aspeed_scu.c (27114B)
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_DEBUG_CTRL TO_REG(0xC8) 105 #define AST2600_DEBUG_CTRL2 TO_REG(0xD8) 106 #define AST2600_SDRAM_HANDSHAKE TO_REG(0x100) 107 #define AST2600_HPLL_PARAM TO_REG(0x200) 108 #define AST2600_HPLL_EXT TO_REG(0x204) 109 #define AST2600_APLL_PARAM TO_REG(0x210) 110 #define AST2600_APLL_EXT TO_REG(0x214) 111 #define AST2600_MPLL_PARAM TO_REG(0x220) 112 #define AST2600_MPLL_EXT TO_REG(0x224) 113 #define AST2600_EPLL_PARAM TO_REG(0x240) 114 #define AST2600_EPLL_EXT TO_REG(0x244) 115 #define AST2600_DPLL_PARAM TO_REG(0x260) 116 #define AST2600_DPLL_EXT TO_REG(0x264) 117 #define AST2600_CLK_SEL TO_REG(0x300) 118 #define AST2600_CLK_SEL2 TO_REG(0x304) 119 #define AST2600_CLK_SEL3 TO_REG(0x308) 120 #define AST2600_CLK_SEL4 TO_REG(0x310) 121 #define AST2600_CLK_SEL5 TO_REG(0x314) 122 #define AST2600_UARTCLK TO_REG(0x338) 123 #define AST2600_HUARTCLK TO_REG(0x33C) 124 #define AST2600_HW_STRAP1 TO_REG(0x500) 125 #define AST2600_HW_STRAP1_CLR TO_REG(0x504) 126 #define AST2600_HW_STRAP1_PROT TO_REG(0x508) 127 #define AST2600_HW_STRAP2 TO_REG(0x510) 128 #define AST2600_HW_STRAP2_CLR TO_REG(0x514) 129 #define AST2600_HW_STRAP2_PROT TO_REG(0x518) 130 #define AST2600_RNG_CTRL TO_REG(0x524) 131 #define AST2600_RNG_DATA TO_REG(0x540) 132 #define AST2600_CHIP_ID0 TO_REG(0x5B0) 133 #define AST2600_CHIP_ID1 TO_REG(0x5B4) 134 135 #define AST2600_CLK TO_REG(0x40) 136 137 #define SCU_IO_REGION_SIZE 0x1000 138 139 static const uint32_t ast2400_a0_resets[ASPEED_SCU_NR_REGS] = { 140 [SYS_RST_CTRL] = 0xFFCFFEDCU, 141 [CLK_SEL] = 0xF3F40000U, 142 [CLK_STOP_CTRL] = 0x19FC3E8BU, 143 [D2PLL_PARAM] = 0x00026108U, 144 [MPLL_PARAM] = 0x00030291U, 145 [HPLL_PARAM] = 0x00000291U, 146 [MISC_CTRL1] = 0x00000010U, 147 [PCI_CTRL1] = 0x20001A03U, 148 [PCI_CTRL2] = 0x20001A03U, 149 [PCI_CTRL3] = 0x04000030U, 150 [SYS_RST_STATUS] = 0x00000001U, 151 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ 152 [MISC_CTRL2] = 0x00000023U, 153 [RNG_CTRL] = 0x0000000EU, 154 [PINMUX_CTRL2] = 0x0000F000U, 155 [PINMUX_CTRL3] = 0x01000000U, 156 [PINMUX_CTRL4] = 0x000000FFU, 157 [PINMUX_CTRL5] = 0x0000A000U, 158 [WDT_RST_CTRL] = 0x003FFFF3U, 159 [PINMUX_CTRL8] = 0xFFFF0000U, 160 [PINMUX_CTRL9] = 0x000FFFFFU, 161 [FREE_CNTR4] = 0x000000FFU, 162 [FREE_CNTR4_EXT] = 0x000000FFU, 163 [CPU2_BASE_SEG1] = 0x80000000U, 164 [CPU2_BASE_SEG4] = 0x1E600000U, 165 [CPU2_BASE_SEG5] = 0xC0000000U, 166 [UART_HPLL_CLK] = 0x00001903U, 167 [PCIE_CTRL] = 0x0000007BU, 168 [BMC_DEV_ID] = 0x00002402U 169 }; 170 171 /* SCU70 bit 23: 0 24Mhz. bit 11:9: 0b001 AXI:ABH ratio 2:1 */ 172 /* AST2500 revision A1 */ 173 174 static const uint32_t ast2500_a1_resets[ASPEED_SCU_NR_REGS] = { 175 [SYS_RST_CTRL] = 0xFFCFFEDCU, 176 [CLK_SEL] = 0xF3F40000U, 177 [CLK_STOP_CTRL] = 0x19FC3E8BU, 178 [D2PLL_PARAM] = 0x00026108U, 179 [MPLL_PARAM] = 0x00030291U, 180 [HPLL_PARAM] = 0x93000400U, 181 [MISC_CTRL1] = 0x00000010U, 182 [PCI_CTRL1] = 0x20001A03U, 183 [PCI_CTRL2] = 0x20001A03U, 184 [PCI_CTRL3] = 0x04000030U, 185 [SYS_RST_STATUS] = 0x00000001U, 186 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ 187 [MISC_CTRL2] = 0x00000023U, 188 [RNG_CTRL] = 0x0000000EU, 189 [PINMUX_CTRL2] = 0x0000F000U, 190 [PINMUX_CTRL3] = 0x03000000U, 191 [PINMUX_CTRL4] = 0x00000000U, 192 [PINMUX_CTRL5] = 0x0000A000U, 193 [WDT_RST_CTRL] = 0x023FFFF3U, 194 [PINMUX_CTRL8] = 0xFFFF0000U, 195 [PINMUX_CTRL9] = 0x000FFFFFU, 196 [FREE_CNTR4] = 0x000000FFU, 197 [FREE_CNTR4_EXT] = 0x000000FFU, 198 [CPU2_BASE_SEG1] = 0x80000000U, 199 [CPU2_BASE_SEG4] = 0x1E600000U, 200 [CPU2_BASE_SEG5] = 0xC0000000U, 201 [CHIP_ID0] = 0x1234ABCDU, 202 [CHIP_ID1] = 0x88884444U, 203 [UART_HPLL_CLK] = 0x00001903U, 204 [PCIE_CTRL] = 0x0000007BU, 205 [BMC_DEV_ID] = 0x00002402U 206 }; 207 208 static uint32_t aspeed_scu_get_random(void) 209 { 210 uint32_t num; 211 qemu_guest_getrandom_nofail(&num, sizeof(num)); 212 return num; 213 } 214 215 uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s) 216 { 217 return ASPEED_SCU_GET_CLASS(s)->get_apb(s); 218 } 219 220 static uint32_t aspeed_2400_scu_get_apb_freq(AspeedSCUState *s) 221 { 222 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); 223 uint32_t hpll = asc->calc_hpll(s, s->regs[HPLL_PARAM]); 224 225 return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[CLK_SEL]) + 1) 226 / asc->apb_divider; 227 } 228 229 static uint32_t aspeed_2600_scu_get_apb_freq(AspeedSCUState *s) 230 { 231 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); 232 uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]); 233 234 return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL]) + 1) 235 / asc->apb_divider; 236 } 237 238 static uint32_t aspeed_1030_scu_get_apb_freq(AspeedSCUState *s) 239 { 240 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); 241 uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]); 242 243 return hpll / (SCU_AST1030_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL4]) + 1) 244 / asc->apb_divider; 245 } 246 247 static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size) 248 { 249 AspeedSCUState *s = ASPEED_SCU(opaque); 250 int reg = TO_REG(offset); 251 252 if (reg >= ASPEED_SCU_NR_REGS) { 253 qemu_log_mask(LOG_GUEST_ERROR, 254 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", 255 __func__, offset); 256 return 0; 257 } 258 259 switch (reg) { 260 case RNG_DATA: 261 /* On hardware, RNG_DATA works regardless of 262 * the state of the enable bit in RNG_CTRL 263 */ 264 s->regs[RNG_DATA] = aspeed_scu_get_random(); 265 break; 266 case WAKEUP_EN: 267 qemu_log_mask(LOG_GUEST_ERROR, 268 "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n", 269 __func__, offset); 270 break; 271 } 272 273 trace_aspeed_scu_read(offset, size, s->regs[reg]); 274 return s->regs[reg]; 275 } 276 277 static void aspeed_ast2400_scu_write(void *opaque, hwaddr offset, 278 uint64_t data, unsigned size) 279 { 280 AspeedSCUState *s = ASPEED_SCU(opaque); 281 int reg = TO_REG(offset); 282 283 if (reg >= ASPEED_SCU_NR_REGS) { 284 qemu_log_mask(LOG_GUEST_ERROR, 285 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 286 __func__, offset); 287 return; 288 } 289 290 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && 291 !s->regs[PROT_KEY]) { 292 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 293 } 294 295 trace_aspeed_scu_write(offset, size, data); 296 297 switch (reg) { 298 case PROT_KEY: 299 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 300 return; 301 case SILICON_REV: 302 case FREQ_CNTR_EVAL: 303 case VGA_SCRATCH1 ... VGA_SCRATCH8: 304 case RNG_DATA: 305 case FREE_CNTR4: 306 case FREE_CNTR4_EXT: 307 qemu_log_mask(LOG_GUEST_ERROR, 308 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 309 __func__, offset); 310 return; 311 } 312 313 s->regs[reg] = data; 314 } 315 316 static void aspeed_ast2500_scu_write(void *opaque, hwaddr offset, 317 uint64_t data, unsigned size) 318 { 319 AspeedSCUState *s = ASPEED_SCU(opaque); 320 int reg = TO_REG(offset); 321 322 if (reg >= ASPEED_SCU_NR_REGS) { 323 qemu_log_mask(LOG_GUEST_ERROR, 324 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 325 __func__, offset); 326 return; 327 } 328 329 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && 330 !s->regs[PROT_KEY]) { 331 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 332 return; 333 } 334 335 trace_aspeed_scu_write(offset, size, data); 336 337 switch (reg) { 338 case PROT_KEY: 339 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 340 return; 341 case HW_STRAP1: 342 s->regs[HW_STRAP1] |= data; 343 return; 344 case SILICON_REV: 345 s->regs[HW_STRAP1] &= ~data; 346 return; 347 case FREQ_CNTR_EVAL: 348 case VGA_SCRATCH1 ... VGA_SCRATCH8: 349 case RNG_DATA: 350 case FREE_CNTR4: 351 case FREE_CNTR4_EXT: 352 case CHIP_ID0: 353 case CHIP_ID1: 354 qemu_log_mask(LOG_GUEST_ERROR, 355 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 356 __func__, offset); 357 return; 358 } 359 360 s->regs[reg] = data; 361 } 362 363 static const MemoryRegionOps aspeed_ast2400_scu_ops = { 364 .read = aspeed_scu_read, 365 .write = aspeed_ast2400_scu_write, 366 .endianness = DEVICE_LITTLE_ENDIAN, 367 .valid = { 368 .min_access_size = 1, 369 .max_access_size = 4, 370 }, 371 }; 372 373 static const MemoryRegionOps aspeed_ast2500_scu_ops = { 374 .read = aspeed_scu_read, 375 .write = aspeed_ast2500_scu_write, 376 .endianness = DEVICE_LITTLE_ENDIAN, 377 .valid.min_access_size = 4, 378 .valid.max_access_size = 4, 379 .valid.unaligned = false, 380 }; 381 382 static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s) 383 { 384 if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN || 385 ASPEED_SCU_GET_CLASS(s)->clkin_25Mhz) { 386 return 25000000; 387 } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) { 388 return 48000000; 389 } else { 390 return 24000000; 391 } 392 } 393 394 /* 395 * Strapped frequencies for the AST2400 in MHz. They depend on the 396 * clkin frequency. 397 */ 398 static const uint32_t hpll_ast2400_freqs[][4] = { 399 { 384, 360, 336, 408 }, /* 24MHz or 48MHz */ 400 { 400, 375, 350, 425 }, /* 25MHz */ 401 }; 402 403 static uint32_t aspeed_2400_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 404 { 405 uint8_t freq_select; 406 bool clk_25m_in; 407 uint32_t clkin = aspeed_scu_get_clkin(s); 408 409 if (hpll_reg & SCU_AST2400_H_PLL_OFF) { 410 return 0; 411 } 412 413 if (hpll_reg & SCU_AST2400_H_PLL_PROGRAMMED) { 414 uint32_t multiplier = 1; 415 416 if (!(hpll_reg & SCU_AST2400_H_PLL_BYPASS_EN)) { 417 uint32_t n = (hpll_reg >> 5) & 0x3f; 418 uint32_t od = (hpll_reg >> 4) & 0x1; 419 uint32_t d = hpll_reg & 0xf; 420 421 multiplier = (2 - od) * ((n + 2) / (d + 1)); 422 } 423 424 return clkin * multiplier; 425 } 426 427 /* HW strapping */ 428 clk_25m_in = !!(s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN); 429 freq_select = SCU_AST2400_HW_STRAP_GET_H_PLL_CLK(s->hw_strap1); 430 431 return hpll_ast2400_freqs[clk_25m_in][freq_select] * 1000000; 432 } 433 434 static uint32_t aspeed_2500_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 435 { 436 uint32_t multiplier = 1; 437 uint32_t clkin = aspeed_scu_get_clkin(s); 438 439 if (hpll_reg & SCU_H_PLL_OFF) { 440 return 0; 441 } 442 443 if (!(hpll_reg & SCU_H_PLL_BYPASS_EN)) { 444 uint32_t p = (hpll_reg >> 13) & 0x3f; 445 uint32_t m = (hpll_reg >> 5) & 0xff; 446 uint32_t n = hpll_reg & 0x1f; 447 448 multiplier = ((m + 1) / (n + 1)) / (p + 1); 449 } 450 451 return clkin * multiplier; 452 } 453 454 static uint32_t aspeed_2600_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) 455 { 456 uint32_t multiplier = 1; 457 uint32_t clkin = aspeed_scu_get_clkin(s); 458 459 if (hpll_reg & SCU_AST2600_H_PLL_OFF) { 460 return 0; 461 } 462 463 if (!(hpll_reg & SCU_AST2600_H_PLL_BYPASS_EN)) { 464 uint32_t p = (hpll_reg >> 19) & 0xf; 465 uint32_t n = (hpll_reg >> 13) & 0x3f; 466 uint32_t m = hpll_reg & 0x1fff; 467 468 multiplier = ((m + 1) / (n + 1)) / (p + 1); 469 } 470 471 return clkin * multiplier; 472 } 473 474 static void aspeed_scu_reset(DeviceState *dev) 475 { 476 AspeedSCUState *s = ASPEED_SCU(dev); 477 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 478 479 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 480 s->regs[SILICON_REV] = s->silicon_rev; 481 s->regs[HW_STRAP1] = s->hw_strap1; 482 s->regs[HW_STRAP2] = s->hw_strap2; 483 s->regs[PROT_KEY] = s->hw_prot_key; 484 } 485 486 static uint32_t aspeed_silicon_revs[] = { 487 AST2400_A0_SILICON_REV, 488 AST2400_A1_SILICON_REV, 489 AST2500_A0_SILICON_REV, 490 AST2500_A1_SILICON_REV, 491 AST2600_A0_SILICON_REV, 492 AST2600_A1_SILICON_REV, 493 AST2600_A2_SILICON_REV, 494 AST2600_A3_SILICON_REV, 495 AST1030_A0_SILICON_REV, 496 AST1030_A1_SILICON_REV, 497 }; 498 499 bool is_supported_silicon_rev(uint32_t silicon_rev) 500 { 501 int i; 502 503 for (i = 0; i < ARRAY_SIZE(aspeed_silicon_revs); i++) { 504 if (silicon_rev == aspeed_silicon_revs[i]) { 505 return true; 506 } 507 } 508 509 return false; 510 } 511 512 static void aspeed_scu_realize(DeviceState *dev, Error **errp) 513 { 514 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 515 AspeedSCUState *s = ASPEED_SCU(dev); 516 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 517 518 if (!is_supported_silicon_rev(s->silicon_rev)) { 519 error_setg(errp, "Unknown silicon revision: 0x%" PRIx32, 520 s->silicon_rev); 521 return; 522 } 523 524 memory_region_init_io(&s->iomem, OBJECT(s), asc->ops, s, 525 TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE); 526 527 sysbus_init_mmio(sbd, &s->iomem); 528 } 529 530 static const VMStateDescription vmstate_aspeed_scu = { 531 .name = "aspeed.scu", 532 .version_id = 2, 533 .minimum_version_id = 2, 534 .fields = (VMStateField[]) { 535 VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_AST2600_SCU_NR_REGS), 536 VMSTATE_END_OF_LIST() 537 } 538 }; 539 540 static Property aspeed_scu_properties[] = { 541 DEFINE_PROP_UINT32("silicon-rev", AspeedSCUState, silicon_rev, 0), 542 DEFINE_PROP_UINT32("hw-strap1", AspeedSCUState, hw_strap1, 0), 543 DEFINE_PROP_UINT32("hw-strap2", AspeedSCUState, hw_strap2, 0), 544 DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0), 545 DEFINE_PROP_END_OF_LIST(), 546 }; 547 548 static void aspeed_scu_class_init(ObjectClass *klass, void *data) 549 { 550 DeviceClass *dc = DEVICE_CLASS(klass); 551 dc->realize = aspeed_scu_realize; 552 dc->reset = aspeed_scu_reset; 553 dc->desc = "ASPEED System Control Unit"; 554 dc->vmsd = &vmstate_aspeed_scu; 555 device_class_set_props(dc, aspeed_scu_properties); 556 } 557 558 static const TypeInfo aspeed_scu_info = { 559 .name = TYPE_ASPEED_SCU, 560 .parent = TYPE_SYS_BUS_DEVICE, 561 .instance_size = sizeof(AspeedSCUState), 562 .class_init = aspeed_scu_class_init, 563 .class_size = sizeof(AspeedSCUClass), 564 .abstract = true, 565 }; 566 567 static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data) 568 { 569 DeviceClass *dc = DEVICE_CLASS(klass); 570 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 571 572 dc->desc = "ASPEED 2400 System Control Unit"; 573 asc->resets = ast2400_a0_resets; 574 asc->calc_hpll = aspeed_2400_scu_calc_hpll; 575 asc->get_apb = aspeed_2400_scu_get_apb_freq; 576 asc->apb_divider = 2; 577 asc->nr_regs = ASPEED_SCU_NR_REGS; 578 asc->clkin_25Mhz = false; 579 asc->ops = &aspeed_ast2400_scu_ops; 580 } 581 582 static const TypeInfo aspeed_2400_scu_info = { 583 .name = TYPE_ASPEED_2400_SCU, 584 .parent = TYPE_ASPEED_SCU, 585 .instance_size = sizeof(AspeedSCUState), 586 .class_init = aspeed_2400_scu_class_init, 587 }; 588 589 static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data) 590 { 591 DeviceClass *dc = DEVICE_CLASS(klass); 592 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 593 594 dc->desc = "ASPEED 2500 System Control Unit"; 595 asc->resets = ast2500_a1_resets; 596 asc->calc_hpll = aspeed_2500_scu_calc_hpll; 597 asc->get_apb = aspeed_2400_scu_get_apb_freq; 598 asc->apb_divider = 4; 599 asc->nr_regs = ASPEED_SCU_NR_REGS; 600 asc->clkin_25Mhz = false; 601 asc->ops = &aspeed_ast2500_scu_ops; 602 } 603 604 static const TypeInfo aspeed_2500_scu_info = { 605 .name = TYPE_ASPEED_2500_SCU, 606 .parent = TYPE_ASPEED_SCU, 607 .instance_size = sizeof(AspeedSCUState), 608 .class_init = aspeed_2500_scu_class_init, 609 }; 610 611 static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset, 612 unsigned size) 613 { 614 AspeedSCUState *s = ASPEED_SCU(opaque); 615 int reg = TO_REG(offset); 616 617 if (reg >= ASPEED_AST2600_SCU_NR_REGS) { 618 qemu_log_mask(LOG_GUEST_ERROR, 619 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", 620 __func__, offset); 621 return 0; 622 } 623 624 switch (reg) { 625 case AST2600_HPLL_EXT: 626 case AST2600_EPLL_EXT: 627 case AST2600_MPLL_EXT: 628 /* PLLs are always "locked" */ 629 return s->regs[reg] | BIT(31); 630 case AST2600_RNG_DATA: 631 /* 632 * On hardware, RNG_DATA works regardless of the state of the 633 * enable bit in RNG_CTRL 634 * 635 * TODO: Check this is true for ast2600 636 */ 637 s->regs[AST2600_RNG_DATA] = aspeed_scu_get_random(); 638 break; 639 } 640 641 trace_aspeed_scu_read(offset, size, s->regs[reg]); 642 return s->regs[reg]; 643 } 644 645 static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, 646 uint64_t data64, unsigned size) 647 { 648 AspeedSCUState *s = ASPEED_SCU(opaque); 649 int reg = TO_REG(offset); 650 /* Truncate here so bitwise operations below behave as expected */ 651 uint32_t data = data64; 652 653 if (reg >= ASPEED_AST2600_SCU_NR_REGS) { 654 qemu_log_mask(LOG_GUEST_ERROR, 655 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", 656 __func__, offset); 657 return; 658 } 659 660 if (reg > PROT_KEY && !s->regs[PROT_KEY]) { 661 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); 662 } 663 664 trace_aspeed_scu_write(offset, size, data); 665 666 switch (reg) { 667 case AST2600_PROT_KEY: 668 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; 669 return; 670 case AST2600_HW_STRAP1: 671 case AST2600_HW_STRAP2: 672 if (s->regs[reg + 2]) { 673 return; 674 } 675 /* fall through */ 676 case AST2600_SYS_RST_CTRL: 677 case AST2600_SYS_RST_CTRL2: 678 case AST2600_CLK_STOP_CTRL: 679 case AST2600_CLK_STOP_CTRL2: 680 /* W1S (Write 1 to set) registers */ 681 s->regs[reg] |= data; 682 return; 683 case AST2600_SYS_RST_CTRL_CLR: 684 case AST2600_SYS_RST_CTRL2_CLR: 685 case AST2600_CLK_STOP_CTRL_CLR: 686 case AST2600_CLK_STOP_CTRL2_CLR: 687 case AST2600_HW_STRAP1_CLR: 688 case AST2600_HW_STRAP2_CLR: 689 /* 690 * W1C (Write 1 to clear) registers are offset by one address from 691 * the data register 692 */ 693 s->regs[reg - 1] &= ~data; 694 return; 695 696 case AST2600_RNG_DATA: 697 case AST2600_SILICON_REV: 698 case AST2600_SILICON_REV2: 699 case AST2600_CHIP_ID0: 700 case AST2600_CHIP_ID1: 701 /* Add read only registers here */ 702 qemu_log_mask(LOG_GUEST_ERROR, 703 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", 704 __func__, offset); 705 return; 706 } 707 708 s->regs[reg] = data; 709 } 710 711 static const MemoryRegionOps aspeed_ast2600_scu_ops = { 712 .read = aspeed_ast2600_scu_read, 713 .write = aspeed_ast2600_scu_write, 714 .endianness = DEVICE_LITTLE_ENDIAN, 715 .valid.min_access_size = 4, 716 .valid.max_access_size = 4, 717 .valid.unaligned = false, 718 }; 719 720 static const uint32_t ast2600_a3_resets[ASPEED_AST2600_SCU_NR_REGS] = { 721 [AST2600_SYS_RST_CTRL] = 0xF7C3FED8, 722 [AST2600_SYS_RST_CTRL2] = 0x0DFFFFFC, 723 [AST2600_CLK_STOP_CTRL] = 0xFFFF7F8A, 724 [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, 725 [AST2600_DEBUG_CTRL] = 0x00000FFF, 726 [AST2600_DEBUG_CTRL2] = 0x000000FF, 727 [AST2600_SDRAM_HANDSHAKE] = 0x00000000, 728 [AST2600_HPLL_PARAM] = 0x1000408F, 729 [AST2600_APLL_PARAM] = 0x1000405F, 730 [AST2600_MPLL_PARAM] = 0x1008405F, 731 [AST2600_EPLL_PARAM] = 0x1004077F, 732 [AST2600_DPLL_PARAM] = 0x1078405F, 733 [AST2600_CLK_SEL] = 0xF3940000, 734 [AST2600_CLK_SEL2] = 0x00700000, 735 [AST2600_CLK_SEL3] = 0x00000000, 736 [AST2600_CLK_SEL4] = 0xF3F40000, 737 [AST2600_CLK_SEL5] = 0x30000000, 738 [AST2600_UARTCLK] = 0x00014506, 739 [AST2600_HUARTCLK] = 0x000145C0, 740 [AST2600_CHIP_ID0] = 0x1234ABCD, 741 [AST2600_CHIP_ID1] = 0x88884444, 742 }; 743 744 static void aspeed_ast2600_scu_reset(DeviceState *dev) 745 { 746 AspeedSCUState *s = ASPEED_SCU(dev); 747 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 748 749 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 750 751 /* 752 * A0 reports A0 in _REV, but subsequent revisions report A1 regardless 753 * of actual revision. QEMU and Linux only support A1 onwards so this is 754 * sufficient. 755 */ 756 s->regs[AST2600_SILICON_REV] = AST2600_A3_SILICON_REV; 757 s->regs[AST2600_SILICON_REV2] = s->silicon_rev; 758 s->regs[AST2600_HW_STRAP1] = s->hw_strap1; 759 s->regs[AST2600_HW_STRAP2] = s->hw_strap2; 760 s->regs[PROT_KEY] = s->hw_prot_key; 761 } 762 763 static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data) 764 { 765 DeviceClass *dc = DEVICE_CLASS(klass); 766 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 767 768 dc->desc = "ASPEED 2600 System Control Unit"; 769 dc->reset = aspeed_ast2600_scu_reset; 770 asc->resets = ast2600_a3_resets; 771 asc->calc_hpll = aspeed_2600_scu_calc_hpll; 772 asc->get_apb = aspeed_2600_scu_get_apb_freq; 773 asc->apb_divider = 4; 774 asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; 775 asc->clkin_25Mhz = true; 776 asc->ops = &aspeed_ast2600_scu_ops; 777 } 778 779 static const TypeInfo aspeed_2600_scu_info = { 780 .name = TYPE_ASPEED_2600_SCU, 781 .parent = TYPE_ASPEED_SCU, 782 .instance_size = sizeof(AspeedSCUState), 783 .class_init = aspeed_2600_scu_class_init, 784 }; 785 786 static const uint32_t ast1030_a1_resets[ASPEED_AST2600_SCU_NR_REGS] = { 787 [AST2600_SYS_RST_CTRL] = 0xFFC3FED8, 788 [AST2600_SYS_RST_CTRL2] = 0x09FFFFFC, 789 [AST2600_CLK_STOP_CTRL] = 0xFFFF7F8A, 790 [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, 791 [AST2600_DEBUG_CTRL2] = 0x00000000, 792 [AST2600_HPLL_PARAM] = 0x10004077, 793 [AST2600_HPLL_EXT] = 0x00000031, 794 [AST2600_CLK_SEL4] = 0x43F90900, 795 [AST2600_CLK_SEL5] = 0x40000000, 796 [AST2600_CHIP_ID0] = 0xDEADBEEF, 797 [AST2600_CHIP_ID1] = 0x0BADCAFE, 798 }; 799 800 static void aspeed_ast1030_scu_reset(DeviceState *dev) 801 { 802 AspeedSCUState *s = ASPEED_SCU(dev); 803 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); 804 805 memcpy(s->regs, asc->resets, asc->nr_regs * 4); 806 807 s->regs[AST2600_SILICON_REV] = AST1030_A1_SILICON_REV; 808 s->regs[AST2600_SILICON_REV2] = s->silicon_rev; 809 s->regs[AST2600_HW_STRAP1] = s->hw_strap1; 810 s->regs[AST2600_HW_STRAP2] = s->hw_strap2; 811 s->regs[PROT_KEY] = s->hw_prot_key; 812 } 813 814 static void aspeed_1030_scu_class_init(ObjectClass *klass, void *data) 815 { 816 DeviceClass *dc = DEVICE_CLASS(klass); 817 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); 818 819 dc->desc = "ASPEED 1030 System Control Unit"; 820 dc->reset = aspeed_ast1030_scu_reset; 821 asc->resets = ast1030_a1_resets; 822 asc->calc_hpll = aspeed_2600_scu_calc_hpll; 823 asc->get_apb = aspeed_1030_scu_get_apb_freq; 824 asc->apb_divider = 2; 825 asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; 826 asc->clkin_25Mhz = true; 827 asc->ops = &aspeed_ast2600_scu_ops; 828 } 829 830 static const TypeInfo aspeed_1030_scu_info = { 831 .name = TYPE_ASPEED_1030_SCU, 832 .parent = TYPE_ASPEED_SCU, 833 .instance_size = sizeof(AspeedSCUState), 834 .class_init = aspeed_1030_scu_class_init, 835 }; 836 837 static void aspeed_scu_register_types(void) 838 { 839 type_register_static(&aspeed_scu_info); 840 type_register_static(&aspeed_2400_scu_info); 841 type_register_static(&aspeed_2500_scu_info); 842 type_register_static(&aspeed_2600_scu_info); 843 type_register_static(&aspeed_1030_scu_info); 844 } 845 846 type_init(aspeed_scu_register_types);