Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/alpha/kernel/es1888.c | |
3 | * | |
4 | * Init the built-in ES1888 sound chip (SB16 compatible) | |
5 | */ | |
6 | ||
7 | #include <linux/init.h> | |
8 | #include <asm/io.h> | |
9 | #include "proto.h" | |
10 | ||
11 | void __init | |
12 | es1888_init(void) | |
13 | { | |
14 | /* Sequence of IO reads to init the audio controller */ | |
15 | inb(0x0229); | |
16 | inb(0x0229); | |
17 | inb(0x0229); | |
18 | inb(0x022b); | |
19 | inb(0x0229); | |
20 | inb(0x022b); | |
21 | inb(0x0229); | |
22 | inb(0x0229); | |
23 | inb(0x022b); | |
24 | inb(0x0229); | |
25 | inb(0x0220); /* This sets the base address to 0x220 */ | |
26 | ||
27 | /* Sequence to set DMA channels */ | |
28 | outb(0x01, 0x0226); /* reset */ | |
29 | inb(0x0226); /* pause */ | |
30 | outb(0x00, 0x0226); /* release reset */ | |
31 | while (!(inb(0x022e) & 0x80)) /* wait for bit 7 to assert*/ | |
32 | continue; | |
33 | inb(0x022a); /* pause */ | |
34 | outb(0xc6, 0x022c); /* enable extended mode */ | |
35 | inb(0x022a); /* pause, also forces the write */ | |
36 | while (inb(0x022c) & 0x80) /* wait for bit 7 to deassert */ | |
37 | continue; | |
38 | outb(0xb1, 0x022c); /* setup for write to Interrupt CR */ | |
39 | while (inb(0x022c) & 0x80) /* wait for bit 7 to deassert */ | |
40 | continue; | |
41 | outb(0x14, 0x022c); /* set IRQ 5 */ | |
42 | while (inb(0x022c) & 0x80) /* wait for bit 7 to deassert */ | |
43 | continue; | |
44 | outb(0xb2, 0x022c); /* setup for write to DMA CR */ | |
45 | while (inb(0x022c) & 0x80) /* wait for bit 7 to deassert */ | |
46 | continue; | |
47 | outb(0x18, 0x022c); /* set DMA channel 1 */ | |
48 | inb(0x022c); /* force the write */ | |
49 | } |