d0ff9a2add
* aosp/android-4.19-stable: ANDROID: fix up abi issue with struct snd_pcm_runtime Linux 4.19.244 tty/serial: digicolor: fix possible null-ptr-deref in digicolor_uart_probe() ping: fix address binding wrt vrf MIPS: fix allmodconfig build with latest mkimage drm/vmwgfx: Initialize drm_mode_fb_cmd2 cgroup/cpuset: Remove cpus_allowed/mems_allowed setup in cpuset_init_smp() slimbus: qcom: Fix IRQ check in qcom_slim_probe USB: serial: option: add Fibocom MA510 modem USB: serial: option: add Fibocom L610 modem USB: serial: qcserial: add support for Sierra Wireless EM7590 USB: serial: pl2303: add device id for HP LM930 Display usb: typec: tcpci: Don't skip cleanup in .remove() on error usb: cdc-wdm: fix reading stuck on device close tcp: resalt the secret every 10 seconds s390: disable -Warray-bounds ASoC: ops: Validate input values in snd_soc_put_volsw_range() ASoC: max98090: Generate notifications on changes for custom control ASoC: max98090: Reject invalid values in custom control put() hwmon: (f71882fg) Fix negative temperature gfs2: Fix filesystem block deallocation for short writes net: sfc: ef10: fix memory leak in efx_ef10_mtd_probe() net/smc: non blocking recvmsg() return -EAGAIN when no data and signal_pending net/sched: act_pedit: really ensure the skb is writable s390/lcs: fix variable dereferenced before check s390/ctcm: fix potential memory leak s390/ctcm: fix variable dereferenced before check hwmon: (ltq-cputemp) restrict it to SOC_XWAY mac80211_hwsim: call ieee80211_tx_prepare_skb under RCU protection netlink: do not reset transport header in netlink_recvmsg() ipv4: drop dst in multicast routing path net: Fix features skip in for_each_netdev_feature() hwmon: (tmp401) Add OF device ID table batman-adv: Don't skb_split skbuffs with frag_list Linux 4.19.243 VFS: Fix memory leak caused by concurrently mounting fs with subtype mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic() mm: hugetlb: fix missing cache flush in copy_huge_page_from_user() ALSA: pcm: Fix potential AB/BA lock with buffer_mutex and mmap_lock ALSA: pcm: Fix races among concurrent prealloc proc writes ALSA: pcm: Fix races among concurrent prepare and hw_params/hw_free calls ALSA: pcm: Fix races among concurrent read/write and buffer changes ALSA: pcm: Fix races among concurrent hw_params and hw_free calls Bluetooth: Fix the creation of hdev->name can: grcan: only use the NAPI poll budget for RX can: grcan: grcan_probe(): fix broken system id check for errata workaround needs nfp: bpf: silence bitwise vs. logical OR warning drm/amd/display/dc/gpio/gpio_service: Pass around correct dce_{version, environment} types block: drbd: drbd_nl: Make conversion to 'enum drbd_ret_code' explicit MIPS: Use address-of operator on section symbols ANDROID: GKI: update the abi .xml file due to hex_to_bin() changes Linux 4.19.242 mmc: rtsx: add 74 Clocks in power on flow PCI: aardvark: Fix reading MSI interrupt number PCI: aardvark: Clear all MSIs at setup dm: interlock pending dm_io and dm_wait_for_bios_completion dm: fix mempool NULL pointer race when completing IO tcp: make sure treq->af_specific is initialized mm: fix unexpected zeroed page mapping with zram swap kvm: x86/cpuid: Only provide CPUID leaf 0xA if host has architectural PMU net: igmp: respect RCU rules in ip_mc_source() and ip_mc_msfilter() btrfs: always log symlinks in full mode smsc911x: allow using IRQ0 selftests: mirror_gre_bridge_1q: Avoid changing PVID while interface is operational net: emaclite: Add error handling for of_address_to_resource() net: stmmac: dwmac-sun8i: add missing of_node_put() in sun8i_dwmac_register_mdio_mux() ASoC: dmaengine: Restore NULL prepare_slave_config() callback hwmon: (adt7470) Fix warning on module removal NFC: netlink: fix sleep in atomic bug when firmware download timeout nfc: nfcmrvl: main: reorder destructive operations in nfcmrvl_nci_unregister_dev to avoid bugs nfc: replace improper check device_is_registered() in netlink related functions can: grcan: use ofdev->dev when allocating DMA memory can: grcan: grcan_close(): fix deadlock ASoC: wm8958: Fix change notifications for DSP controls genirq: Synchronize interrupt thread startup firewire: core: extend card->lock in fw_core_handle_bus_reset firewire: remove check of list iterator against head past the loop body firewire: fix potential uaf in outbound_phy_packet_callback() Revert "SUNRPC: attempt AF_LOCAL connect on setup" gpiolib: of: fix bounds check for 'gpio-reserved-ranges' ALSA: fireworks: fix wrong return count shorter than expected by 4 bytes parisc: Merge model and model name into one line in /proc/cpuinfo MIPS: Fix CP0 counter erratum detection for R4k CPUs drm/vgem: Close use-after-free race in vgem_gem_create tty: n_gsm: fix incorrect UA handling tty: n_gsm: fix wrong command frame length field encoding tty: n_gsm: fix wrong command retry handling tty: n_gsm: fix missing explicit ldisc flush tty: n_gsm: fix insufficient txframe size netfilter: nft_socket: only do sk lookups when indev is available tty: n_gsm: fix malformed counter for out of frame data tty: n_gsm: fix wrong signal octet encoding in convergence layer type 2 x86/cpu: Load microcode during restore_processor_state() drivers: net: hippi: Fix deadlock in rr_close() cifs: destage any unwritten data to the server before calling copychunk_write x86: __memcpy_flushcache: fix wrong alignment if size > 2^32 ip6_gre: Avoid updating tunnel->tun_hlen in __gre6_xmit() ASoC: wm8731: Disable the regulator when probing fails bnx2x: fix napi API usage sequence net: bcmgenet: hide status block before TX timestamping clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource() bus: sunxi-rsb: Fix the return value of sunxi_rsb_device_create() tcp: fix potential xmit stalls caused by TCP_NOTSENT_LOWAT ip_gre: Make o_seqno start from 0 in native mode net: hns3: add validity check for message data length pinctrl: pistachio: fix use of irq_of_parse_and_map() ARM: dts: imx6ull-colibri: fix vqmmc regulator sctp: check asoc strreset_chunk in sctp_generate_reconf_event tcp: md5: incorrect tcp_header_len for incoming connections mtd: rawnand: Fix return value check of wait_for_completion_timeout ipvs: correctly print the memory size of ip_vs_conn_tab ARM: dts: logicpd-som-lv: Fix wrong pinmuxing on OMAP35 ARM: dts: Fix mmc order for omap3-gta04 ARM: OMAP2+: Fix refcount leak in omap_gic_of_init phy: samsung: exynos5250-sata: fix missing device put in probe error paths phy: samsung: Fix missing of_node_put() in exynos_sata_phy_probe ARM: dts: imx6qdl-apalis: Fix sgtl5000 detection issue USB: Fix xhci event ring dequeue pointer ERDP update issue mtd: rawnand: fix ecc parameters for mt7622 hex2bin: fix access beyond string end hex2bin: make the function hex_to_bin constant-time serial: 8250: Correct the clock for EndRun PTP/1588 PCIe device serial: 8250: Also set sticky MCR bits in console restoration serial: imx: fix overrun interrupts in DMA mode usb: dwc3: gadget: Return proper request status usb: dwc3: core: Fix tx/rx threshold settings usb: gadget: configfs: clear deactivation flag in configfs_composite_unbind() usb: gadget: uvc: Fix crash when encoding data for usb request usb: misc: fix improper handling of refcount in uss720_probe() iio: magnetometer: ak8975: Fix the error handling in ak8975_power_on() iio: dac: ad5446: Fix read_raw not returning set value iio: dac: ad5592r: Fix the missing return value. xhci: stop polling roothubs after shutdown USB: serial: option: add Telit 0x1057, 0x1058, 0x1075 compositions USB: serial: option: add support for Cinterion MV32-WA/MV32-WB USB: serial: cp210x: add PIDs for Kamstrup USB Meter Reader USB: serial: whiteheat: fix heap overflow in WHITEHEAT_GET_DTR_RTS USB: quirks: add STRING quirk for VCOM device USB: quirks: add a Realtek card reader usb: mtu3: fix USB 3.0 dual-role-switch from device to host ANDROID: dm-bow: Protect Ranges fetched and erased from the RB tree Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com> Conflicts: drivers/slimbus/qcom-ctrl.c drivers/usb/dwc3/gadget.c sound/core/pcm_native.c
1312 lines
36 KiB
C
1312 lines
36 KiB
C
/*
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* Digital Audio (PCM) abstract layer
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/time.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/nospec.h>
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#include <sound/core.h>
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#include <sound/minors.h>
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#include <sound/pcm.h>
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#include <sound/timer.h>
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#include <sound/control.h>
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#include <sound/info.h>
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#include "pcm_local.h"
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
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MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
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MODULE_LICENSE("GPL");
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static LIST_HEAD(snd_pcm_devices);
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static DEFINE_MUTEX(register_mutex);
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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static LIST_HEAD(snd_pcm_notify_list);
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#endif
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static int snd_pcm_free(struct snd_pcm *pcm);
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static int snd_pcm_dev_free(struct snd_device *device);
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static int snd_pcm_dev_register(struct snd_device *device);
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static int snd_pcm_dev_disconnect(struct snd_device *device);
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static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
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{
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struct snd_pcm *pcm;
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list_for_each_entry(pcm, &snd_pcm_devices, list) {
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if (pcm->card == card && pcm->device == device)
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return pcm;
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}
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return NULL;
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}
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static int snd_pcm_next(struct snd_card *card, int device)
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{
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struct snd_pcm *pcm;
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list_for_each_entry(pcm, &snd_pcm_devices, list) {
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if (pcm->card == card && pcm->device > device)
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return pcm->device;
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else if (pcm->card->number > card->number)
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return -1;
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}
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return -1;
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}
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static int snd_pcm_add(struct snd_pcm *newpcm)
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{
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struct snd_pcm *pcm;
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if (newpcm->internal)
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return 0;
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list_for_each_entry(pcm, &snd_pcm_devices, list) {
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if (pcm->card == newpcm->card && pcm->device == newpcm->device)
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return -EBUSY;
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if (pcm->card->number > newpcm->card->number ||
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(pcm->card == newpcm->card &&
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pcm->device > newpcm->device)) {
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list_add(&newpcm->list, pcm->list.prev);
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return 0;
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}
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}
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list_add_tail(&newpcm->list, &snd_pcm_devices);
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return 0;
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}
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static int snd_pcm_control_ioctl(struct snd_card *card,
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struct snd_ctl_file *control,
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unsigned int cmd, unsigned long arg)
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{
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switch (cmd) {
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case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE:
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{
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int device;
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if (get_user(device, (int __user *)arg))
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return -EFAULT;
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mutex_lock(®ister_mutex);
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device = snd_pcm_next(card, device);
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mutex_unlock(®ister_mutex);
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if (put_user(device, (int __user *)arg))
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return -EFAULT;
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return 0;
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}
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case SNDRV_CTL_IOCTL_PCM_INFO:
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{
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struct snd_pcm_info __user *info;
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unsigned int device, subdevice;
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int stream;
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struct snd_pcm *pcm;
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struct snd_pcm_str *pstr;
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struct snd_pcm_substream *substream;
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int err;
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info = (struct snd_pcm_info __user *)arg;
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if (get_user(device, &info->device))
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return -EFAULT;
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if (get_user(stream, &info->stream))
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return -EFAULT;
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if (stream < 0 || stream > 1)
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return -EINVAL;
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stream = array_index_nospec(stream, 2);
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if (get_user(subdevice, &info->subdevice))
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return -EFAULT;
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mutex_lock(®ister_mutex);
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pcm = snd_pcm_get(card, device);
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if (pcm == NULL) {
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err = -ENXIO;
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goto _error;
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}
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pstr = &pcm->streams[stream];
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if (pstr->substream_count == 0) {
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err = -ENOENT;
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goto _error;
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}
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if (subdevice >= pstr->substream_count) {
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err = -ENXIO;
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goto _error;
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}
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for (substream = pstr->substream; substream;
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substream = substream->next)
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if (substream->number == (int)subdevice)
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break;
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if (substream == NULL) {
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err = -ENXIO;
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goto _error;
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}
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mutex_lock(&pcm->open_mutex);
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err = snd_pcm_info_user(substream, info);
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mutex_unlock(&pcm->open_mutex);
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_error:
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mutex_unlock(®ister_mutex);
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return err;
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}
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case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE:
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{
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int val;
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if (get_user(val, (int __user *)arg))
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return -EFAULT;
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control->preferred_subdevice[SND_CTL_SUBDEV_PCM] = val;
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return 0;
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}
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}
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return -ENOIOCTLCMD;
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}
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#define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
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static char *snd_pcm_format_names[] = {
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FORMAT(S8),
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FORMAT(U8),
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FORMAT(S16_LE),
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FORMAT(S16_BE),
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FORMAT(U16_LE),
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FORMAT(U16_BE),
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FORMAT(S24_LE),
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FORMAT(S24_BE),
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FORMAT(U24_LE),
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FORMAT(U24_BE),
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FORMAT(S32_LE),
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FORMAT(S32_BE),
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FORMAT(U32_LE),
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FORMAT(U32_BE),
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FORMAT(FLOAT_LE),
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FORMAT(FLOAT_BE),
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FORMAT(FLOAT64_LE),
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FORMAT(FLOAT64_BE),
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FORMAT(IEC958_SUBFRAME_LE),
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FORMAT(IEC958_SUBFRAME_BE),
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FORMAT(MU_LAW),
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FORMAT(A_LAW),
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FORMAT(IMA_ADPCM),
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FORMAT(MPEG),
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FORMAT(GSM),
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FORMAT(SPECIAL),
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FORMAT(S24_3LE),
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FORMAT(S24_3BE),
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FORMAT(U24_3LE),
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FORMAT(U24_3BE),
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FORMAT(S20_3LE),
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FORMAT(S20_3BE),
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FORMAT(U20_3LE),
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FORMAT(U20_3BE),
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FORMAT(S18_3LE),
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FORMAT(S18_3BE),
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FORMAT(U18_3LE),
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FORMAT(U18_3BE),
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FORMAT(G723_24),
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FORMAT(G723_24_1B),
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FORMAT(G723_40),
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FORMAT(G723_40_1B),
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FORMAT(DSD_U8),
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FORMAT(DSD_U16_LE),
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FORMAT(DSD_U32_LE),
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FORMAT(DSD_U16_BE),
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FORMAT(DSD_U32_BE),
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};
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/**
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* snd_pcm_format_name - Return a name string for the given PCM format
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* @format: PCM format
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*/
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const char *snd_pcm_format_name(snd_pcm_format_t format)
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{
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if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names))
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return "Unknown";
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return snd_pcm_format_names[(__force unsigned int)format];
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}
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EXPORT_SYMBOL_GPL(snd_pcm_format_name);
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#ifdef CONFIG_SND_VERBOSE_PROCFS
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#define STATE(v) [SNDRV_PCM_STATE_##v] = #v
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#define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
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#define READY(v) [SNDRV_PCM_READY_##v] = #v
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#define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
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#define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
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#define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
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#define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
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#define START(v) [SNDRV_PCM_START_##v] = #v
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#define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
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static char *snd_pcm_stream_names[] = {
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STREAM(PLAYBACK),
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STREAM(CAPTURE),
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};
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static char *snd_pcm_state_names[] = {
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STATE(OPEN),
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STATE(SETUP),
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STATE(PREPARED),
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STATE(RUNNING),
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STATE(XRUN),
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STATE(DRAINING),
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STATE(PAUSED),
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STATE(SUSPENDED),
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};
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static char *snd_pcm_access_names[] = {
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ACCESS(MMAP_INTERLEAVED),
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ACCESS(MMAP_NONINTERLEAVED),
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ACCESS(MMAP_COMPLEX),
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ACCESS(RW_INTERLEAVED),
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ACCESS(RW_NONINTERLEAVED),
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};
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static char *snd_pcm_subformat_names[] = {
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SUBFORMAT(STD),
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};
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static char *snd_pcm_tstamp_mode_names[] = {
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TSTAMP(NONE),
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TSTAMP(ENABLE),
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};
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static const char *snd_pcm_stream_name(int stream)
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{
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return snd_pcm_stream_names[stream];
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}
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static const char *snd_pcm_access_name(snd_pcm_access_t access)
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{
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return snd_pcm_access_names[(__force int)access];
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}
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static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
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{
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return snd_pcm_subformat_names[(__force int)subformat];
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}
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static const char *snd_pcm_tstamp_mode_name(int mode)
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{
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return snd_pcm_tstamp_mode_names[mode];
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}
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static const char *snd_pcm_state_name(snd_pcm_state_t state)
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{
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return snd_pcm_state_names[(__force int)state];
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}
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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#include <linux/soundcard.h>
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static const char *snd_pcm_oss_format_name(int format)
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{
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switch (format) {
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case AFMT_MU_LAW:
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return "MU_LAW";
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case AFMT_A_LAW:
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return "A_LAW";
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case AFMT_IMA_ADPCM:
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return "IMA_ADPCM";
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case AFMT_U8:
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return "U8";
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case AFMT_S16_LE:
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return "S16_LE";
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case AFMT_S16_BE:
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return "S16_BE";
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case AFMT_S8:
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return "S8";
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case AFMT_U16_LE:
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return "U16_LE";
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case AFMT_U16_BE:
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return "U16_BE";
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case AFMT_MPEG:
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return "MPEG";
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default:
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return "unknown";
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}
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}
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#endif
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static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream,
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struct snd_info_buffer *buffer)
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{
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struct snd_pcm_info *info;
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int err;
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if (! substream)
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return;
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info = kmalloc(sizeof(*info), GFP_KERNEL);
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if (!info)
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return;
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err = snd_pcm_info(substream, info);
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if (err < 0) {
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snd_iprintf(buffer, "error %d\n", err);
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kfree(info);
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return;
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}
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snd_iprintf(buffer, "card: %d\n", info->card);
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snd_iprintf(buffer, "device: %d\n", info->device);
|
|
snd_iprintf(buffer, "subdevice: %d\n", info->subdevice);
|
|
snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream));
|
|
snd_iprintf(buffer, "id: %s\n", info->id);
|
|
snd_iprintf(buffer, "name: %s\n", info->name);
|
|
snd_iprintf(buffer, "subname: %s\n", info->subname);
|
|
snd_iprintf(buffer, "class: %d\n", info->dev_class);
|
|
snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass);
|
|
snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count);
|
|
snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail);
|
|
kfree(info);
|
|
}
|
|
|
|
static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream,
|
|
buffer);
|
|
}
|
|
|
|
static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
snd_pcm_proc_info_read(entry->private_data, buffer);
|
|
}
|
|
|
|
static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_substream *substream = entry->private_data;
|
|
struct snd_pcm_runtime *runtime;
|
|
|
|
mutex_lock(&substream->pcm->open_mutex);
|
|
runtime = substream->runtime;
|
|
if (!runtime) {
|
|
snd_iprintf(buffer, "closed\n");
|
|
goto unlock;
|
|
}
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
|
|
snd_iprintf(buffer, "no setup\n");
|
|
goto unlock;
|
|
}
|
|
snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access));
|
|
snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format));
|
|
snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat));
|
|
snd_iprintf(buffer, "channels: %u\n", runtime->channels);
|
|
snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den);
|
|
snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size);
|
|
snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size);
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
if (substream->oss.oss) {
|
|
snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format));
|
|
snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels);
|
|
snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate);
|
|
snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes);
|
|
snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods);
|
|
snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames);
|
|
}
|
|
#endif
|
|
unlock:
|
|
mutex_unlock(&substream->pcm->open_mutex);
|
|
}
|
|
|
|
static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_substream *substream = entry->private_data;
|
|
struct snd_pcm_runtime *runtime;
|
|
|
|
mutex_lock(&substream->pcm->open_mutex);
|
|
runtime = substream->runtime;
|
|
if (!runtime) {
|
|
snd_iprintf(buffer, "closed\n");
|
|
goto unlock;
|
|
}
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
|
|
snd_iprintf(buffer, "no setup\n");
|
|
goto unlock;
|
|
}
|
|
snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode));
|
|
snd_iprintf(buffer, "period_step: %u\n", runtime->period_step);
|
|
snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min);
|
|
snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold);
|
|
snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold);
|
|
snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold);
|
|
snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size);
|
|
snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary);
|
|
unlock:
|
|
mutex_unlock(&substream->pcm->open_mutex);
|
|
}
|
|
|
|
static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_substream *substream = entry->private_data;
|
|
struct snd_pcm_runtime *runtime;
|
|
struct snd_pcm_status status;
|
|
int err;
|
|
|
|
mutex_lock(&substream->pcm->open_mutex);
|
|
runtime = substream->runtime;
|
|
if (!runtime) {
|
|
snd_iprintf(buffer, "closed\n");
|
|
goto unlock;
|
|
}
|
|
memset(&status, 0, sizeof(status));
|
|
err = snd_pcm_status(substream, &status);
|
|
if (err < 0) {
|
|
snd_iprintf(buffer, "error %d\n", err);
|
|
goto unlock;
|
|
}
|
|
snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state));
|
|
snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid));
|
|
snd_iprintf(buffer, "trigger_time: %ld.%09ld\n",
|
|
status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec);
|
|
snd_iprintf(buffer, "tstamp : %ld.%09ld\n",
|
|
status.tstamp.tv_sec, status.tstamp.tv_nsec);
|
|
snd_iprintf(buffer, "delay : %ld\n", status.delay);
|
|
snd_iprintf(buffer, "avail : %ld\n", status.avail);
|
|
snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max);
|
|
snd_iprintf(buffer, "-----\n");
|
|
snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr);
|
|
snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
|
|
unlock:
|
|
mutex_unlock(&substream->pcm->open_mutex);
|
|
}
|
|
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
static void snd_pcm_xrun_injection_write(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_substream *substream = entry->private_data;
|
|
|
|
snd_pcm_stop_xrun(substream);
|
|
}
|
|
|
|
static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_str *pstr = entry->private_data;
|
|
snd_iprintf(buffer, "%d\n", pstr->xrun_debug);
|
|
}
|
|
|
|
static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_str *pstr = entry->private_data;
|
|
char line[64];
|
|
if (!snd_info_get_line(buffer, line, sizeof(line)))
|
|
pstr->xrun_debug = simple_strtoul(line, NULL, 10);
|
|
}
|
|
#endif
|
|
|
|
static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr)
|
|
{
|
|
struct snd_pcm *pcm = pstr->pcm;
|
|
struct snd_info_entry *entry;
|
|
char name[16];
|
|
|
|
sprintf(name, "pcm%i%c", pcm->device,
|
|
pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c');
|
|
entry = snd_info_create_card_entry(pcm->card, name,
|
|
pcm->card->proc_root);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
entry->mode = S_IFDIR | 0555;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
return -ENOMEM;
|
|
}
|
|
pstr->proc_root = entry;
|
|
entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root);
|
|
if (entry) {
|
|
snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read);
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
pstr->proc_info_entry = entry;
|
|
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
entry = snd_info_create_card_entry(pcm->card, "xrun_debug",
|
|
pstr->proc_root);
|
|
if (entry) {
|
|
entry->c.text.read = snd_pcm_xrun_debug_read;
|
|
entry->c.text.write = snd_pcm_xrun_debug_write;
|
|
entry->mode |= 0200;
|
|
entry->private_data = pstr;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
pstr->proc_xrun_debug_entry = entry;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr)
|
|
{
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
snd_info_free_entry(pstr->proc_xrun_debug_entry);
|
|
pstr->proc_xrun_debug_entry = NULL;
|
|
#endif
|
|
snd_info_free_entry(pstr->proc_info_entry);
|
|
pstr->proc_info_entry = NULL;
|
|
snd_info_free_entry(pstr->proc_root);
|
|
pstr->proc_root = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_info_entry *entry;
|
|
struct snd_card *card;
|
|
char name[16];
|
|
|
|
card = substream->pcm->card;
|
|
|
|
sprintf(name, "sub%i", substream->number);
|
|
entry = snd_info_create_card_entry(card, name,
|
|
substream->pstr->proc_root);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
entry->mode = S_IFDIR | 0555;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
return -ENOMEM;
|
|
}
|
|
substream->proc_root = entry;
|
|
entry = snd_info_create_card_entry(card, "info", substream->proc_root);
|
|
if (entry) {
|
|
snd_info_set_text_ops(entry, substream,
|
|
snd_pcm_substream_proc_info_read);
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
substream->proc_info_entry = entry;
|
|
entry = snd_info_create_card_entry(card, "hw_params",
|
|
substream->proc_root);
|
|
if (entry) {
|
|
snd_info_set_text_ops(entry, substream,
|
|
snd_pcm_substream_proc_hw_params_read);
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
substream->proc_hw_params_entry = entry;
|
|
entry = snd_info_create_card_entry(card, "sw_params",
|
|
substream->proc_root);
|
|
if (entry) {
|
|
snd_info_set_text_ops(entry, substream,
|
|
snd_pcm_substream_proc_sw_params_read);
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
substream->proc_sw_params_entry = entry;
|
|
entry = snd_info_create_card_entry(card, "status",
|
|
substream->proc_root);
|
|
if (entry) {
|
|
snd_info_set_text_ops(entry, substream,
|
|
snd_pcm_substream_proc_status_read);
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
substream->proc_status_entry = entry;
|
|
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
entry = snd_info_create_card_entry(card, "xrun_injection",
|
|
substream->proc_root);
|
|
if (entry) {
|
|
entry->private_data = substream;
|
|
entry->c.text.read = NULL;
|
|
entry->c.text.write = snd_pcm_xrun_injection_write;
|
|
entry->mode = S_IFREG | 0200;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
substream->proc_xrun_injection_entry = entry;
|
|
#endif /* CONFIG_SND_PCM_XRUN_DEBUG */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream)
|
|
{
|
|
snd_info_free_entry(substream->proc_info_entry);
|
|
substream->proc_info_entry = NULL;
|
|
snd_info_free_entry(substream->proc_hw_params_entry);
|
|
substream->proc_hw_params_entry = NULL;
|
|
snd_info_free_entry(substream->proc_sw_params_entry);
|
|
substream->proc_sw_params_entry = NULL;
|
|
snd_info_free_entry(substream->proc_status_entry);
|
|
substream->proc_status_entry = NULL;
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
snd_info_free_entry(substream->proc_xrun_injection_entry);
|
|
substream->proc_xrun_injection_entry = NULL;
|
|
#endif
|
|
snd_info_free_entry(substream->proc_root);
|
|
substream->proc_root = NULL;
|
|
return 0;
|
|
}
|
|
#else /* !CONFIG_SND_VERBOSE_PROCFS */
|
|
static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; }
|
|
static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; }
|
|
static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; }
|
|
static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; }
|
|
#endif /* CONFIG_SND_VERBOSE_PROCFS */
|
|
|
|
static const struct attribute_group *pcm_dev_attr_groups[];
|
|
|
|
/**
|
|
* snd_pcm_new_stream - create a new PCM stream
|
|
* @pcm: the pcm instance
|
|
* @stream: the stream direction, SNDRV_PCM_STREAM_XXX
|
|
* @substream_count: the number of substreams
|
|
*
|
|
* Creates a new stream for the pcm.
|
|
* The corresponding stream on the pcm must have been empty before
|
|
* calling this, i.e. zero must be given to the argument of
|
|
* snd_pcm_new().
|
|
*
|
|
* Return: Zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
|
|
{
|
|
int idx, err;
|
|
struct snd_pcm_str *pstr = &pcm->streams[stream];
|
|
struct snd_pcm_substream *substream, *prev;
|
|
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
mutex_init(&pstr->oss.setup_mutex);
|
|
#endif
|
|
pstr->stream = stream;
|
|
pstr->pcm = pcm;
|
|
pstr->substream_count = substream_count;
|
|
if (!substream_count)
|
|
return 0;
|
|
|
|
snd_device_initialize(&pstr->dev, pcm->card);
|
|
pstr->dev.groups = pcm_dev_attr_groups;
|
|
dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device,
|
|
stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c');
|
|
|
|
if (!pcm->internal) {
|
|
err = snd_pcm_stream_proc_init(pstr);
|
|
if (err < 0) {
|
|
pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n");
|
|
return err;
|
|
}
|
|
}
|
|
prev = NULL;
|
|
for (idx = 0, prev = NULL; idx < substream_count; idx++) {
|
|
substream = kzalloc(sizeof(*substream), GFP_KERNEL);
|
|
if (!substream)
|
|
return -ENOMEM;
|
|
substream->pcm = pcm;
|
|
substream->pstr = pstr;
|
|
substream->number = idx;
|
|
substream->stream = stream;
|
|
sprintf(substream->name, "subdevice #%i", idx);
|
|
substream->buffer_bytes_max = UINT_MAX;
|
|
if (prev == NULL)
|
|
pstr->substream = substream;
|
|
else
|
|
prev->next = substream;
|
|
|
|
if (!pcm->internal) {
|
|
err = snd_pcm_substream_proc_init(substream);
|
|
if (err < 0) {
|
|
pcm_err(pcm,
|
|
"Error in snd_pcm_stream_proc_init\n");
|
|
if (prev == NULL)
|
|
pstr->substream = NULL;
|
|
else
|
|
prev->next = NULL;
|
|
kfree(substream);
|
|
return err;
|
|
}
|
|
}
|
|
substream->group = &substream->self_group;
|
|
spin_lock_init(&substream->self_group.lock);
|
|
spin_lock_init(&substream->runtime_lock);
|
|
mutex_init(&substream->self_group.mutex);
|
|
INIT_LIST_HEAD(&substream->self_group.substreams);
|
|
list_add_tail(&substream->link_list, &substream->self_group.substreams);
|
|
atomic_set(&substream->mmap_count, 0);
|
|
prev = substream;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(snd_pcm_new_stream);
|
|
|
|
static int _snd_pcm_new(struct snd_card *card, const char *id, int device,
|
|
int playback_count, int capture_count, bool internal,
|
|
struct snd_pcm **rpcm)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
int err;
|
|
static struct snd_device_ops ops = {
|
|
.dev_free = snd_pcm_dev_free,
|
|
.dev_register = snd_pcm_dev_register,
|
|
.dev_disconnect = snd_pcm_dev_disconnect,
|
|
};
|
|
static struct snd_device_ops internal_ops = {
|
|
.dev_free = snd_pcm_dev_free,
|
|
};
|
|
|
|
if (snd_BUG_ON(!card))
|
|
return -ENXIO;
|
|
if (rpcm)
|
|
*rpcm = NULL;
|
|
pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
|
|
if (!pcm)
|
|
return -ENOMEM;
|
|
pcm->card = card;
|
|
pcm->device = device;
|
|
pcm->internal = internal;
|
|
mutex_init(&pcm->open_mutex);
|
|
init_waitqueue_head(&pcm->open_wait);
|
|
INIT_LIST_HEAD(&pcm->list);
|
|
if (id)
|
|
strlcpy(pcm->id, id, sizeof(pcm->id));
|
|
|
|
err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
|
playback_count);
|
|
if (err < 0)
|
|
goto free_pcm;
|
|
|
|
err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count);
|
|
if (err < 0)
|
|
goto free_pcm;
|
|
|
|
err = snd_device_new(card, SNDRV_DEV_PCM, pcm,
|
|
internal ? &internal_ops : &ops);
|
|
if (err < 0)
|
|
goto free_pcm;
|
|
|
|
if (rpcm)
|
|
*rpcm = pcm;
|
|
return 0;
|
|
|
|
free_pcm:
|
|
snd_pcm_free(pcm);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_new - create a new PCM instance
|
|
* @card: the card instance
|
|
* @id: the id string
|
|
* @device: the device index (zero based)
|
|
* @playback_count: the number of substreams for playback
|
|
* @capture_count: the number of substreams for capture
|
|
* @rpcm: the pointer to store the new pcm instance
|
|
*
|
|
* Creates a new PCM instance.
|
|
*
|
|
* The pcm operators have to be set afterwards to the new instance
|
|
* via snd_pcm_set_ops().
|
|
*
|
|
* Return: Zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_pcm_new(struct snd_card *card, const char *id, int device,
|
|
int playback_count, int capture_count, struct snd_pcm **rpcm)
|
|
{
|
|
return _snd_pcm_new(card, id, device, playback_count, capture_count,
|
|
false, rpcm);
|
|
}
|
|
EXPORT_SYMBOL(snd_pcm_new);
|
|
|
|
/**
|
|
* snd_pcm_new_internal - create a new internal PCM instance
|
|
* @card: the card instance
|
|
* @id: the id string
|
|
* @device: the device index (zero based - shared with normal PCMs)
|
|
* @playback_count: the number of substreams for playback
|
|
* @capture_count: the number of substreams for capture
|
|
* @rpcm: the pointer to store the new pcm instance
|
|
*
|
|
* Creates a new internal PCM instance with no userspace device or procfs
|
|
* entries. This is used by ASoC Back End PCMs in order to create a PCM that
|
|
* will only be used internally by kernel drivers. i.e. it cannot be opened
|
|
* by userspace. It provides existing ASoC components drivers with a substream
|
|
* and access to any private data.
|
|
*
|
|
* The pcm operators have to be set afterwards to the new instance
|
|
* via snd_pcm_set_ops().
|
|
*
|
|
* Return: Zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
|
|
int playback_count, int capture_count,
|
|
struct snd_pcm **rpcm)
|
|
{
|
|
return _snd_pcm_new(card, id, device, playback_count, capture_count,
|
|
true, rpcm);
|
|
}
|
|
EXPORT_SYMBOL(snd_pcm_new_internal);
|
|
|
|
static void free_chmap(struct snd_pcm_str *pstr)
|
|
{
|
|
if (pstr->chmap_kctl) {
|
|
struct snd_card *card = pstr->pcm->card;
|
|
|
|
down_write(&card->controls_rwsem);
|
|
snd_ctl_remove(card, pstr->chmap_kctl);
|
|
up_write(&card->controls_rwsem);
|
|
pstr->chmap_kctl = NULL;
|
|
}
|
|
if (pstr->vol_kctl) {
|
|
snd_ctl_remove(pstr->pcm->card, pstr->vol_kctl);
|
|
pstr->vol_kctl = NULL;
|
|
}
|
|
if (pstr->usr_kctl) {
|
|
snd_ctl_remove(pstr->pcm->card, pstr->usr_kctl);
|
|
pstr->usr_kctl = NULL;
|
|
}
|
|
}
|
|
|
|
static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
|
|
{
|
|
struct snd_pcm_substream *substream, *substream_next;
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
struct snd_pcm_oss_setup *setup, *setupn;
|
|
#endif
|
|
substream = pstr->substream;
|
|
while (substream) {
|
|
substream_next = substream->next;
|
|
snd_pcm_timer_done(substream);
|
|
snd_pcm_substream_proc_done(substream);
|
|
kfree(substream);
|
|
substream = substream_next;
|
|
}
|
|
snd_pcm_stream_proc_done(pstr);
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
for (setup = pstr->oss.setup_list; setup; setup = setupn) {
|
|
setupn = setup->next;
|
|
kfree(setup->task_name);
|
|
kfree(setup);
|
|
}
|
|
#endif
|
|
free_chmap(pstr);
|
|
if (pstr->substream_count)
|
|
put_device(&pstr->dev);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
#define pcm_call_notify(pcm, call) \
|
|
do { \
|
|
struct snd_pcm_notify *_notify; \
|
|
list_for_each_entry(_notify, &snd_pcm_notify_list, list) \
|
|
_notify->call(pcm); \
|
|
} while (0)
|
|
#else
|
|
#define pcm_call_notify(pcm, call) do {} while (0)
|
|
#endif
|
|
|
|
static int snd_pcm_free(struct snd_pcm *pcm)
|
|
{
|
|
if (!pcm)
|
|
return 0;
|
|
if (!pcm->internal)
|
|
pcm_call_notify(pcm, n_unregister);
|
|
if (pcm->private_free)
|
|
pcm->private_free(pcm);
|
|
snd_pcm_lib_preallocate_free_for_all(pcm);
|
|
snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]);
|
|
snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]);
|
|
kfree(pcm);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_dev_free(struct snd_device *device)
|
|
{
|
|
struct snd_pcm *pcm = device->device_data;
|
|
return snd_pcm_free(pcm);
|
|
}
|
|
|
|
int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
|
|
struct file *file,
|
|
struct snd_pcm_substream **rsubstream)
|
|
{
|
|
struct snd_pcm_str * pstr;
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
struct snd_card *card;
|
|
int prefer_subdevice;
|
|
size_t size;
|
|
|
|
if (snd_BUG_ON(!pcm || !rsubstream))
|
|
return -ENXIO;
|
|
if (snd_BUG_ON(stream != SNDRV_PCM_STREAM_PLAYBACK &&
|
|
stream != SNDRV_PCM_STREAM_CAPTURE))
|
|
return -EINVAL;
|
|
*rsubstream = NULL;
|
|
pstr = &pcm->streams[stream];
|
|
if (pstr->substream == NULL || pstr->substream_count == 0)
|
|
return -ENODEV;
|
|
|
|
card = pcm->card;
|
|
prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM);
|
|
|
|
if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
|
|
int opposite = !stream;
|
|
|
|
for (substream = pcm->streams[opposite].substream; substream;
|
|
substream = substream->next) {
|
|
if (SUBSTREAM_BUSY(substream))
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
|
|
if (file->f_flags & O_APPEND) {
|
|
if (prefer_subdevice < 0) {
|
|
if (pstr->substream_count > 1)
|
|
return -EINVAL; /* must be unique */
|
|
substream = pstr->substream;
|
|
} else {
|
|
for (substream = pstr->substream; substream;
|
|
substream = substream->next)
|
|
if (substream->number == prefer_subdevice)
|
|
break;
|
|
}
|
|
if (! substream)
|
|
return -ENODEV;
|
|
if (! SUBSTREAM_BUSY(substream))
|
|
return -EBADFD;
|
|
substream->ref_count++;
|
|
*rsubstream = substream;
|
|
return 0;
|
|
}
|
|
|
|
for (substream = pstr->substream; substream; substream = substream->next) {
|
|
if (!SUBSTREAM_BUSY(substream) &&
|
|
(prefer_subdevice == -1 ||
|
|
substream->number == prefer_subdevice))
|
|
break;
|
|
}
|
|
if (substream == NULL)
|
|
return -EAGAIN;
|
|
|
|
runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
|
|
if (runtime == NULL)
|
|
return -ENOMEM;
|
|
|
|
size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status));
|
|
runtime->status = snd_malloc_pages(size, GFP_KERNEL);
|
|
if (runtime->status == NULL) {
|
|
kfree(runtime);
|
|
return -ENOMEM;
|
|
}
|
|
memset((void*)runtime->status, 0, size);
|
|
|
|
size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control));
|
|
runtime->control = snd_malloc_pages(size, GFP_KERNEL);
|
|
if (runtime->control == NULL) {
|
|
snd_free_pages((void*)runtime->status,
|
|
PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)));
|
|
kfree(runtime);
|
|
return -ENOMEM;
|
|
}
|
|
memset((void*)runtime->control, 0, size);
|
|
|
|
init_waitqueue_head(&runtime->sleep);
|
|
init_waitqueue_head(&runtime->tsleep);
|
|
|
|
runtime->status->state = SNDRV_PCM_STATE_OPEN;
|
|
mutex_init(&runtime->buffer_mutex);
|
|
atomic_set(&runtime->buffer_accessing, 0);
|
|
|
|
substream->runtime = runtime;
|
|
substream->private_data = pcm->private_data;
|
|
substream->ref_count = 1;
|
|
substream->f_flags = file->f_flags;
|
|
substream->pid = get_pid(task_pid(current));
|
|
pstr->substream_opened++;
|
|
*rsubstream = substream;
|
|
return 0;
|
|
}
|
|
|
|
void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
unsigned long flags = 0;
|
|
|
|
if (PCM_RUNTIME_CHECK(substream))
|
|
return;
|
|
spin_lock_irqsave(&substream->runtime_lock, flags);
|
|
runtime = substream->runtime;
|
|
if (runtime->private_free != NULL)
|
|
runtime->private_free(runtime);
|
|
snd_free_pages((void*)runtime->status,
|
|
PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)));
|
|
snd_free_pages((void*)runtime->control,
|
|
PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)));
|
|
kfree(runtime->hw_constraints.rules);
|
|
/* Avoid concurrent access to runtime via PCM timer interface */
|
|
if (substream->timer)
|
|
spin_lock_irq(&substream->timer->lock);
|
|
substream->runtime = NULL;
|
|
if (substream->timer)
|
|
spin_unlock_irq(&substream->timer->lock);
|
|
mutex_destroy(&runtime->buffer_mutex);
|
|
kfree(runtime);
|
|
put_pid(substream->pid);
|
|
substream->pid = NULL;
|
|
substream->pstr->substream_opened--;
|
|
spin_unlock_irqrestore(&substream->runtime_lock, flags);
|
|
}
|
|
|
|
static ssize_t show_pcm_class(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct snd_pcm_str *pstr = container_of(dev, struct snd_pcm_str, dev);
|
|
struct snd_pcm *pcm = pstr->pcm;
|
|
const char *str;
|
|
static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = {
|
|
[SNDRV_PCM_CLASS_GENERIC] = "generic",
|
|
[SNDRV_PCM_CLASS_MULTI] = "multi",
|
|
[SNDRV_PCM_CLASS_MODEM] = "modem",
|
|
[SNDRV_PCM_CLASS_DIGITIZER] = "digitizer",
|
|
};
|
|
|
|
if (pcm->dev_class > SNDRV_PCM_CLASS_LAST)
|
|
str = "none";
|
|
else
|
|
str = strs[pcm->dev_class];
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", str);
|
|
}
|
|
|
|
static DEVICE_ATTR(pcm_class, 0444, show_pcm_class, NULL);
|
|
static struct attribute *pcm_dev_attrs[] = {
|
|
&dev_attr_pcm_class.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group pcm_dev_attr_group = {
|
|
.attrs = pcm_dev_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *pcm_dev_attr_groups[] = {
|
|
&pcm_dev_attr_group,
|
|
NULL
|
|
};
|
|
|
|
static int snd_pcm_dev_register(struct snd_device *device)
|
|
{
|
|
int cidx, err;
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm *pcm;
|
|
|
|
if (snd_BUG_ON(!device || !device->device_data))
|
|
return -ENXIO;
|
|
pcm = device->device_data;
|
|
|
|
mutex_lock(®ister_mutex);
|
|
err = snd_pcm_add(pcm);
|
|
if (err)
|
|
goto unlock;
|
|
for (cidx = 0; cidx < 2; cidx++) {
|
|
int devtype = -1;
|
|
if (pcm->streams[cidx].substream == NULL)
|
|
continue;
|
|
switch (cidx) {
|
|
case SNDRV_PCM_STREAM_PLAYBACK:
|
|
devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
|
|
break;
|
|
case SNDRV_PCM_STREAM_CAPTURE:
|
|
devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
|
|
break;
|
|
}
|
|
/* register pcm */
|
|
err = snd_register_device(devtype, pcm->card, pcm->device,
|
|
&snd_pcm_f_ops[cidx], pcm,
|
|
&pcm->streams[cidx].dev);
|
|
if (err < 0) {
|
|
list_del_init(&pcm->list);
|
|
goto unlock;
|
|
}
|
|
|
|
for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
|
|
snd_pcm_timer_init(substream);
|
|
}
|
|
|
|
pcm_call_notify(pcm, n_register);
|
|
|
|
unlock:
|
|
mutex_unlock(®ister_mutex);
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_dev_disconnect(struct snd_device *device)
|
|
{
|
|
struct snd_pcm *pcm = device->device_data;
|
|
struct snd_pcm_substream *substream;
|
|
int cidx;
|
|
|
|
mutex_lock(®ister_mutex);
|
|
mutex_lock(&pcm->open_mutex);
|
|
wake_up(&pcm->open_wait);
|
|
list_del_init(&pcm->list);
|
|
for (cidx = 0; cidx < 2; cidx++) {
|
|
for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) {
|
|
snd_pcm_stream_lock_irq(substream);
|
|
if (substream->runtime) {
|
|
if (snd_pcm_running(substream))
|
|
snd_pcm_stop(substream,
|
|
SNDRV_PCM_STATE_DISCONNECTED);
|
|
/* to be sure, set the state unconditionally */
|
|
substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED;
|
|
wake_up(&substream->runtime->sleep);
|
|
wake_up(&substream->runtime->tsleep);
|
|
}
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
}
|
|
}
|
|
|
|
pcm_call_notify(pcm, n_disconnect);
|
|
for (cidx = 0; cidx < 2; cidx++) {
|
|
snd_unregister_device(&pcm->streams[cidx].dev);
|
|
free_chmap(&pcm->streams[cidx]);
|
|
}
|
|
mutex_unlock(&pcm->open_mutex);
|
|
mutex_unlock(®ister_mutex);
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
/**
|
|
* snd_pcm_notify - Add/remove the notify list
|
|
* @notify: PCM notify list
|
|
* @nfree: 0 = register, 1 = unregister
|
|
*
|
|
* This adds the given notifier to the global list so that the callback is
|
|
* called for each registered PCM devices. This exists only for PCM OSS
|
|
* emulation, so far.
|
|
*/
|
|
int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
|
|
if (snd_BUG_ON(!notify ||
|
|
!notify->n_register ||
|
|
!notify->n_unregister ||
|
|
!notify->n_disconnect))
|
|
return -EINVAL;
|
|
mutex_lock(®ister_mutex);
|
|
if (nfree) {
|
|
list_del(¬ify->list);
|
|
list_for_each_entry(pcm, &snd_pcm_devices, list)
|
|
notify->n_unregister(pcm);
|
|
} else {
|
|
list_add_tail(¬ify->list, &snd_pcm_notify_list);
|
|
list_for_each_entry(pcm, &snd_pcm_devices, list)
|
|
notify->n_register(pcm);
|
|
}
|
|
mutex_unlock(®ister_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(snd_pcm_notify);
|
|
#endif /* CONFIG_SND_PCM_OSS */
|
|
|
|
#ifdef CONFIG_SND_PROC_FS
|
|
/*
|
|
* Info interface
|
|
*/
|
|
|
|
static void snd_pcm_proc_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
|
|
mutex_lock(®ister_mutex);
|
|
list_for_each_entry(pcm, &snd_pcm_devices, list) {
|
|
snd_iprintf(buffer, "%02i-%02i: %s : %s",
|
|
pcm->card->number, pcm->device, pcm->id, pcm->name);
|
|
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
|
|
snd_iprintf(buffer, " : playback %i",
|
|
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count);
|
|
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream)
|
|
snd_iprintf(buffer, " : capture %i",
|
|
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count);
|
|
snd_iprintf(buffer, "\n");
|
|
}
|
|
mutex_unlock(®ister_mutex);
|
|
}
|
|
|
|
static struct snd_info_entry *snd_pcm_proc_entry;
|
|
|
|
static void snd_pcm_proc_init(void)
|
|
{
|
|
struct snd_info_entry *entry;
|
|
|
|
entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL);
|
|
if (entry) {
|
|
snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read);
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
snd_pcm_proc_entry = entry;
|
|
}
|
|
|
|
static void snd_pcm_proc_done(void)
|
|
{
|
|
snd_info_free_entry(snd_pcm_proc_entry);
|
|
}
|
|
|
|
#else /* !CONFIG_SND_PROC_FS */
|
|
#define snd_pcm_proc_init()
|
|
#define snd_pcm_proc_done()
|
|
#endif /* CONFIG_SND_PROC_FS */
|
|
|
|
|
|
/*
|
|
* ENTRY functions
|
|
*/
|
|
|
|
static int __init alsa_pcm_init(void)
|
|
{
|
|
snd_ctl_register_ioctl(snd_pcm_control_ioctl);
|
|
snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl);
|
|
snd_pcm_proc_init();
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_pcm_exit(void)
|
|
{
|
|
snd_ctl_unregister_ioctl(snd_pcm_control_ioctl);
|
|
snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl);
|
|
snd_pcm_proc_done();
|
|
}
|
|
|
|
module_init(alsa_pcm_init)
|
|
module_exit(alsa_pcm_exit)
|