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/jack.c | 700 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 700 insertions(+) create mode 100644 sound/core/jack.c (limited to 'sound/core/jack.c') diff --git a/sound/core/jack.c b/sound/core/jack.c new file mode 100644 index 000000000..88493cc31 --- /dev/null +++ b/sound/core/jack.c @@ -0,0 +1,700 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Jack abstraction layer + * + * Copyright 2008 Wolfson Microelectronics + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct snd_jack_kctl { + struct snd_kcontrol *kctl; + struct list_head list; /* list of controls belong to the same jack */ + unsigned int mask_bits; /* only masked status bits are reported via kctl */ + struct snd_jack *jack; /* pointer to struct snd_jack */ + bool sw_inject_enable; /* allow to inject plug event via debugfs */ +#ifdef CONFIG_SND_JACK_INJECTION_DEBUG + struct dentry *jack_debugfs_root; /* jack_kctl debugfs root */ +#endif +}; + +#ifdef CONFIG_SND_JACK_INPUT_DEV +static const int jack_switch_types[SND_JACK_SWITCH_TYPES] = { + SW_HEADPHONE_INSERT, + SW_MICROPHONE_INSERT, + SW_LINEOUT_INSERT, + SW_JACK_PHYSICAL_INSERT, + SW_VIDEOOUT_INSERT, + SW_LINEIN_INSERT, +}; +#endif /* CONFIG_SND_JACK_INPUT_DEV */ + +static int snd_jack_dev_disconnect(struct snd_device *device) +{ +#ifdef CONFIG_SND_JACK_INPUT_DEV + struct snd_jack *jack = device->device_data; + + mutex_lock(&jack->input_dev_lock); + if (!jack->input_dev) { + mutex_unlock(&jack->input_dev_lock); + return 0; + } + + /* If the input device is registered with the input subsystem + * then we need to use a different deallocator. */ + if (jack->registered) + input_unregister_device(jack->input_dev); + else + input_free_device(jack->input_dev); + jack->input_dev = NULL; + mutex_unlock(&jack->input_dev_lock); +#endif /* CONFIG_SND_JACK_INPUT_DEV */ + return 0; +} + +static int snd_jack_dev_free(struct snd_device *device) +{ + struct snd_jack *jack = device->device_data; + struct snd_card *card = device->card; + struct snd_jack_kctl *jack_kctl, *tmp_jack_kctl; + + down_write(&card->controls_rwsem); + list_for_each_entry_safe(jack_kctl, tmp_jack_kctl, &jack->kctl_list, list) { + list_del_init(&jack_kctl->list); + snd_ctl_remove(card, jack_kctl->kctl); + } + up_write(&card->controls_rwsem); + + if (jack->private_free) + jack->private_free(jack); + + snd_jack_dev_disconnect(device); + + kfree(jack->id); + kfree(jack); + + return 0; +} + +#ifdef CONFIG_SND_JACK_INPUT_DEV +static int snd_jack_dev_register(struct snd_device *device) +{ + struct snd_jack *jack = device->device_data; + struct snd_card *card = device->card; + int err, i; + + snprintf(jack->name, sizeof(jack->name), "%s %s", + card->shortname, jack->id); + + mutex_lock(&jack->input_dev_lock); + if (!jack->input_dev) { + mutex_unlock(&jack->input_dev_lock); + return 0; + } + + jack->input_dev->name = jack->name; + + /* Default to the sound card device. */ + if (!jack->input_dev->dev.parent) + jack->input_dev->dev.parent = snd_card_get_device_link(card); + + /* Add capabilities for any keys that are enabled */ + for (i = 0; i < ARRAY_SIZE(jack->key); i++) { + int testbit = SND_JACK_BTN_0 >> i; + + if (!(jack->type & testbit)) + continue; + + if (!jack->key[i]) + jack->key[i] = BTN_0 + i; + + input_set_capability(jack->input_dev, EV_KEY, jack->key[i]); + } + + err = input_register_device(jack->input_dev); + if (err == 0) + jack->registered = 1; + + mutex_unlock(&jack->input_dev_lock); + return err; +} +#endif /* CONFIG_SND_JACK_INPUT_DEV */ + +#ifdef CONFIG_SND_JACK_INJECTION_DEBUG +static void snd_jack_inject_report(struct snd_jack_kctl *jack_kctl, int status) +{ + struct snd_jack *jack; +#ifdef CONFIG_SND_JACK_INPUT_DEV + int i; +#endif + if (!jack_kctl) + return; + + jack = jack_kctl->jack; + + if (jack_kctl->sw_inject_enable) + snd_kctl_jack_report(jack->card, jack_kctl->kctl, + status & jack_kctl->mask_bits); + +#ifdef CONFIG_SND_JACK_INPUT_DEV + if (!jack->input_dev) + return; + + for (i = 0; i < ARRAY_SIZE(jack->key); i++) { + int testbit = ((SND_JACK_BTN_0 >> i) & jack_kctl->mask_bits); + + if (jack->type & testbit) + input_report_key(jack->input_dev, jack->key[i], + status & testbit); + } + + for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) { + int testbit = ((1 << i) & jack_kctl->mask_bits); + + if (jack->type & testbit) + input_report_switch(jack->input_dev, + jack_switch_types[i], + status & testbit); + } + + input_sync(jack->input_dev); +#endif /* CONFIG_SND_JACK_INPUT_DEV */ +} + +static ssize_t sw_inject_enable_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + int len, ret; + char buf[128]; + + len = scnprintf(buf, sizeof(buf), "%s: %s\t\t%s: %i\n", "Jack", jack_kctl->kctl->id.name, + "Inject Enabled", jack_kctl->sw_inject_enable); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + return ret; +} + +static ssize_t sw_inject_enable_write(struct file *file, + const char __user *from, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + int ret, err; + unsigned long enable; + char buf[8] = { 0 }; + + ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, from, count); + err = kstrtoul(buf, 0, &enable); + if (err) + return err; + + if (jack_kctl->sw_inject_enable == (!!enable)) + return ret; + + jack_kctl->sw_inject_enable = !!enable; + + if (!jack_kctl->sw_inject_enable) + snd_jack_report(jack_kctl->jack, jack_kctl->jack->hw_status_cache); + + return ret; +} + +static ssize_t jackin_inject_write(struct file *file, + const char __user *from, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + int ret, err; + unsigned long enable; + char buf[8] = { 0 }; + + if (!jack_kctl->sw_inject_enable) + return -EINVAL; + + ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, from, count); + err = kstrtoul(buf, 0, &enable); + if (err) + return err; + + snd_jack_inject_report(jack_kctl, !!enable ? jack_kctl->mask_bits : 0); + + return ret; +} + +static ssize_t jack_kctl_id_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char buf[64]; + int len, ret; + + len = scnprintf(buf, sizeof(buf), "%s\n", jack_kctl->kctl->id.name); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + return ret; +} + +/* the bit definition is aligned with snd_jack_types in jack.h */ +static const char * const jack_events_name[] = { + "HEADPHONE(0x0001)", "MICROPHONE(0x0002)", "LINEOUT(0x0004)", + "MECHANICAL(0x0008)", "VIDEOOUT(0x0010)", "LINEIN(0x0020)", + "", "", "", "BTN_5(0x0200)", "BTN_4(0x0400)", "BTN_3(0x0800)", + "BTN_2(0x1000)", "BTN_1(0x2000)", "BTN_0(0x4000)", "", +}; + +/* the recommended buffer size is 256 */ +static int parse_mask_bits(unsigned int mask_bits, char *buf, size_t buf_size) +{ + int i; + + scnprintf(buf, buf_size, "0x%04x", mask_bits); + + for (i = 0; i < ARRAY_SIZE(jack_events_name); i++) + if (mask_bits & (1 << i)) { + strlcat(buf, " ", buf_size); + strlcat(buf, jack_events_name[i], buf_size); + } + strlcat(buf, "\n", buf_size); + + return strlen(buf); +} + +static ssize_t jack_kctl_mask_bits_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char buf[256]; + int len, ret; + + len = parse_mask_bits(jack_kctl->mask_bits, buf, sizeof(buf)); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + return ret; +} + +static ssize_t jack_kctl_status_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char buf[16]; + int len, ret; + + len = scnprintf(buf, sizeof(buf), "%s\n", jack_kctl->kctl->private_value ? + "Plugged" : "Unplugged"); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + return ret; +} + +#ifdef CONFIG_SND_JACK_INPUT_DEV +static ssize_t jack_type_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char buf[256]; + int len, ret; + + len = parse_mask_bits(jack_kctl->jack->type, buf, sizeof(buf)); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + return ret; +} + +static const struct file_operations jack_type_fops = { + .open = simple_open, + .read = jack_type_read, + .llseek = default_llseek, +}; +#endif + +static const struct file_operations sw_inject_enable_fops = { + .open = simple_open, + .read = sw_inject_enable_read, + .write = sw_inject_enable_write, + .llseek = default_llseek, +}; + +static const struct file_operations jackin_inject_fops = { + .open = simple_open, + .write = jackin_inject_write, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_id_fops = { + .open = simple_open, + .read = jack_kctl_id_read, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_mask_bits_fops = { + .open = simple_open, + .read = jack_kctl_mask_bits_read, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_status_fops = { + .open = simple_open, + .read = jack_kctl_status_read, + .llseek = default_llseek, +}; + +static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, + struct snd_jack_kctl *jack_kctl) +{ + char *tname; + int i; + + /* Don't create injection interface for Phantom jacks */ + if (strstr(jack_kctl->kctl->id.name, "Phantom")) + return 0; + + tname = kstrdup(jack_kctl->kctl->id.name, GFP_KERNEL); + if (!tname) + return -ENOMEM; + + /* replace the chars which are not suitable for folder's name with _ */ + for (i = 0; tname[i]; i++) + if (!isalnum(tname[i])) + tname[i] = '_'; + + jack_kctl->jack_debugfs_root = debugfs_create_dir(tname, jack->card->debugfs_root); + kfree(tname); + + debugfs_create_file("sw_inject_enable", 0644, jack_kctl->jack_debugfs_root, jack_kctl, + &sw_inject_enable_fops); + + debugfs_create_file("jackin_inject", 0200, jack_kctl->jack_debugfs_root, jack_kctl, + &jackin_inject_fops); + + debugfs_create_file("kctl_id", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_id_fops); + + debugfs_create_file("mask_bits", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_mask_bits_fops); + + debugfs_create_file("status", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_status_fops); + +#ifdef CONFIG_SND_JACK_INPUT_DEV + debugfs_create_file("type", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_type_fops); +#endif + return 0; +} + +static void snd_jack_debugfs_clear_inject_node(struct snd_jack_kctl *jack_kctl) +{ + debugfs_remove(jack_kctl->jack_debugfs_root); + jack_kctl->jack_debugfs_root = NULL; +} +#else /* CONFIG_SND_JACK_INJECTION_DEBUG */ +static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, + struct snd_jack_kctl *jack_kctl) +{ + return 0; +} + +static void snd_jack_debugfs_clear_inject_node(struct snd_jack_kctl *jack_kctl) +{ +} +#endif /* CONFIG_SND_JACK_INJECTION_DEBUG */ + +static void snd_jack_kctl_private_free(struct snd_kcontrol *kctl) +{ + struct snd_jack_kctl *jack_kctl; + + jack_kctl = kctl->private_data; + if (jack_kctl) { + snd_jack_debugfs_clear_inject_node(jack_kctl); + list_del(&jack_kctl->list); + kfree(jack_kctl); + } +} + +static void snd_jack_kctl_add(struct snd_jack *jack, struct snd_jack_kctl *jack_kctl) +{ + jack_kctl->jack = jack; + list_add_tail(&jack_kctl->list, &jack->kctl_list); + snd_jack_debugfs_add_inject_node(jack, jack_kctl); +} + +static struct snd_jack_kctl * snd_jack_kctl_new(struct snd_card *card, const char *name, unsigned int mask) +{ + struct snd_kcontrol *kctl; + struct snd_jack_kctl *jack_kctl; + int err; + + kctl = snd_kctl_jack_new(name, card); + if (!kctl) + return NULL; + + err = snd_ctl_add(card, kctl); + if (err < 0) + return NULL; + + jack_kctl = kzalloc(sizeof(*jack_kctl), GFP_KERNEL); + + if (!jack_kctl) + goto error; + + jack_kctl->kctl = kctl; + jack_kctl->mask_bits = mask; + + kctl->private_data = jack_kctl; + kctl->private_free = snd_jack_kctl_private_free; + + return jack_kctl; +error: + snd_ctl_free_one(kctl); + return NULL; +} + +/** + * snd_jack_add_new_kctl - Create a new snd_jack_kctl and add it to jack + * @jack: the jack instance which the kctl will attaching to + * @name: the name for the snd_kcontrol object + * @mask: a bitmask of enum snd_jack_type values that can be detected + * by this snd_jack_kctl object. + * + * Creates a new snd_kcontrol object and adds it to the jack kctl_list. + * + * Return: Zero if successful, or a negative error code on failure. + */ +int snd_jack_add_new_kctl(struct snd_jack *jack, const char * name, int mask) +{ + struct snd_jack_kctl *jack_kctl; + + jack_kctl = snd_jack_kctl_new(jack->card, name, mask); + if (!jack_kctl) + return -ENOMEM; + + snd_jack_kctl_add(jack, jack_kctl); + return 0; +} +EXPORT_SYMBOL(snd_jack_add_new_kctl); + +/** + * snd_jack_new - Create a new jack + * @card: the card instance + * @id: an identifying string for this jack + * @type: a bitmask of enum snd_jack_type values that can be detected by + * this jack + * @jjack: Used to provide the allocated jack object to the caller. + * @initial_kctl: if true, create a kcontrol and add it to the jack list. + * @phantom_jack: Don't create a input device for phantom jacks. + * + * Creates a new jack object. + * + * Return: Zero if successful, or a negative error code on failure. + * On success @jjack will be initialised. + */ +int snd_jack_new(struct snd_card *card, const char *id, int type, + struct snd_jack **jjack, bool initial_kctl, bool phantom_jack) +{ + struct snd_jack *jack; + struct snd_jack_kctl *jack_kctl = NULL; + int err; + static const struct snd_device_ops ops = { + .dev_free = snd_jack_dev_free, +#ifdef CONFIG_SND_JACK_INPUT_DEV + .dev_register = snd_jack_dev_register, + .dev_disconnect = snd_jack_dev_disconnect, +#endif /* CONFIG_SND_JACK_INPUT_DEV */ + }; + + if (initial_kctl) { + jack_kctl = snd_jack_kctl_new(card, id, type); + if (!jack_kctl) + return -ENOMEM; + } + + jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL); + if (jack == NULL) + return -ENOMEM; + + jack->id = kstrdup(id, GFP_KERNEL); + if (jack->id == NULL) { + kfree(jack); + return -ENOMEM; + } + +#ifdef CONFIG_SND_JACK_INPUT_DEV + mutex_init(&jack->input_dev_lock); + + /* don't create input device for phantom jack */ + if (!phantom_jack) { + int i; + + jack->input_dev = input_allocate_device(); + if (jack->input_dev == NULL) { + err = -ENOMEM; + goto fail_input; + } + + jack->input_dev->phys = "ALSA"; + + jack->type = type; + + for (i = 0; i < SND_JACK_SWITCH_TYPES; i++) + if (type & (1 << i)) + input_set_capability(jack->input_dev, EV_SW, + jack_switch_types[i]); + + } +#endif /* CONFIG_SND_JACK_INPUT_DEV */ + + err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops); + if (err < 0) + goto fail_input; + + jack->card = card; + INIT_LIST_HEAD(&jack->kctl_list); + + if (initial_kctl) + snd_jack_kctl_add(jack, jack_kctl); + + *jjack = jack; + + return 0; + +fail_input: +#ifdef CONFIG_SND_JACK_INPUT_DEV + input_free_device(jack->input_dev); +#endif + kfree(jack->id); + kfree(jack); + return err; +} +EXPORT_SYMBOL(snd_jack_new); + +#ifdef CONFIG_SND_JACK_INPUT_DEV +/** + * snd_jack_set_parent - Set the parent device for a jack + * + * @jack: The jack to configure + * @parent: The device to set as parent for the jack. + * + * Set the parent for the jack devices in the device tree. This + * function is only valid prior to registration of the jack. If no + * parent is configured then the parent device will be the sound card. + */ +void snd_jack_set_parent(struct snd_jack *jack, struct device *parent) +{ + WARN_ON(jack->registered); + mutex_lock(&jack->input_dev_lock); + if (!jack->input_dev) { + mutex_unlock(&jack->input_dev_lock); + return; + } + + jack->input_dev->dev.parent = parent; + mutex_unlock(&jack->input_dev_lock); +} +EXPORT_SYMBOL(snd_jack_set_parent); + +/** + * snd_jack_set_key - Set a key mapping on a jack + * + * @jack: The jack to configure + * @type: Jack report type for this key + * @keytype: Input layer key type to be reported + * + * Map a SND_JACK_BTN_* button type to an input layer key, allowing + * reporting of keys on accessories via the jack abstraction. If no + * mapping is provided but keys are enabled in the jack type then + * BTN_n numeric buttons will be reported. + * + * If jacks are not reporting via the input API this call will have no + * effect. + * + * Note that this is intended to be use by simple devices with small + * numbers of keys that can be reported. It is also possible to + * access the input device directly - devices with complex input + * capabilities on accessories should consider doing this rather than + * using this abstraction. + * + * This function may only be called prior to registration of the jack. + * + * Return: Zero if successful, or a negative error code on failure. + */ +int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type, + int keytype) +{ + int key = fls(SND_JACK_BTN_0) - fls(type); + + WARN_ON(jack->registered); + + if (!keytype || key >= ARRAY_SIZE(jack->key)) + return -EINVAL; + + jack->type |= type; + jack->key[key] = keytype; + return 0; +} +EXPORT_SYMBOL(snd_jack_set_key); +#endif /* CONFIG_SND_JACK_INPUT_DEV */ + +/** + * snd_jack_report - Report the current status of a jack + * Note: This function uses mutexes and should be called from a + * context which can sleep (such as a workqueue). + * + * @jack: The jack to report status for + * @status: The current status of the jack + */ +void snd_jack_report(struct snd_jack *jack, int status) +{ + struct snd_jack_kctl *jack_kctl; + unsigned int mask_bits = 0; +#ifdef CONFIG_SND_JACK_INPUT_DEV + int i; +#endif + + if (!jack) + return; + + jack->hw_status_cache = status; + + list_for_each_entry(jack_kctl, &jack->kctl_list, list) + if (jack_kctl->sw_inject_enable) + mask_bits |= jack_kctl->mask_bits; + else + snd_kctl_jack_report(jack->card, jack_kctl->kctl, + status & jack_kctl->mask_bits); + +#ifdef CONFIG_SND_JACK_INPUT_DEV + mutex_lock(&jack->input_dev_lock); + if (!jack->input_dev) { + mutex_unlock(&jack->input_dev_lock); + return; + } + + for (i = 0; i < ARRAY_SIZE(jack->key); i++) { + int testbit = ((SND_JACK_BTN_0 >> i) & ~mask_bits); + + if (jack->type & testbit) + input_report_key(jack->input_dev, jack->key[i], + status & testbit); + } + + for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) { + int testbit = ((1 << i) & ~mask_bits); + + if (jack->type & testbit) + input_report_switch(jack->input_dev, + jack_switch_types[i], + status & testbit); + } + + input_sync(jack->input_dev); + mutex_unlock(&jack->input_dev_lock); +#endif /* CONFIG_SND_JACK_INPUT_DEV */ +} +EXPORT_SYMBOL(snd_jack_report); -- cgit v1.2.3