diff options
Diffstat (limited to 'cmd/fdc.c')
| -rw-r--r-- | cmd/fdc.c | 752 |
1 files changed, 752 insertions, 0 deletions
diff --git a/cmd/fdc.c b/cmd/fdc.c new file mode 100644 index 0000000000..5766b5650b --- /dev/null +++ b/cmd/fdc.c @@ -0,0 +1,752 @@ +/* + * (C) Copyright 2001 + * Denis Peter, MPL AG, d.peter@mpl.ch. + * + * SPDX-License-Identifier: GPL-2.0+ + */ +/* + * Floppy Disk support + */ + +#include <common.h> +#include <config.h> +#include <command.h> +#include <image.h> + + +#undef FDC_DEBUG + +#ifdef FDC_DEBUG +#define PRINTF(fmt,args...) printf (fmt ,##args) +#else +#define PRINTF(fmt,args...) +#endif + +/*#if defined(CONFIG_CMD_DATE) */ +/*#include <rtc.h> */ +/*#endif */ + +typedef struct { + int flags; /* connected drives ect */ + unsigned long blnr; /* Logical block nr */ + uchar drive; /* drive no */ + uchar cmdlen; /* cmd length */ + uchar cmd[16]; /* cmd desc */ + uchar dma; /* if > 0 dma enabled */ + uchar result[11]; /* status information */ + uchar resultlen; /* lenght of result */ +} FDC_COMMAND_STRUCT; + +/* flags: only the lower 8bit used: + * bit 0 if set drive 0 is present + * bit 1 if set drive 1 is present + * bit 2 if set drive 2 is present + * bit 3 if set drive 3 is present + * bit 4 if set disk in drive 0 is inserted + * bit 5 if set disk in drive 1 is inserted + * bit 6 if set disk in drive 2 is inserted + * bit 7 if set disk in drive 4 is inserted + */ + +/* cmd indexes */ +#define COMMAND 0 +#define DRIVE 1 +#define CONFIG0 1 +#define SPEC_HUTSRT 1 +#define TRACK 2 +#define CONFIG1 2 +#define SPEC_HLT 2 +#define HEAD 3 +#define CONFIG2 3 +#define SECTOR 4 +#define SECTOR_SIZE 5 +#define LAST_TRACK 6 +#define GAP 7 +#define DTL 8 +/* result indexes */ +#define STATUS_0 0 +#define STATUS_PCN 1 +#define STATUS_1 1 +#define STATUS_2 2 +#define STATUS_TRACK 3 +#define STATUS_HEAD 4 +#define STATUS_SECT 5 +#define STATUS_SECT_SIZE 6 + + +/* Register addresses */ +#define FDC_BASE 0x3F0 +#define FDC_SRA FDC_BASE + 0 /* Status Register A */ +#define FDC_SRB FDC_BASE + 1 /* Status Register B */ +#define FDC_DOR FDC_BASE + 2 /* Digital Output Register */ +#define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */ +#define FDC_DSR FDC_BASE + 4 /* Data rate Register */ +#define FDC_MSR FDC_BASE + 4 /* Main Status Register */ +#define FDC_FIFO FDC_BASE + 5 /* FIFO */ +#define FDC_DIR FDC_BASE + 6 /* Digital Input Register */ +#define FDC_CCR FDC_BASE + 7 /* Configuration Control */ +/* Commands */ +#define FDC_CMD_SENSE_INT 0x08 +#define FDC_CMD_CONFIGURE 0x13 +#define FDC_CMD_SPECIFY 0x03 +#define FDC_CMD_RECALIBRATE 0x07 +#define FDC_CMD_READ 0x06 +#define FDC_CMD_READ_TRACK 0x02 +#define FDC_CMD_READ_ID 0x0A +#define FDC_CMD_DUMP_REG 0x0E +#define FDC_CMD_SEEK 0x0F + +#define FDC_CMD_SENSE_INT_LEN 0x01 +#define FDC_CMD_CONFIGURE_LEN 0x04 +#define FDC_CMD_SPECIFY_LEN 0x03 +#define FDC_CMD_RECALIBRATE_LEN 0x02 +#define FDC_CMD_READ_LEN 0x09 +#define FDC_CMD_READ_TRACK_LEN 0x09 +#define FDC_CMD_READ_ID_LEN 0x02 +#define FDC_CMD_DUMP_REG_LEN 0x01 +#define FDC_CMD_SEEK_LEN 0x03 + +#define FDC_FIFO_THR 0x0C +#define FDC_FIFO_DIS 0x00 +#define FDC_IMPLIED_SEEK 0x01 +#define FDC_POLL_DIS 0x00 +#define FDC_PRE_TRK 0x00 +#define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6) +#define FDC_MFM_MODE 0x01 /* MFM enable */ +#define FDC_SKIP_MODE 0x00 /* skip enable */ + +#define FDC_TIME_OUT 100000 /* time out */ +#define FDC_RW_RETRIES 3 /* read write retries */ +#define FDC_CAL_RETRIES 3 /* calibration and seek retries */ + + +/* Disk structure */ +typedef struct { + unsigned int size; /* nr of sectors total */ + unsigned int sect; /* sectors per track */ + unsigned int head; /* nr of heads */ + unsigned int track; /* nr of tracks */ + unsigned int stretch; /* !=0 means double track steps */ + unsigned char gap; /* gap1 size */ + unsigned char rate; /* data rate. |= 0x40 for perpendicular */ + unsigned char spec1; /* stepping rate, head unload time */ + unsigned char fmt_gap;/* gap2 size */ + unsigned char hlt; /* head load time */ + unsigned char sect_code;/* Sector Size code */ + const char * name; /* used only for predefined formats */ +} FD_GEO_STRUCT; + + +/* supported Floppy types (currently only one) */ +const static FD_GEO_STRUCT floppy_type[2] = { + { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */ + { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */ +}; + +static FDC_COMMAND_STRUCT cmd; /* global command struct */ + +/* If the boot drive number is undefined, we assume it's drive 0 */ +#ifndef CONFIG_SYS_FDC_DRIVE_NUMBER +#define CONFIG_SYS_FDC_DRIVE_NUMBER 0 +#endif + +/* Hardware access */ +#ifndef CONFIG_SYS_ISA_IO_STRIDE +#define CONFIG_SYS_ISA_IO_STRIDE 1 +#endif + +#ifndef CONFIG_SYS_ISA_IO_OFFSET +#define CONFIG_SYS_ISA_IO_OFFSET 0 +#endif + +/* Supporting Functions */ +/* reads a Register of the FDC */ +unsigned char read_fdc_reg(unsigned int addr) +{ + volatile unsigned char *val = + (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS + + (addr * CONFIG_SYS_ISA_IO_STRIDE) + + CONFIG_SYS_ISA_IO_OFFSET); + + return val [0]; +} + +/* writes a Register of the FDC */ +void write_fdc_reg(unsigned int addr, unsigned char val) +{ + volatile unsigned char *tmp = + (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS + + (addr * CONFIG_SYS_ISA_IO_STRIDE) + + CONFIG_SYS_ISA_IO_OFFSET); + tmp[0]=val; +} + +/* waits for an interrupt (polling) */ +int wait_for_fdc_int(void) +{ + unsigned long timeout; + timeout = FDC_TIME_OUT; + while((read_fdc_reg(FDC_SRA)&0x80)==0) { + timeout--; + udelay(10); + if(timeout==0) /* timeout occured */ + return false; + } + return true; +} + +/* reads a byte from the FIFO of the FDC and checks direction and RQM bit + of the MSR. returns -1 if timeout, or byte if ok */ +int read_fdc_byte(void) +{ + unsigned long timeout; + timeout = FDC_TIME_OUT; + while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) { + /* direction out and ready */ + udelay(10); + timeout--; + if(timeout==0) /* timeout occured */ + return -1; + } + return read_fdc_reg(FDC_FIFO); +} + +/* if the direction of the FIFO is wrong, this routine is used to + empty the FIFO. Should _not_ be used */ +int fdc_need_more_output(void) +{ + unsigned char c; + while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) { + c=(unsigned char)read_fdc_byte(); + printf("Error: more output: %x\n",c); + } + return true; +} + + +/* writes a byte to the FIFO of the FDC and checks direction and RQM bit + of the MSR */ +int write_fdc_byte(unsigned char val) +{ + unsigned long timeout; + timeout = FDC_TIME_OUT; + while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) { + /* direction in and ready for byte */ + timeout--; + udelay(10); + fdc_need_more_output(); + if(timeout==0) /* timeout occured */ + return false; + } + write_fdc_reg(FDC_FIFO,val); + return true; +} + +/* sets up all FDC commands and issues it to the FDC. If + the command causes direct results (no Execution Phase) + the result is be read as well. */ + +int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) +{ + int i; + unsigned long head,track,sect,timeout; + track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */ + sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */ + 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); + + if(head|=0) { /* max heads = 2 */ + pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */ + pCMD->cmd[HEAD]=(unsigned char) head; /* head register */ + } + else { + pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */ + pCMD->cmd[HEAD]=(unsigned char) head; /* head register */ + } + pCMD->cmd[TRACK]=(unsigned char) track; /* track */ + switch (pCMD->cmd[COMMAND]) { + case FDC_CMD_READ: + pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */ + pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */ + pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */ + pCMD->cmd[GAP]=pFG->gap; /* gap */ + pCMD->cmd[DTL]=0xFF; /* DTL */ + pCMD->cmdlen=FDC_CMD_READ_LEN; + pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */ + pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */ + pCMD->resultlen=0; /* result only after execution */ + break; + case FDC_CMD_SEEK: + pCMD->cmdlen=FDC_CMD_SEEK_LEN; + pCMD->resultlen=0; /* no result */ + break; + case FDC_CMD_CONFIGURE: + pCMD->cmd[CONFIG0]=0; + pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */ + pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */ + pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN; + pCMD->resultlen=0; /* no result */ + break; + case FDC_CMD_SPECIFY: + pCMD->cmd[SPEC_HUTSRT]=pFG->spec1; + pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */ + if(pCMD->dma==0) + pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */ + pCMD->cmdlen=FDC_CMD_SPECIFY_LEN; + pCMD->resultlen=0; /* no result */ + break; + case FDC_CMD_DUMP_REG: + pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN; + pCMD->resultlen=10; /* 10 byte result */ + break; + case FDC_CMD_READ_ID: + pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */ + pCMD->cmdlen=FDC_CMD_READ_ID_LEN; + pCMD->resultlen=7; /* 7 byte result */ + break; + case FDC_CMD_RECALIBRATE: + pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */ + pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN; + pCMD->resultlen=0; /* no result */ + break; + break; + case FDC_CMD_SENSE_INT: + pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN; + pCMD->resultlen=2; + break; + } + for(i=0;i<pCMD->cmdlen;i++) { + /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */ + if (write_fdc_byte(pCMD->cmd[i]) == false) { + PRINTF("Error: timeout while issue cmd%d\n",i); + return false; + } + } + timeout=FDC_TIME_OUT; + for(i=0;i<pCMD->resultlen;i++) { + while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) { + timeout--; + if(timeout==0) { + PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR)); + return false; + } + } + pCMD->result[i]=(unsigned char)read_fdc_byte(); + } + return true; +} + +/* selects the drive assigned in the cmd structur and + switches on the Motor */ +void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD) +{ + unsigned char val; + + val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */ + if((read_fdc_reg(FDC_DOR)&val)!=val) { + write_fdc_reg(FDC_DOR,val); + for(val=0;val<255;val++) + udelay(500); /* wait some time to start motor */ + } +} + +/* switches off the Motor of the specified drive */ +void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD) +{ + unsigned char val; + + val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */ + write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val)); +} + +/* issues a recalibrate command, waits for interrupt and + * issues a sense_interrupt */ +int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) +{ + pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE; + if (fdc_issue_cmd(pCMD, pFG) == false) + return false; + while (wait_for_fdc_int() != true); + + pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; + return(fdc_issue_cmd(pCMD,pFG)); +} + +/* issues a recalibrate command, waits for interrupt and + * issues a sense_interrupt */ +int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) +{ + pCMD->cmd[COMMAND]=FDC_CMD_SEEK; + if (fdc_issue_cmd(pCMD, pFG) == false) + return false; + while (wait_for_fdc_int() != true); + + pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; + return(fdc_issue_cmd(pCMD,pFG)); +} + +/* terminates current command, by not servicing the FIFO + * waits for interrupt and fills in the result bytes */ +int fdc_terminate(FDC_COMMAND_STRUCT *pCMD) +{ + int i; + for(i=0;i<100;i++) + udelay(500); /* wait 500usec for fifo overrun */ + while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */ + for(i=0;i<7;i++) { + pCMD->result[i]=(unsigned char)read_fdc_byte(); + } + return true; +} + +/* reads data from FDC, seek commands are issued automatic */ +int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) +{ + /* first seek to start address */ + unsigned long len,readblk,i,timeout,ii,offset; + unsigned char c,retriesrw,retriescal; + unsigned char *bufferw; /* working buffer */ + int sect_size; + int flags; + + flags=disable_interrupts(); /* switch off all Interrupts */ + select_fdc_drive(pCMD); /* switch on drive */ + sect_size=0x080<<pFG->sect_code; + retriesrw=0; + retriescal=0; + offset=0; + if (fdc_seek(pCMD, pFG) == false) { + stop_fdc_drive(pCMD); + if (flags) + enable_interrupts(); + return false; + } + if((pCMD->result[STATUS_0]&0x20)!=0x20) { + printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]); + stop_fdc_drive(pCMD); + if (flags) + enable_interrupts(); + return false; + } + /* now determine the next seek point */ + /* lastblk=pCMD->blnr + blocks; */ + /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */ + readblk=pFG->sect-(pCMD->blnr%pFG->sect); + PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr); + if(readblk>blocks) /* is end within 1st track */ + readblk=blocks; /* yes, correct it */ + PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr); + bufferw = &buffer[0]; /* setup working buffer */ + do { +retryrw: + len=sect_size * readblk; + pCMD->cmd[COMMAND]=FDC_CMD_READ; + if (fdc_issue_cmd(pCMD, pFG) == false) { + stop_fdc_drive(pCMD); + if (flags) + enable_interrupts(); + return false; + } + for (i=0;i<len;i++) { + timeout=FDC_TIME_OUT; + do { + c=read_fdc_reg(FDC_MSR); + if((c&0xC0)==0xC0) { + bufferw[i]=read_fdc_reg(FDC_FIFO); + break; + } + if((c&0xC0)==0x80) { /* output */ + PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c); + if(i>6) { + for(ii=0;ii<7;ii++) { + pCMD->result[ii]=bufferw[(i-7+ii)]; + } /* for */ + } + if(retriesrw++>FDC_RW_RETRIES) { + if (retriescal++>FDC_CAL_RETRIES) { + stop_fdc_drive(pCMD); + if (flags) + enable_interrupts(); + return false; + } + else { + PRINTF(" trying to recalibrate Try %d\n",retriescal); + if (fdc_recalibrate(pCMD, pFG) == false) { + stop_fdc_drive(pCMD); + if (flags) + enable_interrupts(); + return false; + } + retriesrw=0; + goto retrycal; + } /* else >FDC_CAL_RETRIES */ + } + else { + PRINTF("Read retry %d\n",retriesrw); + goto retryrw; + } /* else >FDC_RW_RETRIES */ + }/* if output */ + timeout--; + } while (true); + } /* for len */ + /* the last sector of a track or all data has been read, + * we need to get the results */ + fdc_terminate(pCMD); + offset+=(sect_size*readblk); /* set up buffer pointer */ + bufferw = &buffer[offset]; + pCMD->blnr+=readblk; /* update current block nr */ + blocks-=readblk; /* update blocks */ + if(blocks==0) + break; /* we are finish */ + /* setup new read blocks */ + /* readblk=pFG->head*pFG->sect; */ + readblk=pFG->sect; + if(readblk>blocks) + readblk=blocks; +retrycal: + /* a seek is necessary */ + if (fdc_seek(pCMD, pFG) == false) { + stop_fdc_drive(pCMD); + if (flags) + enable_interrupts(); + return false; + } + if((pCMD->result[STATUS_0]&0x20)!=0x20) { + PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]); + stop_fdc_drive(pCMD); + return false; + } + } while (true); /* start over */ + stop_fdc_drive(pCMD); /* switch off drive */ + if (flags) + enable_interrupts(); + return true; +} + +/* Scan all drives and check if drive is present and disk is inserted */ +int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) +{ + int i,drives,state; + /* OK procedure of data book is satisfied. + * trying to get some information over the drives */ + state=0; /* no drives, no disks */ + for(drives=0;drives<4;drives++) { + pCMD->drive=drives; + select_fdc_drive(pCMD); + pCMD->blnr=0; /* set to the 1st block */ + if (fdc_recalibrate(pCMD, pFG) == false) + continue; + if((pCMD->result[STATUS_0]&0x10)==0x10) + continue; + /* ok drive connected check for disk */ + state|=(1<<drives); + pCMD->blnr=pFG->size; /* set to the last block */ + if (fdc_seek(pCMD, pFG) == false) + continue; + pCMD->blnr=0; /* set to the 1st block */ + if (fdc_recalibrate(pCMD, pFG) == false) + continue; + pCMD->cmd[COMMAND]=FDC_CMD_READ_ID; + if (fdc_issue_cmd(pCMD, pFG) == false) + continue; + state|=(0x10<<drives); + } + stop_fdc_drive(pCMD); + for(i=0;i<4;i++) { + PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i, + ((state&(1<<i))==(1<<i)) ? "":"not ", + ((state&(0x10<<i))==(0x10<<i)) ? "":"no ", + ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : ""); + } + pCMD->flags=state; + return true; +} + + +/************************************************************************** +* int fdc_setup +* setup the fdc according the datasheet +* assuming in PS2 Mode +*/ +int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) +{ + int i; + +#ifdef CONFIG_SYS_FDC_HW_INIT + fdc_hw_init (); +#endif + /* first, we reset the FDC via the DOR */ + write_fdc_reg(FDC_DOR,0x00); + for(i=0; i<255; i++) /* then we wait some time */ + udelay(500); + /* then, we clear the reset in the DOR */ + pCMD->drive=drive; + select_fdc_drive(pCMD); + /* initialize the CCR */ + write_fdc_reg(FDC_CCR,pFG->rate); + /* then initialize the DSR */ + write_fdc_reg(FDC_DSR,pFG->rate); + if (wait_for_fdc_int() == false) { + PRINTF("Time Out after writing CCR\n"); + return false; + } + /* now issue sense Interrupt and status command + * assuming only one drive present (drive 0) */ + pCMD->dma=0; /* we don't use any dma at all */ + for(i=0;i<4;i++) { + /* issue sense interrupt for all 4 possible drives */ + pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; + if (fdc_issue_cmd(pCMD, pFG) == false) { + PRINTF("Sense Interrupt for drive %d failed\n",i); + } + } + /* issue the configure command */ + pCMD->drive=drive; + select_fdc_drive(pCMD); + pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE; + if (fdc_issue_cmd(pCMD, pFG) == false) { + PRINTF(" configure timeout\n"); + stop_fdc_drive(pCMD); + return false; + } + /* issue specify command */ + pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY; + if (fdc_issue_cmd(pCMD, pFG) == false) { + PRINTF(" specify timeout\n"); + stop_fdc_drive(pCMD); + return false; + + } + /* then, we clear the reset in the DOR */ + /* fdc_check_drive(pCMD,pFG); */ + /* write_fdc_reg(FDC_DOR,0x04); */ + + return true; +} + +/**************************************************************************** + * main routine do_fdcboot + */ +int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type; + FDC_COMMAND_STRUCT *pCMD = &cmd; + unsigned long addr,imsize; +#if defined(CONFIG_IMAGE_FORMAT_LEGACY) + image_header_t *hdr; /* used for fdc boot */ +#endif + unsigned char boot_drive; + int i,nrofblk; +#if defined(CONFIG_FIT) + const void *fit_hdr = NULL; +#endif + + switch (argc) { + case 1: + addr = CONFIG_SYS_LOAD_ADDR; + boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER; + break; + case 2: + addr = simple_strtoul(argv[1], NULL, 16); + boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER; + break; + case 3: + addr = simple_strtoul(argv[1], NULL, 16); + boot_drive=simple_strtoul(argv[2], NULL, 10); + break; + default: + return CMD_RET_USAGE; + } + /* setup FDC and scan for drives */ + if (fdc_setup(boot_drive, pCMD, pFG) == false) { + printf("\n** Error in setup FDC **\n"); + return 1; + } + if (fdc_check_drive(pCMD, pFG) == false) { + printf("\n** Error in check_drives **\n"); + return 1; + } + if((pCMD->flags&(1<<boot_drive))==0) { + /* drive not available */ + printf("\n** Drive %d not availabe **\n",boot_drive); + return 1; + } + if((pCMD->flags&(0x10<<boot_drive))==0) { + /* no disk inserted */ + printf("\n** No disk inserted in drive %d **\n",boot_drive); + return 1; + } + /* ok, we have a valid source */ + pCMD->drive=boot_drive; + /* read first block */ + pCMD->blnr=0; + if (fdc_read_data((unsigned char *)addr, 1, pCMD, pFG) == false) { + printf("\nRead error:"); + for(i=0;i<7;i++) + printf("result%d: 0x%02X\n",i,pCMD->result[i]); + return 1; + } + + switch (genimg_get_format ((void *)addr)) { +#if defined(CONFIG_IMAGE_FORMAT_LEGACY) + case IMAGE_FORMAT_LEGACY: + hdr = (image_header_t *)addr; + image_print_contents (hdr); + + imsize = image_get_image_size (hdr); + break; +#endif +#if defined(CONFIG_FIT) + case IMAGE_FORMAT_FIT: + fit_hdr = (const void *)addr; + puts ("Fit image detected...\n"); + + imsize = fit_get_size (fit_hdr); + break; +#endif + default: + puts ("** Unknown image type\n"); + return 1; + } + + nrofblk=imsize/512; + if((imsize%512)>0) + nrofblk++; + printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr); + pCMD->blnr=0; + if (fdc_read_data((unsigned char *)addr, nrofblk, pCMD, pFG) == false) { + /* read image block */ + printf("\nRead error:"); + for(i=0;i<7;i++) + printf("result%d: 0x%02X\n",i,pCMD->result[i]); + return 1; + } + printf("OK %ld Bytes loaded.\n",imsize); + + flush_cache (addr, imsize); + +#if defined(CONFIG_FIT) + /* This cannot be done earlier, we need complete FIT image in RAM first */ + if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) { + if (!fit_check_format (fit_hdr)) { + puts ("** Bad FIT image format\n"); + return 1; + } + fit_print_contents (fit_hdr); + } +#endif + + /* Loading ok, update default load address */ + load_addr = addr; + + return bootm_maybe_autostart(cmdtp, argv[0]); +} + +U_BOOT_CMD( + fdcboot, 3, 1, do_fdcboot, + "boot from floppy device", + "loadAddr drive" +); |
