/* * Support for VIA 82Cxxx Audio Codecs * Copyright 1999,2000 Jeff Garzik * * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2. * See the "COPYING" file distributed with this software for more info. * * For a list of known bugs (errata) and documentation, * see via-audio.pdf in linux/Documentation/DocBook. * If this documentation does not exist, run "make pdfdocs". * If "make pdfdocs" fails, obtain the documentation from * the driver's Website at * http://gtf.org/garzik/drivers/via82cxxx/ * */ #define VIA_VERSION "1.1.14b" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #undef VIA_DEBUG /* define to enable debugging output and checks */ #ifdef VIA_DEBUG /* note: prints function name for you */ #define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args) #else #define DPRINTK(fmt, args...) #endif #undef VIA_NDEBUG /* define to disable lightweight runtime checks */ #ifdef VIA_NDEBUG #define assert(expr) #else #define assert(expr) \ if(!(expr)) { \ printk( "Assertion failed! %s,%s,%s,line=%d\n", \ #expr,__FILE__,__FUNCTION__,__LINE__); \ } #endif #if defined(CONFIG_PROC_FS) && \ defined(CONFIG_SOUND_VIA82CXXX_PROCFS) #define VIA_PROC_FS 1 #endif #define VIA_SUPPORT_MMAP 1 /* buggy, for now... */ #define MAX_CARDS 1 #define VIA_CARD_NAME "VIA 82Cxxx Audio driver " VIA_VERSION #define VIA_MODULE_NAME "via82cxxx" #define PFX VIA_MODULE_NAME ": " #define VIA_COUNTER_LIMIT 100000 /* size of DMA buffers */ #define VIA_MAX_BUFFER_DMA_PAGES 32 /* buffering default values in ms */ #define VIA_DEFAULT_FRAG_TIME 20 #define VIA_DEFAULT_BUFFER_TIME 500 #define VIA_MAX_FRAG_SIZE PAGE_SIZE #define VIA_MIN_FRAG_SIZE 64 #define VIA_MIN_FRAG_NUMBER 2 /* 82C686 function 5 (audio codec) PCI configuration registers */ #define VIA_ACLINK_CTRL 0x41 #define VIA_FUNC_ENABLE 0x42 #define VIA_PNP_CONTROL 0x43 #define VIA_FM_NMI_CTRL 0x48 /* * controller base 0 (scatter-gather) registers * * NOTE: Via datasheet lists first channel as "read" * channel and second channel as "write" channel. * I changed the naming of the constants to be more * clear than I felt the datasheet to be. */ #define VIA_BASE0_PCM_OUT_CHAN 0x00 /* output PCM to user */ #define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00 #define VIA_BASE0_PCM_OUT_CHAN_CTRL 0x01 #define VIA_BASE0_PCM_OUT_CHAN_TYPE 0x02 #define VIA_BASE0_PCM_IN_CHAN 0x10 /* input PCM from user */ #define VIA_BASE0_PCM_IN_CHAN_STATUS 0x10 #define VIA_BASE0_PCM_IN_CHAN_CTRL 0x11 #define VIA_BASE0_PCM_IN_CHAN_TYPE 0x12 /* offsets from base */ #define VIA_PCM_STATUS 0x00 #define VIA_PCM_CONTROL 0x01 #define VIA_PCM_TYPE 0x02 #define VIA_PCM_TABLE_ADDR 0x04 #define VIA_PCM_BLOCK_COUNT 0x0C /* XXX unused DMA channel for FM PCM data */ #define VIA_BASE0_FM_OUT_CHAN 0x20 #define VIA_BASE0_FM_OUT_CHAN_STATUS 0x20 #define VIA_BASE0_FM_OUT_CHAN_CTRL 0x21 #define VIA_BASE0_FM_OUT_CHAN_TYPE 0x22 #define VIA_BASE0_AC97_CTRL 0x80 #define VIA_BASE0_SGD_STATUS_SHADOW 0x84 #define VIA_BASE0_GPI_INT_ENABLE 0x8C #define VIA_INTR_OUT ((1<<0) | (1<<4) | (1<<8)) #define VIA_INTR_IN ((1<<1) | (1<<5) | (1<<9)) #define VIA_INTR_FM ((1<<2) | (1<<6) | (1<<10)) #define VIA_INTR_MASK (VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM) /* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */ #define VIA_IRQ_ON_FLAG (1<<0) /* int on each flagged scatter block */ #define VIA_IRQ_ON_EOL (1<<1) /* int at end of scatter list */ #define VIA_INT_SEL_PCI_LAST_LINE_READ (0) /* int at PCI read of last line */ #define VIA_INT_SEL_LAST_SAMPLE_SENT (1<<2) /* int at last sample sent */ #define VIA_INT_SEL_ONE_LINE_LEFT (1<<3) /* int at less than one line to send */ #define VIA_PCM_FMT_STEREO (1<<4) /* PCM stereo format (bit clear == mono) */ #define VIA_PCM_FMT_16BIT (1<<5) /* PCM 16-bit format (bit clear == 8-bit) */ #define VIA_PCM_REC_FIFO (1<<6) /* PCM Recording FIFO */ #define VIA_RESTART_SGD_ON_EOL (1<<7) /* restart scatter-gather at EOL */ #define VIA_PCM_FMT_MASK (VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT) #define VIA_CHAN_TYPE_MASK (VIA_RESTART_SGD_ON_EOL | \ VIA_IRQ_ON_FLAG | \ VIA_IRQ_ON_EOL) #define VIA_CHAN_TYPE_INT_SELECT (VIA_INT_SEL_LAST_SAMPLE_SENT) /* PCI configuration register bits and masks */ #define VIA_CR40_AC97_READY 0x01 #define VIA_CR40_AC97_LOW_POWER 0x02 #define VIA_CR40_SECONDARY_READY 0x04 #define VIA_CR41_AC97_ENABLE 0x80 /* enable AC97 codec */ #define VIA_CR41_AC97_RESET 0x40 /* clear bit to reset AC97 */ #define VIA_CR41_AC97_WAKEUP 0x20 /* wake up from power-down mode */ #define VIA_CR41_AC97_SDO 0x10 /* force Serial Data Out (SDO) high */ #define VIA_CR41_VRA 0x08 /* enable variable sample rate */ #define VIA_CR41_PCM_ENABLE 0x04 /* AC Link SGD Read Channel PCM Data Output */ #define VIA_CR41_FM_PCM_ENABLE 0x02 /* AC Link FM Channel PCM Data Out */ #define VIA_CR41_SB_PCM_ENABLE 0x01 /* AC Link SB PCM Data Output */ #define VIA_CR41_BOOT_MASK (VIA_CR41_AC97_ENABLE | \ VIA_CR41_AC97_WAKEUP | \ VIA_CR41_AC97_SDO) #define VIA_CR41_RUN_MASK (VIA_CR41_AC97_ENABLE | \ VIA_CR41_AC97_RESET | \ VIA_CR41_VRA | \ VIA_CR41_PCM_ENABLE) #define VIA_CR42_SB_ENABLE 0x01 #define VIA_CR42_MIDI_ENABLE 0x02 #define VIA_CR42_FM_ENABLE 0x04 #define VIA_CR42_GAME_ENABLE 0x08 #define VIA_CR44_SECOND_CODEC_SUPPORT (1 << 6) #define VIA_CR44_AC_LINK_ACCESS (1 << 7) #define VIA_CR48_FM_TRAP_TO_NMI (1 << 2) /* controller base 0 register bitmasks */ #define VIA_INT_DISABLE_MASK (~(0x01|0x02)) #define VIA_SGD_STOPPED (1 << 2) #define VIA_SGD_ACTIVE (1 << 7) #define VIA_SGD_TERMINATE (1 << 6) #define VIA_SGD_FLAG (1 << 0) #define VIA_SGD_EOL (1 << 1) #define VIA_SGD_START (1 << 7) #define VIA_CR80_FIRST_CODEC 0 #define VIA_CR80_SECOND_CODEC (1 << 30) #define VIA_CR80_FIRST_CODEC_VALID (1 << 25) #define VIA_CR80_VALID (1 << 25) #define VIA_CR80_SECOND_CODEC_VALID (1 << 27) #define VIA_CR80_BUSY (1 << 24) #define VIA_CR83_BUSY (1) #define VIA_CR83_FIRST_CODEC_VALID (1 << 1) #define VIA_CR80_READ (1 << 23) #define VIA_CR80_WRITE_MODE 0 #define VIA_CR80_REG_IDX(idx) ((((idx) & 0xFF) >> 1) << 16) /* capabilities we announce */ #ifdef VIA_SUPPORT_MMAP #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \ DSP_CAP_TRIGGER | DSP_CAP_REALTIME) #else #define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \ DSP_CAP_TRIGGER | DSP_CAP_REALTIME) #endif /* scatter-gather DMA table entry, exactly as passed to hardware */ struct via_sgd_table { u32 addr; u32 count; /* includes additional VIA_xxx bits also */ }; #define VIA_EOL (1 << 31) #define VIA_FLAG (1 << 30) #define VIA_STOP (1 << 29) enum via_channel_states { sgd_stopped = 0, sgd_in_progress = 1, }; struct via_buffer_pgtbl { dma_addr_t handle; void *cpuaddr; }; struct via_channel { atomic_t n_frags; atomic_t hw_ptr; wait_queue_head_t wait; unsigned int sw_ptr; unsigned int slop_len; unsigned int n_irqs; int bytes; unsigned is_active : 1; unsigned is_record : 1; unsigned is_mapped : 1; unsigned is_enabled : 1; u8 pcm_fmt; /* VIA_PCM_FMT_xxx */ unsigned rate; /* sample rate */ unsigned int frag_size; unsigned int frag_number; volatile struct via_sgd_table *sgtable; dma_addr_t sgt_handle; unsigned int page_number; struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES]; long iobase; const char *name; }; /* data stored for each chip */ struct via_info { struct pci_dev *pdev; long baseaddr; struct ac97_codec ac97; spinlock_t lock; int card_num; /* unique card number, from 0 */ int dev_dsp; /* /dev/dsp index from register_sound_dsp() */ unsigned rev_h : 1; int locked_rate : 1; struct semaphore syscall_sem; struct semaphore open_sem; struct via_channel ch_in; struct via_channel ch_out; struct via_channel ch_fm; }; /* number of cards, used for assigning unique numbers to cards */ static unsigned via_num_cards = 0; /**************************************************************** * * prototypes * * */ static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id); static void via_remove_one (struct pci_dev *pdev); static ssize_t via_dsp_read(struct file *file, char *buffer, size_t count, loff_t *ppos); static ssize_t via_dsp_write(struct file *file, const char *buffer, size_t count, loff_t *ppos); static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait); static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); static int via_dsp_open (struct inode *inode, struct file *file); static int via_dsp_release(struct inode *inode, struct file *file); static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma); static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg); static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value); static u8 via_ac97_wait_idle (struct via_info *card); static void via_chan_free (struct via_info *card, struct via_channel *chan); static void via_chan_clear (struct via_info *card, struct via_channel *chan); static void via_chan_pcm_fmt (struct via_channel *chan, int reset); static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan); #ifdef VIA_PROC_FS static int via_init_proc (void); static void via_cleanup_proc (void); static int via_card_init_proc (struct via_info *card); static void via_card_cleanup_proc (struct via_info *card); #else static inline int via_init_proc (void) { return 0; } static inline void via_cleanup_proc (void) {} static inline int via_card_init_proc (struct via_info *card) { return 0; } static inline void via_card_cleanup_proc (struct via_info *card) {} #endif /**************************************************************** * * Various data the driver needs * * */ static struct pci_device_id via_pci_tbl[] __initdata = { { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, PCI_ANY_ID, PCI_ANY_ID, }, { 0, } }; MODULE_DEVICE_TABLE(pci,via_pci_tbl); static struct pci_driver via_driver = { name: VIA_MODULE_NAME, id_table: via_pci_tbl, probe: via_init_one, remove: via_remove_one, }; /**************************************************************** * * Low-level base 0 register read/write helpers * * */ /** * via_chan_stop - Terminate DMA on specified PCM channel * @iobase: PCI base address for SGD channel registers * * Terminate scatter-gather DMA operation for given * channel (derived from @iobase), if DMA is active. * * Note that @iobase is not the PCI base address, * but the PCI base address plus an offset to * one of three PCM channels supported by the chip. * */ static inline void via_chan_stop (int iobase) { if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE) outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL); } /** * via_chan_status_clear - Clear status flags on specified DMA channel * @iobase: PCI base address for SGD channel registers * * Clear any pending status flags for the given * DMA channel (derived from @iobase), if any * flags are asserted. * * Note that @iobase is not the PCI base address, * but the PCI base address plus an offset to * one of three PCM channels supported by the chip. * */ static inline void via_chan_status_clear (int iobase) { u8 tmp = inb (iobase + VIA_PCM_STATUS); if (tmp != 0) outb (tmp, iobase + VIA_PCM_STATUS); } /** * sg_begin - Begin recording or playback on a PCM channel * @chan: Channel for which DMA operation shall begin * * Start scatter-gather DMA for the given channel. * */ static inline void sg_begin (struct via_channel *chan) { outb (VIA_SGD_START, chan->iobase + VIA_PCM_CONTROL); } /**************************************************************** * * Miscellaneous debris * * */ /** * via_syscall_down - down the card-specific syscell semaphore * @card: Private info for specified board * @nonblock: boolean, non-zero if O_NONBLOCK is set * * Encapsulates standard method of acquiring the syscall sem. * * Returns negative errno on error, or zero for success. */ static inline int via_syscall_down (struct via_info *card, int nonblock) { if (nonblock) { if (down_trylock (&card->syscall_sem)) return -EAGAIN; } else { if (down_interruptible (&card->syscall_sem)) return -ERESTARTSYS; } return 0; } /** * via_stop_everything - Stop all audio operations * @card: Private info for specified board * * Stops all DMA operations and interrupts, and clear * any pending status bits resulting from those operations. */ static void via_stop_everything (struct via_info *card) { DPRINTK ("ENTER\n"); assert (card != NULL); /* * terminate any existing operations on audio read/write channels */ via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN); via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN); via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN); /* * clear any existing stops / flags (sanity check mainly) */ via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN); via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN); via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN); /* * clear any enabled interrupt bits, reset to 8-bit mono PCM mode */ outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE); outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE); outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE); DPRINTK ("EXIT\n"); } /** * via_set_rate - Set PCM rate for given channel * @ac97: Pointer to generic codec info struct * @chan: Private info for specified channel * @rate: Desired PCM sample rate, in Khz * * Sets the PCM sample rate for a channel. * * Values for @rate are clamped to a range of 4000 Khz through 48000 Khz, * due to hardware constraints. */ static int via_set_rate (struct ac97_codec *ac97, struct via_channel *chan, unsigned rate) { struct via_info *card = ac97->private_data; int rate_reg; DPRINTK ("ENTER, rate = %d\n", rate); if (card->locked_rate) { chan->rate = 48000; goto out; } if (rate > 48000) rate = 48000; if (rate < 4000) rate = 4000; rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE : AC97_PCM_FRONT_DAC_RATE; via_ac97_write_reg (ac97, AC97_POWER_CONTROL, (via_ac97_read_reg (ac97, AC97_POWER_CONTROL) & ~0x0200) | 0x0200); via_ac97_write_reg (ac97, rate_reg, rate); via_ac97_write_reg (ac97, AC97_POWER_CONTROL, via_ac97_read_reg (ac97, AC97_POWER_CONTROL) & ~0x0200); udelay (10); /* the hardware might return a value different than what we * passed to it, so read the rate value back from hardware * to see what we came up with */ chan->rate = via_ac97_read_reg (ac97, rate_reg); if (chan->rate == 0) { card->locked_rate = 1; chan->rate = 48000; printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n"); } out: DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate); return chan->rate; } /**************************************************************** * * Channel-specific operations * * */ /** * via_chan_init_defaults - Initialize a struct via_channel * @card: Private audio chip info * @chan: Channel to be initialized * * Zero @chan, and then set all static defaults for the structure. */ static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan) { memset (chan, 0, sizeof (*chan)); if (chan == &card->ch_out) { chan->name = "PCM-OUT"; chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN; } else if (chan == &card->ch_in) { chan->name = "PCM-IN"; chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN; chan->is_record = 1; } else if (chan == &card->ch_fm) { chan->name = "PCM-OUT-FM"; chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN; } else { BUG(); } init_waitqueue_head (&chan->wait); chan->pcm_fmt = VIA_PCM_FMT_MASK; chan->is_enabled = 1; chan->frag_number = 0; chan->frag_size = 0; atomic_set(&chan->n_frags, 0); atomic_set (&chan->hw_ptr, 0); } /** * via_chan_init - Initialize PCM channel * @card: Private audio chip info * @chan: Channel to be initialized * * Performs some of the preparations necessary to begin * using a PCM channel. * * Currently the preparations consist in * setting the * PCM channel to a known state. */ static void via_chan_init (struct via_info *card, struct via_channel *chan) { DPRINTK ("ENTER\n"); /* bzero channel structure, and init members to defaults */ via_chan_init_defaults (card, chan); /* stop any existing channel output */ via_chan_clear (card, chan); via_chan_status_clear (chan->iobase); via_chan_pcm_fmt (chan, 1); DPRINTK ("EXIT\n"); } /** * via_chan_buffer_init - Initialize PCM channel buffer * @card: Private audio chip info * @chan: Channel to be initialized * * Performs some of the preparations necessary to begin * using a PCM channel. * * Currently the preparations include allocating the * scatter-gather DMA table and buffers, * and passing the * address of the DMA table to the hardware. * * Note that special care is taken when passing the * DMA table address to hardware, because it was found * during driver development that the hardware did not * always "take" the address. */ static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan) { int page, offset; int i; DPRINTK ("ENTER\n"); if (chan->sgtable != NULL) { DPRINTK ("EXIT\n"); return 0; } /* alloc DMA-able memory for scatter-gather table */ chan->sgtable = pci_alloc_consistent (card->pdev, (sizeof (struct via_sgd_table) * chan->frag_number), &chan->sgt_handle); if (!chan->sgtable) { printk (KERN_ERR PFX "DMA table alloc fail, aborting\n"); DPRINTK ("EXIT\n"); return -ENOMEM; } memset ((void*)chan->sgtable, 0, (sizeof (struct via_sgd_table) * chan->frag_number)); /* alloc DMA-able memory for scatter-gather buffers */ chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE + (((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0); for (i = 0; i < chan->page_number; i++) { chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE, &chan->pgtbl[i].handle); if (!chan->pgtbl[i].cpuaddr) { chan->page_number = i; goto err_out_nomem; } #ifndef VIA_NDEBUG memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size); #endif #if 1 DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n", i, (long)chan->pgtbl[i].handle, virt_to_phys(chan->pgtbl[i].cpuaddr), chan->pgtbl[i].cpuaddr); #endif } for (i = 0; i < chan->frag_number; i++) { page = i / (PAGE_SIZE / chan->frag_size); offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size; chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG); chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset); #if 1 DPRINTK ("dmabuf #%d (32(h)=%lx)\n", i, (long)chan->sgtable[i].addr); #endif } /* overwrite the last buffer information */ chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL); /* set location of DMA-able scatter-gather info table */ DPRINTK ("outl (0x%X, 0x%04lX)\n", cpu_to_le32 (chan->sgt_handle), chan->iobase + VIA_PCM_TABLE_ADDR); via_ac97_wait_idle (card); outl (cpu_to_le32 (chan->sgt_handle), chan->iobase + VIA_PCM_TABLE_ADDR); udelay (20); via_ac97_wait_idle (card); DPRINTK ("inl (0x%lX) = %x\n", chan->iobase + VIA_PCM_TABLE_ADDR, inl(chan->iobase + VIA_PCM_TABLE_ADDR)); DPRINTK ("EXIT\n"); return 0; err_out_nomem: printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n"); via_chan_buffer_free (card, chan); DPRINTK ("EXIT\n"); return -ENOMEM; } /** * via_chan_free - Release a PCM channel * @card: Private audio chip info * @chan: Channel to be released * * Performs all the functions necessary to clean up * an initialized channel. * * Currently these functions include disabled any * active DMA operations, setting the PCM channel * back to a known state, and releasing any allocated * sound buffers. */ static void via_chan_free (struct via_info *card, struct via_channel *chan) { DPRINTK ("ENTER\n"); synchronize_irq(); spin_lock_irq (&card->lock); /* stop any existing channel output */ via_chan_stop (chan->iobase); via_chan_status_clear (chan->iobase); via_chan_pcm_fmt (chan, 1); spin_unlock_irq (&card->lock); DPRINTK ("EXIT\n"); } static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan) { int i; DPRINTK ("ENTER\n"); /* zero location of DMA-able scatter-gather info table */ via_ac97_wait_idle(card); outl (0, chan->iobase + VIA_PCM_TABLE_ADDR); for (i = 0; i < chan->page_number; i++) if (chan->pgtbl[i].cpuaddr) { pci_free_consistent (card->pdev, PAGE_SIZE, chan->pgtbl[i].cpuaddr, chan->pgtbl[i].handle); chan->pgtbl[i].cpuaddr = NULL; chan->pgtbl[i].handle = 0; } chan->page_number = 0; if (chan->sgtable) { pci_free_consistent (card->pdev, (sizeof (struct via_sgd_table) * chan->frag_number), (void*)chan->sgtable, chan->sgt_handle); chan->sgtable = NULL; } DPRINTK ("EXIT\n"); } /** * via_chan_pcm_fmt - Update PCM channel settings * @chan: Channel to be updated * @reset: Boolean. If non-zero, channel will be reset * to 8-bit mono mode. * * Stores the settings of the current PCM format, * 8-bit or 16-bit, and mono/stereo, into the * hardware settings for the specified channel. * If @reset is non-zero, the channel is reset * to 8-bit mono mode. Otherwise, the channel * is set to the values stored in the channel * information struct @chan. */ static void via_chan_pcm_fmt (struct via_channel *chan, int reset) { DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n", chan->pcm_fmt, reset ? "yes" : "no"); assert (chan != NULL); if (reset) /* reset to 8-bit mono mode */ chan->pcm_fmt = 0; /* enable interrupts on FLAG and EOL */ chan->pcm_fmt |= VIA_CHAN_TYPE_MASK; /* if we are recording, enable recording fifo bit */ if (chan->is_record) chan->pcm_fmt |= VIA_PCM_REC_FIFO; /* set interrupt select bits where applicable (PCM & FM out channels) */ if (!chan->is_record) chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT; outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE); DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n", chan->pcm_fmt, inb (chan->iobase + VIA_PCM_TYPE)); } /** * via_chan_clear - Stop DMA channel operation, and reset pointers * @chan: Channel to be cleared * * Call via_chan_stop to halt DMA operations, and then resets * all software pointers which track DMA operation. */ static void via_chan_clear (struct via_info *card, struct via_channel *chan) { DPRINTK ("ENTER\n"); via_chan_stop (chan->iobase); via_chan_buffer_free(card, chan); chan->is_active = 0; chan->is_mapped = 0; chan->is_enabled = 1; chan->slop_len = 0; chan->sw_ptr = 0; chan->n_irqs = 0; atomic_set (&chan->hw_ptr, 0); DPRINTK ("EXIT\n"); } /** * via_chan_set_speed - Set PCM sample rate for given channel * @card: Private info for specified board * @chan: Channel whose sample rate will be adjusted * @val: New sample rate, in Khz * * Helper function for the %SNDCTL_DSP_SPEED ioctl. OSS semantics * demand that all audio operations halt (if they are not already * halted) when the %SNDCTL_DSP_SPEED is given. * * This function halts all audio operations for the given channel * @chan, and then calls via_set_rate to set the audio hardware * to the new rate. */ static int via_chan_set_speed (struct via_info *card, struct via_channel *chan, int val) { DPRINTK ("ENTER, requested rate = %d\n", val); via_chan_clear (card, chan); val = via_set_rate (&card->ac97, chan, val); DPRINTK ("EXIT, returning %d\n", val); return val; } /** * via_chan_set_fmt - Set PCM sample size for given channel * @card: Private info for specified board * @chan: Channel whose sample size will be adjusted * @val: New sample size, use the %AFMT_xxx constants * * Helper function for the %SNDCTL_DSP_SETFMT ioctl. OSS semantics * demand that all audio operations halt (if they are not already * halted) when the %SNDCTL_DSP_SETFMT is given. * * This function halts all audio operations for the given channel * @chan, and then calls via_chan_pcm_fmt to set the audio hardware * to the new sample size, either 8-bit or 16-bit. */ static int via_chan_set_fmt (struct via_info *card, struct via_channel *chan, int val) { DPRINTK ("ENTER, val=%s\n", val == AFMT_U8 ? "AFMT_U8" : val == AFMT_S16_LE ? "AFMT_S16_LE" : "unknown"); via_chan_clear (card, chan); assert (val != AFMT_QUERY); /* this case is handled elsewhere */ switch (val) { case AFMT_S16_LE: if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) { chan->pcm_fmt |= VIA_PCM_FMT_16BIT; via_chan_pcm_fmt (chan, 0); } break; case AFMT_U8: if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) { chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT; via_chan_pcm_fmt (chan, 0); } break; default: DPRINTK ("unknown AFMT: 0x%X\n", val); val = AFMT_S16_LE; } DPRINTK ("EXIT\n"); return val; } /** * via_chan_set_stereo - Enable or disable stereo for a DMA channel * @card: Private info for specified board * @chan: Channel whose stereo setting will be adjusted * @val: New sample size, use the %AFMT_xxx constants * * Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics * demand that all audio operations halt (if they are not already * halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given. * * This function halts all audio operations for the given channel * @chan, and then calls via_chan_pcm_fmt to set the audio hardware * to enable or disable stereo. */ static int via_chan_set_stereo (struct via_info *card, struct via_channel *chan, int val) { DPRINTK ("ENTER, channels = %d\n", val); via_chan_clear (card, chan); switch (val) { /* mono */ case 1: chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO; via_chan_pcm_fmt (chan, 0); break; /* stereo */ case 2: chan->pcm_fmt |= VIA_PCM_FMT_STEREO; via_chan_pcm_fmt (chan, 0); break; /* unknown */ default: printk (KERN_WARNING PFX "unknown number of channels\n"); val = -EINVAL; break; } DPRINTK ("EXIT, returning %d\n", val); return val; } static int via_chan_set_buffering (struct via_info *card, struct via_channel *chan, int val) { int shift; DPRINTK ("ENTER\n"); /* in both cases the buffer cannot be changed */ if (chan->is_active || chan->is_mapped) { DPRINTK ("EXIT\n"); return -EINVAL; } /* called outside SETFRAGMENT */ /* set defaults or do nothing */ if (val < 0) { if (chan->frag_size && chan->frag_number) goto out; DPRINTK ("\n"); chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * ((chan->pcm_fmt & VIA_PCM_FMT_STEREO) ? 2 : 1) * ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1; shift = 0; while (chan->frag_size) { chan->frag_size >>= 1; shift++; } chan->frag_size = 1 << shift; chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME); DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number); } else { chan->frag_size = 1 << (val & 0xFFFF); chan->frag_number = (val >> 16) & 0xFFFF; DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number); } /* quake3 wants frag_number to be a power of two */ shift = 0; while (chan->frag_number) { chan->frag_number >>= 1; shift++; } chan->frag_number = 1 << shift; if (chan->frag_size > VIA_MAX_FRAG_SIZE) chan->frag_size = VIA_MAX_FRAG_SIZE; else if (chan->frag_size < VIA_MIN_FRAG_SIZE) chan->frag_size = VIA_MIN_FRAG_SIZE; if (chan->frag_number < VIA_MIN_FRAG_NUMBER) chan->frag_number = VIA_MIN_FRAG_NUMBER; if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES) chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size; out: if (chan->is_record) atomic_set (&chan->n_frags, 0); else atomic_set (&chan->n_frags, chan->frag_number); DPRINTK ("EXIT\n"); return 0; } #ifdef VIA_CHAN_DUMP_BUFS /** * via_chan_dump_bufs - Display DMA table contents * @chan: Channel whose DMA table will be displayed * * Debugging function which displays the contents of the * scatter-gather DMA table for the given channel @chan. */ static void via_chan_dump_bufs (struct via_channel *chan) { int i; for (i = 0; i < chan->frag_number; i++) { DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n", i, chan->sgtable[i].addr, chan->sgtable[i].count & 0x00FFFFFF, chan->sgtable[i].count & VIA_FLAG ? 1 : 0, chan->sgtable[i].count & VIA_EOL ? 1 : 0); } DPRINTK ("buf_in_use = %d, nextbuf = %d\n", atomic_read (&chan->buf_in_use), atomic_read (&chan->sw_ptr)); } #endif /* VIA_CHAN_DUMP_BUFS */ /** * via_chan_flush_frag - Flush partially-full playback buffer to hardware * @chan: Channel whose DMA table will be displayed * * Flushes partially-full playback buffer to hardware. */ static void via_chan_flush_frag (struct via_channel *chan) { DPRINTK ("ENTER\n"); assert (chan->slop_len > 0); if (chan->sw_ptr == (chan->frag_number - 1)) chan->sw_ptr = 0; else chan->sw_ptr++; chan->slop_len = 0; assert (atomic_read (&chan->n_frags) > 0); atomic_dec (&chan->n_frags); DPRINTK ("EXIT\n"); } /** * via_chan_maybe_start - Initiate audio hardware DMA operation * @chan: Channel whose DMA is to be started * * Initiate DMA operation, if the DMA engine for the given * channel @chan is not already active. */ static inline void via_chan_maybe_start (struct via_channel *chan) { if (!chan->is_active && chan->is_enabled) { chan->is_active = 1; sg_begin (chan); DPRINTK ("starting channel %s\n", chan->name); } } /**************************************************************** * * Interface to ac97-codec module * * */ /** * via_ac97_wait_idle - Wait until AC97 codec is not busy * @card: Private info for specified board * * Sleep until the AC97 codec is no longer busy. * Returns the final value read from the SGD * register being polled. */ static u8 via_ac97_wait_idle (struct via_info *card) { u8 tmp8; int counter = VIA_COUNTER_LIMIT; DPRINTK ("ENTER/EXIT\n"); assert (card != NULL); assert (card->pdev != NULL); do { udelay (15); tmp8 = inb (card->baseaddr + 0x83); } while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0)); if (tmp8 & VIA_CR83_BUSY) printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n"); return tmp8; } /** * via_ac97_read_reg - Read AC97 standard register * @codec: Pointer to generic AC97 codec info * @reg: Index of AC97 register to be read * * Read the value of a single AC97 codec register, * as defined by the Intel AC97 specification. * * Defines the standard AC97 read-register operation * required by the kernel's ac97_codec interface. * * Returns the 16-bit value stored in the specified * register. */ static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg) { unsigned long data; struct via_info *card; int counter; DPRINTK ("ENTER\n"); assert (codec != NULL); assert (codec->private_data != NULL); card = codec->private_data; data = (reg << 16) | VIA_CR80_READ; outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL); udelay (20); for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) { if (inl (card->baseaddr + 0x80) & VIA_CR80_VALID) goto out; udelay (15); } printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data); goto err_out; out: data = (unsigned long) inl (card->baseaddr + 0x80); outb (0x02, card->baseaddr + 0x83); if (((data & 0x007F0000) >> 16) == reg) { DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n", data, data & 0x0000FFFF); return data & 0x0000FFFF; } printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n", reg, ((data & 0x007F0000) >> 16)); err_out: DPRINTK ("EXIT, returning 0\n"); return 0; } /** * via_ac97_write_reg - Write AC97 standard register * @codec: Pointer to generic AC97 codec info * @reg: Index of AC97 register to be written * @value: Value to be written to AC97 register * * Write the value of a single AC97 codec register, * as defined by the Intel AC97 specification. * * Defines the standard AC97 write-register operation * required by the kernel's ac97_codec interface. */ static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value) { u32 data; struct via_info *card; int counter; DPRINTK ("ENTER\n"); assert (codec != NULL); assert (codec->private_data != NULL); card = codec->private_data; data = (reg << 16) + value; outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL); udelay (10); for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) { if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0) goto out; udelay (15); } printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value); out: DPRINTK ("EXIT\n"); } static int via_mixer_open (struct inode *inode, struct file *file) { int minor = MINOR(inode->i_rdev); struct via_info *card; struct pci_dev *pdev; struct pci_driver *drvr; DPRINTK ("ENTER\n"); pci_for_each_dev(pdev) { drvr = pci_dev_driver (pdev); if (drvr == &via_driver) { assert (pci_get_drvdata (pdev) != NULL); card = pci_get_drvdata (pdev); if (card->ac97.dev_mixer == minor) goto match; } } DPRINTK ("EXIT, returning -ENODEV\n"); return -ENODEV; match: file->private_data = &card->ac97; DPRINTK ("EXIT, returning 0\n"); return 0; } static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct ac97_codec *codec = file->private_data; struct via_info *card; int nonblock = (file->f_flags & O_NONBLOCK); int rc; DPRINTK ("ENTER\n"); assert (codec != NULL); card = codec->private_data; assert (card != NULL); rc = via_syscall_down (card, nonblock); if (rc) goto out; rc = codec->mixer_ioctl(codec, cmd, arg); up (&card->syscall_sem); out: DPRINTK ("EXIT, returning %d\n", rc); return rc; } static loff_t via_llseek(struct file *file, loff_t offset, int origin) { DPRINTK ("ENTER\n"); DPRINTK ("EXIT, returning -ESPIPE\n"); return -ESPIPE; } static struct file_operations via_mixer_fops = { owner: THIS_MODULE, open: via_mixer_open, llseek: via_llseek, ioctl: via_mixer_ioctl, }; static int __init via_ac97_reset (struct via_info *card) { struct pci_dev *pdev = card->pdev; u8 tmp8; u16 tmp16; DPRINTK ("ENTER\n"); assert (pdev != NULL); #ifndef NDEBUG { u8 r40,r41,r42,r43,r44,r48; pci_read_config_byte (card->pdev, 0x40, &r40); pci_read_config_byte (card->pdev, 0x41, &r41); pci_read_config_byte (card->pdev, 0x42, &r42); pci_read_config_byte (card->pdev, 0x43, &r43); pci_read_config_byte (card->pdev, 0x44, &r44); pci_read_config_byte (card->pdev, 0x48, &r48); DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n", r40,r41,r42,r43,r44,r48); spin_lock_irq (&card->lock); DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n", inb (card->baseaddr + 0x00), inb (card->baseaddr + 0x01), inb (card->baseaddr + 0x02), inl (card->baseaddr + 0x04), inl (card->baseaddr + 0x0C), inl (card->baseaddr + 0x80), inl (card->baseaddr + 0x84)); spin_unlock_irq (&card->lock); } #endif /* * reset AC97 controller: enable, disable, enable * pause after each command for good luck */ pci_write_config_byte (pdev, VIA_ACLINK_CTRL, VIA_CR41_AC97_ENABLE | VIA_CR41_AC97_RESET | VIA_CR41_AC97_WAKEUP); udelay (100); pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0); udelay (100); pci_write_config_byte (pdev, VIA_ACLINK_CTRL, VIA_CR41_AC97_ENABLE | VIA_CR41_PCM_ENABLE | VIA_CR41_VRA | VIA_CR41_AC97_RESET); udelay (100); #if 0 /* this breaks on K7M */ /* disable legacy stuff */ pci_write_config_byte (pdev, 0x42, 0x00); udelay(10); #endif /* route FM trap to IRQ, disable FM trap */ pci_write_config_byte (pdev, 0x48, 0x05); udelay(10); /* disable all codec GPI interrupts */ outl (0, pci_resource_start (pdev, 0) + 0x8C); /* WARNING: this line is magic. Remove this * and things break. */ /* enable variable rate, variable rate MIC ADC */ /* * If we cannot enable VRA, we have a locked-rate codec. * We try again to enable VRA before assuming so, however. */ tmp16 = via_ac97_read_reg (&card->ac97, AC97_EXTENDED_STATUS); if ((tmp16 & 1) == 0) { via_ac97_write_reg (&card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1); tmp16 = via_ac97_read_reg (&card->ac97, AC97_EXTENDED_STATUS); if ((tmp16 & 1) == 0) { card->locked_rate = 1; printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n"); } } DPRINTK ("EXIT, returning 0\n"); return 0; } static void via_ac97_codec_wait (struct ac97_codec *codec) { assert (codec->private_data != NULL); via_ac97_wait_idle (codec->private_data); } static int __init via_ac97_init (struct via_info *card) { int rc; u16 tmp16; DPRINTK ("ENTER\n"); assert (card != NULL); memset (&card->ac97, 0, sizeof (card->ac97)); card->ac97.private_data = card; card->ac97.codec_read = via_ac97_read_reg; card->ac97.codec_write = via_ac97_write_reg; card->ac97.codec_wait = via_ac97_codec_wait; card->ac97.dev_mixer = register_sound_mixer (&via_mixer_fops, -1); if (card->ac97.dev_mixer < 0) { printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n"); DPRINTK ("EXIT, returning -EIO\n"); return -EIO; } rc = via_ac97_reset (card); if (rc) { printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n"); goto err_out; } if (ac97_probe_codec (&card->ac97) == 0) { printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n"); rc = -EIO; goto err_out; } /* enable variable rate, variable rate MIC ADC */ tmp16 = via_ac97_read_reg (&card->ac97, AC97_EXTENDED_STATUS); via_ac97_write_reg (&card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1); DPRINTK ("EXIT, returning 0\n"); return 0; err_out: unregister_sound_mixer (card->ac97.dev_mixer); DPRINTK ("EXIT, returning %d\n", rc); return rc; } static void via_ac97_cleanup (struct via_info *card) { DPRINTK ("ENTER\n"); assert (card != NULL); assert (card->ac97.dev_mixer >= 0); unregister_sound_mixer (card->ac97.dev_mixer); DPRINTK ("EXIT\n"); } /**************************************************************** * * Interrupt-related code * */ /** * via_intr_channel - handle an interrupt for a single channel * @chan: handle interrupt for this channel * * This is the "meat" of the interrupt handler, * containing the actions taken each time an interrupt * occurs. All communication and coordination with * userspace takes place here. * * Locking: inside card->lock */ static void via_intr_channel (struct via_channel *chan) { u8 status; int n; /* check pertinent bits of status register for action bits */ status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED); if (!status) return; /* acknowledge any flagged bits ASAP */ outb (status, chan->iobase); if (!chan->sgtable) /* XXX: temporary solution */ return; /* grab current h/w ptr value */ n = atomic_read (&chan->hw_ptr); /* sanity check: make sure our h/w ptr doesn't have a weird value */ assert (n >= 0); assert (n < chan->frag_number); /* reset SGD data structure in memory to reflect a full buffer, * and advance the h/w ptr, wrapping around to zero if needed */ if (n == (chan->frag_number - 1)) { chan->sgtable[n].count = (chan->frag_size | VIA_EOL); atomic_set (&chan->hw_ptr, 0); } else { chan->sgtable[n].count = (chan->frag_size | VIA_FLAG); atomic_inc (&chan->hw_ptr); } /* accounting crap for SNDCTL_DSP_GETxPTR */ chan->n_irqs++; chan->bytes += chan->frag_size; if (chan->bytes < 0) /* handle overflow of 31-bit value */ chan->bytes = chan->frag_size; /* wake up anyone listening to see when interrupts occur */ if (waitqueue_active (&chan->wait)) wake_up_all (&chan->wait); DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n", chan->name, status, (long) inl (chan->iobase + 0x04), atomic_read (&chan->hw_ptr)); /* all following checks only occur when not in mmap(2) mode */ if (chan->is_mapped) return; /* If we are recording, then n_frags represents the number * of fragments waiting to be handled by userspace. * If we are playback, then n_frags represents the number * of fragments remaining to be filled by userspace. * We increment here. If we reach max number of fragments, * this indicates an underrun/overrun. For this case under OSS, * we stop the record/playback process. */ if (atomic_read (&chan->n_frags) < chan->frag_number) atomic_inc (&chan->n_frags); assert (atomic_read (&chan->n_frags) <= chan->frag_number); if (atomic_read (&chan->n_frags) == chan->frag_number) { chan->is_active = 0; via_chan_stop (chan->iobase); } DPRINTK ("%s intr, channel n_frags == %d\n", chan->name, atomic_read (&chan->n_frags)); } static void via_interrupt(int irq, void *dev_id, struct pt_regs *regs) { struct via_info *card = dev_id; u32 status32; /* to minimize interrupt sharing costs, we use the SGD status * shadow register to check the status of all inputs and * outputs with a single 32-bit bus read. If no interrupt * conditions are flagged, we exit immediately */ status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW); if (!(status32 & VIA_INTR_MASK)) return; DPRINTK ("intr, status32 == 0x%08X\n", status32); /* synchronize interrupt handling under SMP. this spinlock * goes away completely on UP */ spin_lock (&card->lock); if (status32 & VIA_INTR_OUT) via_intr_channel (&card->ch_out); if (status32 & VIA_INTR_IN) via_intr_channel (&card->ch_in); if (status32 & VIA_INTR_FM) via_intr_channel (&card->ch_fm); spin_unlock (&card->lock); } /** * via_interrupt_disable - Disable all interrupt-generating sources * @card: Private info for specified board * * Disables all interrupt-generation flags in the Via * audio hardware registers. */ static void via_interrupt_disable (struct via_info *card) { u8 tmp8; unsigned long flags; DPRINTK ("ENTER\n"); assert (card != NULL); spin_lock_irqsave (&card->lock, flags); pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8); if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) { tmp8 |= VIA_CR48_FM_TRAP_TO_NMI; pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8); } outb (inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE) & VIA_INT_DISABLE_MASK, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE); outb (inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE) & VIA_INT_DISABLE_MASK, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE); outb (inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE) & VIA_INT_DISABLE_MASK, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE); spin_unlock_irqrestore (&card->lock, flags); DPRINTK ("EXIT\n"); } /** * via_interrupt_init - Initialize interrupt handling * @card: Private info for specified board * * Obtain and reserve IRQ for using in handling audio events. * Also, disable any IRQ-generating resources, to make sure * we don't get interrupts before we want them. */ static int via_interrupt_init (struct via_info *card) { DPRINTK ("ENTER\n"); assert (card != NULL); assert (card->pdev != NULL); /* check for sane IRQ number. can this ever happen? */ if (card->pdev->irq < 2) { printk (KERN_ERR PFX "insane IRQ %d, aborting\n", card->pdev->irq); DPRINTK ("EXIT, returning -EIO\n"); return -EIO; } if (request_irq (card->pdev->irq, via_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) { printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n", card->pdev->irq); DPRINTK ("EXIT, returning -EBUSY\n"); return -EBUSY; } /* we don't want interrupts until we're opened */ via_interrupt_disable (card); DPRINTK ("EXIT, returning 0\n"); return 0; } /** * via_interrupt_cleanup - Shutdown driver interrupt handling * @card: Private info for specified board * * Disable any potential interrupt sources in the Via audio * hardware, and then release (un-reserve) the IRQ line * in the kernel core. */ static void via_interrupt_cleanup (struct via_info *card) { DPRINTK ("ENTER\n"); assert (card != NULL); assert (card->pdev != NULL); via_interrupt_disable (card); free_irq (card->pdev->irq, card); DPRINTK ("EXIT\n"); } /**************************************************************** * * OSS DSP device * */ static struct file_operations via_dsp_fops = { owner: THIS_MODULE, open: via_dsp_open, release: via_dsp_release, read: via_dsp_read, write: via_dsp_write, poll: via_dsp_poll, llseek: via_llseek, ioctl: via_dsp_ioctl, mmap: via_dsp_mmap, }; static int __init via_dsp_init (struct via_info *card) { u8 tmp8; DPRINTK ("ENTER\n"); assert (card != NULL); /* turn off legacy features, if not already */ pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8); if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_MIDI_ENABLE | VIA_CR42_FM_ENABLE)) { tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_MIDI_ENABLE | VIA_CR42_FM_ENABLE); pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8); } via_stop_everything (card); card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1); if (card->dev_dsp < 0) { DPRINTK ("EXIT, returning -ENODEV\n"); return -ENODEV; } DPRINTK ("EXIT, returning 0\n"); return 0; } static void via_dsp_cleanup (struct via_info *card) { DPRINTK ("ENTER\n"); assert (card != NULL); assert (card->dev_dsp >= 0); via_stop_everything (card); unregister_sound_dsp (card->dev_dsp); DPRINTK ("EXIT\n"); } static struct page * via_mm_nopage (struct vm_area_struct * vma, unsigned long address, int write_access) { struct via_info *card = vma->vm_private_data; struct via_channel *chan = &card->ch_out; struct page *dmapage; unsigned long pgoff; int rd, wr; DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh, wr %d\n", vma->vm_start, address - vma->vm_start, (address - vma->vm_start) >> PAGE_SHIFT, address, write_access); if (address > vma->vm_end) { DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n"); return NOPAGE_SIGBUS; /* Disallow mremap */ } if (!card) { DPRINTK ("EXIT, returning NOPAGE_OOM\n"); return NOPAGE_OOM; /* Nothing allocated */ } pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT); rd = card->ch_in.is_mapped; wr = card->ch_out.is_mapped; #ifndef VIA_NDEBUG { unsigned long max_bufs = chan->frag_number; if (rd && wr) max_bufs *= 2; /* via_dsp_mmap() should ensure this */ assert (pgoff < max_bufs); } #endif /* if full-duplex (read+write) and we have two sets of bufs, * then the playback buffers come first, sez soundcard.c */ if (pgoff >= chan->page_number) { pgoff -= chan->page_number; chan = &card->ch_in; } else if (!wr) chan = &card->ch_in; assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0); dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr); DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n", dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr); get_page (dmapage); return dmapage; } #ifndef VM_RESERVED static int via_mm_swapout (struct page *page, struct file *filp) { return 0; } #endif /* VM_RESERVED */ struct vm_operations_struct via_mm_ops = { nopage: via_mm_nopage, #ifndef VM_RESERVED swapout: via_mm_swapout, #endif }; static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma) { struct via_info *card; int nonblock = (file->f_flags & O_NONBLOCK); int rc = -EINVAL, rd=0, wr=0; unsigned long max_size, size, start, offset; assert (file != NULL); assert (vma != NULL); card = file->private_data; assert (card != NULL); DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n", vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_pgoff); max_size = 0; if (vma->vm_flags & VM_READ) { rd = 1; via_chan_set_buffering(card, &card->ch_in, -1); via_chan_buffer_init (card, &card->ch_in); max_size += card->ch_in.page_number << PAGE_SHIFT; } if (vma->vm_flags & VM_WRITE) { wr = 1; via_chan_set_buffering(card, &card->ch_out, -1); via_chan_buffer_init (card, &card->ch_out); max_size += card->ch_out.page_number << PAGE_SHIFT; } start = vma->vm_start; offset = (vma->vm_pgoff << PAGE_SHIFT); size = vma->vm_end - vma->vm_start; /* some basic size/offset sanity checks */ if (size > max_size) goto out; if (offset > max_size - size) goto out; rc = via_syscall_down (card, nonblock); if (rc) goto out; vma->vm_ops = &via_mm_ops; vma->vm_private_data = card; #ifdef VM_RESERVED vma->vm_flags |= VM_RESERVED; #endif if (rd) card->ch_in.is_mapped = 1; if (wr) card->ch_out.is_mapped = 1; up (&card->syscall_sem); rc = 0; out: DPRINTK ("EXIT, returning %d\n", rc); return rc; } static ssize_t via_dsp_do_read (struct via_info *card, char *userbuf, size_t count, int nonblock) { const char *orig_userbuf = userbuf; struct via_channel *chan = &card->ch_in; size_t size; int n, tmp; /* if SGD has not yet been started, start it */ via_chan_maybe_start (chan); handle_one_block: /* just to be a nice neighbor */ if (current->need_resched) schedule (); /* grab current channel software pointer. In the case of * recording, this is pointing to the next buffer that * will receive data from the audio hardware. */ n = chan->sw_ptr; /* n_frags represents the number of fragments waiting * to be copied to userland. sleep until at least * one buffer has been read from the audio hardware. */ tmp = atomic_read (&chan->n_frags); assert (tmp >= 0); assert (tmp <= chan->frag_number); while (tmp == 0) { if (nonblock || !chan->is_active) return -EAGAIN; DPRINTK ("Sleeping on block %d\n", n); interruptible_sleep_on (&chan->wait); if (signal_pending (current)) return -ERESTARTSYS; tmp = atomic_read (&chan->n_frags); } /* Now that we have a buffer we can read from, send * as much as sample data possible to userspace. */ while ((count > 0) && (chan->slop_len < chan->frag_size)) { size_t slop_left = chan->frag_size - chan->slop_len; size = (count < slop_left) ? count : slop_left; if (copy_to_user (userbuf, chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + n % (PAGE_SIZE / chan->frag_size) + chan->slop_len, size)) return -EFAULT; count -= size; chan->slop_len += size; userbuf += size; } /* If we didn't copy the buffer completely to userspace, * stop now. */ if (chan->slop_len < chan->frag_size) goto out; /* * If we get to this point, we copied one buffer completely * to userspace, give the buffer back to the hardware. */ /* advance channel software pointer to point to * the next buffer from which we will copy */ if (chan->sw_ptr == (chan->frag_number - 1)) chan->sw_ptr = 0; else chan->sw_ptr++; /* mark one less buffer waiting to be processed */ assert (atomic_read (&chan->n_frags) > 0); atomic_dec (&chan->n_frags); /* we are at a block boundary, there is no fragment data */ chan->slop_len = 0; DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n", n, chan->sw_ptr, atomic_read (&chan->n_frags)); DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n", inb (card->baseaddr + 0x00), inb (card->baseaddr + 0x01), inb (card->baseaddr + 0x02), inl (card->baseaddr + 0x04), inl (card->baseaddr + 0x0C), inl (card->baseaddr + 0x80), inl (card->baseaddr + 0x84)); if (count > 0) goto handle_one_block; out: return userbuf - orig_userbuf; } static ssize_t via_dsp_read(struct file *file, char *buffer, size_t count, loff_t *ppos) { struct via_info *card; int nonblock = (file->f_flags & O_NONBLOCK); int rc; DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n", file, buffer, count, ppos ? ((unsigned long)*ppos) : 0); assert (file != NULL); assert (buffer != NULL); card = file->private_data; assert (card != NULL); if (ppos != &file->f_pos) { DPRINTK ("EXIT, returning -ESPIPE\n"); return -ESPIPE; } rc = via_syscall_down (card, nonblock); if (rc) goto out; if (card->ch_in.is_mapped) { rc = -ENXIO; goto out_up; } via_chan_set_buffering(card, &card->ch_in, -1); rc = via_chan_buffer_init (card, &card->ch_in); if (rc) goto out_up; rc = via_dsp_do_read (card, buffer, count, nonblock); out_up: up (&card->syscall_sem); out: DPRINTK ("EXIT, returning %ld\n",(long) rc); return rc; } static ssize_t via_dsp_do_write (struct via_info *card, const char *userbuf, size_t count, int nonblock) { const char *orig_userbuf = userbuf; struct via_channel *chan = &card->ch_out; volatile struct via_sgd_table *sgtable = chan->sgtable; size_t size; int n, tmp; handle_one_block: /* just to be a nice neighbor */ if (current->need_resched) schedule (); /* grab current channel fragment pointer. In the case of * playback, this is pointing to the next fragment that * should receive data from userland. */ n = chan->sw_ptr; /* n_frags represents the number of fragments remaining * to be filled by userspace. Sleep until * at least one fragment is available for our use. */ tmp = atomic_read (&chan->n_frags); assert (tmp >= 0); assert (tmp <= chan->frag_number); while (tmp == 0) { if (nonblock || !chan->is_enabled) return -EAGAIN; DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record); interruptible_sleep_on (&chan->wait); if (signal_pending (current)) return -ERESTARTSYS; tmp = atomic_read (&chan->n_frags); } /* Now that we have at least one fragment we can write to, fill the buffer * as much as possible with data from userspace. */ while ((count > 0) && (chan->slop_len < chan->frag_size)) { size_t slop_left = chan->frag_size - chan->slop_len; size = (count < slop_left) ? count : slop_left; if (copy_from_user (chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size + chan->slop_len, userbuf, size)) return -EFAULT; count -= size; chan->slop_len += size; userbuf += size; } /* If we didn't fill up the buffer with data, stop now. * Put a 'stop' marker in the DMA table too, to tell the * audio hardware to stop if it gets here. */ if (chan->slop_len < chan->frag_size) { sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP); goto out; } /* * If we get to this point, we have filled a buffer with * audio data, flush the buffer to audio hardware. */ /* Record the true size for the audio hardware to notice */ if (n == (chan->frag_number - 1)) sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL); else sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG); /* advance channel software pointer to point to * the next buffer we will fill with data */ if (chan->sw_ptr == (chan->frag_number - 1)) chan->sw_ptr = 0; else chan->sw_ptr++; /* mark one less buffer as being available for userspace consumption */ assert (atomic_read (&chan->n_frags) > 0); atomic_dec (&chan->n_frags); /* we are at a block boundary, there is no fragment data */ chan->slop_len = 0; /* if SGD has not yet been started, start it */ via_chan_maybe_start (chan); DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n", n, chan->sw_ptr, atomic_read (&chan->n_frags)); DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n", inb (card->baseaddr + 0x00), inb (card->baseaddr + 0x01), inb (card->baseaddr + 0x02), inl (card->baseaddr + 0x04), inl (card->baseaddr + 0x0C), inl (card->baseaddr + 0x80), inl (card->baseaddr + 0x84)); if (count > 0) goto handle_one_block; out: return userbuf - orig_userbuf; } static ssize_t via_dsp_write(struct file *file, const char *buffer, size_t count, loff_t *ppos) { struct via_info *card; ssize_t rc; int nonblock = (file->f_flags & O_NONBLOCK); DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n", file, buffer, count, ppos ? ((unsigned long)*ppos) : 0); assert (file != NULL); assert (buffer != NULL); card = file->private_data; assert (card != NULL); if (ppos != &file->f_pos) { DPRINTK ("EXIT, returning -ESPIPE\n"); return -ESPIPE; } rc = via_syscall_down (card, nonblock); if (rc) goto out; if (card->ch_out.is_mapped) { rc = -ENXIO; goto out_up; } via_chan_set_buffering(card, &card->ch_out, -1); rc = via_chan_buffer_init (card, &card->ch_out); if (rc) goto out_up; rc = via_dsp_do_write (card, buffer, count, nonblock); out_up: up (&card->syscall_sem); out: DPRINTK ("EXIT, returning %ld\n",(long) rc); return rc; } static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait) { struct via_info *card; unsigned int mask = 0, rd, wr; DPRINTK ("ENTER\n"); assert (file != NULL); card = file->private_data; assert (card != NULL); rd = (file->f_mode & FMODE_READ); wr = (file->f_mode & FMODE_WRITE); if (wr && (atomic_read (&card->ch_out.n_frags) == 0)) { assert (card->ch_out.is_active); poll_wait(file, &card->ch_out.wait, wait); } if (rd) { /* XXX is it ok, spec-wise, to start DMA here? */ if (!card->ch_in.is_active) { via_chan_set_buffering(card, &card->ch_in, -1); via_chan_buffer_init(card, &card->ch_in); } via_chan_maybe_start (&card->ch_in); if (atomic_read (&card->ch_in.n_frags) == 0) poll_wait(file, &card->ch_in.wait, wait); } if (wr && ((atomic_read (&card->ch_out.n_frags) > 0) || !card->ch_out.is_active)) mask |= POLLOUT | POLLWRNORM; if (rd && (atomic_read (&card->ch_in.n_frags) > 0)) mask |= POLLIN | POLLRDNORM; DPRINTK ("EXIT, returning %u\n", mask); return mask; } /** * via_dsp_drain_playback - sleep until all playback samples are flushed * @card: Private info for specified board * @chan: Channel to drain * @nonblock: boolean, non-zero if O_NONBLOCK is set * * Sleeps until all playback has been flushed to the audio * hardware. * * Locking: inside card->syscall_sem */ static int via_dsp_drain_playback (struct via_info *card, struct via_channel *chan, int nonblock) { DPRINTK ("ENTER, nonblock = %d\n", nonblock); if (chan->slop_len > 0) via_chan_flush_frag (chan); if (atomic_read (&chan->n_frags) == chan->frag_number) goto out; via_chan_maybe_start (chan); while (atomic_read (&chan->n_frags) < chan->frag_number) { if (nonblock) { DPRINTK ("EXIT, returning -EAGAIN\n"); return -EAGAIN; } #ifdef VIA_DEBUG { u8 r40,r41,r42,r43,r44,r48; pci_read_config_byte (card->pdev, 0x40, &r40); pci_read_config_byte (card->pdev, 0x41, &r41); pci_read_config_byte (card->pdev, 0x42, &r42); pci_read_config_byte (card->pdev, 0x43, &r43); pci_read_config_byte (card->pdev, 0x44, &r44); pci_read_config_byte (card->pdev, 0x48, &r48); DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n", r40,r41,r42,r43,r44,r48); DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n", inb (card->baseaddr + 0x00), inb (card->baseaddr + 0x01), inb (card->baseaddr + 0x02), inl (card->baseaddr + 0x04), inl (card->baseaddr + 0x0C), inl (card->baseaddr + 0x80), inl (card->baseaddr + 0x84)); } if (!chan->is_active) printk (KERN_ERR "sleeping but not active\n"); #endif DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags)); interruptible_sleep_on (&chan->wait); if (signal_pending (current)) { DPRINTK ("EXIT, returning -ERESTARTSYS\n"); return -ERESTARTSYS; } } #ifdef VIA_DEBUG { u8 r40,r41,r42,r43,r44,r48; pci_read_config_byte (card->pdev, 0x40, &r40); pci_read_config_byte (card->pdev, 0x41, &r41); pci_read_config_byte (card->pdev, 0x42, &r42); pci_read_config_byte (card->pdev, 0x43, &r43); pci_read_config_byte (card->pdev, 0x44, &r44); pci_read_config_byte (card->pdev, 0x48, &r48); DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n", r40,r41,r42,r43,r44,r48); DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n", inb (card->baseaddr + 0x00), inb (card->baseaddr + 0x01), inb (card->baseaddr + 0x02), inl (card->baseaddr + 0x04), inl (card->baseaddr + 0x0C), inl (card->baseaddr + 0x80), inl (card->baseaddr + 0x84)); DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags)); } #endif out: DPRINTK ("EXIT, returning 0\n"); return 0; } /** * via_dsp_ioctl_space - get information about channel buffering * @card: Private info for specified board * @chan: pointer to channel-specific info * @arg: user buffer for returned information * * Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE. * * Locking: inside card->syscall_sem */ static int via_dsp_ioctl_space (struct via_info *card, struct via_channel *chan, void *arg) { audio_buf_info info; via_chan_set_buffering(card, chan, -1); info.fragstotal = chan->frag_number; info.fragsize = chan->frag_size; /* number of full fragments we can read/write without blocking */ info.fragments = atomic_read (&chan->n_frags); if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0)) info.fragments--; /* number of bytes that can be read or written immediately * without blocking. */ info.bytes = (info.fragments * chan->frag_size); if (chan->slop_len % chan->frag_size > 0) info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size); DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n", info.fragstotal, info.fragsize, info.fragments, info.bytes); return copy_to_user (arg, &info, sizeof (info)); } /** * via_dsp_ioctl_ptr - get information about hardware buffer ptr * @card: Private info for specified board * @chan: pointer to channel-specific info * @arg: user buffer for returned information * * Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR. * * Locking: inside card->syscall_sem */ static int via_dsp_ioctl_ptr (struct via_info *card, struct via_channel *chan, void *arg) { count_info info; spin_lock_irq (&card->lock); info.bytes = chan->bytes; info.blocks = chan->n_irqs; chan->n_irqs = 0; spin_unlock_irq (&card->lock); if (chan->is_active) { unsigned long extra; info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size; extra = chan->frag_size - inl (chan->iobase + VIA_PCM_BLOCK_COUNT); info.ptr += extra; info.bytes += extra; } else { info.ptr = 0; } DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n", info.bytes, info.blocks, info.ptr); return copy_to_user (arg, &info, sizeof (info)); } static int via_dsp_ioctl_trigger (struct via_channel *chan, int val) { int enable, do_something; if (chan->is_record) enable = (val & PCM_ENABLE_INPUT); else enable = (val & PCM_ENABLE_OUTPUT); if (!chan->is_enabled && enable) { do_something = 1; } else if (chan->is_enabled && !enable) { do_something = -1; } else { do_something = 0; } DPRINTK ("enable=%d, do_something=%d\n", enable, do_something); if (chan->is_active && do_something) return -EINVAL; if (do_something == 1) { chan->is_enabled = 1; via_chan_maybe_start (chan); DPRINTK ("Triggering input\n"); } else if (do_something == -1) { chan->is_enabled = 0; DPRINTK ("Setup input trigger\n"); } return 0; } static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { int rc, rd=0, wr=0, val=0; struct via_info *card; struct via_channel *chan; int nonblock = (file->f_flags & O_NONBLOCK); assert (file != NULL); card = file->private_data; assert (card != NULL); if (file->f_mode & FMODE_WRITE) wr = 1; if (file->f_mode & FMODE_READ) rd = 1; rc = via_syscall_down (card, nonblock); if (rc) return rc; rc = -EINVAL; switch (cmd) { /* OSS API version. XXX unverified */ case OSS_GETVERSION: DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n"); rc = put_user (SOUND_VERSION, (int *)arg); break; /* list of supported PCM data formats */ case SNDCTL_DSP_GETFMTS: DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n"); rc = put_user (AFMT_U8 | AFMT_S16_LE, (int *)arg); break; /* query or set current channel's PCM data format */ case SNDCTL_DSP_SETFMT: if (get_user(val, (int *)arg)) { rc = -EFAULT; break; } DPRINTK ("DSP_SETFMT, val==%d\n", val); if (val != AFMT_QUERY) { rc = 0; if (rd) rc = via_chan_set_fmt (card, &card->ch_in, val); if (rc >= 0 && wr) rc = via_chan_set_fmt (card, &card->ch_out, val); if (rc < 0) break; val = rc; } else { if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) || (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT))) val = AFMT_S16_LE; else val = AFMT_U8; } DPRINTK ("SETFMT EXIT, returning %d\n", val); rc = put_user (val, (int *)arg); break; /* query or set number of channels (1=mono, 2=stereo) */ case SNDCTL_DSP_CHANNELS: if (get_user(val, (int *)arg)) { rc = -EFAULT; break; } DPRINTK ("DSP_CHANNELS, val==%d\n", val); if (val != 0) { rc = 0; if (rd) rc = via_chan_set_stereo (card, &card->ch_in, val); if (rc >= 0 && wr) rc = via_chan_set_stereo (card, &card->ch_out, val); if (rc < 0) break; val = rc; } else { if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_STEREO)) || (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_STEREO))) val = 2; else val = 1; } DPRINTK ("CHANNELS EXIT, returning %d\n", val); rc = put_user (val, (int *)arg); break; /* enable (val is not zero) or disable (val == 0) stereo */ case SNDCTL_DSP_STEREO: if (get_user(val, (int *)arg)) { rc = -EFAULT; break; } DPRINTK ("DSP_STEREO, val==%d\n", val); rc = 0; if (rd) rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1); if (rc >= 0 && wr) rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1); if (rc < 0) break; val = rc - 1; DPRINTK ("STEREO EXIT, returning %d\n", val); rc = put_user(val, (int *) arg); break; /* query or set sampling rate */ case SNDCTL_DSP_SPEED: if (get_user(val, (int *)arg)) { rc = -EFAULT; break; } DPRINTK ("DSP_SPEED, val==%d\n", val); if (val < 0) { rc = -EINVAL; break; } if (val > 0) { rc = 0; if (rd) rc = via_chan_set_speed (card, &card->ch_in, val); if (rc >= 0 && wr) rc = via_chan_set_speed (card, &card->ch_out, val); if (rc < 0) break; val = rc; } else { if (rd) val = card->ch_in.rate; else if (wr) val = card->ch_out.rate; else val = 0; } DPRINTK ("SPEED EXIT, returning %d\n", val); rc = put_user (val, (int *)arg); break; /* wait until all buffers have been played, and then stop device */ case SNDCTL_DSP_SYNC: DPRINTK ("DSP_SYNC\n"); if (wr) { DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n"); rc = via_dsp_drain_playback (card, &card->ch_out, nonblock); } break; /* stop recording/playback immediately */ case SNDCTL_DSP_RESET: DPRINTK ("DSP_RESET\n"); if (rd) { via_chan_clear (card, &card->ch_in); via_chan_pcm_fmt (&card->ch_in, 1); card->ch_in.frag_number = 0; card->ch_in.frag_size = 0; atomic_set(&card->ch_in.n_frags, 0); } if (wr) { via_chan_clear (card, &card->ch_out); via_chan_pcm_fmt (&card->ch_out, 1); card->ch_out.frag_number = 0; card->ch_out.frag_size = 0; atomic_set(&card->ch_out.n_frags, 0); } rc = 0; break; /* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */ case SNDCTL_DSP_GETCAPS: DPRINTK ("DSP_GETCAPS\n"); rc = put_user(VIA_DSP_CAP, (int *)arg); break; /* obtain buffer fragment size */ case SNDCTL_DSP_GETBLKSIZE: DPRINTK ("DSP_GETBLKSIZE\n"); if (rd) { via_chan_set_buffering(card, &card->ch_in, -1); rc = put_user(card->ch_in.frag_size, (int *)arg); } else if (wr) { via_chan_set_buffering(card, &card->ch_out, -1); rc = put_user(card->ch_out.frag_size, (int *)arg); } break; /* obtain information about input buffering */ case SNDCTL_DSP_GETISPACE: DPRINTK ("DSP_GETISPACE\n"); if (rd) rc = via_dsp_ioctl_space (card, &card->ch_in, (void*) arg); break; /* obtain information about output buffering */ case SNDCTL_DSP_GETOSPACE: DPRINTK ("DSP_GETOSPACE\n"); if (wr) rc = via_dsp_ioctl_space (card, &card->ch_out, (void*) arg); break; /* obtain information about input hardware pointer */ case SNDCTL_DSP_GETIPTR: DPRINTK ("DSP_GETIPTR\n"); if (rd) rc = via_dsp_ioctl_ptr (card, &card->ch_in, (void*) arg); break; /* obtain information about output hardware pointer */ case SNDCTL_DSP_GETOPTR: DPRINTK ("DSP_GETOPTR\n"); if (wr) rc = via_dsp_ioctl_ptr (card, &card->ch_out, (void*) arg); break; /* return number of bytes remaining to be played by DMA engine */ case SNDCTL_DSP_GETODELAY: { DPRINTK ("DSP_GETODELAY\n"); chan = &card->ch_out; if (!wr) break; if (chan->is_active) { val = chan->frag_number - atomic_read (&chan->n_frags); if (val > 0) { val *= chan->frag_size; val -= chan->frag_size - inl (chan->iobase + VIA_PCM_BLOCK_COUNT); } val += chan->slop_len % chan->frag_size; } else val = 0; assert (val <= (chan->frag_size * chan->frag_number)); DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val); rc = put_user (val, (int *)arg); break; } /* handle the quick-start of a channel, * or the notification that a quick-start will * occur in the future */ case SNDCTL_DSP_SETTRIGGER: if (get_user(val, (int *)arg)) { rc = -EFAULT; break; } DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n", rd, wr, card->ch_in.is_active, card->ch_out.is_active, card->ch_in.is_enabled, card->ch_out.is_enabled); rc = 0; if (rd) rc = via_dsp_ioctl_trigger (&card->ch_in, val); if (!rc && wr) rc = via_dsp_ioctl_trigger (&card->ch_out, val); break; /* Enable full duplex. Since we do this as soon as we are opened * with O_RDWR, this is mainly a no-op that always returns success. */ case SNDCTL_DSP_SETDUPLEX: DPRINTK ("DSP_SETDUPLEX\n"); if (!rd || !wr) break; rc = 0; break; /* set fragment size. implemented as a successful no-op for now */ case SNDCTL_DSP_SETFRAGMENT: if (get_user(val, (int *)arg)) { rc = -EFAULT; break; } DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val); if (rd) rc = via_chan_set_buffering(card, &card->ch_in, val); if (wr) rc = via_chan_set_buffering(card, &card->ch_out, val); DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n", val & 0xFFFF, val & 0xFFFF, (val >> 16) & 0xFFFF, (val >> 16) & 0xFFFF); rc = 0; break; /* inform device of an upcoming pause in input (or output). */ case SNDCTL_DSP_POST: DPRINTK ("DSP_POST\n"); if (wr) { if (card->ch_out.slop_len > 0) via_chan_flush_frag (&card->ch_out); via_chan_maybe_start (&card->ch_out); } rc = 0; break; /* not implemented */ default: DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n", cmd, (void*) arg); break; } up (&card->syscall_sem); DPRINTK ("EXIT, returning %d\n", rc); return rc; } static int via_dsp_open (struct inode *inode, struct file *file) { int minor = MINOR(inode->i_rdev); struct via_info *card; struct pci_dev *pdev; struct via_channel *chan; struct pci_driver *drvr; int nonblock = (file->f_flags & O_NONBLOCK); DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode); if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) { DPRINTK ("EXIT, returning -EINVAL\n"); return -EINVAL; } card = NULL; pci_for_each_dev(pdev) { drvr = pci_dev_driver (pdev); if (drvr == &via_driver) { assert (pci_get_drvdata (pdev) != NULL); card = pci_get_drvdata (pdev); DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n", card->dev_dsp, minor, (card->dev_dsp ^ minor) & ~0xf); if (((card->dev_dsp ^ minor) & ~0xf) == 0) goto match; } } DPRINTK ("no matching %s found\n", card ? "minor" : "driver"); return -ENODEV; match: if (nonblock) { if (down_trylock (&card->open_sem)) { DPRINTK ("EXIT, returning -EAGAIN\n"); return -EAGAIN; } } else { if (down_interruptible (&card->open_sem)) { DPRINTK ("EXIT, returning -ERESTARTSYS\n"); return -ERESTARTSYS; } } file->private_data = card; DPRINTK ("file->f_mode == 0x%x\n", file->f_mode); /* handle input from analog source */ if (file->f_mode & FMODE_READ) { chan = &card->ch_in; via_chan_init (card, chan); /* why is this forced to 16-bit stereo in all drivers? */ chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO; via_chan_pcm_fmt (chan, 0); via_set_rate (&card->ac97, chan, 44100); } /* handle output to analog source */ if (file->f_mode & FMODE_WRITE) { chan = &card->ch_out; via_chan_init (card, chan); if (file->f_mode & FMODE_READ) { /* if in duplex mode make the recording and playback channels have the same settings */ chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO; via_chan_pcm_fmt (chan, 0); via_set_rate (&card->ac97, chan, 44100); } else { if ((minor & 0xf) == SND_DEV_DSP16) { chan->pcm_fmt = VIA_PCM_FMT_16BIT; via_chan_pcm_fmt (chan, 0); via_set_rate (&card->ac97, chan, 44100); } else { via_chan_pcm_fmt (chan, 0); via_set_rate (&card->ac97, chan, 8000); } } } DPRINTK ("EXIT, returning 0\n"); return 0; } static int via_dsp_release(struct inode *inode, struct file *file) { struct via_info *card; int nonblock = (file->f_flags & O_NONBLOCK); int rc; DPRINTK ("ENTER\n"); assert (file != NULL); card = file->private_data; assert (card != NULL); rc = via_syscall_down (card, nonblock); if (rc) { DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc); return rc; } if (file->f_mode & FMODE_WRITE) { rc = via_dsp_drain_playback (card, &card->ch_out, nonblock); if (rc) printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc); via_chan_free (card, &card->ch_out); via_chan_buffer_free(card, &card->ch_out); } if (file->f_mode & FMODE_READ) { via_chan_free (card, &card->ch_in); via_chan_buffer_free (card, &card->ch_in); } up (&card->syscall_sem); up (&card->open_sem); DPRINTK ("EXIT, returning 0\n"); return 0; } /**************************************************************** * * Chip setup and kernel registration * * */ static int __init via_init_one (struct pci_dev *pdev, const struct pci_device_id *id) { int rc; struct via_info *card; u8 tmp; static int printed_version = 0; DPRINTK ("ENTER\n"); if (printed_version++ == 0) printk (KERN_INFO "Via 686a audio driver " VIA_VERSION "\n"); if (!request_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0), VIA_MODULE_NAME)) { printk (KERN_ERR PFX "unable to obtain I/O resources, aborting\n"); rc = -EBUSY; goto err_out; } if (pci_enable_device (pdev)) { rc = -EIO; goto err_out_none; } card = kmalloc (sizeof (*card), GFP_KERNEL); if (!card) { printk (KERN_ERR PFX "out of memory, aborting\n"); rc = -ENOMEM; goto err_out_none; } pci_set_drvdata (pdev, card); memset (card, 0, sizeof (*card)); card->pdev = pdev; card->baseaddr = pci_resource_start (pdev, 0); card->card_num = via_num_cards++; spin_lock_init (&card->lock); init_MUTEX (&card->syscall_sem); init_MUTEX (&card->open_sem); /* we must init these now, in case the intr handler needs them */ via_chan_init_defaults (card, &card->ch_out); via_chan_init_defaults (card, &card->ch_in); via_chan_init_defaults (card, &card->ch_fm); /* if BAR 2 is present, chip is Rev H or later, * which means it has a few extra features */ if (pci_resource_start (pdev, 2) > 0) card->rev_h = 1; if (pdev->irq < 1) { printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq); rc = -ENODEV; goto err_out_kfree; } if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) { printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n"); rc = -ENODEV; goto err_out_kfree; } /* * init AC97 mixer and codec */ rc = via_ac97_init (card); if (rc) { printk (KERN_ERR PFX "AC97 init failed, aborting\n"); goto err_out_kfree; } /* * init DSP device */ rc = via_dsp_init (card); if (rc) { printk (KERN_ERR PFX "DSP device init failed, aborting\n"); goto err_out_have_mixer; } /* * per-card /proc info */ rc = via_card_init_proc (card); if (rc) { printk (KERN_ERR PFX "card-specific /proc init failed, aborting\n"); goto err_out_have_dsp; } /* * init and turn on interrupts, as the last thing we do */ rc = via_interrupt_init (card); if (rc) { printk (KERN_ERR PFX "interrupt init failed, aborting\n"); goto err_out_have_proc; } pci_read_config_byte (pdev, 0x3C, &tmp); if ((tmp & 0x0F) != pdev->irq) { printk (KERN_WARNING PFX "IRQ fixup, 0x3C==0x%02X\n", tmp); udelay (15); tmp &= 0xF0; tmp |= pdev->irq; pci_write_config_byte (pdev, 0x3C, tmp); DPRINTK ("new 0x3c==0x%02x\n", tmp); } else { DPRINTK ("IRQ reg 0x3c==0x%02x, irq==%d\n", tmp, tmp & 0x0F); } printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n", card->card_num + 1, card->baseaddr, pdev->irq); DPRINTK ("EXIT, returning 0\n"); return 0; err_out_have_proc: via_card_cleanup_proc (card); err_out_have_dsp: via_dsp_cleanup (card); err_out_have_mixer: via_ac97_cleanup (card); err_out_kfree: #ifndef VIA_NDEBUG memset (card, 0xAB, sizeof (*card)); /* poison memory */ #endif kfree (card); err_out_none: release_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0)); err_out: pci_set_drvdata (pdev, NULL); DPRINTK ("EXIT - returning %d\n", rc); return rc; } static void __exit via_remove_one (struct pci_dev *pdev) { struct via_info *card; DPRINTK ("ENTER\n"); assert (pdev != NULL); card = pci_get_drvdata (pdev); assert (card != NULL); via_interrupt_cleanup (card); via_card_cleanup_proc (card); via_dsp_cleanup (card); via_ac97_cleanup (card); release_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0)); #ifndef VIA_NDEBUG memset (card, 0xAB, sizeof (*card)); /* poison memory */ #endif kfree (card); pci_set_drvdata (pdev, NULL); pci_set_power_state (pdev, 3); /* ...zzzzzz */ DPRINTK ("EXIT\n"); return; } /**************************************************************** * * Driver initialization and cleanup * * */ static int __init init_via82cxxx_audio(void) { int rc; DPRINTK ("ENTER\n"); rc = via_init_proc (); if (rc) { DPRINTK ("EXIT, returning %d\n", rc); return rc; } rc = pci_register_driver (&via_driver); if (rc < 1) { if (rc == 0) pci_unregister_driver (&via_driver); via_cleanup_proc (); DPRINTK ("EXIT, returning -ENODEV\n"); return -ENODEV; } DPRINTK ("EXIT, returning 0\n"); return 0; } static void __exit cleanup_via82cxxx_audio(void) { DPRINTK ("ENTER\n"); pci_unregister_driver (&via_driver); via_cleanup_proc (); DPRINTK ("EXIT\n"); } module_init(init_via82cxxx_audio); module_exit(cleanup_via82cxxx_audio); MODULE_AUTHOR("Jeff Garzik "); MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices"); EXPORT_NO_SYMBOLS; #ifdef VIA_PROC_FS /**************************************************************** * * /proc/driver/via/info * * */ static int via_info_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) { #define YN(val,bit) (((val) & (bit)) ? "yes" : "no") #define ED(val,bit) (((val) & (bit)) ? "enable" : "disable") int len = 0; u8 r40, r41, r42, r44; struct via_info *card = data; DPRINTK ("ENTER\n"); assert (card != NULL); len += sprintf (page+len, VIA_CARD_NAME "\n\n"); pci_read_config_byte (card->pdev, 0x40, &r40); pci_read_config_byte (card->pdev, 0x41, &r41); pci_read_config_byte (card->pdev, 0x42, &r42); pci_read_config_byte (card->pdev, 0x44, &r44); len += sprintf (page+len, "Via 82Cxxx PCI registers:\n" "\n" "40 Codec Ready: %s\n" " Codec Low-power: %s\n" " Secondary Codec Ready: %s\n" "\n" "41 Interface Enable: %s\n" " De-Assert Reset: %s\n" " Force SYNC high: %s\n" " Force SDO high: %s\n" " Variable Sample Rate On-Demand Mode: %s\n" " SGD Read Channel PCM Data Out: %s\n" " FM Channel PCM Data Out: %s\n" " SB PCM Data Out: %s\n" "\n" "42 Game port enabled: %s\n" " SoundBlaster enabled: %s\n" " FM enabled: %s\n" " MIDI enabled: %s\n" "\n" "44 AC-Link Interface Access: %s\n" " Secondary Codec Support: %s\n" "\n", YN (r40, VIA_CR40_AC97_READY), YN (r40, VIA_CR40_AC97_LOW_POWER), YN (r40, VIA_CR40_SECONDARY_READY), ED (r41, VIA_CR41_AC97_ENABLE), YN (r41, (1 << 6)), YN (r41, (1 << 5)), YN (r41, (1 << 4)), ED (r41, (1 << 3)), ED (r41, (1 << 2)), ED (r41, (1 << 1)), ED (r41, (1 << 0)), YN (r42, VIA_CR42_GAME_ENABLE), YN (r42, VIA_CR42_SB_ENABLE), YN (r42, VIA_CR42_FM_ENABLE), YN (r42, VIA_CR42_MIDI_ENABLE), YN (r44, VIA_CR44_AC_LINK_ACCESS), YN (r44, VIA_CR44_SECOND_CODEC_SUPPORT) ); DPRINTK ("EXIT, returning %d\n", len); return len; #undef YN #undef ED } /**************************************************************** * * /proc/driver/via/... setup and cleanup * * */ static int __init via_init_proc (void) { DPRINTK ("ENTER\n"); if (!proc_mkdir ("driver/via", 0)) return -EIO; DPRINTK ("EXIT, returning 0\n"); return 0; } static void via_cleanup_proc (void) { DPRINTK ("ENTER\n"); remove_proc_entry ("driver/via", NULL); DPRINTK ("EXIT\n"); } static int __init via_card_init_proc (struct via_info *card) { char s[32]; int rc; DPRINTK ("ENTER\n"); sprintf (s, "driver/via/%d", card->card_num); if (!proc_mkdir (s, 0)) { rc = -EIO; goto err_out_none; } sprintf (s, "driver/via/%d/info", card->card_num); if (!create_proc_read_entry (s, 0, 0, via_info_read_proc, card)) { rc = -EIO; goto err_out_dir; } sprintf (s, "driver/via/%d/ac97", card->card_num); if (!create_proc_read_entry (s, 0, 0, ac97_read_proc, &card->ac97)) { rc = -EIO; goto err_out_info; } DPRINTK ("EXIT, returning 0\n"); return 0; err_out_info: sprintf (s, "driver/via/%d/info", card->card_num); remove_proc_entry (s, NULL); err_out_dir: sprintf (s, "driver/via/%d", card->card_num); remove_proc_entry (s, NULL); err_out_none: DPRINTK ("EXIT, returning %d\n", rc); return rc; } static void via_card_cleanup_proc (struct via_info *card) { char s[32]; DPRINTK ("ENTER\n"); sprintf (s, "driver/via/%d/ac97", card->card_num); remove_proc_entry (s, NULL); sprintf (s, "driver/via/%d/info", card->card_num); remove_proc_entry (s, NULL); sprintf (s, "driver/via/%d", card->card_num); remove_proc_entry (s, NULL); DPRINTK ("EXIT\n"); } #endif /* VIA_PROC_FS */