Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Routines for GF1 DMA control |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <asm/dma.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <sound/core.h> |
| 25 | #include <sound/gus.h> |
| 26 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 27 | static void snd_gf1_dma_ack(struct snd_gus_card * gus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | { |
| 29 | unsigned long flags; |
| 30 | |
| 31 | spin_lock_irqsave(&gus->reg_lock, flags); |
| 32 | snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, 0x00); |
| 33 | snd_gf1_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL); |
| 34 | spin_unlock_irqrestore(&gus->reg_lock, flags); |
| 35 | } |
| 36 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 37 | static void snd_gf1_dma_program(struct snd_gus_card * gus, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | unsigned int addr, |
| 39 | unsigned long buf_addr, |
| 40 | unsigned int count, |
| 41 | unsigned int cmd) |
| 42 | { |
| 43 | unsigned long flags; |
| 44 | unsigned int address; |
| 45 | unsigned char dma_cmd; |
| 46 | unsigned int address_high; |
| 47 | |
| 48 | // snd_printk("dma_transfer: addr=0x%x, buf=0x%lx, count=0x%x\n", addr, (long) buf, count); |
| 49 | |
| 50 | if (gus->gf1.dma1 > 3) { |
| 51 | if (gus->gf1.enh_mode) { |
| 52 | address = addr >> 1; |
| 53 | } else { |
| 54 | if (addr & 0x1f) { |
| 55 | snd_printd("snd_gf1_dma_transfer: unaligned address (0x%x)?\n", addr); |
| 56 | return; |
| 57 | } |
| 58 | address = (addr & 0x000c0000) | ((addr & 0x0003ffff) >> 1); |
| 59 | } |
| 60 | } else { |
| 61 | address = addr; |
| 62 | } |
| 63 | |
| 64 | dma_cmd = SNDRV_GF1_DMA_ENABLE | (unsigned short) cmd; |
| 65 | #if 0 |
| 66 | dma_cmd |= 0x08; |
| 67 | #endif |
| 68 | if (dma_cmd & SNDRV_GF1_DMA_16BIT) { |
| 69 | count++; |
| 70 | count &= ~1; /* align */ |
| 71 | } |
| 72 | if (gus->gf1.dma1 > 3) { |
| 73 | dma_cmd |= SNDRV_GF1_DMA_WIDTH16; |
| 74 | count++; |
| 75 | count &= ~1; /* align */ |
| 76 | } |
| 77 | snd_gf1_dma_ack(gus); |
| 78 | snd_dma_program(gus->gf1.dma1, buf_addr, count, dma_cmd & SNDRV_GF1_DMA_READ ? DMA_MODE_READ : DMA_MODE_WRITE); |
| 79 | #if 0 |
| 80 | snd_printk("address = 0x%x, count = 0x%x, dma_cmd = 0x%x\n", address << 1, count, dma_cmd); |
| 81 | #endif |
| 82 | spin_lock_irqsave(&gus->reg_lock, flags); |
| 83 | if (gus->gf1.enh_mode) { |
| 84 | address_high = ((address >> 16) & 0x000000f0) | (address & 0x0000000f); |
| 85 | snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4)); |
| 86 | snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_HIGH, (unsigned char) address_high); |
| 87 | } else |
| 88 | snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4)); |
| 89 | snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, dma_cmd); |
| 90 | spin_unlock_irqrestore(&gus->reg_lock, flags); |
| 91 | } |
| 92 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 93 | static struct snd_gf1_dma_block *snd_gf1_dma_next_block(struct snd_gus_card * gus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 95 | struct snd_gf1_dma_block *block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | /* PCM block have bigger priority than synthesizer one */ |
| 98 | if (gus->gf1.dma_data_pcm) { |
| 99 | block = gus->gf1.dma_data_pcm; |
| 100 | if (gus->gf1.dma_data_pcm_last == block) { |
| 101 | gus->gf1.dma_data_pcm = |
| 102 | gus->gf1.dma_data_pcm_last = NULL; |
| 103 | } else { |
| 104 | gus->gf1.dma_data_pcm = block->next; |
| 105 | } |
| 106 | } else if (gus->gf1.dma_data_synth) { |
| 107 | block = gus->gf1.dma_data_synth; |
| 108 | if (gus->gf1.dma_data_synth_last == block) { |
| 109 | gus->gf1.dma_data_synth = |
| 110 | gus->gf1.dma_data_synth_last = NULL; |
| 111 | } else { |
| 112 | gus->gf1.dma_data_synth = block->next; |
| 113 | } |
| 114 | } else { |
| 115 | block = NULL; |
| 116 | } |
| 117 | if (block) { |
| 118 | gus->gf1.dma_ack = block->ack; |
| 119 | gus->gf1.dma_private_data = block->private_data; |
| 120 | } |
| 121 | return block; |
| 122 | } |
| 123 | |
| 124 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 125 | static void snd_gf1_dma_interrupt(struct snd_gus_card * gus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 127 | struct snd_gf1_dma_block *block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | snd_gf1_dma_ack(gus); |
| 130 | if (gus->gf1.dma_ack) |
| 131 | gus->gf1.dma_ack(gus, gus->gf1.dma_private_data); |
| 132 | spin_lock(&gus->dma_lock); |
| 133 | if (gus->gf1.dma_data_pcm == NULL && |
| 134 | gus->gf1.dma_data_synth == NULL) { |
| 135 | gus->gf1.dma_ack = NULL; |
| 136 | gus->gf1.dma_flags &= ~SNDRV_GF1_DMA_TRIGGER; |
| 137 | spin_unlock(&gus->dma_lock); |
| 138 | return; |
| 139 | } |
| 140 | block = snd_gf1_dma_next_block(gus); |
| 141 | spin_unlock(&gus->dma_lock); |
| 142 | snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd); |
| 143 | kfree(block); |
| 144 | #if 0 |
| 145 | printk("program dma (IRQ) - addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n", addr, (long) buffer, count, cmd); |
| 146 | #endif |
| 147 | } |
| 148 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 149 | int snd_gf1_dma_init(struct snd_gus_card * gus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | { |
Ingo Molnar | 8b7547f | 2006-01-16 16:33:08 +0100 | [diff] [blame] | 151 | mutex_lock(&gus->dma_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | gus->gf1.dma_shared++; |
| 153 | if (gus->gf1.dma_shared > 1) { |
Ingo Molnar | 8b7547f | 2006-01-16 16:33:08 +0100 | [diff] [blame] | 154 | mutex_unlock(&gus->dma_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | return 0; |
| 156 | } |
| 157 | gus->gf1.interrupt_handler_dma_write = snd_gf1_dma_interrupt; |
| 158 | gus->gf1.dma_data_pcm = |
| 159 | gus->gf1.dma_data_pcm_last = |
| 160 | gus->gf1.dma_data_synth = |
| 161 | gus->gf1.dma_data_synth_last = NULL; |
Ingo Molnar | 8b7547f | 2006-01-16 16:33:08 +0100 | [diff] [blame] | 162 | mutex_unlock(&gus->dma_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return 0; |
| 164 | } |
| 165 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 166 | int snd_gf1_dma_done(struct snd_gus_card * gus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 168 | struct snd_gf1_dma_block *block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Ingo Molnar | 8b7547f | 2006-01-16 16:33:08 +0100 | [diff] [blame] | 170 | mutex_lock(&gus->dma_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | gus->gf1.dma_shared--; |
| 172 | if (!gus->gf1.dma_shared) { |
| 173 | snd_dma_disable(gus->gf1.dma1); |
| 174 | snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_WRITE); |
| 175 | snd_gf1_dma_ack(gus); |
| 176 | while ((block = gus->gf1.dma_data_pcm)) { |
| 177 | gus->gf1.dma_data_pcm = block->next; |
| 178 | kfree(block); |
| 179 | } |
| 180 | while ((block = gus->gf1.dma_data_synth)) { |
| 181 | gus->gf1.dma_data_synth = block->next; |
| 182 | kfree(block); |
| 183 | } |
| 184 | gus->gf1.dma_data_pcm_last = |
| 185 | gus->gf1.dma_data_synth_last = NULL; |
| 186 | } |
Ingo Molnar | 8b7547f | 2006-01-16 16:33:08 +0100 | [diff] [blame] | 187 | mutex_unlock(&gus->dma_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return 0; |
| 189 | } |
| 190 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 191 | int snd_gf1_dma_transfer_block(struct snd_gus_card * gus, |
| 192 | struct snd_gf1_dma_block * __block, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | int atomic, |
| 194 | int synth) |
| 195 | { |
| 196 | unsigned long flags; |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 197 | struct snd_gf1_dma_block *block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
| 199 | block = kmalloc(sizeof(*block), atomic ? GFP_ATOMIC : GFP_KERNEL); |
| 200 | if (block == NULL) { |
Takashi Iwai | 99b359b | 2005-10-20 18:26:44 +0200 | [diff] [blame] | 201 | snd_printk(KERN_ERR "gf1: DMA transfer failure; not enough memory\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | return -ENOMEM; |
| 203 | } |
| 204 | *block = *__block; |
| 205 | block->next = NULL; |
| 206 | #if 0 |
| 207 | printk("addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n", block->addr, (long) block->buffer, block->count, block->cmd); |
| 208 | #endif |
| 209 | #if 0 |
| 210 | printk("gus->gf1.dma_data_pcm_last = 0x%lx\n", (long)gus->gf1.dma_data_pcm_last); |
| 211 | printk("gus->gf1.dma_data_pcm = 0x%lx\n", (long)gus->gf1.dma_data_pcm); |
| 212 | #endif |
| 213 | spin_lock_irqsave(&gus->dma_lock, flags); |
| 214 | if (synth) { |
| 215 | if (gus->gf1.dma_data_synth_last) { |
| 216 | gus->gf1.dma_data_synth_last->next = block; |
| 217 | gus->gf1.dma_data_synth_last = block; |
| 218 | } else { |
| 219 | gus->gf1.dma_data_synth = |
| 220 | gus->gf1.dma_data_synth_last = block; |
| 221 | } |
| 222 | } else { |
| 223 | if (gus->gf1.dma_data_pcm_last) { |
| 224 | gus->gf1.dma_data_pcm_last->next = block; |
| 225 | gus->gf1.dma_data_pcm_last = block; |
| 226 | } else { |
| 227 | gus->gf1.dma_data_pcm = |
| 228 | gus->gf1.dma_data_pcm_last = block; |
| 229 | } |
| 230 | } |
| 231 | if (!(gus->gf1.dma_flags & SNDRV_GF1_DMA_TRIGGER)) { |
| 232 | gus->gf1.dma_flags |= SNDRV_GF1_DMA_TRIGGER; |
| 233 | block = snd_gf1_dma_next_block(gus); |
| 234 | spin_unlock_irqrestore(&gus->dma_lock, flags); |
| 235 | if (block == NULL) |
| 236 | return 0; |
| 237 | snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd); |
| 238 | kfree(block); |
| 239 | return 0; |
| 240 | } |
| 241 | spin_unlock_irqrestore(&gus->dma_lock, flags); |
| 242 | return 0; |
| 243 | } |