2 * Line 6 Linux USB driver
4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
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.
15 #include <linux/usb.h>
16 #include <linux/mutex.h>
17 #include <linux/kfifo.h>
18 #include <sound/core.h>
22 /* USB 1.1 speed configuration */
23 #define USB_LOW_INTERVALS_PER_SECOND 1000
24 #define USB_LOW_ISO_BUFFERS 2
26 /* USB 2.0+ speed configuration */
27 #define USB_HIGH_INTERVALS_PER_SECOND 8000
28 #define USB_HIGH_ISO_BUFFERS 16
30 /* Fallback USB interval and max packet size values */
31 #define LINE6_FALLBACK_INTERVAL 10
32 #define LINE6_FALLBACK_MAXPACKETSIZE 16
34 #define LINE6_TIMEOUT 1000
35 #define LINE6_BUFSIZE_LISTEN 64
36 #define LINE6_MIDI_MESSAGE_MAXLEN 256
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)
43 #if LINE6_BUFSIZE_LISTEN > 65535
44 #error "Use dynamic fifo instead"
48 Line 6 MIDI control commands
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
57 MIDI channel for messages initiated by the host
58 (and eventually echoed back by the device)
60 #define LINE6_CHANNEL_HOST 0x00
63 MIDI channel for messages initiated by the device
65 #define LINE6_CHANNEL_DEVICE 0x02
67 #define LINE6_CHANNEL_UNKNOWN 5 /* don't know yet what this is good for */
69 #define LINE6_CHANNEL_MASK 0x0f
71 #define CHECK_STARTUP_PROGRESS(x, n) \
78 extern const unsigned char line6_midi_id[3];
80 static const int SYSEX_DATA_OFS = sizeof(line6_midi_id) + 3;
81 static const int SYSEX_EXTRA_SIZE = sizeof(line6_midi_id) + 4;
84 Common properties of Line 6 devices.
86 struct line6_properties {
87 /* Card id string (maximum 16 characters).
88 * This can be used to address the device in ALSA programs as
93 /* Card short name (maximum 32 characters) */
96 /* Bit vector defining this device's capabilities in line6usb driver */
107 /* Capability bits */
109 /* device supports settings parameter via USB */
110 LINE6_CAP_CONTROL = 1 << 0,
111 /* device supports PCM input/output via USB */
112 LINE6_CAP_PCM = 1 << 1,
113 /* device supports hardware monitoring */
114 LINE6_CAP_HWMON = 1 << 2,
115 /* device requires output data when input is read */
116 LINE6_CAP_IN_NEEDS_OUT = 1 << 3,
117 /* device uses raw MIDI via USB (data endpoints) */
118 LINE6_CAP_CONTROL_MIDI = 1 << 4,
122 Common data shared by all Line 6 devices.
123 Corresponds to a pair of USB endpoints.
127 struct usb_device *usbdev;
130 const struct line6_properties *properties;
132 /* Interval for data USB packets */
134 /* ...for isochronous transfers framing */
135 int intervals_per_second;
137 /* Number of isochronous URBs used for frame transfers */
140 /* Maximum size of data USB packet */
143 /* Device representing the USB interface */
144 struct device *ifcdev;
146 /* Line 6 sound card data structure.
147 * Each device has at least MIDI or PCM.
149 struct snd_card *card;
151 /* Line 6 PCM device data structure */
152 struct snd_line6_pcm *line6pcm;
154 /* Line 6 MIDI device data structure */
155 struct snd_line6_midi *line6midi;
157 /* URB for listening to POD data endpoint */
158 struct urb *urb_listen;
160 /* Buffer for incoming data from POD data endpoint */
161 unsigned char *buffer_listen;
163 /* Buffer for message to be processed, generated from MIDI layer */
164 unsigned char *buffer_message;
166 /* Length of message to be processed, generated from MIDI layer */
169 /* Circular buffer for non-MIDI control messages */
171 struct mutex read_lock;
172 wait_queue_head_t wait_queue;
173 unsigned int active:1;
174 STRUCT_KFIFO_REC_2(LINE6_BUFSIZE_LISTEN * LINE6_RAW_MESSAGES_MAXCOUNT)
178 /* If MIDI is supported, buffer_message contains the pre-processed data;
179 * otherwise the data is only in urb_listen (buffer_incoming).
181 void (*process_message)(struct usb_line6 *);
182 void (*disconnect)(struct usb_line6 *line6);
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,
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 void line6_start_timer(struct timer_list *timer, unsigned long msecs,
198 void (*function)(unsigned long),
200 extern int line6_version_request_async(struct usb_line6 *line6);
201 extern int line6_write_data(struct usb_line6 *line6, unsigned address,
202 void *data, unsigned datalen);
204 int line6_probe(struct usb_interface *interface,
205 const struct usb_device_id *id,
206 const char *driver_name,
207 const struct line6_properties *properties,
208 int (*private_init)(struct usb_line6 *, const struct usb_device_id *id),
211 void line6_disconnect(struct usb_interface *interface);
214 int line6_suspend(struct usb_interface *interface, pm_message_t message);
215 int line6_resume(struct usb_interface *interface);