1 /* 2 * ASPEED System Control Unit 3 * 4 * Andrew Jeffery <andrew@aj.id.au> 5 * 6 * Copyright 2016 IBM Corp. 7 * 8 * This code is licensed under the GPL version 2 or later. See 9 * the COPYING file in the top-level directory. 10 */ 11 12 #include "qemu/osdep.h" 13 #include "hw/misc/aspeed_scu.h" 14 #include "hw/qdev-properties.h" 15 #include "migration/vmstate.h" 16 #include "qapi/error.h" 17 #include "qapi/visitor.h" 18 #include "qemu/bitops.h" 19 #include "qemu/log.h" 20 #include "qemu/guest-random.h" 21 #include "qemu/module.h" 22 #include "trace.h" 23 24 #define TO_REG(offset) ((offset) >> 2) 25 26 #define PROT_KEY TO_REG(0x00) 27 #define SYS_RST_CTRL TO_REG(0x04) 28 #define CLK_SEL TO_REG(0x08) 29 #define CLK_STOP_CTRL TO_REG(0x0C) 30 #define FREQ_CNTR_CTRL TO_REG(0x10) 31 #define FREQ_CNTR_EVAL TO_REG(0x14) 32 #define IRQ_CTRL TO_REG(0x18) 33 #define D2PLL_PARAM TO_REG(0x1C) 34 #define MPLL_PARAM TO_REG(0x20) 35 #define HPLL_PARAM TO_REG(0x24) 36 #define FREQ_CNTR_RANGE TO_REG(0x28) 37 #define MISC_CTRL1 TO_REG(0x2C) 38 #define PCI_CTRL1 TO_REG(0x30) 39 #define PCI_CTRL2 TO_REG(0x34) 40 #define PCI_CTRL3 TO_REG(0x38) 41 #define SYS_RST_STATUS TO_REG(0x3C) 42 #define SOC_SCRATCH1 TO_REG(0x40) 43 #define SOC_SCRATCH2 TO_REG(0x44) 44 #define MAC_CLK_DELAY TO_REG(0x48) 45 #define MISC_CTRL2 TO_REG(0x4C) 46 #define VGA_SCRATCH1 TO_REG(0x50) 47 #define VGA_SCRATCH2 TO_REG(0x54) 48 #define VGA_SCRATCH3 TO_REG(0x58) 49 #define VGA_SCRATCH4 TO_REG(0x5C) 50 #define VGA_SCRATCH5 TO_REG(0x60) 51 #define VGA_SCRATCH6 TO_REG(0x64) 52 #define VGA_SCRATCH7 TO_REG(0x68) 53 #define VGA_SCRATCH8 TO_REG(0x6C) 54 #define HW_STRAP1 TO_REG(0x70) 55 #define RNG_CTRL TO_REG(0x74) 56 #define RNG_DATA TO_REG(0x78) 57 #define SILICON_REV TO_REG(0x7C) 58 #define PINMUX_CTRL1 TO_REG(0x80) 59 #define PINMUX_CTRL2 TO_REG(0x84) 60 #define PINMUX_CTRL3 TO_REG(0x88) 61 #define PINMUX_CTRL4 TO_REG(0x8C) 62 #define PINMUX_CTRL5 TO_REG(0x90) 63 #define PINMUX_CTRL6 TO_REG(0x94) 64 #define WDT_RST_CTRL TO_REG(0x9C) 65 #define PINMUX_CTRL7 TO_REG(0xA0) 66 #define PINMUX_CTRL8 TO_REG(0xA4) 67 #define PINMUX_CTRL9 TO_REG(0xA8) 68 #define WAKEUP_EN TO_REG(0xC0) 69 #define WAKEUP_CTRL TO_REG(0xC4) 70 #define HW_STRAP2 TO_REG(0xD0) 71 #define FREE_CNTR4 TO_REG(0xE0) 72 #define FREE_CNTR4_EXT TO_REG(0xE4) 73 #define CPU2_CTRL TO_REG(0x100) 74 #define CPU2_BASE_SEG1 TO_REG(0x104) 75 #define CPU2_BASE_SEG2 TO_REG(0x108) 76 #define CPU2_BASE_SEG3 TO_REG(0x10C) 77 #define CPU2_BASE_SEG4 TO_REG(0x110) 78 #define CPU2_BASE_SEG5 TO_REG(0x114) 79 #define CPU2_CACHE_CTRL TO_REG(0x118) 80 #define CHIP_ID0 TO_REG(0x150) 81 #define CHIP_ID1 TO_REG(0x154) 82 #define UART_HPLL_CLK TO_REG(0x160) 83 #define PCIE_CTRL TO_REG(0x180) 84 #define BMC_MMIO_CTRL TO_REG(0x184) 85 #define RELOC_DECODE_BASE1 TO_REG(0x188) 86 #define RELOC_DECODE_BASE2 TO_REG(0x18C) 87 #define MAILBOX_DECODE_BASE TO_REG(0x190) 88 #define SRAM_DECODE_BASE1 TO_REG(0x194) 89 #define SRAM_DECODE_BASE2 TO_REG(0x198) 90 #define BMC_REV TO_REG(0x19C) 91 #define BMC_DEV_ID TO_REG(0x1A4) 92 93 #define AST2600_PROT_KEY TO_REG(0x00) 94 #define AST2600_SILICON_REV TO_REG(0x04) 95 #define AST2600_SILICON_REV2 TO_REG(0x14) 96 #define AST2600_SYS_RST_CTRL TO_REG(0x40) 97 #define AST2600_SYS_RST_CTRL_CLR TO_REG(0x44) 98 #define AST2600_SYS_RST_CTRL2 TO_REG(0x50) 99 #define AST2600_SYS_RST_CTRL2_CLR TO_REG(0x54) 100 #define AST2600_CLK_STOP_CTRL TO_REG(0x80) 101 #define AST2600_CLK_STOP_CTRL_CLR TO_REG(0x84) 102 #define AST2600_CLK_STOP_CTRL2 TO_REG(0x90) 103 #define AST2600_CLK_STOP_CTRL2_CLR TO_REG(0x94) 104 #define AST2600_SDRAM_HANDSHAKE TO_REG(0x100) 105 #define AST2600_HPLL_PARAM TO_REG(0x200) 106 #define AST2600_HPLL_EXT TO_REG(0x204) 107 #define AST2600_MPLL_EXT TO_REG(0x224) 108 #define AST2600_EPLL_EXT TO_REG(0x244) 109 #define AST2600_CLK_SEL TO_REG(0x300) 110 #define AST2600_CLK_SEL2 TO_REG(0x304) 111 #define AST2600_CLK_SEL3 TO_REG(0x310) 112 #define AST2600_HW_STRAP1 TO_REG(0x500) 113 #define AST2600_HW_STRAP1_CLR TO_REG(0x504) 114 #define AST2600_HW_STRAP1_PROT TO_REG(0x508) 115 #define AST2600_HW_STRAP2 TO_REG(0x510) 116 #define AST2600_HW_STRAP2_CLR TO_REG(0x514) 117 #define AST2600_HW_STRAP2_PROT TO_REG(0x518) 118 #define AST2600_RNG_CTRL TO_REG(0x524) 119 #define AST2600_RNG_DATA TO_REG(0x540) 120 #define AST2600_CHIP_ID0 TO_REG(0x5B0) 121 #define AST2600_CHIP_ID1 TO_REG(0x5B4) 122 123 #define AST2600_CLK TO_REG(0x40) 124 125 #define SCU_IO_REGION_SIZE 0x1000 126 127 static const uint32_t ast2400_a0_resets[ASPEED_SCU_NR_REGS] = { 128 [SYS_RST_CTRL] = 0xFFCFFEDCU, 129 [CLK_SEL] = 0xF3F40000U, 130 [CLK_STOP_CTRL] = 0x19FC3E8BU, 131 [D2PLL_PARAM] = 0x00026108U, 132 [MPLL_PARAM] = 0x00030291U, 133 [HPLL_PARAM] = 0x00000291U, 134 [MISC_CTRL1] = 0x00000010U, 135 [PCI_CTRL1] = 0x20001A03U, 136 [PCI_CTRL2] = 0x20001A03U, 137 [PCI_CTRL3] = 0x04000030U, 138 [SYS_RST_STATUS] = 0x00000001U, 139 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ 140 [MISC_CTRL2] = 0x00000023U, 141 [RNG_CTRL] = 0x0000000EU, 142 [PINMUX_CTRL2] = 0x0000F000U, 143 [PINMUX_CTRL3] = 0x01000000U, 144 [PINMUX_CTRL4] = 0x000000FFU, 145 [PINMUX_CTRL5] = 0x0000A000U, 146 [WDT_RST_CTRL] = 0x003FFFF3U, 147 [PINMUX_CTRL8] = 0xFFFF0000U, 148 [PINMUX_CTRL9] = 0x000FFFFFU, 149 [FREE_CNTR4] = 0x000000FFU, 150 [FREE_CNTR4_EXT] = 0x000000FFU, 151 [CPU2_BASE_SEG1] = 0x80000000U, 152 [CPU2_BASE_SEG4] = 0x1E600000U, 153 [CPU2_BASE_SEG5] = 0xC0000000U, 154 [UART_HPLL_CLK] = 0x00001903U, 155 [PCIE_CTRL] = 0x0000007BU, 156 [BMC_DEV_ID] = 0x00002402U 157 }; 158 159 /* SCU70 bit 23: 0 24Mhz. bit 11:9: 0b001 AXI:ABH ratio 2:1 */ 160 /* AST2500 revision A1 */ 161 162 static const uint32_t ast2500_a1_resets[ASPEED_SCU_NR_REGS] = { 163 [SYS_RST_CTRL] = 0xFFCFFEDCU, 164 [CLK_SEL] = 0xF3F40000U, 165 [CLK_STOP_CTRL] = 0x19FC3E8BU, 166 [D2PLL_PARAM] = 0x00026108U, 167 [MPLL_PARAM] = 0x00030291U, 168 [HPLL_PARAM] = 0x93000400U, 169 [MISC_CTRL1] = 0x00000010U, 170 [PCI_CTRL1] = 0x20001A03U, 171 [PCI_CTRL2] = 0x20001A03U, 172 [PCI_CTRL3] = 0x04000030U, 173 [SYS_RST_STATUS] = 0x00000001U, 174 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ 175 [MISC_CTRL2] = 0x00000023U, 176 [RNG_CTRL] = 0x0000000EU, 177 [PINMUX_CTRL2] = 0x0000F000U, 178 [PINMUX_CTRL3] = 0x03000000U, 179 [PINMUX_CTRL4] = 0x00000000U, 180 [PINMUX_CTRL5] = 0x0000A000U, 181 [WDT_RST_CTRL] = 0x023FFFF3U, 182 [PINMUX_CTRL8] = 0xFFFF0000U, 183 [PINMUX_CTRL9] = 0x000FFFFFU, 184 [FREE_CNTR4] = 0x000000FFU, 185 [FREE_CNTR4_EXT] = 0x000000FFU, 186 [CPU2_BASE_SEG1] = 0x80000000U, 187 [CPU2_BASE_SEG4] = 0x1E600000U, 188 [CPU2_BASE_SEG5] = 0xC0000000U, 189 [CHIP_ID0] = 0x1234ABCDU, 190 [CHIP_ID1] = 0x88884444U, 191 [UART_HPLL_CLK] = 0x00001903U, 192 [PCIE_CTRL] = 0x0000007BU, 193 [BMC_DEV_ID] = 0x00002402U 194 }; 195 196 static uint32_t aspeed_scu_get_random(void) 197 { 198 uint32_t num; 199 qemu_guest_getrandom_nofail(&num, sizeof(num)); 200 return num; 201 } 202 203 uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s) 204 { 205 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); 206 uint32_t hpll = asc->calc_hpll(s, s->regs[HPLL_PARAM]); 207 208 return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[CLK_SEL]) + 1) 209 / asc->apb_divider; 210 } 211 212 static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size) 213 { 214 AspeedSCUState *s = ASPEED_SCU(opaque); 215 int reg = TO_REG(offset); 216 217 if (reg >= ASPEED_SCU_NR_REGS) { 218 qemu_log_mask(LOG_GUEST_ERROR, 219 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", 220 __func__, offset); 221 return 0; 222 } 223 224 switch (reg) { 225 case RNG_DATA: 226 /* On hardware, RNG_DATA works regardless of 227 * the state of the enable bit in RNG_CTRL 228 */ 229 s->regs[RNG_DATA] = aspeed_scu_get_random(); 230 break; 231 case WAKEUP_EN: 232 qemu_log_mask(LOG_GUEST_ERROR, 233 "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n", 234 __func__, offset); 235 break; 236 } 237 238 return s->regs[reg]; 239 } 240 241 static void aspeed_ast2400_scu_write(void *opaque, hwaddr offset, 242 uint64_t data, unsigned size) 243 { 244 AspeedSCUState *s = ASPEED_SCU(opaque); 245 int reg = TO_REG(offset); 246 247 if (reg >= ASPEED_SCU_NR_REGS) { 248 qemu_log_mask(LOG_GUEST_ERROR, 249 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 250 __func__, offset); 251 return; 252 } 253 254 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && 255 !s->regs[PROT_KEY]) { 256 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 257 } 258 259 trace_aspeed_scu_write(offset, size, data); 260 261 switch (reg) { 262 case PROT_KEY: 263 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 264 return; 265 case SILICON_REV: 266 case FREQ_CNTR_EVAL: 267 case VGA_SCRATCH1 ... VGA_SCRATCH8: 268 case RNG_DATA: 269 case FREE_CNTR4: 270 case FREE_CNTR4_EXT: 271 qemu_log_mask(LOG_GUEST_ERROR, 272 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 273 __func__, offset); 274 return; 275 } 276 277 s->regs[reg] = data; 278 } 279 280 static void aspeed_ast2500_scu_write(void *opaque, hwaddr offset, 281 uint64_t data, unsigned size) 282 { 283 AspeedSCUState *s = ASPEED_SCU(opaque); 284 int reg = TO_REG(offset); 285 286 if (reg >= ASPEED_SCU_NR_REGS) { 287 qemu_log_mask(LOG_GUEST_ERROR, 288 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 289 __func__, offset); 290 return; 291 } 292 293 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && 294 !s->regs[PROT_KEY]) { 295 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 296 return; 297 } 298 299 trace_aspeed_scu_write(offset, size, data); 300 301 switch (reg) { 302 case PROT_KEY: 303 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 304 return; 305 case HW_STRAP1: 306 s->regs[HW_STRAP1] |= data; 307 return; 308 case SILICON_REV: 309 s->regs[HW_STRAP1] &= ~data; 310 return; 311 case FREQ_CNTR_EVAL: 312 case VGA_SCRATCH1 ... VGA_SCRATCH8: 313 case RNG_DATA: 314 case FREE_CNTR4: 315 case FREE_CNTR4_EXT: 316 case CHIP_ID0: 317 case CHIP_ID1: 318 qemu_log_mask(LOG_GUEST_ERROR, 319 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 320 __func__, offset); 321 return; 322 } 323 324 s->regs[reg] = data; 325 } 326 327 static const MemoryRegionOps aspeed_ast2400_scu_ops = { 328 .read = aspeed_scu_read, 329 .write = aspeed_ast2400_scu_write, 330 .endianness = DEVICE_LITTLE_ENDIAN, 331 .valid.min_access_size = 4, 332 .valid.max_access_size = 4, 333 .valid.unaligned = false, 334 }; 335 336 static const MemoryRegionOps aspeed_ast2500_scu_ops = { 337 .read = aspeed_scu_read, 338 .write = aspeed_ast2500_scu_write, 339 .endianness = DEVICE_LITTLE_ENDIAN, 340 .valid.min_access_size = 4, 341 .valid.max_access_size = 4, 342 .valid.unaligned = false, 343 }; 344 345 static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s) 346 { 347 if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN) { 348 return 25000000; 349 } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) { 350 return 48000000; 351 } else { 352 return 24000000; 353 } 354 } 355 356 /* 357 * Strapped frequencies for the AST2400 in MHz. They depend on the 358 * clkin frequency. 359 */ 360 static const uint32_t hpll_ast2400_freqs[][4] = { 361 { 384, 360, 336, 408 }, /* 24MHz or 48MHz */ 362 { 400, 375, 350, 425 }, /* 25MHz */ 363 }; 364 365 static uint32_t aspeed_2400_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 366 { 367 uint8_t freq_select; 368 bool clk_25m_in; 369 uint32_t clkin = aspeed_scu_get_clkin(s); 370 371 if (hpll_reg & SCU_AST2400_H_PLL_OFF) { 372 return 0; 373 } 374 375 if (hpll_reg & SCU_AST2400_H_PLL_PROGRAMMED) { 376 uint32_t multiplier = 1; 377 378 if (!(hpll_reg & SCU_AST2400_H_PLL_BYPASS_EN)) { 379 uint32_t n = (hpll_reg >> 5) & 0x3f; 380 uint32_t od = (hpll_reg >> 4) & 0x1; 381 uint32_t d = hpll_reg & 0xf; 382 383 multiplier = (2 - od) * ((n + 2) / (d + 1)); 384 } 385 386 return clkin * multiplier; 387 } 388 389 /* HW strapping */ 390 clk_25m_in = !!(s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN); 391 freq_select = SCU_AST2400_HW_STRAP_GET_H_PLL_CLK(s->hw_strap1); 392 393 return hpll_ast2400_freqs[clk_25m_in][freq_select] * 1000000; 394 } 395 396 static uint32_t aspeed_2500_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 397 { 398 uint32_t multiplier = 1; 399 uint32_t clkin = aspeed_scu_get_clkin(s); 400 401 if (hpll_reg & SCU_H_PLL_OFF) { 402 return 0; 403 } 404 405 if (!(hpll_reg & SCU_H_PLL_BYPASS_EN)) { 406 uint32_t p = (hpll_reg >> 13) & 0x3f; 407 uint32_t m = (hpll_reg >> 5) & 0xff; 408 uint32_t n = hpll_reg & 0x1f; 409 410 multiplier = ((m + 1) / (n + 1)) / (p + 1); 411 } 412 413 return clkin * multiplier; 414 } 415 416 static void aspeed_scu_reset(DeviceState *dev) 417 { 418 AspeedSCUState *s = ASPEED_SCU(dev); 419 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 420 421 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 422 s->regs[SILICON_REV] = s->silicon_rev; 423 s->regs[HW_STRAP1] = s->hw_strap1; 424 s->regs[HW_STRAP2] = s->hw_strap2; 425 s->regs[PROT_KEY] = s->hw_prot_key; 426 } 427 428 static uint32_t aspeed_silicon_revs[] = { 429 AST2400_A0_SILICON_REV, 430 AST2400_A1_SILICON_REV, 431 AST2500_A0_SILICON_REV, 432 AST2500_A1_SILICON_REV, 433 AST2600_A0_SILICON_REV, 434 }; 435 436 bool is_supported_silicon_rev(uint32_t silicon_rev) 437 { 438 int i; 439 440 for (i = 0; i < ARRAY_SIZE(aspeed_silicon_revs); i++) { 441 if (silicon_rev == aspeed_silicon_revs[i]) { 442 return true; 443 } 444 } 445 446 return false; 447 } 448 449 static void aspeed_scu_realize(DeviceState *dev, Error **errp) 450 { 451 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 452 AspeedSCUState *s = ASPEED_SCU(dev); 453 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 454 455 if (!is_supported_silicon_rev(s->silicon_rev)) { 456 error_setg(errp, "Unknown silicon revision: 0x%" PRIx32, 457 s->silicon_rev); 458 return; 459 } 460 461 memory_region_init_io(&s->iomem, OBJECT(s), asc->ops, s, 462 TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE); 463 464 sysbus_init_mmio(sbd, &s->iomem); 465 } 466 467 static const VMStateDescription vmstate_aspeed_scu = { 468 .name = "aspeed.scu", 469 .version_id = 2, 470 .minimum_version_id = 2, 471 .fields = (VMStateField[]) { 472 VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_AST2600_SCU_NR_REGS), 473 VMSTATE_END_OF_LIST() 474 } 475 }; 476 477 static Property aspeed_scu_properties[] = { 478 DEFINE_PROP_UINT32("silicon-rev", AspeedSCUState, silicon_rev, 0), 479 DEFINE_PROP_UINT32("hw-strap1", AspeedSCUState, hw_strap1, 0), 480 DEFINE_PROP_UINT32("hw-strap2", AspeedSCUState, hw_strap2, 0), 481 DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0), 482 DEFINE_PROP_END_OF_LIST(), 483 }; 484 485 static void aspeed_scu_class_init(ObjectClass *klass, void *data) 486 { 487 DeviceClass *dc = DEVICE_CLASS(klass); 488 dc->realize = aspeed_scu_realize; 489 dc->reset = aspeed_scu_reset; 490 dc->desc = "ASPEED System Control Unit"; 491 dc->vmsd = &vmstate_aspeed_scu; 492 device_class_set_props(dc, aspeed_scu_properties); 493 } 494 495 static const TypeInfo aspeed_scu_info = { 496 .name = TYPE_ASPEED_SCU, 497 .parent = TYPE_SYS_BUS_DEVICE, 498 .instance_size = sizeof(AspeedSCUState), 499 .class_init = aspeed_scu_class_init, 500 .class_size = sizeof(AspeedSCUClass), 501 .abstract = true, 502 }; 503 504 static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data) 505 { 506 DeviceClass *dc = DEVICE_CLASS(klass); 507 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 508 509 dc->desc = "ASPEED 2400 System Control Unit"; 510 asc->resets = ast2400_a0_resets; 511 asc->calc_hpll = aspeed_2400_scu_calc_hpll; 512 asc->apb_divider = 2; 513 asc->nr_regs = ASPEED_SCU_NR_REGS; 514 asc->ops = &aspeed_ast2400_scu_ops; 515 } 516 517 static const TypeInfo aspeed_2400_scu_info = { 518 .name = TYPE_ASPEED_2400_SCU, 519 .parent = TYPE_ASPEED_SCU, 520 .instance_size = sizeof(AspeedSCUState), 521 .class_init = aspeed_2400_scu_class_init, 522 }; 523 524 static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data) 525 { 526 DeviceClass *dc = DEVICE_CLASS(klass); 527 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 528 529 dc->desc = "ASPEED 2500 System Control Unit"; 530 asc->resets = ast2500_a1_resets; 531 asc->calc_hpll = aspeed_2500_scu_calc_hpll; 532 asc->apb_divider = 4; 533 asc->nr_regs = ASPEED_SCU_NR_REGS; 534 asc->ops = &aspeed_ast2500_scu_ops; 535 } 536 537 static const TypeInfo aspeed_2500_scu_info = { 538 .name = TYPE_ASPEED_2500_SCU, 539 .parent = TYPE_ASPEED_SCU, 540 .instance_size = sizeof(AspeedSCUState), 541 .class_init = aspeed_2500_scu_class_init, 542 }; 543 544 static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset, 545 unsigned size) 546 { 547 AspeedSCUState *s = ASPEED_SCU(opaque); 548 int reg = TO_REG(offset); 549 550 if (reg >= ASPEED_AST2600_SCU_NR_REGS) { 551 qemu_log_mask(LOG_GUEST_ERROR, 552 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", 553 __func__, offset); 554 return 0; 555 } 556 557 switch (reg) { 558 case AST2600_HPLL_EXT: 559 case AST2600_EPLL_EXT: 560 case AST2600_MPLL_EXT: 561 /* PLLs are always "locked" */ 562 return s->regs[reg] | BIT(31); 563 case AST2600_RNG_DATA: 564 /* 565 * On hardware, RNG_DATA works regardless of the state of the 566 * enable bit in RNG_CTRL 567 * 568 * TODO: Check this is true for ast2600 569 */ 570 s->regs[AST2600_RNG_DATA] = aspeed_scu_get_random(); 571 break; 572 } 573 574 return s->regs[reg]; 575 } 576 577 static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, 578 uint64_t data64, unsigned size) 579 { 580 AspeedSCUState *s = ASPEED_SCU(opaque); 581 int reg = TO_REG(offset); 582 /* Truncate here so bitwise operations below behave as expected */ 583 uint32_t data = data64; 584 585 if (reg >= ASPEED_AST2600_SCU_NR_REGS) { 586 qemu_log_mask(LOG_GUEST_ERROR, 587 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 588 __func__, offset); 589 return; 590 } 591 592 if (reg > PROT_KEY && !s->regs[PROT_KEY]) { 593 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 594 } 595 596 trace_aspeed_scu_write(offset, size, data); 597 598 switch (reg) { 599 case AST2600_PROT_KEY: 600 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 601 return; 602 case AST2600_HW_STRAP1: 603 case AST2600_HW_STRAP2: 604 if (s->regs[reg + 2]) { 605 return; 606 } 607 /* fall through */ 608 case AST2600_SYS_RST_CTRL: 609 case AST2600_SYS_RST_CTRL2: 610 case AST2600_CLK_STOP_CTRL: 611 case AST2600_CLK_STOP_CTRL2: 612 /* W1S (Write 1 to set) registers */ 613 s->regs[reg] |= data; 614 return; 615 case AST2600_SYS_RST_CTRL_CLR: 616 case AST2600_SYS_RST_CTRL2_CLR: 617 case AST2600_CLK_STOP_CTRL_CLR: 618 case AST2600_CLK_STOP_CTRL2_CLR: 619 case AST2600_HW_STRAP1_CLR: 620 case AST2600_HW_STRAP2_CLR: 621 /* 622 * W1C (Write 1 to clear) registers are offset by one address from 623 * the data register 624 */ 625 s->regs[reg - 1] &= ~data; 626 return; 627 628 case AST2600_RNG_DATA: 629 case AST2600_SILICON_REV: 630 case AST2600_SILICON_REV2: 631 case AST2600_CHIP_ID0: 632 case AST2600_CHIP_ID1: 633 /* Add read only registers here */ 634 qemu_log_mask(LOG_GUEST_ERROR, 635 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 636 __func__, offset); 637 return; 638 } 639 640 s->regs[reg] = data; 641 } 642 643 static const MemoryRegionOps aspeed_ast2600_scu_ops = { 644 .read = aspeed_ast2600_scu_read, 645 .write = aspeed_ast2600_scu_write, 646 .endianness = DEVICE_LITTLE_ENDIAN, 647 .valid.min_access_size = 4, 648 .valid.max_access_size = 4, 649 .valid.unaligned = false, 650 }; 651 652 static const uint32_t ast2600_a0_resets[ASPEED_AST2600_SCU_NR_REGS] = { 653 [AST2600_SILICON_REV] = AST2600_SILICON_REV, 654 [AST2600_SILICON_REV2] = AST2600_SILICON_REV, 655 [AST2600_SYS_RST_CTRL] = 0xF7CFFEDC | 0x100, 656 [AST2600_SYS_RST_CTRL2] = 0xFFFFFFFC, 657 [AST2600_CLK_STOP_CTRL] = 0xEFF43E8B, 658 [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, 659 [AST2600_SDRAM_HANDSHAKE] = 0x00000040, /* SoC completed DRAM init */ 660 [AST2600_HPLL_PARAM] = 0x1000405F, 661 [AST2600_CHIP_ID0] = 0x1234ABCD, 662 [AST2600_CHIP_ID1] = 0x88884444, 663 664 }; 665 666 static void aspeed_ast2600_scu_reset(DeviceState *dev) 667 { 668 AspeedSCUState *s = ASPEED_SCU(dev); 669 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 670 671 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 672 673 s->regs[AST2600_SILICON_REV] = s->silicon_rev; 674 s->regs[AST2600_SILICON_REV2] = s->silicon_rev; 675 s->regs[AST2600_HW_STRAP1] = s->hw_strap1; 676 s->regs[AST2600_HW_STRAP2] = s->hw_strap2; 677 s->regs[PROT_KEY] = s->hw_prot_key; 678 } 679 680 static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data) 681 { 682 DeviceClass *dc = DEVICE_CLASS(klass); 683 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 684 685 dc->desc = "ASPEED 2600 System Control Unit"; 686 dc->reset = aspeed_ast2600_scu_reset; 687 asc->resets = ast2600_a0_resets; 688 asc->calc_hpll = aspeed_2500_scu_calc_hpll; /* No change since AST2500 */ 689 asc->apb_divider = 4; 690 asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; 691 asc->ops = &aspeed_ast2600_scu_ops; 692 } 693 694 static const TypeInfo aspeed_2600_scu_info = { 695 .name = TYPE_ASPEED_2600_SCU, 696 .parent = TYPE_ASPEED_SCU, 697 .instance_size = sizeof(AspeedSCUState), 698 .class_init = aspeed_2600_scu_class_init, 699 }; 700 701 static void aspeed_scu_register_types(void) 702 { 703 type_register_static(&aspeed_scu_info); 704 type_register_static(&aspeed_2400_scu_info); 705 type_register_static(&aspeed_2500_scu_info); 706 type_register_static(&aspeed_2600_scu_info); 707 } 708 709 type_init(aspeed_scu_register_types); 710