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