diff options
Diffstat (limited to 'drivers/sound/nm256_audio.c')
| -rw-r--r-- | drivers/sound/nm256_audio.c | 721 |
1 files changed, 523 insertions, 198 deletions
diff --git a/drivers/sound/nm256_audio.c b/drivers/sound/nm256_audio.c index 0c3ee7b37..a066c65b9 100644 --- a/drivers/sound/nm256_audio.c +++ b/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 struct audio_driver nm256_audio_driver; 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 @@ nm256_find_card (int dev) 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 @@ 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. */ +/* + * 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 @@ nm256_setInfo (int dev, struct nm256_info *card) 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 @@ startPlay (struct nm256_info *card) /* 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 @@ startPlay (struct nm256_info *card) } } -/* 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 @@ 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. */ + /* + * 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 @@ nm256_startRecording (struct nm256_info *card, char *buffer, u32 amt) 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 @@ nm256_startRecording (struct nm256_info *card, char *buffer, u32 amt) } 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 @@ nm256_startRecording (struct nm256_info *card, char *buffer, u32 amt) 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 @@ 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); + 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 @@ stopRecord (struct nm256_info *card) } } -/* 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 @@ nm256_write_block (struct nm256_info *card, char *buffer, u32 amt) card->requested_amt = amt; + save_flags (flags); + cli (); + if ((card->curPlayPos + amt) >= ringsize) { u32 rem = ringsize - card->curPlayPos; @@ -288,33 +393,40 @@ nm256_write_block (struct nm256_info *card, char *buffer, u32 amt) 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 @@ nm256_get_new_block (struct nm256_info *card) 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 @@ nm256_get_new_block (struct nm256_info *card) /* 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 @@ nm256_read_block (struct nm256_info *card) 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 @@ nm256_read_block (struct nm256_info *card) } #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 @@ nm256_interrupt (int irq, void *dev_id, struct pt_regs *dummy) /* 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_interrupt (int irq, void *dev_id, struct pt_regs *dummy) 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 @@ nm256_interrupt (int irq, void *dev_id, struct pt_regs *dummy) } } -/* 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 @@ nm256_interrupt_zx (int irq, void *dev_id, struct pt_regs *dummy) 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_interrupt_zx (int irq, void *dev_id, struct pt_regs *dummy) 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 @@ nm256_interrupt_zx (int irq, void *dev_id, struct pt_regs *dummy) } } -/* Request our interrupt. */ +/* + * Request our interrupt. + */ static int nm256_grabInterrupt (struct nm256_info *card) { @@ -597,7 +735,9 @@ nm256_grabInterrupt (struct nm256_info *card) return 0; } -/* Release our interrupt. */ +/* + * Release our interrupt. + */ static int nm256_releaseInterrupt (struct nm256_info *card) { @@ -612,6 +752,11 @@ nm256_releaseInterrupt (struct nm256_info *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) { @@ -626,26 +771,25 @@ nm256_isReady (struct ac97_hwint *dev) 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_readAC97Reg (struct ac97_hwint *dev, u8 reg) nm256_isReady (dev); res = nm256_readPort16 (card, 2, card->mixer + reg); + /* Magic delay. Bleah yucky. */ udelay (1000); return res; } @@ -668,6 +813,10 @@ nm256_readAC97Reg (struct ac97_hwint *dev, u8 reg) 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 @@ nm256_writeAC97Reg (struct ac97_hwint *dev, u8 reg, u16 value) 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 @@ struct initialValues 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 @@ nm256_resetAC97 (struct ac97_hwint *dev) 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 @@ static struct mixer_operations nm256_mixer_operations = { 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 @@ static struct ac97_mixer_value_list mixer_defaults[] = { { -1, { { 0, 0 } } } }; + +/* Installs the AC97 mixer into CARD. */ static int nm256_install_mixer (struct nm256_info *card) { @@ -812,36 +982,67 @@ nm256_install_mixer (struct nm256_info *card) 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_peek_for_sig (struct nm256_info *card, u32 port1addr) +nm256_full_reset (struct nm256_info *card) { - char *temp = ioremap_nocache (port1addr + card->port1_end - 0x0400, 16); + 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 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 @@ nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr) 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). */ + /* 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; + } - card->ports[1] = ioremap_nocache (port2addr, NM_PORT2_SIZE); + /* Port 2 is easy. */ + card->port[1].start_offset = 0; + card->port[1].end_offset = NM_PORT2_SIZE; - if (card->ports[1] == NULL) { - printk (KERN_ERR "NM256: Unable to remap port 2\n"); + /* 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->ports[0] = - ioremap_nocache (port1addr + card->port1_start, - card->port1_end - card->port1_start); + card->port[0].start_offset, card->port[0].end_offset); - 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 @@ nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr) 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 @@ nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr) * 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 @@ nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr) } 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 @@ nm256_install(struct pci_dev *pcidev, enum nm256rev rev, char *verstr) 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 @@ init_nm256(void) 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 @@ nm256_audio_open(int dev, int mode) 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 @@ nm256_audio_close(int dev) } } +/* Standard ioctl handler. */ static int nm256_audio_ioctl(int dev, unsigned int cmd, caddr_t arg) { @@ -1122,6 +1428,11 @@ nm256_audio_ioctl(int dev, unsigned int cmd, caddr_t arg) 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 @@ nm256_audio_ioctl(int dev, unsigned int cmd, caddr_t arg) 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 @@ nm256_audio_output_block(int dev, unsigned long physbuf, } } +/* 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 @@ nm256_audio_start_input(int dev, unsigned long physbuf, int 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) { @@ -1278,6 +1600,7 @@ nm256_audio_prepare_for_input(int dev, int bsize, int bcount) * 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 @@ static int loaded = 0; 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 @@ cleanup_module (void) 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 @@ cleanup_module (void) } nmcard_list = NULL; } +#ifdef CONFIG_APM + apm_unregister_callback (&handle_apm_event); +#endif } #endif |