1 /* 2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 3 * Uros Bizjak <uros@kss-loka.si> 4 * 5 * Lowlevel routines for control of Sound Blaster cards 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23 #include <sound/driver.h> 24 #include <linux/delay.h> 25 #include <linux/init.h> 26 #include <linux/interrupt.h> 27 #include <linux/slab.h> 28 #include <linux/ioport.h> 29 #include <sound/core.h> 30 #include <sound/sb.h> 31 #include <sound/initval.h> 32 33 #include <asm/io.h> 34 #include <asm/dma.h> 35 36 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 37 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards"); 38 MODULE_LICENSE("GPL"); 39 40 #define BUSY_LOOPS 100000 41 42 #undef IO_DEBUG 43 44 int snd_sbdsp_command(sb_t *chip, unsigned char val) 45 { 46 int i; 47 #ifdef IO_DEBUG 48 snd_printk("command 0x%x\n", val); 49 #endif 50 for (i = BUSY_LOOPS; i; i--) 51 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) { 52 outb(val, SBP(chip, COMMAND)); 53 return 1; 54 } 55 snd_printd("%s [0x%lx]: timeout (0x%x)\n", __FUNCTION__, chip->port, val); 56 return 0; 57 } 58 59 int snd_sbdsp_get_byte(sb_t *chip) 60 { 61 int val; 62 int i; 63 for (i = BUSY_LOOPS; i; i--) { 64 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { 65 val = inb(SBP(chip, READ)); 66 #ifdef IO_DEBUG 67 snd_printk("get_byte 0x%x\n", val); 68 #endif 69 return val; 70 } 71 } 72 snd_printd("%s [0x%lx]: timeout\n", __FUNCTION__, chip->port); 73 return -ENODEV; 74 } 75 76 int snd_sbdsp_reset(sb_t *chip) 77 { 78 int i; 79 80 outb(1, SBP(chip, RESET)); 81 udelay(10); 82 outb(0, SBP(chip, RESET)); 83 udelay(30); 84 for (i = BUSY_LOOPS; i; i--) 85 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { 86 if (inb(SBP(chip, READ)) == 0xaa) 87 return 0; 88 else 89 break; 90 } 91 snd_printdd("%s [0x%lx] failed...\n", __FUNCTION__, chip->port); 92 return -ENODEV; 93 } 94 95 static int snd_sbdsp_version(sb_t * chip) 96 { 97 unsigned int result = -ENODEV; 98 99 snd_sbdsp_command(chip, SB_DSP_GET_VERSION); 100 result = (short) snd_sbdsp_get_byte(chip) << 8; 101 result |= (short) snd_sbdsp_get_byte(chip); 102 return result; 103 } 104 105 static int snd_sbdsp_probe(sb_t * chip) 106 { 107 int version; 108 int major, minor; 109 char *str; 110 unsigned long flags; 111 112 /* 113 * initialization sequence 114 */ 115 116 spin_lock_irqsave(&chip->reg_lock, flags); 117 if (snd_sbdsp_reset(chip) < 0) { 118 spin_unlock_irqrestore(&chip->reg_lock, flags); 119 return -ENODEV; 120 } 121 version = snd_sbdsp_version(chip); 122 if (version < 0) { 123 spin_unlock_irqrestore(&chip->reg_lock, flags); 124 return -ENODEV; 125 } 126 spin_unlock_irqrestore(&chip->reg_lock, flags); 127 major = version >> 8; 128 minor = version & 0xff; 129 snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n", 130 chip->port, major, minor); 131 132 switch (chip->hardware) { 133 case SB_HW_AUTO: 134 switch (major) { 135 case 1: 136 chip->hardware = SB_HW_10; 137 str = "1.0"; 138 break; 139 case 2: 140 if (minor) { 141 chip->hardware = SB_HW_201; 142 str = "2.01+"; 143 } else { 144 chip->hardware = SB_HW_20; 145 str = "2.0"; 146 } 147 break; 148 case 3: 149 chip->hardware = SB_HW_PRO; 150 str = "Pro"; 151 break; 152 case 4: 153 chip->hardware = SB_HW_16; 154 str = "16"; 155 break; 156 default: 157 snd_printk("SB [0x%lx]: unknown DSP chip version %i.%i\n", 158 chip->port, major, minor); 159 return -ENODEV; 160 } 161 break; 162 case SB_HW_ALS100: 163 str = "16 (ALS-100)"; 164 break; 165 case SB_HW_ALS4000: 166 str = "16 (ALS-4000)"; 167 break; 168 case SB_HW_DT019X: 169 str = "(DT019X/ALS007)"; 170 break; 171 default: 172 return -ENODEV; 173 } 174 sprintf(chip->name, "Sound Blaster %s", str); 175 chip->version = (major << 8) | minor; 176 return 0; 177 } 178 179 static int snd_sbdsp_free(sb_t *chip) 180 { 181 if (chip->res_port) { 182 release_resource(chip->res_port); 183 kfree_nocheck(chip->res_port); 184 } 185 if (chip->irq >= 0) 186 free_irq(chip->irq, (void *) chip); 187 #ifdef CONFIG_ISA 188 if (chip->dma8 >= 0) { 189 disable_dma(chip->dma8); 190 free_dma(chip->dma8); 191 } 192 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) { 193 disable_dma(chip->dma16); 194 free_dma(chip->dma16); 195 } 196 #endif 197 kfree(chip); 198 return 0; 199 } 200 201 static int snd_sbdsp_dev_free(snd_device_t *device) 202 { 203 sb_t *chip = device->device_data; 204 return snd_sbdsp_free(chip); 205 } 206 207 int snd_sbdsp_create(snd_card_t *card, 208 unsigned long port, 209 int irq, 210 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *), 211 int dma8, 212 int dma16, 213 unsigned short hardware, 214 sb_t **r_chip) 215 { 216 sb_t *chip; 217 int err; 218 static snd_device_ops_t ops = { 219 .dev_free = snd_sbdsp_dev_free, 220 }; 221 222 snd_assert(r_chip != NULL, return -EINVAL); 223 *r_chip = NULL; 224 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 225 if (chip == NULL) 226 return -ENOMEM; 227 spin_lock_init(&chip->reg_lock); 228 spin_lock_init(&chip->open_lock); 229 spin_lock_init(&chip->midi_input_lock); 230 spin_lock_init(&chip->mixer_lock); 231 chip->irq = -1; 232 chip->dma8 = -1; 233 chip->dma16 = -1; 234 chip->port = port; 235 236 if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ? 237 SA_INTERRUPT | SA_SHIRQ : SA_INTERRUPT, 238 "SoundBlaster", (void *) chip)) { 239 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); 240 snd_sbdsp_free(chip); 241 return -EBUSY; 242 } 243 chip->irq = irq; 244 245 if (hardware == SB_HW_ALS4000) 246 goto __skip_allocation; 247 248 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) { 249 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port); 250 snd_sbdsp_free(chip); 251 return -EBUSY; 252 } 253 254 #ifdef CONFIG_ISA 255 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) { 256 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8); 257 snd_sbdsp_free(chip); 258 return -EBUSY; 259 } 260 chip->dma8 = dma8; 261 if (dma16 >= 0) { 262 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) { 263 /* no duplex */ 264 dma16 = -1; 265 } else if (request_dma(dma16, "SoundBlaster - 16bit")) { 266 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16); 267 snd_sbdsp_free(chip); 268 return -EBUSY; 269 } 270 } 271 chip->dma16 = dma16; 272 #endif 273 274 __skip_allocation: 275 chip->card = card; 276 chip->hardware = hardware; 277 if ((err = snd_sbdsp_probe(chip)) < 0) { 278 snd_sbdsp_free(chip); 279 return err; 280 } 281 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { 282 snd_sbdsp_free(chip); 283 return err; 284 } 285 *r_chip = chip; 286 return 0; 287 } 288 289 EXPORT_SYMBOL(snd_sbdsp_command); 290 EXPORT_SYMBOL(snd_sbdsp_get_byte); 291 EXPORT_SYMBOL(snd_sbdsp_reset); 292 EXPORT_SYMBOL(snd_sbdsp_create); 293 /* sb_mixer.c */ 294 EXPORT_SYMBOL(snd_sbmixer_write); 295 EXPORT_SYMBOL(snd_sbmixer_read); 296 EXPORT_SYMBOL(snd_sbmixer_new); 297 EXPORT_SYMBOL(snd_sbmixer_add_ctl); 298 299 /* 300 * INIT part 301 */ 302 303 static int __init alsa_sb_common_init(void) 304 { 305 return 0; 306 } 307 308 static void __exit alsa_sb_common_exit(void) 309 { 310 } 311 312 module_init(alsa_sb_common_init) 313 module_exit(alsa_sb_common_exit) 314