The idea to encode the bitfield manipulation in the register address is
quite clever, but doing that by hand is ugly and error-prone. So derive
it automatically from the mask instead.
Macros cannot #define other macros, so we now declare enums instead.
This also adds macros for decoding the register definitions. These will
be used by later commits.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen(a)gmx.de>
---
v2: added comments
---
include/sound/emu10k1.h | 123 ++++++++++++++++++++--------------------
1 file changed, 60 insertions(+), 63 deletions(-)
diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 7129b9249eb3..e9b1729ade60 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -38,6 +38,32 @@
#define IP_TO_CP(ip) ((ip == 0) ? 0 : (((0x00001000uL | (ip & 0x00000FFFL)) << (((ip >> 12) & 0x000FL) + 4)) & 0xFFFF0000uL))
+// This is used to define hardware bit-fields (sub-registers) by combining
+// the bit shift and count with the actual register address. The passed
+// mask must represent a single run of adjacent bits.
+// The non-concatenating (_NC) variant should be used directly only for
+// sub-registers that do not follow the <register>_<field> naming pattern.
+#define SUB_REG_NC(reg, field, mask) \
+ enum { \
+ field ## _MASK = mask, \
+ field = reg | \
+ (__builtin_ctz(mask) << 16) | \
+ (__builtin_popcount(mask) << 24), \
+ };
+#define SUB_REG(reg, field, mask) SUB_REG_NC(reg, reg ## _ ## field, mask)
+
+// Macros for manipulating values of bit-fields declared using the above macros.
+// Best used with constant register addresses, as otherwise quite some code is
+// generated. The actual register read/write functions handle combined addresses
+// automatically, so use of these macros conveys no advantage when accessing a
+// single sub-register at a time.
+#define REG_SHIFT(r) (((r) >> 16) & 0x1f)
+#define REG_SIZE(r) (((r) >> 24) & 0x1f)
+#define REG_MASK0(r) ((1U << REG_SIZE(r)) - 1U)
+#define REG_MASK(r) (REG_MASK0(r) << REG_SHIFT(r))
+#define REG_VAL_GET(r, v) ((v & REG_MASK(r)) >> REG_SHIFT(r))
+#define REG_VAL_PUT(r, v) ((v) << REG_SHIFT(r))
+
// Audigy specify registers are prefixed with 'A_'
/************************************************************************************************/
@@ -148,12 +174,10 @@
#define INTE_MIDIRXENABLE 0x00000001 /* Enable MIDI receive-buffer-empty interrupts */
#define WC 0x10 /* Wall Clock register */
-#define WC_SAMPLECOUNTER_MASK 0x03FFFFC0 /* Sample periods elapsed since reset */
-#define WC_SAMPLECOUNTER 0x14060010
-#define WC_CURRENTCHANNEL_MASK 0x0000003F /* Channel [0..63] currently being serviced */
+SUB_REG(WC, SAMPLECOUNTER, 0x03FFFFC0) /* Sample periods elapsed since reset */
+SUB_REG(WC, CURRENTCHANNEL, 0x0000003F) /* Channel [0..63] currently being serviced */
/* NOTE: Each channel takes 1/64th of a sample */
/* period to be serviced. */
-#define WC_CURRENTCHANNEL 0x06000010
#define HCFG 0x14 /* Hardware config register */
/* NOTE: There is no reason to use the legacy */
@@ -225,9 +249,8 @@
/* async audio source */
#define HCFG_LOCKSOUNDCACHE 0x00000008 /* 1 = Cancel bustmaster accesses to soundcache */
/* NOTE: This should generally never be used. */
-#define HCFG_LOCKTANKCACHE_MASK 0x00000004 /* 1 = Cancel bustmaster accesses to tankcache */
+SUB_REG(HCFG, LOCKTANKCACHE, 0x00000004) /* 1 = Cancel bustmaster accesses to tankcache */
/* NOTE: This should generally never be used. */
-#define HCFG_LOCKTANKCACHE 0x01020014
#define HCFG_MUTEBUTTONENABLE 0x00000002 /* 1 = Master mute button sets AUDIOENABLE = 0. */
/* NOTE: This is a 'cheap' way to implement a */
/* master mute function on the mute button, and */
@@ -382,55 +405,38 @@
// which the current registers "swerve" gradually.
#define CPF 0x00 /* Current pitch and fraction register */
-#define CPF_CURRENTPITCH_MASK 0xffff0000 /* Current pitch (linear, 0x4000 == unity pitch shift) */
-#define CPF_CURRENTPITCH 0x10100000
+SUB_REG(CPF, CURRENTPITCH, 0xffff0000) /* Current pitch (linear, 0x4000 == unity pitch shift) */
#define CPF_STEREO_MASK 0x00008000 /* 1 = Even channel interleave, odd channel locked */
#define CPF_STOP_MASK 0x00004000 /* 1 = Current pitch forced to 0 */
#define CPF_FRACADDRESS_MASK 0x00003fff /* Linear fractional address of the current channel */
#define PTRX 0x01 /* Pitch target and send A/B amounts register */
-#define PTRX_PITCHTARGET_MASK 0xffff0000 /* Pitch target of specified channel */
-#define PTRX_PITCHTARGET 0x10100001
-#define PTRX_FXSENDAMOUNT_A_MASK 0x0000ff00 /* Linear level of channel output sent to FX send bus A */
-#define PTRX_FXSENDAMOUNT_A 0x08080001
-#define PTRX_FXSENDAMOUNT_B_MASK 0x000000ff /* Linear level of channel output sent to FX send bus B */
-#define PTRX_FXSENDAMOUNT_B 0x08000001
+SUB_REG(PTRX, PITCHTARGET, 0xffff0000) /* Pitch target of specified channel */
+SUB_REG(PTRX, FXSENDAMOUNT_A, 0x0000ff00) /* Linear level of channel output sent to FX send bus A */
+SUB_REG(PTRX, FXSENDAMOUNT_B, 0x000000ff) /* Linear level of channel output sent to FX send bus B */
#define CVCF 0x02 /* Current volume and filter cutoff register */
-#define CVCF_CURRENTVOL_MASK 0xffff0000 /* Current linear volume of specified channel */
-#define CVCF_CURRENTVOL 0x10100002
-#define CVCF_CURRENTFILTER_MASK 0x0000ffff /* Current filter cutoff frequency of specified channel */
-#define CVCF_CURRENTFILTER 0x10000002
+SUB_REG(CVCF, CURRENTVOL, 0xffff0000) /* Current linear volume of specified channel */
+SUB_REG(CVCF, CURRENTFILTER, 0x0000ffff) /* Current filter cutoff frequency of specified channel */
#define VTFT 0x03 /* Volume target and filter cutoff target register */
-#define VTFT_VOLUMETARGET_MASK 0xffff0000 /* Volume target of specified channel */
-#define VTFT_VOLUMETARGET 0x10100003
-#define VTFT_FILTERTARGET_MASK 0x0000ffff /* Filter cutoff target of specified channel */
-#define VTFT_FILTERTARGET 0x10000003
+SUB_REG(VTFT, VOLUMETARGET, 0xffff0000) /* Volume target of specified channel */
+SUB_REG(VTFT, FILTERTARGET, 0x0000ffff) /* Filter cutoff target of specified channel */
#define Z1 0x05 /* Filter delay memory 1 register */
#define Z2 0x04 /* Filter delay memory 2 register */
#define PSST 0x06 /* Send C amount and loop start address register */
-#define PSST_FXSENDAMOUNT_C_MASK 0xff000000 /* Linear level of channel output sent to FX send bus C */
-
-#define PSST_FXSENDAMOUNT_C 0x08180006
-
-#define PSST_LOOPSTARTADDR_MASK 0x00ffffff /* Loop start address of the specified channel */
-#define PSST_LOOPSTARTADDR 0x18000006
+SUB_REG(PSST, FXSENDAMOUNT_C, 0xff000000) /* Linear level of channel output sent to FX send bus C */
+SUB_REG(PSST, LOOPSTARTADDR, 0x00ffffff) /* Loop start address of the specified channel */
#define DSL 0x07 /* Send D amount and loop end address register */
-#define DSL_FXSENDAMOUNT_D_MASK 0xff000000 /* Linear level of channel output sent to FX send bus D */
-
-#define DSL_FXSENDAMOUNT_D 0x08180007
-
-#define DSL_LOOPENDADDR_MASK 0x00ffffff /* Loop end address of the specified channel */
-#define DSL_LOOPENDADDR 0x18000007
+SUB_REG(DSL, FXSENDAMOUNT_D, 0xff000000) /* Linear level of channel output sent to FX send bus D */
+SUB_REG(DSL, LOOPENDADDR, 0x00ffffff) /* Loop end address of the specified channel */
#define CCCA 0x08 /* Filter Q, interp. ROM, byte size, cur. addr register */
-#define CCCA_RESONANCE_MASK 0xf0000000 /* Lowpass filter resonance (Q) height */
-#define CCCA_RESONANCE 0x041c0008
+SUB_REG(CCCA, RESONANCE, 0xf0000000) /* Lowpass filter resonance (Q) height */
#define CCCA_INTERPROM_MASK 0x0e000000 /* Selects passband of interpolation ROM */
/* 1 == full band, 7 == lowpass */
/* ROM 0 is used when pitch shifting downward or less */
@@ -447,27 +453,24 @@
#define CCCA_INTERPROM_7 0x0e000000 /* Select interpolation ROM 7 */
#define CCCA_8BITSELECT 0x01000000 /* 1 = Sound memory for this channel uses 8-bit samples */
/* 8-bit samples are unsigned, 16-bit ones signed */
-#define CCCA_CURRADDR_MASK 0x00ffffff /* Current address of the selected channel */
-#define CCCA_CURRADDR 0x18000008
+SUB_REG(CCCA, CURRADDR, 0x00ffffff) /* Current address of the selected channel */
#define CCR 0x09 /* Cache control register */
-#define CCR_CACHEINVALIDSIZE 0x07190009
-#define CCR_CACHEINVALIDSIZE_MASK 0xfe000000 /* Number of invalid samples before the read address */
+SUB_REG(CCR, CACHEINVALIDSIZE, 0xfe000000) /* Number of invalid samples before the read address */
#define CCR_CACHELOOPFLAG 0x01000000 /* 1 = Cache has a loop service pending */
#define CCR_INTERLEAVEDSAMPLES 0x00800000 /* 1 = A cache service will fetch interleaved samples */
/* Auto-set from CPF_STEREO_MASK */
#define CCR_WORDSIZEDSAMPLES 0x00400000 /* 1 = A cache service will fetch word sized samples */
/* Auto-set from CCCA_8BITSELECT */
-#define CCR_READADDRESS 0x06100009
-#define CCR_READADDRESS_MASK 0x003f0000 /* Next cached sample to play */
-#define CCR_LOOPINVALSIZE 0x0000fe00 /* Number of invalid samples in cache prior to loop */
+SUB_REG(CCR, READADDRESS, 0x003f0000) /* Next cached sample to play */
+SUB_REG(CCR, LOOPINVALSIZE, 0x0000fe00) /* Number of invalid samples in cache prior to loop */
/* NOTE: This is valid only if CACHELOOPFLAG is set */
#define CCR_LOOPFLAG 0x00000100 /* Set for a single sample period when a loop occurs */
-#define CCR_CACHELOOPADDRHI 0x000000ff /* CLP_LOOPSTARTADDR's hi byte if CACHELOOPFLAG is set */
+SUB_REG(CCR, CACHELOOPADDRHI, 0x000000ff) /* CLP_LOOPSTARTADDR's hi byte if CACHELOOPFLAG is set */
#define CLP 0x0a /* Cache loop register (valid if CCR_CACHELOOPFLAG = 1) */
/* NOTE: This register is normally not used */
-#define CLP_CACHELOOPADDR 0x0000ffff /* Cache loop address low word */
+SUB_REG(CLP, CACHELOOPADDR, 0x0000ffff) /* Cache loop address low word */
#define FXRT 0x0b /* Effects send routing register */
/* NOTE: It is illegal to assign the same routing to */
@@ -537,20 +540,17 @@
#define IP_UNITY 0x0000e000 /* Unity pitch shift */
#define IFATN 0x19 /* Initial filter cutoff and attenuation register */
-#define IFATN_FILTERCUTOFF_MASK 0x0000ff00 /* Initial filter cutoff frequency in exponential units */
+SUB_REG(IFATN, FILTERCUTOFF, 0x0000ff00) /* Initial filter cutoff frequency in exponential units */
/* 6 most significant bits are semitones */
/* 2 least significant bits are fractions */
-#define IFATN_FILTERCUTOFF 0x08080019
-#define IFATN_ATTENUATION_MASK 0x000000ff /* Initial attenuation in 0.375dB steps */
-#define IFATN_ATTENUATION 0x08000019
+SUB_REG(IFATN, ATTENUATION, 0x000000ff) /* Initial attenuation in 0.375dB steps */
#define PEFE 0x1a /* Pitch envelope and filter envelope amount register */
-#define PEFE_PITCHAMOUNT_MASK 0x0000ff00 /* Pitch envlope amount */
+SUB_REG(PEFE, PITCHAMOUNT, 0x0000ff00) /* Pitch envlope amount */
/* Signed 2's complement, +/- one octave peak extremes */
-#define PEFE_PITCHAMOUNT 0x0808001a
-#define PEFE_FILTERAMOUNT_MASK 0x000000ff /* Filter envlope amount */
+SUB_REG(PEFE, FILTERAMOUNT, 0x000000ff) /* Filter envlope amount */
/* Signed 2's complement, +/- six octaves peak extremes */
-#define PEFE_FILTERAMOUNT 0x0800001a
+
#define FMMOD 0x1b /* Vibrato/filter modulation from LFO register */
#define FMMOD_MODVIBRATO 0x0000ff00 /* Vibrato LFO modulation depth */
@@ -793,22 +793,19 @@
#define SRCS_SPDIFRATE_96 0x00080000
#define MICIDX 0x63 /* Microphone recording buffer index register */
-#define MICIDX_MASK 0x0000ffff /* 16-bit value */
-#define MICIDX_IDX 0x10000063
+SUB_REG(MICIDX, IDX, 0x0000ffff)
#define ADCIDX 0x64 /* ADC recording buffer index register */
-#define ADCIDX_MASK 0x0000ffff /* 16 bit index field */
-#define ADCIDX_IDX 0x10000064
+SUB_REG(ADCIDX, IDX, 0x0000ffff)
#define A_ADCIDX 0x63
-#define A_ADCIDX_IDX 0x10000063
+SUB_REG(A_ADCIDX, IDX, 0x0000ffff)
#define A_MICIDX 0x64
-#define A_MICIDX_IDX 0x10000064
+SUB_REG(A_MICIDX, IDX, 0x0000ffff)
#define FXIDX 0x65 /* FX recording buffer index register */
-#define FXIDX_MASK 0x0000ffff /* 16-bit value */
-#define FXIDX_IDX 0x10000065
+SUB_REG(FXIDX, IDX, 0x0000ffff)
/* The 32-bit HLIEx and HLIPx registers all have one bit per channel control/status */
#define HLIEL 0x66 /* Channel half loop interrupt enable low register */
@@ -852,8 +849,8 @@
#define A_SPDIF_44100 0x00000080
#define A_SPDIF_MUTED 0x000000c0
-#define A_I2S_CAPTURE_RATE_MASK 0x00000e00 /* This sets the capture PCM rate, but it is */
-#define A_I2S_CAPTURE_RATE 0x03090076 /* unclear if this sets the ADC rate as well. */
+SUB_REG_NC(A_EHC, A_I2S_CAPTURE_RATE, 0x00000e00) /* This sets the capture PCM rate, but it is */
+ /* unclear if this sets the ADC rate as well. */
#define A_I2S_CAPTURE_48000 0x0
#define A_I2S_CAPTURE_192000 0x1
#define A_I2S_CAPTURE_96000 0x2
--
2.40.0.152.g15d061e6df
