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![Takashi Sakamoto](/assets/img/avatar_default.png)
All assignment for local variables in these functions are not related to critical section. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
1021 lines
25 KiB
C
1021 lines
25 KiB
C
/*
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* bebob_stream.c - a part of driver for BeBoB based devices
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*
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* Copyright (c) 2013-2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "./bebob.h"
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#define CALLBACK_TIMEOUT 1000
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#define FW_ISO_RESOURCE_DELAY 1000
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/*
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* NOTE;
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* For BeBoB streams, Both of input and output CMP connection are important.
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*
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* For most devices, each CMP connection starts to transmit/receive a
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* corresponding stream. But for a few devices, both of CMP connection needs
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* to start transmitting stream. An example is 'M-Audio Firewire 410'.
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*/
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/* 128 is an arbitrary length but it seems to be enough */
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#define FORMAT_MAXIMUM_LENGTH 128
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const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES] = {
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[0] = 32000,
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[1] = 44100,
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[2] = 48000,
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[3] = 88200,
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[4] = 96000,
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[5] = 176400,
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[6] = 192000,
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};
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/*
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* See: Table 51: Extended Stream Format Info ‘Sampling Frequency’
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* in Additional AVC commands (Nov 2003, BridgeCo)
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*/
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static const unsigned int bridgeco_freq_table[] = {
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[0] = 0x02,
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[1] = 0x03,
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[2] = 0x04,
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[3] = 0x0a,
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[4] = 0x05,
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[5] = 0x06,
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[6] = 0x07,
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};
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static unsigned int
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get_formation_index(unsigned int rate)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) {
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if (snd_bebob_rate_table[i] == rate)
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return i;
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}
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return -EINVAL;
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}
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int
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snd_bebob_stream_get_rate(struct snd_bebob *bebob, unsigned int *curr_rate)
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{
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unsigned int tx_rate, rx_rate, trials;
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int err;
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trials = 0;
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do {
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err = avc_general_get_sig_fmt(bebob->unit, &tx_rate,
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AVC_GENERAL_PLUG_DIR_OUT, 0);
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} while (err == -EAGAIN && ++trials < 3);
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if (err < 0)
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goto end;
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trials = 0;
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do {
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err = avc_general_get_sig_fmt(bebob->unit, &rx_rate,
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AVC_GENERAL_PLUG_DIR_IN, 0);
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} while (err == -EAGAIN && ++trials < 3);
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if (err < 0)
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goto end;
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*curr_rate = rx_rate;
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if (rx_rate == tx_rate)
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goto end;
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/* synchronize receive stream rate to transmit stream rate */
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err = avc_general_set_sig_fmt(bebob->unit, rx_rate,
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AVC_GENERAL_PLUG_DIR_IN, 0);
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end:
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return err;
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}
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int
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snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate)
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{
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int err;
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err = avc_general_set_sig_fmt(bebob->unit, rate,
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AVC_GENERAL_PLUG_DIR_OUT, 0);
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if (err < 0)
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goto end;
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err = avc_general_set_sig_fmt(bebob->unit, rate,
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AVC_GENERAL_PLUG_DIR_IN, 0);
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if (err < 0)
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goto end;
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/*
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* Some devices need a bit time for transition.
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* 300msec is got by some experiments.
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*/
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msleep(300);
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end:
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return err;
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}
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int
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snd_bebob_stream_check_internal_clock(struct snd_bebob *bebob, bool *internal)
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{
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struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
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u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7];
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unsigned int id;
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int err = 0;
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*internal = false;
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/* 1.The device has its own operation to switch source of clock */
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if (clk_spec) {
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err = clk_spec->get(bebob, &id);
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if (err < 0)
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dev_err(&bebob->unit->device,
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"fail to get clock source: %d\n", err);
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else if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL,
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strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0)
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*internal = true;
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goto end;
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}
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/*
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* 2.The device don't support to switch source of clock then assumed
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* to use internal clock always
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*/
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if (bebob->sync_input_plug < 0) {
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*internal = true;
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goto end;
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}
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/*
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* 3.The device supports to switch source of clock by an usual way.
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* Let's check input for 'Music Sub Unit Sync Input' plug.
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*/
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avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
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bebob->sync_input_plug);
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err = avc_bridgeco_get_plug_input(bebob->unit, addr, input);
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if (err < 0) {
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dev_err(&bebob->unit->device,
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"fail to get an input for MSU in plug %d: %d\n",
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bebob->sync_input_plug, err);
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goto end;
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}
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/*
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* If there are no input plugs, all of fields are 0xff.
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* Here check the first field. This field is used for direction.
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*/
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if (input[0] == 0xff) {
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*internal = true;
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goto end;
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}
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/*
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* If source of clock is internal CSR, Music Sub Unit Sync Input is
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* a destination of Music Sub Unit Sync Output.
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*/
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*internal = ((input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) &&
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(input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT) &&
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(input[2] == 0x0c) &&
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(input[3] == 0x00));
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end:
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return err;
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}
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static unsigned int
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map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s)
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{
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unsigned int sec, sections, ch, channels;
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unsigned int pcm, midi, location;
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unsigned int stm_pos, sec_loc, pos;
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u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type;
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enum avc_bridgeco_plug_dir dir;
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int err;
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/*
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* The length of return value of this command cannot be expected. Here
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* use the maximum length of FCP.
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*/
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buf = kzalloc(256, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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if (s == &bebob->tx_stream)
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dir = AVC_BRIDGECO_PLUG_DIR_OUT;
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else
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dir = AVC_BRIDGECO_PLUG_DIR_IN;
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avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
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err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256);
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if (err < 0) {
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dev_err(&bebob->unit->device,
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"fail to get channel position for isoc %s plug 0: %d\n",
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(dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out",
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err);
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goto end;
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}
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pos = 0;
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/* positions in I/O buffer */
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pcm = 0;
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midi = 0;
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/* the number of sections in AMDTP packet */
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sections = buf[pos++];
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for (sec = 0; sec < sections; sec++) {
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/* type of this section */
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avc_bridgeco_fill_unit_addr(addr, dir,
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AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
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err = avc_bridgeco_get_plug_section_type(bebob->unit, addr,
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sec, &type);
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if (err < 0) {
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dev_err(&bebob->unit->device,
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"fail to get section type for isoc %s plug 0: %d\n",
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(dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
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"out",
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err);
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goto end;
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}
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/* NoType */
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if (type == 0xff) {
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err = -ENOSYS;
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goto end;
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}
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/* the number of channels in this section */
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channels = buf[pos++];
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for (ch = 0; ch < channels; ch++) {
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/* position of this channel in AMDTP packet */
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stm_pos = buf[pos++] - 1;
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/* location of this channel in this section */
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sec_loc = buf[pos++] - 1;
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/*
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* Basically the number of location is within the
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* number of channels in this section. But some models
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* of M-Audio don't follow this. Its location for MIDI
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* is the position of MIDI channels in AMDTP packet.
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*/
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if (sec_loc >= channels)
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sec_loc = ch;
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switch (type) {
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/* for MIDI conformant data channel */
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case 0x0a:
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/* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */
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if ((midi > 0) && (stm_pos != midi)) {
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err = -ENOSYS;
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goto end;
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}
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s->midi_position = stm_pos;
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midi = stm_pos;
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break;
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/* for PCM data channel */
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case 0x01: /* Headphone */
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case 0x02: /* Microphone */
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case 0x03: /* Line */
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case 0x04: /* SPDIF */
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case 0x05: /* ADAT */
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case 0x06: /* TDIF */
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case 0x07: /* MADI */
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/* for undefined/changeable signal */
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case 0x08: /* Analog */
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case 0x09: /* Digital */
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default:
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location = pcm + sec_loc;
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if (location >= AMDTP_MAX_CHANNELS_FOR_PCM) {
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err = -ENOSYS;
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goto end;
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}
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s->pcm_positions[location] = stm_pos;
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break;
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}
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}
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if (type != 0x0a)
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pcm += channels;
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else
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midi += channels;
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}
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end:
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kfree(buf);
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return err;
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}
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static int
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init_both_connections(struct snd_bebob *bebob)
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{
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int err;
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err = cmp_connection_init(&bebob->in_conn,
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bebob->unit, CMP_INPUT, 0);
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if (err < 0)
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goto end;
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err = cmp_connection_init(&bebob->out_conn,
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bebob->unit, CMP_OUTPUT, 0);
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if (err < 0)
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cmp_connection_destroy(&bebob->in_conn);
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end:
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return err;
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}
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static int
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check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s)
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{
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struct cmp_connection *conn;
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bool used;
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int err;
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if (s == &bebob->tx_stream)
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conn = &bebob->out_conn;
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else
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conn = &bebob->in_conn;
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err = cmp_connection_check_used(conn, &used);
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if ((err >= 0) && used && !amdtp_stream_running(s)) {
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dev_err(&bebob->unit->device,
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"Connection established by others: %cPCR[%d]\n",
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(conn->direction == CMP_OUTPUT) ? 'o' : 'i',
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conn->pcr_index);
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err = -EBUSY;
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}
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return err;
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}
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static int
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make_both_connections(struct snd_bebob *bebob, unsigned int rate)
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{
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int index, pcm_channels, midi_channels, err = 0;
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if (bebob->connected)
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goto end;
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/* confirm params for both streams */
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index = get_formation_index(rate);
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pcm_channels = bebob->tx_stream_formations[index].pcm;
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midi_channels = bebob->tx_stream_formations[index].midi;
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amdtp_stream_set_parameters(&bebob->tx_stream,
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rate, pcm_channels, midi_channels * 8);
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pcm_channels = bebob->rx_stream_formations[index].pcm;
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midi_channels = bebob->rx_stream_formations[index].midi;
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amdtp_stream_set_parameters(&bebob->rx_stream,
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rate, pcm_channels, midi_channels * 8);
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/* establish connections for both streams */
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err = cmp_connection_establish(&bebob->out_conn,
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amdtp_stream_get_max_payload(&bebob->tx_stream));
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if (err < 0)
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goto end;
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err = cmp_connection_establish(&bebob->in_conn,
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amdtp_stream_get_max_payload(&bebob->rx_stream));
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if (err < 0) {
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cmp_connection_break(&bebob->out_conn);
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goto end;
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}
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bebob->connected = true;
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end:
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return err;
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}
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static void
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break_both_connections(struct snd_bebob *bebob)
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{
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cmp_connection_break(&bebob->in_conn);
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cmp_connection_break(&bebob->out_conn);
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bebob->connected = false;
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/* These models seems to be in transition state for a longer time. */
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if (bebob->maudio_special_quirk != NULL)
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msleep(200);
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}
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static void
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destroy_both_connections(struct snd_bebob *bebob)
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{
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break_both_connections(bebob);
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cmp_connection_destroy(&bebob->in_conn);
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cmp_connection_destroy(&bebob->out_conn);
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}
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static int
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get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode)
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{
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/* currently this module doesn't support SYT-Match mode */
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*sync_mode = CIP_SYNC_TO_DEVICE;
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return 0;
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}
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static int
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start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream,
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unsigned int rate)
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{
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struct cmp_connection *conn;
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int err = 0;
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if (stream == &bebob->rx_stream)
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conn = &bebob->in_conn;
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else
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conn = &bebob->out_conn;
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/* channel mapping */
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if (bebob->maudio_special_quirk == NULL) {
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err = map_data_channels(bebob, stream);
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if (err < 0)
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goto end;
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}
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/* start amdtp stream */
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err = amdtp_stream_start(stream,
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conn->resources.channel,
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conn->speed);
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end:
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return err;
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}
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int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
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{
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int err;
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err = init_both_connections(bebob);
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if (err < 0)
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goto end;
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err = amdtp_stream_init(&bebob->tx_stream, bebob->unit,
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AMDTP_IN_STREAM, CIP_BLOCKING);
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if (err < 0) {
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amdtp_stream_destroy(&bebob->tx_stream);
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destroy_both_connections(bebob);
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goto end;
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}
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/* See comments in next function */
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init_completion(&bebob->bus_reset);
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bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK;
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/*
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* At high sampling rate, M-Audio special firmware transmits empty
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* packet with the value of dbc incremented by 8 but the others are
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* valid to IEC 61883-1.
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*/
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if (bebob->maudio_special_quirk)
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bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
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err = amdtp_stream_init(&bebob->rx_stream, bebob->unit,
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AMDTP_OUT_STREAM, CIP_BLOCKING);
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if (err < 0) {
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amdtp_stream_destroy(&bebob->tx_stream);
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amdtp_stream_destroy(&bebob->rx_stream);
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destroy_both_connections(bebob);
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}
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/*
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* The firmware for these devices ignore MIDI messages in more than
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* first 8 data blocks of an received AMDTP packet.
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*/
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if (bebob->spec == &maudio_fw410_spec ||
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bebob->spec == &maudio_special_spec)
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bebob->rx_stream.rx_blocks_for_midi = 8;
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end:
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return err;
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}
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int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
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{
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struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
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struct amdtp_stream *master, *slave;
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atomic_t *slave_substreams;
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enum cip_flags sync_mode;
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unsigned int curr_rate;
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bool updated = false;
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int err = 0;
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/*
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* Normal BeBoB firmware has a quirk at bus reset to transmits packets
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* with discontinuous value in dbc field.
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*
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* This 'struct completion' is used to call .update() at first to update
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* connections/streams. Next following codes handle streaming error.
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*/
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if (amdtp_streaming_error(&bebob->tx_stream)) {
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if (completion_done(&bebob->bus_reset))
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reinit_completion(&bebob->bus_reset);
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updated = (wait_for_completion_interruptible_timeout(
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&bebob->bus_reset,
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msecs_to_jiffies(FW_ISO_RESOURCE_DELAY)) > 0);
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}
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mutex_lock(&bebob->mutex);
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/* Need no substreams */
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if (atomic_read(&bebob->playback_substreams) == 0 &&
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atomic_read(&bebob->capture_substreams) == 0)
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goto end;
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||
err = get_sync_mode(bebob, &sync_mode);
|
||
if (err < 0)
|
||
goto end;
|
||
if (sync_mode == CIP_SYNC_TO_DEVICE) {
|
||
master = &bebob->tx_stream;
|
||
slave = &bebob->rx_stream;
|
||
slave_substreams = &bebob->playback_substreams;
|
||
} else {
|
||
master = &bebob->rx_stream;
|
||
slave = &bebob->tx_stream;
|
||
slave_substreams = &bebob->capture_substreams;
|
||
}
|
||
|
||
/*
|
||
* Considering JACK/FFADO streaming:
|
||
* TODO: This can be removed hwdep functionality becomes popular.
|
||
*/
|
||
err = check_connection_used_by_others(bebob, master);
|
||
if (err < 0)
|
||
goto end;
|
||
|
||
/*
|
||
* packet queueing error or detecting discontinuity
|
||
*
|
||
* At bus reset, connections should not be broken here. So streams need
|
||
* to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
|
||
*/
|
||
if (amdtp_streaming_error(master))
|
||
amdtp_stream_stop(master);
|
||
if (amdtp_streaming_error(slave))
|
||
amdtp_stream_stop(slave);
|
||
if (!updated &&
|
||
!amdtp_stream_running(master) && !amdtp_stream_running(slave))
|
||
break_both_connections(bebob);
|
||
|
||
/* stop streams if rate is different */
|
||
err = rate_spec->get(bebob, &curr_rate);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get sampling rate: %d\n", err);
|
||
goto end;
|
||
}
|
||
if (rate == 0)
|
||
rate = curr_rate;
|
||
if (rate != curr_rate) {
|
||
amdtp_stream_stop(master);
|
||
amdtp_stream_stop(slave);
|
||
break_both_connections(bebob);
|
||
}
|
||
|
||
/* master should be always running */
|
||
if (!amdtp_stream_running(master)) {
|
||
amdtp_stream_set_sync(sync_mode, master, slave);
|
||
bebob->master = master;
|
||
|
||
/*
|
||
* NOTE:
|
||
* If establishing connections at first, Yamaha GO46
|
||
* (and maybe Terratec X24) don't generate sound.
|
||
*
|
||
* For firmware customized by M-Audio, refer to next NOTE.
|
||
*/
|
||
if (bebob->maudio_special_quirk == NULL) {
|
||
err = rate_spec->set(bebob, rate);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to set sampling rate: %d\n",
|
||
err);
|
||
goto end;
|
||
}
|
||
}
|
||
|
||
err = make_both_connections(bebob, rate);
|
||
if (err < 0)
|
||
goto end;
|
||
|
||
err = start_stream(bebob, master, rate);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to run AMDTP master stream:%d\n", err);
|
||
break_both_connections(bebob);
|
||
goto end;
|
||
}
|
||
|
||
/*
|
||
* NOTE:
|
||
* The firmware customized by M-Audio uses these commands to
|
||
* start transmitting stream. This is not usual way.
|
||
*/
|
||
if (bebob->maudio_special_quirk != NULL) {
|
||
err = rate_spec->set(bebob, rate);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to ensure sampling rate: %d\n",
|
||
err);
|
||
amdtp_stream_stop(master);
|
||
break_both_connections(bebob);
|
||
goto end;
|
||
}
|
||
}
|
||
|
||
/* wait first callback */
|
||
if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) {
|
||
amdtp_stream_stop(master);
|
||
break_both_connections(bebob);
|
||
err = -ETIMEDOUT;
|
||
goto end;
|
||
}
|
||
}
|
||
|
||
/* start slave if needed */
|
||
if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) {
|
||
err = start_stream(bebob, slave, rate);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to run AMDTP slave stream:%d\n", err);
|
||
amdtp_stream_stop(master);
|
||
break_both_connections(bebob);
|
||
goto end;
|
||
}
|
||
|
||
/* wait first callback */
|
||
if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) {
|
||
amdtp_stream_stop(slave);
|
||
amdtp_stream_stop(master);
|
||
break_both_connections(bebob);
|
||
err = -ETIMEDOUT;
|
||
}
|
||
}
|
||
end:
|
||
mutex_unlock(&bebob->mutex);
|
||
return err;
|
||
}
|
||
|
||
void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
|
||
{
|
||
struct amdtp_stream *master, *slave;
|
||
atomic_t *master_substreams, *slave_substreams;
|
||
|
||
if (bebob->master == &bebob->rx_stream) {
|
||
slave = &bebob->tx_stream;
|
||
master = &bebob->rx_stream;
|
||
slave_substreams = &bebob->capture_substreams;
|
||
master_substreams = &bebob->playback_substreams;
|
||
} else {
|
||
slave = &bebob->rx_stream;
|
||
master = &bebob->tx_stream;
|
||
slave_substreams = &bebob->playback_substreams;
|
||
master_substreams = &bebob->capture_substreams;
|
||
}
|
||
|
||
mutex_lock(&bebob->mutex);
|
||
|
||
if (atomic_read(slave_substreams) == 0) {
|
||
amdtp_stream_pcm_abort(slave);
|
||
amdtp_stream_stop(slave);
|
||
|
||
if (atomic_read(master_substreams) == 0) {
|
||
amdtp_stream_pcm_abort(master);
|
||
amdtp_stream_stop(master);
|
||
break_both_connections(bebob);
|
||
}
|
||
}
|
||
|
||
mutex_unlock(&bebob->mutex);
|
||
}
|
||
|
||
void snd_bebob_stream_update_duplex(struct snd_bebob *bebob)
|
||
{
|
||
/* vs. XRUN recovery due to discontinuity at bus reset */
|
||
mutex_lock(&bebob->mutex);
|
||
|
||
if ((cmp_connection_update(&bebob->in_conn) < 0) ||
|
||
(cmp_connection_update(&bebob->out_conn) < 0)) {
|
||
amdtp_stream_pcm_abort(&bebob->rx_stream);
|
||
amdtp_stream_pcm_abort(&bebob->tx_stream);
|
||
amdtp_stream_stop(&bebob->rx_stream);
|
||
amdtp_stream_stop(&bebob->tx_stream);
|
||
break_both_connections(bebob);
|
||
} else {
|
||
amdtp_stream_update(&bebob->rx_stream);
|
||
amdtp_stream_update(&bebob->tx_stream);
|
||
}
|
||
|
||
/* wake up stream_start_duplex() */
|
||
if (!completion_done(&bebob->bus_reset))
|
||
complete_all(&bebob->bus_reset);
|
||
|
||
mutex_unlock(&bebob->mutex);
|
||
}
|
||
|
||
void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
|
||
{
|
||
mutex_lock(&bebob->mutex);
|
||
|
||
amdtp_stream_pcm_abort(&bebob->rx_stream);
|
||
amdtp_stream_pcm_abort(&bebob->tx_stream);
|
||
|
||
amdtp_stream_stop(&bebob->rx_stream);
|
||
amdtp_stream_stop(&bebob->tx_stream);
|
||
|
||
amdtp_stream_destroy(&bebob->rx_stream);
|
||
amdtp_stream_destroy(&bebob->tx_stream);
|
||
|
||
destroy_both_connections(bebob);
|
||
|
||
mutex_unlock(&bebob->mutex);
|
||
}
|
||
|
||
/*
|
||
* See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
|
||
* in Additional AVC commands (Nov 2003, BridgeCo)
|
||
* Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
|
||
*/
|
||
static int
|
||
parse_stream_formation(u8 *buf, unsigned int len,
|
||
struct snd_bebob_stream_formation *formation)
|
||
{
|
||
unsigned int i, e, channels, format;
|
||
|
||
/*
|
||
* this module can support a hierarchy combination that:
|
||
* Root: Audio and Music (0x90)
|
||
* Level 1: AM824 Compound (0x40)
|
||
*/
|
||
if ((buf[0] != 0x90) || (buf[1] != 0x40))
|
||
return -ENOSYS;
|
||
|
||
/* check sampling rate */
|
||
for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) {
|
||
if (buf[2] == bridgeco_freq_table[i])
|
||
break;
|
||
}
|
||
if (i == ARRAY_SIZE(bridgeco_freq_table))
|
||
return -ENOSYS;
|
||
|
||
/* Avoid double count by different entries for the same rate. */
|
||
memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation));
|
||
|
||
for (e = 0; e < buf[4]; e++) {
|
||
channels = buf[5 + e * 2];
|
||
format = buf[6 + e * 2];
|
||
|
||
switch (format) {
|
||
/* IEC 60958 Conformant, currently handled as MBLA */
|
||
case 0x00:
|
||
/* Multi bit linear audio */
|
||
case 0x06: /* Raw */
|
||
formation[i].pcm += channels;
|
||
break;
|
||
/* MIDI Conformant */
|
||
case 0x0d:
|
||
formation[i].midi += channels;
|
||
break;
|
||
/* IEC 61937-3 to 7 */
|
||
case 0x01:
|
||
case 0x02:
|
||
case 0x03:
|
||
case 0x04:
|
||
case 0x05:
|
||
/* Multi bit linear audio */
|
||
case 0x07: /* DVD-Audio */
|
||
case 0x0c: /* High Precision */
|
||
/* One Bit Audio */
|
||
case 0x08: /* (Plain) Raw */
|
||
case 0x09: /* (Plain) SACD */
|
||
case 0x0a: /* (Encoded) Raw */
|
||
case 0x0b: /* (Encoded) SACD */
|
||
/* Synchronization Stream (Stereo Raw audio) */
|
||
case 0x40:
|
||
/* Don't care */
|
||
case 0xff:
|
||
default:
|
||
return -ENOSYS; /* not supported */
|
||
}
|
||
}
|
||
|
||
if (formation[i].pcm > AMDTP_MAX_CHANNELS_FOR_PCM ||
|
||
formation[i].midi > AMDTP_MAX_CHANNELS_FOR_MIDI)
|
||
return -ENOSYS;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir,
|
||
unsigned short pid)
|
||
{
|
||
u8 *buf;
|
||
struct snd_bebob_stream_formation *formations;
|
||
unsigned int len, eid;
|
||
u8 addr[AVC_BRIDGECO_ADDR_BYTES];
|
||
int err;
|
||
|
||
buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL);
|
||
if (buf == NULL)
|
||
return -ENOMEM;
|
||
|
||
if (dir == AVC_BRIDGECO_PLUG_DIR_IN)
|
||
formations = bebob->rx_stream_formations;
|
||
else
|
||
formations = bebob->tx_stream_formations;
|
||
|
||
for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) {
|
||
len = FORMAT_MAXIMUM_LENGTH;
|
||
avc_bridgeco_fill_unit_addr(addr, dir,
|
||
AVC_BRIDGECO_PLUG_UNIT_ISOC, pid);
|
||
err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf,
|
||
&len, eid);
|
||
/* No entries remained. */
|
||
if (err == -EINVAL && eid > 0) {
|
||
err = 0;
|
||
break;
|
||
} else if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get stream format %d for isoc %s plug %d:%d\n",
|
||
eid,
|
||
(dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
|
||
"out",
|
||
pid, err);
|
||
break;
|
||
}
|
||
|
||
err = parse_stream_formation(buf, len, formations);
|
||
if (err < 0)
|
||
break;
|
||
}
|
||
|
||
kfree(buf);
|
||
return err;
|
||
}
|
||
|
||
static int
|
||
seek_msu_sync_input_plug(struct snd_bebob *bebob)
|
||
{
|
||
u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
|
||
unsigned int i;
|
||
enum avc_bridgeco_plug_type type;
|
||
int err;
|
||
|
||
/* Get the number of Music Sub Unit for both direction. */
|
||
err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get info for MSU in/out plugs: %d\n",
|
||
err);
|
||
goto end;
|
||
}
|
||
|
||
/* seek destination plugs for 'MSU sync input' */
|
||
bebob->sync_input_plug = -1;
|
||
for (i = 0; i < plugs[0]; i++) {
|
||
avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i);
|
||
err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get type for MSU in plug %d: %d\n",
|
||
i, err);
|
||
goto end;
|
||
}
|
||
|
||
if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
|
||
bebob->sync_input_plug = i;
|
||
break;
|
||
}
|
||
}
|
||
end:
|
||
return err;
|
||
}
|
||
|
||
int snd_bebob_stream_discover(struct snd_bebob *bebob)
|
||
{
|
||
struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
|
||
u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
|
||
enum avc_bridgeco_plug_type type;
|
||
unsigned int i;
|
||
int err;
|
||
|
||
/* the number of plugs for isoc in/out, ext in/out */
|
||
err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get info for isoc/external in/out plugs: %d\n",
|
||
err);
|
||
goto end;
|
||
}
|
||
|
||
/*
|
||
* This module supports at least one isoc input plug and one isoc
|
||
* output plug.
|
||
*/
|
||
if ((plugs[0] == 0) || (plugs[1] == 0)) {
|
||
err = -ENOSYS;
|
||
goto end;
|
||
}
|
||
|
||
avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
|
||
AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
|
||
err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get type for isoc in plug 0: %d\n", err);
|
||
goto end;
|
||
} else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
|
||
err = -ENOSYS;
|
||
goto end;
|
||
}
|
||
err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0);
|
||
if (err < 0)
|
||
goto end;
|
||
|
||
avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
|
||
AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
|
||
err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get type for isoc out plug 0: %d\n", err);
|
||
goto end;
|
||
} else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
|
||
err = -ENOSYS;
|
||
goto end;
|
||
}
|
||
err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0);
|
||
if (err < 0)
|
||
goto end;
|
||
|
||
/* count external input plugs for MIDI */
|
||
bebob->midi_input_ports = 0;
|
||
for (i = 0; i < plugs[2]; i++) {
|
||
avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
|
||
AVC_BRIDGECO_PLUG_UNIT_EXT, i);
|
||
err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get type for external in plug %d: %d\n",
|
||
i, err);
|
||
goto end;
|
||
} else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
|
||
bebob->midi_input_ports++;
|
||
}
|
||
}
|
||
|
||
/* count external output plugs for MIDI */
|
||
bebob->midi_output_ports = 0;
|
||
for (i = 0; i < plugs[3]; i++) {
|
||
avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
|
||
AVC_BRIDGECO_PLUG_UNIT_EXT, i);
|
||
err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
|
||
if (err < 0) {
|
||
dev_err(&bebob->unit->device,
|
||
"fail to get type for external out plug %d: %d\n",
|
||
i, err);
|
||
goto end;
|
||
} else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
|
||
bebob->midi_output_ports++;
|
||
}
|
||
}
|
||
|
||
/* for check source of clock later */
|
||
if (!clk_spec)
|
||
err = seek_msu_sync_input_plug(bebob);
|
||
end:
|
||
return err;
|
||
}
|
||
|
||
void snd_bebob_stream_lock_changed(struct snd_bebob *bebob)
|
||
{
|
||
bebob->dev_lock_changed = true;
|
||
wake_up(&bebob->hwdep_wait);
|
||
}
|
||
|
||
int snd_bebob_stream_lock_try(struct snd_bebob *bebob)
|
||
{
|
||
int err;
|
||
|
||
spin_lock_irq(&bebob->lock);
|
||
|
||
/* user land lock this */
|
||
if (bebob->dev_lock_count < 0) {
|
||
err = -EBUSY;
|
||
goto end;
|
||
}
|
||
|
||
/* this is the first time */
|
||
if (bebob->dev_lock_count++ == 0)
|
||
snd_bebob_stream_lock_changed(bebob);
|
||
err = 0;
|
||
end:
|
||
spin_unlock_irq(&bebob->lock);
|
||
return err;
|
||
}
|
||
|
||
void snd_bebob_stream_lock_release(struct snd_bebob *bebob)
|
||
{
|
||
spin_lock_irq(&bebob->lock);
|
||
|
||
if (WARN_ON(bebob->dev_lock_count <= 0))
|
||
goto end;
|
||
if (--bebob->dev_lock_count == 0)
|
||
snd_bebob_stream_lock_changed(bebob);
|
||
end:
|
||
spin_unlock_irq(&bebob->lock);
|
||
}
|