diff options
Diffstat (limited to 'common/cmd_fdc.c')
| -rw-r--r-- | common/cmd_fdc.c | 93 |
1 files changed, 83 insertions, 10 deletions
diff --git a/common/cmd_fdc.c b/common/cmd_fdc.c index 8e6b7350c..e45b3361c 100644 --- a/common/cmd_fdc.c +++ b/common/cmd_fdc.c @@ -51,7 +51,7 @@ #include <rtc.h> #endif -#if (CONFIG_COMMANDS & CFG_CMD_FDC) +#if ((CONFIG_COMMANDS & CFG_CMD_FDC) || (CONFIG_COMMANDS & CFG_CMD_FDOS)) typedef struct { @@ -192,7 +192,10 @@ static FDC_COMMAND_STRUCT cmd; /* global command struct */ /* reads a Register of the FDC */ unsigned char read_fdc_reg(unsigned int addr) { - volatile unsigned char *val = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + (addr * CFG_ISA_IO_STRIDE) + CFG_ISA_IO_OFFSET); + volatile unsigned char *val = + (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + + (addr * CFG_ISA_IO_STRIDE) + + CFG_ISA_IO_OFFSET); return val [0]; } @@ -200,7 +203,10 @@ unsigned char read_fdc_reg(unsigned int addr) /* writes a Register of the FDC */ void write_fdc_reg(unsigned int addr, unsigned char val) { - volatile unsigned char *tmp = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + (addr * CFG_ISA_IO_STRIDE) + CFG_ISA_IO_OFFSET); + volatile unsigned char *tmp = + (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + + (addr * CFG_ISA_IO_STRIDE) + + CFG_ISA_IO_OFFSET); tmp[0]=val; } @@ -279,7 +285,8 @@ int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) head = sect / pFG->sect; /* head nr */ sect = sect % pFG->sect; /* remaining blocks */ sect++; /* sectors are 1 based */ - PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr); + PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n", + pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr); if(head|=0) { /* max heads = 2 */ pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */ @@ -588,7 +595,7 @@ int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) * setup the fdc according the datasheet * assuming in PS2 Mode */ -int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) +int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) { int i; @@ -601,7 +608,7 @@ int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) for(i=0; i<255; i++) /* then we wait some time */ udelay(500); /* then, we clear the reset in the DOR */ - pCMD->drive=CFG_FDC_DRIVE_NUMBER; + pCMD->drive=drive; select_fdc_drive(pCMD); /* initialize the CCR */ write_fdc_reg(FDC_CCR,pFG->rate); @@ -621,9 +628,8 @@ int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) PRINTF("Sense Interrupt for drive %d failed\n",i); } } - /* assuming drive 0 for rest of configuration - * issue the configure command */ - pCMD->drive=CFG_FDC_DRIVE_NUMBER; + /* issue the configure command */ + pCMD->drive=drive; select_fdc_drive(pCMD); pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE; if(fdc_issue_cmd(pCMD,pFG)==FALSE) { @@ -644,7 +650,74 @@ int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) /* write_fdc_reg(FDC_DOR,0x04); */ return TRUE; } +#endif /* ((CONFIG_COMMANDS & CFG_CMD_FDC)||(CONFIG_COMMANDS & CFG_CMD_FDOS))*/ + +#if (CONFIG_COMMANDS & CFG_CMD_FDOS) + +/* Low level functions for the Floppy-DOS layer */ +/************************************************************************** +* int fdc_fdos_init +* initialize the FDC layer +* +*/ +int fdc_fdos_init (int drive) +{ + FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type; + FDC_COMMAND_STRUCT *pCMD = &cmd; + + /* setup FDC and scan for drives */ + if(fdc_setup(drive,pCMD,pFG)==FALSE) { + printf("\n** Error in setup FDC **\n"); + return FALSE; + } + if(fdc_check_drive(pCMD,pFG)==FALSE) { + printf("\n** Error in check_drives **\n"); + return FALSE; + } + if((pCMD->flags&(1<<drive))==0) { + /* drive not available */ + printf("\n** Drive %d not available **\n",drive); + return FALSE; + } + if((pCMD->flags&(0x10<<drive))==0) { + /* no disk inserted */ + printf("\n** No disk inserted in drive %d **\n",drive); + return FALSE; + } + /* ok, we have a valid source */ + pCMD->drive=drive; + + /* read first block */ + pCMD->blnr=0; + return TRUE; +} +/************************************************************************** +* int fdc_fdos_seek +* parameter is a block number +*/ +int fdc_fdos_seek (int where) +{ + FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type; + FDC_COMMAND_STRUCT *pCMD = &cmd; + + pCMD -> blnr = where ; + return (fdc_seek (pCMD, pFG)); +} +/************************************************************************** +* int fdc_fdos_read +* the length is in block number +*/ +int fdc_fdos_read (void *buffer, int len) +{ + FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type; + FDC_COMMAND_STRUCT *pCMD = &cmd; + + return (fdc_read_data (buffer, len, pCMD, pFG)); +} +#endif /* (CONFIG_COMMANDS & CFG_CMD_FDOS) */ + +#if (CONFIG_COMMANDS & CFG_CMD_FDC) /**************************************************************************** * main routine do_fdcboot */ @@ -677,7 +750,7 @@ int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 1; } /* setup FDC and scan for drives */ - if(fdc_setup(pCMD,pFG)==FALSE) { + if(fdc_setup(boot_drive,pCMD,pFG)==FALSE) { printf("\n** Error in setup FDC **\n"); return 1; } |