diff options
Diffstat (limited to 'include/asm-sparc64/audioio.h')
| -rw-r--r-- | include/asm-sparc64/audioio.h | 164 |
1 files changed, 146 insertions, 18 deletions
diff --git a/include/asm-sparc64/audioio.h b/include/asm-sparc64/audioio.h index 01bebaf73..cb9a213a3 100644 --- a/include/asm-sparc64/audioio.h +++ b/include/asm-sparc64/audioio.h @@ -299,6 +299,8 @@ struct sparcaudio_driver /* Hack to make it look like we support variable size buffers. */ int buffer_size; + + int mixer_modify_counter; }; struct sparcaudio_operations @@ -432,23 +434,6 @@ extern int cs4231_init(void); #endif -/* Mixer helper ioctls */ -#define right(a) (((a >> 8) & 0xff) % 101) -#define left(a) ((a & 0xff) % 101) - -/* Macros to convert between mixer stereo volumes and gain (mono) */ -#define s_to_m(a) ((((left(a) + right(a)) * 255) / 200) % 256) -#define m_to_s(a) ((a * 100 / 255) + ((a * 100 / 255) << 8)) - -/* convert mixer stereo volume to balance */ -#define s_to_b(a) (s_to_g(a) == 0) ? 32 : ((left(a) * AUDIO_RIGHT_BALANCE / (left(a) + right(a)))) - -/* convert mixer stereo volume to audio gain */ -#define s_to_g(a) ((((right(a) + left(a)) * 255) / 200) % 256) - -/* convert gain a and balance b to mixer volume */ -#define b_to_s(a,b) (((((b * a * 200) / (AUDIO_RIGHT_BALANCE * 255)) % 100) << 8) + ((((AUDIO_RIGHT_BALANCE - b) * a * 200) / (AUDIO_RIGHT_BALANCE * 255)) % 100)) - /* Device minor numbers */ #define SPARCAUDIO_MIXER_MINOR 0 @@ -514,4 +499,147 @@ struct stdata #define I_GETSIG _IOR('S',012,int) #define I_GETSIG_SOLARIS (('S'<<8)|12) -#endif + +/* Conversion between Sun and OSS volume settings */ +static __inline__ +int OSS_LEFT(int value) +{ + return ((value & 0xff) % 101); +} + +static __inline__ +int OSS_RIGHT(int value) +{ + return (((value >> 8) & 0xff) % 101); +} + +static __inline__ +int O_TO_S(int value) +{ + return value * 255 / 100; +} + +static __inline__ +int S_TO_O(int value) +{ + return value * 100 / 255; +} + +static __inline__ +int OSS_TO_GAIN(int value) +{ + int l = O_TO_S(OSS_LEFT(value)); + int r = O_TO_S(OSS_RIGHT(value)); + return ((l > r) ? l : r); +} + +static __inline__ +int OSS_TO_LGAIN(int value) +{ + int l = O_TO_S(OSS_LEFT(value)); + int r = O_TO_S(OSS_RIGHT(value)); + return ((l < r) ? l : r); +} + +static __inline__ +int OSS_TO_BAL(int value) +{ + if (!OSS_TO_GAIN(value)) + return AUDIO_MID_BALANCE; + if (!OSS_TO_LGAIN(value)) { + if (OSS_TO_GAIN(value) == OSS_TO_GAIN(OSS_RIGHT(value))) + return AUDIO_RIGHT_BALANCE; + else + return AUDIO_LEFT_BALANCE; + } + if (OSS_TO_GAIN(value) == OSS_TO_GAIN(OSS_RIGHT(value))) + return ((OSS_TO_GAIN(value) - OSS_TO_LGAIN(value)) >> AUDIO_BALANCE_SHIFT) + + AUDIO_MID_BALANCE; + else + return AUDIO_MID_BALANCE - ((OSS_TO_GAIN(value) - OSS_TO_LGAIN(value)) + >> AUDIO_BALANCE_SHIFT); +} + +static __inline__ +int BAL_TO_OSS(int value, unsigned char balance) +{ + int l, r, adj; + if (balance > 63) balance = 63; + if (balance < AUDIO_MID_BALANCE) { + l = (int)value * 100 / 255 + ((value * 100 % 255) > 0); + adj = ((AUDIO_MID_BALANCE - balance) << AUDIO_BALANCE_SHIFT); + if (adj < value) + r = (int)(value - adj) + * 100 / 255; + else r = 0; + } else if (balance > AUDIO_MID_BALANCE) { + r = (int)value * 100 / 255 + ((value * 100 % 255) > 0); + adj = ((balance - AUDIO_MID_BALANCE) << AUDIO_BALANCE_SHIFT); + if (adj < value) + l = (int)(value - adj) + * 100 / 255; + else l = 0; + } else { + l = r = (int)value * 100 / 255 + ((value * 100 % 255) > 0); + } + + return ((r << 8) + l); +} + +/* OSS mixer ioctl port handling */ +static __inline__ +int OSS_PORT_AUDIO(struct sparcaudio_driver *drv, unsigned int set) +{ + int p; + if (drv->ops->get_output_port) { + p = drv->ops->get_output_port(drv); + if (p & set) + return 0x6464; + } + return 0; +} + +static __inline__ +int OSS_IPORT_AUDIO(struct sparcaudio_driver *drv, unsigned int set) +{ + int p; + if (drv->ops->get_input_port) { + p = drv->ops->get_input_port(drv); + if (p & set) + return 0x6464; + } + return 0; +} + +static __inline__ +void OSS_TWIDDLE_PORT(struct sparcaudio_driver *drv, unsigned int ioctl, + unsigned int port, unsigned int set, unsigned int value) +{ + if (ioctl == port) { + int p; + if (drv->ops->get_output_port && drv->ops->set_output_port) { + p = drv->ops->get_output_port(drv); + if ((value == 0) || ((p & set) && (OSS_LEFT(value) < 100))) + drv->ops->set_output_port(drv, p & ~(set)); + else + drv->ops->set_output_port(drv, p | set); + } + } +} + +static __inline__ +void OSS_TWIDDLE_IPORT(struct sparcaudio_driver *drv, unsigned int ioctl, + unsigned int port, unsigned int set, unsigned int value) +{ + if (ioctl == port) { + int p; + if (drv->ops->get_input_port && drv->ops->set_input_port) { + p = drv->ops->get_input_port(drv); + if ((value == 0) || ((p & set) && (OSS_LEFT(value) < 100))) + drv->ops->set_input_port(drv, p & ~(set)); + else + drv->ops->set_input_port(drv, p | set); + } + } +} +#endif /* _AUDIOIO_H_ */ |