FreeCalypso > hg > freecalypso-sw
view target-utils/libload/intelflash.c @ 923:10b4bed10192
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 | d7f409493eb6 |
children |
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/* * This module implements the INFB and INFW commands for programming * Intel-style flash memories. The syntax and operation are exactly * the same as the AMD flash counterparts AMFB and AMFW. * * The intel-rewrite-sector command (erase+program with a minimum of * vulnerability for brickable-boot Compal phones) is implemented * here as well. */ #include <sys/types.h> #include "types.h" static u32 base_addr; void cmd_INFB(argbulk) char *argbulk; { char *argv[2]; u_long addr; if (parse_args(argbulk, 1, 1, argv, 0) < 0) return; if (parse_hexarg(argv[0], 8, &addr) < 0) { printf("ERROR: argument must be a valid 32-bit hex address\n"); return; } if (addr & 1) { printf("ERROR: odd address\n"); return; } base_addr = addr; } void cmd_INFW(argbulk) char *argbulk; { char *argv[3], *s; u_long offset; volatile u16 *flashptr; u32 datum; /* needs to be u32 for decode_hex_digits() */ u16 stat; int i; if (parse_args(argbulk, 2, 2, argv, 0) < 0) return; if (parse_hexarg(argv[0], 8, &offset) < 0) { printf("ERROR: offset argument must a valid 32-bit hex value\n"); return; } if (offset & 1) { printf("ERROR: odd offset argument\n"); return; } flashptr = (volatile u16 *)(base_addr + offset); for (s = argv[1]; *s; flashptr++, s += 4) { if (decode_hex_digits(s, 4, &datum) < 0) { printf("ERROR: bad INFW hex string argument\n"); return; } *flashptr = 0x40; *flashptr = datum; for (i = 10000; i; i--) { stat = *flashptr; if (stat & 0x80) break; } if (!i) { printf("ERROR: flash write timeout at %08X\n", (u_long) flashptr); return; } if (stat & 0x10) { printf("ERROR: program operation failed at %08X\n", (u_long) flashptr); return; } } } void cmd_intel_rewrite_sector(argbulk) char *argbulk; { char *argv[4]; u_long srcaddr, dstaddr, len; const u16 *srcptr; volatile u16 *flashptr; u16 stat; if (parse_args(argbulk, 3, 3, argv, 0) < 0) return; if (parse_hexarg(argv[0], 8, &srcaddr) < 0) { invarg: printf("ERROR: invalid argument(s)\n"); return; } if (parse_hexarg(argv[1], 8, &dstaddr) < 0) goto invarg; if (parse_hexarg(argv[2], 8, &len) < 0) goto invarg; if (srcaddr & 1 || dstaddr & 1 || len & 1) { printf("ERROR: all 3 arguments must be even\n"); return; } srcptr = (const u16 *) srcaddr; flashptr = (volatile u16 *) dstaddr; /* unlock the flash sector first */ *flashptr = 0x60; *flashptr = 0xD0; /* clear SR */ *flashptr = 0x50; /* erase */ *flashptr = 0x20; *flashptr = 0xD0; /* wait for erase completion */ for (;;) { stat = *flashptr; if (stat & 0x80) break; } if (stat & 0x30) { printf("ERROR: erase operation failed!\n"); return; } /* now program the new content */ for (; len; len -= 2) { *flashptr = 0x40; *flashptr = *srcptr++; for (;;) { stat = *flashptr; if (stat & 0x80) break; } flashptr++; } printf("Operation complete, final SR: %02X\n", stat & 0xFF); }