diff options
Diffstat (limited to 'sound/core/oss/pcm_oss.c')
| -rw-r--r-- | sound/core/oss/pcm_oss.c | 3110 |
1 files changed, 3110 insertions, 0 deletions
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c new file mode 100644 index 00000000..23c34a02 --- /dev/null +++ b/sound/core/oss/pcm_oss.c @@ -0,0 +1,3110 @@ +/* + * Digital Audio (PCM) abstract layer / OSS compatible + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#if 0 +#define PLUGIN_DEBUG +#endif +#if 0 +#define OSS_DEBUG +#endif + +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <linux/vmalloc.h> +#include <linux/moduleparam.h> +#include <linux/math64.h> +#include <linux/string.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 int 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); + +static inline mm_segment_t snd_enter_user(void) +{ + mm_segment_t fs = get_fs(); + set_fs(get_ds()); + return fs; +} + +static inline void snd_leave_user(mm_segment_t fs) +{ + set_fs(fs); +} + +/* + * 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 unsigned 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) { + 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) { + 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) { + 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 = 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; + if (max < 0) + goto _end; + if ((unsigned int)min == saved_min && mindir == valdir) + goto _end; + params1 = kmalloc(sizeof(*params1), GFP_KERNEL); + if (params1 == NULL) { + kfree(save); + return -ENOMEM; + } + *params1 = *save; + max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); + if (max < 0) { + kfree(params1); + goto _end; + } + if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { + *params = *params1; + last = 1; + } + kfree(params1); + } else { + *params = *save; + max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); + if (max < 0) { + kfree(save); + return max; + } + last = 1; + } + _end: + kfree(save); + if (last) + v = snd_pcm_hw_param_last(pcm, params, var, dir); + else + v = snd_pcm_hw_param_first(pcm, params, var, dir); + snd_BUG_ON(v < 0); + 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) { + 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) { + 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) +{ + size_t s; + size_t oss_buffer_size, oss_period_size, oss_periods; + size_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_plug_client_size(substream, + snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; + oss_buffer_size = 1 << ld2(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)); + min_period_size *= oss_frame_size; + min_period_size = 1 << (ld2(min_period_size - 1) + 1); + 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)); + max_period_size *= oss_frame_size; + max_period_size = 1 << ld2(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 (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; + 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) +{ + struct snd_interval *it; + struct snd_pcm_hw_params *save; + unsigned int rate, prev; + + save = kmalloc(sizeof(*save), GFP_KERNEL); + if (save == NULL) + return -ENOMEM; + *save = *params; + it = hw_param_interval(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) { + kfree(save); + return rate; + } + *params = *save; + } + prev = rate; + rate += best_rate; + if (rate <= prev) + break; + } + + /* not found, use the nearest rate */ + kfree(save); + return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); +} + +static int snd_pcm_oss_change_params(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; + struct snd_mask sformat_mask; + struct snd_mask mask; + + if (mutex_lock_interruptible(&runtime->oss.params_lock)) + return -EINTR; + sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); + params = kmalloc(sizeof(*params), GFP_KERNEL); + sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); + if (!sw_params || !params || !sparams) { + snd_printd("No memory\n"); + 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) { + snd_printd("No usable accesses\n"); + err = -EINVAL; + goto failure; + } + choose_rate(substream, sparams, runtime->oss.rate); + snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); + + format = snd_pcm_oss_format_from(runtime->oss.format); + + sformat_mask = *hw_param_mask(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(&sformat_mask, (__force int)sformat)) { + for (sformat = (__force snd_pcm_format_t)0; + (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; + sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { + if (snd_mask_test(&sformat_mask, (__force int)sformat) && + snd_pcm_oss_format_to(sformat) >= 0) + break; + } + if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { + snd_printd("Cannot find a format!!!\n"); + err = -EINVAL; + goto failure; + } + } + 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; + +#ifdef CONFIG_SND_PCM_OSS_PLUGINS + snd_pcm_oss_plugin_clear(substream); + if (!direct) { + /* add necessary plugins */ + snd_pcm_oss_plugin_clear(substream); + if ((err = snd_pcm_plug_format_plugins(substream, + params, + sparams)) < 0) { + snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); + snd_pcm_oss_plugin_clear(substream); + goto failure; + } + if (runtime->oss.plugin_first) { + struct snd_pcm_plugin *plugin; + if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { + snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); + snd_pcm_oss_plugin_clear(substream); + 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) { + snd_pcm_oss_plugin_clear(substream); + goto failure; + } + } + } +#endif + + 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); + + if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { + snd_printd("HW_PARAMS failed: %i\n", err); + goto failure; + } + + memset(sw_params, 0, sizeof(*sw_params)); + 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; + } + + if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { + snd_printd("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 *= oss_frame_size; + + oss_buffer_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); + + vfree(runtime->oss.buffer); + runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); + 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: + kfree(sw_params); + kfree(params); + kfree(sparams); + 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); + if (err < 0) + return err; + } + } + if (!asubstream) + return -EIO; + if (r_substream) + *r_substream = asubstream; + return 0; +} + +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) { + snd_printd("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; + + if (substream == NULL) + return 0; + runtime = substream->runtime; + if (runtime->oss.params) { + err = snd_pcm_oss_change_params(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->status->state == SNDRV_PCM_STATE_XRUN || + runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { +#ifdef OSS_DEBUG + if (runtime->status->state == SNDRV_PCM_STATE_XRUN) + printk(KERN_DEBUG "pcm_oss: write: " + "recovering from XRUN\n"); + else + printk(KERN_DEBUG "pcm_oss: write: " + "recovering from SUSPEND\n"); +#endif + ret = snd_pcm_oss_prepare(substream); + if (ret < 0) + break; + } + if (in_kernel) { + mm_segment_t fs; + fs = snd_enter_user(); + ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); + snd_leave_user(fs); + } else { + ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); + } + if (ret != -EPIPE && ret != -ESTRPIPE) + break; + /* test, if we can't store new data, because the stream */ + /* has not been started */ + if (runtime->status->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->status->state == SNDRV_PCM_STATE_XRUN || + runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { +#ifdef OSS_DEBUG + if (runtime->status->state == SNDRV_PCM_STATE_XRUN) + printk(KERN_DEBUG "pcm_oss: read: " + "recovering from XRUN\n"); + else + printk(KERN_DEBUG "pcm_oss: read: " + "recovering from SUSPEND\n"); +#endif + ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); + if (ret < 0) + break; + } else if (runtime->status->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; + if (in_kernel) { + mm_segment_t fs; + fs = snd_enter_user(); + ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); + snd_leave_user(fs); + } else { + ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); + } + if (ret == -EPIPE) { + if (runtime->status->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; +} + +snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + int ret; + while (1) { + if (runtime->status->state == SNDRV_PCM_STATE_XRUN || + runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { +#ifdef OSS_DEBUG + if (runtime->status->state == SNDRV_PCM_STATE_XRUN) + printk(KERN_DEBUG "pcm_oss: writev: " + "recovering from XRUN\n"); + else + printk(KERN_DEBUG "pcm_oss: writev: " + "recovering from SUSPEND\n"); +#endif + ret = snd_pcm_oss_prepare(substream); + if (ret < 0) + break; + } + if (in_kernel) { + mm_segment_t fs; + fs = snd_enter_user(); + ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); + snd_leave_user(fs); + } else { + ret = snd_pcm_lib_writev(substream, (void __user **)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->status->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, int in_kernel) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + int ret; + while (1) { + if (runtime->status->state == SNDRV_PCM_STATE_XRUN || + runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { +#ifdef OSS_DEBUG + if (runtime->status->state == SNDRV_PCM_STATE_XRUN) + printk(KERN_DEBUG "pcm_oss: readv: " + "recovering from XRUN\n"); + else + printk(KERN_DEBUG "pcm_oss: readv: " + "recovering from SUSPEND\n"); +#endif + ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); + if (ret < 0) + break; + } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { + ret = snd_pcm_oss_prepare(substream); + if (ret < 0) + break; + } + if (in_kernel) { + mm_segment_t fs; + fs = snd_enter_user(); + ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); + snd_leave_user(fs); + } else { + ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); + } + if (ret != -EPIPE && ret != -ESTRPIPE) + break; + } + return ret; +} + +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; + struct snd_pcm_runtime *runtime = substream->runtime; + + if (atomic_read(&substream->mmap_count)) + return -ENXIO; + + if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) + return tmp; + mutex_lock(&runtime->oss.params_lock); + while (bytes > 0) { + 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) + break; + } + } + mutex_unlock(&runtime->oss.params_lock); + return xfer; + + err: + mutex_unlock(&runtime->oss.params_lock); + 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; + struct snd_pcm_runtime *runtime = substream->runtime; + + if (atomic_read(&substream->mmap_count)) + return -ENXIO; + + if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) + return tmp; + mutex_lock(&runtime->oss.params_lock); + while (bytes > 0) { + 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; + } + } + mutex_unlock(&runtime->oss.params_lock); + return xfer; + + err: + mutex_unlock(&runtime->oss.params_lock); + 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); + runtime->oss.prepare = 1; + runtime->oss.buffer_used = 0; + runtime->oss.prev_hw_ptr_period = 0; + runtime->oss.period_ptr = 0; + } + 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) { + if ((err = snd_pcm_oss_make_ready(substream)) < 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_t wait; + + runtime = substream->runtime; + init_waitqueue_entry(&wait, current); + add_wait_queue(&runtime->sleep, &wait); +#ifdef OSS_DEBUG + printk(KERN_DEBUG "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); + snd_pcm_stream_lock_irq(substream); + state = runtime->status->state; + snd_pcm_stream_unlock_irq(substream); + 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) { + snd_printk(KERN_ERR "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; + if ((err = snd_pcm_oss_make_ready(substream)) < 0) + return err; + format = snd_pcm_oss_format_from(runtime->oss.format); + width = snd_pcm_format_physical_width(format); + mutex_lock(&runtime->oss.params_lock); + if (runtime->oss.buffer_used > 0) { +#ifdef OSS_DEBUG + printk(KERN_DEBUG "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) { + mutex_unlock(&runtime->oss.params_lock); + return err; + } + } else if (runtime->oss.period_ptr > 0) { +#ifdef OSS_DEBUG + printk(KERN_DEBUG "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) { + mutex_unlock(&runtime->oss.params_lock); + return err; + } + } + /* + * 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) { + size = (runtime->frame_bits * size) / 8; + while (size > 0) { + mm_segment_t fs; + size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; + size -= size1; + size1 *= 8; + size1 /= runtime->sample_bits; + snd_pcm_format_set_silence(runtime->format, + runtime->oss.buffer, + size1); + size1 /= runtime->channels; /* frames */ + fs = snd_enter_user(); + snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); + snd_leave_user(fs); + } + } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { + void __user *buffers[runtime->channels]; + memset(buffers, 0, runtime->channels * sizeof(void *)); + snd_pcm_lib_writev(substream, buffers, size); + } + } + mutex_unlock(&runtime->oss.params_lock); + /* + * 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; + runtime->oss.prepare = 1; + } + + substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; + if (substream != NULL) { + if ((err = snd_pcm_oss_make_ready(substream)) < 0) + return err; + runtime = substream->runtime; + err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); + if (err < 0) + return err; + runtime->oss.buffer_used = 0; + runtime->oss.prepare = 1; + } + 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; + if (substream == NULL) + continue; + runtime = substream->runtime; + if (rate < 1000) + rate = 1000; + else if (rate > 192000) + rate = 192000; + if (runtime->oss.rate != rate) { + runtime->oss.params = 1; + runtime->oss.rate = rate; + } + } + 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; + + if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 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; + if (substream == NULL) + continue; + runtime = substream->runtime; + if (runtime->oss.channels != channels) { + runtime->oss.params = 1; + runtime->oss.channels = channels; + } + } + 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; + + if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 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; + + if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 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; + unsigned int formats = 0; + struct snd_mask format_mask; + int fmt; + + if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 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); + format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); + kfree(params); + if (err < 0) + return err; + for (fmt = 0; fmt < 32; ++fmt) { + if (snd_mask_test(&format_mask, fmt)) { + int f = snd_pcm_oss_format_to(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; + + 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; + if (runtime->oss.format != format) { + runtime->oss.params = 1; + runtime->oss.format = format; + } + } + } + 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; + + if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 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; + + if (substream == NULL) + return 0; + 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]; + if (substream == NULL) + continue; + if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 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; + + if (substream == NULL) + return 0; + runtime = substream->runtime; + if (runtime->oss.subdivision || runtime->oss.fragshift) + return -EINVAL; + runtime->oss.fragshift = val & 0xffff; + 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]; + if (substream == NULL) + continue; + if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 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 + printk(KERN_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) { + if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) + return err; + } + if (csubstream) { + if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) + return err; + } + if (psubstream) { + runtime = psubstream->runtime; + 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; + } + err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); + if (err < 0) + return err; + } + _skip1: + if (csubstream) { + runtime = csubstream->runtime; + 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; + } + err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); + if (err < 0) + return err; + } + _skip2: + 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; + if ((err = snd_pcm_oss_make_ready(substream)) < 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; + if ((err = snd_pcm_oss_make_ready(substream)) < 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)) < 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 + printk(KERN_DEBUG "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 + // snd_printd("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; + + mutex_lock(&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; + mutex_unlock(&pcm->streams[stream].oss.setup_mutex); +} + +static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime; + runtime = substream->runtime; + vfree(runtime->oss.buffer); + runtime->oss.buffer = NULL; +#ifdef CONFIG_SND_PCM_OSS_PLUGINS + snd_pcm_oss_plugin_clear(substream); +#endif + 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; +} + +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; + substream->file = pcm_oss_file; + 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_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 (signal_pending(current)) { + err = -ERESTARTSYS; + break; + } + } + remove_wait_queue(&pcm->open_wait, &wait); + mutex_unlock(&pcm->open_mutex); + if (err < 0) + goto __error; + return err; + + __error: + module_put(pcm->card->module); + __error2: + snd_card_file_remove(pcm->card, file); + __error1: + 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 defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) + 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 + printk(KERN_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; + if ((res = snd_pcm_oss_set_rate(pcm_oss_file, 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; + if ((res = snd_pcm_oss_set_channels(pcm_oss_file, 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: + snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); + } + return -EINVAL; +} + +#ifdef CONFIG_COMPAT +/* all compatible */ +#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl +#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); + printk(KERN_DEBUG "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 + printk(KERN_DEBUG "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 unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) +{ + struct snd_pcm_oss_file *pcm_oss_file; + unsigned int 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); + snd_pcm_stream_lock_irq(psubstream); + if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && + (runtime->status->state != SNDRV_PCM_STATE_RUNNING || + snd_pcm_oss_playback_ready(psubstream))) + mask |= POLLOUT | POLLWRNORM; + snd_pcm_stream_unlock_irq(psubstream); + } + if (csubstream != NULL) { + struct snd_pcm_runtime *runtime = csubstream->runtime; + snd_pcm_state_t ostate; + poll_wait(file, &runtime->sleep, wait); + snd_pcm_stream_lock_irq(csubstream); + if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || + snd_pcm_oss_capture_ready(csubstream)) + mask |= POLLIN | POLLRDNORM; + snd_pcm_stream_unlock_irq(csubstream); + 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 + printk(KERN_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; + /* Fall through */ + 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) */ + area->vm_flags |= 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) { + if ((err = snd_pcm_oss_change_params(substream)) < 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 + printk(KERN_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; + mutex_lock(&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; + } + mutex_unlock(&pstr->oss.setup_mutex); +} + +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))) { + mutex_lock(&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); + mutex_unlock(&pstr->oss.setup_mutex); + 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; + mutex_unlock(&pstr->oss.setup_mutex); + 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; + mutex_unlock(&pstr->oss.setup_mutex); + return; + } + } + *setup = template; + mutex_unlock(&pstr->oss.setup_mutex); + } +} + +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; + if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { + entry->content = SNDRV_INFO_CONTENT_TEXT; + entry->mode = S_IFREG | S_IRUGO | S_IWUSR; + 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 */ +#define snd_pcm_oss_proc_init(pcm) +#define snd_pcm_oss_proc_done(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) +{ + char name[128]; + sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); + if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, + pcm->card, index, &snd_pcm_oss_f_reg, + pcm, name) < 0) { + snd_printk(KERN_ERR "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) { + snd_printk(KERN_ERR "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) { + snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", + i, adsp_map[i]); + adsp_map[i] = 1; + } + } + if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 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) |