patch-2.3.19 linux/drivers/sound/nm256.h

• Lines: 255
• Date: Sat Oct 2 07:49:30 1999
• Orig file: v2.3.18/linux/drivers/sound/nm256.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.18/linux/drivers/sound/nm256.h linux/drivers/sound/nm256.h
@@ -0,0 +1,254 @@
+#ifndef _NM256_H_
+#define _NM256_H_
+
+#include "ac97.h"
+
+enum nm256rev {
+    REV_NM256AV, REV_NM256ZX
+};
+
+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. */
+    char *ports[2];
+
+    /* Starting offset of the port1 area mapped into memory. */
+    u32 port1_start;
+    /* Ending offset. */
+    u32 port1_end;
+    /* The offset of the end of the actual buffer area.  */
+    u32 bufend;
+
+    /* 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;
+
+    /* 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 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;
+
+/* Size of the second memory port. */
+#define NM_PORT2_SIZE 4096
+/* The location of the mixer. */
+#define NM_MIXER_BASE 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)
+
+/* For the second revision.  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 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 (port == 1) { \
+        if (offset < card->port1_start || offset >= card->port1_end) { \
+	    printk (KERN_ERR "Bad port request port 1:0x%x\n", offset); \
+            return -1; \
+        } \
+        offset -= card->port1_start; \
+   } else if (offset < 0 || offset > 4096) { \
+        printk (KERN_ERR "Bad port request port 2: 0x%x\n", offset); \
+        return -1; \
+   }
+
+#define DEFwritePortX(X, func) \
+static inline int nm256_writePort##X (struct nm256_info *card,\
+					int port, int offset, int value)\
+{\
+    u##X *addr;\
+\
+    NM_FIX_PORT;\
+\
+    addr = (u##X *)(card->ports[port - 1] + offset);\
+    func (value, addr);\
+    return 0;\
+}
+
+DEFwritePortX (8, writeb)
+DEFwritePortX (16, writew)
+DEFwritePortX (32, writel)
+
+#define DEFreadPortX(X) \
+static inline u##X nm256_readPort##X (struct nm256_info *card,\
+					int port, int offset)\
+{\
+    u##X *addr, res;\
+\
+    NM_FIX_PORT\
+\
+    addr = (u##X *)(card->ports[port - 1] + offset);\
+    memcpy_fromio (&res, addr, sizeof (res));\
+    return res;\
+}
+
+DEFreadPortX (8)
+DEFreadPortX (16)
+DEFreadPortX (32)
+
+static inline int
+nm256_writeBuffer8 (struct nm256_info *card, u8 *src, int port, int offset,
+		      int amt)
+{
+    NM_FIX_PORT;
+    memcpy_toio (card->ports[port - 1] + 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->ports[port - 1] + 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:
+ */