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Message-ID: <20090325152819.GW27476@kernel.dk>
Date: Wed, 25 Mar 2009 16:28:19 +0100
From: Jens Axboe <jens.axboe@...cle.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-kernel@...r.kernel.org,
Laurent Vivier <laurent@...vier.info>,
linux-m68k@...r.kernel.org
Subject: Re: [PATCH 3/6] m68k: mac - Add SWIM floppy support
On Wed, Mar 25 2009, Geert Uytterhoeven wrote:
> Hi Jens,
>
> Is this OK for you to go in through the m68k tree?
Sure!
>
> Thanks!
>
> On Sun, Mar 1, 2009 at 10:21, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > From: Laurent Vivier <laurent@...vier.info>
> >
> > It allows to read data from a floppy, but not to write to, and to eject the
> > floppy (useful on our Mac without eject button).
> >
> > Signed-off-by: Laurent Vivier <Laurent@...vier.info>
> > Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> > Cc: Jens Axboe <axboe@...nel.dk>
> > ---
> > arch/m68k/mac/config.c | 44 ++
> > arch/m68k/mac/via.c | 9 +
> > drivers/block/Kconfig | 7 +
> > drivers/block/Makefile | 3 +
> > drivers/block/swim.c | 995 ++++++++++++++++++++++++++++++++++++++++++++++
> > drivers/block/swim_asm.S | 247 ++++++++++++
> > 6 files changed, 1305 insertions(+), 0 deletions(-)
> > create mode 100644 drivers/block/swim.c
> > create mode 100644 drivers/block/swim_asm.S
> >
> > diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
> > index 3a1c0b2..be01798 100644
> > --- a/arch/m68k/mac/config.c
> > +++ b/arch/m68k/mac/config.c
> > @@ -22,6 +22,7 @@
> > /* keyb */
> > #include <linux/init.h>
> > #include <linux/vt_kern.h>
> > +#include <linux/platform_device.h>
> >
> > #define BOOTINFO_COMPAT_1_0
> > #include <asm/setup.h>
> > @@ -43,6 +44,10 @@
> > #include <asm/mac_oss.h>
> > #include <asm/mac_psc.h>
> >
> > +/* platform device info */
> > +
> > +#define SWIM_IO_SIZE 0x2000 /* SWIM IO resource size */
> > +
> > /* Mac bootinfo struct */
> >
> > struct mac_booter_data mac_bi_data;
> > @@ -870,3 +875,42 @@ static void mac_get_model(char *str)
> > strcpy(str, "Macintosh ");
> > strcat(str, macintosh_config->name);
> > }
> > +
> > +static struct resource swim_resources[1];
> > +
> > +static struct platform_device swim_device = {
> > + .name = "swim",
> > + .id = -1,
> > + .num_resources = ARRAY_SIZE(swim_resources),
> > + .resource = swim_resources,
> > +};
> > +
> > +static struct platform_device *mac_platform_devices[] __initdata = {
> > + &swim_device
> > +};
> > +
> > +int __init mac_platform_init(void)
> > +{
> > + u8 *swim_base;
> > +
> > + switch (macintosh_config->floppy_type) {
> > + case MAC_FLOPPY_SWIM_ADDR1:
> > + swim_base = (u8 *)(VIA1_BASE + 0x1E000);
> > + break;
> > + case MAC_FLOPPY_SWIM_ADDR2:
> > + swim_base = (u8 *)(VIA1_BASE + 0x16000);
> > + break;
> > + default:
> > + return 0;
> > + }
> > +
> > + swim_resources[0].name = "swim-regs";
> > + swim_resources[0].start = (resource_size_t)swim_base;
> > + swim_resources[0].end = (resource_size_t)(swim_base + SWIM_IO_SIZE);
> > + swim_resources[0].flags = IORESOURCE_MEM;
> > +
> > + return platform_add_devices(mac_platform_devices,
> > + ARRAY_SIZE(mac_platform_devices));
> > +}
> > +
> > +arch_initcall(mac_platform_init);
> > diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
> > index 7d97ba5..11bce3c 100644
> > --- a/arch/m68k/mac/via.c
> > +++ b/arch/m68k/mac/via.c
> > @@ -645,3 +645,12 @@ int via_irq_pending(int irq)
> > }
> > return 0;
> > }
> > +
> > +void via1_set_head(int head)
> > +{
> > + if (head == 0)
> > + via1[vBufA] &= ~VIA1A_vHeadSel;
> > + else
> > + via1[vBufA] |= VIA1A_vHeadSel;
> > +}
> > +EXPORT_SYMBOL(via1_set_head);
> > diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
> > index 0344a8a..e7b8aa0 100644
> > --- a/drivers/block/Kconfig
> > +++ b/drivers/block/Kconfig
> > @@ -45,6 +45,13 @@ config MAC_FLOPPY
> > If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
> > floppy controller, say Y here. Most commonly found in PowerMacs.
> >
> > +config BLK_DEV_SWIM
> > + tristate "Support for SWIM Macintosh floppy"
> > + depends on M68K && MAC
> > + help
> > + You should select this option if you want floppy support
> > + and you don't have a II, IIfx, Q900, Q950 or AV series.
> > +
> > config AMIGA_Z2RAM
> > tristate "Amiga Zorro II ramdisk support"
> > depends on ZORRO
> > diff --git a/drivers/block/Makefile b/drivers/block/Makefile
> > index 204332b..b32b7f9 100644
> > --- a/drivers/block/Makefile
> > +++ b/drivers/block/Makefile
> > @@ -6,6 +6,7 @@
> > #
> >
> > obj-$(CONFIG_MAC_FLOPPY) += swim3.o
> > +obj-$(CONFIG_BLK_DEV_SWIM) += swim_mod.o
> > obj-$(CONFIG_BLK_DEV_FD) += floppy.o
> > obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
> > obj-$(CONFIG_PS3_DISK) += ps3disk.o
> > @@ -32,3 +33,5 @@ obj-$(CONFIG_BLK_DEV_UB) += ub.o
> > obj-$(CONFIG_BLK_DEV_HD) += hd.o
> >
> > obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
> > +
> > +swim_mod-objs := swim.o swim_asm.o
> > diff --git a/drivers/block/swim.c b/drivers/block/swim.c
> > new file mode 100644
> > index 0000000..d22cc38
> > --- /dev/null
> > +++ b/drivers/block/swim.c
> > @@ -0,0 +1,995 @@
> > +/*
> > + * Driver for SWIM (Sander Woz Integrated Machine) floppy controller
> > + *
> > + * Copyright (C) 2004,2008 Laurent Vivier <Laurent@...vier.info>
> > + *
> > + * based on Alastair Bridgewater SWIM analysis, 2001
> > + * based on SWIM3 driver (c) Paul Mackerras, 1996
> > + * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath.
> > + *
> > + * This program is free software; you can redistribute it and/or
> > + * modify it under the terms of the GNU General Public License
> > + * as published by the Free Software Foundation; either version
> > + * 2 of the License, or (at your option) any later version.
> > + *
> > + * 2004-08-21 (lv) - Initial implementation
> > + * 2008-10-30 (lv) - Port to 2.6
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/fd.h>
> > +#include <linux/blkdev.h>
> > +#include <linux/hdreg.h>
> > +#include <linux/kernel.h>
> > +#include <linux/delay.h>
> > +#include <linux/platform_device.h>
> > +
> > +#include <asm/macintosh.h>
> > +#include <asm/mac_via.h>
> > +
> > +#define CARDNAME "swim"
> > +
> > +struct sector_header {
> > + unsigned char side;
> > + unsigned char track;
> > + unsigned char sector;
> > + unsigned char size;
> > + unsigned char crc0;
> > + unsigned char crc1;
> > +} __attribute__((packed));
> > +
> > +#define DRIVER_VERSION "Version 0.2 (2008-10-30)"
> > +
> > +#define REG(x) unsigned char x, x ## _pad[0x200 - 1];
> > +
> > +struct swim {
> > + REG(write_data)
> > + REG(write_mark)
> > + REG(write_CRC)
> > + REG(write_parameter)
> > + REG(write_phase)
> > + REG(write_setup)
> > + REG(write_mode0)
> > + REG(write_mode1)
> > +
> > + REG(read_data)
> > + REG(read_mark)
> > + REG(read_error)
> > + REG(read_parameter)
> > + REG(read_phase)
> > + REG(read_setup)
> > + REG(read_status)
> > + REG(read_handshake)
> > +} __attribute__((packed));
> > +
> > +#define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v))
> > +#define swim_read(base, reg) in_8(&(base)->read_##reg)
> > +
> > +/* IWM registers */
> > +
> > +struct iwm {
> > + REG(ph0L)
> > + REG(ph0H)
> > + REG(ph1L)
> > + REG(ph1H)
> > + REG(ph2L)
> > + REG(ph2H)
> > + REG(ph3L)
> > + REG(ph3H)
> > + REG(mtrOff)
> > + REG(mtrOn)
> > + REG(intDrive)
> > + REG(extDrive)
> > + REG(q6L)
> > + REG(q6H)
> > + REG(q7L)
> > + REG(q7H)
> > +} __attribute__((packed));
> > +
> > +#define iwm_write(base, reg, v) out_8(&(base)->reg, (v))
> > +#define iwm_read(base, reg) in_8(&(base)->reg)
> > +
> > +/* bits in phase register */
> > +
> > +#define SEEK_POSITIVE 0x070
> > +#define SEEK_NEGATIVE 0x074
> > +#define STEP 0x071
> > +#define MOTOR_ON 0x072
> > +#define MOTOR_OFF 0x076
> > +#define INDEX 0x073
> > +#define EJECT 0x077
> > +#define SETMFM 0x171
> > +#define SETGCR 0x175
> > +
> > +#define RELAX 0x033
> > +#define LSTRB 0x008
> > +
> > +#define CA_MASK 0x077
> > +
> > +/* Select values for swim_select and swim_readbit */
> > +
> > +#define READ_DATA_0 0x074
> > +#define TWOMEG_DRIVE 0x075
> > +#define SINGLE_SIDED 0x076
> > +#define DRIVE_PRESENT 0x077
> > +#define DISK_IN 0x170
> > +#define WRITE_PROT 0x171
> > +#define TRACK_ZERO 0x172
> > +#define TACHO 0x173
> > +#define READ_DATA_1 0x174
> > +#define MFM_MODE 0x175
> > +#define SEEK_COMPLETE 0x176
> > +#define ONEMEG_MEDIA 0x177
> > +
> > +/* Bits in handshake register */
> > +
> > +#define MARK_BYTE 0x01
> > +#define CRC_ZERO 0x02
> > +#define RDDATA 0x04
> > +#define SENSE 0x08
> > +#define MOTEN 0x10
> > +#define ERROR 0x20
> > +#define DAT2BYTE 0x40
> > +#define DAT1BYTE 0x80
> > +
> > +/* bits in setup register */
> > +
> > +#define S_INV_WDATA 0x01
> > +#define S_3_5_SELECT 0x02
> > +#define S_GCR 0x04
> > +#define S_FCLK_DIV2 0x08
> > +#define S_ERROR_CORR 0x10
> > +#define S_IBM_DRIVE 0x20
> > +#define S_GCR_WRITE 0x40
> > +#define S_TIMEOUT 0x80
> > +
> > +/* bits in mode register */
> > +
> > +#define CLFIFO 0x01
> > +#define ENBL1 0x02
> > +#define ENBL2 0x04
> > +#define ACTION 0x08
> > +#define WRITE_MODE 0x10
> > +#define HEDSEL 0x20
> > +#define MOTON 0x80
> > +
> > +/*----------------------------------------------------------------------------*/
> > +
> > +enum drive_location {
> > + INTERNAL_DRIVE = 0x02,
> > + EXTERNAL_DRIVE = 0x04,
> > +};
> > +
> > +enum media_type {
> > + DD_MEDIA,
> > + HD_MEDIA,
> > +};
> > +
> > +struct floppy_state {
> > +
> > + /* physical properties */
> > +
> > + enum drive_location location; /* internal or external drive */
> > + int head_number; /* single- or double-sided drive */
> > +
> > + /* media */
> > +
> > + int disk_in;
> > + int ejected;
> > + enum media_type type;
> > + int write_protected;
> > +
> > + int total_secs;
> > + int secpercyl;
> > + int secpertrack;
> > +
> > + /* in-use information */
> > +
> > + int track;
> > + int ref_count;
> > +
> > + struct gendisk *disk;
> > +
> > + /* parent controller */
> > +
> > + struct swim_priv *swd;
> > +};
> > +
> > +enum motor_action {
> > + OFF,
> > + ON,
> > +};
> > +
> > +enum head {
> > + LOWER_HEAD = 0,
> > + UPPER_HEAD = 1,
> > +};
> > +
> > +#define FD_MAX_UNIT 2
> > +
> > +struct swim_priv {
> > + struct swim __iomem *base;
> > + spinlock_t lock;
> > + struct request_queue *queue;
> > + int floppy_count;
> > + struct floppy_state unit[FD_MAX_UNIT];
> > +};
> > +
> > +extern int swim_read_sector_header(struct swim __iomem *base,
> > + struct sector_header *header);
> > +extern int swim_read_sector_data(struct swim __iomem *base,
> > + unsigned char *data);
> > +
> > +static inline void set_swim_mode(struct swim __iomem *base, int enable)
> > +{
> > + struct iwm __iomem *iwm_base;
> > + unsigned long flags;
> > +
> > + if (!enable) {
> > + swim_write(base, mode0, 0xf8);
> > + return;
> > + }
> > +
> > + iwm_base = (struct iwm __iomem *)base;
> > + local_irq_save(flags);
> > +
> > + iwm_read(iwm_base, q7L);
> > + iwm_read(iwm_base, mtrOff);
> > + iwm_read(iwm_base, q6H);
> > +
> > + iwm_write(iwm_base, q7H, 0x57);
> > + iwm_write(iwm_base, q7H, 0x17);
> > + iwm_write(iwm_base, q7H, 0x57);
> > + iwm_write(iwm_base, q7H, 0x57);
> > +
> > + local_irq_restore(flags);
> > +}
> > +
> > +static inline int get_swim_mode(struct swim __iomem *base)
> > +{
> > + unsigned long flags;
> > +
> > + local_irq_save(flags);
> > +
> > + swim_write(base, phase, 0xf5);
> > + if (swim_read(base, phase) != 0xf5)
> > + goto is_iwm;
> > + swim_write(base, phase, 0xf6);
> > + if (swim_read(base, phase) != 0xf6)
> > + goto is_iwm;
> > + swim_write(base, phase, 0xf7);
> > + if (swim_read(base, phase) != 0xf7)
> > + goto is_iwm;
> > + local_irq_restore(flags);
> > + return 1;
> > +is_iwm:
> > + local_irq_restore(flags);
> > + return 0;
> > +}
> > +
> > +static inline void swim_select(struct swim __iomem *base, int sel)
> > +{
> > + swim_write(base, phase, RELAX);
> > +
> > + via1_set_head(sel & 0x100);
> > +
> > + swim_write(base, phase, sel & CA_MASK);
> > +}
> > +
> > +static inline void swim_action(struct swim __iomem *base, int action)
> > +{
> > + unsigned long flags;
> > +
> > + local_irq_save(flags);
> > +
> > + swim_select(base, action);
> > + udelay(1);
> > + swim_write(base, phase, (LSTRB<<4) | LSTRB);
> > + udelay(1);
> > + swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F));
> > + udelay(1);
> > +
> > + local_irq_restore(flags);
> > +}
> > +
> > +static inline int swim_readbit(struct swim __iomem *base, int bit)
> > +{
> > + int stat;
> > +
> > + swim_select(base, bit);
> > +
> > + udelay(10);
> > +
> > + stat = swim_read(base, handshake);
> > +
> > + return (stat & SENSE) == 0;
> > +}
> > +
> > +static inline void swim_drive(struct swim __iomem *base,
> > + enum drive_location location)
> > +{
> > + if (location == INTERNAL_DRIVE) {
> > + swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */
> > + swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */
> > + } else if (location == EXTERNAL_DRIVE) {
> > + swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */
> > + swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */
> > + }
> > +}
> > +
> > +static inline void swim_motor(struct swim __iomem *base,
> > + enum motor_action action)
> > +{
> > + if (action == ON) {
> > + int i;
> > +
> > + swim_action(base, MOTOR_ON);
> > +
> > + for (i = 0; i < 2*HZ; i++) {
> > + swim_select(base, RELAX);
> > + if (swim_readbit(base, MOTOR_ON))
> > + break;
> > + current->state = TASK_INTERRUPTIBLE;
> > + schedule_timeout(1);
> > + }
> > + } else if (action == OFF) {
> > + swim_action(base, MOTOR_OFF);
> > + swim_select(base, RELAX);
> > + }
> > +}
> > +
> > +static inline void swim_eject(struct swim __iomem *base)
> > +{
> > + int i;
> > +
> > + swim_action(base, EJECT);
> > +
> > + for (i = 0; i < 2*HZ; i++) {
> > + swim_select(base, RELAX);
> > + if (!swim_readbit(base, DISK_IN))
> > + break;
> > + current->state = TASK_INTERRUPTIBLE;
> > + schedule_timeout(1);
> > + }
> > + swim_select(base, RELAX);
> > +}
> > +
> > +static inline void swim_head(struct swim __iomem *base, enum head head)
> > +{
> > + /* wait drive is ready */
> > +
> > + if (head == UPPER_HEAD)
> > + swim_select(base, READ_DATA_1);
> > + else if (head == LOWER_HEAD)
> > + swim_select(base, READ_DATA_0);
> > +}
> > +
> > +static inline int swim_step(struct swim __iomem *base)
> > +{
> > + int wait;
> > +
> > + swim_action(base, STEP);
> > +
> > + for (wait = 0; wait < HZ; wait++) {
> > +
> > + current->state = TASK_INTERRUPTIBLE;
> > + schedule_timeout(1);
> > +
> > + swim_select(base, RELAX);
> > + if (!swim_readbit(base, STEP))
> > + return 0;
> > + }
> > + return -1;
> > +}
> > +
> > +static inline int swim_track00(struct swim __iomem *base)
> > +{
> > + int try;
> > +
> > + swim_action(base, SEEK_NEGATIVE);
> > +
> > + for (try = 0; try < 100; try++) {
> > +
> > + swim_select(base, RELAX);
> > + if (swim_readbit(base, TRACK_ZERO))
> > + break;
> > +
> > + if (swim_step(base))
> > + return -1;
> > + }
> > +
> > + if (swim_readbit(base, TRACK_ZERO))
> > + return 0;
> > +
> > + return -1;
> > +}
> > +
> > +static inline int swim_seek(struct swim __iomem *base, int step)
> > +{
> > + if (step == 0)
> > + return 0;
> > +
> > + if (step < 0) {
> > + swim_action(base, SEEK_NEGATIVE);
> > + step = -step;
> > + } else
> > + swim_action(base, SEEK_POSITIVE);
> > +
> > + for ( ; step > 0; step--) {
> > + if (swim_step(base))
> > + return -1;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static inline int swim_track(struct floppy_state *fs, int track)
> > +{
> > + struct swim __iomem *base = fs->swd->base;
> > + int ret;
> > +
> > + ret = swim_seek(base, track - fs->track);
> > +
> > + if (ret == 0)
> > + fs->track = track;
> > + else {
> > + swim_track00(base);
> > + fs->track = 0;
> > + }
> > +
> > + return ret;
> > +}
> > +
> > +static int floppy_eject(struct floppy_state *fs)
> > +{
> > + struct swim __iomem *base = fs->swd->base;
> > +
> > + swim_drive(base, fs->location);
> > + swim_motor(base, OFF);
> > + swim_eject(base);
> > +
> > + fs->disk_in = 0;
> > + fs->ejected = 1;
> > +
> > + return 0;
> > +}
> > +
> > +static inline int swim_read_sector(struct floppy_state *fs,
> > + int side, int track,
> > + int sector, unsigned char *buffer)
> > +{
> > + struct swim __iomem *base = fs->swd->base;
> > + unsigned long flags;
> > + struct sector_header header;
> > + int ret = -1;
> > + short i;
> > +
> > + swim_track(fs, track);
> > +
> > + swim_write(base, mode1, MOTON);
> > + swim_head(base, side);
> > + swim_write(base, mode0, side);
> > +
> > + local_irq_save(flags);
> > + for (i = 0; i < 36; i++) {
> > + ret = swim_read_sector_header(base, &header);
> > + if (!ret && (header.sector == sector)) {
> > + /* found */
> > +
> > + ret = swim_read_sector_data(base, buffer);
> > + break;
> > + }
> > + }
> > + local_irq_restore(flags);
> > +
> > + swim_write(base, mode0, MOTON);
> > +
> > + if ((header.side != side) || (header.track != track) ||
> > + (header.sector != sector))
> > + return 0;
> > +
> > + return ret;
> > +}
> > +
> > +static int floppy_read_sectors(struct floppy_state *fs,
> > + int req_sector, int sectors_nb,
> > + unsigned char *buffer)
> > +{
> > + struct swim __iomem *base = fs->swd->base;
> > + int ret;
> > + int side, track, sector;
> > + int i, try;
> > +
> > +
> > + swim_drive(base, fs->location);
> > + for (i = req_sector; i < req_sector + sectors_nb; i++) {
> > + int x;
> > + track = i / fs->secpercyl;
> > + x = i % fs->secpercyl;
> > + side = x / fs->secpertrack;
> > + sector = x % fs->secpertrack + 1;
> > +
> > + try = 5;
> > + do {
> > + ret = swim_read_sector(fs, side, track, sector,
> > + buffer);
> > + if (try-- == 0)
> > + return -1;
> > + } while (ret != 512);
> > +
> > + buffer += ret;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static void redo_fd_request(struct request_queue *q)
> > +{
> > + struct request *req;
> > + struct floppy_state *fs;
> > +
> > + while ((req = elv_next_request(q))) {
> > +
> > + fs = req->rq_disk->private_data;
> > + if (req->sector < 0 || req->sector >= fs->total_secs) {
> > + end_request(req, 0);
> > + continue;
> > + }
> > + if (req->current_nr_sectors == 0) {
> > + end_request(req, 1);
> > + continue;
> > + }
> > + if (!fs->disk_in) {
> > + end_request(req, 0);
> > + continue;
> > + }
> > + if (rq_data_dir(req) == WRITE) {
> > + if (fs->write_protected) {
> > + end_request(req, 0);
> > + continue;
> > + }
> > + }
> > + switch (rq_data_dir(req)) {
> > + case WRITE:
> > + /* NOT IMPLEMENTED */
> > + end_request(req, 0);
> > + break;
> > + case READ:
> > + if (floppy_read_sectors(fs, req->sector,
> > + req->current_nr_sectors,
> > + req->buffer)) {
> > + end_request(req, 0);
> > + continue;
> > + }
> > + req->nr_sectors -= req->current_nr_sectors;
> > + req->sector += req->current_nr_sectors;
> > + req->buffer += req->current_nr_sectors * 512;
> > + end_request(req, 1);
> > + break;
> > + }
> > + }
> > +}
> > +
> > +static void do_fd_request(struct request_queue *q)
> > +{
> > + redo_fd_request(q);
> > +}
> > +
> > +static struct floppy_struct floppy_type[4] = {
> > + { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */
> > + { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/
> > + { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */
> > + { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */
> > +};
> > +
> > +static int get_floppy_geometry(struct floppy_state *fs, int type,
> > + struct floppy_struct **g)
> > +{
> > + if (type >= ARRAY_SIZE(floppy_type))
> > + return -EINVAL;
> > +
> > + if (type)
> > + *g = &floppy_type[type];
> > + else if (fs->type == HD_MEDIA) /* High-Density media */
> > + *g = &floppy_type[3];
> > + else if (fs->head_number == 2) /* double-sided */
> > + *g = &floppy_type[2];
> > + else
> > + *g = &floppy_type[1];
> > +
> > + return 0;
> > +}
> > +
> > +static void setup_medium(struct floppy_state *fs)
> > +{
> > + struct swim __iomem *base = fs->swd->base;
> > +
> > + if (swim_readbit(base, DISK_IN)) {
> > + struct floppy_struct *g;
> > + fs->disk_in = 1;
> > + fs->write_protected = swim_readbit(base, WRITE_PROT);
> > + fs->type = swim_readbit(base, ONEMEG_MEDIA);
> > +
> > + if (swim_track00(base))
> > + printk(KERN_ERR
> > + "SWIM: cannot move floppy head to track 0\n");
> > +
> > + swim_track00(base);
> > +
> > + get_floppy_geometry(fs, 0, &g);
> > + fs->total_secs = g->size;
> > + fs->secpercyl = g->head * g->sect;
> > + fs->secpertrack = g->sect;
> > + fs->track = 0;
> > + } else {
> > + fs->disk_in = 0;
> > + }
> > +}
> > +
> > +static int floppy_open(struct block_device *bdev, fmode_t mode)
> > +{
> > + struct floppy_state *fs = bdev->bd_disk->private_data;
> > + struct swim __iomem *base = fs->swd->base;
> > + int err;
> > +
> > + if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
> > + return -EBUSY;
> > +
> > + if (mode & FMODE_EXCL)
> > + fs->ref_count = -1;
> > + else
> > + fs->ref_count++;
> > +
> > + swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2);
> > + udelay(10);
> > + swim_drive(base, INTERNAL_DRIVE);
> > + swim_motor(base, ON);
> > + swim_action(base, SETMFM);
> > + if (fs->ejected)
> > + setup_medium(fs);
> > + if (!fs->disk_in) {
> > + err = -ENXIO;
> > + goto out;
> > + }
> > +
> > + if (mode & FMODE_NDELAY)
> > + return 0;
> > +
> > + if (mode & (FMODE_READ|FMODE_WRITE)) {
> > + check_disk_change(bdev);
> > + if ((mode & FMODE_WRITE) && fs->write_protected) {
> > + err = -EROFS;
> > + goto out;
> > + }
> > + }
> > + return 0;
> > +out:
> > + if (fs->ref_count < 0)
> > + fs->ref_count = 0;
> > + else if (fs->ref_count > 0)
> > + --fs->ref_count;
> > +
> > + if (fs->ref_count == 0)
> > + swim_motor(base, OFF);
> > + return err;
> > +}
> > +
> > +static int floppy_release(struct gendisk *disk, fmode_t mode)
> > +{
> > + struct floppy_state *fs = disk->private_data;
> > + struct swim __iomem *base = fs->swd->base;
> > +
> > + if (fs->ref_count < 0)
> > + fs->ref_count = 0;
> > + else if (fs->ref_count > 0)
> > + --fs->ref_count;
> > +
> > + if (fs->ref_count == 0)
> > + swim_motor(base, OFF);
> > +
> > + return 0;
> > +}
> > +
> > +static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
> > + unsigned int cmd, unsigned long param)
> > +{
> > + struct floppy_state *fs = bdev->bd_disk->private_data;
> > + int err;
> > +
> > + if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
> > + return -EPERM;
> > +
> > + switch (cmd) {
> > + case FDEJECT:
> > + if (fs->ref_count != 1)
> > + return -EBUSY;
> > + err = floppy_eject(fs);
> > + return err;
> > +
> > + case FDGETPRM:
> > + if (copy_to_user((void __user *) param, (void *) &floppy_type,
> > + sizeof(struct floppy_struct)))
> > + return -EFAULT;
> > + break;
> > +
> > + default:
> > + printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n",
> > + cmd);
> > + return -ENOSYS;
> > + }
> > + return 0;
> > +}
> > +
> > +static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
> > +{
> > + struct floppy_state *fs = bdev->bd_disk->private_data;
> > + struct floppy_struct *g;
> > + int ret;
> > +
> > + ret = get_floppy_geometry(fs, 0, &g);
> > + if (ret)
> > + return ret;
> > +
> > + geo->heads = g->head;
> > + geo->sectors = g->sect;
> > + geo->cylinders = g->track;
> > +
> > + return 0;
> > +}
> > +
> > +static int floppy_check_change(struct gendisk *disk)
> > +{
> > + struct floppy_state *fs = disk->private_data;
> > +
> > + return fs->ejected;
> > +}
> > +
> > +static int floppy_revalidate(struct gendisk *disk)
> > +{
> > + struct floppy_state *fs = disk->private_data;
> > + struct swim __iomem *base = fs->swd->base;
> > +
> > + swim_drive(base, fs->location);
> > +
> > + if (fs->ejected)
> > + setup_medium(fs);
> > +
> > + if (!fs->disk_in)
> > + swim_motor(base, OFF);
> > + else
> > + fs->ejected = 0;
> > +
> > + return !fs->disk_in;
> > +}
> > +
> > +static struct block_device_operations floppy_fops = {
> > + .owner = THIS_MODULE,
> > + .open = floppy_open,
> > + .release = floppy_release,
> > + .locked_ioctl = floppy_ioctl,
> > + .getgeo = floppy_getgeo,
> > + .media_changed = floppy_check_change,
> > + .revalidate_disk = floppy_revalidate,
> > +};
> > +
> > +static struct kobject *floppy_find(dev_t dev, int *part, void *data)
> > +{
> > + struct swim_priv *swd = data;
> > + int drive = (*part & 3);
> > +
> > + if (drive > swd->floppy_count)
> > + return NULL;
> > +
> > + *part = 0;
> > + return get_disk(swd->unit[drive].disk);
> > +}
> > +
> > +static int __devinit swim_add_floppy(struct swim_priv *swd,
> > + enum drive_location location)
> > +{
> > + struct floppy_state *fs = &swd->unit[swd->floppy_count];
> > + struct swim __iomem *base = swd->base;
> > +
> > + fs->location = location;
> > +
> > + swim_drive(base, location);
> > +
> > + swim_motor(base, OFF);
> > +
> > + if (swim_readbit(base, SINGLE_SIDED))
> > + fs->head_number = 1;
> > + else
> > + fs->head_number = 2;
> > + fs->ref_count = 0;
> > + fs->ejected = 1;
> > +
> > + swd->floppy_count++;
> > +
> > + return 0;
> > +}
> > +
> > +static int __devinit swim_floppy_init(struct swim_priv *swd)
> > +{
> > + int err;
> > + int drive;
> > + struct swim __iomem *base = swd->base;
> > +
> > + /* scan floppy drives */
> > +
> > + swim_drive(base, INTERNAL_DRIVE);
> > + if (swim_readbit(base, DRIVE_PRESENT))
> > + swim_add_floppy(swd, INTERNAL_DRIVE);
> > + swim_drive(base, EXTERNAL_DRIVE);
> > + if (swim_readbit(base, DRIVE_PRESENT))
> > + swim_add_floppy(swd, EXTERNAL_DRIVE);
> > +
> > + /* register floppy drives */
> > +
> > + err = register_blkdev(FLOPPY_MAJOR, "fd");
> > + if (err) {
> > + printk(KERN_ERR "Unable to get major %d for SWIM floppy\n",
> > + FLOPPY_MAJOR);
> > + return -EBUSY;
> > + }
> > +
> > + for (drive = 0; drive < swd->floppy_count; drive++) {
> > + swd->unit[drive].disk = alloc_disk(1);
> > + if (swd->unit[drive].disk == NULL) {
> > + err = -ENOMEM;
> > + goto exit_put_disks;
> > + }
> > + swd->unit[drive].swd = swd;
> > + }
> > +
> > + swd->queue = blk_init_queue(do_fd_request, &swd->lock);
> > + if (!swd->queue) {
> > + err = -ENOMEM;
> > + goto exit_put_disks;
> > + }
> > +
> > + for (drive = 0; drive < swd->floppy_count; drive++) {
> > + swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE;
> > + swd->unit[drive].disk->major = FLOPPY_MAJOR;
> > + swd->unit[drive].disk->first_minor = drive;
> > + sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive);
> > + swd->unit[drive].disk->fops = &floppy_fops;
> > + swd->unit[drive].disk->private_data = &swd->unit[drive];
> > + swd->unit[drive].disk->queue = swd->queue;
> > + set_capacity(swd->unit[drive].disk, 2880);
> > + add_disk(swd->unit[drive].disk);
> > + }
> > +
> > + blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
> > + floppy_find, NULL, swd);
> > +
> > + return 0;
> > +
> > +exit_put_disks:
> > + unregister_blkdev(FLOPPY_MAJOR, "fd");
> > + while (drive--)
> > + put_disk(swd->unit[drive].disk);
> > + return err;
> > +}
> > +
> > +static int __devinit swim_probe(struct platform_device *dev)
> > +{
> > + struct resource *res;
> > + struct swim __iomem *swim_base;
> > + struct swim_priv *swd;
> > + int ret;
> > +
> > + res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs");
> > + if (!res) {
> > + ret = -ENODEV;
> > + goto out;
> > + }
> > +
> > + if (!request_mem_region(res->start, resource_size(res), CARDNAME)) {
> > + ret = -EBUSY;
> > + goto out;
> > + }
> > +
> > + swim_base = ioremap(res->start, resource_size(res));
> > + if (!swim_base) {
> > + return -ENOMEM;
> > + goto out_release_io;
> > + }
> > +
> > + /* probe device */
> > +
> > + set_swim_mode(swim_base, 1);
> > + if (!get_swim_mode(swim_base)) {
> > + printk(KERN_INFO "SWIM device not found !\n");
> > + ret = -ENODEV;
> > + goto out_iounmap;
> > + }
> > +
> > + /* set platform driver data */
> > +
> > + swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL);
> > + if (!swd) {
> > + ret = -ENOMEM;
> > + goto out_iounmap;
> > + }
> > + platform_set_drvdata(dev, swd);
> > +
> > + swd->base = swim_base;
> > +
> > + ret = swim_floppy_init(swd);
> > + if (ret)
> > + goto out_kfree;
> > +
> > + return 0;
> > +
> > +out_kfree:
> > + platform_set_drvdata(dev, NULL);
> > + kfree(swd);
> > +out_iounmap:
> > + iounmap(swim_base);
> > +out_release_io:
> > + release_mem_region(res->start, resource_size(res));
> > +out:
> > + return ret;
> > +}
> > +
> > +static int __devexit swim_remove(struct platform_device *dev)
> > +{
> > + struct swim_priv *swd = platform_get_drvdata(dev);
> > + int drive;
> > + struct resource *res;
> > +
> > + blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
> > +
> > + for (drive = 0; drive < swd->floppy_count; drive++) {
> > + del_gendisk(swd->unit[drive].disk);
> > + put_disk(swd->unit[drive].disk);
> > + }
> > +
> > + unregister_blkdev(FLOPPY_MAJOR, "fd");
> > +
> > + blk_cleanup_queue(swd->queue);
> > +
> > + /* eject floppies */
> > +
> > + for (drive = 0; drive < swd->floppy_count; drive++)
> > + floppy_eject(&swd->unit[drive]);
> > +
> > + iounmap(swd->base);
> > +
> > + res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs");
> > + if (res)
> > + release_mem_region(res->start, resource_size(res));
> > +
> > + platform_set_drvdata(dev, NULL);
> > + kfree(swd);
> > +
> > + return 0;
> > +}
> > +
> > +static struct platform_driver swim_driver = {
> > + .probe = swim_probe,
> > + .remove = __devexit_p(swim_remove),
> > + .driver = {
> > + .name = CARDNAME,
> > + .owner = THIS_MODULE,
> > + },
> > +};
> > +
> > +static int __init swim_init(void)
> > +{
> > + printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION);
> > +
> > + return platform_driver_register(&swim_driver);
> > +}
> > +module_init(swim_init);
> > +
> > +static void __exit swim_exit(void)
> > +{
> > + platform_driver_unregister(&swim_driver);
> > +}
> > +module_exit(swim_exit);
> > +
> > +MODULE_DESCRIPTION("Driver for SWIM floppy controller");
> > +MODULE_LICENSE("GPL");
> > +MODULE_AUTHOR("Laurent Vivier <laurent@...vier.info>");
> > +MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
> > diff --git a/drivers/block/swim_asm.S b/drivers/block/swim_asm.S
> > new file mode 100644
> > index 0000000..c966820
> > --- /dev/null
> > +++ b/drivers/block/swim_asm.S
> > @@ -0,0 +1,247 @@
> > +/*
> > + * low-level functions for the SWIM floppy controller
> > + *
> > + * needs assembly language because is very timing dependent
> > + * this controller exists only on macintosh 680x0 based
> > + *
> > + * Copyright (C) 2004,2008 Laurent Vivier <Laurent@...vier.info>
> > + *
> > + * based on Alastair Bridgewater SWIM analysis, 2001
> > + * 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
> > + * 2008-11-05 (lv) - add get_swim_mode
> > + */
> > +
> > + .equ write_data, 0x0000
> > + .equ write_mark, 0x0200
> > + .equ write_CRC, 0x0400
> > + .equ write_parameter,0x0600
> > + .equ write_phase, 0x0800
> > + .equ write_setup, 0x0a00
> > + .equ write_mode0, 0x0c00
> > + .equ write_mode1, 0x0e00
> > + .equ read_data, 0x1000
> > + .equ read_mark, 0x1200
> > + .equ read_error, 0x1400
> > + .equ read_parameter, 0x1600
> > + .equ read_phase, 0x1800
> > + .equ read_setup, 0x1a00
> > + .equ read_status, 0x1c00
> > + .equ read_handshake, 0x1e00
> > +
> > + .equ o_side, 0
> > + .equ o_track, 1
> > + .equ o_sector, 2
> > + .equ o_size, 3
> > + .equ o_crc0, 4
> > + .equ o_crc1, 5
> > +
> > + .equ seek_time, 30000
> > + .equ max_retry, 40
> > + .equ sector_size, 512
> > +
> > + .global swim_read_sector_header
> > +swim_read_sector_header:
> > + link %a6, #0
> > + moveml %d1-%d5/%a0-%a4,%sp@-
> > + movel %a6@(0x0c), %a4
> > + bsr mfm_read_addrmark
> > + moveml %sp@+, %d1-%d5/%a0-%a4
> > + unlk %a6
> > + rts
> > +
> > +sector_address_mark:
> > + .byte 0xa1, 0xa1, 0xa1, 0xfe
> > +sector_data_mark:
> > + .byte 0xa1, 0xa1, 0xa1, 0xfb
> > +
> > +mfm_read_addrmark:
> > + movel %a6@(0x08), %a3
> > + lea %a3@(read_handshake), %a2
> > + lea %a3@(read_mark), %a3
> > + moveq #-1, %d0
> > + movew #seek_time, %d2
> > +
> > +wait_header_init:
> > + tstb %a3@(read_error - read_mark)
> > + moveb #0x18, %a3@(write_mode0 - read_mark)
> > + moveb #0x01, %a3@(write_mode1 - read_mark)
> > + moveb #0x01, %a3@(write_mode0 - read_mark)
> > + tstb %a3@(read_error - read_mark)
> > + moveb #0x08, %a3@(write_mode1 - read_mark)
> > +
> > + lea sector_address_mark, %a0
> > + moveq #3, %d1
> > +
> > +wait_addr_mark_byte:
> > +
> > + tstb %a2@
> > + dbmi %d2, wait_addr_mark_byte
> > + bpl header_exit
> > +
> > + moveb %a3@, %d3
> > + cmpb %a0@+, %d3
> > + dbne %d1, wait_addr_mark_byte
> > + bne wait_header_init
> > +
> > + moveq #max_retry, %d2
> > +
> > +amark0: tstb %a2@
> > + dbmi %d2, amark0
> > + bpl signal_nonyb
> > +
> > + moveb %a3@, %a4@(o_track)
> > +
> > + moveq #max_retry, %d2
> > +
> > +amark1: tstb %a2@
> > + dbmi %d2, amark1
> > + bpl signal_nonyb
> > +
> > + moveb %a3@, %a4@(o_side)
> > +
> > + moveq #max_retry, %d2
> > +
> > +amark2: tstb %a2@
> > + dbmi %d2, amark2
> > + bpl signal_nonyb
> > +
> > + moveb %a3@, %a4@(o_sector)
> > +
> > + moveq #max_retry, %d2
> > +
> > +amark3: tstb %a2@
> > + dbmi %d2, amark3
> > + bpl signal_nonyb
> > +
> > + moveb %a3@, %a4@(o_size)
> > +
> > + moveq #max_retry, %d2
> > +
> > +crc0: tstb %a2@
> > + dbmi %d2, crc0
> > + bpl signal_nonyb
> > +
> > + moveb %a3@, %a4@(o_crc0)
> > +
> > + moveq #max_retry, %d2
> > +
> > +crc1: tstb %a2@
> > + dbmi %d2, crc1
> > + bpl signal_nonyb
> > +
> > + moveb %a3@, %a4@(o_crc1)
> > +
> > + tstb %a3@(read_error - read_mark)
> > +
> > +header_exit:
> > + moveq #0, %d0
> > + moveb #0x18, %a3@(write_mode0 - read_mark)
> > + rts
> > +signal_nonyb:
> > + moveq #-1, %d0
> > + moveb #0x18, %a3@(write_mode0 - read_mark)
> > + rts
> > +
> > + .global swim_read_sector_data
> > +swim_read_sector_data:
> > + link %a6, #0
> > + moveml %d1-%d5/%a0-%a5,%sp@-
> > + movel %a6@(0x0c), %a4
> > + bsr mfm_read_data
> > + moveml %sp@+, %d1-%d5/%a0-%a5
> > + unlk %a6
> > + rts
> > +
> > +mfm_read_data:
> > + movel %a6@(0x08), %a3
> > + lea %a3@(read_handshake), %a2
> > + lea %a3@(read_data), %a5
> > + lea %a3@(read_mark), %a3
> > + movew #seek_time, %d2
> > +
> > +wait_data_init:
> > + tstb %a3@(read_error - read_mark)
> > + moveb #0x18, %a3@(write_mode0 - read_mark)
> > + moveb #0x01, %a3@(write_mode1 - read_mark)
> > + moveb #0x01, %a3@(write_mode0 - read_mark)
> > + tstb %a3@(read_error - read_mark)
> > + moveb #0x08, %a3@(write_mode1 - read_mark)
> > +
> > + lea sector_data_mark, %a0
> > + moveq #3, %d1
> > +
> > + /* wait data address mark */
> > +
> > +wait_data_mark_byte:
> > +
> > + tstb %a2@
> > + dbmi %d2, wait_data_mark_byte
> > + bpl data_exit
> > +
> > + moveb %a3@, %d3
> > + cmpb %a0@+, %d3
> > + dbne %d1, wait_data_mark_byte
> > + bne wait_data_init
> > +
> > + /* read data */
> > +
> > + tstb %a3@(read_error - read_mark)
> > +
> > + movel #sector_size-1, %d4 /* sector size */
> > +read_new_data:
> > + movew #max_retry, %d2
> > +read_data_loop:
> > + moveb %a2@, %d5
> > + andb #0xc0, %d5
> > + dbne %d2, read_data_loop
> > + beq data_exit
> > + moveb %a5@, %a4@+
> > + andb #0x40, %d5
> > + dbne %d4, read_new_data
> > + beq exit_loop
> > + moveb %a5@, %a4@+
> > + dbra %d4, read_new_data
> > +exit_loop:
> > +
> > + /* read CRC */
> > +
> > + movew #max_retry, %d2
> > +data_crc0:
> > +
> > + tstb %a2@
> > + dbmi %d2, data_crc0
> > + bpl data_exit
> > +
> > + moveb %a3@, %d5
> > +
> > + moveq #max_retry, %d2
> > +
> > +data_crc1:
> > +
> > + tstb %a2@
> > + dbmi %d2, data_crc1
> > + bpl data_exit
> > +
> > + moveb %a3@, %d5
> > +
> > + tstb %a3@(read_error - read_mark)
> > +
> > + moveb #0x18, %a3@(write_mode0 - read_mark)
> > +
> > + /* return number of bytes read */
> > +
> > + movel #sector_size, %d0
> > + addw #1, %d4
> > + subl %d4, %d0
> > + rts
> > +data_exit:
> > + moveb #0x18, %a3@(write_mode0 - read_mark)
> > + moveq #-1, %d0
> > + rts
> > --
> > 1.6.1.3
> >
> >
>
>
>
> --
> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
> -- Linus Torvalds
--
Jens Axboe
--
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