board/gateworks/gw_ventana/gw_ventana_spl.c

   1 /*
   2  * Copyright (C) 2014 Gateworks Corporation
   3  * Author: Tim Harvey <tharvey@gateworks.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/crm_regs.h>
  11 #include <asm/arch/mx6-ddr.h>
  12 #include <asm/arch/mx6-pins.h>
  13 #include <asm/arch/sys_proto.h>
  14 #include <asm/imx-common/boot_mode.h>
  15 #include <asm/imx-common/iomux-v3.h>
  16 #include <asm/imx-common/mxc_i2c.h>
  17 #include <environment.h>
  18 #include <i2c.h>
  19 #include <spl.h>
  20
  21 #include "gsc.h"
  22 #include "common.h"
  23
  24 DECLARE_GLOBAL_DATA_PTR;
  25
  26 #define RTT_NOM_120OHM /* use 120ohm Rtt_nom vs 60ohm (lower power) */
  27 #define GSC_EEPROM_DDR_SIZE     0x2B    /* enum (512,1024,2048) MB */
  28 #define GSC_EEPROM_DDR_WIDTH    0x2D    /* enum (32,64) bit */
  29
  30 /* configure MX6Q/DUAL mmdc DDR io registers */
  31 struct mx6dq_iomux_ddr_regs mx6dq_ddr_ioregs = {
  32         /* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
  33         .dram_sdclk_0 = 0x00020030,
  34         .dram_sdclk_1 = 0x00020030,
  35         .dram_cas = 0x00020030,
  36         .dram_ras = 0x00020030,
  37         .dram_reset = 0x00020030,
  38         /* SDCKE[0:1]: 100k pull-up */
  39         .dram_sdcke0 = 0x00003000,
  40         .dram_sdcke1 = 0x00003000,
  41         /* SDBA2: pull-up disabled */
  42         .dram_sdba2 = 0x00000000,
  43         /* SDODT[0:1]: 100k pull-up, 40 ohm */
  44         .dram_sdodt0 = 0x00003030,
  45         .dram_sdodt1 = 0x00003030,
  46         /* SDQS[0:7]: Differential input, 40 ohm */
  47         .dram_sdqs0 = 0x00000030,
  48         .dram_sdqs1 = 0x00000030,
  49         .dram_sdqs2 = 0x00000030,
  50         .dram_sdqs3 = 0x00000030,
  51         .dram_sdqs4 = 0x00000030,
  52         .dram_sdqs5 = 0x00000030,
  53         .dram_sdqs6 = 0x00000030,
  54         .dram_sdqs7 = 0x00000030,
  55
  56         /* DQM[0:7]: Differential input, 40 ohm */
  57         .dram_dqm0 = 0x00020030,
  58         .dram_dqm1 = 0x00020030,
  59         .dram_dqm2 = 0x00020030,
  60         .dram_dqm3 = 0x00020030,
  61         .dram_dqm4 = 0x00020030,
  62         .dram_dqm5 = 0x00020030,
  63         .dram_dqm6 = 0x00020030,
  64         .dram_dqm7 = 0x00020030,
  65 };
  66
  67 /* configure MX6Q/DUAL mmdc GRP io registers */
  68 struct mx6dq_iomux_grp_regs mx6dq_grp_ioregs = {
  69         /* DDR3 */
  70         .grp_ddr_type = 0x000c0000,
  71         .grp_ddrmode_ctl = 0x00020000,
  72         /* disable DDR pullups */
  73         .grp_ddrpke = 0x00000000,
  74         /* ADDR[00:16], SDBA[0:1]: 40 ohm */
  75         .grp_addds = 0x00000030,
  76         /* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
  77         .grp_ctlds = 0x00000030,
  78         /* DATA[00:63]: Differential input, 40 ohm */
  79         .grp_ddrmode = 0x00020000,
  80         .grp_b0ds = 0x00000030,
  81         .grp_b1ds = 0x00000030,
  82         .grp_b2ds = 0x00000030,
  83         .grp_b3ds = 0x00000030,
  84         .grp_b4ds = 0x00000030,
  85         .grp_b5ds = 0x00000030,
  86         .grp_b6ds = 0x00000030,
  87         .grp_b7ds = 0x00000030,
  88 };
  89
  90 /* configure MX6SOLO/DUALLITE mmdc DDR io registers */
  91 struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
  92         /* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
  93         .dram_sdclk_0 = 0x00020030,
  94         .dram_sdclk_1 = 0x00020030,
  95         .dram_cas = 0x00020030,
  96         .dram_ras = 0x00020030,
  97         .dram_reset = 0x00020030,
  98         /* SDCKE[0:1]: 100k pull-up */
  99         .dram_sdcke0 = 0x00003000,
 100         .dram_sdcke1 = 0x00003000,
 101         /* SDBA2: pull-up disabled */
 102         .dram_sdba2 = 0x00000000,
 103         /* SDODT[0:1]: 100k pull-up, 40 ohm */
 104         .dram_sdodt0 = 0x00003030,
 105         .dram_sdodt1 = 0x00003030,
 106         /* SDQS[0:7]: Differential input, 40 ohm */
 107         .dram_sdqs0 = 0x00000030,
 108         .dram_sdqs1 = 0x00000030,
 109         .dram_sdqs2 = 0x00000030,
 110         .dram_sdqs3 = 0x00000030,
 111         .dram_sdqs4 = 0x00000030,
 112         .dram_sdqs5 = 0x00000030,
 113         .dram_sdqs6 = 0x00000030,
 114         .dram_sdqs7 = 0x00000030,
 115
 116         /* DQM[0:7]: Differential input, 40 ohm */
 117         .dram_dqm0 = 0x00020030,
 118         .dram_dqm1 = 0x00020030,
 119         .dram_dqm2 = 0x00020030,
 120         .dram_dqm3 = 0x00020030,
 121         .dram_dqm4 = 0x00020030,
 122         .dram_dqm5 = 0x00020030,
 123         .dram_dqm6 = 0x00020030,
 124         .dram_dqm7 = 0x00020030,
 125 };
 126
 127 /* configure MX6SOLO/DUALLITE mmdc GRP io registers */
 128 struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
 129         /* DDR3 */
 130         .grp_ddr_type = 0x000c0000,
 131         /* SDQS[0:7]: Differential input, 40 ohm */
 132         .grp_ddrmode_ctl = 0x00020000,
 133         /* disable DDR pullups */
 134         .grp_ddrpke = 0x00000000,
 135         /* ADDR[00:16], SDBA[0:1]: 40 ohm */
 136         .grp_addds = 0x00000030,
 137         /* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
 138         .grp_ctlds = 0x00000030,
 139         /* DATA[00:63]: Differential input, 40 ohm */
 140         .grp_ddrmode = 0x00020000,
 141         .grp_b0ds = 0x00000030,
 142         .grp_b1ds = 0x00000030,
 143         .grp_b2ds = 0x00000030,
 144         .grp_b3ds = 0x00000030,
 145         .grp_b4ds = 0x00000030,
 146         .grp_b5ds = 0x00000030,
 147         .grp_b6ds = 0x00000030,
 148         .grp_b7ds = 0x00000030,
 149 };
 150
 151 /* MT41K64M16JT-125 (1Gb density) */
 152 static struct mx6_ddr3_cfg mt41k64m16jt_125 = {
 153         .mem_speed = 1600,
 154         .density = 1,
 155         .width = 16,
 156         .banks = 8,
 157         .rowaddr = 13,
 158         .coladdr = 10,
 159         .pagesz = 2,
 160         .trcd = 1375,
 161         .trcmin = 4875,
 162         .trasmin = 3500,
 163 };
 164
 165 /* MT41K128M16JT-125 (2Gb density) */
 166 static struct mx6_ddr3_cfg mt41k128m16jt_125 = {
 167         .mem_speed = 1600,
 168         .density = 2,
 169         .width = 16,
 170         .banks = 8,
 171         .rowaddr = 14,
 172         .coladdr = 10,
 173         .pagesz = 2,
 174         .trcd = 1375,
 175         .trcmin = 4875,
 176         .trasmin = 3500,
 177 };
 178
 179 /* MT41K256M16HA-125 (4Gb density) */
 180 static struct mx6_ddr3_cfg mt41k256m16ha_125 = {
 181         .mem_speed = 1600,
 182         .density = 4,
 183         .width = 16,
 184         .banks = 8,
 185         .rowaddr = 15,
 186         .coladdr = 10,
 187         .pagesz = 2,
 188         .trcd = 1375,
 189         .trcmin = 4875,
 190         .trasmin = 3500,
 191 };
 192
 193 /*
 194  * calibration - these are the various CPU/DDR3 combinations we support
 195  */
 196 static struct mx6_mmdc_calibration mx6sdl_64x16_mmdc_calib = {
 197         /* write leveling calibration determine */
 198         .p0_mpwldectrl0 = 0x004C004E,
 199         .p0_mpwldectrl1 = 0x00440044,
 200         /* Read DQS Gating calibration */
 201         .p0_mpdgctrl0 = 0x42440247,
 202         .p0_mpdgctrl1 = 0x02310232,
 203         /* Read Calibration: DQS delay relative to DQ read access */
 204         .p0_mprddlctl = 0x45424746,
 205         /* Write Calibration: DQ/DM delay relative to DQS write access */
 206         .p0_mpwrdlctl = 0x33382C31,
 207 };
 208
 209 static struct mx6_mmdc_calibration mx6dq_256x16_mmdc_calib = {
 210         /* write leveling calibration determine */
 211         .p0_mpwldectrl0 = 0x001B0016,
 212         .p0_mpwldectrl1 = 0x000C000E,
 213         /* Read DQS Gating calibration */
 214         .p0_mpdgctrl0 = 0x4324033A,
 215         .p0_mpdgctrl1 = 0x00000000,
 216         /* Read Calibration: DQS delay relative to DQ read access */
 217         .p0_mprddlctl = 0x40403438,
 218         /* Write Calibration: DQ/DM delay relative to DQS write access */
 219         .p0_mpwrdlctl = 0x40403D36,
 220 };
 221
 222 static struct mx6_mmdc_calibration mx6sdl_256x16_mmdc_calib = {
 223         /* write leveling calibration determine */
 224         .p0_mpwldectrl0 = 0x00420043,
 225         .p0_mpwldectrl1 = 0x0016001A,
 226         /* Read DQS Gating calibration */
 227         .p0_mpdgctrl0 = 0x4238023B,
 228         .p0_mpdgctrl1 = 0x00000000,
 229         /* Read Calibration: DQS delay relative to DQ read access */
 230         .p0_mprddlctl = 0x40404849,
 231         /* Write Calibration: DQ/DM delay relative to DQS write access */
 232         .p0_mpwrdlctl = 0x40402E2F,
 233 };
 234
 235 static struct mx6_mmdc_calibration mx6dq_128x32_mmdc_calib = {
 236         /* write leveling calibration determine */
 237         .p0_mpwldectrl0 = 0x00190017,
 238         .p0_mpwldectrl1 = 0x00140026,
 239         /* Read DQS Gating calibration */
 240         .p0_mpdgctrl0 = 0x43380347,
 241         .p0_mpdgctrl1 = 0x433C034D,
 242         /* Read Calibration: DQS delay relative to DQ read access */
 243         .p0_mprddlctl = 0x3C313539,
 244         /* Write Calibration: DQ/DM delay relative to DQS write access */
 245         .p0_mpwrdlctl = 0x36393C39,
 246 };
 247
 248 static struct mx6_mmdc_calibration mx6sdl_128x32_mmdc_calib = {
 249         /* write leveling calibration determine */
 250         .p0_mpwldectrl0 = 0x003C003C,
 251         .p0_mpwldectrl1 = 0x001F002A,
 252         /* Read DQS Gating calibration */
 253         .p0_mpdgctrl0 = 0x42410244,
 254         .p0_mpdgctrl1 = 0x4234023A,
 255         /* Read Calibration: DQS delay relative to DQ read access */
 256         .p0_mprddlctl = 0x484A4C4B,
 257         /* Write Calibration: DQ/DM delay relative to DQS write access */
 258         .p0_mpwrdlctl = 0x33342B32,
 259 };
 260
 261 static struct mx6_mmdc_calibration mx6dq_128x64_mmdc_calib = {
 262         /* write leveling calibration determine */
 263         .p0_mpwldectrl0 = 0x00190017,
 264         .p0_mpwldectrl1 = 0x00140026,
 265         .p1_mpwldectrl0 = 0x0021001C,
 266         .p1_mpwldectrl1 = 0x0011001D,
 267         /* Read DQS Gating calibration */
 268         .p0_mpdgctrl0 = 0x43380347,
 269         .p0_mpdgctrl1 = 0x433C034D,
 270         .p1_mpdgctrl0 = 0x032C0324,
 271         .p1_mpdgctrl1 = 0x03310232,
 272         /* Read Calibration: DQS delay relative to DQ read access */
 273         .p0_mprddlctl = 0x3C313539,
 274         .p1_mprddlctl = 0x37343141,
 275         /* Write Calibration: DQ/DM delay relative to DQS write access */
 276         .p0_mpwrdlctl = 0x36393C39,
 277         .p1_mpwrdlctl = 0x42344438,
 278 };
 279
 280 static struct mx6_mmdc_calibration mx6sdl_128x64_mmdc_calib = {
 281         /* write leveling calibration determine */
 282         .p0_mpwldectrl0 = 0x003C003C,
 283         .p0_mpwldectrl1 = 0x001F002A,
 284         .p1_mpwldectrl0 = 0x00330038,
 285         .p1_mpwldectrl1 = 0x0022003F,
 286         /* Read DQS Gating calibration */
 287         .p0_mpdgctrl0 = 0x42410244,
 288         .p0_mpdgctrl1 = 0x4234023A,
 289         .p1_mpdgctrl0 = 0x022D022D,
 290         .p1_mpdgctrl1 = 0x021C0228,
 291         /* Read Calibration: DQS delay relative to DQ read access */
 292         .p0_mprddlctl = 0x484A4C4B,
 293         .p1_mprddlctl = 0x4B4D4E4B,
 294         /* Write Calibration: DQ/DM delay relative to DQS write access */
 295         .p0_mpwrdlctl = 0x33342B32,
 296         .p1_mpwrdlctl = 0x3933332B,
 297 };
 298
 299 static struct mx6_mmdc_calibration mx6dq_256x32_mmdc_calib = {
 300         /* write leveling calibration determine */
 301         .p0_mpwldectrl0 = 0x001E001A,
 302         .p0_mpwldectrl1 = 0x0026001F,
 303         /* Read DQS Gating calibration */
 304         .p0_mpdgctrl0 = 0x43370349,
 305         .p0_mpdgctrl1 = 0x032D0327,
 306         /* Read Calibration: DQS delay relative to DQ read access */
 307         .p0_mprddlctl = 0x3D303639,
 308         /* Write Calibration: DQ/DM delay relative to DQS write access */
 309         .p0_mpwrdlctl = 0x32363934,
 310 };
 311
 312 static struct mx6_mmdc_calibration mx6sdl_256x32_mmdc_calib = {
 313         /* write leveling calibration determine */
 314         .p0_mpwldectrl0 = 0X00480047,
 315         .p0_mpwldectrl1 = 0X003D003F,
 316         /* Read DQS Gating calibration */
 317         .p0_mpdgctrl0 = 0X423E0241,
 318         .p0_mpdgctrl1 = 0X022B022C,
 319         /* Read Calibration: DQS delay relative to DQ read access */
 320         .p0_mprddlctl = 0X49454A4A,
 321         /* Write Calibration: DQ/DM delay relative to DQS write access */
 322         .p0_mpwrdlctl = 0X2E372C32,
 323 };
 324
 325 static struct mx6_mmdc_calibration mx6dq_256x64_mmdc_calib = {
 326         /* write leveling calibration determine */
 327         .p0_mpwldectrl0 = 0X00220021,
 328         .p0_mpwldectrl1 = 0X00200030,
 329         .p1_mpwldectrl0 = 0X002D0027,
 330         .p1_mpwldectrl1 = 0X00150026,
 331         /* Read DQS Gating calibration */
 332         .p0_mpdgctrl0 = 0x43330342,
 333         .p0_mpdgctrl1 = 0x0339034A,
 334         .p1_mpdgctrl0 = 0x032F0325,
 335         .p1_mpdgctrl1 = 0x032F022E,
 336         /* Read Calibration: DQS delay relative to DQ read access */
 337         .p0_mprddlctl = 0X3A2E3437,
 338         .p1_mprddlctl = 0X35312F3F,
 339         /* Write Calibration: DQ/DM delay relative to DQS write access */
 340         .p0_mpwrdlctl = 0X33363B37,
 341         .p1_mpwrdlctl = 0X40304239,
 342 };
 343
 344 static void spl_dram_init(int width, int size_mb, int board_model)
 345 {
 346         struct mx6_ddr3_cfg *mem = NULL;
 347         struct mx6_mmdc_calibration *calib = NULL;
 348         struct mx6_ddr_sysinfo sysinfo = {
 349                 /* width of data bus:0=16,1=32,2=64 */
 350                 .dsize = width/32,
 351                 /* config for full 4GB range so that get_mem_size() works */
 352                 .cs_density = 32, /* 32Gb per CS */
 353                 /* single chip select */
 354                 .ncs = 1,
 355                 .cs1_mirror = 0,
 356                 .rtt_wr = 1 /*DDR3_RTT_60_OHM*/,        /* RTT_Wr = RZQ/4 */
 357 #ifdef RTT_NOM_120OHM
 358                 .rtt_nom = 2 /*DDR3_RTT_120_OHM*/,      /* RTT_Nom = RZQ/2 */
 359 #else
 360                 .rtt_nom = 1 /*DDR3_RTT_60_OHM*/,       /* RTT_Nom = RZQ/4 */
 361 #endif
 362                 .walat = 1,     /* Write additional latency */
 363                 .ralat = 5,     /* Read additional latency */
 364                 .mif3_mode = 3, /* Command prediction working mode */
 365                 .bi_on = 1,     /* Bank interleaving enabled */
 366                 .sde_to_rst = 0x10,     /* 14 cycles, 200us (JEDEC default) */
 367                 .rst_to_cke = 0x23,     /* 33 cycles, 500us (JEDEC default) */
 368                 .pd_fast_exit = 1, /* enable precharge power-down fast exit */
 369                 .ddr_type = DDR_TYPE_DDR3,
 370         };
 371
 372         /*
 373          * MMDC Calibration requires the following data:
 374          *   mx6_mmdc_calibration - board-specific calibration (routing delays)
 375          *      these calibration values depend on board routing, SoC, and DDR
 376          *   mx6_ddr_sysinfo - board-specific memory architecture (width/cs/etc)
 377          *   mx6_ddr_cfg - chip specific timing/layout details
 378          */
 379         if (width == 16 && size_mb == 128) {
 380                 mem = &mt41k64m16jt_125;
 381                 if (is_cpu_type(MXC_CPU_MX6Q))
 382                         ;
 383                 else
 384                         calib = &mx6sdl_64x16_mmdc_calib;
 385                 debug("1gB density\n");
 386         } else if (width == 16 && size_mb == 256) {
 387                 /* 1x 2Gb density chip - same calib as 2x 2Gb */
 388                 mem = &mt41k128m16jt_125;
 389                 if (is_cpu_type(MXC_CPU_MX6Q))
 390                         calib = &mx6dq_128x32_mmdc_calib;
 391                 else
 392                         calib = &mx6sdl_128x32_mmdc_calib;
 393                 debug("2gB density\n");
 394         } else if (width == 16 && size_mb == 512) {
 395                 mem = &mt41k256m16ha_125;
 396                 if (is_cpu_type(MXC_CPU_MX6Q))
 397                         calib = &mx6dq_256x16_mmdc_calib;
 398                 else
 399                         calib = &mx6sdl_256x16_mmdc_calib;
 400                 debug("4gB density\n");
 401         } else if (width == 32 && size_mb == 256) {
 402                 /* Same calib as width==16, size==128 */
 403                 mem = &mt41k64m16jt_125;
 404                 if (is_cpu_type(MXC_CPU_MX6Q))
 405                         ;
 406                 else
 407                         calib = &mx6sdl_64x16_mmdc_calib;
 408                 debug("1gB density\n");
 409         } else if (width == 32 && size_mb == 512) {
 410                 mem = &mt41k128m16jt_125;
 411                 if (is_cpu_type(MXC_CPU_MX6Q))
 412                         calib = &mx6dq_128x32_mmdc_calib;
 413                 else
 414                         calib = &mx6sdl_128x32_mmdc_calib;
 415                 debug("2gB density\n");
 416         }  else if (width == 32 && size_mb == 1024) {
 417                 mem = &mt41k256m16ha_125;
 418                 if (is_cpu_type(MXC_CPU_MX6Q))
 419                         calib = &mx6dq_256x32_mmdc_calib;
 420                 else
 421                         calib = &mx6sdl_256x32_mmdc_calib;
 422                 debug("4gB density\n");
 423         } else if (width == 64 && size_mb == 512) {
 424                 mem = &mt41k64m16jt_125;
 425                 debug("1gB density\n");
 426         } else if (width == 64 && size_mb == 1024) {
 427                 mem = &mt41k128m16jt_125;
 428                 if (is_cpu_type(MXC_CPU_MX6Q))
 429                         calib = &mx6dq_128x64_mmdc_calib;
 430                 else
 431                         calib = &mx6sdl_128x64_mmdc_calib;
 432                 debug("2gB density\n");
 433         } else if (width == 64 && size_mb == 2048) {
 434                 mem = &mt41k256m16ha_125;
 435                 if (is_cpu_type(MXC_CPU_MX6Q))
 436                         calib = &mx6dq_256x64_mmdc_calib;
 437                 debug("4gB density\n");
 438         }
 439
 440         if (!(mem && calib)) {
 441                 puts("Error: Invalid Calibration/Board Configuration\n");
 442                 printf("MEM    : %s\n", mem ? "OKAY" : "NULL");
 443                 printf("CALIB  : %s\n", calib ? "OKAY" : "NULL");
 444                 printf("CPUTYPE: %s\n",
 445                        is_cpu_type(MXC_CPU_MX6Q) ? "IMX6Q" : "IMX6DL");
 446                 printf("SIZE_MB: %d\n", size_mb);
 447                 printf("WIDTH  : %d\n", width);
 448                 hang();
 449         }
 450
 451         if (is_cpu_type(MXC_CPU_MX6Q))
 452                 mx6dq_dram_iocfg(width, &mx6dq_ddr_ioregs,
 453                                  &mx6dq_grp_ioregs);
 454         else
 455                 mx6sdl_dram_iocfg(width, &mx6sdl_ddr_ioregs,
 456                                   &mx6sdl_grp_ioregs);
 457         mx6_dram_cfg(&sysinfo, calib, mem);
 458 }
 459
 460 static void ccgr_init(void)
 461 {
 462         struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
 463
 464         writel(0x00C03F3F, &ccm->CCGR0);
 465         writel(0x0030FC03, &ccm->CCGR1);
 466         writel(0x0FFFC000, &ccm->CCGR2);
 467         writel(0x3FF00000, &ccm->CCGR3);
 468         writel(0xFFFFF300, &ccm->CCGR4);        /* enable NAND/GPMI/BCH clks */
 469         writel(0x0F0000C3, &ccm->CCGR5);
 470         writel(0x000003FF, &ccm->CCGR6);
 471 }
 472
 473 static void gpr_init(void)
 474 {
 475         struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
 476
 477         /* enable AXI cache for VDOA/VPU/IPU */
 478         writel(0xF00000CF, &iomux->gpr[4]);
 479         /* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
 480         writel(0x007F007F, &iomux->gpr[6]);
 481         writel(0x007F007F, &iomux->gpr[7]);
 482 }
 483
 484 /*
 485  * called from C runtime startup code (arch/arm/lib/crt0.S:_main)
 486  * - we have a stack and a place to store GD, both in SRAM
 487  * - no variable global data is available
 488  */
 489 void board_init_f(ulong dummy)
 490 {
 491         struct ventana_board_info ventana_info;
 492         int board_model;
 493
 494         /* setup clock gating */
 495         ccgr_init();
 496
 497         /* setup AIPS and disable watchdog */
 498         arch_cpu_init();
 499
 500         /* setup AXI */
 501         gpr_init();
 502
 503         /* iomux and setup of i2c */
 504         setup_iomux_uart();
 505         setup_ventana_i2c();
 506
 507         /* setup GP timer */
 508         timer_init();
 509
 510         /* UART clocks enabled and gd valid - init serial console */
 511         preloader_console_init();
 512
 513         /* read/validate EEPROM info to determine board model and SDRAM cfg */
 514         board_model = read_eeprom(CONFIG_I2C_GSC, &ventana_info);
 515
 516         /* configure model-specific gpio */
 517         setup_iomux_gpio(board_model, &ventana_info);
 518
 519         /* provide some some default: 32bit 128MB */
 520         if (GW_UNKNOWN == board_model)
 521                 hang();
 522
 523         /* configure MMDC for SDRAM width/size and per-model calibration */
 524         spl_dram_init(8 << ventana_info.sdram_width,
 525                       16 << ventana_info.sdram_size,
 526                       board_model);
 527
 528         /* Clear the BSS. */
 529         memset(__bss_start, 0, __bss_end - __bss_start);
 530 }
 531
 532 /* called from board_init_r after gd setup if CONFIG_SPL_BOARD_INIT defined */
 533 /* its our chance to print info about boot device */
 534 void spl_board_init(void)
 535 {
 536         /* determine boot device from SRC_SBMR1 (BOOT_CFG[4:1]) or SRC_GPR9 */
 537         u32 boot_device = spl_boot_device();
 538
 539         switch (boot_device) {
 540         case BOOT_DEVICE_MMC1:
 541                 puts("Booting from MMC\n");
 542                 break;
 543         case BOOT_DEVICE_NAND:
 544                 puts("Booting from NAND\n");
 545                 break;
 546         case BOOT_DEVICE_SATA:
 547                 puts("Booting from SATA\n");
 548                 break;
 549         default:
 550                 puts("Unknown boot device\n");
 551         }
 552
 553         /* PMIC init */
 554         setup_pmic();
 555 }
 556
 557 #ifdef CONFIG_SPL_OS_BOOT
 558 /* return 1 if we wish to boot to uboot vs os (falcon mode) */
 559 int spl_start_uboot(void)
 560 {
 561         unsigned char ret = 1;
 562
 563         debug("%s\n", __func__);
 564 #ifdef CONFIG_SPL_ENV_SUPPORT
 565         env_init();
 566         env_relocate_spec();
 567         debug("boot_os=%s\n", getenv("boot_os"));
 568         if (getenv_yesno("boot_os") == 1)
 569                 ret = 0;
 570 #else
 571         /* use i2c-0:0x50:0x00 for falcon boot mode (0=linux, else uboot) */
 572         i2c_set_bus_num(0);
 573         gsc_i2c_read(0x50, 0x0, 1, &ret, 1);
 574 #endif
 575         if (!ret)
 576                 gsc_boot_wd_disable();
 577
 578         debug("%s booting %s\n", __func__, ret ? "uboot" : "linux");
 579         return ret;
 580 }
 581 #endif