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