9e567af4f0
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 4 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520075211.959886972@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
123 lines
2.3 KiB
C
123 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* dsp_hwec.c:
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* builtin mISDN dsp pipeline element for enabling the hw echocanceller
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*
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* Copyright (C) 2007, Nadi Sarrar
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*
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* Nadi Sarrar <nadi@beronet.com>
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mISDNdsp.h>
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#include <linux/mISDNif.h>
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#include "core.h"
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#include "dsp.h"
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#include "dsp_hwec.h"
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static struct mISDN_dsp_element_arg args[] = {
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{ "deftaps", "128", "Set the number of taps of cancellation." },
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};
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static struct mISDN_dsp_element dsp_hwec_p = {
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.name = "hwec",
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.new = NULL,
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.free = NULL,
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.process_tx = NULL,
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.process_rx = NULL,
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.num_args = ARRAY_SIZE(args),
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.args = args,
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};
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struct mISDN_dsp_element *dsp_hwec = &dsp_hwec_p;
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void dsp_hwec_enable(struct dsp *dsp, const char *arg)
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{
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int deftaps = 128,
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len;
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struct mISDN_ctrl_req cq;
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if (!dsp) {
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printk(KERN_ERR "%s: failed to enable hwec: dsp is NULL\n",
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__func__);
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return;
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}
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if (!arg)
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goto _do;
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len = strlen(arg);
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if (!len)
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goto _do;
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{
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char *dup, *tok, *name, *val;
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int tmp;
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dup = kstrdup(arg, GFP_ATOMIC);
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if (!dup)
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return;
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while ((tok = strsep(&dup, ","))) {
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if (!strlen(tok))
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continue;
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name = strsep(&tok, "=");
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val = tok;
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if (!val)
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continue;
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if (!strcmp(name, "deftaps")) {
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if (sscanf(val, "%d", &tmp) == 1)
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deftaps = tmp;
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}
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}
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kfree(dup);
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}
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_do:
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printk(KERN_DEBUG "%s: enabling hwec with deftaps=%d\n",
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__func__, deftaps);
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memset(&cq, 0, sizeof(cq));
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cq.op = MISDN_CTRL_HFC_ECHOCAN_ON;
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cq.p1 = deftaps;
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if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
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printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
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__func__);
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return;
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}
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}
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void dsp_hwec_disable(struct dsp *dsp)
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{
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struct mISDN_ctrl_req cq;
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if (!dsp) {
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printk(KERN_ERR "%s: failed to disable hwec: dsp is NULL\n",
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__func__);
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return;
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}
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printk(KERN_DEBUG "%s: disabling hwec\n", __func__);
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memset(&cq, 0, sizeof(cq));
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cq.op = MISDN_CTRL_HFC_ECHOCAN_OFF;
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if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
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printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
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__func__);
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return;
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}
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}
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int dsp_hwec_init(void)
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{
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mISDN_dsp_element_register(dsp_hwec);
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return 0;
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}
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void dsp_hwec_exit(void)
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{
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mISDN_dsp_element_unregister(dsp_hwec);
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}
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