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