| /* |
| * Driver for SWIM (Sander Woz Integrated Machine) floppy controller |
| * |
| * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info> |
| * |
| * based on Alastair Bridgewater SWIM analysis, 2001 |
| * based on SWIM3 driver (c) Paul Mackerras, 1996 |
| * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * 2004-08-21 (lv) - Initial implementation |
| * 2008-10-30 (lv) - Port to 2.6 |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/fd.h> |
| #include <linux/blkdev.h> |
| #include <linux/hdreg.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/platform_device.h> |
| |
| #include <asm/macintosh.h> |
| #include <asm/mac_via.h> |
| |
| #define CARDNAME "swim" |
| |
| struct sector_header { |
| unsigned char side; |
| unsigned char track; |
| unsigned char sector; |
| unsigned char size; |
| unsigned char crc0; |
| unsigned char crc1; |
| } __attribute__((packed)); |
| |
| #define DRIVER_VERSION "Version 0.2 (2008-10-30)" |
| |
| #define REG(x) unsigned char x, x ## _pad[0x200 - 1]; |
| |
| struct swim { |
| REG(write_data) |
| REG(write_mark) |
| REG(write_CRC) |
| REG(write_parameter) |
| REG(write_phase) |
| REG(write_setup) |
| REG(write_mode0) |
| REG(write_mode1) |
| |
| REG(read_data) |
| REG(read_mark) |
| REG(read_error) |
| REG(read_parameter) |
| REG(read_phase) |
| REG(read_setup) |
| REG(read_status) |
| REG(read_handshake) |
| } __attribute__((packed)); |
| |
| #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v)) |
| #define swim_read(base, reg) in_8(&(base)->read_##reg) |
| |
| /* IWM registers */ |
| |
| struct iwm { |
| REG(ph0L) |
| REG(ph0H) |
| REG(ph1L) |
| REG(ph1H) |
| REG(ph2L) |
| REG(ph2H) |
| REG(ph3L) |
| REG(ph3H) |
| REG(mtrOff) |
| REG(mtrOn) |
| REG(intDrive) |
| REG(extDrive) |
| REG(q6L) |
| REG(q6H) |
| REG(q7L) |
| REG(q7H) |
| } __attribute__((packed)); |
| |
| #define iwm_write(base, reg, v) out_8(&(base)->reg, (v)) |
| #define iwm_read(base, reg) in_8(&(base)->reg) |
| |
| /* bits in phase register */ |
| |
| #define SEEK_POSITIVE 0x070 |
| #define SEEK_NEGATIVE 0x074 |
| #define STEP 0x071 |
| #define MOTOR_ON 0x072 |
| #define MOTOR_OFF 0x076 |
| #define INDEX 0x073 |
| #define EJECT 0x077 |
| #define SETMFM 0x171 |
| #define SETGCR 0x175 |
| |
| #define RELAX 0x033 |
| #define LSTRB 0x008 |
| |
| #define CA_MASK 0x077 |
| |
| /* Select values for swim_select and swim_readbit */ |
| |
| #define READ_DATA_0 0x074 |
| #define TWOMEG_DRIVE 0x075 |
| #define SINGLE_SIDED 0x076 |
| #define DRIVE_PRESENT 0x077 |
| #define DISK_IN 0x170 |
| #define WRITE_PROT 0x171 |
| #define TRACK_ZERO 0x172 |
| #define TACHO 0x173 |
| #define READ_DATA_1 0x174 |
| #define MFM_MODE 0x175 |
| #define SEEK_COMPLETE 0x176 |
| #define ONEMEG_MEDIA 0x177 |
| |
| /* Bits in handshake register */ |
| |
| #define MARK_BYTE 0x01 |
| #define CRC_ZERO 0x02 |
| #define RDDATA 0x04 |
| #define SENSE 0x08 |
| #define MOTEN 0x10 |
| #define ERROR 0x20 |
| #define DAT2BYTE 0x40 |
| #define DAT1BYTE 0x80 |
| |
| /* bits in setup register */ |
| |
| #define S_INV_WDATA 0x01 |
| #define S_3_5_SELECT 0x02 |
| #define S_GCR 0x04 |
| #define S_FCLK_DIV2 0x08 |
| #define S_ERROR_CORR 0x10 |
| #define S_IBM_DRIVE 0x20 |
| #define S_GCR_WRITE 0x40 |
| #define S_TIMEOUT 0x80 |
| |
| /* bits in mode register */ |
| |
| #define CLFIFO 0x01 |
| #define ENBL1 0x02 |
| #define ENBL2 0x04 |
| #define ACTION 0x08 |
| #define WRITE_MODE 0x10 |
| #define HEDSEL 0x20 |
| #define MOTON 0x80 |
| |
| /*----------------------------------------------------------------------------*/ |
| |
| enum drive_location { |
| INTERNAL_DRIVE = 0x02, |
| EXTERNAL_DRIVE = 0x04, |
| }; |
| |
| enum media_type { |
| DD_MEDIA, |
| HD_MEDIA, |
| }; |
| |
| struct floppy_state { |
| |
| /* physical properties */ |
| |
| enum drive_location location; /* internal or external drive */ |
| int head_number; /* single- or double-sided drive */ |
| |
| /* media */ |
| |
| int disk_in; |
| int ejected; |
| enum media_type type; |
| int write_protected; |
| |
| int total_secs; |
| int secpercyl; |
| int secpertrack; |
| |
| /* in-use information */ |
| |
| int track; |
| int ref_count; |
| |
| struct gendisk *disk; |
| |
| /* parent controller */ |
| |
| struct swim_priv *swd; |
| }; |
| |
| enum motor_action { |
| OFF, |
| ON, |
| }; |
| |
| enum head { |
| LOWER_HEAD = 0, |
| UPPER_HEAD = 1, |
| }; |
| |
| #define FD_MAX_UNIT 2 |
| |
| struct swim_priv { |
| struct swim __iomem *base; |
| spinlock_t lock; |
| struct request_queue *queue; |
| int floppy_count; |
| struct floppy_state unit[FD_MAX_UNIT]; |
| }; |
| |
| extern int swim_read_sector_header(struct swim __iomem *base, |
| struct sector_header *header); |
| extern int swim_read_sector_data(struct swim __iomem *base, |
| unsigned char *data); |
| |
| static inline void set_swim_mode(struct swim __iomem *base, int enable) |
| { |
| struct iwm __iomem *iwm_base; |
| unsigned long flags; |
| |
| if (!enable) { |
| swim_write(base, mode0, 0xf8); |
| return; |
| } |
| |
| iwm_base = (struct iwm __iomem *)base; |
| local_irq_save(flags); |
| |
| iwm_read(iwm_base, q7L); |
| iwm_read(iwm_base, mtrOff); |
| iwm_read(iwm_base, q6H); |
| |
| iwm_write(iwm_base, q7H, 0x57); |
| iwm_write(iwm_base, q7H, 0x17); |
| iwm_write(iwm_base, q7H, 0x57); |
| iwm_write(iwm_base, q7H, 0x57); |
| |
| local_irq_restore(flags); |
| } |
| |
| static inline int get_swim_mode(struct swim __iomem *base) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| |
| swim_write(base, phase, 0xf5); |
| if (swim_read(base, phase) != 0xf5) |
| goto is_iwm; |
| swim_write(base, phase, 0xf6); |
| if (swim_read(base, phase) != 0xf6) |
| goto is_iwm; |
| swim_write(base, phase, 0xf7); |
| if (swim_read(base, phase) != 0xf7) |
| goto is_iwm; |
| local_irq_restore(flags); |
| return 1; |
| is_iwm: |
| local_irq_restore(flags); |
| return 0; |
| } |
| |
| static inline void swim_select(struct swim __iomem *base, int sel) |
| { |
| swim_write(base, phase, RELAX); |
| |
| via1_set_head(sel & 0x100); |
| |
| swim_write(base, phase, sel & CA_MASK); |
| } |
| |
| static inline void swim_action(struct swim __iomem *base, int action) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| |
| swim_select(base, action); |
| udelay(1); |
| swim_write(base, phase, (LSTRB<<4) | LSTRB); |
| udelay(1); |
| swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F)); |
| udelay(1); |
| |
| local_irq_restore(flags); |
| } |
| |
| static inline int swim_readbit(struct swim __iomem *base, int bit) |
| { |
| int stat; |
| |
| swim_select(base, bit); |
| |
| udelay(10); |
| |
| stat = swim_read(base, handshake); |
| |
| return (stat & SENSE) == 0; |
| } |
| |
| static inline void swim_drive(struct swim __iomem *base, |
| enum drive_location location) |
| { |
| if (location == INTERNAL_DRIVE) { |
| swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */ |
| swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */ |
| } else if (location == EXTERNAL_DRIVE) { |
| swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */ |
| swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */ |
| } |
| } |
| |
| static inline void swim_motor(struct swim __iomem *base, |
| enum motor_action action) |
| { |
| if (action == ON) { |
| int i; |
| |
| swim_action(base, MOTOR_ON); |
| |
| for (i = 0; i < 2*HZ; i++) { |
| swim_select(base, RELAX); |
| if (swim_readbit(base, MOTOR_ON)) |
| break; |
| current->state = TASK_INTERRUPTIBLE; |
| schedule_timeout(1); |
| } |
| } else if (action == OFF) { |
| swim_action(base, MOTOR_OFF); |
| swim_select(base, RELAX); |
| } |
| } |
| |
| static inline void swim_eject(struct swim __iomem *base) |
| { |
| int i; |
| |
| swim_action(base, EJECT); |
| |
| for (i = 0; i < 2*HZ; i++) { |
| swim_select(base, RELAX); |
| if (!swim_readbit(base, DISK_IN)) |
| break; |
| current->state = TASK_INTERRUPTIBLE; |
| schedule_timeout(1); |
| } |
| swim_select(base, RELAX); |
| } |
| |
| static inline void swim_head(struct swim __iomem *base, enum head head) |
| { |
| /* wait drive is ready */ |
| |
| if (head == UPPER_HEAD) |
| swim_select(base, READ_DATA_1); |
| else if (head == LOWER_HEAD) |
| swim_select(base, READ_DATA_0); |
| } |
| |
| static inline int swim_step(struct swim __iomem *base) |
| { |
| int wait; |
| |
| swim_action(base, STEP); |
| |
| for (wait = 0; wait < HZ; wait++) { |
| |
| current->state = TASK_INTERRUPTIBLE; |
| schedule_timeout(1); |
| |
| swim_select(base, RELAX); |
| if (!swim_readbit(base, STEP)) |
| return 0; |
| } |
| return -1; |
| } |
| |
| static inline int swim_track00(struct swim __iomem *base) |
| { |
| int try; |
| |
| swim_action(base, SEEK_NEGATIVE); |
| |
| for (try = 0; try < 100; try++) { |
| |
| swim_select(base, RELAX); |
| if (swim_readbit(base, TRACK_ZERO)) |
| break; |
| |
| if (swim_step(base)) |
| return -1; |
| } |
| |
| if (swim_readbit(base, TRACK_ZERO)) |
| return 0; |
| |
| return -1; |
| } |
| |
| static inline int swim_seek(struct swim __iomem *base, int step) |
| { |
| if (step == 0) |
| return 0; |
| |
| if (step < 0) { |
| swim_action(base, SEEK_NEGATIVE); |
| step = -step; |
| } else |
| swim_action(base, SEEK_POSITIVE); |
| |
| for ( ; step > 0; step--) { |
| if (swim_step(base)) |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static inline int swim_track(struct floppy_state *fs, int track) |
| { |
| struct swim __iomem *base = fs->swd->base; |
| int ret; |
| |
| ret = swim_seek(base, track - fs->track); |
| |
| if (ret == 0) |
| fs->track = track; |
| else { |
| swim_track00(base); |
| fs->track = 0; |
| } |
| |
| return ret; |
| } |
| |
| static int floppy_eject(struct floppy_state *fs) |
| { |
| struct swim __iomem *base = fs->swd->base; |
| |
| swim_drive(base, fs->location); |
| swim_motor(base, OFF); |
| swim_eject(base); |
| |
| fs->disk_in = 0; |
| fs->ejected = 1; |
| |
| return 0; |
| } |
| |
| static inline int swim_read_sector(struct floppy_state *fs, |
| int side, int track, |
| int sector, unsigned char *buffer) |
| { |
| struct swim __iomem *base = fs->swd->base; |
| unsigned long flags; |
| struct sector_header header; |
| int ret = -1; |
| short i; |
| |
| swim_track(fs, track); |
| |
| swim_write(base, mode1, MOTON); |
| swim_head(base, side); |
| swim_write(base, mode0, side); |
| |
| local_irq_save(flags); |
| for (i = 0; i < 36; i++) { |
| ret = swim_read_sector_header(base, &header); |
| if (!ret && (header.sector == sector)) { |
| /* found */ |
| |
| ret = swim_read_sector_data(base, buffer); |
| break; |
| } |
| } |
| local_irq_restore(flags); |
| |
| swim_write(base, mode0, MOTON); |
| |
| if ((header.side != side) || (header.track != track) || |
| (header.sector != sector)) |
| return 0; |
| |
| return ret; |
| } |
| |
| static int floppy_read_sectors(struct floppy_state *fs, |
| int req_sector, int sectors_nb, |
| unsigned char *buffer) |
| { |
| struct swim __iomem *base = fs->swd->base; |
| int ret; |
| int side, track, sector; |
| int i, try; |
| |
| |
| swim_drive(base, fs->location); |
| for (i = req_sector; i < req_sector + sectors_nb; i++) { |
| int x; |
| track = i / fs->secpercyl; |
| x = i % fs->secpercyl; |
| side = x / fs->secpertrack; |
| sector = x % fs->secpertrack + 1; |
| |
| try = 5; |
| do { |
| ret = swim_read_sector(fs, side, track, sector, |
| buffer); |
| if (try-- == 0) |
| return -1; |
| } while (ret != 512); |
| |
| buffer += ret; |
| } |
| |
| return 0; |
| } |
| |
| static void redo_fd_request(struct request_queue *q) |
| { |
| struct request *req; |
| struct floppy_state *fs; |
| |
| while ((req = elv_next_request(q))) { |
| |
| fs = req->rq_disk->private_data; |
| if (blk_rq_pos(req) >= fs->total_secs) { |
| __blk_end_request_cur(req, -EIO); |
| continue; |
| } |
| if (!fs->disk_in) { |
| __blk_end_request_cur(req, -EIO); |
| continue; |
| } |
| if (rq_data_dir(req) == WRITE) { |
| if (fs->write_protected) { |
| __blk_end_request_cur(req, -EIO); |
| continue; |
| } |
| } |
| switch (rq_data_dir(req)) { |
| case WRITE: |
| /* NOT IMPLEMENTED */ |
| __blk_end_request_cur(req, -EIO); |
| break; |
| case READ: |
| if (floppy_read_sectors(fs, blk_rq_pos(req), |
| blk_rq_cur_sectors(req), |
| req->buffer)) { |
| __blk_end_request_cur(req, -EIO); |
| continue; |
| } |
| __blk_end_request_cur(req, 0); |
| break; |
| } |
| } |
| } |
| |
| static void do_fd_request(struct request_queue *q) |
| { |
| redo_fd_request(q); |
| } |
| |
| static struct floppy_struct floppy_type[4] = { |
| { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ |
| { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ |
| { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ |
| { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ |
| }; |
| |
| static int get_floppy_geometry(struct floppy_state *fs, int type, |
| struct floppy_struct **g) |
| { |
| if (type >= ARRAY_SIZE(floppy_type)) |
| return -EINVAL; |
| |
| if (type) |
| *g = &floppy_type[type]; |
| else if (fs->type == HD_MEDIA) /* High-Density media */ |
| *g = &floppy_type[3]; |
| else if (fs->head_number == 2) /* double-sided */ |
| *g = &floppy_type[2]; |
| else |
| *g = &floppy_type[1]; |
| |
| return 0; |
| } |
| |
| static void setup_medium(struct floppy_state *fs) |
| { |
| struct swim __iomem *base = fs->swd->base; |
| |
| if (swim_readbit(base, DISK_IN)) { |
| struct floppy_struct *g; |
| fs->disk_in = 1; |
| fs->write_protected = swim_readbit(base, WRITE_PROT); |
| fs->type = swim_readbit(base, ONEMEG_MEDIA); |
| |
| if (swim_track00(base)) |
| printk(KERN_ERR |
| "SWIM: cannot move floppy head to track 0\n"); |
| |
| swim_track00(base); |
| |
| get_floppy_geometry(fs, 0, &g); |
| fs->total_secs = g->size; |
| fs->secpercyl = g->head * g->sect; |
| fs->secpertrack = g->sect; |
| fs->track = 0; |
| } else { |
| fs->disk_in = 0; |
| } |
| } |
| |
| static int floppy_open(struct block_device *bdev, fmode_t mode) |
| { |
| struct floppy_state *fs = bdev->bd_disk->private_data; |
| struct swim __iomem *base = fs->swd->base; |
| int err; |
| |
| if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) |
| return -EBUSY; |
| |
| if (mode & FMODE_EXCL) |
| fs->ref_count = -1; |
| else |
| fs->ref_count++; |
| |
| swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); |
| udelay(10); |
| swim_drive(base, INTERNAL_DRIVE); |
| swim_motor(base, ON); |
| swim_action(base, SETMFM); |
| if (fs->ejected) |
| setup_medium(fs); |
| if (!fs->disk_in) { |
| err = -ENXIO; |
| goto out; |
| } |
| |
| if (mode & FMODE_NDELAY) |
| return 0; |
| |
| if (mode & (FMODE_READ|FMODE_WRITE)) { |
| check_disk_change(bdev); |
| if ((mode & FMODE_WRITE) && fs->write_protected) { |
| err = -EROFS; |
| goto out; |
| } |
| } |
| return 0; |
| out: |
| if (fs->ref_count < 0) |
| fs->ref_count = 0; |
| else if (fs->ref_count > 0) |
| --fs->ref_count; |
| |
| if (fs->ref_count == 0) |
| swim_motor(base, OFF); |
| return err; |
| } |
| |
| static int floppy_release(struct gendisk *disk, fmode_t mode) |
| { |
| struct floppy_state *fs = disk->private_data; |
| struct swim __iomem *base = fs->swd->base; |
| |
| if (fs->ref_count < 0) |
| fs->ref_count = 0; |
| else if (fs->ref_count > 0) |
| --fs->ref_count; |
| |
| if (fs->ref_count == 0) |
| swim_motor(base, OFF); |
| |
| return 0; |
| } |
| |
| static int floppy_ioctl(struct block_device *bdev, fmode_t mode, |
| unsigned int cmd, unsigned long param) |
| { |
| struct floppy_state *fs = bdev->bd_disk->private_data; |
| int err; |
| |
| if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| switch (cmd) { |
| case FDEJECT: |
| if (fs->ref_count != 1) |
| return -EBUSY; |
| err = floppy_eject(fs); |
| return err; |
| |
| case FDGETPRM: |
| if (copy_to_user((void __user *) param, (void *) &floppy_type, |
| sizeof(struct floppy_struct))) |
| return -EFAULT; |
| break; |
| |
| default: |
| printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n", |
| cmd); |
| return -ENOSYS; |
| } |
| return 0; |
| } |
| |
| static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| { |
| struct floppy_state *fs = bdev->bd_disk->private_data; |
| struct floppy_struct *g; |
| int ret; |
| |
| ret = get_floppy_geometry(fs, 0, &g); |
| if (ret) |
| return ret; |
| |
| geo->heads = g->head; |
| geo->sectors = g->sect; |
| geo->cylinders = g->track; |
| |
| return 0; |
| } |
| |
| static int floppy_check_change(struct gendisk *disk) |
| { |
| struct floppy_state *fs = disk->private_data; |
| |
| return fs->ejected; |
| } |
| |
| static int floppy_revalidate(struct gendisk *disk) |
| { |
| struct floppy_state *fs = disk->private_data; |
| struct swim __iomem *base = fs->swd->base; |
| |
| swim_drive(base, fs->location); |
| |
| if (fs->ejected) |
| setup_medium(fs); |
| |
| if (!fs->disk_in) |
| swim_motor(base, OFF); |
| else |
| fs->ejected = 0; |
| |
| return !fs->disk_in; |
| } |
| |
| static struct block_device_operations floppy_fops = { |
| .owner = THIS_MODULE, |
| .open = floppy_open, |
| .release = floppy_release, |
| .locked_ioctl = floppy_ioctl, |
| .getgeo = floppy_getgeo, |
| .media_changed = floppy_check_change, |
| .revalidate_disk = floppy_revalidate, |
| }; |
| |
| static struct kobject *floppy_find(dev_t dev, int *part, void *data) |
| { |
| struct swim_priv *swd = data; |
| int drive = (*part & 3); |
| |
| if (drive > swd->floppy_count) |
| return NULL; |
| |
| *part = 0; |
| return get_disk(swd->unit[drive].disk); |
| } |
| |
| static int __devinit swim_add_floppy(struct swim_priv *swd, |
| enum drive_location location) |
| { |
| struct floppy_state *fs = &swd->unit[swd->floppy_count]; |
| struct swim __iomem *base = swd->base; |
| |
| fs->location = location; |
| |
| swim_drive(base, location); |
| |
| swim_motor(base, OFF); |
| |
| if (swim_readbit(base, SINGLE_SIDED)) |
| fs->head_number = 1; |
| else |
| fs->head_number = 2; |
| fs->ref_count = 0; |
| fs->ejected = 1; |
| |
| swd->floppy_count++; |
| |
| return 0; |
| } |
| |
| static int __devinit swim_floppy_init(struct swim_priv *swd) |
| { |
| int err; |
| int drive; |
| struct swim __iomem *base = swd->base; |
| |
| /* scan floppy drives */ |
| |
| swim_drive(base, INTERNAL_DRIVE); |
| if (swim_readbit(base, DRIVE_PRESENT)) |
| swim_add_floppy(swd, INTERNAL_DRIVE); |
| swim_drive(base, EXTERNAL_DRIVE); |
| if (swim_readbit(base, DRIVE_PRESENT)) |
| swim_add_floppy(swd, EXTERNAL_DRIVE); |
| |
| /* register floppy drives */ |
| |
| err = register_blkdev(FLOPPY_MAJOR, "fd"); |
| if (err) { |
| printk(KERN_ERR "Unable to get major %d for SWIM floppy\n", |
| FLOPPY_MAJOR); |
| return -EBUSY; |
| } |
| |
| for (drive = 0; drive < swd->floppy_count; drive++) { |
| swd->unit[drive].disk = alloc_disk(1); |
| if (swd->unit[drive].disk == NULL) { |
| err = -ENOMEM; |
| goto exit_put_disks; |
| } |
| swd->unit[drive].swd = swd; |
| } |
| |
| swd->queue = blk_init_queue(do_fd_request, &swd->lock); |
| if (!swd->queue) { |
| err = -ENOMEM; |
| goto exit_put_disks; |
| } |
| |
| for (drive = 0; drive < swd->floppy_count; drive++) { |
| swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE; |
| swd->unit[drive].disk->major = FLOPPY_MAJOR; |
| swd->unit[drive].disk->first_minor = drive; |
| sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); |
| swd->unit[drive].disk->fops = &floppy_fops; |
| swd->unit[drive].disk->private_data = &swd->unit[drive]; |
| swd->unit[drive].disk->queue = swd->queue; |
| set_capacity(swd->unit[drive].disk, 2880); |
| add_disk(swd->unit[drive].disk); |
| } |
| |
| blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, |
| floppy_find, NULL, swd); |
| |
| return 0; |
| |
| exit_put_disks: |
| unregister_blkdev(FLOPPY_MAJOR, "fd"); |
| while (drive--) |
| put_disk(swd->unit[drive].disk); |
| return err; |
| } |
| |
| static int __devinit swim_probe(struct platform_device *dev) |
| { |
| struct resource *res; |
| struct swim __iomem *swim_base; |
| struct swim_priv *swd; |
| int ret; |
| |
| res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs"); |
| if (!res) { |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| if (!request_mem_region(res->start, resource_size(res), CARDNAME)) { |
| ret = -EBUSY; |
| goto out; |
| } |
| |
| swim_base = ioremap(res->start, resource_size(res)); |
| if (!swim_base) { |
| return -ENOMEM; |
| goto out_release_io; |
| } |
| |
| /* probe device */ |
| |
| set_swim_mode(swim_base, 1); |
| if (!get_swim_mode(swim_base)) { |
| printk(KERN_INFO "SWIM device not found !\n"); |
| ret = -ENODEV; |
| goto out_iounmap; |
| } |
| |
| /* set platform driver data */ |
| |
| swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); |
| if (!swd) { |
| ret = -ENOMEM; |
| goto out_iounmap; |
| } |
| platform_set_drvdata(dev, swd); |
| |
| swd->base = swim_base; |
| |
| ret = swim_floppy_init(swd); |
| if (ret) |
| goto out_kfree; |
| |
| return 0; |
| |
| out_kfree: |
| platform_set_drvdata(dev, NULL); |
| kfree(swd); |
| out_iounmap: |
| iounmap(swim_base); |
| out_release_io: |
| release_mem_region(res->start, resource_size(res)); |
| out: |
| return ret; |
| } |
| |
| static int __devexit swim_remove(struct platform_device *dev) |
| { |
| struct swim_priv *swd = platform_get_drvdata(dev); |
| int drive; |
| struct resource *res; |
| |
| blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
| |
| for (drive = 0; drive < swd->floppy_count; drive++) { |
| del_gendisk(swd->unit[drive].disk); |
| put_disk(swd->unit[drive].disk); |
| } |
| |
| unregister_blkdev(FLOPPY_MAJOR, "fd"); |
| |
| blk_cleanup_queue(swd->queue); |
| |
| /* eject floppies */ |
| |
| for (drive = 0; drive < swd->floppy_count; drive++) |
| floppy_eject(&swd->unit[drive]); |
| |
| iounmap(swd->base); |
| |
| res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs"); |
| if (res) |
| release_mem_region(res->start, resource_size(res)); |
| |
| platform_set_drvdata(dev, NULL); |
| kfree(swd); |
| |
| return 0; |
| } |
| |
| static struct platform_driver swim_driver = { |
| .probe = swim_probe, |
| .remove = __devexit_p(swim_remove), |
| .driver = { |
| .name = CARDNAME, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init swim_init(void) |
| { |
| printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION); |
| |
| return platform_driver_register(&swim_driver); |
| } |
| module_init(swim_init); |
| |
| static void __exit swim_exit(void) |
| { |
| platform_driver_unregister(&swim_driver); |
| } |
| module_exit(swim_exit); |
| |
| MODULE_DESCRIPTION("Driver for SWIM floppy controller"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>"); |
| MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |