diff options
Diffstat (limited to 'sound/oss/nm256_audio.c')
| -rw-r--r-- | sound/oss/nm256_audio.c | 1707 |
1 files changed, 1707 insertions, 0 deletions
diff --git a/sound/oss/nm256_audio.c b/sound/oss/nm256_audio.c new file mode 100644 index 00000000000..f9166e13519 --- /dev/null +++ b/sound/oss/nm256_audio.c @@ -0,0 +1,1707 @@ +/* + * 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/pm.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include "sound_config.h" +#include "nm256.h" +#include "nm256_coeff.h" + +int nm256_debug; +static int force_load; + +/* + * 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, struct pt_regs *dummy); +static irqreturn_t nm256_interrupt_zx (int irq, void *dev_id, struct pt_regs *dummy); +static int handle_pm_event (struct pm_dev *dev, pm_request_t rqst, void *data); + +/* 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. */ +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 pt_regs *dummy) +{ + 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 pt_regs *dummy) +{ + 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, SA_SHIRQ, + "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 __init +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; +} + +/* 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 __init +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; + struct pm_dev *pmdev; + 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); + + pmdev = pm_register(PM_PCI_DEV, PM_PCI_ID(pcidev), handle_pm_event); + if (pmdev) + pmdev->data = card; + + return 1; +} + + +/* + * PM event handler, so the card is properly reinitialized after a power + * event. + */ +static int +handle_pm_event (struct pm_dev *dev, pm_request_t rqst, void *data) +{ + struct nm256_info *crd = (struct nm256_info*) dev->data; + if (crd) { + switch (rqst) { + case PM_SUSPEND: + break; + case PM_RESUME: + { + 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; +} + +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_module_init(&nm256_pci_driver); +} + +static void __exit cleanup_nm256 (void) +{ + pci_unregister_driver(&nm256_pci_driver); + pm_unregister_all (&handle_pm_event); +} + +module_init(do_init_nm256); +module_exit(cleanup_nm256); + +/* + * Local variables: + * c-basic-offset: 4 + * End: + */ |