board/amcc/redwood/redwood.c

   1 /*
   2  * This is the main board level file for the Redwood AMCC board.
   3  *
   4  * (C) Copyright 2008
   5  * Feng Kan, Applied Micro Circuits Corp., fkan@amcc.com
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  *
  25  */
  26
  27 #include <common.h>
  28 #include "redwood.h"
  29 #include <ppc4xx.h>
  30 #include <asm/processor.h>
  31 #include <i2c.h>
  32 #include <asm/io.h>
  33
  34 int compare_to_true(char *str);
  35 char *remove_l_w_space(char *in_str);
  36 char *remove_t_w_space(char *in_str);
  37 int get_console_port(void);
  38
  39 static void early_init_EBC(void);
  40 static int bootdevice_selected(void);
  41 static void early_reinit_EBC(int);
  42 static void early_init_UIC(void);
  43
  44 /*
  45  * Define Boot devices
  46  */
  47 #define BOOT_FROM_8BIT_SRAM                     0x00
  48 #define BOOT_FROM_16BIT_SRAM                    0x01
  49 #define BOOT_FROM_32BIT_SRAM                    0x02
  50 #define BOOT_FROM_8BIT_NAND                     0x03
  51 #define BOOT_FROM_16BIT_NOR                     0x04
  52 #define BOOT_DEVICE_UNKNOWN                     0xff
  53
  54 /*
  55  * EBC Devices Characteristics
  56  *   Peripheral Bank Access Parameters       -   EBC_BxAP
  57  *   Peripheral Bank Configuration Register  -   EBC_BxCR
  58  */
  59
  60 /*
  61  * 8 bit width SRAM
  62  * BU Value
  63  * BxAP : 0x03800000  - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
  64  * B0CR : 0xff098000  - BAS = ff0 - 100 11 00 0000000000000
  65  * B2CR : 0xe7098000  - BAS = e70 - 100 11 00 0000000000000
  66  */
  67 #define EBC_BXAP_8BIT_SRAM                                      \
  68         EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(7)  |     \
  69         EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |     \
  70         EBC_BXAP_CSN_ENCODE(0)  | EBC_BXAP_OEN_ENCODE(0)  |     \
  71         EBC_BXAP_WBN_ENCODE(0)  | EBC_BXAP_WBF_ENCODE(0)  |     \
  72         EBC_BXAP_TH_ENCODE(0)   | EBC_BXAP_RE_DISABLED    |     \
  73         EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_WRITEONLY  |     \
  74         EBC_BXAP_PEN_DISABLED
  75
  76 #define EBC_BXAP_16BIT_SRAM     EBC_BXAP_8BIT_SRAM
  77 #define EBC_BXAP_32BIT_SRAM     EBC_BXAP_8BIT_SRAM
  78
  79 /*
  80  * NAND flash
  81  * BU Value
  82  * BxAP : 0x048ff240  - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
  83  * B0CR : 0xff09a000  - BAS = ff0 - 100 11 01 0000000000000
  84  * B2CR : 0xe709a000  - BAS = e70 - 100 11 01 0000000000000
  85 */
  86 #define EBC_BXAP_NAND                                           \
  87         EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(7)  |     \
  88         EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |     \
  89         EBC_BXAP_CSN_ENCODE(0)  | EBC_BXAP_OEN_ENCODE(0)  |     \
  90         EBC_BXAP_WBN_ENCODE(0)  | EBC_BXAP_WBF_ENCODE(0)  |     \
  91         EBC_BXAP_TH_ENCODE(0)   | EBC_BXAP_RE_DISABLED    |     \
  92         EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_WRITEONLY  |     \
  93         EBC_BXAP_PEN_DISABLED
  94
  95 /*
  96  * NOR flash
  97  * BU Value
  98  * BxAP : 0x048ff240  - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
  99  * B0CR : 0xff09a000  - BAS = ff0 - 100 11 01 0000000000000
 100  * B2CR : 0xe709a000  - BAS = e70 - 100 11 01 0000000000000
 101 */
 102 #define EBC_BXAP_NOR                                            \
 103         EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(7)  |     \
 104         EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |     \
 105         EBC_BXAP_CSN_ENCODE(0)  | EBC_BXAP_OEN_ENCODE(0)  |     \
 106         EBC_BXAP_WBN_ENCODE(0)  | EBC_BXAP_WBF_ENCODE(0)  |     \
 107         EBC_BXAP_TH_ENCODE(0)   | EBC_BXAP_RE_DISABLED    |     \
 108         EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_WRITEONLY  |     \
 109         EBC_BXAP_PEN_DISABLED
 110
 111 /*
 112  * FPGA
 113  * BU value :
 114  * B1AP = 0x05895240  - 0 00001011 0 00 10 01 01 01 001 0 0 1 0 00000
 115  * B1CR = 0xe201a000  - BAS = e20 - 000 11 01 00000000000000
 116  */
 117 #define EBC_BXAP_FPGA                                           \
 118         EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(11) |     \
 119         EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |     \
 120         EBC_BXAP_CSN_ENCODE(10) | EBC_BXAP_OEN_ENCODE(1)  |     \
 121         EBC_BXAP_WBN_ENCODE(1)  | EBC_BXAP_WBF_ENCODE(1)  |     \
 122         EBC_BXAP_TH_ENCODE(1)   | EBC_BXAP_RE_DISABLED    |     \
 123         EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_RW         |     \
 124         EBC_BXAP_PEN_DISABLED
 125
 126 #define EBC_BXCR_8BIT_SRAM_CS0                                          \
 127         EBC_BXCR_BAS_ENCODE(0xFFE00000) | EBC_BXCR_BS_1MB           |   \
 128         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
 129
 130 #define EBC_BXCR_32BIT_SRAM_CS0                                         \
 131         EBC_BXCR_BAS_ENCODE(0xFFC00000) | EBC_BXCR_BS_1MB           |   \
 132         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_32BIT
 133
 134 #define EBC_BXCR_NAND_CS0                                               \
 135         EBC_BXCR_BAS_ENCODE(0xFF000000) | EBC_BXCR_BS_16MB          |   \
 136         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
 137
 138 #define EBC_BXCR_16BIT_SRAM_CS0                                         \
 139         EBC_BXCR_BAS_ENCODE(0xFFE00000) | EBC_BXCR_BS_2MB           |   \
 140         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
 141
 142 #define EBC_BXCR_NOR_CS0                                                \
 143         EBC_BXCR_BAS_ENCODE(0xFF000000) | EBC_BXCR_BS_16MB          |   \
 144         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
 145
 146 #define EBC_BXCR_NOR_CS1                                                \
 147         EBC_BXCR_BAS_ENCODE(0xE0000000) | EBC_BXCR_BS_128MB         |   \
 148         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
 149
 150 #define EBC_BXCR_NAND_CS1                                               \
 151         EBC_BXCR_BAS_ENCODE(0xE0000000) | EBC_BXCR_BS_128MB         |   \
 152         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
 153
 154 #define EBC_BXCR_NAND_CS2                                               \
 155         EBC_BXCR_BAS_ENCODE(0xC0000000) | EBC_BXCR_BS_128MB         |   \
 156         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
 157
 158 #define EBC_BXCR_SRAM_CS2                                               \
 159         EBC_BXCR_BAS_ENCODE(0xC0000000) | EBC_BXCR_BS_4MB           |   \
 160         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_32BIT
 161
 162 #define EBC_BXCR_LARGE_FLASH_CS2                                        \
 163         EBC_BXCR_BAS_ENCODE(0xE7000000) | EBC_BXCR_BS_16MB          |   \
 164         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
 165
 166 #define EBC_BXCR_FPGA_CS3                                               \
 167         EBC_BXCR_BAS_ENCODE(0xE2000000) | EBC_BXCR_BS_1MB           |   \
 168         EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
 169
 170 /*****************************************************************************
 171  * UBOOT initiated board specific function calls
 172  ****************************************************************************/
 173
 174 int board_early_init_f(void)
 175 {
 176         int computed_boot_device = BOOT_DEVICE_UNKNOWN;
 177
 178         /*
 179          * Initialise EBC
 180          */
 181         early_init_EBC();
 182
 183         /*
 184          * Determine which boot device was selected
 185          */
 186         computed_boot_device = bootdevice_selected();
 187
 188         /*
 189          * Reinit EBC based on selected boot device
 190          */
 191         early_reinit_EBC(computed_boot_device);
 192
 193         /*
 194          * Setup for UIC on 460SX redwood board
 195          */
 196         early_init_UIC();
 197
 198         return 0;
 199 }
 200
 201 int checkboard(void)
 202 {
 203         char *s = getenv("serial#");
 204
 205         printf("Board: Redwood - AMCC 460SX Reference Board");
 206         if (s != NULL) {
 207                 puts(", serial# ");
 208                 puts(s);
 209         }
 210         putc('\n');
 211
 212         return 0;
 213 }
 214
 215 static void early_init_EBC(void)
 216 {
 217         /*
 218          * Initialize EBC CONFIG -
 219          * Keep the Default value, but the bit PDT which has to be set to 1 ?TBC
 220          * default value :
 221          *      0x07C00000 - 0 0 000 1 1 1 1 1 0000 0 00000 000000000000
 222          */
 223         mtebc(EBC0_CFG, EBC_CFG_LE_UNLOCK |
 224               EBC_CFG_PTD_ENABLE |
 225               EBC_CFG_RTC_16PERCLK |
 226               EBC_CFG_ATC_PREVIOUS |
 227               EBC_CFG_DTC_PREVIOUS |
 228               EBC_CFG_CTC_PREVIOUS |
 229               EBC_CFG_OEO_PREVIOUS |
 230               EBC_CFG_EMC_DEFAULT | EBC_CFG_PME_DISABLE | EBC_CFG_PR_16);
 231
 232         /*
 233          * PART 1 : Initialize EBC Bank 3
 234          * ==============================
 235          * Bank1 is always associated to the EPLD.
 236          * It has to be initialized prior to other banks settings computation
 237          * since some board registers values may be needed to determine the
 238          * boot type
 239          */
 240         mtebc(PB1AP, EBC_BXAP_FPGA);
 241         mtebc(PB1CR, EBC_BXCR_FPGA_CS3);
 242
 243 }
 244
 245 static int bootdevice_selected(void)
 246 {
 247         unsigned long sdr0_pinstp;
 248         unsigned long bootstrap_settings;
 249         int computed_boot_device = BOOT_DEVICE_UNKNOWN;
 250
 251         /*
 252          *  Determine which boot device was selected
 253          *  =================================================
 254          *
 255          *  Read Pin Strap Register in PPC460SX
 256          *  Result can either be :
 257          *   - Boot strap = boot from EBC 8bits     => Small Flash
 258          *   - Boot strap = boot from PCI
 259          *   - Boot strap = IIC
 260          *  In case of boot from IIC, read Serial Device Strap Register1
 261          *
 262          *  Result can either be :
 263          *   - Boot from EBC  - EBC Bus Width = 8bits    => Small Flash
 264          *   - Boot from EBC  - EBC Bus Width = 16bits   => Large Flash or SRAM
 265          *   - Boot from PCI
 266          */
 267
 268         /* Read Pin Strap Register in PPC460SX */
 269         mfsdr(SDR0_PINSTP, sdr0_pinstp);
 270         bootstrap_settings = sdr0_pinstp & SDR0_PSTRP0_BOOTSTRAP_MASK;
 271
 272         switch (bootstrap_settings) {
 273         case SDR0_PSTRP0_BOOTSTRAP_SETTINGS0:
 274                 /*
 275                  * Boot from SRAM, 8bit width
 276                  */
 277                 computed_boot_device = BOOT_FROM_8BIT_SRAM;
 278                 break;
 279         case SDR0_PSTRP0_BOOTSTRAP_SETTINGS1:
 280                 /*
 281                  * Boot from SRAM, 32bit width
 282                  */
 283                 computed_boot_device = BOOT_FROM_32BIT_SRAM;
 284                 break;
 285         case SDR0_PSTRP0_BOOTSTRAP_SETTINGS2:
 286                 /*
 287                  * Boot from NAND, 8bit width
 288                  */
 289                 computed_boot_device = BOOT_FROM_8BIT_NAND;
 290                 break;
 291         case SDR0_PSTRP0_BOOTSTRAP_SETTINGS4:
 292                 /*
 293                  * Boot from SRAM, 16bit width
 294                  * Boot setting in IIC EEPROM 0x50
 295                  */
 296                 computed_boot_device = BOOT_FROM_16BIT_SRAM;
 297                 break;
 298         case SDR0_PSTRP0_BOOTSTRAP_SETTINGS5:
 299                 /*
 300                  * Boot from NOR, 16bit width
 301                  * Boot setting in IIC EEPROM 0x54
 302                  */
 303                 computed_boot_device = BOOT_FROM_16BIT_NOR;
 304                 break;
 305         default:
 306                 /* should not be */
 307                 computed_boot_device = BOOT_DEVICE_UNKNOWN;
 308                 break;
 309         }
 310
 311         return computed_boot_device;
 312 }
 313
 314 static void early_reinit_EBC(int computed_boot_device)
 315 {
 316         /*
 317          *  Compute EBC settings depending on selected boot device
 318          *  ======================================================
 319          *
 320          * Resulting EBC init will be among following configurations :
 321          *
 322          *  - Boot from EBC 8bits => boot from Small Flash selected
 323          *            EBC-CS0     = Small Flash
 324          *            EBC-CS2     = Large Flash and SRAM
 325          *
 326          *  - Boot from EBC 16bits => boot from Large Flash or SRAM
 327          *            EBC-CS0     = Large Flash or SRAM
 328          *            EBC-CS2     = Small Flash
 329          *
 330          *  - Boot from PCI
 331          *            EBC-CS0     = not initialized to avoid address contention
 332          *            EBC-CS2     = same as boot from Small Flash selected
 333          */
 334
 335         unsigned long ebc0_cs0_bxap_value = 0, ebc0_cs0_bxcr_value = 0;
 336         unsigned long ebc0_cs1_bxap_value = 0, ebc0_cs1_bxcr_value = 0;
 337         unsigned long ebc0_cs2_bxap_value = 0, ebc0_cs2_bxcr_value = 0;
 338
 339         switch (computed_boot_device) {
 340                 /*-------------------------------------------------------------------*/
 341         case BOOT_FROM_8BIT_SRAM:
 342                 /*-------------------------------------------------------------------*/
 343                 ebc0_cs0_bxap_value = EBC_BXAP_8BIT_SRAM;
 344                 ebc0_cs0_bxcr_value = EBC_BXCR_8BIT_SRAM_CS0;
 345                 ebc0_cs1_bxap_value = EBC_BXAP_NOR;
 346                 ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
 347                 ebc0_cs2_bxap_value = EBC_BXAP_NAND;
 348                 ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
 349                 break;
 350
 351                 /*-------------------------------------------------------------------*/
 352         case BOOT_FROM_16BIT_SRAM:
 353                 /*-------------------------------------------------------------------*/
 354                 ebc0_cs0_bxap_value = EBC_BXAP_16BIT_SRAM;
 355                 ebc0_cs0_bxcr_value = EBC_BXCR_16BIT_SRAM_CS0;
 356                 ebc0_cs1_bxap_value = EBC_BXAP_NOR;
 357                 ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
 358                 ebc0_cs2_bxap_value = EBC_BXAP_NAND;
 359                 ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
 360                 break;
 361
 362                 /*-------------------------------------------------------------------*/
 363         case BOOT_FROM_32BIT_SRAM:
 364                 /*-------------------------------------------------------------------*/
 365                 ebc0_cs0_bxap_value = EBC_BXAP_32BIT_SRAM;
 366                 ebc0_cs0_bxcr_value = EBC_BXCR_32BIT_SRAM_CS0;
 367                 ebc0_cs1_bxap_value = EBC_BXAP_NOR;
 368                 ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
 369                 ebc0_cs2_bxap_value = EBC_BXAP_NAND;
 370                 ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
 371                 break;
 372
 373                 /*-------------------------------------------------------------------*/
 374         case BOOT_FROM_16BIT_NOR:
 375                 /*-------------------------------------------------------------------*/
 376                 ebc0_cs0_bxap_value = EBC_BXAP_NOR;
 377                 ebc0_cs0_bxcr_value = EBC_BXCR_NOR_CS0;
 378                 ebc0_cs1_bxap_value = EBC_BXAP_NAND;
 379                 ebc0_cs1_bxcr_value = EBC_BXCR_NAND_CS1;
 380                 ebc0_cs2_bxap_value = EBC_BXAP_32BIT_SRAM;
 381                 ebc0_cs2_bxcr_value = EBC_BXCR_SRAM_CS2;
 382                 break;
 383
 384                 /*-------------------------------------------------------------------*/
 385         case BOOT_FROM_8BIT_NAND:
 386                 /*-------------------------------------------------------------------*/
 387                 ebc0_cs0_bxap_value = EBC_BXAP_NAND;
 388                 ebc0_cs0_bxcr_value = EBC_BXCR_NAND_CS0;
 389                 ebc0_cs1_bxap_value = EBC_BXAP_NOR;
 390                 ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
 391                 ebc0_cs2_bxap_value = EBC_BXAP_32BIT_SRAM;
 392                 ebc0_cs2_bxcr_value = EBC_BXCR_SRAM_CS2;
 393                 break;
 394
 395                 /*-------------------------------------------------------------------*/
 396         default:
 397                 /*-------------------------------------------------------------------*/
 398                 /* BOOT_DEVICE_UNKNOWN */
 399                 break;
 400         }
 401
 402         mtebc(PB0AP, ebc0_cs0_bxap_value);
 403         mtebc(PB0CR, ebc0_cs0_bxcr_value);
 404         mtebc(PB1AP, ebc0_cs1_bxap_value);
 405         mtebc(PB1CR, ebc0_cs1_bxcr_value);
 406         mtebc(PB2AP, ebc0_cs2_bxap_value);
 407         mtebc(PB2CR, ebc0_cs2_bxcr_value);
 408 }
 409
 410 static void early_init_UIC(void)
 411 {
 412         /*
 413          * Initialise UIC registers.  Clear all interrupts.  Disable all
 414          * interrupts.
 415          * Set critical interrupt values.  Set interrupt polarities.  Set
 416          * interrupt trigger levels.  Make bit 0 High  priority.  Clear all
 417          * interrupts again.
 418          */
 419         mtdcr(UIC3SR, 0xffffffff);      /* Clear all interrupts */
 420         mtdcr(UIC3ER, 0x00000000);      /* disable all interrupts */
 421         mtdcr(UIC3CR, 0x00000000);      /* Set Critical / Non Critical
 422                                          * interrupts */
 423         mtdcr(UIC3PR, 0xffffffff);      /* Set Interrupt Polarities */
 424         mtdcr(UIC3TR, 0x001fffff);      /* Set Interrupt Trigger Levels */
 425         mtdcr(UIC3VR, 0x00000000);      /* int31 highest, base=0x000 */
 426         mtdcr(UIC3SR, 0xffffffff);      /* clear all  interrupts */
 427
 428         mtdcr(UIC2SR, 0xffffffff);      /* Clear all interrupts */
 429         mtdcr(UIC2ER, 0x00000000);      /* disable all interrupts */
 430         mtdcr(UIC2CR, 0x00000000);      /* Set Critical / Non Critical
 431                                          * interrupts */
 432         mtdcr(UIC2PR, 0xebebebff);      /* Set Interrupt Polarities */
 433         mtdcr(UIC2TR, 0x74747400);      /* Set Interrupt Trigger Levels */
 434         mtdcr(UIC2VR, 0x00000000);      /* int31 highest, base=0x000 */
 435         mtdcr(UIC2SR, 0xffffffff);      /* clear all interrupts */
 436
 437         mtdcr(UIC1SR, 0xffffffff);      /* Clear all interrupts */
 438         mtdcr(UIC1ER, 0x00000000);      /* disable all interrupts */
 439         mtdcr(UIC1CR, 0x00000000);      /* Set Critical / Non Critical
 440                                          * interrupts */
 441         mtdcr(UIC1PR, 0xffffffff);      /* Set Interrupt Polarities */
 442         mtdcr(UIC1TR, 0x001fc0ff);      /* Set Interrupt Trigger Levels */
 443         mtdcr(UIC1VR, 0x00000000);      /* int31 highest, base=0x000 */
 444         mtdcr(UIC1SR, 0xffffffff);      /* clear all interrupts */
 445
 446         mtdcr(UIC0SR, 0xffffffff);      /* Clear all interrupts */
 447         mtdcr(UIC0ER, 0x00000000);      /* disable all interrupts excepted
 448                                          * cascade to be checked */
 449         mtdcr(UIC0CR, 0x00104001);      /* Set Critical / Non Critical
 450                                          * interrupts */
 451         mtdcr(UIC0PR, 0xffffffff);      /* Set Interrupt Polarities */
 452         mtdcr(UIC0TR, 0x000f003c);      /* Set Interrupt Trigger Levels */
 453         mtdcr(UIC0VR, 0x00000000);      /* int31 highest, base=0x000 */
 454         mtdcr(UIC0SR, 0xffffffff);      /* clear all interrupts */
 455
 456 }