diff options
Diffstat (limited to 'sound/oss/nm256_audio.c')
| -rw-r--r-- | sound/oss/nm256_audio.c | 1662 |
1 files changed, 0 insertions, 1662 deletions
diff --git a/sound/oss/nm256_audio.c b/sound/oss/nm256_audio.c deleted file mode 100644 index 44cd1550500..00000000000 --- a/sound/oss/nm256_audio.c +++ /dev/null @@ -1,1662 +0,0 @@ -/* - * 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. - * - * Changes: - * 11-10-2000 Bartlomiej Zolnierkiewicz <bkz@linux-ide.org> - * Added some __init - * 19-04-2001 Marcus Meissner <mm@caldera.de> - * Ported to 2.4 PCI API. - */ - -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/spinlock.h> -#include "sound_config.h" - -static int nm256_debug; -static int force_load; - -#include "nm256.h" -#include "nm256_coeff.h" - -/* - * 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; - -static int nm256_grabInterrupt (struct nm256_info *card); -static int nm256_releaseInterrupt (struct nm256_info *card); -static irqreturn_t nm256_interrupt (int irq, void *dev_id); -static irqreturn_t nm256_interrupt_zx (int irq, void *dev_id); - -/* These belong in linux/pci.h. */ -#define PCI_DEVICE_ID_NEOMAGIC_NM256AV_AUDIO 0x8005 -#define PCI_DEVICE_ID_NEOMAGIC_NM256ZX_AUDIO 0x8006 -#define PCI_DEVICE_ID_NEOMAGIC_NM256XL_PLUS_AUDIO 0x8016 - -/* 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) { - iounmap (card->port[x].ptr); - 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) -{ - struct nm256_info *card; - - for (card = nmcard_list; card != NULL; card = card->next_card) - if (card->dev[0] == dev || card->dev[1] == dev) - return card; - - return NULL; -} - -/* - * Ditto, but find the card struct corresponding to the mixer device DEV - * instead. - */ -static struct nm256_info * -nm256_find_card_for_mixer (int dev) -{ - struct nm256_info *card; - - for (card = nmcard_list; card != NULL; card = card->next_card) - if (card->mixer_oss_dev == dev) - return card; - - return NULL; -} - -static int usecache; -static int buffertop; - -/* Check to see if we're using the bank of cached coefficients. */ -static int -nm256_cachedCoefficients (struct nm256_info *card) -{ - return usecache; -} - -/* The actual rates supported by the card. */ -static int samplerates[9] = { - 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. - */ - -static int -nm256_setInfo (int dev, struct nm256_info *card) -{ - int x; - int w; - int targetrate; - - if (card->dev[0] == dev) - w = 0; - else if (card->dev[1] == dev) - w = 1; - else - return -ENODEV; - - targetrate = card->sinfo[w].samplerate; - - if ((card->sinfo[w].bits != 8 && card->sinfo[w].bits != 16) - || targetrate < samplerates[0] - || targetrate > samplerates[7]) - return -EINVAL; - - for (x = 0; x < 8; x++) - if (targetrate < ((samplerates[x] + samplerates[x + 1]) / 2)) - break; - - if (x < 8) { - 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, - 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, - ratebits); - } - return 0; - } - else - return -EINVAL; -} - -/* Start the play process going. */ -static void -startPlay (struct nm256_info *card) -{ - if (! card->playing) { - card->playing = 1; - if (nm256_grabInterrupt (card) == 0) { - nm256_setInfo (card->dev_for_play, card); - - /* Enable playback engine and interrupts. */ - nm256_writePort8 (card, 2, NM_PLAYBACK_ENABLE_REG, - NM_PLAYBACK_ENABLE_FLAG | NM_PLAYBACK_FREERUN); - - /* Enable both channels. */ - nm256_writePort16 (card, 2, NM_AUDIO_MUTE_REG, 0x0); - } - } -} - -/* - * 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) -{ - 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. - */ - printk (KERN_ERR "NM256: Read request too large: %d\n", amt); - amt = ringsize / 2; - } - - if (amt < 8) { - printk (KERN_ERR "NM256: Read request too small; %d\n", amt); - return; - } - - spin_lock_irqsave(&card->lock,flags); - /* - * 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) { - card->curRecPos = 0; - nm256_setInfo (card->dev_for_record, card); - nm256_writePort32 (card, 2, NM_RBUFFER_START, card->abuf2); - nm256_writePort32 (card, 2, NM_RBUFFER_END, - card->abuf2 + ringsize); - - nm256_writePort32 (card, 2, NM_RBUFFER_CURRP, - card->abuf2 + card->curRecPos); - enableEngine = 1; - } - else { - /* Not sure what else to do here. */ - spin_unlock_irqrestore(&card->lock,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; - card->requestedRecAmt = amt; - nm256_writePort32 (card, 2, NM_RBUFFER_WMARK, endpos); - /* Enable recording engine and interrupts. */ - if (enableEngine) - nm256_writePort8 (card, 2, NM_RECORD_ENABLE_REG, - NM_RECORD_ENABLE_FLAG | NM_RECORD_FREERUN); - - spin_unlock_irqrestore(&card->lock,flags); -} - -/* Stop the play engine. */ -static void -stopPlay (struct nm256_info *card) -{ - /* Shut off sound from both channels. */ - nm256_writePort16 (card, 2, NM_AUDIO_MUTE_REG, - NM_AUDIO_MUTE_LEFT | NM_AUDIO_MUTE_RIGHT); - /* Disable play engine. */ - nm256_writePort8 (card, 2, NM_PLAYBACK_ENABLE_REG, 0); - if (card->playing) { - nm256_releaseInterrupt (card); - - /* Reset the relevant state bits. */ - card->playing = 0; - card->curPlayPos = 0; - } -} - -/* Stop recording. */ -static void -stopRecord (struct nm256_info *card) -{ - /* Disable recording engine. */ - nm256_writePort8 (card, 2, NM_RECORD_ENABLE_REG, 0); - - if (card->recording) { - nm256_releaseInterrupt (card); - - card->recording = 0; - card->curRecPos = 0; - } -} - -/* - * 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); - amt = (ringsize / 2); - } - - if (amt < NM256_PLAY_WMARK_SIZE) { - printk (KERN_ERR "NM256: Write request too small: %d\n", amt); - return; - } - - card->curPlayPos %= ringsize; - - card->requested_amt = amt; - - spin_lock_irqsave(&card->lock,flags); - - if ((card->curPlayPos + amt) >= ringsize) { - u32 rem = ringsize - card->curPlayPos; - - nm256_writeBuffer8 (card, buffer, 1, - card->abuf1 + card->curPlayPos, - rem); - if (amt > rem) - nm256_writeBuffer8 (card, buffer + rem, 1, card->abuf1, - amt - rem); - } - else - nm256_writeBuffer8 (card, buffer, 1, - 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. - */ - if (! card->playing) { - /* 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 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 - 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); - - spin_unlock_irqrestore(&card->lock,flags); -} - -/* We just got a card playback interrupt; process it. */ -static void -nm256_get_new_block (struct nm256_info *card) -{ - /* Check to see how much got played so far. */ - u32 amt = nm256_readPort32 (card, 2, NM_PBUFFER_CURRP) - card->abuf1; - - if (amt >= card->playbackBufferSize) { - printk (KERN_ERR "NM256: Sound playback pointer invalid!\n"); - amt = 0; - } - - if (amt < card->curPlayPos) - amt = (card->playbackBufferSize - card->curPlayPos) + amt; - else - amt -= card->curPlayPos; - - if (card->requested_amt > (amt + NM256_PLAY_WMARK_SIZE)) { - u32 endstop = - card->curPlayPos + card->requested_amt - NM256_PLAY_WMARK_SIZE; - nm256_writePort32 (card, 2, NM_PBUFFER_WMARK, card->abuf1 + endstop); - } - else { - card->curPlayPos += card->requested_amt; - /* Get a new block to write. This will eventually invoke - nm256_write_block () or stopPlay (). */ - DMAbuf_outputintr (card->dev_for_play, 1); - } -} - -/* - * 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) -{ - /* Grab the current position of the recording pointer. */ - u32 currptr = nm256_readPort32 (card, 2, NM_RBUFFER_CURRP) - card->abuf2; - u32 amtToRead = card->requestedRecAmt; - u32 ringsize = card->recordBufferSize; - - if (currptr >= card->recordBufferSize) { - printk (KERN_ERR "NM256: Sound buffer record pointer invalid!\n"); - currptr = 0; - } - - /* - * 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. */ - if (currptr < card->curRecPos) { - u32 amt = min (ringsize - card->curRecPos, amtToRead); - - nm256_readBuffer8 (card, card->recBuf, 1, - card->abuf2 + card->curRecPos, - amt); - amtToRead -= amt; - card->curRecPos += amt; - card->recBuf += amt; - if (card->curRecPos == ringsize) - card->curRecPos = 0; - } - - if ((card->curRecPos < currptr) && (amtToRead > 0)) { - u32 amt = min (currptr - card->curRecPos, amtToRead); - nm256_readBuffer8 (card, card->recBuf, 1, - card->abuf2 + card->curRecPos, amt); - card->curRecPos = ((card->curRecPos + amt) % ringsize); - } - card->recBuf = NULL; - card->requestedRecAmt = 0; - DMAbuf_inputintr (card->dev_for_record); - } -} - -/* - * Initialize the hardware. - */ -static void -nm256_initHw (struct nm256_info *card) -{ - /* Reset everything. */ - nm256_writePort8 (card, 2, 0x0, 0x11); - nm256_writePort16 (card, 2, 0x214, 0); - - stopRecord (card); - stopPlay (card); -} - -/* - * 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 irqreturn_t -nm256_interrupt (int irq, void *dev_id) -{ - struct nm256_info *card = (struct nm256_info *)dev_id; - u16 status; - static int badintrcount; - int handled = 0; - - if ((card == NULL) || (card->magsig != NM_MAGIC_SIG)) { - printk (KERN_ERR "NM256: Bad card pointer\n"); - return IRQ_NONE; - } - - status = nm256_readPort16 (card, 2, NM_INT_REG); - - /* Not ours. */ - if (status == 0) { - if (badintrcount++ > 1000) { - /* - * 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. - */ - - handled = 1; - if (card->playing) - stopPlay (card); - if (card->recording) - stopRecord (card); - badintrcount = 0; - } - return IRQ_RETVAL(handled); - } - - badintrcount = 0; - - /* Rather boring; check for individual interrupts and process them. */ - - if (status & NM_PLAYBACK_INT) { - handled = 1; - status &= ~NM_PLAYBACK_INT; - NM_ACK_INT (card, NM_PLAYBACK_INT); - - if (card->playing) - nm256_get_new_block (card); - } - - if (status & NM_RECORD_INT) { - handled = 1; - status &= ~NM_RECORD_INT; - NM_ACK_INT (card, NM_RECORD_INT); - - if (card->recording) - nm256_read_block (card); - } - - if (status & NM_MISC_INT_1) { - u8 cbyte; - - handled = 1; - status &= ~NM_MISC_INT_1; - printk (KERN_ERR "NM256: Got misc interrupt #1\n"); - NM_ACK_INT (card, NM_MISC_INT_1); - nm256_writePort16 (card, 2, NM_INT_REG, 0x8000); - cbyte = nm256_readPort8 (card, 2, 0x400); - nm256_writePort8 (card, 2, 0x400, cbyte | 2); - } - - if (status & NM_MISC_INT_2) { - u8 cbyte; - - handled = 1; - status &= ~NM_MISC_INT_2; - printk (KERN_ERR "NM256: Got misc interrupt #2\n"); - NM_ACK_INT (card, NM_MISC_INT_2); - cbyte = nm256_readPort8 (card, 2, 0x400); - nm256_writePort8 (card, 2, 0x400, cbyte & ~2); - } - - /* Unknown interrupt. */ - if (status) { - handled = 1; - printk (KERN_ERR "NM256: Fire in the hole! Unknown status 0x%x\n", - status); - /* Pray. */ - NM_ACK_INT (card, status); - } - return IRQ_RETVAL(handled); -} - -/* - * 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 irqreturn_t -nm256_interrupt_zx (int irq, void *dev_id) -{ - struct nm256_info *card = (struct nm256_info *)dev_id; - u32 status; - static int badintrcount; - int handled = 0; - - if ((card == NULL) || (card->magsig != NM_MAGIC_SIG)) { - printk (KERN_ERR "NM256: Bad card pointer\n"); - return IRQ_NONE; - } - - status = nm256_readPort32 (card, 2, NM_INT_REG); - - /* Not ours. */ - if (status == 0) { - if (badintrcount++ > 1000) { - printk (KERN_ERR "NM256: Releasing interrupt, over 1000 invalid interrupts\n"); - /* - * 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. - */ - - handled = 1; - if (card->playing) - stopPlay (card); - if (card->recording) - stopRecord (card); - badintrcount = 0; - } - return IRQ_RETVAL(handled); - } - - badintrcount = 0; - - /* Rather boring; check for individual interrupts and process them. */ - - if (status & NM2_PLAYBACK_INT) { - handled = 1; - status &= ~NM2_PLAYBACK_INT; - NM2_ACK_INT (card, NM2_PLAYBACK_INT); - - if (card->playing) - nm256_get_new_block (card); - } - - if (status & NM2_RECORD_INT) { - handled = 1; - status &= ~NM2_RECORD_INT; - NM2_ACK_INT (card, NM2_RECORD_INT); - - if (card->recording) - nm256_read_block (card); - } - - if (status & NM2_MISC_INT_1) { - u8 cbyte; - - handled = 1; - status &= ~NM2_MISC_INT_1; - printk (KERN_ERR "NM256: Got misc interrupt #1\n"); - NM2_ACK_INT (card, NM2_MISC_INT_1); - cbyte = nm256_readPort8 (card, 2, 0x400); - nm256_writePort8 (card, 2, 0x400, cbyte | 2); - } - - if (status & NM2_MISC_INT_2) { - u8 cbyte; - - handled = 1; - status &= ~NM2_MISC_INT_2; - printk (KERN_ERR "NM256: Got misc interrupt #2\n"); - NM2_ACK_INT (card, NM2_MISC_INT_2); - cbyte = nm256_readPort8 (card, 2, 0x400); - nm256_writePort8 (card, 2, 0x400, cbyte & ~2); - } - - /* Unknown interrupt. */ - if (status) { - handled = 1; - printk (KERN_ERR "NM256: Fire in the hole! Unknown status 0x%x\n", - status); - /* Pray. */ - NM2_ACK_INT (card, status); - } - return IRQ_RETVAL(handled); -} - -/* - * Request our interrupt. - */ -static int -nm256_grabInterrupt (struct nm256_info *card) -{ - if (card->has_irq++ == 0) { - if (request_irq (card->irq, card->introutine, IRQF_SHARED, - "NM256_audio", card) < 0) { - printk (KERN_ERR "NM256: can't obtain IRQ %d\n", card->irq); - return -1; - } - } - return 0; -} - -/* - * Release our interrupt. - */ -static int -nm256_releaseInterrupt (struct nm256_info *card) -{ - if (card->has_irq <= 0) { - printk (KERN_ERR "nm256: too many calls to releaseInterrupt\n"); - return -1; - } - card->has_irq--; - if (card->has_irq == 0) { - free_irq (card->irq, card); - } - 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) -{ - struct nm256_info *card = (struct nm256_info *)dev->driver_private; - int t2 = 10; - u32 testaddr; - u16 testb; - int done = 0; - - if (card->magsig != NM_MAGIC_SIG) { - printk (KERN_ERR "NM256: Bad magic signature in isReady!\n"); - return 0; - } - - testaddr = card->mixer_status_offset; - testb = card->mixer_status_mask; - - /* - * Loop around waiting for the mixer to become ready. - */ - while (! done && t2-- > 0) { - if ((nm256_readPort16 (card, 2, testaddr) & testb) == 0) - done = 1; - 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) -{ - struct nm256_info *card = (struct nm256_info *)dev->driver_private; - - if (card->magsig != NM_MAGIC_SIG) { - printk (KERN_ERR "NM256: Bad magic signature in readAC97Reg!\n"); - return -EINVAL; - } - - if (reg < 128) { - int res; - - nm256_isReady (dev); - res = nm256_readPort16 (card, 2, card->mixer + reg); - /* Magic delay. Bleah yucky. */ - udelay (1000); - return res; - } - else - 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) -{ - unsigned long flags; - int tries = 2; - int done = 0; - u32 base; - - struct nm256_info *card = (struct nm256_info *)dev->driver_private; - - if (card->magsig != NM_MAGIC_SIG) { - printk (KERN_ERR "NM256: Bad magic signature in writeAC97Reg!\n"); - return -EINVAL; - } - - base = card->mixer; - - spin_lock_irqsave(&card->lock,flags); - - nm256_isReady (dev); - - /* Wait for the write to take, too. */ - while ((tries-- > 0) && !done) { - nm256_writePort16 (card, 2, base + reg, value); - if (nm256_isReady (dev)) { - done = 1; - break; - } - - } - - spin_unlock_irqrestore(&card->lock,flags); - udelay (1000); - - 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; - unsigned short value; -}; - -static struct initialValues nm256_ac97_initial_values[] = -{ - { 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) -{ - struct nm256_info *card = (struct nm256_info *)dev->driver_private; - int x; - - if (card->magsig != NM_MAGIC_SIG) { - printk (KERN_ERR "NM256: Bad magic signature in resetAC97!\n"); - return -EINVAL; - } - - /* Reset the mixer. 'Tis magic! */ - nm256_writePort8 (card, 2, 0x6c0, 1); -// nm256_writePort8 (card, 2, 0x6cc, 0x87); /* This crashes Dell latitudes */ - nm256_writePort8 (card, 2, 0x6cc, 0x80); - nm256_writePort8 (card, 2, 0x6cc, 0x0); - - 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 particularly special here; it just passes the - * mixer ioctl to the AC97 driver. - */ -static int -nm256_default_mixer_ioctl (int dev, unsigned int cmd, void __user *arg) -{ - struct nm256_info *card = nm256_find_card_for_mixer (dev); - if (card != NULL) - return ac97_mixer_ioctl (&(card->mdev), cmd, arg); - else - return -ENODEV; -} - -static struct mixer_operations nm256_mixer_operations = { - .owner = THIS_MODULE, - .id = "NeoMagic", - .name = "NM256AC97Mixer", - .ioctl = nm256_default_mixer_ioctl -}; - -/* - * 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 } } }, - { SOUND_MIXER_PCM, { { 65, 65 } } }, - { SOUND_MIXER_CD, { { 65, 65 } } }, - { -1, { { 0, 0 } } } -}; - - -/* Installs the AC97 mixer into CARD. */ -static int __devinit -nm256_install_mixer (struct nm256_info *card) -{ - int mixer; - - card->mdev.reset_device = nm256_resetAC97; - card->mdev.read_reg = nm256_readAC97Reg; - card->mdev.write_reg = nm256_writeAC97Reg; - card->mdev.driver_private = (void *)card; - - if (ac97_init (&(card->mdev))) - return -1; - - mixer = sound_alloc_mixerdev(); - if (num_mixers >= MAX_MIXER_DEV) { - printk ("NM256 mixer: Unable to alloc mixerdev\n"); - return -1; - } - - mixer_devs[mixer] = &nm256_mixer_operations; - card->mixer_oss_dev = mixer; - - /* Some reasonable default values. */ - ac97_set_values (&(card->mdev), mixer_defaults); - - printk(KERN_INFO "Initialized AC97 mixer\n"); - 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 audio buffer in the video - * RAM. - */ - -static void __devinit -nm256_peek_for_sig (struct nm256_info *card) -{ - u32 port1offset - = card->port[0].physaddr + card->port[0].end_offset - 0x0400; - /* The signature is located 1K below the end of video RAM. */ - char __iomem *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; - } - 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", - pointer); - } - - iounmap (temp); -} - -/* - * Install a driver for the PCI device referenced by PCIDEV. - * VERSTR is a human-readable version string. - */ - -static int __devinit -nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr) -{ - struct nm256_info *card; - int x; - - if (pci_enable_device(pcidev)) - return 0; - - card = kmalloc (sizeof (struct nm256_info), GFP_KERNEL); - if (card == NULL) { - printk (KERN_ERR "NM256: out of memory!\n"); - return 0; - } - - card->magsig = NM_MAGIC_SIG; - card->playing = 0; - card->recording = 0; - card->rev = rev; - spin_lock_init(&card->lock); - - /* Init the memory port info. */ - for (x = 0; x < 2; x++) { - card->port[x].physaddr = pci_resource_start (pcidev, x); - card->port[x].ptr = NULL; - card->port[x].start_offset = 0; - card->port[x].end_offset = 0; - } - - /* 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 (card); - 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) { - /* 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_load = 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 (card); - 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->port[0].end_offset = 6144 * 1024; - else - 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; - } - - if (buffertop >= 98304 && buffertop < card->port[0].end_offset) - card->port[0].end_offset = buffertop; - else - nm256_peek_for_sig (card); - - 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->port[0].start_offset, card->port[0].end_offset); - - if (nm256_remap_ports (card)) { - kfree (card); - return 0; - } - - /* See if we can get the interrupt. */ - - card->irq = pcidev->irq; - card->has_irq = 0; - - if (nm256_grabInterrupt (card) != 0) { - nm256_release_ports (card); - kfree (card); - return 0; - } - - nm256_releaseInterrupt (card); - - /* - * 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] = - sound_install_audiodrv(AUDIO_DRIVER_VERSION, - "NM256", &nm256_audio_driver, - sizeof(struct audio_driver), - DMA_NODMA, AFMT_U8 | AFMT_S16_LE, - NULL, -1, -1)) >= 0) { - /* 1K minimum buffer size. */ - audio_devs[card->dev[x]]->min_fragment = 10; - /* Maximum of 8K buffer size. */ - audio_devs[card->dev[x]]->max_fragment = 13; - } - else { - printk(KERN_ERR "NM256: Too many PCM devices available\n"); - nm256_release_ports (card); - kfree (card); - return 0; - } - } - - pci_set_drvdata(pcidev,card); - - /* Insert the card in the list. */ - card->next_card = nmcard_list; - nmcard_list = card; - - printk(KERN_INFO "Initialized NeoMagic %s audio in PCI native mode\n", - verstr); - - /* - * And our mixer. (We should allow support for other mixers, maybe.) - */ - - nm256_install_mixer (card); - - return 1; -} - - -static int __devinit -nm256_probe(struct pci_dev *pcidev,const struct pci_device_id *pciid) -{ - if (pcidev->device == PCI_DEVICE_ID_NEOMAGIC_NM256AV_AUDIO) - return nm256_install(pcidev, REV_NM256AV, "256AV"); - if (pcidev->device == PCI_DEVICE_ID_NEOMAGIC_NM256ZX_AUDIO) - return nm256_install(pcidev, REV_NM256ZX, "256ZX"); - if (pcidev->device == PCI_DEVICE_ID_NEOMAGIC_NM256XL_PLUS_AUDIO) - return nm256_install(pcidev, REV_NM256ZX, "256XL+"); - return -1; /* should not come here ... */ -} - -static void __devinit -nm256_remove(struct pci_dev *pcidev) { - struct nm256_info *xcard = pci_get_drvdata(pcidev); - struct nm256_info *card,*next_card = NULL; - - for (card = nmcard_list; card != NULL; card = next_card) { - next_card = card->next_card; - if (card == xcard) { - stopPlay (card); - stopRecord (card); - if (card->has_irq) - free_irq (card->irq, card); - nm256_release_ports (card); - sound_unload_mixerdev (card->mixer_oss_dev); - sound_unload_audiodev (card->dev[0]); - sound_unload_audiodev (card->dev[1]); - kfree (card); - break; - } - } - if (nmcard_list == card) - nmcard_list = next_card; -} - -/* - * Open the device - * - * DEV - device - * MODE - mode to open device (logical OR of OPEN_READ and OPEN_WRITE) - * - * Called when opening the DMAbuf (dmabuf.c:259) - */ -static int -nm256_audio_open(int dev, int mode) -{ - struct nm256_info *card = nm256_find_card (dev); - int w; - - if (card == NULL) - return -ENODEV; - - if (card->dev[0] == dev) - w = 0; - else if (card->dev[1] == dev) - w = 1; - else - return -ENODEV; - - if (card->opencnt[w] > 0) - return -EBUSY; - - /* No bits set? Huh? */ - 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. (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) - mode = OPEN_WRITE; - else if (card->is_open_record) - mode = OPEN_READ; - else mode = 0; - } - - if (mode & OPEN_WRITE) { - if (card->is_open_play == 0) { - card->dev_for_play = dev; - card->is_open_play = 1; - } - else - return -EBUSY; - } - - if (mode & OPEN_READ) { - if (card->is_open_record == 0) { - card->dev_for_record = dev; - card->is_open_record = 1; - } - else - return -EBUSY; - } - - card->opencnt[w]++; - return 0; -} - -/* - * Close the device - * - * DEV - device - * - * Called when closing the DMAbuf (dmabuf.c:477) - * after halt_xfer - */ -static void -nm256_audio_close(int dev) -{ - struct nm256_info *card = nm256_find_card (dev); - - if (card != NULL) { - int w; - - if (card->dev[0] == dev) - w = 0; - else if (card->dev[1] == dev) - w = 1; - else - return; - - card->opencnt[w]--; - if (card->opencnt[w] <= 0) { - card->opencnt[w] = 0; - - if (card->dev_for_play == dev) { - stopPlay (card); - card->is_open_play = 0; - card->dev_for_play = -1; - } - - if (card->dev_for_record == dev) { - stopRecord (card); - card->is_open_record = 0; - card->dev_for_record = -1; - } - } - } -} - -/* Standard ioctl handler. */ -static int -nm256_audio_ioctl(int dev, unsigned int cmd, void __user *arg) -{ - int ret; - u32 oldinfo; - int w; - - struct nm256_info *card = nm256_find_card (dev); - - if (card == NULL) - return -ENODEV; - - if (dev == card->dev[0]) - w = 0; - 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: - if (get_user(ret, (int __user *) arg)) - return -EFAULT; - - if (ret != 0) { - oldinfo = card->sinfo[w].samplerate; - card->sinfo[w].samplerate = ret; - ret = nm256_setInfo(dev, card); - if (ret != 0) - card->sinfo[w].samplerate = oldinfo; - } - if (ret == 0) - ret = card->sinfo[w].samplerate; - break; - - case SOUND_PCM_READ_RATE: - ret = card->sinfo[w].samplerate; - break; - - case SNDCTL_DSP_STEREO: - if (get_user(ret, (int __user *) arg)) - return -EFAULT; - - card->sinfo[w].stereo = ret ? 1 : 0; - ret = nm256_setInfo (dev, card); - if (ret == 0) - ret = card->sinfo[w].stereo; - - break; - - case SOUND_PCM_WRITE_CHANNELS: - if (get_user(ret, (int __user *) arg)) - return -EFAULT; - - if (ret < 1 || ret > 3) - ret = card->sinfo[w].stereo + 1; - else { - card->sinfo[w].stereo = ret - 1; - ret = nm256_setInfo (dev, card); - if (ret == 0) - ret = card->sinfo[w].stereo + 1; - } - break; - - case SOUND_PCM_READ_CHANNELS: - ret = card->sinfo[w].stereo + 1; - break; - - case SNDCTL_DSP_SETFMT: - if (get_user(ret, (int __user *) arg)) - return -EFAULT; - - if (ret != 0) { - oldinfo = card->sinfo[w].bits; - card->sinfo[w].bits = ret; - ret = nm256_setInfo (dev, card); - if (ret != 0) - card->sinfo[w].bits = oldinfo; - } - if (ret == 0) - ret = card->sinfo[w].bits; - break; - - case SOUND_PCM_READ_BITS: - ret = card->sinfo[w].bits; - break; - - default: - return -EINVAL; - } - return put_user(ret, (int __user *) arg); -} - -/* - * 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) -{ - struct audio_operations *adev = audio_devs[dev]; - struct dma_buffparms *dmap = adev->dmap_out; - char *dma_start = - (char *)(physbuf - (unsigned long)dmap->raw_buf_phys - + (unsigned long)dmap->raw_buf); - - return dma_start; -} - - -/* - * Output a block to sound device - * - * dev - device number - * buf - physical address of buffer - * total_count - total byte count in buffer - * intrflag - set if this has been called from an interrupt - * (via DMAbuf_outputintr) - * restart_dma - set if engine needs to be re-initialised - * - * Called when: - * 1. Starting output (dmabuf.c:1327) - * 2. (dmabuf.c:1504) - * 3. A new buffer needs to be sent to the device (dmabuf.c:1579) - */ -static void -nm256_audio_output_block(int dev, unsigned long physbuf, - int total_count, int intrflag) -{ - struct nm256_info *card = nm256_find_card (dev); - - if (card != NULL) { - char *dma_buf = nm256_getDMAbuffer (dev, physbuf); - card->is_open_play = 1; - card->dev_for_play = dev; - nm256_write_block (card, dma_buf, total_count); - } -} - -/* Ditto, but do recording instead. */ -static void -nm256_audio_start_input(int dev, unsigned long physbuf, int count, - int intrflag) -{ - struct nm256_info *card = nm256_find_card (dev); - - if (card != NULL) { - char *dma_buf = nm256_getDMAbuffer (dev, physbuf); - card->is_open_record = 1; - card->dev_for_record = dev; - nm256_startRecording (card, dma_buf, count); - } -} - -/* - * 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) -{ - struct nm256_info *card = nm256_find_card (dev); - - if (card == NULL) - return -ENODEV; - - if (card->is_open_record && card->dev_for_record != dev) - return -EBUSY; - - audio_devs[dev]->dmap_in->flags |= DMA_NODMA; - return 0; -} - -/* - * Prepare for outputting samples to `dev' - * - * Each buffer that will be passed will be `bsize' bytes long, - * with a total of `bcount' buffers. - * - * Called when: - * 1. A trigger enables audio output (dmabuf.c:978) - * 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) -{ - struct nm256_info *card = nm256_find_card (dev); - - if (card == NULL) - return -ENODEV; - - if (card->is_open_play && card->dev_for_play != dev) - return -EBUSY; - - audio_devs[dev]->dmap_out->flags |= DMA_NODMA; - return 0; -} - -/* Stop the current operations associated with DEV. */ -static void -nm256_audio_reset(int dev) -{ - struct nm256_info *card = nm256_find_card (dev); - - if (card != NULL) { - if (card->dev_for_play == dev) - stopPlay (card); - if (card->dev_for_record == dev) - stopRecord (card); - } -} - -static int -nm256_audio_local_qlen(int dev) -{ - return 0; -} - -static struct audio_driver nm256_audio_driver = -{ - .owner = THIS_MODULE, - .open = nm256_audio_open, - .close = nm256_audio_close, - .output_block = nm256_audio_output_block, - .start_input = nm256_audio_start_input, - .ioctl = nm256_audio_ioctl, - .prepare_for_input = nm256_audio_prepare_for_input, - .prepare_for_output = nm256_audio_prepare_for_output, - .halt_io = nm256_audio_reset, - .local_qlen = nm256_audio_local_qlen, -}; - -static struct pci_device_id nm256_pci_tbl[] = { - {PCI_VENDOR_ID_NEOMAGIC, PCI_DEVICE_ID_NEOMAGIC_NM256AV_AUDIO, - PCI_ANY_ID, PCI_ANY_ID, 0, 0}, - {PCI_VENDOR_ID_NEOMAGIC, PCI_DEVICE_ID_NEOMAGIC_NM256ZX_AUDIO, - PCI_ANY_ID, PCI_ANY_ID, 0, 0}, - {PCI_VENDOR_ID_NEOMAGIC, PCI_DEVICE_ID_NEOMAGIC_NM256XL_PLUS_AUDIO, - PCI_ANY_ID, PCI_ANY_ID, 0, 0}, - {0,} -}; -MODULE_DEVICE_TABLE(pci, nm256_pci_tbl); -MODULE_LICENSE("GPL"); - - -static struct pci_driver nm256_pci_driver = { - .name = "nm256_audio", - .id_table = nm256_pci_tbl, - .probe = nm256_probe, - .remove = nm256_remove, -}; - -module_param(usecache, bool, 0); -module_param(buffertop, int, 0); -module_param(nm256_debug, bool, 0644); -module_param(force_load, bool, 0); - -static int __init do_init_nm256(void) -{ - printk (KERN_INFO "NeoMagic 256AV/256ZX audio driver, version 1.1p\n"); - return pci_register_driver(&nm256_pci_driver); -} - -static void __exit cleanup_nm256 (void) -{ - pci_unregister_driver(&nm256_pci_driver); -} - -module_init(do_init_nm256); -module_exit(cleanup_nm256); - -/* - * Local variables: - * c-basic-offset: 4 - * End: - */ |