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960 lines
19 KiB
960 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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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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* 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/blk-mq.h> |
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#include <linux/mutex.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/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 ONEMEG_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 GCR_MODE 0x175 |
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#define SEEK_COMPLETE 0x176 |
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#define TWOMEG_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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struct blk_mq_tag_set tag_set; |
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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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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 DEFINE_MUTEX(swim_mutex); |
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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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set_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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set_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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set_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 blk_status_t 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 BLK_STS_IOERR; |
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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 blk_status_t swim_queue_rq(struct blk_mq_hw_ctx *hctx, |
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const struct blk_mq_queue_data *bd) |
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{ |
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struct floppy_state *fs = hctx->queue->queuedata; |
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struct swim_priv *swd = fs->swd; |
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struct request *req = bd->rq; |
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blk_status_t err; |
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if (!spin_trylock_irq(&swd->lock)) |
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return BLK_STS_DEV_RESOURCE; |
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blk_mq_start_request(req); |
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if (!fs->disk_in || rq_data_dir(req) == WRITE) { |
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err = BLK_STS_IOERR; |
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goto out; |
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} |
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do { |
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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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bio_data(req->bio)); |
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} while (blk_update_request(req, err, blk_rq_cur_bytes(req))); |
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__blk_mq_end_request(req, err); |
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err = BLK_STS_OK; |
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out: |
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spin_unlock_irq(&swd->lock); |
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return err; |
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} |
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static struct floppy_struct floppy_type[4] = { |
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{ 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ |
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{ 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ |
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{ 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ |
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{ 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ |
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}; |
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static int get_floppy_geometry(struct floppy_state *fs, int type, |
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struct floppy_struct **g) |
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{ |
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if (type >= ARRAY_SIZE(floppy_type)) |
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return -EINVAL; |
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if (type) |
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*g = &floppy_type[type]; |
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else if (fs->type == HD_MEDIA) /* High-Density media */ |
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*g = &floppy_type[3]; |
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else if (fs->head_number == 2) /* double-sided */ |
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*g = &floppy_type[2]; |
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else |
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*g = &floppy_type[1]; |
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return 0; |
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} |
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static void setup_medium(struct floppy_state *fs) |
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{ |
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struct swim __iomem *base = fs->swd->base; |
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if (swim_readbit(base, DISK_IN)) { |
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struct floppy_struct *g; |
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fs->disk_in = 1; |
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fs->write_protected = swim_readbit(base, WRITE_PROT); |
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if (swim_track00(base)) |
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printk(KERN_ERR |
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"SWIM: cannot move floppy head to track 0\n"); |
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swim_track00(base); |
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fs->type = swim_readbit(base, TWOMEG_MEDIA) ? |
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HD_MEDIA : DD_MEDIA; |
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fs->head_number = swim_readbit(base, SINGLE_SIDED) ? 1 : 2; |
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get_floppy_geometry(fs, 0, &g); |
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fs->total_secs = g->size; |
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fs->secpercyl = g->head * g->sect; |
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fs->secpertrack = g->sect; |
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fs->track = 0; |
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} else { |
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fs->disk_in = 0; |
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} |
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} |
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static int floppy_open(struct block_device *bdev, fmode_t mode) |
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{ |
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struct floppy_state *fs = bdev->bd_disk->private_data; |
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struct swim __iomem *base = fs->swd->base; |
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int err; |
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|
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if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) |
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return -EBUSY; |
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|
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if (mode & FMODE_EXCL) |
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fs->ref_count = -1; |
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else |
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fs->ref_count++; |
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|
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swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); |
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udelay(10); |
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swim_drive(base, fs->location); |
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swim_motor(base, ON); |
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swim_action(base, SETMFM); |
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if (fs->ejected) |
|
setup_medium(fs); |
|
if (!fs->disk_in) { |
|
err = -ENXIO; |
|
goto out; |
|
} |
|
|
|
set_capacity(fs->disk, fs->total_secs); |
|
|
|
if (mode & FMODE_NDELAY) |
|
return 0; |
|
|
|
if (mode & (FMODE_READ|FMODE_WRITE)) { |
|
if (bdev_check_media_change(bdev) && fs->disk_in) |
|
fs->ejected = 0; |
|
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; |
|
|
|
mutex_lock(&swim_mutex); |
|
ret = floppy_open(bdev, mode); |
|
mutex_unlock(&swim_mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static void floppy_release(struct gendisk *disk, fmode_t mode) |
|
{ |
|
struct floppy_state *fs = disk->private_data; |
|
struct swim __iomem *base = fs->swd->base; |
|
|
|
mutex_lock(&swim_mutex); |
|
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); |
|
mutex_unlock(&swim_mutex); |
|
} |
|
|
|
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; |
|
mutex_lock(&swim_mutex); |
|
err = floppy_eject(fs); |
|
mutex_unlock(&swim_mutex); |
|
return err; |
|
|
|
case FDGETPRM: |
|
if (copy_to_user((void __user *) param, (void *) &floppy_type, |
|
sizeof(struct floppy_struct))) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
return -ENOTTY; |
|
} |
|
|
|
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 unsigned int floppy_check_events(struct gendisk *disk, |
|
unsigned int clearing) |
|
{ |
|
struct floppy_state *fs = disk->private_data; |
|
|
|
return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0; |
|
} |
|
|
|
static const struct block_device_operations floppy_fops = { |
|
.owner = THIS_MODULE, |
|
.open = floppy_unlocked_open, |
|
.release = floppy_release, |
|
.ioctl = floppy_ioctl, |
|
.getgeo = floppy_getgeo, |
|
.check_events = floppy_check_events, |
|
}; |
|
|
|
static int 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); |
|
|
|
fs->type = HD_MEDIA; |
|
fs->head_number = 2; |
|
|
|
fs->ref_count = 0; |
|
fs->ejected = 1; |
|
|
|
swd->floppy_count++; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct blk_mq_ops swim_mq_ops = { |
|
.queue_rq = swim_queue_rq, |
|
}; |
|
|
|
static int 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_readbit(base, ONEMEG_DRIVE)) |
|
swim_add_floppy(swd, INTERNAL_DRIVE); |
|
swim_drive(base, EXTERNAL_DRIVE); |
|
if (swim_readbit(base, DRIVE_PRESENT) && |
|
!swim_readbit(base, ONEMEG_DRIVE)) |
|
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; |
|
} |
|
|
|
spin_lock_init(&swd->lock); |
|
|
|
for (drive = 0; drive < swd->floppy_count; drive++) { |
|
err = blk_mq_alloc_sq_tag_set(&swd->unit[drive].tag_set, |
|
&swim_mq_ops, 2, BLK_MQ_F_SHOULD_MERGE); |
|
if (err) |
|
goto exit_put_disks; |
|
|
|
swd->unit[drive].disk = |
|
blk_mq_alloc_disk(&swd->unit[drive].tag_set, |
|
&swd->unit[drive]); |
|
if (IS_ERR(swd->unit[drive].disk)) { |
|
blk_mq_free_tag_set(&swd->unit[drive].tag_set); |
|
err = PTR_ERR(swd->unit[drive].disk); |
|
goto exit_put_disks; |
|
} |
|
|
|
swd->unit[drive].swd = swd; |
|
} |
|
|
|
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; |
|
swd->unit[drive].disk->minors = 1; |
|
sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); |
|
swd->unit[drive].disk->fops = &floppy_fops; |
|
swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE; |
|
swd->unit[drive].disk->private_data = &swd->unit[drive]; |
|
set_capacity(swd->unit[drive].disk, 2880); |
|
add_disk(swd->unit[drive].disk); |
|
} |
|
|
|
return 0; |
|
|
|
exit_put_disks: |
|
unregister_blkdev(FLOPPY_MAJOR, "fd"); |
|
do { |
|
struct gendisk *disk = swd->unit[drive].disk; |
|
|
|
if (!disk) |
|
continue; |
|
blk_cleanup_disk(disk); |
|
blk_mq_free_tag_set(&swd->unit[drive].tag_set); |
|
} while (drive--); |
|
return err; |
|
} |
|
|
|
static int 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 = (struct swim __iomem *)res->start; |
|
if (!swim_base) { |
|
ret = -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_release_io; |
|
} |
|
|
|
/* set platform driver data */ |
|
|
|
swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); |
|
if (!swd) { |
|
ret = -ENOMEM; |
|
goto out_release_io; |
|
} |
|
platform_set_drvdata(dev, swd); |
|
|
|
swd->base = swim_base; |
|
|
|
ret = swim_floppy_init(swd); |
|
if (ret) |
|
goto out_kfree; |
|
|
|
return 0; |
|
|
|
out_kfree: |
|
kfree(swd); |
|
out_release_io: |
|
release_mem_region(res->start, resource_size(res)); |
|
out: |
|
return ret; |
|
} |
|
|
|
static int swim_remove(struct platform_device *dev) |
|
{ |
|
struct swim_priv *swd = platform_get_drvdata(dev); |
|
int drive; |
|
struct resource *res; |
|
|
|
for (drive = 0; drive < swd->floppy_count; drive++) { |
|
del_gendisk(swd->unit[drive].disk); |
|
blk_cleanup_queue(swd->unit[drive].disk->queue); |
|
blk_mq_free_tag_set(&swd->unit[drive].tag_set); |
|
put_disk(swd->unit[drive].disk); |
|
} |
|
|
|
unregister_blkdev(FLOPPY_MAJOR, "fd"); |
|
|
|
/* eject floppies */ |
|
|
|
for (drive = 0; drive < swd->floppy_count; drive++) |
|
floppy_eject(&swd->unit[drive]); |
|
|
|
res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
|
if (res) |
|
release_mem_region(res->start, resource_size(res)); |
|
|
|
kfree(swd); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver swim_driver = { |
|
.probe = swim_probe, |
|
.remove = swim_remove, |
|
.driver = { |
|
.name = CARDNAME, |
|
}, |
|
}; |
|
|
|
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 <[email protected]>"); |
|
MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
|
|
|