mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
baa26db411
Signed-off-by: Jon Loeliger <jdl@freescale.com>
896 lines
24 KiB
C
896 lines
24 KiB
C
/*
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* (C) Copyright 2001
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* Denis Peter, MPL AG, d.peter@mpl.ch.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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/*
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* Floppy Disk support
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*/
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#include <common.h>
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#include <config.h>
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#include <command.h>
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#include <image.h>
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#undef FDC_DEBUG
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#ifdef FDC_DEBUG
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#define PRINTF(fmt,args...) printf (fmt ,##args)
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#else
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#define PRINTF(fmt,args...)
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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/*#if defined(CONFIG_CMD_DATE) */
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/*#include <rtc.h> */
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/*#endif */
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#if defined(CONFIG_CMD_FDC) || defined(CONFIG_CMD_FDOS)
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typedef struct {
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int flags; /* connected drives ect */
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unsigned long blnr; /* Logical block nr */
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uchar drive; /* drive no */
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uchar cmdlen; /* cmd length */
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uchar cmd[16]; /* cmd desc */
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uchar dma; /* if > 0 dma enabled */
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uchar result[11];/* status information */
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uchar resultlen; /* lenght of result */
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} FDC_COMMAND_STRUCT;
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/* flags: only the lower 8bit used:
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* bit 0 if set drive 0 is present
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* bit 1 if set drive 1 is present
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* bit 2 if set drive 2 is present
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* bit 3 if set drive 3 is present
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* bit 4 if set disk in drive 0 is inserted
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* bit 5 if set disk in drive 1 is inserted
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* bit 6 if set disk in drive 2 is inserted
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* bit 7 if set disk in drive 4 is inserted
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*/
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/* cmd indexes */
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#define COMMAND 0
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#define DRIVE 1
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#define CONFIG0 1
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#define SPEC_HUTSRT 1
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#define TRACK 2
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#define CONFIG1 2
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#define SPEC_HLT 2
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#define HEAD 3
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#define CONFIG2 3
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#define SECTOR 4
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#define SECTOR_SIZE 5
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#define LAST_TRACK 6
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#define GAP 7
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#define DTL 8
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/* result indexes */
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#define STATUS_0 0
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#define STATUS_PCN 1
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#define STATUS_1 1
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#define STATUS_2 2
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#define STATUS_TRACK 3
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#define STATUS_HEAD 4
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#define STATUS_SECT 5
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#define STATUS_SECT_SIZE 6
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/* Register addresses */
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#define FDC_BASE 0x3F0
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#define FDC_SRA FDC_BASE + 0 /* Status Register A */
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#define FDC_SRB FDC_BASE + 1 /* Status Register B */
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#define FDC_DOR FDC_BASE + 2 /* Digital Output Register */
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#define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */
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#define FDC_DSR FDC_BASE + 4 /* Data rate Register */
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#define FDC_MSR FDC_BASE + 4 /* Main Status Register */
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#define FDC_FIFO FDC_BASE + 5 /* FIFO */
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#define FDC_DIR FDC_BASE + 6 /* Digital Input Register */
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#define FDC_CCR FDC_BASE + 7 /* Configuration Control */
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/* Commands */
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#define FDC_CMD_SENSE_INT 0x08
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#define FDC_CMD_CONFIGURE 0x13
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#define FDC_CMD_SPECIFY 0x03
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#define FDC_CMD_RECALIBRATE 0x07
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#define FDC_CMD_READ 0x06
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#define FDC_CMD_READ_TRACK 0x02
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#define FDC_CMD_READ_ID 0x0A
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#define FDC_CMD_DUMP_REG 0x0E
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#define FDC_CMD_SEEK 0x0F
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#define FDC_CMD_SENSE_INT_LEN 0x01
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#define FDC_CMD_CONFIGURE_LEN 0x04
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#define FDC_CMD_SPECIFY_LEN 0x03
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#define FDC_CMD_RECALIBRATE_LEN 0x02
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#define FDC_CMD_READ_LEN 0x09
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#define FDC_CMD_READ_TRACK_LEN 0x09
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#define FDC_CMD_READ_ID_LEN 0x02
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#define FDC_CMD_DUMP_REG_LEN 0x01
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#define FDC_CMD_SEEK_LEN 0x03
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#define FDC_FIFO_THR 0x0C
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#define FDC_FIFO_DIS 0x00
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#define FDC_IMPLIED_SEEK 0x01
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#define FDC_POLL_DIS 0x00
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#define FDC_PRE_TRK 0x00
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#define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
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#define FDC_MFM_MODE 0x01 /* MFM enable */
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#define FDC_SKIP_MODE 0x00 /* skip enable */
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#define FDC_TIME_OUT 100000 /* time out */
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#define FDC_RW_RETRIES 3 /* read write retries */
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#define FDC_CAL_RETRIES 3 /* calibration and seek retries */
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/* Disk structure */
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typedef struct {
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unsigned int size; /* nr of sectors total */
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unsigned int sect; /* sectors per track */
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unsigned int head; /* nr of heads */
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unsigned int track; /* nr of tracks */
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unsigned int stretch; /* !=0 means double track steps */
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unsigned char gap; /* gap1 size */
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unsigned char rate; /* data rate. |= 0x40 for perpendicular */
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unsigned char spec1; /* stepping rate, head unload time */
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unsigned char fmt_gap; /* gap2 size */
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unsigned char hlt; /* head load time */
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unsigned char sect_code; /* Sector Size code */
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const char * name; /* used only for predefined formats */
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} FD_GEO_STRUCT;
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/* supported Floppy types (currently only one) */
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const static FD_GEO_STRUCT floppy_type[2] = {
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{ 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */
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{ 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */
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};
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static FDC_COMMAND_STRUCT cmd; /* global command struct */
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/* If the boot drive number is undefined, we assume it's drive 0 */
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#ifndef CFG_FDC_DRIVE_NUMBER
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#define CFG_FDC_DRIVE_NUMBER 0
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#endif
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/* Hardware access */
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#ifndef CFG_ISA_IO_STRIDE
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#define CFG_ISA_IO_STRIDE 1
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#endif
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#ifndef CFG_ISA_IO_OFFSET
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#define CFG_ISA_IO_OFFSET 0
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#endif
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#ifdef CONFIG_AMIGAONEG3SE
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unsigned char INT6_Status;
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void fdc_interrupt(void)
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{
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INT6_Status = 0x80;
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}
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/* waits for an interrupt (polling) */
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int wait_for_fdc_int(void)
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{
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unsigned long timeout;
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timeout = FDC_TIME_OUT;
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while(((volatile)INT6_Status & 0x80) == 0) {
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timeout--;
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udelay(10);
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if(timeout == 0) /* timeout occured */
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return FALSE;
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}
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INT6_Status = 0;
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return TRUE;
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}
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#endif
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/* Supporting Functions */
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/* reads a Register of the FDC */
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unsigned char read_fdc_reg(unsigned int addr)
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{
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volatile unsigned char *val =
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(volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS +
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(addr * CFG_ISA_IO_STRIDE) +
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CFG_ISA_IO_OFFSET);
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return val [0];
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}
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/* writes a Register of the FDC */
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void write_fdc_reg(unsigned int addr, unsigned char val)
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{
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volatile unsigned char *tmp =
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(volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS +
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(addr * CFG_ISA_IO_STRIDE) +
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CFG_ISA_IO_OFFSET);
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tmp[0]=val;
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}
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#ifndef CONFIG_AMIGAONEG3SE
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/* waits for an interrupt (polling) */
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int wait_for_fdc_int(void)
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{
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unsigned long timeout;
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timeout = FDC_TIME_OUT;
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while((read_fdc_reg(FDC_SRA)&0x80)==0) {
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timeout--;
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udelay(10);
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if(timeout==0) /* timeout occured */
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return FALSE;
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}
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return TRUE;
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}
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#endif
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/* reads a byte from the FIFO of the FDC and checks direction and RQM bit
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of the MSR. returns -1 if timeout, or byte if ok */
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int read_fdc_byte(void)
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{
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unsigned long timeout;
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timeout = FDC_TIME_OUT;
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while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
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/* direction out and ready */
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udelay(10);
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timeout--;
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if(timeout==0) /* timeout occured */
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return -1;
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}
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return read_fdc_reg(FDC_FIFO);
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}
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/* if the direction of the FIFO is wrong, this routine is used to
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empty the FIFO. Should _not_ be used */
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int fdc_need_more_output(void)
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{
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unsigned char c;
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while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) {
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c=(unsigned char)read_fdc_byte();
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printf("Error: more output: %x\n",c);
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}
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return TRUE;
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}
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/* writes a byte to the FIFO of the FDC and checks direction and RQM bit
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of the MSR */
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int write_fdc_byte(unsigned char val)
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{
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unsigned long timeout;
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timeout = FDC_TIME_OUT;
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while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
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/* direction in and ready for byte */
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timeout--;
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udelay(10);
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fdc_need_more_output();
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if(timeout==0) /* timeout occured */
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return FALSE;
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}
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write_fdc_reg(FDC_FIFO,val);
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return TRUE;
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}
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/* sets up all FDC commands and issues it to the FDC. If
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the command causes direct results (no Execution Phase)
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the result is be read as well. */
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int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
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{
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int i;
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unsigned long head,track,sect,timeout;
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track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
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sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
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head = sect / pFG->sect; /* head nr */
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sect = sect % pFG->sect; /* remaining blocks */
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sect++; /* sectors are 1 based */
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PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
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pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
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if(head|=0) { /* max heads = 2 */
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pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
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pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
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}
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else {
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pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
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pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
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}
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pCMD->cmd[TRACK]=(unsigned char) track; /* track */
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switch (pCMD->cmd[COMMAND]) {
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case FDC_CMD_READ:
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pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
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pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
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pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
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pCMD->cmd[GAP]=pFG->gap; /* gap */
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pCMD->cmd[DTL]=0xFF; /* DTL */
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pCMD->cmdlen=FDC_CMD_READ_LEN;
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pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
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pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
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pCMD->resultlen=0; /* result only after execution */
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break;
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case FDC_CMD_SEEK:
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pCMD->cmdlen=FDC_CMD_SEEK_LEN;
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pCMD->resultlen=0; /* no result */
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break;
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case FDC_CMD_CONFIGURE:
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pCMD->cmd[CONFIG0]=0;
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pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
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pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
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pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
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pCMD->resultlen=0; /* no result */
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break;
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case FDC_CMD_SPECIFY:
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pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
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pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
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if(pCMD->dma==0)
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pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
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pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
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pCMD->resultlen=0; /* no result */
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break;
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case FDC_CMD_DUMP_REG:
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pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
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pCMD->resultlen=10; /* 10 byte result */
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break;
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case FDC_CMD_READ_ID:
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pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
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pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
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pCMD->resultlen=7; /* 7 byte result */
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break;
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case FDC_CMD_RECALIBRATE:
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pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
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pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
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pCMD->resultlen=0; /* no result */
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break;
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break;
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case FDC_CMD_SENSE_INT:
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pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
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pCMD->resultlen=2;
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break;
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}
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for(i=0;i<pCMD->cmdlen;i++) {
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/* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
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if(write_fdc_byte(pCMD->cmd[i])==FALSE) {
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PRINTF("Error: timeout while issue cmd%d\n",i);
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return FALSE;
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}
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}
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timeout=FDC_TIME_OUT;
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for(i=0;i<pCMD->resultlen;i++) {
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while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
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timeout--;
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if(timeout==0) {
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PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
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return FALSE;
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}
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}
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pCMD->result[i]=(unsigned char)read_fdc_byte();
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}
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return TRUE;
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}
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/* selects the drive assigned in the cmd structur and
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switches on the Motor */
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void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
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{
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unsigned char val;
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val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
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if((read_fdc_reg(FDC_DOR)&val)!=val) {
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write_fdc_reg(FDC_DOR,val);
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for(val=0;val<255;val++)
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udelay(500); /* wait some time to start motor */
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}
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}
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/* switches off the Motor of the specified drive */
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void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
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{
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unsigned char val;
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val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
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write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
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}
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/* issues a recalibrate command, waits for interrupt and
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* issues a sense_interrupt */
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int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
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{
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pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
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if(fdc_issue_cmd(pCMD,pFG)==FALSE)
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return FALSE;
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while(wait_for_fdc_int()!=TRUE);
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pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
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return(fdc_issue_cmd(pCMD,pFG));
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}
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/* issues a recalibrate command, waits for interrupt and
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* issues a sense_interrupt */
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int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
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{
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pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
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if(fdc_issue_cmd(pCMD,pFG)==FALSE)
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return FALSE;
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while(wait_for_fdc_int()!=TRUE);
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pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
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return(fdc_issue_cmd(pCMD,pFG));
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}
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#ifndef CONFIG_AMIGAONEG3SE
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/* terminates current command, by not servicing the FIFO
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* waits for interrupt and fills in the result bytes */
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int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
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{
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int i;
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for(i=0;i<100;i++)
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udelay(500); /* wait 500usec for fifo overrun */
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while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */
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for(i=0;i<7;i++) {
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pCMD->result[i]=(unsigned char)read_fdc_byte();
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}
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return TRUE;
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}
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#endif
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#ifdef CONFIG_AMIGAONEG3SE
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int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
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{
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int i;
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for(i=0;i<100;i++)
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udelay(500); /* wait 500usec for fifo overrun */
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while((INT6_Status&0x80)==0x00); /* wait as long as no int has occured */
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for(i=0;i<7;i++) {
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pCMD->result[i]=(unsigned char)read_fdc_byte();
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}
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INT6_Status = 0;
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return TRUE;
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}
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#endif
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|
#ifdef CONFIG_AMIGAONEG3SE
|
|
#define disable_interrupts() 0
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#define enable_interrupts() (void)0
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#endif
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|
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/* reads data from FDC, seek commands are issued automatic */
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int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
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{
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/* first seek to start address */
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unsigned long len,lastblk,readblk,i,timeout,ii,offset;
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unsigned char pcn,c,retriesrw,retriescal;
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unsigned char *bufferw; /* working buffer */
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int sect_size;
|
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int flags;
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flags=disable_interrupts(); /* switch off all Interrupts */
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select_fdc_drive(pCMD); /* switch on drive */
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sect_size=0x080<<pFG->sect_code;
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retriesrw=0;
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retriescal=0;
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offset=0;
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if(fdc_seek(pCMD,pFG)==FALSE) {
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stop_fdc_drive(pCMD);
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enable_interrupts();
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return FALSE;
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}
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if((pCMD->result[STATUS_0]&0x20)!=0x20) {
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printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
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stop_fdc_drive(pCMD);
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enable_interrupts();
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return FALSE;
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}
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pcn=pCMD->result[STATUS_PCN]; /* current track */
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/* now determine the next seek point */
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lastblk=pCMD->blnr + blocks;
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/* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
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readblk=pFG->sect-(pCMD->blnr%pFG->sect);
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PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
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if(readblk>blocks) /* is end within 1st track */
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readblk=blocks; /* yes, correct it */
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PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
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bufferw=&buffer[0]; /* setup working buffer */
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do {
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retryrw:
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len=sect_size * readblk;
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pCMD->cmd[COMMAND]=FDC_CMD_READ;
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if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
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stop_fdc_drive(pCMD);
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enable_interrupts();
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return FALSE;
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}
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for (i=0;i<len;i++) {
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timeout=FDC_TIME_OUT;
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do {
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c=read_fdc_reg(FDC_MSR);
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if((c&0xC0)==0xC0) {
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bufferw[i]=read_fdc_reg(FDC_FIFO);
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break;
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}
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if((c&0xC0)==0x80) { /* output */
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PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c);
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if(i>6) {
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for(ii=0;ii<7;ii++) {
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pCMD->result[ii]=bufferw[(i-7+ii)];
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} /* for */
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}
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if(retriesrw++>FDC_RW_RETRIES) {
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if (retriescal++>FDC_CAL_RETRIES) {
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stop_fdc_drive(pCMD);
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enable_interrupts();
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return FALSE;
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}
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else {
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PRINTF(" trying to recalibrate Try %d\n",retriescal);
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if(fdc_recalibrate(pCMD,pFG)==FALSE) {
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stop_fdc_drive(pCMD);
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enable_interrupts();
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return FALSE;
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}
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retriesrw=0;
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goto retrycal;
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} /* else >FDC_CAL_RETRIES */
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}
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else {
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PRINTF("Read retry %d\n",retriesrw);
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goto retryrw;
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} /* else >FDC_RW_RETRIES */
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}/* if output */
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timeout--;
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}while(TRUE);
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} /* for len */
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/* the last sector of a track or all data has been read,
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* we need to get the results */
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fdc_terminate(pCMD);
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offset+=(sect_size*readblk); /* set up buffer pointer */
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bufferw=&buffer[offset];
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pCMD->blnr+=readblk; /* update current block nr */
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blocks-=readblk; /* update blocks */
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if(blocks==0)
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break; /* we are finish */
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/* setup new read blocks */
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/* readblk=pFG->head*pFG->sect; */
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readblk=pFG->sect;
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if(readblk>blocks)
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readblk=blocks;
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retrycal:
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/* a seek is necessary */
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if(fdc_seek(pCMD,pFG)==FALSE) {
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stop_fdc_drive(pCMD);
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enable_interrupts();
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return FALSE;
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}
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if((pCMD->result[STATUS_0]&0x20)!=0x20) {
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PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
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stop_fdc_drive(pCMD);
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return FALSE;
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}
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pcn=pCMD->result[STATUS_PCN]; /* current track */
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}while(TRUE); /* start over */
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stop_fdc_drive(pCMD); /* switch off drive */
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enable_interrupts();
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return TRUE;
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}
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#ifdef CONFIG_AMIGAONEG3SE
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#undef disable_interrupts()
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#undef enable_interrupts()
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#endif
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/* Scan all drives and check if drive is present and disk is inserted */
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int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
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{
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int i,drives,state;
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/* OK procedure of data book is satisfied.
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* trying to get some information over the drives */
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state=0; /* no drives, no disks */
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for(drives=0;drives<4;drives++) {
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pCMD->drive=drives;
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select_fdc_drive(pCMD);
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pCMD->blnr=0; /* set to the 1st block */
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if(fdc_recalibrate(pCMD,pFG)==FALSE)
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continue;
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if((pCMD->result[STATUS_0]&0x10)==0x10)
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continue;
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/* ok drive connected check for disk */
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state|=(1<<drives);
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pCMD->blnr=pFG->size; /* set to the last block */
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if(fdc_seek(pCMD,pFG)==FALSE)
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continue;
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pCMD->blnr=0; /* set to the 1st block */
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if(fdc_recalibrate(pCMD,pFG)==FALSE)
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continue;
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pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
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if(fdc_issue_cmd(pCMD,pFG)==FALSE)
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continue;
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state|=(0x10<<drives);
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}
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stop_fdc_drive(pCMD);
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for(i=0;i<4;i++) {
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PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
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((state&(1<<i))==(1<<i)) ? "":"not ",
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((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
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((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
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}
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pCMD->flags=state;
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return TRUE;
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}
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/**************************************************************************
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* int fdc_setup
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* setup the fdc according the datasheet
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* assuming in PS2 Mode
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*/
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int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
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{
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int i;
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#ifdef CONFIG_AMIGAONEG3SE
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irq_install_handler(6, (interrupt_handler_t *)fdc_interrupt, NULL);
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i8259_unmask_irq(6);
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#endif
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#ifdef CFG_FDC_HW_INIT
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fdc_hw_init ();
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#endif
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/* first, we reset the FDC via the DOR */
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write_fdc_reg(FDC_DOR,0x00);
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for(i=0; i<255; i++) /* then we wait some time */
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udelay(500);
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/* then, we clear the reset in the DOR */
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pCMD->drive=drive;
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select_fdc_drive(pCMD);
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/* initialize the CCR */
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write_fdc_reg(FDC_CCR,pFG->rate);
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/* then initialize the DSR */
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write_fdc_reg(FDC_DSR,pFG->rate);
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if(wait_for_fdc_int()==FALSE) {
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PRINTF("Time Out after writing CCR\n");
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return FALSE;
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}
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/* now issue sense Interrupt and status command
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* assuming only one drive present (drive 0) */
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pCMD->dma=0; /* we don't use any dma at all */
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for(i=0;i<4;i++) {
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/* issue sense interrupt for all 4 possible drives */
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pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
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if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
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PRINTF("Sense Interrupt for drive %d failed\n",i);
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}
|
|
}
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/* issue the configure command */
|
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pCMD->drive=drive;
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select_fdc_drive(pCMD);
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pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
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|
if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
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|
PRINTF(" configure timeout\n");
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|
stop_fdc_drive(pCMD);
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return FALSE;
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}
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/* issue specify command */
|
|
pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
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if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
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|
PRINTF(" specify timeout\n");
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|
stop_fdc_drive(pCMD);
|
|
return FALSE;
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|
|
|
}
|
|
/* then, we clear the reset in the DOR */
|
|
/* fdc_check_drive(pCMD,pFG); */
|
|
/* write_fdc_reg(FDC_DOR,0x04); */
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|
|
|
return TRUE;
|
|
}
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|
#endif
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|
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#if defined(CONFIG_CMD_FDOS)
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|
|
|
/* Low level functions for the Floppy-DOS layer */
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|
|
|
/**************************************************************************
|
|
* 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;
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|
|
|
/* 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
|
|
|
|
#if defined(CONFIG_CMD_FDC)
|
|
/****************************************************************************
|
|
* main routine do_fdcboot
|
|
*/
|
|
int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|
{
|
|
FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
|
|
FDC_COMMAND_STRUCT *pCMD = &cmd;
|
|
unsigned long addr,imsize;
|
|
image_header_t *hdr; /* used for fdc boot */
|
|
unsigned char boot_drive;
|
|
int i,nrofblk;
|
|
char *ep;
|
|
int rcode = 0;
|
|
|
|
switch (argc) {
|
|
case 1:
|
|
addr = CFG_LOAD_ADDR;
|
|
boot_drive=CFG_FDC_DRIVE_NUMBER;
|
|
break;
|
|
case 2:
|
|
addr = simple_strtoul(argv[1], NULL, 16);
|
|
boot_drive=CFG_FDC_DRIVE_NUMBER;
|
|
break;
|
|
case 3:
|
|
addr = simple_strtoul(argv[1], NULL, 16);
|
|
boot_drive=simple_strtoul(argv[2], NULL, 10);
|
|
break;
|
|
default:
|
|
printf ("Usage:\n%s\n", cmdtp->usage);
|
|
return 1;
|
|
}
|
|
/* 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;
|
|
}
|
|
hdr = (image_header_t *)addr;
|
|
if (ntohl(hdr->ih_magic) != IH_MAGIC) {
|
|
printf ("Bad Magic Number\n");
|
|
return 1;
|
|
}
|
|
print_image_hdr(hdr);
|
|
|
|
imsize= ntohl(hdr->ih_size)+sizeof(image_header_t);
|
|
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);
|
|
/* Loading ok, update default load address */
|
|
|
|
load_addr = addr;
|
|
if(hdr->ih_type == IH_TYPE_KERNEL) {
|
|
/* Check if we should attempt an auto-start */
|
|
if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
|
|
char *local_args[2];
|
|
extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
|
|
|
|
local_args[0] = argv[0];
|
|
local_args[1] = NULL;
|
|
|
|
printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
|
|
|
|
do_bootm (cmdtp, 0, 1, local_args);
|
|
rcode ++;
|
|
}
|
|
}
|
|
return rcode;
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
/***************************************************/
|
|
|
|
|
|
#if defined(CONFIG_CMD_FDC)
|
|
|
|
U_BOOT_CMD(
|
|
fdcboot, 3, 1, do_fdcboot,
|
|
"fdcboot - boot from floppy device\n",
|
|
"loadAddr drive\n"
|
|
);
|
|
#endif
|