diff options
Diffstat (limited to 'sound/oss/via82cxxx_audio.c')
| -rw-r--r-- | sound/oss/via82cxxx_audio.c | 3616 |
1 files changed, 0 insertions, 3616 deletions
diff --git a/sound/oss/via82cxxx_audio.c b/sound/oss/via82cxxx_audio.c deleted file mode 100644 index f95aa09..0000000 --- a/sound/oss/via82cxxx_audio.c +++ /dev/null @@ -1,3616 +0,0 @@ -/* - * Support for VIA 82Cxxx Audio Codecs - * Copyright 1999,2000 Jeff Garzik - * - * Updated to support the VIA 8233/8235 audio subsystem - * Alan Cox <alan@redhat.com> (C) Copyright 2002, 2003 Red Hat Inc - * - * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2. - * See the "COPYING" file distributed with this software for more info. - * NO WARRANTY - * - * For a list of known bugs (errata) and documentation, - * see via-audio.pdf in Documentation/DocBook. - * If this documentation does not exist, run "make pdfdocs". - */ - - -#define VIA_VERSION "1.9.1-ac4-2.5" - - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/fs.h> -#include <linux/mm.h> -#include <linux/pci.h> -#include <linux/poison.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/proc_fs.h> -#include <linux/spinlock.h> -#include <linux/sound.h> -#include <linux/poll.h> -#include <linux/soundcard.h> -#include <linux/ac97_codec.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/dma-mapping.h> -#include <asm/io.h> -#include <asm/uaccess.h> -#include <linux/mutex.h> - -#include "sound_config.h" -#include "dev_table.h" -#include "mpu401.h" - - -#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 - -#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 - -/* the hardware has a 256 fragment limit */ -#define VIA_MIN_FRAG_NUMBER 2 -#define VIA_MAX_FRAG_NUMBER 128 - -#define VIA_MAX_FRAG_SIZE PAGE_SIZE -#define VIA_MIN_FRAG_SIZE (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER) - - -/* 82C686 function 5 (audio codec) PCI configuration registers */ -#define VIA_ACLINK_STATUS 0x40 -#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_LEFTVOL 0x02 -#define VIA_PCM_RIGHTVOL 0x03 -#define VIA_PCM_TABLE_ADDR 0x04 -#define VIA_PCM_STOPRATE 0x08 /* 8233+ */ -#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 - -/* Six channel audio output on 8233 */ -#define VIA_BASE0_MULTI_OUT_CHAN 0x40 -#define VIA_BASE0_MULTI_OUT_CHAN_STATUS 0x40 -#define VIA_BASE0_MULTI_OUT_CHAN_CTRL 0x41 -#define VIA_BASE0_MULTI_OUT_CHAN_TYPE 0x42 - -#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) - -/* Newer VIA we need to monitor the low 3 bits of each channel. This - mask covers the channels we don't yet use as well - */ - -#define VIA_NEW_INTR_MASK 0x77077777UL - -/* 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_CR42_MIDI_IRQMASK 0x40 -#define VIA_CR42_MIDI_PNP 0x80 - -#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_PAUSED (1 << 6) -#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; - unsigned is_multi: 1; /* 8233 6 channel */ - u8 pcm_fmt; /* VIA_PCM_FMT_xxx */ - u8 channels; /* Channel count */ - - unsigned rate; /* sample rate */ - unsigned int frag_size; - unsigned int frag_number; - - unsigned char intmask; - - 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 ac97_lock; - 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; - unsigned legacy: 1; /* Has legacy ports */ - unsigned intmask: 1; /* Needs int bits */ - unsigned sixchannel: 1; /* 8233/35 with 6 channel support */ - unsigned volume: 1; - - unsigned locked_rate : 1; - - int mixer_vol; /* 8233/35 volume - not yet implemented */ - - struct mutex syscall_mutex; - struct mutex open_mutex; - - /* The 8233/8235 have 4 DX audio channels, two record and - one six channel out. We bind ch_in to DX 1, ch_out to multichannel - and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the - moment */ - - struct via_channel ch_in; - struct via_channel ch_out; - struct via_channel ch_fm; - -#ifdef CONFIG_MIDI_VIA82CXXX - void *midi_devc; - struct address_info midi_info; -#endif -}; - - -/* number of cards, used for assigning unique numbers to cards */ -static unsigned via_num_cards; - - - -/**************************************************************** - * - * prototypes - * - * - */ - -static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id); -static void __devexit via_remove_one (struct pci_dev *pdev); - -static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos); -static ssize_t via_dsp_write(struct file *file, const char __user *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); - - -/**************************************************************** - * - * Various data the driver needs - * - * - */ - - -static struct pci_device_id via_pci_tbl[] = { - { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, - { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, - { 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 = __devexit_p(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 (long 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 (long 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) -{ - DPRINTK("Start with intmask %d\n", chan->intmask); - DPRINTK("About to start from %d to %d\n", - inl(chan->iobase + VIA_PCM_BLOCK_COUNT), - inb(chan->iobase + VIA_PCM_STOPRATE + 3)); - outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL); - DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS)); - DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL)); -} - - -static int sg_active (long iobase) -{ - u8 tmp = inb (iobase + VIA_PCM_STATUS); - if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) { - printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n"); - return 0; - } - if (tmp & VIA_SGD_ACTIVE) - return 1; - return 0; -} - -static int via_sg_offset(struct via_channel *chan) -{ - return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF; -} - -/**************************************************************** - * - * 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) -{ - /* Thomas Sailer: - * EAGAIN is supposed to be used if IO is pending, - * not if there is contention on some internal - * synchronization primitive which should be - * held only for a short time anyway - */ - nonblock = 0; - - if (nonblock) { - if (!mutex_trylock(&card->syscall_mutex)) - return -EAGAIN; - } else { - if (mutex_lock_interruptible(&card->syscall_mutex)) - 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) -{ - u8 tmp, new_tmp; - - 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); - if(card->sixchannel) - via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_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); - if(card->sixchannel) - via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN); - - /* - * clear any enabled interrupt bits - */ - tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE); - new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL); - if (tmp != new_tmp) - outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE); - - tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE); - new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL); - if (tmp != new_tmp) - outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE); - - tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE); - new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL); - if (tmp != new_tmp) - outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE); - - if(card->sixchannel) - { - tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE); - new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL); - if (tmp != new_tmp) - outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE); - } - - udelay(10); - - /* - * clear any existing flags - */ - 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); - - 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; - u32 dacp; - u32 mast_vol, phone_vol, mono_vol, pcm_vol; - u32 mute_vol = 0x8000; /* The mute volume? -- Seems to work! */ - - DPRINTK ("ENTER, rate = %d\n", rate); - - if (chan->rate == rate) - goto out; - 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; - - /* Save current state */ - dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL); - mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO); - mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO); - phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL); - pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL); - /* Mute - largely reduces popping */ - via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol); - via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol); - via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol); - via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol); - /* Power down the DAC */ - via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200); - - /* Set new rate */ - via_ac97_write_reg (ac97, rate_reg, rate); - - /* Power DAC back up */ - via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp); - udelay (200); /* reduces popping */ - - /* Restore volumes */ - via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol); - via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol); - via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol); - via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol); - - /* 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(card->intmask) - chan->intmask = 0x23; /* Turn on the IRQ bits */ - - if (chan == &card->ch_out) { - chan->name = "PCM-OUT"; - if(card->sixchannel) - { - chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN; - chan->is_multi = 1; - DPRINTK("Using multichannel for pcm out\n"); - } - else - 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 of - * 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"); - - - chan->intmask = 0; - if(card->intmask) - chan->intmask = 0x23; /* Turn on the IRQ bits */ - - 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", - chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR); - - via_ac97_wait_idle (card); - outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR); - udelay (20); - via_ac97_wait_idle (card); - /* load no rate adaption, stereo 16bit, set up ring slots */ - if(card->sixchannel) - { - if(!chan->is_multi) - { - outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE); - 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"); - - spin_lock_irq (&card->lock); - - /* stop any existing channel output */ - via_chan_status_clear (chan->iobase); - via_chan_stop (chan->iobase); - via_chan_status_clear (chan->iobase); - - spin_unlock_irq (&card->lock); - - synchronize_irq(card->pdev->irq); - - 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; - chan->channels = 1; - } - - /* 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 in & out channels) */ - if (!chan->is_record) - chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT; - - DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi); - - if(chan->intmask) - { - u32 m; - - /* - * Channel 0x4 is up to 6 x 16bit and has to be - * programmed differently - */ - - if(chan->is_multi) - { - u8 c = 0; - - /* - * Load the type bit for num channels - * and 8/16bit - */ - - if(chan->pcm_fmt & VIA_PCM_FMT_16BIT) - c = 1 << 7; - if(chan->pcm_fmt & VIA_PCM_FMT_STEREO) - c |= (2<<4); - else - c |= (1<<4); - - outb(c, chan->iobase + VIA_PCM_TYPE); - - /* - * Set the channel steering - * Mono - * Channel 0 to slot 3 - * Channel 0 to slot 4 - * Stereo - * Channel 0 to slot 3 - * Channel 1 to slot 4 - */ - - switch(chan->channels) - { - case 1: - outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE); - break; - case 2: - outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE); - break; - case 4: - outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE); - break; - case 6: - outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE); - break; - } - } - else - { - /* - * New style, turn off channel volume - * control, set bits in the right register - */ - outb(0x0, chan->iobase + VIA_PCM_LEFTVOL); - outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL); - - m = inl(chan->iobase + VIA_PCM_STOPRATE); - m &= ~(3<<20); - if(chan->pcm_fmt & VIA_PCM_FMT_STEREO) - m |= (1 << 20); - if(chan->pcm_fmt & VIA_PCM_FMT_16BIT) - m |= (1 << 21); - outl(m, chan->iobase + VIA_PCM_STOPRATE); - } - } - else - 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 - * @card: the chip to accessed - * @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; - chan->channels = 1; - via_chan_pcm_fmt (chan, 0); - break; - - /* stereo */ - case 2: - chan->pcm_fmt |= VIA_PCM_FMT_STEREO; - chan->channels = 2; - via_chan_pcm_fmt (chan, 0); - break; - - case 4: - case 6: - if(chan->is_multi) - { - chan->pcm_fmt |= VIA_PCM_FMT_STEREO; - chan->channels = val; - break; - } - /* unknown */ - default: - 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->channels - * ((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 > VIA_MAX_FRAG_NUMBER) - chan->frag_number = VIA_MAX_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 flushed - * - * 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) -{ - assert (chan->is_active == sg_active(chan->iobase)); - - DPRINTK ("MAYBE START %s\n", chan->name); - 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; - - spin_lock(&card->ac97_lock); - - /* Every time we write to register 80 we cause a transaction. - The only safe way to clear the valid bit is to write it at - the same time as the command */ - data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID; - - outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL); - udelay (20); - - for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) { - udelay (1); - if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) & - (VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID)) - goto out; - } - - printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data); - goto err_out; - -out: - /* Once the valid bit has become set, we must wait a complete AC97 - frame before the data has settled. */ - udelay(25); - data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL); - - outb (0x02, card->baseaddr + 0x83); - - if (((data & 0x007F0000) >> 16) == reg) { - DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n", - data, data & 0x0000FFFF); - spin_unlock(&card->ac97_lock); - return data & 0x0000FFFF; - } - - printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n", - reg, ((data & 0x007F0000) >> 16)); - -err_out: - spin_unlock(&card->ac97_lock); - 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; - - spin_lock(&card->ac97_lock); - - 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: - spin_unlock(&card->ac97_lock); - DPRINTK ("EXIT\n"); -} - - -static int via_mixer_open (struct inode *inode, struct file *file) -{ - int minor = iminor(inode); - struct via_info *card; - struct pci_dev *pdev = NULL; - struct pci_driver *drvr; - - DPRINTK ("ENTER\n"); - - while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) { - 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: - pci_dev_put(pdev); - file->private_data = card->ac97; - - DPRINTK ("EXIT, returning 0\n"); - return nonseekable_open(inode, file); -} - -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; - -#if 0 - /* - * Intercept volume control on 8233 and 8235 - */ - if(card->volume) - { - switch(cmd) - { - case SOUND_MIXER_READ_VOLUME: - return card->mixer_vol; - case SOUND_MIXER_WRITE_VOLUME: - { - int v; - if(get_user(v, (int *)arg)) - { - rc = -EFAULT; - goto out; - } - card->mixer_vol = v; - } - } - } -#endif - rc = codec->mixer_ioctl(codec, cmd, arg); - - mutex_unlock(&card->syscall_mutex); - -out: - DPRINTK ("EXIT, returning %d\n", rc); - return rc; -} - - -static const struct file_operations via_mixer_fops = { - .owner = THIS_MODULE, - .open = via_mixer_open, - .llseek = no_llseek, - .ioctl = via_mixer_ioctl, -}; - - -static int __devinit 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, - * pausing after each command for good luck. Only - * do this if the codec is not ready, because it causes - * loud pops and such due to such a hard codec reset. - */ - pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8); - if ((tmp8 & VIA_CR40_AC97_READY) == 0) { - 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); - } - - /* Make sure VRA is enabled, in case we didn't do a - * complete codec reset, above - */ - pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8); - if (((tmp8 & VIA_CR41_VRA) == 0) || - ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) || - ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) || - ((tmp8 & VIA_CR41_AC97_RESET) == 0)) { - 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(card->legacy) - { -#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 */ - 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); - - 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 __devinit via_ac97_init (struct via_info *card) -{ - int rc; - u16 tmp16; - - DPRINTK ("ENTER\n"); - - assert (card != NULL); - - card->ac97 = ac97_alloc_codec(); - if(card->ac97 == NULL) - return -ENOMEM; - - 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"); - ac97_release_codec(card->ac97); - return -EIO; - } - - rc = via_ac97_reset (card); - if (rc) { - printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n"); - goto err_out; - } - - mdelay(10); - - 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 */ - tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS); - via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1); - - /* - * 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; - -err_out: - unregister_sound_mixer (card->ac97->dev_mixer); - DPRINTK ("EXIT, returning %d\n", rc); - ac97_release_codec(card->ac97); - 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); - ac97_release_codec(card->ac97); - - DPRINTK ("EXIT\n"); -} - - - -/**************************************************************** - * - * Interrupt-related code - * - */ - -/** - * via_intr_channel - handle an interrupt for a single channel - * @card: unused - * @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_info *card, 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 = cpu_to_le32(chan->frag_size | VIA_EOL); - atomic_set (&chan->hw_ptr, 0); - } else { - chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG); - atomic_inc (&chan->hw_ptr); - } - - /* accounting crap for SNDCTL_DSP_GETxPTR */ - chan->n_irqs++; - chan->bytes += chan->frag_size; - /* FIXME - signed overflow is undefined */ - if (chan->bytes < 0) /* handle overflow of 31-bit value */ - chan->bytes = chan->frag_size; - /* all following checks only occur when not in mmap(2) mode */ - if (!chan->is_mapped) - { - /* 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); - } - } - /* wake up anyone listening to see when interrupts occur */ - 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)); - - DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name, - atomic_read (&chan->n_frags), missed); -} - - -static irqreturn_t via_interrupt(int irq, void *dev_id) -{ - 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)) - { -#ifdef CONFIG_MIDI_VIA82CXXX - if (card->midi_devc) - uart401intr(irq, card->midi_devc); -#endif - return IRQ_HANDLED; - } - 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, &card->ch_out); - if (status32 & VIA_INTR_IN) - via_intr_channel (card, &card->ch_in); - if (status32 & VIA_INTR_FM) - via_intr_channel (card, &card->ch_fm); - - spin_unlock (&card->lock); - - return IRQ_HANDLED; -} - -static irqreturn_t via_new_interrupt(int irq, void *dev_id) -{ - 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_NEW_INTR_MASK)) - return IRQ_NONE; - /* - * goes away completely on UP - */ - spin_lock (&card->lock); - - via_intr_channel (card, &card->ch_out); - via_intr_channel (card, &card->ch_in); - via_intr_channel (card, &card->ch_fm); - - spin_unlock (&card->lock); - return IRQ_HANDLED; -} - - -/** - * 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) -{ - u8 tmp8; - - 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; - } - - /* VIA requires this is done */ - pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq); - - if(card->legacy) - { - /* make sure FM irq is not routed to us */ - 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); - } - if (request_irq (card->pdev->irq, via_interrupt, IRQF_SHARED, 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; - } - } - else - { - if (request_irq (card->pdev->irq, via_new_interrupt, IRQF_SHARED, 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; - } - } - - DPRINTK ("EXIT, returning 0\n"); - return 0; -} - - -/**************************************************************** - * - * OSS DSP device - * - */ - -static const 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 = no_llseek, - .ioctl = via_dsp_ioctl, - .mmap = via_dsp_mmap, -}; - - -static int __devinit via_dsp_init (struct via_info *card) -{ - u8 tmp8; - - DPRINTK ("ENTER\n"); - - assert (card != NULL); - - if(card->legacy) - { - /* 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_FM_ENABLE)) { - tmp8 &= ~(VIA_CR42_SB_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 *type) -{ - struct via_info *card = vma->vm_private_data; - struct via_channel *chan = &card->ch_out; - unsigned long max_bufs; - struct page *dmapage; - unsigned long pgoff; - int rd, wr; - - DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n", - vma->vm_start, - address - vma->vm_start, - (address - vma->vm_start) >> PAGE_SHIFT, - address); - - if (address > vma->vm_end) { - DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n"); - return NOPAGE_SIGBUS; /* Disallow mremap */ - } - if (!card) { - DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n"); - return NOPAGE_SIGBUS; /* Nothing allocated */ - } - - pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT); - rd = card->ch_in.is_mapped; - wr = card->ch_out.is_mapped; - - max_bufs = chan->frag_number; - if (rd && wr) - max_bufs *= 2; - if (pgoff >= max_bufs) - return NOPAGE_SIGBUS; - - /* 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); - if (type) - *type = VM_FAULT_MINOR; - return dmapage; -} - - -#ifndef VM_RESERVED -static int via_mm_swapout (struct page *page, struct file *filp) -{ - return 0; -} -#endif /* VM_RESERVED */ - - -static 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; - - mutex_unlock(&card->syscall_mutex); - rc = 0; - -out: - DPRINTK ("EXIT, returning %d\n", rc); - return rc; -} - - -static ssize_t via_dsp_do_read (struct via_info *card, - char __user *userbuf, size_t count, - int nonblock) -{ - DECLARE_WAITQUEUE(wait, current); - const char __user *orig_userbuf = userbuf; - struct via_channel *chan = &card->ch_in; - size_t size; - int n, tmp; - ssize_t ret = 0; - - /* if SGD has not yet been started, start it */ - via_chan_maybe_start (chan); - -handle_one_block: - /* just to be a nice neighbor */ - /* Thomas Sailer: - * But also to ourselves, release semaphore if we do so */ - if (need_resched()) { - mutex_unlock(&card->syscall_mutex); - schedule (); - ret = via_syscall_down (card, nonblock); - if (ret) - goto out; - } - - /* 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. - */ - add_wait_queue(&chan->wait, &wait); - for (;;) { - __set_current_state(TASK_INTERRUPTIBLE); - tmp = atomic_read (&chan->n_frags); - assert (tmp >= 0); - assert (tmp <= chan->frag_number); - if (tmp) - break; - if (nonblock || !chan->is_active) { - ret = -EAGAIN; - break; - } - - mutex_unlock(&card->syscall_mutex); - - DPRINTK ("Sleeping on block %d\n", n); - schedule(); - - ret = via_syscall_down (card, nonblock); - if (ret) - break; - - if (signal_pending (current)) { - ret = -ERESTARTSYS; - break; - } - } - set_current_state(TASK_RUNNING); - remove_wait_queue(&chan->wait, &wait); - if (ret) - goto out; - - /* 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; - void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr; - unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size; - - size = (count < slop_left) ? count : slop_left; - if (copy_to_user (userbuf, - base + ofs + chan->slop_len, - size)) { - ret = -EFAULT; - goto out; - } - - 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) ? (userbuf - orig_userbuf) : ret; -} - - -static ssize_t via_dsp_read(struct file *file, char __user *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); - card = file->private_data; - assert (card != NULL); - - 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: - mutex_unlock(&card->syscall_mutex); -out: - DPRINTK ("EXIT, returning %ld\n",(long) rc); - return rc; -} - - -static ssize_t via_dsp_do_write (struct via_info *card, - const char __user *userbuf, size_t count, - int nonblock) -{ - DECLARE_WAITQUEUE(wait, current); - const char __user *orig_userbuf = userbuf; - struct via_channel *chan = &card->ch_out; - volatile struct via_sgd_table *sgtable = chan->sgtable; - size_t size; - int n, tmp; - ssize_t ret = 0; - -handle_one_block: - /* just to be a nice neighbor */ - /* Thomas Sailer: - * But also to ourselves, release semaphore if we do so */ - if (need_resched()) { - mutex_unlock(&card->syscall_mutex); - schedule (); - ret = via_syscall_down (card, nonblock); - if (ret) - goto out; - } - - /* 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. - */ - add_wait_queue(&chan->wait, &wait); - for (;;) { - __set_current_state(TASK_INTERRUPTIBLE); - tmp = atomic_read (&chan->n_frags); - assert (tmp >= 0); - assert (tmp <= chan->frag_number); - if (tmp) - break; - if (nonblock || !chan->is_active) { - ret = -EAGAIN; - break; - } - - mutex_unlock(&card->syscall_mutex); - - DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record); - schedule(); - - ret = via_syscall_down (card, nonblock); - if (ret) - break; - - if (signal_pending (current)) { - ret = -ERESTARTSYS; - break; - } - } - set_current_state(TASK_RUNNING); - remove_wait_queue(&chan->wait, &wait); - if (ret) - goto out; - - /* 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)) { - ret = -EFAULT; - goto out; - } - - 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==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n", - inb (card->baseaddr + 0x00), - inb (card->baseaddr + 0x01), - inb (card->baseaddr + 0x02), - inl (card->baseaddr + 0x04), - inl (card->baseaddr + 0x08), - inl (card->baseaddr + 0x0C), - inl (card->baseaddr + 0x80), - inl (card->baseaddr + 0x84)); - - if (count > 0) - goto handle_one_block; - -out: - if (userbuf - orig_userbuf) - return userbuf - orig_userbuf; - else - return ret; -} - - -static ssize_t via_dsp_write(struct file *file, const char __user *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); - card = file->private_data; - assert (card != NULL); - - 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: - mutex_unlock(&card->syscall_mutex); -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; - struct via_channel *chan; - unsigned int mask = 0; - - DPRINTK ("ENTER\n"); - - assert (file != NULL); - card = file->private_data; - assert (card != NULL); - - if (file->f_mode & FMODE_READ) { - chan = &card->ch_in; - if (sg_active (chan->iobase)) - poll_wait(file, &chan->wait, wait); - if (atomic_read (&chan->n_frags) > 0) - mask |= POLLIN | POLLRDNORM; - } - - if (file->f_mode & FMODE_WRITE) { - chan = &card->ch_out; - if (sg_active (chan->iobase)) - poll_wait(file, &chan->wait, wait); - if (atomic_read (&chan->n_frags) > 0) - mask |= POLLOUT | POLLWRNORM; - } - - 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_mutex - */ - -static int via_dsp_drain_playback (struct via_info *card, - struct via_channel *chan, int nonblock) -{ - DECLARE_WAITQUEUE(wait, current); - int ret = 0; - - 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); - - add_wait_queue(&chan->wait, &wait); - for (;;) { - DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number); - __set_current_state(TASK_INTERRUPTIBLE); - if (atomic_read (&chan->n_frags) >= chan->frag_number) - break; - - if (nonblock) { - DPRINTK ("EXIT, returning -EAGAIN\n"); - ret = -EAGAIN; - break; - } - -#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 - - mutex_unlock(&card->syscall_mutex); - - DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags)); - schedule(); - - if ((ret = via_syscall_down (card, nonblock))) - break; - - if (signal_pending (current)) { - DPRINTK ("EXIT, returning -ERESTARTSYS\n"); - ret = -ERESTARTSYS; - break; - } - } - set_current_state(TASK_RUNNING); - remove_wait_queue(&chan->wait, &wait); - -#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 %d\n", ret); - return ret; -} - - -/** - * 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_mutex - */ - -static int via_dsp_ioctl_space (struct via_info *card, - struct via_channel *chan, - void __user *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))?-EFAULT:0; -} - - -/** - * 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_mutex - */ - -static int via_dsp_ioctl_ptr (struct via_info *card, - struct via_channel *chan, - void __user *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 - via_sg_offset(chan); - 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))?-EFAULT:0; -} - - -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); - int __user *ip = (int __user *)arg; - void __user *p = (void __user *)arg; - - 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, ip); - 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, ip); - break; - - /* query or set current channel's PCM data format */ - case SNDCTL_DSP_SETFMT: - if (get_user(val, ip)) { - 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, ip); - break; - - /* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */ - case SNDCTL_DSP_CHANNELS: - if (get_user(val, ip)) { - 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) - val = card->ch_in.channels; - else - val = card->ch_out.channels; - } - DPRINTK ("CHANNELS EXIT, returning %d\n", val); - rc = put_user (val, ip); - break; - - /* enable (val is not zero) or disable (val == 0) stereo */ - case SNDCTL_DSP_STEREO: - if (get_user(val, ip)) { - 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, ip); - break; - - /* query or set sampling rate */ - case SNDCTL_DSP_SPEED: - if (get_user(val, ip)) { - 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, ip); - break; - - /* wait until all buffers have been played, and then stop device */ - case SNDCTL_DSP_SYNC: - DPRINTK ("DSP_SYNC\n"); - rc = 0; - 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); - 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); - card->ch_out.frag_number = 0; - card->ch_out.frag_size = 0; - atomic_set(&card->ch_out.n_frags, 0); - } - - rc = 0; - break; - - case SNDCTL_DSP_NONBLOCK: - file->f_flags |= O_NONBLOCK; - 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, ip); - 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, ip); - } else if (wr) { - via_chan_set_buffering(card, &card->ch_out, -1); - rc = put_user(card->ch_out.frag_size, ip); - } - 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, p); - 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, p); - 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, p); - 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, p); - 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); - - assert(val >= 0); - - if (val > 0) { - val *= chan->frag_size; - val -= chan->frag_size - via_sg_offset(chan); - } - 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, ip); - 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, ip)) { - 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; - - case SNDCTL_DSP_GETTRIGGER: - val = 0; - if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled) - val |= PCM_ENABLE_INPUT; - if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled) - val |= PCM_ENABLE_OUTPUT; - rc = put_user(val, ip); - 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, ip)) { - 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, p); - break; - } - - mutex_unlock(&card->syscall_mutex); - DPRINTK ("EXIT, returning %d\n", rc); - return rc; -} - - -static int via_dsp_open (struct inode *inode, struct file *file) -{ - int minor = iminor(inode); - struct via_info *card; - struct pci_dev *pdev = NULL; - 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; - while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) { - 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: - pci_dev_put(pdev); - if (nonblock) { - if (!mutex_trylock(&card->open_mutex)) { - DPRINTK ("EXIT, returning -EAGAIN\n"); - return -EAGAIN; - } - } else { - if (mutex_lock_interruptible(&card->open_mutex)) { - 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; - chan->channels = 2; - - // TO DO - use FIFO: via_capture_fifo(card, 1); - 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; - chan->channels = 2; - 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, 1); - via_set_rate (card->ac97, chan, 8000); - } - } - } - - DPRINTK ("EXIT, returning 0\n"); - return nonseekable_open(inode, file); -} - - -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 && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */ - 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); - } - - mutex_unlock(&card->syscall_mutex); - mutex_unlock(&card->open_mutex); - - DPRINTK ("EXIT, returning 0\n"); - return 0; -} - - -/**************************************************************** - * - * Chip setup and kernel registration - * - * - */ - -static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id) -{ -#ifdef CONFIG_MIDI_VIA82CXXX - u8 r42; -#endif - int rc; - struct via_info *card; - static int printed_version; - - DPRINTK ("ENTER\n"); - - if (printed_version++ == 0) - printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n"); - - rc = pci_enable_device (pdev); - if (rc) - goto err_out; - - rc = pci_request_regions (pdev, "via82cxxx_audio"); - if (rc) - goto err_out_disable; - - rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); - if (rc) - goto err_out_res; - rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); - if (rc) - goto err_out_res; - - card = kmalloc (sizeof (*card), GFP_KERNEL); - if (!card) { - printk (KERN_ERR PFX "out of memory, aborting\n"); - rc = -ENOMEM; - goto err_out_res; - } - - 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); - spin_lock_init (&card->ac97_lock); - mutex_init(&card->syscall_mutex); - mutex_init(&card->open_mutex); - - /* 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; - - /* Overkill for now, but more flexible done right */ - - card->intmask = id->driver_data; - card->legacy = !card->intmask; - card->sixchannel = id->driver_data; - - if(card->sixchannel) - printk(KERN_INFO PFX "Six channel audio available\n"); - 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; - } - - pci_set_master(pdev); - - /* - * 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; - } - - /* - * 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_dsp; - } - - printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n", - card->card_num + 1, card->baseaddr, pdev->irq); - -#ifdef CONFIG_MIDI_VIA82CXXX - /* Disable by default */ - card->midi_info.io_base = 0; - - if(card->legacy) - { - pci_read_config_byte (pdev, 0x42, &r42); - /* Disable MIDI interrupt */ - pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK); - if (r42 & VIA_CR42_MIDI_ENABLE) - { - if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */ - card->midi_info.io_base = pci_resource_start (pdev, 2); - else /* Address selected by byte 0x43 */ - { - u8 r43; - pci_read_config_byte (pdev, 0x43, &r43); - card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2); - } - - card->midi_info.irq = -pdev->irq; - if (probe_uart401(& card->midi_info, THIS_MODULE)) - { - card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc; - pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK); - printk("Enabled Via MIDI\n"); - } - } - } -#endif - - DPRINTK ("EXIT, returning 0\n"); - return 0; - -err_out_have_dsp: - via_dsp_cleanup (card); - -err_out_have_mixer: - via_ac97_cleanup (card); - -err_out_kfree: -#ifndef VIA_NDEBUG - memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */ -#endif - kfree (card); - -err_out_res: - pci_release_regions (pdev); - -err_out_disable: - pci_disable_device (pdev); - -err_out: - pci_set_drvdata (pdev, NULL); - DPRINTK ("EXIT - returning %d\n", rc); - return rc; -} - - -static void __devexit 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); - -#ifdef CONFIG_MIDI_VIA82CXXX - if (card->midi_info.io_base) - unload_uart401(&card->midi_info); -#endif - - free_irq (card->pdev->irq, card); - via_dsp_cleanup (card); - via_ac97_cleanup (card); - -#ifndef VIA_NDEBUG - memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */ -#endif - kfree (card); - - pci_set_drvdata (pdev, NULL); - - pci_release_regions (pdev); - pci_disable_device (pdev); - 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 = pci_register_driver (&via_driver); - if (rc) { - DPRINTK ("EXIT, returning %d\n", rc); - return rc; - } - - DPRINTK ("EXIT, returning 0\n"); - return 0; -} - - -static void __exit cleanup_via82cxxx_audio(void) -{ - DPRINTK ("ENTER\n"); - - pci_unregister_driver (&via_driver); - - 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"); -MODULE_LICENSE("GPL"); - |
