| /* |
| * 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 |
| * |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/usb.h> |
| #include <linux/usb/audio.h> |
| |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| |
| #include "usbaudio.h" |
| #include "card.h" |
| #include "quirks.h" |
| #include "helper.h" |
| #include "debug.h" |
| |
| /* |
| * parse the audio format type I descriptor |
| * and returns the corresponding pcm format |
| * |
| * @dev: usb device |
| * @fp: audioformat record |
| * @format: the format tag (wFormatTag) |
| * @fmt: the format type descriptor |
| */ |
| static u64 parse_audio_format_i_type(struct snd_usb_audio *chip, |
| struct audioformat *fp, |
| int format, void *_fmt, |
| int protocol) |
| { |
| int sample_width, sample_bytes; |
| u64 pcm_formats; |
| |
| switch (protocol) { |
| case UAC_VERSION_1: { |
| struct uac_format_type_i_discrete_descriptor *fmt = _fmt; |
| sample_width = fmt->bBitResolution; |
| sample_bytes = fmt->bSubframeSize; |
| format = 1 << format; |
| break; |
| } |
| |
| case UAC_VERSION_2: { |
| struct uac_format_type_i_ext_descriptor *fmt = _fmt; |
| sample_width = fmt->bBitResolution; |
| sample_bytes = fmt->bSubslotSize; |
| format <<= 1; |
| break; |
| } |
| |
| default: |
| return -EINVAL; |
| } |
| |
| pcm_formats = 0; |
| |
| if (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED)) { |
| /* some devices don't define this correctly... */ |
| snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n", |
| chip->dev->devnum, fp->iface, fp->altsetting); |
| format = 1 << UAC_FORMAT_TYPE_I_PCM; |
| } |
| if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) { |
| if (sample_width > sample_bytes * 8) { |
| snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n", |
| chip->dev->devnum, fp->iface, fp->altsetting, |
| sample_width, sample_bytes); |
| } |
| /* check the format byte size */ |
| switch (sample_bytes) { |
| case 1: |
| pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
| break; |
| case 2: |
| if (snd_usb_is_big_endian_format(chip, fp)) |
| pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */ |
| else |
| pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE; |
| break; |
| case 3: |
| if (snd_usb_is_big_endian_format(chip, fp)) |
| pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */ |
| else |
| pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE; |
| break; |
| case 4: |
| pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE; |
| break; |
| default: |
| snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n", |
| chip->dev->devnum, fp->iface, fp->altsetting, |
| sample_width, sample_bytes); |
| break; |
| } |
| } |
| if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) { |
| /* Dallas DS4201 workaround: it advertises U8 format, but really |
| supports S8. */ |
| if (chip->usb_id == USB_ID(0x04fa, 0x4201)) |
| pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
| else |
| pcm_formats |= SNDRV_PCM_FMTBIT_U8; |
| } |
| if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) { |
| pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; |
| } |
| if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) { |
| pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; |
| } |
| if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) { |
| pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW; |
| } |
| if (format & ~0x3f) { |
| snd_printk(KERN_INFO "%d:%u:%d : unsupported format bits %#x\n", |
| chip->dev->devnum, fp->iface, fp->altsetting, format); |
| } |
| return pcm_formats; |
| } |
| |
| |
| /* |
| * parse the format descriptor and stores the possible sample rates |
| * on the audioformat table (audio class v1). |
| * |
| * @dev: usb device |
| * @fp: audioformat record |
| * @fmt: the format descriptor |
| * @offset: the start offset of descriptor pointing the rate type |
| * (7 for type I and II, 8 for type II) |
| */ |
| static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, |
| unsigned char *fmt, int offset) |
| { |
| int nr_rates = fmt[offset]; |
| |
| if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
| chip->dev->devnum, fp->iface, fp->altsetting); |
| return -1; |
| } |
| |
| if (nr_rates) { |
| /* |
| * build the rate table and bitmap flags |
| */ |
| int r, idx; |
| |
| fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); |
| if (fp->rate_table == NULL) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| return -1; |
| } |
| |
| fp->nr_rates = 0; |
| fp->rate_min = fp->rate_max = 0; |
| for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { |
| unsigned int rate = combine_triple(&fmt[idx]); |
| if (!rate) |
| continue; |
| /* C-Media CM6501 mislabels its 96 kHz altsetting */ |
| if (rate == 48000 && nr_rates == 1 && |
| (chip->usb_id == USB_ID(0x0d8c, 0x0201) || |
| chip->usb_id == USB_ID(0x0d8c, 0x0102)) && |
| fp->altsetting == 5 && fp->maxpacksize == 392) |
| rate = 96000; |
| /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */ |
| if (rate == 16000 && chip->usb_id == USB_ID(0x041e, 0x4068)) |
| rate = 8000; |
| |
| fp->rate_table[fp->nr_rates] = rate; |
| if (!fp->rate_min || rate < fp->rate_min) |
| fp->rate_min = rate; |
| if (!fp->rate_max || rate > fp->rate_max) |
| fp->rate_max = rate; |
| fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
| fp->nr_rates++; |
| } |
| if (!fp->nr_rates) { |
| hwc_debug("All rates were zero. Skipping format!\n"); |
| return -1; |
| } |
| } else { |
| /* continuous rates */ |
| fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
| fp->rate_min = combine_triple(&fmt[offset + 1]); |
| fp->rate_max = combine_triple(&fmt[offset + 4]); |
| } |
| return 0; |
| } |
| |
| /* |
| * parse the format descriptor and stores the possible sample rates |
| * on the audioformat table (audio class v2). |
| */ |
| static int parse_audio_format_rates_v2(struct snd_usb_audio *chip, |
| struct audioformat *fp, |
| struct usb_host_interface *iface) |
| { |
| struct usb_device *dev = chip->dev; |
| unsigned char tmp[2], *data; |
| int i, nr_rates, data_size, ret = 0; |
| |
| /* get the number of sample rates first by only fetching 2 bytes */ |
| ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
| USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
| 0x0100, chip->clock_id << 8, tmp, sizeof(tmp), 1000); |
| |
| if (ret < 0) { |
| snd_printk(KERN_ERR "unable to retrieve number of sample rates\n"); |
| goto err; |
| } |
| |
| nr_rates = (tmp[1] << 8) | tmp[0]; |
| data_size = 2 + 12 * nr_rates; |
| data = kzalloc(data_size, GFP_KERNEL); |
| if (!data) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| /* now get the full information */ |
| ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
| USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
| 0x0100, chip->clock_id << 8, data, data_size, 1000); |
| |
| if (ret < 0) { |
| snd_printk(KERN_ERR "unable to retrieve sample rate range\n"); |
| ret = -EINVAL; |
| goto err_free; |
| } |
| |
| fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); |
| if (!fp->rate_table) { |
| ret = -ENOMEM; |
| goto err_free; |
| } |
| |
| fp->nr_rates = 0; |
| fp->rate_min = fp->rate_max = 0; |
| |
| for (i = 0; i < nr_rates; i++) { |
| int rate = combine_quad(&data[2 + 12 * i]); |
| |
| fp->rate_table[fp->nr_rates] = rate; |
| if (!fp->rate_min || rate < fp->rate_min) |
| fp->rate_min = rate; |
| if (!fp->rate_max || rate > fp->rate_max) |
| fp->rate_max = rate; |
| fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
| fp->nr_rates++; |
| } |
| |
| err_free: |
| kfree(data); |
| err: |
| return ret; |
| } |
| |
| /* |
| * parse the format type I and III descriptors |
| */ |
| static int parse_audio_format_i(struct snd_usb_audio *chip, |
| struct audioformat *fp, |
| int format, void *_fmt, |
| struct usb_host_interface *iface) |
| { |
| struct usb_interface_descriptor *altsd = get_iface_desc(iface); |
| struct uac_format_type_i_discrete_descriptor *fmt = _fmt; |
| int protocol = altsd->bInterfaceProtocol; |
| int pcm_format, ret; |
| |
| if (fmt->bFormatType == UAC_FORMAT_TYPE_III) { |
| /* FIXME: the format type is really IECxxx |
| * but we give normal PCM format to get the existing |
| * apps working... |
| */ |
| switch (chip->usb_id) { |
| |
| case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
| if (chip->setup == 0x00 && |
| fp->altsetting == 6) |
| pcm_format = SNDRV_PCM_FORMAT_S16_BE; |
| else |
| pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
| break; |
| default: |
| pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
| } |
| fp->formats = 1uLL << pcm_format; |
| } else { |
| fp->formats = parse_audio_format_i_type(chip, fp, format, |
| fmt, protocol); |
| if (!fp->formats) |
| return -1; |
| } |
| |
| /* gather possible sample rates */ |
| /* audio class v1 reports possible sample rates as part of the |
| * proprietary class specific descriptor. |
| * audio class v2 uses class specific EP0 range requests for that. |
| */ |
| switch (protocol) { |
| case UAC_VERSION_1: |
| fp->channels = fmt->bNrChannels; |
| ret = parse_audio_format_rates_v1(chip, fp, _fmt, 7); |
| break; |
| case UAC_VERSION_2: |
| /* fp->channels is already set in this case */ |
| ret = parse_audio_format_rates_v2(chip, fp, iface); |
| break; |
| } |
| |
| if (fp->channels < 1) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n", |
| chip->dev->devnum, fp->iface, fp->altsetting, fp->channels); |
| return -1; |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * parse the format type II descriptor |
| */ |
| static int parse_audio_format_ii(struct snd_usb_audio *chip, |
| struct audioformat *fp, |
| int format, void *_fmt, |
| struct usb_host_interface *iface) |
| { |
| int brate, framesize, ret; |
| struct usb_interface_descriptor *altsd = get_iface_desc(iface); |
| int protocol = altsd->bInterfaceProtocol; |
| |
| switch (format) { |
| case UAC_FORMAT_TYPE_II_AC3: |
| /* FIXME: there is no AC3 format defined yet */ |
| // fp->formats = SNDRV_PCM_FMTBIT_AC3; |
| fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */ |
| break; |
| case UAC_FORMAT_TYPE_II_MPEG: |
| fp->formats = SNDRV_PCM_FMTBIT_MPEG; |
| break; |
| default: |
| snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n", |
| chip->dev->devnum, fp->iface, fp->altsetting, format); |
| fp->formats = SNDRV_PCM_FMTBIT_MPEG; |
| break; |
| } |
| |
| fp->channels = 1; |
| |
| switch (protocol) { |
| case UAC_VERSION_1: { |
| struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; |
| brate = le16_to_cpu(fmt->wMaxBitRate); |
| framesize = le16_to_cpu(fmt->wSamplesPerFrame); |
| snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); |
| fp->frame_size = framesize; |
| ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ |
| break; |
| } |
| case UAC_VERSION_2: { |
| struct uac_format_type_ii_ext_descriptor *fmt = _fmt; |
| brate = le16_to_cpu(fmt->wMaxBitRate); |
| framesize = le16_to_cpu(fmt->wSamplesPerFrame); |
| snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); |
| fp->frame_size = framesize; |
| ret = parse_audio_format_rates_v2(chip, fp, iface); |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| |
| int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp, |
| int format, unsigned char *fmt, int stream, |
| struct usb_host_interface *iface) |
| { |
| int err; |
| |
| switch (fmt[3]) { |
| case UAC_FORMAT_TYPE_I: |
| case UAC_FORMAT_TYPE_III: |
| err = parse_audio_format_i(chip, fp, format, fmt, iface); |
| break; |
| case UAC_FORMAT_TYPE_II: |
| err = parse_audio_format_ii(chip, fp, format, fmt, iface); |
| break; |
| default: |
| snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n", |
| chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]); |
| return -1; |
| } |
| fp->fmt_type = fmt[3]; |
| if (err < 0) |
| return err; |
| #if 1 |
| /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ |
| /* extigy apparently supports sample rates other than 48k |
| * but not in ordinary way. so we enable only 48k atm. |
| */ |
| if (chip->usb_id == USB_ID(0x041e, 0x3000) || |
| chip->usb_id == USB_ID(0x041e, 0x3020) || |
| chip->usb_id == USB_ID(0x041e, 0x3061)) { |
| if (fmt[3] == UAC_FORMAT_TYPE_I && |
| fp->rates != SNDRV_PCM_RATE_48000 && |
| fp->rates != SNDRV_PCM_RATE_96000) |
| return -1; |
| } |
| #endif |
| return 0; |
| } |
| |