/* * tascam-hwdep.c - a part of driver for TASCAM FireWire series * * Copyright (c) 2015 Takashi Sakamoto * * Licensed under the terms of the GNU General Public License, version 2. */ /* * This codes give three functionality. * * 1.get firewire node information * 2.get notification about starting/stopping stream * 3.lock/unlock stream */ #include "tascam.h" static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, loff_t *offset) { struct snd_tscm *tscm = hwdep->private_data; DEFINE_WAIT(wait); union snd_firewire_event event = { .lock_status.type = SNDRV_FIREWIRE_EVENT_LOCK_STATUS, }; spin_lock_irq(&tscm->lock); while (!tscm->dev_lock_changed) { prepare_to_wait(&tscm->hwdep_wait, &wait, TASK_INTERRUPTIBLE); spin_unlock_irq(&tscm->lock); schedule(); finish_wait(&tscm->hwdep_wait, &wait); if (signal_pending(current)) return -ERESTARTSYS; spin_lock_irq(&tscm->lock); } event.lock_status.status = (tscm->dev_lock_count > 0); tscm->dev_lock_changed = false; spin_unlock_irq(&tscm->lock); count = min_t(long, count, sizeof(event.lock_status)); if (copy_to_user(buf, &event, count)) return -EFAULT; return count; } static unsigned int hwdep_poll(struct snd_hwdep *hwdep, struct file *file, poll_table *wait) { struct snd_tscm *tscm = hwdep->private_data; unsigned int events; poll_wait(file, &tscm->hwdep_wait, wait); spin_lock_irq(&tscm->lock); if (tscm->dev_lock_changed) events = POLLIN | POLLRDNORM; else events = 0; spin_unlock_irq(&tscm->lock); return events; } static int hwdep_get_info(struct snd_tscm *tscm, void __user *arg) { struct fw_device *dev = fw_parent_device(tscm->unit); struct snd_firewire_get_info info; memset(&info, 0, sizeof(info)); info.type = SNDRV_FIREWIRE_TYPE_TASCAM; info.card = dev->card->index; *(__be32 *)&info.guid[0] = cpu_to_be32(dev->config_rom[3]); *(__be32 *)&info.guid[4] = cpu_to_be32(dev->config_rom[4]); strlcpy(info.device_name, dev_name(&dev->device), sizeof(info.device_name)); if (copy_to_user(arg, &info, sizeof(info))) return -EFAULT; return 0; } static int hwdep_lock(struct snd_tscm *tscm) { int err; spin_lock_irq(&tscm->lock); if (tscm->dev_lock_count == 0) { tscm->dev_lock_count = -1; err = 0; } else { err = -EBUSY; } spin_unlock_irq(&tscm->lock); return err; } static int hwdep_unlock(struct snd_tscm *tscm) { int err; spin_lock_irq(&tscm->lock); if (tscm->dev_lock_count == -1) { tscm->dev_lock_count = 0; err = 0; } else { err = -EBADFD; } spin_unlock_irq(&tscm->lock); return err; } static int hwdep_release(struct snd_hwdep *hwdep, struct file *file) { struct snd_tscm *tscm = hwdep->private_data; spin_lock_irq(&tscm->lock); if (tscm->dev_lock_count == -1) tscm->dev_lock_count = 0; spin_unlock_irq(&tscm->lock); return 0; } static int hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file, unsigned int cmd, unsigned long arg) { struct snd_tscm *tscm = hwdep->private_data; switch (cmd) { case SNDRV_FIREWIRE_IOCTL_GET_INFO: return hwdep_get_info(tscm, (void __user *)arg); case SNDRV_FIREWIRE_IOCTL_LOCK: return hwdep_lock(tscm); case SNDRV_FIREWIRE_IOCTL_UNLOCK: return hwdep_unlock(tscm); default: return -ENOIOCTLCMD; } } #ifdef CONFIG_COMPAT static int hwdep_compat_ioctl(struct snd_hwdep *hwdep, struct file *file, unsigned int cmd, unsigned long arg) { return hwdep_ioctl(hwdep, file, cmd, (unsigned long)compat_ptr(arg)); } #else #define hwdep_compat_ioctl NULL #endif static const struct snd_hwdep_ops hwdep_ops = { .read = hwdep_read, .release = hwdep_release, .poll = hwdep_poll, .ioctl = hwdep_ioctl, .ioctl_compat = hwdep_compat_ioctl, }; int snd_tscm_create_hwdep_device(struct snd_tscm *tscm) { struct snd_hwdep *hwdep; int err; err = snd_hwdep_new(tscm->card, "Tascam", 0, &hwdep); if (err < 0) return err; strcpy(hwdep->name, "Tascam"); hwdep->iface = SNDRV_HWDEP_IFACE_FW_TASCAM; hwdep->ops = hwdep_ops; hwdep->private_data = tscm; hwdep->exclusive = true; return err; } option value='20'>20space:mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-27 12:54:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-27 12:54:16 -0800
commit1b1bc42c1692e9b62756323c675a44cb1a1f9dbd (patch)
treed514a2d8512fc52c15747841e2368f8f99a50787 /sound/soc/rockchip
parent3365135d43f861003555c963b309672d053a2228 (diff)
parent950eabbd6ddedc1b08350b9169a6a51b130ebaaf (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller: 1) GTP fixes from Andreas Schultz (missing genl module alias, clear IP DF on transmit). 2) Netfilter needs to reflect the fwmark when sending resets, from Pau Espin Pedrol. 3) nftable dump OOPS fix from Liping Zhang. 4) Fix erroneous setting of VIRTIO_NET_HDR_F_DATA_VALID on transmit, from Rolf Neugebauer. 5) Fix build error of ipt_CLUSTERIP when procfs is disabled, from Arnd Bergmann. 6) Fix regression in handling of NETIF_F_SG in harmonize_features(), from Eric Dumazet. 7) Fix RTNL deadlock wrt. lwtunnel module loading, from David Ahern. 8) tcp_fastopen_create_child() needs to setup tp->max_window, from Alexey Kodanev. 9) Missing kmemdup() failure check in ipv6 segment routing code, from Eric Dumazet. 10) Don't execute unix_bind() under the bindlock, otherwise we deadlock with splice. From WANG Cong. 11) ip6_tnl_parse_tlv_enc_lim() potentially reallocates the skb buffer, therefore callers must reload cached header pointers into that skb. Fix from Eric Dumazet. 12) Fix various bugs in legacy IRQ fallback handling in alx driver, from Tobias Regnery. 13) Do not allow lwtunnel drivers to be unloaded while they are referenced by active instances, from Robert Shearman. 14) Fix truncated PHY LED trigger names, from Geert Uytterhoeven. 15) Fix a few regressions from virtio_net XDP support, from John Fastabend and Jakub Kicinski. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (102 commits) ISDN: eicon: silence misleading array-bounds warning net: phy: micrel: add support for KSZ8795 gtp: fix cross netns recv on gtp socket gtp: clear DF bit on GTP packet tx gtp: add genl family modules alias tcp: don't annotate mark on control socket from tcp_v6_send_response() ravb: unmap descriptors when freeing rings virtio_net: reject XDP programs using header adjustment virtio_net: use dev_kfree_skb for small buffer XDP receive r8152: check rx after napi is enabled r8152: re-schedule napi for tx r8152: avoid start_xmit to schedule napi when napi is disabled r8152: avoid start_xmit to call napi_schedule during autosuspend net: dsa: Bring back device detaching in dsa_slave_suspend() net: phy: leds: Fix truncated LED trigger names net: phy: leds: Break dependency of phy.h on phy_led_triggers.h net: phy: leds: Clear phy_num_led_triggers on failure to avoid crash net-next: ethernet: mediatek: change the compatible string Documentation: devicetree: change the mediatek ethernet compatible string bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status(). ...
Diffstat (limited to 'sound/soc/rockchip')