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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/sound/pci/echoaudio/midi.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/sound/pci/echoaudio/midi.c')
-rw-r--r-- | ANDROID_3.4.5/sound/pci/echoaudio/midi.c | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/ANDROID_3.4.5/sound/pci/echoaudio/midi.c b/ANDROID_3.4.5/sound/pci/echoaudio/midi.c deleted file mode 100644 index a953d142..00000000 --- a/ANDROID_3.4.5/sound/pci/echoaudio/midi.c +++ /dev/null @@ -1,331 +0,0 @@ -/**************************************************************************** - - Copyright Echo Digital Audio Corporation (c) 1998 - 2004 - All rights reserved - www.echoaudio.com - - This file is part of Echo Digital Audio's generic driver library. - - Echo Digital Audio's generic driver library 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. - - 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. - - ************************************************************************* - - Translation from C++ and adaptation for use in ALSA-Driver - were made by Giuliano Pochini <pochini@shiny.it> - -****************************************************************************/ - - -/****************************************************************************** - MIDI lowlevel code -******************************************************************************/ - -/* Start and stop Midi input */ -static int enable_midi_input(struct echoaudio *chip, char enable) -{ - DE_MID(("enable_midi_input(%d)\n", enable)); - - if (wait_handshake(chip)) - return -EIO; - - if (enable) { - chip->mtc_state = MIDI_IN_STATE_NORMAL; - chip->comm_page->flags |= - cpu_to_le32(DSP_FLAG_MIDI_INPUT); - } else - chip->comm_page->flags &= - ~cpu_to_le32(DSP_FLAG_MIDI_INPUT); - - clear_handshake(chip); - return send_vector(chip, DSP_VC_UPDATE_FLAGS); -} - - - -/* Send a buffer full of MIDI data to the DSP -Returns how many actually written or < 0 on error */ -static int write_midi(struct echoaudio *chip, u8 *data, int bytes) -{ - if (snd_BUG_ON(bytes <= 0 || bytes >= MIDI_OUT_BUFFER_SIZE)) - return -EINVAL; - - if (wait_handshake(chip)) - return -EIO; - - /* HF4 indicates that it is safe to write MIDI output data */ - if (! (get_dsp_register(chip, CHI32_STATUS_REG) & CHI32_STATUS_REG_HF4)) - return 0; - - chip->comm_page->midi_output[0] = bytes; - memcpy(&chip->comm_page->midi_output[1], data, bytes); - chip->comm_page->midi_out_free_count = 0; - clear_handshake(chip); - send_vector(chip, DSP_VC_MIDI_WRITE); - DE_MID(("write_midi: %d\n", bytes)); - return bytes; -} - - - -/* Run the state machine for MIDI input data -MIDI time code sync isn't supported by this code right now, but you still need -this state machine to parse the incoming MIDI data stream. Every time the DSP -sees a 0xF1 byte come in, it adds the DSP sample position to the MIDI data -stream. The DSP sample position is represented as a 32 bit unsigned value, -with the high 16 bits first, followed by the low 16 bits. Since these aren't -real MIDI bytes, the following logic is needed to skip them. */ -static inline int mtc_process_data(struct echoaudio *chip, short midi_byte) -{ - switch (chip->mtc_state) { - case MIDI_IN_STATE_NORMAL: - if (midi_byte == 0xF1) - chip->mtc_state = MIDI_IN_STATE_TS_HIGH; - break; - case MIDI_IN_STATE_TS_HIGH: - chip->mtc_state = MIDI_IN_STATE_TS_LOW; - return MIDI_IN_SKIP_DATA; - break; - case MIDI_IN_STATE_TS_LOW: - chip->mtc_state = MIDI_IN_STATE_F1_DATA; - return MIDI_IN_SKIP_DATA; - break; - case MIDI_IN_STATE_F1_DATA: - chip->mtc_state = MIDI_IN_STATE_NORMAL; - break; - } - return 0; -} - - - -/* This function is called from the IRQ handler and it reads the midi data -from the DSP's buffer. It returns the number of bytes received. */ -static int midi_service_irq(struct echoaudio *chip) -{ - short int count, midi_byte, i, received; - - /* The count is at index 0, followed by actual data */ - count = le16_to_cpu(chip->comm_page->midi_input[0]); - - if (snd_BUG_ON(count >= MIDI_IN_BUFFER_SIZE)) - return 0; - - /* Get the MIDI data from the comm page */ - i = 1; - received = 0; - for (i = 1; i <= count; i++) { - /* Get the MIDI byte */ - midi_byte = le16_to_cpu(chip->comm_page->midi_input[i]); - - /* Parse the incoming MIDI stream. The incoming MIDI data - consists of MIDI bytes and timestamps for the MIDI time code - 0xF1 bytes. mtc_process_data() is a little state machine that - parses the stream. If you get MIDI_IN_SKIP_DATA back, then - this is a timestamp byte, not a MIDI byte, so don't store it - in the MIDI input buffer. */ - if (mtc_process_data(chip, midi_byte) == MIDI_IN_SKIP_DATA) - continue; - - chip->midi_buffer[received++] = (u8)midi_byte; - } - - return received; -} - - - - -/****************************************************************************** - MIDI interface -******************************************************************************/ - -static int snd_echo_midi_input_open(struct snd_rawmidi_substream *substream) -{ - struct echoaudio *chip = substream->rmidi->private_data; - - chip->midi_in = substream; - DE_MID(("rawmidi_iopen\n")); - return 0; -} - - - -static void snd_echo_midi_input_trigger(struct snd_rawmidi_substream *substream, - int up) -{ - struct echoaudio *chip = substream->rmidi->private_data; - - if (up != chip->midi_input_enabled) { - spin_lock_irq(&chip->lock); - enable_midi_input(chip, up); - spin_unlock_irq(&chip->lock); - chip->midi_input_enabled = up; - } -} - - - -static int snd_echo_midi_input_close(struct snd_rawmidi_substream *substream) -{ - struct echoaudio *chip = substream->rmidi->private_data; - - chip->midi_in = NULL; - DE_MID(("rawmidi_iclose\n")); - return 0; -} - - - -static int snd_echo_midi_output_open(struct snd_rawmidi_substream *substream) -{ - struct echoaudio *chip = substream->rmidi->private_data; - - chip->tinuse = 0; - chip->midi_full = 0; - chip->midi_out = substream; - DE_MID(("rawmidi_oopen\n")); - return 0; -} - - - -static void snd_echo_midi_output_write(unsigned long data) -{ - struct echoaudio *chip = (struct echoaudio *)data; - unsigned long flags; - int bytes, sent, time; - unsigned char buf[MIDI_OUT_BUFFER_SIZE - 1]; - - DE_MID(("snd_echo_midi_output_write\n")); - /* No interrupts are involved: we have to check at regular intervals - if the card's output buffer has room for new data. */ - sent = bytes = 0; - spin_lock_irqsave(&chip->lock, flags); - chip->midi_full = 0; - if (!snd_rawmidi_transmit_empty(chip->midi_out)) { - bytes = snd_rawmidi_transmit_peek(chip->midi_out, buf, - MIDI_OUT_BUFFER_SIZE - 1); - DE_MID(("Try to send %d bytes...\n", bytes)); - sent = write_midi(chip, buf, bytes); - if (sent < 0) { - snd_printk(KERN_ERR "write_midi() error %d\n", sent); - /* retry later */ - sent = 9000; - chip->midi_full = 1; - } else if (sent > 0) { - DE_MID(("%d bytes sent\n", sent)); - snd_rawmidi_transmit_ack(chip->midi_out, sent); - } else { - /* Buffer is full. DSP's internal buffer is 64 (128 ?) - bytes long. Let's wait until half of them are sent */ - DE_MID(("Full\n")); - sent = 32; - chip->midi_full = 1; - } - } - - /* We restart the timer only if there is some data left to send */ - if (!snd_rawmidi_transmit_empty(chip->midi_out) && chip->tinuse) { - /* The timer will expire slightly after the data has been - sent */ - time = (sent << 3) / 25 + 1; /* 8/25=0.32ms to send a byte */ - mod_timer(&chip->timer, jiffies + (time * HZ + 999) / 1000); - DE_MID(("Timer armed(%d)\n", ((time * HZ + 999) / 1000))); - } - spin_unlock_irqrestore(&chip->lock, flags); -} - - - -static void snd_echo_midi_output_trigger(struct snd_rawmidi_substream *substream, - int up) -{ - struct echoaudio *chip = substream->rmidi->private_data; - - DE_MID(("snd_echo_midi_output_trigger(%d)\n", up)); - spin_lock_irq(&chip->lock); - if (up) { - if (!chip->tinuse) { - init_timer(&chip->timer); - chip->timer.function = snd_echo_midi_output_write; - chip->timer.data = (unsigned long)chip; - chip->tinuse = 1; - } - } else { - if (chip->tinuse) { - chip->tinuse = 0; - spin_unlock_irq(&chip->lock); - del_timer_sync(&chip->timer); - DE_MID(("Timer removed\n")); - return; - } - } - spin_unlock_irq(&chip->lock); - - if (up && !chip->midi_full) - snd_echo_midi_output_write((unsigned long)chip); -} - - - -static int snd_echo_midi_output_close(struct snd_rawmidi_substream *substream) -{ - struct echoaudio *chip = substream->rmidi->private_data; - - chip->midi_out = NULL; - DE_MID(("rawmidi_oclose\n")); - return 0; -} - - - -static struct snd_rawmidi_ops snd_echo_midi_input = { - .open = snd_echo_midi_input_open, - .close = snd_echo_midi_input_close, - .trigger = snd_echo_midi_input_trigger, -}; - -static struct snd_rawmidi_ops snd_echo_midi_output = { - .open = snd_echo_midi_output_open, - .close = snd_echo_midi_output_close, - .trigger = snd_echo_midi_output_trigger, -}; - - - -/* <--snd_echo_probe() */ -static int __devinit snd_echo_midi_create(struct snd_card *card, - struct echoaudio *chip) -{ - int err; - - if ((err = snd_rawmidi_new(card, card->shortname, 0, 1, 1, - &chip->rmidi)) < 0) - return err; - - strcpy(chip->rmidi->name, card->shortname); - chip->rmidi->private_data = chip; - - snd_rawmidi_set_ops(chip->rmidi, SNDRV_RAWMIDI_STREAM_INPUT, - &snd_echo_midi_input); - snd_rawmidi_set_ops(chip->rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, - &snd_echo_midi_output); - - chip->rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | - SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX; - DE_INIT(("MIDI ok\n")); - return 0; -} |