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annotate target-utils/libload/intelflash.c @ 504:7b2ceea92a2e

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osx.c: osx_alloc_prim() done
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Tue, 01 Jul 2014 19:08:20 +0000
parents d7f409493eb6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
404
7daea2476062 loadagent: Intel flash support added, compiles
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
7daea2476062 loadagent: Intel flash support added, compiles
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2 * This module implements the INFB and INFW commands for programming
7daea2476062 loadagent: Intel flash support added, compiles
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3 * Intel-style flash memories. The syntax and operation are exactly
7daea2476062 loadagent: Intel flash support added, compiles
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4 * the same as the AMD flash counterparts AMFB and AMFW.
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5 *
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6 * The intel-rewrite-sector command (erase+program with a minimum of
d7f409493eb6 loadagent: intel-rewrite-sector implemented
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7 * vulnerability for brickable-boot Compal phones) is implemented
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8 * here as well.
404
7daea2476062 loadagent: Intel flash support added, compiles
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9 */
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10
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11 #include <sys/types.h>
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12 #include "types.h"
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13
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14 static u32 base_addr;
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15
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16 void
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17 cmd_INFB(argbulk)
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18 char *argbulk;
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19 {
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20 char *argv[2];
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21 u_long addr;
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22
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23 if (parse_args(argbulk, 1, 1, argv, 0) < 0)
7daea2476062 loadagent: Intel flash support added, compiles
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24 return;
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25 if (parse_hexarg(argv[0], 8, &addr) < 0) {
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26 printf("ERROR: argument must be a valid 32-bit hex address\n");
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27 return;
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28 }
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29 if (addr & 1) {
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30 printf("ERROR: odd address\n");
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31 return;
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32 }
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33 base_addr = addr;
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34 }
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35
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36 void
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37 cmd_INFW(argbulk)
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38 char *argbulk;
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39 {
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40 char *argv[3], *s;
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41 u_long offset;
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42 volatile u16 *flashptr;
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43 u32 datum; /* needs to be u32 for decode_hex_digits() */
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44 u16 stat;
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45 int i;
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46
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47 if (parse_args(argbulk, 2, 2, argv, 0) < 0)
7daea2476062 loadagent: Intel flash support added, compiles
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48 return;
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49 if (parse_hexarg(argv[0], 8, &offset) < 0) {
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50 printf("ERROR: offset argument must a valid 32-bit hex value\n");
7daea2476062 loadagent: Intel flash support added, compiles
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51 return;
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52 }
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53 if (offset & 1) {
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54 printf("ERROR: odd offset argument\n");
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55 return;
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56 }
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57 flashptr = (volatile u16 *)(base_addr + offset);
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58 for (s = argv[1]; *s; flashptr++, s += 4) {
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59 if (decode_hex_digits(s, 4, &datum) < 0) {
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60 printf("ERROR: bad INFW hex string argument\n");
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61 return;
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62 }
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63 *flashptr = 0x40;
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64 *flashptr = datum;
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65 for (i = 10000; i; i--) {
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66 stat = *flashptr;
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67 if (stat & 0x80)
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68 break;
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69 }
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70 if (!i) {
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71 printf("ERROR: flash write timeout at %08X\n",
7daea2476062 loadagent: Intel flash support added, compiles
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72 (u_long) flashptr);
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73 return;
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74 }
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75 if (stat & 0x10) {
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76 printf("ERROR: program operation failed at %08X\n",
7daea2476062 loadagent: Intel flash support added, compiles
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77 (u_long) flashptr);
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78 return;
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79 }
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80 }
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81 }
411
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82
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83 void
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84 cmd_intel_rewrite_sector(argbulk)
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85 char *argbulk;
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86 {
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87 char *argv[4];
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88 u_long srcaddr, dstaddr, len;
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89 const u16 *srcptr;
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90 volatile u16 *flashptr;
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91 u16 stat;
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92
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93 if (parse_args(argbulk, 3, 3, argv, 0) < 0)
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94 return;
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95 if (parse_hexarg(argv[0], 8, &srcaddr) < 0) {
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96 invarg: printf("ERROR: invalid argument(s)\n");
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97 return;
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98 }
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99 if (parse_hexarg(argv[1], 8, &dstaddr) < 0)
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100 goto invarg;
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101 if (parse_hexarg(argv[2], 8, &len) < 0)
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102 goto invarg;
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103 if (srcaddr & 1 || dstaddr & 1 || len & 1) {
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104 printf("ERROR: all 3 arguments must be even\n");
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105 return;
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106 }
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107 srcptr = (const u16 *) srcaddr;
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108 flashptr = (volatile u16 *) dstaddr;
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109 /* unlock the flash sector first */
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110 *flashptr = 0x60;
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111 *flashptr = 0xD0;
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112 /* clear SR */
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113 *flashptr = 0x50;
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114 /* erase */
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115 *flashptr = 0x20;
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116 *flashptr = 0xD0;
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117 /* wait for erase completion */
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118 for (;;) {
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119 stat = *flashptr;
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120 if (stat & 0x80)
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121 break;
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122 }
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123 if (stat & 0x30) {
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124 printf("ERROR: erase operation failed!\n");
d7f409493eb6 loadagent: intel-rewrite-sector implemented
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125 return;
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126 }
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127 /* now program the new content */
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128 for (; len; len -= 2) {
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129 *flashptr = 0x40;
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130 *flashptr = *srcptr++;
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131 for (;;) {
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132 stat = *flashptr;
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133 if (stat & 0x80)
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134 break;
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135 }
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136 flashptr++;
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137 }
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138 printf("Operation complete, final SR: %02X\n", stat & 0xFF);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 404
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139 }