^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Mac bong noise generator. Note - we ought to put a boingy noise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * here 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * ----------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * 16.11.98:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * rewrote some functions, added support for Enhanced ASC (Quadras)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * after the NetBSD asc.c console bell patch by Colin Wood/Frederick Bruck
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Juergen Mellinger (juergen.mellinger@t-online.de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/macintosh.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/mac_asc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static int mac_asc_inited;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * dumb triangular wave table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static __u8 mac_asc_wave_tab[ 0x800 ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * Alan's original sine table; needs interpolating to 0x800
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static const signed char sine_data[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 0, 39, 75, 103, 121, 127, 121, 103, 75, 39,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 0, -39, -75, -103, -121, -127, -121, -103, -75, -39
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * where the ASC hides ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static volatile __u8* mac_asc_regs = ( void* )0x50F14000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * sample rate; is this a good default value?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static unsigned long mac_asc_samplespersec = 11050;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int mac_bell_duration;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static unsigned long mac_bell_phase; /* 0..2*Pi -> 0..0x800 (wavetable size) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static unsigned long mac_bell_phasepersample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * some function protos
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static void mac_init_asc( void );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void mac_nosound(struct timer_list *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static void mac_quadra_start_bell( unsigned int, unsigned int, unsigned int );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static void mac_quadra_ring_bell(struct timer_list *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void mac_av_start_bell( unsigned int, unsigned int, unsigned int );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static void ( *mac_special_bell )( unsigned int, unsigned int, unsigned int );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * our timer to start/continue/stop the bell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static DEFINE_TIMER(mac_sound_timer, mac_nosound);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * Sort of initialize the sound chip (called from mac_mksound on the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * beep).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static void mac_init_asc( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * do some machine specific initialization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * BTW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * the NetBSD Quadra patch identifies the Enhanced Apple Sound Chip via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * mac_asc_regs[ 0x800 ] & 0xF0 != 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * this makes no sense here, because we have to set the default sample
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * rate anyway if we want correct frequencies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) switch ( macintosh_config->ident )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) case MAC_MODEL_IIFX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * The IIfx is always special ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) mac_asc_regs = ( void* )0x50010000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * not sure about how correct this list is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * machines with the EASC enhanced apple sound chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) case MAC_MODEL_Q630:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) case MAC_MODEL_P475:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) mac_special_bell = mac_quadra_start_bell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) mac_asc_samplespersec = 22150;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) case MAC_MODEL_C660:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) case MAC_MODEL_Q840:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * The Quadra 660AV and 840AV use the "Singer" custom ASIC for sound I/O.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * It appears to be similar to the "AWACS" custom ASIC in the Power Mac
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * [678]100. Because Singer and AWACS may have a similar hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * interface, this would imply that the code in drivers/sound/dmasound.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * for AWACS could be used as a basis for Singer support. All we have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * do is figure out how to do DMA on the 660AV/840AV through the PSC and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * figure out where the Singer hardware sits in memory. (I'd look in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * vicinity of the AWACS location in a Power Mac [678]100 first, or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * current location of the Apple Sound Chip--ASC--in other Macs.) The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Power Mac [678]100 info can be found in MkLinux Mach kernel sources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * Quoted from Apple's Tech Info Library, article number 16405:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * "Among desktop Macintosh computers, only the 660AV, 840AV, and Power
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * Macintosh models have 16-bit audio input and output capability
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * because of the AT&T DSP3210 hardware circuitry and the 16-bit Singer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * codec circuitry in the AVs. The Audio Waveform Amplifier and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Converter (AWAC) chip in the Power Macintosh performs the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * 16-bit I/O functionality. The PowerBook 500 series computers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * support 16-bit stereo output, but only mono input."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * Technical Information Library (TIL) article number 16405.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * https://support.apple.com/kb/TA32601
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * --David Kilzer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) mac_special_bell = mac_av_start_bell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case MAC_MODEL_Q650:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) case MAC_MODEL_Q700:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) case MAC_MODEL_Q800:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) case MAC_MODEL_Q900:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case MAC_MODEL_Q950:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * Currently not implemented!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) mac_special_bell = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * Every switch needs a default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) mac_special_bell = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * init the wave table with a simple triangular wave
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * A sine wave would sure be nicer here ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) for ( i = 0; i < 0x400; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) mac_asc_wave_tab[ i ] = i / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) mac_asc_wave_tab[ i + 0x400 ] = 0xFF - i / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) mac_asc_inited = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * Called to make noise; current single entry to the boing driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * Does the job for simple ASC, calls other routines else.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * XXX Fixme:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * Should be split into asc_mksound, easc_mksound, av_mksound and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * function pointer set in mac_init_asc which would be called at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * init time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * _This_ is rather ugly ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) void mac_mksound( unsigned int freq, unsigned int length )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) __u32 cfreq = ( freq << 5 ) / 468;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if ( mac_special_bell == NULL )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /* Do nothing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if ( !mac_asc_inited )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) mac_init_asc();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if ( mac_special_bell )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) mac_special_bell( freq, length, 128 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if ( freq < 20 || freq > 20000 || length == 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) mac_nosound( 0 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) del_timer( &mac_sound_timer );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) for ( i = 0; i < 0x800; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) mac_asc_regs[ i ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) for ( i = 0; i < 0x800; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) mac_asc_regs[ i ] = mac_asc_wave_tab[ i ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) for ( i = 0; i < 8; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) *( __u32* )( ( __u32 )mac_asc_regs + ASC_CONTROL + 0x814 + 8 * i ) = cfreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) mac_asc_regs[ 0x807 ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) mac_asc_regs[ ASC_VOLUME ] = 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) mac_asc_regs[ 0x805 ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) mac_asc_regs[ 0x80F ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) mac_asc_regs[ ASC_MODE ] = ASC_MODE_SAMPLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) mac_asc_regs[ ASC_ENABLE ] = ASC_ENABLE_SAMPLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) mac_sound_timer.expires = jiffies + length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) add_timer( &mac_sound_timer );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * regular ASC: stop whining ..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static void mac_nosound(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) mac_asc_regs[ ASC_ENABLE ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * EASC entry; init EASC, don't load wavetable, schedule 'start whining'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void mac_quadra_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* if the bell is already ringing, ring longer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if ( mac_bell_duration > 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) mac_bell_duration += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) mac_bell_duration = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) mac_bell_phase = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) mac_bell_phasepersample = ( freq * sizeof( mac_asc_wave_tab ) ) / mac_asc_samplespersec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /* this is reasonably big for small frequencies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) /* set the volume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) mac_asc_regs[ 0x806 ] = volume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* set up the ASC registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if ( mac_asc_regs[ 0x801 ] != 1 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /* select mono mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) mac_asc_regs[ 0x807 ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* select sampled sound mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) mac_asc_regs[ 0x802 ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* ??? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) mac_asc_regs[ 0x801 ] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) mac_asc_regs[ 0x803 ] |= 0x80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) mac_asc_regs[ 0x803 ] &= 0x7F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) mac_sound_timer.function = mac_quadra_ring_bell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) mac_sound_timer.expires = jiffies + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) add_timer( &mac_sound_timer );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * EASC 'start/continue whining'; I'm not sure why the above function didn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * already load the wave table, or at least call this one...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * This piece keeps reloading the wave table until done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static void mac_quadra_ring_bell(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) int i, count = mac_asc_samplespersec / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * we neither want a sound buffer overflow nor underflow, so we need to match
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * the number of samples per timer interrupt as exactly as possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * using the asc interrupt will give better results in the future
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * ...and the possibility to use a real sample (a boingy noise, maybe...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) del_timer( &mac_sound_timer );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if ( mac_bell_duration-- > 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) for ( i = 0; i < count; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) mac_bell_phase += mac_bell_phasepersample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) mac_asc_regs[ 0 ] = mac_asc_wave_tab[ mac_bell_phase & ( sizeof( mac_asc_wave_tab ) - 1 ) ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) mac_sound_timer.expires = jiffies + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) add_timer( &mac_sound_timer );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) mac_asc_regs[ 0x801 ] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * AV code - please fill in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static void mac_av_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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