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