arch/arm/mach-omap2/utils.c

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