1// SPDX-License-Identifier: GPL-2.0
2/*
3 *	linux/arch/alpha/kernel/es1888.c
4 *
5 * Init the built-in ES1888 sound chip (SB16 compatible)
6 */
7
8#include <linux/init.h>
9#include <asm/io.h>
10#include "proto.h"
11
12void __init
13es1888_init(void)
14{
15	/* Sequence of IO reads to init the audio controller */
16	inb(0x0229);
17	inb(0x0229);
18	inb(0x0229);
19	inb(0x022b);
20	inb(0x0229);
21	inb(0x022b);
22	inb(0x0229);
23	inb(0x0229);
24	inb(0x022b);
25	inb(0x0229);
26	inb(0x0220); /* This sets the base address to 0x220 */
27
28	/* Sequence to set DMA channels */
29	outb(0x01, 0x0226);		/* reset */
30	inb(0x0226);			/* pause */
31	outb(0x00, 0x0226);		/* release reset */
32	while (!(inb(0x022e) & 0x80))	/* wait for bit 7 to assert*/
33		continue;
34	inb(0x022a);			/* pause */
35	outb(0xc6, 0x022c);		/* enable extended mode */
36	inb(0x022a);			/* pause, also forces the write */
37	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
38		continue;
39	outb(0xb1, 0x022c);		/* setup for write to Interrupt CR */
40	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
41		continue;
42	outb(0x14, 0x022c);		/* set IRQ 5 */
43	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
44		continue;
45	outb(0xb2, 0x022c);		/* setup for write to DMA CR */
46	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
47		continue;
48	outb(0x18, 0x022c);		/* set DMA channel 1 */
49	inb(0x022c);			/* force the write */
50}
51