drivers/scsi/imm.h

   1
   2 /*  Driver for the Iomega MatchMaker parallel port SCSI HBA embedded in
   3  * the Iomega ZIP Plus drive
   4  *
   5  * (c) 1998     David Campbell     campbell@torque.net
   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/config.h>
  70 #include  <linux/stddef.h>
  71 #include  <linux/module.h>
  72 #include  <linux/kernel.h>
  73 #include  <linux/ioport.h>
  74 #include  <linux/delay.h>
  75 #include  <linux/proc_fs.h>
  76 #include  <linux/stat.h>
  77 #include  <linux/blkdev.h>
  78 #include  <linux/sched.h>
  79 #include  <linux/interrupt.h>
  80
  81 #include  <asm/io.h>
  82 #include  <scsi/scsi_host.h>
  83 /* batteries not included :-) */
  84
  85 /*
  86  * modes in which the driver can operate
  87  */
  88 #define   IMM_AUTODETECT        0       /* Autodetect mode                */
  89 #define   IMM_NIBBLE            1       /* work in standard 4 bit mode    */
  90 #define   IMM_PS2               2       /* PS/2 byte mode         */
  91 #define   IMM_EPP_8             3       /* EPP mode, 8 bit                */
  92 #define   IMM_EPP_16            4       /* EPP mode, 16 bit               */
  93 #define   IMM_EPP_32            5       /* EPP mode, 32 bit               */
  94 #define   IMM_UNKNOWN           6       /* Just in case...                */
  95
  96 static char *IMM_MODE_STRING[] =
  97 {
  98         [IMM_AUTODETECT] = "Autodetect",
  99         [IMM_NIBBLE]     = "SPP",
 100         [IMM_PS2]        = "PS/2",
 101         [IMM_EPP_8]      = "EPP 8 bit",
 102         [IMM_EPP_16]     = "EPP 16 bit",
 103 #ifdef CONFIG_SCSI_IZIP_EPP16
 104         [IMM_EPP_32]     = "EPP 16 bit",
 105 #else
 106         [IMM_EPP_32]     = "EPP 32 bit",
 107 #endif
 108         [IMM_UNKNOWN]    = "Unknown",
 109 };
 110
 111 /* other options */
 112 #define IMM_BURST_SIZE  512     /* data burst size */
 113 #define IMM_SELECT_TMO  500     /* 500 how long to wait for target ? */
 114 #define IMM_SPIN_TMO    5000    /* 50000 imm_wait loop limiter */
 115 #define IMM_DEBUG       0       /* debugging option */
 116 #define IN_EPP_MODE(x) (x == IMM_EPP_8 || x == IMM_EPP_16 || x == IMM_EPP_32)
 117
 118 /* args to imm_connect */
 119 #define CONNECT_EPP_MAYBE 1
 120 #define CONNECT_NORMAL  0
 121
 122 #define r_dtr(x)        (unsigned char)inb((x))
 123 #define r_str(x)        (unsigned char)inb((x)+1)
 124 #define r_ctr(x)        (unsigned char)inb((x)+2)
 125 #define r_epp(x)        (unsigned char)inb((x)+4)
 126 #define r_fifo(x)       (unsigned char)inb((x))   /* x must be base_hi */
 127                                         /* On PCI is: base+0x400 != base_hi */
 128 #define r_ecr(x)        (unsigned char)inb((x)+2) /* x must be base_hi */
 129
 130 #define w_dtr(x,y)      outb(y, (x))
 131 #define w_str(x,y)      outb(y, (x)+1)
 132 #define w_epp(x,y)      outb(y, (x)+4)
 133 #define w_fifo(x,y)     outb(y, (x))     /* x must be base_hi */
 134 #define w_ecr(x,y)      outb(y, (x)+0x2) /* x must be base_hi */
 135
 136 #ifdef CONFIG_SCSI_IZIP_SLOW_CTR
 137 #define w_ctr(x,y)      outb_p(y, (x)+2)
 138 #else
 139 #define w_ctr(x,y)      outb(y, (x)+2)
 140 #endif
 141
 142 static int imm_engine(imm_struct *, struct scsi_cmnd *);
 143
 144 #endif                          /* _IMM_H */