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@@ -1,752 +0,0 @@
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-// SPDX-License-Identifier: GPL-2.0+
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-/*
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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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-/*
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- * Floppy Disk support
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- */
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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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-#include <irq_func.h>
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-
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-
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-#undef FDC_DEBUG
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-
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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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-
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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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-
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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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-
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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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-
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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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-
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-
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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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-
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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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-
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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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-
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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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-
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-
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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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-
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-
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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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-
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-static FDC_COMMAND_STRUCT cmd; /* global command struct */
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-
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-/* If the boot drive number is undefined, we assume it's drive 0 */
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-#ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
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-#define CONFIG_SYS_FDC_DRIVE_NUMBER 0
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-#endif
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-
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-/* Hardware access */
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-#ifndef CONFIG_SYS_ISA_IO_STRIDE
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-#define CONFIG_SYS_ISA_IO_STRIDE 1
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-#endif
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-
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-#ifndef CONFIG_SYS_ISA_IO_OFFSET
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-#define CONFIG_SYS_ISA_IO_OFFSET 0
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-#endif
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-
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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 *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
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- (addr * CONFIG_SYS_ISA_IO_STRIDE) +
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- CONFIG_SYS_ISA_IO_OFFSET);
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-
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- return val [0];
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-}
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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 *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
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- (addr * CONFIG_SYS_ISA_IO_STRIDE) +
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- CONFIG_SYS_ISA_IO_OFFSET);
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- tmp[0]=val;
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-}
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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((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 occurred */
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- return false;
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- }
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- return true;
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-}
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-
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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 occurred */
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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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-
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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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-
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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 occurred */
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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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-
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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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-
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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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-
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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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-
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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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-
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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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-
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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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-
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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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-
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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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-
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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
|
|
|
- * 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 occurred */
|
|
|
- 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 transferred: 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_LEGACY_IMAGE_FORMAT)
|
|
|
- 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_LEGACY_IMAGE_FORMAT)
|
|
|
- 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"
|
|
|
-);
|