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 (c) by Jaroslav Kysela <perex@perex.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *  Routines for control of SoundBlaster cards - MIDI interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Sun May  9 22:54:38 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *   Fixed typo in snd_sb8dsp_midi_new_device which prevented midi from 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *   working.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Sun May 11 12:34:56 UTC 2003 Clemens Ladisch <clemens@ladisch.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *   Added full duplex UART mode for DSP version 2.0 and later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <sound/sb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct snd_rawmidi *rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	int max = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (!chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	rmidi = chip->rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (!rmidi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		inb(SBP(chip, DATA_AVAIL));	/* ack interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	spin_lock(&chip->midi_input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	while (max-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 			byte = inb(SBP(chip, READ));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 			if (chip->open & SB_OPEN_MIDI_INPUT_TRIGGER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 				snd_rawmidi_receive(chip->midi_substream_input, &byte, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	spin_unlock(&chip->midi_input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static int snd_sb8dsp_midi_input_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	unsigned int valid_open_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	valid_open_flags = chip->hardware >= SB_HW_20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		? SB_OPEN_MIDI_OUTPUT | SB_OPEN_MIDI_OUTPUT_TRIGGER : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (chip->open & ~valid_open_flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	chip->open |= SB_OPEN_MIDI_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	chip->midi_substream_input = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (!(chip->open & SB_OPEN_MIDI_OUTPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		snd_sbdsp_reset(chip);		/* reset DSP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		if (chip->hardware >= SB_HW_20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			snd_sbdsp_command(chip, SB_DSP_MIDI_UART_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static int snd_sb8dsp_midi_output_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	unsigned int valid_open_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	valid_open_flags = chip->hardware >= SB_HW_20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		? SB_OPEN_MIDI_INPUT | SB_OPEN_MIDI_INPUT_TRIGGER : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	if (chip->open & ~valid_open_flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	chip->open |= SB_OPEN_MIDI_OUTPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	chip->midi_substream_output = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (!(chip->open & SB_OPEN_MIDI_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		snd_sbdsp_reset(chip);		/* reset DSP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		if (chip->hardware >= SB_HW_20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			snd_sbdsp_command(chip, SB_DSP_MIDI_UART_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int snd_sb8dsp_midi_input_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	chip->open &= ~(SB_OPEN_MIDI_INPUT | SB_OPEN_MIDI_INPUT_TRIGGER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	chip->midi_substream_input = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (!(chip->open & SB_OPEN_MIDI_OUTPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		snd_sbdsp_reset(chip);		/* reset DSP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int snd_sb8dsp_midi_output_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	del_timer_sync(&chip->midi_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	chip->open &= ~(SB_OPEN_MIDI_OUTPUT | SB_OPEN_MIDI_OUTPUT_TRIGGER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	chip->midi_substream_output = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (!(chip->open & SB_OPEN_MIDI_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		snd_sbdsp_reset(chip);		/* reset DSP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static void snd_sb8dsp_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		if (!(chip->open & SB_OPEN_MIDI_INPUT_TRIGGER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			if (chip->hardware < SB_HW_20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 				snd_sbdsp_command(chip, SB_DSP_MIDI_INPUT_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			chip->open |= SB_OPEN_MIDI_INPUT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		if (chip->open & SB_OPEN_MIDI_INPUT_TRIGGER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			if (chip->hardware < SB_HW_20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				snd_sbdsp_command(chip, SB_DSP_MIDI_INPUT_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			chip->open &= ~SB_OPEN_MIDI_INPUT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void snd_sb8dsp_midi_output_write(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	int max = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	/* how big is Tx FIFO? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	while (max-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (snd_rawmidi_transmit_peek(substream, &byte, 1) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			chip->open &= ~SB_OPEN_MIDI_OUTPUT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			del_timer(&chip->midi_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		if (chip->hardware >= SB_HW_20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			int timeout = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			while ((inb(SBP(chip, STATUS)) & 0x80) != 0 && --timeout > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 				;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			if (timeout == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 				/* Tx FIFO full - try again later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 				spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			outb(byte, SBP(chip, WRITE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			snd_sbdsp_command(chip, SB_DSP_MIDI_OUTPUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			snd_sbdsp_command(chip, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		snd_rawmidi_transmit_ack(substream, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static void snd_sb8dsp_midi_output_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct snd_sb *chip = from_timer(chip, t, midi_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct snd_rawmidi_substream *substream = chip->midi_substream_output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	mod_timer(&chip->midi_timer, 1 + jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	spin_unlock_irqrestore(&chip->open_lock, flags);	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	snd_sb8dsp_midi_output_write(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static void snd_sb8dsp_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	struct snd_sb *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	chip = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	spin_lock_irqsave(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		if (!(chip->open & SB_OPEN_MIDI_OUTPUT_TRIGGER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			mod_timer(&chip->midi_timer, 1 + jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			chip->open |= SB_OPEN_MIDI_OUTPUT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		if (chip->open & SB_OPEN_MIDI_OUTPUT_TRIGGER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			chip->open &= ~SB_OPEN_MIDI_OUTPUT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	spin_unlock_irqrestore(&chip->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	if (up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		snd_sb8dsp_midi_output_write(substream);
^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) static const struct snd_rawmidi_ops snd_sb8dsp_midi_output =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	.open =		snd_sb8dsp_midi_output_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	.close =	snd_sb8dsp_midi_output_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	.trigger =	snd_sb8dsp_midi_output_trigger,
^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) static const struct snd_rawmidi_ops snd_sb8dsp_midi_input =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	.open =		snd_sb8dsp_midi_input_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	.close =	snd_sb8dsp_midi_input_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	.trigger =	snd_sb8dsp_midi_input_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int snd_sb8dsp_midi(struct snd_sb *chip, int device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct snd_rawmidi *rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	if ((err = snd_rawmidi_new(chip->card, "SB8 MIDI", device, 1, 1, &rmidi)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	strcpy(rmidi->name, "SB8 MIDI");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_sb8dsp_midi_output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_sb8dsp_midi_input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	if (chip->hardware >= SB_HW_20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	rmidi->private_data = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	timer_setup(&chip->midi_timer, snd_sb8dsp_midi_output_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	chip->rmidi = rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }