/* * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002 * * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net> */ /* * IDE ATAPI floppy driver. * * The driver currently doesn't have any fancy features, just the bare * minimum read/write support. * * This driver supports the following IDE floppy drives: * * LS-120/240 SuperDisk * Iomega Zip 100/250 * Iomega PC Card Clik!/PocketZip * * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive. * * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c. * Ver 0.2 Oct 31 96 Minor changes. * Ver 0.3 Dec 2 96 Fixed error recovery bug. * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl. * Ver 0.5 Feb 21 97 Add partitions support. * Use the minimum of the LBA and CHS capacities. * Avoid hwgroup->rq == NULL on the last irq. * Fix potential null dereferencing with DEBUG_LOG. * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds. * Add media write-protect detection. * Issue START command only if TEST UNIT READY fails. * Add work-around for IOMEGA ZIP revision 21.D. * Remove idefloppy_get_capabilities(). * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of * bytes requested on each interrupt to be zero. * Thanks to <shanos@es.co.nz> for pointing this out. * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> * Implement low level formatting. Reimplemented * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp * bit. My LS-120 drive barfs on * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. * Compromise by not reporting a failure to get this * mode page. Implemented four IOCTLs in order to * implement formatting. IOCTls begin with 0x4600, * 0x46 is 'F' as in Format. * Jan 9 01 Userland option to select format verify. * Added PC_SUPPRESS_ERROR flag - some idefloppy drives * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and * return a sense error. Suppress error reporting in * this particular case in order to avoid spurious * errors in syslog. The culprit is * idefloppy_get_capability_page(), so move it to * idefloppy_begin_format() so that it's not used * unless absolutely necessary. * If drive does not support format progress indication * monitor the dsc bit in the status register. * Also, O_NDELAY on open will allow the device to be * opened without a disk available. This can be used to * open an unformatted disk, or get the device capacity. * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by * <paul@paulbristow.net> * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this * driver. Included Powerbook internal zip kludge. * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive * no disk on insert and disk change now works * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere * Ver 0.95 Nov 7 00 Brought across to kernel 2.4 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0 * including set_bit patch from Rusty Russell * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to * fix a lost interrupt problem. It appears the busy * bit was being deasserted by my IOMEGA ATAPI ZIP 100 * drive before the drive was actually ready. * Ver 0.98a Oct 29 01 Expose delay value so we can play. * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code * to support new PocketZip drives */ #define IDEFLOPPY_VERSION "0.99.newide" #include <linux/config.h> #include <linux/module.h> #include <linux/types.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/major.h> #include <linux/errno.h> #include <linux/genhd.h> #include <linux/slab.h> #include <linux/cdrom.h> #include <linux/ide.h> #include <linux/bitops.h> #include <asm/byteorder.h> #include <asm/irq.h> #include <asm/uaccess.h> #include <asm/io.h> #include <asm/unaligned.h> /* * The following are used to debug the driver. */ #define IDEFLOPPY_DEBUG_LOG 0 #define IDEFLOPPY_DEBUG_INFO 0 #define IDEFLOPPY_DEBUG_BUGS 1 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ #define IDEFLOPPY_DEBUG( fmt, args... ) #if IDEFLOPPY_DEBUG_LOG #define debug_log printk #else #define debug_log(fmt, args... ) do {} while(0) #endif /* * Some drives require a longer irq timeout. */ #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) /* * After each failed packet command we issue a request sense command * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. */ #define IDEFLOPPY_MAX_PC_RETRIES 3 /* * With each packet command, we allocate a buffer of * IDEFLOPPY_PC_BUFFER_SIZE bytes. */ #define IDEFLOPPY_PC_BUFFER_SIZE 256 /* * In various places in the driver, we need to allocate storage * for packet commands and requests, which will remain valid while * we leave the driver to wait for an interrupt or a timeout event. */ #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) /* * Our view of a packet command. */ typedef struct idefloppy_packet_command_s { u8 c[12]; /* Actual packet bytes */ int retries; /* On each retry, we increment retries */ int error; /* Error code */ int request_transfer; /* Bytes to transfer */ int actually_transferred; /* Bytes actually transferred */ int buffer_size; /* Size of our data buffer */ int b_count; /* Missing/Available data on the current buffer */ struct request *rq; /* The corresponding request */ u8 *buffer; /* Data buffer */ u8 *current_position; /* Pointer into the above buffer */ void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ unsigned long flags; /* Status/Action bit flags: long for set_bit */ } 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 */ #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ /* * Removable Block Access Capabilities Page */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned page_code :6; /* Page code - Should be 0x1b */ unsigned reserved1_6 :1; /* Reserved */ unsigned ps :1; /* Should be 0 */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned ps :1; /* Should be 0 */ unsigned reserved1_6 :1; /* Reserved */ unsigned page_code :6; /* Page code - Should be 0x1b */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 page_length; /* Page Length - Should be 0xa */ #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned reserved2 :6; unsigned srfp :1; /* Supports reporting progress of format */ unsigned sflp :1; /* System floppy type device */ unsigned tlun :3; /* Total logical units supported by the device */ unsigned reserved3 :3; unsigned sml :1; /* Single / Multiple lun supported */ unsigned ncd :1; /* Non cd optical device */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned sflp :1; /* System floppy type device */ unsigned srfp :1; /* Supports reporting progress of format */ unsigned reserved2 :6; unsigned ncd :1; /* Non cd optical device */ unsigned sml :1; /* Single / Multiple lun supported */ unsigned reserved3 :3; unsigned tlun :3; /* Total logical units supported by the device */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 reserved[8]; } idefloppy_capabilities_page_t; /* * Flexible disk page. */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned page_code :6; /* Page code - Should be 0x5 */ unsigned reserved1_6 :1; /* Reserved */ unsigned ps :1; /* The device is capable of saving the page */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned ps :1; /* The device is capable of saving the page */ unsigned reserved1_6 :1; /* Reserved */ unsigned page_code :6; /* Page code - Should be 0x5 */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 page_length; /* Page Length - Should be 0x1e */ u16 transfer_rate; /* In kilobits per second */ u8 heads, sectors; /* Number of heads, Number of sectors per track */ u16 sector_size; /* Byes per sector */ u16 cyls; /* Number of cylinders */ u8 reserved10[10]; u8 motor_delay; /* Motor off delay */ u8 reserved21[7]; u16 rpm; /* Rotations per minute */ u8 reserved30[2]; } idefloppy_flexible_disk_page_t; /* * Format capacity */ typedef struct { u8 reserved[3]; u8 length; /* Length of the following descriptors in bytes */ } idefloppy_capacity_header_t; typedef struct { u32 blocks; /* Number of blocks */ #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned dc :2; /* Descriptor Code */ unsigned reserved :6; #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved :6; unsigned dc :2; /* Descriptor Code */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 length_msb; /* Block Length (MSB)*/ u16 length; /* Block Length */ } idefloppy_capacity_descriptor_t; #define CAPACITY_INVALID 0x00 #define CAPACITY_UNFORMATTED 0x01 #define CAPACITY_CURRENT 0x02 #define CAPACITY_NO_CARTRIDGE 0x03 /* * Most of our global data which we need to save even as we leave the * driver due to an interrupt or a timer event is stored in a variable * of type idefloppy_floppy_t, defined below. */ typedef struct ide_floppy_obj { ide_drive_t *drive; ide_driver_t *driver; struct gendisk *disk; struct kref kref; /* Current packet command */ idefloppy_pc_t *pc; /* Last failed packet command */ idefloppy_pc_t *failed_pc; /* Packet command stack */ idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; /* Next free packet command storage space */ int pc_stack_index; struct request rq_stack[IDEFLOPPY_PC_STACK]; /* We implement a circular array */ int rq_stack_index; /* * Last error information */ u8 sense_key, asc, ascq; /* delay this long before sending packet command */ u8 ticks; int progress_indication; /* * Device information */ /* Current format */ int blocks, block_size, bs_factor; /* Last format capacity */ idefloppy_capacity_descriptor_t capacity; /* Copy of the flexible disk page */ idefloppy_flexible_disk_page_t flexible_disk_page; /* Write protect */ int wp; /* Supports format progress report */ int srfp; /* Status/Action flags */ unsigned long flags; } idefloppy_floppy_t; #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ /* * 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 */ #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ /* * 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 /* * IOCTLs used in low-level formatting. */ #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 #if 0 /* * 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)) #endif /* * Error codes which are returned in rq->errors to the higher part * of the driver. */ #define IDEFLOPPY_ERROR_GENERAL 101 /* * The following is used to format the general configuration word of * the ATAPI IDENTIFY DEVICE command. */ struct idefloppy_id_gcw { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned packet_size :2; /* Packet Size */ unsigned reserved234 :3; /* Reserved */ unsigned drq_type :2; /* Command packet DRQ type */ unsigned removable :1; /* Removable media */ unsigned device_type :5; /* Device type */ unsigned reserved13 :1; /* Reserved */ unsigned protocol :2; /* Protocol type */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned protocol :2; /* Protocol type */ unsigned reserved13 :1; /* Reserved */ unsigned device_type :5; /* Device type */ unsigned removable :1; /* Removable media */ unsigned drq_type :2; /* Command packet DRQ type */ unsigned reserved234 :3; /* Reserved */ unsigned packet_size :2; /* Packet Size */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif }; /* * INQUIRY packet command - Data Format */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned device_type :5; /* Peripheral Device Type */ unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ unsigned reserved1_6t0 :7; /* Reserved */ unsigned rmb :1; /* Removable Medium Bit */ unsigned ansi_version :3; /* ANSI Version */ unsigned ecma_version :3; /* ECMA Version */ unsigned iso_version :2; /* ISO Version */ unsigned response_format :4; /* Response Data Format */ unsigned reserved3_45 :2; /* Reserved */ unsigned reserved3_6 :1; /* TrmIOP - Reserved */ unsigned reserved3_7 :1; /* AENC - Reserved */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ unsigned device_type :5; /* Peripheral Device Type */ unsigned rmb :1; /* Removable Medium Bit */ unsigned reserved1_6t0 :7; /* Reserved */ unsigned iso_version :2; /* ISO Version */ unsigned ecma_version :3; /* ECMA Version */ unsigned ansi_version :3; /* ANSI Version */ unsigned reserved3_7 :1; /* AENC - Reserved */ unsigned reserved3_6 :1; /* TrmIOP - Reserved */ unsigned reserved3_45 :2; /* Reserved */ unsigned response_format :4; /* Response Data Format */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 additional_length; /* Additional Length (total_length-4) */ u8 rsv5, rsv6, rsv7; /* Reserved */ u8 vendor_id[8]; /* Vendor Identification */ u8 product_id[16]; /* Product Identification */ u8 revision_level[4]; /* Revision Level */ u8 vendor_specific[20]; /* Vendor Specific - Optional */ u8 reserved56t95[40]; /* Reserved - Optional */ /* Additional information may be returned */ } idefloppy_inquiry_result_t; /* * REQUEST SENSE packet command result - Data Format. */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned error_code :7; /* Current error (0x70) */ unsigned valid :1; /* The information field conforms to SFF-8070i */ u8 reserved1 :8; /* Reserved */ unsigned sense_key :4; /* Sense Key */ unsigned reserved2_4 :1; /* Reserved */ unsigned ili :1; /* Incorrect Length Indicator */ unsigned reserved2_67 :2; #elif defined(__BIG_ENDIAN_BITFIELD) unsigned valid :1; /* The information field conforms to SFF-8070i */ unsigned error_code :7; /* Current error (0x70) */ u8 reserved1 :8; /* Reserved */ unsigned reserved2_67 :2; unsigned ili :1; /* Incorrect Length Indicator */ unsigned reserved2_4 :1; /* Reserved */ unsigned sense_key :4; /* Sense Key */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u32 information __attribute__ ((packed)); u8 asl; /* Additional sense length (n-7) */ u32 command_specific; /* Additional command specific information */ u8 asc; /* Additional Sense Code */ u8 ascq; /* Additional Sense Code Qualifier */ u8 replaceable_unit_code; /* Field Replaceable Unit Code */ u8 sksv[3]; u8 pad[2]; /* Padding to 20 bytes */ } idefloppy_request_sense_result_t; /* * Pages of the SELECT SENSE / MODE SENSE packet commands. */ #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 /* * Mode Parameter Header for the MODE SENSE packet command */ typedef struct { u16 mode_data_length; /* Length of the following data transfer */ u8 medium_type; /* Medium Type */ #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned reserved3 :7; unsigned wp :1; /* Write protect */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned wp :1; /* Write protect */ unsigned reserved3 :7; #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 reserved[4]; } idefloppy_mode_parameter_header_t; static DECLARE_MUTEX(idefloppy_ref_sem); #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) #define ide_floppy_g(disk) \ container_of((disk)->private_data, struct ide_floppy_obj, driver) static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) { struct ide_floppy_obj *floppy = NULL; down(&idefloppy_ref_sem); floppy = ide_floppy_g(disk); if (floppy) kref_get(&floppy->kref); up(&idefloppy_ref_sem); return floppy; } static void ide_floppy_release(struct kref *); static void ide_floppy_put(struct ide_floppy_obj *floppy) { down(&idefloppy_ref_sem); kref_put(&floppy->kref, ide_floppy_release); up(&idefloppy_ref_sem); } /* * 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--) (void) HWIF(drive)->INB(IDE_DATA_REG); } #if IDEFLOPPY_DEBUG_BUGS static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) { while (bcount--) HWIF(drive)->OUTB(0, IDE_DATA_REG); } #endif /* IDEFLOPPY_DEBUG_BUGS */ /* * idefloppy_do_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 int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) { idefloppy_floppy_t *floppy = drive->driver_data; struct request *rq = HWGROUP(drive)->rq; int error; debug_log(KERN_INFO "Reached idefloppy_end_request\n"); switch (uptodate) { case 0: error = IDEFLOPPY_ERROR_GENERAL; break; case 1: error = 0; break; default: error = uptodate; } if (error) floppy->failed_pc = NULL; /* Why does this happen? */ if (!rq) return 0; if (!(rq->flags & REQ_SPECIAL)) { //if (!IDEFLOPPY_RQ_CMD (rq->cmd)) { /* our real local end request function */ ide_end_request(drive, uptodate, nsecs); return 0; } rq->errors = error; /* fixme: need to move this local also */ ide_end_drive_cmd(drive, 0, 0); return 0; } static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) { struct request *rq = pc->rq; struct bio_vec *bvec; struct bio *bio; unsigned long flags; char *data; int count, i, done = 0; rq_for_each_bio(bio, rq) { bio_for_each_segment(bvec, bio, i) { if (!bcount) break; count = min(bvec->bv_len, bcount); data = bvec_kmap_irq(bvec, &flags); drive->hwif->atapi_input_bytes(drive, data, count); bvec_kunmap_irq(data, &flags); bcount -= count; pc->b_count += count; done += count; } } idefloppy_do_end_request(drive, 1, done >> 9); if (bcount) { printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); idefloppy_discard_data(drive, bcount); } } static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) { struct request *rq = pc->rq; struct bio *bio; struct bio_vec *bvec; unsigned long flags; int count, i, done = 0; char *data; rq_for_each_bio(bio, rq) { bio_for_each_segment(bvec, bio, i) { if (!bcount) break; count = min(bvec->bv_len, bcount); data = bvec_kmap_irq(bvec, &flags); drive->hwif->atapi_output_bytes(drive, data, count); bvec_kunmap_irq(data, &flags); bcount -= count; pc->b_count += count; done += count; } } idefloppy_do_end_request(drive, 1, done >> 9); #if IDEFLOPPY_DEBUG_BUGS if (bcount) { printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); idefloppy_write_zeros(drive, bcount); } #endif } static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) { struct request *rq = pc->rq; struct bio *bio = rq->bio; while ((bio = rq->bio) != NULL) idefloppy_do_end_request(drive, 1, 0); } /* * 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) { struct ide_floppy_obj *floppy = drive->driver_data; ide_init_drive_cmd(rq); rq->buffer = (char *) pc; rq->flags = REQ_SPECIAL; //rq->cmd = IDEFLOPPY_PC_RQ; rq->rq_disk = floppy->disk; (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; floppy->progress_indication = result->sksv[0] & 0x80 ? (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; if (floppy->failed_pc) debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], result->sense_key, result->asc, result->ascq); else debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " "ascq = %x\n", result->sense_key, result->asc, result->ascq); } static void idefloppy_request_sense_callback (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); if (!floppy->pc->error) { idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); idefloppy_do_end_request(drive, 1, 0); } else { printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); idefloppy_do_end_request(drive, 0, 0); } } /* * General packet command callback function. */ static void idefloppy_pc_callback (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); } /* * 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->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; atapi_error_t error; error.all = HWIF(drive)->INB(IDE_ERROR_REG); pc = idefloppy_next_pc_storage(drive); rq = idefloppy_next_rq_storage(drive); idefloppy_create_request_sense_cmd(pc); idefloppy_queue_pc_head(drive, pc, rq); } /* * idefloppy_pc_intr is the usual interrupt handler which will be called * during a packet command. */ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; atapi_status_t status; atapi_bcount_t bcount; atapi_ireason_t ireason; idefloppy_pc_t *pc = floppy->pc; struct request *rq = pc->rq; unsigned int temp; debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", __FUNCTION__); if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { if (HWIF(drive)->ide_dma_end(drive)) { set_bit(PC_DMA_ERROR, &pc->flags); } else { pc->actually_transferred = pc->request_transfer; idefloppy_update_buffers(drive, pc); } debug_log(KERN_INFO "ide-floppy: DMA finished\n"); } /* Clear the interrupt */ status.all = HWIF(drive)->INB(IDE_STATUS_REG); if (!status.b.drq) { /* No more interrupts */ debug_log(KERN_INFO "Packet command completed, %d bytes " "transferred\n", pc->actually_transferred); clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); local_irq_enable(); if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { /* Error detected */ debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", drive->name); rq->errors++; if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { printk(KERN_ERR "ide-floppy: I/O error in " "request sense command\n"); return ide_do_reset(drive); } /* Retry operation */ idefloppy_retry_pc(drive); /* queued, but not started */ return ide_stopped; } pc->error = 0; if (floppy->failed_pc == pc) floppy->failed_pc = NULL; /* Command finished - Call the callback function */ pc->callback(drive); return ide_stopped; } if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { printk(KERN_ERR "ide-floppy: The floppy wants to issue " "more interrupts in DMA mode\n"); (void)__ide_dma_off(drive); return ide_do_reset(drive); } /* Get the number of bytes to transfer */ bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG); bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG); /* on this interrupt */ ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); if (ireason.b.cod) { printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); return ide_do_reset(drive); } if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) { /* Hopefully, we will never get here */ printk(KERN_ERR "ide-floppy: We wanted to %s, ", ireason.b.io ? "Write":"Read"); printk(KERN_ERR "but the floppy wants us to %s !\n", ireason.b.io ? "Read":"Write"); return ide_do_reset(drive); } if (!test_bit(PC_WRITING, &pc->flags)) { /* Reading - Check that we have enough space */ temp = pc->actually_transferred + bcount.all; if (temp > pc->request_transfer) { if (temp > pc->buffer_size) { printk(KERN_ERR "ide-floppy: The floppy wants " "to send us more data than expected " "- discarding data\n"); idefloppy_discard_data(drive,bcount.all); if (HWGROUP(drive)->handler != NULL) BUG(); ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); return ide_started; } debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " "send us more data than expected - " "allowing transfer\n"); } } if (test_bit(PC_WRITING, &pc->flags)) { if (pc->buffer != NULL) /* Write the current buffer */ HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all); else idefloppy_output_buffers(drive, pc, bcount.all); } else { if (pc->buffer != NULL) /* Read the current buffer */ HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all); else idefloppy_input_buffers(drive, pc, bcount.all); } /* Update the current position */ pc->actually_transferred += bcount.all; pc->current_position += bcount.all; if (HWGROUP(drive)->handler != NULL) BUG(); ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ return ide_started; } /* * This is the original routine that did the packet transfer. * It fails at high speeds on the Iomega ZIP drive, so there's a slower version * for that drive below. The algorithm is chosen based on drive type */ static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) { ide_startstop_t startstop; idefloppy_floppy_t *floppy = drive->driver_data; atapi_ireason_t ireason; if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { printk(KERN_ERR "ide-floppy: Strange, packet command " "initiated yet DRQ isn't asserted\n"); return startstop; } ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); if (!ireason.b.cod || ireason.b.io) { printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " "issuing a packet command\n"); return ide_do_reset(drive); } if (HWGROUP(drive)->handler != NULL) BUG(); /* Set the interrupt routine */ ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* Send the actual packet */ HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); return ide_started; } /* * What we have here is a classic case of a top half / bottom half * interrupt service routine. In interrupt mode, the device sends * an interrupt to signal it's ready to receive a packet. However, * we need to delay about 2-3 ticks before issuing the packet or we * gets in trouble. * * So, follow carefully. transfer_pc1 is called as an interrupt (or * directly). In either case, when the device says it's ready for a * packet, we schedule the packet transfer to occur about 2-3 ticks * later in transfer_pc2. */ static int idefloppy_transfer_pc2 (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; /* Send the actual packet */ HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); /* Timeout for the packet command */ return IDEFLOPPY_WAIT_CMD; } static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; ide_startstop_t startstop; atapi_ireason_t ireason; if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { printk(KERN_ERR "ide-floppy: Strange, packet command " "initiated yet DRQ isn't asserted\n"); return startstop; } ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); if (!ireason.b.cod || ireason.b.io) { printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " "while issuing a packet command\n"); return ide_do_reset(drive); } /* * The following delay solves a problem with ATAPI Zip 100 drives * where the Busy flag was apparently being deasserted before the * unit was ready to receive data. This was happening on a * 1200 MHz Athlon system. 10/26/01 25msec is too short, * 40 and 50msec work well. idefloppy_pc_intr will not be actually * used until after the packet is moved in about 50 msec. */ if (HWGROUP(drive)->handler != NULL) BUG(); ide_set_handler(drive, &idefloppy_pc_intr, /* service routine for packet command */ floppy->ticks, /* wait this long before "failing" */ &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ return ide_started; } /** * idefloppy_should_report_error() * * Supresses error messages resulting from Medium not present */ static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) { if (floppy->sense_key == 0x02 && floppy->asc == 0x3a && floppy->ascq == 0x00) return 0; return 1; } /* * Issue a packet command */ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) { idefloppy_floppy_t *floppy = drive->driver_data; ide_hwif_t *hwif = drive->hwif; atapi_feature_t feature; atapi_bcount_t bcount; ide_handler_t *pkt_xfer_routine; #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone and have lived on another thread's stack; that stack may have become unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */ #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 */ #endif if (floppy->failed_pc == NULL && pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) floppy->failed_pc = pc; /* Set the current packet command */ floppy->pc = pc; 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)) { if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { if (idefloppy_should_report_error(floppy)) 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); } /* Giving up */ pc->error = IDEFLOPPY_ERROR_GENERAL; } floppy->failed_pc = NULL; pc->callback(drive); return ide_stopped; } debug_log(KERN_INFO "Retry number - %d\n",pc->retries); pc->retries++; /* We haven't transferred any data yet */ pc->actually_transferred = 0; pc->current_position = pc->buffer; bcount.all = min(pc->request_transfer, 63 * 1024); if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) { (void)__ide_dma_off(drive); } feature.all = 0; if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) feature.b.dma = !hwif->dma_setup(drive); if (IDE_CONTROL_REG) HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); /* Use PIO/DMA */ HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG); HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG); HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG); HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); if (feature.b.dma) { /* Begin DMA, if necessary */ set_bit(PC_DMA_IN_PROGRESS, &pc->flags); hwif->dma_start(drive); } /* Can we transfer the packet when we get the interrupt or wait? */ if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { /* wait */ pkt_xfer_routine = &idefloppy_transfer_pc1; } else { /* immediate */ pkt_xfer_routine = &idefloppy_transfer_pc; } if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { /* Issue the packet command */ ide_execute_command(drive, WIN_PACKETCMD, pkt_xfer_routine, IDEFLOPPY_WAIT_CMD, NULL); return ide_started; } else { /* Issue the packet command */ HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); return (*pkt_xfer_routine) (drive); } } static void idefloppy_rw_callback (ide_drive_t *drive) { debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); idefloppy_do_end_request(drive, 1, 0); return; } static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) { debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " "prevent = %d\n", prevent); idefloppy_init_pc(pc); pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; pc->c[4] = prevent; } static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) { idefloppy_init_pc(pc); pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; pc->c[7] = 255; pc->c[8] = 255; pc->request_transfer = 255; } static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, int flags) { idefloppy_init_pc(pc); pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; pc->c[1] = 0x17; memset(pc->buffer, 0, 12); pc->buffer[1] = 0xA2; /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ if (flags & 1) /* Verify bit on... */ pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ pc->buffer[3] = 8; put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); pc->buffer_size=12; set_bit(PC_WRITING, &pc->flags); } /* * A mode sense command is used to "sense" floppy parameters. */ static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) { u16 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), (u16 *) &pc->c[7]); pc->request_transfer = length; } static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) { idefloppy_init_pc(pc); pc->c[0] = IDEFLOPPY_START_STOP_CMD; pc->c[4] = start; } static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) { idefloppy_init_pc(pc); pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; } static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) { int block = sector / floppy->bs_factor; int blocks = rq->nr_sectors / floppy->bs_factor; int cmd = rq_data_dir(rq); debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), block, blocks); idefloppy_init_pc(pc); if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); } else { pc->c[0] = 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_count = cmd == READ ? 0 : rq->bio->bi_size; if (rq->flags & REQ_RW) 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); } static int idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) { /* * just support eject for now, it would not be hard to make the * REQ_BLOCK_PC support fully-featured */ if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD) return 1; idefloppy_init_pc(pc); memcpy(pc->c, rq->cmd, sizeof(pc->c)); return 0; } /* * idefloppy_do_request is our request handling function. */ static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t *pc; unsigned long block = (unsigned long)block_s; debug_log(KERN_INFO "rq_status: %d, dev: %s, flags: %lx, errors: %d\n", rq->rq_status, rq->rq_disk ? rq->rq_disk->disk_name ? "?", rq->flags, rq->errors); debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " "current_nr_sectors: %d\n", (long)rq->sector, rq->nr_sectors, rq->current_nr_sectors); if (rq->errors >= ERROR_MAX) { if (floppy->failed_pc != NULL) { if (idefloppy_should_report_error(floppy)) printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," " key = %2x, asc = %2x, ascq = %2x\n", drive->name, floppy->failed_pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq); } else printk(KERN_ERR "ide-floppy: %s: I/O error\n", drive->name); idefloppy_do_end_request(drive, 0, 0); return ide_stopped; } if (rq->flags & REQ_CMD) { if (((long)rq->sector % floppy->bs_factor) || (rq->nr_sectors % floppy->bs_factor)) { printk("%s: unsupported r/w request size\n", drive->name); idefloppy_do_end_request(drive, 0, 0); return ide_stopped; } pc = idefloppy_next_pc_storage(drive); idefloppy_create_rw_cmd(floppy, pc, rq, block); } else if (rq->flags & REQ_SPECIAL) { pc = (idefloppy_pc_t *) rq->buffer; } else if (rq->flags & REQ_BLOCK_PC) { pc = idefloppy_next_pc_storage(drive); if (idefloppy_blockpc_cmd(floppy, pc, rq)) { idefloppy_do_end_request(drive, 0, 0); return ide_stopped; } } else { blk_dump_rq_flags(rq, "ide-floppy: unsupported command in queue"); idefloppy_do_end_request(drive, 0, 0); return ide_stopped; } pc->rq = rq; return idefloppy_issue_pc(drive, pc); } /* * idefloppy_queue_pc_tail adds a special packet command request to the * tail of the request queue, and waits for it to be serviced. */ static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) { struct ide_floppy_obj *floppy = drive->driver_data; struct request rq; ide_init_drive_cmd (&rq); rq.buffer = (char *) pc; rq.flags = REQ_SPECIAL; // rq.cmd = IDEFLOPPY_PC_RQ; rq.rq_disk = floppy->disk; return ide_do_drive_cmd(drive, &rq, ide_wait); } /* * Look at the flexible disk page parameters. We will ignore the CHS * capacity parameters and use the LBA parameters instead. */ static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; idefloppy_mode_parameter_header_t *header; idefloppy_flexible_disk_page_t *page; int capacity, lba_capacity; idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); if (idefloppy_queue_pc_tail(drive,&pc)) { printk(KERN_ERR "ide-floppy: Can't get flexible disk " "page parameters\n"); return 1; } header = (idefloppy_mode_parameter_header_t *) pc.buffer; floppy->wp = header->wp; set_disk_ro(floppy->disk, floppy->wp); page = (idefloppy_flexible_disk_page_t *) (header + 1); page->transfer_rate = ntohs(page->transfer_rate); page->sector_size = ntohs(page->sector_size); page->cyls = ntohs(page->cyls); page->rpm = ntohs(page->rpm); capacity = page->cyls * page->heads * page->sectors * page->sector_size; if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " "%d sector size, %d rpm\n", drive->name, capacity / 1024, page->cyls, page->heads, page->sectors, page->transfer_rate / 8, page->sector_size, page->rpm); floppy->flexible_disk_page = *page; drive->bios_cyl = page->cyls; drive->bios_head = page->heads; drive->bios_sect = page->sectors; lba_capacity = floppy->blocks * floppy->block_size; if (capacity < lba_capacity) { printk(KERN_NOTICE "%s: The disk reports a capacity of %d " "bytes, but the drive only handles %d\n", drive->name, lba_capacity, capacity); floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; } return 0; } static int idefloppy_get_capability_page(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; idefloppy_mode_parameter_header_t *header; idefloppy_capabilities_page_t *page; floppy->srfp = 0; idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, MODE_SENSE_CURRENT); set_bit(PC_SUPPRESS_ERROR, &pc.flags); if (idefloppy_queue_pc_tail(drive,&pc)) { return 1; } header = (idefloppy_mode_parameter_header_t *) pc.buffer; page= (idefloppy_capabilities_page_t *)(header+1); floppy->srfp = page->srfp; return (0); } /* * Determine if a media is present in the floppy drive, and if so, * its LBA capacity. */ static int idefloppy_get_capacity (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; idefloppy_capacity_header_t *header; idefloppy_capacity_descriptor_t *descriptor; int i, descriptors, rc = 1, blocks, length; drive->bios_cyl = 0; drive->bios_head = drive->bios_sect = 0; floppy->blocks = floppy->bs_factor = 0; set_capacity(floppy->disk, 0); idefloppy_create_read_capacity_cmd(&pc); if (idefloppy_queue_pc_tail(drive, &pc)) { printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); return 1; } header = (idefloppy_capacity_header_t *) pc.buffer; descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); for (i = 0; i < descriptors; i++, descriptor++) { blocks = descriptor->blocks = ntohl(descriptor->blocks); length = descriptor->length = ntohs(descriptor->length); if (!i) { switch (descriptor->dc) { /* Clik! drive returns this instead of CAPACITY_CURRENT */ case CAPACITY_UNFORMATTED: if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) /* * If it is not a clik drive, break out * (maintains previous driver behaviour) */ break; case CAPACITY_CURRENT: /* Normal Zip/LS-120 disks */ 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_NOTICE "%s: %d bytes block size " "not supported\n", drive->name, length); } else { floppy->blocks = blocks; floppy->block_size = length; if ((floppy->bs_factor = length / 512) != 1) printk(KERN_NOTICE "%s: warning: non " "512 bytes block size not " "fully supported\n", drive->name); rc = 0; } break; case CAPACITY_NO_CARTRIDGE: /* * This is a KERN_ERR so it appears on screen * for the user to see */ printk(KERN_ERR "%s: No disk in drive\n", drive->name); break; case CAPACITY_INVALID: printk(KERN_ERR "%s: Invalid capacity for disk " "in drive\n", drive->name); break; } } if (!i) { debug_log( "Descriptor 0 Code: %d\n", descriptor->dc); } debug_log( "Descriptor %d: %dkB, %d blocks, %d " "sector size\n", i, blocks * length / 1024, blocks, length); } /* Clik! disk does not support get_flexible_disk_page */ if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { (void) idefloppy_get_flexible_disk_page(drive); } set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); return rc; } /* ** Obtain the list of formattable capacities. ** Very similar to idefloppy_get_capacity, except that we push the capacity ** descriptors to userland, instead of our own structures. ** ** Userland gives us the following structure: ** ** struct idefloppy_format_capacities { ** int nformats; ** struct { ** int nblocks; ** int blocksize; ** } formats[]; ** } ; ** ** userland initializes nformats to the number of allocated formats[] ** records. On exit we set nformats to the number of records we've ** actually initialized. ** */ static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) { idefloppy_pc_t pc; idefloppy_capacity_header_t *header; idefloppy_capacity_descriptor_t *descriptor; int i, descriptors, blocks, length; int u_array_size; int u_index; int __user *argp; if (get_user(u_array_size, arg)) return (-EFAULT); if (u_array_size <= 0) return (-EINVAL); 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 (-EIO); } header = (idefloppy_capacity_header_t *) pc.buffer; descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); u_index = 0; argp = arg + 1; /* ** We always skip the first capacity descriptor. That's the ** current capacity. We are interested in the remaining descriptors, ** the formattable capacities. */ for (i=0; i<descriptors; i++, descriptor++) { if (u_index >= u_array_size) break; /* User-supplied buffer too small */ if (i == 0) continue; /* Skip the first descriptor */ blocks = ntohl(descriptor->blocks); length = ntohs(descriptor->length); if (put_user(blocks, argp)) return(-EFAULT); ++argp; if (put_user(length, argp)) return (-EFAULT); ++argp; ++u_index; } if (put_user(u_index, arg)) return (-EFAULT); return (0); } /* ** Send ATAPI_FORMAT_UNIT to the drive. ** ** Userland gives us the following structure: ** ** struct idefloppy_format_command { ** int nblocks; ** int blocksize; ** int flags; ** } ; ** ** flags is a bitmask, currently, the only defined flag is: ** ** 0x01 - verify media after format. */ static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) { int blocks; int length; int flags; idefloppy_pc_t pc; if (get_user(blocks, arg) || get_user(length, arg+1) || get_user(flags, arg+2)) { return (-EFAULT); } /* Get the SFRP bit */ (void) idefloppy_get_capability_page(drive); idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); if (idefloppy_queue_pc_tail(drive, &pc)) { return (-EIO); } return (0); } /* ** Get ATAPI_FORMAT_UNIT progress indication. ** ** Userland gives a pointer to an int. The int is set to a progresss ** indicator 0-65536, with 65536=100%. ** ** If the drive does not support format progress indication, we just check ** the dsc bit, and return either 0 or 65536. */ static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; int progress_indication = 0x10000; if (floppy->srfp) { idefloppy_create_request_sense_cmd(&pc); if (idefloppy_queue_pc_tail(drive, &pc)) { return (-EIO); } if (floppy->sense_key == 2 && floppy->asc == 4 && floppy->ascq == 4) { progress_indication = floppy->progress_indication; } /* Else assume format_unit has finished, and we're ** at 0x10000 */ } else { atapi_status_t status; unsigned long flags; local_irq_save(flags); status.all = HWIF(drive)->INB(IDE_STATUS_REG); local_irq_restore(flags); progress_indication = !status.b.dsc ? 0 : 0x10000; } if (put_user(progress_indication, arg)) return (-EFAULT); return (0); } /* * Return the current floppy capacity. */ static sector_t idefloppy_capacity (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; unsigned long capacity = floppy->blocks * floppy->bs_factor; return capacity; } /* * idefloppy_identify_device checks if we can support a drive, * based on the ATAPI IDENTIFY command results. */ static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) { struct idefloppy_id_gcw gcw; #if IDEFLOPPY_DEBUG_INFO u16 mask,i; char buffer[80]; #endif /* IDEFLOPPY_DEBUG_INFO */ *((u16 *) &gcw) = id->config; #ifdef CONFIG_PPC /* kludge for Apple PowerBook internal zip */ if ((gcw.device_type == 5) && !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) gcw.device_type = 0; #endif #if IDEFLOPPY_DEBUG_INFO printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); switch (gcw.protocol) { case 0: case 1: sprintf(buffer, "ATA");break; case 2: sprintf(buffer, "ATAPI");break; case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; } printk(KERN_INFO "Protocol Type: %s\n", buffer); switch (gcw.device_type) { case 0: sprintf(buffer, "Direct-access Device");break; case 1: sprintf(buffer, "Streaming Tape Device");break; case 2: case 3: case 4: sprintf (buffer, "Reserved");break; case 5: sprintf(buffer, "CD-ROM Device");break; case 6: sprintf(buffer, "Reserved"); case 7: sprintf(buffer, "Optical memory Device");break; case 0x1f: sprintf(buffer, "Unknown or no Device type");break; default: sprintf(buffer, "Reserved"); } printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); switch (gcw.drq_type) { case 0: sprintf(buffer, "Microprocessor DRQ");break; case 1: sprintf(buffer, "Interrupt DRQ");break; case 2: sprintf(buffer, "Accelerated DRQ");break; case 3: sprintf(buffer, "Reserved");break; } printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); switch (gcw.packet_size) { case 0: sprintf(buffer, "12 bytes");break; case 1: sprintf(buffer, "16 bytes");break; default: sprintf(buffer, "Reserved");break; } printk(KERN_INFO "Command Packet Size: %s\n", buffer); printk(KERN_INFO "Model: %.40s\n",id->model); printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev); printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no); printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512); printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n"); printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n"); printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n"); printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n"); printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n"); printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO); printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA); printk(KERN_INFO "Single Word DMA supported modes:\n"); for (i=0,mask=1;i<8;i++,mask=mask << 1) { if (id->dma_1word & mask) printk(KERN_INFO " Mode %d%s\n", i, (id->dma_1word & (mask << 8)) ? " (active)" : ""); } printk(KERN_INFO "Multi Word DMA supported modes:\n"); for (i=0,mask=1;i<8;i++,mask=mask << 1) { if (id->dma_mword & mask) printk(KERN_INFO " Mode %d%s\n", i, (id->dma_mword & (mask << 8)) ? " (active)" : ""); } if (id->field_valid & 0x0002) { printk(KERN_INFO "Enhanced PIO Modes: %s\n", id->eide_pio_modes & 1 ? "Mode 3":"None"); if (id->eide_dma_min == 0) sprintf(buffer, "Not supported"); else sprintf(buffer, "%d ns",id->eide_dma_min); printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer); if (id->eide_dma_time == 0) sprintf(buffer, "Not supported"); else sprintf(buffer, "%d ns",id->eide_dma_time); printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer); if (id->eide_pio == 0) sprintf(buffer, "Not supported"); else sprintf(buffer, "%d ns",id->eide_pio); printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n", buffer); if (id->eide_pio_iordy == 0) sprintf(buffer, "Not supported"); else sprintf(buffer, "%d ns",id->eide_pio_iordy); printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer); } else printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n"); #endif /* IDEFLOPPY_DEBUG_INFO */ if (gcw.protocol != 2) printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); else if (gcw.device_type != 0) printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); else if (!gcw.removable) printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); else if (gcw.drq_type == 3) { printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); } else if (gcw.packet_size != 0) { printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); } else return 1; return 0; } static void idefloppy_add_settings(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; /* * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function */ ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); } /* * Driver initialization. */ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) { struct idefloppy_id_gcw gcw; *((u16 *) &gcw) = drive->id->config; floppy->pc = floppy->pc_stack; if (gcw.drq_type == 1) set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); /* * We used to check revisions here. At this point however * I'm giving up. Just assume they are all broken, its easier. * * The actual reason for the workarounds was likely * a driver bug after all rather than a firmware bug, * and the workaround below used to hide it. It should * be fixed as of version 1.9, but to be on the safe side * we'll leave the limitation below for the 2.2.x tree. */ if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); /* This value will be visible in the /proc/ide/hdx/settings */ floppy->ticks = IDEFLOPPY_TICKS_DELAY; blk_queue_max_sectors(drive->queue, 64); } /* * Guess what? The IOMEGA Clik! drive also needs the * above fix. It makes nasty clicking noises without * it, so please don't remove this. */ if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { blk_queue_max_sectors(drive->queue, 64); set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); } (void) idefloppy_get_capacity(drive); idefloppy_add_settings(drive); } static int ide_floppy_remove(struct device *dev) { ide_drive_t *drive = to_ide_device(dev); idefloppy_floppy_t *floppy = drive->driver_data; struct gendisk *g = floppy->disk; ide_unregister_subdriver(drive, floppy->driver); del_gendisk(g); ide_floppy_put(floppy); return 0; } static void ide_floppy_release(struct kref *kref) { struct ide_floppy_obj *floppy = to_ide_floppy(kref); ide_drive_t *drive = floppy->drive; struct gendisk *g = floppy->disk; drive->driver_data = NULL; g->private_data = NULL; put_disk(g); kfree(floppy); } #ifdef CONFIG_PROC_FS static int proc_idefloppy_read_capacity (char *page, char **start, off_t off, int count, int *eof, void *data) { ide_drive_t*drive = (ide_drive_t *)data; int len; len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } static ide_proc_entry_t idefloppy_proc[] = { { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, { NULL, 0, NULL, NULL } }; #else #define idefloppy_proc NULL #endif /* CONFIG_PROC_FS */ static int ide_floppy_probe(struct device *); static ide_driver_t idefloppy_driver = { .owner = THIS_MODULE, .gen_driver = { .name = "ide-floppy", .bus = &ide_bus_type, .probe = ide_floppy_probe, .remove = ide_floppy_remove, }, .version = IDEFLOPPY_VERSION, .media = ide_floppy, .supports_dsc_overlap = 0, .do_request = idefloppy_do_request, .end_request = idefloppy_do_end_request, .error = __ide_error, .abort = __ide_abort, .proc = idefloppy_proc, }; static int idefloppy_open(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; struct ide_floppy_obj *floppy; ide_drive_t *drive; idefloppy_pc_t pc; int ret = 0; debug_log(KERN_INFO "Reached idefloppy_open\n"); if (!(floppy = ide_floppy_get(disk))) return -ENXIO; drive = floppy->drive; drive->usage++; if (drive->usage == 1) { clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); /* Just in case */ idefloppy_create_test_unit_ready_cmd(&pc); if (idefloppy_queue_pc_tail(drive, &pc)) { idefloppy_create_start_stop_cmd(&pc, 1); (void) idefloppy_queue_pc_tail(drive, &pc); } if (idefloppy_get_capacity (drive) && (filp->f_flags & O_NDELAY) == 0 /* ** Allow O_NDELAY to open a drive without a disk, or with ** an unreadable disk, so that we can get the format ** capacity of the drive or begin the format - Sam */ ) { drive->usage--; ret = -EIO; goto out_put_floppy; } if (floppy->wp && (filp->f_mode & 2)) { drive->usage--; ret = -EROFS; goto out_put_floppy; } set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); /* IOMEGA Clik! drives do not support lock/unlock commands */ if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { idefloppy_create_prevent_cmd(&pc, 1); (void) idefloppy_queue_pc_tail(drive, &pc); } check_disk_change(inode->i_bdev); } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { drive->usage--; ret = -EBUSY; goto out_put_floppy; } return 0; out_put_floppy: ide_floppy_put(floppy); return ret; } static int idefloppy_release(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; struct ide_floppy_obj *floppy = ide_floppy_g(disk); ide_drive_t *drive = floppy->drive; idefloppy_pc_t pc; debug_log(KERN_INFO "Reached idefloppy_release\n"); if (drive->usage == 1) { /* IOMEGA Clik! drives do not support lock/unlock commands */ if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { idefloppy_create_prevent_cmd(&pc, 0); (void) idefloppy_queue_pc_tail(drive, &pc); } clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); } drive->usage--; ide_floppy_put(floppy); return 0; } static int idefloppy_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct block_device *bdev = inode->i_bdev; struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); ide_drive_t *drive = floppy->drive; void __user *argp = (void __user *)arg; int err; int prevent = (arg) ? 1 : 0; idefloppy_pc_t pc; switch (cmd) { case CDROMEJECT: prevent = 0; /* fall through */ case CDROM_LOCKDOOR: if (drive->usage > 1) return -EBUSY; /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { idefloppy_create_prevent_cmd(&pc, prevent); (void) idefloppy_queue_pc_tail(drive, &pc); } if (cmd == CDROMEJECT) { idefloppy_create_start_stop_cmd(&pc, 2); (void) idefloppy_queue_pc_tail(drive, &pc); } return 0; case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: return 0; case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: return idefloppy_get_format_capacities(drive, argp); case IDEFLOPPY_IOCTL_FORMAT_START: if (!(file->f_mode & 2)) return -EPERM; if (drive->usage > 1) { /* Don't format if someone is using the disk */ clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); return -EBUSY; } set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); err = idefloppy_begin_format(drive, argp); if (err) clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); return err; /* ** Note, the bit will be cleared when the device is ** closed. This is the cleanest way to handle the ** situation where the drive does not support ** format progress reporting. */ case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: return idefloppy_get_format_progress(drive, argp); } return generic_ide_ioctl(drive, file, bdev, cmd, arg); } static int idefloppy_media_changed(struct gendisk *disk) { struct ide_floppy_obj *floppy = ide_floppy_g(disk); ide_drive_t *drive = floppy->drive; /* do not scan partitions twice if this is a removable device */ if (drive->attach) { drive->attach = 0; return 0; } return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); } static int idefloppy_revalidate_disk(struct gendisk *disk) { struct ide_floppy_obj *floppy = ide_floppy_g(disk); set_capacity(disk, idefloppy_capacity(floppy->drive)); return 0; } static struct block_device_operations idefloppy_ops = { .owner = THIS_MODULE, .open = idefloppy_open, .release = idefloppy_release, .ioctl = idefloppy_ioctl, .media_changed = idefloppy_media_changed, .revalidate_disk= idefloppy_revalidate_disk }; static int ide_floppy_probe(struct device *dev) { ide_drive_t *drive = to_ide_device(dev); idefloppy_floppy_t *floppy; struct gendisk *g; if (!strstr("ide-floppy", drive->driver_req)) goto failed; if (!drive->present) goto failed; if (drive->media != ide_floppy) goto failed; if (!idefloppy_identify_device (drive, drive->id)) { printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); goto failed; } if (drive->scsi) { printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); goto failed; } if ((floppy = (idefloppy_floppy_t *) kzalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); goto failed; } g = alloc_disk(1 << PARTN_BITS); if (!g) goto out_free_floppy; ide_init_disk(g, drive); ide_register_subdriver(drive, &idefloppy_driver); kref_init(&floppy->kref); floppy->drive = drive; floppy->driver = &idefloppy_driver; floppy->disk = g; g->private_data = &floppy->driver; drive->driver_data = floppy; idefloppy_setup (drive, floppy); g->minors = 1 << PARTN_BITS; g->driverfs_dev = &drive->gendev; strcpy(g->devfs_name, drive->devfs_name); g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; g->fops = &idefloppy_ops; drive->attach = 1; add_disk(g); return 0; out_free_floppy: kfree(floppy); failed: return -ENODEV; } MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); static void __exit idefloppy_exit (void) { driver_unregister(&idefloppy_driver.gen_driver); } /* * idefloppy_init will register the driver for each floppy. */ static int idefloppy_init (void) { printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); return driver_register(&idefloppy_driver.gen_driver); } module_init(idefloppy_init); module_exit(idefloppy_exit); MODULE_LICENSE("GPL");