FreeCalypso > hg > freecalypso-sw
view gsm-fw/services/pcm/pcmcode.c @ 882:5ec4c2170cb7
gsm-fw/configs/gtamodem-gsm: feature at-rvtmux enabled
author | Space Falcon <falcon@ivan.Harhan.ORG> |
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date | Mon, 01 Jun 2015 01:38:25 +0000 |
parents | aed920085e59 |
children |
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/****************************************************************************** * Flash File System (ffs) * Idea, design and coding by Mads Meisner-Jensen, mmj@ti.com * * Condat PCM Compatibility Support * * $Id: pcmcode.c 1.46 Tue, 06 Nov 2001 11:55:21 +0100 tsj $ * ******************************************************************************/ #include <string.h> #include "pcm.h" #include "../ffs/ffs.h" #include "../ffs/ffstrace.h" extern const T_PCM_DESCRIPTION pcm_table[]; extern const UBYTE pcm_default_values[]; extern UBYTE pcm_mem []; /****************************************************************************** * ******************************************************************************/ // pcm_Init() has been renamed to pcm_init() so that it is not called // anywhere else than it should. The old pcm_Init() is now empty. This new // pcm_init() scans through the pcm file table and attempts to read each // file from ffs into the pcm RAM image. drv_Return_Type pcm_Init(void) { return PCM_INITIALIZED; } // Note that PCM file data chunks start with one byte for the file data // checksum, followed by another byte for the version. The third byte // (offset 2) is the start of the actual filedata. We ignore these first two // bytes e.g. we only read/write the actual file data! // look up a PCM file int pcm_lookup(char *pcm_name) { int i = 0; while (pcm_table[i].identifier != NULL) { if (!strcmp((char *) pcm_name, pcm_table[i].identifier + 5)) return i; i++; } return -1; // not found. } drv_Return_Type pcm_init(void) { int i = 0; effs_t error; ttw(ttr(TTrInit, "pcm_init" NL)); while (pcm_table[i].identifier != NULL) { error = ffs_fread(pcm_table[i].identifier, &pcm_mem[pcm_table[i].start + 2], (pcm_table[i].length - 2) * pcm_table[i].records); if (error < EFFS_OK) { // copy defaults to pcm_mem memcpy (&pcm_mem[pcm_table[i].start] + 2, &pcm_default_values[pcm_table[i].start - 2*i], pcm_table[i].records * (pcm_table[i].length - 2)); } pcm_mem[pcm_table[i].start + 1] = 1; // file version i++; } return PCM_INITIALIZED; } drv_Return_Type pcm_GetFileInfo(UBYTE * in_FileName, pcm_FileInfo_Type * out_FileInfoPtr) { int i = pcm_lookup((char*)in_FileName); ttw(ttr(TTrPcmRead, "pcm_gfi(%s)" NL, in_FileName)); if (i == -1) return PCM_INVALID_FILE; out_FileInfoPtr->FileLocation = &pcm_mem [pcm_table[i].start+2]; out_FileInfoPtr->FileSize = pcm_table[i].length -2; // As Condat has determined that all files is version 1, we just // hardwire exactly that! // out_FileInfoPtr->Version = pcm_mem [pcm_table[i].start + 1]; out_FileInfoPtr->Version = 1; return PCM_OK; } /****************************************************************************** * Normal read/write functions ******************************************************************************/ drv_Return_Type pcm_ReadFile(UBYTE * in_FileName, USHORT in_BufferSize, UBYTE * out_BufferPtr, UBYTE * out_VersionPtr) { int i = pcm_lookup((char*)in_FileName); ttw(ttr(TTrPcmRead, "pcm_rf(%s)" NL, in_FileName)); if (i == -1) return PCM_INVALID_FILE; if (in_BufferSize + 2 != pcm_table[i].length) return PCM_INVALID_SIZE; // checksum check removed --- it is redundant! memcpy (out_BufferPtr, &pcm_mem[pcm_table[i].start+2], in_BufferSize); *out_VersionPtr = pcm_mem[pcm_table[i].start+1]; return PCM_OK; } drv_Return_Type pcm_WriteFile(UBYTE * in_FileName, USHORT in_FileSize, UBYTE * in_BufferPtr) { int i = pcm_lookup((char*)in_FileName); ttw(ttr(TTrPcmWrite, "pcm_wf(%s)" NL, in_FileName)); if (i == -1) return PCM_INVALID_FILE; if (in_FileSize + 2 != pcm_table[i].length) return PCM_INVALID_SIZE; memcpy (&pcm_mem[pcm_table[i].start+2], in_BufferPtr, in_FileSize); // write the whole file to ffs! (ignoring errors) ffs_fwrite(pcm_table[i].identifier, &pcm_mem[pcm_table[i].start + 2], in_FileSize); return PCM_OK; } /****************************************************************************** * Record read/write functions ******************************************************************************/ /* Record files are implemented by having the first two bytes of a * file be equal to the record size. */ drv_Return_Type pcm_ReadRecord(UBYTE * in_FileName, USHORT in_Record, USHORT in_BufferSize, UBYTE * out_BufferPtr, UBYTE * out_VersionPtr, USHORT * out_MaxRecordsPtr) { int i = pcm_lookup((char*)in_FileName); ttw(ttr(TTrPcmRead, "pcm_rr(%s)" NL, in_FileName)); if (i == -1) return PCM_INVALID_FILE; if (in_BufferSize + 2 != pcm_table[i].length) return PCM_INVALID_SIZE; if (in_Record == 0 || in_Record > pcm_table[i].records) return PCM_INVALID_RECORD; memcpy (out_BufferPtr, &pcm_mem[pcm_table[i].start + 2 + (in_Record-1) * in_BufferSize], in_BufferSize); *out_MaxRecordsPtr = pcm_table[i].records; *out_VersionPtr = pcm_mem [pcm_table[i].start + 1]; return PCM_OK; } drv_Return_Type pcm_WriteRecord(UBYTE * in_FileName, USHORT in_Record, USHORT in_BufferSize, UBYTE * in_BufferPtr) { int i = pcm_lookup((char*)in_FileName); ttw(ttr(TTrPcmWrite, "pcm_wr(%s)" NL, in_FileName)); if (i == -1) return PCM_INVALID_FILE; if (in_BufferSize + 2 != pcm_table[i].length) return PCM_INVALID_SIZE; if (in_Record == 0 || in_Record > pcm_table[i].records) return PCM_INVALID_RECORD; memcpy (&pcm_mem [pcm_table[i].start + 2 + (in_Record-1) * in_BufferSize], in_BufferPtr, in_BufferSize); // write the whole file to ffs! (ignoring errors) ffs_fwrite(pcm_table[i].identifier, &pcm_mem [pcm_table[i].start + 2], pcm_table[i].records * (pcm_table[i].length - 2)); return PCM_OK; }