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(struct snd_sb *chip, unsigned char val) 45 { 46 int i; 47 #ifdef IO_DEBUG 48 snd_printk(KERN_DEBUG "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(struct snd_sb *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(KERN_DEBUG "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(struct snd_sb *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(struct snd_sb * 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(struct snd_sb * 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(KERN_INFO "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 case SB_HW_CS5530: 172 str = "16 (CS5530)"; 173 break; 174 default: 175 return -ENODEV; 176 } 177 sprintf(chip->name, "Sound Blaster %s", str); 178 chip->version = (major << 8) | minor; 179 return 0; 180 } 181 182 static int snd_sbdsp_free(struct snd_sb *chip) 183 { 184 if (chip->res_port) 185 release_and_free_resource(chip->res_port); 186 if (chip->irq >= 0) 187 free_irq(chip->irq, (void *) chip); 188 #ifdef CONFIG_ISA 189 if (chip->dma8 >= 0) { 190 disable_dma(chip->dma8); 191 free_dma(chip->dma8); 192 } 193 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) { 194 disable_dma(chip->dma16); 195 free_dma(chip->dma16); 196 } 197 #endif 198 kfree(chip); 199 return 0; 200 } 201 202 static int snd_sbdsp_dev_free(struct snd_device *device) 203 { 204 struct snd_sb *chip = device->device_data; 205 return snd_sbdsp_free(chip); 206 } 207 208 int snd_sbdsp_create(struct snd_card *card, 209 unsigned long port, 210 int irq, 211 irq_handler_t irq_handler, 212 int dma8, 213 int dma16, 214 unsigned short hardware, 215 struct snd_sb **r_chip) 216 { 217 struct snd_sb *chip; 218 int err; 219 static struct snd_device_ops ops = { 220 .dev_free = snd_sbdsp_dev_free, 221 }; 222 223 snd_assert(r_chip != NULL, return -EINVAL); 224 *r_chip = NULL; 225 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 226 if (chip == NULL) 227 return -ENOMEM; 228 spin_lock_init(&chip->reg_lock); 229 spin_lock_init(&chip->open_lock); 230 spin_lock_init(&chip->midi_input_lock); 231 spin_lock_init(&chip->mixer_lock); 232 chip->irq = -1; 233 chip->dma8 = -1; 234 chip->dma16 = -1; 235 chip->port = port; 236 237 if (request_irq(irq, irq_handler, 238 (hardware == SB_HW_ALS4000 || 239 hardware == SB_HW_CS5530) ? 240 IRQF_SHARED : IRQF_DISABLED, 241 "SoundBlaster", (void *) chip)) { 242 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); 243 snd_sbdsp_free(chip); 244 return -EBUSY; 245 } 246 chip->irq = irq; 247 248 if (hardware == SB_HW_ALS4000) 249 goto __skip_allocation; 250 251 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) { 252 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port); 253 snd_sbdsp_free(chip); 254 return -EBUSY; 255 } 256 257 #ifdef CONFIG_ISA 258 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) { 259 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8); 260 snd_sbdsp_free(chip); 261 return -EBUSY; 262 } 263 chip->dma8 = dma8; 264 if (dma16 >= 0) { 265 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) { 266 /* no duplex */ 267 dma16 = -1; 268 } else if (request_dma(dma16, "SoundBlaster - 16bit")) { 269 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16); 270 snd_sbdsp_free(chip); 271 return -EBUSY; 272 } 273 } 274 chip->dma16 = dma16; 275 #endif 276 277 __skip_allocation: 278 chip->card = card; 279 chip->hardware = hardware; 280 if ((err = snd_sbdsp_probe(chip)) < 0) { 281 snd_sbdsp_free(chip); 282 return err; 283 } 284 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { 285 snd_sbdsp_free(chip); 286 return err; 287 } 288 *r_chip = chip; 289 return 0; 290 } 291 292 EXPORT_SYMBOL(snd_sbdsp_command); 293 EXPORT_SYMBOL(snd_sbdsp_get_byte); 294 EXPORT_SYMBOL(snd_sbdsp_reset); 295 EXPORT_SYMBOL(snd_sbdsp_create); 296 /* sb_mixer.c */ 297 EXPORT_SYMBOL(snd_sbmixer_write); 298 EXPORT_SYMBOL(snd_sbmixer_read); 299 EXPORT_SYMBOL(snd_sbmixer_new); 300 EXPORT_SYMBOL(snd_sbmixer_add_ctl); 301 #ifdef CONFIG_PM 302 EXPORT_SYMBOL(snd_sbmixer_suspend); 303 EXPORT_SYMBOL(snd_sbmixer_resume); 304 #endif 305 306 /* 307 * INIT part 308 */ 309 310 static int __init alsa_sb_common_init(void) 311 { 312 return 0; 313 } 314 315 static void __exit alsa_sb_common_exit(void) 316 { 317 } 318 319 module_init(alsa_sb_common_init) 320 module_exit(alsa_sb_common_exit) 321