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Based on 1 normalized pattern(s): this program 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 either version 2 of the license or at your option any later version 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
243 lines
7.1 KiB
C
243 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Routines for the GF1 MIDI interface - like UART 6850
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*/
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/time.h>
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#include <sound/core.h>
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#include <sound/gus.h>
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static void snd_gf1_interrupt_midi_in(struct snd_gus_card * gus)
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{
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int count;
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unsigned char stat, data, byte;
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unsigned long flags;
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count = 10;
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while (count) {
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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stat = snd_gf1_uart_stat(gus);
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if (!(stat & 0x01)) { /* data in Rx FIFO? */
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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count--;
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continue;
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}
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count = 100; /* arm counter to new value */
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data = snd_gf1_uart_get(gus);
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if (!(gus->gf1.uart_cmd & 0x80)) {
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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continue;
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}
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if (stat & 0x10) { /* framing error */
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gus->gf1.uart_framing++;
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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continue;
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}
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byte = snd_gf1_uart_get(gus);
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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snd_rawmidi_receive(gus->midi_substream_input, &byte, 1);
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if (stat & 0x20) {
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gus->gf1.uart_overrun++;
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}
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}
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}
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static void snd_gf1_interrupt_midi_out(struct snd_gus_card * gus)
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{
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char byte;
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unsigned long flags;
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/* try unlock output */
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if (snd_gf1_uart_stat(gus) & 0x01)
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snd_gf1_interrupt_midi_in(gus);
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (snd_gf1_uart_stat(gus) & 0x02) { /* Tx FIFO free? */
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if (snd_rawmidi_transmit(gus->midi_substream_output, &byte, 1) != 1) { /* no other bytes or error */
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snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x20); /* disable Tx interrupt */
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} else {
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snd_gf1_uart_put(gus, byte);
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}
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}
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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}
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static void snd_gf1_uart_reset(struct snd_gus_card * gus, int close)
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{
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snd_gf1_uart_cmd(gus, 0x03); /* reset */
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if (!close && gus->uart_enable) {
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udelay(160);
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snd_gf1_uart_cmd(gus, 0x00); /* normal operations */
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}
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}
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static int snd_gf1_uart_output_open(struct snd_rawmidi_substream *substream)
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{
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unsigned long flags;
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struct snd_gus_card *gus;
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gus = substream->rmidi->private_data;
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (!(gus->gf1.uart_cmd & 0x80)) { /* input active? */
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snd_gf1_uart_reset(gus, 0);
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}
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gus->gf1.interrupt_handler_midi_out = snd_gf1_interrupt_midi_out;
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gus->midi_substream_output = substream;
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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#if 0
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snd_printk(KERN_DEBUG "write init - cmd = 0x%x, stat = 0x%x\n", gus->gf1.uart_cmd, snd_gf1_uart_stat(gus));
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#endif
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return 0;
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}
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static int snd_gf1_uart_input_open(struct snd_rawmidi_substream *substream)
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{
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unsigned long flags;
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struct snd_gus_card *gus;
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int i;
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gus = substream->rmidi->private_data;
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (gus->gf1.interrupt_handler_midi_out != snd_gf1_interrupt_midi_out) {
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snd_gf1_uart_reset(gus, 0);
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}
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gus->gf1.interrupt_handler_midi_in = snd_gf1_interrupt_midi_in;
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gus->midi_substream_input = substream;
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if (gus->uart_enable) {
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for (i = 0; i < 1000 && (snd_gf1_uart_stat(gus) & 0x01); i++)
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snd_gf1_uart_get(gus); /* clean Rx */
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if (i >= 1000)
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snd_printk(KERN_ERR "gus midi uart init read - cleanup error\n");
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}
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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#if 0
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snd_printk(KERN_DEBUG
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"read init - enable = %i, cmd = 0x%x, stat = 0x%x\n",
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gus->uart_enable, gus->gf1.uart_cmd, snd_gf1_uart_stat(gus));
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snd_printk(KERN_DEBUG
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"[0x%x] reg (ctrl/status) = 0x%x, reg (data) = 0x%x "
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"(page = 0x%x)\n",
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gus->gf1.port + 0x100, inb(gus->gf1.port + 0x100),
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inb(gus->gf1.port + 0x101), inb(gus->gf1.port + 0x102));
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#endif
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return 0;
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}
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static int snd_gf1_uart_output_close(struct snd_rawmidi_substream *substream)
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{
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unsigned long flags;
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struct snd_gus_card *gus;
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gus = substream->rmidi->private_data;
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (gus->gf1.interrupt_handler_midi_in != snd_gf1_interrupt_midi_in)
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snd_gf1_uart_reset(gus, 1);
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snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_OUT);
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gus->midi_substream_output = NULL;
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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return 0;
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}
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static int snd_gf1_uart_input_close(struct snd_rawmidi_substream *substream)
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{
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unsigned long flags;
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struct snd_gus_card *gus;
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gus = substream->rmidi->private_data;
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (gus->gf1.interrupt_handler_midi_out != snd_gf1_interrupt_midi_out)
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snd_gf1_uart_reset(gus, 1);
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snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_IN);
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gus->midi_substream_input = NULL;
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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return 0;
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}
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static void snd_gf1_uart_input_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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struct snd_gus_card *gus;
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unsigned long flags;
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gus = substream->rmidi->private_data;
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (up) {
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if ((gus->gf1.uart_cmd & 0x80) == 0)
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snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd | 0x80); /* enable Rx interrupts */
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} else {
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if (gus->gf1.uart_cmd & 0x80)
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snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x80); /* disable Rx interrupts */
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}
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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}
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static void snd_gf1_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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unsigned long flags;
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struct snd_gus_card *gus;
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char byte;
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int timeout;
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gus = substream->rmidi->private_data;
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (up) {
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if ((gus->gf1.uart_cmd & 0x20) == 0) {
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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/* wait for empty Rx - Tx is probably unlocked */
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timeout = 10000;
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while (timeout-- > 0 && snd_gf1_uart_stat(gus) & 0x01);
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/* Tx FIFO free? */
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spin_lock_irqsave(&gus->uart_cmd_lock, flags);
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if (gus->gf1.uart_cmd & 0x20) {
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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return;
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}
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if (snd_gf1_uart_stat(gus) & 0x02) {
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if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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return;
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}
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snd_gf1_uart_put(gus, byte);
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}
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snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd | 0x20); /* enable Tx interrupt */
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}
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} else {
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if (gus->gf1.uart_cmd & 0x20)
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snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x20);
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}
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spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
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}
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static const struct snd_rawmidi_ops snd_gf1_uart_output =
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{
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.open = snd_gf1_uart_output_open,
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.close = snd_gf1_uart_output_close,
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.trigger = snd_gf1_uart_output_trigger,
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};
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static const struct snd_rawmidi_ops snd_gf1_uart_input =
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{
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.open = snd_gf1_uart_input_open,
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.close = snd_gf1_uart_input_close,
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.trigger = snd_gf1_uart_input_trigger,
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};
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int snd_gf1_rawmidi_new(struct snd_gus_card *gus, int device)
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{
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struct snd_rawmidi *rmidi;
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int err;
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if ((err = snd_rawmidi_new(gus->card, "GF1", device, 1, 1, &rmidi)) < 0)
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return err;
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strcpy(rmidi->name, gus->interwave ? "AMD InterWave" : "GF1");
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_gf1_uart_output);
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_gf1_uart_input);
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
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rmidi->private_data = gus;
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gus->midi_uart = rmidi;
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return err;
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}
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