| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * ALSA interface to cx18 PCM capture streams |
| 3 | * |
| 4 | * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | * 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | struct snd_card; |
| 23 | |
| 24 | struct snd_cx18_card { |
| 25 | struct v4l2_device *v4l2_dev; |
| 26 | struct snd_card *sc; |
| 27 | unsigned int capture_transfer_done; |
| 28 | unsigned int hwptr_done_capture; |
| 29 | struct snd_pcm_substream *capture_pcm_substream; |
| 30 | spinlock_t slock; |
| 31 | }; |
| 32 | |
| 33 | extern int cx18_alsa_debug; |
| 34 | |
| 35 | /* |
| 36 | * File operations that manipulate the encoder or video or audio subdevices |
| 37 | * need to be serialized. Use the same lock we use for v4l2 file ops. |
| 38 | */ |
| 39 | static inline void snd_cx18_lock(struct snd_cx18_card *cxsc) |
| 40 | { |
| 41 | struct cx18 *cx = to_cx18(cxsc->v4l2_dev); |
| 42 | mutex_lock(&cx->serialize_lock); |
| 43 | } |
| 44 | |
| 45 | static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc) |
| 46 | { |
| 47 | struct cx18 *cx = to_cx18(cxsc->v4l2_dev); |
| 48 | mutex_unlock(&cx->serialize_lock); |
| 49 | } |
| 50 | |
| 51 | #define CX18_ALSA_DBGFLG_WARN (1 << 0) |
| 52 | #define CX18_ALSA_DBGFLG_INFO (1 << 1) |
| 53 | |
| 54 | #define CX18_ALSA_DEBUG(x, type, fmt, args...) \ |
| 55 | do { \ |
| 56 | if ((x) & cx18_alsa_debug) \ |
| 57 | printk(KERN_INFO "%s-alsa: " type ": " fmt, \ |
| 58 | v4l2_dev->name , ## args); \ |
| 59 | } while (0) |
| 60 | |
| 61 | #define CX18_ALSA_DEBUG_WARN(fmt, args...) \ |
| 62 | CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args) |
| 63 | |
| 64 | #define CX18_ALSA_DEBUG_INFO(fmt, args...) \ |
| 65 | CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args) |
| 66 | |
| 67 | #define CX18_ALSA_ERR(fmt, args...) \ |
| 68 | printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args) |
| 69 | |
| 70 | #define CX18_ALSA_WARN(fmt, args...) \ |
| 71 | printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args) |
| 72 | |
| 73 | #define CX18_ALSA_INFO(fmt, args...) \ |
| 74 | printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args) |