hw/net/lan9118.c

   1 /*
   2  * SMSC LAN9118 Ethernet interface emulation
   3  *
   4  * Copyright (c) 2009 CodeSourcery, LLC.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GNU GPL v2
   8  *
   9  * Contributions after 2012-01-13 are licensed under the terms of the
  10  * GNU GPL, version 2 or (at your option) any later version.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "hw/sysbus.h"
  15 #include "migration/vmstate.h"
  16 #include "net/net.h"
  17 #include "net/eth.h"
  18 #include "hw/hw.h"
  19 #include "hw/irq.h"
  20 #include "hw/net/lan9118.h"
  21 #include "sysemu/sysemu.h"
  22 #include "hw/ptimer.h"
  23 #include "hw/qdev-properties.h"
  24 #include "qemu/log.h"
  25 #include "qemu/main-loop.h"
  26 #include "qemu/module.h"
  27 /* For crc32 */
  28 #include <zlib.h>
  29
  30 //#define DEBUG_LAN9118
  31
  32 #ifdef DEBUG_LAN9118
  33 #define DPRINTF(fmt, ...) \
  34 do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0)
  35 #define BADF(fmt, ...) \
  36 do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  37 #else
  38 #define DPRINTF(fmt, ...) do {} while(0)
  39 #define BADF(fmt, ...) \
  40 do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
  41 #endif
  42
  43 #define CSR_ID_REV      0x50
  44 #define CSR_IRQ_CFG     0x54
  45 #define CSR_INT_STS     0x58
  46 #define CSR_INT_EN      0x5c
  47 #define CSR_BYTE_TEST   0x64
  48 #define CSR_FIFO_INT    0x68
  49 #define CSR_RX_CFG      0x6c
  50 #define CSR_TX_CFG      0x70
  51 #define CSR_HW_CFG      0x74
  52 #define CSR_RX_DP_CTRL  0x78
  53 #define CSR_RX_FIFO_INF 0x7c
  54 #define CSR_TX_FIFO_INF 0x80
  55 #define CSR_PMT_CTRL    0x84
  56 #define CSR_GPIO_CFG    0x88
  57 #define CSR_GPT_CFG     0x8c
  58 #define CSR_GPT_CNT     0x90
  59 #define CSR_WORD_SWAP   0x98
  60 #define CSR_FREE_RUN    0x9c
  61 #define CSR_RX_DROP     0xa0
  62 #define CSR_MAC_CSR_CMD 0xa4
  63 #define CSR_MAC_CSR_DATA 0xa8
  64 #define CSR_AFC_CFG     0xac
  65 #define CSR_E2P_CMD     0xb0
  66 #define CSR_E2P_DATA    0xb4
  67
  68 #define E2P_CMD_MAC_ADDR_LOADED 0x100
  69
  70 /* IRQ_CFG */
  71 #define IRQ_INT         0x00001000
  72 #define IRQ_EN          0x00000100
  73 #define IRQ_POL         0x00000010
  74 #define IRQ_TYPE        0x00000001
  75
  76 /* INT_STS/INT_EN */
  77 #define SW_INT          0x80000000
  78 #define TXSTOP_INT      0x02000000
  79 #define RXSTOP_INT      0x01000000
  80 #define RXDFH_INT       0x00800000
  81 #define TX_IOC_INT      0x00200000
  82 #define RXD_INT         0x00100000
  83 #define GPT_INT         0x00080000
  84 #define PHY_INT         0x00040000
  85 #define PME_INT         0x00020000
  86 #define TXSO_INT        0x00010000
  87 #define RWT_INT         0x00008000
  88 #define RXE_INT         0x00004000
  89 #define TXE_INT         0x00002000
  90 #define TDFU_INT        0x00000800
  91 #define TDFO_INT        0x00000400
  92 #define TDFA_INT        0x00000200
  93 #define TSFF_INT        0x00000100
  94 #define TSFL_INT        0x00000080
  95 #define RXDF_INT        0x00000040
  96 #define RDFL_INT        0x00000020
  97 #define RSFF_INT        0x00000010
  98 #define RSFL_INT        0x00000008
  99 #define GPIO2_INT       0x00000004
 100 #define GPIO1_INT       0x00000002
 101 #define GPIO0_INT       0x00000001
 102 #define RESERVED_INT    0x7c001000
 103
 104 #define MAC_CR          1
 105 #define MAC_ADDRH       2
 106 #define MAC_ADDRL       3
 107 #define MAC_HASHH       4
 108 #define MAC_HASHL       5
 109 #define MAC_MII_ACC     6
 110 #define MAC_MII_DATA    7
 111 #define MAC_FLOW        8
 112 #define MAC_VLAN1       9 /* TODO */
 113 #define MAC_VLAN2       10 /* TODO */
 114 #define MAC_WUFF        11 /* TODO */
 115 #define MAC_WUCSR       12 /* TODO */
 116
 117 #define MAC_CR_RXALL    0x80000000
 118 #define MAC_CR_RCVOWN   0x00800000
 119 #define MAC_CR_LOOPBK   0x00200000
 120 #define MAC_CR_FDPX     0x00100000
 121 #define MAC_CR_MCPAS    0x00080000
 122 #define MAC_CR_PRMS     0x00040000
 123 #define MAC_CR_INVFILT  0x00020000
 124 #define MAC_CR_PASSBAD  0x00010000
 125 #define MAC_CR_HO       0x00008000
 126 #define MAC_CR_HPFILT   0x00002000
 127 #define MAC_CR_LCOLL    0x00001000
 128 #define MAC_CR_BCAST    0x00000800
 129 #define MAC_CR_DISRTY   0x00000400
 130 #define MAC_CR_PADSTR   0x00000100
 131 #define MAC_CR_BOLMT    0x000000c0
 132 #define MAC_CR_DFCHK    0x00000020
 133 #define MAC_CR_TXEN     0x00000008
 134 #define MAC_CR_RXEN     0x00000004
 135 #define MAC_CR_RESERVED 0x7f404213
 136
 137 #define PHY_INT_ENERGYON            0x80
 138 #define PHY_INT_AUTONEG_COMPLETE    0x40
 139 #define PHY_INT_FAULT               0x20
 140 #define PHY_INT_DOWN                0x10
 141 #define PHY_INT_AUTONEG_LP          0x08
 142 #define PHY_INT_PARFAULT            0x04
 143 #define PHY_INT_AUTONEG_PAGE        0x02
 144
 145 #define GPT_TIMER_EN    0x20000000
 146
 147 enum tx_state {
 148     TX_IDLE,
 149     TX_B,
 150     TX_DATA
 151 };
 152
 153 typedef struct {
 154     /* state is a tx_state but we can't put enums in VMStateDescriptions. */
 155     uint32_t state;
 156     uint32_t cmd_a;
 157     uint32_t cmd_b;
 158     int32_t buffer_size;
 159     int32_t offset;
 160     int32_t pad;
 161     int32_t fifo_used;
 162     int32_t len;
 163     uint8_t data[2048];
 164 } LAN9118Packet;
 165
 166 static const VMStateDescription vmstate_lan9118_packet = {
 167     .name = "lan9118_packet",
 168     .version_id = 1,
 169     .minimum_version_id = 1,
 170     .fields = (VMStateField[]) {
 171         VMSTATE_UINT32(state, LAN9118Packet),
 172         VMSTATE_UINT32(cmd_a, LAN9118Packet),
 173         VMSTATE_UINT32(cmd_b, LAN9118Packet),
 174         VMSTATE_INT32(buffer_size, LAN9118Packet),
 175         VMSTATE_INT32(offset, LAN9118Packet),
 176         VMSTATE_INT32(pad, LAN9118Packet),
 177         VMSTATE_INT32(fifo_used, LAN9118Packet),
 178         VMSTATE_INT32(len, LAN9118Packet),
 179         VMSTATE_UINT8_ARRAY(data, LAN9118Packet, 2048),
 180         VMSTATE_END_OF_LIST()
 181     }
 182 };
 183
 184 #define LAN9118(obj) OBJECT_CHECK(lan9118_state, (obj), TYPE_LAN9118)
 185
 186 typedef struct {
 187     SysBusDevice parent_obj;
 188
 189     NICState *nic;
 190     NICConf conf;
 191     qemu_irq irq;
 192     MemoryRegion mmio;
 193     ptimer_state *timer;
 194
 195     uint32_t irq_cfg;
 196     uint32_t int_sts;
 197     uint32_t int_en;
 198     uint32_t fifo_int;
 199     uint32_t rx_cfg;
 200     uint32_t tx_cfg;
 201     uint32_t hw_cfg;
 202     uint32_t pmt_ctrl;
 203     uint32_t gpio_cfg;
 204     uint32_t gpt_cfg;
 205     uint32_t word_swap;
 206     uint32_t free_timer_start;
 207     uint32_t mac_cmd;
 208     uint32_t mac_data;
 209     uint32_t afc_cfg;
 210     uint32_t e2p_cmd;
 211     uint32_t e2p_data;
 212
 213     uint32_t mac_cr;
 214     uint32_t mac_hashh;
 215     uint32_t mac_hashl;
 216     uint32_t mac_mii_acc;
 217     uint32_t mac_mii_data;
 218     uint32_t mac_flow;
 219
 220     uint32_t phy_status;
 221     uint32_t phy_control;
 222     uint32_t phy_advertise;
 223     uint32_t phy_int;
 224     uint32_t phy_int_mask;
 225
 226     int32_t eeprom_writable;
 227     uint8_t eeprom[128];
 228
 229     int32_t tx_fifo_size;
 230     LAN9118Packet *txp;
 231     LAN9118Packet tx_packet;
 232
 233     int32_t tx_status_fifo_used;
 234     int32_t tx_status_fifo_head;
 235     uint32_t tx_status_fifo[512];
 236
 237     int32_t rx_status_fifo_size;
 238     int32_t rx_status_fifo_used;
 239     int32_t rx_status_fifo_head;
 240     uint32_t rx_status_fifo[896];
 241     int32_t rx_fifo_size;
 242     int32_t rx_fifo_used;
 243     int32_t rx_fifo_head;
 244     uint32_t rx_fifo[3360];
 245     int32_t rx_packet_size_head;
 246     int32_t rx_packet_size_tail;
 247     int32_t rx_packet_size[1024];
 248
 249     int32_t rxp_offset;
 250     int32_t rxp_size;
 251     int32_t rxp_pad;
 252
 253     uint32_t write_word_prev_offset;
 254     uint32_t write_word_n;
 255     uint16_t write_word_l;
 256     uint16_t write_word_h;
 257     uint32_t read_word_prev_offset;
 258     uint32_t read_word_n;
 259     uint32_t read_long;
 260
 261     uint32_t mode_16bit;
 262 } lan9118_state;
 263
 264 static const VMStateDescription vmstate_lan9118 = {
 265     .name = "lan9118",
 266     .version_id = 2,
 267     .minimum_version_id = 1,
 268     .fields = (VMStateField[]) {
 269         VMSTATE_PTIMER(timer, lan9118_state),
 270         VMSTATE_UINT32(irq_cfg, lan9118_state),
 271         VMSTATE_UINT32(int_sts, lan9118_state),
 272         VMSTATE_UINT32(int_en, lan9118_state),
 273         VMSTATE_UINT32(fifo_int, lan9118_state),
 274         VMSTATE_UINT32(rx_cfg, lan9118_state),
 275         VMSTATE_UINT32(tx_cfg, lan9118_state),
 276         VMSTATE_UINT32(hw_cfg, lan9118_state),
 277         VMSTATE_UINT32(pmt_ctrl, lan9118_state),
 278         VMSTATE_UINT32(gpio_cfg, lan9118_state),
 279         VMSTATE_UINT32(gpt_cfg, lan9118_state),
 280         VMSTATE_UINT32(word_swap, lan9118_state),
 281         VMSTATE_UINT32(free_timer_start, lan9118_state),
 282         VMSTATE_UINT32(mac_cmd, lan9118_state),
 283         VMSTATE_UINT32(mac_data, lan9118_state),
 284         VMSTATE_UINT32(afc_cfg, lan9118_state),
 285         VMSTATE_UINT32(e2p_cmd, lan9118_state),
 286         VMSTATE_UINT32(e2p_data, lan9118_state),
 287         VMSTATE_UINT32(mac_cr, lan9118_state),
 288         VMSTATE_UINT32(mac_hashh, lan9118_state),
 289         VMSTATE_UINT32(mac_hashl, lan9118_state),
 290         VMSTATE_UINT32(mac_mii_acc, lan9118_state),
 291         VMSTATE_UINT32(mac_mii_data, lan9118_state),
 292         VMSTATE_UINT32(mac_flow, lan9118_state),
 293         VMSTATE_UINT32(phy_status, lan9118_state),
 294         VMSTATE_UINT32(phy_control, lan9118_state),
 295         VMSTATE_UINT32(phy_advertise, lan9118_state),
 296         VMSTATE_UINT32(phy_int, lan9118_state),
 297         VMSTATE_UINT32(phy_int_mask, lan9118_state),
 298         VMSTATE_INT32(eeprom_writable, lan9118_state),
 299         VMSTATE_UINT8_ARRAY(eeprom, lan9118_state, 128),
 300         VMSTATE_INT32(tx_fifo_size, lan9118_state),
 301         /* txp always points at tx_packet so need not be saved */
 302         VMSTATE_STRUCT(tx_packet, lan9118_state, 0,
 303                        vmstate_lan9118_packet, LAN9118Packet),
 304         VMSTATE_INT32(tx_status_fifo_used, lan9118_state),
 305         VMSTATE_INT32(tx_status_fifo_head, lan9118_state),
 306         VMSTATE_UINT32_ARRAY(tx_status_fifo, lan9118_state, 512),
 307         VMSTATE_INT32(rx_status_fifo_size, lan9118_state),
 308         VMSTATE_INT32(rx_status_fifo_used, lan9118_state),
 309         VMSTATE_INT32(rx_status_fifo_head, lan9118_state),
 310         VMSTATE_UINT32_ARRAY(rx_status_fifo, lan9118_state, 896),
 311         VMSTATE_INT32(rx_fifo_size, lan9118_state),
 312         VMSTATE_INT32(rx_fifo_used, lan9118_state),
 313         VMSTATE_INT32(rx_fifo_head, lan9118_state),
 314         VMSTATE_UINT32_ARRAY(rx_fifo, lan9118_state, 3360),
 315         VMSTATE_INT32(rx_packet_size_head, lan9118_state),
 316         VMSTATE_INT32(rx_packet_size_tail, lan9118_state),
 317         VMSTATE_INT32_ARRAY(rx_packet_size, lan9118_state, 1024),
 318         VMSTATE_INT32(rxp_offset, lan9118_state),
 319         VMSTATE_INT32(rxp_size, lan9118_state),
 320         VMSTATE_INT32(rxp_pad, lan9118_state),
 321         VMSTATE_UINT32_V(write_word_prev_offset, lan9118_state, 2),
 322         VMSTATE_UINT32_V(write_word_n, lan9118_state, 2),
 323         VMSTATE_UINT16_V(write_word_l, lan9118_state, 2),
 324         VMSTATE_UINT16_V(write_word_h, lan9118_state, 2),
 325         VMSTATE_UINT32_V(read_word_prev_offset, lan9118_state, 2),
 326         VMSTATE_UINT32_V(read_word_n, lan9118_state, 2),
 327         VMSTATE_UINT32_V(read_long, lan9118_state, 2),
 328         VMSTATE_UINT32_V(mode_16bit, lan9118_state, 2),
 329         VMSTATE_END_OF_LIST()
 330     }
 331 };
 332
 333 static void lan9118_update(lan9118_state *s)
 334 {
 335     int level;
 336
 337     /* TODO: Implement FIFO level IRQs.  */
 338     level = (s->int_sts & s->int_en) != 0;
 339     if (level) {
 340         s->irq_cfg |= IRQ_INT;
 341     } else {
 342         s->irq_cfg &= ~IRQ_INT;
 343     }
 344     if ((s->irq_cfg & IRQ_EN) == 0) {
 345         level = 0;
 346     }
 347     if ((s->irq_cfg & (IRQ_TYPE | IRQ_POL)) != (IRQ_TYPE | IRQ_POL)) {
 348         /* Interrupt is active low unless we're configured as
 349          * active-high polarity, push-pull type.
 350          */
 351         level = !level;
 352     }
 353     qemu_set_irq(s->irq, level);
 354 }
 355
 356 static void lan9118_mac_changed(lan9118_state *s)
 357 {
 358     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 359 }
 360
 361 static void lan9118_reload_eeprom(lan9118_state *s)
 362 {
 363     int i;
 364     if (s->eeprom[0] != 0xa5) {
 365         s->e2p_cmd &= ~E2P_CMD_MAC_ADDR_LOADED;
 366         DPRINTF("MACADDR load failed\n");
 367         return;
 368     }
 369     for (i = 0; i < 6; i++) {
 370         s->conf.macaddr.a[i] = s->eeprom[i + 1];
 371     }
 372     s->e2p_cmd |= E2P_CMD_MAC_ADDR_LOADED;
 373     DPRINTF("MACADDR loaded from eeprom\n");
 374     lan9118_mac_changed(s);
 375 }
 376
 377 static void phy_update_irq(lan9118_state *s)
 378 {
 379     if (s->phy_int & s->phy_int_mask) {
 380         s->int_sts |= PHY_INT;
 381     } else {
 382         s->int_sts &= ~PHY_INT;
 383     }
 384     lan9118_update(s);
 385 }
 386
 387 static void phy_update_link(lan9118_state *s)
 388 {
 389     /* Autonegotiation status mirrors link status.  */
 390     if (qemu_get_queue(s->nic)->link_down) {
 391         s->phy_status &= ~0x0024;
 392         s->phy_int |= PHY_INT_DOWN;
 393     } else {
 394         s->phy_status |= 0x0024;
 395         s->phy_int |= PHY_INT_ENERGYON;
 396         s->phy_int |= PHY_INT_AUTONEG_COMPLETE;
 397     }
 398     phy_update_irq(s);
 399 }
 400
 401 static void lan9118_set_link(NetClientState *nc)
 402 {
 403     phy_update_link(qemu_get_nic_opaque(nc));
 404 }
 405
 406 static void phy_reset(lan9118_state *s)
 407 {
 408     s->phy_status = 0x7809;
 409     s->phy_control = 0x3000;
 410     s->phy_advertise = 0x01e1;
 411     s->phy_int_mask = 0;
 412     s->phy_int = 0;
 413     phy_update_link(s);
 414 }
 415
 416 static void lan9118_reset(DeviceState *d)
 417 {
 418     lan9118_state *s = LAN9118(d);
 419
 420     s->irq_cfg &= (IRQ_TYPE | IRQ_POL);
 421     s->int_sts = 0;
 422     s->int_en = 0;
 423     s->fifo_int = 0x48000000;
 424     s->rx_cfg = 0;
 425     s->tx_cfg = 0;
 426     s->hw_cfg = s->mode_16bit ? 0x00050000 : 0x00050004;
 427     s->pmt_ctrl &= 0x45;
 428     s->gpio_cfg = 0;
 429     s->txp->fifo_used = 0;
 430     s->txp->state = TX_IDLE;
 431     s->txp->cmd_a = 0xffffffffu;
 432     s->txp->cmd_b = 0xffffffffu;
 433     s->txp->len = 0;
 434     s->txp->fifo_used = 0;
 435     s->tx_fifo_size = 4608;
 436     s->tx_status_fifo_used = 0;
 437     s->rx_status_fifo_size = 704;
 438     s->rx_fifo_size = 2640;
 439     s->rx_fifo_used = 0;
 440     s->rx_status_fifo_size = 176;
 441     s->rx_status_fifo_used = 0;
 442     s->rxp_offset = 0;
 443     s->rxp_size = 0;
 444     s->rxp_pad = 0;
 445     s->rx_packet_size_tail = s->rx_packet_size_head;
 446     s->rx_packet_size[s->rx_packet_size_head] = 0;
 447     s->mac_cmd = 0;
 448     s->mac_data = 0;
 449     s->afc_cfg = 0;
 450     s->e2p_cmd = 0;
 451     s->e2p_data = 0;
 452     s->free_timer_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40;
 453
 454     ptimer_stop(s->timer);
 455     ptimer_set_count(s->timer, 0xffff);
 456     s->gpt_cfg = 0xffff;
 457
 458     s->mac_cr = MAC_CR_PRMS;
 459     s->mac_hashh = 0;
 460     s->mac_hashl = 0;
 461     s->mac_mii_acc = 0;
 462     s->mac_mii_data = 0;
 463     s->mac_flow = 0;
 464
 465     s->read_word_n = 0;
 466     s->write_word_n = 0;
 467
 468     phy_reset(s);
 469
 470     s->eeprom_writable = 0;
 471     lan9118_reload_eeprom(s);
 472 }
 473
 474 static void rx_fifo_push(lan9118_state *s, uint32_t val)
 475 {
 476     int fifo_pos;
 477     fifo_pos = s->rx_fifo_head + s->rx_fifo_used;
 478     if (fifo_pos >= s->rx_fifo_size)
 479       fifo_pos -= s->rx_fifo_size;
 480     s->rx_fifo[fifo_pos] = val;
 481     s->rx_fifo_used++;
 482 }
 483
 484 /* Return nonzero if the packet is accepted by the filter.  */
 485 static int lan9118_filter(lan9118_state *s, const uint8_t *addr)
 486 {
 487     int multicast;
 488     uint32_t hash;
 489
 490     if (s->mac_cr & MAC_CR_PRMS) {
 491         return 1;
 492     }
 493     if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
 494         addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
 495         return (s->mac_cr & MAC_CR_BCAST) == 0;
 496     }
 497
 498     multicast = addr[0] & 1;
 499     if (multicast &&s->mac_cr & MAC_CR_MCPAS) {
 500         return 1;
 501     }
 502     if (multicast ? (s->mac_cr & MAC_CR_HPFILT) == 0
 503                   : (s->mac_cr & MAC_CR_HO) == 0) {
 504         /* Exact matching.  */
 505         hash = memcmp(addr, s->conf.macaddr.a, 6);
 506         if (s->mac_cr & MAC_CR_INVFILT) {
 507             return hash != 0;
 508         } else {
 509             return hash == 0;
 510         }
 511     } else {
 512         /* Hash matching  */
 513         hash = net_crc32(addr, ETH_ALEN) >> 26;
 514         if (hash & 0x20) {
 515             return (s->mac_hashh >> (hash & 0x1f)) & 1;
 516         } else {
 517             return (s->mac_hashl >> (hash & 0x1f)) & 1;
 518         }
 519     }
 520 }
 521
 522 static ssize_t lan9118_receive(NetClientState *nc, const uint8_t *buf,
 523                                size_t size)
 524 {
 525     lan9118_state *s = qemu_get_nic_opaque(nc);
 526     int fifo_len;
 527     int offset;
 528     int src_pos;
 529     int n;
 530     int filter;
 531     uint32_t val;
 532     uint32_t crc;
 533     uint32_t status;
 534
 535     if ((s->mac_cr & MAC_CR_RXEN) == 0) {
 536         return -1;
 537     }
 538
 539     if (size >= 2048 || size < 14) {
 540         return -1;
 541     }
 542
 543     /* TODO: Implement FIFO overflow notification.  */
 544     if (s->rx_status_fifo_used == s->rx_status_fifo_size) {
 545         return -1;
 546     }
 547
 548     filter = lan9118_filter(s, buf);
 549     if (!filter && (s->mac_cr & MAC_CR_RXALL) == 0) {
 550         return size;
 551     }
 552
 553     offset = (s->rx_cfg >> 8) & 0x1f;
 554     n = offset & 3;
 555     fifo_len = (size + n + 3) >> 2;
 556     /* Add a word for the CRC.  */
 557     fifo_len++;
 558     if (s->rx_fifo_size - s->rx_fifo_used < fifo_len) {
 559         return -1;
 560     }
 561
 562     DPRINTF("Got packet len:%d fifo:%d filter:%s\n",
 563             (int)size, fifo_len, filter ? "pass" : "fail");
 564     val = 0;
 565     crc = bswap32(crc32(~0, buf, size));
 566     for (src_pos = 0; src_pos < size; src_pos++) {
 567         val = (val >> 8) | ((uint32_t)buf[src_pos] << 24);
 568         n++;
 569         if (n == 4) {
 570             n = 0;
 571             rx_fifo_push(s, val);
 572             val = 0;
 573         }
 574     }
 575     if (n) {
 576         val >>= ((4 - n) * 8);
 577         val |= crc << (n * 8);
 578         rx_fifo_push(s, val);
 579         val = crc >> ((4 - n) * 8);
 580         rx_fifo_push(s, val);
 581     } else {
 582         rx_fifo_push(s, crc);
 583     }
 584     n = s->rx_status_fifo_head + s->rx_status_fifo_used;
 585     if (n >= s->rx_status_fifo_size) {
 586         n -= s->rx_status_fifo_size;
 587     }
 588     s->rx_packet_size[s->rx_packet_size_tail] = fifo_len;
 589     s->rx_packet_size_tail = (s->rx_packet_size_tail + 1023) & 1023;
 590     s->rx_status_fifo_used++;
 591
 592     status = (size + 4) << 16;
 593     if (buf[0] == 0xff && buf[1] == 0xff && buf[2] == 0xff &&
 594         buf[3] == 0xff && buf[4] == 0xff && buf[5] == 0xff) {
 595         status |= 0x00002000;
 596     } else if (buf[0] & 1) {
 597         status |= 0x00000400;
 598     }
 599     if (!filter) {
 600         status |= 0x40000000;
 601     }
 602     s->rx_status_fifo[n] = status;
 603
 604     if (s->rx_status_fifo_used > (s->fifo_int & 0xff)) {
 605         s->int_sts |= RSFL_INT;
 606     }
 607     lan9118_update(s);
 608
 609     return size;
 610 }
 611
 612 static uint32_t rx_fifo_pop(lan9118_state *s)
 613 {
 614     int n;
 615     uint32_t val;
 616
 617     if (s->rxp_size == 0 && s->rxp_pad == 0) {
 618         s->rxp_size = s->rx_packet_size[s->rx_packet_size_head];
 619         s->rx_packet_size[s->rx_packet_size_head] = 0;
 620         if (s->rxp_size != 0) {
 621             s->rx_packet_size_head = (s->rx_packet_size_head + 1023) & 1023;
 622             s->rxp_offset = (s->rx_cfg >> 10) & 7;
 623             n = s->rxp_offset + s->rxp_size;
 624             switch (s->rx_cfg >> 30) {
 625             case 1:
 626                 n = (-n) & 3;
 627                 break;
 628             case 2:
 629                 n = (-n) & 7;
 630                 break;
 631             default:
 632                 n = 0;
 633                 break;
 634             }
 635             s->rxp_pad = n;
 636             DPRINTF("Pop packet size:%d offset:%d pad: %d\n",
 637                     s->rxp_size, s->rxp_offset, s->rxp_pad);
 638         }
 639     }
 640     if (s->rxp_offset > 0) {
 641         s->rxp_offset--;
 642         val = 0;
 643     } else if (s->rxp_size > 0) {
 644         s->rxp_size--;
 645         val = s->rx_fifo[s->rx_fifo_head++];
 646         if (s->rx_fifo_head >= s->rx_fifo_size) {
 647             s->rx_fifo_head -= s->rx_fifo_size;
 648         }
 649         s->rx_fifo_used--;
 650     } else if (s->rxp_pad > 0) {
 651         s->rxp_pad--;
 652         val =  0;
 653     } else {
 654         DPRINTF("RX underflow\n");
 655         s->int_sts |= RXE_INT;
 656         val =  0;
 657     }
 658     lan9118_update(s);
 659     return val;
 660 }
 661
 662 static void do_tx_packet(lan9118_state *s)
 663 {
 664     int n;
 665     uint32_t status;
 666
 667     /* FIXME: Honor TX disable, and allow queueing of packets.  */
 668     if (s->phy_control & 0x4000)  {
 669         /* This assumes the receive routine doesn't touch the VLANClient.  */
 670         lan9118_receive(qemu_get_queue(s->nic), s->txp->data, s->txp->len);
 671     } else {
 672         qemu_send_packet(qemu_get_queue(s->nic), s->txp->data, s->txp->len);
 673     }
 674     s->txp->fifo_used = 0;
 675
 676     if (s->tx_status_fifo_used == 512) {
 677         /* Status FIFO full */
 678         return;
 679     }
 680     /* Add entry to status FIFO.  */
 681     status = s->txp->cmd_b & 0xffff0000u;
 682     DPRINTF("Sent packet tag:%04x len %d\n", status >> 16, s->txp->len);
 683     n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
 684     s->tx_status_fifo[n] = status;
 685     s->tx_status_fifo_used++;
 686     if (s->tx_status_fifo_used == 512) {
 687         s->int_sts |= TSFF_INT;
 688         /* TODO: Stop transmission.  */
 689     }
 690 }
 691
 692 static uint32_t rx_status_fifo_pop(lan9118_state *s)
 693 {
 694     uint32_t val;
 695
 696     val = s->rx_status_fifo[s->rx_status_fifo_head];
 697     if (s->rx_status_fifo_used != 0) {
 698         s->rx_status_fifo_used--;
 699         s->rx_status_fifo_head++;
 700         if (s->rx_status_fifo_head >= s->rx_status_fifo_size) {
 701             s->rx_status_fifo_head -= s->rx_status_fifo_size;
 702         }
 703         /* ??? What value should be returned when the FIFO is empty?  */
 704         DPRINTF("RX status pop 0x%08x\n", val);
 705     }
 706     return val;
 707 }
 708
 709 static uint32_t tx_status_fifo_pop(lan9118_state *s)
 710 {
 711     uint32_t val;
 712
 713     val = s->tx_status_fifo[s->tx_status_fifo_head];
 714     if (s->tx_status_fifo_used != 0) {
 715         s->tx_status_fifo_used--;
 716         s->tx_status_fifo_head = (s->tx_status_fifo_head + 1) & 511;
 717         /* ??? What value should be returned when the FIFO is empty?  */
 718     }
 719     return val;
 720 }
 721
 722 static void tx_fifo_push(lan9118_state *s, uint32_t val)
 723 {
 724     int n;
 725
 726     if (s->txp->fifo_used == s->tx_fifo_size) {
 727         s->int_sts |= TDFO_INT;
 728         return;
 729     }
 730     switch (s->txp->state) {
 731     case TX_IDLE:
 732         s->txp->cmd_a = val & 0x831f37ff;
 733         s->txp->fifo_used++;
 734         s->txp->state = TX_B;
 735         s->txp->buffer_size = extract32(s->txp->cmd_a, 0, 11);
 736         s->txp->offset = extract32(s->txp->cmd_a, 16, 5);
 737         break;
 738     case TX_B:
 739         if (s->txp->cmd_a & 0x2000) {
 740             /* First segment */
 741             s->txp->cmd_b = val;
 742             s->txp->fifo_used++;
 743             /* End alignment does not include command words.  */
 744             n = (s->txp->buffer_size + s->txp->offset + 3) >> 2;
 745             switch ((n >> 24) & 3) {
 746             case 1:
 747                 n = (-n) & 3;
 748                 break;
 749             case 2:
 750                 n = (-n) & 7;
 751                 break;
 752             default:
 753                 n = 0;
 754             }
 755             s->txp->pad = n;
 756             s->txp->len = 0;
 757         }
 758         DPRINTF("Block len:%d offset:%d pad:%d cmd %08x\n",
 759                 s->txp->buffer_size, s->txp->offset, s->txp->pad,
 760                 s->txp->cmd_a);
 761         s->txp->state = TX_DATA;
 762         break;
 763     case TX_DATA:
 764         if (s->txp->offset >= 4) {
 765             s->txp->offset -= 4;
 766             break;
 767         }
 768         if (s->txp->buffer_size <= 0 && s->txp->pad != 0) {
 769             s->txp->pad--;
 770         } else {
 771             n = MIN(4, s->txp->buffer_size + s->txp->offset);
 772             while (s->txp->offset) {
 773                 val >>= 8;
 774                 n--;
 775                 s->txp->offset--;
 776             }
 777             /* Documentation is somewhat unclear on the ordering of bytes
 778                in FIFO words.  Empirical results show it to be little-endian.
 779                */
 780             /* TODO: FIFO overflow checking.  */
 781             while (n--) {
 782                 s->txp->data[s->txp->len] = val & 0xff;
 783                 s->txp->len++;
 784                 val >>= 8;
 785                 s->txp->buffer_size--;
 786             }
 787             s->txp->fifo_used++;
 788         }
 789         if (s->txp->buffer_size <= 0 && s->txp->pad == 0) {
 790             if (s->txp->cmd_a & 0x1000) {
 791                 do_tx_packet(s);
 792             }
 793             if (s->txp->cmd_a & 0x80000000) {
 794                 s->int_sts |= TX_IOC_INT;
 795             }
 796             s->txp->state = TX_IDLE;
 797         }
 798         break;
 799     }
 800 }
 801
 802 static uint32_t do_phy_read(lan9118_state *s, int reg)
 803 {
 804     uint32_t val;
 805
 806     switch (reg) {
 807     case 0: /* Basic Control */
 808         return s->phy_control;
 809     case 1: /* Basic Status */
 810         return s->phy_status;
 811     case 2: /* ID1 */
 812         return 0x0007;
 813     case 3: /* ID2 */
 814         return 0xc0d1;
 815     case 4: /* Auto-neg advertisement */
 816         return s->phy_advertise;
 817     case 5: /* Auto-neg Link Partner Ability */
 818         return 0x0f71;
 819     case 6: /* Auto-neg Expansion */
 820         return 1;
 821         /* TODO 17, 18, 27, 29, 30, 31 */
 822     case 29: /* Interrupt source.  */
 823         val = s->phy_int;
 824         s->phy_int = 0;
 825         phy_update_irq(s);
 826         return val;
 827     case 30: /* Interrupt mask */
 828         return s->phy_int_mask;
 829     default:
 830         BADF("PHY read reg %d\n", reg);
 831         return 0;
 832     }
 833 }
 834
 835 static void do_phy_write(lan9118_state *s, int reg, uint32_t val)
 836 {
 837     switch (reg) {
 838     case 0: /* Basic Control */
 839         if (val & 0x8000) {
 840             phy_reset(s);
 841             break;
 842         }
 843         s->phy_control = val & 0x7980;
 844         /* Complete autonegotiation immediately.  */
 845         if (val & 0x1000) {
 846             s->phy_status |= 0x0020;
 847         }
 848         break;
 849     case 4: /* Auto-neg advertisement */
 850         s->phy_advertise = (val & 0x2d7f) | 0x80;
 851         break;
 852         /* TODO 17, 18, 27, 31 */
 853     case 30: /* Interrupt mask */
 854         s->phy_int_mask = val & 0xff;
 855         phy_update_irq(s);
 856         break;
 857     default:
 858         BADF("PHY write reg %d = 0x%04x\n", reg, val);
 859     }
 860 }
 861
 862 static void do_mac_write(lan9118_state *s, int reg, uint32_t val)
 863 {
 864     switch (reg) {
 865     case MAC_CR:
 866         if ((s->mac_cr & MAC_CR_RXEN) != 0 && (val & MAC_CR_RXEN) == 0) {
 867             s->int_sts |= RXSTOP_INT;
 868         }
 869         s->mac_cr = val & ~MAC_CR_RESERVED;
 870         DPRINTF("MAC_CR: %08x\n", val);
 871         break;
 872     case MAC_ADDRH:
 873         s->conf.macaddr.a[4] = val & 0xff;
 874         s->conf.macaddr.a[5] = (val >> 8) & 0xff;
 875         lan9118_mac_changed(s);
 876         break;
 877     case MAC_ADDRL:
 878         s->conf.macaddr.a[0] = val & 0xff;
 879         s->conf.macaddr.a[1] = (val >> 8) & 0xff;
 880         s->conf.macaddr.a[2] = (val >> 16) & 0xff;
 881         s->conf.macaddr.a[3] = (val >> 24) & 0xff;
 882         lan9118_mac_changed(s);
 883         break;
 884     case MAC_HASHH:
 885         s->mac_hashh = val;
 886         break;
 887     case MAC_HASHL:
 888         s->mac_hashl = val;
 889         break;
 890     case MAC_MII_ACC:
 891         s->mac_mii_acc = val & 0xffc2;
 892         if (val & 2) {
 893             DPRINTF("PHY write %d = 0x%04x\n",
 894                     (val >> 6) & 0x1f, s->mac_mii_data);
 895             do_phy_write(s, (val >> 6) & 0x1f, s->mac_mii_data);
 896         } else {
 897             s->mac_mii_data = do_phy_read(s, (val >> 6) & 0x1f);
 898             DPRINTF("PHY read %d = 0x%04x\n",
 899                     (val >> 6) & 0x1f, s->mac_mii_data);
 900         }
 901         break;
 902     case MAC_MII_DATA:
 903         s->mac_mii_data = val & 0xffff;
 904         break;
 905     case MAC_FLOW:
 906         s->mac_flow = val & 0xffff0000;
 907         break;
 908     case MAC_VLAN1:
 909         /* Writing to this register changes a condition for
 910          * FrameTooLong bit in rx_status.  Since we do not set
 911          * FrameTooLong anyway, just ignore write to this.
 912          */
 913         break;
 914     default:
 915         qemu_log_mask(LOG_GUEST_ERROR,
 916                       "lan9118: Unimplemented MAC register write: %d = 0x%x\n",
 917                  s->mac_cmd & 0xf, val);
 918     }
 919 }
 920
 921 static uint32_t do_mac_read(lan9118_state *s, int reg)
 922 {
 923     switch (reg) {
 924     case MAC_CR:
 925         return s->mac_cr;
 926     case MAC_ADDRH:
 927         return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8);
 928     case MAC_ADDRL:
 929         return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8)
 930                | (s->conf.macaddr.a[2] << 16) | (s->conf.macaddr.a[3] << 24);
 931     case MAC_HASHH:
 932         return s->mac_hashh;
 933         break;
 934     case MAC_HASHL:
 935         return s->mac_hashl;
 936         break;
 937     case MAC_MII_ACC:
 938         return s->mac_mii_acc;
 939     case MAC_MII_DATA:
 940         return s->mac_mii_data;
 941     case MAC_FLOW:
 942         return s->mac_flow;
 943     default:
 944         qemu_log_mask(LOG_GUEST_ERROR,
 945                       "lan9118: Unimplemented MAC register read: %d\n",
 946                  s->mac_cmd & 0xf);
 947         return 0;
 948     }
 949 }
 950
 951 static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
 952 {
 953     s->e2p_cmd = (s->e2p_cmd & E2P_CMD_MAC_ADDR_LOADED) | (cmd << 28) | addr;
 954     switch (cmd) {
 955     case 0:
 956         s->e2p_data = s->eeprom[addr];
 957         DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
 958         break;
 959     case 1:
 960         s->eeprom_writable = 0;
 961         DPRINTF("EEPROM Write Disable\n");
 962         break;
 963     case 2: /* EWEN */
 964         s->eeprom_writable = 1;
 965         DPRINTF("EEPROM Write Enable\n");
 966         break;
 967     case 3: /* WRITE */
 968         if (s->eeprom_writable) {
 969             s->eeprom[addr] &= s->e2p_data;
 970             DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
 971         } else {
 972             DPRINTF("EEPROM Write %d (ignored)\n", addr);
 973         }
 974         break;
 975     case 4: /* WRAL */
 976         if (s->eeprom_writable) {
 977             for (addr = 0; addr < 128; addr++) {
 978                 s->eeprom[addr] &= s->e2p_data;
 979             }
 980             DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
 981         } else {
 982             DPRINTF("EEPROM Write All (ignored)\n");
 983         }
 984         break;
 985     case 5: /* ERASE */
 986         if (s->eeprom_writable) {
 987             s->eeprom[addr] = 0xff;
 988             DPRINTF("EEPROM Erase %d\n", addr);
 989         } else {
 990             DPRINTF("EEPROM Erase %d (ignored)\n", addr);
 991         }
 992         break;
 993     case 6: /* ERAL */
 994         if (s->eeprom_writable) {
 995             memset(s->eeprom, 0xff, 128);
 996             DPRINTF("EEPROM Erase All\n");
 997         } else {
 998             DPRINTF("EEPROM Erase All (ignored)\n");
 999         }
1000         break;
1001     case 7: /* RELOAD */
1002         lan9118_reload_eeprom(s);
1003         break;
1004     }
1005 }
1006
1007 static void lan9118_tick(void *opaque)
1008 {
1009     lan9118_state *s = (lan9118_state *)opaque;
1010     if (s->int_en & GPT_INT) {
1011         s->int_sts |= GPT_INT;
1012     }
1013     lan9118_update(s);
1014 }
1015
1016 static void lan9118_writel(void *opaque, hwaddr offset,
1017                            uint64_t val, unsigned size)
1018 {
1019     lan9118_state *s = (lan9118_state *)opaque;
1020     offset &= 0xff;
1021
1022     //DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
1023     if (offset >= 0x20 && offset < 0x40) {
1024         /* TX FIFO */
1025         tx_fifo_push(s, val);
1026         return;
1027     }
1028     switch (offset) {
1029     case CSR_IRQ_CFG:
1030         /* TODO: Implement interrupt deassertion intervals.  */
1031         val &= (IRQ_EN | IRQ_POL | IRQ_TYPE);
1032         s->irq_cfg = (s->irq_cfg & IRQ_INT) | val;
1033         break;
1034     case CSR_INT_STS:
1035         s->int_sts &= ~val;
1036         break;
1037     case CSR_INT_EN:
1038         s->int_en = val & ~RESERVED_INT;
1039         s->int_sts |= val & SW_INT;
1040         break;
1041     case CSR_FIFO_INT:
1042         DPRINTF("FIFO INT levels %08x\n", val);
1043         s->fifo_int = val;
1044         break;
1045     case CSR_RX_CFG:
1046         if (val & 0x8000) {
1047             /* RX_DUMP */
1048             s->rx_fifo_used = 0;
1049             s->rx_status_fifo_used = 0;
1050             s->rx_packet_size_tail = s->rx_packet_size_head;
1051             s->rx_packet_size[s->rx_packet_size_head] = 0;
1052         }
1053         s->rx_cfg = val & 0xcfff1ff0;
1054         break;
1055     case CSR_TX_CFG:
1056         if (val & 0x8000) {
1057             s->tx_status_fifo_used = 0;
1058         }
1059         if (val & 0x4000) {
1060             s->txp->state = TX_IDLE;
1061             s->txp->fifo_used = 0;
1062             s->txp->cmd_a = 0xffffffff;
1063         }
1064         s->tx_cfg = val & 6;
1065         break;
1066     case CSR_HW_CFG:
1067         if (val & 1) {
1068             /* SRST */
1069             lan9118_reset(DEVICE(s));
1070         } else {
1071             s->hw_cfg = (val & 0x003f300) | (s->hw_cfg & 0x4);
1072         }
1073         break;
1074     case CSR_RX_DP_CTRL:
1075         if (val & 0x80000000) {
1076             /* Skip forward to next packet.  */
1077             s->rxp_pad = 0;
1078             s->rxp_offset = 0;
1079             if (s->rxp_size == 0) {
1080                 /* Pop a word to start the next packet.  */
1081                 rx_fifo_pop(s);
1082                 s->rxp_pad = 0;
1083                 s->rxp_offset = 0;
1084             }
1085             s->rx_fifo_head += s->rxp_size;
1086             if (s->rx_fifo_head >= s->rx_fifo_size) {
1087                 s->rx_fifo_head -= s->rx_fifo_size;
1088             }
1089         }
1090         break;
1091     case CSR_PMT_CTRL:
1092         if (val & 0x400) {
1093             phy_reset(s);
1094         }
1095         s->pmt_ctrl &= ~0x34e;
1096         s->pmt_ctrl |= (val & 0x34e);
1097         break;
1098     case CSR_GPIO_CFG:
1099         /* Probably just enabling LEDs.  */
1100         s->gpio_cfg = val & 0x7777071f;
1101         break;
1102     case CSR_GPT_CFG:
1103         if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
1104             if (val & GPT_TIMER_EN) {
1105                 ptimer_set_count(s->timer, val & 0xffff);
1106                 ptimer_run(s->timer, 0);
1107             } else {
1108                 ptimer_stop(s->timer);
1109                 ptimer_set_count(s->timer, 0xffff);
1110             }
1111         }
1112         s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
1113         break;
1114     case CSR_WORD_SWAP:
1115         /* Ignored because we're in 32-bit mode.  */
1116         s->word_swap = val;
1117         break;
1118     case CSR_MAC_CSR_CMD:
1119         s->mac_cmd = val & 0x4000000f;
1120         if (val & 0x80000000) {
1121             if (val & 0x40000000) {
1122                 s->mac_data = do_mac_read(s, val & 0xf);
1123                 DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data);
1124             } else {
1125                 DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data);
1126                 do_mac_write(s, val & 0xf, s->mac_data);
1127             }
1128         }
1129         break;
1130     case CSR_MAC_CSR_DATA:
1131         s->mac_data = val;
1132         break;
1133     case CSR_AFC_CFG:
1134         s->afc_cfg = val & 0x00ffffff;
1135         break;
1136     case CSR_E2P_CMD:
1137         lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0x7f);
1138         break;
1139     case CSR_E2P_DATA:
1140         s->e2p_data = val & 0xff;
1141         break;
1142
1143     default:
1144         qemu_log_mask(LOG_GUEST_ERROR, "lan9118_write: Bad reg 0x%x = %x\n",
1145                       (int)offset, (int)val);
1146         break;
1147     }
1148     lan9118_update(s);
1149 }
1150
1151 static void lan9118_writew(void *opaque, hwaddr offset,
1152                            uint32_t val)
1153 {
1154     lan9118_state *s = (lan9118_state *)opaque;
1155     offset &= 0xff;
1156
1157     if (s->write_word_prev_offset != (offset & ~0x3)) {
1158         /* New offset, reset word counter */
1159         s->write_word_n = 0;
1160         s->write_word_prev_offset = offset & ~0x3;
1161     }
1162
1163     if (offset & 0x2) {
1164         s->write_word_h = val;
1165     } else {
1166         s->write_word_l = val;
1167     }
1168
1169     //DPRINTF("Writew reg 0x%02x = 0x%08x\n", (int)offset, val);
1170     s->write_word_n++;
1171     if (s->write_word_n == 2) {
1172         s->write_word_n = 0;
1173         lan9118_writel(s, offset & ~3, s->write_word_l +
1174                 (s->write_word_h << 16), 4);
1175     }
1176 }
1177
1178 static void lan9118_16bit_mode_write(void *opaque, hwaddr offset,
1179                                      uint64_t val, unsigned size)
1180 {
1181     switch (size) {
1182     case 2:
1183         lan9118_writew(opaque, offset, (uint32_t)val);
1184         return;
1185     case 4:
1186         lan9118_writel(opaque, offset, val, size);
1187         return;
1188     }
1189
1190     hw_error("lan9118_write: Bad size 0x%x\n", size);
1191 }
1192
1193 static uint64_t lan9118_readl(void *opaque, hwaddr offset,
1194                               unsigned size)
1195 {
1196     lan9118_state *s = (lan9118_state *)opaque;
1197
1198     //DPRINTF("Read reg 0x%02x\n", (int)offset);
1199     if (offset < 0x20) {
1200         /* RX FIFO */
1201         return rx_fifo_pop(s);
1202     }
1203     switch (offset) {
1204     case 0x40:
1205         return rx_status_fifo_pop(s);
1206     case 0x44:
1207         return s->rx_status_fifo[s->tx_status_fifo_head];
1208     case 0x48:
1209         return tx_status_fifo_pop(s);
1210     case 0x4c:
1211         return s->tx_status_fifo[s->tx_status_fifo_head];
1212     case CSR_ID_REV:
1213         return 0x01180001;
1214     case CSR_IRQ_CFG:
1215         return s->irq_cfg;
1216     case CSR_INT_STS:
1217         return s->int_sts;
1218     case CSR_INT_EN:
1219         return s->int_en;
1220     case CSR_BYTE_TEST:
1221         return 0x87654321;
1222     case CSR_FIFO_INT:
1223         return s->fifo_int;
1224     case CSR_RX_CFG:
1225         return s->rx_cfg;
1226     case CSR_TX_CFG:
1227         return s->tx_cfg;
1228     case CSR_HW_CFG:
1229         return s->hw_cfg;
1230     case CSR_RX_DP_CTRL:
1231         return 0;
1232     case CSR_RX_FIFO_INF:
1233         return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2);
1234     case CSR_TX_FIFO_INF:
1235         return (s->tx_status_fifo_used << 16)
1236                | (s->tx_fifo_size - s->txp->fifo_used);
1237     case CSR_PMT_CTRL:
1238         return s->pmt_ctrl;
1239     case CSR_GPIO_CFG:
1240         return s->gpio_cfg;
1241     case CSR_GPT_CFG:
1242         return s->gpt_cfg;
1243     case CSR_GPT_CNT:
1244         return ptimer_get_count(s->timer);
1245     case CSR_WORD_SWAP:
1246         return s->word_swap;
1247     case CSR_FREE_RUN:
1248         return (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / 40) - s->free_timer_start;
1249     case CSR_RX_DROP:
1250         /* TODO: Implement dropped frames counter.  */
1251         return 0;
1252     case CSR_MAC_CSR_CMD:
1253         return s->mac_cmd;
1254     case CSR_MAC_CSR_DATA:
1255         return s->mac_data;
1256     case CSR_AFC_CFG:
1257         return s->afc_cfg;
1258     case CSR_E2P_CMD:
1259         return s->e2p_cmd;
1260     case CSR_E2P_DATA:
1261         return s->e2p_data;
1262     }
1263     qemu_log_mask(LOG_GUEST_ERROR, "lan9118_read: Bad reg 0x%x\n", (int)offset);
1264     return 0;
1265 }
1266
1267 static uint32_t lan9118_readw(void *opaque, hwaddr offset)
1268 {
1269     lan9118_state *s = (lan9118_state *)opaque;
1270     uint32_t val;
1271
1272     if (s->read_word_prev_offset != (offset & ~0x3)) {
1273         /* New offset, reset word counter */
1274         s->read_word_n = 0;
1275         s->read_word_prev_offset = offset & ~0x3;
1276     }
1277
1278     s->read_word_n++;
1279     if (s->read_word_n == 1) {
1280         s->read_long = lan9118_readl(s, offset & ~3, 4);
1281     } else {
1282         s->read_word_n = 0;
1283     }
1284
1285     if (offset & 2) {
1286         val = s->read_long >> 16;
1287     } else {
1288         val = s->read_long & 0xFFFF;
1289     }
1290
1291     //DPRINTF("Readw reg 0x%02x, val 0x%x\n", (int)offset, val);
1292     return val;
1293 }
1294
1295 static uint64_t lan9118_16bit_mode_read(void *opaque, hwaddr offset,
1296                                         unsigned size)
1297 {
1298     switch (size) {
1299     case 2:
1300         return lan9118_readw(opaque, offset);
1301     case 4:
1302         return lan9118_readl(opaque, offset, size);
1303     }
1304
1305     hw_error("lan9118_read: Bad size 0x%x\n", size);
1306     return 0;
1307 }
1308
1309 static const MemoryRegionOps lan9118_mem_ops = {
1310     .read = lan9118_readl,
1311     .write = lan9118_writel,
1312     .endianness = DEVICE_NATIVE_ENDIAN,
1313 };
1314
1315 static const MemoryRegionOps lan9118_16bit_mem_ops = {
1316     .read = lan9118_16bit_mode_read,
1317     .write = lan9118_16bit_mode_write,
1318     .endianness = DEVICE_NATIVE_ENDIAN,
1319 };
1320
1321 static NetClientInfo net_lan9118_info = {
1322     .type = NET_CLIENT_DRIVER_NIC,
1323     .size = sizeof(NICState),
1324     .receive = lan9118_receive,
1325     .link_status_changed = lan9118_set_link,
1326 };
1327
1328 static void lan9118_realize(DeviceState *dev, Error **errp)
1329 {
1330     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
1331     lan9118_state *s = LAN9118(dev);
1332     QEMUBH *bh;
1333     int i;
1334     const MemoryRegionOps *mem_ops =
1335             s->mode_16bit ? &lan9118_16bit_mem_ops : &lan9118_mem_ops;
1336
1337     memory_region_init_io(&s->mmio, OBJECT(dev), mem_ops, s,
1338                           "lan9118-mmio", 0x100);
1339     sysbus_init_mmio(sbd, &s->mmio);
1340     sysbus_init_irq(sbd, &s->irq);
1341     qemu_macaddr_default_if_unset(&s->conf.macaddr);
1342
1343     s->nic = qemu_new_nic(&net_lan9118_info, &s->conf,
1344                           object_get_typename(OBJECT(dev)), dev->id, s);
1345     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1346     s->eeprom[0] = 0xa5;
1347     for (i = 0; i < 6; i++) {
1348         s->eeprom[i + 1] = s->conf.macaddr.a[i];
1349     }
1350     s->pmt_ctrl = 1;
1351     s->txp = &s->tx_packet;
1352
1353     bh = qemu_bh_new(lan9118_tick, s);
1354     s->timer = ptimer_init(bh, PTIMER_POLICY_DEFAULT);
1355     ptimer_set_freq(s->timer, 10000);
1356     ptimer_set_limit(s->timer, 0xffff, 1);
1357 }
1358
1359 static Property lan9118_properties[] = {
1360     DEFINE_NIC_PROPERTIES(lan9118_state, conf),
1361     DEFINE_PROP_UINT32("mode_16bit", lan9118_state, mode_16bit, 0),
1362     DEFINE_PROP_END_OF_LIST(),
1363 };
1364
1365 static void lan9118_class_init(ObjectClass *klass, void *data)
1366 {
1367     DeviceClass *dc = DEVICE_CLASS(klass);
1368
1369     dc->reset = lan9118_reset;
1370     dc->props = lan9118_properties;
1371     dc->vmsd = &vmstate_lan9118;
1372     dc->realize = lan9118_realize;
1373 }
1374
1375 static const TypeInfo lan9118_info = {
1376     .name          = TYPE_LAN9118,
1377     .parent        = TYPE_SYS_BUS_DEVICE,
1378     .instance_size = sizeof(lan9118_state),
1379     .class_init    = lan9118_class_init,
1380 };
1381
1382 static void lan9118_register_types(void)
1383 {
1384     type_register_static(&lan9118_info);
1385 }
1386
1387 /* Legacy helper function.  Should go away when machine config files are
1388    implemented.  */
1389 void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
1390 {
1391     DeviceState *dev;
1392     SysBusDevice *s;
1393
1394     qemu_check_nic_model(nd, "lan9118");
1395     dev = qdev_create(NULL, TYPE_LAN9118);
1396     qdev_set_nic_properties(dev, nd);
1397     qdev_init_nofail(dev);
1398     s = SYS_BUS_DEVICE(dev);
1399     sysbus_mmio_map(s, 0, base);
1400     sysbus_connect_irq(s, 0, irq);
1401 }
1402
1403 type_init(lan9118_register_types)