FreeCalypso > hg > freecalypso-sw

annotate target-utils/libload/amdflash.c @ 923:10b4bed10192

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gsm-fw/L1: fix for the DSP patch corruption bug The L1 code we got from the LoCosto fw contains a feature for DSP CPU load measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the code dealing with that feature is conditionalized as #if (DSP >= 38), but one spot was missed, and the MCU code was writing into an API word dealing with this feature. In TCS211 this DSP API word happens to be used by the DSP code patch, hence that write was corrupting the patched DSP code.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Mon, 19 Oct 2015 17:13:56 +0000 (2015-10-19)
parents cc1d2413991a
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 }