arch/mips/lasat/lasat_board.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Thomas Horsten <thh@lasat.com>
   4  * Copyright (C) 2000 LASAT Networks A/S.
   5  *
   6  * Routines specific to the LASAT boards
   7  */
   8 #include <linux/types.h>
   9 #include <linux/crc32.h>
  10 #include <asm/lasat/lasat.h>
  11 #include <linux/kernel.h>
  12 #include <linux/string.h>
  13 #include <linux/ctype.h>
  14 #include <linux/mutex.h>
  15 #include <asm/addrspace.h>
  16 #include "at93c.h"
  17 /* New model description table */
  18 #include "lasat_models.h"
  19
  20 static DEFINE_MUTEX(lasat_eeprom_mutex);
  21
  22 #define EEPROM_CRC(data, len) (~crc32(~0, data, len))
  23
  24 struct lasat_info lasat_board_info;
  25
  26 int EEPROMRead(unsigned int pos, unsigned char *data, int len)
  27 {
  28         int i;
  29
  30         for (i = 0; i < len; i++)
  31                 *data++ = at93c_read(pos++);
  32
  33         return 0;
  34 }
  35
  36 int EEPROMWrite(unsigned int pos, unsigned char *data, int len)
  37 {
  38         int i;
  39
  40         for (i = 0; i < len; i++)
  41                 at93c_write(pos++, *data++);
  42
  43         return 0;
  44 }
  45
  46 static void init_flash_sizes(void)
  47 {
  48         unsigned long *lb = lasat_board_info.li_flashpart_base;
  49         unsigned long *ls = lasat_board_info.li_flashpart_size;
  50         int i;
  51
  52         ls[LASAT_MTD_BOOTLOADER] = 0x40000;
  53         ls[LASAT_MTD_SERVICE] = 0xC0000;
  54         ls[LASAT_MTD_NORMAL] = 0x100000;
  55
  56         if (!IS_LASAT_200()) {
  57                 lasat_board_info.li_flash_base = 0x1e000000;
  58
  59                 lb[LASAT_MTD_BOOTLOADER] = 0x1e400000;
  60
  61                 if (lasat_board_info.li_flash_size > 0x200000) {
  62                         ls[LASAT_MTD_CONFIG] = 0x100000;
  63                         ls[LASAT_MTD_FS] = 0x500000;
  64                 }
  65         } else {
  66                 lasat_board_info.li_flash_base = 0x10000000;
  67
  68                 if (lasat_board_info.li_flash_size < 0x1000000) {
  69                         lb[LASAT_MTD_BOOTLOADER] = 0x10000000;
  70                         ls[LASAT_MTD_CONFIG] = 0x100000;
  71                         if (lasat_board_info.li_flash_size >= 0x400000)
  72                                 ls[LASAT_MTD_FS] =
  73                                      lasat_board_info.li_flash_size - 0x300000;
  74                 }
  75         }
  76
  77         for (i = 1; i < LASAT_MTD_LAST; i++)
  78                 lb[i] = lb[i-1] + ls[i-1];
  79 }
  80
  81 int lasat_init_board_info(void)
  82 {
  83         int c;
  84         unsigned long crc;
  85         unsigned long cfg0, cfg1;
  86         const struct product_info   *ppi;
  87         int i_n_base_models = N_BASE_MODELS;
  88         const char * const * i_txt_base_models = txt_base_models;
  89         int i_n_prids = N_PRIDS;
  90
  91         memset(&lasat_board_info, 0, sizeof(lasat_board_info));
  92
  93         /* First read the EEPROM info */
  94         EEPROMRead(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
  95                    sizeof(struct lasat_eeprom_struct));
  96
  97         /* Check the CRC */
  98         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
  99                     sizeof(struct lasat_eeprom_struct) - 4);
 100
 101         if (crc != lasat_board_info.li_eeprom_info.crc32) {
 102                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM CRC does "
 103                        "not match calculated, attempting to soldier on...\n");
 104         }
 105
 106         if (lasat_board_info.li_eeprom_info.version != LASAT_EEPROM_VERSION) {
 107                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM version "
 108                        "%d, wanted version %d, attempting to soldier on...\n",
 109                        (unsigned int)lasat_board_info.li_eeprom_info.version,
 110                        LASAT_EEPROM_VERSION);
 111         }
 112
 113         cfg0 = lasat_board_info.li_eeprom_info.cfg[0];
 114         cfg1 = lasat_board_info.li_eeprom_info.cfg[1];
 115
 116         if (LASAT_W0_DSCTYPE(cfg0) != 1) {
 117                 printk(KERN_WARNING "WARNING...\nWARNING...\n"
 118                        "Invalid configuration read from EEPROM, attempting to "
 119                        "soldier on...");
 120         }
 121         /* We have a valid configuration */
 122
 123         switch (LASAT_W0_SDRAMBANKSZ(cfg0)) {
 124         case 0:
 125                 lasat_board_info.li_memsize = 0x0800000;
 126                 break;
 127         case 1:
 128                 lasat_board_info.li_memsize = 0x1000000;
 129                 break;
 130         case 2:
 131                 lasat_board_info.li_memsize = 0x2000000;
 132                 break;
 133         case 3:
 134                 lasat_board_info.li_memsize = 0x4000000;
 135                 break;
 136         case 4:
 137                 lasat_board_info.li_memsize = 0x8000000;
 138                 break;
 139         default:
 140                 lasat_board_info.li_memsize = 0;
 141         }
 142
 143         switch (LASAT_W0_SDRAMBANKS(cfg0)) {
 144         case 0:
 145                 break;
 146         case 1:
 147                 lasat_board_info.li_memsize *= 2;
 148                 break;
 149         default:
 150                 break;
 151         }
 152
 153         switch (LASAT_W0_BUSSPEED(cfg0)) {
 154         case 0x0:
 155                 lasat_board_info.li_bus_hz = 60000000;
 156                 break;
 157         case 0x1:
 158                 lasat_board_info.li_bus_hz = 66000000;
 159                 break;
 160         case 0x2:
 161                 lasat_board_info.li_bus_hz = 66666667;
 162                 break;
 163         case 0x3:
 164                 lasat_board_info.li_bus_hz = 80000000;
 165                 break;
 166         case 0x4:
 167                 lasat_board_info.li_bus_hz = 83333333;
 168                 break;
 169         case 0x5:
 170                 lasat_board_info.li_bus_hz = 100000000;
 171                 break;
 172         }
 173
 174         switch (LASAT_W0_CPUCLK(cfg0)) {
 175         case 0x0:
 176                 lasat_board_info.li_cpu_hz =
 177                         lasat_board_info.li_bus_hz;
 178                 break;
 179         case 0x1:
 180                 lasat_board_info.li_cpu_hz =
 181                         lasat_board_info.li_bus_hz +
 182                         (lasat_board_info.li_bus_hz >> 1);
 183                 break;
 184         case 0x2:
 185                 lasat_board_info.li_cpu_hz =
 186                         lasat_board_info.li_bus_hz +
 187                         lasat_board_info.li_bus_hz;
 188                 break;
 189         case 0x3:
 190                 lasat_board_info.li_cpu_hz =
 191                         lasat_board_info.li_bus_hz +
 192                         lasat_board_info.li_bus_hz +
 193                         (lasat_board_info.li_bus_hz >> 1);
 194                 break;
 195         case 0x4:
 196                 lasat_board_info.li_cpu_hz =
 197                         lasat_board_info.li_bus_hz +
 198                         lasat_board_info.li_bus_hz +
 199                         lasat_board_info.li_bus_hz;
 200                 break;
 201         }
 202
 203         /* Flash size */
 204         switch (LASAT_W1_FLASHSIZE(cfg1)) {
 205         case 0:
 206                 lasat_board_info.li_flash_size = 0x200000;
 207                 break;
 208         case 1:
 209                 lasat_board_info.li_flash_size = 0x400000;
 210                 break;
 211         case 2:
 212                 lasat_board_info.li_flash_size = 0x800000;
 213                 break;
 214         case 3:
 215                 lasat_board_info.li_flash_size = 0x1000000;
 216                 break;
 217         case 4:
 218                 lasat_board_info.li_flash_size = 0x2000000;
 219                 break;
 220         }
 221
 222         init_flash_sizes();
 223
 224         lasat_board_info.li_bmid = LASAT_W0_BMID(cfg0);
 225         lasat_board_info.li_prid = lasat_board_info.li_eeprom_info.prid;
 226         if (lasat_board_info.li_prid == 0xffff || lasat_board_info.li_prid == 0)
 227                 lasat_board_info.li_prid = lasat_board_info.li_bmid;
 228
 229         /* Base model stuff */
 230         if (lasat_board_info.li_bmid > i_n_base_models)
 231                 lasat_board_info.li_bmid = i_n_base_models;
 232         strcpy(lasat_board_info.li_bmstr,
 233                i_txt_base_models[lasat_board_info.li_bmid]);
 234
 235         /* Product ID dependent values */
 236         c = lasat_board_info.li_prid;
 237         if (c >= i_n_prids) {
 238                 strcpy(lasat_board_info.li_namestr, "Unknown Model");
 239                 strcpy(lasat_board_info.li_typestr, "Unknown Type");
 240         } else {
 241                 ppi = &vendor_info_table[0].vi_product_info[c];
 242                 strcpy(lasat_board_info.li_namestr, ppi->pi_name);
 243                 if (ppi->pi_type)
 244                         strcpy(lasat_board_info.li_typestr, ppi->pi_type);
 245                 else
 246                         sprintf(lasat_board_info.li_typestr, "%d", 10 * c);
 247         }
 248
 249         return 0;
 250 }
 251
 252 void lasat_write_eeprom_info(void)
 253 {
 254         unsigned long crc;
 255
 256         mutex_lock(&lasat_eeprom_mutex);
 257
 258         /* Generate the CRC */
 259         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 260                     sizeof(struct lasat_eeprom_struct) - 4);
 261         lasat_board_info.li_eeprom_info.crc32 = crc;
 262
 263         /* Write the EEPROM info */
 264         EEPROMWrite(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 265                     sizeof(struct lasat_eeprom_struct));
 266
 267         mutex_unlock(&lasat_eeprom_mutex);
 268 }