diff options
| -rw-r--r-- | sound/pci/nm256/nm256.c | 120 |
1 files changed, 96 insertions, 24 deletions
diff --git a/sound/pci/nm256/nm256.c b/sound/pci/nm256/nm256.c index 3a3ba6f..cc297ab 100644 --- a/sound/pci/nm256/nm256.c +++ b/sound/pci/nm256/nm256.c @@ -228,6 +228,7 @@ struct nm256 { unsigned int use_cache: 1; /* use one big coef. table */ unsigned int reset_workaround: 1; /* Workaround for some laptops to avoid freeze */ unsigned int reset_workaround_2: 1; /* Extended workaround for some other laptops to avoid freeze */ + unsigned int in_resume: 1; int mixer_base; /* register offset of ac97 mixer */ int mixer_status_offset; /* offset of mixer status reg. */ @@ -242,6 +243,7 @@ struct nm256 { struct nm256_stream streams[2]; struct snd_ac97 *ac97; + unsigned short *ac97_regs; /* register caches, only for valid regs */ struct snd_pcm *pcm; @@ -1153,23 +1155,63 @@ snd_nm256_ac97_ready(struct nm256 *chip) return 0; } +/* + * 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 reg; + unsigned short value; +}; + +static struct initialValues nm256_ac97_init_val[] = +{ + { AC97_MASTER, 0x8000 }, + { AC97_HEADPHONE, 0x8000 }, + { AC97_MASTER_MONO, 0x8000 }, + { AC97_PC_BEEP, 0x8000 }, + { AC97_PHONE, 0x8008 }, + { AC97_MIC, 0x8000 }, + { AC97_LINE, 0x8808 }, + { AC97_CD, 0x8808 }, + { AC97_VIDEO, 0x8808 }, + { AC97_AUX, 0x8808 }, + { AC97_PCM, 0x8808 }, + { AC97_REC_SEL, 0x0000 }, + { AC97_REC_GAIN, 0x0B0B }, + { AC97_GENERAL_PURPOSE, 0x0000 }, + { AC97_3D_CONTROL, 0x8000 }, + { AC97_VENDOR_ID1, 0x8384 }, + { AC97_VENDOR_ID2, 0x7609 }, +}; + +static int nm256_ac97_idx(unsigned short reg) +{ + int i; + for (i = 0; i < ARRAY_SIZE(nm256_ac97_init_val); i++) + if (nm256_ac97_init_val[i].reg == reg) + return i; + return -1; +} + /* + * some nm256 easily crash when reading from mixer registers + * thus we're treating it as a write-only mixer and cache the + * written values */ static unsigned short snd_nm256_ac97_read(struct snd_ac97 *ac97, unsigned short reg) { struct nm256 *chip = ac97->private_data; - int res; - - if (reg >= 128) - return 0; + int idx = nm256_ac97_idx(reg); - if (! snd_nm256_ac97_ready(chip)) + if (idx < 0) return 0; - res = snd_nm256_readw(chip, chip->mixer_base + reg); - /* Magic delay. Bleah yucky. */ - msleep(1); - return res; + return chip->ac97_regs[idx]; } /* @@ -1180,8 +1222,12 @@ snd_nm256_ac97_write(struct snd_ac97 *ac97, { struct nm256 *chip = ac97->private_data; int tries = 2; + int idx = nm256_ac97_idx(reg); u32 base; + if (idx < 0) + return; + base = chip->mixer_base; snd_nm256_ac97_ready(chip); @@ -1190,12 +1236,32 @@ snd_nm256_ac97_write(struct snd_ac97 *ac97, while (tries-- > 0) { snd_nm256_writew(chip, base + reg, val); msleep(1); /* a little delay here seems better.. */ - if (snd_nm256_ac97_ready(chip)) + if (snd_nm256_ac97_ready(chip)) { + /* successful write: set cache */ + chip->ac97_regs[idx] = val; return; + } } snd_printd("nm256: ac97 codec not ready..\n"); } +/* static resolution table */ +static struct snd_ac97_res_table nm256_res_table[] = { + { AC97_MASTER, 0x1f1f }, + { AC97_HEADPHONE, 0x1f1f }, + { AC97_MASTER_MONO, 0x001f }, + { AC97_PC_BEEP, 0x001f }, + { AC97_PHONE, 0x001f }, + { AC97_MIC, 0x001f }, + { AC97_LINE, 0x1f1f }, + { AC97_CD, 0x1f1f }, + { AC97_VIDEO, 0x1f1f }, + { AC97_AUX, 0x1f1f }, + { AC97_PCM, 0x1f1f }, + { AC97_REC_GAIN, 0x0f0f }, + { } /* terminator */ +}; + /* initialize the ac97 into a known state */ static void snd_nm256_ac97_reset(struct snd_ac97 *ac97) @@ -1213,6 +1279,16 @@ snd_nm256_ac97_reset(struct snd_ac97 *ac97) snd_nm256_writeb(chip, 0x6cc, 0x80); snd_nm256_writeb(chip, 0x6cc, 0x0); } + if (! chip->in_resume) { + int i; + for (i = 0; i < ARRAY_SIZE(nm256_ac97_init_val); i++) { + /* preload the cache, so as to avoid even a single + * read of the mixer regs + */ + snd_nm256_ac97_write(ac97, nm256_ac97_init_val[i].reg, + nm256_ac97_init_val[i].value); + } + } } /* create an ac97 mixer interface */ @@ -1221,32 +1297,25 @@ snd_nm256_mixer(struct nm256 *chip) { struct snd_ac97_bus *pbus; struct snd_ac97_template ac97; - int i, err; + int err; static struct snd_ac97_bus_ops ops = { .reset = snd_nm256_ac97_reset, .write = snd_nm256_ac97_write, .read = snd_nm256_ac97_read, }; - /* looks like nm256 hangs up when unexpected registers are touched... */ - static int mixer_regs[] = { - AC97_MASTER, AC97_HEADPHONE, AC97_MASTER_MONO, - AC97_PC_BEEP, AC97_PHONE, AC97_MIC, AC97_LINE, AC97_CD, - AC97_VIDEO, AC97_AUX, AC97_PCM, AC97_REC_SEL, - AC97_REC_GAIN, AC97_GENERAL_PURPOSE, AC97_3D_CONTROL, - /*AC97_EXTENDED_ID,*/ - AC97_VENDOR_ID1, AC97_VENDOR_ID2, - -1 - }; + + chip->ac97_regs = kcalloc(sizeof(short), + ARRAY_SIZE(nm256_ac97_init_val), GFP_KERNEL); + if (! chip->ac97_regs) + return -ENOMEM; if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0) return err; memset(&ac97, 0, sizeof(ac97)); ac97.scaps = AC97_SCAP_AUDIO; /* we support audio! */ - ac97.limited_regs = 1; - for (i = 0; mixer_regs[i] >= 0; i++) - set_bit(mixer_regs[i], ac97.reg_accessed); ac97.private_data = chip; + ac97.res_table = nm256_res_table; pbus->no_vra = 1; err = snd_ac97_mixer(pbus, &ac97, &chip->ac97); if (err < 0) @@ -1331,6 +1400,7 @@ static int nm256_resume(struct pci_dev *pci) int i; /* Perform a full reset on the hardware */ + chip->in_resume = 1; pci_restore_state(pci); pci_enable_device(pci); snd_nm256_init_chip(chip); @@ -1348,6 +1418,7 @@ static int nm256_resume(struct pci_dev *pci) } snd_power_change_state(card, SNDRV_CTL_POWER_D0); + chip->in_resume = 0; return 0; } #endif /* CONFIG_PM */ @@ -1372,6 +1443,7 @@ static int snd_nm256_free(struct nm256 *chip) free_irq(chip->irq, chip); pci_disable_device(chip->pci); + kfree(chip->ac97_regs); kfree(chip); return 0; } |
