/*
* sound/cs4232.c
*
* The low level driver for Crystal CS4232 based cards. The CS4232 is a PnP
* compatible chip which contains a CS4231A codec, SB emulation, a MPU401
* compatible MIDI port, joystick and synthesizer and IDE CD-ROM interfaces.
* This is just a temporary driver until full PnP support gets inplemented.
* Just the WSS codec, FM synth and the MIDI ports are supported. Other
* interfaces are left uninitialized.
*
* Copyright by Hannu Savolainen 1995
*
* 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 <i386/isa/sound/sound_config.h>
#if defined(CONFIG_CS4232)
#define KEY_PORT 0x279 /* Same as LPT1 status port */
#define CSN_NUM 0x99 /* Just a random number */
#define CS_OUT(a) outb( KEY_PORT, a)
#define CS_OUT2(a, b) {CS_OUT(a);CS_OUT(b);}
#define CS_OUT3(a, b, c) {CS_OUT(a);CS_OUT(b);CS_OUT(c);}
static int mpu_base = 0, mpu_irq = 0;
static int mpu_detected = 0;
int
probe_cs4232_mpu(struct address_info * hw_config)
{
/*
* Just write down the config values.
*/
mpu_base = hw_config->io_base;
mpu_irq = hw_config->irq;
return 0;
}
void
attach_cs4232_mpu(struct address_info * hw_config)
{
}
static unsigned char crystal_key[] = /* A 32 byte magic key sequence */
{
0x96, 0x35, 0x9a, 0xcd, 0xe6, 0xf3, 0x79, 0xbc,
0x5e, 0xaf, 0x57, 0x2b, 0x15, 0x8a, 0xc5, 0xe2,
0xf1, 0xf8, 0x7c, 0x3e, 0x9f, 0x4f, 0x27, 0x13,
0x09, 0x84, 0x42, 0xa1, 0xd0, 0x68, 0x34, 0x1a
};
int
probe_cs4232(struct address_info * hw_config)
{
int i;
int base = hw_config->io_base, irq = hw_config->irq;
int dma1 = hw_config->dma, dma2 = hw_config->dma2;
/*
* Verify that the I/O port range is free.
*/
if (0) {
printf("cs4232.c: I/O port 0x%03x not free\n", base);
return 0;
}
/*
* This version of the driver doesn't use the PnP method when
* configuring the card but a simplified method defined by Crystal.
* This means that just one CS4232 compatible device can exist on the
* system. Also this method conflicts with possible PnP support in
* the OS. For this reason driver is just a temporary kludge.
*/
/*
* Wake up the card by sending a 32 byte Crystal key to the key port.
*/
for (i = 0; i < 32; i++)
CS_OUT(crystal_key[i]);
/*
* Now set the CSN (Card Select Number).
*/
CS_OUT2(0x06, CSN_NUM);
/*
* Ensure that there is no other codec using the same address.
*/
CS_OUT2(0x15, 0x00); /* Select logical device 0 (WSS/SB/FM) */
CS_OUT2(0x33, 0x00); /* Inactivate logical dev 0 */
/*
* Then set some config bytes. First logical device 0
*/
CS_OUT2(0x15, 0x00); /* Select logical device 0 (WSS/SB/FM) */
CS_OUT3(0x47, (base >> 8) & 0xff, base & 0xff); /* WSSbase */
if (0) /* Not free */
CS_OUT3(0x48, 0x00, 0x00) /* FMbase off */
else
CS_OUT3(0x48, 0x03, 0x88); /* FMbase 0x388 */
CS_OUT3(0x42, 0x00, 0x00); /* SBbase off */
CS_OUT2(0x22, irq); /* SB+WSS IRQ */
CS_OUT2(0x2a, dma1); /* SB+WSS DMA */
if (dma2 != -1)
CS_OUT2(0x25, dma2) /* WSS DMA2 */
else
CS_OUT2(0x25, 4); /* No WSS DMA2 */
CS_OUT2(0x33, 0x01); /* Activate logical dev 0 */
/*
* Initialize logical device 3 (MPU)
*/
#if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
if (mpu_base != 0 && mpu_irq != 0) {
CS_OUT2(0x15, 0x03); /* Select logical device 3 (MPU) */
CS_OUT3(0x47, (mpu_base >> 8) & 0xff, mpu_base & 0xff); /* MPUbase */
CS_OUT2(0x22, mpu_irq); /* MPU IRQ */
CS_OUT2(0x33, 0x01); /* Activate logical dev 3 */
}
#endif
/*
* Finally activate the chip
*/
CS_OUT(0x79);
/*
* Then try to detect the codec part of the chip
*/
return ad1848_detect(hw_config->io_base, NULL, hw_config->osp);
}
void
attach_cs4232(struct address_info * hw_config)
{
int base = hw_config->io_base, irq = hw_config->irq;
int dma1 = hw_config->dma, dma2 = hw_config->dma2;
if (dma2 == -1)
dma2 = dma1;
ad1848_init("CS4232", base,
irq,
dma1, /* Playback DMA */
dma2, /* Capture DMA */
0,
hw_config->osp);
#if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
if (mpu_base != 0 && mpu_irq != 0) {
static struct address_info hw_config2 =
{0}; /* Ensure it's initialized */
hw_config2.io_base = mpu_base;
hw_config2.irq = mpu_irq;
hw_config2.dma = -1;
hw_config2.dma2 = -1;
hw_config2.always_detect = 0;
hw_config2.name = NULL;
hw_config2.card_subtype = 0;
hw_config2.osp = hw_config->osp;
if (probe_mpu401(&hw_config2)) {
mpu_detected = 1;
attach_mpu401(&hw_config2);
} else {
mpu_base = mpu_irq = 0;
}
}
#endif
}
#endif
