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 EMU10K1 MPU-401 in UART mode
^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) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <sound/emu10k1.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define EMU10K1_MIDI_MODE_INPUT		(1<<0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #define EMU10K1_MIDI_MODE_OUTPUT	(1<<1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 					struct snd_emu10k1_midi *mpu, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	if (emu->audigy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 		return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 		return inb(emu->port + mpu->port + idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) static inline void mpu401_write(struct snd_emu10k1 *emu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 				struct snd_emu10k1_midi *mpu, int data, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	if (emu->audigy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		outb(data, emu->port + mpu->port + idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define mpu401_write_data(emu, mpu, data)	mpu401_write(emu, mpu, data, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define mpu401_write_cmd(emu, mpu, data)	mpu401_write(emu, mpu, data, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define mpu401_read_data(emu, mpu)		mpu401_read(emu, mpu, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define mpu401_read_stat(emu, mpu)		mpu401_read(emu, mpu, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define mpu401_input_avail(emu,mpu)	(!(mpu401_read_stat(emu,mpu) & 0x80))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define mpu401_output_ready(emu,mpu)	(!(mpu401_read_stat(emu,mpu) & 0x40))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define MPU401_RESET		0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define MPU401_ENTER_UART	0x3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define MPU401_ACK		0xfe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static void mpu401_clear_rx(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *mpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	int timeout = 100000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		mpu401_read_data(emu, mpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #ifdef CONFIG_SND_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	if (timeout <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		dev_err(emu->card->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			"cmd: clear rx timeout (status = 0x%x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 			mpu401_read_stat(emu, mpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #endif
^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)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static void do_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, unsigned int status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	unsigned char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (midi->rmidi == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		return;
^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_lock(&midi->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			mpu401_clear_rx(emu, midi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			byte = mpu401_read_data(emu, midi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			if (midi->substream_input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 				snd_rawmidi_receive(midi->substream_input, &byte, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	spin_unlock(&midi->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	spin_lock(&midi->output_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		if (midi->substream_output &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		    snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			mpu401_write_data(emu, midi, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			snd_emu10k1_intr_disable(emu, midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	spin_unlock(&midi->output_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	int timeout, ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	spin_lock_irqsave(&midi->input_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	mpu401_write_data(emu, midi, 0x00);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	/* mpu401_clear_rx(emu, midi); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	mpu401_write_cmd(emu, midi, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (ack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		ok = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		timeout = 10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		while (!ok && timeout-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			if (mpu401_input_avail(emu, midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 				if (mpu401_read_data(emu, midi) == MPU401_ACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 					ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	spin_unlock_irqrestore(&midi->input_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	if (!ok) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		dev_err(emu->card->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			"midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			   cmd, emu->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			   mpu401_read_stat(emu, midi),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			   mpu401_read_data(emu, midi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		return 1;
^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 int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	struct snd_emu10k1 *emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	emu = midi->emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (snd_BUG_ON(!emu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	midi->substream_input = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			goto error_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			goto error_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	} else {
^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) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) error_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	return -EIO;
^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 snd_emu10k1_midi_output_open(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_emu10k1 *emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	emu = midi->emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	if (snd_BUG_ON(!emu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	midi->substream_output = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			goto error_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			goto error_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) error_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	struct snd_emu10k1 *emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	emu = midi->emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (snd_BUG_ON(!emu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	snd_emu10k1_intr_disable(emu, midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	midi->substream_input = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	struct snd_emu10k1 *emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	emu = midi->emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	if (snd_BUG_ON(!emu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	spin_lock_irqsave(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	snd_emu10k1_intr_disable(emu, midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	midi->substream_output = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		spin_unlock_irqrestore(&midi->open_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	struct snd_emu10k1 *emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	emu = midi->emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (snd_BUG_ON(!emu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		snd_emu10k1_intr_enable(emu, midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		snd_emu10k1_intr_disable(emu, midi->rx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct snd_emu10k1 *emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	emu = midi->emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (snd_BUG_ON(!emu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		int max = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		unsigned char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		/* try to send some amount of bytes here before interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		spin_lock_irqsave(&midi->output_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		while (max > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			if (mpu401_output_ready(emu, midi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 				if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 				    snd_rawmidi_transmit(substream, &byte, 1) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 					/* no more data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 					spin_unlock_irqrestore(&midi->output_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 					return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 				mpu401_write_data(emu, midi, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 				max--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		spin_unlock_irqrestore(&midi->output_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		snd_emu10k1_intr_enable(emu, midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		snd_emu10k1_intr_disable(emu, midi->tx_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static const struct snd_rawmidi_ops snd_emu10k1_midi_output =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	.open =		snd_emu10k1_midi_output_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.close =	snd_emu10k1_midi_output_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.trigger =	snd_emu10k1_midi_output_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static const struct snd_rawmidi_ops snd_emu10k1_midi_input =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	.open =		snd_emu10k1_midi_input_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	.close =	snd_emu10k1_midi_input_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	.trigger =	snd_emu10k1_midi_input_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	struct snd_emu10k1_midi *midi = rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	midi->interrupt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	midi->rmidi = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static int emu10k1_midi_init(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, int device, char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	struct snd_rawmidi *rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	midi->emu = emu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	spin_lock_init(&midi->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	spin_lock_init(&midi->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	spin_lock_init(&midi->output_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	strcpy(rmidi->name, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	                     SNDRV_RAWMIDI_INFO_INPUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	                     SNDRV_RAWMIDI_INFO_DUPLEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	rmidi->private_data = midi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	rmidi->private_free = snd_emu10k1_midi_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	midi->rmidi = rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) int snd_emu10k1_midi(struct snd_emu10k1 *emu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	struct snd_emu10k1_midi *midi = &emu->midi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	midi->tx_enable = INTE_MIDITXENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	midi->rx_enable = INTE_MIDIRXENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	midi->port = MUDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	midi->interrupt = snd_emu10k1_midi_interrupt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) int snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	struct snd_emu10k1_midi *midi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	midi = &emu->midi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	midi->tx_enable = INTE_MIDITXENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	midi->rx_enable = INTE_MIDIRXENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	midi->port = A_MUDATA1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	midi->interrupt = snd_emu10k1_midi_interrupt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	midi = &emu->midi2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	midi->tx_enable = INTE_A_MIDITXENABLE2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	midi->rx_enable = INTE_A_MIDIRXENABLE2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	midi->port = A_MUDATA2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	midi->interrupt = snd_emu10k1_midi_interrupt2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }