diff options
Diffstat (limited to 'drivers/ide/ide-floppy.c')
| -rw-r--r-- | drivers/ide/ide-floppy.c | 2211 |
1 files changed, 2211 insertions, 0 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c new file mode 100644 index 00000000000..36c0b74a4e4 --- /dev/null +++ b/drivers/ide/ide-floppy.c @@ -0,0 +1,2211 @@ +/* + * 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 3 /* default delay for ZIP 100 */ + +/* + * 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 (bcount) { + printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); + idefloppy_write_zeros(drive, bcount); + } +} + +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 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; + /* 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 idefloppy_cleanup (ide_drive_t *drive) +{ + idefloppy_floppy_t *floppy = drive->driver_data; + struct gendisk *g = floppy->disk; + + if (ide_unregister_subdriver(drive)) + return 1; + + 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 idefloppy_attach(ide_drive_t *drive); + +/* + * IDE subdriver functions, registered with ide.c + */ +static ide_driver_t idefloppy_driver = { + .owner = THIS_MODULE, + .name = "ide-floppy", + .version = IDEFLOPPY_VERSION, + .media = ide_floppy, + .busy = 0, + .supports_dsc_overlap = 0, + .cleanup = idefloppy_cleanup, + .do_request = idefloppy_do_request, + .end_request = idefloppy_do_end_request, + .error = __ide_error, + .abort = __ide_abort, + .proc = idefloppy_proc, + .attach = idefloppy_attach, + .drives = LIST_HEAD_INIT(idefloppy_driver.drives), +}; + +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 = generic_ide_ioctl(drive, file, bdev, cmd, arg); + int prevent = (arg) ? 1 : 0; + idefloppy_pc_t pc; + if (err != -EINVAL) + return err; + + 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 -EINVAL; +} + +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 idefloppy_attach (ide_drive_t *drive) +{ + 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 *) kmalloc (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); + + if (ide_register_subdriver(drive, &idefloppy_driver)) { + printk (KERN_ERR "ide-floppy: %s: Failed to register the driver with ide.c\n", drive->name); + goto out_put_disk; + } + + memset(floppy, 0, sizeof(*floppy)); + + kref_init(&floppy->kref); + + floppy->drive = drive; + floppy->driver = &idefloppy_driver; + floppy->disk = g; + + g->private_data = &floppy->driver; + + drive->driver_data = floppy; + + DRIVER(drive)->busy++; + idefloppy_setup (drive, floppy); + DRIVER(drive)->busy--; + 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_put_disk: + put_disk(g); +out_free_floppy: + kfree(floppy); +failed: + return 1; +} + +MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); + +static void __exit idefloppy_exit (void) +{ + ide_unregister_driver(&idefloppy_driver); +} + +/* + * idefloppy_init will register the driver for each floppy. + */ +static int idefloppy_init (void) +{ + printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); + ide_register_driver(&idefloppy_driver); + return 0; +} + +module_init(idefloppy_init); +module_exit(idefloppy_exit); +MODULE_LICENSE("GPL"); |