Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *  Creative Audio MIDI, for the CA0106 Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Version: 0.0.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  Changelog:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *    Implementation is based on mpu401 and emu10k1x and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *    tested with ca0106.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *    mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *    emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <sound/rawmidi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "ca_midi.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define ca_midi_write_data(midi, data)	midi->write(midi, data, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define ca_midi_write_cmd(midi, data)	midi->write(midi, data, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define ca_midi_read_data(midi)		midi->read(midi, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define ca_midi_read_stat(midi)		midi->read(midi, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define ca_midi_input_avail(midi)	(!(ca_midi_read_stat(midi) & midi->input_avail))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define ca_midi_output_ready(midi)	(!(ca_midi_read_stat(midi) & midi->output_ready))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static void ca_midi_clear_rx(struct snd_ca_midi *midi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	int timeout = 100000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		ca_midi_read_data(midi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #ifdef CONFIG_SND_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	if (timeout <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		pr_err("ca_midi_clear_rx: timeout (status = 0x%x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 			   ca_midi_read_stat(midi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	unsigned char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (midi->rmidi == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	spin_lock(&midi->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			ca_midi_clear_rx(midi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			byte = ca_midi_read_data(midi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 			if(midi->substream_input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 				snd_rawmidi_receive(midi->substream_input, &byte, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	spin_unlock(&midi->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	spin_lock(&midi->output_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		if (midi->substream_output &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		    snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			ca_midi_write_data(midi, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			midi->interrupt_disable(midi,midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	spin_unlock(&midi->output_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	int timeout, ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	spin_lock_irqsave(&midi->input_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	ca_midi_write_data(midi, 0x00);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	/* ca_midi_clear_rx(midi); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	ca_midi_write_cmd(midi, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (ack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		ok = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		timeout = 10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		while (!ok && timeout-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			if (ca_midi_input_avail(midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 				if (ca_midi_read_data(midi) == midi->ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 					ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (!ok && ca_midi_read_data(midi) == midi->ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	spin_unlock_irqrestore(&midi->input_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	if (!ok)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		pr_err("ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			   cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			   midi->get_dev_id_port(midi->dev_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			   ca_midi_read_stat(midi),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			   ca_midi_read_data(midi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct snd_ca_midi *midi = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (snd_BUG_ON(!midi->dev_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	midi->midi_mode |= CA_MIDI_MODE_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	midi->substream_input = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		ca_midi_cmd(midi, midi->reset, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		ca_midi_cmd(midi, midi->enter_uart, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int ca_midi_output_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	struct snd_ca_midi *midi = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (snd_BUG_ON(!midi->dev_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	midi->substream_output = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		ca_midi_cmd(midi, midi->reset, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		ca_midi_cmd(midi, midi->enter_uart, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct snd_ca_midi *midi = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (snd_BUG_ON(!midi->dev_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	midi->interrupt_disable(midi,midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	midi->substream_input = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		ca_midi_cmd(midi, midi->reset, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct snd_ca_midi *midi = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (snd_BUG_ON(!midi->dev_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	midi->interrupt_disable(midi,midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	midi->substream_output = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		ca_midi_cmd(midi, midi->reset, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct snd_ca_midi *midi = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (snd_BUG_ON(!midi->dev_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		midi->interrupt_enable(midi,midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		midi->interrupt_disable(midi, midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct snd_ca_midi *midi = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (snd_BUG_ON(!midi->dev_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		int max = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		unsigned char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		spin_lock_irqsave(&midi->output_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		/* try to send some amount of bytes here before interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		while (max > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			if (ca_midi_output_ready(midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 				if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 				    snd_rawmidi_transmit(substream, &byte, 1) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 					/* no more data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 					spin_unlock_irqrestore(&midi->output_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 					return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 				ca_midi_write_data(midi, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 				max--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		spin_unlock_irqrestore(&midi->output_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		midi->interrupt_enable(midi,midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		midi->interrupt_disable(midi,midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static const struct snd_rawmidi_ops ca_midi_output =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	.open =		ca_midi_output_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	.close =	ca_midi_output_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	.trigger =	ca_midi_output_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static const struct snd_rawmidi_ops ca_midi_input =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	.open =		ca_midi_input_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	.close =	ca_midi_input_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	.trigger =	ca_midi_input_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static void ca_midi_free(struct snd_ca_midi *midi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	midi->interrupt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	midi->interrupt_enable = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	midi->interrupt_disable = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	midi->read = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	midi->write = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	midi->get_dev_id_card = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	midi->get_dev_id_port = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	midi->rmidi = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) static void ca_rmidi_free(struct snd_rawmidi *rmidi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	ca_midi_free(rmidi->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) int ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	struct snd_rawmidi *rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	midi->dev_id = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	midi->interrupt = ca_midi_interrupt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	spin_lock_init(&midi->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	spin_lock_init(&midi->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	spin_lock_init(&midi->output_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	strcpy(rmidi->name, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	                     SNDRV_RAWMIDI_INFO_INPUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	                     SNDRV_RAWMIDI_INFO_DUPLEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	rmidi->private_data = midi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	rmidi->private_free = ca_rmidi_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	midi->rmidi = rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)