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[/] [adv_debug_sys/] [trunk/] [Software/] [adv_jtag_bridge/] [bsdl.c] - Rev 14
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/* bsdl.c - BSDL file handler for the advanced JTAG bridge Copyright(C) 2008 Nathan Yawn This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <sys/types.h> #include <string.h> #include <stdio.h> #include <dirent.h> #include "bsdl.h" #include "bsdl_parse.h" #define debug(...) //fprintf(stderr, __VA_ARGS__ ) // Globals to deal with directory names #define MAX_BSDL_DIRS 64 // Any more than this would take a looooong time... static char *bsdl_dirs[MAX_BSDL_DIRS]; static int bsdl_current_dir = 0; // We try them in reverse order // Globals to hold the current, open directory DIR *bsdl_open_dir = NULL; // Globals to hold BSDL info static bsdlinfo *bsdl_head = NULL; static bsdlinfo *bsdl_tail = NULL; static bsdlinfo *bsdl_last = NULL; // optimization: pointer to the last struct we used (not necessarily the last in the linked list) // Prototypes for local functions bsdlinfo *get_bsdl_info(uint32_t idcode); ////////////////////////////////////////////////////////////////////// // API for init and config void bsdl_init(void) { bsdl_dirs[0] = strdup("/opt/bsdl"); bsdl_dirs[1] = strdup("/usr/share/bsdl"); bsdl_dirs[2] = strdup("~/.bsdl"); bsdl_dirs[3] = strdup("."); bsdl_current_dir = 3; } void bsdl_add_directory(const char *dirname) { if(bsdl_current_dir >= (MAX_BSDL_DIRS-1)) { printf("Max BSDL dirs (%d) exceeded; failed to add directory %s\n", MAX_BSDL_DIRS, dirname); return; } bsdl_current_dir++; bsdl_dirs[bsdl_current_dir] = strdup(dirname); } /////////////////////////////////////////////////////////////////// // API to get device info from BSDL files, if available const char * bsdl_get_name(uint32_t idcode) { bsdlinfo *info; info = get_bsdl_info(idcode); if(info != NULL) return info->name; return NULL; } // Return the IR length of the device with the given IDCODE, // if its BSDL file is available. Returns -1 on // error, which is an invalid size. int bsdl_get_IR_size(uint32_t idcode) { bsdlinfo *info; info = get_bsdl_info(idcode); if(info != NULL) return info->IR_size; return -1; } // Returns the DEBUG command for the device with the gived IDCODE, // if its BSDL file is available. Returns 0xFFFFFFFF on error, // which is as invalid command (because it's the BYPASS command) uint32_t bsdl_get_debug_cmd(uint32_t idcode) { bsdlinfo *info; info = get_bsdl_info(idcode); if(info != NULL) return info->cmd_debug; return TAP_CMD_INVALID; } // Returns the USER1 command for the device with the gived IDCODE, // if its BSDL file is available. Returns 0xFFFFFFFF on error, // which is as invalid command (because it's the BYPASS command) uint32_t bsdl_get_user1_cmd(uint32_t idcode) { bsdlinfo *info; info = get_bsdl_info(idcode); if(info != NULL) return info->cmd_user1; return TAP_CMD_INVALID; } // Returns the IDCODE command for the device with the gived IDCODE, // if its BSDL file is available. Returns 0xFFFFFFFF on error, // which is as invalid command (because it's the BYPASS command) uint32_t bsdl_get_idcode_cmd(uint32_t idcode) { bsdlinfo *info; info = get_bsdl_info(idcode); if(info != NULL) return info->cmd_idcode; return TAP_CMD_INVALID; } ///////////////////////////////////////////////////////////////////////////// // Internal routines // This uses a lazy algorithm...first, search data we already have. // Then, parse new files (storing all data) only until we find // the data we want. bsdlinfo *get_bsdl_info(uint32_t idcode) { struct dirent *direntry = NULL; bsdlinfo *ptr = bsdl_head; char *c; // Check the last place we looked if(bsdl_last != NULL) if((bsdl_last->idcode & bsdl_last->idcode_mask) == (idcode & bsdl_last->idcode_mask)) return bsdl_last; // First, search through the info already parsed while(ptr != NULL) { if((ptr->idcode & ptr->idcode_mask) == (idcode & ptr->idcode_mask)) { bsdl_last = ptr; return ptr; } ptr = ptr->next; } // Parse files until we get the IDCODE we want while(1) { // Find and open a valid directory while(bsdl_open_dir == NULL) { if(bsdl_current_dir < 0) return NULL; // There are no more directories to check debug("Trying BSDL dir \'%s\'\n", bsdl_dirs[bsdl_current_dir]); bsdl_open_dir = opendir(bsdl_dirs[bsdl_current_dir]); if((bsdl_open_dir == NULL) && (bsdl_current_dir > 2)) // Don't warn if default dirs not found printf("Warning: unable to open BSDL directory \'%s\'\n", bsdl_dirs[bsdl_current_dir]); bsdl_current_dir--; direntry = NULL; } // Find a BSDL file do { direntry = readdir(bsdl_open_dir); if(direntry == NULL) { // We've exhausted this directory closedir(bsdl_open_dir); bsdl_open_dir = NULL; break; } // *** If a subdirectory, continue!! // Check if it's a BSDL file: .bsd, .bsdl, .BSD, .BSDL debug("Checking file \'%s\'\n", direntry->d_name); c = strrchr(direntry->d_name, '.'); debug("File extension is \'%s\'\n", c); if(c == NULL) continue; if(!strcmp(c, ".bsd") || !strcmp(c, ".bsdl") || !strcmp(c, ".BSD") || !strcmp(c, ".BSDL")) break; } while(1); if(direntry == NULL) // We need a new directory continue; // Parse the BSDL file we found debug("Parsing file \'%s\'\n", direntry->d_name); ptr = parse_extract_values(direntry->d_name); // If we got good data... if(ptr != NULL) { // Store the values... if(bsdl_head == NULL) { bsdl_head = ptr; bsdl_tail = ptr; } else { bsdl_tail->next = ptr; bsdl_tail = ptr; } // ...and return if we got an IDCODE match if((ptr->idcode & ptr->idcode_mask) == (idcode & ptr->idcode_mask)) { bsdl_last = ptr; return ptr; } } } // while(1), parse files until we find a match or run out of dirs / files // If no more files to parse and not found, return NULL return NULL; }
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