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 the GF1 MIDI interface - like UART 6850
^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/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <sound/gus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) static void snd_gf1_interrupt_midi_in(struct snd_gus_card * gus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	unsigned char stat, byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	__always_unused unsigned char data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	count = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	while (count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 		spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		stat = snd_gf1_uart_stat(gus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		if (!(stat & 0x01)) {	/* data in Rx FIFO? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 			spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 			count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		count = 100;	/* arm counter to new value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		data = snd_gf1_uart_get(gus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		if (!(gus->gf1.uart_cmd & 0x80)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 			spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		}			
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		if (stat & 0x10) {	/* framing error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 			gus->gf1.uart_framing++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 			spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		byte = snd_gf1_uart_get(gus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		snd_rawmidi_receive(gus->midi_substream_input, &byte, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		if (stat & 0x20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 			gus->gf1.uart_overrun++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		}
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static void snd_gf1_interrupt_midi_out(struct snd_gus_card * gus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	/* try unlock output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (snd_gf1_uart_stat(gus) & 0x01)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		snd_gf1_interrupt_midi_in(gus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	if (snd_gf1_uart_stat(gus) & 0x02) {	/* Tx FIFO free? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		if (snd_rawmidi_transmit(gus->midi_substream_output, &byte, 1) != 1) {	/* no other bytes or error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x20); /* disable Tx interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			snd_gf1_uart_put(gus, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static void snd_gf1_uart_reset(struct snd_gus_card * gus, int close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	snd_gf1_uart_cmd(gus, 0x03);	/* reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (!close && gus->uart_enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		udelay(160);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		snd_gf1_uart_cmd(gus, 0x00);	/* normal operations */
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) static int snd_gf1_uart_output_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct snd_gus_card *gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	gus = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (!(gus->gf1.uart_cmd & 0x80)) {	/* input active? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		snd_gf1_uart_reset(gus, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	gus->gf1.interrupt_handler_midi_out = snd_gf1_interrupt_midi_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	gus->midi_substream_output = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	snd_printk(KERN_DEBUG "write init - cmd = 0x%x, stat = 0x%x\n", gus->gf1.uart_cmd, snd_gf1_uart_stat(gus));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static int snd_gf1_uart_input_open(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct snd_gus_card *gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	gus = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (gus->gf1.interrupt_handler_midi_out != snd_gf1_interrupt_midi_out) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		snd_gf1_uart_reset(gus, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	gus->gf1.interrupt_handler_midi_in = snd_gf1_interrupt_midi_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	gus->midi_substream_input = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (gus->uart_enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		for (i = 0; i < 1000 && (snd_gf1_uart_stat(gus) & 0x01); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			snd_gf1_uart_get(gus);	/* clean Rx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		if (i >= 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			snd_printk(KERN_ERR "gus midi uart init read - cleanup error\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	snd_printk(KERN_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		   "read init - enable = %i, cmd = 0x%x, stat = 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		   gus->uart_enable, gus->gf1.uart_cmd, snd_gf1_uart_stat(gus));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	snd_printk(KERN_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		   "[0x%x] reg (ctrl/status) = 0x%x, reg (data) = 0x%x "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		   "(page = 0x%x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		   gus->gf1.port + 0x100, inb(gus->gf1.port + 0x100),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		   inb(gus->gf1.port + 0x101), inb(gus->gf1.port + 0x102));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static int snd_gf1_uart_output_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct snd_gus_card *gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	gus = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (gus->gf1.interrupt_handler_midi_in != snd_gf1_interrupt_midi_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		snd_gf1_uart_reset(gus, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_OUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	gus->midi_substream_output = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static int snd_gf1_uart_input_close(struct snd_rawmidi_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	struct snd_gus_card *gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	gus = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	if (gus->gf1.interrupt_handler_midi_out != snd_gf1_interrupt_midi_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		snd_gf1_uart_reset(gus, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	gus->midi_substream_input = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static void snd_gf1_uart_input_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct snd_gus_card *gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	gus = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		if ((gus->gf1.uart_cmd & 0x80) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd | 0x80); /* enable Rx interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		if (gus->gf1.uart_cmd & 0x80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x80); /* disable Rx interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static void snd_gf1_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct snd_gus_card *gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	char byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	int timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	gus = substream->rmidi->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		if ((gus->gf1.uart_cmd & 0x20) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			/* wait for empty Rx - Tx is probably unlocked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			timeout = 10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			while (timeout-- > 0 && snd_gf1_uart_stat(gus) & 0x01);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			/* Tx FIFO free? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			spin_lock_irqsave(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			if (gus->gf1.uart_cmd & 0x20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 				spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 				return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			if (snd_gf1_uart_stat(gus) & 0x02) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 				if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 					spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 					return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 				snd_gf1_uart_put(gus, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd | 0x20);	/* enable Tx interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		if (gus->gf1.uart_cmd & 0x20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static const struct snd_rawmidi_ops snd_gf1_uart_output =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	.open =		snd_gf1_uart_output_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	.close =	snd_gf1_uart_output_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	.trigger =	snd_gf1_uart_output_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static const struct snd_rawmidi_ops snd_gf1_uart_input =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	.open =		snd_gf1_uart_input_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	.close =	snd_gf1_uart_input_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	.trigger =	snd_gf1_uart_input_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) int snd_gf1_rawmidi_new(struct snd_gus_card *gus, int device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	struct snd_rawmidi *rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	if ((err = snd_rawmidi_new(gus->card, "GF1", device, 1, 1, &rmidi)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	strcpy(rmidi->name, gus->interwave ? "AMD InterWave" : "GF1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_gf1_uart_output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_gf1_uart_input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	rmidi->private_data = gus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	gus->midi_uart = rmidi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }