171 lines
4.1 KiB
C
171 lines
4.1 KiB
C
/*-
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* Copyright (c) 1999 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <dev/pcm/sound.h>
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#include <dev/pcm/isa/sb.h>
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#if NPCM > 0
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static int
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es1888_dspready(u_int32_t port)
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{
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return ((inb(port + SBDSP_STATUS) & 0x80) == 0);
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}
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static int
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es1888_dspwr(u_int32_t port, u_char val)
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{
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int i;
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for (i = 0; i < 1000; i++) {
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if (es1888_dspready(port)) {
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outb(port + SBDSP_CMD, val);
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return 0;
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}
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if (i > 10) DELAY((i > 100)? 1000 : 10);
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}
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return ENXIO;
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}
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static u_int
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es1888_get_byte(u_int32_t port)
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{
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int i;
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for (i = 1000; i > 0; i--) {
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if (inb(port + DSP_DATA_AVAIL) & 0x80)
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return inb(port + DSP_READ);
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else
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DELAY(20);
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}
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return 0xffff;
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}
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static int
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es1888_reset(u_int32_t port)
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{
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outb(port + SBDSP_RST, 3);
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DELAY(100);
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outb(port + SBDSP_RST, 0);
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if (es1888_get_byte(port) != 0xAA) {
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return ENXIO; /* Sorry */
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}
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return 0;
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}
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static void
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es1888_configuration_mode(void)
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{
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/*
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* Emit the Read-Sequence-Key to enter configuration
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* mode. Note this only works after a reset (or after bit 2 of
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* mixer register 0x40 is set).
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*
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* 3 reads from 0x229 in a row guarantees reset of key
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* sequence to beginning.
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*/
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inb(0x229);
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inb(0x229);
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inb(0x229);
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inb(0x22b); /* state 1 */
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inb(0x229); /* state 2 */
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inb(0x22b); /* state 3 */
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inb(0x229); /* state 4 */
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inb(0x229); /* state 5 */
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inb(0x22b); /* state 6 */
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inb(0x229); /* state 7 */
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}
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static void
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es1888_set_port(u_int32_t port)
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{
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es1888_configuration_mode();
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inb(port);
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}
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static void
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es1888_identify(driver_t *driver, device_t parent)
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{
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u_int32_t lo, hi;
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device_t dev;
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es1888_set_port(0x220);
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if (es1888_reset(0x220))
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return;
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/*
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* Check identification bytes for es1888.
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*/
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if (es1888_dspwr(0x220, 0xe7))
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return;
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hi = es1888_get_byte(0x220);
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lo = es1888_get_byte(0x220);
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if (hi != 0x68 || (lo & 0xf0) != 0x80)
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return;
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/*
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* Program irq and drq.
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*/
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if (es1888_dspwr(0x220, 0xc6) /* enter extended mode */
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|| es1888_dspwr(0x220, 0xb1) /* write register b1 */
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|| es1888_dspwr(0x220, 0x14) /* enable irq 5 */
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|| es1888_dspwr(0x220, 0xb2) /* write register b1 */
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|| es1888_dspwr(0x220, 0x18)) /* enable drq 1 */
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return;
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/*
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* Create the device and program its resources.
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*/
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dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);
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bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x220, 0x10);
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bus_set_resource(dev, SYS_RES_IRQ, 0, 5, 1);
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bus_set_resource(dev, SYS_RES_DRQ, 0, 1, 1);
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isa_set_vendorid(dev, PNP_EISAID("ESS1888"));
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isa_set_logicalid(dev, PNP_EISAID("ESS1888"));
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}
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static device_method_t es1888_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, es1888_identify),
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{ 0, 0 }
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};
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static driver_t es1888_driver = {
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"pcm",
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es1888_methods,
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1, /* no softc */
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};
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static devclass_t pcm_devclass;
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DRIVER_MODULE(es1888, isa, es1888_driver, pcm_devclass, 0, 0);
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#endif /* NPCM > 0 */
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