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 UART_HPLL_CLK TO_REG(0x160) 81 #define PCIE_CTRL TO_REG(0x180) 82 #define BMC_MMIO_CTRL TO_REG(0x184) 83 #define RELOC_DECODE_BASE1 TO_REG(0x188) 84 #define RELOC_DECODE_BASE2 TO_REG(0x18C) 85 #define MAILBOX_DECODE_BASE TO_REG(0x190) 86 #define SRAM_DECODE_BASE1 TO_REG(0x194) 87 #define SRAM_DECODE_BASE2 TO_REG(0x198) 88 #define BMC_REV TO_REG(0x19C) 89 #define BMC_DEV_ID TO_REG(0x1A4) 90 91 #define AST2600_PROT_KEY TO_REG(0x00) 92 #define AST2600_SILICON_REV TO_REG(0x04) 93 #define AST2600_SILICON_REV2 TO_REG(0x14) 94 #define AST2600_SYS_RST_CTRL TO_REG(0x40) 95 #define AST2600_SYS_RST_CTRL_CLR TO_REG(0x44) 96 #define AST2600_SYS_RST_CTRL2 TO_REG(0x50) 97 #define AST2600_SYS_RST_CTRL2_CLR TO_REG(0x54) 98 #define AST2600_CLK_STOP_CTRL TO_REG(0x80) 99 #define AST2600_CLK_STOP_CTRL_CLR TO_REG(0x84) 100 #define AST2600_CLK_STOP_CTRL2 TO_REG(0x90) 101 #define AST2600_CLK_STOP_CTRL2_CLR TO_REG(0x94) 102 #define AST2600_SDRAM_HANDSHAKE TO_REG(0x100) 103 #define AST2600_HPLL_PARAM TO_REG(0x200) 104 #define AST2600_HPLL_EXT TO_REG(0x204) 105 #define AST2600_MPLL_EXT TO_REG(0x224) 106 #define AST2600_EPLL_EXT TO_REG(0x244) 107 #define AST2600_CLK_SEL TO_REG(0x300) 108 #define AST2600_CLK_SEL2 TO_REG(0x304) 109 #define AST2600_CLK_SEL3 TO_REG(0x310) 110 #define AST2600_HW_STRAP1 TO_REG(0x500) 111 #define AST2600_HW_STRAP1_CLR TO_REG(0x504) 112 #define AST2600_HW_STRAP1_PROT TO_REG(0x508) 113 #define AST2600_HW_STRAP2 TO_REG(0x510) 114 #define AST2600_HW_STRAP2_CLR TO_REG(0x514) 115 #define AST2600_HW_STRAP2_PROT TO_REG(0x518) 116 #define AST2600_RNG_CTRL TO_REG(0x524) 117 #define AST2600_RNG_DATA TO_REG(0x540) 118 119 #define AST2600_CLK TO_REG(0x40) 120 121 #define SCU_IO_REGION_SIZE 0x1000 122 123 static const uint32_t ast2400_a0_resets[ASPEED_SCU_NR_REGS] = { 124 [SYS_RST_CTRL] = 0xFFCFFEDCU, 125 [CLK_SEL] = 0xF3F40000U, 126 [CLK_STOP_CTRL] = 0x19FC3E8BU, 127 [D2PLL_PARAM] = 0x00026108U, 128 [MPLL_PARAM] = 0x00030291U, 129 [HPLL_PARAM] = 0x00000291U, 130 [MISC_CTRL1] = 0x00000010U, 131 [PCI_CTRL1] = 0x20001A03U, 132 [PCI_CTRL2] = 0x20001A03U, 133 [PCI_CTRL3] = 0x04000030U, 134 [SYS_RST_STATUS] = 0x00000001U, 135 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ 136 [MISC_CTRL2] = 0x00000023U, 137 [RNG_CTRL] = 0x0000000EU, 138 [PINMUX_CTRL2] = 0x0000F000U, 139 [PINMUX_CTRL3] = 0x01000000U, 140 [PINMUX_CTRL4] = 0x000000FFU, 141 [PINMUX_CTRL5] = 0x0000A000U, 142 [WDT_RST_CTRL] = 0x003FFFF3U, 143 [PINMUX_CTRL8] = 0xFFFF0000U, 144 [PINMUX_CTRL9] = 0x000FFFFFU, 145 [FREE_CNTR4] = 0x000000FFU, 146 [FREE_CNTR4_EXT] = 0x000000FFU, 147 [CPU2_BASE_SEG1] = 0x80000000U, 148 [CPU2_BASE_SEG4] = 0x1E600000U, 149 [CPU2_BASE_SEG5] = 0xC0000000U, 150 [UART_HPLL_CLK] = 0x00001903U, 151 [PCIE_CTRL] = 0x0000007BU, 152 [BMC_DEV_ID] = 0x00002402U 153 }; 154 155 /* SCU70 bit 23: 0 24Mhz. bit 11:9: 0b001 AXI:ABH ratio 2:1 */ 156 /* AST2500 revision A1 */ 157 158 static const uint32_t ast2500_a1_resets[ASPEED_SCU_NR_REGS] = { 159 [SYS_RST_CTRL] = 0xFFCFFEDCU, 160 [CLK_SEL] = 0xF3F40000U, 161 [CLK_STOP_CTRL] = 0x19FC3E8BU, 162 [D2PLL_PARAM] = 0x00026108U, 163 [MPLL_PARAM] = 0x00030291U, 164 [HPLL_PARAM] = 0x93000400U, 165 [MISC_CTRL1] = 0x00000010U, 166 [PCI_CTRL1] = 0x20001A03U, 167 [PCI_CTRL2] = 0x20001A03U, 168 [PCI_CTRL3] = 0x04000030U, 169 [SYS_RST_STATUS] = 0x00000001U, 170 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ 171 [MISC_CTRL2] = 0x00000023U, 172 [RNG_CTRL] = 0x0000000EU, 173 [PINMUX_CTRL2] = 0x0000F000U, 174 [PINMUX_CTRL3] = 0x03000000U, 175 [PINMUX_CTRL4] = 0x00000000U, 176 [PINMUX_CTRL5] = 0x0000A000U, 177 [WDT_RST_CTRL] = 0x023FFFF3U, 178 [PINMUX_CTRL8] = 0xFFFF0000U, 179 [PINMUX_CTRL9] = 0x000FFFFFU, 180 [FREE_CNTR4] = 0x000000FFU, 181 [FREE_CNTR4_EXT] = 0x000000FFU, 182 [CPU2_BASE_SEG1] = 0x80000000U, 183 [CPU2_BASE_SEG4] = 0x1E600000U, 184 [CPU2_BASE_SEG5] = 0xC0000000U, 185 [UART_HPLL_CLK] = 0x00001903U, 186 [PCIE_CTRL] = 0x0000007BU, 187 [BMC_DEV_ID] = 0x00002402U 188 }; 189 190 static uint32_t aspeed_scu_get_random(void) 191 { 192 uint32_t num; 193 qemu_guest_getrandom_nofail(&num, sizeof(num)); 194 return num; 195 } 196 197 uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s) 198 { 199 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); 200 uint32_t hpll = asc->calc_hpll(s, s->regs[HPLL_PARAM]); 201 202 return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[CLK_SEL]) + 1) 203 / asc->apb_divider; 204 } 205 206 static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size) 207 { 208 AspeedSCUState *s = ASPEED_SCU(opaque); 209 int reg = TO_REG(offset); 210 211 if (reg >= ASPEED_SCU_NR_REGS) { 212 qemu_log_mask(LOG_GUEST_ERROR, 213 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", 214 __func__, offset); 215 return 0; 216 } 217 218 switch (reg) { 219 case RNG_DATA: 220 /* On hardware, RNG_DATA works regardless of 221 * the state of the enable bit in RNG_CTRL 222 */ 223 s->regs[RNG_DATA] = aspeed_scu_get_random(); 224 break; 225 case WAKEUP_EN: 226 qemu_log_mask(LOG_GUEST_ERROR, 227 "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n", 228 __func__, offset); 229 break; 230 } 231 232 return s->regs[reg]; 233 } 234 235 static void aspeed_scu_write(void *opaque, hwaddr offset, uint64_t data, 236 unsigned size) 237 { 238 AspeedSCUState *s = ASPEED_SCU(opaque); 239 int reg = TO_REG(offset); 240 241 if (reg >= ASPEED_SCU_NR_REGS) { 242 qemu_log_mask(LOG_GUEST_ERROR, 243 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 244 __func__, offset); 245 return; 246 } 247 248 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && 249 !s->regs[PROT_KEY]) { 250 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 251 return; 252 } 253 254 trace_aspeed_scu_write(offset, size, data); 255 256 switch (reg) { 257 case PROT_KEY: 258 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 259 return; 260 case CLK_SEL: 261 s->regs[reg] = data; 262 break; 263 case HW_STRAP1: 264 if (ASPEED_IS_AST2500(s->regs[SILICON_REV])) { 265 s->regs[HW_STRAP1] |= data; 266 return; 267 } 268 /* Jump to assignment below */ 269 break; 270 case SILICON_REV: 271 if (ASPEED_IS_AST2500(s->regs[SILICON_REV])) { 272 s->regs[HW_STRAP1] &= ~data; 273 } else { 274 qemu_log_mask(LOG_GUEST_ERROR, 275 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 276 __func__, offset); 277 } 278 /* Avoid assignment below, we've handled everything */ 279 return; 280 case FREQ_CNTR_EVAL: 281 case VGA_SCRATCH1 ... VGA_SCRATCH8: 282 case RNG_DATA: 283 case FREE_CNTR4: 284 case FREE_CNTR4_EXT: 285 qemu_log_mask(LOG_GUEST_ERROR, 286 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 287 __func__, offset); 288 return; 289 } 290 291 s->regs[reg] = data; 292 } 293 294 static const MemoryRegionOps aspeed_scu_ops = { 295 .read = aspeed_scu_read, 296 .write = aspeed_scu_write, 297 .endianness = DEVICE_LITTLE_ENDIAN, 298 .valid.min_access_size = 4, 299 .valid.max_access_size = 4, 300 .valid.unaligned = false, 301 }; 302 303 static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s) 304 { 305 if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN) { 306 return 25000000; 307 } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) { 308 return 48000000; 309 } else { 310 return 24000000; 311 } 312 } 313 314 /* 315 * Strapped frequencies for the AST2400 in MHz. They depend on the 316 * clkin frequency. 317 */ 318 static const uint32_t hpll_ast2400_freqs[][4] = { 319 { 384, 360, 336, 408 }, /* 24MHz or 48MHz */ 320 { 400, 375, 350, 425 }, /* 25MHz */ 321 }; 322 323 static uint32_t aspeed_2400_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 324 { 325 uint8_t freq_select; 326 bool clk_25m_in; 327 uint32_t clkin = aspeed_scu_get_clkin(s); 328 329 if (hpll_reg & SCU_AST2400_H_PLL_OFF) { 330 return 0; 331 } 332 333 if (hpll_reg & SCU_AST2400_H_PLL_PROGRAMMED) { 334 uint32_t multiplier = 1; 335 336 if (!(hpll_reg & SCU_AST2400_H_PLL_BYPASS_EN)) { 337 uint32_t n = (hpll_reg >> 5) & 0x3f; 338 uint32_t od = (hpll_reg >> 4) & 0x1; 339 uint32_t d = hpll_reg & 0xf; 340 341 multiplier = (2 - od) * ((n + 2) / (d + 1)); 342 } 343 344 return clkin * multiplier; 345 } 346 347 /* HW strapping */ 348 clk_25m_in = !!(s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN); 349 freq_select = SCU_AST2400_HW_STRAP_GET_H_PLL_CLK(s->hw_strap1); 350 351 return hpll_ast2400_freqs[clk_25m_in][freq_select] * 1000000; 352 } 353 354 static uint32_t aspeed_2500_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 355 { 356 uint32_t multiplier = 1; 357 uint32_t clkin = aspeed_scu_get_clkin(s); 358 359 if (hpll_reg & SCU_H_PLL_OFF) { 360 return 0; 361 } 362 363 if (!(hpll_reg & SCU_H_PLL_BYPASS_EN)) { 364 uint32_t p = (hpll_reg >> 13) & 0x3f; 365 uint32_t m = (hpll_reg >> 5) & 0xff; 366 uint32_t n = hpll_reg & 0x1f; 367 368 multiplier = ((m + 1) / (n + 1)) / (p + 1); 369 } 370 371 return clkin * multiplier; 372 } 373 374 static void aspeed_scu_reset(DeviceState *dev) 375 { 376 AspeedSCUState *s = ASPEED_SCU(dev); 377 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 378 379 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 380 s->regs[SILICON_REV] = s->silicon_rev; 381 s->regs[HW_STRAP1] = s->hw_strap1; 382 s->regs[HW_STRAP2] = s->hw_strap2; 383 s->regs[PROT_KEY] = s->hw_prot_key; 384 } 385 386 static uint32_t aspeed_silicon_revs[] = { 387 AST2400_A0_SILICON_REV, 388 AST2400_A1_SILICON_REV, 389 AST2500_A0_SILICON_REV, 390 AST2500_A1_SILICON_REV, 391 AST2600_A0_SILICON_REV, 392 }; 393 394 bool is_supported_silicon_rev(uint32_t silicon_rev) 395 { 396 int i; 397 398 for (i = 0; i < ARRAY_SIZE(aspeed_silicon_revs); i++) { 399 if (silicon_rev == aspeed_silicon_revs[i]) { 400 return true; 401 } 402 } 403 404 return false; 405 } 406 407 static void aspeed_scu_realize(DeviceState *dev, Error **errp) 408 { 409 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 410 AspeedSCUState *s = ASPEED_SCU(dev); 411 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 412 413 if (!is_supported_silicon_rev(s->silicon_rev)) { 414 error_setg(errp, "Unknown silicon revision: 0x%" PRIx32, 415 s->silicon_rev); 416 return; 417 } 418 419 memory_region_init_io(&s->iomem, OBJECT(s), asc->ops, s, 420 TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE); 421 422 sysbus_init_mmio(sbd, &s->iomem); 423 } 424 425 static const VMStateDescription vmstate_aspeed_scu = { 426 .name = "aspeed.scu", 427 .version_id = 2, 428 .minimum_version_id = 2, 429 .fields = (VMStateField[]) { 430 VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_AST2600_SCU_NR_REGS), 431 VMSTATE_END_OF_LIST() 432 } 433 }; 434 435 static Property aspeed_scu_properties[] = { 436 DEFINE_PROP_UINT32("silicon-rev", AspeedSCUState, silicon_rev, 0), 437 DEFINE_PROP_UINT32("hw-strap1", AspeedSCUState, hw_strap1, 0), 438 DEFINE_PROP_UINT32("hw-strap2", AspeedSCUState, hw_strap2, 0), 439 DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0), 440 DEFINE_PROP_END_OF_LIST(), 441 }; 442 443 static void aspeed_scu_class_init(ObjectClass *klass, void *data) 444 { 445 DeviceClass *dc = DEVICE_CLASS(klass); 446 dc->realize = aspeed_scu_realize; 447 dc->reset = aspeed_scu_reset; 448 dc->desc = "ASPEED System Control Unit"; 449 dc->vmsd = &vmstate_aspeed_scu; 450 dc->props = aspeed_scu_properties; 451 } 452 453 static const TypeInfo aspeed_scu_info = { 454 .name = TYPE_ASPEED_SCU, 455 .parent = TYPE_SYS_BUS_DEVICE, 456 .instance_size = sizeof(AspeedSCUState), 457 .class_init = aspeed_scu_class_init, 458 .class_size = sizeof(AspeedSCUClass), 459 .abstract = true, 460 }; 461 462 static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data) 463 { 464 DeviceClass *dc = DEVICE_CLASS(klass); 465 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 466 467 dc->desc = "ASPEED 2400 System Control Unit"; 468 asc->resets = ast2400_a0_resets; 469 asc->calc_hpll = aspeed_2400_scu_calc_hpll; 470 asc->apb_divider = 2; 471 asc->nr_regs = ASPEED_SCU_NR_REGS; 472 asc->ops = &aspeed_scu_ops; 473 } 474 475 static const TypeInfo aspeed_2400_scu_info = { 476 .name = TYPE_ASPEED_2400_SCU, 477 .parent = TYPE_ASPEED_SCU, 478 .instance_size = sizeof(AspeedSCUState), 479 .class_init = aspeed_2400_scu_class_init, 480 }; 481 482 static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data) 483 { 484 DeviceClass *dc = DEVICE_CLASS(klass); 485 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 486 487 dc->desc = "ASPEED 2500 System Control Unit"; 488 asc->resets = ast2500_a1_resets; 489 asc->calc_hpll = aspeed_2500_scu_calc_hpll; 490 asc->apb_divider = 4; 491 asc->nr_regs = ASPEED_SCU_NR_REGS; 492 asc->ops = &aspeed_scu_ops; 493 } 494 495 static const TypeInfo aspeed_2500_scu_info = { 496 .name = TYPE_ASPEED_2500_SCU, 497 .parent = TYPE_ASPEED_SCU, 498 .instance_size = sizeof(AspeedSCUState), 499 .class_init = aspeed_2500_scu_class_init, 500 }; 501 502 static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset, 503 unsigned size) 504 { 505 AspeedSCUState *s = ASPEED_SCU(opaque); 506 int reg = TO_REG(offset); 507 508 if (reg >= ASPEED_AST2600_SCU_NR_REGS) { 509 qemu_log_mask(LOG_GUEST_ERROR, 510 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", 511 __func__, offset); 512 return 0; 513 } 514 515 switch (reg) { 516 case AST2600_HPLL_EXT: 517 case AST2600_EPLL_EXT: 518 case AST2600_MPLL_EXT: 519 /* PLLs are always "locked" */ 520 return s->regs[reg] | BIT(31); 521 case AST2600_RNG_DATA: 522 /* 523 * On hardware, RNG_DATA works regardless of the state of the 524 * enable bit in RNG_CTRL 525 * 526 * TODO: Check this is true for ast2600 527 */ 528 s->regs[AST2600_RNG_DATA] = aspeed_scu_get_random(); 529 break; 530 } 531 532 return s->regs[reg]; 533 } 534 535 static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, 536 uint64_t data64, unsigned size) 537 { 538 AspeedSCUState *s = ASPEED_SCU(opaque); 539 int reg = TO_REG(offset); 540 /* Truncate here so bitwise operations below behave as expected */ 541 uint32_t data = data64; 542 543 if (reg >= ASPEED_AST2600_SCU_NR_REGS) { 544 qemu_log_mask(LOG_GUEST_ERROR, 545 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 546 __func__, offset); 547 return; 548 } 549 550 if (reg > PROT_KEY && !s->regs[PROT_KEY]) { 551 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 552 } 553 554 trace_aspeed_scu_write(offset, size, data); 555 556 switch (reg) { 557 case AST2600_PROT_KEY: 558 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 559 return; 560 case AST2600_HW_STRAP1: 561 case AST2600_HW_STRAP2: 562 if (s->regs[reg + 2]) { 563 return; 564 } 565 /* fall through */ 566 case AST2600_SYS_RST_CTRL: 567 case AST2600_SYS_RST_CTRL2: 568 case AST2600_CLK_STOP_CTRL: 569 case AST2600_CLK_STOP_CTRL2: 570 /* W1S (Write 1 to set) registers */ 571 s->regs[reg] |= data; 572 return; 573 case AST2600_SYS_RST_CTRL_CLR: 574 case AST2600_SYS_RST_CTRL2_CLR: 575 case AST2600_CLK_STOP_CTRL_CLR: 576 case AST2600_CLK_STOP_CTRL2_CLR: 577 case AST2600_HW_STRAP1_CLR: 578 case AST2600_HW_STRAP2_CLR: 579 /* 580 * W1C (Write 1 to clear) registers are offset by one address from 581 * the data register 582 */ 583 s->regs[reg - 1] &= ~data; 584 return; 585 586 case AST2600_RNG_DATA: 587 case AST2600_SILICON_REV: 588 case AST2600_SILICON_REV2: 589 /* Add read only registers here */ 590 qemu_log_mask(LOG_GUEST_ERROR, 591 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 592 __func__, offset); 593 return; 594 } 595 596 s->regs[reg] = data; 597 } 598 599 static const MemoryRegionOps aspeed_ast2600_scu_ops = { 600 .read = aspeed_ast2600_scu_read, 601 .write = aspeed_ast2600_scu_write, 602 .endianness = DEVICE_LITTLE_ENDIAN, 603 .valid.min_access_size = 4, 604 .valid.max_access_size = 4, 605 .valid.unaligned = false, 606 }; 607 608 static const uint32_t ast2600_a0_resets[ASPEED_AST2600_SCU_NR_REGS] = { 609 [AST2600_SILICON_REV] = AST2600_SILICON_REV, 610 [AST2600_SILICON_REV2] = AST2600_SILICON_REV, 611 [AST2600_SYS_RST_CTRL] = 0xF7CFFEDC | 0x100, 612 [AST2600_SYS_RST_CTRL2] = 0xFFFFFFFC, 613 [AST2600_CLK_STOP_CTRL] = 0xEFF43E8B, 614 [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, 615 [AST2600_SDRAM_HANDSHAKE] = 0x00000040, /* SoC completed DRAM init */ 616 [AST2600_HPLL_PARAM] = 0x1000405F, 617 }; 618 619 static void aspeed_ast2600_scu_reset(DeviceState *dev) 620 { 621 AspeedSCUState *s = ASPEED_SCU(dev); 622 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 623 624 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 625 626 s->regs[AST2600_SILICON_REV] = s->silicon_rev; 627 s->regs[AST2600_SILICON_REV2] = s->silicon_rev; 628 s->regs[AST2600_HW_STRAP1] = s->hw_strap1; 629 s->regs[AST2600_HW_STRAP2] = s->hw_strap2; 630 s->regs[PROT_KEY] = s->hw_prot_key; 631 } 632 633 static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data) 634 { 635 DeviceClass *dc = DEVICE_CLASS(klass); 636 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 637 638 dc->desc = "ASPEED 2600 System Control Unit"; 639 dc->reset = aspeed_ast2600_scu_reset; 640 asc->resets = ast2600_a0_resets; 641 asc->calc_hpll = aspeed_2500_scu_calc_hpll; /* No change since AST2500 */ 642 asc->apb_divider = 4; 643 asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; 644 asc->ops = &aspeed_ast2600_scu_ops; 645 } 646 647 static const TypeInfo aspeed_2600_scu_info = { 648 .name = TYPE_ASPEED_2600_SCU, 649 .parent = TYPE_ASPEED_SCU, 650 .instance_size = sizeof(AspeedSCUState), 651 .class_init = aspeed_2600_scu_class_init, 652 }; 653 654 static void aspeed_scu_register_types(void) 655 { 656 type_register_static(&aspeed_scu_info); 657 type_register_static(&aspeed_2400_scu_info); 658 type_register_static(&aspeed_2500_scu_info); 659 type_register_static(&aspeed_2600_scu_info); 660 } 661 662 type_init(aspeed_scu_register_types); 663