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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | /* * Routine for IRQ handling from GF1/InterWave chip * Copyright (c) by Jaroslav Kysela <perex@suse.cz> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <sound/driver.h> #include <sound/core.h> #include <sound/info.h> #include <sound/gus.h> #ifdef CONFIG_SND_DEBUG #define STAT_ADD(x) ((x)++) #else #define STAT_ADD(x) while (0) { ; } #endif irqreturn_t snd_gus_interrupt(int irq, void *dev_id, struct pt_regs *regs) { snd_gus_card_t * gus = dev_id; unsigned char status; int loop = 100; int handled = 0; __again: status = inb(gus->gf1.reg_irqstat); if (status == 0) return IRQ_RETVAL(handled); handled = 1; // snd_printk("IRQ: status = 0x%x\n", status); if (status & 0x02) { STAT_ADD(gus->gf1.interrupt_stat_midi_in); gus->gf1.interrupt_handler_midi_in(gus); } if (status & 0x01) { STAT_ADD(gus->gf1.interrupt_stat_midi_out); gus->gf1.interrupt_handler_midi_out(gus); } if (status & (0x20 | 0x40)) { unsigned int already, _current_; unsigned char voice_status, voice; snd_gus_voice_t *pvoice; already = 0; while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { voice = voice_status & 0x1f; _current_ = 1 << voice; if (already & _current_) continue; /* multi request */ already |= _current_; /* mark request */ #if 0 printk("voice = %i, voice_status = 0x%x, voice_verify = %i\n", voice, voice_status, inb(GUSP(gus, GF1PAGE))); #endif pvoice = &gus->gf1.voices[voice]; if (pvoice->use) { if (!(voice_status & 0x80)) { /* voice position IRQ */ STAT_ADD(pvoice->interrupt_stat_wave); pvoice->handler_wave(gus, pvoice); } if (!(voice_status & 0x40)) { /* volume ramp IRQ */ STAT_ADD(pvoice->interrupt_stat_volume); pvoice->handler_volume(gus, pvoice); } } else { STAT_ADD(gus->gf1.interrupt_stat_voice_lost); snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); } } } if (status & 0x04) { STAT_ADD(gus->gf1.interrupt_stat_timer1); gus->gf1.interrupt_handler_timer1(gus); } if (status & 0x08) { STAT_ADD(gus->gf1.interrupt_stat_timer2); gus->gf1.interrupt_handler_timer2(gus); } if (status & 0x80) { if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { STAT_ADD(gus->gf1.interrupt_stat_dma_write); gus->gf1.interrupt_handler_dma_write(gus); } if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { STAT_ADD(gus->gf1.interrupt_stat_dma_read); gus->gf1.interrupt_handler_dma_read(gus); } } if (--loop > 0) goto __again; return IRQ_NONE; } #ifdef CONFIG_SND_DEBUG static void snd_gus_irq_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer) { snd_gus_card_t *gus; snd_gus_voice_t *pvoice; int idx; gus = entry->private_data; snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); for (idx = 0; idx < 32; idx++) { pvoice = &gus->gf1.voices[idx]; snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", idx, pvoice->interrupt_stat_wave, pvoice->interrupt_stat_volume); } } void snd_gus_irq_profile_init(snd_gus_card_t *gus) { snd_info_entry_t *entry; if (! snd_card_proc_new(gus->card, "gusirq", &entry)) snd_info_set_text_ops(entry, gus, 1024, snd_gus_irq_info_read); } #endif |