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phoenix |
/*
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*
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Copyright (C) 1993,1994 Jon Tombs.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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The entire guts of this program was written by dosemu, modified to
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record reads and writes to the ports in the 0x180-0x188 address space,
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while running the CMS program TAPE.EXE V2.0.5 supplied with the drive.
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Modified to use an array of addresses and generally cleaned up (made
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much shorter) 4 June 94, dosemu isn't that good at writing short code it
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would seem :-). Made independent of 0x180, but I doubt it will work
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at any other address.
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Modified for distribution with ftape source. 21 June 94, SJL.
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Modifications on 20 October 95, by Daniel Cohen (catman@wpi.edu):
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Modified to support different DMA, IRQ, and IO Ports. Borland's
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Turbo Debugger in virtual 8086 mode (TD386.EXE with hardware breakpoints
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provided by the TDH386.SYS Device Driver) was used on the CMS program
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TAPE V4.0.5. I set breakpoints on I/O to ports 0x180-0x187. Note that
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CMS's program will not successfully configure the tape drive if you set
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breakpoints on IO Reads, but you can set them on IO Writes without problems.
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Known problems:
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- You can not use DMA Channels 5 or 7.
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Modification on 29 January 96, by Daniel Cohen (catman@wpi.edu):
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Modified to only accept IRQs 3 - 7, or 9. Since we can only send a 3 bit
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number representing the IRQ to the card, special handling is required when
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IRQ 9 is selected. IRQ 2 and 9 are the same, and we should request IRQ 9
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from the kernel while telling the card to use IRQ 2. Thanks to Greg
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Crider (gcrider@iclnet.org) for finding and locating this bug, as well as
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testing the patch.
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Modification on 11 December 96, by Claus Heine (claus@momo.math.rwth-aachen.de):
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Modified a little to use variahle ft_fdc_base, ft_fdc_irq, ft_fdc_dma
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instead of preprocessor symbols. Thus we can compile this into the module
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or kernel and let the user specify the options as command line arguments.
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*
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* $Source: /home/marcus/revision_ctrl_test/oc_cvs/cvs/or1k/linux/linux-2.4/drivers/char/ftape/lowlevel/fc-10.c,v $
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* $Revision: 1.1.1.1 $
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* $Date: 2004-04-15 02:02:34 $
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*
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* This file contains code for the CMS FC-10/FC-20 card.
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*/
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#include <asm/io.h>
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#include <linux/ftape.h>
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#include "../lowlevel/ftape-tracing.h"
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#include "../lowlevel/fdc-io.h"
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#include "../lowlevel/fc-10.h"
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__u16 inbs_magic[] = {
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0x3, 0x3, 0x0, 0x4, 0x7, 0x2, 0x5, 0x3, 0x1, 0x4,
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0x3, 0x5, 0x2, 0x0, 0x3, 0x7, 0x4, 0x2,
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0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
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};
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__u16 fc10_ports[] = {
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0x180, 0x210, 0x2A0, 0x300, 0x330, 0x340, 0x370
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};
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int fc10_enable(void)
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{
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int i;
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__u8 cardConfig = 0x00;
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__u8 x;
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TRACE_FUN(ft_t_flow);
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/* This code will only work if the FC-10 (or FC-20) is set to
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* use DMA channels 1, 2, or 3. DMA channels 5 and 7 seem to be
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* initialized by the same command as channels 1 and 3, respectively.
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*/
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if (ft_fdc_dma > 3) {
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TRACE_ABORT(0, ft_t_err,
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"Error: The FC-10/20 must be set to use DMA channels 1, 2, or 3!");
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}
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/* Only allow the FC-10/20 to use IRQ 3-7, or 9. Note that CMS's program
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* only accepts IRQ's 2-7, but in linux, IRQ 2 is the same as IRQ 9.
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*/
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if (ft_fdc_irq < 3 || ft_fdc_irq == 8 || ft_fdc_irq > 9) {
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TRACE_ABORT(0, ft_t_err,
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"Error: The FC-10/20 must be set to use IRQ levels 3 - 7, or 9!\n"
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KERN_INFO "Note: IRQ 9 is the same as IRQ 2");
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}
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/* Clear state machine ???
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*/
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for (i = 0; i < NR_ITEMS(inbs_magic); i++) {
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inb(ft_fdc_base + inbs_magic[i]);
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}
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outb(0x0, ft_fdc_base);
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x = inb(ft_fdc_base);
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if (x == 0x13 || x == 0x93) {
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for (i = 1; i < 8; i++) {
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if (inb(ft_fdc_base + i) != x) {
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TRACE_EXIT 0;
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}
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}
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} else {
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TRACE_EXIT 0;
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}
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outb(0x8, ft_fdc_base);
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for (i = 0; i < 8; i++) {
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if (inb(ft_fdc_base + i) != 0x0) {
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TRACE_EXIT 0;
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}
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}
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outb(0x10, ft_fdc_base);
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for (i = 0; i < 8; i++) {
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if (inb(ft_fdc_base + i) != 0xff) {
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TRACE_EXIT 0;
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}
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}
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/* Okay, we found a FC-10 card ! ???
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*/
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outb(0x0, fdc.ccr);
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/* Clear state machine again ???
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*/
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for (i = 0; i < NR_ITEMS(inbs_magic); i++) {
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inb(ft_fdc_base + inbs_magic[i]);
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}
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/* Send io port */
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for (i = 0; i < NR_ITEMS(fc10_ports); i++)
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if (ft_fdc_base == fc10_ports[i])
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cardConfig = i + 1;
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if (cardConfig == 0) {
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TRACE_EXIT 0; /* Invalid I/O Port */
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}
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/* and IRQ - If using IRQ 9, tell the FC card it is actually IRQ 2 */
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if (ft_fdc_irq != 9)
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cardConfig |= ft_fdc_irq << 3;
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else
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cardConfig |= 2 << 3;
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/* and finally DMA Channel */
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cardConfig |= ft_fdc_dma << 6;
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outb(cardConfig, ft_fdc_base); /* DMA [2 bits]/IRQ [3 bits]/BASE [3 bits] */
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/* Enable FC-10 ???
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*/
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outb(0, fdc.ccr);
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outb(0, fdc.dor2);
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outb(FDC_DMA_MODE /* 8 */, fdc.dor);
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outb(FDC_DMA_MODE /* 8 */, fdc.dor);
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outb(1, fdc.dor2);
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/*************************************
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*
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* cH: why the hell should this be necessary? This is done
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* by fdc_reset()!!!
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*
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*************************************/
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/* Initialize fdc, select drive B:
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*/
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outb(FDC_DMA_MODE, fdc.dor); /* assert reset, dma & irq enabled */
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/* 0x08 */
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outb(FDC_DMA_MODE|FDC_RESET_NOT, fdc.dor); /* release reset */
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/* 0x08 | 0x04 = 0x0c */
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outb(FDC_DMA_MODE|FDC_RESET_NOT|FDC_MOTOR_1|FTAPE_SEL_B, fdc.dor);
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/* 0x08 | 0x04 | 0x20 | 0x01 = 0x2d */
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/* select drive 1 */ /* why not drive 0 ???? */
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TRACE_EXIT (x == 0x93) ? 2 : 1;
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}
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