drivers/staging/line6/driver.h

   1 /*
   2  * Line6 Linux USB driver - 0.9.1beta
   3  *
   4  * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
   5  *
   6  *      This program is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU General Public License as
   8  *      published by the Free Software Foundation, version 2.
   9  *
  10  */
  11
  12 #ifndef DRIVER_H
  13 #define DRIVER_H
  14
  15 #include <linux/spinlock.h>
  16 #include <linux/usb.h>
  17 #include <sound/core.h>
  18
  19 #include "midi.h"
  20
  21 #define DRIVER_NAME "line6usb"
  22
  23 #define LINE6_TIMEOUT 1
  24 #define LINE6_BUFSIZE_LISTEN 32
  25 #define LINE6_MESSAGE_MAXLEN 256
  26
  27 /*
  28         Line6 MIDI control commands
  29 */
  30 #define LINE6_PARAM_CHANGE   0xb0
  31 #define LINE6_PROGRAM_CHANGE 0xc0
  32 #define LINE6_SYSEX_BEGIN    0xf0
  33 #define LINE6_SYSEX_END      0xf7
  34 #define LINE6_RESET          0xff
  35
  36 /*
  37         MIDI channel for messages initiated by the host
  38         (and eventually echoed back by the device)
  39 */
  40 #define LINE6_CHANNEL_HOST   0x00
  41
  42 /*
  43         MIDI channel for messages initiated by the device
  44 */
  45 #define LINE6_CHANNEL_DEVICE 0x02
  46
  47 #define LINE6_CHANNEL_UNKNOWN 5 /* don't know yet what this is good for */
  48
  49 #define LINE6_CHANNEL_MASK 0x0f
  50
  51 #define MISSING_CASE    \
  52         pr_err("line6usb driver bug: missing case in %s:%d\n", \
  53                 __FILE__, __LINE__)
  54
  55 #define CHECK_RETURN(x)         \
  56 do {                            \
  57         err = x;                \
  58         if (err < 0)            \
  59                 return err;     \
  60 } while (0)
  61
  62 #define CHECK_STARTUP_PROGRESS(x, n)    \
  63 do {                                    \
  64         if ((x) >= (n))                 \
  65                 return;                 \
  66         x = (n);                        \
  67 } while (0)
  68
  69 extern const unsigned char line6_midi_id[3];
  70
  71 static const int SYSEX_DATA_OFS = sizeof(line6_midi_id) + 3;
  72 static const int SYSEX_EXTRA_SIZE = sizeof(line6_midi_id) + 4;
  73
  74 /**
  75          Common properties of Line6 devices.
  76 */
  77 struct line6_properties {
  78         /**
  79                  Bit identifying this device in the line6usb driver.
  80         */
  81         int device_bit;
  82
  83         /**
  84                  Card id string (maximum 16 characters).
  85                  This can be used to address the device in ALSA programs as
  86                  "default:CARD=<id>"
  87         */
  88         const char *id;
  89
  90         /**
  91                  Card short name (maximum 32 characters).
  92         */
  93         const char *name;
  94
  95         /**
  96                  Bit vector defining this device's capabilities in the
  97                  line6usb driver.
  98         */
  99         int capabilities;
 100 };
 101
 102 /**
 103          Common data shared by all Line6 devices.
 104          Corresponds to a pair of USB endpoints.
 105 */
 106 struct usb_line6 {
 107         /**
 108                  USB device.
 109         */
 110         struct usb_device *usbdev;
 111
 112         /**
 113                  Product id.
 114         */
 115         int product;
 116
 117         /**
 118                  Properties.
 119         */
 120         const struct line6_properties *properties;
 121
 122         /**
 123                  Interface number.
 124         */
 125         int interface_number;
 126
 127         /**
 128                  Interval (ms).
 129         */
 130         int interval;
 131
 132         /**
 133                  Maximum size of USB packet.
 134         */
 135         int max_packet_size;
 136
 137         /**
 138                  Device representing the USB interface.
 139         */
 140         struct device *ifcdev;
 141
 142         /**
 143                  Line6 sound card data structure.
 144                  Each device has at least MIDI or PCM.
 145         */
 146         struct snd_card *card;
 147
 148         /**
 149                  Line6 PCM device data structure.
 150         */
 151         struct snd_line6_pcm *line6pcm;
 152
 153         /**
 154                  Line6 MIDI device data structure.
 155         */
 156         struct snd_line6_midi *line6midi;
 157
 158         /**
 159                  USB endpoint for listening to control commands.
 160         */
 161         int ep_control_read;
 162
 163         /**
 164                  USB endpoint for writing control commands.
 165         */
 166         int ep_control_write;
 167
 168         /**
 169                  URB for listening to PODxt Pro control endpoint.
 170         */
 171         struct urb *urb_listen;
 172
 173         /**
 174                  Buffer for listening to PODxt Pro control endpoint.
 175         */
 176         unsigned char *buffer_listen;
 177
 178         /**
 179                  Buffer for message to be processed.
 180         */
 181         unsigned char *buffer_message;
 182
 183         /**
 184                  Length of message to be processed.
 185         */
 186         int message_length;
 187 };
 188
 189 extern char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1,
 190                                       int code2, int size);
 191 extern ssize_t line6_nop_read(struct device *dev,
 192                               struct device_attribute *attr, char *buf);
 193 extern int line6_read_data(struct usb_line6 *line6, int address, void *data,
 194                            size_t datalen);
 195 extern int line6_read_serial_number(struct usb_line6 *line6,
 196                                     int *serial_number);
 197 extern int line6_send_program(struct usb_line6 *line6, u8 value);
 198 extern int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
 199                                   int size);
 200 extern int line6_send_raw_message_async(struct usb_line6 *line6,
 201                                         const char *buffer, int size);
 202 extern int line6_send_sysex_message(struct usb_line6 *line6,
 203                                     const char *buffer, int size);
 204 extern ssize_t line6_set_raw(struct device *dev, struct device_attribute *attr,
 205                              const char *buf, size_t count);
 206 extern void line6_start_timer(struct timer_list *timer, unsigned int msecs,
 207                               void (*function) (unsigned long),
 208                               unsigned long data);
 209 extern int line6_transmit_parameter(struct usb_line6 *line6, int param,
 210                                     u8 value);
 211 extern int line6_version_request_async(struct usb_line6 *line6);
 212 extern int line6_write_data(struct usb_line6 *line6, int address, void *data,
 213                             size_t datalen);
 214
 215 #endif