/* * linux/drivers/block/ide-floppy.c Version 0.9 Jul 4, 1999 * * Copyright (C) 1996 - 1999 Gadi Oxman */ /* * IDE ATAPI floppy driver. * * The driver currently doesn't have any fancy features, just the bare * minimum read/write support. * * Many thanks to Lode Leroy , 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 for pointing this out. * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by * */ #define IDEFLOPPY_VERSION "0.91" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ide.h" #include #include #include #include #include #include /* * The following are used to debug the driver. */ #define IDEFLOPPY_DEBUG_LOG 0 #define IDEFLOPPY_DEBUG_INFO 0 #define IDEFLOPPY_DEBUG_BUGS 1 /* * Some drives require a longer irq timeout. */ #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) /* * After each failed packet command we issue a request sense command * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. */ #define IDEFLOPPY_MAX_PC_RETRIES 3 /* * With each packet command, we allocate a buffer of * IDEFLOPPY_PC_BUFFER_SIZE bytes. */ #define IDEFLOPPY_PC_BUFFER_SIZE 256 /* * In various places in the driver, we need to allocate storage * for packet commands and requests, which will remain valid while * we leave the driver to wait for an interrupt or a timeout event. */ #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) /* * Our view of a packet command. */ typedef struct idefloppy_packet_command_s { u8 c[12]; /* Actual packet bytes */ int retries; /* On each retry, we increment retries */ int error; /* Error code */ int request_transfer; /* Bytes to transfer */ int actually_transferred; /* Bytes actually transferred */ int buffer_size; /* Size of our data buffer */ char *b_data; /* Pointer which runs on the buffers */ int b_count; /* Missing/Available data on the current buffer */ struct request *rq; /* The corresponding request */ byte *buffer; /* Data buffer */ byte *current_position; /* Pointer into the above buffer */ void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ byte pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ unsigned int flags; /* Status/Action bit flags */ } idefloppy_pc_t; /* * Packet command flag bits. */ #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ #define PC_WRITING 5 /* Data direction */ /* * Removable Block Access Capabilities Page */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned page_code :6; /* Page code - Should be 0x1b */ unsigned reserved1_6 :1; /* Reserved */ unsigned ps :1; /* Should be 0 */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned ps :1; /* Should be 0 */ unsigned reserved1_6 :1; /* Reserved */ unsigned page_code :6; /* Page code - Should be 0x1b */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 page_length; /* Page Length - Should be 0xa */ #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned reserved2 :6; unsigned srfp :1; /* Supports reporting progress of format */ unsigned sflp :1; /* System floppy type device */ unsigned tlun :3; /* Total logical units supported by the device */ unsigned reserved3 :3; unsigned sml :1; /* Single / Multiple lun supported */ unsigned ncd :1; /* Non cd optical device */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned sflp :1; /* System floppy type device */ unsigned srfp :1; /* Supports reporting progress of format */ unsigned reserved2 :6; unsigned ncd :1; /* Non cd optical device */ unsigned sml :1; /* Single / Multiple lun supported */ unsigned reserved3 :3; unsigned tlun :3; /* Total logical units supported by the device */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 reserved[8]; } idefloppy_capabilities_page_t; /* * Flexible disk page. */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned page_code :6; /* Page code - Should be 0x5 */ unsigned reserved1_6 :1; /* Reserved */ unsigned ps :1; /* The device is capable of saving the page */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned ps :1; /* The device is capable of saving the page */ unsigned reserved1_6 :1; /* Reserved */ unsigned page_code :6; /* Page code - Should be 0x5 */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 page_length; /* Page Length - Should be 0x1e */ u16 transfer_rate; /* In kilobits per second */ u8 heads, sectors; /* Number of heads, Number of sectors per track */ u16 sector_size; /* Byes per sector */ u16 cyls; /* Number of cylinders */ u8 reserved10[10]; u8 motor_delay; /* Motor off delay */ u8 reserved21[7]; u16 rpm; /* Rotations per minute */ u8 reserved30[2]; } idefloppy_flexible_disk_page_t; /* * Format capacity */ typedef struct { u8 reserved[3]; u8 length; /* Length of the following descriptors in bytes */ } idefloppy_capacity_header_t; typedef struct { u32 blocks; /* Number of blocks */ #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned dc :2; /* Descriptor Code */ unsigned reserved :6; #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved :6; unsigned dc :2; /* Descriptor Code */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 length_msb; /* Block Length (MSB)*/ u16 length; /* Block Length */ } idefloppy_capacity_descriptor_t; #define CAPACITY_INVALID 0x00 #define CAPACITY_UNFORMATTED 0x01 #define CAPACITY_CURRENT 0x02 #define CAPACITY_NO_CARTRIDGE 0x03 /* * Most of our global data which we need to save even as we leave the * driver due to an interrupt or a timer event is stored in a variable * of type idefloppy_floppy_t, defined below. */ typedef struct { ide_drive_t *drive; idefloppy_pc_t *pc; /* Current packet command */ idefloppy_pc_t *failed_pc; /* Last failed packet command */ idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];/* Packet command stack */ int pc_stack_index; /* Next free packet command storage space */ struct request rq_stack[IDEFLOPPY_PC_STACK]; int rq_stack_index; /* We implement a circular array */ /* * Last error information */ byte sense_key, asc, ascq; /* * Device information */ int blocks, block_size, bs_factor; /* Current format */ idefloppy_capacity_descriptor_t capacity; /* Last format capacity */ idefloppy_flexible_disk_page_t flexible_disk_page; /* Copy of the flexible disk page */ int wp; /* Write protect */ unsigned int flags; /* Status/Action flags */ } idefloppy_floppy_t; /* * Floppy flag bits values. */ #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ /* * ATAPI floppy drive packet commands */ #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 #define IDEFLOPPY_INQUIRY_CMD 0x12 #define IDEFLOPPY_MODE_SELECT_CMD 0x55 #define IDEFLOPPY_MODE_SENSE_CMD 0x5a #define IDEFLOPPY_READ10_CMD 0x28 #define IDEFLOPPY_READ12_CMD 0xa8 #define IDEFLOPPY_READ_CAPACITY_CMD 0x23 #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e #define IDEFLOPPY_SEEK_CMD 0x2b #define IDEFLOPPY_START_STOP_CMD 0x1b #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 #define IDEFLOPPY_VERIFY_CMD 0x2f #define IDEFLOPPY_WRITE10_CMD 0x2a #define IDEFLOPPY_WRITE12_CMD 0xaa #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e /* * Defines for the mode sense command */ #define MODE_SENSE_CURRENT 0x00 #define MODE_SENSE_CHANGEABLE 0x01 #define MODE_SENSE_DEFAULT 0x02 #define MODE_SENSE_SAVED 0x03 /* * Special requests for our block device strategy routine. */ #define IDEFLOPPY_FIRST_RQ 90 /* * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue. */ #define IDEFLOPPY_PC_RQ 90 #define IDEFLOPPY_LAST_RQ 90 /* * A macro which can be used to check if a given request command * originated in the driver or in the buffer cache layer. */ #define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ)) /* * Error codes which are returned in rq->errors to the higher part * of the driver. */ #define IDEFLOPPY_ERROR_GENERAL 101 /* * The ATAPI Status Register. */ typedef union { unsigned all :8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned check :1; /* Error occurred */ unsigned idx :1; /* Reserved */ unsigned corr :1; /* Correctable error occurred */ unsigned drq :1; /* Data is request by the device */ unsigned dsc :1; /* Media access command finished */ unsigned reserved5 :1; /* Reserved */ unsigned drdy :1; /* Ignored for ATAPI commands (ready to accept ATA command) */ unsigned bsy :1; /* The device has access to the command block */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned bsy :1; /* The device has access to the command block */ unsigned drdy :1; /* Ignored for ATAPI commands (ready to accept ATA command) */ unsigned reserved5 :1; /* Reserved */ unsigned dsc :1; /* Media access command finished */ unsigned drq :1; /* Data is request by the device */ unsigned corr :1; /* Correctable error occurred */ unsigned idx :1; /* Reserved */ unsigned check :1; /* Error occurred */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_status_reg_t; /* * The ATAPI error register. */ typedef union { unsigned all :8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned ili :1; /* Illegal Length Indication */ unsigned eom :1; /* End Of Media Detected */ unsigned abrt :1; /* Aborted command - As defined by ATA */ unsigned mcr :1; /* Media Change Requested - As defined by ATA */ unsigned sense_key :4; /* Sense key of the last failed packet command */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned sense_key :4; /* Sense key of the last failed packet command */ unsigned mcr :1; /* Media Change Requested - As defined by ATA */ unsigned abrt :1; /* Aborted command - As defined by ATA */ unsigned eom :1; /* End Of Media Detected */ unsigned ili :1; /* Illegal Length Indication */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_error_reg_t; /* * ATAPI Feature Register */ typedef union { unsigned all :8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned dma :1; /* Using DMA or PIO */ unsigned reserved321 :3; /* Reserved */ unsigned reserved654 :3; /* Reserved (Tag Type) */ unsigned reserved7 :1; /* Reserved */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved7 :1; /* Reserved */ unsigned reserved654 :3; /* Reserved (Tag Type) */ unsigned reserved321 :3; /* Reserved */ unsigned dma :1; /* Using DMA or PIO */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_feature_reg_t; /* * ATAPI Byte Count Register. */ typedef union { unsigned all :16; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned low :8; /* LSB */ unsigned high :8; /* MSB */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned high :8; /* MSB */ unsigned low :8; /* LSB */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_bcount_reg_t; /* * ATAPI Interrupt Reason Register. */ typedef union { unsigned all :8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned cod :1; /* Information transferred is command (1) or data (0) */ unsigned io :1; /* The device requests us to read (1) or write (0) */ unsigned reserved :6; /* Reserved */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved :6; /* Reserved */ unsigned io :1; /* The device requests us to read (1) or write (0) */ unsigned cod :1; /* Information transferred is command (1) or data (0) */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_ireason_reg_t; /* * ATAPI floppy Drive Select Register */ typedef union { unsigned all :8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned sam_lun :3; /* Logical unit number */ unsigned reserved3 :1; /* Reserved */ unsigned drv :1; /* The responding drive will be drive 0 (0) or drive 1 (1) */ unsigned one5 :1; /* Should be set to 1 */ unsigned reserved6 :1; /* Reserved */ unsigned one7 :1; /* Should be set to 1 */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned one7 :1; /* Should be set to 1 */ unsigned reserved6 :1; /* Reserved */ unsigned one5 :1; /* Should be set to 1 */ unsigned drv :1; /* The responding drive will be drive 0 (0) or drive 1 (1) */ unsigned reserved3 :1; /* Reserved */ unsigned sam_lun :3; /* Logical unit number */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_drivesel_reg_t; /* * ATAPI Device Control Register */ typedef union { unsigned all :8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned zero0 :1; /* Should be set to zero */ unsigned nien :1; /* Device interrupt is disabled (1) or enabled (0) */ unsigned srst :1; /* ATA software reset. ATAPI devices should use the new ATAPI srst. */ unsigned one3 :1; /* Should be set to 1 */ unsigned reserved4567 :4; /* Reserved */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved4567 :4; /* Reserved */ unsigned one3 :1; /* Should be set to 1 */ unsigned srst :1; /* ATA software reset. ATAPI devices should use the new ATAPI srst. */ unsigned nien :1; /* Device interrupt is disabled (1) or enabled (0) */ unsigned zero0 :1; /* Should be set to zero */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif } b; } idefloppy_control_reg_t; /* * The following is used to format the general configuration word of * the ATAPI IDENTIFY DEVICE command. */ struct idefloppy_id_gcw { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned packet_size :2; /* Packet Size */ unsigned reserved234 :3; /* Reserved */ unsigned drq_type :2; /* Command packet DRQ type */ unsigned removable :1; /* Removable media */ unsigned device_type :5; /* Device type */ unsigned reserved13 :1; /* Reserved */ unsigned protocol :2; /* Protocol type */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned protocol :2; /* Protocol type */ unsigned reserved13 :1; /* Reserved */ unsigned device_type :5; /* Device type */ unsigned removable :1; /* Removable media */ unsigned drq_type :2; /* Command packet DRQ type */ unsigned reserved234 :3; /* Reserved */ unsigned packet_size :2; /* Packet Size */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif }; /* * INQUIRY packet command - Data Format */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned device_type :5; /* Peripheral Device Type */ unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ unsigned reserved1_6t0 :7; /* Reserved */ unsigned rmb :1; /* Removable Medium Bit */ unsigned ansi_version :3; /* ANSI Version */ unsigned ecma_version :3; /* ECMA Version */ unsigned iso_version :2; /* ISO Version */ unsigned response_format :4; /* Response Data Format */ unsigned reserved3_45 :2; /* Reserved */ unsigned reserved3_6 :1; /* TrmIOP - Reserved */ unsigned reserved3_7 :1; /* AENC - Reserved */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ unsigned device_type :5; /* Peripheral Device Type */ unsigned rmb :1; /* Removable Medium Bit */ unsigned reserved1_6t0 :7; /* Reserved */ unsigned iso_version :2; /* ISO Version */ unsigned ecma_version :3; /* ECMA Version */ unsigned ansi_version :3; /* ANSI Version */ unsigned reserved3_7 :1; /* AENC - Reserved */ unsigned reserved3_6 :1; /* TrmIOP - Reserved */ unsigned reserved3_45 :2; /* Reserved */ unsigned response_format :4; /* Response Data Format */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 additional_length; /* Additional Length (total_length-4) */ u8 rsv5, rsv6, rsv7; /* Reserved */ u8 vendor_id[8]; /* Vendor Identification */ u8 product_id[16]; /* Product Identification */ u8 revision_level[4]; /* Revision Level */ u8 vendor_specific[20]; /* Vendor Specific - Optional */ u8 reserved56t95[40]; /* Reserved - Optional */ /* Additional information may be returned */ } idefloppy_inquiry_result_t; /* * REQUEST SENSE packet command result - Data Format. */ typedef struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned error_code :7; /* Current error (0x70) */ unsigned valid :1; /* The information field conforms to SFF-8070i */ u8 reserved1 :8; /* Reserved */ unsigned sense_key :4; /* Sense Key */ unsigned reserved2_4 :1; /* Reserved */ unsigned ili :1; /* Incorrect Length Indicator */ unsigned reserved2_67 :2; #elif defined(__BIG_ENDIAN_BITFIELD) unsigned valid :1; /* The information field conforms to SFF-8070i */ unsigned error_code :7; /* Current error (0x70) */ u8 reserved1 :8; /* Reserved */ unsigned reserved2_67 :2; unsigned ili :1; /* Incorrect Length Indicator */ unsigned reserved2_4 :1; /* Reserved */ unsigned sense_key :4; /* Sense Key */ #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u32 information __attribute__ ((packed)); u8 asl; /* Additional sense length (n-7) */ u32 command_specific; /* Additional command specific information */ u8 asc; /* Additional Sense Code */ u8 ascq; /* Additional Sense Code Qualifier */ u8 replaceable_unit_code; /* Field Replaceable Unit Code */ u8 reserved[3]; u8 pad[2]; /* Padding to 20 bytes */ } idefloppy_request_sense_result_t; /* * Pages of the SELECT SENSE / MODE SENSE packet commands. */ #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 /* * Mode Parameter Header for the MODE SENSE packet command */ typedef struct { u16 mode_data_length; /* Length of the following data transfer */ u8 medium_type; /* Medium Type */ #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned reserved3 :7; unsigned wp :1; /* Write protect */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned wp :1; /* Write protect */ unsigned reserved3 :7; #else #error "Bitfield endianness not defined! Check your byteorder.h" #endif u8 reserved[4]; } idefloppy_mode_parameter_header_t; #define IDEFLOPPY_MIN(a,b) ((a)<(b) ? (a):(b)) #define IDEFLOPPY_MAX(a,b) ((a)>(b) ? (a):(b)) /* * Too bad. The drive wants to send us data which we are not ready to accept. * Just throw it away. */ static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) { while (bcount--) IN_BYTE (IDE_DATA_REG); } #if IDEFLOPPY_DEBUG_BUGS static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) { while (bcount--) OUT_BYTE (0, IDE_DATA_REG); } #endif /* IDEFLOPPY_DEBUG_BUGS */ /* * idefloppy_end_request is used to finish servicing a request. * * For read/write requests, we will call ide_end_request to pass to the * next buffer. */ static void idefloppy_end_request (byte uptodate, ide_hwgroup_t *hwgroup) { ide_drive_t *drive = hwgroup->drive; idefloppy_floppy_t *floppy = drive->driver_data; struct request *rq = hwgroup->rq; int error; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "Reached idefloppy_end_request\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ switch (uptodate) { case 0: error = IDEFLOPPY_ERROR_GENERAL; break; case 1: error = 0; break; default: error = uptodate; } if (error) floppy->failed_pc = NULL; /* Why does this happen? */ if (!rq) return; if (!IDEFLOPPY_RQ_CMD (rq->cmd)) { ide_end_request (uptodate, hwgroup); return; } rq->errors = error; ide_end_drive_cmd (drive, 0, 0); } static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) { struct request *rq = pc->rq; struct buffer_head *bh = rq->bh; int count; while (bcount) { if (pc->b_count == bh->b_size) { rq->sector += rq->current_nr_sectors; rq->nr_sectors -= rq->current_nr_sectors; idefloppy_end_request (1, HWGROUP(drive)); if ((bh = rq->bh) != NULL) pc->b_count = 0; } if (bh == NULL) { printk (KERN_ERR "%s: bh == NULL in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); idefloppy_discard_data (drive, bcount); return; } count = IDEFLOPPY_MIN (bh->b_size - pc->b_count, bcount); atapi_input_bytes (drive, bh->b_data + pc->b_count, count); bcount -= count; pc->b_count += count; } } static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) { struct request *rq = pc->rq; struct buffer_head *bh = rq->bh; int count; while (bcount) { if (!pc->b_count) { rq->sector += rq->current_nr_sectors; rq->nr_sectors -= rq->current_nr_sectors; idefloppy_end_request (1, HWGROUP(drive)); if ((bh = rq->bh) != NULL) { pc->b_data = bh->b_data; pc->b_count = bh->b_size; } } if (bh == NULL) { printk (KERN_ERR "%s: bh == NULL in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); idefloppy_write_zeros (drive, bcount); return; } count = IDEFLOPPY_MIN (pc->b_count, bcount); atapi_output_bytes (drive, pc->b_data, count); bcount -= count; pc->b_data += count; pc->b_count -= count; } } #ifdef CONFIG_BLK_DEV_IDEDMA static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) { struct request *rq = pc->rq; struct buffer_head *bh = rq->bh; while ((bh = rq->bh) != NULL) idefloppy_end_request (1, HWGROUP(drive)); } #endif /* CONFIG_BLK_DEV_IDEDMA */ /* * idefloppy_queue_pc_head generates a new packet command request in front * of the request queue, before the current request, so that it will be * processed immediately, on the next pass through the driver. */ static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) { ide_init_drive_cmd (rq); rq->buffer = (char *) pc; rq->cmd = IDEFLOPPY_PC_RQ; (void) ide_do_drive_cmd (drive, rq, ide_preempt); } static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; if (floppy->pc_stack_index==IDEFLOPPY_PC_STACK) floppy->pc_stack_index=0; return (&floppy->pc_stack[floppy->pc_stack_index++]); } static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; if (floppy->rq_stack_index==IDEFLOPPY_PC_STACK) floppy->rq_stack_index=0; return (&floppy->rq_stack[floppy->rq_stack_index++]); } /* * idefloppy_analyze_error is called on each failed packet command retry * to analyze the request sense. */ static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) { idefloppy_floppy_t *floppy = drive->driver_data; floppy->sense_key = result->sense_key; floppy->asc = result->asc; floppy->ascq = result->ascq; #if IDEFLOPPY_DEBUG_LOG if (floppy->failed_pc) printk (KERN_INFO "ide-floppy: pc = %x, sense key = %x, asc = %x, ascq = %x\n",floppy->failed_pc->c[0],result->sense_key,result->asc,result->ascq); else printk (KERN_INFO "ide-floppy: sense key = %x, asc = %x, ascq = %x\n",result->sense_key,result->asc,result->ascq); #endif /* IDEFLOPPY_DEBUG_LOG */ } static void idefloppy_request_sense_callback (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: Reached idefloppy_request_sense_callback\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ if (!floppy->pc->error) { idefloppy_analyze_error (drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); idefloppy_end_request (1,HWGROUP (drive)); } else { printk (KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); idefloppy_end_request (0,HWGROUP (drive)); } } /* * General packet command callback function. */ static void idefloppy_pc_callback (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: Reached idefloppy_pc_callback\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ idefloppy_end_request (floppy->pc->error ? 0:1, HWGROUP(drive)); } /* * idefloppy_init_pc initializes a packet command. */ static void idefloppy_init_pc (idefloppy_pc_t *pc) { memset (pc->c, 0, 12); pc->retries = 0; pc->flags = 0; pc->request_transfer = 0; pc->buffer = pc->pc_buffer; pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; pc->b_data = NULL; pc->callback = &idefloppy_pc_callback; } static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) { idefloppy_init_pc (pc); pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; pc->c[4] = 255; pc->request_transfer = 18; pc->callback = &idefloppy_request_sense_callback; } /* * idefloppy_retry_pc is called when an error was detected during the * last packet command. We queue a request sense packet command in * the head of the request list. */ static void idefloppy_retry_pc (ide_drive_t *drive) { idefloppy_pc_t *pc; struct request *rq; idefloppy_error_reg_t error; error.all = IN_BYTE (IDE_ERROR_REG); pc = idefloppy_next_pc_storage (drive); rq = idefloppy_next_rq_storage (drive); idefloppy_create_request_sense_cmd (pc); idefloppy_queue_pc_head (drive, pc, rq); } /* * idefloppy_pc_intr is the usual interrupt handler which will be called * during a packet command. */ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_status_reg_t status; idefloppy_bcount_reg_t bcount; idefloppy_ireason_reg_t ireason; idefloppy_pc_t *pc=floppy->pc; struct request *rq = pc->rq; unsigned int temp; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: Reached idefloppy_pc_intr interrupt handler\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ #ifdef CONFIG_BLK_DEV_IDEDMA if (test_bit (PC_DMA_IN_PROGRESS, &pc->flags)) { if (HWIF(drive)->dmaproc(ide_dma_end, drive)) { set_bit (PC_DMA_ERROR, &pc->flags); } else { pc->actually_transferred=pc->request_transfer; idefloppy_update_buffers (drive, pc); } #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: DMA finished\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ } #endif /* CONFIG_BLK_DEV_IDEDMA */ status.all = GET_STAT(); /* Clear the interrupt */ if (!status.b.drq) { /* No more interrupts */ #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred); #endif /* IDEFLOPPY_DEBUG_LOG */ clear_bit (PC_DMA_IN_PROGRESS, &pc->flags); ide__sti(); /* local CPU only */ if (status.b.check /* || test_bit (PC_DMA_ERROR, &pc->flags)i */) { /* Error detected */ #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: %s: I/O error status.b.check\n",drive->name); #endif /* IDEFLOPPY_DEBUG_LOG */ rq->errors++; if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { printk (KERN_ERR "ide-floppy: I/O error in request sense command\n"); return ide_do_reset (drive); } idefloppy_retry_pc (drive); /* Retry operation */ return ide_stopped; /* queued, but not started */ } pc->error = 0; if (floppy->failed_pc == pc) floppy->failed_pc=NULL; pc->callback(drive); /* Command finished - Call the callback function */ return ide_stopped; } #ifdef CONFIG_BLK_DEV_IDEDMA if (test_and_clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) { printk (KERN_ERR "ide-floppy: The floppy wants to issue more interrupts in DMA mode\n"); (void) HWIF(drive)->dmaproc(ide_dma_off, drive); return ide_do_reset (drive); } #endif /* CONFIG_BLK_DEV_IDEDMA */ bcount.b.high=IN_BYTE (IDE_BCOUNTH_REG); /* Get the number of bytes to transfer */ bcount.b.low=IN_BYTE (IDE_BCOUNTL_REG); /* on this interrupt */ ireason.all=IN_BYTE (IDE_IREASON_REG); if (ireason.b.cod) { printk (KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); return ide_do_reset (drive); } if (ireason.b.io == test_bit (PC_WRITING, &pc->flags)) { /* Hopefully, we will never get here */ printk (KERN_ERR "ide-floppy: We wanted to %s, ", ireason.b.io ? "Write":"Read"); printk (KERN_ERR "but the floppy wants us to %s !\n",ireason.b.io ? "Read":"Write"); return ide_do_reset (drive); } if (!test_bit (PC_WRITING, &pc->flags)) { /* Reading - Check that we have enough space */ temp = pc->actually_transferred + bcount.all; if ( temp > pc->request_transfer) { if (temp > pc->buffer_size) { printk (KERN_ERR "ide-floppy: The floppy wants to send us more data than expected - discarding data\n"); idefloppy_discard_data (drive,bcount.all); ide_set_handler (drive,&idefloppy_pc_intr,IDEFLOPPY_WAIT_CMD); return ide_started; } #if IDEFLOPPY_DEBUG_LOG printk (KERN_NOTICE "ide-floppy: The floppy wants to send us more data than expected - allowing transfer\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ } } if (test_bit (PC_WRITING, &pc->flags)) { if (pc->buffer != NULL) atapi_output_bytes (drive,pc->current_position,bcount.all); /* Write the current buffer */ else idefloppy_output_buffers (drive, pc, bcount.all); } else { if (pc->buffer != NULL) atapi_input_bytes (drive,pc->current_position,bcount.all); /* Read the current buffer */ else idefloppy_input_buffers (drive, pc, bcount.all); } pc->actually_transferred+=bcount.all; /* Update the current position */ pc->current_position+=bcount.all; ide_set_handler (drive,&idefloppy_pc_intr,IDEFLOPPY_WAIT_CMD); /* And set the interrupt handler again */ return ide_started; } static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) { ide_startstop_t startstop; idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_ireason_reg_t ireason; if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) { printk (KERN_ERR "ide-floppy: Strange, packet command initiated yet DRQ isn't asserted\n"); return startstop; } ireason.all=IN_BYTE (IDE_IREASON_REG); if (!ireason.b.cod || ireason.b.io) { printk (KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while issuing a packet command\n"); return ide_do_reset (drive); } ide_set_handler (drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD); /* Set the interrupt routine */ atapi_output_bytes (drive, floppy->pc->c, 12); /* Send the actual packet */ return ide_started; } /* * Issue a packet command */ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_bcount_reg_t bcount; int dma_ok = 0; #if IDEFLOPPY_DEBUG_BUGS if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { printk (KERN_ERR "ide-floppy: possible ide-floppy.c bug - Two request sense in serial were issued\n"); } #endif /* IDEFLOPPY_DEBUG_BUGS */ if (floppy->failed_pc == NULL && pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) floppy->failed_pc=pc; floppy->pc=pc; /* Set the current packet command */ if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || test_bit (PC_ABORT, &pc->flags)) { /* * We will "abort" retrying a packet command in case * a legitimate error code was received. */ if (!test_bit (PC_ABORT, &pc->flags)) { printk (KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, asc = %2x, ascq = %2x\n", drive->name, pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq); pc->error = IDEFLOPPY_ERROR_GENERAL; /* Giving up */ } floppy->failed_pc=NULL; pc->callback(drive); return ide_stopped; } #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "Retry number - %d\n",pc->retries); #endif /* IDEFLOPPY_DEBUG_LOG */ pc->retries++; pc->actually_transferred=0; /* We haven't transferred any data yet */ pc->current_position=pc->buffer; bcount.all = IDE_MIN(pc->request_transfer, 63 * 1024); #ifdef CONFIG_BLK_DEV_IDEDMA if (test_and_clear_bit (PC_DMA_ERROR, &pc->flags)) { (void) HWIF(drive)->dmaproc(ide_dma_off, drive); } if (test_bit (PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) dma_ok=!HWIF(drive)->dmaproc(test_bit (PC_WRITING, &pc->flags) ? ide_dma_write : ide_dma_read, drive); #endif /* CONFIG_BLK_DEV_IDEDMA */ if (IDE_CONTROL_REG) OUT_BYTE (drive->ctl,IDE_CONTROL_REG); OUT_BYTE (dma_ok ? 1:0,IDE_FEATURE_REG); /* Use PIO/DMA */ OUT_BYTE (bcount.b.high,IDE_BCOUNTH_REG); OUT_BYTE (bcount.b.low,IDE_BCOUNTL_REG); OUT_BYTE (drive->select.all,IDE_SELECT_REG); #ifdef CONFIG_BLK_DEV_IDEDMA if (dma_ok) { /* Begin DMA, if necessary */ set_bit (PC_DMA_IN_PROGRESS, &pc->flags); (void) (HWIF(drive)->dmaproc(ide_dma_begin, drive)); } #endif /* CONFIG_BLK_DEV_IDEDMA */ if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { ide_set_handler (drive, &idefloppy_transfer_pc, IDEFLOPPY_WAIT_CMD); OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* Issue the packet command */ return ide_started; } else { OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); return idefloppy_transfer_pc (drive); } } static void idefloppy_rw_callback (ide_drive_t *drive) { #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ idefloppy_end_request(1, HWGROUP(drive)); return; } static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) { #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "ide-floppy: creating prevent removal command, prevent = %d\n", prevent); #endif /* IDEFLOPPY_DEBUG_LOG */ idefloppy_init_pc (pc); pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; pc->c[4] = prevent; } static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) { idefloppy_init_pc (pc); pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; pc->c[7] = 255; pc->c[8] = 255; pc->request_transfer = 255; } /* * A mode sense command is used to "sense" floppy parameters. */ static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, byte page_code, byte type) { unsigned short length = sizeof (idefloppy_mode_parameter_header_t); idefloppy_init_pc (pc); pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; pc->c[1] = 0; pc->c[2] = page_code + (type << 6); switch (page_code) { case IDEFLOPPY_CAPABILITIES_PAGE: length += 12; break; case IDEFLOPPY_FLEXIBLE_DISK_PAGE: length += 32; break; default: printk (KERN_ERR "ide-floppy: unsupported page code in create_mode_sense_cmd\n"); } put_unaligned (htons (length), (unsigned short *) &pc->c[7]); pc->request_transfer = length; } static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) { idefloppy_init_pc (pc); pc->c[0] = IDEFLOPPY_START_STOP_CMD; pc->c[4] = start; } static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) { idefloppy_init_pc(pc); pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; } static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) { int block = sector / floppy->bs_factor; int blocks = rq->nr_sectors / floppy->bs_factor; #if IDEFLOPPY_DEBUG_LOG printk ("create_rw1%d_cmd: block == %d, blocks == %d\n", 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), block, blocks); #endif /* IDEFLOPPY_DEBUG_LOG */ idefloppy_init_pc (pc); if (test_bit (IDEFLOPPY_USE_READ12, &floppy->flags)) { pc->c[0] = rq->cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; put_unaligned (htonl (blocks), (unsigned int *) &pc->c[6]); } else { pc->c[0] = rq->cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; put_unaligned (htons (blocks), (unsigned short *) &pc->c[7]); } put_unaligned (htonl (block), (unsigned int *) &pc->c[2]); pc->callback = &idefloppy_rw_callback; pc->rq = rq; pc->b_data = rq->buffer; pc->b_count = rq->cmd == READ ? 0 : rq->bh->b_size; if (rq->cmd == WRITE) set_bit (PC_WRITING, &pc->flags); pc->buffer = NULL; pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; set_bit (PC_DMA_RECOMMENDED, &pc->flags); } /* * idefloppy_do_request is our request handling function. */ static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t *pc; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "rq_status: %d, rq_dev: %u, cmd: %d, errors: %d\n",rq->rq_status,(unsigned int) rq->rq_dev,rq->cmd,rq->errors); printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %ld\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors); #endif /* IDEFLOPPY_DEBUG_LOG */ if (rq->errors >= ERROR_MAX) { if (floppy->failed_pc != NULL) printk (KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, asc = %2x, ascq = %2x\n", drive->name, floppy->failed_pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq); else printk (KERN_ERR "ide-floppy: %s: I/O error in idefloppy_do_request\n", drive->name); idefloppy_end_request (0, HWGROUP(drive)); return ide_stopped; } switch (rq->cmd) { case READ: case WRITE: if (rq->sector % floppy->bs_factor || rq->nr_sectors % floppy->bs_factor) { printk ("%s: unsupported r/w request size\n", drive->name); idefloppy_end_request (0, HWGROUP(drive)); return ide_stopped; } pc = idefloppy_next_pc_storage (drive); idefloppy_create_rw_cmd (floppy, pc, rq, block); break; case IDEFLOPPY_PC_RQ: pc = (idefloppy_pc_t *) rq->buffer; break; default: printk (KERN_ERR "ide-floppy: unsupported command %x in request queue\n", rq->cmd); idefloppy_end_request (0,HWGROUP (drive)); return ide_stopped; } pc->rq = rq; return idefloppy_issue_pc (drive, pc); } /* * idefloppy_queue_pc_tail adds a special packet command request to the * tail of the request queue, and waits for it to be serviced. */ static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) { struct request rq; ide_init_drive_cmd (&rq); rq.buffer = (char *) pc; rq.cmd = IDEFLOPPY_PC_RQ; return ide_do_drive_cmd (drive, &rq, ide_wait); } /* * Look at the flexible disk page parameters. We will ignore the CHS * capacity parameters and use the LBA parameters instead. */ static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; idefloppy_mode_parameter_header_t *header; idefloppy_flexible_disk_page_t *page; int capacity, lba_capacity; /* Inserted by Paul Bristow * The IOMEGA Clik! drive does not support this command * so I removed it and fake the important parameters. * This does not appear to have any major side effects, * so I hope everything is OK. */ if (!strstr(drive->id->model,"Clik")) { idefloppy_create_mode_sense_cmd (&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); if (idefloppy_queue_pc_tail (drive,&pc)) { printk (KERN_ERR "ide-floppy: Can't get flexible disk page parameters\n"); return 1; } header = (idefloppy_mode_parameter_header_t *) pc.buffer; floppy->wp = header->wp; page = (idefloppy_flexible_disk_page_t *) (header + 1); page->transfer_rate = ntohs (page->transfer_rate); page->sector_size = ntohs (page->sector_size); page->cyls = ntohs (page->cyls); page->rpm = ntohs (page->rpm); capacity = page->cyls * page->heads * page->sectors * page->sector_size; if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) printk (KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, %d sector size, %d rpm\n", drive->name, capacity / 1024, page->cyls, page->heads, page->sectors, page->transfer_rate / 8, page->sector_size, page->rpm); floppy->flexible_disk_page = *page; drive->bios_cyl = page->cyls; drive->bios_head = page->heads; drive->bios_sect = page->sectors; lba_capacity = floppy->blocks * floppy->block_size; if (capacity != lba_capacity) { printk (KERN_NOTICE "%s: The drive reports both %d and %d bytes as its capacity\n", drive->name, capacity, lba_capacity); capacity = IDEFLOPPY_MIN(capacity, lba_capacity); floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; } } else { /* It is an IOMEGA Clik! Drive, which does not support the above command */ printk (KERN_INFO "Forcing Clik! Parameters\n"); floppy->blocks=78882; floppy->block_size=512; floppy->bs_factor=1; } return 0; } /* * Determine if a media is present in the floppy drive, and if so, * its LBA capacity. */ static int idefloppy_get_capacity (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; idefloppy_capacity_header_t *header; idefloppy_capacity_descriptor_t *descriptor; int i, descriptors, rc = 1, blocks, length; drive->bios_cyl = 0; drive->bios_head = drive->bios_sect = 0; floppy->blocks = floppy->bs_factor = 0; drive->part[0].nr_sects = 0; idefloppy_create_read_capacity_cmd (&pc); if (idefloppy_queue_pc_tail (drive, &pc)) { printk (KERN_ERR "ide-floppy: Can't get floppy parameters\n"); return 1; } header = (idefloppy_capacity_header_t *) pc.buffer; descriptors = header->length / sizeof (idefloppy_capacity_descriptor_t); descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); for (i = 0; i < descriptors; i++, descriptor++) { blocks = descriptor->blocks = ntohl (descriptor->blocks); length = descriptor->length = ntohs (descriptor->length); if (!i && descriptor->dc == CAPACITY_CURRENT) { if (memcmp (descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) printk (KERN_INFO "%s: %dkB, %d blocks, %d sector size\n", drive->name, blocks * length / 1024, blocks, length); floppy->capacity = *descriptor; if (!length || length % 512) printk (KERN_ERR "%s: %d bytes block size not supported\n", drive->name, length); else { floppy->blocks = blocks; floppy->block_size = length; if ((floppy->bs_factor = length / 512) != 1) printk (KERN_NOTICE "%s: warning: non 512 bytes block size not fully supported\n", drive->name); rc = 0; } } #if IDEFLOPPY_DEBUG_INFO if (!i) printk (KERN_INFO "Descriptor 0 Code: %d\n", descriptor->dc); printk (KERN_INFO "Descriptor %d: %dkB, %d blocks, %d sector size\n", i, blocks * length / 1024, blocks, length); #endif /* IDEFLOPPY_DEBUG_INFO */ } (void) idefloppy_get_flexible_disk_page (drive); drive->part[0].nr_sects = floppy->blocks * floppy->bs_factor; return /* rc */ 0; } /* * Our special ide-floppy ioctl's. * * Currently there aren't any ioctl's. */ static int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { idefloppy_pc_t pc; if (cmd == CDROMEJECT) { if (drive->usage > 1) return -EBUSY; /* The IOMEGA CLik! Drive doesn't support this command */ if (!strstr(drive->id->model,"Clik")) { idefloppy_create_prevent_cmd (&pc, 0); (void) idefloppy_queue_pc_tail (drive, &pc); } idefloppy_create_start_stop_cmd (&pc, 2); (void) idefloppy_queue_pc_tail (drive, &pc); return 0; } return -EIO; } /* * Our open/release functions */ static int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "Reached idefloppy_open\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ MOD_INC_USE_COUNT; if (drive->usage == 1) { printk (KERN_INFO "Testing if unit is ready...\n"); idefloppy_create_test_unit_ready_cmd(&pc); if (idefloppy_queue_pc_tail(drive, &pc)) { printk (KERN_INFO "Not ready, issuing start command\n"); idefloppy_create_start_stop_cmd (&pc, 1); (void) idefloppy_queue_pc_tail (drive, &pc); } else { printk (KERN_INFO "Yes unit is ready\n"); } if (idefloppy_get_capacity (drive)) { drive->usage--; MOD_DEC_USE_COUNT; printk (KERN_INFO "I/O Error Getting Capacity\n"); return -EIO; } if (floppy->wp && (filp->f_mode & 2)) { drive->usage--; MOD_DEC_USE_COUNT; return -EROFS; } set_bit (IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); /* IOMEGA Clik! drives do not support lock/unlock commands */ if (!strstr(drive->id->model,"Clik")) { idefloppy_create_prevent_cmd (&pc, 1); (void) idefloppy_queue_pc_tail (drive, &pc); } check_disk_change(inode->i_rdev); } return 0; } static void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive) { idefloppy_pc_t pc; #if IDEFLOPPY_DEBUG_LOG printk (KERN_INFO "Reached idefloppy_release\n"); #endif /* IDEFLOPPY_DEBUG_LOG */ if (!drive->usage) { invalidate_buffers (inode->i_rdev); /* IOMEGA Clik! drives do not support lock/unlock commands */ if (!strstr(drive->id->model,"Clik")) { idefloppy_create_prevent_cmd (&pc, 0); (void) idefloppy_queue_pc_tail (drive, &pc); } } MOD_DEC_USE_COUNT; } /* * Check media change. Use a simple algorithm for now. */ static int idefloppy_media_change (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; return test_and_clear_bit (IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); } /* * Return the current floppy capacity to ide.c. */ static unsigned long idefloppy_capacity (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; unsigned long capacity = floppy->blocks * floppy->bs_factor; return capacity; } /* * idefloppy_identify_device checks if we can support a drive, * based on the ATAPI IDENTIFY command results. */ static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) { struct idefloppy_id_gcw gcw; #if IDEFLOPPY_DEBUG_INFO unsigned short mask,i; char buffer[80]; #endif /* IDEFLOPPY_DEBUG_INFO */ *((unsigned short *) &gcw) = id->config; #if IDEFLOPPY_DEBUG_INFO printk (KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); switch (gcw.protocol) { case 0: case 1: sprintf (buffer, "ATA");break; case 2: sprintf (buffer, "ATAPI");break; case 3: sprintf (buffer, "Reserved (Unknown to ide-floppy)");break; } printk (KERN_INFO "Protocol Type: %s\n", buffer); switch (gcw.device_type) { case 0: sprintf (buffer, "Direct-access Device");break; case 1: sprintf (buffer, "Streaming Tape Device");break; case 2: case 3: case 4: sprintf (buffer, "Reserved");break; case 5: sprintf (buffer, "CD-ROM Device");break; case 6: sprintf (buffer, "Reserved"); case 7: sprintf (buffer, "Optical memory Device");break; case 0x1f: sprintf (buffer, "Unknown or no Device type");break; default: sprintf (buffer, "Reserved"); } printk (KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); printk (KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); switch (gcw.drq_type) { case 0: sprintf (buffer, "Microprocessor DRQ");break; case 1: sprintf (buffer, "Interrupt DRQ");break; case 2: sprintf (buffer, "Accelerated DRQ");break; case 3: sprintf (buffer, "Reserved");break; } printk (KERN_INFO "Command Packet DRQ Type: %s\n", buffer); switch (gcw.packet_size) { case 0: sprintf (buffer, "12 bytes");break; case 1: sprintf (buffer, "16 bytes");break; default: sprintf (buffer, "Reserved");break; } printk (KERN_INFO "Command Packet Size: %s\n", buffer); printk (KERN_INFO "Model: %.40s\n",id->model); printk (KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev); printk (KERN_INFO "Serial Number: %.20s\n",id->serial_no); printk (KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512); printk (KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n"); printk (KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n"); printk (KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n"); printk (KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n"); printk (KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n"); printk (KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO); printk (KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA); printk (KERN_INFO "Single Word DMA supported modes:\n"); for (i=0,mask=1;i<8;i++,mask=mask << 1) { if (id->dma_1word & mask) printk (KERN_INFO " Mode %d%s\n", i, (id->dma_1word & (mask << 8)) ? " (active)" : ""); } printk (KERN_INFO "Multi Word DMA supported modes:\n"); for (i=0,mask=1;i<8;i++,mask=mask << 1) { if (id->dma_mword & mask) printk (KERN_INFO " Mode %d%s\n", i, (id->dma_mword & (mask << 8)) ? " (active)" : ""); } if (id->field_valid & 0x0002) { printk (KERN_INFO "Enhanced PIO Modes: %s\n",id->eide_pio_modes & 1 ? "Mode 3":"None"); if (id->eide_dma_min == 0) sprintf (buffer, "Not supported"); else sprintf (buffer, "%d ns",id->eide_dma_min); printk (KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer); if (id->eide_dma_time == 0) sprintf (buffer, "Not supported"); else sprintf (buffer, "%d ns",id->eide_dma_time); printk (KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer); if (id->eide_pio == 0) sprintf (buffer, "Not supported"); else sprintf (buffer, "%d ns",id->eide_pio); printk (KERN_INFO "Minimum PIO cycle without IORDY: %s\n", buffer); if (id->eide_pio_iordy == 0) sprintf (buffer, "Not supported"); else sprintf (buffer, "%d ns",id->eide_pio_iordy); printk (KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer); } else printk (KERN_INFO "According to the device, fields 64-70 are not valid.\n"); #endif /* IDEFLOPPY_DEBUG_INFO */ if (gcw.protocol != 2) printk (KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); else if (gcw.device_type != 0) printk (KERN_ERR "ide-floppy: Device type is not set to floppy\n"); else if (!gcw.removable) printk (KERN_ERR "ide-floppy: The removable flag is not set\n"); else if (gcw.drq_type == 3) { printk (KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); } else if (gcw.packet_size != 0) { printk (KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); } else return 1; return 0; } static void idefloppy_add_settings(ide_drive_t *drive) { int major = HWIF(drive)->major; int minor = drive->select.b.unit << PARTN_BITS; ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); ide_add_setting(drive, "breada_readahead", SETTING_RW, BLKRAGET, BLKRASET, TYPE_INT, 0, 255, 1, 2, &read_ahead[major], NULL); ide_add_setting(drive, "file_readahead", SETTING_RW, BLKFRAGET, BLKFRASET, TYPE_INTA, 0, INT_MAX, 1, 1024, &max_readahead[major][minor], NULL); ide_add_setting(drive, "max_kb_per_request", SETTING_RW, BLKSECTGET, BLKSECTSET, TYPE_INTA, 1, 255, 1, 2, &max_sectors[major][minor], NULL); } /* * Driver initialization. */ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) { struct idefloppy_id_gcw gcw; int major = HWIF(drive)->major, i; int minor = drive->select.b.unit << PARTN_BITS; *((unsigned short *) &gcw) = drive->id->config; drive->driver_data = floppy; drive->ready_stat = 0; memset (floppy, 0, sizeof (idefloppy_floppy_t)); floppy->drive = drive; floppy->pc = floppy->pc_stack; if (gcw.drq_type == 1) set_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); /* * We used to check revisions here. At this point however * I'm giving up. Just assume they are all broken, its easier. * * The actual reason for the workarounds was likely * a driver bug after all rather than a firmware bug, * and the workaround below used to hide it. It should * be fixed as of version 1.9, but to be on the safe side * we'll leave the limitation below for the 2.2.x tree. */ if (strcmp(drive->id->model, "IOMEGA ZIP 100 ATAPI") == 0) { for (i = 0; i < 1 << PARTN_BITS; i++) max_sectors[major][minor + i] = 64; } /* * 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 (strcmp(drive->id->model, "IOMEGA Clik! 40 CZ ATAPI") == 0) { for (i = 0; i < 1 << PARTN_BITS; i++) max_sectors[major][minor + i] = 64; } (void) idefloppy_get_capacity (drive); idefloppy_add_settings(drive); } static int idefloppy_cleanup (ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; if (ide_unregister_subdriver (drive)) return 1; drive->driver_data = NULL; kfree (floppy); return 0; } #ifdef CONFIG_PROC_FS static ide_proc_entry_t idefloppy_proc[] = { { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, { NULL, 0, NULL, NULL } }; #else #define idefloppy_proc NULL #endif /* CONFIG_PROC_FS */ /* * IDE subdriver functions, registered with ide.c */ static ide_driver_t idefloppy_driver = { "ide-floppy", /* name */ IDEFLOPPY_VERSION, /* version */ ide_floppy, /* media */ 0, /* busy */ 1, /* supports_dma */ 0, /* supports_dsc_overlap */ idefloppy_cleanup, /* cleanup */ idefloppy_do_request, /* do_request */ idefloppy_end_request, /* end_request */ idefloppy_ioctl, /* ioctl */ idefloppy_open, /* open */ idefloppy_release, /* release */ idefloppy_media_change, /* media_change */ NULL, /* pre_reset */ idefloppy_capacity, /* capacity */ NULL, /* special */ idefloppy_proc /* proc */ }; int idefloppy_init (void); static ide_module_t idefloppy_module = { IDE_DRIVER_MODULE, idefloppy_init, &idefloppy_driver, NULL }; /* * idefloppy_init will register the driver for each floppy. */ int idefloppy_init (void) { ide_drive_t *drive; idefloppy_floppy_t *floppy; int failed = 0; MOD_INC_USE_COUNT; while ((drive = ide_scan_devices (ide_floppy, idefloppy_driver.name, NULL, failed++)) != NULL) { if (!idefloppy_identify_device (drive, drive->id)) { printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); continue; } if ((floppy = (idefloppy_floppy_t *) kmalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); continue; } if (ide_register_subdriver (drive, &idefloppy_driver, IDE_SUBDRIVER_VERSION)) { printk (KERN_ERR "ide-floppy: %s: Failed to register the driver with ide.c\n", drive->name); kfree (floppy); continue; } idefloppy_setup (drive, floppy); failed--; } ide_register_module(&idefloppy_module); MOD_DEC_USE_COUNT; return 0; } #ifdef MODULE int init_module (void) { return idefloppy_init (); } void cleanup_module (void) { ide_drive_t *drive; int failed = 0; while ((drive = ide_scan_devices (ide_floppy, idefloppy_driver.name, &idefloppy_driver, failed)) != NULL) { if (idefloppy_cleanup (drive)) { printk ("%s: cleanup_module() called while still busy\n", drive->name); failed++; } /* We must remove proc entries defined in this module. Otherwise we oops while accessing these entries */ if (drive->proc) ide_remove_proc_entries(drive->proc, idefloppy_proc); } ide_unregister_module(&idefloppy_module); } #endif /* MODULE */