hw/misc/zynq_slcr.c

   1 /*
   2  * Status and system control registers for Xilinx Zynq Platform
   3  *
   4  * Copyright (c) 2011 Michal Simek <monstr@monstr.eu>
   5  * Copyright (c) 2012 PetaLogix Pty Ltd.
   6  * Based on hw/arm_sysctl.c, written by Paul Brook
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version
  11  * 2 of the License, or (at your option) any later version.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include "qemu/osdep.h"
  18 #include "hw/hw.h"
  19 #include "qemu/timer.h"
  20 #include "hw/sysbus.h"
  21 #include "sysemu/sysemu.h"
  22 #include "qemu/log.h"
  23
  24 #ifndef ZYNQ_SLCR_ERR_DEBUG
  25 #define ZYNQ_SLCR_ERR_DEBUG 0
  26 #endif
  27
  28 #define DB_PRINT(...) do { \
  29         if (ZYNQ_SLCR_ERR_DEBUG) { \
  30             fprintf(stderr,  ": %s: ", __func__); \
  31             fprintf(stderr, ## __VA_ARGS__); \
  32         } \
  33     } while (0);
  34
  35 #define XILINX_LOCK_KEY 0x767b
  36 #define XILINX_UNLOCK_KEY 0xdf0d
  37
  38 #define R_PSS_RST_CTRL_SOFT_RST 0x1
  39
  40 enum {
  41     SCL             = 0x000 / 4,
  42     LOCK,
  43     UNLOCK,
  44     LOCKSTA,
  45
  46     ARM_PLL_CTRL    = 0x100 / 4,
  47     DDR_PLL_CTRL,
  48     IO_PLL_CTRL,
  49     PLL_STATUS,
  50     ARM_PLL_CFG,
  51     DDR_PLL_CFG,
  52     IO_PLL_CFG,
  53
  54     ARM_CLK_CTRL    = 0x120 / 4,
  55     DDR_CLK_CTRL,
  56     DCI_CLK_CTRL,
  57     APER_CLK_CTRL,
  58     USB0_CLK_CTRL,
  59     USB1_CLK_CTRL,
  60     GEM0_RCLK_CTRL,
  61     GEM1_RCLK_CTRL,
  62     GEM0_CLK_CTRL,
  63     GEM1_CLK_CTRL,
  64     SMC_CLK_CTRL,
  65     LQSPI_CLK_CTRL,
  66     SDIO_CLK_CTRL,
  67     UART_CLK_CTRL,
  68     SPI_CLK_CTRL,
  69     CAN_CLK_CTRL,
  70     CAN_MIOCLK_CTRL,
  71     DBG_CLK_CTRL,
  72     PCAP_CLK_CTRL,
  73     TOPSW_CLK_CTRL,
  74
  75 #define FPGA_CTRL_REGS(n, start) \
  76     FPGA ## n ## _CLK_CTRL = (start) / 4, \
  77     FPGA ## n ## _THR_CTRL, \
  78     FPGA ## n ## _THR_CNT, \
  79     FPGA ## n ## _THR_STA,
  80     FPGA_CTRL_REGS(0, 0x170)
  81     FPGA_CTRL_REGS(1, 0x180)
  82     FPGA_CTRL_REGS(2, 0x190)
  83     FPGA_CTRL_REGS(3, 0x1a0)
  84
  85     BANDGAP_TRIP    = 0x1b8 / 4,
  86     PLL_PREDIVISOR  = 0x1c0 / 4,
  87     CLK_621_TRUE,
  88
  89     PSS_RST_CTRL    = 0x200 / 4,
  90     DDR_RST_CTRL,
  91     TOPSW_RESET_CTRL,
  92     DMAC_RST_CTRL,
  93     USB_RST_CTRL,
  94     GEM_RST_CTRL,
  95     SDIO_RST_CTRL,
  96     SPI_RST_CTRL,
  97     CAN_RST_CTRL,
  98     I2C_RST_CTRL,
  99     UART_RST_CTRL,
 100     GPIO_RST_CTRL,
 101     LQSPI_RST_CTRL,
 102     SMC_RST_CTRL,
 103     OCM_RST_CTRL,
 104     FPGA_RST_CTRL   = 0x240 / 4,
 105     A9_CPU_RST_CTRL,
 106
 107     RS_AWDT_CTRL    = 0x24c / 4,
 108     RST_REASON,
 109
 110     REBOOT_STATUS   = 0x258 / 4,
 111     BOOT_MODE,
 112
 113     APU_CTRL        = 0x300 / 4,
 114     WDT_CLK_SEL,
 115
 116     TZ_DMA_NS       = 0x440 / 4,
 117     TZ_DMA_IRQ_NS,
 118     TZ_DMA_PERIPH_NS,
 119
 120     PSS_IDCODE      = 0x530 / 4,
 121
 122     DDR_URGENT      = 0x600 / 4,
 123     DDR_CAL_START   = 0x60c / 4,
 124     DDR_REF_START   = 0x614 / 4,
 125     DDR_CMD_STA,
 126     DDR_URGENT_SEL,
 127     DDR_DFI_STATUS,
 128
 129     MIO             = 0x700 / 4,
 130 #define MIO_LENGTH 54
 131
 132     MIO_LOOPBACK    = 0x804 / 4,
 133     MIO_MST_TRI0,
 134     MIO_MST_TRI1,
 135
 136     SD0_WP_CD_SEL   = 0x830 / 4,
 137     SD1_WP_CD_SEL,
 138
 139     LVL_SHFTR_EN    = 0x900 / 4,
 140     OCM_CFG         = 0x910 / 4,
 141
 142     CPU_RAM         = 0xa00 / 4,
 143
 144     IOU             = 0xa30 / 4,
 145
 146     DMAC_RAM        = 0xa50 / 4,
 147
 148     AFI0            = 0xa60 / 4,
 149     AFI1 = AFI0 + 3,
 150     AFI2 = AFI1 + 3,
 151     AFI3 = AFI2 + 3,
 152 #define AFI_LENGTH 3
 153
 154     OCM             = 0xa90 / 4,
 155
 156     DEVCI_RAM       = 0xaa0 / 4,
 157
 158     CSG_RAM         = 0xab0 / 4,
 159
 160     GPIOB_CTRL      = 0xb00 / 4,
 161     GPIOB_CFG_CMOS18,
 162     GPIOB_CFG_CMOS25,
 163     GPIOB_CFG_CMOS33,
 164     GPIOB_CFG_HSTL  = 0xb14 / 4,
 165     GPIOB_DRVR_BIAS_CTRL,
 166
 167     DDRIOB          = 0xb40 / 4,
 168 #define DDRIOB_LENGTH 14
 169 };
 170
 171 #define ZYNQ_SLCR_MMIO_SIZE     0x1000
 172 #define ZYNQ_SLCR_NUM_REGS      (ZYNQ_SLCR_MMIO_SIZE / 4)
 173
 174 #define TYPE_ZYNQ_SLCR "xilinx,zynq_slcr"
 175 #define ZYNQ_SLCR(obj) OBJECT_CHECK(ZynqSLCRState, (obj), TYPE_ZYNQ_SLCR)
 176
 177 typedef struct ZynqSLCRState {
 178     SysBusDevice parent_obj;
 179
 180     MemoryRegion iomem;
 181
 182     uint32_t regs[ZYNQ_SLCR_NUM_REGS];
 183 } ZynqSLCRState;
 184
 185 static void zynq_slcr_reset(DeviceState *d)
 186 {
 187     ZynqSLCRState *s = ZYNQ_SLCR(d);
 188     int i;
 189
 190     DB_PRINT("RESET\n");
 191
 192     s->regs[LOCKSTA] = 1;
 193     /* 0x100 - 0x11C */
 194     s->regs[ARM_PLL_CTRL]   = 0x0001A008;
 195     s->regs[DDR_PLL_CTRL]   = 0x0001A008;
 196     s->regs[IO_PLL_CTRL]    = 0x0001A008;
 197     s->regs[PLL_STATUS]     = 0x0000003F;
 198     s->regs[ARM_PLL_CFG]    = 0x00014000;
 199     s->regs[DDR_PLL_CFG]    = 0x00014000;
 200     s->regs[IO_PLL_CFG]     = 0x00014000;
 201
 202     /* 0x120 - 0x16C */
 203     s->regs[ARM_CLK_CTRL]   = 0x1F000400;
 204     s->regs[DDR_CLK_CTRL]   = 0x18400003;
 205     s->regs[DCI_CLK_CTRL]   = 0x01E03201;
 206     s->regs[APER_CLK_CTRL]  = 0x01FFCCCD;
 207     s->regs[USB0_CLK_CTRL]  = s->regs[USB1_CLK_CTRL]    = 0x00101941;
 208     s->regs[GEM0_RCLK_CTRL] = s->regs[GEM1_RCLK_CTRL]   = 0x00000001;
 209     s->regs[GEM0_CLK_CTRL]  = s->regs[GEM1_CLK_CTRL]    = 0x00003C01;
 210     s->regs[SMC_CLK_CTRL]   = 0x00003C01;
 211     s->regs[LQSPI_CLK_CTRL] = 0x00002821;
 212     s->regs[SDIO_CLK_CTRL]  = 0x00001E03;
 213     s->regs[UART_CLK_CTRL]  = 0x00003F03;
 214     s->regs[SPI_CLK_CTRL]   = 0x00003F03;
 215     s->regs[CAN_CLK_CTRL]   = 0x00501903;
 216     s->regs[DBG_CLK_CTRL]   = 0x00000F03;
 217     s->regs[PCAP_CLK_CTRL]  = 0x00000F01;
 218
 219     /* 0x170 - 0x1AC */
 220     s->regs[FPGA0_CLK_CTRL] = s->regs[FPGA1_CLK_CTRL] = s->regs[FPGA2_CLK_CTRL]
 221                             = s->regs[FPGA3_CLK_CTRL] = 0x00101800;
 222     s->regs[FPGA0_THR_STA] = s->regs[FPGA1_THR_STA] = s->regs[FPGA2_THR_STA]
 223                            = s->regs[FPGA3_THR_STA] = 0x00010000;
 224
 225     /* 0x1B0 - 0x1D8 */
 226     s->regs[BANDGAP_TRIP]   = 0x0000001F;
 227     s->regs[PLL_PREDIVISOR] = 0x00000001;
 228     s->regs[CLK_621_TRUE]   = 0x00000001;
 229
 230     /* 0x200 - 0x25C */
 231     s->regs[FPGA_RST_CTRL]  = 0x01F33F0F;
 232     s->regs[RST_REASON]     = 0x00000040;
 233
 234     s->regs[BOOT_MODE]      = 0x00000001;
 235
 236     /* 0x700 - 0x7D4 */
 237     for (i = 0; i < 54; i++) {
 238         s->regs[MIO + i] = 0x00001601;
 239     }
 240     for (i = 2; i <= 8; i++) {
 241         s->regs[MIO + i] = 0x00000601;
 242     }
 243
 244     s->regs[MIO_MST_TRI0] = s->regs[MIO_MST_TRI1] = 0xFFFFFFFF;
 245
 246     s->regs[CPU_RAM + 0] = s->regs[CPU_RAM + 1] = s->regs[CPU_RAM + 3]
 247                          = s->regs[CPU_RAM + 4] = s->regs[CPU_RAM + 7]
 248                          = 0x00010101;
 249     s->regs[CPU_RAM + 2] = s->regs[CPU_RAM + 5] = 0x01010101;
 250     s->regs[CPU_RAM + 6] = 0x00000001;
 251
 252     s->regs[IOU + 0] = s->regs[IOU + 1] = s->regs[IOU + 2] = s->regs[IOU + 3]
 253                      = 0x09090909;
 254     s->regs[IOU + 4] = s->regs[IOU + 5] = 0x00090909;
 255     s->regs[IOU + 6] = 0x00000909;
 256
 257     s->regs[DMAC_RAM] = 0x00000009;
 258
 259     s->regs[AFI0 + 0] = s->regs[AFI0 + 1] = 0x09090909;
 260     s->regs[AFI1 + 0] = s->regs[AFI1 + 1] = 0x09090909;
 261     s->regs[AFI2 + 0] = s->regs[AFI2 + 1] = 0x09090909;
 262     s->regs[AFI3 + 0] = s->regs[AFI3 + 1] = 0x09090909;
 263     s->regs[AFI0 + 2] = s->regs[AFI1 + 2] = s->regs[AFI2 + 2]
 264                       = s->regs[AFI3 + 2] = 0x00000909;
 265
 266     s->regs[OCM + 0]    = 0x01010101;
 267     s->regs[OCM + 1]    = s->regs[OCM + 2] = 0x09090909;
 268
 269     s->regs[DEVCI_RAM]  = 0x00000909;
 270     s->regs[CSG_RAM]    = 0x00000001;
 271
 272     s->regs[DDRIOB + 0] = s->regs[DDRIOB + 1] = s->regs[DDRIOB + 2]
 273                         = s->regs[DDRIOB + 3] = 0x00000e00;
 274     s->regs[DDRIOB + 4] = s->regs[DDRIOB + 5] = s->regs[DDRIOB + 6]
 275                         = 0x00000e00;
 276     s->regs[DDRIOB + 12] = 0x00000021;
 277 }
 278
 279
 280 static bool zynq_slcr_check_offset(hwaddr offset, bool rnw)
 281 {
 282     switch (offset) {
 283     case LOCK:
 284     case UNLOCK:
 285     case DDR_CAL_START:
 286     case DDR_REF_START:
 287         return !rnw; /* Write only */
 288     case LOCKSTA:
 289     case FPGA0_THR_STA:
 290     case FPGA1_THR_STA:
 291     case FPGA2_THR_STA:
 292     case FPGA3_THR_STA:
 293     case BOOT_MODE:
 294     case PSS_IDCODE:
 295     case DDR_CMD_STA:
 296     case DDR_DFI_STATUS:
 297     case PLL_STATUS:
 298         return rnw;/* read only */
 299     case SCL:
 300     case ARM_PLL_CTRL ... IO_PLL_CTRL:
 301     case ARM_PLL_CFG ... IO_PLL_CFG:
 302     case ARM_CLK_CTRL ... TOPSW_CLK_CTRL:
 303     case FPGA0_CLK_CTRL ... FPGA0_THR_CNT:
 304     case FPGA1_CLK_CTRL ... FPGA1_THR_CNT:
 305     case FPGA2_CLK_CTRL ... FPGA2_THR_CNT:
 306     case FPGA3_CLK_CTRL ... FPGA3_THR_CNT:
 307     case BANDGAP_TRIP:
 308     case PLL_PREDIVISOR:
 309     case CLK_621_TRUE:
 310     case PSS_RST_CTRL ... A9_CPU_RST_CTRL:
 311     case RS_AWDT_CTRL:
 312     case RST_REASON:
 313     case REBOOT_STATUS:
 314     case APU_CTRL:
 315     case WDT_CLK_SEL:
 316     case TZ_DMA_NS ... TZ_DMA_PERIPH_NS:
 317     case DDR_URGENT:
 318     case DDR_URGENT_SEL:
 319     case MIO ... MIO + MIO_LENGTH - 1:
 320     case MIO_LOOPBACK ... MIO_MST_TRI1:
 321     case SD0_WP_CD_SEL:
 322     case SD1_WP_CD_SEL:
 323     case LVL_SHFTR_EN:
 324     case OCM_CFG:
 325     case CPU_RAM:
 326     case IOU:
 327     case DMAC_RAM:
 328     case AFI0 ... AFI3 + AFI_LENGTH - 1:
 329     case OCM:
 330     case DEVCI_RAM:
 331     case CSG_RAM:
 332     case GPIOB_CTRL ... GPIOB_CFG_CMOS33:
 333     case GPIOB_CFG_HSTL:
 334     case GPIOB_DRVR_BIAS_CTRL:
 335     case DDRIOB ... DDRIOB + DDRIOB_LENGTH - 1:
 336         return true;
 337     default:
 338         return false;
 339     }
 340 }
 341
 342 static uint64_t zynq_slcr_read(void *opaque, hwaddr offset,
 343     unsigned size)
 344 {
 345     ZynqSLCRState *s = opaque;
 346     offset /= 4;
 347     uint32_t ret = s->regs[offset];
 348
 349     if (!zynq_slcr_check_offset(offset, true)) {
 350         qemu_log_mask(LOG_GUEST_ERROR, "zynq_slcr: Invalid read access to "
 351                       " addr %" HWADDR_PRIx "\n", offset * 4);
 352     }
 353
 354     DB_PRINT("addr: %08" HWADDR_PRIx " data: %08" PRIx32 "\n", offset * 4, ret);
 355     return ret;
 356 }
 357
 358 static void zynq_slcr_write(void *opaque, hwaddr offset,
 359                           uint64_t val, unsigned size)
 360 {
 361     ZynqSLCRState *s = (ZynqSLCRState *)opaque;
 362     offset /= 4;
 363
 364     DB_PRINT("addr: %08" HWADDR_PRIx " data: %08" PRIx64 "\n", offset * 4, val);
 365
 366     if (!zynq_slcr_check_offset(offset, false)) {
 367         qemu_log_mask(LOG_GUEST_ERROR, "zynq_slcr: Invalid write access to "
 368                       "addr %" HWADDR_PRIx "\n", offset * 4);
 369         return;
 370     }
 371
 372     switch (offset) {
 373     case SCL:
 374         s->regs[SCL] = val & 0x1;
 375         return;
 376     case LOCK:
 377         if ((val & 0xFFFF) == XILINX_LOCK_KEY) {
 378             DB_PRINT("XILINX LOCK 0xF8000000 + 0x%x <= 0x%x\n", (int)offset,
 379                 (unsigned)val & 0xFFFF);
 380             s->regs[LOCKSTA] = 1;
 381         } else {
 382             DB_PRINT("WRONG XILINX LOCK KEY 0xF8000000 + 0x%x <= 0x%x\n",
 383                 (int)offset, (unsigned)val & 0xFFFF);
 384         }
 385         return;
 386     case UNLOCK:
 387         if ((val & 0xFFFF) == XILINX_UNLOCK_KEY) {
 388             DB_PRINT("XILINX UNLOCK 0xF8000000 + 0x%x <= 0x%x\n", (int)offset,
 389                 (unsigned)val & 0xFFFF);
 390             s->regs[LOCKSTA] = 0;
 391         } else {
 392             DB_PRINT("WRONG XILINX UNLOCK KEY 0xF8000000 + 0x%x <= 0x%x\n",
 393                 (int)offset, (unsigned)val & 0xFFFF);
 394         }
 395         return;
 396     }
 397
 398     if (s->regs[LOCKSTA]) {
 399         qemu_log_mask(LOG_GUEST_ERROR,
 400                       "SCLR registers are locked. Unlock them first\n");
 401         return;
 402     }
 403     s->regs[offset] = val;
 404
 405     switch (offset) {
 406     case PSS_RST_CTRL:
 407         if (val & R_PSS_RST_CTRL_SOFT_RST) {
 408             qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 409         }
 410         break;
 411     }
 412 }
 413
 414 static const MemoryRegionOps slcr_ops = {
 415     .read = zynq_slcr_read,
 416     .write = zynq_slcr_write,
 417     .endianness = DEVICE_NATIVE_ENDIAN,
 418 };
 419
 420 static void zynq_slcr_init(Object *obj)
 421 {
 422     ZynqSLCRState *s = ZYNQ_SLCR(obj);
 423
 424     memory_region_init_io(&s->iomem, obj, &slcr_ops, s, "slcr",
 425                           ZYNQ_SLCR_MMIO_SIZE);
 426     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem);
 427 }
 428
 429 static const VMStateDescription vmstate_zynq_slcr = {
 430     .name = "zynq_slcr",
 431     .version_id = 2,
 432     .minimum_version_id = 2,
 433     .fields = (VMStateField[]) {
 434         VMSTATE_UINT32_ARRAY(regs, ZynqSLCRState, ZYNQ_SLCR_NUM_REGS),
 435         VMSTATE_END_OF_LIST()
 436     }
 437 };
 438
 439 static void zynq_slcr_class_init(ObjectClass *klass, void *data)
 440 {
 441     DeviceClass *dc = DEVICE_CLASS(klass);
 442
 443     dc->vmsd = &vmstate_zynq_slcr;
 444     dc->reset = zynq_slcr_reset;
 445 }
 446
 447 static const TypeInfo zynq_slcr_info = {
 448     .class_init = zynq_slcr_class_init,
 449     .name  = TYPE_ZYNQ_SLCR,
 450     .parent = TYPE_SYS_BUS_DEVICE,
 451     .instance_size  = sizeof(ZynqSLCRState),
 452     .instance_init = zynq_slcr_init,
 453 };
 454
 455 static void zynq_slcr_register_types(void)
 456 {
 457     type_register_static(&zynq_slcr_info);
 458 }
 459
 460 type_init(zynq_slcr_register_types)