![Arnd Bergmann](/assets/img/avatar_default.png)
The open and release block_device_operations are currently called with the BKL held. In order to change that, we must first make sure that all drivers that currently rely on this have no regressions. This blindly pushes the BKL into all .open and .release operations for all block drivers to prepare for the next step. The drivers can subsequently replace the BKL with their own locks or remove it completely when it can be shown that it is not needed. The functions blkdev_get and blkdev_put are the only remaining users of the big kernel lock in the block layer, besides a few uses in the ioctl code, none of which need to serialize with blkdev_{get,put}. Most of these two functions is also under the protection of bdev->bd_mutex, including the actual calls to ->open and ->release, and the common code does not access any global data structures that need the BKL. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
999 lines
20 KiB
C
999 lines
20 KiB
C
/*
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* Driver for SWIM (Sander Woz Integrated Machine) floppy controller
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*
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* Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info>
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*
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* based on Alastair Bridgewater SWIM analysis, 2001
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* based on SWIM3 driver (c) Paul Mackerras, 1996
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* based on netBSD IWM driver (c) 1997, 1998 Hauke Fath.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* 2004-08-21 (lv) - Initial implementation
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* 2008-10-30 (lv) - Port to 2.6
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*/
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#include <linux/module.h>
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#include <linux/fd.h>
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#include <linux/slab.h>
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#include <linux/blkdev.h>
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#include <linux/smp_lock.h>
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#include <linux/hdreg.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <asm/macintosh.h>
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#include <asm/mac_via.h>
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#define CARDNAME "swim"
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struct sector_header {
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unsigned char side;
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unsigned char track;
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unsigned char sector;
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unsigned char size;
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unsigned char crc0;
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unsigned char crc1;
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} __attribute__((packed));
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#define DRIVER_VERSION "Version 0.2 (2008-10-30)"
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#define REG(x) unsigned char x, x ## _pad[0x200 - 1];
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struct swim {
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REG(write_data)
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REG(write_mark)
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REG(write_CRC)
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REG(write_parameter)
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REG(write_phase)
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REG(write_setup)
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REG(write_mode0)
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REG(write_mode1)
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REG(read_data)
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REG(read_mark)
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REG(read_error)
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REG(read_parameter)
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REG(read_phase)
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REG(read_setup)
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REG(read_status)
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REG(read_handshake)
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} __attribute__((packed));
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#define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v))
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#define swim_read(base, reg) in_8(&(base)->read_##reg)
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/* IWM registers */
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struct iwm {
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REG(ph0L)
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REG(ph0H)
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REG(ph1L)
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REG(ph1H)
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REG(ph2L)
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REG(ph2H)
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REG(ph3L)
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REG(ph3H)
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REG(mtrOff)
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REG(mtrOn)
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REG(intDrive)
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REG(extDrive)
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REG(q6L)
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REG(q6H)
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REG(q7L)
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REG(q7H)
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} __attribute__((packed));
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#define iwm_write(base, reg, v) out_8(&(base)->reg, (v))
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#define iwm_read(base, reg) in_8(&(base)->reg)
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/* bits in phase register */
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#define SEEK_POSITIVE 0x070
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#define SEEK_NEGATIVE 0x074
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#define STEP 0x071
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#define MOTOR_ON 0x072
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#define MOTOR_OFF 0x076
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#define INDEX 0x073
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#define EJECT 0x077
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#define SETMFM 0x171
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#define SETGCR 0x175
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#define RELAX 0x033
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#define LSTRB 0x008
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#define CA_MASK 0x077
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/* Select values for swim_select and swim_readbit */
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#define READ_DATA_0 0x074
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#define TWOMEG_DRIVE 0x075
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#define SINGLE_SIDED 0x076
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#define DRIVE_PRESENT 0x077
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#define DISK_IN 0x170
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#define WRITE_PROT 0x171
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#define TRACK_ZERO 0x172
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#define TACHO 0x173
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#define READ_DATA_1 0x174
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#define MFM_MODE 0x175
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#define SEEK_COMPLETE 0x176
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#define ONEMEG_MEDIA 0x177
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/* Bits in handshake register */
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#define MARK_BYTE 0x01
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#define CRC_ZERO 0x02
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#define RDDATA 0x04
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#define SENSE 0x08
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#define MOTEN 0x10
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#define ERROR 0x20
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#define DAT2BYTE 0x40
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#define DAT1BYTE 0x80
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/* bits in setup register */
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#define S_INV_WDATA 0x01
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#define S_3_5_SELECT 0x02
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#define S_GCR 0x04
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#define S_FCLK_DIV2 0x08
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#define S_ERROR_CORR 0x10
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#define S_IBM_DRIVE 0x20
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#define S_GCR_WRITE 0x40
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#define S_TIMEOUT 0x80
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/* bits in mode register */
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#define CLFIFO 0x01
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#define ENBL1 0x02
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#define ENBL2 0x04
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#define ACTION 0x08
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#define WRITE_MODE 0x10
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#define HEDSEL 0x20
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#define MOTON 0x80
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/*----------------------------------------------------------------------------*/
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enum drive_location {
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INTERNAL_DRIVE = 0x02,
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EXTERNAL_DRIVE = 0x04,
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};
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enum media_type {
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DD_MEDIA,
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HD_MEDIA,
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};
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struct floppy_state {
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/* physical properties */
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enum drive_location location; /* internal or external drive */
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int head_number; /* single- or double-sided drive */
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/* media */
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int disk_in;
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int ejected;
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enum media_type type;
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int write_protected;
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int total_secs;
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int secpercyl;
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int secpertrack;
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/* in-use information */
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int track;
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int ref_count;
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struct gendisk *disk;
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/* parent controller */
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struct swim_priv *swd;
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};
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enum motor_action {
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OFF,
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ON,
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};
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enum head {
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LOWER_HEAD = 0,
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UPPER_HEAD = 1,
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};
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#define FD_MAX_UNIT 2
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struct swim_priv {
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struct swim __iomem *base;
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spinlock_t lock;
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struct request_queue *queue;
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int floppy_count;
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struct floppy_state unit[FD_MAX_UNIT];
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};
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extern int swim_read_sector_header(struct swim __iomem *base,
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struct sector_header *header);
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extern int swim_read_sector_data(struct swim __iomem *base,
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unsigned char *data);
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static inline void set_swim_mode(struct swim __iomem *base, int enable)
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{
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struct iwm __iomem *iwm_base;
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unsigned long flags;
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if (!enable) {
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swim_write(base, mode0, 0xf8);
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return;
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}
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iwm_base = (struct iwm __iomem *)base;
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local_irq_save(flags);
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iwm_read(iwm_base, q7L);
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iwm_read(iwm_base, mtrOff);
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iwm_read(iwm_base, q6H);
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iwm_write(iwm_base, q7H, 0x57);
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iwm_write(iwm_base, q7H, 0x17);
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iwm_write(iwm_base, q7H, 0x57);
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iwm_write(iwm_base, q7H, 0x57);
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local_irq_restore(flags);
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}
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static inline int get_swim_mode(struct swim __iomem *base)
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{
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unsigned long flags;
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local_irq_save(flags);
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swim_write(base, phase, 0xf5);
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if (swim_read(base, phase) != 0xf5)
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goto is_iwm;
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swim_write(base, phase, 0xf6);
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if (swim_read(base, phase) != 0xf6)
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goto is_iwm;
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swim_write(base, phase, 0xf7);
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if (swim_read(base, phase) != 0xf7)
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goto is_iwm;
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local_irq_restore(flags);
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return 1;
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is_iwm:
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local_irq_restore(flags);
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return 0;
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}
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static inline void swim_select(struct swim __iomem *base, int sel)
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{
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swim_write(base, phase, RELAX);
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via1_set_head(sel & 0x100);
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swim_write(base, phase, sel & CA_MASK);
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}
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static inline void swim_action(struct swim __iomem *base, int action)
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{
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unsigned long flags;
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local_irq_save(flags);
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swim_select(base, action);
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udelay(1);
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swim_write(base, phase, (LSTRB<<4) | LSTRB);
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udelay(1);
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swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F));
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udelay(1);
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local_irq_restore(flags);
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}
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static inline int swim_readbit(struct swim __iomem *base, int bit)
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{
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int stat;
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swim_select(base, bit);
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udelay(10);
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stat = swim_read(base, handshake);
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return (stat & SENSE) == 0;
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}
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static inline void swim_drive(struct swim __iomem *base,
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enum drive_location location)
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{
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if (location == INTERNAL_DRIVE) {
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swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */
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swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */
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} else if (location == EXTERNAL_DRIVE) {
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swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */
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swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */
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}
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}
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static inline void swim_motor(struct swim __iomem *base,
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enum motor_action action)
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{
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if (action == ON) {
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int i;
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swim_action(base, MOTOR_ON);
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for (i = 0; i < 2*HZ; i++) {
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swim_select(base, RELAX);
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if (swim_readbit(base, MOTOR_ON))
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break;
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout(1);
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}
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} else if (action == OFF) {
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swim_action(base, MOTOR_OFF);
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swim_select(base, RELAX);
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}
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}
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static inline void swim_eject(struct swim __iomem *base)
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{
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int i;
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swim_action(base, EJECT);
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for (i = 0; i < 2*HZ; i++) {
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swim_select(base, RELAX);
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if (!swim_readbit(base, DISK_IN))
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break;
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout(1);
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}
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swim_select(base, RELAX);
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}
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static inline void swim_head(struct swim __iomem *base, enum head head)
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{
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/* wait drive is ready */
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if (head == UPPER_HEAD)
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swim_select(base, READ_DATA_1);
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else if (head == LOWER_HEAD)
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swim_select(base, READ_DATA_0);
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}
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static inline int swim_step(struct swim __iomem *base)
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{
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int wait;
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swim_action(base, STEP);
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for (wait = 0; wait < HZ; wait++) {
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout(1);
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swim_select(base, RELAX);
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if (!swim_readbit(base, STEP))
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return 0;
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}
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return -1;
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}
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static inline int swim_track00(struct swim __iomem *base)
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{
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int try;
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swim_action(base, SEEK_NEGATIVE);
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for (try = 0; try < 100; try++) {
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swim_select(base, RELAX);
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if (swim_readbit(base, TRACK_ZERO))
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break;
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if (swim_step(base))
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return -1;
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}
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if (swim_readbit(base, TRACK_ZERO))
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return 0;
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return -1;
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}
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static inline int swim_seek(struct swim __iomem *base, int step)
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{
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if (step == 0)
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return 0;
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if (step < 0) {
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swim_action(base, SEEK_NEGATIVE);
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step = -step;
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} else
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swim_action(base, SEEK_POSITIVE);
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for ( ; step > 0; step--) {
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if (swim_step(base))
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return -1;
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}
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return 0;
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}
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static inline int swim_track(struct floppy_state *fs, int track)
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{
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struct swim __iomem *base = fs->swd->base;
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int ret;
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ret = swim_seek(base, track - fs->track);
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if (ret == 0)
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fs->track = track;
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else {
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swim_track00(base);
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fs->track = 0;
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}
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return ret;
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}
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static int floppy_eject(struct floppy_state *fs)
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{
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struct swim __iomem *base = fs->swd->base;
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swim_drive(base, fs->location);
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swim_motor(base, OFF);
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swim_eject(base);
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fs->disk_in = 0;
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fs->ejected = 1;
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return 0;
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}
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static inline int swim_read_sector(struct floppy_state *fs,
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int side, int track,
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int sector, unsigned char *buffer)
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{
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struct swim __iomem *base = fs->swd->base;
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unsigned long flags;
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struct sector_header header;
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int ret = -1;
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short i;
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swim_track(fs, track);
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swim_write(base, mode1, MOTON);
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swim_head(base, side);
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swim_write(base, mode0, side);
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local_irq_save(flags);
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for (i = 0; i < 36; i++) {
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ret = swim_read_sector_header(base, &header);
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if (!ret && (header.sector == sector)) {
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/* found */
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ret = swim_read_sector_data(base, buffer);
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break;
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}
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}
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local_irq_restore(flags);
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swim_write(base, mode0, MOTON);
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if ((header.side != side) || (header.track != track) ||
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(header.sector != sector))
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return 0;
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return ret;
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}
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static int floppy_read_sectors(struct floppy_state *fs,
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int req_sector, int sectors_nb,
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unsigned char *buffer)
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{
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struct swim __iomem *base = fs->swd->base;
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int ret;
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int side, track, sector;
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int i, try;
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swim_drive(base, fs->location);
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for (i = req_sector; i < req_sector + sectors_nb; i++) {
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int x;
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track = i / fs->secpercyl;
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x = i % fs->secpercyl;
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side = x / fs->secpertrack;
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sector = x % fs->secpertrack + 1;
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try = 5;
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do {
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ret = swim_read_sector(fs, side, track, sector,
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buffer);
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if (try-- == 0)
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return -EIO;
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} while (ret != 512);
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buffer += ret;
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}
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return 0;
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}
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static void redo_fd_request(struct request_queue *q)
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{
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struct request *req;
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struct floppy_state *fs;
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req = blk_fetch_request(q);
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while (req) {
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int err = -EIO;
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fs = req->rq_disk->private_data;
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if (blk_rq_pos(req) >= fs->total_secs)
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goto done;
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if (!fs->disk_in)
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goto done;
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if (rq_data_dir(req) == WRITE && fs->write_protected)
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goto done;
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switch (rq_data_dir(req)) {
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case WRITE:
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/* NOT IMPLEMENTED */
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break;
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case READ:
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err = floppy_read_sectors(fs, blk_rq_pos(req),
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blk_rq_cur_sectors(req),
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req->buffer);
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break;
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}
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done:
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if (!__blk_end_request_cur(req, err))
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req = blk_fetch_request(q);
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}
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}
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static void do_fd_request(struct request_queue *q)
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{
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|
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_unlocked_open(struct block_device *bdev, fmode_t mode)
|
|
{
|
|
int ret;
|
|
|
|
lock_kernel();
|
|
ret = floppy_open(bdev, mode);
|
|
unlock_kernel();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int floppy_release(struct gendisk *disk, fmode_t mode)
|
|
{
|
|
struct floppy_state *fs = disk->private_data;
|
|
struct swim __iomem *base = fs->swd->base;
|
|
|
|
lock_kernel();
|
|
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);
|
|
unlock_kernel();
|
|
|
|
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;
|
|
lock_kernel();
|
|
err = floppy_eject(fs);
|
|
unlock_kernel();
|
|
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 const struct block_device_operations floppy_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = floppy_unlocked_open,
|
|
.release = floppy_release,
|
|
.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(dev, IORESOURCE_MEM, 0);
|
|
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(dev, IORESOURCE_MEM, 0);
|
|
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);
|