/* * Author Andreas Eversberg (jolly@eversberg.eu) * Based on source code structure by * Karsten Keil (keil@isdn4linux.de) * * This file is (c) under GNU PUBLIC LICENSE * * Thanks to Karsten Keil (great drivers) * Cologne Chip (great chips) * * This module does: * Real-time tone generation * DTMF detection * Real-time cross-connection and conferrence * Compensate jitter due to system load and hardware fault. * All features are done in kernel space and will be realized * using hardware, if available and supported by chip set. * Blowfish encryption/decryption */ /* STRUCTURE: * * The dsp module provides layer 2 for b-channels (64kbit). It provides * transparent audio forwarding with special digital signal processing: * * - (1) generation of tones * - (2) detection of dtmf tones * - (3) crossconnecting and conferences (clocking) * - (4) echo generation for delay test * - (5) volume control * - (6) disable receive data * - (7) pipeline * - (8) encryption/decryption * * Look: * TX RX * ------upper layer------ * | ^ * | |(6) * v | * +-----+-------------+-----+ * |(3)(4) | * | CMX | * | | * | +-------------+ * | | ^ * | | | * |+---------+| +----+----+ * ||(1) || |(2) | * || || | | * || Tones || | DTMF | * || || | | * || || | | * |+----+----+| +----+----+ * +-----+-----+ ^ * | | * v | * +----+----+ +----+----+ * |(5) | |(5) | * | | | | * |TX Volume| |RX Volume| * | | | | * | | | | * +----+----+ +----+----+ * | ^ * | | * v | * +----+-------------+----+ * |(7) | * | | * | Pipeline Processing | * | | * | | * +----+-------------+----+ * | ^ * | | * v | * +----+----+ +----+----+ * |(8) | |(8) | * | | | | * | Encrypt | | Decrypt | * | | | | * | | | | * +----+----+ +----+----+ * | ^ * | | * v | * ------card layer------ * TX RX * * Above you can see the logical data flow. If software is used to do the * process, it is actually the real data flow. If hardware is used, data * may not flow, but hardware commands to the card, to provide the data flow * as shown. * * NOTE: The channel must be activated in order to make dsp work, even if * no data flow to the upper layer is intended. Activation can be done * after and before controlling the setting using PH_CONTROL requests. * * DTMF: Will be detected by hardware if possible. It is done before CMX * processing. * * Tones: Will be generated via software if endless looped audio fifos are * not supported by hardware. Tones will override all data from CMX. * It is not required to join a conference to use tones at any time. * * CMX: Is transparent when not used. When it is used, it will do * crossconnections and conferences via software if not possible through * hardware. If hardware capability is available, hardware is used. * * Echo: Is generated by CMX and is used to check performance of hard and * software CMX. * * The CMX has special functions for conferences with one, two and more * members. It will allow different types of data flow. Receive and transmit * data to/form upper layer may be switched on/off individually without losing * features of CMX, Tones and DTMF. * * Echo Cancellation: Sometimes we like to cancel echo from the interface. * Note that a VoIP call may not have echo caused by the IP phone. The echo * is generated by the telephone line connected to it. Because the delay * is high, it becomes an echo. RESULT: Echo Cachelation is required if * both echo AND delay is applied to an interface. * Remember that software CMX always generates a more or less delay. * * If all used features can be realized in hardware, and if transmit and/or * receive data ist disabled, the card may not send/receive any data at all. * Not receiving is useful if only announcements are played. Not sending is * useful if an answering machine records audio. Not sending and receiving is * useful during most states of the call. If supported by hardware, tones * will be played without cpu load. Small PBXs and NT-Mode applications will * not need expensive hardware when processing calls. * * * LOCKING: * * When data is received from upper or lower layer (card), the complete dsp * module is locked by a global lock. This lock MUST lock irq, because it * must lock timer events by DSP poll timer. * When data is ready to be transmitted down, the data is queued and sent * outside lock and timer event. * PH_CONTROL must not change any settings, join or split conference members * during process of data. * * HDLC: * * It works quite the same as transparent, except that HDLC data is forwarded * to all other conference members if no hardware bridging is possible. * Send data will be writte to sendq. Sendq will be sent if confirm is received. * Conference cannot join, if one member is not hdlc. * */ #include <linux/delay.h> #include <linux/gfp.h> #include <linux/mISDNif.h> #include <linux/mISDNdsp.h> #include <linux/module.h> #include <linux/vmalloc.h> #include "core.h" #include "dsp.h" static const char *mISDN_dsp_revision = "2.0"; static int debug; static int options; static int poll; static int dtmfthreshold = 100; MODULE_AUTHOR("Andreas Eversberg"); module_param(debug, uint, S_IRUGO | S_IWUSR); module_param(options, uint, S_IRUGO | S_IWUSR); module_param(poll, uint, S_IRUGO | S_IWUSR); module_param(dtmfthreshold, uint, S_IRUGO | S_IWUSR); MODULE_LICENSE("GPL"); /*int spinnest = 0;*/ spinlock_t dsp_lock; /* global dsp lock */ struct list_head dsp_ilist; struct list_head conf_ilist; int dsp_debug; int dsp_options; int dsp_poll, dsp_tics; /* check if rx may be turned off or must be turned on */ static void dsp_rx_off_member(struct dsp *dsp) { <------>struct mISDN_ctrl_req cq; <------>int rx_off = 1; <------>memset(&cq, 0, sizeof(cq)); <------>if (!dsp->features_rx_off) <------><------>return; <------>/* not disabled */ <------>if (!dsp->rx_disabled) <------><------>rx_off = 0; <------>/* software dtmf */ <------>else if (dsp->dtmf.software) <------><------>rx_off = 0; <------>/* echo in software */ <------>else if (dsp->echo.software) <------><------>rx_off = 0; <------>/* bridge in software */ <------>else if (dsp->conf && dsp->conf->software) <------><------>rx_off = 0; <------>/* data is not required by user space and not required <------> * for echo dtmf detection, soft-echo, soft-bridging */ <------>if (rx_off == dsp->rx_is_off) <------><------>return; <------>if (!dsp->ch.peer) { <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: no peer, no rx_off\n", <------><------><------> __func__); <------><------>return; <------>} <------>cq.op = MISDN_CTRL_RX_OFF; <------>cq.p1 = rx_off; <------>if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { <------><------>printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", <------><------> __func__); <------><------>return; <------>} <------>dsp->rx_is_off = rx_off; <------>if (dsp_debug & DEBUG_DSP_CORE) <------><------>printk(KERN_DEBUG "%s: %s set rx_off = %d\n", <------><------> __func__, dsp->name, rx_off); } static void dsp_rx_off(struct dsp *dsp) { <------>struct dsp_conf_member *member; <------>if (dsp_options & DSP_OPT_NOHARDWARE) <------><------>return; <------>/* no conf */ <------>if (!dsp->conf) { <------><------>dsp_rx_off_member(dsp); <------><------>return; <------>} <------>/* check all members in conf */ <------>list_for_each_entry(member, &dsp->conf->mlist, list) { <------><------>dsp_rx_off_member(member->dsp); <------>} } /* enable "fill empty" feature */ static void dsp_fill_empty(struct dsp *dsp) { <------>struct mISDN_ctrl_req cq; <------>memset(&cq, 0, sizeof(cq)); <------>if (!dsp->ch.peer) { <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: no peer, no fill_empty\n", <------><------><------> __func__); <------><------>return; <------>} <------>cq.op = MISDN_CTRL_FILL_EMPTY; <------>cq.p1 = 1; <------>cq.p2 = dsp_silence; <------>if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { <------><------>printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", <------><------> __func__); <------><------>return; <------>} <------>if (dsp_debug & DEBUG_DSP_CORE) <------><------>printk(KERN_DEBUG "%s: %s set fill_empty = 1\n", <------><------> __func__, dsp->name); } static int dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb) { <------>struct sk_buff *nskb; <------>int ret = 0; <------>int cont; <------>u8 *data; <------>int len; <------>if (skb->len < sizeof(int)) { <------><------>printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__); <------><------>return -EINVAL; <------>} <------>cont = *((int *)skb->data); <------>len = skb->len - sizeof(int); <------>data = skb->data + sizeof(int); <------>switch (cont) { <------>case DTMF_TONE_START: /* turn on DTMF */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: start dtmf\n", __func__); <------><------>if (len == sizeof(int)) { <------><------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------><------>printk(KERN_NOTICE "changing DTMF Threshold " <------><------><------><------> "to %d\n", *((int *)data)); <------><------><------>dsp->dtmf.treshold = (*(int *)data) * 10000; <------><------>} <------><------>dsp->dtmf.enable = 1; <------><------>/* init goertzel */ <------><------>dsp_dtmf_goertzel_init(dsp); <------><------>/* check dtmf hardware */ <------><------>dsp_dtmf_hardware(dsp); <------><------>dsp_rx_off(dsp); <------><------>break; <------>case DTMF_TONE_STOP: /* turn off DTMF */ <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: stop dtmf\n", __func__); <------><------>dsp->dtmf.enable = 0; <------><------>dsp->dtmf.hardware = 0; <------><------>dsp->dtmf.software = 0; <------><------>break; <------>case DSP_CONF_JOIN: /* join / update conference */ <------><------>if (len < sizeof(int)) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (*((u32 *)data) == 0) <------><------><------>goto conf_split; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: join conference %d\n", <------><------><------> __func__, *((u32 *)data)); <------><------>ret = dsp_cmx_conf(dsp, *((u32 *)data)); <------><------>/* dsp_cmx_hardware will also be called here */ <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_CONF_SPLIT: /* remove from conference */ <------>conf_split: <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: release conference\n", __func__); <------><------>ret = dsp_cmx_conf(dsp, 0); <------><------>/* dsp_cmx_hardware will also be called here */ <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>dsp_rx_off(dsp); <------><------>break; <------>case DSP_TONE_PATT_ON: /* play tone */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (len < sizeof(int)) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: turn tone 0x%x on\n", <------><------><------> __func__, *((int *)skb->data)); <------><------>ret = dsp_tone(dsp, *((int *)data)); <------><------>if (!ret) { <------><------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------><------>dsp_rx_off(dsp); <------><------>} <------><------>if (!dsp->tone.tone) <------><------><------>goto tone_off; <------><------>break; <------>case DSP_TONE_PATT_OFF: /* stop tone */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: turn tone off\n", __func__); <------><------>dsp_tone(dsp, 0); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>/* reset tx buffers (user space data) */ <------>tone_off: <------><------>dsp->rx_W = 0; <------><------>dsp->rx_R = 0; <------><------>break; <------>case DSP_VOL_CHANGE_TX: /* change volume */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (len < sizeof(int)) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>dsp->tx_volume = *((int *)data); <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: change tx vol to %d\n", <------><------><------> __func__, dsp->tx_volume); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_dtmf_hardware(dsp); <------><------>dsp_rx_off(dsp); <------><------>break; <------>case DSP_VOL_CHANGE_RX: /* change volume */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (len < sizeof(int)) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>dsp->rx_volume = *((int *)data); <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: change rx vol to %d\n", <------><------><------> __func__, dsp->tx_volume); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_dtmf_hardware(dsp); <------><------>dsp_rx_off(dsp); <------><------>break; <------>case DSP_ECHO_ON: /* enable echo */ <------><------>dsp->echo.software = 1; /* soft echo */ <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_ECHO_OFF: /* disable echo */ <------><------>dsp->echo.software = 0; <------><------>dsp->echo.hardware = 0; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_RECEIVE_ON: /* enable receive to user space */ <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: enable receive to user " <------><------><------> "space\n", __func__); <------><------>dsp->rx_disabled = 0; <------><------>dsp_rx_off(dsp); <------><------>break; <------>case DSP_RECEIVE_OFF: /* disable receive to user space */ <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: disable receive to " <------><------><------> "user space\n", __func__); <------><------>dsp->rx_disabled = 1; <------><------>dsp_rx_off(dsp); <------><------>break; <------>case DSP_MIX_ON: /* enable mixing of tx data */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: enable mixing of " <------><------><------> "tx-data with conf members\n", __func__); <------><------>dsp->tx_mix = 1; <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_MIX_OFF: /* disable mixing of tx data */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: disable mixing of " <------><------><------> "tx-data with conf members\n", __func__); <------><------>dsp->tx_mix = 0; <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_TXDATA_ON: /* enable txdata */ <------><------>dsp->tx_data = 1; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: enable tx-data\n", __func__); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_TXDATA_OFF: /* disable txdata */ <------><------>dsp->tx_data = 0; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: disable tx-data\n", __func__); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>if (dsp_debug & DEBUG_DSP_CMX) <------><------><------>dsp_cmx_debug(dsp); <------><------>break; <------>case DSP_DELAY: /* use delay algorithm instead of dynamic <------><------><------> jitter algorithm */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (len < sizeof(int)) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>dsp->cmx_delay = (*((int *)data)) << 3; <------><------>/* milliseconds to samples */ <------><------>if (dsp->cmx_delay >= (CMX_BUFF_HALF >> 1)) <------><------><------>/* clip to half of maximum usable buffer <------><------><------> (half of half buffer) */ <------><------><------>dsp->cmx_delay = (CMX_BUFF_HALF >> 1) - 1; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: use delay algorithm to " <------><------><------> "compensate jitter (%d samples)\n", <------><------><------> __func__, dsp->cmx_delay); <------><------>break; <------>case DSP_JITTER: /* use dynamic jitter algorithm instead of <------><------><------> delay algorithm */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>dsp->cmx_delay = 0; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: use jitter algorithm to " <------><------><------> "compensate jitter\n", __func__); <------><------>break; <------>case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>dsp->tx_dejitter = 1; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: use dejitter on TX " <------><------><------> "buffer\n", __func__); <------><------>break; <------>case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>dsp->tx_dejitter = 0; <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: use TX buffer without " <------><------><------> "dejittering\n", __func__); <------><------>break; <------>case DSP_PIPELINE_CFG: <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (len > 0 && ((char *)data)[len - 1]) { <------><------><------>printk(KERN_DEBUG "%s: pipeline config string " <------><------><------> "is not NULL terminated!\n", __func__); <------><------><------>ret = -EINVAL; <------><------>} else { <------><------><------>dsp->pipeline.inuse = 1; <------><------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------><------>ret = dsp_pipeline_build(&dsp->pipeline, <------><------><------><------><------><------> len > 0 ? data : NULL); <------><------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------><------>dsp_rx_off(dsp); <------><------>} <------><------>break; <------>case DSP_BF_ENABLE_KEY: /* turn blowfish on */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (len < 4 || len > 56) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: turn blowfish on (key " <------><------><------> "not shown)\n", __func__); <------><------>ret = dsp_bf_init(dsp, (u8 *)data, len); <------><------>/* set new cont */ <------><------>if (!ret) <------><------><------>cont = DSP_BF_ACCEPT; <------><------>else <------><------><------>cont = DSP_BF_REJECT; <------><------>/* send indication if it worked to set it */ <------><------>nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY, <------><------><------><------><------>sizeof(int), &cont, GFP_ATOMIC); <------><------>if (nskb) { <------><------><------>if (dsp->up) { <------><------><------><------>if (dsp->up->send(dsp->up, nskb)) <------><------><------><------><------>dev_kfree_skb(nskb); <------><------><------>} else <------><------><------><------>dev_kfree_skb(nskb); <------><------>} <------><------>if (!ret) { <------><------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------><------>dsp_dtmf_hardware(dsp); <------><------><------>dsp_rx_off(dsp); <------><------>} <------><------>break; <------>case DSP_BF_DISABLE: /* turn blowfish off */ <------><------>if (dsp->hdlc) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: turn blowfish off\n", __func__); <------><------>dsp_bf_cleanup(dsp); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_dtmf_hardware(dsp); <------><------>dsp_rx_off(dsp); <------><------>break; <------>default: <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: ctrl req %x unhandled\n", <------><------><------> __func__, cont); <------><------>ret = -EINVAL; <------>} <------>return ret; } static void get_features(struct mISDNchannel *ch) { <------>struct dsp *dsp = container_of(ch, struct dsp, ch); <------>struct mISDN_ctrl_req cq; <------>if (!ch->peer) { <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: no peer, no features\n", <------><------><------> __func__); <------><------>return; <------>} <------>memset(&cq, 0, sizeof(cq)); <------>cq.op = MISDN_CTRL_GETOP; <------>if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) { <------><------>printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", <------><------> __func__); <------><------>return; <------>} <------>if (cq.op & MISDN_CTRL_RX_OFF) <------><------>dsp->features_rx_off = 1; <------>if (cq.op & MISDN_CTRL_FILL_EMPTY) <------><------>dsp->features_fill_empty = 1; <------>if (dsp_options & DSP_OPT_NOHARDWARE) <------><------>return; <------>if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) { <------><------>cq.op = MISDN_CTRL_HW_FEATURES; <------><------>*((u_long *)&cq.p1) = (u_long)&dsp->features; <------><------>if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) { <------><------><------>printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", <------><------><------> __func__); <------><------>} <------>} else <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: features not supported for %s\n", <------><------><------> __func__, dsp->name); } static int dsp_function(struct mISDNchannel *ch, struct sk_buff *skb) { <------>struct dsp *dsp = container_of(ch, struct dsp, ch); <------>struct mISDNhead *hh; <------>int ret = 0; <------>u8 *digits = NULL; <------>u_long flags; <------>hh = mISDN_HEAD_P(skb); <------>switch (hh->prim) { <------><------>/* FROM DOWN */ <------>case (PH_DATA_CNF): <------><------>dsp->data_pending = 0; <------><------>/* trigger next hdlc frame, if any */ <------><------>if (dsp->hdlc) { <------><------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------><------>if (dsp->b_active) <------><------><------><------>schedule_work(&dsp->workq); <------><------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>} <------><------>break; <------>case (PH_DATA_IND): <------>case (DL_DATA_IND): <------><------>if (skb->len < 1) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp->rx_is_off) { <------><------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------><------>printk(KERN_DEBUG "%s: rx-data during rx_off" <------><------><------><------> " for %s\n", <------><------><------><------> __func__, dsp->name); <------><------>} <------><------>if (dsp->hdlc) { <------><------><------>/* hdlc */ <------><------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------><------>dsp_cmx_hdlc(dsp, skb); <------><------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------><------>if (dsp->rx_disabled) { <------><------><------><------>/* if receive is not allowed */ <------><------><------><------>break; <------><------><------>} <------><------><------>hh->prim = DL_DATA_IND; <------><------><------>if (dsp->up) <------><------><------><------>return dsp->up->send(dsp->up, skb); <------><------><------>break; <------><------>} <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>/* decrypt if enabled */ <------><------>if (dsp->bf_enable) <------><------><------>dsp_bf_decrypt(dsp, skb->data, skb->len); <------><------>/* pipeline */ <------><------>if (dsp->pipeline.inuse) <------><------><------>dsp_pipeline_process_rx(&dsp->pipeline, skb->data, <------><------><------><------><------><------>skb->len, hh->id); <------><------>/* change volume if requested */ <------><------>if (dsp->rx_volume) <------><------><------>dsp_change_volume(skb, dsp->rx_volume); <------><------>/* check if dtmf soft decoding is turned on */ <------><------>if (dsp->dtmf.software) { <------><------><------>digits = dsp_dtmf_goertzel_decode(dsp, skb->data, <------><------><------><------><------><------><------> skb->len, (dsp_options & DSP_OPT_ULAW) ? 1 : 0); <------><------>} <------><------>/* we need to process receive data if software */ <------><------>if (dsp->conf && dsp->conf->software) { <------><------><------>/* process data from card at cmx */ <------><------><------>dsp_cmx_receive(dsp, skb); <------><------>} <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>/* send dtmf result, if any */ <------><------>if (digits) { <------><------><------>while (*digits) { <------><------><------><------>int k; <------><------><------><------>struct sk_buff *nskb; <------><------><------><------>if (dsp_debug & DEBUG_DSP_DTMF) <------><------><------><------><------>printk(KERN_DEBUG "%s: digit" <------><------><------><------><------> "(%c) to layer %s\n", <------><------><------><------><------> __func__, *digits, dsp->name); <------><------><------><------>k = *digits | DTMF_TONE_VAL; <------><------><------><------>nskb = _alloc_mISDN_skb(PH_CONTROL_IND, <------><------><------><------><------><------><------>MISDN_ID_ANY, sizeof(int), &k, <------><------><------><------><------><------><------>GFP_ATOMIC); <------><------><------><------>if (nskb) { <------><------><------><------><------>if (dsp->up) { <------><------><------><------><------><------>if (dsp->up->send( <------><------><------><------><------><------><------> dsp->up, nskb)) <------><------><------><------><------><------><------>dev_kfree_skb(nskb); <------><------><------><------><------>} else <------><------><------><------><------><------>dev_kfree_skb(nskb); <------><------><------><------>} <------><------><------><------>digits++; <------><------><------>} <------><------>} <------><------>if (dsp->rx_disabled) { <------><------><------>/* if receive is not allowed */ <------><------><------>break; <------><------>} <------><------>hh->prim = DL_DATA_IND; <------><------>if (dsp->up) <------><------><------>return dsp->up->send(dsp->up, skb); <------><------>break; <------>case (PH_CONTROL_IND): <------><------>if (dsp_debug & DEBUG_DSP_DTMFCOEFF) <------><------><------>printk(KERN_DEBUG "%s: PH_CONTROL INDICATION " <------><------><------> "received: %x (len %d) %s\n", __func__, <------><------><------> hh->id, skb->len, dsp->name); <------><------>switch (hh->id) { <------><------>case (DTMF_HFC_COEF): /* getting coefficients */ <------><------><------>if (!dsp->dtmf.hardware) { <------><------><------><------>if (dsp_debug & DEBUG_DSP_DTMFCOEFF) <------><------><------><------><------>printk(KERN_DEBUG "%s: ignoring DTMF " <------><------><------><------><------> "coefficients from HFC\n", <------><------><------><------><------> __func__); <------><------><------><------>break; <------><------><------>} <------><------><------>digits = dsp_dtmf_goertzel_decode(dsp, skb->data, <------><------><------><------><------><------><------> skb->len, 2); <------><------><------>while (*digits) { <------><------><------><------>int k; <------><------><------><------>struct sk_buff *nskb; <------><------><------><------>if (dsp_debug & DEBUG_DSP_DTMF) <------><------><------><------><------>printk(KERN_DEBUG "%s: digit" <------><------><------><------><------> "(%c) to layer %s\n", <------><------><------><------><------> __func__, *digits, dsp->name); <------><------><------><------>k = *digits | DTMF_TONE_VAL; <------><------><------><------>nskb = _alloc_mISDN_skb(PH_CONTROL_IND, <------><------><------><------><------><------><------>MISDN_ID_ANY, sizeof(int), &k, <------><------><------><------><------><------><------>GFP_ATOMIC); <------><------><------><------>if (nskb) { <------><------><------><------><------>if (dsp->up) { <------><------><------><------><------><------>if (dsp->up->send( <------><------><------><------><------><------><------> dsp->up, nskb)) <------><------><------><------><------><------><------>dev_kfree_skb(nskb); <------><------><------><------><------>} else <------><------><------><------><------><------>dev_kfree_skb(nskb); <------><------><------><------>} <------><------><------><------>digits++; <------><------><------>} <------><------><------>break; <------><------>case (HFC_VOL_CHANGE_TX): /* change volume */ <------><------><------>if (skb->len != sizeof(int)) { <------><------><------><------>ret = -EINVAL; <------><------><------><------>break; <------><------><------>} <------><------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------><------>dsp->tx_volume = *((int *)skb->data); <------><------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------><------>printk(KERN_DEBUG "%s: change tx volume to " <------><------><------><------> "%d\n", __func__, dsp->tx_volume); <------><------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------><------>dsp_dtmf_hardware(dsp); <------><------><------>dsp_rx_off(dsp); <------><------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------><------>break; <------><------>default: <------><------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------><------>printk(KERN_DEBUG "%s: ctrl ind %x unhandled " <------><------><------><------> "%s\n", __func__, hh->id, dsp->name); <------><------><------>ret = -EINVAL; <------><------>} <------><------>break; <------>case (PH_ACTIVATE_IND): <------>case (PH_ACTIVATE_CNF): <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: b_channel is now active %s\n", <------><------><------> __func__, dsp->name); <------><------>/* bchannel now active */ <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>dsp->b_active = 1; <------><------>dsp->data_pending = 0; <------><------>dsp->rx_init = 1; <------><------>/* rx_W and rx_R will be adjusted on first frame */ <------><------>dsp->rx_W = 0; <------><------>dsp->rx_R = 0; <------><------>memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff)); <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_dtmf_hardware(dsp); <------><------>dsp_rx_off(dsp); <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: done with activation, sending " <------><------><------> "confirm to user space. %s\n", __func__, <------><------><------> dsp->name); <------><------>/* send activation to upper layer */ <------><------>hh->prim = DL_ESTABLISH_CNF; <------><------>if (dsp->up) <------><------><------>return dsp->up->send(dsp->up, skb); <------><------>break; <------>case (PH_DEACTIVATE_IND): <------>case (PH_DEACTIVATE_CNF): <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: b_channel is now inactive %s\n", <------><------><------> __func__, dsp->name); <------><------>/* bchannel now inactive */ <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>dsp->b_active = 0; <------><------>dsp->data_pending = 0; <------><------>dsp_cmx_hardware(dsp->conf, dsp); <------><------>dsp_rx_off(dsp); <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>hh->prim = DL_RELEASE_CNF; <------><------>if (dsp->up) <------><------><------>return dsp->up->send(dsp->up, skb); <------><------>break; <------><------>/* FROM UP */ <------>case (DL_DATA_REQ): <------>case (PH_DATA_REQ): <------><------>if (skb->len < 1) { <------><------><------>ret = -EINVAL; <------><------><------>break; <------><------>} <------><------>if (dsp->hdlc) { <------><------><------>/* hdlc */ <------><------><------>if (!dsp->b_active) { <------><------><------><------>ret = -EIO; <------><------><------><------>break; <------><------><------>} <------><------><------>hh->prim = PH_DATA_REQ; <------><------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------><------>skb_queue_tail(&dsp->sendq, skb); <------><------><------>schedule_work(&dsp->workq); <------><------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------><------>return 0; <------><------>} <------><------>/* send data to tx-buffer (if no tone is played) */ <------><------>if (!dsp->tone.tone) { <------><------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------><------>dsp_cmx_transmit(dsp, skb); <------><------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>} <------><------>break; <------>case (PH_CONTROL_REQ): <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>ret = dsp_control_req(dsp, hh, skb); <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>break; <------>case (DL_ESTABLISH_REQ): <------>case (PH_ACTIVATE_REQ): <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: activating b_channel %s\n", <------><------><------> __func__, dsp->name); <------><------>if (dsp->dtmf.hardware || dsp->dtmf.software) <------><------><------>dsp_dtmf_goertzel_init(dsp); <------><------>get_features(ch); <------><------>/* enable fill_empty feature */ <------><------>if (dsp->features_fill_empty) <------><------><------>dsp_fill_empty(dsp); <------><------>/* send ph_activate */ <------><------>hh->prim = PH_ACTIVATE_REQ; <------><------>if (ch->peer) <------><------><------>return ch->recv(ch->peer, skb); <------><------>break; <------>case (DL_RELEASE_REQ): <------>case (PH_DEACTIVATE_REQ): <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: releasing b_channel %s\n", <------><------><------> __func__, dsp->name); <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>dsp->tone.tone = 0; <------><------>dsp->tone.hardware = 0; <------><------>dsp->tone.software = 0; <------><------>if (timer_pending(&dsp->tone.tl)) <------><------><------>del_timer(&dsp->tone.tl); <------><------>if (dsp->conf) <------><------><------>dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be <------><------><------><------><------><------> called here */ <------><------>skb_queue_purge(&dsp->sendq); <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>hh->prim = PH_DEACTIVATE_REQ; <------><------>if (ch->peer) <------><------><------>return ch->recv(ch->peer, skb); <------><------>break; <------>default: <------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------>printk(KERN_DEBUG "%s: msg %x unhandled %s\n", <------><------><------> __func__, hh->prim, dsp->name); <------><------>ret = -EINVAL; <------>} <------>if (!ret) <------><------>dev_kfree_skb(skb); <------>return ret; } static int dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) { <------>struct dsp *dsp = container_of(ch, struct dsp, ch); <------>u_long flags; <------>int err = 0; <------>if (debug & DEBUG_DSP_CTRL) <------><------>printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); <------>switch (cmd) { <------>case OPEN_CHANNEL: <------><------>break; <------>case CLOSE_CHANNEL: <------><------>if (dsp->ch.peer) <------><------><------>dsp->ch.peer->ctrl(dsp->ch.peer, CLOSE_CHANNEL, NULL); <------><------>/* wait until workqueue has finished, <------><------> * must lock here, or we may hit send-process currently <------><------> * queueing. */ <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>dsp->b_active = 0; <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>/* MUST not be locked, because it waits until queue is done. */ <------><------>cancel_work_sync(&dsp->workq); <------><------>spin_lock_irqsave(&dsp_lock, flags); <------><------>if (timer_pending(&dsp->tone.tl)) <------><------><------>del_timer(&dsp->tone.tl); <------><------>skb_queue_purge(&dsp->sendq); <------><------>if (dsp_debug & DEBUG_DSP_CTRL) <------><------><------>printk(KERN_DEBUG "%s: releasing member %s\n", <------><------><------> __func__, dsp->name); <------><------>dsp->b_active = 0; <------><------>dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be called <------><------><------><------><------> here */ <------><------>dsp_pipeline_destroy(&dsp->pipeline); <------><------>if (dsp_debug & DEBUG_DSP_CTRL) <------><------><------>printk(KERN_DEBUG "%s: remove & destroy object %s\n", <------><------><------> __func__, dsp->name); <------><------>list_del(&dsp->list); <------><------>spin_unlock_irqrestore(&dsp_lock, flags); <------><------>if (dsp_debug & DEBUG_DSP_CTRL) <------><------><------>printk(KERN_DEBUG "%s: dsp instance released\n", <------><------><------> __func__); <------><------>vfree(dsp); <------><------>module_put(THIS_MODULE); <------><------>break; <------>} <------>return err; } static void dsp_send_bh(struct work_struct *work) { <------>struct dsp *dsp = container_of(work, struct dsp, workq); <------>struct sk_buff *skb; <------>struct mISDNhead *hh; <------>if (dsp->hdlc && dsp->data_pending) <------><------>return; /* wait until data has been acknowledged */ <------>/* send queued data */ <------>while ((skb = skb_dequeue(&dsp->sendq))) { <------><------>/* in locked date, we must have still data in queue */ <------><------>if (dsp->data_pending) { <------><------><------>if (dsp_debug & DEBUG_DSP_CORE) <------><------><------><------>printk(KERN_DEBUG "%s: fifo full %s, this is " <------><------><------><------> "no bug!\n", __func__, dsp->name); <------><------><------>/* flush transparent data, if not acked */ <------><------><------>dev_kfree_skb(skb); <------><------><------>continue; <------><------>} <------><------>hh = mISDN_HEAD_P(skb); <------><------>if (hh->prim == DL_DATA_REQ) { <------><------><------>/* send packet up */ <------><------><------>if (dsp->up) { <------><------><------><------>if (dsp->up->send(dsp->up, skb)) <------><------><------><------><------>dev_kfree_skb(skb); <------><------><------>} else <------><------><------><------>dev_kfree_skb(skb); <------><------>} else { <------><------><------>/* send packet down */ <------><------><------>if (dsp->ch.peer) { <------><------><------><------>dsp->data_pending = 1; <------><------><------><------>if (dsp->ch.recv(dsp->ch.peer, skb)) { <------><------><------><------><------>dev_kfree_skb(skb); <------><------><------><------><------>dsp->data_pending = 0; <------><------><------><------>} <------><------><------>} else <------><------><------><------>dev_kfree_skb(skb); <------><------>} <------>} } static int dspcreate(struct channel_req *crq) { <------>struct dsp *ndsp; <------>u_long flags; <------>if (crq->protocol != ISDN_P_B_L2DSP <------> && crq->protocol != ISDN_P_B_L2DSPHDLC) <------><------>return -EPROTONOSUPPORT; <------>ndsp = vzalloc(sizeof(struct dsp)); <------>if (!ndsp) { <------><------>printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__); <------><------>return -ENOMEM; <------>} <------>if (dsp_debug & DEBUG_DSP_CTRL) <------><------>printk(KERN_DEBUG "%s: creating new dsp instance\n", __func__); <------>/* default enabled */ <------>INIT_WORK(&ndsp->workq, (void *)dsp_send_bh); <------>skb_queue_head_init(&ndsp->sendq); <------>ndsp->ch.send = dsp_function; <------>ndsp->ch.ctrl = dsp_ctrl; <------>ndsp->up = crq->ch; <------>crq->ch = &ndsp->ch; <------>if (crq->protocol == ISDN_P_B_L2DSP) { <------><------>crq->protocol = ISDN_P_B_RAW; <------><------>ndsp->hdlc = 0; <------>} else { <------><------>crq->protocol = ISDN_P_B_HDLC; <------><------>ndsp->hdlc = 1; <------>} <------>if (!try_module_get(THIS_MODULE)) <------><------>printk(KERN_WARNING "%s:cannot get module\n", <------><------> __func__); <------>sprintf(ndsp->name, "DSP_C%x(0x%p)", <------><------>ndsp->up->st->dev->id + 1, ndsp); <------>/* set frame size to start */ <------>ndsp->features.hfc_id = -1; /* current PCM id */ <------>ndsp->features.pcm_id = -1; /* current PCM id */ <------>ndsp->pcm_slot_rx = -1; /* current CPM slot */ <------>ndsp->pcm_slot_tx = -1; <------>ndsp->pcm_bank_rx = -1; <------>ndsp->pcm_bank_tx = -1; <------>ndsp->hfc_conf = -1; /* current conference number */ <------>/* set tone timer */ <------>timer_setup(&ndsp->tone.tl, dsp_tone_timeout, 0); <------>if (dtmfthreshold < 20 || dtmfthreshold > 500) <------><------>dtmfthreshold = 200; <------>ndsp->dtmf.treshold = dtmfthreshold * 10000; <------>/* init pipeline append to list */ <------>spin_lock_irqsave(&dsp_lock, flags); <------>dsp_pipeline_init(&ndsp->pipeline); <------>list_add_tail(&ndsp->list, &dsp_ilist); <------>spin_unlock_irqrestore(&dsp_lock, flags); <------>return 0; } static struct Bprotocol DSP = { <------>.Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK)) <------>| (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)), <------>.name = "dsp", <------>.create = dspcreate }; static int __init dsp_init(void) { <------>int err; <------>int tics; <------>printk(KERN_INFO "DSP module %s\n", mISDN_dsp_revision); <------>dsp_options = options; <------>dsp_debug = debug; <------>/* set packet size */ <------>dsp_poll = poll; <------>if (dsp_poll) { <------><------>if (dsp_poll > MAX_POLL) { <------><------><------>printk(KERN_ERR "%s: Wrong poll value (%d), use %d " <------><------><------> "maximum.\n", __func__, poll, MAX_POLL); <------><------><------>err = -EINVAL; <------><------><------>return err; <------><------>} <------><------>if (dsp_poll < 8) { <------><------><------>printk(KERN_ERR "%s: Wrong poll value (%d), use 8 " <------><------><------> "minimum.\n", __func__, dsp_poll); <------><------><------>err = -EINVAL; <------><------><------>return err; <------><------>} <------><------>dsp_tics = poll * HZ / 8000; <------><------>if (dsp_tics * 8000 != poll * HZ) { <------><------><------>printk(KERN_INFO "mISDN_dsp: Cannot clock every %d " <------><------><------> "samples (0,125 ms). It is not a multiple of " <------><------><------> "%d HZ.\n", poll, HZ); <------><------><------>err = -EINVAL; <------><------><------>return err; <------><------>} <------>} else { <------><------>poll = 8; <------><------>while (poll <= MAX_POLL) { <------><------><------>tics = (poll * HZ) / 8000; <------><------><------>if (tics * 8000 == poll * HZ) { <------><------><------><------>dsp_tics = tics; <------><------><------><------>dsp_poll = poll; <------><------><------><------>if (poll >= 64) <------><------><------><------><------>break; <------><------><------>} <------><------><------>poll++; <------><------>} <------>} <------>if (dsp_poll == 0) { <------><------>printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel " <------><------> "clock that equals exactly the duration of 8-256 " <------><------> "samples. (Choose kernel clock speed like 100, 250, " <------><------> "300, 1000)\n"); <------><------>err = -EINVAL; <------><------>return err; <------>} <------>printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals " <------> "%d jiffies.\n", dsp_poll, dsp_tics); <------>spin_lock_init(&dsp_lock); <------>INIT_LIST_HEAD(&dsp_ilist); <------>INIT_LIST_HEAD(&conf_ilist); <------>/* init conversion tables */ <------>dsp_audio_generate_law_tables(); <------>dsp_silence = (dsp_options & DSP_OPT_ULAW) ? 0xff : 0x2a; <------>dsp_audio_law_to_s32 = (dsp_options & DSP_OPT_ULAW) ? <------><------>dsp_audio_ulaw_to_s32 : dsp_audio_alaw_to_s32; <------>dsp_audio_generate_s2law_table(); <------>dsp_audio_generate_seven(); <------>dsp_audio_generate_mix_table(); <------>if (dsp_options & DSP_OPT_ULAW) <------><------>dsp_audio_generate_ulaw_samples(); <------>dsp_audio_generate_volume_changes(); <------>err = dsp_pipeline_module_init(); <------>if (err) { <------><------>printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, " <------><------> "error(%d)\n", err); <------><------>return err; <------>} <------>err = mISDN_register_Bprotocol(&DSP); <------>if (err) { <------><------>printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err); <------><------>return err; <------>} <------>/* set sample timer */ <------>timer_setup(&dsp_spl_tl, (void *)dsp_cmx_send, 0); <------>dsp_spl_tl.expires = jiffies + dsp_tics; <------>dsp_spl_jiffies = dsp_spl_tl.expires; <------>add_timer(&dsp_spl_tl); <------>return 0; } static void __exit dsp_cleanup(void) { <------>mISDN_unregister_Bprotocol(&DSP); <------>del_timer_sync(&dsp_spl_tl); <------>if (!list_empty(&dsp_ilist)) { <------><------>printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not " <------><------> "empty.\n"); <------>} <------>if (!list_empty(&conf_ilist)) { <------><------>printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not " <------><------> "all memory freed.\n"); <------>} <------>dsp_pipeline_module_exit(); } module_init(dsp_init); module_exit(dsp_cleanup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags
| Donate