1 /* 2 * ARM Aspeed I2C controller 3 * 4 * Copyright (C) 2016 IBM Corp. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 * 19 */ 20 21 #include "qemu/osdep.h" 22 #include "hw/sysbus.h" 23 #include "migration/vmstate.h" 24 #include "qemu/cutils.h" 25 #include "qemu/log.h" 26 #include "qemu/module.h" 27 #include "qemu/error-report.h" 28 #include "qapi/error.h" 29 #include "hw/i2c/aspeed_i2c.h" 30 #include "hw/irq.h" 31 #include "hw/qdev-properties.h" 32 #include "hw/registerfields.h" 33 #include "trace.h" 34 35 /* Enable SLAVE_ADDR_RX_MATCH always */ 36 #define R_I2CD_INTR_STS_ALWAYS_ENABLE R_I2CD_INTR_STS_SLAVE_ADDR_RX_MATCH_MASK 37 38 static inline void aspeed_i2c_bus_raise_interrupt(AspeedI2CBus *bus) 39 { 40 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 41 uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus); 42 uint32_t intr_ctrl_reg = aspeed_i2c_bus_intr_ctrl_offset(bus); 43 uint32_t intr_ctrl_mask = bus->regs[intr_ctrl_reg] | 44 R_I2CD_INTR_STS_ALWAYS_ENABLE; 45 bool raise_irq; 46 47 if (trace_event_get_state_backends(TRACE_ASPEED_I2C_BUS_RAISE_INTERRUPT)) { 48 g_autofree char *buf = g_strdup_printf("%s%s%s%s%s%s%s", 49 aspeed_i2c_bus_pkt_mode_en(bus) && 50 ARRAY_FIELD_EX32(bus->regs, I2CM_INTR_STS, PKT_CMD_DONE) ? 51 "pktdone|" : "", 52 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, TX_NAK) ? 53 "nak|" : "", 54 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, TX_ACK) ? 55 "ack|" : "", 56 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, RX_DONE) ? 57 "done|" : "", 58 ARRAY_FIELD_EX32(bus->regs, I2CD_INTR_STS, SLAVE_ADDR_RX_MATCH) ? 59 "slave-match|" : "", 60 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, NORMAL_STOP) ? 61 "stop|" : "", 62 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, ABNORMAL) ? 63 "abnormal" : ""); 64 65 trace_aspeed_i2c_bus_raise_interrupt(bus->regs[reg_intr_sts], buf); 66 } 67 68 raise_irq = bus->regs[reg_intr_sts] & intr_ctrl_mask ; 69 70 /* In packet mode we don't mask off INTR_STS */ 71 if (!aspeed_i2c_bus_pkt_mode_en(bus)) { 72 bus->regs[reg_intr_sts] &= intr_ctrl_mask; 73 } 74 75 if (raise_irq) { 76 bus->controller->intr_status |= 1 << bus->id; 77 qemu_irq_raise(aic->bus_get_irq(bus)); 78 } 79 } 80 81 static inline void aspeed_i2c_bus_raise_slave_interrupt(AspeedI2CBus *bus) 82 { 83 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 84 85 if (!bus->regs[R_I2CS_INTR_STS]) { 86 return; 87 } 88 89 bus->controller->intr_status |= 1 << bus->id; 90 qemu_irq_raise(aic->bus_get_irq(bus)); 91 } 92 93 static uint64_t aspeed_i2c_bus_old_read(AspeedI2CBus *bus, hwaddr offset, 94 unsigned size) 95 { 96 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 97 uint64_t value = bus->regs[offset / sizeof(*bus->regs)]; 98 99 switch (offset) { 100 case A_I2CD_FUN_CTRL: 101 case A_I2CD_AC_TIMING1: 102 case A_I2CD_AC_TIMING2: 103 case A_I2CD_INTR_CTRL: 104 case A_I2CD_INTR_STS: 105 case A_I2CD_DEV_ADDR: 106 case A_I2CD_POOL_CTRL: 107 case A_I2CD_BYTE_BUF: 108 /* Value is already set, don't do anything. */ 109 break; 110 case A_I2CD_CMD: 111 value = SHARED_FIELD_DP32(value, BUS_BUSY_STS, i2c_bus_busy(bus->bus)); 112 break; 113 case A_I2CD_DMA_ADDR: 114 if (!aic->has_dma) { 115 qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__); 116 value = -1; 117 } 118 break; 119 case A_I2CD_DMA_LEN: 120 if (!aic->has_dma) { 121 qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__); 122 value = -1; 123 } 124 break; 125 126 default: 127 qemu_log_mask(LOG_GUEST_ERROR, 128 "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, offset); 129 value = -1; 130 break; 131 } 132 133 trace_aspeed_i2c_bus_read(bus->id, offset, size, value); 134 return value; 135 } 136 137 static uint64_t aspeed_i2c_bus_new_read(AspeedI2CBus *bus, hwaddr offset, 138 unsigned size) 139 { 140 uint64_t value = bus->regs[offset / sizeof(*bus->regs)]; 141 142 switch (offset) { 143 case A_I2CC_FUN_CTRL: 144 case A_I2CC_AC_TIMING: 145 case A_I2CC_POOL_CTRL: 146 case A_I2CM_INTR_CTRL: 147 case A_I2CM_INTR_STS: 148 case A_I2CC_MS_TXRX_BYTE_BUF: 149 case A_I2CM_DMA_LEN: 150 case A_I2CM_DMA_TX_ADDR: 151 case A_I2CM_DMA_RX_ADDR: 152 case A_I2CM_DMA_LEN_STS: 153 case A_I2CC_DMA_ADDR: 154 case A_I2CC_DMA_LEN: 155 156 case A_I2CS_DEV_ADDR: 157 case A_I2CS_DMA_RX_ADDR: 158 case A_I2CS_DMA_LEN: 159 case A_I2CS_CMD: 160 case A_I2CS_INTR_CTRL: 161 case A_I2CS_DMA_LEN_STS: 162 /* Value is already set, don't do anything. */ 163 break; 164 case A_I2CS_INTR_STS: 165 break; 166 case A_I2CM_CMD: 167 value = SHARED_FIELD_DP32(value, BUS_BUSY_STS, i2c_bus_busy(bus->bus)); 168 break; 169 default: 170 qemu_log_mask(LOG_GUEST_ERROR, 171 "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, offset); 172 value = -1; 173 break; 174 } 175 176 trace_aspeed_i2c_bus_read(bus->id, offset, size, value); 177 return value; 178 } 179 180 static uint64_t aspeed_i2c_bus_read(void *opaque, hwaddr offset, 181 unsigned size) 182 { 183 AspeedI2CBus *bus = opaque; 184 if (aspeed_i2c_is_new_mode(bus->controller)) { 185 return aspeed_i2c_bus_new_read(bus, offset, size); 186 } 187 return aspeed_i2c_bus_old_read(bus, offset, size); 188 } 189 190 static void aspeed_i2c_set_state(AspeedI2CBus *bus, uint8_t state) 191 { 192 if (aspeed_i2c_is_new_mode(bus->controller)) { 193 SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CC_MS_TXRX_BYTE_BUF, TX_STATE, 194 state); 195 } else { 196 SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CD_CMD, TX_STATE, state); 197 } 198 } 199 200 static uint8_t aspeed_i2c_get_state(AspeedI2CBus *bus) 201 { 202 if (aspeed_i2c_is_new_mode(bus->controller)) { 203 return SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CC_MS_TXRX_BYTE_BUF, 204 TX_STATE); 205 } 206 return SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_CMD, TX_STATE); 207 } 208 209 static int aspeed_i2c_dma_read(AspeedI2CBus *bus, uint8_t *data) 210 { 211 MemTxResult result; 212 AspeedI2CState *s = bus->controller; 213 uint32_t reg_dma_addr = aspeed_i2c_bus_dma_addr_offset(bus); 214 uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus); 215 216 result = address_space_read(&s->dram_as, bus->regs[reg_dma_addr], 217 MEMTXATTRS_UNSPECIFIED, data, 1); 218 if (result != MEMTX_OK) { 219 qemu_log_mask(LOG_GUEST_ERROR, "%s: DRAM read failed @%08x\n", 220 __func__, bus->regs[reg_dma_addr]); 221 return -1; 222 } 223 224 bus->regs[reg_dma_addr]++; 225 bus->regs[reg_dma_len]--; 226 return 0; 227 } 228 229 static int aspeed_i2c_bus_send(AspeedI2CBus *bus) 230 { 231 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 232 int ret = -1; 233 int i; 234 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 235 uint32_t reg_pool_ctrl = aspeed_i2c_bus_pool_ctrl_offset(bus); 236 uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus); 237 uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus); 238 int pool_tx_count = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl, 239 TX_COUNT) + 1; 240 241 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) { 242 for (i = 0; i < pool_tx_count; i++) { 243 uint8_t *pool_base = aic->bus_pool_base(bus); 244 245 trace_aspeed_i2c_bus_send("BUF", i + 1, pool_tx_count, 246 pool_base[i]); 247 ret = i2c_send(bus->bus, pool_base[i]); 248 if (ret) { 249 break; 250 } 251 } 252 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, TX_BUFF_EN, 0); 253 } else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN)) { 254 /* In new mode, clear how many bytes we TXed */ 255 if (aspeed_i2c_is_new_mode(bus->controller)) { 256 ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, TX_LEN, 0); 257 } 258 while (bus->regs[reg_dma_len]) { 259 uint8_t data; 260 aspeed_i2c_dma_read(bus, &data); 261 trace_aspeed_i2c_bus_send("DMA", bus->regs[reg_dma_len], 262 bus->regs[reg_dma_len], data); 263 ret = i2c_send(bus->bus, data); 264 if (ret) { 265 break; 266 } 267 /* In new mode, keep track of how many bytes we TXed */ 268 if (aspeed_i2c_is_new_mode(bus->controller)) { 269 ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, TX_LEN, 270 ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN_STS, 271 TX_LEN) + 1); 272 } 273 } 274 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, TX_DMA_EN, 0); 275 } else { 276 trace_aspeed_i2c_bus_send("BYTE", 0, 1, 277 bus->regs[reg_byte_buf]); 278 ret = i2c_send(bus->bus, bus->regs[reg_byte_buf]); 279 } 280 281 return ret; 282 } 283 284 static void aspeed_i2c_bus_recv(AspeedI2CBus *bus) 285 { 286 AspeedI2CState *s = bus->controller; 287 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s); 288 uint8_t data; 289 int i; 290 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 291 uint32_t reg_pool_ctrl = aspeed_i2c_bus_pool_ctrl_offset(bus); 292 uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus); 293 uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus); 294 uint32_t reg_dma_addr = aspeed_i2c_bus_dma_addr_offset(bus); 295 int pool_rx_count = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl, 296 RX_SIZE) + 1; 297 298 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) { 299 uint8_t *pool_base = aic->bus_pool_base(bus); 300 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl, 301 BUF_ORGANIZATION)) { 302 pool_base += 16; 303 } 304 305 for (i = 0; i < pool_rx_count; i++) { 306 pool_base[i] = i2c_recv(bus->bus); 307 trace_aspeed_i2c_bus_recv("BUF", i + 1, pool_rx_count, 308 pool_base[i]); 309 } 310 311 /* Update RX count */ 312 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_pool_ctrl, RX_COUNT, i & 0xff); 313 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, RX_BUFF_EN, 0); 314 } else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN)) { 315 /* In new mode, clear how many bytes we RXed */ 316 if (aspeed_i2c_is_new_mode(bus->controller)) { 317 ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, RX_LEN, 0); 318 } 319 320 while (bus->regs[reg_dma_len]) { 321 MemTxResult result; 322 323 data = i2c_recv(bus->bus); 324 trace_aspeed_i2c_bus_recv("DMA", bus->regs[reg_dma_len], 325 bus->regs[reg_dma_len], data); 326 result = address_space_write(&s->dram_as, bus->regs[reg_dma_addr], 327 MEMTXATTRS_UNSPECIFIED, &data, 1); 328 if (result != MEMTX_OK) { 329 qemu_log_mask(LOG_GUEST_ERROR, "%s: DRAM write failed @%08x\n", 330 __func__, bus->regs[reg_dma_addr]); 331 return; 332 } 333 bus->regs[reg_dma_addr]++; 334 bus->regs[reg_dma_len]--; 335 /* In new mode, keep track of how many bytes we RXed */ 336 if (aspeed_i2c_is_new_mode(bus->controller)) { 337 ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, RX_LEN, 338 ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN_STS, 339 RX_LEN) + 1); 340 } 341 } 342 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, RX_DMA_EN, 0); 343 } else { 344 data = i2c_recv(bus->bus); 345 trace_aspeed_i2c_bus_recv("BYTE", 1, 1, bus->regs[reg_byte_buf]); 346 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_byte_buf, RX_BUF, data); 347 } 348 } 349 350 static void aspeed_i2c_handle_rx_cmd(AspeedI2CBus *bus) 351 { 352 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 353 uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus); 354 355 aspeed_i2c_set_state(bus, I2CD_MRXD); 356 aspeed_i2c_bus_recv(bus); 357 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, RX_DONE, 1); 358 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_S_RX_CMD_LAST)) { 359 i2c_nack(bus->bus); 360 } 361 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_RX_CMD, 0); 362 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_S_RX_CMD_LAST, 0); 363 aspeed_i2c_set_state(bus, I2CD_MACTIVE); 364 } 365 366 static uint8_t aspeed_i2c_get_addr(AspeedI2CBus *bus) 367 { 368 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 369 uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus); 370 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 371 372 if (aspeed_i2c_bus_pkt_mode_en(bus)) { 373 return (ARRAY_FIELD_EX32(bus->regs, I2CM_CMD, PKT_DEV_ADDR) << 1) | 374 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_RX_CMD); 375 } 376 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) { 377 uint8_t *pool_base = aic->bus_pool_base(bus); 378 379 return pool_base[0]; 380 } else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN)) { 381 uint8_t data; 382 383 aspeed_i2c_dma_read(bus, &data); 384 return data; 385 } else { 386 return bus->regs[reg_byte_buf]; 387 } 388 } 389 390 static bool aspeed_i2c_check_sram(AspeedI2CBus *bus) 391 { 392 AspeedI2CState *s = bus->controller; 393 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s); 394 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 395 bool dma_en = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN) || 396 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN) || 397 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN) || 398 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN); 399 if (!aic->check_sram) { 400 return true; 401 } 402 403 /* 404 * AST2500: SRAM must be enabled before using the Buffer Pool or 405 * DMA mode. 406 */ 407 if (!FIELD_EX32(s->ctrl_global, I2C_CTRL_GLOBAL, SRAM_EN) && dma_en) { 408 qemu_log_mask(LOG_GUEST_ERROR, "%s: SRAM is not enabled\n", __func__); 409 return false; 410 } 411 412 return true; 413 } 414 415 static void aspeed_i2c_bus_cmd_dump(AspeedI2CBus *bus) 416 { 417 g_autofree char *cmd_flags = NULL; 418 uint32_t count; 419 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 420 uint32_t reg_pool_ctrl = aspeed_i2c_bus_pool_ctrl_offset(bus); 421 uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus); 422 uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus); 423 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) { 424 count = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl, TX_COUNT) + 1; 425 } else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN)) { 426 count = bus->regs[reg_dma_len]; 427 } else { /* BYTE mode */ 428 count = 1; 429 } 430 431 cmd_flags = g_strdup_printf("%s%s%s%s%s%s%s%s%s", 432 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_START_CMD) ? "start|" : "", 433 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN) ? "rxdma|" : "", 434 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN) ? "txdma|" : "", 435 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN) ? "rxbuf|" : "", 436 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN) ? "txbuf|" : "", 437 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_TX_CMD) ? "tx|" : "", 438 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_RX_CMD) ? "rx|" : "", 439 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_S_RX_CMD_LAST) ? "last|" : "", 440 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_STOP_CMD) ? "stop|" : ""); 441 442 trace_aspeed_i2c_bus_cmd(bus->regs[reg_cmd], cmd_flags, count, 443 bus->regs[reg_intr_sts]); 444 } 445 446 /* 447 * The state machine needs some refinement. It is only used to track 448 * invalid STOP commands for the moment. 449 */ 450 static void aspeed_i2c_bus_handle_cmd(AspeedI2CBus *bus, uint64_t value) 451 { 452 uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus); 453 uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus); 454 uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus); 455 456 if (!aspeed_i2c_check_sram(bus)) { 457 return; 458 } 459 460 if (trace_event_get_state_backends(TRACE_ASPEED_I2C_BUS_CMD)) { 461 aspeed_i2c_bus_cmd_dump(bus); 462 } 463 464 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_START_CMD)) { 465 uint8_t state = aspeed_i2c_get_state(bus) & I2CD_MACTIVE ? 466 I2CD_MSTARTR : I2CD_MSTART; 467 uint8_t addr; 468 469 aspeed_i2c_set_state(bus, state); 470 471 addr = aspeed_i2c_get_addr(bus); 472 if (i2c_start_transfer(bus->bus, extract32(addr, 1, 7), 473 extract32(addr, 0, 1))) { 474 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_NAK, 1); 475 if (aspeed_i2c_bus_pkt_mode_en(bus)) { 476 ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_FAIL, 1); 477 } 478 } else { 479 /* START doesn't set TX_ACK in packet mode */ 480 if (!aspeed_i2c_bus_pkt_mode_en(bus)) { 481 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_ACK, 1); 482 } 483 } 484 485 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_START_CMD, 0); 486 487 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN)) { 488 if (bus->regs[reg_dma_len] == 0) { 489 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0); 490 } 491 } else if (!SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) { 492 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0); 493 } 494 495 /* No slave found */ 496 if (!i2c_bus_busy(bus->bus)) { 497 if (aspeed_i2c_bus_pkt_mode_en(bus)) { 498 ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_FAIL, 1); 499 ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_DONE, 1); 500 } 501 return; 502 } 503 aspeed_i2c_set_state(bus, I2CD_MACTIVE); 504 } 505 506 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_TX_CMD)) { 507 aspeed_i2c_set_state(bus, I2CD_MTXD); 508 if (aspeed_i2c_bus_send(bus)) { 509 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_NAK, 1); 510 i2c_end_transfer(bus->bus); 511 } else { 512 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_ACK, 1); 513 } 514 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0); 515 aspeed_i2c_set_state(bus, I2CD_MACTIVE); 516 } 517 518 if ((SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_RX_CMD) || 519 SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_S_RX_CMD_LAST)) && 520 !SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, RX_DONE)) { 521 aspeed_i2c_handle_rx_cmd(bus); 522 } 523 524 if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_STOP_CMD)) { 525 if (!(aspeed_i2c_get_state(bus) & I2CD_MACTIVE)) { 526 qemu_log_mask(LOG_GUEST_ERROR, "%s: abnormal stop\n", __func__); 527 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, ABNORMAL, 1); 528 if (aspeed_i2c_bus_pkt_mode_en(bus)) { 529 ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_FAIL, 1); 530 } 531 } else { 532 aspeed_i2c_set_state(bus, I2CD_MSTOP); 533 i2c_end_transfer(bus->bus); 534 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, NORMAL_STOP, 1); 535 } 536 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_STOP_CMD, 0); 537 aspeed_i2c_set_state(bus, I2CD_IDLE); 538 539 i2c_schedule_pending_master(bus->bus); 540 } 541 542 if (aspeed_i2c_bus_pkt_mode_en(bus)) { 543 ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_DONE, 1); 544 } 545 } 546 547 static void aspeed_i2c_bus_new_write(AspeedI2CBus *bus, hwaddr offset, 548 uint64_t value, unsigned size) 549 { 550 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 551 bool handle_rx; 552 bool w1t; 553 554 trace_aspeed_i2c_bus_write(bus->id, offset, size, value); 555 556 switch (offset) { 557 case A_I2CC_FUN_CTRL: 558 bus->regs[R_I2CC_FUN_CTRL] = value; 559 break; 560 case A_I2CC_AC_TIMING: 561 bus->regs[R_I2CC_AC_TIMING] = value & 0x1ffff0ff; 562 break; 563 case A_I2CC_MS_TXRX_BYTE_BUF: 564 SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CC_MS_TXRX_BYTE_BUF, TX_BUF, 565 value); 566 break; 567 case A_I2CC_POOL_CTRL: 568 bus->regs[R_I2CC_POOL_CTRL] &= ~0xffffff; 569 bus->regs[R_I2CC_POOL_CTRL] |= (value & 0xffffff); 570 break; 571 case A_I2CM_INTR_CTRL: 572 bus->regs[R_I2CM_INTR_CTRL] = value & 0x0007f07f; 573 break; 574 case A_I2CM_INTR_STS: 575 handle_rx = SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CM_INTR_STS, RX_DONE) 576 && SHARED_FIELD_EX32(value, RX_DONE); 577 578 /* In packet mode, clearing PKT_CMD_DONE clears other interrupts. */ 579 if (aspeed_i2c_bus_pkt_mode_en(bus) && 580 FIELD_EX32(value, I2CM_INTR_STS, PKT_CMD_DONE)) { 581 bus->regs[R_I2CM_INTR_STS] &= 0xf0001000; 582 if (!bus->regs[R_I2CM_INTR_STS]) { 583 bus->controller->intr_status &= ~(1 << bus->id); 584 qemu_irq_lower(aic->bus_get_irq(bus)); 585 } 586 aspeed_i2c_bus_raise_slave_interrupt(bus); 587 break; 588 } 589 bus->regs[R_I2CM_INTR_STS] &= ~(value & 0xf007f07f); 590 if (!bus->regs[R_I2CM_INTR_STS]) { 591 bus->controller->intr_status &= ~(1 << bus->id); 592 qemu_irq_lower(aic->bus_get_irq(bus)); 593 } 594 if (handle_rx && (SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CM_CMD, 595 M_RX_CMD) || 596 SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CM_CMD, 597 M_S_RX_CMD_LAST))) { 598 aspeed_i2c_handle_rx_cmd(bus); 599 aspeed_i2c_bus_raise_interrupt(bus); 600 } 601 break; 602 case A_I2CM_CMD: 603 if (!aspeed_i2c_bus_is_enabled(bus)) { 604 break; 605 } 606 607 if (!aspeed_i2c_bus_is_master(bus)) { 608 qemu_log_mask(LOG_GUEST_ERROR, "%s: Master mode is not enabled\n", 609 __func__); 610 break; 611 } 612 613 if (!aic->has_dma && 614 (SHARED_FIELD_EX32(value, RX_DMA_EN) || 615 SHARED_FIELD_EX32(value, TX_DMA_EN))) { 616 qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__); 617 break; 618 } 619 620 if (bus->regs[R_I2CM_INTR_STS] & 0xffff0000) { 621 qemu_log_mask(LOG_UNIMP, "%s: Packet mode is not implemented\n", 622 __func__); 623 break; 624 } 625 626 value &= 0xff0ffbfb; 627 if (ARRAY_FIELD_EX32(bus->regs, I2CM_CMD, W1_CTRL)) { 628 bus->regs[R_I2CM_CMD] |= value; 629 } else { 630 bus->regs[R_I2CM_CMD] = value; 631 } 632 633 aspeed_i2c_bus_handle_cmd(bus, value); 634 aspeed_i2c_bus_raise_interrupt(bus); 635 break; 636 case A_I2CM_DMA_TX_ADDR: 637 bus->regs[R_I2CM_DMA_TX_ADDR] = FIELD_EX32(value, I2CM_DMA_TX_ADDR, 638 ADDR); 639 bus->regs[R_I2CC_DMA_ADDR] = FIELD_EX32(value, I2CM_DMA_TX_ADDR, ADDR); 640 bus->regs[R_I2CC_DMA_LEN] = ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN, 641 TX_BUF_LEN) + 1; 642 break; 643 case A_I2CM_DMA_RX_ADDR: 644 bus->regs[R_I2CM_DMA_RX_ADDR] = FIELD_EX32(value, I2CM_DMA_RX_ADDR, 645 ADDR); 646 bus->regs[R_I2CC_DMA_ADDR] = FIELD_EX32(value, I2CM_DMA_RX_ADDR, ADDR); 647 bus->regs[R_I2CC_DMA_LEN] = ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN, 648 RX_BUF_LEN) + 1; 649 break; 650 case A_I2CM_DMA_LEN: 651 w1t = FIELD_EX32(value, I2CM_DMA_LEN, RX_BUF_LEN_W1T) || 652 FIELD_EX32(value, I2CM_DMA_LEN, TX_BUF_LEN_W1T); 653 /* If none of the w1t bits are set, just write to the reg as normal. */ 654 if (!w1t) { 655 bus->regs[R_I2CM_DMA_LEN] = value; 656 break; 657 } 658 if (FIELD_EX32(value, I2CM_DMA_LEN, RX_BUF_LEN_W1T)) { 659 ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN, RX_BUF_LEN, 660 FIELD_EX32(value, I2CM_DMA_LEN, RX_BUF_LEN)); 661 } 662 if (FIELD_EX32(value, I2CM_DMA_LEN, TX_BUF_LEN_W1T)) { 663 ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN, TX_BUF_LEN, 664 FIELD_EX32(value, I2CM_DMA_LEN, TX_BUF_LEN)); 665 } 666 break; 667 case A_I2CM_DMA_LEN_STS: 668 /* Writes clear to 0 */ 669 bus->regs[R_I2CM_DMA_LEN_STS] = 0; 670 break; 671 case A_I2CC_DMA_ADDR: 672 case A_I2CC_DMA_LEN: 673 /* RO */ 674 break; 675 case A_I2CS_DEV_ADDR: 676 bus->regs[R_I2CS_DEV_ADDR] = value; 677 break; 678 case A_I2CS_DMA_RX_ADDR: 679 bus->regs[R_I2CS_DMA_RX_ADDR] = value; 680 break; 681 case A_I2CS_DMA_LEN: 682 assert(FIELD_EX32(value, I2CS_DMA_LEN, TX_BUF_LEN) == 0); 683 if (FIELD_EX32(value, I2CS_DMA_LEN, RX_BUF_LEN_W1T)) { 684 ARRAY_FIELD_DP32(bus->regs, I2CS_DMA_LEN, RX_BUF_LEN, 685 FIELD_EX32(value, I2CS_DMA_LEN, RX_BUF_LEN)); 686 } else { 687 bus->regs[R_I2CS_DMA_LEN] = value; 688 } 689 break; 690 case A_I2CS_CMD: 691 if (FIELD_EX32(value, I2CS_CMD, W1_CTRL)) { 692 bus->regs[R_I2CS_CMD] |= value; 693 } else { 694 bus->regs[R_I2CS_CMD] = value; 695 } 696 i2c_slave_set_address(bus->slave, bus->regs[R_I2CS_DEV_ADDR]); 697 break; 698 case A_I2CS_INTR_CTRL: 699 bus->regs[R_I2CS_INTR_CTRL] = value; 700 break; 701 702 case A_I2CS_INTR_STS: 703 if (ARRAY_FIELD_EX32(bus->regs, I2CS_INTR_CTRL, PKT_CMD_DONE)) { 704 if (ARRAY_FIELD_EX32(bus->regs, I2CS_INTR_STS, PKT_CMD_DONE) && 705 FIELD_EX32(value, I2CS_INTR_STS, PKT_CMD_DONE)) { 706 bus->regs[R_I2CS_INTR_STS] &= 0xfffc0000; 707 } 708 } else { 709 bus->regs[R_I2CS_INTR_STS] &= ~value; 710 } 711 if (!bus->regs[R_I2CS_INTR_STS]) { 712 bus->controller->intr_status &= ~(1 << bus->id); 713 qemu_irq_lower(aic->bus_get_irq(bus)); 714 } 715 aspeed_i2c_bus_raise_interrupt(bus); 716 break; 717 case A_I2CS_DMA_LEN_STS: 718 bus->regs[R_I2CS_DMA_LEN_STS] = 0; 719 break; 720 case A_I2CS_DMA_TX_ADDR: 721 qemu_log_mask(LOG_UNIMP, "%s: Slave mode DMA TX is not implemented\n", 722 __func__); 723 break; 724 default: 725 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n", 726 __func__, offset); 727 } 728 } 729 730 static void aspeed_i2c_bus_old_write(AspeedI2CBus *bus, hwaddr offset, 731 uint64_t value, unsigned size) 732 { 733 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller); 734 bool handle_rx; 735 736 trace_aspeed_i2c_bus_write(bus->id, offset, size, value); 737 738 switch (offset) { 739 case A_I2CD_FUN_CTRL: 740 if (SHARED_FIELD_EX32(value, SLAVE_EN)) { 741 i2c_slave_set_address(bus->slave, bus->regs[R_I2CD_DEV_ADDR]); 742 } 743 bus->regs[R_I2CD_FUN_CTRL] = value & 0x0071C3FF; 744 break; 745 case A_I2CD_AC_TIMING1: 746 bus->regs[R_I2CD_AC_TIMING1] = value & 0xFFFFF0F; 747 break; 748 case A_I2CD_AC_TIMING2: 749 bus->regs[R_I2CD_AC_TIMING2] = value & 0x7; 750 break; 751 case A_I2CD_INTR_CTRL: 752 bus->regs[R_I2CD_INTR_CTRL] = value & 0x7FFF; 753 break; 754 case A_I2CD_INTR_STS: 755 handle_rx = SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_INTR_STS, RX_DONE) 756 && SHARED_FIELD_EX32(value, RX_DONE); 757 bus->regs[R_I2CD_INTR_STS] &= ~(value & 0x7FFF); 758 if (!bus->regs[R_I2CD_INTR_STS]) { 759 bus->controller->intr_status &= ~(1 << bus->id); 760 qemu_irq_lower(aic->bus_get_irq(bus)); 761 } 762 if (handle_rx) { 763 if (SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_CMD, M_RX_CMD) || 764 SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_CMD, 765 M_S_RX_CMD_LAST)) { 766 aspeed_i2c_handle_rx_cmd(bus); 767 aspeed_i2c_bus_raise_interrupt(bus); 768 } else if (aspeed_i2c_get_state(bus) == I2CD_STXD) { 769 i2c_ack(bus->bus); 770 } 771 } 772 break; 773 case A_I2CD_DEV_ADDR: 774 bus->regs[R_I2CD_DEV_ADDR] = value; 775 break; 776 case A_I2CD_POOL_CTRL: 777 bus->regs[R_I2CD_POOL_CTRL] &= ~0xffffff; 778 bus->regs[R_I2CD_POOL_CTRL] |= (value & 0xffffff); 779 break; 780 781 case A_I2CD_BYTE_BUF: 782 SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CD_BYTE_BUF, TX_BUF, value); 783 break; 784 case A_I2CD_CMD: 785 if (!aspeed_i2c_bus_is_enabled(bus)) { 786 break; 787 } 788 789 if (!aspeed_i2c_bus_is_master(bus)) { 790 qemu_log_mask(LOG_GUEST_ERROR, "%s: Master mode is not enabled\n", 791 __func__); 792 break; 793 } 794 795 if (!aic->has_dma && 796 (SHARED_FIELD_EX32(value, RX_DMA_EN) || 797 SHARED_FIELD_EX32(value, TX_DMA_EN))) { 798 qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__); 799 break; 800 } 801 802 bus->regs[R_I2CD_CMD] &= ~0xFFFF; 803 bus->regs[R_I2CD_CMD] |= value & 0xFFFF; 804 805 aspeed_i2c_bus_handle_cmd(bus, value); 806 aspeed_i2c_bus_raise_interrupt(bus); 807 break; 808 case A_I2CD_DMA_ADDR: 809 if (!aic->has_dma) { 810 qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__); 811 break; 812 } 813 814 bus->regs[R_I2CD_DMA_ADDR] = value & 0x3ffffffc; 815 break; 816 817 case A_I2CD_DMA_LEN: 818 if (!aic->has_dma) { 819 qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__); 820 break; 821 } 822 823 bus->regs[R_I2CD_DMA_LEN] = value & 0xfff; 824 if (!bus->regs[R_I2CD_DMA_LEN]) { 825 qemu_log_mask(LOG_UNIMP, "%s: invalid DMA length\n", __func__); 826 } 827 break; 828 829 default: 830 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n", 831 __func__, offset); 832 } 833 } 834 835 static void aspeed_i2c_bus_write(void *opaque, hwaddr offset, 836 uint64_t value, unsigned size) 837 { 838 AspeedI2CBus *bus = opaque; 839 if (aspeed_i2c_is_new_mode(bus->controller)) { 840 aspeed_i2c_bus_new_write(bus, offset, value, size); 841 } else { 842 aspeed_i2c_bus_old_write(bus, offset, value, size); 843 } 844 } 845 846 static uint64_t aspeed_i2c_ctrl_read(void *opaque, hwaddr offset, 847 unsigned size) 848 { 849 AspeedI2CState *s = opaque; 850 851 switch (offset) { 852 case A_I2C_CTRL_STATUS: 853 return s->intr_status; 854 case A_I2C_CTRL_GLOBAL: 855 return s->ctrl_global; 856 case A_I2C_CTRL_NEW_CLK_DIVIDER: 857 if (aspeed_i2c_is_new_mode(s)) { 858 return s->new_clk_divider; 859 } 860 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n", 861 __func__, offset); 862 break; 863 default: 864 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n", 865 __func__, offset); 866 break; 867 } 868 869 return -1; 870 } 871 872 static void aspeed_i2c_ctrl_write(void *opaque, hwaddr offset, 873 uint64_t value, unsigned size) 874 { 875 AspeedI2CState *s = opaque; 876 877 switch (offset) { 878 case A_I2C_CTRL_GLOBAL: 879 s->ctrl_global = value; 880 break; 881 case A_I2C_CTRL_NEW_CLK_DIVIDER: 882 if (aspeed_i2c_is_new_mode(s)) { 883 s->new_clk_divider = value; 884 } else { 885 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx 886 "\n", __func__, offset); 887 } 888 break; 889 case A_I2C_CTRL_STATUS: 890 default: 891 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n", 892 __func__, offset); 893 break; 894 } 895 } 896 897 static const MemoryRegionOps aspeed_i2c_bus_ops = { 898 .read = aspeed_i2c_bus_read, 899 .write = aspeed_i2c_bus_write, 900 .endianness = DEVICE_LITTLE_ENDIAN, 901 }; 902 903 static const MemoryRegionOps aspeed_i2c_ctrl_ops = { 904 .read = aspeed_i2c_ctrl_read, 905 .write = aspeed_i2c_ctrl_write, 906 .endianness = DEVICE_LITTLE_ENDIAN, 907 }; 908 909 static uint64_t aspeed_i2c_pool_read(void *opaque, hwaddr offset, 910 unsigned size) 911 { 912 AspeedI2CState *s = opaque; 913 uint64_t ret = 0; 914 int i; 915 916 for (i = 0; i < size; i++) { 917 ret |= (uint64_t) s->pool[offset + i] << (8 * i); 918 } 919 920 return ret; 921 } 922 923 static void aspeed_i2c_pool_write(void *opaque, hwaddr offset, 924 uint64_t value, unsigned size) 925 { 926 AspeedI2CState *s = opaque; 927 int i; 928 929 for (i = 0; i < size; i++) { 930 s->pool[offset + i] = (value >> (8 * i)) & 0xFF; 931 } 932 } 933 934 static const MemoryRegionOps aspeed_i2c_pool_ops = { 935 .read = aspeed_i2c_pool_read, 936 .write = aspeed_i2c_pool_write, 937 .endianness = DEVICE_LITTLE_ENDIAN, 938 .valid = { 939 .min_access_size = 1, 940 .max_access_size = 4, 941 }, 942 }; 943 944 static const VMStateDescription aspeed_i2c_bus_vmstate = { 945 .name = TYPE_ASPEED_I2C, 946 .version_id = 5, 947 .minimum_version_id = 5, 948 .fields = (const VMStateField[]) { 949 VMSTATE_UINT32_ARRAY(regs, AspeedI2CBus, ASPEED_I2C_NEW_NUM_REG), 950 VMSTATE_END_OF_LIST() 951 } 952 }; 953 954 static const VMStateDescription aspeed_i2c_vmstate = { 955 .name = TYPE_ASPEED_I2C, 956 .version_id = 2, 957 .minimum_version_id = 2, 958 .fields = (const VMStateField[]) { 959 VMSTATE_UINT32(intr_status, AspeedI2CState), 960 VMSTATE_STRUCT_ARRAY(busses, AspeedI2CState, 961 ASPEED_I2C_NR_BUSSES, 1, aspeed_i2c_bus_vmstate, 962 AspeedI2CBus), 963 VMSTATE_UINT8_ARRAY(pool, AspeedI2CState, ASPEED_I2C_MAX_POOL_SIZE), 964 VMSTATE_END_OF_LIST() 965 } 966 }; 967 968 static void aspeed_i2c_reset(DeviceState *dev) 969 { 970 AspeedI2CState *s = ASPEED_I2C(dev); 971 972 s->intr_status = 0; 973 } 974 975 static void aspeed_i2c_instance_init(Object *obj) 976 { 977 AspeedI2CState *s = ASPEED_I2C(obj); 978 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s); 979 int i; 980 981 for (i = 0; i < aic->num_busses; i++) { 982 object_initialize_child(obj, "bus[*]", &s->busses[i], 983 TYPE_ASPEED_I2C_BUS); 984 } 985 } 986 987 /* 988 * Address Definitions (AST2400 and AST2500) 989 * 990 * 0x000 ... 0x03F: Global Register 991 * 0x040 ... 0x07F: Device 1 992 * 0x080 ... 0x0BF: Device 2 993 * 0x0C0 ... 0x0FF: Device 3 994 * 0x100 ... 0x13F: Device 4 995 * 0x140 ... 0x17F: Device 5 996 * 0x180 ... 0x1BF: Device 6 997 * 0x1C0 ... 0x1FF: Device 7 998 * 0x200 ... 0x2FF: Buffer Pool (unused in linux driver) 999 * 0x300 ... 0x33F: Device 8 1000 * 0x340 ... 0x37F: Device 9 1001 * 0x380 ... 0x3BF: Device 10 1002 * 0x3C0 ... 0x3FF: Device 11 1003 * 0x400 ... 0x43F: Device 12 1004 * 0x440 ... 0x47F: Device 13 1005 * 0x480 ... 0x4BF: Device 14 1006 * 0x800 ... 0xFFF: Buffer Pool (unused in linux driver) 1007 */ 1008 static void aspeed_i2c_realize(DeviceState *dev, Error **errp) 1009 { 1010 int i; 1011 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 1012 AspeedI2CState *s = ASPEED_I2C(dev); 1013 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s); 1014 1015 sysbus_init_irq(sbd, &s->irq); 1016 memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_i2c_ctrl_ops, s, 1017 "aspeed.i2c", 0x1000); 1018 sysbus_init_mmio(sbd, &s->iomem); 1019 1020 for (i = 0; i < aic->num_busses; i++) { 1021 Object *bus = OBJECT(&s->busses[i]); 1022 int offset = i < aic->gap ? 1 : 5; 1023 1024 if (!object_property_set_link(bus, "controller", OBJECT(s), errp)) { 1025 return; 1026 } 1027 1028 if (!object_property_set_uint(bus, "bus-id", i, errp)) { 1029 return; 1030 } 1031 1032 if (!sysbus_realize(SYS_BUS_DEVICE(bus), errp)) { 1033 return; 1034 } 1035 1036 memory_region_add_subregion(&s->iomem, aic->reg_size * (i + offset), 1037 &s->busses[i].mr); 1038 } 1039 1040 memory_region_init_io(&s->pool_iomem, OBJECT(s), &aspeed_i2c_pool_ops, s, 1041 "aspeed.i2c-pool", aic->pool_size); 1042 memory_region_add_subregion(&s->iomem, aic->pool_base, &s->pool_iomem); 1043 1044 if (aic->has_dma) { 1045 if (!s->dram_mr) { 1046 error_setg(errp, TYPE_ASPEED_I2C ": 'dram' link not set"); 1047 return; 1048 } 1049 1050 address_space_init(&s->dram_as, s->dram_mr, 1051 TYPE_ASPEED_I2C "-dma-dram"); 1052 } 1053 } 1054 1055 static Property aspeed_i2c_properties[] = { 1056 DEFINE_PROP_LINK("dram", AspeedI2CState, dram_mr, 1057 TYPE_MEMORY_REGION, MemoryRegion *), 1058 DEFINE_PROP_END_OF_LIST(), 1059 }; 1060 1061 static void aspeed_i2c_class_init(ObjectClass *klass, void *data) 1062 { 1063 DeviceClass *dc = DEVICE_CLASS(klass); 1064 1065 dc->vmsd = &aspeed_i2c_vmstate; 1066 dc->reset = aspeed_i2c_reset; 1067 device_class_set_props(dc, aspeed_i2c_properties); 1068 dc->realize = aspeed_i2c_realize; 1069 dc->desc = "Aspeed I2C Controller"; 1070 } 1071 1072 static const TypeInfo aspeed_i2c_info = { 1073 .name = TYPE_ASPEED_I2C, 1074 .parent = TYPE_SYS_BUS_DEVICE, 1075 .instance_init = aspeed_i2c_instance_init, 1076 .instance_size = sizeof(AspeedI2CState), 1077 .class_init = aspeed_i2c_class_init, 1078 .class_size = sizeof(AspeedI2CClass), 1079 .abstract = true, 1080 }; 1081 1082 static int aspeed_i2c_bus_new_slave_event(AspeedI2CBus *bus, 1083 enum i2c_event event) 1084 { 1085 switch (event) { 1086 case I2C_START_SEND_ASYNC: 1087 if (!SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CS_CMD, RX_DMA_EN)) { 1088 qemu_log_mask(LOG_GUEST_ERROR, 1089 "%s: Slave mode RX DMA is not enabled\n", __func__); 1090 return -1; 1091 } 1092 ARRAY_FIELD_DP32(bus->regs, I2CS_DMA_LEN_STS, RX_LEN, 0); 1093 bus->regs[R_I2CC_DMA_ADDR] = 1094 ARRAY_FIELD_EX32(bus->regs, I2CS_DMA_RX_ADDR, ADDR); 1095 bus->regs[R_I2CC_DMA_LEN] = 1096 ARRAY_FIELD_EX32(bus->regs, I2CS_DMA_LEN, RX_BUF_LEN) + 1; 1097 i2c_ack(bus->bus); 1098 break; 1099 case I2C_FINISH: 1100 ARRAY_FIELD_DP32(bus->regs, I2CS_INTR_STS, PKT_CMD_DONE, 1); 1101 ARRAY_FIELD_DP32(bus->regs, I2CS_INTR_STS, SLAVE_ADDR_RX_MATCH, 1); 1102 SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CS_INTR_STS, NORMAL_STOP, 1); 1103 SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CS_INTR_STS, RX_DONE, 1); 1104 aspeed_i2c_bus_raise_slave_interrupt(bus); 1105 break; 1106 default: 1107 qemu_log_mask(LOG_UNIMP, "%s: i2c event %d unimplemented\n", 1108 __func__, event); 1109 return -1; 1110 } 1111 1112 return 0; 1113 } 1114 1115 static int aspeed_i2c_bus_slave_event(I2CSlave *slave, enum i2c_event event) 1116 { 1117 BusState *qbus = qdev_get_parent_bus(DEVICE(slave)); 1118 AspeedI2CBus *bus = ASPEED_I2C_BUS(qbus->parent); 1119 uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus); 1120 uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus); 1121 uint32_t reg_dev_addr = aspeed_i2c_bus_dev_addr_offset(bus); 1122 uint32_t dev_addr = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_dev_addr, 1123 SLAVE_DEV_ADDR1); 1124 1125 if (aspeed_i2c_is_new_mode(bus->controller)) { 1126 return aspeed_i2c_bus_new_slave_event(bus, event); 1127 } 1128 1129 switch (event) { 1130 case I2C_START_SEND_ASYNC: 1131 /* Bit[0] == 0 indicates "send". */ 1132 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_byte_buf, RX_BUF, dev_addr << 1); 1133 1134 ARRAY_FIELD_DP32(bus->regs, I2CD_INTR_STS, SLAVE_ADDR_RX_MATCH, 1); 1135 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, RX_DONE, 1); 1136 1137 aspeed_i2c_set_state(bus, I2CD_STXD); 1138 1139 break; 1140 1141 case I2C_FINISH: 1142 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, NORMAL_STOP, 1); 1143 1144 aspeed_i2c_set_state(bus, I2CD_IDLE); 1145 1146 break; 1147 1148 default: 1149 return -1; 1150 } 1151 1152 aspeed_i2c_bus_raise_interrupt(bus); 1153 1154 return 0; 1155 } 1156 1157 static void aspeed_i2c_bus_new_slave_send_async(AspeedI2CBus *bus, uint8_t data) 1158 { 1159 assert(address_space_write(&bus->controller->dram_as, 1160 bus->regs[R_I2CC_DMA_ADDR], 1161 MEMTXATTRS_UNSPECIFIED, &data, 1) == MEMTX_OK); 1162 1163 bus->regs[R_I2CC_DMA_ADDR]++; 1164 bus->regs[R_I2CC_DMA_LEN]--; 1165 ARRAY_FIELD_DP32(bus->regs, I2CS_DMA_LEN_STS, RX_LEN, 1166 ARRAY_FIELD_EX32(bus->regs, I2CS_DMA_LEN_STS, RX_LEN) + 1); 1167 i2c_ack(bus->bus); 1168 } 1169 1170 static void aspeed_i2c_bus_slave_send_async(I2CSlave *slave, uint8_t data) 1171 { 1172 BusState *qbus = qdev_get_parent_bus(DEVICE(slave)); 1173 AspeedI2CBus *bus = ASPEED_I2C_BUS(qbus->parent); 1174 uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus); 1175 uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus); 1176 1177 if (aspeed_i2c_is_new_mode(bus->controller)) { 1178 return aspeed_i2c_bus_new_slave_send_async(bus, data); 1179 } 1180 1181 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_byte_buf, RX_BUF, data); 1182 SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, RX_DONE, 1); 1183 1184 aspeed_i2c_bus_raise_interrupt(bus); 1185 } 1186 1187 static void aspeed_i2c_bus_slave_class_init(ObjectClass *klass, void *data) 1188 { 1189 DeviceClass *dc = DEVICE_CLASS(klass); 1190 I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass); 1191 1192 dc->desc = "Aspeed I2C Bus Slave"; 1193 1194 sc->event = aspeed_i2c_bus_slave_event; 1195 sc->send_async = aspeed_i2c_bus_slave_send_async; 1196 } 1197 1198 static const TypeInfo aspeed_i2c_bus_slave_info = { 1199 .name = TYPE_ASPEED_I2C_BUS_SLAVE, 1200 .parent = TYPE_I2C_SLAVE, 1201 .instance_size = sizeof(AspeedI2CBusSlave), 1202 .class_init = aspeed_i2c_bus_slave_class_init, 1203 }; 1204 1205 static void aspeed_i2c_bus_reset(DeviceState *dev) 1206 { 1207 AspeedI2CBus *s = ASPEED_I2C_BUS(dev); 1208 1209 memset(s->regs, 0, sizeof(s->regs)); 1210 i2c_end_transfer(s->bus); 1211 } 1212 1213 static void aspeed_i2c_bus_realize(DeviceState *dev, Error **errp) 1214 { 1215 AspeedI2CBus *s = ASPEED_I2C_BUS(dev); 1216 AspeedI2CClass *aic; 1217 g_autofree char *name = g_strdup_printf(TYPE_ASPEED_I2C_BUS ".%d", s->id); 1218 1219 if (!s->controller) { 1220 error_setg(errp, TYPE_ASPEED_I2C_BUS ": 'controller' link not set"); 1221 return; 1222 } 1223 1224 aic = ASPEED_I2C_GET_CLASS(s->controller); 1225 1226 sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq); 1227 1228 s->bus = i2c_init_bus(dev, name); 1229 s->slave = i2c_slave_create_simple(s->bus, TYPE_ASPEED_I2C_BUS_SLAVE, 1230 0xff); 1231 1232 memory_region_init_io(&s->mr, OBJECT(s), &aspeed_i2c_bus_ops, 1233 s, name, aic->reg_size); 1234 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mr); 1235 } 1236 1237 static Property aspeed_i2c_bus_properties[] = { 1238 DEFINE_PROP_UINT8("bus-id", AspeedI2CBus, id, 0), 1239 DEFINE_PROP_LINK("controller", AspeedI2CBus, controller, TYPE_ASPEED_I2C, 1240 AspeedI2CState *), 1241 DEFINE_PROP_END_OF_LIST(), 1242 }; 1243 1244 static void aspeed_i2c_bus_class_init(ObjectClass *klass, void *data) 1245 { 1246 DeviceClass *dc = DEVICE_CLASS(klass); 1247 1248 dc->desc = "Aspeed I2C Bus"; 1249 dc->realize = aspeed_i2c_bus_realize; 1250 dc->reset = aspeed_i2c_bus_reset; 1251 device_class_set_props(dc, aspeed_i2c_bus_properties); 1252 } 1253 1254 static const TypeInfo aspeed_i2c_bus_info = { 1255 .name = TYPE_ASPEED_I2C_BUS, 1256 .parent = TYPE_SYS_BUS_DEVICE, 1257 .instance_size = sizeof(AspeedI2CBus), 1258 .class_init = aspeed_i2c_bus_class_init, 1259 }; 1260 1261 static qemu_irq aspeed_2400_i2c_bus_get_irq(AspeedI2CBus *bus) 1262 { 1263 return bus->controller->irq; 1264 } 1265 1266 static uint8_t *aspeed_2400_i2c_bus_pool_base(AspeedI2CBus *bus) 1267 { 1268 uint8_t *pool_page = 1269 &bus->controller->pool[ARRAY_FIELD_EX32(bus->regs, I2CD_FUN_CTRL, 1270 POOL_PAGE_SEL) * 0x100]; 1271 1272 return &pool_page[ARRAY_FIELD_EX32(bus->regs, I2CD_POOL_CTRL, OFFSET)]; 1273 } 1274 1275 static void aspeed_2400_i2c_class_init(ObjectClass *klass, void *data) 1276 { 1277 DeviceClass *dc = DEVICE_CLASS(klass); 1278 AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass); 1279 1280 dc->desc = "ASPEED 2400 I2C Controller"; 1281 1282 aic->num_busses = 14; 1283 aic->reg_size = 0x40; 1284 aic->gap = 7; 1285 aic->bus_get_irq = aspeed_2400_i2c_bus_get_irq; 1286 aic->pool_size = 0x800; 1287 aic->pool_base = 0x800; 1288 aic->bus_pool_base = aspeed_2400_i2c_bus_pool_base; 1289 } 1290 1291 static const TypeInfo aspeed_2400_i2c_info = { 1292 .name = TYPE_ASPEED_2400_I2C, 1293 .parent = TYPE_ASPEED_I2C, 1294 .class_init = aspeed_2400_i2c_class_init, 1295 }; 1296 1297 static qemu_irq aspeed_2500_i2c_bus_get_irq(AspeedI2CBus *bus) 1298 { 1299 return bus->controller->irq; 1300 } 1301 1302 static uint8_t *aspeed_2500_i2c_bus_pool_base(AspeedI2CBus *bus) 1303 { 1304 return &bus->controller->pool[bus->id * 0x10]; 1305 } 1306 1307 static void aspeed_2500_i2c_class_init(ObjectClass *klass, void *data) 1308 { 1309 DeviceClass *dc = DEVICE_CLASS(klass); 1310 AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass); 1311 1312 dc->desc = "ASPEED 2500 I2C Controller"; 1313 1314 aic->num_busses = 14; 1315 aic->reg_size = 0x40; 1316 aic->gap = 7; 1317 aic->bus_get_irq = aspeed_2500_i2c_bus_get_irq; 1318 aic->pool_size = 0x100; 1319 aic->pool_base = 0x200; 1320 aic->bus_pool_base = aspeed_2500_i2c_bus_pool_base; 1321 aic->check_sram = true; 1322 aic->has_dma = true; 1323 } 1324 1325 static const TypeInfo aspeed_2500_i2c_info = { 1326 .name = TYPE_ASPEED_2500_I2C, 1327 .parent = TYPE_ASPEED_I2C, 1328 .class_init = aspeed_2500_i2c_class_init, 1329 }; 1330 1331 static qemu_irq aspeed_2600_i2c_bus_get_irq(AspeedI2CBus *bus) 1332 { 1333 return bus->irq; 1334 } 1335 1336 static uint8_t *aspeed_2600_i2c_bus_pool_base(AspeedI2CBus *bus) 1337 { 1338 return &bus->controller->pool[bus->id * 0x20]; 1339 } 1340 1341 static void aspeed_2600_i2c_class_init(ObjectClass *klass, void *data) 1342 { 1343 DeviceClass *dc = DEVICE_CLASS(klass); 1344 AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass); 1345 1346 dc->desc = "ASPEED 2600 I2C Controller"; 1347 1348 aic->num_busses = 16; 1349 aic->reg_size = 0x80; 1350 aic->gap = -1; /* no gap */ 1351 aic->bus_get_irq = aspeed_2600_i2c_bus_get_irq; 1352 aic->pool_size = 0x200; 1353 aic->pool_base = 0xC00; 1354 aic->bus_pool_base = aspeed_2600_i2c_bus_pool_base; 1355 aic->has_dma = true; 1356 } 1357 1358 static const TypeInfo aspeed_2600_i2c_info = { 1359 .name = TYPE_ASPEED_2600_I2C, 1360 .parent = TYPE_ASPEED_I2C, 1361 .class_init = aspeed_2600_i2c_class_init, 1362 }; 1363 1364 static void aspeed_1030_i2c_class_init(ObjectClass *klass, void *data) 1365 { 1366 DeviceClass *dc = DEVICE_CLASS(klass); 1367 AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass); 1368 1369 dc->desc = "ASPEED 1030 I2C Controller"; 1370 1371 aic->num_busses = 14; 1372 aic->reg_size = 0x80; 1373 aic->gap = -1; /* no gap */ 1374 aic->bus_get_irq = aspeed_2600_i2c_bus_get_irq; 1375 aic->pool_size = 0x200; 1376 aic->pool_base = 0xC00; 1377 aic->bus_pool_base = aspeed_2600_i2c_bus_pool_base; 1378 aic->has_dma = true; 1379 } 1380 1381 static const TypeInfo aspeed_1030_i2c_info = { 1382 .name = TYPE_ASPEED_1030_I2C, 1383 .parent = TYPE_ASPEED_I2C, 1384 .class_init = aspeed_1030_i2c_class_init, 1385 }; 1386 1387 static void aspeed_i2c_register_types(void) 1388 { 1389 type_register_static(&aspeed_i2c_bus_info); 1390 type_register_static(&aspeed_i2c_bus_slave_info); 1391 type_register_static(&aspeed_i2c_info); 1392 type_register_static(&aspeed_2400_i2c_info); 1393 type_register_static(&aspeed_2500_i2c_info); 1394 type_register_static(&aspeed_2600_i2c_info); 1395 type_register_static(&aspeed_1030_i2c_info); 1396 } 1397 1398 type_init(aspeed_i2c_register_types) 1399 1400 1401 I2CBus *aspeed_i2c_get_bus(AspeedI2CState *s, int busnr) 1402 { 1403 AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s); 1404 I2CBus *bus = NULL; 1405 1406 if (busnr >= 0 && busnr < aic->num_busses) { 1407 bus = s->busses[busnr].bus; 1408 } 1409 1410 return bus; 1411 } 1412