From: Andreas Mohr Date: Wed, 20 Aug 2008 08:04:56 +0000 (+0200) Subject: ALSA: als4000 - Code clean up X-Git-Tag: v2.6.28-rc1~720^2~173 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=c08744498491759168119255fae2a1bd9532a268;p=linux-2.6-omap-h63xx.git ALSA: als4000 - Code clean up - use specs-derived register name enums instead of open-coded numeric values, for better understanding of things - fix naming confusion ("gcr" was _NOT_ the GCR register stuff, but instead the io _base_ which has multiplexed _access_ to GCR config space, at _sub_ registers 0x08 and 0x0c) - add FIXME comments about a race condition and MPU401 features Signed-off-by: Andreas Mohr Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- diff --git a/sound/pci/als4000.c b/sound/pci/als4000.c index 27ce6136ab0..92d8c47cd3b 100644 --- a/sound/pci/als4000.c +++ b/sound/pci/als4000.c @@ -60,6 +60,7 @@ * * ToDo: * - Proper shared IRQ handling? + * - by default, don't enable legacy game and use PCI game I/O * - power management? (card can do voice wakeup according to datasheet!!) */ @@ -107,7 +108,7 @@ MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 struct snd_card_als4000 { /* most frequent access first */ - unsigned long gcr; + unsigned long iobase; struct pci_dev *pci; struct snd_sb *chip; #ifdef SUPPORT_JOYSTICK @@ -122,24 +123,89 @@ static struct pci_device_id snd_als4000_ids[] = { MODULE_DEVICE_TABLE(pci, snd_als4000_ids); -static inline void snd_als4000_gcr_write_addr(unsigned long port, u32 reg, u32 val) +enum als4k_iobase_t { + /* IOx: B == Byte, W = Word, D = DWord */ + ALS4K_IOD_00_AC97_ACCESS = 0x00, + ALS4K_IOW_04_AC97_READ = 0x04, + ALS4K_IOB_06_AC97_STATUS = 0x06, + ALS4K_IOB_07_IRQSTATUS = 0x07, + ALS4K_IOD_08_GCR_DATA = 0x08, + ALS4K_IOB_0C_GCR_INDEX = 0x0c, + ALS4K_IOB_0E_SB_MPU_IRQ = 0x0e, + ALS4K_IOB_10_ADLIB_ADDR0 = 0x10, + ALS4K_IOB_11_ADLIB_ADDR1 = 0x11, + ALS4K_IOB_12_ADLIB_ADDR2 = 0x12, + ALS4K_IOB_13_ADLIB_ADDR3 = 0x13, + ALS4K_IOB_14_MIXER_INDEX = 0x14, + ALS4K_IOB_15_MIXER_DATA = 0x15, + ALS4K_IOB_16_ESP_RST_PORT = 0x16, + ALS4K_IOB_16_CR1E_ACK_PORT = 0x16, /* 2nd function */ + ALS4K_IOB_18_OPL_ADDR0 = 0x18, + ALS4K_IOB_19_OPL_ADDR1 = 0x19, + ALS4K_IOB_1A_ESP_RD_DATA = 0x1a, + ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c, + ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */ + ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e, + ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f, + ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20, + ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21, + ALS4K_IOB_30_MIDI_DATA = 0x30, + ALS4K_IOB_31_MIDI_STATUS = 0x31, + ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */ +}; + +enum als4k_gcr_t { + /* all registers 32bit wide */ + ALS4K_GCR_8C_MISC_CTRL = 0x8c, + ALS4K_GCR_90_TEST_MODE_REG = 0x90, + ALS4K_GCR_91_DMA0_ADDR = 0x91, + ALS4K_GCR_92_DMA0_MODE_COUNT = 0x92, + ALS4K_GCR_93_DMA1_ADDR = 0x93, + ALS4K_GCR_94_DMA1_MODE_COUNT = 0x94, + ALS4K_GCR_95_DMA3_ADDR = 0x95, + ALS4K_GCR_96_DMA3_MODE_COUNT = 0x96, + ALS4K_GCR_99_DMA_EMULATION_CTRL = 0x99, + ALS4K_GCR_A0_FIFO1_CURRENT_ADDR = 0xa0, + ALS4K_GCR_A1_FIFO1_STATUS_BYTECOUNT = 0xa1, + ALS4K_GCR_A2_FIFO2_PCIADDR = 0xa2, + ALS4K_GCR_A3_FIFO2_COUNT = 0xa3, + ALS4K_GCR_A4_FIFO2_CURRENT_ADDR = 0xa4, + ALS4K_GCR_A5_FIFO1_STATUS_BYTECOUNT = 0xa5, + ALS4K_GCR_A6_PM_CTRL = 0xa6, + ALS4K_GCR_A7_PCI_ACCESS_STORAGE = 0xa7, + ALS4K_GCR_A8_LEGACY_CFG1 = 0xa8, + ALS4K_GCR_A9_LEGACY_CFG2 = 0xa9, + ALS4K_GCR_FF_DUMMY_SCRATCH = 0xff, +}; + +enum als4k_gcr_8c_t { + ALS4K_GCR_8C_IRQ_MASK_CTRL_ENABLE = 0x8000, + ALS4K_GCR_8C_CHIP_REV_MASK = 0xf0000 +}; + +static inline void snd_als4000_gcr_write_addr(unsigned long iobase, + enum als4k_gcr_t reg, + u32 val) { - outb(reg, port+0x0c); - outl(val, port+0x08); + outb(reg, iobase + ALS4K_IOB_0C_GCR_INDEX); + outl(val, iobase + ALS4K_IOD_08_GCR_DATA); } -static inline void snd_als4000_gcr_write(struct snd_sb *sb, u32 reg, u32 val) +static inline void snd_als4000_gcr_write(struct snd_sb *sb, + enum als4k_gcr_t reg, + u32 val) { snd_als4000_gcr_write_addr(sb->alt_port, reg, val); } -static inline u32 snd_als4000_gcr_read_addr(unsigned long port, u32 reg) +static inline u32 snd_als4000_gcr_read_addr(unsigned long iobase, + enum als4k_gcr_t reg) { - outb(reg, port+0x0c); - return inl(port+0x08); + outb(reg, iobase + ALS4K_IOB_0C_GCR_INDEX); + return inl(iobase + ALS4K_IOD_08_GCR_DATA); } -static inline u32 snd_als4000_gcr_read(struct snd_sb *sb, u32 reg) +static inline u32 snd_als4000_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg) { return snd_als4000_gcr_read_addr(sb->alt_port, reg); } @@ -156,15 +222,17 @@ static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate) static inline void snd_als4000_set_capture_dma(struct snd_sb *chip, dma_addr_t addr, unsigned size) { - snd_als4000_gcr_write(chip, 0xa2, addr); - snd_als4000_gcr_write(chip, 0xa3, (size-1)); + snd_als4000_gcr_write(chip, ALS4K_GCR_A2_FIFO2_PCIADDR, addr); + snd_als4000_gcr_write(chip, ALS4K_GCR_A3_FIFO2_COUNT, (size-1)); } static inline void snd_als4000_set_playback_dma(struct snd_sb *chip, - dma_addr_t addr, unsigned size) + dma_addr_t addr, + unsigned size) { - snd_als4000_gcr_write(chip, 0x91, addr); - snd_als4000_gcr_write(chip, 0x92, (size-1)|0x180000); + snd_als4000_gcr_write(chip, ALS4K_GCR_91_DMA0_ADDR, addr); + snd_als4000_gcr_write(chip, ALS4K_GCR_92_DMA0_MODE_COUNT, + (size-1)|0x180000); } #define ALS4000_FORMAT_SIGNED (1<<0) @@ -305,6 +373,12 @@ static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int struct snd_sb *chip = snd_pcm_substream_chip(substream); int result = 0; + /* FIXME race condition in here!!! + chip->mode non-atomic update gets consistently protected + by reg_lock always, _except_ for this place!! + Probably need to take reg_lock as outer (or inner??) lock, too. + (or serialize both lock operations? probably not, though... - racy?) + */ spin_lock(&chip->mixer_lock); switch (cmd) { case SNDRV_PCM_TRIGGER_START: @@ -356,7 +430,8 @@ static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *s unsigned int result; spin_lock(&chip->reg_lock); - result = snd_als4000_gcr_read(chip, 0xa4) & 0xffff; + result = snd_als4000_gcr_read(chip, ALS4K_GCR_A4_FIFO2_CURRENT_ADDR); + result &= 0xffff; spin_unlock(&chip->reg_lock); return bytes_to_frames( substream->runtime, result ); } @@ -367,7 +442,8 @@ static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream * unsigned result; spin_lock(&chip->reg_lock); - result = snd_als4000_gcr_read(chip, 0xa0) & 0xffff; + result = snd_als4000_gcr_read(chip, ALS4K_GCR_A0_FIFO1_CURRENT_ADDR); + result &= 0xffff; spin_unlock(&chip->reg_lock); return bytes_to_frames( substream->runtime, result ); } @@ -376,12 +452,13 @@ static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream * * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not). * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ - * register (alt_port + 0x0e). Probably something could be optimized here to - * query/write one register only... + * register (alt_port + ALS4K_IOB_0E_SB_MPU_IRQ). Probably something + * could be optimized here to query/write one register only... * And even if both registers need to be queried, then there's still the * question of whether it's actually correct to ACK PCI IRQ before reading * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear* * SB IRQ status. + * (hmm, page 38 mentions it the other way around!) * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS?? * */ static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id) @@ -391,7 +468,7 @@ static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id) unsigned sb_status; /* find out which bit of the ALS4000 produced the interrupt */ - gcr_status = inb(chip->alt_port + 0xe); + gcr_status = inb(chip->alt_port + ALS4K_IOB_0E_SB_MPU_IRQ); if ((gcr_status & 0x80) && (chip->playback_substream)) /* playback */ snd_pcm_period_elapsed(chip->playback_substream); @@ -400,7 +477,7 @@ static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id) if ((gcr_status & 0x10) && (chip->rmidi)) /* MPU401 interrupt */ snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data); /* release the gcr */ - outb(gcr_status, chip->alt_port + 0xe); + outb(gcr_status, chip->alt_port + ALS4K_IOB_0E_SB_MPU_IRQ); spin_lock(&chip->mixer_lock); sb_status = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS); @@ -543,25 +620,25 @@ static int __devinit snd_als4000_pcm(struct snd_sb *chip, int device) /******************************************************************/ -static void snd_als4000_set_addr(unsigned long gcr, - unsigned int sb, - unsigned int mpu, - unsigned int opl, - unsigned int game) +static void snd_als4000_set_addr(unsigned long iobase, + unsigned int sb_io, + unsigned int mpu_io, + unsigned int opl_io, + unsigned int game_io) { - u32 confA = 0; - u32 confB = 0; + u32 cfg1 = 0; + u32 cfg2 = 0; - if (mpu > 0) - confB |= (mpu | 1) << 16; - if (sb > 0) - confB |= (sb | 1); - if (game > 0) - confA |= (game | 1) << 16; - if (opl > 0) - confA |= (opl | 1); - snd_als4000_gcr_write_addr(gcr, 0xa8, confA); - snd_als4000_gcr_write_addr(gcr, 0xa9, confB); + if (mpu_io > 0) + cfg2 |= (mpu_io | 1) << 16; + if (sb_io > 0) + cfg2 |= (sb_io | 1); + if (game_io > 0) + cfg1 |= (game_io | 1) << 16; + if (opl_io > 0) + cfg1 |= (opl_io | 1); + snd_als4000_gcr_write_addr(iobase, ALS4K_GCR_A8_LEGACY_CFG1, cfg1); + snd_als4000_gcr_write_addr(iobase, ALS4K_GCR_A9_LEGACY_CFG2, cfg2); } static void snd_als4000_configure(struct snd_sb *chip) @@ -579,12 +656,15 @@ static void snd_als4000_configure(struct snd_sb *chip) spin_unlock_irq(&chip->mixer_lock); spin_lock_irq(&chip->reg_lock); - /* magic number. Enables interrupts(?) */ - snd_als4000_gcr_write(chip, 0x8c, 0x28000); - for(i = 0x91; i <= 0x96; ++i) + /* enable interrupts */ + snd_als4000_gcr_write(chip, ALS4K_GCR_8C_MISC_CTRL, + ALS4K_GCR_8C_IRQ_MASK_CTRL_ENABLE); + + for (i = ALS4K_GCR_91_DMA0_ADDR; i <= ALS4K_GCR_96_DMA3_MODE_COUNT; ++i) snd_als4000_gcr_write(chip, i, 0); - snd_als4000_gcr_write(chip, 0x99, snd_als4000_gcr_read(chip, 0x99)); + snd_als4000_gcr_write(chip, ALS4K_GCR_99_DMA_EMULATION_CTRL, + snd_als4000_gcr_read(chip, ALS4K_GCR_99_DMA_EMULATION_CTRL)); spin_unlock_irq(&chip->reg_lock); } @@ -628,7 +708,7 @@ static int __devinit snd_als4000_create_gameport(struct snd_card_als4000 *acard, gameport_set_port_data(gp, r); /* Enable legacy joystick port */ - snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1); + snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1); gameport_register_port(acard->gameport); @@ -643,7 +723,9 @@ static void snd_als4000_free_gameport(struct snd_card_als4000 *acard) gameport_unregister_port(acard->gameport); acard->gameport = NULL; - snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0); /* disable joystick */ + /* disable joystick */ + snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0); + release_and_free_resource(r); } } @@ -654,10 +736,10 @@ static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { } static void snd_card_als4000_free( struct snd_card *card ) { - struct snd_card_als4000 * acard = (struct snd_card_als4000 *)card->private_data; + struct snd_card_als4000 *acard = card->private_data; /* make sure that interrupts are disabled */ - snd_als4000_gcr_write_addr( acard->gcr, 0x8c, 0); + snd_als4000_gcr_write_addr(acard->iobase, ALS4K_GCR_8C_MISC_CTRL, 0); /* free resources */ snd_als4000_free_gameport(acard); pci_release_regions(acard->pci); @@ -670,7 +752,7 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci, static int dev; struct snd_card *card; struct snd_card_als4000 *acard; - unsigned long gcr; + unsigned long iobase; struct snd_sb *chip; struct snd_opl3 *opl3; unsigned short word; @@ -699,7 +781,7 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci, pci_disable_device(pci); return err; } - gcr = pci_resource_start(pci, 0); + iobase = pci_resource_start(pci, 0); pci_read_config_word(pci, PCI_COMMAND, &word); pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO); @@ -713,16 +795,16 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci, return -ENOMEM; } - acard = (struct snd_card_als4000 *)card->private_data; + acard = card->private_data; acard->pci = pci; - acard->gcr = gcr; + acard->iobase = iobase; card->private_free = snd_card_als4000_free; /* disable all legacy ISA stuff */ - snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0); + snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0); if ((err = snd_sbdsp_create(card, - gcr + 0x10, + iobase + ALS4K_IOB_10_ADLIB_ADDR0, pci->irq, snd_als4000_interrupt, -1, @@ -734,7 +816,7 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci, acard->chip = chip; chip->pci = pci; - chip->alt_port = gcr; + chip->alt_port = iobase; snd_card_set_dev(card, &pci->dev); snd_als4000_configure(chip); @@ -745,11 +827,16 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci, card->shortname, chip->alt_port, chip->irq); if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000, - gcr+0x30, MPU401_INFO_INTEGRATED, + iobase + ALS4K_IOB_30_MIDI_DATA, + MPU401_INFO_INTEGRATED, pci->irq, 0, &chip->rmidi)) < 0) { - printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n", gcr+0x30); + printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n", + iobase + ALS4K_IOB_30_MIDI_DATA); goto out_err; } + /* FIXME: ALS4000 has interesting MPU401 configuration features + * at CR 0x1A (pass-thru / UART switching, fast MIDI clock, etc.), + * however there doesn't seem to be an ALSA API for this... */ if ((err = snd_als4000_pcm(chip, 0)) < 0) { goto out_err; @@ -758,10 +845,13 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci, goto out_err; } - if (snd_opl3_create(card, gcr+0x10, gcr+0x12, + if (snd_opl3_create(card, + iobase + ALS4K_IOB_10_ADLIB_ADDR0, + iobase + ALS4K_IOB_12_ADLIB_ADDR2, OPL3_HW_AUTO, 1, &opl3) < 0) { printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx?\n", - gcr+0x10, gcr+0x12 ); + iobase + ALS4K_IOB_10_ADLIB_ADDR0, + iobase + ALS4K_IOB_12_ADLIB_ADDR2); } else { if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) { goto out_err; @@ -831,13 +921,13 @@ static int snd_als4000_resume(struct pci_dev *pci) #ifdef SUPPORT_JOYSTICK if (acard->gameport) - snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1); + snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1); #endif snd_power_change_state(card, SNDRV_CTL_POWER_D0); return 0; } -#endif +#endif /* CONFIG_PM */ static struct pci_driver driver = {