patch-2.1.8 linux/drivers/block/ide-floppy.c
Next file: linux/drivers/block/ide-probe.c
Previous file: linux/drivers/block/ide-disk.c
Back to the patch index
Back to the overall index
- Lines: 1433
- Date:
Wed Nov 6 14:49:31 1996
- Orig file:
v2.1.7/linux/drivers/block/ide-floppy.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v2.1.7/linux/drivers/block/ide-floppy.c linux/drivers/block/ide-floppy.c
@@ -0,0 +1,1432 @@
+/*
+ * linux/drivers/block/ide-floppy.c Version 0.2 - ALPHA Oct 31, 1996
+ *
+ * Copyright (C) 1996 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.
+ */
+
+#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/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/blkdev.h>
+#include <linux/errno.h>
+#include <linux/hdreg.h>
+#include <linux/genhd.h>
+#include <linux/malloc.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>
+
+/*
+ * Main Linux ide driver include file
+ */
+#include "ide.h"
+
+/*
+ * The following are used to debug the driver.
+ */
+#define IDEFLOPPY_DEBUG_LOG 0
+#define IDEFLOPPY_DEBUG_INFO 0
+#define IDEFLOPPY_DEBUG_BUGS 1
+
+/*
+ * 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 {
+ unsigned page_code :6; /* Page code - Should be 0x1b */
+ unsigned reserved1_6 :1; /* Reserved */
+ unsigned ps :1; /* Should be 0 */
+ u8 page_length; /* Page Length - Should be 0xa */
+ 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 */
+ u8 reserved[8];
+} idefloppy_capabilities_page_t;
+
+/*
+ * Flexible disk page.
+ */
+typedef struct {
+ 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 */
+ 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 */
+ unsigned dc :2; /* Descriptor Code */
+ unsigned reserved :6;
+ 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 */
+
+ 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 {
+ 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 */
+ } b;
+} idefloppy_status_reg_t;
+
+/*
+ * The ATAPI error register.
+ */
+typedef union {
+ unsigned all :8;
+ struct {
+ 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 */
+ } b;
+} idefloppy_error_reg_t;
+
+/*
+ * ATAPI Feature Register
+ */
+typedef union {
+ unsigned all :8;
+ struct {
+ unsigned dma :1; /* Using DMA or PIO */
+ unsigned reserved321 :3; /* Reserved */
+ unsigned reserved654 :3; /* Reserved (Tag Type) */
+ unsigned reserved7 :1; /* Reserved */
+ } b;
+} idefloppy_feature_reg_t;
+
+/*
+ * ATAPI Byte Count Register.
+ */
+typedef union {
+ unsigned all :16;
+ struct {
+ unsigned low :8; /* LSB */
+ unsigned high :8; /* MSB */
+ } b;
+} idefloppy_bcount_reg_t;
+
+/*
+ * ATAPI Interrupt Reason Register.
+ */
+typedef union {
+ unsigned all :8;
+ struct {
+ 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 */
+ } b;
+} idefloppy_ireason_reg_t;
+
+/*
+ * ATAPI floppy Drive Select Register
+ */
+typedef union {
+ unsigned all :8;
+ struct {
+ 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 */
+ } b;
+} idefloppy_drivesel_reg_t;
+
+/*
+ * ATAPI Device Control Register
+ */
+typedef union {
+ unsigned all :8;
+ struct {
+ 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 */
+ } 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 {
+ 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 */
+};
+
+/*
+ * INQUIRY packet command - Data Format
+ */
+typedef struct {
+ 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 */
+ 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 {
+ 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;
+ 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 */
+ unsigned reserved3 :7;
+ unsigned wp :1; /* Write protect */
+ 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;
+ struct request *rq = hwgroup->rq;
+
+#if IDEFLOPPY_DEBUG_LOG
+ printk (KERN_INFO "Reached idefloppy_end_request\n");
+#endif /* IDEFLOPPY_DEBUG_LOG */
+
+ if (!IDEFLOPPY_RQ_CMD (rq->cmd)) {
+ ide_end_request (uptodate, hwgroup);
+ return;
+ }
+ switch (uptodate) {
+ case 0: rq->errors = IDEFLOPPY_ERROR_GENERAL; break;
+ case 1: rq->errors = 0; break;
+ default: rq->errors = uptodate;
+ }
+ 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 IDEFLOPPY_DEBUG_BUGS
+ 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;
+ }
+#endif /* IDEFLOPPY_DEBUG_BUGS */
+ 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;
+ 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;
+ }
+ }
+}
+
+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 IDEFLOPPY_DEBUG_BUGS
+ 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;
+ }
+#endif /* IDEFLOPPY_DEBUG_BUGS */
+ 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;
+ 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;
+ }
+ }
+ }
+}
+
+#ifdef CONFIG_BLK_DEV_TRITON
+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_TRITON */
+
+/*
+ * 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
+ 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);
+#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 void 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_TRITON
+ if (test_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
+ if (HWIF(drive)->dmaproc(ide_dma_status_bad, drive)) {
+ set_bit (PC_DMA_ERROR, &pc->flags);
+ } else {
+ pc->actually_transferred=pc->request_transfer;
+ idefloppy_update_buffers (drive, pc);
+ }
+ (void) (HWIF(drive)->dmaproc(ide_dma_abort, drive)); /* End DMA */
+#if IDEFLOPPY_DEBUG_LOG
+ printk (KERN_INFO "ide-floppy: DMA finished\n");
+#endif /* IDEFLOPPY_DEBUG_LOG */
+ }
+#endif /* CONFIG_BLK_DEV_TRITON */
+
+ 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();
+
+ 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, ",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");
+ ide_do_reset (drive);
+ return;
+ }
+ idefloppy_retry_pc (drive); /* Retry operation */
+ return;
+ }
+ pc->error = 0;
+ if (floppy->failed_pc == pc)
+ floppy->failed_pc=NULL;
+ pc->callback(drive); /* Command finished - Call the callback function */
+ return;
+ }
+#ifdef CONFIG_BLK_DEV_TRITON
+ if (clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
+ printk (KERN_ERR "ide-floppy: The floppy wants to issue more interrupts in DMA mode\n");
+ printk (KERN_ERR "ide-floppy: DMA disabled, reverting to PIO\n");
+ drive->using_dma=0;
+ ide_do_reset (drive);
+ return;
+ }
+#endif /* CONFIG_BLK_DEV_TRITON */
+ 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");
+ ide_do_reset (drive);
+ return;
+ }
+ 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");
+ ide_do_reset (drive);
+ return;
+ }
+ 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,WAIT_CMD);
+ return;
+ }
+#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,WAIT_CMD); /* And set the interrupt handler again */
+}
+
+static void idefloppy_transfer_pc (ide_drive_t *drive)
+{
+ idefloppy_floppy_t *floppy = drive->driver_data;
+ idefloppy_ireason_reg_t ireason;
+
+ if (ide_wait_stat (drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
+ printk (KERN_ERR "ide-floppy: Strange, packet command initiated yet DRQ isn't asserted\n");
+ return;
+ }
+ 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");
+ ide_do_reset (drive);
+ return;
+ }
+ ide_set_handler (drive, &idefloppy_pc_intr, WAIT_CMD); /* Set the interrupt routine */
+ atapi_output_bytes (drive, floppy->pc->c, 12); /* Send the actual packet */
+}
+
+/*
+ * Issue a packet command
+ */
+static void 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;
+ }
+#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=pc->request_transfer; /* Request to transfer the entire buffer at once */
+
+#ifdef CONFIG_BLK_DEV_TRITON
+ if (clear_bit (PC_DMA_ERROR, &pc->flags)) {
+ printk (KERN_WARNING "ide-floppy: DMA disabled, reverting to PIO\n");
+ drive->using_dma=0;
+ }
+ 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_TRITON */
+
+ 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_TRITON
+ 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_TRITON */
+
+ if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
+ ide_set_handler (drive, &idefloppy_transfer_pc, WAIT_CMD);
+ OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* Issue the packet command */
+ } else {
+ OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG);
+ 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 */
+
+ 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;
+}
+
+/*
+ * 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_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
+{
+ int block = rq->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 void 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) {
+ 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);
+ idefloppy_end_request (0, HWGROUP(drive));
+ return;
+ }
+ 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;
+ }
+ pc = idefloppy_next_pc_storage (drive);
+ idefloppy_create_rw_cmd (floppy, pc, rq);
+ 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;
+ }
+ pc->rq = rq;
+ 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;
+
+ 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;
+ 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;
+ if (capacity != floppy->blocks * floppy->block_size)
+ printk (KERN_NOTICE "%s: The drive reports both %d and %d bytes as its capacity\n",
+ drive->name, capacity, floppy->blocks * floppy->block_size);
+ }
+ 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;
+
+ 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\n", drive->name, blocks * length / 1024, blocks, length);
+ 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);
+ drive->part[0].nr_sects = blocks * floppy->bs_factor;
+ if (length > BLOCK_SIZE)
+ blksize_size[HWIF(drive)->major][drive->select.b.unit << PARTN_BITS] = length;
+ 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);
+ 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)
+{
+ 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_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;
+ }
+ 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 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 ? capacity : 0x7fffffff;
+}
+
+/*
+ * 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;
+
+#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: %s\n",id->model);
+ printk (KERN_INFO "Firmware Revision: %s\n",id->fw_rev);
+ printk (KERN_INFO "Serial Number: %s\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;
+}
+
+/*
+ * idefloppy_get_capabilities asks the floppy about its various
+ * parameters.
+ */
+static void idefloppy_get_capabilities (ide_drive_t *drive)
+{
+ idefloppy_pc_t pc;
+ idefloppy_mode_parameter_header_t *header;
+ idefloppy_capabilities_page_t *capabilities;
+
+ idefloppy_create_mode_sense_cmd (&pc, IDEFLOPPY_CAPABILITIES_PAGE, MODE_SENSE_CURRENT);
+ if (idefloppy_queue_pc_tail (drive,&pc)) {
+ printk (KERN_ERR "ide-floppy: Can't get drive capabilities\n");
+ return;
+ }
+ header = (idefloppy_mode_parameter_header_t *) pc.buffer;
+ capabilities = (idefloppy_capabilities_page_t *) (header + 1);
+
+ if (!capabilities->sflp)
+ printk (KERN_INFO "%s: Warning - system floppy device bit is not set\n", drive->name);
+
+#if IDEFLOPPY_DEBUG_INFO
+ printk (KERN_INFO "Dumping the results of the MODE SENSE packet command\n");
+ printk (KERN_INFO "Mode Parameter Header:\n");
+ printk (KERN_INFO "Mode Data Length - %d\n",header->mode_data_length);
+ printk (KERN_INFO "Medium Type - %d\n",header->medium_type);
+ printk (KERN_INFO "WP - %d\n",header->wp);
+
+ printk (KERN_INFO "Capabilities Page:\n");
+ printk (KERN_INFO "Page code - %d\n",capabilities->page_code);
+ printk (KERN_INFO "Page length - %d\n",capabilities->page_length);
+ printk (KERN_INFO "PS - %d\n",capabilities->ps);
+ printk (KERN_INFO "System Floppy Type device - %s\n",capabilities->sflp ? "Yes":"No");
+ printk (KERN_INFO "Supports Reporting progress of Format - %s\n",capabilities->srfp ? "Yes":"No");
+ printk (KERN_INFO "Non CD Optical device - %s\n",capabilities->ncd ? "Yes":"No");
+ printk (KERN_INFO "Multiple LUN support - %s\n",capabilities->sml ? "Yes":"No");
+ printk (KERN_INFO "Total LUN supported - %s\n",capabilities->tlun ? "Yes":"No");
+#endif /* IDEFLOPPY_DEBUG_INFO */
+}
+
+/*
+ * Driver initialization.
+ */
+static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
+{
+ struct idefloppy_id_gcw gcw;
+
+ *((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);
+
+ idefloppy_get_capabilities (drive);
+ (void) idefloppy_get_capacity (drive);
+}
+
+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;
+}
+
+int idefloppy_init (void);
+static ide_module_t idefloppy_module = {
+ IDE_DRIVER_MODULE,
+ idefloppy_init,
+ NULL
+};
+
+/*
+ * IDE subdriver functions, registered with ide.c
+ */
+static ide_driver_t idefloppy_driver = {
+ ide_floppy, /* media */
+ 0, /* busy */
+ 1, /* supports_dma */
+ 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_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, 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 ((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, failed)) != NULL)
+ if (idefloppy_cleanup (drive)) {
+ printk ("%s: cleanup_module() called while still busy\n", drive->name);
+ failed++;
+ }
+ ide_unregister_module(&idefloppy_module);
+}
+#endif /* MODULE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov