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sb_ess.c
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sb_ess.c
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#undef FKS_LOGGING
#undef FKS_TEST
/*
* tabs should be 4 spaces, in vi(m): set tabstop=4
*
* TODO: consistency speed calculations!!
* cleanup!
* ????: Did I break MIDI support?
*
* History:
*
* Rolf Fokkens (Dec 20 1998): ES188x recording level support on a per
* fokkensr@vertis.nl input basis.
* (Dec 24 1998): Recognition of ES1788, ES1887, ES1888,
* ES1868, ES1869 and ES1878. Could be used for
* specific handling in the future. All except
* ES1887 and ES1888 and ES688 are handled like
* ES1688.
* (Dec 27 1998): RECLEV for all (?) ES1688+ chips. ES188x now
* have the "Dec 20" support + RECLEV
* (Jan 2 1999): Preparation for Full Duplex. This means
* Audio 2 is now used for playback when dma16
* is specified. The next step would be to use
* Audio 1 and Audio 2 at the same time.
* (Jan 9 1999): Put all ESS stuff into sb_ess.[ch], this
* includes both the ESS stuff that has been in
* sb_*[ch] before I touched it and the ESS support
* I added later
* (Jan 23 1999): Full Duplex seems to work. I wrote a small
* test proggy which works OK. Haven't found
* any applications to test it though. So why did
* I bother to create it anyway?? :) Just for
* fun.
* (May 2 1999): I tried to be too smart by "introducing"
* ess_calc_best_speed (). The idea was that two
* dividers could be used to setup a samplerate,
* ess_calc_best_speed () would choose the best.
* This works for playback, but results in
* recording problems for high samplerates. I
* fixed this by removing ess_calc_best_speed ()
* and just doing what the documentation says.
* Andy Sloane (Jun 4 1999): Stole some code from ALSA to fix the playback
* andy@guildsoftware.com speed on ES1869, ES1879, ES1887, and ES1888.
* 1879's were previously ignored by this driver;
* added (untested) support for those.
* Cvetan Ivanov (Oct 27 1999): Fixed ess_dsp_init to call ess_set_dma_hw for
* zezo@inet.bg _ALL_ ESS models, not only ES1887
*
* This files contains ESS chip specifics. It's based on the existing ESS
* handling as it resided in sb_common.c, sb_mixer.c and sb_audio.c. This
* file adds features like:
* - Chip Identification (as shown in /proc/sound)
* - RECLEV support for ES1688 and later
* - 6 bits playback level support chips later than ES1688
* - Recording level support on a per-device basis for ES1887
* - Full-Duplex for ES1887
*
* Full duplex is enabled by specifying dma16. While the normal dma must
* be one of 0, 1 or 3, dma16 can be one of 0, 1, 3 or 5. DMA 5 is a 16 bit
* DMA channel, while the others are 8 bit..
*
* ESS detection isn't full proof (yet). If it fails an additional module
* parameter esstype can be specified to be one of the following:
* -1, 0, 688, 1688, 1868, 1869, 1788, 1887, 1888
* -1 means: mimic 2.0 behaviour,
* 0 means: auto detect.
* others: explicitly specify chip
* -1 is default, cause auto detect still doesn't work.
*/
/*
* About the documentation
*
* I don't know if the chips all are OK, but the documentation is buggy. 'cause
* I don't have all the cips myself, there's a lot I cannot verify. I'll try to
* keep track of my latest insights about his here. If you have additional info,
* please enlighten me (fokkensr@vertis.nl)!
*
* I had the impression that ES1688 also has 6 bit master volume control. The
* documentation about ES1888 (rev C, october '95) claims that ES1888 has
* the following features ES1688 doesn't have:
* - 6 bit master volume
* - Full Duplex
* So ES1688 apparently doesn't have 6 bit master volume control, but the
* ES1688 does have RECLEV control. Makes me wonder: does ES688 have it too?
* Without RECLEV ES688 won't be much fun I guess.
*
* From the ES1888 (rev C, october '95) documentation I got the impression
* that registers 0x68 to 0x6e don't exist which means: no recording volume
* controls. To my surprise the ES888 documentation (1/14/96) claims that
* ES888 does have these record mixer registers, but that ES1888 doesn't have
* 0x69 and 0x6b. So the rest should be there.
*
* I'm trying to get ES1887 Full Duplex. Audio 2 is playback only, while Audio 2
* is both record and playback. I think I should use Audio 2 for all playback.
*
* The documentation is an adventure: it's close but not fully accurate. I
* found out that after a reset some registers are *NOT* reset, though the
* docs say the would be. Interesting ones are 0x7f, 0x7d and 0x7a. They are
* related to the Audio 2 channel. I also was surprised about the consequences
* of writing 0x00 to 0x7f (which should be done by reset): The ES1887 moves
* into ES1888 mode. This means that it claims IRQ 11, which happens to be my
* ISDN adapter. Needless to say it no longer worked. I now understand why
* after rebooting 0x7f already was 0x05, the value of my choice: the BIOS
* did it.
*
* Oh, and this is another trap: in ES1887 docs mixer register 0x70 is
* described as if it's exactly the same as register 0xa1. This is *NOT* true.
* The description of 0x70 in ES1869 docs is accurate however.
* Well, the assumption about ES1869 was wrong: register 0x70 is very much
* like register 0xa1, except that bit 7 is always 1, whatever you want
* it to be.
*
* When using audio 2 mixer register 0x72 seems te be meaningless. Only 0xa2
* has effect.
*
* Software reset not being able to reset all registers is great! Especially
* the fact that register 0x78 isn't reset is great when you wanna change back
* to single dma operation (simplex): audio 2 is still operational, and uses
* the same dma as audio 1: your ess changes into a funny echo machine.
*
* Received the news that ES1688 is detected as a ES1788. Did some thinking:
* the ES1887 detection scheme suggests in step 2 to try if bit 3 of register
* 0x64 can be changed. This is inaccurate, first I inverted the * check: "If
* can be modified, it's a 1688", which lead to a correct detection
* of my ES1887. It resulted however in bad detection of 1688 (reported by mail)
* and 1868 (if no PnP detection first): they result in a 1788 being detected.
* I don't have docs on 1688, but I do have docs on 1868: The documentation is
* probably inaccurate in the fact that I should check bit 2, not bit 3. This
* is what I do now.
*/
/*
* About recognition of ESS chips
*
* The distinction of ES688, ES1688, ES1788, ES1887 and ES1888 is described in
* a (preliminary ??) datasheet on ES1887. Its aim is to identify ES1887, but
* during detection the text claims that "this chip may be ..." when a step
* fails. This scheme is used to distinct between the above chips.
* It appears however that some PnP chips like ES1868 are recognized as ES1788
* by the ES1887 detection scheme. These PnP chips can be detected in another
* way however: ES1868, ES1869 and ES1878 can be recognized (full proof I think)
* by repeatedly reading mixer register 0x40. This is done by ess_identify in
* sb_common.c.
* This results in the following detection steps:
* - distinct between ES688 and ES1688+ (as always done in this driver)
* if ES688 we're ready
* - try to detect ES1868, ES1869 or ES1878
* if successful we're ready
* - try to detect ES1888, ES1887 or ES1788
* if successful we're ready
* - Dunno. Must be 1688. Will do in general
*
* About RECLEV support:
*
* The existing ES1688 support didn't take care of the ES1688+ recording
* levels very well. Whenever a device was selected (recmask) for recording
* its recording level was loud, and it couldn't be changed. The fact that
* internal register 0xb4 could take care of RECLEV, didn't work meaning until
* its value was restored every time the chip was reset; this reset the
* value of 0xb4 too. I guess that's what 4front also had (have?) trouble with.
*
* About ES1887 support:
*
* The ES1887 has separate registers to control the recording levels, for all
* inputs. The ES1887 specific software makes these levels the same as their
* corresponding playback levels, unless recmask says they aren't recorded. In
* the latter case the recording volumes are 0.
* Now recording levels of inputs can be controlled, by changing the playback
* levels. Futhermore several devices can be recorded together (which is not
* possible with the ES1688).
* Besides the separate recording level control for each input, the common
* recording level can also be controlled by RECLEV as described above.
*
* Not only ES1887 have this recording mixer. I know the following from the
* documentation:
* ES688 no
* ES1688 no
* ES1868 no
* ES1869 yes
* ES1878 no
* ES1879 yes
* ES1888 no/yes Contradicting documentation; most recent: yes
* ES1946 yes This is a PCI chip; not handled by this driver
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include "sound_config.h"
#include "sb_mixer.h"
#include "sb.h"
#include "sb_ess.h"
#define ESSTYPE_LIKE20 -1 /* Mimic 2.0 behaviour */
#define ESSTYPE_DETECT 0 /* Mimic 2.0 behaviour */
#define SUBMDL_ES1788 0x10 /* Subtype ES1788 for specific handling */
#define SUBMDL_ES1868 0x11 /* Subtype ES1868 for specific handling */
#define SUBMDL_ES1869 0x12 /* Subtype ES1869 for specific handling */
#define SUBMDL_ES1878 0x13 /* Subtype ES1878 for specific handling */
#define SUBMDL_ES1879 0x16 /* ES1879 was initially forgotten */
#define SUBMDL_ES1887 0x14 /* Subtype ES1887 for specific handling */
#define SUBMDL_ES1888 0x15 /* Subtype ES1888 for specific handling */
#define SB_CAP_ES18XX_RATE 0x100
#define ES1688_CLOCK1 795444 /* 128 - div */
#define ES1688_CLOCK2 397722 /* 256 - div */
#define ES18XX_CLOCK1 793800 /* 128 - div */
#define ES18XX_CLOCK2 768000 /* 256 - div */
#ifdef FKS_LOGGING
static void ess_show_mixerregs (sb_devc *devc);
#endif
static int ess_read (sb_devc * devc, unsigned char reg);
static int ess_write (sb_devc * devc, unsigned char reg, unsigned char data);
static void ess_chgmixer
(sb_devc * devc, unsigned int reg, unsigned int mask, unsigned int val);
/****************************************************************************
* *
* ESS audio *
* *
****************************************************************************/
struct ess_command {short cmd; short data;};
/*
* Commands for initializing Audio 1 for input (record)
*/
static struct ess_command ess_i08m[] = /* input 8 bit mono */
{ {0xb7, 0x51}, {0xb7, 0xd0}, {-1, 0} };
static struct ess_command ess_i16m[] = /* input 16 bit mono */
{ {0xb7, 0x71}, {0xb7, 0xf4}, {-1, 0} };
static struct ess_command ess_i08s[] = /* input 8 bit stereo */
{ {0xb7, 0x51}, {0xb7, 0x98}, {-1, 0} };
static struct ess_command ess_i16s[] = /* input 16 bit stereo */
{ {0xb7, 0x71}, {0xb7, 0xbc}, {-1, 0} };
static struct ess_command *ess_inp_cmds[] =
{ ess_i08m, ess_i16m, ess_i08s, ess_i16s };
/*
* Commands for initializing Audio 1 for output (playback)
*/
static struct ess_command ess_o08m[] = /* output 8 bit mono */
{ {0xb6, 0x80}, {0xb7, 0x51}, {0xb7, 0xd0}, {-1, 0} };
static struct ess_command ess_o16m[] = /* output 16 bit mono */
{ {0xb6, 0x00}, {0xb7, 0x71}, {0xb7, 0xf4}, {-1, 0} };
static struct ess_command ess_o08s[] = /* output 8 bit stereo */
{ {0xb6, 0x80}, {0xb7, 0x51}, {0xb7, 0x98}, {-1, 0} };
static struct ess_command ess_o16s[] = /* output 16 bit stereo */
{ {0xb6, 0x00}, {0xb7, 0x71}, {0xb7, 0xbc}, {-1, 0} };
static struct ess_command *ess_out_cmds[] =
{ ess_o08m, ess_o16m, ess_o08s, ess_o16s };
static void ess_exec_commands
(sb_devc *devc, struct ess_command *cmdtab[])
{
struct ess_command *cmd;
cmd = cmdtab [ ((devc->channels != 1) << 1) + (devc->bits != AFMT_U8) ];
while (cmd->cmd != -1) {
ess_write (devc, cmd->cmd, cmd->data);
cmd++;
}
}
static void ess_change
(sb_devc *devc, unsigned int reg, unsigned int mask, unsigned int val)
{
int value;
value = ess_read (devc, reg);
value = (value & ~mask) | (val & mask);
ess_write (devc, reg, value);
}
static void ess_set_output_parms
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
if (devc->duplex) {
devc->trg_buf_16 = buf;
devc->trg_bytes_16 = nr_bytes;
devc->trg_intrflag_16 = intrflag;
devc->irq_mode_16 = IMODE_OUTPUT;
} else {
devc->trg_buf = buf;
devc->trg_bytes = nr_bytes;
devc->trg_intrflag = intrflag;
devc->irq_mode = IMODE_OUTPUT;
}
}
static void ess_set_input_parms
(int dev, unsigned long buf, int count, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
devc->trg_buf = buf;
devc->trg_bytes = count;
devc->trg_intrflag = intrflag;
devc->irq_mode = IMODE_INPUT;
}
static int ess_calc_div (int clock, int revert, int *speedp, int *diffp)
{
int divider;
int speed, diff;
int retval;
speed = *speedp;
divider = (clock + speed / 2) / speed;
retval = revert - divider;
if (retval > revert - 1) {
retval = revert - 1;
divider = revert - retval;
}
/* This line is suggested. Must be wrong I think
*speedp = (clock + divider / 2) / divider;
So I chose the next one */
*speedp = clock / divider;
diff = speed - *speedp;
if (diff < 0) diff =-diff;
*diffp = diff;
return retval;
}
static int ess_calc_best_speed
(int clock1, int rev1, int clock2, int rev2, int *divp, int *speedp)
{
int speed1 = *speedp, speed2 = *speedp;
int div1, div2;
int diff1, diff2;
int retval;
div1 = ess_calc_div (clock1, rev1, &speed1, &diff1);
div2 = ess_calc_div (clock2, rev2, &speed2, &diff2);
if (diff1 < diff2) {
*divp = div1;
*speedp = speed1;
retval = 1;
} else {
/* *divp = div2; */
*divp = 0x80 | div2;
*speedp = speed2;
retval = 2;
}
return retval;
}
/*
* Depending on the audiochannel ESS devices can
* have different clock settings. These are made consistent for duplex
* however.
* callers of ess_speed only do an audionum suggestion, which means
* input suggests 1, output suggests 2. This suggestion is only true
* however when doing duplex.
*/
static void ess_common_speed (sb_devc *devc, int *speedp, int *divp)
{
int diff = 0, div;
if (devc->duplex) {
/*
* The 0x80 is important for the first audio channel
*/
if (devc->submodel == SUBMDL_ES1888) {
div = 0x80 | ess_calc_div (795500, 256, speedp, &diff);
} else {
div = 0x80 | ess_calc_div (795500, 128, speedp, &diff);
}
} else if(devc->caps & SB_CAP_ES18XX_RATE) {
if (devc->submodel == SUBMDL_ES1888) {
ess_calc_best_speed(397700, 128, 795500, 256,
&div, speedp);
} else {
ess_calc_best_speed(ES18XX_CLOCK1, 128, ES18XX_CLOCK2, 256,
&div, speedp);
}
} else {
if (*speedp > 22000) {
div = 0x80 | ess_calc_div (ES1688_CLOCK1, 256, speedp, &diff);
} else {
div = 0x00 | ess_calc_div (ES1688_CLOCK2, 128, speedp, &diff);
}
}
*divp = div;
}
static void ess_speed (sb_devc *devc, int audionum)
{
int speed;
int div, div2;
ess_common_speed (devc, &(devc->speed), &div);
#ifdef FKS_REG_LOGGING
printk (KERN_INFO "FKS: ess_speed (%d) b speed = %d, div=%x\n", audionum, devc->speed, div);
#endif
/* Set filter roll-off to 90% of speed/2 */
speed = (devc->speed * 9) / 20;
div2 = 256 - 7160000 / (speed * 82);
if (!devc->duplex) audionum = 1;
if (audionum == 1) {
/* Change behaviour of register A1 *
sb_chg_mixer(devc, 0x71, 0x20, 0x20)
* For ES1869 only??? */
ess_write (devc, 0xa1, div);
ess_write (devc, 0xa2, div2);
} else {
ess_setmixer (devc, 0x70, div);
/*
* FKS: fascinating: 0x72 doesn't seem to work.
*/
ess_write (devc, 0xa2, div2);
ess_setmixer (devc, 0x72, div2);
}
}
static int ess_audio_prepare_for_input(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
ess_speed(devc, 1);
sb_dsp_command(devc, DSP_CMD_SPKOFF);
ess_write (devc, 0xb8, 0x0e); /* Auto init DMA mode */
ess_change (devc, 0xa8, 0x03, 3 - devc->channels); /* Mono/stereo */
ess_write (devc, 0xb9, 2); /* Demand mode (4 bytes/DMA request) */
ess_exec_commands (devc, ess_inp_cmds);
ess_change (devc, 0xb1, 0xf0, 0x50);
ess_change (devc, 0xb2, 0xf0, 0x50);
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output_audio1 (int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
sb_dsp_reset(devc);
ess_speed(devc, 1);
ess_write (devc, 0xb8, 4); /* Auto init DMA mode */
ess_change (devc, 0xa8, 0x03, 3 - devc->channels); /* Mono/stereo */
ess_write (devc, 0xb9, 2); /* Demand mode (4 bytes/request) */
ess_exec_commands (devc, ess_out_cmds);
ess_change (devc, 0xb1, 0xf0, 0x50); /* Enable DMA */
ess_change (devc, 0xb2, 0xf0, 0x50); /* Enable IRQ */
sb_dsp_command(devc, DSP_CMD_SPKON); /* There be sound! */
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output_audio2 (int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
unsigned char bits;
/* FKS: qqq
sb_dsp_reset(devc);
*/
/*
* Auto-Initialize:
* DMA mode + demand mode (8 bytes/request, yes I want it all!)
* But leave 16-bit DMA bit untouched!
*/
ess_chgmixer (devc, 0x78, 0xd0, 0xd0);
ess_speed(devc, 2);
/* bits 4:3 on ES1887 represent recording source. Keep them! */
bits = ess_getmixer (devc, 0x7a) & 0x18;
/* Set stereo/mono */
if (devc->channels != 1) bits |= 0x02;
/* Init DACs; UNSIGNED mode for 8 bit; SIGNED mode for 16 bit */
if (devc->bits != AFMT_U8) bits |= 0x05; /* 16 bit */
/* Enable DMA, IRQ will be shared (hopefully)*/
bits |= 0x60;
ess_setmixer (devc, 0x7a, bits);
ess_mixer_reload (devc, SOUND_MIXER_PCM); /* There be sound! */
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "ess_audio_prepare_for_output: dma_out=%d,dma_in=%d\n"
, audio_devs[dev]->dmap_out->dma, audio_devs[dev]->dmap_in->dma);
#endif
if (devc->duplex) {
return ess_audio_prepare_for_output_audio2 (dev, bsize, bcount);
} else {
return ess_audio_prepare_for_output_audio1 (dev, bsize, bcount);
}
}
static void ess_audio_halt_xfer(int dev)
{
unsigned long flags;
sb_devc *devc = audio_devs[dev]->devc;
spin_lock_irqsave(&devc->lock, flags);
sb_dsp_reset(devc);
spin_unlock_irqrestore(&devc->lock, flags);
/*
* Audio 2 may still be operational! Creates awful sounds!
*/
if (devc->duplex) ess_chgmixer(devc, 0x78, 0x03, 0x00);
}
static void ess_audio_start_input
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
/*
* Start a DMA input to the buffer pointed by dmaqtail
*/
if (audio_devs[dev]->dmap_in->dma > 3) count >>= 1;
count--;
devc->irq_mode = IMODE_INPUT;
ess_write (devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
ess_write (devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_change (devc, 0xb8, 0x0f, 0x0f); /* Go */
devc->intr_active = 1;
}
static void ess_audio_output_block_audio1
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_OUTPUT;
ess_write (devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
ess_write (devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_change (devc, 0xb8, 0x05, 0x05); /* Go */
devc->intr_active = 1;
}
static void ess_audio_output_block_audio2
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
if (audio_devs[dev]->dmap_out->dma > 3) count >>= 1;
count--;
ess_setmixer (devc, 0x74, (unsigned char) ((unsigned short) c & 0xff));
ess_setmixer (devc, 0x76, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_chgmixer (devc, 0x78, 0x03, 0x03); /* Go */
devc->irq_mode_16 = IMODE_OUTPUT;
devc->intr_active_16 = 1;
}
static void ess_audio_output_block
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
if (devc->duplex) {
ess_audio_output_block_audio2 (dev, buf, nr_bytes, intrflag);
} else {
ess_audio_output_block_audio1 (dev, buf, nr_bytes, intrflag);
}
}
/*
* FKS: the if-statements for both bits and bits_16 are quite alike.
* Combine this...
*/
static void ess_audio_trigger(int dev, int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
int bits_16 = bits & devc->irq_mode_16;
bits &= devc->irq_mode;
if (!bits && !bits_16) {
/* FKS oh oh.... wrong?? for dma 16? */
sb_dsp_command(devc, 0xd0); /* Halt DMA */
}
if (bits) {
switch (devc->irq_mode)
{
case IMODE_INPUT:
ess_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
case IMODE_OUTPUT:
ess_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
}
}
if (bits_16) {
switch (devc->irq_mode_16) {
case IMODE_INPUT:
ess_audio_start_input(dev, devc->trg_buf_16, devc->trg_bytes_16,
devc->trg_intrflag_16);
break;
case IMODE_OUTPUT:
ess_audio_output_block(dev, devc->trg_buf_16, devc->trg_bytes_16,
devc->trg_intrflag_16);
break;
}
}
devc->trigger_bits = bits | bits_16;
}
static int ess_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
int minspeed, maxspeed, dummydiv;
if (speed > 0) {
minspeed = (devc->duplex ? 6215 : 5000 );
maxspeed = (devc->duplex ? 44100 : 48000);
if (speed < minspeed) speed = minspeed;
if (speed > maxspeed) speed = maxspeed;
ess_common_speed (devc, &speed, &dummydiv);
devc->speed = speed;
}
return devc->speed;
}
/*
* FKS: This is a one-on-one copy of sb1_audio_set_bits
*/
static unsigned int ess_audio_set_bits(int dev, unsigned int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
if (bits != 0) {
if (bits == AFMT_U8 || bits == AFMT_S16_LE) {
devc->bits = bits;
} else {
devc->bits = AFMT_U8;
}
}
return devc->bits;
}
/*
* FKS: This is a one-on-one copy of sbpro_audio_set_channels
* (*) Modified it!!
*/
static short ess_audio_set_channels(int dev, short channels)
{
sb_devc *devc = audio_devs[dev]->devc;
if (channels == 1 || channels == 2) devc->channels = channels;
return devc->channels;
}
static struct audio_driver ess_audio_driver = /* ESS ES688/1688 */
{
.owner = THIS_MODULE,
.open = sb_audio_open,
.close = sb_audio_close,
.output_block = ess_set_output_parms,
.start_input = ess_set_input_parms,
.prepare_for_input = ess_audio_prepare_for_input,
.prepare_for_output = ess_audio_prepare_for_output,
.halt_io = ess_audio_halt_xfer,
.trigger = ess_audio_trigger,
.set_speed = ess_audio_set_speed,
.set_bits = ess_audio_set_bits,
.set_channels = ess_audio_set_channels
};
/*
* ess_audio_init must be called from sb_audio_init
*/
struct audio_driver *ess_audio_init
(sb_devc *devc, int *audio_flags, int *format_mask)
{
*audio_flags = DMA_AUTOMODE;
*format_mask |= AFMT_S16_LE;
if (devc->duplex) {
int tmp_dma;
/*
* sb_audio_init thinks dma8 is for playback and
* dma16 is for record. Not now! So swap them.
*/
tmp_dma = devc->dma16;
devc->dma16 = devc->dma8;
devc->dma8 = tmp_dma;
*audio_flags |= DMA_DUPLEX;
}
return &ess_audio_driver;
}
/****************************************************************************
* *
* ESS common *
* *
****************************************************************************/
static void ess_handle_channel
(char *channel, int dev, int intr_active, unsigned char flag, int irq_mode)
{
if (!intr_active || !flag) return;
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: ess_handle_channel %s irq_mode=%d\n", channel, irq_mode);
#endif
switch (irq_mode) {
case IMODE_OUTPUT:
DMAbuf_outputintr (dev, 1);
break;
case IMODE_INPUT:
DMAbuf_inputintr (dev);
break;
case IMODE_INIT:
break;
default:;
/* printk(KERN_WARN "ESS: Unexpected interrupt\n"); */
}
}
/*
* FKS: TODO!!! Finish this!
*
* I think midi stuff uses uart401, without interrupts.
* So IMODE_MIDI isn't a value for devc->irq_mode.
*/
void ess_intr (sb_devc *devc)
{
int status;
unsigned char src;
if (devc->submodel == SUBMDL_ES1887) {
src = ess_getmixer (devc, 0x7f) >> 4;
} else {
src = 0xff;
}
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: sbintr src=%x\n",(int)src);
#endif
ess_handle_channel
( "Audio 1"
, devc->dev, devc->intr_active , src & 0x01, devc->irq_mode );
ess_handle_channel
( "Audio 2"
, devc->dev, devc->intr_active_16, src & 0x02, devc->irq_mode_16);
/*
* Acknowledge interrupts
*/
if (devc->submodel == SUBMDL_ES1887 && (src & 0x02)) {
ess_chgmixer (devc, 0x7a, 0x80, 0x00);
}
if (src & 0x01) {
status = inb(DSP_DATA_AVAIL);
}
}
static void ess_extended (sb_devc * devc)
{
/* Enable extended mode */
sb_dsp_command(devc, 0xc6);
}
static int ess_write (sb_devc * devc, unsigned char reg, unsigned char data)
{
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: write reg %x: %x\n", reg, data);
#endif
/* Write a byte to an extended mode register of ES1688 */
if (!sb_dsp_command(devc, reg))
return 0;
return sb_dsp_command(devc, data);
}
static int ess_read (sb_devc * devc, unsigned char reg)
{
/* Read a byte from an extended mode register of ES1688 */
/* Read register command */
if (!sb_dsp_command(devc, 0xc0)) return -1;
if (!sb_dsp_command(devc, reg )) return -1;
return sb_dsp_get_byte(devc);
}
int ess_dsp_reset(sb_devc * devc)
{
int loopc;
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: ess_dsp_reset 1\n");
ess_show_mixerregs (devc);
#endif
DEB(printk("Entered ess_dsp_reset()\n"));
outb(3, DSP_RESET); /* Reset FIFO too */
udelay(10);
outb(0, DSP_RESET);
udelay(30);
for (loopc = 0; loopc < 1000 && !(inb(DSP_DATA_AVAIL) & 0x80); loopc++);
if (inb(DSP_READ) != 0xAA) {
DDB(printk("sb: No response to RESET\n"));
return 0; /* Sorry */
}
ess_extended (devc);
DEB(printk("sb_dsp_reset() OK\n"));
#ifdef FKS_LOGGING
printk(KERN_INFO "FKS: dsp_reset 2\n");
ess_show_mixerregs (devc);
#endif
return 1;
}
static int ess_irq_bits (int irq)
{
switch (irq) {
case 2:
case 9:
return 0;
case 5:
return 1;
case 7:
return 2;
case 10:
return 3;
default:
printk(KERN_ERR "ESS1688: Invalid IRQ %d\n", irq);
return -1;
}
}
/*
* Set IRQ configuration register for all ESS models
*/
static int ess_common_set_irq_hw (sb_devc * devc)
{
int irq_bits;
if ((irq_bits = ess_irq_bits (devc->irq)) == -1) return 0;
if (!ess_write (devc, 0xb1, 0x50 | (irq_bits << 2))) {
printk(KERN_ERR "ES1688: Failed to write to IRQ config register\n");
return 0;
}
return 1;
}
/*
* I wanna use modern ES1887 mixer irq handling. Funny is the
* fact that my BIOS wants the same. But suppose someone's BIOS
* doesn't do this!
* This is independent of duplex. If there's a 1887 this will
* prevent it from going into 1888 mode.
*/
static void ess_es1887_set_irq_hw (sb_devc * devc)
{
int irq_bits;
if ((irq_bits = ess_irq_bits (devc->irq)) == -1) return;
ess_chgmixer (devc, 0x7f, 0x0f, 0x01 | ((irq_bits + 1) << 1));
}
static int ess_set_irq_hw (sb_devc * devc)
{
if (devc->submodel == SUBMDL_ES1887) ess_es1887_set_irq_hw (devc);
return ess_common_set_irq_hw (devc);
}
#ifdef FKS_TEST
/*
* FKS_test:
* for ES1887: 00, 18, non wr bits: 0001 1000
* for ES1868: 00, b8, non wr bits: 1011 1000
* for ES1888: 00, f8, non wr bits: 1111 1000
* for ES1688: 00, f8, non wr bits: 1111 1000
* + ES968
*/
static void FKS_test (sb_devc * devc)
{
int val1, val2;
val1 = ess_getmixer (devc, 0x64);
ess_setmixer (devc, 0x64, ~val1);
val2 = ess_getmixer (devc, 0x64) ^ ~val1;
ess_setmixer (devc, 0x64, val1);
val1 ^= ess_getmixer (devc, 0x64);
printk (KERN_INFO "FKS: FKS_test %02x, %02x\n", (val1 & 0x0ff), (val2 & 0x0ff));
};
#endif
static unsigned int ess_identify (sb_devc * devc)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&devc->lock, flags);
outb(((unsigned char) (0x40 & 0xff)), MIXER_ADDR);
udelay(20);
val = inb(MIXER_DATA) << 8;
udelay(20);
val |= inb(MIXER_DATA);
udelay(20);
spin_unlock_irqrestore(&devc->lock, flags);
return val;
}
/*
* ESS technology describes a detection scheme in their docs. It involves
* fiddling with the bits in certain mixer registers. ess_probe is supposed
* to help.
*