patch-2.3.24 linux/drivers/sound/nm256_audio.c
Next file: linux/drivers/sound/nm256_coeff.h
Previous file: linux/drivers/sound/nm256.h
Back to the patch index
Back to the overall index
- Lines: 1234
- Date:
Mon Oct 25 08:26:52 1999
- Orig file:
v2.3.23/linux/drivers/sound/nm256_audio.c
- Orig date:
Mon Oct 4 15:49:30 1999
diff -u --recursive --new-file v2.3.23/linux/drivers/sound/nm256_audio.c linux/drivers/sound/nm256_audio.c
@@ -1,27 +1,37 @@
-/* Audio driver for the NeoMagic 256AV and 256ZX chipsets in native
- mode, with AC97 mixer support.
-
- Overall design and parts of this code stolen from vidc_*.c and
- skeleton.c.
-
- Yeah, there are a lot of magic constants in here. You tell ME what
- they are. I just get this stuff psychically, remember?
-
- This driver was written by someone who wishes to remain anonymous.
- It is in the public domain, so share and enjoy. Try to make a profit
- off of it; go on, I dare you. */
+/*
+ * Audio driver for the NeoMagic 256AV and 256ZX chipsets in native
+ * mode, with AC97 mixer support.
+ *
+ * Overall design and parts of this code stolen from vidc_*.c and
+ * skeleton.c.
+ *
+ * Yeah, there are a lot of magic constants in here. You tell ME what
+ * they are. I just get this stuff psychically, remember?
+ *
+ * This driver was written by someone who wishes to remain anonymous.
+ * It is in the public domain, so share and enjoy. Try to make a profit
+ * off of it; go on, I dare you.
+ */
#include <linux/config.h>
#include <linux/pci.h>
#include <linux/module.h>
+#ifdef CONFIG_APM
+#include <linux/apm_bios.h>
+#endif
#include "sound_config.h"
#include "soundmodule.h"
#include "nm256.h"
#include "nm256_coeff.h"
int nm256_debug = 0;
+static int force_load = 0;
-/* The size of the playback reserve. */
+/*
+ * The size of the playback reserve. When the playback buffer has less
+ * than NM256_PLAY_WMARK_SIZE bytes to output, we request a new
+ * buffer.
+ */
#define NM256_PLAY_WMARK_SIZE 512
static struct audio_driver nm256_audio_driver;
@@ -29,16 +39,74 @@
static int nm256_grabInterrupt (struct nm256_info *card);
static int nm256_releaseInterrupt (struct nm256_info *card);
static void nm256_interrupt (int irq, void *dev_id, struct pt_regs *dummy);
-static void nm256_interrupt_zx (int irq, void *dev_id,
- struct pt_regs *dummy);
+static void nm256_interrupt_zx (int irq, void *dev_id, struct pt_regs *dummy);
/* These belong in linux/pci.h. */
#define PCI_DEVICE_ID_NEOMAGIC_NM256AV_AUDIO 0x8005
#define PCI_DEVICE_ID_NEOMAGIC_NM256ZX_AUDIO 0x8006
+/* eeeew. */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
+#define RSRCADDRESS(dev,num) ((dev)->resource[(num)].start)
+#else
+#define RSRCADDRESS(dev,num) ((dev)->base_address[(num)] \
+ & PCI_BASE_ADDRESS_MEM_MASK)
+
+#endif
+
/* List of cards. */
static struct nm256_info *nmcard_list;
+/* Release the mapped-in memory for CARD. */
+static void
+nm256_release_ports (struct nm256_info *card)
+{
+ int x;
+
+ for (x = 0; x < 2; x++) {
+ if (card->port[x].ptr != NULL) {
+ u32 size =
+ card->port[x].end_offset - card->port[x].start_offset;
+ release_region ((unsigned long) card->port[x].ptr, size);
+ card->port[x].ptr = NULL;
+ }
+ }
+}
+
+/*
+ * Map in the memory ports for CARD, if they aren't already mapped in
+ * and have been configured. If successful, a zero value is returned;
+ * otherwise any previously mapped-in areas are released and a non-zero
+ * value is returned.
+ *
+ * This is invoked twice, once for each port. Ideally it would only be
+ * called once, but we now need to map in the second port in order to
+ * check how much memory the card has on the 256ZX.
+ */
+static int
+nm256_remap_ports (struct nm256_info *card)
+{
+ int x;
+
+ for (x = 0; x < 2; x++) {
+ if (card->port[x].ptr == NULL && card->port[x].end_offset > 0) {
+ u32 physaddr
+ = card->port[x].physaddr + card->port[x].start_offset;
+ u32 size
+ = card->port[x].end_offset - card->port[x].start_offset;
+
+ card->port[x].ptr = ioremap_nocache (physaddr, size);
+
+ if (card->port[x].ptr == NULL) {
+ printk (KERN_ERR "NM256: Unable to remap port %d\n", x + 1);
+ nm256_release_ports (card);
+ return -1;
+ }
+ }
+ }
+ return 0;
+}
+
/* Locate the card in our list. */
static struct nm256_info *
nm256_find_card (int dev)
@@ -52,8 +120,10 @@
return NULL;
}
-/* Ditto, but find the card struct corresponding to the mixer device DEV
- instead. */
+/*
+ * Ditto, but find the card struct corresponding to the mixer device DEV
+ * instead.
+ */
static struct nm256_info *
nm256_find_card_for_mixer (int dev)
{
@@ -81,11 +151,13 @@
8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 99999999
};
-/* Set the card samplerate, word size and stereo mode to correspond to
- the settings in the CARD struct for the specified device in DEV.
- We keep two separate sets of information, one for each device; the
- hardware is not actually configured until a read or write is
- attempted. */
+/*
+ * Set the card samplerate, word size and stereo mode to correspond to
+ * the settings in the CARD struct for the specified device in DEV.
+ * We keep two separate sets of information, one for each device; the
+ * hardware is not actually configured until a read or write is
+ * attempted.
+ */
int
nm256_setInfo (int dev, struct nm256_info *card)
@@ -113,24 +185,33 @@
break;
if (x < 8) {
- u8 speedbits = ((x << 4) & NM_RATE_MASK)
- | (card->sinfo[w].bits == 16 ? NM_RATE_BITS_16: 0)
- | (card->sinfo[w].stereo ? NM_RATE_STEREO : 0);
+ u8 ratebits = ((x << 4) & NM_RATE_MASK);
+ if (card->sinfo[w].bits == 16)
+ ratebits |= NM_RATE_BITS_16;
+ if (card->sinfo[w].stereo)
+ ratebits |= NM_RATE_STEREO;
card->sinfo[w].samplerate = samplerates[x];
+
if (card->dev_for_play == dev && card->playing) {
+ if (nm256_debug)
+ printk (KERN_DEBUG "Setting play ratebits to 0x%x\n",
+ ratebits);
nm256_loadCoefficient (card, 0, x);
nm256_writePort8 (card, 2,
- NM_PLAYBACK_REG_OFFSET + NM_RATE_REG_OFFSET,
- speedbits);
+ NM_PLAYBACK_REG_OFFSET + NM_RATE_REG_OFFSET,
+ ratebits);
}
if (card->dev_for_record == dev && card->recording) {
+ if (nm256_debug)
+ printk (KERN_DEBUG "Setting record ratebits to 0x%x\n",
+ ratebits);
nm256_loadCoefficient (card, 1, x);
- nm256_writePort8 (card, 2,
- NM_RECORD_REG_OFFSET + NM_RATE_REG_OFFSET,
- speedbits);
+ nm256_writePort8 (card, 2,
+ NM_RECORD_REG_OFFSET + NM_RATE_REG_OFFSET,
+ ratebits);
}
return 0;
}
@@ -149,7 +230,7 @@
/* Enable playback engine and interrupts. */
nm256_writePort8 (card, 2, NM_PLAYBACK_ENABLE_REG,
- NM_PLAYBACK_ENABLE_FLAG | NM_PLAYBACK_FREERUN);
+ NM_PLAYBACK_ENABLE_FLAG | NM_PLAYBACK_FREERUN);
/* Enable both channels. */
nm256_writePort16 (card, 2, NM_AUDIO_MUTE_REG, 0x0);
@@ -157,9 +238,11 @@
}
}
-/* Request one chunk of AMT bytes from the recording device. When the
- operation is complete, the data will be copied into BUFFER and the
- function DMAbuf_inputintr will be invoked. */
+/*
+ * Request one chunk of AMT bytes from the recording device. When the
+ * operation is complete, the data will be copied into BUFFER and the
+ * function DMAbuf_inputintr will be invoked.
+ */
static void
nm256_startRecording (struct nm256_info *card, char *buffer, u32 amt)
@@ -167,11 +250,14 @@
u32 endpos;
int enableEngine = 0;
u32 ringsize = card->recordBufferSize;
+ unsigned long flags;
if (amt > (ringsize / 2)) {
- /* Of course this won't actually work right, because the
- caller is going to assume we will give what we got asked
- for. */
+ /*
+ * Of course this won't actually work right, because the
+ * caller is going to assume we will give what we got asked
+ * for.
+ */
printk (KERN_ERR "NM256: Read request too large: %d\n", amt);
amt = ringsize / 2;
}
@@ -181,8 +267,12 @@
return;
}
- /* If we're not currently recording, set up the start and end registers
- for the recording engine. */
+ save_flags (flags);
+ cli ();
+ /*
+ * If we're not currently recording, set up the start and end registers
+ * for the recording engine.
+ */
if (! card->recording) {
card->recording = 1;
if (nm256_grabInterrupt (card) == 0) {
@@ -198,10 +288,16 @@
}
else {
/* Not sure what else to do here. */
+ restore_flags (flags);
return;
}
}
+ /*
+ * If we happen to go past the end of the buffer a bit (due to a
+ * delayed interrupt) it's OK. So might as well set the watermark
+ * right at the end of the data we want.
+ */
endpos = card->abuf2 + ((card->curRecPos + amt) % ringsize);
card->recBuf = buffer;
@@ -211,6 +307,8 @@
if (enableEngine)
nm256_writePort8 (card, 2, NM_RECORD_ENABLE_REG,
NM_RECORD_ENABLE_FLAG | NM_RECORD_FREERUN);
+
+ restore_flags (flags);
}
/* Stop the play engine. */
@@ -219,7 +317,7 @@
{
/* Shut off sound from both channels. */
nm256_writePort16 (card, 2, NM_AUDIO_MUTE_REG,
- NM_AUDIO_MUTE_LEFT | NM_AUDIO_MUTE_RIGHT);
+ NM_AUDIO_MUTE_LEFT | NM_AUDIO_MUTE_RIGHT);
/* Disable play engine. */
nm256_writePort8 (card, 2, NM_PLAYBACK_ENABLE_REG, 0);
if (card->playing) {
@@ -246,18 +344,22 @@
}
}
-/* Ring buffers, man. That's where the hip-hop, wild-n-wooly action's at.
- 1972?
-
- Write AMT bytes of BUFFER to the playback ring buffer, and start the
- playback engine running. It will only accept up to 1/2 of the total
- size of the ring buffer. */
+/*
+ * Ring buffers, man. That's where the hip-hop, wild-n-wooly action's at.
+ * 1972? (Well, I suppose it was cheep-n-easy to implement.)
+ *
+ * Write AMT bytes of BUFFER to the playback ring buffer, and start the
+ * playback engine running. It will only accept up to 1/2 of the total
+ * size of the ring buffer. No check is made that we're about to overwrite
+ * the currently-playing sample.
+ */
static void
nm256_write_block (struct nm256_info *card, char *buffer, u32 amt)
{
u32 ringsize = card->playbackBufferSize;
u32 endstop;
+ unsigned long flags;
if (amt > (ringsize / 2)) {
printk (KERN_ERR "NM256: Write request too large: %d\n", amt);
@@ -273,6 +375,9 @@
card->requested_amt = amt;
+ save_flags (flags);
+ cli ();
+
if ((card->curPlayPos + amt) >= ringsize) {
u32 rem = ringsize - card->curPlayPos;
@@ -288,33 +393,40 @@
card->abuf1 + card->curPlayPos,
amt);
- /* Setup the start-n-stop-n-limit registers, and start that engine
- goin'.
-
- Normally we just let it wrap around to avoid the click-click
- action scene. */
+ /*
+ * Setup the start-n-stop-n-limit registers, and start that engine
+ * goin'.
+ *
+ * Normally we just let it wrap around to avoid the click-click
+ * action scene.
+ */
if (! card->playing) {
- /* The PBUFFER_END register in this case points to one "word"
+ /* The PBUFFER_END register in this case points to one sample
before the end of the buffer. */
int w = (card->dev_for_play == card->dev[0] ? 0 : 1);
- int wordsize = (card->sinfo[w].bits == 16 ? 2 : 1)
- * (card->sinfo[w].stereo ? 2 : 1);
+ int sampsize = (card->sinfo[w].bits == 16 ? 2 : 1);
+
+ if (card->sinfo[w].stereo)
+ sampsize *= 2;
/* Need to set the not-normally-changing-registers up. */
nm256_writePort32 (card, 2, NM_PBUFFER_START,
card->abuf1 + card->curPlayPos);
nm256_writePort32 (card, 2, NM_PBUFFER_END,
- card->abuf1 + ringsize - wordsize);
+ card->abuf1 + ringsize - sampsize);
nm256_writePort32 (card, 2, NM_PBUFFER_CURRP,
card->abuf1 + card->curPlayPos);
}
endstop = (card->curPlayPos + amt - NM256_PLAY_WMARK_SIZE) % ringsize;
nm256_writePort32 (card, 2, NM_PBUFFER_WMARK, card->abuf1 + endstop);
+
if (! card->playing)
startPlay (card);
+
+ restore_flags (flags);
}
-/* We just got a card playback interrupt; process it. */
+/* We just got a card playback interrupt; process it. */
static void
nm256_get_new_block (struct nm256_info *card)
{
@@ -332,13 +444,14 @@
amt -= card->curPlayPos;
if (card->requested_amt > (amt + NM256_PLAY_WMARK_SIZE)) {
- u32 endstop =
+ u32 endstop =
card->curPlayPos + card->requested_amt - NM256_PLAY_WMARK_SIZE;
nm256_writePort32 (card, 2, NM_PBUFFER_WMARK, card->abuf1 + endstop);
- } else {
+ }
+ else {
card->curPlayPos += card->requested_amt;
/* Get a new block to write. This will eventually invoke
- nm256_write_block (). */
+ nm256_write_block () or stopPlay (). */
DMAbuf_outputintr (card->dev_for_play, 1);
}
}
@@ -346,9 +459,11 @@
/* Ultra cheez-whiz. But I'm too lazy to grep headers. */
#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
-/* Read the last-recorded block from the ring buffer, copy it into the
- saved buffer pointer, and invoke DMAuf_inputintr() with the recording
- device. */
+/*
+ * Read the last-recorded block from the ring buffer, copy it into the
+ * saved buffer pointer, and invoke DMAuf_inputintr() with the recording
+ * device.
+ */
static void
nm256_read_block (struct nm256_info *card)
@@ -363,8 +478,10 @@
currptr = 0;
}
- /* This test is probably redundant; we shouldn't be here unless
- it's true. */
+ /*
+ * This test is probably redundant; we shouldn't be here unless
+ * it's true.
+ */
if (card->recording) {
/* If we wrapped around, copy everything from the start of our
recording buffer to the end of the buffer. */
@@ -394,52 +511,28 @@
}
#undef MIN
-/* Initialize the hardware and various other card data we'll need
- later. */
+/*
+ * Initialize the hardware.
+ */
static void
nm256_initHw (struct nm256_info *card)
{
- int x;
-
- card->playbackBufferSize = 16384;
- card->recordBufferSize = 16384;
-
- card->coeffBuf = card->bufend - NM_MAX_COEFFICIENT;
- card->abuf2 = card->coeffBuf - card->recordBufferSize;
- card->abuf1 = card->abuf2 - card->playbackBufferSize;
- card->allCoeffBuf = card->abuf2 - (NM_TOTAL_COEFF_COUNT * 4);
-
- /* Fixed setting. */
- card->mixer = NM_MIXER_BASE;
-
- card->playing = 0;
- card->is_open_play = 0;
- card->curPlayPos = 0;
-
- card->recording = 0;
- card->is_open_record = 0;
- card->curRecPos = 0;
-
- card->coeffsCurrent = 0;
-
- card->opencnt[0] = 0; card->opencnt[1] = 0;
-
/* Reset everything. */
- nm256_writePort8 (card, 2, 0, 0x11);
-
- /* Disable recording. */
- nm256_writePort8 (card, 2, NM_RECORD_ENABLE_REG, 0);
+ nm256_writePort8 (card, 2, 0x0, 0x11);
nm256_writePort16 (card, 2, 0x214, 0);
- /* Reasonable default settings, but largely unnecessary. */
- for (x = 0; x < 2; x++) {
- card->sinfo[x].bits = 8;
- card->sinfo[x].stereo = 0;
- card->sinfo[x].samplerate = 8000;
- }
+ stopRecord (card);
+ stopPlay (card);
}
-/* Handle a potential interrupt for the device referred to by DEV_ID. */
+/*
+ * Handle a potential interrupt for the device referred to by DEV_ID.
+ *
+ * I don't like the cut-n-paste job here either between the two routines,
+ * but there are sufficient differences between the two interrupt handlers
+ * that parameterizing it isn't all that great either. (Could use a macro,
+ * I suppose...yucky bleah.)
+ */
static void
nm256_interrupt (int irq, void *dev_id, struct pt_regs *dummy)
@@ -458,14 +551,32 @@
/* Not ours. */
if (status == 0) {
if (badintrcount++ > 1000) {
- printk (KERN_ERR "NM256: Releasing interrupt, over 1000 invalid interrupts\n");
- nm256_releaseInterrupt (card);
+ /*
+ * I'm not sure if the best thing is to stop the card from
+ * playing or just release the interrupt (after all, we're in
+ * a bad situation, so doing fancy stuff may not be such a good
+ * idea).
+ *
+ * I worry about the card engine continuing to play noise
+ * over and over, however--that could become a very
+ * obnoxious problem. And we know that when this usually
+ * happens things are fairly safe, it just means the user's
+ * inserted a PCMCIA card and someone's spamming us with IRQ 9s.
+ */
+
+ if (card->playing)
+ stopPlay (card);
+ if (card->recording)
+ stopRecord (card);
+ badintrcount = 0;
}
return;
}
badintrcount = 0;
+ /* Rather boring; check for individual interrupts and process them. */
+
if (status & NM_PLAYBACK_INT) {
status &= ~NM_PLAYBACK_INT;
NM_ACK_INT (card, NM_PLAYBACK_INT);
@@ -503,6 +614,7 @@
nm256_writePort8 (card, 2, 0x400, cbyte & ~2);
}
+ /* Unknown interrupt. */
if (status) {
printk (KERN_ERR "NM256: Fire in the hole! Unknown status 0x%x\n",
status);
@@ -511,8 +623,11 @@
}
}
-/* Handle a potential interrupt for the device referred to by DEV_ID.
- This handler is for the 256ZX. */
+/*
+ * Handle a potential interrupt for the device referred to by DEV_ID.
+ * This handler is for the 256ZX, and is very similar to the non-ZX
+ * routine.
+ */
static void
nm256_interrupt_zx (int irq, void *dev_id, struct pt_regs *dummy)
@@ -532,13 +647,33 @@
if (status == 0) {
if (badintrcount++ > 1000) {
printk (KERN_ERR "NM256: Releasing interrupt, over 1000 invalid interrupts\n");
- nm256_releaseInterrupt (card);
+ /*
+ * I'm not sure if the best thing is to stop the card from
+ * playing or just release the interrupt (after all, we're in
+ * a bad situation, so doing fancy stuff may not be such a good
+ * idea).
+ *
+ * I worry about the card engine continuing to play noise
+ * over and over, however--that could become a very
+ * obnoxious problem. And we know that when this usually
+ * happens things are fairly safe, it just means the user's
+ * inserted a PCMCIA card and someone's spamming us with
+ * IRQ 9s.
+ */
+
+ if (card->playing)
+ stopPlay (card);
+ if (card->recording)
+ stopRecord (card);
+ badintrcount = 0;
}
return;
}
badintrcount = 0;
+ /* Rather boring; check for individual interrupts and process them. */
+
if (status & NM2_PLAYBACK_INT) {
status &= ~NM2_PLAYBACK_INT;
NM2_ACK_INT (card, NM2_PLAYBACK_INT);
@@ -575,6 +710,7 @@
nm256_writePort8 (card, 2, 0x400, cbyte & ~2);
}
+ /* Unknown interrupt. */
if (status) {
printk (KERN_ERR "NM256: Fire in the hole! Unknown status 0x%x\n",
status);
@@ -583,7 +719,9 @@
}
}
-/* Request our interrupt. */
+/*
+ * Request our interrupt.
+ */
static int
nm256_grabInterrupt (struct nm256_info *card)
{
@@ -597,7 +735,9 @@
return 0;
}
-/* Release our interrupt. */
+/*
+ * Release our interrupt.
+ */
static int
nm256_releaseInterrupt (struct nm256_info *card)
{
@@ -612,6 +752,11 @@
return 0;
}
+/*
+ * Waits for the mixer to become ready to be written; returns a zero value
+ * if it timed out.
+ */
+
static int
nm256_isReady (struct ac97_hwint *dev)
{
@@ -626,26 +771,25 @@
return 0;
}
- if (card->rev == REV_NM256AV) {
- testaddr = 0xa06;
- testb = 0x0100;
- } else if (card->rev == REV_NM256ZX) {
- testaddr = 0xa08;
- testb = 0x0800;
- } else {
- return -1;
- }
+ testaddr = card->mixer_status_offset;
+ testb = card->mixer_status_mask;
- while (t2-- > 0) {
- if ((nm256_readPort16 (card, 2, testaddr) & testb) == 0) {
+ /*
+ * Loop around waiting for the mixer to become ready.
+ */
+ while (! done && t2-- > 0) {
+ if ((nm256_readPort16 (card, 2, testaddr) & testb) == 0)
done = 1;
- break;
- }
- udelay (100);
+ else
+ udelay (100);
}
return done;
}
+/*
+ * Return the contents of the AC97 mixer register REG. Returns a positive
+ * value if successful, or a negative error code.
+ */
static int
nm256_readAC97Reg (struct ac97_hwint *dev, u8 reg)
{
@@ -661,6 +805,7 @@
nm256_isReady (dev);
res = nm256_readPort16 (card, 2, card->mixer + reg);
+ /* Magic delay. Bleah yucky. */
udelay (1000);
return res;
}
@@ -668,6 +813,10 @@
return -EINVAL;
}
+/*
+ * Writes VALUE to AC97 mixer register REG. Returns 0 if successful, or
+ * a negative error code.
+ */
static int
nm256_writeAC97Reg (struct ac97_hwint *dev, u8 reg, u16 value)
{
@@ -706,6 +855,13 @@
return ! done;
}
+/*
+ * Initial register values to be written to the AC97 mixer.
+ * While most of these are identical to the reset values, we do this
+ * so that we have most of the register contents cached--this avoids
+ * reading from the mixer directly (which seems to be problematic,
+ * probably due to ignorance).
+ */
struct initialValues
{
unsigned short port;
@@ -714,23 +870,24 @@
static struct initialValues nm256_ac97_initial_values[] =
{
- { 0x0002, 0x8000 },
- { 0x0004, 0x0000 },
- { 0x0006, 0x0000 },
- { 0x000A, 0x0000 },
- { 0x000C, 0x0008 },
- { 0x000E, 0x8008 },
- { 0x0010, 0x8808 },
- { 0x0012, 0x8808 },
- { 0x0014, 0x8808 },
- { 0x0016, 0x8808 },
- { 0x0018, 0x0808 },
- { 0x001A, 0x0000 },
- { 0x001C, 0x0B0B },
- { 0x0020, 0x0000 },
+ { AC97_MASTER_VOL_STEREO, 0x8000 },
+ { AC97_HEADPHONE_VOL, 0x8000 },
+ { AC97_MASTER_VOL_MONO, 0x0000 },
+ { AC97_PCBEEP_VOL, 0x0000 },
+ { AC97_PHONE_VOL, 0x0008 },
+ { AC97_MIC_VOL, 0x8000 },
+ { AC97_LINEIN_VOL, 0x8808 },
+ { AC97_CD_VOL, 0x8808 },
+ { AC97_VIDEO_VOL, 0x8808 },
+ { AC97_AUX_VOL, 0x8808 },
+ { AC97_PCMOUT_VOL, 0x0808 },
+ { AC97_RECORD_SELECT, 0x0000 },
+ { AC97_RECORD_GAIN, 0x0B0B },
+ { AC97_GENERAL_PURPOSE, 0x0000 },
{ 0xffff, 0xffff }
};
+/* Initialize the AC97 into a known state. */
static int
nm256_resetAC97 (struct ac97_hwint *dev)
{
@@ -742,22 +899,28 @@
return -EINVAL;
}
- /* Reset the card. 'Tis magic! */
+ /* Reset the mixer. 'Tis magic! */
nm256_writePort8 (card, 2, 0x6c0, 1);
nm256_writePort8 (card, 2, 0x6cc, 0x87);
nm256_writePort8 (card, 2, 0x6cc, 0x80);
nm256_writePort8 (card, 2, 0x6cc, 0x0);
- for (x = 0; nm256_ac97_initial_values[x].port != 0xffff; x++) {
- ac97_put_register (dev,
- nm256_ac97_initial_values[x].port,
- nm256_ac97_initial_values[x].value);
+ if (! card->mixer_values_init) {
+ for (x = 0; nm256_ac97_initial_values[x].port != 0xffff; x++) {
+ ac97_put_register (dev,
+ nm256_ac97_initial_values[x].port,
+ nm256_ac97_initial_values[x].value);
+ card->mixer_values_init = 1;
+ }
}
return 0;
}
-/* We don't do anything special here. */
+/*
+ * We don't do anything particularly special here; it just passes the
+ * mixer ioctl to the AC97 driver.
+ */
static int
nm256_default_mixer_ioctl (int dev, unsigned int cmd, caddr_t arg)
{
@@ -774,7 +937,12 @@
nm256_default_mixer_ioctl
};
-/* I "love" C sometimes. Got braces? */
+/*
+ * Default settings for the OSS mixer. These are set last, after the
+ * mixer is initialized.
+ *
+ * I "love" C sometimes. Got braces?
+ */
static struct ac97_mixer_value_list mixer_defaults[] = {
{ SOUND_MIXER_VOLUME, { { 85, 85 } } },
{ SOUND_MIXER_SPEAKER, { { 100 } } },
@@ -783,6 +951,8 @@
{ -1, { { 0, 0 } } }
};
+
+/* Installs the AC97 mixer into CARD. */
static int
nm256_install_mixer (struct nm256_info *card)
{
@@ -812,36 +982,67 @@
return 0;
}
-/* See if the signature left by the NM256 BIOS is intact; if so, we use
- the associated address as the end of our buffer. */
+/* Perform a full reset on the hardware; this is invoked when an APM
+ resume event occurs. */
+static void
+nm256_full_reset (struct nm256_info *card)
+{
+ nm256_initHw (card);
+ ac97_reset (&(card->mdev));
+}
+
+/*
+ * See if the signature left by the NM256 BIOS is intact; if so, we use
+ * the associated address as the end of our audio buffer in the video
+ * RAM.
+ */
+
static void
-nm256_peek_for_sig (struct nm256_info *card, u32 port1addr)
+nm256_peek_for_sig (struct nm256_info *card)
{
- char *temp = ioremap_nocache (port1addr + card->port1_end - 0x0400, 16);
+ u32 port1offset
+ = card->port[0].physaddr + card->port[0].end_offset - 0x0400;
+ /* The signature is located 1K below the end of video RAM. */
+ char *temp = ioremap_nocache (port1offset, 16);
+ /* Default buffer end is 5120 bytes below the top of RAM. */
+ u32 default_value = card->port[0].end_offset - 0x1400;
u32 sig;
+ /* Install the default value first, so we don't have to repeatedly
+ do it if there is a problem. */
+ card->port[0].end_offset = default_value;
+
if (temp == NULL) {
printk (KERN_ERR "NM256: Unable to scan for card signature in video RAM\n");
return;
}
- memcpy_fromio (&sig, temp, sizeof (u32));
- if ((sig & 0xffff0000) == 0x4e4d0000) {
- memcpy_fromio (&(card->bufend), temp + 4, sizeof (u32));
+ sig = readl (temp);
+ if ((sig & NM_SIG_MASK) == NM_SIGNATURE) {
+ u32 pointer = readl (temp + 4);
+
+ /*
+ * If it's obviously invalid, don't use it (the port already has a
+ * suitable default value set).
+ */
+ if (pointer != 0xffffffff)
+ card->port[0].end_offset = pointer;
+
printk (KERN_INFO "NM256: Found card signature in video RAM: 0x%x\n",
- card->bufend);
+ pointer);
}
release_region ((unsigned long) temp, 16);
}
-/* Install a driver for the soundcard referenced by PCIDEV. */
+/*
+ * Install a driver for the PCI device referenced by PCIDEV.
+ * VERSTR is a human-readable version string.
+ */
static int
nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr)
{
struct nm256_info *card;
- u32 port1addr = pcidev->resource[0].start;
- u32 port2addr = pcidev->resource[1].start;
int x;
card = kmalloc (sizeof (struct nm256_info), GFP_KERNEL);
@@ -855,52 +1056,85 @@
card->recording = 0;
card->rev = rev;
- /* The NM256 has two memory ports. The first port is nothing
- more than a chunk of video RAM, which is used as the I/O ring
- buffer. The second port has the actual juicy stuff (like the
- mixer and the playback engine control registers). */
-
- card->ports[1] = ioremap_nocache (port2addr, NM_PORT2_SIZE);
+ /* Init the memory port info. */
+ for (x = 0; x < 2; x++) {
+ card->port[x].physaddr = RSRCADDRESS (pcidev, x);
+ card->port[x].ptr = NULL;
+ card->port[x].start_offset = 0;
+ card->port[x].end_offset = 0;
+ }
- if (card->ports[1] == NULL) {
- printk (KERN_ERR "NM256: Unable to remap port 2\n");
+ /* Port 2 is easy. */
+ card->port[1].start_offset = 0;
+ card->port[1].end_offset = NM_PORT2_SIZE;
+
+ /* Yuck. But we have to map in port 2 so we can check how much RAM the
+ card has. */
+ if (nm256_remap_ports (card)) {
kfree_s (card, sizeof (struct nm256_info));
return 0;
}
+ /*
+ * The NM256 has two memory ports. The first port is nothing
+ * more than a chunk of video RAM, which is used as the I/O ring
+ * buffer. The second port has the actual juicy stuff (like the
+ * mixer and the playback engine control registers).
+ */
+
if (card->rev == REV_NM256AV) {
- card->port1_end = 2560 * 1024;
+ /* Ok, try to see if this is a non-AC97 version of the hardware. */
+ int pval = nm256_readPort16 (card, 2, NM_MIXER_PRESENCE);
+ if ((pval & NM_PRESENCE_MASK) != NM_PRESENCE_VALUE) {
+ if (! force_load) {
+ printk (KERN_ERR "NM256: This doesn't look to me like the AC97-compatible version.\n");
+ printk (KERN_ERR " You can force the driver to load by passing in the module\n");
+ printk (KERN_ERR " parameter:\n");
+ printk (KERN_ERR " force_ac97 = 1\n");
+ printk (KERN_ERR "\n");
+ printk (KERN_ERR " More likely, you should be using the appropriate SB-16 or\n");
+ printk (KERN_ERR " CS4232 driver instead. (If your BIOS has settings for\n");
+ printk (KERN_ERR " IRQ and/or DMA for the sound card, this is *not* the correct\n");
+ printk (KERN_ERR " driver to use.)\n");
+ nm256_release_ports (card);
+ kfree_s (card, sizeof (struct nm256_info));
+ return 0;
+ }
+ else {
+ printk (KERN_INFO "NM256: Forcing driver load as per user request.\n");
+ }
+ }
+ else {
+ /* printk (KERN_INFO "NM256: Congratulations. You're not running Eunice.\n")*/;
+ }
+ card->port[0].end_offset = 2560 * 1024;
card->introutine = nm256_interrupt;
+ card->mixer_status_offset = NM_MIXER_STATUS_OFFSET;
+ card->mixer_status_mask = NM_MIXER_READY_MASK;
}
else {
+ /* Not sure if there is any relevant detect for the ZX or not. */
if (nm256_readPort8 (card, 2, 0xa0b) != 0)
- card->port1_end = 6144 * 1024;
+ card->port[0].end_offset = 6144 * 1024;
else
- card->port1_end = 4096 * 1024;
+ card->port[0].end_offset = 4096 * 1024;
card->introutine = nm256_interrupt_zx;
+ card->mixer_status_offset = NM2_MIXER_STATUS_OFFSET;
+ card->mixer_status_mask = NM2_MIXER_READY_MASK;
}
- /* Default value. */
- card->bufend = card->port1_end - 0x1400;
-
- if (buffertop >= 98304 && buffertop < card->port1_end)
- card->bufend = buffertop;
+ if (buffertop >= 98304 && buffertop < card->port[0].end_offset)
+ card->port[0].end_offset = buffertop;
else
- nm256_peek_for_sig (card, port1addr);
+ nm256_peek_for_sig (card);
- card->port1_start = card->bufend - 98304;
+ card->port[0].start_offset = card->port[0].end_offset - 98304;
printk (KERN_INFO "NM256: Mapping port 1 from 0x%x - 0x%x\n",
- card->port1_start, card->port1_end);
+ card->port[0].start_offset, card->port[0].end_offset);
- card->ports[0] =
- ioremap_nocache (port1addr + card->port1_start,
- card->port1_end - card->port1_start);
-
- if (card->ports[0] == NULL) {
- printk (KERN_ERR "NM256: Unable to remap port 1\n");
- release_region ((unsigned long) card->ports[1], NM_PORT2_SIZE);
+ if (nm256_remap_ports (card)) {
kfree_s (card, sizeof (struct nm256_info));
return 0;
}
@@ -911,9 +1145,7 @@
card->has_irq = 0;
if (nm256_grabInterrupt (card) != 0) {
- release_region ((unsigned long) card->ports[0],
- card->port1_end - card->port1_start);
- release_region ((unsigned long) card->ports[1], NM_PORT2_SIZE);
+ nm256_release_ports (card);
kfree_s (card, sizeof (struct nm256_info));
return 0;
}
@@ -924,10 +1156,36 @@
* Init the board.
*/
+ card->playbackBufferSize = 16384;
+ card->recordBufferSize = 16384;
+
+ card->coeffBuf = card->port[0].end_offset - NM_MAX_COEFFICIENT;
+ card->abuf2 = card->coeffBuf - card->recordBufferSize;
+ card->abuf1 = card->abuf2 - card->playbackBufferSize;
+ card->allCoeffBuf = card->abuf2 - (NM_TOTAL_COEFF_COUNT * 4);
+
+ /* Fixed setting. */
+ card->mixer = NM_MIXER_OFFSET;
+ card->mixer_values_init = 0;
+
+ card->is_open_play = 0;
+ card->is_open_record = 0;
+
+ card->coeffsCurrent = 0;
+
+ card->opencnt[0] = 0; card->opencnt[1] = 0;
+
+ /* Reasonable default settings, but largely unnecessary. */
+ for (x = 0; x < 2; x++) {
+ card->sinfo[x].bits = 8;
+ card->sinfo[x].stereo = 0;
+ card->sinfo[x].samplerate = 8000;
+ }
+
nm256_initHw (card);
for (x = 0; x < 2; x++) {
- if ((card->dev[x] =
+ if ((card->dev[x] =
sound_install_audiodrv(AUDIO_DRIVER_VERSION,
"NM256", &nm256_audio_driver,
sizeof(struct audio_driver),
@@ -940,9 +1198,7 @@
}
else {
printk(KERN_ERR "NM256: Too many PCM devices available\n");
- release_region ((unsigned long) card->ports[0],
- card->port1_end - card->port1_start);
- release_region ((unsigned long) card->ports[1], NM_PORT2_SIZE);
+ nm256_release_ports (card);
kfree_s (card, sizeof (struct nm256_info));
return 0;
}
@@ -964,6 +1220,48 @@
return 1;
}
+
+#ifdef CONFIG_APM
+/*
+ * APM event handler, so the card is properly reinitialized after a power
+ * event.
+ */
+static int
+handle_apm_event (apm_event_t event)
+{
+ static int down = 0;
+
+ switch (event)
+ {
+ case APM_SYS_SUSPEND:
+ case APM_USER_SUSPEND:
+ down++;
+ break;
+ case APM_NORMAL_RESUME:
+ case APM_CRITICAL_RESUME:
+ if (down)
+ {
+ struct nm256_info *crd;
+
+ down = 0;
+ for (crd = nmcard_list; crd != NULL; crd = crd->next_card)
+ {
+ int playing = crd->playing;
+ nm256_full_reset (crd);
+ /*
+ * A little ugly, but that's ok; pretend the
+ * block we were playing is done.
+ */
+ if (playing)
+ DMAbuf_outputintr (crd->dev_for_play, 1);
+ }
+ }
+ break;
+ }
+ return 0;
+}
+#endif
+
/*
* This loop walks the PCI configuration database and finds where
* the sound cards are.
@@ -993,6 +1291,10 @@
if (count == 0)
return -ENODEV;
+#ifdef CONFIG_APM
+ apm_register_callback (&handle_apm_event);
+#endif
+
printk (KERN_INFO "Done installing NM256 audio driver.\n");
return 0;
}
@@ -1028,10 +1330,13 @@
if (! ((mode & OPEN_READ) || (mode & OPEN_WRITE)))
return -EIO;
- /* If it's open for both read and write, and the card's currently
- being read or written to, then do the opposite of what has
- already been done. Otherwise, don't specify any mode until the
- user actually tries to do I/O. */
+ /*
+ * If it's open for both read and write, and the card's currently
+ * being read or written to, then do the opposite of what has
+ * already been done. Otherwise, don't specify any mode until the
+ * user actually tries to do I/O. (Some programs open the device
+ * for both read and write, but only actually do reading or writing.)
+ */
if ((mode & OPEN_WRITE) && (mode & OPEN_READ)) {
if (card->is_open_play)
@@ -1105,6 +1410,7 @@
}
}
+/* Standard ioctl handler. */
static int
nm256_audio_ioctl(int dev, unsigned int cmd, caddr_t arg)
{
@@ -1122,6 +1428,11 @@
else
w = 1;
+ /*
+ * The code here is messy. There are probably better ways to do
+ * it. (It should be possible to handle it the same way the AC97 mixer
+ * is done.)
+ */
switch (cmd)
{
case SOUND_PCM_WRITE_RATE:
@@ -1193,8 +1504,12 @@
return put_user(ret, (int *) arg);
}
-/* Given the dev DEV and an associated physical buffer PHYSBUF, return
- a pointer to the actual buffer in kernel space. */
+/*
+ * Given the sound device DEV and an associated physical buffer PHYSBUF,
+ * return a pointer to the actual buffer in kernel space.
+ *
+ * This routine should exist as part of the soundcore routines.
+ */
static char *
nm256_getDMAbuffer (int dev, unsigned long physbuf)
@@ -1238,9 +1553,10 @@
}
}
+/* Ditto, but do recording instead. */
static void
nm256_audio_start_input(int dev, unsigned long physbuf, int count,
- int intrflag)
+ int intrflag)
{
struct nm256_info *card = nm256_find_card (dev);
@@ -1252,6 +1568,12 @@
}
}
+/*
+ * Prepare for inputting samples to DEV.
+ * Each requested buffer will be BSIZE byes long, with a total of
+ * BCOUNT buffers.
+ */
+
static int
nm256_audio_prepare_for_input(int dev, int bsize, int bcount)
{
@@ -1278,6 +1600,7 @@
* 2. We get a write buffer without dma_mode setup (dmabuf.c:1152)
* 3. We restart a transfer (dmabuf.c:1324)
*/
+
static int
nm256_audio_prepare_for_output(int dev, int bsize, int bcount)
{
@@ -1342,12 +1665,13 @@
MODULE_PARM (usecache, "i");
MODULE_PARM (buffertop, "i");
MODULE_PARM (nm256_debug, "i");
+MODULE_PARM (force_load, "i");
int
init_module (void)
{
nmcard_list = NULL;
- printk (KERN_INFO "NeoMagic 256AV/256ZX audio driver, version 1.0\n");
+ printk (KERN_INFO "NeoMagic 256AV/256ZX audio driver, version 1.1\n");
if (init_nm256 () == 0) {
SOUND_LOCK;
@@ -1372,9 +1696,7 @@
stopRecord (card);
if (card->has_irq)
free_irq (card->irq, card);
- release_region ((unsigned long) card->ports[0],
- card->port1_end - card->port1_start);
- release_region ((unsigned long) card->ports[1], NM_PORT2_SIZE);
+ nm256_release_ports (card);
sound_unload_mixerdev (card->mixer_oss_dev);
sound_unload_audiodev (card->dev[0]);
sound_unload_audiodev (card->dev[1]);
@@ -1383,6 +1705,9 @@
}
nmcard_list = NULL;
}
+#ifdef CONFIG_APM
+ apm_unregister_callback (&handle_apm_event);
+#endif
}
#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)