diff options
Diffstat (limited to 'drivers/block/ide-floppy.c')
| -rw-r--r-- | drivers/block/ide-floppy.c | 1432 |
1 files changed, 1432 insertions, 0 deletions
diff --git a/drivers/block/ide-floppy.c b/drivers/block/ide-floppy.c new file mode 100644 index 000000000..8de2b1a27 --- /dev/null +++ b/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 */ |