path: root/sound/isa/sb/sb16_csp.c

/*
 *  Copyright (c) 1999 by Uros Bizjak <uros@kss-loka.si>
 *                        Takashi Iwai <tiwai@suse.de>
 *
 *  SB16ASP/AWE32 CSP control
 *
 *  CSP microcode loader:
 *   alsa-tools/sb16_csp/ 
 *
 *   This program is free software; you can redistribute it and/or modify 
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
#include <sound/sb16_csp.h>
#include <sound/initval.h>

MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
MODULE_DESCRIPTION("ALSA driver for SB16 Creative Signal Processor");
MODULE_LICENSE("GPL");

#ifdef SNDRV_LITTLE_ENDIAN
#define CSP_HDR_VALUE(a,b,c,d)	((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
#else
#define CSP_HDR_VALUE(a,b,c,d)	((d) | ((c)<<8) | ((b)<<16) | ((a)<<24))
#endif

#define RIFF_HEADER	CSP_HDR_VALUE('R', 'I', 'F', 'F')
#define CSP__HEADER	CSP_HDR_VALUE('C', 'S', 'P', ' ')
#define LIST_HEADER	CSP_HDR_VALUE('L', 'I', 'S', 'T')
#define FUNC_HEADER	CSP_HDR_VALUE('f', 'u', 'n', 'c')
#define CODE_HEADER	CSP_HDR_VALUE('c', 'o', 'd', 'e')
#define INIT_HEADER	CSP_HDR_VALUE('i', 'n', 'i', 't')
#define MAIN_HEADER	CSP_HDR_VALUE('m', 'a', 'i', 'n')

/*
 * RIFF data format
 */
struct riff_header {
	__u32 name;
	__u32 len;
};

struct desc_header {
	struct riff_header info;
	__u16 func_nr;
	__u16 VOC_type;
	__u16 flags_play_rec;
	__u16 flags_16bit_8bit;
	__u16 flags_stereo_mono;
	__u16 flags_rates;
};

/*
 * prototypes
 */
static void snd_sb_csp_free(struct snd_hwdep *hw);
static int snd_sb_csp_open(struct snd_hwdep * hw, struct file *file);
static int snd_sb_csp_ioctl(struct snd_hwdep * hw, struct file *file, unsigned int cmd, unsigned long arg);
static int snd_sb_csp_release(struct snd_hwdep * hw, struct file *file);

static int csp_detect(struct snd_sb *chip, int *version);
static int set_codec_parameter(struct snd_sb *chip, unsigned char par, unsigned char val);
static int set_register(struct snd_sb *chip, unsigned char reg, unsigned char val);
static int read_register(struct snd_sb *chip, unsigned char reg);
static int set_mode_register(struct snd_sb *chip, unsigned char mode);
static int get_version(struct snd_sb *chip);

static int snd_sb_csp_riff_load(struct snd_sb_csp * p,
				struct snd_sb_csp_microcode __user * code);
static int snd_sb_csp_unload(struct snd_sb_csp * p);
static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags);
static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec_mode);
static int snd_sb_csp_check_version(struct snd_sb_csp * p);

static int snd_sb_csp_use(struct snd_sb_csp * p);
static int snd_sb_csp_unuse(struct snd_sb_csp * p);
static int snd_sb_csp_start(struct snd_sb_csp * p, int sample_width, int channels);
static int snd_sb_csp_stop(struct snd_sb_csp * p);
static int snd_sb_csp_pause(struct