board/esd/plu405/plu405.c

   1 /*
   2  * (C) Copyright 2001-2003
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/processor.h>
  10 #include <asm/io.h>
  11 #include <command.h>
  12 #include <malloc.h>
  13 #include <sja1000.h>
  14
  15 #undef FPGA_DEBUG
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 extern void lxt971_no_sleep(void);
  20
  21 /* fpga configuration data - gzip compressed and generated by bin2c */
  22 const unsigned char fpgadata[] =
  23 {
  24 #include "fpgadata.c"
  25 };
  26
  27 /*
  28  * include common fpga code (for esd boards)
  29  */
  30 #include "../common/fpga.c"
  31
  32 /*
  33  * generate a short spike on the CAN tx line
  34  * to bring the couplers in sync
  35  */
  36 void init_coupler(u32 addr)
  37 {
  38         struct sja1000_basic_s *ctrl = (struct sja1000_basic_s *)addr;
  39
  40         /* reset */
  41         out_8(&ctrl->cr, CR_RR);
  42
  43         /* dominant */
  44         out_8(&ctrl->btr0, 0x00); /* btr setup is required */
  45         out_8(&ctrl->btr1, 0x14); /* we use 1Mbit/s */
  46         out_8(&ctrl->oc, OC_TP1 | OC_TN1 | OC_POL1 |
  47               OC_TP0 | OC_TN0 | OC_POL0 | OC_MODE1);
  48         out_8(&ctrl->cr, 0x00);
  49
  50         /* delay */
  51         in_8(&ctrl->cr);
  52         in_8(&ctrl->cr);
  53         in_8(&ctrl->cr);
  54         in_8(&ctrl->cr);
  55
  56         /* reset */
  57         out_8(&ctrl->cr, CR_RR);
  58 }
  59
  60 int board_early_init_f(void)
  61 {
  62         /*
  63          * IRQ 0-15  405GP internally generated; active high; level sensitive
  64          * IRQ 16    405GP internally generated; active low; level sensitive
  65          * IRQ 17-24 RESERVED
  66          * IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
  67          * IRQ 26 (EXT IRQ 1) SER0 ; active low; level sensitive
  68          * IRQ 27 (EXT IRQ 2) SER1; active low; level sensitive
  69          * IRQ 28 (EXT IRQ 3) FPGA 0; active low; level sensitive
  70          * IRQ 29 (EXT IRQ 4) FPGA 1; active low; level sensitive
  71          * IRQ 30 (EXT IRQ 5) PCI INTA; active low; level sensitive
  72          * IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
  73          */
  74         mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
  75         mtdcr(UIC0ER, 0x00000000);       /* disable all ints */
  76         mtdcr(UIC0CR, 0x00000000);       /* set all to be non-critical*/
  77         mtdcr(UIC0PR, 0xFFFFFF99);       /* set int polarities */
  78         mtdcr(UIC0TR, 0x10000000);       /* set int trigger levels */
  79         mtdcr(UIC0VCR, 0x00000001);      /* set vect base=0,INT0 highest prio */
  80         mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
  81
  82         /*
  83          * EBC Configuration Register: set ready timeout to
  84          * 512 ebc-clks -> ca. 15 us
  85          */
  86         mtebc(EBC0_CFG, 0xa8400000); /* ebc always driven */
  87
  88         return 0;
  89 }
  90
  91 int misc_init_r(void)
  92 {
  93         unsigned char *dst;
  94         unsigned char fctr;
  95         ulong len = sizeof(fpgadata);
  96         int status;
  97         int index;
  98         int i;
  99
 100         /* adjust flash start and offset */
 101         gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
 102         gd->bd->bi_flashoffset = 0;
 103
 104         dst = malloc(CONFIG_SYS_FPGA_MAX_SIZE);
 105         if (gunzip(dst, CONFIG_SYS_FPGA_MAX_SIZE,
 106                    (uchar *)fpgadata, &len) != 0) {
 107                 printf("GUNZIP ERROR - must RESET board to recover\n");
 108                 do_reset(NULL, 0, 0, NULL);
 109         }
 110
 111         status = fpga_boot(dst, len);
 112         if (status != 0) {
 113                 printf("\nFPGA: Booting failed ");
 114                 switch (status) {
 115                 case ERROR_FPGA_PRG_INIT_LOW:
 116                         printf("(Timeout: INIT not low "
 117                                "after asserting PROGRAM*)\n");
 118                         break;
 119                 case ERROR_FPGA_PRG_INIT_HIGH:
 120                         printf("(Timeout: INIT not high "
 121                                "after deasserting PROGRAM*)\n");
 122                         break;
 123                 case ERROR_FPGA_PRG_DONE:
 124                         printf("(Timeout: DONE not high "
 125                                "after programming FPGA)\n");
 126                         break;
 127                 }
 128
 129                 /* display infos on fpgaimage */
 130                 index = 15;
 131                 for (i=0; i<4; i++) {
 132                         len = dst[index];
 133                         printf("FPGA: %s\n", &(dst[index+1]));
 134                         index += len+3;
 135                 }
 136                 putc ('\n');
 137                 /* delayed reboot */
 138                 for (i=20; i>0; i--) {
 139                         printf("Rebooting in %2d seconds \r",i);
 140                         for (index=0;index<1000;index++)
 141                                 udelay(1000);
 142                 }
 143                 putc('\n');
 144                 do_reset(NULL, 0, 0, NULL);
 145         }
 146
 147         puts("FPGA:  ");
 148
 149         /* display infos on fpgaimage */
 150         index = 15;
 151         for (i=0; i<4; i++) {
 152                 len = dst[index];
 153                 printf("%s ", &(dst[index+1]));
 154                 index += len+3;
 155         }
 156         putc('\n');
 157
 158         free(dst);
 159
 160         /*
 161          * Reset FPGA via FPGA_DATA pin
 162          */
 163         SET_FPGA(FPGA_PRG | FPGA_CLK);
 164         udelay(1000); /* wait 1ms */
 165         SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);
 166         udelay(1000); /* wait 1ms */
 167
 168         /*
 169          * Reset external DUARTs
 170          */
 171         out_be32((void*)GPIO0_OR,
 172                  in_be32((void*)GPIO0_OR) | CONFIG_SYS_DUART_RST);
 173         udelay(10);
 174         out_be32((void*)GPIO0_OR,
 175                  in_be32((void*)GPIO0_OR) & ~CONFIG_SYS_DUART_RST);
 176         udelay(1000);
 177
 178         /*
 179          * Set NAND-FLASH GPIO signals to default
 180          */
 181         out_be32((void*)GPIO0_OR,
 182                  in_be32((void*)GPIO0_OR) &
 183                  ~(CONFIG_SYS_NAND_CLE | CONFIG_SYS_NAND_ALE));
 184         out_be32((void*)GPIO0_OR,
 185                  in_be32((void*)GPIO0_OR) | CONFIG_SYS_NAND_CE);
 186
 187         /*
 188          * Setup EEPROM write protection
 189          */
 190         out_be32((void*)GPIO0_OR,
 191                  in_be32((void*)GPIO0_OR) | CONFIG_SYS_EEPROM_WP);
 192         out_be32((void*)GPIO0_TCR,
 193                  in_be32((void*)GPIO0_TCR) | CONFIG_SYS_EEPROM_WP);
 194
 195         /*
 196          * Enable interrupts in exar duart mcr[3]
 197          */
 198         out_8((void *)DUART0_BA + 4, 0x08);
 199         out_8((void *)DUART1_BA + 4, 0x08);
 200
 201         /*
 202          * Enable auto RS485 mode in 2nd external uart
 203          */
 204         out_8((void *)DUART1_BA + 3, 0xbf); /* write LCR */
 205         fctr = in_8((void *)DUART1_BA + 1); /* read FCTR */
 206         fctr |= 0x08;                       /* enable RS485 mode */
 207         out_8((void *)DUART1_BA + 1, fctr); /* write FCTR */
 208         out_8((void *)DUART1_BA + 3, 0);    /* write LCR */
 209
 210         /*
 211          * Init magnetic couplers
 212          */
 213         if (!getenv("noinitcoupler")) {
 214                 init_coupler(CAN0_BA);
 215                 init_coupler(CAN1_BA);
 216         }
 217         return 0;
 218 }
 219
 220 /*
 221  * Check Board Identity:
 222  */
 223 int checkboard(void)
 224 {
 225         char str[64];
 226         int i = getenv_f("serial#", str, sizeof(str));
 227
 228         puts("Board: ");
 229
 230         if (i == -1)
 231                 puts("### No HW ID - assuming PLU405");
 232         else
 233                 puts(str);
 234
 235         putc('\n');
 236         return 0;
 237 }
 238
 239 #ifdef CONFIG_IDE_RESET
 240 #define FPGA_CTRL (CONFIG_SYS_FPGA_BASE_ADDR + CONFIG_SYS_FPGA_CTRL)
 241 void ide_set_reset(int on)
 242 {
 243         /*
 244          * Assert or deassert CompactFlash Reset Pin
 245          */
 246         if (on) {               /* assert RESET */
 247                 out_be16((void *)FPGA_CTRL,
 248                          in_be16((void *)FPGA_CTRL) &
 249                          ~CONFIG_SYS_FPGA_CTRL_CF_RESET);
 250         } else {                /* release RESET */
 251                 out_be16((void *)FPGA_CTRL,
 252                          in_be16((void *)FPGA_CTRL) |
 253                          CONFIG_SYS_FPGA_CTRL_CF_RESET);
 254         }
 255 }
 256 #endif /* CONFIG_IDE_RESET */
 257
 258 void reset_phy(void)
 259 {
 260 #ifdef CONFIG_LXT971_NO_SLEEP
 261
 262         /*
 263          * Disable sleep mode in LXT971
 264          */
 265         lxt971_no_sleep();
 266 #endif
 267 }
 268
 269 #if defined(CONFIG_SYS_EEPROM_WREN)
 270 /* Input: <dev_addr>  I2C address of EEPROM device to enable.
 271  *             <state> -1: deliver current state
 272  *                      0: disable write
 273  *                      1: enable write
 274  *  Returns:           -1: wrong device address
 275  *                      0: dis-/en- able done
 276  *                    0/1: current state if <state> was -1.
 277  */
 278 int eeprom_write_enable(unsigned dev_addr, int state)
 279 {
 280         if (CONFIG_SYS_I2C_EEPROM_ADDR != dev_addr) {
 281                 return -1;
 282         } else {
 283                 switch (state) {
 284                 case 1:
 285                         /* Enable write access, clear bit GPIO0. */
 286                         out_be32((void*)GPIO0_OR,
 287                                  in_be32((void*)GPIO0_OR) &
 288                                  ~CONFIG_SYS_EEPROM_WP);
 289                         state = 0;
 290                         break;
 291                 case 0:
 292                         /* Disable write access, set bit GPIO0. */
 293                         out_be32((void*)GPIO0_OR,
 294                                  in_be32((void*)GPIO0_OR) |
 295                                  CONFIG_SYS_EEPROM_WP);
 296                         state = 0;
 297                         break;
 298                 default:
 299                         /* Read current status back. */
 300                         state = ((in_be32((void*)GPIO0_OR) &
 301                                        CONFIG_SYS_EEPROM_WP) == 0);
 302                         break;
 303                 }
 304         }
 305         return state;
 306 }
 307
 308 int do_eep_wren(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 309 {
 310         int query = argc == 1;
 311         int state = 0;
 312
 313         if (query) {
 314                 /* Query write access state. */
 315                 state = eeprom_write_enable(CONFIG_SYS_I2C_EEPROM_ADDR, -1);
 316                 if (state < 0) {
 317                         puts("Query of write access state failed.\n");
 318                 } else {
 319                         printf("Write access for device 0x%0x is %sabled.\n",
 320                                CONFIG_SYS_I2C_EEPROM_ADDR,
 321                                state ? "en" : "dis");
 322                         state = 0;
 323                 }
 324         } else {
 325                 if (argv[1][0] == '0') {
 326                         /* Disable write access. */
 327                         state = eeprom_write_enable(CONFIG_SYS_I2C_EEPROM_ADDR,
 328                                                     0);
 329                 } else {
 330                         /* Enable write access. */
 331                         state = eeprom_write_enable(CONFIG_SYS_I2C_EEPROM_ADDR,
 332                                                     1);
 333                 }
 334                 if (state < 0)
 335                         puts("Setup of write access state failed.\n");
 336         }
 337
 338         return state;
 339 }
 340
 341 U_BOOT_CMD(eepwren,     2,      0,      do_eep_wren,
 342         "Enable / disable / query EEPROM write access",
 343         ""
 344 );
 345 #endif /* #if defined(CONFIG_SYS_EEPROM_WREN) */