FreeCalypso > hg > freecalypso-tools

annotate target-utils/loadagent/amdflash.c @ 995:74024eb17e04

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fc-loadtool help: improve language regarding 16 MiB flash chips In FC project history, 16 MiB flash originally meant Pirelli DP-L10. Then we got FCDEV3B with the same flash (our own design), but now we are discovering more Calypso devices that used such large flash, both late Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to migrate to more generic or neutral language in associated documentation, without giving elevated status to specific examples that drove our early project history.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Dec 2023 21:11:12 +0000
parents b34384991094
children
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1 /*
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2 * This module implements the AMFB and AMFW commands for programming
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3 * AMD-style flash memories. Syntax:
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4 *
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5 * AMFB <baseaddr> -- sets the base address for subsequent AMFW commands
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6 * AMFW <offset> <hexstring> -- the actual flash write operation
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7 *
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8 * The flash memory is assumed to be 16 bits wide. The hex string
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9 * argument to the AMFW command is just data, with no header, address,
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10 * length, checksum or other additions. The number of hex digits in the
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11 * string must be a multiple of 4, and the byte order is the same as
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12 * that of TI's *.m0 files: we interpret the string as consisting of
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13 * 16-bit words rather than bytes.
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14 *
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15 * The address to which each flash write is directed is the sum of the
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16 * base given to AMFB and the offset given to AMFW. The fixed offsets
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17 * of 0xAAA and 0x554 (0x555 and 0x2AA in words) prescribed for the flash
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18 * programming command sequence are also made from the base set with AMFB.
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19 */
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20
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21 #include <sys/types.h>
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22 #include "types.h"
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23
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24 static u32 base_addr;
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25
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26 void
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27 cmd_AMFB(argbulk)
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28 char *argbulk;
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29 {
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30 char *argv[2];
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31 u_long addr;
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32
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33 if (parse_args(argbulk, 1, 1, argv, 0) < 0)
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34 return;
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35 if (parse_hexarg(argv[0], 8, &addr) < 0) {
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36 printf("ERROR: argument must be a valid 32-bit hex address\n");
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37 return;
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38 }
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39 if (addr & 1) {
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40 printf("ERROR: odd address\n");
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41 return;
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42 }
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43 base_addr = addr;
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44 }
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45
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46 void
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47 cmd_AMFW(argbulk)
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48 char *argbulk;
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49 {
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50 char *argv[3], *s;
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51 u_long offset;
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52 volatile u16 *flashptr;
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53 u32 datum; /* needs to be u32 for decode_hex_digits() */
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54 int i;
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55
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56 if (parse_args(argbulk, 2, 2, argv, 0) < 0)
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57 return;
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58 if (parse_hexarg(argv[0], 8, &offset) < 0) {
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59 printf("ERROR: offset argument must a valid 32-bit hex value\n");
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60 return;
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61 }
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62 if (offset & 1) {
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63 printf("ERROR: odd offset argument\n");
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64 return;
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65 }
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66 flashptr = (volatile u16 *)(base_addr + offset);
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67 for (s = argv[1]; *s; flashptr++, s += 4) {
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68 if (decode_hex_digits(s, 4, &datum) < 0) {
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69 printf("ERROR: bad AMFW hex string argument\n");
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70 return;
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71 }
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72 if (*flashptr != 0xFFFF) {
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73 printf("ERROR: flash not blank at %08X\n",
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74 (u_long) flashptr);
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75 return;
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76 }
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77 *(volatile u16 *)(base_addr + 0xAAA) = 0xAA;
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78 *(volatile u16 *)(base_addr + 0x554) = 0x55;
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79 *(volatile u16 *)(base_addr + 0xAAA) = 0xA0;
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80 *flashptr = datum;
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81 for (i = 10000; i; i--)
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82 if (*flashptr == datum)
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83 break;
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84 if (!i) {
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85 printf("ERROR: flash write timeout at %08X\n",
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86 (u_long) flashptr);
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87 return;
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88 }
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89 }
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90 }
659
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91
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92 amdflash_binary_prog(offset, nwords, data)
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93 u32 offset;
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94 unsigned nwords;
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95 u16 *data;
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96 {
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97 volatile u16 *flashptr;
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98 int i;
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99
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100 flashptr = (volatile u16 *)(base_addr + offset);
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101 while (nwords) {
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102 if (*flashptr != 0xFFFF) {
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103 serial_out(0x15); /* NAK */
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104 printf("ERROR: flash not blank at %08X\n",
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105 (u_long) flashptr);
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106 return(-1);
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107 }
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108 *(volatile u16 *)(base_addr + 0xAAA) = 0xAA;
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109 *(volatile u16 *)(base_addr + 0x554) = 0x55;
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110 *(volatile u16 *)(base_addr + 0xAAA) = 0xA0;
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111 *flashptr = *data;
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112 for (i = 10000; i; i--)
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113 if (*flashptr == *data)
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114 break;
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115 if (!i) {
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116 serial_out(0x15); /* NAK */
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
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parents: 658
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117 printf("ERROR: flash write timeout at %08X\n",
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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118 (u_long) flashptr);
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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119 return(-1);
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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120 }
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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121 flashptr++;
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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122 data++;
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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123 nwords--;
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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124 }
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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125 return(0);
761e8b0c65b0 loadagent: first step in implementation of binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 658
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126 }
660
b34384991094 loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 659
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127
b34384991094 loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 659
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128 void
b34384991094 loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 659
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129 cmd_AMFWB()
b34384991094 loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 659
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130 {
b34384991094 loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 659
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131 binary_flash_prog_main(amdflash_binary_prog);
b34384991094 loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
parents: 659
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132 }