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|
/*****************************************************************************/
/*
* wss.c -- Linux soundcard HF FSK driver,
* WindowsSoundSystem specific functions.
*
* Copyright (C) 1997 Thomas Sailer (sailer@ife.ee.ethz.ch)
* Swiss Federal Institute of Technology (ETH), Electronics Lab
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*/
/*****************************************************************************/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/hfmodem.h>
/* --------------------------------------------------------------------- */
#define WSS_CONFIG(iobase) (iobase+0)
#define WSS_STATUS(iobase) (iobase+3)
#define WSS_CODEC_IA(iobase) (iobase+4)
#define WSS_CODEC_ID(iobase) (iobase+5)
#define WSS_CODEC_STATUS(iobase) (iobase+6)
#define WSS_CODEC_DATA(iobase) (iobase+7)
#define WSS_EXTENT 8
/* --------------------------------------------------------------------- */
extern const struct hfmodem_scops wss_scops;
/* --------------------------------------------------------------------- */
static void write_codec(struct hfmodem_state *dev, unsigned char idx,
unsigned char data)
{
int timeout = 900000;
/* wait until codec ready */
while (timeout > 0 && inb(WSS_CODEC_IA(dev->io.base_addr)) & 0x80)
timeout--;
outb(idx, WSS_CODEC_IA(dev->io.base_addr));
outb(data, WSS_CODEC_ID(dev->io.base_addr));
}
/* --------------------------------------------------------------------- */
static unsigned char read_codec(struct hfmodem_state *dev, unsigned char idx)
{
int timeout = 900000;
/* wait until codec ready */
while (timeout > 0 && inb(WSS_CODEC_IA(dev->io.base_addr)) & 0x80)
timeout--;
outb(idx & 0x1f, WSS_CODEC_IA(dev->io.base_addr));
return inb(WSS_CODEC_ID(dev->io.base_addr));
}
/* --------------------------------------------------------------------- */
extern __inline__ void wss_ack_int(struct hfmodem_state *dev)
{
outb(0, WSS_CODEC_STATUS(dev->io.base_addr));
}
/* --------------------------------------------------------------------- */
static int wss_srate_tab[16] = {
8000, 5510, 16000, 11025, 27420, 18900, 32000, 22050,
-1, 37800, -1, 44100, 48000, 33075, 9600, 6620
};
static int wss_srate_index(int srate)
{
int i;
for (i = 0; i < (sizeof(wss_srate_tab)/sizeof(wss_srate_tab[0])); i++)
if (srate == wss_srate_tab[i] && wss_srate_tab[i] > 0)
return i;
return -1;
}
/* --------------------------------------------------------------------- */
static int wss_set_codec_fmt(struct hfmodem_state *dev, unsigned char fmt)
{
unsigned long time;
unsigned long flags;
save_flags(flags);
cli();
/* Clock and data format register */
write_codec(dev, 0x48, fmt);
/* MCE and interface config reg */
write_codec(dev, 0x49, 0xc);
outb(0xb, WSS_CODEC_IA(dev->io.base_addr)); /* leave MCE */
/*
* wait for ACI start
*/
time = 1000;
while (!(read_codec(dev, 0x0b) & 0x20))
if (!(--time)) {
printk(KERN_WARNING "%s: ad1848 auto calibration timed out (1)\n",
hfmodem_drvname);
restore_flags(flags);
return -1;
}
/*
* wait for ACI end
*/
sti();
time = jiffies + HZ/4;
while ((read_codec(dev, 0x0b) & 0x20) && ((signed)(jiffies - time) < 0));
restore_flags(flags);
if ((signed)(jiffies - time) >= 0) {
printk(KERN_WARNING "%s: ad1848 auto calibration timed out (2)\n",
hfmodem_drvname);
return -1;
}
return 0;
}
/* --------------------------------------------------------------------- */
static int wss_init_codec(struct hfmodem_state *dev)
{
unsigned char tmp, revwss, revid;
static const signed char irqtab[16] = {
-1, -1, 0x10, -1, -1, -1, -1, 0x08, -1, 0x10, 0x18, 0x20, -1, -1, -1, -1
};
static const signed char dmatab[4] = { 1, 2, -1, 3 };
int fmt;
if ((fmt = wss_srate_index(HFMODEM_SRATE)) < 0) {
printk(KERN_ERR "%s: WSS: sampling rate not supported\n", hfmodem_drvname);
return -1;
}
fmt &= 0x0f;
#ifdef __BIG_ENDIAN
fmt |= 0xc0;
#else /* __BIG_ENDIAN */
fmt |= 0x40;
#endif /* __BIG_ENDIAN */
tmp = inb(WSS_STATUS(dev->io.base_addr));
if ((tmp & 0x3f) != 0x04 && (tmp & 0x3f) != 0x00 &&
(tmp & 0x3f) != 0x0f) {
printk(KERN_WARNING "%s: WSS card id register not found, "
"address 0x%x, ID register 0x%02x\n", hfmodem_drvname,
dev->io.base_addr, (int)tmp);
/* return -1; */
revwss = 0;
} else {
if ((tmp & 0x80) && ((dev->io.dma == 0) || ((dev->io.irq >= 8) && (dev->io.irq != 9)))) {
printk(KERN_ERR "%s: WSS: DMA0 and/or IRQ8..IRQ15 "
"(except IRQ9) cannot be used on an 8bit "
"card\n", hfmodem_drvname);
return -1;
}
if (dev->io.irq > 15 || irqtab[dev->io.irq] == -1) {
printk(KERN_ERR "%s: WSS: invalid interrupt %d\n",
hfmodem_drvname, (int)dev->io.irq);
return -1;
}
if (dev->io.dma > 3 || dmatab[dev->io.dma] == -1) {
printk(KERN_ERR "%s: WSS: invalid dma channel %d\n",
hfmodem_drvname, (int)dev->io.dma);
return -1;
}
tmp = irqtab[dev->io.irq] | dmatab[dev->io.dma];
/* irq probe */
outb((tmp & 0x38) | 0x40, WSS_CONFIG(dev->io.base_addr));
if (!(inb(WSS_STATUS(dev->io.base_addr)) & 0x40)) {
outb(0, WSS_CONFIG(dev->io.base_addr));
printk(KERN_ERR "%s: WSS: IRQ%d is not free!\n",
hfmodem_drvname, dev->io.irq);
}
outb(tmp, WSS_CONFIG(dev->io.base_addr));
revwss = inb(WSS_STATUS(dev->io.base_addr)) & 0x3f;
}
/*
* initialize the codec
*/
write_codec(dev, 9, 0);
write_codec(dev, 12, 0);
write_codec(dev, 0, 0x45);
if (read_codec(dev, 0) != 0x45)
goto codec_err;
write_codec(dev, 0, 0xaa);
if (read_codec(dev, 0) != 0xaa)
goto codec_err;
if (wss_set_codec_fmt(dev, fmt))
goto codec_err;
write_codec(dev, 0, 0x40); /* left input control */
write_codec(dev, 1, 0x40); /* right input control */
write_codec(dev, 2, 0x80); /* left aux#1 input control */
write_codec(dev, 3, 0x80); /* right aux#1 input control */
write_codec(dev, 4, 0x80); /* left aux#2 input control */
write_codec(dev, 5, 0x80); /* right aux#2 input control */
write_codec(dev, 6, 0x80); /* left dac control */
write_codec(dev, 7, 0x80); /* right dac control */
write_codec(dev, 0xa, 0x2); /* pin control register */
write_codec(dev, 0xd, 0x0); /* digital mix control */
revid = read_codec(dev, 0xc) & 0xf;
/*
* print revisions
*/
printk(KERN_INFO "%s: WSS revision %d, CODEC revision %d\n",
hfmodem_drvname, (int)revwss, (int)revid);
return 0;
codec_err:
outb(0, WSS_CONFIG(dev->io.base_addr));
printk(KERN_ERR "%s: no WSS soundcard found at address 0x%x\n",
hfmodem_drvname, dev->io.base_addr);
return -1;
}
/* --------------------------------------------------------------------- */
int hfmodem_wssprobe(struct hfmodem_state *dev)
{
if (dev->io.base_addr <= 0 || dev->io.base_addr > 0x1000-WSS_EXTENT ||
dev->io.irq < 2 || dev->io.irq > 15 || dev->io.dma > 3 || dev->io.dma == 2)
return -ENXIO;
if (check_region(dev->io.base_addr, WSS_EXTENT))
return -EACCES;
/*
* check if a card is available
*/
if (wss_init_codec(dev)) {
printk(KERN_ERR "%s: sbc: no card at io address 0x%x\n",
hfmodem_drvname, dev->io.base_addr);
return -ENODEV;
}
dev->scops = &wss_scops;
return 0;
}
/* --------------------------------------------------------------------- */
static void wss_init(struct hfmodem_state *dev)
{
wss_init_codec(dev);
}
/* --------------------------------------------------------------------- */
static void wss_stop(struct hfmodem_state *dev)
{
unsigned long flags;
unsigned char oldcodecmode;
long abrt;
save_flags(flags);
cli();
/*
* perform the final DMA sequence to disable the codec request
*/
oldcodecmode = read_codec(dev, 9);
write_codec(dev, 9, 0xc); /* disable codec */
wss_ack_int(dev);
if (read_codec(dev, 11) & 0x10) {
disable_dma(dev->io.dma);
clear_dma_ff(dev->io.dma);
set_dma_mode(dev->io.dma, (oldcodecmode & 1) ?
(DMA_MODE_WRITE | DMA_MODE_AUTOINIT) : (DMA_MODE_READ | DMA_MODE_AUTOINIT));
set_dma_addr(dev->io.dma, virt_to_bus(dev->dma.buf));
set_dma_count(dev->io.dma, HFMODEM_NUMFRAGS * HFMODEM_FRAGSIZE);
enable_dma(dev->io.dma);
abrt = 0;
while ((read_codec(dev, 11) & 0x10) || ((++abrt) >= 0x10000));
}
disable_dma(dev->io.dma);
restore_flags(flags);
}
/* --------------------------------------------------------------------- */
static void wss_prepare_input(struct hfmodem_state *dev)
{
unsigned long flags;
wss_stop(dev);
save_flags(flags);
cli();
disable_dma(dev->io.dma);
clear_dma_ff(dev->io.dma);
set_dma_mode(dev->io.dma, DMA_MODE_READ | DMA_MODE_AUTOINIT);
set_dma_addr(dev->io.dma, virt_to_bus(dev->dma.buf));
set_dma_count(dev->io.dma, HFMODEM_NUMFRAGS * HFMODEM_FRAGSIZE);
enable_dma(dev->io.dma);
write_codec(dev, 15, (HFMODEM_FRAGSAMPLES-1) & 0xff);
write_codec(dev, 14, (HFMODEM_FRAGSAMPLES-1) >> 8);
restore_flags(flags);
}
/* --------------------------------------------------------------------- */
static void wss_trigger_input(struct hfmodem_state *dev)
{
unsigned long flags;
save_flags(flags);
cli();
write_codec(dev, 9, 0x0e);
restore_flags(flags);
}
/* --------------------------------------------------------------------- */
static void wss_prepare_output(struct hfmodem_state *dev)
{
unsigned long flags;
wss_stop(dev);
save_flags(flags);
cli();
disable_dma(dev->io.dma);
clear_dma_ff(dev->io.dma);
set_dma_mode(dev->io.dma, DMA_MODE_WRITE | DMA_MODE_AUTOINIT);
set_dma_addr(dev->io.dma, virt_to_bus(dev->dma.buf));
set_dma_count(dev->io.dma, HFMODEM_NUMFRAGS * HFMODEM_FRAGSIZE);
enable_dma(dev->io.dma);
write_codec(dev, 15, (HFMODEM_FRAGSAMPLES-1) & 0xff);
write_codec(dev, 14, (HFMODEM_FRAGSAMPLES-1) >> 8);
restore_flags(flags);
}
/* --------------------------------------------------------------------- */
static void wss_trigger_output(struct hfmodem_state *dev)
{
unsigned long flags;
save_flags(flags);
cli();
write_codec(dev, 9, 0x0d);
restore_flags(flags);
}
/* --------------------------------------------------------------------- */
static unsigned int wss_intack(struct hfmodem_state *dev)
{
unsigned int dmaptr, nums;
unsigned long flags;
save_flags(flags);
cli();
wss_ack_int(dev);
disable_dma(dev->io.dma);
clear_dma_ff(dev->io.dma);
dmaptr = get_dma_residue(dev->io.dma);
if (dmaptr == 0 || dmaptr > HFMODEM_NUMFRAGS * HFMODEM_FRAGSIZE)
dmaptr = HFMODEM_NUMFRAGS * HFMODEM_FRAGSIZE;
nums = (((dmaptr - 1) % HFMODEM_FRAGSIZE) - 1) / 2;
write_codec(dev, 15, nums & 0xff);
write_codec(dev, 14, nums >> 8);
enable_dma(dev->io.dma);
restore_flags(flags);
return (HFMODEM_NUMFRAGS * HFMODEM_FRAGSIZE - dmaptr) / 2;
}
/* --------------------------------------------------------------------- */
static void wss_mixer(struct hfmodem_state *dev, int src, int igain, int ogain)
{
unsigned long flags;
static const unsigned char srctoreg[3] = { 1, 2, 0 };
static const unsigned char regtosrc[4] = { 2, 0, 1, 0 };
unsigned char tmp;
save_flags(flags);
cli();
tmp = read_codec(dev, 0x00);
if (src < 0 || src > 2)
src = regtosrc[(tmp >> 6) & 3];
if (igain < 0 || igain > 255) {
if (src == 1)
igain = ((tmp & 0xf) + ((tmp & 0x20) ? 13 : 0)) << 3;
else
igain = (tmp & 0xf) << 4;
}
if (src == 1) {
if (igain > (28<<3))
tmp = 0x2f;
else if (igain >= (13<<3))
tmp = 0x20 + (((igain >> 3) - 13) & 0xf);
else
tmp = (igain >> 3) & 0xf;
} else
tmp = (igain >> 4) & 0xf;
tmp |= srctoreg[src] << 6;
write_codec(dev, 0, tmp);
write_codec(dev, 1, tmp);
if (ogain > 0 && ogain <= 255) {
tmp = 63 - (ogain >> 2);
write_codec(dev, 6, tmp);
write_codec(dev, 7, tmp);
} else if (ogain == 0) {
write_codec(dev, 6, 0x80);
write_codec(dev, 7, 0x80);
}
restore_flags(flags);
}
/* --------------------------------------------------------------------- */
static const struct hfmodem_scops wss_scops = {
WSS_EXTENT, wss_init, wss_prepare_input, wss_trigger_input,
wss_prepare_output, wss_trigger_output, wss_stop, wss_intack, wss_mixer
};
/* --------------------------------------------------------------------- */
|
