ALSA: usb/6fire - Driver for TerraTec DMX 6Fire USB
What is working: Everything except SPDIF - Hardware Master volume - PCM 44-192kHz@24 bits, 6 channels out, 4 channels in (analog) - MIDI in/out - firmware loading after cold start - phono/line switching Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Torsten Schenk
committed by
Takashi Iwai
Takashi Iwai
parent
49c6ad430d
commit
c6d43ba816
176
sound/usb/6fire/comm.c
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176
sound/usb/6fire/comm.c
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/*
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* Linux driver for TerraTec DMX 6Fire USB
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*
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* Device communications
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*
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* Author: Torsten Schenk <torsten.schenk@zoho.com>
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* Created: Jan 01, 2011
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* Version: 0.3.0
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* Copyright: (C) Torsten Schenk
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include "comm.h"
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#include "chip.h"
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#include "midi.h"
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enum {
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COMM_EP = 1,
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COMM_FPGA_EP = 2
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};
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static void usb6fire_comm_init_urb(struct comm_runtime *rt, struct urb *urb,
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u8 *buffer, void *context, void(*handler)(struct urb *urb))
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{
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usb_init_urb(urb);
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urb->transfer_buffer = buffer;
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urb->pipe = usb_sndintpipe(rt->chip->dev, COMM_EP);
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urb->complete = handler;
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urb->context = context;
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urb->interval = 1;
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urb->dev = rt->chip->dev;
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}
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static void usb6fire_comm_receiver_handler(struct urb *urb)
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{
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struct comm_runtime *rt = urb->context;
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struct midi_runtime *midi_rt = rt->chip->midi;
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if (!urb->status) {
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if (rt->receiver_buffer[0] == 0x10) /* midi in event */
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if (midi_rt)
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midi_rt->in_received(midi_rt,
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rt->receiver_buffer + 2,
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rt->receiver_buffer[1]);
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}
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if (!rt->chip->shutdown) {
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urb->status = 0;
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urb->actual_length = 0;
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if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
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snd_printk(KERN_WARNING PREFIX
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"comm data receiver aborted.\n");
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}
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}
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static void usb6fire_comm_init_buffer(u8 *buffer, u8 id, u8 request,
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u8 reg, u8 vl, u8 vh)
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{
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buffer[0] = 0x01;
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buffer[2] = request;
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buffer[3] = id;
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switch (request) {
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case 0x02:
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buffer[1] = 0x05; /* length (starting at buffer[2]) */
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buffer[4] = reg;
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buffer[5] = vl;
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buffer[6] = vh;
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break;
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case 0x12:
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buffer[1] = 0x0b; /* length (starting at buffer[2]) */
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buffer[4] = 0x00;
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buffer[5] = 0x18;
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buffer[6] = 0x05;
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buffer[7] = 0x00;
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buffer[8] = 0x01;
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buffer[9] = 0x00;
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buffer[10] = 0x9e;
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buffer[11] = reg;
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buffer[12] = vl;
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break;
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case 0x20:
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case 0x21:
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case 0x22:
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buffer[1] = 0x04;
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buffer[4] = reg;
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buffer[5] = vl;
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break;
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}
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}
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static int usb6fire_comm_send_buffer(u8 *buffer, struct usb_device *dev)
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{
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int ret;
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int actual_len;
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ret = usb_interrupt_msg(dev, usb_sndintpipe(dev, COMM_EP),
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buffer, buffer[1] + 2, &actual_len, HZ);
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if (ret < 0)
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return ret;
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else if (actual_len != buffer[1] + 2)
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return -EIO;
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return 0;
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}
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static int usb6fire_comm_write8(struct comm_runtime *rt, u8 request,
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u8 reg, u8 value)
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{
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u8 buffer[13]; /* 13: maximum length of message */
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usb6fire_comm_init_buffer(buffer, 0x00, request, reg, value, 0x00);
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return usb6fire_comm_send_buffer(buffer, rt->chip->dev);
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}
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static int usb6fire_comm_write16(struct comm_runtime *rt, u8 request,
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u8 reg, u8 vl, u8 vh)
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{
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u8 buffer[13]; /* 13: maximum length of message */
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usb6fire_comm_init_buffer(buffer, 0x00, request, reg, vl, vh);
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return usb6fire_comm_send_buffer(buffer, rt->chip->dev);
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}
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int __devinit usb6fire_comm_init(struct sfire_chip *chip)
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{
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struct comm_runtime *rt = kzalloc(sizeof(struct comm_runtime),
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GFP_KERNEL);
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struct urb *urb = &rt->receiver;
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int ret;
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if (!rt)
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return -ENOMEM;
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rt->serial = 1;
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rt->chip = chip;
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usb_init_urb(urb);
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rt->init_urb = usb6fire_comm_init_urb;
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rt->write8 = usb6fire_comm_write8;
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rt->write16 = usb6fire_comm_write16;
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/* submit an urb that receives communication data from device */
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urb->transfer_buffer = rt->receiver_buffer;
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urb->transfer_buffer_length = COMM_RECEIVER_BUFSIZE;
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urb->pipe = usb_rcvintpipe(chip->dev, COMM_EP);
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urb->dev = chip->dev;
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urb->complete = usb6fire_comm_receiver_handler;
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urb->context = rt;
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urb->interval = 1;
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ret = usb_submit_urb(urb, GFP_KERNEL);
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if (ret < 0) {
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kfree(rt);
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snd_printk(KERN_ERR PREFIX "cannot create comm data receiver.");
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return ret;
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}
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chip->comm = rt;
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return 0;
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}
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void usb6fire_comm_abort(struct sfire_chip *chip)
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{
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struct comm_runtime *rt = chip->comm;
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if (rt)
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usb_poison_urb(&rt->receiver);
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}
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void usb6fire_comm_destroy(struct sfire_chip *chip)
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{
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kfree(chip->comm);
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chip->comm = NULL;
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}
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