From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- sound/core/seq/seq_midi_emul.c | 723 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 723 insertions(+) create mode 100644 sound/core/seq/seq_midi_emul.c (limited to 'sound/core/seq/seq_midi_emul.c') diff --git a/sound/core/seq/seq_midi_emul.c b/sound/core/seq/seq_midi_emul.c new file mode 100644 index 000000000..81d2ef5e5 --- /dev/null +++ b/sound/core/seq/seq_midi_emul.c @@ -0,0 +1,723 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * GM/GS/XG midi module. + * + * Copyright (C) 1999 Steve Ratcliffe + * + * Based on awe_wave.c by Takashi Iwai + */ +/* + * This module is used to keep track of the current midi state. + * It can be used for drivers that are required to emulate midi when + * the hardware doesn't. + * + * It was written for a AWE64 driver, but there should be no AWE specific + * code in here. If there is it should be reported as a bug. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Takashi Iwai / Steve Ratcliffe"); +MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI emulation."); +MODULE_LICENSE("GPL"); + +/* Prototypes for static functions */ +static void note_off(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel *chan, + int note, int vel); +static void do_control(const struct snd_midi_op *ops, void *private, + struct snd_midi_channel_set *chset, + struct snd_midi_channel *chan, + int control, int value); +static void rpn(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel *chan, + struct snd_midi_channel_set *chset); +static void nrpn(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel *chan, + struct snd_midi_channel_set *chset); +static void sysex(const struct snd_midi_op *ops, void *private, + unsigned char *sysex, + int len, struct snd_midi_channel_set *chset); +static void all_sounds_off(const struct snd_midi_op *ops, void *private, + struct snd_midi_channel *chan); +static void all_notes_off(const struct snd_midi_op *ops, void *private, + struct snd_midi_channel *chan); +static void snd_midi_reset_controllers(struct snd_midi_channel *chan); +static void reset_all_channels(struct snd_midi_channel_set *chset); + + +/* + * Process an event in a driver independent way. This means dealing + * with RPN, NRPN, SysEx etc that are defined for common midi applications + * such as GM, GS and XG. + * There modes that this module will run in are: + * Generic MIDI - no interpretation at all, it will just save current values + * of controllers etc. + * GM - You can use all gm_ prefixed elements of chan. Controls, RPN, NRPN, + * SysEx will be interpreded as defined in General Midi. + * GS - You can use all gs_ prefixed elements of chan. Codes for GS will be + * interpreted. + * XG - You can use all xg_ prefixed elements of chan. Codes for XG will + * be interpreted. + */ +void +snd_midi_process_event(const struct snd_midi_op *ops, + struct snd_seq_event *ev, + struct snd_midi_channel_set *chanset) +{ + struct snd_midi_channel *chan; + void *drv; + int dest_channel = 0; + + if (ev == NULL || chanset == NULL) { + pr_debug("ALSA: seq_midi_emul: ev or chanbase NULL (snd_midi_process_event)\n"); + return; + } + if (chanset->channels == NULL) + return; + + if (snd_seq_ev_is_channel_type(ev)) { + dest_channel = ev->data.note.channel; + if (dest_channel >= chanset->max_channels) { + pr_debug("ALSA: seq_midi_emul: dest channel is %d, max is %d\n", + dest_channel, chanset->max_channels); + return; + } + } + + chan = chanset->channels + dest_channel; + drv = chanset->private_data; + + /* EVENT_NOTE should be processed before queued */ + if (ev->type == SNDRV_SEQ_EVENT_NOTE) + return; + + /* Make sure that we don't have a note on that should really be + * a note off */ + if (ev->type == SNDRV_SEQ_EVENT_NOTEON && ev->data.note.velocity == 0) + ev->type = SNDRV_SEQ_EVENT_NOTEOFF; + + /* Make sure the note is within array range */ + if (ev->type == SNDRV_SEQ_EVENT_NOTEON || + ev->type == SNDRV_SEQ_EVENT_NOTEOFF || + ev->type == SNDRV_SEQ_EVENT_KEYPRESS) { + if (ev->data.note.note >= 128) + return; + } + + switch (ev->type) { + case SNDRV_SEQ_EVENT_NOTEON: + if (chan->note[ev->data.note.note] & SNDRV_MIDI_NOTE_ON) { + if (ops->note_off) + ops->note_off(drv, ev->data.note.note, 0, chan); + } + chan->note[ev->data.note.note] = SNDRV_MIDI_NOTE_ON; + if (ops->note_on) + ops->note_on(drv, ev->data.note.note, ev->data.note.velocity, chan); + break; + case SNDRV_SEQ_EVENT_NOTEOFF: + if (! (chan->note[ev->data.note.note] & SNDRV_MIDI_NOTE_ON)) + break; + if (ops->note_off) + note_off(ops, drv, chan, ev->data.note.note, ev->data.note.velocity); + break; + case SNDRV_SEQ_EVENT_KEYPRESS: + if (ops->key_press) + ops->key_press(drv, ev->data.note.note, ev->data.note.velocity, chan); + break; + case SNDRV_SEQ_EVENT_CONTROLLER: + do_control(ops, drv, chanset, chan, + ev->data.control.param, ev->data.control.value); + break; + case SNDRV_SEQ_EVENT_PGMCHANGE: + chan->midi_program = ev->data.control.value; + break; + case SNDRV_SEQ_EVENT_PITCHBEND: + chan->midi_pitchbend = ev->data.control.value; + if (ops->control) + ops->control(drv, MIDI_CTL_PITCHBEND, chan); + break; + case SNDRV_SEQ_EVENT_CHANPRESS: + chan->midi_pressure = ev->data.control.value; + if (ops->control) + ops->control(drv, MIDI_CTL_CHAN_PRESSURE, chan); + break; + case SNDRV_SEQ_EVENT_CONTROL14: + /* Best guess is that this is any of the 14 bit controller values */ + if (ev->data.control.param < 32) { + /* set low part first */ + chan->control[ev->data.control.param + 32] = + ev->data.control.value & 0x7f; + do_control(ops, drv, chanset, chan, + ev->data.control.param, + ((ev->data.control.value>>7) & 0x7f)); + } else + do_control(ops, drv, chanset, chan, + ev->data.control.param, + ev->data.control.value); + break; + case SNDRV_SEQ_EVENT_NONREGPARAM: + /* Break it back into its controller values */ + chan->param_type = SNDRV_MIDI_PARAM_TYPE_NONREGISTERED; + chan->control[MIDI_CTL_MSB_DATA_ENTRY] + = (ev->data.control.value >> 7) & 0x7f; + chan->control[MIDI_CTL_LSB_DATA_ENTRY] + = ev->data.control.value & 0x7f; + chan->control[MIDI_CTL_NONREG_PARM_NUM_MSB] + = (ev->data.control.param >> 7) & 0x7f; + chan->control[MIDI_CTL_NONREG_PARM_NUM_LSB] + = ev->data.control.param & 0x7f; + nrpn(ops, drv, chan, chanset); + break; + case SNDRV_SEQ_EVENT_REGPARAM: + /* Break it back into its controller values */ + chan->param_type = SNDRV_MIDI_PARAM_TYPE_REGISTERED; + chan->control[MIDI_CTL_MSB_DATA_ENTRY] + = (ev->data.control.value >> 7) & 0x7f; + chan->control[MIDI_CTL_LSB_DATA_ENTRY] + = ev->data.control.value & 0x7f; + chan->control[MIDI_CTL_REGIST_PARM_NUM_MSB] + = (ev->data.control.param >> 7) & 0x7f; + chan->control[MIDI_CTL_REGIST_PARM_NUM_LSB] + = ev->data.control.param & 0x7f; + rpn(ops, drv, chan, chanset); + break; + case SNDRV_SEQ_EVENT_SYSEX: + if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE) { + unsigned char sysexbuf[64]; + int len; + len = snd_seq_expand_var_event(ev, sizeof(sysexbuf), sysexbuf, 1, 0); + if (len > 0) + sysex(ops, drv, sysexbuf, len, chanset); + } + break; + case SNDRV_SEQ_EVENT_SONGPOS: + case SNDRV_SEQ_EVENT_SONGSEL: + case SNDRV_SEQ_EVENT_CLOCK: + case SNDRV_SEQ_EVENT_START: + case SNDRV_SEQ_EVENT_CONTINUE: + case SNDRV_SEQ_EVENT_STOP: + case SNDRV_SEQ_EVENT_QFRAME: + case SNDRV_SEQ_EVENT_TEMPO: + case SNDRV_SEQ_EVENT_TIMESIGN: + case SNDRV_SEQ_EVENT_KEYSIGN: + goto not_yet; + case SNDRV_SEQ_EVENT_SENSING: + break; + case SNDRV_SEQ_EVENT_CLIENT_START: + case SNDRV_SEQ_EVENT_CLIENT_EXIT: + case SNDRV_SEQ_EVENT_CLIENT_CHANGE: + case SNDRV_SEQ_EVENT_PORT_START: + case SNDRV_SEQ_EVENT_PORT_EXIT: + case SNDRV_SEQ_EVENT_PORT_CHANGE: + case SNDRV_SEQ_EVENT_ECHO: + not_yet: + default: + /*pr_debug("ALSA: seq_midi_emul: Unimplemented event %d\n", ev->type);*/ + break; + } +} +EXPORT_SYMBOL(snd_midi_process_event); + + +/* + * release note + */ +static void +note_off(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel *chan, + int note, int vel) +{ + if (chan->gm_hold) { + /* Hold this note until pedal is turned off */ + chan->note[note] |= SNDRV_MIDI_NOTE_RELEASED; + } else if (chan->note[note] & SNDRV_MIDI_NOTE_SOSTENUTO) { + /* Mark this note as release; it will be turned off when sostenuto + * is turned off */ + chan->note[note] |= SNDRV_MIDI_NOTE_RELEASED; + } else { + chan->note[note] = 0; + if (ops->note_off) + ops->note_off(drv, note, vel, chan); + } +} + +/* + * Do all driver independent operations for this controller and pass + * events that need to take place immediately to the driver. + */ +static void +do_control(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel_set *chset, + struct snd_midi_channel *chan, int control, int value) +{ + int i; + + if (control >= ARRAY_SIZE(chan->control)) + return; + + /* Switches */ + if ((control >=64 && control <=69) || (control >= 80 && control <= 83)) { + /* These are all switches; either off or on so set to 0 or 127 */ + value = (value >= 64)? 127: 0; + } + chan->control[control] = value; + + switch (control) { + case MIDI_CTL_SUSTAIN: + if (value == 0) { + /* Sustain has been released, turn off held notes */ + for (i = 0; i < 128; i++) { + if (chan->note[i] & SNDRV_MIDI_NOTE_RELEASED) { + chan->note[i] = SNDRV_MIDI_NOTE_OFF; + if (ops->note_off) + ops->note_off(drv, i, 0, chan); + } + } + } + break; + case MIDI_CTL_PORTAMENTO: + break; + case MIDI_CTL_SOSTENUTO: + if (value) { + /* Mark each note that is currently held down */ + for (i = 0; i < 128; i++) { + if (chan->note[i] & SNDRV_MIDI_NOTE_ON) + chan->note[i] |= SNDRV_MIDI_NOTE_SOSTENUTO; + } + } else { + /* release all notes that were held */ + for (i = 0; i < 128; i++) { + if (chan->note[i] & SNDRV_MIDI_NOTE_SOSTENUTO) { + chan->note[i] &= ~SNDRV_MIDI_NOTE_SOSTENUTO; + if (chan->note[i] & SNDRV_MIDI_NOTE_RELEASED) { + chan->note[i] = SNDRV_MIDI_NOTE_OFF; + if (ops->note_off) + ops->note_off(drv, i, 0, chan); + } + } + } + } + break; + case MIDI_CTL_MSB_DATA_ENTRY: + chan->control[MIDI_CTL_LSB_DATA_ENTRY] = 0; + fallthrough; + case MIDI_CTL_LSB_DATA_ENTRY: + if (chan->param_type == SNDRV_MIDI_PARAM_TYPE_REGISTERED) + rpn(ops, drv, chan, chset); + else + nrpn(ops, drv, chan, chset); + break; + case MIDI_CTL_REGIST_PARM_NUM_LSB: + case MIDI_CTL_REGIST_PARM_NUM_MSB: + chan->param_type = SNDRV_MIDI_PARAM_TYPE_REGISTERED; + break; + case MIDI_CTL_NONREG_PARM_NUM_LSB: + case MIDI_CTL_NONREG_PARM_NUM_MSB: + chan->param_type = SNDRV_MIDI_PARAM_TYPE_NONREGISTERED; + break; + + case MIDI_CTL_ALL_SOUNDS_OFF: + all_sounds_off(ops, drv, chan); + break; + + case MIDI_CTL_ALL_NOTES_OFF: + all_notes_off(ops, drv, chan); + break; + + case MIDI_CTL_MSB_BANK: + if (chset->midi_mode == SNDRV_MIDI_MODE_XG) { + if (value == 127) + chan->drum_channel = 1; + else + chan->drum_channel = 0; + } + break; + case MIDI_CTL_LSB_BANK: + break; + + case MIDI_CTL_RESET_CONTROLLERS: + snd_midi_reset_controllers(chan); + break; + + case MIDI_CTL_SOFT_PEDAL: + case MIDI_CTL_LEGATO_FOOTSWITCH: + case MIDI_CTL_HOLD2: + case MIDI_CTL_SC1_SOUND_VARIATION: + case MIDI_CTL_SC2_TIMBRE: + case MIDI_CTL_SC3_RELEASE_TIME: + case MIDI_CTL_SC4_ATTACK_TIME: + case MIDI_CTL_SC5_BRIGHTNESS: + case MIDI_CTL_E1_REVERB_DEPTH: + case MIDI_CTL_E2_TREMOLO_DEPTH: + case MIDI_CTL_E3_CHORUS_DEPTH: + case MIDI_CTL_E4_DETUNE_DEPTH: + case MIDI_CTL_E5_PHASER_DEPTH: + goto notyet; + notyet: + default: + if (ops->control) + ops->control(drv, control, chan); + break; + } +} + + +/* + * initialize the MIDI status + */ +void +snd_midi_channel_set_clear(struct snd_midi_channel_set *chset) +{ + int i; + + chset->midi_mode = SNDRV_MIDI_MODE_GM; + chset->gs_master_volume = 127; + + for (i = 0; i < chset->max_channels; i++) { + struct snd_midi_channel *chan = chset->channels + i; + memset(chan->note, 0, sizeof(chan->note)); + + chan->midi_aftertouch = 0; + chan->midi_pressure = 0; + chan->midi_program = 0; + chan->midi_pitchbend = 0; + snd_midi_reset_controllers(chan); + chan->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ + chan->gm_rpn_fine_tuning = 0; + chan->gm_rpn_coarse_tuning = 0; + + if (i == 9) + chan->drum_channel = 1; + else + chan->drum_channel = 0; + } +} +EXPORT_SYMBOL(snd_midi_channel_set_clear); + +/* + * Process a rpn message. + */ +static void +rpn(const struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, + struct snd_midi_channel_set *chset) +{ + int type; + int val; + + if (chset->midi_mode != SNDRV_MIDI_MODE_NONE) { + type = (chan->control[MIDI_CTL_REGIST_PARM_NUM_MSB] << 8) | + chan->control[MIDI_CTL_REGIST_PARM_NUM_LSB]; + val = (chan->control[MIDI_CTL_MSB_DATA_ENTRY] << 7) | + chan->control[MIDI_CTL_LSB_DATA_ENTRY]; + + switch (type) { + case 0x0000: /* Pitch bend sensitivity */ + /* MSB only / 1 semitone per 128 */ + chan->gm_rpn_pitch_bend_range = val; + break; + + case 0x0001: /* fine tuning: */ + /* MSB/LSB, 8192=center, 100/8192 cent step */ + chan->gm_rpn_fine_tuning = val - 8192; + break; + + case 0x0002: /* coarse tuning */ + /* MSB only / 8192=center, 1 semitone per 128 */ + chan->gm_rpn_coarse_tuning = val - 8192; + break; + + case 0x7F7F: /* "lock-in" RPN */ + /* ignored */ + break; + } + } + /* should call nrpn or rpn callback here.. */ +} + +/* + * Process an nrpn message. + */ +static void +nrpn(const struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, + struct snd_midi_channel_set *chset) +{ + /* parse XG NRPNs here if possible */ + if (ops->nrpn) + ops->nrpn(drv, chan, chset); +} + + +/* + * convert channel parameter in GS sysex + */ +static int +get_channel(unsigned char cmd) +{ + int p = cmd & 0x0f; + if (p == 0) + p = 9; + else if (p < 10) + p--; + return p; +} + + +/* + * Process a sysex message. + */ +static void +sysex(const struct snd_midi_op *ops, void *private, unsigned char *buf, int len, + struct snd_midi_channel_set *chset) +{ + /* GM on */ + static const unsigned char gm_on_macro[] = { + 0x7e,0x7f,0x09,0x01, + }; + /* XG on */ + static const unsigned char xg_on_macro[] = { + 0x43,0x10,0x4c,0x00,0x00,0x7e,0x00, + }; + /* GS prefix + * drum channel: XX=0x1?(channel), YY=0x15, ZZ=on/off + * reverb mode: XX=0x01, YY=0x30, ZZ=0-7 + * chorus mode: XX=0x01, YY=0x38, ZZ=0-7 + * master vol: XX=0x00, YY=0x04, ZZ=0-127 + */ + static const unsigned char gs_pfx_macro[] = { + 0x41,0x10,0x42,0x12,0x40,/*XX,YY,ZZ*/ + }; + + int parsed = SNDRV_MIDI_SYSEX_NOT_PARSED; + + if (len <= 0 || buf[0] != 0xf0) + return; + /* skip first byte */ + buf++; + len--; + + /* GM on */ + if (len >= (int)sizeof(gm_on_macro) && + memcmp(buf, gm_on_macro, sizeof(gm_on_macro)) == 0) { + if (chset->midi_mode != SNDRV_MIDI_MODE_GS && + chset->midi_mode != SNDRV_MIDI_MODE_XG) { + chset->midi_mode = SNDRV_MIDI_MODE_GM; + reset_all_channels(chset); + parsed = SNDRV_MIDI_SYSEX_GM_ON; + } + } + + /* GS macros */ + else if (len >= 8 && + memcmp(buf, gs_pfx_macro, sizeof(gs_pfx_macro)) == 0) { + if (chset->midi_mode != SNDRV_MIDI_MODE_GS && + chset->midi_mode != SNDRV_MIDI_MODE_XG) + chset->midi_mode = SNDRV_MIDI_MODE_GS; + + if (buf[5] == 0x00 && buf[6] == 0x7f && buf[7] == 0x00) { + /* GS reset */ + parsed = SNDRV_MIDI_SYSEX_GS_RESET; + reset_all_channels(chset); + } + + else if ((buf[5] & 0xf0) == 0x10 && buf[6] == 0x15) { + /* drum pattern */ + int p = get_channel(buf[5]); + if (p < chset->max_channels) { + parsed = SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL; + if (buf[7]) + chset->channels[p].drum_channel = 1; + else + chset->channels[p].drum_channel = 0; + } + + } else if ((buf[5] & 0xf0) == 0x10 && buf[6] == 0x21) { + /* program */ + int p = get_channel(buf[5]); + if (p < chset->max_channels && + ! chset->channels[p].drum_channel) { + parsed = SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL; + chset->channels[p].midi_program = buf[7]; + } + + } else if (buf[5] == 0x01 && buf[6] == 0x30) { + /* reverb mode */ + parsed = SNDRV_MIDI_SYSEX_GS_REVERB_MODE; + chset->gs_reverb_mode = buf[7]; + + } else if (buf[5] == 0x01 && buf[6] == 0x38) { + /* chorus mode */ + parsed = SNDRV_MIDI_SYSEX_GS_CHORUS_MODE; + chset->gs_chorus_mode = buf[7]; + + } else if (buf[5] == 0x00 && buf[6] == 0x04) { + /* master volume */ + parsed = SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME; + chset->gs_master_volume = buf[7]; + + } + } + + /* XG on */ + else if (len >= (int)sizeof(xg_on_macro) && + memcmp(buf, xg_on_macro, sizeof(xg_on_macro)) == 0) { + int i; + chset->midi_mode = SNDRV_MIDI_MODE_XG; + parsed = SNDRV_MIDI_SYSEX_XG_ON; + /* reset CC#0 for drums */ + for (i = 0; i < chset->max_channels; i++) { + if (chset->channels[i].drum_channel) + chset->channels[i].control[MIDI_CTL_MSB_BANK] = 127; + else + chset->channels[i].control[MIDI_CTL_MSB_BANK] = 0; + } + } + + if (ops->sysex) + ops->sysex(private, buf - 1, len + 1, parsed, chset); +} + +/* + * all sound off + */ +static void +all_sounds_off(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel *chan) +{ + int n; + + if (! ops->note_terminate) + return; + for (n = 0; n < 128; n++) { + if (chan->note[n]) { + ops->note_terminate(drv, n, chan); + chan->note[n] = 0; + } + } +} + +/* + * all notes off + */ +static void +all_notes_off(const struct snd_midi_op *ops, void *drv, + struct snd_midi_channel *chan) +{ + int n; + + if (! ops->note_off) + return; + for (n = 0; n < 128; n++) { + if (chan->note[n] == SNDRV_MIDI_NOTE_ON) + note_off(ops, drv, chan, n, 0); + } +} + +/* + * Initialise a single midi channel control block. + */ +static void snd_midi_channel_init(struct snd_midi_channel *p, int n) +{ + if (p == NULL) + return; + + memset(p, 0, sizeof(struct snd_midi_channel)); + p->private = NULL; + p->number = n; + + snd_midi_reset_controllers(p); + p->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ + p->gm_rpn_fine_tuning = 0; + p->gm_rpn_coarse_tuning = 0; + + if (n == 9) + p->drum_channel = 1; /* Default ch 10 as drums */ +} + +/* + * Allocate and initialise a set of midi channel control blocks. + */ +static struct snd_midi_channel *snd_midi_channel_init_set(int n) +{ + struct snd_midi_channel *chan; + int i; + + chan = kmalloc_array(n, sizeof(struct snd_midi_channel), GFP_KERNEL); + if (chan) { + for (i = 0; i < n; i++) + snd_midi_channel_init(chan+i, i); + } + + return chan; +} + +/* + * reset all midi channels + */ +static void +reset_all_channels(struct snd_midi_channel_set *chset) +{ + int ch; + for (ch = 0; ch < chset->max_channels; ch++) { + struct snd_midi_channel *chan = chset->channels + ch; + snd_midi_reset_controllers(chan); + chan->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ + chan->gm_rpn_fine_tuning = 0; + chan->gm_rpn_coarse_tuning = 0; + + if (ch == 9) + chan->drum_channel = 1; + else + chan->drum_channel = 0; + } +} + + +/* + * Allocate and initialise a midi channel set. + */ +struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n) +{ + struct snd_midi_channel_set *chset; + + chset = kmalloc(sizeof(*chset), GFP_KERNEL); + if (chset) { + chset->channels = snd_midi_channel_init_set(n); + chset->private_data = NULL; + chset->max_channels = n; + } + return chset; +} +EXPORT_SYMBOL(snd_midi_channel_alloc_set); + +/* + * Reset the midi controllers on a particular channel to default values. + */ +static void snd_midi_reset_controllers(struct snd_midi_channel *chan) +{ + memset(chan->control, 0, sizeof(chan->control)); + chan->gm_volume = 127; + chan->gm_expression = 127; + chan->gm_pan = 64; +} + + +/* + * Free a midi channel set. + */ +void snd_midi_channel_free_set(struct snd_midi_channel_set *chset) +{ + if (chset == NULL) + return; + kfree(chset->channels); + kfree(chset); +} +EXPORT_SYMBOL(snd_midi_channel_free_set); 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