/* * IDE ATAPI floppy driver. * * Copyright (C) 1996-1999 Gadi Oxman * Copyright (C) 2000-2002 Paul Bristow * Copyright (C) 2005 Bartlomiej Zolnierkiewicz */ /* * 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 * * For a historical changelog see * Documentation/ide/ChangeLog.ide-floppy.1996-2002 */ #define IDEFLOPPY_VERSION "0.99.newide" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ #define IDEFLOPPY_DEBUG( fmt, args... ) #if IDEFLOPPY_DEBUG_LOG #define debug_log(fmt, args...) \ printk(KERN_INFO "ide-floppy: " fmt, ## args) #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 */ /* format capacities descriptor codes */ #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; unsigned int openers; /* protected by BKL for now */ /* 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 descriptor */ u8 cap_desc[8]; /* Copy of the flexible disk page */ u8 flexible_disk_page[32]; /* Write protect */ int wp; /* Supports format progress report */ int srfp; /* Status/Action flags */ unsigned long flags; } idefloppy_floppy_t; #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ /* * Floppy flag bits values. */ #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ /* * 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 /* * 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 }; /* * Pages of the SELECT SENSE / MODE SENSE packet commands. * See SFF-8070i spec. */ #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 static DEFINE_MUTEX(idefloppy_ref_mutex); #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; mutex_lock(&idefloppy_ref_mutex); floppy = ide_floppy_g(disk); if (floppy) kref_get(&floppy->kref); mutex_unlock(&idefloppy_ref_mutex); return floppy; } static void idefloppy_cleanup_obj(struct kref *); static void ide_floppy_put(struct ide_floppy_obj *floppy) { mutex_lock(&idefloppy_ref_mutex); kref_put(&floppy->kref, idefloppy_cleanup_obj); mutex_unlock(&idefloppy_ref_mutex); } /* * 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("Reached %s\n", __func__); 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 (!blk_special_request(rq)) { /* 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 req_iterator iter; unsigned long flags; char *data; int count, done = 0; rq_for_each_segment(bvec, rq, iter) { 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 req_iterator iter; struct bio_vec *bvec; unsigned long flags; int count, done = 0; char *data; rq_for_each_segment(bvec, rq, iter) { if (!bcount) break; count = min(bvec->bv_len, bcount); data = bvec_kmap_irq(bvec, &flags); drive->hwif->atapi_output_bytes(drive, data, count); bvec_kunmap_irq(data, &flags); bcount -= count; pc->b_count += count; done += count; } idefloppy_do_end_request(drive, 1, done >> 9); #if IDEFLOPPY_DEBUG_BUGS if (bcount) { printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); idefloppy_write_zeros(drive, bcount); } #endif } static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) { struct request *rq = pc->rq; struct bio *bio = rq->bio; while ((bio = rq->bio) != NULL) idefloppy_do_end_request(drive, 1, 0); } /* * idefloppy_queue_pc_head generates a new packet command request in front * of the request queue, before the current request, so that it will be * processed immediately, on the next pass through the driver. */ static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) { struct ide_floppy_obj *floppy = drive->driver_data; ide_init_drive_cmd(rq); rq->buffer = (char *) pc; rq->cmd_type = REQ_TYPE_SPECIAL; 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++]); } static void idefloppy_request_sense_callback(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; u8 *buf = floppy->pc->buffer; debug_log("Reached %s\n", __func__); if (!floppy->pc->error) { floppy->sense_key = buf[2] & 0x0F; floppy->asc = buf[12]; floppy->ascq = buf[13]; floppy->progress_indication = buf[15] & 0x80 ? (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; if (floppy->failed_pc) debug_log("pc = %x, sense key = %x, asc = %x," " ascq = %x\n", floppy->failed_pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq); else debug_log("sense key = %x, asc = %x, ascq = %x\n", floppy->sense_key, floppy->asc, floppy->ascq); 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("Reached %s\n", __func__); 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] = GPCMD_REQUEST_SENSE; 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; (void)drive->hwif->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; ide_hwif_t *hwif = drive->hwif; idefloppy_pc_t *pc = floppy->pc; struct request *rq = pc->rq; unsigned int temp; u16 bcount; u8 stat, ireason; debug_log("Reached %s interrupt handler\n", __func__); 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("DMA finished\n"); } /* Clear the interrupt */ stat = drive->hwif->INB(IDE_STATUS_REG); if ((stat & DRQ_STAT) == 0) { /* No more interrupts */ debug_log("Packet command completed, %d bytes transferred\n", pc->actually_transferred); clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); local_irq_enable_in_hardirq(); if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) { /* Error detected */ debug_log("%s: I/O error\n", drive->name); rq->errors++; if (pc->c[0] == GPCMD_REQUEST_SENSE) { 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"); ide_dma_off(drive); return ide_do_reset(drive); } /* Get the number of bytes to transfer */ bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) | hwif->INB(IDE_BCOUNTL_REG); /* on this interrupt */ ireason = hwif->INB(IDE_IREASON_REG); if (ireason & CD) { printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); return ide_do_reset(drive); } if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) { /* Hopefully, we will never get here */ printk(KERN_ERR "ide-floppy: We wanted to %s, ", (ireason & IO) ? "Write" : "Read"); printk(KERN_ERR "but the floppy wants us to %s !\n", (ireason & 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; 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); ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); return ide_started; } debug_log("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->atapi_output_bytes(drive, pc->current_position, bcount); else idefloppy_output_buffers(drive, pc, bcount); } else { if (pc->buffer != NULL) /* Read the current buffer */ hwif->atapi_input_bytes(drive, pc->current_position, bcount); else idefloppy_input_buffers(drive, pc, bcount); } /* Update the current position */ pc->actually_transferred += bcount; pc->current_position += bcount; 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; u8 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 = drive->hwif->INB(IDE_IREASON_REG); if ((ireason & CD) == 0 || (ireason & IO)) { printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " "issuing a packet command\n"); return ide_do_reset(drive); } /* 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; u8 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 = drive->hwif->INB(IDE_IREASON_REG); if ((ireason & CD) == 0 || (ireason & 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. */ 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; ide_handler_t *pkt_xfer_routine; u16 bcount; u8 dma; if (floppy->failed_pc == NULL && pc->c[0] != GPCMD_REQUEST_SENSE) 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("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 = min(pc->request_transfer, 63 * 1024); if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) ide_dma_off(drive); dma = 0; if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) dma = !hwif->dma_setup(drive); ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | IDE_TFLAG_OUT_DEVICE, bcount, dma); if (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("Reached %s\n", __func__); idefloppy_do_end_request(drive, 1, 0); return; } static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) { debug_log("creating prevent removal command, prevent = %d\n", prevent); idefloppy_init_pc(pc); pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; pc->c[4] = prevent; } static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) { idefloppy_init_pc(pc); pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 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] = GPCMD_FORMAT_UNIT; 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(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4])); put_unaligned(cpu_to_be32(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 = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ idefloppy_init_pc(pc); pc->c[0] = GPCMD_MODE_SENSE_10; 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(cpu_to_be16(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] = GPCMD_START_STOP_UNIT; pc->c[4] = start; } static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) { idefloppy_init_pc(pc); pc->c[0] = GPCMD_TEST_UNIT_READY; } 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 ? GPCMD_READ_12 : GPCMD_WRITE_12; put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]); } else { pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); } put_unaligned(cpu_to_be32(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->cmd_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 void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) { idefloppy_init_pc(pc); pc->callback = &idefloppy_rw_callback; memcpy(pc->c, rq->cmd, sizeof(pc->c)); pc->rq = rq; pc->b_count = rq->data_len; if (rq->data_len && rq_data_dir(rq) == WRITE) set_bit(PC_WRITING, &pc->flags); pc->buffer = rq->data; if (rq->bio) set_bit(PC_DMA_RECOMMENDED, &pc->flags); /* * possibly problematic, doesn't look like ide-floppy correctly * handled scattered requests if dma fails... */ pc->request_transfer = pc->buffer_size = rq->data_len; } /* * 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("dev: %s, cmd_type: %x, errors: %d\n", rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->cmd_type, rq->errors); debug_log("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 (blk_fs_request(rq)) { 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 (blk_special_request(rq)) { pc = (idefloppy_pc_t *) rq->buffer; } else if (blk_pc_request(rq)) { pc = idefloppy_next_pc_storage(drive); idefloppy_blockpc_cmd(floppy, pc, rq); } 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.cmd_type = REQ_TYPE_SPECIAL; rq.rq_disk = floppy->disk; return ide_do_drive_cmd(drive, &rq, ide_wait); } /* * Look at the flexible disk page parameters. We ignore the CHS capacity * parameters and use the LBA parameters instead. */ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; u8 *page; int capacity, lba_capacity; u16 transfer_rate, sector_size, cyls, rpm; u8 heads, sectors; 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; } floppy->wp = !!(pc.buffer[3] & 0x80); set_disk_ro(floppy->disk, floppy->wp); page = &pc.buffer[8]; transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]); sector_size = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]); cyls = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]); rpm = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]); heads = pc.buffer[8 + 4]; sectors = pc.buffer[8 + 5]; capacity = cyls * heads * sectors * sector_size; if (memcmp(page, &floppy->flexible_disk_page, 32)) printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " "%d sector size, %d rpm\n", drive->name, capacity / 1024, cyls, heads, sectors, transfer_rate / 8, sector_size, rpm); memcpy(&floppy->flexible_disk_page, page, 32); drive->bios_cyl = cyls; drive->bios_head = heads; drive->bios_sect = 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_sfrp_bit(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; 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; floppy->srfp = pc.buffer[8 + 2] & 0x40; return (0); } /* * Determine if a media is present in the floppy drive, and if so, its LBA * capacity. */ static int ide_floppy_get_capacity(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; idefloppy_pc_t pc; u8 *cap_desc; u8 header_len, desc_cnt; int i, rc = 1, blocks, length; drive->bios_cyl = 0; drive->bios_head = drive->bios_sect = 0; floppy->blocks = 0; floppy->bs_factor = 1; 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_len = pc.buffer[3]; cap_desc = &pc.buffer[4]; desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ for (i = 0; i < desc_cnt; i++) { unsigned int desc_start = 4 + i*8; blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]); length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]); debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", i, blocks * length / 1024, blocks, length); if (i) continue; /* * the code below is valid only for the 1st descriptor, ie i=0 */ switch (pc.buffer[desc_start + 4] & 0x03) { /* 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(cap_desc, &floppy->cap_desc, 8)) printk(KERN_INFO "%s: %dkB, %d blocks, %d " "sector size\n", drive->name, blocks * length / 1024, blocks, length); memcpy(&floppy->cap_desc, cap_desc, 8); 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; floppy->bs_factor = length / 512; if (floppy->bs_factor != 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; } debug_log("Descriptor 0 Code: %d\n", pc.buffer[desc_start + 4] & 0x03); } /* Clik! disk does not support get_flexible_disk_page */ if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) (void) ide_floppy_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 ide_floppy_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 ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) { idefloppy_pc_t pc; u8 header_len, desc_cnt; int i, blocks, length, u_array_size, 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_len = pc.buffer[3]; desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 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 = 1; i < desc_cnt; i++) { unsigned int desc_start = 4 + i*8; if (u_index >= u_array_size) break; /* User-supplied buffer too small */ blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]); length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]); 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); } /* ** Get ATAPI_FORMAT_UNIT progress indication. ** ** Userland gives a pointer to an int. The int is set to a progress ** 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 { unsigned long flags; u8 stat; local_irq_save(flags); stat = drive->hwif->INB(IDE_STATUS_REG); local_irq_restore(flags); progress_indication = ((stat & SEEK_STAT) == 0) ? 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 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); #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; } #ifdef CONFIG_IDE_PROC_FS static void idefloppy_add_settings(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; /* * drive setting name read/write data type min max mul_factor div_factor data pointer set function */ ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); } #else static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } #endif /* * 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) ide_floppy_get_capacity(drive); idefloppy_add_settings(drive); } static void ide_floppy_remove(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; struct gendisk *g = floppy->disk; ide_proc_unregister_driver(drive, floppy->driver); del_gendisk(g); ide_floppy_put(floppy); } static void idefloppy_cleanup_obj(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_IDE_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 } }; #endif /* CONFIG_IDE_PROC_FS */ static int ide_floppy_probe(ide_drive_t *); static ide_driver_t idefloppy_driver = { .gen_driver = { .owner = THIS_MODULE, .name = "ide-floppy", .bus = &ide_bus_type, }, .probe = ide_floppy_probe, .remove = ide_floppy_remove, .version = IDEFLOPPY_VERSION, .media = ide_floppy, .supports_dsc_overlap = 0, .do_request = idefloppy_do_request, .end_request = idefloppy_do_end_request, .error = __ide_error, .abort = __ide_abort, #ifdef CONFIG_IDE_PROC_FS .proc = idefloppy_proc, #endif }; 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("Reached %s\n", __func__); if (!(floppy = ide_floppy_get(disk))) return -ENXIO; drive = floppy->drive; floppy->openers++; if (floppy->openers == 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 (ide_floppy_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 */ ) { ret = -EIO; goto out_put_floppy; } if (floppy->wp && (filp->f_mode & 2)) { 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)) { ret = -EBUSY; goto out_put_floppy; } return 0; out_put_floppy: floppy->openers--; 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("Reached %s\n", __func__); if (floppy->openers == 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); } floppy->openers--; ide_floppy_put(floppy); return 0; } static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) { struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); ide_drive_t *drive = floppy->drive; geo->heads = drive->bios_head; geo->sectors = drive->bios_sect; geo->cylinders = (u16)drive->bios_cyl; /* truncate */ return 0; } static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, unsigned long arg, unsigned int cmd) { if (floppy->openers > 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)) { int prevent = arg ? 1 : 0; if (cmd == CDROMEJECT) prevent = 0; idefloppy_create_prevent_cmd(pc, prevent); (void) idefloppy_queue_pc_tail(floppy->drive, pc); } if (cmd == CDROMEJECT) { idefloppy_create_start_stop_cmd(pc, 2); (void) idefloppy_queue_pc_tail(floppy->drive, pc); } return 0; } static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, int __user *arg) { int blocks, length, flags, err = 0; idefloppy_pc_t pc; if (floppy->openers > 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); /* * 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. */ if (get_user(blocks, arg) || get_user(length, arg+1) || get_user(flags, arg+2)) { err = -EFAULT; goto out; } (void) idefloppy_get_sfrp_bit(floppy->drive); idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); if (idefloppy_queue_pc_tail(floppy->drive, &pc)) err = -EIO; out: if (err) clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); return err; } 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; idefloppy_pc_t pc; void __user *argp = (void __user *)arg; int err; switch (cmd) { case CDROMEJECT: /* fall through */ case CDROM_LOCKDOOR: return ide_floppy_lockdoor(floppy, &pc, arg, cmd); case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: return 0; case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: return ide_floppy_get_format_capacities(drive, argp); case IDEFLOPPY_IOCTL_FORMAT_START: if (!(file->f_mode & 2)) return -EPERM; return ide_floppy_format_unit(floppy, (int __user *)arg); case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: return idefloppy_get_format_progress(drive, argp); } /* * skip SCSI_IOCTL_SEND_COMMAND (deprecated) * and CDROM_SEND_PACKET (legacy) ioctls */ if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, bdev->bd_disk, cmd, argp); else err = -ENOTTY; if (err == -ENOTTY) err = generic_ide_ioctl(drive, file, bdev, cmd, arg); return err; } 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, .getgeo = idefloppy_getgeo, .media_changed = idefloppy_media_changed, .revalidate_disk= idefloppy_revalidate_disk }; static int ide_floppy_probe(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 = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); goto failed; } g = alloc_disk(1 << PARTN_BITS); if (!g) goto out_free_floppy; ide_init_disk(g, drive); ide_proc_register_driver(drive, &idefloppy_driver); kref_init(&floppy->kref); floppy->drive = drive; floppy->driver = &idefloppy_driver; floppy->disk = g; g->private_data = &floppy->driver; drive->driver_data = floppy; idefloppy_setup (drive, floppy); g->minors = 1 << PARTN_BITS; g->driverfs_dev = &drive->gendev; g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; g->fops = &idefloppy_ops; drive->attach = 1; add_disk(g); return 0; out_free_floppy: kfree(floppy); failed: return -ENODEV; } MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); static void __exit idefloppy_exit (void) { driver_unregister(&idefloppy_driver.gen_driver); } static int __init idefloppy_init(void) { printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); return driver_register(&idefloppy_driver.gen_driver); } MODULE_ALIAS("ide:*m-floppy*"); module_init(idefloppy_init); module_exit(idefloppy_exit); MODULE_LICENSE("GPL");