| /* |
| * IDE ATAPI floppy driver. |
| * |
| * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il> |
| * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net> |
| * Copyright (C) 2005 Bartlomiej Zolnierkiewicz |
| * |
| * 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 "1.00" |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/timer.h> |
| #include <linux/mm.h> |
| #include <linux/interrupt.h> |
| #include <linux/major.h> |
| #include <linux/errno.h> |
| #include <linux/genhd.h> |
| #include <linux/slab.h> |
| #include <linux/cdrom.h> |
| #include <linux/ide.h> |
| #include <linux/bitops.h> |
| #include <linux/mutex.h> |
| |
| #include <scsi/scsi_ioctl.h> |
| |
| #include <asm/byteorder.h> |
| #include <linux/irq.h> |
| #include <linux/uaccess.h> |
| #include <linux/io.h> |
| #include <asm/unaligned.h> |
| |
| /* define to see debug info */ |
| #define IDEFLOPPY_DEBUG_LOG 0 |
| |
| /* #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) |
| |
| /* 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 */ |
| struct ide_atapi_pc *pc; |
| /* Last failed packet command */ |
| struct ide_atapi_pc *failed_pc; |
| /* Packet command stack */ |
| struct ide_atapi_pc 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. */ |
| enum { |
| /* DRQ interrupt device */ |
| IDEFLOPPY_FLAG_DRQ_INTERRUPT = (1 << 0), |
| /* Media may have changed */ |
| IDEFLOPPY_FLAG_MEDIA_CHANGED = (1 << 1), |
| /* Format in progress */ |
| IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS = (1 << 2), |
| /* Avoid commands not supported in Clik drive */ |
| IDEFLOPPY_FLAG_CLIK_DRIVE = (1 << 3), |
| /* Requires BH algorithm for packets */ |
| IDEFLOPPY_FLAG_ZIP_DRIVE = (1 << 4), |
| }; |
| |
| /* 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 code returned in rq->errors to the higher part of the driver. */ |
| #define IDEFLOPPY_ERROR_GENERAL 101 |
| |
| /* |
| * 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); |
| } |
| |
| /* |
| * 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_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 ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
| unsigned int bcount, int direction) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| 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); |
| if (direction) |
| hwif->output_data(drive, NULL, data, count); |
| else |
| hwif->input_data(drive, NULL, data, count); |
| bvec_kunmap_irq(data, &flags); |
| |
| bcount -= count; |
| pc->b_count += count; |
| done += count; |
| } |
| |
| idefloppy_end_request(drive, 1, done >> 9); |
| |
| if (bcount) { |
| printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", |
| drive->name, __func__, bcount); |
| ide_pad_transfer(drive, direction, bcount); |
| } |
| } |
| |
| static void idefloppy_update_buffers(ide_drive_t *drive, |
| struct ide_atapi_pc *pc) |
| { |
| struct request *rq = pc->rq; |
| struct bio *bio = rq->bio; |
| |
| while ((bio = rq->bio) != NULL) |
| idefloppy_end_request(drive, 1, 0); |
| } |
| |
| /* |
| * Generate 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, struct ide_atapi_pc *pc, |
| struct request *rq) |
| { |
| struct ide_floppy_obj *floppy = drive->driver_data; |
| |
| blk_rq_init(NULL, rq); |
| rq->buffer = (char *) pc; |
| rq->cmd_type = REQ_TYPE_SPECIAL; |
| rq->cmd_flags |= REQ_PREEMPT; |
| rq->rq_disk = floppy->disk; |
| ide_do_drive_cmd(drive, rq); |
| } |
| |
| static struct ide_atapi_pc *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 ide_floppy_callback(ide_drive_t *drive) |
| { |
| idefloppy_floppy_t *floppy = drive->driver_data; |
| struct ide_atapi_pc *pc = floppy->pc; |
| int uptodate = pc->error ? 0 : 1; |
| |
| debug_log("Reached %s\n", __func__); |
| |
| if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || |
| (pc->rq && blk_pc_request(pc->rq))) |
| uptodate = 1; /* FIXME */ |
| else if (pc->c[0] == GPCMD_REQUEST_SENSE) { |
| u8 *buf = floppy->pc->buf; |
| |
| if (!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, ", floppy->failed_pc->c[0]); |
| |
| debug_log("sense key = %x, asc = %x, ascq = %x\n", |
| floppy->sense_key, floppy->asc, floppy->ascq); |
| } else |
| printk(KERN_ERR "Error in REQUEST SENSE itself - " |
| "Aborting request!\n"); |
| } |
| |
| idefloppy_end_request(drive, uptodate, 0); |
| } |
| |
| static void idefloppy_init_pc(struct ide_atapi_pc *pc) |
| { |
| memset(pc->c, 0, 12); |
| pc->retries = 0; |
| pc->flags = 0; |
| pc->req_xfer = 0; |
| pc->buf = pc->pc_buf; |
| pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE; |
| pc->callback = ide_floppy_callback; |
| } |
| |
| static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc) |
| { |
| idefloppy_init_pc(pc); |
| pc->c[0] = GPCMD_REQUEST_SENSE; |
| pc->c[4] = 255; |
| pc->req_xfer = 18; |
| } |
| |
| /* |
| * 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) |
| { |
| struct ide_atapi_pc *pc; |
| struct request *rq; |
| |
| (void)ide_read_error(drive); |
| 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); |
| } |
| |
| /* The usual interrupt handler 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; |
| struct ide_atapi_pc *pc = floppy->pc; |
| struct request *rq = pc->rq; |
| xfer_func_t *xferfunc; |
| unsigned int temp; |
| int dma_error = 0; |
| u16 bcount; |
| u8 stat, ireason; |
| |
| debug_log("Reached %s interrupt handler\n", __func__); |
| |
| if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
| dma_error = hwif->dma_ops->dma_end(drive); |
| if (dma_error) { |
| printk(KERN_ERR "%s: DMA %s error\n", drive->name, |
| rq_data_dir(rq) ? "write" : "read"); |
| pc->flags |= PC_FLAG_DMA_ERROR; |
| } else { |
| pc->xferred = pc->req_xfer; |
| idefloppy_update_buffers(drive, pc); |
| } |
| debug_log("DMA finished\n"); |
| } |
| |
| /* Clear the interrupt */ |
| stat = ide_read_status(drive); |
| |
| /* No more interrupts */ |
| if ((stat & DRQ_STAT) == 0) { |
| debug_log("Packet command completed, %d bytes transferred\n", |
| pc->xferred); |
| pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; |
| |
| local_irq_enable_in_hardirq(); |
| |
| if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
| /* Error detected */ |
| debug_log("%s: I/O error\n", drive->name); |
| rq->errors++; |
| if (pc->c[0] == GPCMD_REQUEST_SENSE) { |
| printk(KERN_ERR "%s: I/O error in request sense" |
| " command\n", drive->name); |
| 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 (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
| pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; |
| printk(KERN_ERR "%s: The device wants to issue more interrupts " |
| "in DMA mode\n", drive->name); |
| ide_dma_off(drive); |
| return ide_do_reset(drive); |
| } |
| |
| /* Get the number of bytes to transfer */ |
| bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | |
| hwif->INB(hwif->io_ports.lbam_addr); |
| /* on this interrupt */ |
| ireason = hwif->INB(hwif->io_ports.nsect_addr); |
| |
| if (ireason & CD) { |
| printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
| return ide_do_reset(drive); |
| } |
| if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) { |
| /* Hopefully, we will never get here */ |
| printk(KERN_ERR "%s: We wanted to %s, but the device wants us " |
| "to %s!\n", drive->name, |
| (ireason & IO) ? "Write" : "Read", |
| (ireason & IO) ? "Read" : "Write"); |
| return ide_do_reset(drive); |
| } |
| if (!(pc->flags & PC_FLAG_WRITING)) { |
| /* Reading - Check that we have enough space */ |
| temp = pc->xferred + bcount; |
| if (temp > pc->req_xfer) { |
| if (temp > pc->buf_size) { |
| printk(KERN_ERR "%s: The device wants to send " |
| "us more data than expected - " |
| "discarding data\n", |
| drive->name); |
| ide_pad_transfer(drive, 0, bcount); |
| |
| ide_set_handler(drive, |
| &idefloppy_pc_intr, |
| IDEFLOPPY_WAIT_CMD, |
| NULL); |
| return ide_started; |
| } |
| debug_log("The device wants to send us more data than " |
| "expected - allowing transfer\n"); |
| } |
| } |
| if (pc->flags & PC_FLAG_WRITING) |
| xferfunc = hwif->output_data; |
| else |
| xferfunc = hwif->input_data; |
| |
| if (pc->buf) |
| xferfunc(drive, NULL, pc->cur_pos, bcount); |
| else |
| ide_floppy_io_buffers(drive, pc, bcount, |
| !!(pc->flags & PC_FLAG_WRITING)); |
| |
| /* Update the current position */ |
| pc->xferred += bcount; |
| pc->cur_pos += bcount; |
| |
| /* And set the interrupt handler again */ |
| ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); |
| 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 |
| * that it is 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 */ |
| drive->hwif->output_data(drive, NULL, 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; |
| struct ide_atapi_pc *pc = floppy->pc; |
| ide_expiry_t *expiry; |
| unsigned int timeout; |
| |
| /* |
| * The following delay solves a problem with ATAPI Zip 100 drives |
| * where the Busy flag was apparently being deasserted before the |
| * unit was ready to receive data. This was happening on a |
| * 1200 MHz Athlon system. 10/26/01 25msec is too short, |
| * 40 and 50msec work well. idefloppy_pc_intr will not be actually |
| * used until after the packet is moved in about 50 msec. |
| */ |
| if (pc->flags & PC_FLAG_ZIP_DRIVE) { |
| timeout = floppy->ticks; |
| expiry = &idefloppy_transfer_pc2; |
| } else { |
| timeout = IDEFLOPPY_WAIT_CMD; |
| expiry = NULL; |
| } |
| |
| return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry); |
| } |
| |
| static void ide_floppy_report_error(idefloppy_floppy_t *floppy, |
| struct ide_atapi_pc *pc) |
| { |
| /* supress error messages resulting from Medium not present */ |
| if (floppy->sense_key == 0x02 && |
| floppy->asc == 0x3a && |
| floppy->ascq == 0x00) |
| return; |
| |
| printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " |
| "asc = %2x, ascq = %2x\n", |
| floppy->drive->name, pc->c[0], floppy->sense_key, |
| floppy->asc, floppy->ascq); |
| |
| } |
| |
| static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, |
| struct ide_atapi_pc *pc) |
| { |
| idefloppy_floppy_t *floppy = drive->driver_data; |
| ide_hwif_t *hwif = drive->hwif; |
| 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) { |
| if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) |
| ide_floppy_report_error(floppy, pc); |
| /* 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->xferred = 0; |
| pc->cur_pos = pc->buf; |
| bcount = min(pc->req_xfer, 63 * 1024); |
| |
| if (pc->flags & PC_FLAG_DMA_ERROR) { |
| pc->flags &= ~PC_FLAG_DMA_ERROR; |
| ide_dma_off(drive); |
| } |
| dma = 0; |
| |
| if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) |
| dma = !hwif->dma_ops->dma_setup(drive); |
| |
| if (!dma) |
| pc->flags &= ~PC_FLAG_DMA_OK; |
| |
| ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma); |
| |
| if (pc->flags & PC_FLAG_DRQ_INTERRUPT) { |
| /* Issue the packet command */ |
| ide_execute_command(drive, WIN_PACKETCMD, |
| &idefloppy_transfer_pc1, |
| IDEFLOPPY_WAIT_CMD, |
| NULL); |
| return ide_started; |
| } else { |
| /* Issue the packet command */ |
| ide_execute_pkt_cmd(drive); |
| return idefloppy_transfer_pc1(drive); |
| } |
| } |
| |
| static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *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(struct ide_atapi_pc *pc) |
| { |
| idefloppy_init_pc(pc); |
| pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; |
| pc->c[7] = 255; |
| pc->c[8] = 255; |
| pc->req_xfer = 255; |
| } |
| |
| static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, |
| int l, int flags) |
| { |
| idefloppy_init_pc(pc); |
| pc->c[0] = GPCMD_FORMAT_UNIT; |
| pc->c[1] = 0x17; |
| |
| memset(pc->buf, 0, 12); |
| pc->buf[1] = 0xA2; |
| /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ |
| |
| if (flags & 1) /* Verify bit on... */ |
| pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ |
| pc->buf[3] = 8; |
| |
| put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); |
| put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); |
| pc->buf_size = 12; |
| pc->flags |= PC_FLAG_WRITING; |
| } |
| |
| /* A mode sense command is used to "sense" floppy parameters. */ |
| static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *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->req_xfer = length; |
| } |
| |
| static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *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(struct ide_atapi_pc *pc) |
| { |
| idefloppy_init_pc(pc); |
| pc->c[0] = GPCMD_TEST_UNIT_READY; |
| } |
| |
| static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, |
| struct ide_atapi_pc *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_rw10_cmd: block == %d, blocks == %d\n", |
| block, blocks); |
| |
| idefloppy_init_pc(pc); |
| 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->rq = rq; |
| pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; |
| if (rq->cmd_flags & REQ_RW) |
| pc->flags |= PC_FLAG_WRITING; |
| pc->buf = NULL; |
| pc->req_xfer = pc->buf_size = blocks * floppy->block_size; |
| pc->flags |= PC_FLAG_DMA_OK; |
| } |
| |
| static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, |
| struct ide_atapi_pc *pc, struct request *rq) |
| { |
| idefloppy_init_pc(pc); |
| 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) |
| pc->flags |= PC_FLAG_WRITING; |
| pc->buf = rq->data; |
| if (rq->bio) |
| pc->flags |= PC_FLAG_DMA_OK; |
| /* |
| * possibly problematic, doesn't look like ide-floppy correctly |
| * handled scattered requests if dma fails... |
| */ |
| pc->req_xfer = pc->buf_size = rq->data_len; |
| } |
| |
| 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; |
| struct ide_atapi_pc *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) |
| ide_floppy_report_error(floppy, floppy->failed_pc); |
| else |
| printk(KERN_ERR "ide-floppy: %s: I/O error\n", |
| drive->name); |
| idefloppy_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(KERN_ERR "%s: unsupported r/w request size\n", |
| drive->name); |
| idefloppy_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 = (struct ide_atapi_pc *) 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_end_request(drive, 0, 0); |
| return ide_stopped; |
| } |
| |
| if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) |
| pc->flags |= PC_FLAG_DRQ_INTERRUPT; |
| |
| if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) |
| pc->flags |= PC_FLAG_ZIP_DRIVE; |
| |
| pc->rq = rq; |
| |
| return idefloppy_issue_pc(drive, pc); |
| } |
| |
| /* |
| * Add a special packet command request to the tail of the request queue, |
| * and wait for it to be serviced. |
| */ |
| static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc) |
| { |
| struct ide_floppy_obj *floppy = drive->driver_data; |
| struct request *rq; |
| int error; |
| |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->buffer = (char *) pc; |
| rq->cmd_type = REQ_TYPE_SPECIAL; |
| error = blk_execute_rq(drive->queue, floppy->disk, rq, 0); |
| blk_put_request(rq); |
| |
| return error; |
| } |
| |
| /* |
| * 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; |
| struct ide_atapi_pc 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.buf[3] & 0x80); |
| set_disk_ro(floppy->disk, floppy->wp); |
| page = &pc.buf[8]; |
| |
| transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]); |
| sector_size = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]); |
| cyls = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]); |
| rpm = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]); |
| heads = pc.buf[8 + 4]; |
| sectors = pc.buf[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; |
| struct ide_atapi_pc pc; |
| |
| floppy->srfp = 0; |
| idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, |
| MODE_SENSE_CURRENT); |
| |
| pc.flags |= PC_FLAG_SUPPRESS_ERROR; |
| if (idefloppy_queue_pc_tail(drive, &pc)) |
| return 1; |
| |
| floppy->srfp = pc.buf[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; |
| struct ide_atapi_pc 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.buf[3]; |
| cap_desc = &pc.buf[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.buf[desc_start]); |
| length = be16_to_cpu(*(u16 *)&pc.buf[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.buf[desc_start + 4] & 0x03) { |
| /* Clik! drive returns this instead of CAPACITY_CURRENT */ |
| case CAPACITY_UNFORMATTED: |
| if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) |
| /* |
| * 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.buf[desc_start + 4] & 0x03); |
| } |
| |
| /* Clik! disk does not support get_flexible_disk_page */ |
| if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) |
| (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) |
| { |
| struct ide_atapi_pc 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.buf[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.buf[desc_start]); |
| length = be16_to_cpu(*(u16 *)&pc.buf[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; |
| struct ide_atapi_pc 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 = ide_read_status(drive); |
| local_irq_restore(flags); |
| |
| progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; |
| } |
| if (put_user(progress_indication, arg)) |
| return (-EFAULT); |
| |
| return (0); |
| } |
| |
| 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; |
| } |
| |
| /* |
| * Check whether 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) |
| { |
| u8 gcw[2]; |
| u8 device_type, protocol, removable, drq_type, packet_size; |
| |
| *((u16 *) &gcw) = id->config; |
| |
| device_type = gcw[1] & 0x1F; |
| removable = (gcw[0] & 0x80) >> 7; |
| protocol = (gcw[1] & 0xC0) >> 6; |
| drq_type = (gcw[0] & 0x60) >> 5; |
| packet_size = gcw[0] & 0x03; |
| |
| #ifdef CONFIG_PPC |
| /* kludge for Apple PowerBook internal zip */ |
| if (device_type == 5 && |
| !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) |
| device_type = 0; |
| #endif |
| |
| if (protocol != 2) |
| printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n", |
| protocol); |
| else if (device_type != 0) |
| printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set " |
| "to floppy\n", device_type); |
| else if (!removable) |
| printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); |
| else if (drq_type == 3) |
| printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not " |
| "supported\n", drq_type); |
| else if (packet_size != 0) |
| printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 " |
| "bytes\n", packet_size); |
| 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; |
| |
| 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 |
| |
| static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) |
| { |
| u8 gcw[2]; |
| |
| *((u16 *) &gcw) = drive->id->config; |
| floppy->pc = floppy->pc_stack; |
| |
| if (((gcw[0] & 0x60) >> 5) == 1) |
| floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT; |
| /* |
| * 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)) { |
| floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE; |
| /* 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); |
| floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE; |
| } |
| |
| (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_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; |
| struct ide_atapi_pc pc; |
| int ret = 0; |
| |
| debug_log("Reached %s\n", __func__); |
| |
| floppy = ide_floppy_get(disk); |
| if (!floppy) |
| return -ENXIO; |
| |
| drive = floppy->drive; |
| |
| floppy->openers++; |
| |
| if (floppy->openers == 1) { |
| floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; |
| /* 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; |
| } |
| floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED; |
| /* IOMEGA Clik! drives do not support lock/unlock commands */ |
| if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { |
| idefloppy_create_prevent_cmd(&pc, 1); |
| (void) idefloppy_queue_pc_tail(drive, &pc); |
| } |
| check_disk_change(inode->i_bdev); |
| } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) { |
| 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; |
| struct ide_atapi_pc pc; |
| |
| debug_log("Reached %s\n", __func__); |
| |
| if (floppy->openers == 1) { |
| /* IOMEGA Clik! drives do not support lock/unlock commands */ |
| if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { |
| idefloppy_create_prevent_cmd(&pc, 0); |
| (void) idefloppy_queue_pc_tail(drive, &pc); |
| } |
| |
| floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; |
| } |
| |
| 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, |
| struct ide_atapi_pc *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 (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { |
| 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; |
| struct ide_atapi_pc pc; |
| |
| if (floppy->openers > 1) { |
| /* Don't format if someone is using the disk */ |
| floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; |
| return -EBUSY; |
| } |
| |
| floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; |
| |
| /* |
| * 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) |
| floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; |
| 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; |
| struct ide_atapi_pc 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; |
| int ret; |
| |
| /* do not scan partitions twice if this is a removable device */ |
| if (drive->attach) { |
| drive->attach = 0; |
| return 0; |
| } |
| ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED); |
| floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED; |
| return ret; |
| } |
| |
| 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; |
| } |
| floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); |
| if (!floppy) { |
| 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; |
| } |
| |
| 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"); |
| MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); |
| |