projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9ab4d072 SS |
1 | /* |
| 2 | * PC-Speaker driver for Linux | |
| 3 | * | |
| 4 | * Copyright (C) 1993-1997 Michael Beck | |
| 5 | * Copyright (C) 1997-2001 David Woodhouse | |
| 6 | * Copyright (C) 2001-2008 Stas Sergeev | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef __PCSP_H__ | |
| 10 | #define __PCSP_H__ | |
| 11 | ||
| 12 | #include <linux/hrtimer.h> | |
| 13 | #if defined(CONFIG_MIPS) || defined(CONFIG_X86) | |
| 14 | /* Use the global PIT lock ! */ | |
| 15 | #include <asm/i8253.h> | |
| 16 | #else | |
| 17 | #include <asm/8253pit.h> | |
| 18 | static DEFINE_SPINLOCK(i8253_lock); | |
| 19 | #endif | |
| 20 | ||
| 21 | #define PCSP_SOUND_VERSION 0x400 /* read 4.00 */ | |
| 22 | #define PCSP_DEBUG 0 | |
| 23 | ||
| 24 | /* default timer freq for PC-Speaker: 18643 Hz */ | |
| 25 | #define DIV_18KHZ 64 | |
| 26 | #define MAX_DIV DIV_18KHZ | |
| 97e08f5d SS |
27 | #define CALC_DIV(d) (MAX_DIV >> (d)) |
| 28 | #define CUR_DIV() CALC_DIV(chip->treble) | |
| 9ab4d072 SS |
29 | #define PCSP_MAX_TREBLE 1 |
| 30 | ||
| 31 | /* unfortunately, with hrtimers 37KHz does not work very well :( */ | |
| 32 | #define PCSP_DEFAULT_TREBLE 0 | |
| 33 | #define MIN_DIV (MAX_DIV >> PCSP_MAX_TREBLE) | |
| 34 | ||
| 35 | /* wild guess */ | |
| 36 | #define PCSP_MIN_LPJ 1000000 | |
| 37 | #define PCSP_DEFAULT_SDIV (DIV_18KHZ >> 1) | |
| 38 | #define PCSP_DEFAULT_SRATE (PIT_TICK_RATE / PCSP_DEFAULT_SDIV) | |
| 39 | #define PCSP_INDEX_INC() (1 << (PCSP_MAX_TREBLE - chip->treble)) | |
| 97e08f5d SS |
40 | #define PCSP_CALC_RATE(i) (PIT_TICK_RATE / CALC_DIV(i)) |
| 41 | #define PCSP_RATE() PCSP_CALC_RATE(chip->treble) | |
| 9ab4d072 SS |
42 | #define PCSP_MIN_RATE__1 MAX_DIV/PIT_TICK_RATE |
| 43 | #define PCSP_MAX_RATE__1 MIN_DIV/PIT_TICK_RATE | |
| 44 | #define PCSP_MAX_PERIOD_NS (1000000000ULL * PCSP_MIN_RATE__1) | |
| 45 | #define PCSP_MIN_PERIOD_NS (1000000000ULL * PCSP_MAX_RATE__1) | |
| 46 | #define PCSP_CALC_NS(div) ({ \ | |
| 47 | u64 __val = 1000000000ULL * (div); \ | |
| 48 | do_div(__val, PIT_TICK_RATE); \ | |
| 49 | __val; \ | |
| 50 | }) | |
| 51 | #define PCSP_PERIOD_NS() PCSP_CALC_NS(CUR_DIV()) | |
| 52 | ||
| 53 | #define PCSP_MAX_PERIOD_SIZE (64*1024) | |
| 54 | #define PCSP_MAX_PERIODS 512 | |
| 55 | #define PCSP_BUFFER_SIZE (128*1024) | |
| 56 | ||
| 57 | struct snd_pcsp { | |
| 58 | struct snd_card *card; | |
| 59 | struct snd_pcm *pcm; | |
| 60 | struct input_dev *input_dev; | |
| 61 | struct hrtimer timer; | |
| 62 | unsigned short port, irq, dma; | |
| 63 | spinlock_t substream_lock; | |
| 64 | struct snd_pcm_substream *playback_substream; | |
| eea0579f TI |
65 | unsigned int fmt_size; |
| 66 | unsigned int is_signed; | |
| 9ab4d072 SS |
67 | size_t playback_ptr; |
| 68 | size_t period_ptr; | |
| 69 | atomic_t timer_active; | |
| 70 | int thalf; | |
| 71 | u64 ns_rem; | |
| 72 | unsigned char val61; | |
| 73 | int enable; | |
| 74 | int max_treble; | |
| 75 | int treble; | |
| 76 | int pcspkr; | |
| 77 | }; | |
| 78 | ||
| 79 | extern struct snd_pcsp pcsp_chip; | |
| 80 | ||
| 81 | extern enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle); | |
| 96c7d478 | 82 | extern void pcsp_sync_stop(struct snd_pcsp *chip); |
| 9ab4d072 SS |
83 | |
| 84 | extern int snd_pcsp_new_pcm(struct snd_pcsp *chip); | |
| 85 | extern int snd_pcsp_new_mixer(struct snd_pcsp *chip); | |
| 86 | ||
| 87 | #endif |