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   "2.03 (for Linux 2.0.0)"
  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  */
  63 /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
  64
  65 #ifdef IMM_CODE
  66 #include  <linux/config.h>
  67 #include  <linux/stddef.h>
  68 #include  <linux/module.h>
  69 #include  <linux/kernel.h>
  70 #include  <linux/tqueue.h>
  71 #include  <linux/ioport.h>
  72 #include  <linux/delay.h>
  73 #include  <linux/proc_fs.h>
  74 #include  <linux/stat.h>
  75 #include  <linux/blk.h>
  76 #include  <linux/sched.h>
  77 #include  <linux/interrupt.h>
  78
  79 #include  <asm/io.h>
  80 #include  "sd.h"
  81 #include  "hosts.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
  95 static char *IMM_MODE_STRING[] =
  96 {
  97     "Autodetect",
  98     "SPP",
  99     "PS/2",
 100     "EPP 8 bit",
 101     "EPP 16 bit",
 102 #ifdef CONFIG_SCSI_IZIP_EPP16
 103     "EPP 16 bit",
 104 #else
 105     "EPP 32 bit",
 106 #endif
 107     "Unknown"};
 108
 109 /* This is a global option */
 110 int imm_sg = SG_ALL;            /* enable/disable scatter-gather. */
 111
 112 /* other options */
 113 #define IMM_CAN_QUEUE   1       /* use "queueing" interface */
 114 #define IMM_BURST_SIZE  512     /* data burst size */
 115 #define IMM_SELECT_TMO  500     /* 500 how long to wait for target ? */
 116 #define IMM_SPIN_TMO    5000    /* 50000 imm_wait loop limiter */
 117 #define IMM_DEBUG       0       /* debuging option */
 118 #define IN_EPP_MODE(x) (x == IMM_EPP_8 || x == IMM_EPP_16 || x == IMM_EPP_32)
 119
 120 /* args to imm_connect */
 121 #define CONNECT_EPP_MAYBE 1
 122 #define CONNECT_NORMAL  0
 123
 124 #define r_dtr(x)        (unsigned char)inb((x))
 125 #define r_str(x)        (unsigned char)inb((x)+1)
 126 #define r_ctr(x)        (unsigned char)inb((x)+2)
 127 #define r_epp(x)        (unsigned char)inb((x)+4)
 128 #define r_fifo(x)       (unsigned char)inb((x)+0x400)
 129 #define r_ecr(x)        (unsigned char)inb((x)+0x402)
 130
 131 #define w_dtr(x,y)      outb(y, (x))
 132 #define w_str(x,y)      outb(y, (x)+1)
 133 #define w_epp(x,y)      outb(y, (x)+4)
 134 #define w_fifo(x,y)     outb(y, (x)+0x400)
 135 #define w_ecr(x,y)      outb(y, (x)+0x402)
 136
 137 #ifdef CONFIG_SCSI_IZIP_SLOW_CTR
 138 #define w_ctr(x,y)      outb_p(y, (x)+2)
 139 #else
 140 #define w_ctr(x,y)      outb(y, (x)+2)
 141 #endif
 142
 143 static int imm_engine(imm_struct *, Scsi_Cmnd *);
 144 static int imm_in(int, char *, int);
 145 static int imm_init(int);
 146 static void imm_interrupt(void *);
 147 static int imm_out(int, char *, int);
 148
 149 struct proc_dir_entry proc_scsi_imm =
 150 {PROC_SCSI_PPA, 3, "imm", S_IFDIR | S_IRUGO | S_IXUGO, 2};
 151 #else
 152 extern struct proc_dir_entry proc_scsi_imm;
 153 #define imm_release 0
 154 #endif
 155
 156 int imm_detect(Scsi_Host_Template *);
 157 const char *imm_info(struct Scsi_Host *);
 158 int imm_command(Scsi_Cmnd *);
 159 int imm_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *));
 160 int imm_abort(Scsi_Cmnd *);
 161 int imm_reset(Scsi_Cmnd *);
 162 int imm_proc_info(char *, char **, off_t, int, int, int);
 163 int imm_biosparam(Disk *, kdev_t, int *);
 164
 165 #define IMM {   proc_dir:                       &proc_scsi_imm,         \
 166                 proc_info:                      imm_proc_info,          \
 167                 name:                           "Iomega VPI2 (imm) interface",\
 168                 detect:                         imm_detect,             \
 169                 release:                        imm_release,            \
 170                 command:                        imm_command,            \
 171                 queuecommand:                   imm_queuecommand,       \
 172                 eh_abort_handler:               imm_abort,              \
 173                 eh_device_reset_handler:        NULL,                   \
 174                 eh_bus_reset_handler:           imm_reset,              \
 175                 eh_host_reset_handler:          imm_reset,              \
 176                 bios_param:                     imm_biosparam,          \
 177                 this_id:                        7,                      \
 178                 sg_tablesize:                   SG_ALL,                 \
 179                 cmd_per_lun:                    1,                      \
 180                 use_clustering:                 ENABLE_CLUSTERING       \
 181 }
 182 #endif                          /* _IMM_H */