nm256.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- #ifndef _NM256_H_
- #define _NM256_H_
- #include "ac97.h"
- /* The revisions that we currently handle. */
- enum nm256rev {
- REV_NM256AV, REV_NM256ZX
- };
- /* Per-card structure. */
- struct nm256_info
- {
- /* Magic number used to verify that this struct is valid. */
- #define NM_MAGIC_SIG 0x55aa00ff
- int magsig;
- /* Revision number */
- enum nm256rev rev;
- struct ac97_hwint mdev;
- /* Our audio device numbers. */
- int dev[2];
- /* The # of times each device has been opened. (Should only be
- 0 or 1). */
- int opencnt[2];
- /* We use two devices, because we can do simultaneous play and record.
- This keeps track of which device is being used for what purpose;
- these are the actual device numbers. */
- int dev_for_play;
- int dev_for_record;
- /* The mixer device. */
- int mixer_oss_dev;
- /*
- * Can only be opened once for each operation. These aren't set
- * until an actual I/O operation is performed; this allows one
- * device to be open for read/write without inhibiting I/O to
- * the other device.
- */
- int is_open_play;
- int is_open_record;
- /* Non-zero if we're currently playing a sample. */
- int playing;
- /* Ditto for recording a sample. */
- int recording;
- /* The two memory ports. */
- struct nm256_ports {
- /* Physical address of the port. */
- u32 physaddr;
- /* Our mapped-in pointer. */
- char *ptr;
- /* PTR's offset within the physical port. */
- u32 start_offset;
- /* And the offset of the end of the buffer. */
- u32 end_offset;
- } port[2];
- /* The following are offsets within memory port 1. */
- u32 coeffBuf;
- u32 allCoeffBuf;
- /* Record and playback buffers. */
- u32 abuf1, abuf2;
- /* Offset of the AC97 mixer in memory port 2. */
- u32 mixer;
- /* Offset of the mixer status register in memory port 2. */
- u32 mixer_status_offset;
- /* Non-zero if we have written initial values to the mixer. */
- u8 mixer_values_init;
- /*
- * Status mask bit; (*mixer_status_loc & mixer_status_mask) == 0 means
- * it's ready.
- */
- u16 mixer_status_mask;
- /* The sizes of the playback and record ring buffers. */
- u32 playbackBufferSize;
- u32 recordBufferSize;
- /* Are the coefficient values in the memory cache current? */
- u8 coeffsCurrent;
- /* For writes, the amount we last wrote. */
- u32 requested_amt;
- /* The start of the block currently playing. */
- u32 curPlayPos;
- /* The amount of data we were requested to record. */
- u32 requestedRecAmt;
- /* The offset of the currently-recording block. */
- u32 curRecPos;
- /* The destination buffer. */
- char *recBuf;
- /* Our IRQ number. */
- int irq;
- /* A flag indicating how many times we've grabbed the IRQ. */
- int has_irq;
- /* The card interrupt service routine. */
- void (*introutine) (int, void *, struct pt_regs *);
- /* Current audio config, cached. */
- struct sinfo {
- u32 samplerate;
- u8 bits;
- u8 stereo;
- } sinfo[2]; /* goes with each device */
- /* The cards are stored in a chain; this is the next card. */
- struct nm256_info *next_card;
- };
- /* Debug flag--bigger numbers mean more output. */
- extern int nm256_debug;
- /* The BIOS signature. */
- #define NM_SIGNATURE 0x4e4d0000
- /* Signature mask. */
- #define NM_SIG_MASK 0xffff0000
- /* Size of the second memory area. */
- #define NM_PORT2_SIZE 4096
- /* The base offset of the mixer in the second memory area. */
- #define NM_MIXER_OFFSET 0x600
- /* The maximum size of a coefficient entry. */
- #define NM_MAX_COEFFICIENT 0x5000
- /* The interrupt register. */
- #define NM_INT_REG 0xa04
- /* And its bits. */
- #define NM_PLAYBACK_INT 0x40
- #define NM_RECORD_INT 0x100
- #define NM_MISC_INT_1 0x4000
- #define NM_MISC_INT_2 0x1
- #define NM_ACK_INT(CARD, X) nm256_writePort16((CARD), 2, NM_INT_REG, (X) << 1)
- /* The AV's "mixer ready" status bit and location. */
- #define NM_MIXER_STATUS_OFFSET 0xa04
- #define NM_MIXER_READY_MASK 0x0800
- #define NM_MIXER_PRESENCE 0xa06
- #define NM_PRESENCE_MASK 0x0050
- #define NM_PRESENCE_VALUE 0x0040
- /*
- * For the ZX. It uses the same interrupt register, but it holds 32
- * bits instead of 16.
- */
- #define NM2_PLAYBACK_INT 0x10000
- #define NM2_RECORD_INT 0x80000
- #define NM2_MISC_INT_1 0x8
- #define NM2_MISC_INT_2 0x2
- #define NM2_ACK_INT(CARD, X) nm256_writePort32((CARD), 2, NM_INT_REG, (X))
- /* The ZX's "mixer ready" status bit and location. */
- #define NM2_MIXER_STATUS_OFFSET 0xa06
- #define NM2_MIXER_READY_MASK 0x0800
- /* The playback registers start from here. */
- #define NM_PLAYBACK_REG_OFFSET 0x0
- /* The record registers start from here. */
- #define NM_RECORD_REG_OFFSET 0x200
- /* The rate register is located 2 bytes from the start of the register area. */
- #define NM_RATE_REG_OFFSET 2
- /* Mono/stereo flag, number of bits on playback, and rate mask. */
- #define NM_RATE_STEREO 1
- #define NM_RATE_BITS_16 2
- #define NM_RATE_MASK 0xf0
- /* Playback enable register. */
- #define NM_PLAYBACK_ENABLE_REG (NM_PLAYBACK_REG_OFFSET + 0x1)
- #define NM_PLAYBACK_ENABLE_FLAG 1
- #define NM_PLAYBACK_ONESHOT 2
- #define NM_PLAYBACK_FREERUN 4
- /* Mutes the audio output. */
- #define NM_AUDIO_MUTE_REG (NM_PLAYBACK_REG_OFFSET + 0x18)
- #define NM_AUDIO_MUTE_LEFT 0x8000
- #define NM_AUDIO_MUTE_RIGHT 0x0080
- /* Recording enable register. */
- #define NM_RECORD_ENABLE_REG (NM_RECORD_REG_OFFSET + 0)
- #define NM_RECORD_ENABLE_FLAG 1
- #define NM_RECORD_FREERUN 2
- #define NM_RBUFFER_START (NM_RECORD_REG_OFFSET + 0x4)
- #define NM_RBUFFER_END (NM_RECORD_REG_OFFSET + 0x10)
- #define NM_RBUFFER_WMARK (NM_RECORD_REG_OFFSET + 0xc)
- #define NM_RBUFFER_CURRP (NM_RECORD_REG_OFFSET + 0x8)
- #define NM_PBUFFER_START (NM_PLAYBACK_REG_OFFSET + 0x4)
- #define NM_PBUFFER_END (NM_PLAYBACK_REG_OFFSET + 0x14)
- #define NM_PBUFFER_WMARK (NM_PLAYBACK_REG_OFFSET + 0xc)
- #define NM_PBUFFER_CURRP (NM_PLAYBACK_REG_OFFSET + 0x8)
- /* A few trivial routines to make it easier to work with the registers
- on the chip. */
- /* This is a common code portion used to fix up the port offsets. */
- #define NM_FIX_PORT
- if (port < 1 || port > 2 || card == NULL)
- return -1;
- if (offset < card->port[port - 1].start_offset
- || offset >= card->port[port - 1].end_offset) {
- printk (KERN_ERR "Bad access: port %d, offset 0x%xn", port, offset);
- return -1;
- }
- offset -= card->port[port - 1].start_offset;
- #define DEFwritePortX(X, func)
- static inline int nm256_writePort##X (struct nm256_info *card,
- int port, int offset, int value)
- {
- u##X *addr;
- if (nm256_debug > 1)
- printk (KERN_DEBUG "Writing 0x%x to %d:0x%xn", value, port, offset);
- NM_FIX_PORT;
- addr = (u##X *)(card->port[port - 1].ptr + offset);
- func (value, addr);
- return 0;
- }
- DEFwritePortX (8, writeb)
- DEFwritePortX (16, writew)
- DEFwritePortX (32, writel)
- #define DEFreadPortX(X, func)
- static inline u##X nm256_readPort##X (struct nm256_info *card,
- int port, int offset)
- {
- u##X *addr;
- NM_FIX_PORT
- addr = (u##X *)(card->port[port - 1].ptr + offset);
- return func(addr);
- }
- DEFreadPortX (8, readb)
- DEFreadPortX (16, readw)
- DEFreadPortX (32, readl)
- static inline int
- nm256_writeBuffer8 (struct nm256_info *card, u8 *src, int port, int offset,
- int amt)
- {
- NM_FIX_PORT;
- memcpy_toio (card->port[port - 1].ptr + offset, src, amt);
- return 0;
- }
- static inline int
- nm256_readBuffer8 (struct nm256_info *card, u8 *dst, int port, int offset,
- int amt)
- {
- NM_FIX_PORT;
- memcpy_fromio (dst, card->port[port - 1].ptr + offset, amt);
- return 0;
- }
- /* Returns a non-zero value if we should use the coefficient cache. */
- extern int nm256_cachedCoefficients (struct nm256_info *card);
- #endif
- /*
- * Local variables:
- * c-basic-offset: 4
- * End:
- */