arch/arm/mach-omap2/utils.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2011 Linaro Limited
   4  * Aneesh V <aneesh@ti.com>
   5  */
   6 #include <common.h>
   7 #include <env.h>
   8 #include <asm/setup.h>
   9 #include <asm/arch/sys_proto.h>
  10 #include <asm/omap_common.h>
  11
  12 static void do_cancel_out(u32 *num, u32 *den, u32 factor)
  13 {
  14         while (1) {
  15                 if (((*num)/factor*factor == (*num)) &&
  16                    ((*den)/factor*factor == (*den))) {
  17                         (*num) /= factor;
  18                         (*den) /= factor;
  19                 } else
  20                         break;
  21         }
  22 }
  23
  24 #ifdef CONFIG_FASTBOOT_FLASH
  25 static void omap_set_fastboot_cpu(void)
  26 {
  27         char *cpu;
  28         u32 cpu_rev = omap_revision();
  29
  30         switch (cpu_rev) {
  31         case DRA762_ES1_0:
  32         case DRA762_ABZ_ES1_0:
  33         case DRA762_ACD_ES1_0:
  34                 cpu = "DRA762";
  35                 break;
  36         case DRA752_ES1_0:
  37         case DRA752_ES1_1:
  38         case DRA752_ES2_0:
  39                 cpu = "DRA752";
  40                 break;
  41         case DRA722_ES1_0:
  42         case DRA722_ES2_0:
  43         case DRA722_ES2_1:
  44                 cpu = "DRA722";
  45                 break;
  46         default:
  47                 cpu = NULL;
  48                 printf("Warning: fastboot.cpu: unknown CPU rev: %u\n", cpu_rev);
  49         }
  50
  51         env_set("fastboot.cpu", cpu);
  52 }
  53
  54 static void omap_set_fastboot_secure(void)
  55 {
  56         const char *secure;
  57         u32 dev = get_device_type();
  58
  59         switch (dev) {
  60         case EMU_DEVICE:
  61                 secure = "EMU";
  62                 break;
  63         case HS_DEVICE:
  64                 secure = "HS";
  65                 break;
  66         case GP_DEVICE:
  67                 secure = "GP";
  68                 break;
  69         default:
  70                 secure = NULL;
  71                 printf("Warning: fastboot.secure: unknown CPU sec: %u\n", dev);
  72         }
  73
  74         env_set("fastboot.secure", secure);
  75 }
  76
  77 static void omap_set_fastboot_board_rev(void)
  78 {
  79         const char *board_rev;
  80
  81         board_rev = env_get("board_rev");
  82         if (board_rev == NULL)
  83                 printf("Warning: fastboot.board_rev: unknown board revision\n");
  84
  85         env_set("fastboot.board_rev", board_rev);
  86 }
  87
  88 #ifdef CONFIG_FASTBOOT_FLASH_MMC
  89 static u32 omap_mmc_get_part_size(const char *part)
  90 {
  91         int res;
  92         struct blk_desc *dev_desc;
  93         struct disk_partition info;
  94         u64 sz = 0;
  95
  96         dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  97         if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  98                 pr_err("invalid mmc device\n");
  99                 return 0;
 100         }
 101
 102         /* Check only for EFI (GPT) partition table */
 103         res = part_get_info_by_name_type(dev_desc, part, &info, PART_TYPE_EFI);
 104         if (res < 0)
 105                 return 0;
 106
 107         /* Calculate size in bytes */
 108         sz = (info.size * (u64)info.blksz);
 109         /* to KiB */
 110         sz >>= 10;
 111
 112         return (u32)sz;
 113 }
 114
 115 static void omap_set_fastboot_userdata_size(void)
 116 {
 117         char buf[16];
 118         u32 sz_kb;
 119
 120         sz_kb = omap_mmc_get_part_size("userdata");
 121         if (sz_kb == 0)
 122                 return; /* probably it's not Android partition table */
 123
 124         sprintf(buf, "%u", sz_kb);
 125         env_set("fastboot.userdata_size", buf);
 126 }
 127 #else
 128 static inline void omap_set_fastboot_userdata_size(void)
 129 {
 130 }
 131 #endif /* CONFIG_FASTBOOT_FLASH_MMC */
 132
 133 static void omap_set_fastboot_product(void)
 134 {
 135         const char *board_name;
 136
 137         board_name = env_get("board_name");
 138         if (board_name == NULL)
 139                 printf("Warning: fastboot.product: unknown board\n");
 140
 141         env_set("fastboot.product", board_name);
 142 }
 143
 144 void omap_set_fastboot_vars(void)
 145 {
 146         omap_set_fastboot_cpu();
 147         omap_set_fastboot_secure();
 148         omap_set_fastboot_board_rev();
 149         omap_set_fastboot_userdata_size();
 150         omap_set_fastboot_product();
 151 }
 152 #endif /* CONFIG_FASTBOOT_FLASH */
 153
 154 /*
 155  * Cancel out the denominator and numerator of a fraction
 156  * to get smaller numerator and denominator.
 157  */
 158 void cancel_out(u32 *num, u32 *den, u32 den_limit)
 159 {
 160         do_cancel_out(num, den, 2);
 161         do_cancel_out(num, den, 3);
 162         do_cancel_out(num, den, 5);
 163         do_cancel_out(num, den, 7);
 164         do_cancel_out(num, den, 11);
 165         do_cancel_out(num, den, 13);
 166         do_cancel_out(num, den, 17);
 167         while ((*den) > den_limit) {
 168                 *num /= 2;
 169                 /*
 170                  * Round up the denominator so that the final fraction
 171                  * (num/den) is always <= the desired value
 172                  */
 173                 *den = (*den + 1) / 2;
 174         }
 175 }
 176
 177 __weak void omap_die_id(unsigned int *die_id)
 178 {
 179         die_id[0] = die_id[1] = die_id[2] = die_id[3] = 0;
 180 }
 181
 182 void omap_die_id_serial(void)
 183 {
 184         unsigned int die_id[4] = { 0 };
 185         char serial_string[17] = { 0 };
 186
 187         omap_die_id((unsigned int *)&die_id);
 188
 189         if (!env_get("serial#")) {
 190                 snprintf(serial_string, sizeof(serial_string),
 191                         "%08x%08x", die_id[0], die_id[3]);
 192
 193                 env_set("serial#", serial_string);
 194         }
 195 }
 196
 197 void omap_die_id_get_board_serial(struct tag_serialnr *serialnr)
 198 {
 199         char *serial_string;
 200         unsigned long long serial;
 201
 202         serial_string = env_get("serial#");
 203
 204         if (serial_string) {
 205                 serial = simple_strtoull(serial_string, NULL, 16);
 206
 207                 serialnr->high = (unsigned int) (serial >> 32);
 208                 serialnr->low = (unsigned int) (serial & 0xffffffff);
 209         } else {
 210                 serialnr->high = 0;
 211                 serialnr->low = 0;
 212         }
 213 }
 214
 215 void omap_die_id_usbethaddr(void)
 216 {
 217         unsigned int die_id[4] = { 0 };
 218         unsigned char mac[6] = { 0 };
 219
 220         omap_die_id((unsigned int *)&die_id);
 221
 222         if (!env_get("usbethaddr")) {
 223                 /*
 224                  * Create a fake MAC address from the processor ID code.
 225                  * First byte is 0x02 to signify locally administered.
 226                  */
 227                 mac[0] = 0x02;
 228                 mac[1] = die_id[3] & 0xff;
 229                 mac[2] = die_id[2] & 0xff;
 230                 mac[3] = die_id[1] & 0xff;
 231                 mac[4] = die_id[0] & 0xff;
 232                 mac[5] = (die_id[0] >> 8) & 0xff;
 233
 234                 eth_env_set_enetaddr("usbethaddr", mac);
 235
 236                 if (!env_get("ethaddr"))
 237                         eth_env_set_enetaddr("ethaddr", mac);
 238         }
 239 }
 240
 241 void omap_die_id_display(void)
 242 {
 243         unsigned int die_id[4] = { 0 };
 244
 245         omap_die_id(die_id);
 246
 247         printf("OMAP die ID: %08x%08x%08x%08x\n", die_id[3], die_id[2],
 248                 die_id[1], die_id[0]);
 249 }