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/net/mii.h" 33 #include "hw/ptimer.h" 34 #include "hw/qdev-properties.h" 35 #include "etsec.h" 36 #include "registers.h" 37 #include "qapi/error.h" 38 #include "qemu/log.h" 39 #include "qemu/module.h" 40 41 /* #define HEX_DUMP */ 42 /* #define DEBUG_REGISTER */ 43 44 #ifdef DEBUG_REGISTER 45 static const int debug_etsec = 1; 46 #else 47 static const int debug_etsec; 48 #endif 49 50 #define DPRINTF(fmt, ...) do { \ 51 if (debug_etsec) { \ 52 qemu_log(fmt , ## __VA_ARGS__); \ 53 } \ 54 } while (0) 55 56 /* call after any change to IEVENT or IMASK */ 57 void etsec_update_irq(eTSEC *etsec) 58 { 59 uint32_t ievent = etsec->regs[IEVENT].value; 60 uint32_t imask = etsec->regs[IMASK].value; 61 uint32_t active = ievent & imask; 62 63 int tx = !!(active & IEVENT_TX_MASK); 64 int rx = !!(active & IEVENT_RX_MASK); 65 int err = !!(active & IEVENT_ERR_MASK); 66 67 DPRINTF("%s IRQ ievent=%"PRIx32" imask=%"PRIx32" %c%c%c", 68 __func__, ievent, imask, 69 tx ? 'T' : '_', 70 rx ? 'R' : '_', 71 err ? 'E' : '_'); 72 73 qemu_set_irq(etsec->tx_irq, tx); 74 qemu_set_irq(etsec->rx_irq, rx); 75 qemu_set_irq(etsec->err_irq, err); 76 } 77 78 static uint64_t etsec_read(void *opaque, hwaddr addr, unsigned size) 79 { 80 eTSEC *etsec = opaque; 81 uint32_t reg_index = addr / 4; 82 eTSEC_Register *reg = NULL; 83 uint32_t ret = 0x0; 84 85 assert(reg_index < ETSEC_REG_NUMBER); 86 87 reg = &etsec->regs[reg_index]; 88 89 90 switch (reg->access) { 91 case ACC_WO: 92 ret = 0x00000000; 93 break; 94 95 case ACC_RW: 96 case ACC_W1C: 97 case ACC_RO: 98 default: 99 ret = reg->value; 100 break; 101 } 102 103 DPRINTF("Read 0x%08x @ 0x" HWADDR_FMT_plx 104 " : %s (%s)\n", 105 ret, addr, reg->name, reg->desc); 106 107 return ret; 108 } 109 110 static void write_tstat(eTSEC *etsec, 111 eTSEC_Register *reg, 112 uint32_t reg_index, 113 uint32_t value) 114 { 115 int i = 0; 116 117 for (i = 0; i < 8; i++) { 118 /* Check THLTi flag in TSTAT */ 119 if (value & (1 << (31 - i))) { 120 etsec_walk_tx_ring(etsec, i); 121 } 122 } 123 124 /* Write 1 to clear */ 125 reg->value &= ~value; 126 } 127 128 static void write_rstat(eTSEC *etsec, 129 eTSEC_Register *reg, 130 uint32_t reg_index, 131 uint32_t value) 132 { 133 int i = 0; 134 135 for (i = 0; i < 8; i++) { 136 /* Check QHLTi flag in RSTAT */ 137 if (value & (1 << (23 - i)) && !(reg->value & (1 << (23 - i)))) { 138 etsec_walk_rx_ring(etsec, i); 139 } 140 } 141 142 /* Write 1 to clear */ 143 reg->value &= ~value; 144 } 145 146 static void write_tbasex(eTSEC *etsec, 147 eTSEC_Register *reg, 148 uint32_t reg_index, 149 uint32_t value) 150 { 151 reg->value = value & ~0x7; 152 153 /* Copy this value in the ring's TxBD pointer */ 154 etsec->regs[TBPTR0 + (reg_index - TBASE0)].value = value & ~0x7; 155 } 156 157 static void write_rbasex(eTSEC *etsec, 158 eTSEC_Register *reg, 159 uint32_t reg_index, 160 uint32_t value) 161 { 162 reg->value = value & ~0x7; 163 164 /* Copy this value in the ring's RxBD pointer */ 165 etsec->regs[RBPTR0 + (reg_index - RBASE0)].value = value & ~0x7; 166 } 167 168 static void write_dmactrl(eTSEC *etsec, 169 eTSEC_Register *reg, 170 uint32_t reg_index, 171 uint32_t value) 172 { 173 reg->value = value; 174 175 if (value & DMACTRL_GRS) { 176 177 if (etsec->rx_buffer_len != 0) { 178 /* Graceful receive stop delayed until end of frame */ 179 } else { 180 /* Graceful receive stop now */ 181 etsec->regs[IEVENT].value |= IEVENT_GRSC; 182 etsec_update_irq(etsec); 183 } 184 } 185 186 if (value & DMACTRL_GTS) { 187 188 if (etsec->tx_buffer_len != 0) { 189 /* Graceful transmit stop delayed until end of frame */ 190 } else { 191 /* Graceful transmit stop now */ 192 etsec->regs[IEVENT].value |= IEVENT_GTSC; 193 etsec_update_irq(etsec); 194 } 195 } 196 197 if (!(value & DMACTRL_WOP)) { 198 /* Start polling */ 199 ptimer_transaction_begin(etsec->ptimer); 200 ptimer_stop(etsec->ptimer); 201 ptimer_set_count(etsec->ptimer, 1); 202 ptimer_run(etsec->ptimer, 1); 203 ptimer_transaction_commit(etsec->ptimer); 204 } 205 } 206 207 static void etsec_write(void *opaque, 208 hwaddr addr, 209 uint64_t value, 210 unsigned size) 211 { 212 eTSEC *etsec = opaque; 213 uint32_t reg_index = addr / 4; 214 eTSEC_Register *reg = NULL; 215 uint32_t before = 0x0; 216 217 assert(reg_index < ETSEC_REG_NUMBER); 218 219 reg = &etsec->regs[reg_index]; 220 before = reg->value; 221 222 switch (reg_index) { 223 case IEVENT: 224 /* Write 1 to clear */ 225 reg->value &= ~value; 226 227 etsec_update_irq(etsec); 228 break; 229 230 case IMASK: 231 reg->value = value; 232 233 etsec_update_irq(etsec); 234 break; 235 236 case DMACTRL: 237 write_dmactrl(etsec, reg, reg_index, value); 238 break; 239 240 case TSTAT: 241 write_tstat(etsec, reg, reg_index, value); 242 break; 243 244 case RSTAT: 245 write_rstat(etsec, reg, reg_index, value); 246 break; 247 248 case TBASE0 ... TBASE7: 249 write_tbasex(etsec, reg, reg_index, value); 250 break; 251 252 case RBASE0 ... RBASE7: 253 write_rbasex(etsec, reg, reg_index, value); 254 break; 255 256 case MIIMCFG ... MIIMIND: 257 etsec_write_miim(etsec, reg, reg_index, value); 258 break; 259 260 default: 261 /* Default handling */ 262 switch (reg->access) { 263 264 case ACC_RW: 265 case ACC_WO: 266 reg->value = value; 267 break; 268 269 case ACC_W1C: 270 reg->value &= ~value; 271 break; 272 273 case ACC_RO: 274 default: 275 /* Read Only or Unknown register */ 276 break; 277 } 278 } 279 280 DPRINTF("Write 0x%08x @ 0x" HWADDR_FMT_plx 281 " val:0x%08x->0x%08x : %s (%s)\n", 282 (unsigned int)value, addr, before, reg->value, 283 reg->name, reg->desc); 284 } 285 286 static const MemoryRegionOps etsec_ops = { 287 .read = etsec_read, 288 .write = etsec_write, 289 .endianness = DEVICE_NATIVE_ENDIAN, 290 .impl = { 291 .min_access_size = 4, 292 .max_access_size = 4, 293 }, 294 }; 295 296 static void etsec_timer_hit(void *opaque) 297 { 298 eTSEC *etsec = opaque; 299 300 ptimer_stop(etsec->ptimer); 301 302 if (!(etsec->regs[DMACTRL].value & DMACTRL_WOP)) { 303 304 if (!(etsec->regs[DMACTRL].value & DMACTRL_GTS)) { 305 etsec_walk_tx_ring(etsec, 0); 306 } 307 ptimer_set_count(etsec->ptimer, 1); 308 ptimer_run(etsec->ptimer, 1); 309 } 310 } 311 312 static void etsec_reset(DeviceState *d) 313 { 314 eTSEC *etsec = ETSEC_COMMON(d); 315 int i = 0; 316 int reg_index = 0; 317 318 /* Default value for all registers */ 319 for (i = 0; i < ETSEC_REG_NUMBER; i++) { 320 etsec->regs[i].name = "Reserved"; 321 etsec->regs[i].desc = ""; 322 etsec->regs[i].access = ACC_UNKNOWN; 323 etsec->regs[i].value = 0x00000000; 324 } 325 326 /* Set-up known registers */ 327 for (i = 0; eTSEC_registers_def[i].name != NULL; i++) { 328 329 reg_index = eTSEC_registers_def[i].offset / 4; 330 331 etsec->regs[reg_index].name = eTSEC_registers_def[i].name; 332 etsec->regs[reg_index].desc = eTSEC_registers_def[i].desc; 333 etsec->regs[reg_index].access = eTSEC_registers_def[i].access; 334 etsec->regs[reg_index].value = eTSEC_registers_def[i].reset; 335 } 336 337 etsec->tx_buffer = NULL; 338 etsec->tx_buffer_len = 0; 339 etsec->rx_buffer = NULL; 340 etsec->rx_buffer_len = 0; 341 342 etsec->phy_status = 343 MII_BMSR_EXTCAP | MII_BMSR_LINK_ST | MII_BMSR_AUTONEG | 344 MII_BMSR_AN_COMP | MII_BMSR_MFPS | MII_BMSR_EXTSTAT | 345 MII_BMSR_100T2_HD | MII_BMSR_100T2_FD | 346 MII_BMSR_10T_HD | MII_BMSR_10T_FD | 347 MII_BMSR_100TX_HD | MII_BMSR_100TX_FD | MII_BMSR_100T4; 348 349 etsec_update_irq(etsec); 350 } 351 352 static ssize_t etsec_receive(NetClientState *nc, 353 const uint8_t *buf, 354 size_t size) 355 { 356 ssize_t ret; 357 eTSEC *etsec = qemu_get_nic_opaque(nc); 358 359 #if defined(HEX_DUMP) 360 fprintf(stderr, "%s receive size:%zd\n", nc->name, size); 361 qemu_hexdump(stderr, "", buf, size); 362 #endif 363 /* Flush is unnecessary as are already in receiving path */ 364 etsec->need_flush = false; 365 ret = etsec_rx_ring_write(etsec, buf, size); 366 if (ret == 0) { 367 /* The packet will be queued, let's flush it when buffer is available 368 * again. */ 369 etsec->need_flush = true; 370 } 371 return ret; 372 } 373 374 375 static void etsec_set_link_status(NetClientState *nc) 376 { 377 eTSEC *etsec = qemu_get_nic_opaque(nc); 378 379 etsec_miim_link_status(etsec, nc); 380 } 381 382 static NetClientInfo net_etsec_info = { 383 .type = NET_CLIENT_DRIVER_NIC, 384 .size = sizeof(NICState), 385 .receive = etsec_receive, 386 .link_status_changed = etsec_set_link_status, 387 }; 388 389 static void etsec_realize(DeviceState *dev, Error **errp) 390 { 391 eTSEC *etsec = ETSEC_COMMON(dev); 392 393 etsec->nic = qemu_new_nic(&net_etsec_info, &etsec->conf, 394 object_get_typename(OBJECT(dev)), dev->id, 395 &dev->mem_reentrancy_guard, etsec); 396 qemu_format_nic_info_str(qemu_get_queue(etsec->nic), etsec->conf.macaddr.a); 397 398 etsec->ptimer = ptimer_init(etsec_timer_hit, etsec, PTIMER_POLICY_LEGACY); 399 ptimer_transaction_begin(etsec->ptimer); 400 ptimer_set_freq(etsec->ptimer, 100); 401 ptimer_transaction_commit(etsec->ptimer); 402 } 403 404 static void etsec_instance_init(Object *obj) 405 { 406 eTSEC *etsec = ETSEC_COMMON(obj); 407 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 408 409 memory_region_init_io(&etsec->io_area, OBJECT(etsec), &etsec_ops, etsec, 410 "eTSEC", 0x1000); 411 sysbus_init_mmio(sbd, &etsec->io_area); 412 413 sysbus_init_irq(sbd, &etsec->tx_irq); 414 sysbus_init_irq(sbd, &etsec->rx_irq); 415 sysbus_init_irq(sbd, &etsec->err_irq); 416 } 417 418 static Property etsec_properties[] = { 419 DEFINE_NIC_PROPERTIES(eTSEC, conf), 420 DEFINE_PROP_END_OF_LIST(), 421 }; 422 423 static void etsec_class_init(ObjectClass *klass, void *data) 424 { 425 DeviceClass *dc = DEVICE_CLASS(klass); 426 427 dc->realize = etsec_realize; 428 dc->reset = etsec_reset; 429 device_class_set_props(dc, etsec_properties); 430 /* Supported by ppce500 machine */ 431 dc->user_creatable = true; 432 } 433 434 static const TypeInfo etsec_info = { 435 .name = TYPE_ETSEC_COMMON, 436 .parent = TYPE_SYS_BUS_DEVICE, 437 .instance_size = sizeof(eTSEC), 438 .class_init = etsec_class_init, 439 .instance_init = etsec_instance_init, 440 }; 441 442 static void etsec_register_types(void) 443 { 444 type_register_static(&etsec_info); 445 } 446 447 type_init(etsec_register_types) 448