linux/drivers/scsi/imm.h
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   2/*  Driver for the Iomega MatchMaker parallel port SCSI HBA embedded in 
   3 * the Iomega ZIP Plus drive
   4 * 
   5 * (c) 1998     David Campbell
   6 *
   7 * Please note that I live in Perth, Western Australia. GMT+0800
   8 */
   9
  10#ifndef _IMM_H
  11#define _IMM_H
  12
  13#define   IMM_VERSION   "2.05 (for Linux 2.4.0)"
  14
  15/* 
  16 * 10 Apr 1998 (Good Friday) - Received EN144302 by email from Iomega.
  17 * Scarry thing is the level of support from one of their managers.
  18 * The onus is now on us (the developers) to shut up and start coding.
  19 *                                              11Apr98 [ 0.10 ]
  20 *
  21 * --- SNIP ---
  22 *
  23 * It manages to find the drive which is a good start. Writing data during
  24 * data phase is known to be broken (due to requirements of two byte writes).
  25 * Removing "Phase" debug messages.
  26 *
  27 * PS: Took four hours of coding after I bought a drive.
  28 *      ANZAC Day (Aus "War Veterans Holiday")  25Apr98 [ 0.14 ]
  29 *
  30 * Ten minutes later after a few fixes.... (LITERALLY!!!)
  31 * Have mounted disk, copied file, dismounted disk, remount disk, diff file
  32 *                    -----  It actually works!!! -----
  33 *                                              25Apr98 [ 0.15 ]
  34 *
  35 * Twenty minutes of mucking around, rearanged the IEEE negotiate mechanism.
  36 * Now have byte mode working (only EPP and ECP to go now... :=)
  37 *                                              26Apr98 [ 0.16 ]
  38 *
  39 * Thirty minutes of further coding results in EPP working on my machine.
  40 *                                              27Apr98 [ 0.17 ]
  41 *
  42 * Due to work commitments and inability to get a "true" ECP mode functioning
  43 * I have decided to code the parport support into imm.
  44 *                                              09Jun98 [ 0.18 ]
  45 *
  46 * Driver is now out of beta testing.
  47 * Support for parport has been added.
  48 * Now distributed with the ppa driver.
  49 *                                              12Jun98 [ 2.00 ]
  50 *
  51 * Err.. It appears that imm-2.00 was broken....
  52 *                                              18Jun98 [ 2.01 ]
  53 *
  54 * Patch applied to sync this against the Linux 2.1.x kernel code
  55 * Included qboot_zip.sh
  56 *                                              21Jun98 [ 2.02 ]
  57 *
  58 * Other clean ups include the follow changes:
  59 *    CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16
  60 *    added CONFIG_SCSI_IZIP_SLOW_CTR option
  61 *                                                      [2.03]
  62 *  Fix kernel panic on scsi timeout.           20Aug00 [2.04]
  63 *
  64 *  Avoid io_request_lock problems.
  65 *  John Cavan <johncavan@home.com>             16Nov00 [2.05]
  66 */
  67/* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
  68
  69#include  <linux/stddef.h>
  70#include  <linux/module.h>
  71#include  <linux/kernel.h>
  72#include  <linux/ioport.h>
  73#include  <linux/delay.h>
  74#include  <linux/proc_fs.h>
  75#include  <linux/stat.h>
  76#include  <linux/blkdev.h>
  77#include  <linux/sched.h>
  78#include  <linux/interrupt.h>
  79
  80#include  <asm/io.h>
  81#include  <scsi/scsi_host.h>
  82/* batteries not included :-) */
  83
  84/*
  85 * modes in which the driver can operate 
  86 */
  87#define   IMM_AUTODETECT        0       /* Autodetect mode                */
  88#define   IMM_NIBBLE            1       /* work in standard 4 bit mode    */
  89#define   IMM_PS2               2       /* PS/2 byte mode         */
  90#define   IMM_EPP_8             3       /* EPP mode, 8 bit                */
  91#define   IMM_EPP_16            4       /* EPP mode, 16 bit               */
  92#define   IMM_EPP_32            5       /* EPP mode, 32 bit               */
  93#define   IMM_UNKNOWN           6       /* Just in case...                */
  94
  95static char *IMM_MODE_STRING[] =
  96{
  97        [IMM_AUTODETECT] = "Autodetect",
  98        [IMM_NIBBLE]     = "SPP",
  99        [IMM_PS2]        = "PS/2",
 100        [IMM_EPP_8]      = "EPP 8 bit",
 101        [IMM_EPP_16]     = "EPP 16 bit",
 102#ifdef CONFIG_SCSI_IZIP_EPP16
 103        [IMM_EPP_32]     = "EPP 16 bit",
 104#else
 105        [IMM_EPP_32]     = "EPP 32 bit",
 106#endif
 107        [IMM_UNKNOWN]    = "Unknown",
 108};
 109
 110/* other options */
 111#define IMM_BURST_SIZE  512     /* data burst size */
 112#define IMM_SELECT_TMO  500     /* 500 how long to wait for target ? */
 113#define IMM_SPIN_TMO    5000    /* 50000 imm_wait loop limiter */
 114#define IMM_DEBUG       0       /* debugging option */
 115#define IN_EPP_MODE(x) (x == IMM_EPP_8 || x == IMM_EPP_16 || x == IMM_EPP_32)
 116
 117/* args to imm_connect */
 118#define CONNECT_EPP_MAYBE 1
 119#define CONNECT_NORMAL  0
 120
 121#define r_dtr(x)        (unsigned char)inb((x))
 122#define r_str(x)        (unsigned char)inb((x)+1)
 123#define r_ctr(x)        (unsigned char)inb((x)+2)
 124#define r_epp(x)        (unsigned char)inb((x)+4)
 125#define r_fifo(x)       (unsigned char)inb((x))   /* x must be base_hi */
 126                                        /* On PCI is: base+0x400 != base_hi */
 127#define r_ecr(x)        (unsigned char)inb((x)+2) /* x must be base_hi */
 128
 129#define w_dtr(x,y)      outb(y, (x))
 130#define w_str(x,y)      outb(y, (x)+1)
 131#define w_epp(x,y)      outb(y, (x)+4)
 132#define w_fifo(x,y)     outb(y, (x))     /* x must be base_hi */
 133#define w_ecr(x,y)      outb(y, (x)+0x2) /* x must be base_hi */
 134
 135#ifdef CONFIG_SCSI_IZIP_SLOW_CTR
 136#define w_ctr(x,y)      outb_p(y, (x)+2)
 137#else
 138#define w_ctr(x,y)      outb(y, (x)+2)
 139#endif
 140
 141static int imm_engine(imm_struct *, struct scsi_cmnd *);
 142
 143#endif                          /* _IMM_H */
 144
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