patch-2.3.99-pre1 linux/drivers/block/ide-floppy.c
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- Lines: 1681
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.51/linux/drivers/block/ide-floppy.c
- Orig date:
Sat Feb 26 22:31:43 2000
diff -u --recursive --new-file v2.3.51/linux/drivers/block/ide-floppy.c linux/drivers/block/ide-floppy.c
@@ -1,1680 +0,0 @@
-/*
- * linux/drivers/block/ide-floppy.c Version 0.9 Jul 4, 1999
- *
- * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
- */
-
-/*
- * IDE ATAPI floppy driver.
- *
- * The driver currently doesn't have any fancy features, just the bare
- * minimum read/write support.
- *
- * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
- * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
- *
- * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
- * Ver 0.2 Oct 31 96 Minor changes.
- * Ver 0.3 Dec 2 96 Fixed error recovery bug.
- * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
- * Ver 0.5 Feb 21 97 Add partitions support.
- * Use the minimum of the LBA and CHS capacities.
- * Avoid hwgroup->rq == NULL on the last irq.
- * Fix potential null dereferencing with DEBUG_LOG.
- * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
- * Add media write-protect detection.
- * Issue START command only if TEST UNIT READY fails.
- * Add work-around for IOMEGA ZIP revision 21.D.
- * Remove idefloppy_get_capabilities().
- * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
- * bytes requested on each interrupt to be zero.
- * Thanks to <shanos@es.co.nz> for pointing this out.
- */
-
-#define IDEFLOPPY_VERSION "0.9"
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/major.h>
-#include <linux/errno.h>
-#include <linux/genhd.h>
-#include <linux/malloc.h>
-#include <linux/cdrom.h>
-#include <linux/ide.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/unaligned.h>
-#include <asm/bitops.h>
-
-/*
- * The following are used to debug the driver.
- */
-#define IDEFLOPPY_DEBUG_LOG 0
-#define IDEFLOPPY_DEBUG_INFO 0
-#define IDEFLOPPY_DEBUG_BUGS 1
-
-/*
- * Some drives require a longer irq timeout.
- */
-#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
-
-/*
- * After each failed packet command we issue a request sense command
- * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
- */
-#define IDEFLOPPY_MAX_PC_RETRIES 3
-
-/*
- * With each packet command, we allocate a buffer of
- * IDEFLOPPY_PC_BUFFER_SIZE bytes.
- */
-#define IDEFLOPPY_PC_BUFFER_SIZE 256
-
-/*
- * In various places in the driver, we need to allocate storage
- * for packet commands and requests, which will remain valid while
- * we leave the driver to wait for an interrupt or a timeout event.
- */
-#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
-
-/*
- * Our view of a packet command.
- */
-typedef struct idefloppy_packet_command_s {
- u8 c[12]; /* Actual packet bytes */
- int retries; /* On each retry, we increment retries */
- int error; /* Error code */
- int request_transfer; /* Bytes to transfer */
- int actually_transferred; /* Bytes actually transferred */
- int buffer_size; /* Size of our data buffer */
- char *b_data; /* Pointer which runs on the buffers */
- int b_count; /* Missing/Available data on the current buffer */
- struct request *rq; /* The corresponding request */
- byte *buffer; /* Data buffer */
- byte *current_position; /* Pointer into the above buffer */
- void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
- byte pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
- unsigned int flags; /* Status/Action bit flags */
-} idefloppy_pc_t;
-
-/*
- * Packet command flag bits.
- */
-#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
-#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
-#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
-#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
-#define PC_WRITING 5 /* Data direction */
-
-/*
- * Removable Block Access Capabilities Page
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned page_code :6; /* Page code - Should be 0x1b */
- unsigned reserved1_6 :1; /* Reserved */
- unsigned ps :1; /* Should be 0 */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned ps :1; /* Should be 0 */
- unsigned reserved1_6 :1; /* Reserved */
- unsigned page_code :6; /* Page code - Should be 0x1b */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u8 page_length; /* Page Length - Should be 0xa */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned reserved2 :6;
- unsigned srfp :1; /* Supports reporting progress of format */
- unsigned sflp :1; /* System floppy type device */
- unsigned tlun :3; /* Total logical units supported by the device */
- unsigned reserved3 :3;
- unsigned sml :1; /* Single / Multiple lun supported */
- unsigned ncd :1; /* Non cd optical device */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned sflp :1; /* System floppy type device */
- unsigned srfp :1; /* Supports reporting progress of format */
- unsigned reserved2 :6;
- unsigned ncd :1; /* Non cd optical device */
- unsigned sml :1; /* Single / Multiple lun supported */
- unsigned reserved3 :3;
- unsigned tlun :3; /* Total logical units supported by the device */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u8 reserved[8];
-} idefloppy_capabilities_page_t;
-
-/*
- * Flexible disk page.
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned page_code :6; /* Page code - Should be 0x5 */
- unsigned reserved1_6 :1; /* Reserved */
- unsigned ps :1; /* The device is capable of saving the page */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned ps :1; /* The device is capable of saving the page */
- unsigned reserved1_6 :1; /* Reserved */
- unsigned page_code :6; /* Page code - Should be 0x5 */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u8 page_length; /* Page Length - Should be 0x1e */
- u16 transfer_rate; /* In kilobits per second */
- u8 heads, sectors; /* Number of heads, Number of sectors per track */
- u16 sector_size; /* Byes per sector */
- u16 cyls; /* Number of cylinders */
- u8 reserved10[10];
- u8 motor_delay; /* Motor off delay */
- u8 reserved21[7];
- u16 rpm; /* Rotations per minute */
- u8 reserved30[2];
-} idefloppy_flexible_disk_page_t;
-
-/*
- * Format capacity
- */
-typedef struct {
- u8 reserved[3];
- u8 length; /* Length of the following descriptors in bytes */
-} idefloppy_capacity_header_t;
-
-typedef struct {
- u32 blocks; /* Number of blocks */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned dc :2; /* Descriptor Code */
- unsigned reserved :6;
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned reserved :6;
- unsigned dc :2; /* Descriptor Code */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u8 length_msb; /* Block Length (MSB)*/
- u16 length; /* Block Length */
-} idefloppy_capacity_descriptor_t;
-
-#define CAPACITY_INVALID 0x00
-#define CAPACITY_UNFORMATTED 0x01
-#define CAPACITY_CURRENT 0x02
-#define CAPACITY_NO_CARTRIDGE 0x03
-
-/*
- * Most of our global data which we need to save even as we leave the
- * driver due to an interrupt or a timer event is stored in a variable
- * of type idefloppy_floppy_t, defined below.
- */
-typedef struct {
- ide_drive_t *drive;
-
- idefloppy_pc_t *pc; /* Current packet command */
- idefloppy_pc_t *failed_pc; /* Last failed packet command */
- idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];/* Packet command stack */
- int pc_stack_index; /* Next free packet command storage space */
- struct request rq_stack[IDEFLOPPY_PC_STACK];
- int rq_stack_index; /* We implement a circular array */
-
- /*
- * Last error information
- */
- byte sense_key, asc, ascq;
-
- /*
- * Device information
- */
- int blocks, block_size, bs_factor; /* Current format */
- idefloppy_capacity_descriptor_t capacity; /* Last format capacity */
- idefloppy_flexible_disk_page_t flexible_disk_page; /* Copy of the flexible disk page */
- int wp; /* Write protect */
-
- unsigned int flags; /* Status/Action flags */
-} idefloppy_floppy_t;
-
-/*
- * Floppy flag bits values.
- */
-#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
-#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
-#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
-
-/*
- * ATAPI floppy drive packet commands
- */
-#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
-#define IDEFLOPPY_INQUIRY_CMD 0x12
-#define IDEFLOPPY_MODE_SELECT_CMD 0x55
-#define IDEFLOPPY_MODE_SENSE_CMD 0x5a
-#define IDEFLOPPY_READ10_CMD 0x28
-#define IDEFLOPPY_READ12_CMD 0xa8
-#define IDEFLOPPY_READ_CAPACITY_CMD 0x23
-#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
-#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
-#define IDEFLOPPY_SEEK_CMD 0x2b
-#define IDEFLOPPY_START_STOP_CMD 0x1b
-#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
-#define IDEFLOPPY_VERIFY_CMD 0x2f
-#define IDEFLOPPY_WRITE10_CMD 0x2a
-#define IDEFLOPPY_WRITE12_CMD 0xaa
-#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
-
-/*
- * Defines for the mode sense command
- */
-#define MODE_SENSE_CURRENT 0x00
-#define MODE_SENSE_CHANGEABLE 0x01
-#define MODE_SENSE_DEFAULT 0x02
-#define MODE_SENSE_SAVED 0x03
-
-/*
- * Special requests for our block device strategy routine.
- */
-#define IDEFLOPPY_FIRST_RQ 90
-
-/*
- * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
- */
-#define IDEFLOPPY_PC_RQ 90
-
-#define IDEFLOPPY_LAST_RQ 90
-
-/*
- * A macro which can be used to check if a given request command
- * originated in the driver or in the buffer cache layer.
- */
-#define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
-
-/*
- * Error codes which are returned in rq->errors to the higher part
- * of the driver.
- */
-#define IDEFLOPPY_ERROR_GENERAL 101
-
-/*
- * The ATAPI Status Register.
- */
-typedef union {
- unsigned all :8;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned check :1; /* Error occurred */
- unsigned idx :1; /* Reserved */
- unsigned corr :1; /* Correctable error occurred */
- unsigned drq :1; /* Data is request by the device */
- unsigned dsc :1; /* Media access command finished */
- unsigned reserved5 :1; /* Reserved */
- unsigned drdy :1; /* Ignored for ATAPI commands (ready to accept ATA command) */
- unsigned bsy :1; /* The device has access to the command block */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned bsy :1; /* The device has access to the command block */
- unsigned drdy :1; /* Ignored for ATAPI commands (ready to accept ATA command) */
- unsigned reserved5 :1; /* Reserved */
- unsigned dsc :1; /* Media access command finished */
- unsigned drq :1; /* Data is request by the device */
- unsigned corr :1; /* Correctable error occurred */
- unsigned idx :1; /* Reserved */
- unsigned check :1; /* Error occurred */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_status_reg_t;
-
-/*
- * The ATAPI error register.
- */
-typedef union {
- unsigned all :8;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned ili :1; /* Illegal Length Indication */
- unsigned eom :1; /* End Of Media Detected */
- unsigned abrt :1; /* Aborted command - As defined by ATA */
- unsigned mcr :1; /* Media Change Requested - As defined by ATA */
- unsigned sense_key :4; /* Sense key of the last failed packet command */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned sense_key :4; /* Sense key of the last failed packet command */
- unsigned mcr :1; /* Media Change Requested - As defined by ATA */
- unsigned abrt :1; /* Aborted command - As defined by ATA */
- unsigned eom :1; /* End Of Media Detected */
- unsigned ili :1; /* Illegal Length Indication */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_error_reg_t;
-
-/*
- * ATAPI Feature Register
- */
-typedef union {
- unsigned all :8;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned dma :1; /* Using DMA or PIO */
- unsigned reserved321 :3; /* Reserved */
- unsigned reserved654 :3; /* Reserved (Tag Type) */
- unsigned reserved7 :1; /* Reserved */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned reserved7 :1; /* Reserved */
- unsigned reserved654 :3; /* Reserved (Tag Type) */
- unsigned reserved321 :3; /* Reserved */
- unsigned dma :1; /* Using DMA or PIO */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_feature_reg_t;
-
-/*
- * ATAPI Byte Count Register.
- */
-typedef union {
- unsigned all :16;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned low :8; /* LSB */
- unsigned high :8; /* MSB */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned high :8; /* MSB */
- unsigned low :8; /* LSB */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_bcount_reg_t;
-
-/*
- * ATAPI Interrupt Reason Register.
- */
-typedef union {
- unsigned all :8;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned cod :1; /* Information transferred is command (1) or data (0) */
- unsigned io :1; /* The device requests us to read (1) or write (0) */
- unsigned reserved :6; /* Reserved */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned reserved :6; /* Reserved */
- unsigned io :1; /* The device requests us to read (1) or write (0) */
- unsigned cod :1; /* Information transferred is command (1) or data (0) */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_ireason_reg_t;
-
-/*
- * ATAPI floppy Drive Select Register
- */
-typedef union {
- unsigned all :8;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned sam_lun :3; /* Logical unit number */
- unsigned reserved3 :1; /* Reserved */
- unsigned drv :1; /* The responding drive will be drive 0 (0) or drive 1 (1) */
- unsigned one5 :1; /* Should be set to 1 */
- unsigned reserved6 :1; /* Reserved */
- unsigned one7 :1; /* Should be set to 1 */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned one7 :1; /* Should be set to 1 */
- unsigned reserved6 :1; /* Reserved */
- unsigned one5 :1; /* Should be set to 1 */
- unsigned drv :1; /* The responding drive will be drive 0 (0) or drive 1 (1) */
- unsigned reserved3 :1; /* Reserved */
- unsigned sam_lun :3; /* Logical unit number */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_drivesel_reg_t;
-
-/*
- * ATAPI Device Control Register
- */
-typedef union {
- unsigned all :8;
- struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned zero0 :1; /* Should be set to zero */
- unsigned nien :1; /* Device interrupt is disabled (1) or enabled (0) */
- unsigned srst :1; /* ATA software reset. ATAPI devices should use the new ATAPI srst. */
- unsigned one3 :1; /* Should be set to 1 */
- unsigned reserved4567 :4; /* Reserved */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned reserved4567 :4; /* Reserved */
- unsigned one3 :1; /* Should be set to 1 */
- unsigned srst :1; /* ATA software reset. ATAPI devices should use the new ATAPI srst. */
- unsigned nien :1; /* Device interrupt is disabled (1) or enabled (0) */
- unsigned zero0 :1; /* Should be set to zero */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- } b;
-} idefloppy_control_reg_t;
-
-/*
- * The following is used to format the general configuration word of
- * the ATAPI IDENTIFY DEVICE command.
- */
-struct idefloppy_id_gcw {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned packet_size :2; /* Packet Size */
- unsigned reserved234 :3; /* Reserved */
- unsigned drq_type :2; /* Command packet DRQ type */
- unsigned removable :1; /* Removable media */
- unsigned device_type :5; /* Device type */
- unsigned reserved13 :1; /* Reserved */
- unsigned protocol :2; /* Protocol type */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned protocol :2; /* Protocol type */
- unsigned reserved13 :1; /* Reserved */
- unsigned device_type :5; /* Device type */
- unsigned removable :1; /* Removable media */
- unsigned drq_type :2; /* Command packet DRQ type */
- unsigned reserved234 :3; /* Reserved */
- unsigned packet_size :2; /* Packet Size */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-};
-
-/*
- * INQUIRY packet command - Data Format
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned device_type :5; /* Peripheral Device Type */
- unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
- unsigned reserved1_6t0 :7; /* Reserved */
- unsigned rmb :1; /* Removable Medium Bit */
- unsigned ansi_version :3; /* ANSI Version */
- unsigned ecma_version :3; /* ECMA Version */
- unsigned iso_version :2; /* ISO Version */
- unsigned response_format :4; /* Response Data Format */
- unsigned reserved3_45 :2; /* Reserved */
- unsigned reserved3_6 :1; /* TrmIOP - Reserved */
- unsigned reserved3_7 :1; /* AENC - Reserved */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
- unsigned device_type :5; /* Peripheral Device Type */
- unsigned rmb :1; /* Removable Medium Bit */
- unsigned reserved1_6t0 :7; /* Reserved */
- unsigned iso_version :2; /* ISO Version */
- unsigned ecma_version :3; /* ECMA Version */
- unsigned ansi_version :3; /* ANSI Version */
- unsigned reserved3_7 :1; /* AENC - Reserved */
- unsigned reserved3_6 :1; /* TrmIOP - Reserved */
- unsigned reserved3_45 :2; /* Reserved */
- unsigned response_format :4; /* Response Data Format */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u8 additional_length; /* Additional Length (total_length-4) */
- u8 rsv5, rsv6, rsv7; /* Reserved */
- u8 vendor_id[8]; /* Vendor Identification */
- u8 product_id[16]; /* Product Identification */
- u8 revision_level[4]; /* Revision Level */
- u8 vendor_specific[20]; /* Vendor Specific - Optional */
- u8 reserved56t95[40]; /* Reserved - Optional */
- /* Additional information may be returned */
-} idefloppy_inquiry_result_t;
-
-/*
- * REQUEST SENSE packet command result - Data Format.
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned error_code :7; /* Current error (0x70) */
- unsigned valid :1; /* The information field conforms to SFF-8070i */
- u8 reserved1 :8; /* Reserved */
- unsigned sense_key :4; /* Sense Key */
- unsigned reserved2_4 :1; /* Reserved */
- unsigned ili :1; /* Incorrect Length Indicator */
- unsigned reserved2_67 :2;
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned valid :1; /* The information field conforms to SFF-8070i */
- unsigned error_code :7; /* Current error (0x70) */
- u8 reserved1 :8; /* Reserved */
- unsigned reserved2_67 :2;
- unsigned ili :1; /* Incorrect Length Indicator */
- unsigned reserved2_4 :1; /* Reserved */
- unsigned sense_key :4; /* Sense Key */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u32 information __attribute__ ((packed));
- u8 asl; /* Additional sense length (n-7) */
- u32 command_specific; /* Additional command specific information */
- u8 asc; /* Additional Sense Code */
- u8 ascq; /* Additional Sense Code Qualifier */
- u8 replaceable_unit_code; /* Field Replaceable Unit Code */
- u8 reserved[3];
- u8 pad[2]; /* Padding to 20 bytes */
-} idefloppy_request_sense_result_t;
-
-/*
- * Pages of the SELECT SENSE / MODE SENSE packet commands.
- */
-#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
-#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
-
-/*
- * Mode Parameter Header for the MODE SENSE packet command
- */
-typedef struct {
- u16 mode_data_length; /* Length of the following data transfer */
- u8 medium_type; /* Medium Type */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- unsigned reserved3 :7;
- unsigned wp :1; /* Write protect */
-#elif defined(__BIG_ENDIAN_BITFIELD)
- unsigned wp :1; /* Write protect */
- unsigned reserved3 :7;
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
- u8 reserved[4];
-} idefloppy_mode_parameter_header_t;
-
-#define IDEFLOPPY_MIN(a,b) ((a)<(b) ? (a):(b))
-#define IDEFLOPPY_MAX(a,b) ((a)>(b) ? (a):(b))
-
-/*
- * Too bad. The drive wants to send us data which we are not ready to accept.
- * Just throw it away.
- */
-static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
-{
- while (bcount--)
- IN_BYTE (IDE_DATA_REG);
-}
-
-#if IDEFLOPPY_DEBUG_BUGS
-static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
-{
- while (bcount--)
- OUT_BYTE (0, IDE_DATA_REG);
-}
-#endif /* IDEFLOPPY_DEBUG_BUGS */
-
-/*
- * idefloppy_end_request is used to finish servicing a request.
- *
- * For read/write requests, we will call ide_end_request to pass to the
- * next buffer.
- */
-static void idefloppy_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
-{
- ide_drive_t *drive = hwgroup->drive;
- idefloppy_floppy_t *floppy = drive->driver_data;
- struct request *rq = hwgroup->rq;
- int error;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "Reached idefloppy_end_request\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- switch (uptodate) {
- case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
- case 1: error = 0; break;
- default: error = uptodate;
- }
- if (error)
- floppy->failed_pc = NULL;
- /* Why does this happen? */
- if (!rq)
- return;
- if (!IDEFLOPPY_RQ_CMD (rq->cmd)) {
- ide_end_request (uptodate, hwgroup);
- return;
- }
- rq->errors = error;
- ide_end_drive_cmd (drive, 0, 0);
-}
-
-static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
-{
- struct request *rq = pc->rq;
- struct buffer_head *bh = rq->bh;
- int count;
-
- while (bcount) {
- if (pc->b_count == bh->b_size) {
- rq->sector += rq->current_nr_sectors;
- rq->nr_sectors -= rq->current_nr_sectors;
- idefloppy_end_request (1, HWGROUP(drive));
- if ((bh = rq->bh) != NULL)
- pc->b_count = 0;
- }
- if (bh == NULL) {
- printk (KERN_ERR "%s: bh == NULL in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
- idefloppy_discard_data (drive, bcount);
- return;
- }
- count = IDEFLOPPY_MIN (bh->b_size - pc->b_count, bcount);
- atapi_input_bytes (drive, bh->b_data + pc->b_count, count);
- bcount -= count; pc->b_count += count;
- }
-}
-
-static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
-{
- struct request *rq = pc->rq;
- struct buffer_head *bh = rq->bh;
- int count;
-
- while (bcount) {
- if (!pc->b_count) {
- rq->sector += rq->current_nr_sectors;
- rq->nr_sectors -= rq->current_nr_sectors;
- idefloppy_end_request (1, HWGROUP(drive));
- if ((bh = rq->bh) != NULL) {
- pc->b_data = bh->b_data;
- pc->b_count = bh->b_size;
- }
- }
- if (bh == NULL) {
- printk (KERN_ERR "%s: bh == NULL in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
- idefloppy_write_zeros (drive, bcount);
- return;
- }
- count = IDEFLOPPY_MIN (pc->b_count, bcount);
- atapi_output_bytes (drive, pc->b_data, count);
- bcount -= count; pc->b_data += count; pc->b_count -= count;
- }
-}
-
-#ifdef CONFIG_BLK_DEV_IDEDMA
-static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
-{
- struct request *rq = pc->rq;
- struct buffer_head *bh = rq->bh;
-
- while ((bh = rq->bh) != NULL)
- idefloppy_end_request (1, HWGROUP(drive));
-}
-#endif /* CONFIG_BLK_DEV_IDEDMA */
-
-/*
- * idefloppy_queue_pc_head generates a new packet command request in front
- * of the request queue, before the current request, so that it will be
- * processed immediately, on the next pass through the driver.
- */
-static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
-{
- ide_init_drive_cmd (rq);
- rq->buffer = (char *) pc;
- rq->cmd = IDEFLOPPY_PC_RQ;
- (void) ide_do_drive_cmd (drive, rq, ide_preempt);
-}
-
-static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- if (floppy->pc_stack_index==IDEFLOPPY_PC_STACK)
- floppy->pc_stack_index=0;
- return (&floppy->pc_stack[floppy->pc_stack_index++]);
-}
-
-static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- if (floppy->rq_stack_index==IDEFLOPPY_PC_STACK)
- floppy->rq_stack_index=0;
- return (&floppy->rq_stack[floppy->rq_stack_index++]);
-}
-
-/*
- * idefloppy_analyze_error is called on each failed packet command retry
- * to analyze the request sense.
- */
-static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- floppy->sense_key = result->sense_key; floppy->asc = result->asc; floppy->ascq = result->ascq;
-#if IDEFLOPPY_DEBUG_LOG
- if (floppy->failed_pc)
- printk (KERN_INFO "ide-floppy: pc = %x, sense key = %x, asc = %x, ascq = %x\n",floppy->failed_pc->c[0],result->sense_key,result->asc,result->ascq);
- else
- printk (KERN_INFO "ide-floppy: sense key = %x, asc = %x, ascq = %x\n",result->sense_key,result->asc,result->ascq);
-#endif /* IDEFLOPPY_DEBUG_LOG */
-}
-
-static void idefloppy_request_sense_callback (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: Reached idefloppy_request_sense_callback\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
- if (!floppy->pc->error) {
- idefloppy_analyze_error (drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
- idefloppy_end_request (1,HWGROUP (drive));
- } else {
- printk (KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
- idefloppy_end_request (0,HWGROUP (drive));
- }
-}
-
-/*
- * General packet command callback function.
- */
-static void idefloppy_pc_callback (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: Reached idefloppy_pc_callback\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- idefloppy_end_request (floppy->pc->error ? 0:1, HWGROUP(drive));
-}
-
-/*
- * idefloppy_init_pc initializes a packet command.
- */
-static void idefloppy_init_pc (idefloppy_pc_t *pc)
-{
- memset (pc->c, 0, 12);
- pc->retries = 0;
- pc->flags = 0;
- pc->request_transfer = 0;
- pc->buffer = pc->pc_buffer;
- pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
- pc->b_data = NULL;
- pc->callback = &idefloppy_pc_callback;
-}
-
-static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
-{
- idefloppy_init_pc (pc);
- pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
- pc->c[4] = 255;
- pc->request_transfer = 18;
- pc->callback = &idefloppy_request_sense_callback;
-}
-
-/*
- * idefloppy_retry_pc is called when an error was detected during the
- * last packet command. We queue a request sense packet command in
- * the head of the request list.
- */
-static void idefloppy_retry_pc (ide_drive_t *drive)
-{
- idefloppy_pc_t *pc;
- struct request *rq;
- idefloppy_error_reg_t error;
-
- error.all = IN_BYTE (IDE_ERROR_REG);
- pc = idefloppy_next_pc_storage (drive);
- rq = idefloppy_next_rq_storage (drive);
- idefloppy_create_request_sense_cmd (pc);
- idefloppy_queue_pc_head (drive, pc, rq);
-}
-
-/*
- * idefloppy_pc_intr is the usual interrupt handler which will be called
- * during a packet command.
- */
-static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_status_reg_t status;
- idefloppy_bcount_reg_t bcount;
- idefloppy_ireason_reg_t ireason;
- idefloppy_pc_t *pc=floppy->pc;
- struct request *rq = pc->rq;
- unsigned int temp;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: Reached idefloppy_pc_intr interrupt handler\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
-#ifdef CONFIG_BLK_DEV_IDEDMA
- if (test_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
- if (HWIF(drive)->dmaproc(ide_dma_end, drive)) {
- set_bit (PC_DMA_ERROR, &pc->flags);
- } else {
- pc->actually_transferred=pc->request_transfer;
- idefloppy_update_buffers (drive, pc);
- }
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: DMA finished\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
- }
-#endif /* CONFIG_BLK_DEV_IDEDMA */
-
- status.all = GET_STAT(); /* Clear the interrupt */
-
- if (!status.b.drq) { /* No more interrupts */
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred);
-#endif /* IDEFLOPPY_DEBUG_LOG */
- clear_bit (PC_DMA_IN_PROGRESS, &pc->flags);
-
- ide__sti(); /* local CPU only */
-
- if (status.b.check || test_bit (PC_DMA_ERROR, &pc->flags)) { /* Error detected */
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: %s: I/O error\n",drive->name);
-#endif /* IDEFLOPPY_DEBUG_LOG */
- rq->errors++;
- if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
- printk (KERN_ERR "ide-floppy: I/O error in request sense command\n");
- return ide_do_reset (drive);
- }
- idefloppy_retry_pc (drive); /* Retry operation */
- return ide_stopped; /* queued, but not started */
- }
- pc->error = 0;
- if (floppy->failed_pc == pc)
- floppy->failed_pc=NULL;
- pc->callback(drive); /* Command finished - Call the callback function */
- return ide_stopped;
- }
-#ifdef CONFIG_BLK_DEV_IDEDMA
- if (test_and_clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
- printk (KERN_ERR "ide-floppy: The floppy wants to issue more interrupts in DMA mode\n");
- (void) HWIF(drive)->dmaproc(ide_dma_off, drive);
- return ide_do_reset (drive);
- }
-#endif /* CONFIG_BLK_DEV_IDEDMA */
- bcount.b.high=IN_BYTE (IDE_BCOUNTH_REG); /* Get the number of bytes to transfer */
- bcount.b.low=IN_BYTE (IDE_BCOUNTL_REG); /* on this interrupt */
- ireason.all=IN_BYTE (IDE_IREASON_REG);
-
- if (ireason.b.cod) {
- printk (KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
- return ide_do_reset (drive);
- }
- if (ireason.b.io == test_bit (PC_WRITING, &pc->flags)) { /* Hopefully, we will never get here */
- printk (KERN_ERR "ide-floppy: We wanted to %s, ", ireason.b.io ? "Write":"Read");
- printk (KERN_ERR "but the floppy wants us to %s !\n",ireason.b.io ? "Read":"Write");
- return ide_do_reset (drive);
- }
- if (!test_bit (PC_WRITING, &pc->flags)) { /* Reading - Check that we have enough space */
- temp = pc->actually_transferred + bcount.all;
- if ( temp > pc->request_transfer) {
- if (temp > pc->buffer_size) {
- printk (KERN_ERR "ide-floppy: The floppy wants to send us more data than expected - discarding data\n");
- idefloppy_discard_data (drive,bcount.all);
- ide_set_handler (drive,&idefloppy_pc_intr,IDEFLOPPY_WAIT_CMD, NULL);
- return ide_started;
- }
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_NOTICE "ide-floppy: The floppy wants to send us more data than expected - allowing transfer\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
- }
- }
- if (test_bit (PC_WRITING, &pc->flags)) {
- if (pc->buffer != NULL)
- atapi_output_bytes (drive,pc->current_position,bcount.all); /* Write the current buffer */
- else
- idefloppy_output_buffers (drive, pc, bcount.all);
- } else {
- if (pc->buffer != NULL)
- atapi_input_bytes (drive,pc->current_position,bcount.all); /* Read the current buffer */
- else
- idefloppy_input_buffers (drive, pc, bcount.all);
- }
- pc->actually_transferred+=bcount.all; /* Update the current position */
- pc->current_position+=bcount.all;
-
- ide_set_handler (drive,&idefloppy_pc_intr,IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
- return ide_started;
-}
-
-static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
-{
- ide_startstop_t startstop;
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_ireason_reg_t ireason;
-
- if (ide_wait_stat (&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
- printk (KERN_ERR "ide-floppy: Strange, packet command initiated yet DRQ isn't asserted\n");
- return startstop;
- }
- ireason.all=IN_BYTE (IDE_IREASON_REG);
- if (!ireason.b.cod || ireason.b.io) {
- printk (KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while issuing a packet command\n");
- return ide_do_reset (drive);
- }
- ide_set_handler (drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* Set the interrupt routine */
- atapi_output_bytes (drive, floppy->pc->c, 12); /* Send the actual packet */
- return ide_started;
-}
-
-/*
- * Issue a packet command
- */
-static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_bcount_reg_t bcount;
- int dma_ok = 0;
-
-#if IDEFLOPPY_DEBUG_BUGS
- if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
- printk (KERN_ERR "ide-floppy: possible ide-floppy.c bug - Two request sense in serial were issued\n");
- }
-#endif /* IDEFLOPPY_DEBUG_BUGS */
-
- if (floppy->failed_pc == NULL && pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
- floppy->failed_pc=pc;
- floppy->pc=pc; /* Set the current packet command */
-
- if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || test_bit (PC_ABORT, &pc->flags)) {
- /*
- * We will "abort" retrying a packet command in case
- * a legitimate error code was received.
- */
- if (!test_bit (PC_ABORT, &pc->flags)) {
- printk (KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, asc = %2x, ascq = %2x\n",
- drive->name, pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq);
- pc->error = IDEFLOPPY_ERROR_GENERAL; /* Giving up */
- }
- floppy->failed_pc=NULL;
- pc->callback(drive);
- return ide_stopped;
- }
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "Retry number - %d\n",pc->retries);
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- pc->retries++;
- pc->actually_transferred=0; /* We haven't transferred any data yet */
- pc->current_position=pc->buffer;
- bcount.all = IDE_MIN(pc->request_transfer, 63 * 1024);
-
-#ifdef CONFIG_BLK_DEV_IDEDMA
- if (test_and_clear_bit (PC_DMA_ERROR, &pc->flags)) {
- (void) HWIF(drive)->dmaproc(ide_dma_off, drive);
- }
- if (test_bit (PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
- dma_ok=!HWIF(drive)->dmaproc(test_bit (PC_WRITING, &pc->flags) ? ide_dma_write : ide_dma_read, drive);
-#endif /* CONFIG_BLK_DEV_IDEDMA */
-
- if (IDE_CONTROL_REG)
- OUT_BYTE (drive->ctl,IDE_CONTROL_REG);
- OUT_BYTE (dma_ok ? 1:0,IDE_FEATURE_REG); /* Use PIO/DMA */
- OUT_BYTE (bcount.b.high,IDE_BCOUNTH_REG);
- OUT_BYTE (bcount.b.low,IDE_BCOUNTL_REG);
- OUT_BYTE (drive->select.all,IDE_SELECT_REG);
-
-#ifdef CONFIG_BLK_DEV_IDEDMA
- if (dma_ok) { /* Begin DMA, if necessary */
- set_bit (PC_DMA_IN_PROGRESS, &pc->flags);
- (void) (HWIF(drive)->dmaproc(ide_dma_begin, drive));
- }
-#endif /* CONFIG_BLK_DEV_IDEDMA */
-
- if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
- ide_set_handler (drive, &idefloppy_transfer_pc, IDEFLOPPY_WAIT_CMD, NULL);
- OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* Issue the packet command */
- return ide_started;
- } else {
- OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG);
- return idefloppy_transfer_pc (drive);
- }
-}
-
-static void idefloppy_rw_callback (ide_drive_t *drive)
-{
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- idefloppy_end_request(1, HWGROUP(drive));
- return;
-}
-
-static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
-{
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "ide-floppy: creating prevent removal command, prevent = %d\n", prevent);
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- idefloppy_init_pc (pc);
- pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
- pc->c[4] = prevent;
-}
-
-static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
-{
- idefloppy_init_pc (pc);
- pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
- pc->c[7] = 255;
- pc->c[8] = 255;
- pc->request_transfer = 255;
-}
-
-/*
- * A mode sense command is used to "sense" floppy parameters.
- */
-static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, byte page_code, byte type)
-{
- unsigned short length = sizeof (idefloppy_mode_parameter_header_t);
-
- idefloppy_init_pc (pc);
- pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
- pc->c[1] = 0;
- pc->c[2] = page_code + (type << 6);
-
- switch (page_code) {
- case IDEFLOPPY_CAPABILITIES_PAGE:
- length += 12;
- break;
- case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
- length += 32;
- break;
- default:
- printk (KERN_ERR "ide-floppy: unsupported page code in create_mode_sense_cmd\n");
- }
- put_unaligned (htons (length), (unsigned short *) &pc->c[7]);
- pc->request_transfer = length;
-}
-
-static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
-{
- idefloppy_init_pc (pc);
- pc->c[0] = IDEFLOPPY_START_STOP_CMD;
- pc->c[4] = start;
-}
-
-static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
-{
- idefloppy_init_pc(pc);
- pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
-}
-
-static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
-{
- int block = sector / floppy->bs_factor;
- int blocks = rq->nr_sectors / floppy->bs_factor;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk ("create_rw1%d_cmd: block == %d, blocks == %d\n",
- 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), block, blocks);
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- idefloppy_init_pc (pc);
- if (test_bit (IDEFLOPPY_USE_READ12, &floppy->flags)) {
- pc->c[0] = rq->cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
- put_unaligned (htonl (blocks), (unsigned int *) &pc->c[6]);
- } else {
- pc->c[0] = rq->cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
- put_unaligned (htons (blocks), (unsigned short *) &pc->c[7]);
- }
- put_unaligned (htonl (block), (unsigned int *) &pc->c[2]);
- pc->callback = &idefloppy_rw_callback;
- pc->rq = rq;
- pc->b_data = rq->buffer;
- pc->b_count = rq->cmd == READ ? 0 : rq->bh->b_size;
- if (rq->cmd == WRITE)
- set_bit (PC_WRITING, &pc->flags);
- pc->buffer = NULL;
- pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
- set_bit (PC_DMA_RECOMMENDED, &pc->flags);
-}
-
-/*
- * idefloppy_do_request is our request handling function.
- */
-static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_pc_t *pc;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "rq_status: %d, rq_dev: %u, cmd: %d, errors: %d\n",rq->rq_status,(unsigned int) rq->rq_dev,rq->cmd,rq->errors);
- printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %ld\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors);
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- if (rq->errors >= ERROR_MAX) {
- if (floppy->failed_pc != NULL)
- printk (KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, asc = %2x, ascq = %2x\n",
- drive->name, floppy->failed_pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq);
- else
- printk (KERN_ERR "ide-floppy: %s: I/O error\n", drive->name);
- idefloppy_end_request (0, HWGROUP(drive));
- return ide_stopped;
- }
- switch (rq->cmd) {
- case READ:
- case WRITE:
- if (rq->sector % floppy->bs_factor || rq->nr_sectors % floppy->bs_factor) {
- printk ("%s: unsupported r/w request size\n", drive->name);
- idefloppy_end_request (0, HWGROUP(drive));
- return ide_stopped;
- }
- pc = idefloppy_next_pc_storage (drive);
- idefloppy_create_rw_cmd (floppy, pc, rq, block);
- break;
- case IDEFLOPPY_PC_RQ:
- pc = (idefloppy_pc_t *) rq->buffer;
- break;
- default:
- printk (KERN_ERR "ide-floppy: unsupported command %x in request queue\n", rq->cmd);
- idefloppy_end_request (0,HWGROUP (drive));
- return ide_stopped;
- }
- pc->rq = rq;
- return idefloppy_issue_pc (drive, pc);
-}
-
-/*
- * idefloppy_queue_pc_tail adds a special packet command request to the
- * tail of the request queue, and waits for it to be serviced.
- */
-static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
-{
- struct request rq;
-
- ide_init_drive_cmd (&rq);
- rq.buffer = (char *) pc;
- rq.cmd = IDEFLOPPY_PC_RQ;
- return ide_do_drive_cmd (drive, &rq, ide_wait);
-}
-
-/*
- * Look at the flexible disk page parameters. We will ignore the CHS
- * capacity parameters and use the LBA parameters instead.
- */
-static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_pc_t pc;
- idefloppy_mode_parameter_header_t *header;
- idefloppy_flexible_disk_page_t *page;
- int capacity, lba_capacity;
-
- idefloppy_create_mode_sense_cmd (&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
- if (idefloppy_queue_pc_tail (drive,&pc)) {
- printk (KERN_ERR "ide-floppy: Can't get flexible disk page parameters\n");
- return 1;
- }
- header = (idefloppy_mode_parameter_header_t *) pc.buffer;
- floppy->wp = header->wp;
- page = (idefloppy_flexible_disk_page_t *) (header + 1);
-
- page->transfer_rate = ntohs (page->transfer_rate);
- page->sector_size = ntohs (page->sector_size);
- page->cyls = ntohs (page->cyls);
- page->rpm = ntohs (page->rpm);
- capacity = page->cyls * page->heads * page->sectors * page->sector_size;
- if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
- printk (KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, %d sector size, %d rpm\n",
- drive->name, capacity / 1024, page->cyls, page->heads, page->sectors,
- page->transfer_rate / 8, page->sector_size, page->rpm);
-
- floppy->flexible_disk_page = *page;
- drive->bios_cyl = page->cyls;
- drive->bios_head = page->heads;
- drive->bios_sect = page->sectors;
- lba_capacity = floppy->blocks * floppy->block_size;
- if (capacity != lba_capacity) {
- printk (KERN_NOTICE "%s: The drive reports both %d and %d bytes as its capacity\n",
- drive->name, capacity, lba_capacity);
- capacity = IDEFLOPPY_MIN(capacity, lba_capacity);
- floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
- }
- return 0;
-}
-
-/*
- * Determine if a media is present in the floppy drive, and if so,
- * its LBA capacity.
- */
-static int idefloppy_get_capacity (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_pc_t pc;
- idefloppy_capacity_header_t *header;
- idefloppy_capacity_descriptor_t *descriptor;
- int i, descriptors, rc = 1, blocks, length;
-
- drive->bios_cyl = 0;
- drive->bios_head = drive->bios_sect = 0;
- floppy->blocks = floppy->bs_factor = 0;
- drive->part[0].nr_sects = 0;
-
- idefloppy_create_read_capacity_cmd (&pc);
- if (idefloppy_queue_pc_tail (drive, &pc)) {
- printk (KERN_ERR "ide-floppy: Can't get floppy parameters\n");
- return 1;
- }
- header = (idefloppy_capacity_header_t *) pc.buffer;
- descriptors = header->length / sizeof (idefloppy_capacity_descriptor_t);
- descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
- for (i = 0; i < descriptors; i++, descriptor++) {
- blocks = descriptor->blocks = ntohl (descriptor->blocks);
- length = descriptor->length = ntohs (descriptor->length);
- if (!i && descriptor->dc == CAPACITY_CURRENT) {
- if (memcmp (descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) {
- printk (KERN_INFO "%s: %dkB, %d blocks, %d sector size, %s \n",
- drive->name, blocks * length / 1024, blocks, length,
- drive->using_dma ? ", DMA":"");
- }
- floppy->capacity = *descriptor;
- if (!length || length % 512)
- printk (KERN_ERR "%s: %d bytes block size not supported\n", drive->name, length);
- else {
- floppy->blocks = blocks;
- floppy->block_size = length;
- if ((floppy->bs_factor = length / 512) != 1)
- printk (KERN_NOTICE "%s: warning: non 512 bytes block size not fully supported\n", drive->name);
- rc = 0;
- }
- }
-#if IDEFLOPPY_DEBUG_INFO
- if (!i) printk (KERN_INFO "Descriptor 0 Code: %d\n", descriptor->dc);
- printk (KERN_INFO "Descriptor %d: %dkB, %d blocks, %d sector size\n", i, blocks * length / 1024, blocks, length);
-#endif /* IDEFLOPPY_DEBUG_INFO */
- }
- (void) idefloppy_get_flexible_disk_page (drive);
- drive->part[0].nr_sects = floppy->blocks * floppy->bs_factor;
- return rc;
-}
-
-/*
- * Our special ide-floppy ioctl's.
- *
- * Currently there aren't any ioctl's.
- */
-static int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- idefloppy_pc_t pc;
-
- if (cmd == CDROMEJECT) {
- if (drive->usage > 1)
- return -EBUSY;
- idefloppy_create_prevent_cmd (&pc, 0);
- (void) idefloppy_queue_pc_tail (drive, &pc);
- idefloppy_create_start_stop_cmd (&pc, 2);
- (void) idefloppy_queue_pc_tail (drive, &pc);
- return 0;
- }
- return -EIO;
-}
-
-/*
- * Our open/release functions
- */
-static int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- idefloppy_pc_t pc;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "Reached idefloppy_open\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- MOD_INC_USE_COUNT;
- if (drive->usage == 1) {
- idefloppy_create_test_unit_ready_cmd(&pc);
- if (idefloppy_queue_pc_tail(drive, &pc)) {
- idefloppy_create_start_stop_cmd (&pc, 1);
- (void) idefloppy_queue_pc_tail (drive, &pc);
- }
- if (idefloppy_get_capacity (drive)) {
- drive->usage--;
- MOD_DEC_USE_COUNT;
- return -EIO;
- }
- if (floppy->wp && (filp->f_mode & 2)) {
- drive->usage--;
- MOD_DEC_USE_COUNT;
- return -EROFS;
- }
- set_bit (IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
- idefloppy_create_prevent_cmd (&pc, 1);
- (void) idefloppy_queue_pc_tail (drive, &pc);
- check_disk_change(inode->i_rdev);
- }
- return 0;
-}
-
-static void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive)
-{
- idefloppy_pc_t pc;
-
-#if IDEFLOPPY_DEBUG_LOG
- printk (KERN_INFO "Reached idefloppy_release\n");
-#endif /* IDEFLOPPY_DEBUG_LOG */
-
- if (!drive->usage) {
- invalidate_buffers (inode->i_rdev);
- idefloppy_create_prevent_cmd (&pc, 0);
- (void) idefloppy_queue_pc_tail (drive, &pc);
- }
- MOD_DEC_USE_COUNT;
-}
-
-/*
- * Check media change. Use a simple algorithm for now.
- */
-static int idefloppy_media_change (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- return test_and_clear_bit (IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
-}
-
-/*
- * Return the current floppy capacity to ide.c.
- */
-static unsigned long idefloppy_capacity (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
- unsigned long capacity = floppy->blocks * floppy->bs_factor;
-
- return capacity;
-}
-
-/*
- * idefloppy_identify_device checks if we can support a drive,
- * based on the ATAPI IDENTIFY command results.
- */
-static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
-{
- struct idefloppy_id_gcw gcw;
-#if IDEFLOPPY_DEBUG_INFO
- unsigned short mask,i;
- char buffer[80];
-#endif /* IDEFLOPPY_DEBUG_INFO */
-
- *((unsigned short *) &gcw) = id->config;
-
-#ifdef CONFIG_PPC
- /* kludge for Apple PowerBook internal zip */
- if ((gcw.device_type == 5) && !strstr(id->model, "CD-ROM")
- && strstr(id->model, "ZIP"))
- gcw.device_type = 0;
-#endif
-
-#if IDEFLOPPY_DEBUG_INFO
- printk (KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
- switch (gcw.protocol) {
- case 0: case 1: sprintf (buffer, "ATA");break;
- case 2: sprintf (buffer, "ATAPI");break;
- case 3: sprintf (buffer, "Reserved (Unknown to ide-floppy)");break;
- }
- printk (KERN_INFO "Protocol Type: %s\n", buffer);
- switch (gcw.device_type) {
- case 0: sprintf (buffer, "Direct-access Device");break;
- case 1: sprintf (buffer, "Streaming Tape Device");break;
- case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
- case 5: sprintf (buffer, "CD-ROM Device");break;
- case 6: sprintf (buffer, "Reserved");
- case 7: sprintf (buffer, "Optical memory Device");break;
- case 0x1f: sprintf (buffer, "Unknown or no Device type");break;
- default: sprintf (buffer, "Reserved");
- }
- printk (KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
- printk (KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
- switch (gcw.drq_type) {
- case 0: sprintf (buffer, "Microprocessor DRQ");break;
- case 1: sprintf (buffer, "Interrupt DRQ");break;
- case 2: sprintf (buffer, "Accelerated DRQ");break;
- case 3: sprintf (buffer, "Reserved");break;
- }
- printk (KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
- switch (gcw.packet_size) {
- case 0: sprintf (buffer, "12 bytes");break;
- case 1: sprintf (buffer, "16 bytes");break;
- default: sprintf (buffer, "Reserved");break;
- }
- printk (KERN_INFO "Command Packet Size: %s\n", buffer);
- printk (KERN_INFO "Model: %.40s\n",id->model);
- printk (KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
- printk (KERN_INFO "Serial Number: %.20s\n",id->serial_no);
- printk (KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
- printk (KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
- printk (KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
- printk (KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
- printk (KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
- printk (KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
- printk (KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
- printk (KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
- printk (KERN_INFO "Single Word DMA supported modes:\n");
- for (i=0,mask=1;i<8;i++,mask=mask << 1) {
- if (id->dma_1word & mask)
- printk (KERN_INFO " Mode %d%s\n", i, (id->dma_1word & (mask << 8)) ? " (active)" : "");
- }
- printk (KERN_INFO "Multi Word DMA supported modes:\n");
- for (i=0,mask=1;i<8;i++,mask=mask << 1) {
- if (id->dma_mword & mask)
- printk (KERN_INFO " Mode %d%s\n", i, (id->dma_mword & (mask << 8)) ? " (active)" : "");
- }
- if (id->field_valid & 0x0002) {
- printk (KERN_INFO "Enhanced PIO Modes: %s\n",id->eide_pio_modes & 1 ? "Mode 3":"None");
- if (id->eide_dma_min == 0)
- sprintf (buffer, "Not supported");
- else
- sprintf (buffer, "%d ns",id->eide_dma_min);
- printk (KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
- if (id->eide_dma_time == 0)
- sprintf (buffer, "Not supported");
- else
- sprintf (buffer, "%d ns",id->eide_dma_time);
- printk (KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
- if (id->eide_pio == 0)
- sprintf (buffer, "Not supported");
- else
- sprintf (buffer, "%d ns",id->eide_pio);
- printk (KERN_INFO "Minimum PIO cycle without IORDY: %s\n", buffer);
- if (id->eide_pio_iordy == 0)
- sprintf (buffer, "Not supported");
- else
- sprintf (buffer, "%d ns",id->eide_pio_iordy);
- printk (KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
- } else
- printk (KERN_INFO "According to the device, fields 64-70 are not valid.\n");
-#endif /* IDEFLOPPY_DEBUG_INFO */
-
- if (gcw.protocol != 2)
- printk (KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
- else if (gcw.device_type != 0)
- printk (KERN_ERR "ide-floppy: Device type is not set to floppy\n");
- else if (!gcw.removable)
- printk (KERN_ERR "ide-floppy: The removable flag is not set\n");
- else if (gcw.drq_type == 3) {
- printk (KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
- } else if (gcw.packet_size != 0) {
- printk (KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
- } else
- return 1;
- return 0;
-}
-
-static void idefloppy_add_settings(ide_drive_t *drive)
-{
- int major = HWIF(drive)->major;
- int minor = drive->select.b.unit << PARTN_BITS;
-
- ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
- ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
- ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
- ide_add_setting(drive, "breada_readahead", SETTING_RW, BLKRAGET, BLKRASET, TYPE_INT, 0, 255, 1, 2, &read_ahead[major], NULL);
- ide_add_setting(drive, "file_readahead", SETTING_RW, BLKFRAGET, BLKFRASET, TYPE_INTA, 0, INT_MAX, 1, 1024, &max_readahead[major][minor], NULL);
- ide_add_setting(drive, "max_kb_per_request", SETTING_RW, BLKSECTGET, BLKSECTSET, TYPE_INTA, 1, 255, 1, 2, &max_sectors[major][minor], NULL);
-
-}
-
-/*
- * Driver initialization.
- */
-static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
-{
- struct idefloppy_id_gcw gcw;
- int major = HWIF(drive)->major, i;
- int minor = drive->select.b.unit << PARTN_BITS;
-
- *((unsigned short *) &gcw) = drive->id->config;
- drive->driver_data = floppy;
- drive->ready_stat = 0;
- memset (floppy, 0, sizeof (idefloppy_floppy_t));
- floppy->drive = drive;
- floppy->pc = floppy->pc_stack;
- if (gcw.drq_type == 1)
- set_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
- /*
- * We used to check revisions here. At this point however
- * I'm giving up. Just assume they are all broken, its easier.
- *
- * The actual reason for the workarounds was likely
- * a driver bug after all rather than a firmware bug,
- * and the workaround below used to hide it. It should
- * be fixed as of version 1.9, but to be on the safe side
- * we'll leave the limitation below for the 2.2.x tree.
- */
-
- if (strcmp(drive->id->model, "IOMEGA ZIP 100 ATAPI") == 0)
- {
- for (i = 0; i < 1 << PARTN_BITS; i++)
- max_sectors[major][minor + i] = 64;
- }
-
- (void) idefloppy_get_capacity (drive);
- idefloppy_add_settings(drive);
- for (i = 0; i < MAX_DRIVES; ++i) {
- ide_hwif_t *hwif = HWIF(drive);
-
- if (drive != &hwif->drives[i]) continue;
- hwif->gd->de_arr[i] = drive->de;
- if (drive->removable)
- hwif->gd->flags[i] |= GENHD_FL_REMOVABLE;
- break;
- }
-}
-
-static int idefloppy_cleanup (ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- if (ide_unregister_subdriver (drive))
- return 1;
- drive->driver_data = NULL;
- kfree (floppy);
- return 0;
-}
-
-#ifdef CONFIG_PROC_FS
-
-static ide_proc_entry_t idefloppy_proc[] = {
- { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
- { NULL, 0, NULL, NULL }
-};
-
-#else
-
-#define idefloppy_proc NULL
-
-#endif /* CONFIG_PROC_FS */
-
-/*
- * IDE subdriver functions, registered with ide.c
- */
-static ide_driver_t idefloppy_driver = {
- "ide-floppy", /* name */
- IDEFLOPPY_VERSION, /* version */
- ide_floppy, /* media */
- 0, /* busy */
- 1, /* supports_dma */
- 0, /* supports_dsc_overlap */
- idefloppy_cleanup, /* cleanup */
- idefloppy_do_request, /* do_request */
- idefloppy_end_request, /* end_request */
- idefloppy_ioctl, /* ioctl */
- idefloppy_open, /* open */
- idefloppy_release, /* release */
- idefloppy_media_change, /* media_change */
- NULL, /* pre_reset */
- idefloppy_capacity, /* capacity */
- NULL, /* special */
- idefloppy_proc /* proc */
-};
-
-int idefloppy_init (void);
-static ide_module_t idefloppy_module = {
- IDE_DRIVER_MODULE,
- idefloppy_init,
- &idefloppy_driver,
- NULL
-};
-
-/*
- * idefloppy_init will register the driver for each floppy.
- */
-int idefloppy_init (void)
-{
- ide_drive_t *drive;
- idefloppy_floppy_t *floppy;
- int failed = 0;
-
- MOD_INC_USE_COUNT;
- while ((drive = ide_scan_devices (ide_floppy, idefloppy_driver.name, NULL, failed++)) != NULL) {
- if (!idefloppy_identify_device (drive, drive->id)) {
- printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
- continue;
- }
- if (drive->scsi) {
- printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
- continue;
- }
- if ((floppy = (idefloppy_floppy_t *) kmalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
- printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
- continue;
- }
- if (ide_register_subdriver (drive, &idefloppy_driver, IDE_SUBDRIVER_VERSION)) {
- printk (KERN_ERR "ide-floppy: %s: Failed to register the driver with ide.c\n", drive->name);
- kfree (floppy);
- continue;
- }
- idefloppy_setup (drive, floppy);
- failed--;
- }
- ide_register_module(&idefloppy_module);
- MOD_DEC_USE_COUNT;
- return 0;
-}
-
-#ifdef MODULE
-int init_module (void)
-{
- return idefloppy_init ();
-}
-
-void cleanup_module (void)
-{
- ide_drive_t *drive;
- int failed = 0;
-
- while ((drive = ide_scan_devices (ide_floppy, idefloppy_driver.name, &idefloppy_driver, failed)) != NULL) {
- if (idefloppy_cleanup (drive)) {
- printk ("%s: cleanup_module() called while still busy\n", drive->name);
- failed++;
- }
- /* We must remove proc entries defined in this module.
- Otherwise we oops while accessing these entries */
- if (drive->proc)
- ide_remove_proc_entries(drive->proc, idefloppy_proc);
- }
- ide_unregister_module(&idefloppy_module);
-}
-#endif /* MODULE */
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)