[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / isdn / mISDN / dsp_hwec.c

/*
 * dsp_hwec.c:
 * builtin mISDN dsp pipeline element for enabling the hw echocanceller
 *
 * Copyright (C) 2007, Nadi Sarrar
 *
 * Nadi Sarrar <nadi@beronet.com>
 *
 * 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.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 */

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mISDNdsp.h>
#include <linux/mISDNif.h>
#include "core.h"
#include "dsp.h"
#include "dsp_hwec.h"

static struct mISDN_dsp_element_arg args[] = {
	{ "deftaps", "128", "Set the number of taps of cancellation." },
};

static struct mISDN_dsp_element dsp_hwec_p = {
	.name = "hwec",
	.new = NULL,
	.free = NULL,
	.process_tx = NULL,
	.process_rx = NULL,
	.num_args = ARRAY_SIZE(args),
	.args = args,
};
struct mISDN_dsp_element *dsp_hwec = &dsp_hwec_p;

void dsp_hwec_enable(struct dsp *dsp, const char *arg)
{
	int deftaps = 128,
		len;
	struct mISDN_ctrl_req	cq;

	if (!dsp) {
		printk(KERN_ERR "%s: failed to enable hwec: dsp is NULL\n",
		       __func__);
		return;
	}

	if (!arg)
		goto _do;

	len = strlen(arg);
	if (!len)
		goto _do;

	{
		char _dup[len + 1];
		char *dup, *tok, *name, *val;
		int tmp;

		strcpy(_dup, arg);
		dup = _dup;

		while ((tok = strsep(&dup, ","))) {
			if (!strlen(tok))
				continue;
			name = strsep(&tok, "=");
			val = tok;

			if (!val)
				continue;

			if (!strcmp(name, "deftaps")) {
				if (sscanf(val, "%d", &tmp) == 1)
					deftaps = tmp;
			}
		}
	}

_do:
	printk(KERN_DEBUG "%s: enabling hwec with deftaps=%d\n",
	       __func__, deftaps);
	memset(&cq, 0, sizeof(cq));
	cq.op = MISDN_CTRL_HFC_ECHOCAN_ON;
	cq.p1 = deftaps;
	if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
		printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
		       __func__);
		return;
	}
}

void dsp_hwec_disable(struct dsp *dsp)
{
	struct mISDN_ctrl_req	cq;

	if (!dsp) {
		printk(KERN_ERR "%s: failed to disable hwec: dsp is NULL\n",
		       __func__);
		return;
	}

	printk(KERN_DEBUG "%s: disabling hwec\n", __func__);
	memset(&cq, 0, sizeof(cq));
	cq.op = MISDN_CTRL_HFC_ECHOCAN_OFF;
	if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
		printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
		       __func__);
		return;
	}
}

int dsp_hwec_init(void)
{
	mISDN_dsp_element_register(dsp_hwec);

	return 0;
}

void dsp_hwec_exit(void)
{
	mISDN_dsp_element_unregister(dsp_hwec);
}
Commit	Line	Data
960366cf KK	1	/*
	2	* dsp_hwec.c:
	3	* builtin mISDN dsp pipeline element for enabling the hw echocanceller
	4	*
	5	* Copyright (C) 2007, Nadi Sarrar
	6	*
	7	* Nadi Sarrar <nadi@beronet.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the Free
	11	* Software Foundation; either version 2 of the License, or (at your option)
	12	* any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	17	* more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along with
	20	* this program; if not, write to the Free Software Foundation, Inc., 59
	21	* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	22	*
	23	* The full GNU General Public License is included in this distribution in the
	24	* file called LICENSE.
	25	*
	26	*/
	27
	28	#include <linux/kernel.h>
	29	#include <linux/string.h>
	30	#include <linux/mISDNdsp.h>
	31	#include <linux/mISDNif.h>
	32	#include "core.h"
	33	#include "dsp.h"
	34	#include "dsp_hwec.h"
	35
	36	static struct mISDN_dsp_element_arg args[] = {
	37	{ "deftaps", "128", "Set the number of taps of cancellation." },
	38	};
	39
	40	static struct mISDN_dsp_element dsp_hwec_p = {
	41	.name = "hwec",
	42	.new = NULL,
	43	.free = NULL,
	44	.process_tx = NULL,
	45	.process_rx = NULL,
fd568fc3	46	.num_args = ARRAY_SIZE(args),
960366cf KK	47	.args = args,
	48	};
	49	struct mISDN_dsp_element *dsp_hwec = &dsp_hwec_p;
	50
	51	void dsp_hwec_enable(struct dsp dsp, const char arg)
	52	{
	53	int deftaps = 128,
	54	len;
	55	struct mISDN_ctrl_req cq;
	56
	57	if (!dsp) {
	58	printk(KERN_ERR "%s: failed to enable hwec: dsp is NULL\n",
475be4d8	59	__func__);
960366cf KK	60	return;
	61	}
	62
	63	if (!arg)
	64	goto _do;
	65
	66	len = strlen(arg);
	67	if (!len)
	68	goto _do;
	69
	70	{
	71	char _dup[len + 1];
	72	char dup, tok, name, val;
	73	int tmp;
	74
	75	strcpy(_dup, arg);
	76	dup = _dup;
	77
	78	while ((tok = strsep(&dup, ","))) {
	79	if (!strlen(tok))
	80	continue;
	81	name = strsep(&tok, "=");
	82	val = tok;
	83
	84	if (!val)
	85	continue;
	86
	87	if (!strcmp(name, "deftaps")) {
	88	if (sscanf(val, "%d", &tmp) == 1)
	89	deftaps = tmp;
	90	}
	91	}
	92	}
	93
	94	_do:
	95	printk(KERN_DEBUG "%s: enabling hwec with deftaps=%d\n",
475be4d8	96	__func__, deftaps);
960366cf KK	97	memset(&cq, 0, sizeof(cq));
	98	cq.op = MISDN_CTRL_HFC_ECHOCAN_ON;
	99	cq.p1 = deftaps;
	100	if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
	101	printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
475be4d8	102	__func__);
960366cf KK	103	return;
	104	}
	105	}
	106
	107	void dsp_hwec_disable(struct dsp *dsp)
	108	{
	109	struct mISDN_ctrl_req cq;
	110
	111	if (!dsp) {
	112	printk(KERN_ERR "%s: failed to disable hwec: dsp is NULL\n",
475be4d8	113	__func__);
960366cf KK	114	return;
	115	}
	116
	117	printk(KERN_DEBUG "%s: disabling hwec\n", __func__);
	118	memset(&cq, 0, sizeof(cq));
	119	cq.op = MISDN_CTRL_HFC_ECHOCAN_OFF;
	120	if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
	121	printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
475be4d8	122	__func__);
960366cf KK	123	return;
	124	}
	125	}
	126
	127	int dsp_hwec_init(void)
	128	{
	129	mISDN_dsp_element_register(dsp_hwec);
	130
	131	return 0;
	132	}
	133
	134	void dsp_hwec_exit(void)
	135	{
	136	mISDN_dsp_element_unregister(dsp_hwec);
	137	}