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2017-12-16livereload: Fix host comparison when ports aren't presentIvan Vyshnevskyi
2017-11-18livereload: Fix recently broken window.location.reload logicBjørn Erik Pedersen
2017-11-17Add support for multiple staticDirsBjørn Erik Pedersen
2017-08-22livereload: Maintain the scroll position if possibleYihui Xie
2017-06-26Support open "current content page" in browserBjørn Erik Pedersen
2016-12-28livereload: Simplify RefreshPathCameron Moore
2016-03-24livereload: Add missing GoDocBjørn Erik Pedersen
2015-12-22Update embedded livereload.js to 2.2.1 in livereload.goAnthony Fok
2015-12-07Fix copyright headers in source filesBjørn Erik Pedersen
2015-11-23Change the license to Apache 2.0Steve Francia
2015-03-07livereload: apply some Golint rulesbep
2015-01-30url_path => urlPathbep
2015-01-30Fix for issue 839 and 490 on WindowsDan Hersam
2014-10-15Set Content-Type for livereload.jsbep
2014-09-11Enable soft livereload of CSS and imagesbep
2014-05-16Proper integration of live reload with automatic injectionspf13
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/*
 * Driver for SWIM (Sander Woz Integrated Machine) floppy controller
 *
 * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info>
 *
 * based on Alastair Bridgewater SWIM analysis, 2001
 * based on SWIM3 driver (c) Paul Mackerras, 1996
 * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * 2004-08-21 (lv) - Initial implementation
 * 2008-10-30 (lv) - Port to 2.6
 */

#include <linux/module.h>
#include <linux/fd.h>
#include <linux/slab.h>
#include <linux/blk-mq.h>
#include <linux/mutex.h>
#include <linux/hdreg.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/platform_device.h>

#include <asm/mac_via.h>

#define CARDNAME "swim"

struct sector_header {
	unsigned char side;
	unsigned char track;
	unsigned char sector;
	unsigned char size;
	unsigned char crc0;
	unsigned char crc1;
} __attribute__((packed));

#define DRIVER_VERSION "Version 0.2 (2008-10-30)"

#define REG(x)	unsigned char x, x ## _pad[0x200 - 1];

struct swim {
	REG(write_data)
	REG(write_mark)
	REG(write_CRC)
	REG(write_parameter)
	REG(write_phase)
	REG(write_setup)
	REG(write_mode0)
	REG(write_mode1)

	REG(read_data)
	REG(read_mark)
	REG(read_error)
	REG(read_parameter)
	REG(read_phase)
	REG(read_setup)
	REG(read_status)
	REG(read_handshake)
} __attribute__((packed));

#define swim_write(base, reg, v) 	out_8(&(base)->write_##reg, (v))
#define swim_read(base, reg)		in_8(&(base)->read_##reg)

/* IWM registers */

struct iwm {
	REG(ph0L)
	REG(ph0H)
	REG(ph1L)
	REG(ph1H)
	REG(ph2L)
	REG(ph2H)
	REG(ph3L)
	REG(ph3H)
	REG(mtrOff)
	REG(mtrOn)
	REG(intDrive)
	REG(extDrive)
	REG(q6L)
	REG(q6H)
	REG(q7L)
	REG(q7H)
} __attribute__((packed));

#define iwm_write(base, reg, v) 	out_8(&(base)->reg, (v))
#define iwm_read(base, reg)		in_8(&(base)->reg)

/* bits in phase register */

#define SEEK_POSITIVE	0x070
#define SEEK_NEGATIVE	0x074
#define STEP		0x071
#define MOTOR_ON	0x072
#define MOTOR_OFF	0x076
#define INDEX		0x073
#define EJECT		0x077
#define SETMFM		0x171
#define SETGCR		0x175

#define RELAX		0x033
#define LSTRB		0x008

#define CA_MASK		0x077

/* Select values for swim_select and swim_readbit */

#define READ_DATA_0	0x074
#define ONEMEG_DRIVE	0x075
#define SINGLE_SIDED	0x076
#define DRIVE_PRESENT	0x077
#define DISK_IN		0x170
#define WRITE_PROT	0x171
#define TRACK_ZERO	0x172
#define TACHO		0x173
#define READ_DATA_1	0x174
#define GCR_MODE	0x175
#define SEEK_COMPLETE	0x176
#define TWOMEG_MEDIA	0x177

/* Bits in handshake register */

#define MARK_BYTE	0x01
#define CRC_ZERO	0x02
#define RDDATA		0x04
#define SENSE		0x08
#define MOTEN		0x10
#define ERROR		0x20
#define DAT2BYTE	0x40
#define DAT1BYTE	0x80

/* bits in setup register */

#define S_INV_WDATA	0x01
#define S_3_5_SELECT	0x02
#define S_GCR		0x04
#define S_FCLK_DIV2	0x08
#define S_ERROR_CORR	0x10
#define S_IBM_DRIVE	0x20
#define S_GCR_WRITE	0x40
#define S_TIMEOUT	0x80

/* bits in mode register */

#define CLFIFO		0x01
#define ENBL1		0x02
#define ENBL2		0x04
#define ACTION		0x08
#define WRITE_MODE	0x10
#define HEDSEL		0x20
#define MOTON		0x80

/*----------------------------------------------------------------------------*/

enum drive_location {
	INTERNAL_DRIVE = 0x02,
	EXTERNAL_DRIVE = 0x04,
};

enum media_type {
	DD_MEDIA,
	HD_MEDIA,
};

struct floppy_state {

	/* physical properties */

	enum drive_location location;	/* internal or external drive */
	int		 head_number;	/* single- or double-sided drive */

	/* media */

	int		 disk_in;
	int		 ejected;
	enum media_type	 type;
	int		 write_protected;

	int		 total_secs;
	int		 secpercyl;
	int		 secpertrack;

	/* in-use information */

	int		track;
	int		ref_count;

	struct gendisk *disk;
	struct blk_mq_tag_set tag_set;

	/* parent controller */

	struct swim_priv *swd;
};

enum motor_action {
	OFF,
	ON,
};

enum head {
	LOWER_HEAD = 0,
	UPPER_HEAD = 1,
};

#define FD_MAX_UNIT	2

struct swim_priv {
	struct swim __iomem *base;
	spinlock_t lock;
	int floppy_count;
	struct floppy_state unit[FD_MAX_UNIT];
};

extern int swim_read_sector_header(struct swim __iomem *base,
				   struct sector_header *header);
extern int swim_read_sector_data(struct swim __iomem *base,
				 unsigned char *data);

static DEFINE_MUTEX(swim_mutex);
static inline void set_swim_mode(struct swim __iomem *base, int enable)
{
	struct iwm __iomem *iwm_base;
	unsigned long flags;

	if (!enable) {
		swim_write(base, mode0, 0xf8);
		return;
	}

	iwm_base = (struct iwm __iomem *)base;
	local_irq_save(flags);

	iwm_read(iwm_base, q7L);
	iwm_read(iwm_base, mtrOff);
	iwm_read(iwm_base, q6H);

	iwm_write(iwm_base, q7H, 0x57);
	iwm_write(iwm_base, q7H, 0x17);
	iwm_write(iwm_base, q7H, 0x57);
	iwm_write(iwm_base, q7H, 0x57);

	local_irq_restore(flags);
}

static inline int get_swim_mode(struct