1 /* 2 * Line 6 Linux USB driver 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/usb.h> 16 #include <linux/mutex.h> 17 #include <linux/kfifo.h> 18 #include <sound/core.h> 19 20 #include "midi.h" 21 22 /* USB 1.1 speed configuration */ 23 #define USB_LOW_INTERVALS_PER_SECOND 1000 24 #define USB_LOW_ISO_BUFFERS 2 25 26 /* USB 2.0+ speed configuration */ 27 #define USB_HIGH_INTERVALS_PER_SECOND 8000 28 #define USB_HIGH_ISO_BUFFERS 16 29 30 /* Fallback USB interval and max packet size values */ 31 #define LINE6_FALLBACK_INTERVAL 10 32 #define LINE6_FALLBACK_MAXPACKETSIZE 16 33 34 #define LINE6_TIMEOUT 1 35 #define LINE6_BUFSIZE_LISTEN 64 36 #define LINE6_MIDI_MESSAGE_MAXLEN 256 37 38 #define LINE6_RAW_MESSAGES_MAXCOUNT_ORDER 7 39 /* 4k packets are common, BUFSIZE * MAXCOUNT should be bigger... */ 40 #define LINE6_RAW_MESSAGES_MAXCOUNT (1 << LINE6_RAW_MESSAGES_MAXCOUNT_ORDER) 41 42 43 #if LINE6_BUFSIZE_LISTEN > 65535 44 #error "Use dynamic fifo instead" 45 #endif 46 47 /* 48 Line 6 MIDI control commands 49 */ 50 #define LINE6_PARAM_CHANGE 0xb0 51 #define LINE6_PROGRAM_CHANGE 0xc0 52 #define LINE6_SYSEX_BEGIN 0xf0 53 #define LINE6_SYSEX_END 0xf7 54 #define LINE6_RESET 0xff 55 56 /* 57 MIDI channel for messages initiated by the host 58 (and eventually echoed back by the device) 59 */ 60 #define LINE6_CHANNEL_HOST 0x00 61 62 /* 63 MIDI channel for messages initiated by the device 64 */ 65 #define LINE6_CHANNEL_DEVICE 0x02 66 67 #define LINE6_CHANNEL_UNKNOWN 5 /* don't know yet what this is good for */ 68 69 #define LINE6_CHANNEL_MASK 0x0f 70 71 extern const unsigned char line6_midi_id[3]; 72 73 static const int SYSEX_DATA_OFS = sizeof(line6_midi_id) + 3; 74 static const int SYSEX_EXTRA_SIZE = sizeof(line6_midi_id) + 4; 75 76 /* 77 Common properties of Line 6 devices. 78 */ 79 struct line6_properties { 80 /* Card id string (maximum 16 characters). 81 * This can be used to address the device in ALSA programs as 82 * "default:CARD=<id>" 83 */ 84 const char *id; 85 86 /* Card short name (maximum 32 characters) */ 87 const char *name; 88 89 /* Bit vector defining this device's capabilities in line6usb driver */ 90 int capabilities; 91 92 int altsetting; 93 94 unsigned int ctrl_if; 95 unsigned int ep_ctrl_r; 96 unsigned int ep_ctrl_w; 97 unsigned int ep_audio_r; 98 unsigned int ep_audio_w; 99 }; 100 101 /* Capability bits */ 102 enum { 103 /* device supports settings parameter via USB */ 104 LINE6_CAP_CONTROL = 1 << 0, 105 /* device supports PCM input/output via USB */ 106 LINE6_CAP_PCM = 1 << 1, 107 /* device supports hardware monitoring */ 108 LINE6_CAP_HWMON = 1 << 2, 109 /* device requires output data when input is read */ 110 LINE6_CAP_IN_NEEDS_OUT = 1 << 3, 111 /* device uses raw MIDI via USB (data endpoints) */ 112 LINE6_CAP_CONTROL_MIDI = 1 << 4, 113 /* device provides low-level information */ 114 LINE6_CAP_CONTROL_INFO = 1 << 5, 115 }; 116 117 /* 118 Common data shared by all Line 6 devices. 119 Corresponds to a pair of USB endpoints. 120 */ 121 struct usb_line6 { 122 /* USB device */ 123 struct usb_device *usbdev; 124 125 /* Properties */ 126 const struct line6_properties *properties; 127 128 /* Interval for data USB packets */ 129 int interval; 130 /* ...for isochronous transfers framing */ 131 int intervals_per_second; 132 133 /* Number of isochronous URBs used for frame transfers */ 134 int iso_buffers; 135 136 /* Maximum size of data USB packet */ 137 int max_packet_size; 138 139 /* Device representing the USB interface */ 140 struct device *ifcdev; 141 142 /* Line 6 sound card data structure. 143 * Each device has at least MIDI or PCM. 144 */ 145 struct snd_card *card; 146 147 /* Line 6 PCM device data structure */ 148 struct snd_line6_pcm *line6pcm; 149 150 /* Line 6 MIDI device data structure */ 151 struct snd_line6_midi *line6midi; 152 153 /* URB for listening to POD data endpoint */ 154 struct urb *urb_listen; 155 156 /* Buffer for incoming data from POD data endpoint */ 157 unsigned char *buffer_listen; 158 159 /* Buffer for message to be processed, generated from MIDI layer */ 160 unsigned char *buffer_message; 161 162 /* Length of message to be processed, generated from MIDI layer */ 163 int message_length; 164 165 /* Circular buffer for non-MIDI control messages */ 166 struct { 167 struct mutex read_lock; 168 wait_queue_head_t wait_queue; 169 unsigned int active:1; 170 STRUCT_KFIFO_REC_2(LINE6_BUFSIZE_LISTEN * LINE6_RAW_MESSAGES_MAXCOUNT) 171 fifo; 172 } messages; 173 174 /* Work for delayed PCM startup */ 175 struct delayed_work startup_work; 176 177 /* If MIDI is supported, buffer_message contains the pre-processed data; 178 * otherwise the data is only in urb_listen (buffer_incoming). 179 */ 180 void (*process_message)(struct usb_line6 *); 181 void (*disconnect)(struct usb_line6 *line6); 182 void (*startup)(struct usb_line6 *line6); 183 }; 184 185 extern char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, 186 int code2, int size); 187 extern int line6_read_data(struct usb_line6 *line6, unsigned address, 188 void *data, unsigned datalen); 189 extern int line6_read_serial_number(struct usb_line6 *line6, 190 u32 *serial_number); 191 extern int line6_send_raw_message_async(struct usb_line6 *line6, 192 const char *buffer, int size); 193 extern int line6_send_sysex_message(struct usb_line6 *line6, 194 const char *buffer, int size); 195 extern ssize_t line6_set_raw(struct device *dev, struct device_attribute *attr, 196 const char *buf, size_t count); 197 extern int line6_version_request_async(struct usb_line6 *line6); 198 extern int line6_write_data(struct usb_line6 *line6, unsigned address, 199 void *data, unsigned datalen); 200 201 int line6_probe(struct usb_interface *interface, 202 const struct usb_device_id *id, 203 const char *driver_name, 204 const struct line6_properties *properties, 205 int (*private_init)(struct usb_line6 *, const struct usb_device_id *id), 206 size_t data_size); 207 208 void line6_disconnect(struct usb_interface *interface); 209 210 #ifdef CONFIG_PM 211 int line6_suspend(struct usb_interface *interface, pm_message_t message); 212 int line6_resume(struct usb_interface *interface); 213 #endif 214 215 #endif 216