1 /* 2 * QEMU Freescale eTSEC Emulator 3 * 4 * Copyright (c) 2011-2013 AdaCore 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 /* 26 * This implementation doesn't include ring priority, TCP/IP Off-Load, QoS. 27 */ 28 29 #include "qemu/osdep.h" 30 #include "hw/sysbus.h" 31 #include "hw/irq.h" 32 #include "hw/ptimer.h" 33 #include "hw/qdev-properties.h" 34 #include "etsec.h" 35 #include "registers.h" 36 #include "qemu/log.h" 37 #include "qemu/module.h" 38 39 /* #define HEX_DUMP */ 40 /* #define DEBUG_REGISTER */ 41 42 #ifdef DEBUG_REGISTER 43 static const int debug_etsec = 1; 44 #else 45 static const int debug_etsec; 46 #endif 47 48 #define DPRINTF(fmt, ...) do { \ 49 if (debug_etsec) { \ 50 qemu_log(fmt , ## __VA_ARGS__); \ 51 } \ 52 } while (0) 53 54 /* call after any change to IEVENT or IMASK */ 55 void etsec_update_irq(eTSEC *etsec) 56 { 57 uint32_t ievent = etsec->regs[IEVENT].value; 58 uint32_t imask = etsec->regs[IMASK].value; 59 uint32_t active = ievent & imask; 60 61 int tx = !!(active & IEVENT_TX_MASK); 62 int rx = !!(active & IEVENT_RX_MASK); 63 int err = !!(active & IEVENT_ERR_MASK); 64 65 DPRINTF("%s IRQ ievent=%"PRIx32" imask=%"PRIx32" %c%c%c", 66 __func__, ievent, imask, 67 tx ? 'T' : '_', 68 rx ? 'R' : '_', 69 err ? 'E' : '_'); 70 71 qemu_set_irq(etsec->tx_irq, tx); 72 qemu_set_irq(etsec->rx_irq, rx); 73 qemu_set_irq(etsec->err_irq, err); 74 } 75 76 static uint64_t etsec_read(void *opaque, hwaddr addr, unsigned size) 77 { 78 eTSEC *etsec = opaque; 79 uint32_t reg_index = addr / 4; 80 eTSEC_Register *reg = NULL; 81 uint32_t ret = 0x0; 82 83 assert(reg_index < ETSEC_REG_NUMBER); 84 85 reg = &etsec->regs[reg_index]; 86 87 88 switch (reg->access) { 89 case ACC_WO: 90 ret = 0x00000000; 91 break; 92 93 case ACC_RW: 94 case ACC_W1C: 95 case ACC_RO: 96 default: 97 ret = reg->value; 98 break; 99 } 100 101 DPRINTF("Read 0x%08x @ 0x" TARGET_FMT_plx 102 " : %s (%s)\n", 103 ret, addr, reg->name, reg->desc); 104 105 return ret; 106 } 107 108 static void write_tstat(eTSEC *etsec, 109 eTSEC_Register *reg, 110 uint32_t reg_index, 111 uint32_t value) 112 { 113 int i = 0; 114 115 for (i = 0; i < 8; i++) { 116 /* Check THLTi flag in TSTAT */ 117 if (value & (1 << (31 - i))) { 118 etsec_walk_tx_ring(etsec, i); 119 } 120 } 121 122 /* Write 1 to clear */ 123 reg->value &= ~value; 124 } 125 126 static void write_rstat(eTSEC *etsec, 127 eTSEC_Register *reg, 128 uint32_t reg_index, 129 uint32_t value) 130 { 131 int i = 0; 132 133 for (i = 0; i < 8; i++) { 134 /* Check QHLTi flag in RSTAT */ 135 if (value & (1 << (23 - i)) && !(reg->value & (1 << (23 - i)))) { 136 etsec_walk_rx_ring(etsec, i); 137 } 138 } 139 140 /* Write 1 to clear */ 141 reg->value &= ~value; 142 } 143 144 static void write_tbasex(eTSEC *etsec, 145 eTSEC_Register *reg, 146 uint32_t reg_index, 147 uint32_t value) 148 { 149 reg->value = value & ~0x7; 150 151 /* Copy this value in the ring's TxBD pointer */ 152 etsec->regs[TBPTR0 + (reg_index - TBASE0)].value = value & ~0x7; 153 } 154 155 static void write_rbasex(eTSEC *etsec, 156 eTSEC_Register *reg, 157 uint32_t reg_index, 158 uint32_t value) 159 { 160 reg->value = value & ~0x7; 161 162 /* Copy this value in the ring's RxBD pointer */ 163 etsec->regs[RBPTR0 + (reg_index - RBASE0)].value = value & ~0x7; 164 } 165 166 static void write_dmactrl(eTSEC *etsec, 167 eTSEC_Register *reg, 168 uint32_t reg_index, 169 uint32_t value) 170 { 171 reg->value = value; 172 173 if (value & DMACTRL_GRS) { 174 175 if (etsec->rx_buffer_len != 0) { 176 /* Graceful receive stop delayed until end of frame */ 177 } else { 178 /* Graceful receive stop now */ 179 etsec->regs[IEVENT].value |= IEVENT_GRSC; 180 etsec_update_irq(etsec); 181 } 182 } 183 184 if (value & DMACTRL_GTS) { 185 186 if (etsec->tx_buffer_len != 0) { 187 /* Graceful transmit stop delayed until end of frame */ 188 } else { 189 /* Graceful transmit stop now */ 190 etsec->regs[IEVENT].value |= IEVENT_GTSC; 191 etsec_update_irq(etsec); 192 } 193 } 194 195 if (!(value & DMACTRL_WOP)) { 196 /* Start polling */ 197 ptimer_transaction_begin(etsec->ptimer); 198 ptimer_stop(etsec->ptimer); 199 ptimer_set_count(etsec->ptimer, 1); 200 ptimer_run(etsec->ptimer, 1); 201 ptimer_transaction_commit(etsec->ptimer); 202 } 203 } 204 205 static void etsec_write(void *opaque, 206 hwaddr addr, 207 uint64_t value, 208 unsigned size) 209 { 210 eTSEC *etsec = opaque; 211 uint32_t reg_index = addr / 4; 212 eTSEC_Register *reg = NULL; 213 uint32_t before = 0x0; 214 215 assert(reg_index < ETSEC_REG_NUMBER); 216 217 reg = &etsec->regs[reg_index]; 218 before = reg->value; 219 220 switch (reg_index) { 221 case IEVENT: 222 /* Write 1 to clear */ 223 reg->value &= ~value; 224 225 etsec_update_irq(etsec); 226 break; 227 228 case IMASK: 229 reg->value = value; 230 231 etsec_update_irq(etsec); 232 break; 233 234 case DMACTRL: 235 write_dmactrl(etsec, reg, reg_index, value); 236 break; 237 238 case TSTAT: 239 write_tstat(etsec, reg, reg_index, value); 240 break; 241 242 case RSTAT: 243 write_rstat(etsec, reg, reg_index, value); 244 break; 245 246 case TBASE0 ... TBASE7: 247 write_tbasex(etsec, reg, reg_index, value); 248 break; 249 250 case RBASE0 ... RBASE7: 251 write_rbasex(etsec, reg, reg_index, value); 252 break; 253 254 case MIIMCFG ... MIIMIND: 255 etsec_write_miim(etsec, reg, reg_index, value); 256 break; 257 258 default: 259 /* Default handling */ 260 switch (reg->access) { 261 262 case ACC_RW: 263 case ACC_WO: 264 reg->value = value; 265 break; 266 267 case ACC_W1C: 268 reg->value &= ~value; 269 break; 270 271 case ACC_RO: 272 default: 273 /* Read Only or Unknown register */ 274 break; 275 } 276 } 277 278 DPRINTF("Write 0x%08x @ 0x" TARGET_FMT_plx 279 " val:0x%08x->0x%08x : %s (%s)\n", 280 (unsigned int)value, addr, before, reg->value, 281 reg->name, reg->desc); 282 } 283 284 static const MemoryRegionOps etsec_ops = { 285 .read = etsec_read, 286 .write = etsec_write, 287 .endianness = DEVICE_NATIVE_ENDIAN, 288 .impl = { 289 .min_access_size = 4, 290 .max_access_size = 4, 291 }, 292 }; 293 294 static void etsec_timer_hit(void *opaque) 295 { 296 eTSEC *etsec = opaque; 297 298 ptimer_stop(etsec->ptimer); 299 300 if (!(etsec->regs[DMACTRL].value & DMACTRL_WOP)) { 301 302 if (!(etsec->regs[DMACTRL].value & DMACTRL_GTS)) { 303 etsec_walk_tx_ring(etsec, 0); 304 } 305 ptimer_set_count(etsec->ptimer, 1); 306 ptimer_run(etsec->ptimer, 1); 307 } 308 } 309 310 static void etsec_reset(DeviceState *d) 311 { 312 eTSEC *etsec = ETSEC_COMMON(d); 313 int i = 0; 314 int reg_index = 0; 315 316 /* Default value for all registers */ 317 for (i = 0; i < ETSEC_REG_NUMBER; i++) { 318 etsec->regs[i].name = "Reserved"; 319 etsec->regs[i].desc = ""; 320 etsec->regs[i].access = ACC_UNKNOWN; 321 etsec->regs[i].value = 0x00000000; 322 } 323 324 /* Set-up known registers */ 325 for (i = 0; eTSEC_registers_def[i].name != NULL; i++) { 326 327 reg_index = eTSEC_registers_def[i].offset / 4; 328 329 etsec->regs[reg_index].name = eTSEC_registers_def[i].name; 330 etsec->regs[reg_index].desc = eTSEC_registers_def[i].desc; 331 etsec->regs[reg_index].access = eTSEC_registers_def[i].access; 332 etsec->regs[reg_index].value = eTSEC_registers_def[i].reset; 333 } 334 335 etsec->tx_buffer = NULL; 336 etsec->tx_buffer_len = 0; 337 etsec->rx_buffer = NULL; 338 etsec->rx_buffer_len = 0; 339 340 etsec->phy_status = 341 MII_SR_EXTENDED_CAPS | MII_SR_LINK_STATUS | MII_SR_AUTONEG_CAPS | 342 MII_SR_AUTONEG_COMPLETE | MII_SR_PREAMBLE_SUPPRESS | 343 MII_SR_EXTENDED_STATUS | MII_SR_100T2_HD_CAPS | MII_SR_100T2_FD_CAPS | 344 MII_SR_10T_HD_CAPS | MII_SR_10T_FD_CAPS | MII_SR_100X_HD_CAPS | 345 MII_SR_100X_FD_CAPS | MII_SR_100T4_CAPS; 346 347 etsec_update_irq(etsec); 348 } 349 350 static ssize_t etsec_receive(NetClientState *nc, 351 const uint8_t *buf, 352 size_t size) 353 { 354 ssize_t ret; 355 eTSEC *etsec = qemu_get_nic_opaque(nc); 356 357 #if defined(HEX_DUMP) 358 fprintf(stderr, "%s receive size:%zd\n", nc->name, size); 359 qemu_hexdump((void *)buf, stderr, "", size); 360 #endif 361 /* Flush is unnecessary as are already in receiving path */ 362 etsec->need_flush = false; 363 ret = etsec_rx_ring_write(etsec, buf, size); 364 if (ret == 0) { 365 /* The packet will be queued, let's flush it when buffer is available 366 * again. */ 367 etsec->need_flush = true; 368 } 369 return ret; 370 } 371 372 373 static void etsec_set_link_status(NetClientState *nc) 374 { 375 eTSEC *etsec = qemu_get_nic_opaque(nc); 376 377 etsec_miim_link_status(etsec, nc); 378 } 379 380 static NetClientInfo net_etsec_info = { 381 .type = NET_CLIENT_DRIVER_NIC, 382 .size = sizeof(NICState), 383 .receive = etsec_receive, 384 .link_status_changed = etsec_set_link_status, 385 }; 386 387 static void etsec_realize(DeviceState *dev, Error **errp) 388 { 389 eTSEC *etsec = ETSEC_COMMON(dev); 390 391 etsec->nic = qemu_new_nic(&net_etsec_info, &etsec->conf, 392 object_get_typename(OBJECT(dev)), dev->id, etsec); 393 qemu_format_nic_info_str(qemu_get_queue(etsec->nic), etsec->conf.macaddr.a); 394 395 etsec->ptimer = ptimer_init(etsec_timer_hit, etsec, PTIMER_POLICY_DEFAULT); 396 ptimer_transaction_begin(etsec->ptimer); 397 ptimer_set_freq(etsec->ptimer, 100); 398 ptimer_transaction_commit(etsec->ptimer); 399 } 400 401 static void etsec_instance_init(Object *obj) 402 { 403 eTSEC *etsec = ETSEC_COMMON(obj); 404 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 405 406 memory_region_init_io(&etsec->io_area, OBJECT(etsec), &etsec_ops, etsec, 407 "eTSEC", 0x1000); 408 sysbus_init_mmio(sbd, &etsec->io_area); 409 410 sysbus_init_irq(sbd, &etsec->tx_irq); 411 sysbus_init_irq(sbd, &etsec->rx_irq); 412 sysbus_init_irq(sbd, &etsec->err_irq); 413 } 414 415 static Property etsec_properties[] = { 416 DEFINE_NIC_PROPERTIES(eTSEC, conf), 417 DEFINE_PROP_END_OF_LIST(), 418 }; 419 420 static void etsec_class_init(ObjectClass *klass, void *data) 421 { 422 DeviceClass *dc = DEVICE_CLASS(klass); 423 424 dc->realize = etsec_realize; 425 dc->reset = etsec_reset; 426 dc->props = etsec_properties; 427 /* Supported by ppce500 machine */ 428 dc->user_creatable = true; 429 } 430 431 static TypeInfo etsec_info = { 432 .name = "eTSEC", 433 .parent = TYPE_SYS_BUS_DEVICE, 434 .instance_size = sizeof(eTSEC), 435 .class_init = etsec_class_init, 436 .instance_init = etsec_instance_init, 437 }; 438 439 static void etsec_register_types(void) 440 { 441 type_register_static(&etsec_info); 442 } 443 444 type_init(etsec_register_types) 445 446 DeviceState *etsec_create(hwaddr base, 447 MemoryRegion * mr, 448 NICInfo * nd, 449 qemu_irq tx_irq, 450 qemu_irq rx_irq, 451 qemu_irq err_irq) 452 { 453 DeviceState *dev; 454 455 dev = qdev_create(NULL, "eTSEC"); 456 qdev_set_nic_properties(dev, nd); 457 qdev_init_nofail(dev); 458 459 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, tx_irq); 460 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, rx_irq); 461 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 2, err_irq); 462 463 memory_region_add_subregion(mr, base, 464 SYS_BUS_DEVICE(dev)->mmio[0].memory); 465 466 return dev; 467 } 468