| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jaroslav Kysela | 10839 | 63.34% | 70 | 24.82% |
| Takashi Iwai | 4686 | 27.38% | 59 | 20.92% |
| Linus Torvalds (pre-git) | 1232 | 7.20% | 105 | 37.23% |
| Linus Torvalds | 116 | 0.68% | 10 | 3.55% |
| Clemens Ladisch | 56 | 0.33% | 4 | 1.42% |
| Al Viro | 51 | 0.30% | 4 | 1.42% |
| Roel Kluin | 30 | 0.18% | 2 | 0.71% |
| Jonathan Corbet | 16 | 0.09% | 1 | 0.35% |
| Arnd Bergmann | 15 | 0.09% | 2 | 0.71% |
| Mika Kukkonen | 14 | 0.08% | 1 | 0.35% |
| Ingo Molnar | 11 | 0.06% | 3 | 1.06% |
| Steven Finney | 9 | 0.05% | 1 | 0.35% |
| Takashi Sakamoto | 8 | 0.05% | 2 | 0.71% |
| Dan Carpenter | 4 | 0.02% | 1 | 0.35% |
| Suren Baghdasaryan | 4 | 0.02% | 1 | 0.35% |
| Rusty Russell | 3 | 0.02% | 2 | 0.71% |
| Lars-Peter Clausen | 3 | 0.02% | 1 | 0.35% |
| Christoph Hellwig | 3 | 0.02% | 2 | 0.71% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.35% |
| Gustavo A. R. Silva | 2 | 0.01% | 1 | 0.35% |
| Nicholas Mc Guire | 1 | 0.01% | 1 | 0.35% |
| Bixuan Cui | 1 | 0.01% | 1 | 0.35% |
| Fabian Frederick | 1 | 0.01% | 1 | 0.35% |
| Paulo Marques | 1 | 0.01% | 1 | 0.35% |
| Paul Gortmaker | 1 | 0.01% | 1 | 0.35% |
| Arjan van de Ven | 1 | 0.01% | 1 | 0.35% |
| OGAWA Hirofumi | 1 | 0.01% | 1 | 0.35% |
| Michel Lespinasse | 1 | 0.01% | 1 | 0.35% |
| Joe Perches | 1 | 0.01% | 1 | 0.35% |
| Total | 17113 | 282 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Digital Audio (PCM) abstract layer / OSS compatible * Copyright (c) by Jaroslav Kysela <perex@perex.cz> */ #if 0 #define PLUGIN_DEBUG #endif #if 0 #define OSS_DEBUG #endif #include <linux/init.h> #include <linux/slab.h> #include <linux/sched/signal.h> #include <linux/time.h> #include <linux/vmalloc.h> #include <linux/module.h> #include <linux/math64.h> #include <linux/string.h> #include <linux/compat.h> #include <sound/core.h> #include <sound/minors.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include "pcm_plugin.h" #include <sound/info.h> #include <linux/soundcard.h> #include <sound/initval.h> #include <sound/mixer_oss.h> #define OSS_ALSAEMULVER _SIOR ('M', 249, int) static int dsp_map[SNDRV_CARDS]; static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; static bool nonblock_open = 1; MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); MODULE_LICENSE("GPL"); module_param_array(dsp_map, int, NULL, 0444); MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); module_param_array(adsp_map, int, NULL, 0444); MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); module_param(nonblock_open, bool, 0644); MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); /* * helper functions to process hw_params */ static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) { int changed = 0; if (i->min < min) { i->min = min; i->openmin = openmin; changed = 1; } else if (i->min == min && !i->openmin && openmin) { i->openmin = 1; changed = 1; } if (i->integer) { if (i->openmin) { i->min++; i->openmin = 0; } } if (snd_interval_checkempty(i)) { snd_interval_none(i); return -EINVAL; } return changed; } static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) { int changed = 0; if (i->max > max) { i->max = max; i->openmax = openmax; changed = 1; } else if (i->max == max && !i->openmax && openmax) { i->openmax = 1; changed = 1; } if (i->integer) { if (i->openmax) { i->max--; i->openmax = 0; } } if (snd_interval_checkempty(i)) { snd_interval_none(i); return -EINVAL; } return changed; } static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) { struct snd_interval t; t.empty = 0; t.min = t.max = val; t.openmin = t.openmax = 0; t.integer = 1; return snd_interval_refine(i, &t); } /** * snd_pcm_hw_param_value_min * @params: the hw_params instance * @var: parameter to retrieve * @dir: pointer to the direction (-1,0,1) or NULL * * Return the minimum value for field PAR. */ static unsigned int snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir) { if (hw_is_mask(var)) { if (dir) *dir = 0; return snd_mask_min(hw_param_mask_c(params, var)); } if (hw_is_interval(var)) { const struct snd_interval *i = hw_param_interval_c(params, var); if (dir) *dir = i->openmin; return snd_interval_min(i); } return -EINVAL; } /** * snd_pcm_hw_param_value_max * @params: the hw_params instance * @var: parameter to retrieve * @dir: pointer to the direction (-1,0,1) or NULL * * Return the maximum value for field PAR. */ static int snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir) { if (hw_is_mask(var)) { if (dir) *dir = 0; return snd_mask_max(hw_param_mask_c(params, var)); } if (hw_is_interval(var)) { const struct snd_interval *i = hw_param_interval_c(params, var); if (dir) *dir = - (int) i->openmax; return snd_interval_max(i); } return -EINVAL; } static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, const struct snd_mask *val) { int changed; changed = snd_mask_refine(hw_param_mask(params, var), val); if (changed > 0) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, const struct snd_mask *val) { int changed = _snd_pcm_hw_param_mask(params, var, val); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); if (err < 0) return err; } return 0; } static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int val, int dir) { int changed; int open = 0; if (dir) { if (dir > 0) { open = 1; } else if (dir < 0) { if (val > 0) { open = 1; val--; } } } if (hw_is_mask(var)) changed = snd_mask_refine_min(hw_param_mask(params, var), val + !!open); else if (hw_is_interval(var)) changed = snd_interval_refine_min(hw_param_interval(params, var), val, open); else return -EINVAL; if (changed > 0) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** * snd_pcm_hw_param_min * @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve * @val: minimal value * @dir: pointer to the direction (-1,0,1) or NULL * * Inside configuration space defined by PARAMS remove from PAR all * values < VAL. Reduce configuration space accordingly. * Return new minimum or -EINVAL if the configuration space is empty */ static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int val, int *dir) { int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); if (err < 0) return err; } return snd_pcm_hw_param_value_min(params, var, dir); } static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int val, int dir) { int changed; int open = 0; if (dir) { if (dir < 0) { open = 1; } else if (dir > 0) { open = 1; val++; } } if (hw_is_mask(var)) { if (val == 0 && open) { snd_mask_none(hw_param_mask(params, var)); changed = -EINVAL; } else changed = snd_mask_refine_max(hw_param_mask(params, var), val - !!open); } else if (hw_is_interval(var)) changed = snd_interval_refine_max(hw_param_interval(params, var), val, open); else return -EINVAL; if (changed > 0) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** * snd_pcm_hw_param_max * @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve * @val: maximal value * @dir: pointer to the direction (-1,0,1) or NULL * * Inside configuration space defined by PARAMS remove from PAR all * values >= VAL + 1. Reduce configuration space accordingly. * Return new maximum or -EINVAL if the configuration space is empty */ static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int val, int *dir) { int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); if (err < 0) return err; } return snd_pcm_hw_param_value_max(params, var, dir); } static int boundary_sub(int a, int adir, int b, int bdir, int *c, int *cdir) { adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); *c = a - b; *cdir = adir - bdir; if (*cdir == -2) { (*c)--; } else if (*cdir == 2) { (*c)++; } return 0; } static int boundary_lt(unsigned int a, int adir, unsigned int b, int bdir) { if (adir < 0) { a--; adir = 1; } else if (adir > 0) adir = 1; if (bdir < 0) { b--; bdir = 1; } else if (bdir > 0) bdir = 1; return a < b || (a == b && adir < bdir); } /* Return 1 if min is nearer to best than max */ static int boundary_nearer(int min, int mindir, int best, int bestdir, int max, int maxdir) { int dmin, dmindir; int dmax, dmaxdir; boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); return boundary_lt(dmin, dmindir, dmax, dmaxdir); } /** * snd_pcm_hw_param_near * @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve * @best: value to set * @dir: pointer to the direction (-1,0,1) or NULL * * Inside configuration space defined by PARAMS set PAR to the available value * nearest to VAL. Reduce configuration space accordingly. * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. * Return the value found. */ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int best, int *dir) { struct snd_pcm_hw_params *save __free(kfree) = NULL; int v; unsigned int saved_min; int last = 0; int min, max; int mindir, maxdir; int valdir = dir ? *dir : 0; /* FIXME */ if (best > INT_MAX) best = INT_MAX; min = max = best; mindir = maxdir = valdir; if (maxdir > 0) maxdir = 0; else if (maxdir == 0) maxdir = -1; else { maxdir = 1; max--; } save = kmalloc(sizeof(*save), GFP_KERNEL); if (save == NULL) return -ENOMEM; *save = *params; saved_min = min; min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); if (min >= 0) { struct snd_pcm_hw_params *params1 __free(kfree) = NULL; if (max < 0) goto _end; if ((unsigned int)min == saved_min && mindir == valdir) goto _end; params1 = kmalloc(sizeof(*params1), GFP_KERNEL); if (params1 == NULL) return -ENOMEM; *params1 = *save; max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); if (max < 0) goto _end; if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { *params = *params1; last = 1; } } else { *params = *save; max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); if (max < 0) return max; last = 1; } _end: if (last) v = snd_pcm_hw_param_last(pcm, params, var, dir); else v = snd_pcm_hw_param_first(pcm, params, var, dir); return v; } static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int val, int dir) { int changed; if (hw_is_mask(var)) { struct snd_mask *m = hw_param_mask(params, var); if (val == 0 && dir < 0) { changed = -EINVAL; snd_mask_none(m); } else { if (dir > 0) val++; else if (dir < 0) val--; changed = snd_mask_refine_set(hw_param_mask(params, var), val); } } else if (hw_is_interval(var)) { struct snd_interval *i = hw_param_interval(params, var); if (val == 0 && dir < 0) { changed = -EINVAL; snd_interval_none(i); } else if (dir == 0) changed = snd_interval_refine_set(i, val); else { struct snd_interval t; t.openmin = 1; t.openmax = 1; t.empty = 0; t.integer = 0; if (dir < 0) { t.min = val - 1; t.max = val; } else { t.min = val; t.max = val+1; } changed = snd_interval_refine(i, &t); } } else return -EINVAL; if (changed > 0) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** * snd_pcm_hw_param_set * @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve * @val: value to set * @dir: pointer to the direction (-1,0,1) or NULL * * Inside configuration space defined by PARAMS remove from PAR all * values != VAL. Reduce configuration space accordingly. * Return VAL or -EINVAL if the configuration space is empty */ static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, unsigned int val, int dir) { int changed = _snd_pcm_hw_param_set(params, var, val, dir); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); if (err < 0) return err; } return snd_pcm_hw_param_value(params, var, NULL); } static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { int changed; changed = snd_interval_setinteger(hw_param_interval(params, var)); if (changed > 0) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /* * plugin */ #ifdef CONFIG_SND_PCM_OSS_PLUGINS static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_plugin *plugin, *next; plugin = runtime->oss.plugin_first; while (plugin) { next = plugin->next; snd_pcm_plugin_free(plugin); plugin = next; } runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; return 0; } static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) { struct snd_pcm_runtime *runtime = plugin->plug->runtime; plugin->next = runtime->oss.plugin_first; plugin->prev = NULL; if (runtime->oss.plugin_first) { runtime->oss.plugin_first->prev = plugin; runtime->oss.plugin_first = plugin; } else { runtime->oss.plugin_last = runtime->oss.plugin_first = plugin; } return 0; } int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) { struct snd_pcm_runtime *runtime = plugin->plug->runtime; plugin->next = NULL; plugin->prev = runtime->oss.plugin_last; if (runtime->oss.plugin_last) { runtime->oss.plugin_last->next = plugin; runtime->oss.plugin_last = plugin; } else { runtime->oss.plugin_last = runtime->oss.plugin_first = plugin; } return 0; } #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) { struct snd_pcm_runtime *runtime = substream->runtime; long buffer_size = snd_pcm_lib_buffer_bytes(substream); long bytes = frames_to_bytes(runtime, frames); if (buffer_size == runtime->oss.buffer_bytes) return bytes; #if BITS_PER_LONG >= 64 return runtime->oss.buffer_bytes * bytes / buffer_size; #else { u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; return div_u64(bsize, buffer_size); } #endif } static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) { struct snd_pcm_runtime *runtime = substream->runtime; long buffer_size = snd_pcm_lib_buffer_bytes(substream); if (buffer_size == runtime->oss.buffer_bytes) return bytes_to_frames(runtime, bytes); return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); } static inline snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) { return runtime->hw_ptr_interrupt; } /* define extended formats in the recent OSS versions (if any) */ /* linear formats */ #define AFMT_S32_LE 0x00001000 #define AFMT_S32_BE 0x00002000 #define AFMT_S24_LE 0x00008000 #define AFMT_S24_BE 0x00010000 #define AFMT_S24_PACKED 0x00040000 /* other supported formats */ #define AFMT_FLOAT 0x00004000 #define AFMT_SPDIF_RAW 0x00020000 /* unsupported formats */ #define AFMT_AC3 0x00000400 #define AFMT_VORBIS 0x00000800 static snd_pcm_format_t snd_pcm_oss_format_from(int format) { switch (format) { case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; case AFMT_U8: return SNDRV_PCM_FORMAT_U8; case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; case AFMT_S8: return SNDRV_PCM_FORMAT_S8; case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; default: return SNDRV_PCM_FORMAT_U8; } } static int snd_pcm_oss_format_to(snd_pcm_format_t format) { switch (format) { case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; case SNDRV_PCM_FORMAT_U8: return AFMT_U8; case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; case SNDRV_PCM_FORMAT_S8: return AFMT_S8; case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; default: return -EINVAL; } } static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *oss_params, struct snd_pcm_hw_params *slave_params) { ssize_t s; ssize_t oss_buffer_size; ssize_t oss_period_size, oss_periods; ssize_t min_period_size, max_period_size; struct snd_pcm_runtime *runtime = substream->runtime; size_t oss_frame_size; oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; oss_buffer_size = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL); if (oss_buffer_size <= 0) return -EINVAL; oss_buffer_size = snd_pcm_plug_client_size(substream, oss_buffer_size * oss_frame_size); if (oss_buffer_size <= 0) return -EINVAL; oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); if (atomic_read(&substream->mmap_count)) { if (oss_buffer_size > runtime->oss.mmap_bytes) oss_buffer_size = runtime->oss.mmap_bytes; } if (substream->oss.setup.period_size > 16) oss_period_size = substream->oss.setup.period_size; else if (runtime->oss.fragshift) { oss_period_size = 1 << runtime->oss.fragshift; if (oss_period_size > oss_buffer_size / 2) oss_period_size = oss_buffer_size / 2; } else { int sd; size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; oss_period_size = oss_buffer_size; do { oss_period_size /= 2; } while (oss_period_size > bytes_per_sec); if (runtime->oss.subdivision == 0) { sd = 4; if (oss_period_size / sd > 4096) sd *= 2; if (oss_period_size / sd < 4096) sd = 1; } else sd = runtime->oss.subdivision; oss_period_size /= sd; if (oss_period_size < 16) oss_period_size = 16; } min_period_size = snd_pcm_plug_client_size(substream, snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); if (min_period_size > 0) { min_period_size *= oss_frame_size; min_period_size = roundup_pow_of_two(min_period_size); if (oss_period_size < min_period_size) oss_period_size = min_period_size; } max_period_size = snd_pcm_plug_client_size(substream, snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); if (max_period_size > 0) { max_period_size *= oss_frame_size; max_period_size = rounddown_pow_of_two(max_period_size); if (oss_period_size > max_period_size) oss_period_size = max_period_size; } oss_periods = oss_buffer_size / oss_period_size; if (substream->oss.setup.periods > 1) oss_periods = substream->oss.setup.periods; s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags) s = runtime->oss.maxfrags; if (oss_periods > s) oss_periods = s; s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); if (s < 2) s = 2; if (oss_periods < s) oss_periods = s; while (oss_period_size * oss_periods > oss_buffer_size) oss_period_size /= 2; if (oss_period_size < 16) return -EINVAL; /* don't allocate too large period; 1MB period must be enough */ if (oss_period_size > 1024 * 1024) return -ENOMEM; runtime->oss.period_bytes = oss_period_size; runtime->oss.period_frames = 1; runtime->oss.periods = oss_periods; return 0; } static int choose_rate(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, unsigned int best_rate) { const struct snd_interval *it; struct snd_pcm_hw_params *save __free(kfree) = NULL; unsigned int rate, prev; save = kmalloc(sizeof(*save), GFP_KERNEL); if (save == NULL) return -ENOMEM; *save = *params; it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); /* try multiples of the best rate */ rate = best_rate; for (;;) { if (it->max < rate || (it->max == rate && it->openmax)) break; if (it->min < rate || (it->min == rate && !it->openmin)) { int ret; ret = snd_pcm_hw_param_set(substream, params, SNDRV_PCM_HW_PARAM_RATE, rate, 0); if (ret == (int)rate) return rate; *params = *save; } prev = rate; rate += best_rate; if (rate <= prev) break; } /* not found, use the nearest rate */ return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); } /* parameter locking: returns immediately if tried during streaming */ static int lock_params(struct snd_pcm_runtime *runtime) { if (mutex_lock_interruptible(&runtime->oss.params_lock)) return -ERESTARTSYS; if (atomic_read(&runtime->oss.rw_ref)) { mutex_unlock(&runtime->oss.params_lock); return -EBUSY; } return 0; } static void unlock_params(struct snd_pcm_runtime *runtime) { mutex_unlock(&runtime->oss.params_lock); } static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; kvfree(runtime->oss.buffer); runtime->oss.buffer = NULL; #ifdef CONFIG_SND_PCM_OSS_PLUGINS snd_pcm_oss_plugin_clear(substream); #endif } /* call with params_lock held */ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_hw_params *params, *sparams; struct snd_pcm_sw_params *sw_params; ssize_t oss_buffer_size, oss_period_size; size_t oss_frame_size; int err; int direct; snd_pcm_format_t format, sformat; int n; const struct snd_mask *sformat_mask; struct snd_mask mask; if (!runtime->oss.params) return 0; sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); params = kmalloc(sizeof(*params), GFP_KERNEL); sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); if (!sw_params || !params || !sparams) { err = -ENOMEM; goto failure; } if (atomic_read(&substream->mmap_count)) direct = 1; else direct = substream->oss.setup.direct; _snd_pcm_hw_params_any(sparams); _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); snd_mask_none(&mask); if (atomic_read(&substream->mmap_count)) snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); else { snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); if (!direct) snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); } err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); if (err < 0) { pcm_dbg(substream->pcm, "No usable accesses\n"); err = -EINVAL; goto failure; } err = choose_rate(substream, sparams, runtime->oss.rate); if (err < 0) goto failure; err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); if (err < 0) goto failure; format = snd_pcm_oss_format_from(runtime->oss.format); sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); if (direct) sformat = format; else sformat = snd_pcm_plug_slave_format(format, sformat_mask); if ((__force int)sformat < 0 || !snd_mask_test_format(sformat_mask, sformat)) { pcm_for_each_format(sformat) { if (snd_mask_test_format(sformat_mask, sformat) && snd_pcm_oss_format_to(sformat) >= 0) goto format_found; } pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); err = -EINVAL; goto failure; } format_found: err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); if (err < 0) goto failure; if (direct) { memcpy(params, sparams, sizeof(*params)); } else { _snd_pcm_hw_params_any(params); _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, 0); _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, runtime->oss.rate, 0); pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", params_access(params), params_format(params), params_channels(params), params_rate(params)); } pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", params_access(sparams), params_format(sparams), params_channels(sparams), params_rate(sparams)); oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * params_channels(params) / 8; err = snd_pcm_oss_period_size(substream, params, sparams); if (err < 0) goto failure; n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); if (err < 0) goto failure; err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, runtime->oss.periods, NULL); if (err < 0) goto failure; snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); if (err < 0) { pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); goto failure; } #ifdef CONFIG_SND_PCM_OSS_PLUGINS snd_pcm_oss_plugin_clear(substream); if (!direct) { /* add necessary plugins */ err = snd_pcm_plug_format_plugins(substream, params, sparams); if (err < 0) { pcm_dbg(substream->pcm, "snd_pcm_plug_format_plugins failed: %i\n", err); goto failure; } if (runtime->oss.plugin_first) { struct snd_pcm_plugin *plugin; err = snd_pcm_plugin_build_io(substream, sparams, &plugin); if (err < 0) { pcm_dbg(substream->pcm, "snd_pcm_plugin_build_io failed: %i\n", err); goto failure; } if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { err = snd_pcm_plugin_append(plugin); } else { err = snd_pcm_plugin_insert(plugin); } if (err < 0) goto failure; } } #endif if (runtime->oss.trigger) { sw_params->start_threshold = 1; } else { sw_params->start_threshold = runtime->boundary; } if (atomic_read(&substream->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE) sw_params->stop_threshold = runtime->boundary; else sw_params->stop_threshold = runtime->buffer_size; sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; sw_params->period_step = 1; sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : runtime->period_size; if (atomic_read(&substream->mmap_count) || substream->oss.setup.nosilence) { sw_params->silence_threshold = 0; sw_params->silence_size = 0; } else { snd_pcm_uframes_t frames; frames = runtime->period_size + 16; if (frames > runtime->buffer_size) frames = runtime->buffer_size; sw_params->silence_threshold = frames; sw_params->silence_size = frames; } err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params); if (err < 0) { pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); goto failure; } runtime->oss.periods = params_periods(sparams); oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); if (oss_period_size < 0) { err = -EINVAL; goto failure; } #ifdef CONFIG_SND_PCM_OSS_PLUGINS if (runtime->oss.plugin_first) { err = snd_pcm_plug_alloc(substream, oss_period_size); if (err < 0) goto failure; } #endif oss_period_size = array_size(oss_period_size, oss_frame_size); oss_buffer_size = array_size(oss_period_size, runtime->oss.periods); if (oss_buffer_size <= 0) { err = -EINVAL; goto failure; } runtime->oss.period_bytes = oss_period_size; runtime->oss.buffer_bytes = oss_buffer_size; pdprintf("oss: period bytes = %i, buffer bytes = %i\n", runtime->oss.period_bytes, runtime->oss.buffer_bytes); pdprintf("slave: period_size = %i, buffer_size = %i\n", params_period_size(sparams), params_buffer_size(sparams)); runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); runtime->oss.channels = params_channels(params); runtime->oss.rate = params_rate(params); kvfree(runtime->oss.buffer); runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); if (!runtime->oss.buffer) { err = -ENOMEM; goto failure; } runtime->oss.params = 0; runtime->oss.prepare = 1; runtime->oss.buffer_used = 0; if (runtime->dma_area) snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); err = 0; failure: if (err) snd_pcm_oss_release_buffers(substream); kfree(sw_params); kfree(params); kfree(sparams); return err; } /* this one takes the lock by itself */ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, bool trylock) { struct snd_pcm_runtime *runtime = substream->runtime; int err; if (trylock) { if (!(mutex_trylock(&runtime->oss.params_lock))) return -EAGAIN; } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) return -ERESTARTSYS; err = snd_pcm_oss_change_params_locked(substream); mutex_unlock(&runtime->oss.params_lock); return err; } static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) { int idx, err; struct snd_pcm_substream *asubstream = NULL, *substream; for (idx = 0; idx < 2; idx++) { substream = pcm_oss_file->streams[idx]; if (substream == NULL) continue; if (asubstream == NULL) asubstream = substream; if (substream->runtime->oss.params) { err = snd_pcm_oss_change_params(substream, false); if (err < 0) return err; } } if (!asubstream) return -EIO; if (r_substream) *r_substream = asubstream; return 0; } /* call with params_lock held */ /* NOTE: this always call PREPARE unconditionally no matter whether * runtime->oss.prepare is set or not */ static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) { int err; struct snd_pcm_runtime *runtime = substream->runtime; err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); if (err < 0) { pcm_dbg(substream->pcm, "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); return err; } runtime->oss.prepare = 0; runtime->oss.prev_hw_ptr_period = 0; runtime->oss.period_ptr = 0; runtime->oss.buffer_used = 0; return 0; } static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime; int err; runtime = substream->runtime; if (runtime->oss.params) { err = snd_pcm_oss_change_params(substream, false); if (err < 0) return err; } if (runtime->oss.prepare) { if (mutex_lock_interruptible(&runtime->oss.params_lock)) return -ERESTARTSYS; err = snd_pcm_oss_prepare(substream); mutex_unlock(&runtime->oss.params_lock); if (err < 0) return err; } return 0; } /* call with params_lock held */ static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime; int err; runtime = substream->runtime; if (runtime->oss.params) { err = snd_pcm_oss_change_params_locked(substream); if (err < 0) return err; } if (runtime->oss.prepare) { err = snd_pcm_oss_prepare(substream); if (err < 0) return err; } return 0; } static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) { struct snd_pcm_runtime *runtime; snd_pcm_uframes_t frames; int err = 0; while (1) { err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); if (err < 0) break; runtime = substream->runtime; if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) break; /* in case of overrun, skip whole periods like OSS/Linux driver does */ /* until avail(delay) <= buffer_size */ frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; frames /= runtime->period_size; frames *= runtime->period_size; err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); if (err < 0) break; } return err; } snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) { struct snd_pcm_runtime *runtime = substream->runtime; int ret; while (1) { if (runtime->state == SNDRV_PCM_STATE_XRUN || runtime->state == SNDRV_PCM_STATE_SUSPENDED) { #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "pcm_oss: write: recovering from %s\n", runtime->state == SNDRV_PCM_STATE_XRUN ? "XRUN" : "SUSPEND"); #endif ret = snd_pcm_oss_prepare(substream); if (ret < 0) break; } mutex_unlock(&runtime->oss.params_lock); ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, frames, in_kernel); mutex_lock(&runtime->oss.params_lock); if (ret != -EPIPE && ret != -ESTRPIPE) break; /* test, if we can't store new data, because the stream */ /* has not been started */ if (runtime->state == SNDRV_PCM_STATE_PREPARED) return -EAGAIN; } return ret; } snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) { struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_sframes_t delay; int ret; while (1) { if (runtime->state == SNDRV_PCM_STATE_XRUN || runtime->state == SNDRV_PCM_STATE_SUSPENDED) { #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "pcm_oss: read: recovering from %s\n", runtime->state == SNDRV_PCM_STATE_XRUN ? "XRUN" : "SUSPEND"); #endif ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); if (ret < 0) break; } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { ret = snd_pcm_oss_prepare(substream); if (ret < 0) break; } ret = snd_pcm_oss_capture_position_fixup(substream, &delay); if (ret < 0) break; mutex_unlock(&runtime->oss.params_lock); ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, frames, in_kernel); mutex_lock(&runtime->oss.params_lock); if (ret == -EPIPE) { if (runtime->state == SNDRV_PCM_STATE_DRAINING) { ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); if (ret < 0) break; } continue; } if (ret != -ESTRPIPE) break; } return ret; } #ifdef CONFIG_SND_PCM_OSS_PLUGINS snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) { struct snd_pcm_runtime *runtime = substream->runtime; int ret; while (1) { if (runtime->state == SNDRV_PCM_STATE_XRUN || runtime->state == SNDRV_PCM_STATE_SUSPENDED) { #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "pcm_oss: writev: recovering from %s\n", runtime->state == SNDRV_PCM_STATE_XRUN ? "XRUN" : "SUSPEND"); #endif ret = snd_pcm_oss_prepare(substream); if (ret < 0) break; } ret = snd_pcm_kernel_writev(substream, bufs, frames); if (ret != -EPIPE && ret != -ESTRPIPE) break; /* test, if we can't store new data, because the stream */ /* has not been started */ if (runtime->state == SNDRV_PCM_STATE_PREPARED) return -EAGAIN; } return ret; } snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) { struct snd_pcm_runtime *runtime = substream->runtime; int ret; while (1) { if (runtime->state == SNDRV_PCM_STATE_XRUN || runtime->state == SNDRV_PCM_STATE_SUSPENDED) { #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "pcm_oss: readv: recovering from %s\n", runtime->state == SNDRV_PCM_STATE_XRUN ? "XRUN" : "SUSPEND"); #endif ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); if (ret < 0) break; } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { ret = snd_pcm_oss_prepare(substream); if (ret < 0) break; } ret = snd_pcm_kernel_readv(substream, bufs, frames); if (ret != -EPIPE && ret != -ESTRPIPE) break; } return ret; } #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) { struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_sframes_t frames, frames1; #ifdef CONFIG_SND_PCM_OSS_PLUGINS if (runtime->oss.plugin_first) { struct snd_pcm_plugin_channel *channels; size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; if (!in_kernel) { if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) return -EFAULT; buf = runtime->oss.buffer; } frames = bytes / oss_frame_bytes; frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); if (frames1 < 0) return frames1; frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); if (frames1 <= 0) return frames1; bytes = frames1 * oss_frame_bytes; } else #endif { frames = bytes_to_frames(runtime, bytes); frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); if (frames1 <= 0) return frames1; bytes = frames_to_bytes(runtime, frames1); } return bytes; } static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) { size_t xfer = 0; ssize_t tmp = 0; struct snd_pcm_runtime *runtime = substream->runtime; if (atomic_read(&substream->mmap_count)) return -ENXIO; atomic_inc(&runtime->oss.rw_ref); while (bytes > 0) { if (mutex_lock_interruptible(&runtime->oss.params_lock)) { tmp = -ERESTARTSYS; break; } tmp = snd_pcm_oss_make_ready_locked(substream); if (tmp < 0) goto err; if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { tmp = bytes; if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; if (tmp > 0) { if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { tmp = -EFAULT; goto err; } } runtime->oss.buffer_used += tmp; buf += tmp; bytes -= tmp; xfer += tmp; if (substream->oss.setup.partialfrag || runtime->oss.buffer_used == runtime->oss.period_bytes) { tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, runtime->oss.buffer_used - runtime->oss.period_ptr, 1); if (tmp <= 0) goto err; runtime->oss.bytes += tmp; runtime->oss.period_ptr += tmp; runtime->oss.period_ptr %= runtime->oss.period_bytes; if (runtime->oss.period_ptr == 0 || runtime->oss.period_ptr == runtime->oss.buffer_used) runtime->oss.buffer_used = 0; else if ((substream->f_flags & O_NONBLOCK) != 0) { tmp = -EAGAIN; goto err; } } } else { tmp = snd_pcm_oss_write2(substream, (const char __force *)buf, runtime->oss.period_bytes, 0); if (tmp <= 0) goto err; runtime->oss.bytes += tmp; buf += tmp; bytes -= tmp; xfer += tmp; if ((substream->f_flags & O_NONBLOCK) != 0 && tmp != runtime->oss.period_bytes) tmp = -EAGAIN; } err: mutex_unlock(&runtime->oss.params_lock); if (tmp < 0) break; if (signal_pending(current)) { tmp = -ERESTARTSYS; break; } tmp = 0; } atomic_dec(&runtime->oss.rw_ref); return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; } static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) { struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_sframes_t frames, frames1; #ifdef CONFIG_SND_PCM_OSS_PLUGINS char __user *final_dst = (char __force __user *)buf; if (runtime->oss.plugin_first) { struct snd_pcm_plugin_channel *channels; size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; if (!in_kernel) buf = runtime->oss.buffer; frames = bytes / oss_frame_bytes; frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); if (frames1 < 0) return frames1; frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); if (frames1 <= 0) return frames1; bytes = frames1 * oss_frame_bytes; if (!in_kernel && copy_to_user(final_dst, buf, bytes)) return -EFAULT; } else #endif { frames = bytes_to_frames(runtime, bytes); frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); if (frames1 <= 0) return frames1; bytes = frames_to_bytes(runtime, frames1); } return bytes; } static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) { size_t xfer = 0; ssize_t tmp = 0; struct snd_pcm_runtime *runtime = substream->runtime; if (atomic_read(&substream->mmap_count)) return -ENXIO; atomic_inc(&runtime->oss.rw_ref); while (bytes > 0) { if (mutex_lock_interruptible(&runtime->oss.params_lock)) { tmp = -ERESTARTSYS; break; } tmp = snd_pcm_oss_make_ready_locked(substream); if (tmp < 0) goto err; if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { if (runtime->oss.buffer_used == 0) { tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); if (tmp <= 0) goto err; runtime->oss.bytes += tmp; runtime->oss.period_ptr = tmp; runtime->oss.buffer_used = tmp; } tmp = bytes; if ((size_t) tmp > runtime->oss.buffer_used) tmp = runtime->oss.buffer_used; if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { tmp = -EFAULT; goto err; } buf += tmp; bytes -= tmp; xfer += tmp; runtime->oss.buffer_used -= tmp; } else { tmp = snd_pcm_oss_read2(substream, (char __force *)buf, runtime->oss.period_bytes, 0); if (tmp <= 0) goto err; runtime->oss.bytes += tmp; buf += tmp; bytes -= tmp; xfer += tmp; } err: mutex_unlock(&runtime->oss.params_lock); if (tmp < 0) break; if (signal_pending(current)) { tmp = -ERESTARTSYS; break; } tmp = 0; } atomic_dec(&runtime->oss.rw_ref); return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; } static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; int i; for (i = 0; i < 2; i++) { substream = pcm_oss_file->streams[i]; if (!substream) continue; runtime = substream->runtime; snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); mutex_lock(&runtime->oss.params_lock); runtime->oss.prepare = 1; runtime->oss.buffer_used = 0; runtime->oss.prev_hw_ptr_period = 0; runtime->oss.period_ptr = 0; mutex_unlock(&runtime->oss.params_lock); } return 0; } static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; int err; substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream != NULL) { err = snd_pcm_oss_make_ready(substream); if (err < 0) return err; snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); } /* note: all errors from the start action are ignored */ /* OSS apps do not know, how to handle them */ return 0; } static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) { struct snd_pcm_runtime *runtime; ssize_t result = 0; snd_pcm_state_t state; long res; wait_queue_entry_t wait; runtime = substream->runtime; init_waitqueue_entry(&wait, current); add_wait_queue(&runtime->sleep, &wait); #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "sync1: size = %li\n", size); #endif while (1) { result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); if (result > 0) { runtime->oss.buffer_used = 0; result = 0; break; } if (result != 0 && result != -EAGAIN) break; result = 0; set_current_state(TASK_INTERRUPTIBLE); scoped_guard(pcm_stream_lock_irq, substream) state = runtime->state; if (state != SNDRV_PCM_STATE_RUNNING) { set_current_state(TASK_RUNNING); break; } res = schedule_timeout(10 * HZ); if (signal_pending(current)) { result = -ERESTARTSYS; break; } if (res == 0) { pcm_err(substream->pcm, "OSS sync error - DMA timeout\n"); result = -EIO; break; } } remove_wait_queue(&runtime->sleep, &wait); return result; } static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) { int err = 0; unsigned int saved_f_flags; struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; snd_pcm_format_t format; unsigned long width; size_t size; substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream != NULL) { runtime = substream->runtime; if (atomic_read(&substream->mmap_count)) goto __direct; atomic_inc(&runtime->oss.rw_ref); if (mutex_lock_interruptible(&runtime->oss.params_lock)) { atomic_dec(&runtime->oss.rw_ref); return -ERESTARTSYS; } err = snd_pcm_oss_make_ready_locked(substream); if (err < 0) goto unlock; format = snd_pcm_oss_format_from(runtime->oss.format); width = snd_pcm_format_physical_width(format); if (runtime->oss.buffer_used > 0) { #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "sync: buffer_used\n"); #endif size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; snd_pcm_format_set_silence(format, runtime->oss.buffer + runtime->oss.buffer_used, size); err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); if (err < 0) goto unlock; } else if (runtime->oss.period_ptr > 0) { #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "sync: period_ptr\n"); #endif size = runtime->oss.period_bytes - runtime->oss.period_ptr; snd_pcm_format_set_silence(format, runtime->oss.buffer, size * 8 / width); err = snd_pcm_oss_sync1(substream, size); if (err < 0) goto unlock; } /* * The ALSA's period might be a bit large than OSS one. * Fill the remain portion of ALSA period with zeros. */ size = runtime->control->appl_ptr % runtime->period_size; if (size > 0) { size = runtime->period_size - size; if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) snd_pcm_lib_write(substream, NULL, size); else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) snd_pcm_lib_writev(substream, NULL, size); } unlock: mutex_unlock(&runtime->oss.params_lock); atomic_dec(&runtime->oss.rw_ref); if (err < 0) return err; /* * finish sync: drain the buffer */ __direct: saved_f_flags = substream->f_flags; substream->f_flags &= ~O_NONBLOCK; err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); substream->f_flags = saved_f_flags; if (err < 0) return err; mutex_lock(&runtime->oss.params_lock); runtime->oss.prepare = 1; mutex_unlock(&runtime->oss.params_lock); } substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; if (substream != NULL) { err = snd_pcm_oss_make_ready(substream); if (err < 0) return err; runtime = substream->runtime; err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); if (err < 0) return err; mutex_lock(&runtime->oss.params_lock); runtime->oss.buffer_used = 0; runtime->oss.prepare = 1; mutex_unlock(&runtime->oss.params_lock); } return 0; } static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) { int idx; for (idx = 1; idx >= 0; --idx) { struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; struct snd_pcm_runtime *runtime; int err; if (substream == NULL) continue; runtime = substream->runtime; if (rate < 1000) rate = 1000; else if (rate > 192000) rate = 192000; err = lock_params(runtime); if (err < 0) return err; if (runtime->oss.rate != rate) { runtime->oss.params = 1; runtime->oss.rate = rate; } unlock_params(runtime); } return snd_pcm_oss_get_rate(pcm_oss_file); } static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; int err; err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); if (err < 0) return err; return substream->runtime->oss.rate; } static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) { int idx; if (channels < 1) channels = 1; if (channels > 128) return -EINVAL; for (idx = 1; idx >= 0; --idx) { struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; struct snd_pcm_runtime *runtime; int err; if (substream == NULL) continue; runtime = substream->runtime; err = lock_params(runtime); if (err < 0) return err; if (runtime->oss.channels != channels) { runtime->oss.params = 1; runtime->oss.channels = channels; } unlock_params(runtime); } return snd_pcm_oss_get_channels(pcm_oss_file); } static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; int err; err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); if (err < 0) return err; return substream->runtime->oss.channels; } static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; int err; err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); if (err < 0) return err; return substream->runtime->oss.period_bytes; } static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; int err; int direct; struct snd_pcm_hw_params *params __free(kfree) = NULL; unsigned int formats = 0; const struct snd_mask *format_mask; int fmt; err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); if (err < 0) return err; if (atomic_read(&substream->mmap_count)) direct = 1; else direct = substream->oss.setup.direct; if (!direct) return AFMT_MU_LAW | AFMT_U8 | AFMT_S16_LE | AFMT_S16_BE | AFMT_S8 | AFMT_U16_LE | AFMT_U16_BE | AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | AFMT_S24_PACKED; params = kmalloc(sizeof(*params), GFP_KERNEL); if (!params) return -ENOMEM; _snd_pcm_hw_params_any(params); err = snd_pcm_hw_refine(substream, params); if (err < 0) return err; format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); for (fmt = 0; fmt < 32; ++fmt) { if (snd_mask_test(format_mask, fmt)) { int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); if (f >= 0) formats |= f; } } return formats; } static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) { int formats, idx; int err; if (format != AFMT_QUERY) { formats = snd_pcm_oss_get_formats(pcm_oss_file); if (formats < 0) return formats; if (!(formats & format)) format = AFMT_U8; for (idx = 1; idx >= 0; --idx) { struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; struct snd_pcm_runtime *runtime; if (substream == NULL) continue; runtime = substream->runtime; err = lock_params(runtime); if (err < 0) return err; if (runtime->oss.format != format) { runtime->oss.params = 1; runtime->oss.format = format; } unlock_params(runtime); } } return snd_pcm_oss_get_format(pcm_oss_file); } static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; int err; err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); if (err < 0) return err; return substream->runtime->oss.format; } static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) { struct snd_pcm_runtime *runtime; runtime = substream->runtime; if (subdivide == 0) { subdivide = runtime->oss.subdivision; if (subdivide == 0) subdivide = 1; return subdivide; } if (runtime->oss.subdivision || runtime->oss.fragshift) return -EINVAL; if (subdivide != 1 && subdivide != 2 && subdivide != 4 && subdivide != 8 && subdivide != 16) return -EINVAL; runtime->oss.subdivision = subdivide; runtime->oss.params = 1; return subdivide; } static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) { int err = -EINVAL, idx; for (idx = 1; idx >= 0; --idx) { struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; struct snd_pcm_runtime *runtime; if (substream == NULL) continue; runtime = substream->runtime; err = lock_params(runtime); if (err < 0) return err; err = snd_pcm_oss_set_subdivide1(substream, subdivide); unlock_params(runtime); if (err < 0) return err; } return err; } static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) { struct snd_pcm_runtime *runtime; int fragshift; runtime = substream->runtime; if (runtime->oss.subdivision || runtime->oss.fragshift) return -EINVAL; fragshift = val & 0xffff; if (fragshift >= 25) /* should be large enough */ return -EINVAL; runtime->oss.fragshift = fragshift; runtime->oss.maxfrags = (val >> 16) & 0xffff; if (runtime->oss.fragshift < 4) /* < 16 */ runtime->oss.fragshift = 4; if (runtime->oss.maxfrags < 2) runtime->oss.maxfrags = 2; runtime->oss.params = 1; return 0; } static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) { int err = -EINVAL, idx; for (idx = 1; idx >= 0; --idx) { struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; struct snd_pcm_runtime *runtime; if (substream == NULL) continue; runtime = substream->runtime; err = lock_params(runtime); if (err < 0) return err; err = snd_pcm_oss_set_fragment1(substream, val); unlock_params(runtime); if (err < 0) return err; } return err; } static int snd_pcm_oss_nonblock(struct file * file) { spin_lock(&file->f_lock); file->f_flags |= O_NONBLOCK; spin_unlock(&file->f_lock); return 0; } static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) { if (substream == NULL) { res &= ~DSP_CAP_DUPLEX; return res; } #ifdef DSP_CAP_MULTI if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) if (substream->pstr->substream_count > 1) res |= DSP_CAP_MULTI; #endif /* DSP_CAP_REALTIME is set all times: */ /* all ALSA drivers can return actual pointer in ring buffer */ #if defined(DSP_CAP_REALTIME) && 0 { struct snd_pcm_runtime *runtime = substream->runtime; if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) res &= ~DSP_CAP_REALTIME; } #endif return res; } static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) { int result, idx; result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; for (idx = 0; idx < 2; idx++) { struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; result = snd_pcm_oss_get_caps1(substream, result); } result |= 0x0001; /* revision - same as SB AWE 64 */ return result; } static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) { struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t appl_ptr; appl_ptr = hw_ptr + runtime->buffer_size; appl_ptr %= runtime->boundary; runtime->control->appl_ptr = appl_ptr; } static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) { struct snd_pcm_runtime *runtime; struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; int err, cmd; #ifdef OSS_DEBUG pr_debug("pcm_oss: trigger = 0x%x\n", trigger); #endif psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; if (psubstream) { err = snd_pcm_oss_make_ready(psubstream); if (err < 0) return err; } if (csubstream) { err = snd_pcm_oss_make_ready(csubstream); if (err < 0) return err; } if (psubstream) { runtime = psubstream->runtime; cmd = 0; if (mutex_lock_interruptible(&runtime->oss.params_lock)) return -ERESTARTSYS; if (trigger & PCM_ENABLE_OUTPUT) { if (runtime->oss.trigger) goto _skip1; if (atomic_read(&psubstream->mmap_count)) snd_pcm_oss_simulate_fill(psubstream, get_hw_ptr_period(runtime)); runtime->oss.trigger = 1; runtime->start_threshold = 1; cmd = SNDRV_PCM_IOCTL_START; } else { if (!runtime->oss.trigger) goto _skip1; runtime->oss.trigger = 0; runtime->start_threshold = runtime->boundary; cmd = SNDRV_PCM_IOCTL_DROP; runtime->oss.prepare = 1; } _skip1: mutex_unlock(&runtime->oss.params_lock); if (cmd) { err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); if (err < 0) return err; } } if (csubstream) { runtime = csubstream->runtime; cmd = 0; if (mutex_lock_interruptible(&runtime->oss.params_lock)) return -ERESTARTSYS; if (trigger & PCM_ENABLE_INPUT) { if (runtime->oss.trigger) goto _skip2; runtime->oss.trigger = 1; runtime->start_threshold = 1; cmd = SNDRV_PCM_IOCTL_START; } else { if (!runtime->oss.trigger) goto _skip2; runtime->oss.trigger = 0; runtime->start_threshold = runtime->boundary; cmd = SNDRV_PCM_IOCTL_DROP; runtime->oss.prepare = 1; } _skip2: mutex_unlock(&runtime->oss.params_lock); if (cmd) { err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); if (err < 0) return err; } } return 0; } static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; int result = 0; psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) result |= PCM_ENABLE_OUTPUT; if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) result |= PCM_ENABLE_INPUT; return result; } static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; snd_pcm_sframes_t delay; int err; substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream == NULL) return -EINVAL; err = snd_pcm_oss_make_ready(substream); if (err < 0) return err; runtime = substream->runtime; if (runtime->oss.params || runtime->oss.prepare) return 0; err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); if (err == -EPIPE) delay = 0; /* hack for broken OSS applications */ else if (err < 0) return err; return snd_pcm_oss_bytes(substream, delay); } static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) { struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; snd_pcm_sframes_t delay; int fixup; struct count_info info; int err; if (_info == NULL) return -EFAULT; substream = pcm_oss_file->streams[stream]; if (substream == NULL) return -EINVAL; err = snd_pcm_oss_make_ready(substream); if (err < 0) return err; runtime = substream->runtime; if (runtime->oss.params || runtime->oss.prepare) { memset(&info, 0, sizeof(info)); if (copy_to_user(_info, &info, sizeof(info))) return -EFAULT; return 0; } if (stream == SNDRV_PCM_STREAM_PLAYBACK) { err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { err = 0; delay = 0; fixup = 0; } else { fixup = runtime->oss.buffer_used; } } else { err = snd_pcm_oss_capture_position_fixup(substream, &delay); fixup = -runtime->oss.buffer_used; } if (err < 0) return err; info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); if (atomic_read(&substream->mmap_count)) { snd_pcm_sframes_t n; delay = get_hw_ptr_period(runtime); n = delay - runtime->oss.prev_hw_ptr_period; if (n < 0) n += runtime->boundary; info.blocks = n / runtime->period_size; runtime->oss.prev_hw_ptr_period = delay; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) snd_pcm_oss_simulate_fill(substream, delay); info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; } else { delay = snd_pcm_oss_bytes(substream, delay); if (stream == SNDRV_PCM_STREAM_PLAYBACK) { if (substream->oss.setup.buggyptr) info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; else info.blocks = (delay + fixup) / runtime->oss.period_bytes; info.bytes = (runtime->oss.bytes - delay) & INT_MAX; } else { delay += fixup; info.blocks = delay / runtime->oss.period_bytes; info.bytes = (runtime->oss.bytes + delay) & INT_MAX; } } if (copy_to_user(_info, &info, sizeof(info))) return -EFAULT; return 0; } static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) { struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; snd_pcm_sframes_t avail; int fixup; struct audio_buf_info info; int err; if (_info == NULL) return -EFAULT; substream = pcm_oss_file->streams[stream]; if (substream == NULL) return -EINVAL; runtime = substream->runtime; if (runtime->oss.params) { err = snd_pcm_oss_change_params(substream, false); if (err < 0) return err; } info.fragsize = runtime->oss.period_bytes; info.fragstotal = runtime->periods; if (runtime->oss.prepare) { if (stream == SNDRV_PCM_STREAM_PLAYBACK) { info.bytes = runtime->oss.period_bytes * runtime->oss.periods; info.fragments = runtime->oss.periods; } else { info.bytes = 0; info.fragments = 0; } } else { if (stream == SNDRV_PCM_STREAM_PLAYBACK) { err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { avail = runtime->buffer_size; err = 0; fixup = 0; } else { avail = runtime->buffer_size - avail; fixup = -runtime->oss.buffer_used; } } else { err = snd_pcm_oss_capture_position_fixup(substream, &avail); fixup = runtime->oss.buffer_used; } if (err < 0) return err; info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; info.fragments = info.bytes / runtime->oss.period_bytes; } #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); #endif if (copy_to_user(_info, &info, sizeof(info))) return -EFAULT; return 0; } static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) { // it won't be probably implemented // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); return -EINVAL; } static const char *strip_task_path(const char *path) { const char *ptr, *ptrl = NULL; for (ptr = path; *ptr; ptr++) { if (*ptr == '/') ptrl = ptr + 1; } return ptrl; } static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, const char *task_name, struct snd_pcm_oss_setup *rsetup) { struct snd_pcm_oss_setup *setup; guard(mutex)(&pcm->streams[stream].oss.setup_mutex); do { for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { if (!strcmp(setup->task_name, task_name)) goto out; } } while ((task_name = strip_task_path(task_name)) != NULL); out: if (setup) *rsetup = *setup; } static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) { snd_pcm_oss_release_buffers(substream); substream->oss.oss = 0; } static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, struct snd_pcm_oss_setup *setup, int minor) { struct snd_pcm_runtime *runtime; substream->oss.oss = 1; substream->oss.setup = *setup; if (setup->nonblock) substream->f_flags |= O_NONBLOCK; else if (setup->block) substream->f_flags &= ~O_NONBLOCK; runtime = substream->runtime; runtime->oss.params = 1; runtime->oss.trigger = 1; runtime->oss.rate = 8000; mutex_init(&runtime->oss.params_lock); switch (SNDRV_MINOR_OSS_DEVICE(minor)) { case SNDRV_MINOR_OSS_PCM_8: runtime->oss.format = AFMT_U8; break; case SNDRV_MINOR_OSS_PCM_16: runtime->oss.format = AFMT_S16_LE; break; default: runtime->oss.format = AFMT_MU_LAW; } runtime->oss.channels = 1; runtime->oss.fragshift = 0; runtime->oss.maxfrags = 0; runtime->oss.subdivision = 0; substream->pcm_release = snd_pcm_oss_release_substream; atomic_set(&runtime->oss.rw_ref, 0); } static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) { int cidx; if (!pcm_oss_file) return 0; for (cidx = 0; cidx < 2; ++cidx) { struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; if (substream) snd_pcm_release_substream(substream); } kfree(pcm_oss_file); return 0; } static int snd_pcm_oss_open_file(struct file *file, struct snd_pcm *pcm, struct snd_pcm_oss_file **rpcm_oss_file, int minor, struct snd_pcm_oss_setup *setup) { int idx, err; struct snd_pcm_oss_file *pcm_oss_file; struct snd_pcm_substream *substream; fmode_t f_mode = file->f_mode; if (rpcm_oss_file) *rpcm_oss_file = NULL; pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); if (pcm_oss_file == NULL) return -ENOMEM; if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) f_mode = FMODE_WRITE; file->f_flags &= ~O_APPEND; for (idx = 0; idx < 2; idx++) { if (setup[idx].disable) continue; if (! pcm->streams[idx].substream_count) continue; /* no matching substream */ if (idx == SNDRV_PCM_STREAM_PLAYBACK) { if (! (f_mode & FMODE_WRITE)) continue; } else { if (! (f_mode & FMODE_READ)) continue; } err = snd_pcm_open_substream(pcm, idx, file, &substream); if (err < 0) { snd_pcm_oss_release_file(pcm_oss_file); return err; } pcm_oss_file->streams[idx] = substream; snd_pcm_oss_init_substream(substream, &setup[idx], minor); } if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { snd_pcm_oss_release_file(pcm_oss_file); return -EINVAL; } file->private_data = pcm_oss_file; if (rpcm_oss_file) *rpcm_oss_file = pcm_oss_file; return 0; } static int snd_task_name(struct task_struct *task, char *name, size_t size) { unsigned int idx; if (snd_BUG_ON(!task || !name || size < 2)) return -EINVAL; for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) name[idx] = task->comm[idx]; name[idx] = '\0'; return 0; } static int snd_pcm_oss_open(struct inode *inode, struct file *file) { int err; char task_name[32]; struct snd_pcm *pcm; struct snd_pcm_oss_file *pcm_oss_file; struct snd_pcm_oss_setup setup[2]; int nonblock; wait_queue_entry_t wait; err = nonseekable_open(inode, file); if (err < 0) return err; pcm = snd_lookup_oss_minor_data(iminor(inode), SNDRV_OSS_DEVICE_TYPE_PCM); if (pcm == NULL) { err = -ENODEV; goto __error1; } err = snd_card_file_add(pcm->card, file); if (err < 0) goto __error1; if (!try_module_get(pcm->card->module)) { err = -EFAULT; goto __error2; } if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { err = -EFAULT; goto __error; } memset(setup, 0, sizeof(setup)); if (file->f_mode & FMODE_WRITE) snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name, &setup[0]); if (file->f_mode & FMODE_READ) snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name, &setup[1]); nonblock = !!(file->f_flags & O_NONBLOCK); if (!nonblock) nonblock = nonblock_open; init_waitqueue_entry(&wait, current); add_wait_queue(&pcm->open_wait, &wait); mutex_lock(&pcm->open_mutex); while (1) { err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, iminor(inode), setup); if (err >= 0) break; if (err == -EAGAIN) { if (nonblock) { err = -EBUSY; break; } } else break; set_current_state(TASK_INTERRUPTIBLE); mutex_unlock(&pcm->open_mutex); schedule(); mutex_lock(&pcm->open_mutex); if (pcm->card->shutdown) { err = -ENODEV; break; } if (signal_pending(current)) { err = -ERESTARTSYS; break; } } remove_wait_queue(&pcm->open_wait, &wait); mutex_unlock(&pcm->open_mutex); if (err < 0) goto __error; snd_card_unref(pcm->card); return err; __error: module_put(pcm->card->module); __error2: snd_card_file_remove(pcm->card, file); __error1: if (pcm) snd_card_unref(pcm->card); return err; } static int snd_pcm_oss_release(struct inode *inode, struct file *file) { struct snd_pcm *pcm; struct snd_pcm_substream *substream; struct snd_pcm_oss_file *pcm_oss_file; pcm_oss_file = file->private_data; substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream == NULL) substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; if (snd_BUG_ON(!substream)) return -ENXIO; pcm = substream->pcm; if (!pcm->card->shutdown) snd_pcm_oss_sync(pcm_oss_file); mutex_lock(&pcm->open_mutex); snd_pcm_oss_release_file(pcm_oss_file); mutex_unlock(&pcm->open_mutex); wake_up(&pcm->open_wait); module_put(pcm->card->module); snd_card_file_remove(pcm->card, file); return 0; } static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct snd_pcm_oss_file *pcm_oss_file; int __user *p = (int __user *)arg; int res; pcm_oss_file = file->private_data; if (cmd == OSS_GETVERSION) return put_user(SNDRV_OSS_VERSION, p); if (cmd == OSS_ALSAEMULVER) return put_user(1, p); #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ struct snd_pcm_substream *substream; int idx; for (idx = 0; idx < 2; ++idx) { substream = pcm_oss_file->streams[idx]; if (substream != NULL) break; } if (snd_BUG_ON(idx >= 2)) return -ENXIO; return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); } #endif if (((cmd >> 8) & 0xff) != 'P') return -EINVAL; #ifdef OSS_DEBUG pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); #endif switch (cmd) { case SNDCTL_DSP_RESET: return snd_pcm_oss_reset(pcm_oss_file); case SNDCTL_DSP_SYNC: return snd_pcm_oss_sync(pcm_oss_file); case SNDCTL_DSP_SPEED: if (get_user(res, p)) return -EFAULT; res = snd_pcm_oss_set_rate(pcm_oss_file, res); if (res < 0) return res; return put_user(res, p); case SOUND_PCM_READ_RATE: res = snd_pcm_oss_get_rate(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_STEREO: if (get_user(res, p)) return -EFAULT; res = res > 0 ? 2 : 1; res = snd_pcm_oss_set_channels(pcm_oss_file, res); if (res < 0) return res; return put_user(--res, p); case SNDCTL_DSP_GETBLKSIZE: res = snd_pcm_oss_get_block_size(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_SETFMT: if (get_user(res, p)) return -EFAULT; res = snd_pcm_oss_set_format(pcm_oss_file, res); if (res < 0) return res; return put_user(res, p); case SOUND_PCM_READ_BITS: res = snd_pcm_oss_get_format(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_CHANNELS: if (get_user(res, p)) return -EFAULT; res = snd_pcm_oss_set_channels(pcm_oss_file, res); if (res < 0) return res; return put_user(res, p); case SOUND_PCM_READ_CHANNELS: res = snd_pcm_oss_get_channels(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SOUND_PCM_WRITE_FILTER: case SOUND_PCM_READ_FILTER: return -EIO; case SNDCTL_DSP_POST: return snd_pcm_oss_post(pcm_oss_file); case SNDCTL_DSP_SUBDIVIDE: if (get_user(res, p)) return -EFAULT; res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_SETFRAGMENT: if (get_user(res, p)) return -EFAULT; return snd_pcm_oss_set_fragment(pcm_oss_file, res); case SNDCTL_DSP_GETFMTS: res = snd_pcm_oss_get_formats(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_GETOSPACE: case SNDCTL_DSP_GETISPACE: return snd_pcm_oss_get_space(pcm_oss_file, cmd == SNDCTL_DSP_GETISPACE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, (struct audio_buf_info __user *) arg); case SNDCTL_DSP_NONBLOCK: return snd_pcm_oss_nonblock(file); case SNDCTL_DSP_GETCAPS: res = snd_pcm_oss_get_caps(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_GETTRIGGER: res = snd_pcm_oss_get_trigger(pcm_oss_file); if (res < 0) return res; return put_user(res, p); case SNDCTL_DSP_SETTRIGGER: if (get_user(res, p)) return -EFAULT; return snd_pcm_oss_set_trigger(pcm_oss_file, res); case SNDCTL_DSP_GETIPTR: case SNDCTL_DSP_GETOPTR: return snd_pcm_oss_get_ptr(pcm_oss_file, cmd == SNDCTL_DSP_GETIPTR ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, (struct count_info __user *) arg); case SNDCTL_DSP_MAPINBUF: case SNDCTL_DSP_MAPOUTBUF: return snd_pcm_oss_get_mapbuf(pcm_oss_file, cmd == SNDCTL_DSP_MAPINBUF ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, (struct buffmem_desc __user *) arg); case SNDCTL_DSP_SETSYNCRO: /* stop DMA now.. */ return 0; case SNDCTL_DSP_SETDUPLEX: if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) return 0; return -EIO; case SNDCTL_DSP_GETODELAY: res = snd_pcm_oss_get_odelay(pcm_oss_file); if (res < 0) { /* it's for sure, some broken apps don't check for error codes */ put_user(0, p); return res; } return put_user(res, p); case SNDCTL_DSP_PROFILE: return 0; /* silently ignore */ default: pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); } return -EINVAL; } #ifdef CONFIG_COMPAT /* all compatible */ static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) { /* * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, * which are not implemented for the native case either */ return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); } #else #define snd_pcm_oss_ioctl_compat NULL #endif static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) { struct snd_pcm_oss_file *pcm_oss_file; struct snd_pcm_substream *substream; pcm_oss_file = file->private_data; substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; if (substream == NULL) return -ENXIO; substream->f_flags = file->f_flags & O_NONBLOCK; #ifndef OSS_DEBUG return snd_pcm_oss_read1(substream, buf, count); #else { ssize_t res = snd_pcm_oss_read1(substream, buf, count); pcm_dbg(substream->pcm, "pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); return res; } #endif } static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) { struct snd_pcm_oss_file *pcm_oss_file; struct snd_pcm_substream *substream; long result; pcm_oss_file = file->private_data; substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream == NULL) return -ENXIO; substream->f_flags = file->f_flags & O_NONBLOCK; result = snd_pcm_oss_write1(substream, buf, count); #ifdef OSS_DEBUG pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); #endif return result; } static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; if (atomic_read(&substream->mmap_count)) return runtime->oss.prev_hw_ptr_period != get_hw_ptr_period(runtime); else return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; } static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; if (atomic_read(&substream->mmap_count)) return runtime->oss.prev_hw_ptr_period != get_hw_ptr_period(runtime); else return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; } static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) { struct snd_pcm_oss_file *pcm_oss_file; __poll_t mask; struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; pcm_oss_file = file->private_data; psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; mask = 0; if (psubstream != NULL) { struct snd_pcm_runtime *runtime = psubstream->runtime; poll_wait(file, &runtime->sleep, wait); scoped_guard(pcm_stream_lock_irq, psubstream) { if (runtime->state != SNDRV_PCM_STATE_DRAINING && (runtime->state != SNDRV_PCM_STATE_RUNNING || snd_pcm_oss_playback_ready(psubstream))) mask |= EPOLLOUT | EPOLLWRNORM; } } if (csubstream != NULL) { struct snd_pcm_runtime *runtime = csubstream->runtime; snd_pcm_state_t ostate; poll_wait(file, &runtime->sleep, wait); scoped_guard(pcm_stream_lock_irq, csubstream) { ostate = runtime->state; if (ostate != SNDRV_PCM_STATE_RUNNING || snd_pcm_oss_capture_ready(csubstream)) mask |= EPOLLIN | EPOLLRDNORM; } if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { struct snd_pcm_oss_file ofile; memset(&ofile, 0, sizeof(ofile)); ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; runtime->oss.trigger = 0; snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); } } return mask; } static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) { struct snd_pcm_oss_file *pcm_oss_file; struct snd_pcm_substream *substream = NULL; struct snd_pcm_runtime *runtime; int err; #ifdef OSS_DEBUG pr_debug("pcm_oss: mmap begin\n"); #endif pcm_oss_file = file->private_data; switch ((area->vm_flags & (VM_READ | VM_WRITE))) { case VM_READ | VM_WRITE: substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; if (substream) break; fallthrough; case VM_READ: substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; break; case VM_WRITE: substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; break; default: return -EINVAL; } /* set VM_READ access as well to fix memset() routines that do reads before writes (to improve performance) */ vm_flags_set(area, VM_READ); if (substream == NULL) return -ENXIO; runtime = substream->runtime; if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) return -EIO; if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; else return -EIO; if (runtime->oss.params) { /* use mutex_trylock() for params_lock for avoiding a deadlock * between mmap_lock and params_lock taken by * copy_from/to_user() in snd_pcm_oss_write/read() */ err = snd_pcm_oss_change_params(substream, true); if (err < 0) return err; } #ifdef CONFIG_SND_PCM_OSS_PLUGINS if (runtime->oss.plugin_first != NULL) return -EIO; #endif if (area->vm_pgoff != 0) return -EINVAL; err = snd_pcm_mmap_data(substream, file, area); if (err < 0) return err; runtime->oss.mmap_bytes = area->vm_end - area->vm_start; runtime->silence_threshold = 0; runtime->silence_size = 0; #ifdef OSS_DEBUG pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); #endif /* In mmap mode we never stop */ runtime->stop_threshold = runtime->boundary; return 0; } #ifdef CONFIG_SND_VERBOSE_PROCFS /* * /proc interface */ static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { struct snd_pcm_str *pstr = entry->private_data; struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; guard(mutex)(&pstr->oss.setup_mutex); while (setup) { snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", setup->task_name, setup->periods, setup->period_size, setup->disable ? " disable" : "", setup->direct ? " direct" : "", setup->block ? " block" : "", setup->nonblock ? " non-block" : "", setup->partialfrag ? " partial-frag" : "", setup->nosilence ? " no-silence" : ""); setup = setup->next; } } static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) { struct snd_pcm_oss_setup *setup, *setupn; for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; setup; setup = setupn) { setupn = setup->next; kfree(setup->task_name); kfree(setup); } pstr->oss.setup_list = NULL; } static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { struct snd_pcm_str *pstr = entry->private_data; char line[128], str[32], task_name[32]; const char *ptr; int idx1; struct snd_pcm_oss_setup *setup, *setup1, template; while (!snd_info_get_line(buffer, line, sizeof(line))) { guard(mutex)(&pstr->oss.setup_mutex); memset(&template, 0, sizeof(template)); ptr = snd_info_get_str(task_name, line, sizeof(task_name)); if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { snd_pcm_oss_proc_free_setup_list(pstr); continue; } for (setup = pstr->oss.setup_list; setup; setup = setup->next) { if (!strcmp(setup->task_name, task_name)) { template = *setup; break; } } ptr = snd_info_get_str(str, ptr, sizeof(str)); template.periods = simple_strtoul(str, NULL, 10); ptr = snd_info_get_str(str, ptr, sizeof(str)); template.period_size = simple_strtoul(str, NULL, 10); for (idx1 = 31; idx1 >= 0; idx1--) if (template.period_size & (1 << idx1)) break; for (idx1--; idx1 >= 0; idx1--) template.period_size &= ~(1 << idx1); do { ptr = snd_info_get_str(str, ptr, sizeof(str)); if (!strcmp(str, "disable")) { template.disable = 1; } else if (!strcmp(str, "direct")) { template.direct = 1; } else if (!strcmp(str, "block")) { template.block = 1; } else if (!strcmp(str, "non-block")) { template.nonblock = 1; } else if (!strcmp(str, "partial-frag")) { template.partialfrag = 1; } else if (!strcmp(str, "no-silence")) { template.nosilence = 1; } else if (!strcmp(str, "buggy-ptr")) { template.buggyptr = 1; } } while (*str); if (setup == NULL) { setup = kmalloc(sizeof(*setup), GFP_KERNEL); if (! setup) { buffer->error = -ENOMEM; return; } if (pstr->oss.setup_list == NULL) pstr->oss.setup_list = setup; else { for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next); setup1->next = setup; } template.task_name = kstrdup(task_name, GFP_KERNEL); if (! template.task_name) { kfree(setup); buffer->error = -ENOMEM; return; } } *setup = template; } } static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) { int stream; for (stream = 0; stream < 2; ++stream) { struct snd_info_entry *entry; struct snd_pcm_str *pstr = &pcm->streams[stream]; if (pstr->substream_count == 0) continue; entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root); if (entry) { entry->content = SNDRV_INFO_CONTENT_TEXT; entry->mode = S_IFREG | 0644; entry->c.text.read = snd_pcm_oss_proc_read; entry->c.text.write = snd_pcm_oss_proc_write; entry->private_data = pstr; if (snd_info_register(entry) < 0) { snd_info_free_entry(entry); entry = NULL; } } pstr->oss.proc_entry = entry; } } static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) { int stream; for (stream = 0; stream < 2; ++stream) { struct snd_pcm_str *pstr = &pcm->streams[stream]; snd_info_free_entry(pstr->oss.proc_entry); pstr->oss.proc_entry = NULL; snd_pcm_oss_proc_free_setup_list(pstr); } } #else /* !CONFIG_SND_VERBOSE_PROCFS */ static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm) { } static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm) { } #endif /* CONFIG_SND_VERBOSE_PROCFS */ /* * ENTRY functions */ static const struct file_operations snd_pcm_oss_f_reg = { .owner = THIS_MODULE, .read = snd_pcm_oss_read, .write = snd_pcm_oss_write, .open = snd_pcm_oss_open, .release = snd_pcm_oss_release, .llseek = no_llseek, .poll = snd_pcm_oss_poll, .unlocked_ioctl = snd_pcm_oss_ioctl, .compat_ioctl = snd_pcm_oss_ioctl_compat, .mmap = snd_pcm_oss_mmap, }; static void register_oss_dsp(struct snd_pcm *pcm, int index) { if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, pcm->card, index, &snd_pcm_oss_f_reg, pcm) < 0) { pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device); } } static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) { pcm->oss.reg = 0; if (dsp_map[pcm->card->number] == (int)pcm->device) { char name[128]; int duplex; register_oss_dsp(pcm, 0); duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); #ifdef SNDRV_OSS_INFO_DEV_AUDIO snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number, name); #endif pcm->oss.reg++; pcm->oss.reg_mask |= 1; } if (adsp_map[pcm->card->number] == (int)pcm->device) { register_oss_dsp(pcm, 1); pcm->oss.reg++; pcm->oss.reg_mask |= 2; } if (pcm->oss.reg) snd_pcm_oss_proc_init(pcm); return 0; } static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) { if (pcm->oss.reg) { if (pcm->oss.reg_mask & 1) { pcm->oss.reg_mask &= ~1; snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, pcm->card, 0); } if (pcm->oss.reg_mask & 2) { pcm->oss.reg_mask &= ~2; snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, pcm->card, 1); } if (dsp_map[pcm->card->number] == (int)pcm->device) { #ifdef SNDRV_OSS_INFO_DEV_AUDIO snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); #endif } pcm->oss.reg = 0; } return 0; } static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) { snd_pcm_oss_disconnect_minor(pcm); snd_pcm_oss_proc_done(pcm); return 0; } static struct snd_pcm_notify snd_pcm_oss_notify = { .n_register = snd_pcm_oss_register_minor, .n_disconnect = snd_pcm_oss_disconnect_minor, .n_unregister = snd_pcm_oss_unregister_minor, }; static int __init alsa_pcm_oss_init(void) { int i; int err; /* check device map table */ for (i = 0; i < SNDRV_CARDS; i++) { if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", i, dsp_map[i]); dsp_map[i] = 0; } if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", i, adsp_map[i]); adsp_map[i] = 1; } } err = snd_pcm_notify(&snd_pcm_oss_notify, 0); if (err < 0) return err; return 0; } static void __exit alsa_pcm_oss_exit(void) { snd_pcm_notify(&snd_pcm_oss_notify, 1); } module_init(alsa_pcm_oss_init) module_exit(alsa_pcm_oss_exit)
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