pop(lan9118_state *s)
 683{
 684    uint32_t val;
 685
 686    val = s->rx_status_fifo[s->rx_status_fifo_head];
 687    if (s->rx_status_fifo_used != 0) {
 688        s->rx_status_fifo_used--;
 689        s->rx_status_fifo_head++;
 690        if (s->rx_status_fifo_head >= s->rx_status_fifo_size) {
 691            s->rx_status_fifo_head -= s->rx_status_fifo_size;
 692        }
 693        /* ??? What value should be returned when the FIFO is empty?  */
 694        DPRINTF("RX status pop 0x%08x\n", val);
 695    }
 696    return val;
 697}
 698
 699static uint32_t tx_status_fifo_pop(lan9118_state *s)
 700{
 701    uint32_t val;
 702
 703    val = s->tx_status_fifo[s->tx_status_fifo_head];
 704    if (s->tx_status_fifo_used != 0) {
 705        s->tx_status_fifo_used--;
 706        s->tx_status_fifo_head = (s->tx_status_fifo_head + 1) & 511;
 707        /* ??? What value should be returned when the FIFO is empty?  */
 708    }
 709    return val;
 710}
 711
 712static void tx_fifo_push(lan9118_state *s, uint32_t val)
 713{
 714    int n;
 715
 716    if (s->txp->fifo_used == s->tx_fifo_size) {
 717        s->int_sts |= TDFO_INT;
 718        return;
 719    }
 720    switch (s->txp->state) {
 721    case TX_IDLE:
 722        s->txp->cmd_a = val & 0x831f37ff;
 723        s->txp->fifo_used++;
 724        s->txp->state = TX_B;
 725        break;
 726    case TX_B:
 727        if (s->txp->cmd_a & 0x2000) {
 728            /* First segment */
 729            s->txp->cmd_b = val;
 730            s->txp->fifo_used++;
 731            s->txp->buffer_size = s->txp->cmd_a & 0x7ff;
 732            s->txp->offset = (s->txp->cmd_a >> 16) & 0x1f;
 733            /* End alignment does not include command words.  */
 734            n = (s->txp->buffer_size + s->txp->offset + 3) >> 2;
 735            switch ((n >> 24) & 3) {
 736            case 1:
 737                n = (-n) & 3;
 738                break;
 739            case 2:
 740                n = (-n) & 7;
 741                break;
 742            default:
 743                n = 0;
 744            }
 745            s->txp->pad = n;
 746            s->txp->len = 0;
 747        }
 748        DPRINTF("Block len:%d offset:%d pad:%d cmd %08x\n",
 749                s->txp->buffer_size, s->txp->offset, s->txp->pad,
 750                s->txp->cmd_a);
 751        s->txp->state = TX_DATA;
 752        break;
 753    case TX_DATA:
 754        if (s->txp->offset >= 4) {
 755            s->txp->offset -= 4;
 756            break;
 757        }
 758        if (s->txp->buffer_size <= 0 && s->txp->pad != 0) {
 759            s->txp->pad--;
 760        } else {
 761            n = 4;
 762            while (s->txp->offset) {
 763                val >>= 8;
 764                n--;
 765                s->txp->offset--;
 766            }
 767            /* Documentation is somewhat unclear on the ordering of bytes
 768               in FIFO words.  Empirical results show it to be little-endian.
 769               */
 770            /* TODO: FIFO overflow checking.  */
 771            while (n--) {
 772                s->txp->data[s->txp->len] = val & 0xff;
 773                s->txp->len++;
 774                val >>= 8;
 775                s->txp->buffer_size--;
 776            }
 777            s->txp->fifo_used++;
 778        }
 779        if (s->txp->buffer_size <= 0 && s->txp->pad == 0) {
 780            if (s->txp->cmd_a & 0x1000) {
 781                do_tx_packet(s);
 782            }
 783            if (s->txp->cmd_a & 0x80000000) {
 784                s->int_sts |= TX_IOC_INT;
 785            }
 786            s->txp->state = TX_IDLE;
 787        }
 788        break;
 789    }
 790}
 791
 792static uint32_t do_phy_read(lan9118_state *s, int reg)
 793{
 794    uint32_t val;
 795
 796    switch (reg) {
 797    case 0: /* Basic Control */
 798        return s->phy_control;
 799    case 1: /* Basic Status */
 800        return s->phy_status;
 801    case 2: /* ID1 */
 802        return 0x0007;
 803    case 3: /* ID2 */
 804        return 0xc0d1;
 805    case 4: /* Auto-neg advertisement */
 806        return s->phy_advertise;
 807    case 5: /* Auto-neg Link Partner Ability */
 808        return 0x0f71;
 809    case 6: /* Auto-neg Expansion */
 810        return 1;
 811        /* TODO 17, 18, 27, 29, 30, 31 */
 812    case 29: /* Interrupt source.  */
 813        val = s->phy_int;
 814        s->phy_int = 0;
 815        phy_update_irq(s);
 816        return val;
 817    case 30: /* Interrupt mask */
 818        return s->phy_int_mask;
 819    default:
 820        BADF("PHY read reg %d\n", reg);
 821        return 0;
 822    }
 823}
 824
 825static void do_phy_write(lan9118_state *s, int reg, uint32_t val)
 826{
 827    switch (reg) {
 828    case 0: /* Basic Control */
 829        if (val & 0x8000) {
 830            phy_reset(s);
 831            break;
 832        }
 833        s->phy_control = val & 0x7980;
 834        /* Complete autonegotiation immediately.  */
 835        if (val & 0x1000) {
 836            s->phy_status |= 0x0020;
 837        }
 838        break;
 839    case 4: /* Auto-neg advertisement */
 840        s->phy_advertise = (val & 0x2d7f) | 0x80;
 841        break;
 842        /* TODO 17, 18, 27, 31 */
 843    case 30: /* Interrupt mask */
 844        s->phy_int_mask = val & 0xff;
 845        phy_update_irq(s);
 846        break;
 847    default:
 848        BADF("PHY write reg %d = 0x%04x\n", reg, val);
 849    }
 850}
 851
 852static void do_mac_write(lan9118_state *s, int reg, uint32_t val)
 853{
 854    switch (reg) {
 855    case MAC_CR:
 856        if ((s->mac_cr & MAC_CR_RXEN) != 0 && (val & MAC_CR_RXEN) == 0) {
 857            s->int_sts |= RXSTOP_INT;
 858        }
 859        s->mac_cr = val & ~MAC_CR_RESERVED;
 860        DPRINTF("MAC_CR: %08x\n", val);
 861        break;
 862    case MAC_ADDRH:
 863        s->conf.macaddr.a[4] = val & 0xff;
 864        s->conf.macaddr.a[5] = (val >> 8) & 0xff;
 865        lan9118_mac_changed(s);
 866        break;
 867    case MAC_ADDRL:
 868        s->conf.macaddr.a[0] = val & 0xff;
 869        s->conf.macaddr.a[1] = (val >> 8) & 0xff;
 870        s->conf.macaddr.a[2] = (val >> 16) & 0xff;
 871        s->conf.macaddr.a[3] = (val >> 24) & 0xff;
 872        lan9118_mac_changed(s);
 873        break;
 874    case MAC_HASHH:
 875        s->mac_hashh = val;
 876        break;
 877    case MAC_HASHL:
 878        s->mac_hashl = val;
 879        break;
 880    case MAC_MII_ACC:
 881        s->mac_mii_acc = val & 0xffc2;
 882        if (val & 2) {
 883            DPRINTF("PHY write %d = 0x%04x\n",
 884                    (val >> 6) & 0x1f, s->mac_mii_data);
 885            do_phy_write(s, (val >> 6) & 0x1f, s->mac_mii_data);
 886        } else {
 887            s->mac_mii_data = do_phy_read(s, (val >> 6) & 0x1f);
 888            DPRINTF("PHY read %d = 0x%04x\n",
 889                    (val >> 6) & 0x1f, s->mac_mii_data);
 890        }
 891        break;
 892    case MAC_MII_DATA:
 893        s->mac_mii_data = val & 0xffff;
 894        break;
 895    case MAC_FLOW:
 896        s->mac_flow = val & 0xffff0000;
 897        break;
 898    case MAC_VLAN1:
 899        /* Writing to this register changes a condition for
 900         * FrameTooLong bit in rx_status.  Since we do not set
 901         * FrameTooLong anyway, just ignore write to this.
 902         */
 903        break;
 904    default:
 905        hw_error("lan9118: Unimplemented MAC register write: %d = 0x%x\n",
 906                 s->mac_cmd & 0xf, val);
 907    }
 908}
 909
 910static uint32_t do_mac_read(lan9118_state *s, int reg)
 911{
 912    switch (reg) {
 913    case MAC_CR:
 914        return s->mac_cr;
 915    case MAC_ADDRH:
 916        return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8);
 917    case MAC_ADDRL:
 918        return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8)
 919               | (s->conf.macaddr.a[2] << 16) | (s->conf.macaddr.a[3] << 24);
 920    case MAC_HASHH:
 921        return s->mac_hashh;
 922        break;
 923    case MAC_HASHL:
 924        return s->mac_hashl;
 925        break;
 926    case MAC_MII_ACC:
 927        return s->mac_mii_acc;
 928    case MAC_MII_DATA:
 929        return s->mac_mii_data;
 930    case MAC_FLOW:
 931        return s->mac_flow;
 932    default:
 933        hw_error("lan9118: Unimplemented MAC register read: %d\n",
 934                 s->mac_cmd & 0xf);
 935    }
 936}
 937
 938static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
 939{
 940    s->e2p_cmd = (s->e2p_cmd & 0x10) | (cmd << 28) | addr;
 941    switch (cmd) {
 942    case 0:
 943        s->e2p_data = s->eeprom[addr];
 944        DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
 945        break;
 946    case 1:
 947        s->eeprom_writable = 0;
 948        DPRINTF("EEPROM Write Disable\n");
 949        break;
 950    case 2: /* EWEN */
 951        s->eeprom_writable = 1;
 952        DPRINTF("EEPROM Write Enable\n");
 953        break;
 954    case 3: /* WRITE */
 955        if (s->eeprom_writable) {
 956            s->eeprom[addr] &= s->e2p_data;
 957            DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
 958        } else {
 959            DPRINTF("EEPROM Write %d (ignored)\n", addr);
 960        }
 961        break;
 962    case 4: /* WRAL */
 963        if (s->eeprom_writable) {
 964            for (addr = 0; addr < 128; addr++) {
 965                s->eeprom[addr] &= s->e2p_data;
 966            }
 967            DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
 968        } else {
 969            DPRINTF("EEPROM Write All (ignored)\n");
 970        }
 971        break;
 972    case 5: /* ERASE */
 973        if (s->eeprom_writable) {
 974            s->eeprom[addr] = 0xff;
 975            DPRINTF("EEPROM Erase %d\n", addr);
 976        } else {
 977            DPRINTF("EEPROM Erase %d (ignored)\n", addr);
 978        }
 979        break;
 980    case 6: /* ERAL */
 981        if (s->eeprom_writable) {
 982            memset(s->eeprom, 0xff, 128);
 983            DPRINTF("EEPROM Erase All\n");
 984        } else {
 985            DPRINTF("EEPROM Erase All (ignored)\n");
 986        }
 987        break;
 988    case 7: /* RELOAD */
 989        lan9118_reload_eeprom(s);
 990        break;
 991    }
 992}
 993
 994static void lan9118_tick(void *opaque)
 995{
 996    lan9118_state *s = (lan9118_state *)opaque;
 997    if (s->int_en & GPT_INT) {
 998        s->int_sts |= GPT_INT;
 999    }
1000    lan9118_update(s);
1001}
1002
1003static void lan9118_writel(void *opaque, hwaddr offset,
1004                           uint64_t val, unsigned size)
1005{
1006    lan9118_state *s = (lan9118_state *)opaque;
1007    offset &= 0xff;
1008
1009    //DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
1010    if (offset >= 0x20 && offset < 0x40) {
1011        /* TX FIFO */
1012        tx_fifo_push(s, val);
1013        return;
1014    }
1015    switch (offset) {
1016    case CSR_IRQ_CFG:
1017        /* TODO: Implement interrupt deassertion intervals.  */
1018        val &= (IRQ_EN | IRQ_POL | IRQ_TYPE);
1019        s->irq_cfg = (s->irq_cfg & IRQ_INT) | val;
1020        break;
1021    case CSR_INT_STS:
1022        s->int_sts &= ~val;
1023        break;
1024    case CSR_INT_EN:
1025        s->int_en = val & ~RESERVED_INT;
1026        s->int_sts |= val & SW_INT;
1027        break;
1028    case CSR_FIFO_INT:
1029        DPRINTF("FIFO INT levels %08x\n", val);
1030        s->fifo_int = val;
1031        break;
1032    case CSR_RX_CFG:
1033        if (val & 0x8000) {
1034            /* RX_DUMP */
1035            s->rx_fifo_used = 0;
1036            s->rx_status_fifo_used = 0;
1037            s->rx_packet_size_tail = s->rx_packet_size_head;
1038            s->rx_packet_size[s->rx_packet_size_head] = 0;
1039        }
1040        s->rx_cfg = val & 0xcfff1ff0;
1041        break;
1042    case CSR_TX_CFG:
1043        if (val & 0x8000) {
1044            s->tx_status_fifo_used = 0;
1045        }
1046        if (val & 0x4000) {
1047            s->txp->state = TX_IDLE;
1048            s->txp->fifo_used = 0;
1049            s->txp->cmd_a = 0xffffffff;
1050        }
1051        s->tx_cfg = val & 6;
1052        break;
1053    case CSR_HW_CFG:
1054        if (val & 1) {
1055            /* SRST */
1056            lan9118_reset(&s->busdev.qdev);
1057        } else {
1058            s->hw_cfg = (val & 0x003f300) | (s->hw_cfg & 0x4);
1059        }
1060        break;
1061    case CSR_RX_DP_CTRL:
1062        if (val & 0x80000000) {
1063            /* Skip forward to next packet.  */
1064            s->rxp_pad = 0;
1065            s->rxp_offset = 0;
1066            if (s->rxp_size == 0) {
1067                /* Pop a word to start the next packet.  */
1068                rx_fifo_pop(s);
1069                s->rxp_pad = 0;
1070                s->rxp_offset = 0;
1071            }
1072            s->rx_fifo_head += s->rxp_size;
1073            if (s->rx_fifo_head >= s->rx_fifo_size) {
1074                s->rx_fifo_head -= s->rx_fifo_size;
1075            }
1076        }
1077        break;
1078    case CSR_PMT_CTRL:
1079        if (val & 0x400) {
1080            phy_reset(s);
1081        }
1082        s->pmt_ctrl &= ~0x34e;
1083        s->pmt_ctrl |= (val & 0x34e);
1084        break;
1085    case CSR_GPIO_CFG:
1086        /* Probably just enabling LEDs.  */
1087        s->gpio_cfg = val & 0x7777071f;
1088        break;
1089    case CSR_GPT_CFG:
1090        if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
1091            if (val & GPT_TIMER_EN) {
1092                ptimer_set_count(s->timer, val & 0xffff);
1093                ptimer_run(s->timer, 0);
1094            } else {
1095                ptimer_stop(s->timer);
1096                ptimer_set_count(s->timer, 0xffff);
1097            }
1098        }
1099        s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
1100        break;
1101    case CSR_WORD_SWAP:
1102        /* Ignored because we're in 32-bit mode.  */
1103        s->word_swap = val;
1104        break;
1105    case CSR_MAC_CSR_CMD:
1106        s->mac_cmd = val & 0x4000000f;
1107        if (val & 0x80000000) {
1108            if (val & 0x40000000) {
1109                s->mac_data = do_mac_read(s, val & 0xf);
1110                DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data);
1111            } else {
1112                DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data);
1113                do_mac_write(s, val & 0xf, s->mac_data);
1114            }
1115        }
1116        break;
1117    case CSR_MAC_CSR_DATA:
1118        s->mac_data = val;
1119        break;
1120    case CSR_AFC_CFG:
1121        s->afc_cfg = val & 0x00ffffff;
1122        break;
1123    case CSR_E2P_CMD:
1124        lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0x7f);
1125        break;
1126    case CSR_E2P_DATA:
1127        s->e2p_data = val & 0xff;
1128        break;
1129
1130    default:
1131        hw_error("lan9118_write: Bad reg 0x%x = %x\n", (int)offset, (int)val);
1132        break;
1133    }
1134    lan9118_update(s);
1135}
1136
1137static void lan9118_writew(void *opaque, hwaddr offset,
1138                           uint32_t val)
1139{
1140    lan9118_state *s = (lan9118_state *)opaque;
1141    offset &= 0xff;
1142
1143    if (s->write_word_prev_offset != (offset & ~0x3)) {
1144        /* New offset, reset word counter */
1145        s->write_word_n = 0;
1146        s->write_word_prev_offset = offset & ~0x3;
1147    }
1148
1149    if (offset & 0x2) {
1150        s->write_word_h = val;
1151    } else {
1152        s->write_word_l = val;
1153    }
1154
1155    //DPRINTF("Writew reg 0x%02x = 0x%08x\n", (int)offset, val);
1156    s->write_word_n++;
1157    if (s->write_word_n == 2) {
1158        s->write_word_n = 0;
1159        lan9118_writel(s, offset & ~3, s->write_word_l +
1160                (s->write_word_h << 16), 4);
1161    }
1162}
1163
1164static void lan9118_16bit_mode_write(void *opaque, hwaddr offset,
1165                                     uint64_t val, unsigned size)
1166{
1167    switch (size) {
1168    case 2:
1169        lan9118_writew(opaque, offset, (uint32_t)val);
1170        return;
1171    case 4:
1172        lan9118_writel(opaque, offset, val, size);
1173        return;
1174    }
1175
1176    hw_error("lan9118_write: Bad size 0x%x\n", size);
1177}
1178
1179static uint64_t lan9118_readl(void *opaque, hwaddr offset,
1180                              unsigned size)
1181{
1182    lan9118_state *s = (lan9118_state *)opaque;
1183
1184    //DPRINTF("Read reg 0x%02x\n", (int)offset);
1185    if (offset < 0x20) {
1186        /* RX FIFO */
1187        return rx_fifo_pop(s);
1188    }
1189    switch (offset) {
1190    case 0x40:
1191        return rx_status_fifo_pop(s);
1192    case 0x44:
1193        return s->rx_status_fifo[s->tx_status_fifo_head];
1194    case 0x48:
1195        return tx_status_fifo_pop(s);
1196    case 0x4c:
1197        return s->tx_status_fifo[s->tx_status_fifo_head];
1198    case CSR_ID_REV:
1199        return 0x01180001;
1200    case CSR_IRQ_CFG:
1201        return s->irq_cfg;
1202    case CSR_INT_STS:
1203        return s->int_sts;
1204    case CSR_INT_EN:
1205        return s->int_en;
1206    case CSR_BYTE_TEST:
1207        return 0x87654321;
1208    case CSR_FIFO_INT:
1209        return s->fifo_int;
1210    case CSR_RX_CFG:
1211        return s->rx_cfg;
1212    case CSR_TX_CFG:
1213        return s->tx_cfg;
1214    case CSR_HW_CFG:
1215        return s->hw_cfg;
1216    case CSR_RX_DP_CTRL:
1217        return 0;
1218    case CSR_RX_FIFO_INF:
1219        return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2);
1220    case CSR_TX_FIFO_INF:
1221        return (s->tx_status_fifo_used << 16)
1222               | (s->tx_fifo_size - s->txp->fifo_used);
1223    case CSR_PMT_CTRL:
1224        return s->pmt_ctrl;
1225    case CSR_GPIO_CFG:
1226        return s->gpio_cfg;
1227    case CSR_GPT_CFG:
1228        return s->gpt_cfg;
1229    case CSR_GPT_CNT:
1230        return ptimer_get_count(s->timer);
1231    case CSR_WORD_SWAP:
1232        return s->word_swap;
1233    case CSR_FREE_RUN:
1234        return (qemu_get_clock_ns(vm_clock) / 40) - s->free_timer_start;
1235    case CSR_RX_DROP:
1236        /* TODO: Implement dropped frames counter.  */
1237        return 0;
1238    case CSR_MAC_CSR_CMD:
1239        return s->mac_cmd;
1240    case CSR_MAC_CSR_DATA:
1241        return s->mac_data;
1242    case CSR_AFC_CFG:
1243        return s->afc_cfg;
1244    case CSR_E2P_CMD:
1245        return s->e2p_cmd;
1246    case CSR_E2P_DATA:
1247        return s->e2p_data;
1248    }
1249    hw_error("lan9118_read: Bad reg 0x%x\n", (int)offset);
1250    return 0;
1251}
1252
1253static uint32_t lan9118_readw(void *opaque, hwaddr offset)
1254{
1255    lan9118_state *s = (lan9118_state *)opaque;
1256    uint32_t val;
1257
1258    if (s->read_word_prev_offset != (offset & ~0x3)) {
1259        /* New offset, reset word counter */
1260        s->read_word_n = 0;
1261        s->read_word_prev_offset = offset & ~0x3;
1262    }
1263
1264    s->read_word_n++;
1265    if (s->read_word_n == 1) {
1266        s->read_long = lan9118_readl(s, offset & ~3, 4);
1267    } else {
1268        s->read_word_n = 0;
1269    }
1270
1271    if (offset & 2) {
1272        val = s->read_long >> 16;
1273    } else {
1274        val = s->read_long & 0xFFFF;
1275    }
1276
1277    //DPRINTF("Readw reg 0x%02x, val 0x%x\n", (int)offset, val);
1278    return val;
1279}
1280
1281static uint64_t lan9118_16bit_mode_read(void *opaque, hwaddr offset,
1282                                        unsigned size)
1283{
1284    switch (size) {
1285    case 2:
1286        return lan9118_readw(opaque, offset);
1287    case 4:
1288        return lan9118_readl(opaque, offset, size);
1289    }
1290
1291    hw_error("lan9118_read: Bad size 0x%x\n", size);
1292    return 0;
1293}
1294
1295static const MemoryRegionOps lan9118_mem_ops = {
1296    .read = lan9118_readl,
1297    .write = lan9118_writel,
1298    .endianness = DEVICE_NATIVE_ENDIAN,
1299};
1300
1301static const MemoryRegionOps lan9118_16bit_mem_ops = {
1302    .read = lan9118_16bit_mode_read,
1303    .write = lan9118_16bit_mode_write,
1304    .endianness = DEVICE_NATIVE_ENDIAN,
1305};
1306
1307static void lan9118_cleanup(NetClientState *nc)
1308{
1309    lan9118_state *s = DO_UPCAST(NICState, nc, nc)->opaque;
1310
1311    s->nic = NULL;
1312}
1313
1314static NetClientInfo net_lan9118_info = {
1315    .type = NET_CLIENT_OPTIONS_KIND_NIC,
1316    .size = sizeof(NICState),
1317    .can_receive = lan9118_can_receive,
1318    .receive = lan9118_receive,
1319    .cleanup = lan9118_cleanup,
1320    .link_status_changed = lan9118_set_link,
1321};
1322
1323static int lan9118_init1(SysBusDevice *dev)
1324{
1325    lan9118_state *s = FROM_SYSBUS(lan9118_state, 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, mem_ops, s, "lan9118-mmio", 0x100);
1332    sysbus_init_mmio(dev, &s->mmio);
1333    sysbus_init_irq(dev, &s->irq);
1334    qemu_macaddr_default_if_unset(&s->conf.macaddr);
1335
1336    s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1337                          object_get_typename(OBJECT(dev)), dev->qdev.id, s);
1338    qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
1339    s->eeprom[0] = 0xa5;
1340    for (i = 0; i < 6; i++) {
1341        s->eeprom[i + 1] = s->conf.macaddr.a[i];
1342    }
1343    s->pmt_ctrl = 1;
1344    s->txp = &s->tx_packet;
1345
1346    bh = qemu_bh_new(lan9118_tick, s);
1347    s->timer = ptimer_init(bh);
1348    ptimer_set_freq(s->timer, 10000);
1349    ptimer_set_limit(s->timer, 0xffff, 1);
1350
1351    return 0;
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    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1364
1365    k->init = lan9118_init1;
1366    dc->reset = lan9118_reset;
1367    dc->props = lan9118_properties;
1368    dc->vmsd = &vmstate_lan9118;
1369}
1370
1371static TypeInfo lan9118_info = {
1372    .name          = "lan9118",
1373    .parent        = TYPE_SYS_BUS_DEVICE,
1374    .instance_size = sizeof(lan9118_state),
1375    .class_init    = lan9118_class_init,
1376};
1377
1378static void lan9118_register_types(void)
1379{
1380    type_register_static(&lan9118_info);
1381}
1382
1383/* Legacy helper function.  Should go away when machine config files are
1384   implemented.  */
1385void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1386{
1387    DeviceState *dev;
1388    SysBusDevice *s;
1389
1390    qemu_check_nic_model(nd, "lan9118");
1391    dev = qdev_create(NULL, "lan9118");
1392    qdev_set_nic_properties(dev, nd);
1393    qdev_init_nofail(dev);
1394    s = sysbus_from_qdev(dev);
1395    sysbus_mmio_map(s, 0, base);
1396    sysbus_connect_irq(s, 0, irq);
1397}
1398
1399type_init(lan9118_register_types)
1400