m68k: mac - Add SWIM floppy support
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@lvivier.info> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Laurent Vivier
Geert Uytterhoeven
parent
7ad93b42bd
commit
8852ecd974
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@ -22,6 +22,7 @@
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/* keyb */
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#include <linux/init.h>
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#include <linux/vt_kern.h>
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#include <linux/platform_device.h>
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#define BOOTINFO_COMPAT_1_0
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#include <asm/setup.h>
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@ -43,6 +44,10 @@
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#include <asm/mac_oss.h>
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#include <asm/mac_psc.h>
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/* platform device info */
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#define SWIM_IO_SIZE 0x2000 /* SWIM IO resource size */
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/* Mac bootinfo struct */
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struct mac_booter_data mac_bi_data;
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@ -870,3 +875,42 @@ static void mac_get_model(char *str)
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strcpy(str, "Macintosh ");
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strcat(str, macintosh_config->name);
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}
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static struct resource swim_resources[1];
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static struct platform_device swim_device = {
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.name = "swim",
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.id = -1,
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.num_resources = ARRAY_SIZE(swim_resources),
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.resource = swim_resources,
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};
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static struct platform_device *mac_platform_devices[] __initdata = {
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&swim_device
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};
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int __init mac_platform_init(void)
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{
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u8 *swim_base;
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switch (macintosh_config->floppy_type) {
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case MAC_FLOPPY_SWIM_ADDR1:
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swim_base = (u8 *)(VIA1_BASE + 0x1E000);
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break;
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case MAC_FLOPPY_SWIM_ADDR2:
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swim_base = (u8 *)(VIA1_BASE + 0x16000);
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break;
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default:
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return 0;
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}
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swim_resources[0].name = "swim-regs";
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swim_resources[0].start = (resource_size_t)swim_base;
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swim_resources[0].end = (resource_size_t)(swim_base + SWIM_IO_SIZE);
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swim_resources[0].flags = IORESOURCE_MEM;
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return platform_add_devices(mac_platform_devices,
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ARRAY_SIZE(mac_platform_devices));
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}
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arch_initcall(mac_platform_init);
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@ -645,3 +645,12 @@ int via_irq_pending(int irq)
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}
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return 0;
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}
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void via1_set_head(int head)
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{
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if (head == 0)
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via1[vBufA] &= ~VIA1A_vHeadSel;
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else
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via1[vBufA] |= VIA1A_vHeadSel;
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}
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EXPORT_SYMBOL(via1_set_head);
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@ -45,6 +45,13 @@ config MAC_FLOPPY
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If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
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floppy controller, say Y here. Most commonly found in PowerMacs.
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config BLK_DEV_SWIM
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tristate "Support for SWIM Macintosh floppy"
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depends on M68K && MAC
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help
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You should select this option if you want floppy support
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and you don't have a II, IIfx, Q900, Q950 or AV series.
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config AMIGA_Z2RAM
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tristate "Amiga Zorro II ramdisk support"
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depends on ZORRO
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@ -6,6 +6,7 @@
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#
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obj-$(CONFIG_MAC_FLOPPY) += swim3.o
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obj-$(CONFIG_BLK_DEV_SWIM) += swim_mod.o
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obj-$(CONFIG_BLK_DEV_FD) += floppy.o
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obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
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obj-$(CONFIG_PS3_DISK) += ps3disk.o
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@ -33,3 +34,5 @@ obj-$(CONFIG_BLK_DEV_UB) += ub.o
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obj-$(CONFIG_BLK_DEV_HD) += hd.o
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obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
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swim_mod-objs := swim.o swim_asm.o
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@ -0,0 +1,995 @@
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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 <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/blkdev.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;
|
||||
}
|
||||
|
||||
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@lvivier.info>");
|
||||
MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
|
||||
|
|
@ -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@lvivier.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
|
||||
Loading…
Reference in New Issue