ddb6b5a964
Patch fixes 6fire not to use stack as URB transfer_buffer. URB buffers need to be DMA-able, which stack is not. Furthermore, transfer_buffer should not be allocated as part of larger device structure because DMA coherency issues and patch fixes this issue too. Cc: stable@vger.kernel.org Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi> Tested-by: Torsten Schenk <torsten.schenk@zoho.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/*
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* Linux driver for TerraTec DMX 6Fire USB
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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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* 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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#ifndef USB6FIRE_COMM_H
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#define USB6FIRE_COMM_H
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#include "common.h"
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enum /* settings for comm */
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{
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COMM_RECEIVER_BUFSIZE = 64,
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};
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struct comm_runtime {
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struct sfire_chip *chip;
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struct urb receiver;
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u8 *receiver_buffer;
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u8 serial; /* urb serial */
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void (*init_urb)(struct comm_runtime *rt, struct urb *urb, u8 *buffer,
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void *context, void(*handler)(struct urb *urb));
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/* writes control data to the device */
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int (*write8)(struct comm_runtime *rt, u8 request, u8 reg, u8 value);
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int (*write16)(struct comm_runtime *rt, u8 request, u8 reg,
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u8 vh, u8 vl);
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};
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int usb6fire_comm_init(struct sfire_chip *chip);
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void usb6fire_comm_abort(struct sfire_chip *chip);
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void usb6fire_comm_destroy(struct sfire_chip *chip);
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#endif /* USB6FIRE_COMM_H */
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