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#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%x\n", 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%x\n", 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:
*/
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