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Diffstat (limited to 'sys/dev/sound/isa/es1888.c')
| -rw-r--r-- | sys/dev/sound/isa/es1888.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/sys/dev/sound/isa/es1888.c b/sys/dev/sound/isa/es1888.c new file mode 100644 index 0000000..2c9e87b --- /dev/null +++ b/sys/dev/sound/isa/es1888.c @@ -0,0 +1,175 @@ +/* + * Copyright (c) 1999 Doug Rabson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <dev/sound/pcm/sound.h> +#include <dev/sound/isa/sb.h> + +SND_DECLARE_FILE("$FreeBSD$"); + +#ifdef __alpha__ +static int +es1888_dspready(u_int32_t port) +{ + return ((inb(port + SBDSP_STATUS) & 0x80) == 0); +} + +static int +es1888_dspwr(u_int32_t port, u_char val) +{ + int i; + + for (i = 0; i < 1000; i++) { + if (es1888_dspready(port)) { + outb(port + SBDSP_CMD, val); + return 0; + } + if (i > 10) DELAY((i > 100)? 1000 : 10); + } + return ENXIO; +} + +static u_int +es1888_get_byte(u_int32_t port) +{ + int i; + + for (i = 1000; i > 0; i--) { + if (inb(port + DSP_DATA_AVAIL) & 0x80) + return inb(port + DSP_READ); + else + DELAY(20); + } + return 0xffff; +} + +static int +es1888_reset(u_int32_t port) +{ + outb(port + SBDSP_RST, 3); + DELAY(100); + outb(port + SBDSP_RST, 0); + if (es1888_get_byte(port) != 0xAA) { + return ENXIO; /* Sorry */ + } + return 0; +} + +static void +es1888_configuration_mode(void) +{ + /* + * Emit the Read-Sequence-Key to enter configuration + * mode. Note this only works after a reset (or after bit 2 of + * mixer register 0x40 is set). + * + * 3 reads from 0x229 in a row guarantees reset of key + * sequence to beginning. + */ + inb(0x229); + inb(0x229); + inb(0x229); + + inb(0x22b); /* state 1 */ + inb(0x229); /* state 2 */ + inb(0x22b); /* state 3 */ + inb(0x229); /* state 4 */ + inb(0x229); /* state 5 */ + inb(0x22b); /* state 6 */ + inb(0x229); /* state 7 */ +} + +static void +es1888_set_port(u_int32_t port) +{ + es1888_configuration_mode(); + inb(port); +} +#endif + +static void +es1888_identify(driver_t *driver, device_t parent) +{ +/* + * Only use this on alpha since PNPBIOS is a better solution on x86. + */ +#ifdef __alpha__ + u_int32_t lo, hi; + device_t dev; + + es1888_set_port(0x220); + if (es1888_reset(0x220)) + return; + + /* + * Check identification bytes for es1888. + */ + if (es1888_dspwr(0x220, 0xe7)) + return; + hi = es1888_get_byte(0x220); + lo = es1888_get_byte(0x220); + if (hi != 0x68 || (lo & 0xf0) != 0x80) + return; + + /* + * Program irq and drq. + */ + if (es1888_dspwr(0x220, 0xc6) /* enter extended mode */ + || es1888_dspwr(0x220, 0xb1) /* write register b1 */ + || es1888_dspwr(0x220, 0x14) /* enable irq 5 */ + || es1888_dspwr(0x220, 0xb2) /* write register b1 */ + || es1888_dspwr(0x220, 0x18)) /* enable drq 1 */ + return; + + /* + * Create the device and program its resources. + */ + dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); + bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x220, 0x10); + bus_set_resource(dev, SYS_RES_IRQ, 0, 5, 1); + bus_set_resource(dev, SYS_RES_DRQ, 0, 1, 1); + isa_set_vendorid(dev, PNP_EISAID("ESS1888")); + isa_set_logicalid(dev, PNP_EISAID("ESS1888")); +#endif +} + +static device_method_t es1888_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, es1888_identify), + + { 0, 0 } +}; + +static driver_t es1888_driver = { + "pcm", + es1888_methods, + 1, /* no softc */ +}; + +DRIVER_MODULE(snd_es1888, isa, es1888_driver, pcm_devclass, 0, 0); +MODULE_DEPEND(snd_es1888, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER); +MODULE_VERSION(snd_es1888, 1); + + |
