LXR linux-old/drivers/usb/hpusbscsi.h

   1/* Header file for the hpusbscsi driver */
   2/* (C) Copyright 2001 Oliver Neukum */
   3/* sponsored by the Linux Usb Project */
   4/* large parts based on or taken from code by John Fremlin and Matt Dharm */
   5/* this file is licensed under the GPL */
   6
   7/* A big thanks to Jose for untiring testing */
   8
   9typedef void (*usb_urb_callback) (struct urb *);
  10typedef void (*scsi_callback)(Scsi_Cmnd *);
  11
  12#define SENSE_COMMAND_SIZE 6
  13#define HPUSBSCSI_SENSE_LENGTH 0x16
  14
  15struct hpusbscsi
  16{
  17        struct list_head lh;
  18        struct usb_device *dev; /* NULL indicates unplugged device */
  19        int ep_out;
  20        int ep_in;
  21        int ep_int;
  22        int interrupt_interval;
  23        int need_short_workaround;
  24
  25        struct Scsi_Host *host;
  26        Scsi_Host_Template ctempl;
  27        int number;
  28       scsi_callback scallback;
  29       Scsi_Cmnd *srb;
  30        u8 sense_command[SENSE_COMMAND_SIZE];
  31
  32        int use_count;
  33        struct semaphore lock;
  34        wait_queue_head_t pending;
  35        wait_queue_head_t deathrow;
  36
  37        struct urb dataurb;
  38        struct urb controlurb;
  39        int fragment;
  40
  41        int state;
  42        int current_data_pipe;
  43
  44        u8 scsi_state_byte;
  45};
  46
  47#define SCSI_ERR_MASK ~0x3fu
  48
  49static const unsigned char scsi_command_direction[256/8] = {
  50        0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  51        0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  52        0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  53        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  54};
  55
  56#define DIRECTION_IS_IN(x) ((scsi_command_direction[x>>3] >> (x & 7)) & 1)
  57
  58static int hpusbscsi_scsi_detect (struct SHT * sht);
  59static void simple_command_callback(struct urb *u);
  60static void scatter_gather_callback(struct urb *u);
  61static void simple_payload_callback (struct urb *u);
  62static void control_interrupt_callback (struct urb *u);
  63static void request_sense_callback (struct urb *u);
  64static void simple_done (struct urb *u);
  65static int hpusbscsi_scsi_queuecommand (Scsi_Cmnd *srb, scsi_callback callback);
  66static int hpusbscsi_scsi_host_reset (Scsi_Cmnd *srb);
  67static int hpusbscsi_scsi_abort (Scsi_Cmnd *srb);
  68static void issue_request_sense (struct hpusbscsi *hpusbscsi);
  69
  70static Scsi_Host_Template hpusbscsi_scsi_host_template = {
  71        name:           "hpusbscsi",
  72        detect:         hpusbscsi_scsi_detect,
  73//      release:        hpusbscsi_scsi_release,
  74        queuecommand:   hpusbscsi_scsi_queuecommand,
  75
  76        eh_abort_handler:       hpusbscsi_scsi_abort,
  77        eh_host_reset_handler:  hpusbscsi_scsi_host_reset,
  78
  79        sg_tablesize:           SG_ALL,
  80        can_queue:              1,
  81        this_id:                -1,
  82        cmd_per_lun:            1,
  83        present:                0,
  84        unchecked_isa_dma:      FALSE,
  85        use_clustering:         TRUE,
  86        use_new_eh_code:        TRUE,
  87        emulated:               TRUE
  88};
  89
  90/* defines for internal driver state */
  91#define HP_STATE_FREE                 0  /*ready for next request */
  92#define HP_STATE_BEGINNING      1  /*command being transfered */
  93#define HP_STATE_WORKING         2  /* data transfer stage */
  94#define HP_STATE_ERROR             3  /* error has been reported */
  95#define HP_STATE_WAIT                 4  /* waiting for status transfer */
  96#define HP_STATE_PREMATURE              5 /* status prematurely reported */
  97
  98
  99