1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * Uros Bizjak <uros@kss-loka.si> 5 * 6 * Lowlevel routines for control of Sound Blaster cards 7 */ 8 9 #include <linux/delay.h> 10 #include <linux/init.h> 11 #include <linux/interrupt.h> 12 #include <linux/slab.h> 13 #include <linux/ioport.h> 14 #include <linux/module.h> 15 #include <linux/io.h> 16 #include <sound/core.h> 17 #include <sound/sb.h> 18 #include <sound/initval.h> 19 20 #include <asm/dma.h> 21 22 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 23 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards"); 24 MODULE_LICENSE("GPL"); 25 26 #define BUSY_LOOPS 100000 27 28 #undef IO_DEBUG 29 30 int snd_sbdsp_command(struct snd_sb *chip, unsigned char val) 31 { 32 int i; 33 #ifdef IO_DEBUG 34 snd_printk(KERN_DEBUG "command 0x%x\n", val); 35 #endif 36 for (i = BUSY_LOOPS; i; i--) 37 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) { 38 outb(val, SBP(chip, COMMAND)); 39 return 1; 40 } 41 snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val); 42 return 0; 43 } 44 45 int snd_sbdsp_get_byte(struct snd_sb *chip) 46 { 47 int val; 48 int i; 49 for (i = BUSY_LOOPS; i; i--) { 50 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { 51 val = inb(SBP(chip, READ)); 52 #ifdef IO_DEBUG 53 snd_printk(KERN_DEBUG "get_byte 0x%x\n", val); 54 #endif 55 return val; 56 } 57 } 58 snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port); 59 return -ENODEV; 60 } 61 62 int snd_sbdsp_reset(struct snd_sb *chip) 63 { 64 int i; 65 66 outb(1, SBP(chip, RESET)); 67 udelay(10); 68 outb(0, SBP(chip, RESET)); 69 udelay(30); 70 for (i = BUSY_LOOPS; i; i--) 71 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { 72 if (inb(SBP(chip, READ)) == 0xaa) 73 return 0; 74 else 75 break; 76 } 77 snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port); 78 return -ENODEV; 79 } 80 81 static int snd_sbdsp_version(struct snd_sb * chip) 82 { 83 unsigned int result; 84 85 snd_sbdsp_command(chip, SB_DSP_GET_VERSION); 86 result = (short) snd_sbdsp_get_byte(chip) << 8; 87 result |= (short) snd_sbdsp_get_byte(chip); 88 return result; 89 } 90 91 static int snd_sbdsp_probe(struct snd_sb * chip) 92 { 93 int version; 94 int major, minor; 95 char *str; 96 unsigned long flags; 97 98 /* 99 * initialization sequence 100 */ 101 102 spin_lock_irqsave(&chip->reg_lock, flags); 103 if (snd_sbdsp_reset(chip) < 0) { 104 spin_unlock_irqrestore(&chip->reg_lock, flags); 105 return -ENODEV; 106 } 107 version = snd_sbdsp_version(chip); 108 if (version < 0) { 109 spin_unlock_irqrestore(&chip->reg_lock, flags); 110 return -ENODEV; 111 } 112 spin_unlock_irqrestore(&chip->reg_lock, flags); 113 major = version >> 8; 114 minor = version & 0xff; 115 snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n", 116 chip->port, major, minor); 117 118 switch (chip->hardware) { 119 case SB_HW_AUTO: 120 switch (major) { 121 case 1: 122 chip->hardware = SB_HW_10; 123 str = "1.0"; 124 break; 125 case 2: 126 if (minor) { 127 chip->hardware = SB_HW_201; 128 str = "2.01+"; 129 } else { 130 chip->hardware = SB_HW_20; 131 str = "2.0"; 132 } 133 break; 134 case 3: 135 chip->hardware = SB_HW_PRO; 136 str = "Pro"; 137 break; 138 case 4: 139 chip->hardware = SB_HW_16; 140 str = "16"; 141 break; 142 default: 143 snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n", 144 chip->port, major, minor); 145 return -ENODEV; 146 } 147 break; 148 case SB_HW_ALS100: 149 str = "16 (ALS-100)"; 150 break; 151 case SB_HW_ALS4000: 152 str = "16 (ALS-4000)"; 153 break; 154 case SB_HW_DT019X: 155 str = "(DT019X/ALS007)"; 156 break; 157 case SB_HW_CS5530: 158 str = "16 (CS5530)"; 159 break; 160 case SB_HW_JAZZ16: 161 str = "Pro (Jazz16)"; 162 break; 163 default: 164 return -ENODEV; 165 } 166 sprintf(chip->name, "Sound Blaster %s", str); 167 chip->version = (major << 8) | minor; 168 return 0; 169 } 170 171 static int snd_sbdsp_free(struct snd_sb *chip) 172 { 173 release_and_free_resource(chip->res_port); 174 if (chip->irq >= 0) 175 free_irq(chip->irq, (void *) chip); 176 #ifdef CONFIG_ISA 177 if (chip->dma8 >= 0) { 178 disable_dma(chip->dma8); 179 free_dma(chip->dma8); 180 } 181 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) { 182 disable_dma(chip->dma16); 183 free_dma(chip->dma16); 184 } 185 #endif 186 kfree(chip); 187 return 0; 188 } 189 190 static int snd_sbdsp_dev_free(struct snd_device *device) 191 { 192 struct snd_sb *chip = device->device_data; 193 return snd_sbdsp_free(chip); 194 } 195 196 int snd_sbdsp_create(struct snd_card *card, 197 unsigned long port, 198 int irq, 199 irq_handler_t irq_handler, 200 int dma8, 201 int dma16, 202 unsigned short hardware, 203 struct snd_sb **r_chip) 204 { 205 struct snd_sb *chip; 206 int err; 207 static const struct snd_device_ops ops = { 208 .dev_free = snd_sbdsp_dev_free, 209 }; 210 211 if (snd_BUG_ON(!r_chip)) 212 return -EINVAL; 213 *r_chip = NULL; 214 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 215 if (chip == NULL) 216 return -ENOMEM; 217 spin_lock_init(&chip->reg_lock); 218 spin_lock_init(&chip->open_lock); 219 spin_lock_init(&chip->midi_input_lock); 220 spin_lock_init(&chip->mixer_lock); 221 chip->irq = -1; 222 chip->dma8 = -1; 223 chip->dma16 = -1; 224 chip->port = port; 225 226 if (request_irq(irq, irq_handler, 227 (hardware == SB_HW_ALS4000 || 228 hardware == SB_HW_CS5530) ? 229 IRQF_SHARED : 0, 230 "SoundBlaster", (void *) chip)) { 231 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); 232 snd_sbdsp_free(chip); 233 return -EBUSY; 234 } 235 chip->irq = irq; 236 card->sync_irq = chip->irq; 237 238 if (hardware == SB_HW_ALS4000) 239 goto __skip_allocation; 240 241 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) { 242 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port); 243 snd_sbdsp_free(chip); 244 return -EBUSY; 245 } 246 247 #ifdef CONFIG_ISA 248 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) { 249 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8); 250 snd_sbdsp_free(chip); 251 return -EBUSY; 252 } 253 chip->dma8 = dma8; 254 if (dma16 >= 0) { 255 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) { 256 /* no duplex */ 257 dma16 = -1; 258 } else if (request_dma(dma16, "SoundBlaster - 16bit")) { 259 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16); 260 snd_sbdsp_free(chip); 261 return -EBUSY; 262 } 263 } 264 chip->dma16 = dma16; 265 #endif 266 267 __skip_allocation: 268 chip->card = card; 269 chip->hardware = hardware; 270 if ((err = snd_sbdsp_probe(chip)) < 0) { 271 snd_sbdsp_free(chip); 272 return err; 273 } 274 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { 275 snd_sbdsp_free(chip); 276 return err; 277 } 278 *r_chip = chip; 279 return 0; 280 } 281 282 EXPORT_SYMBOL(snd_sbdsp_command); 283 EXPORT_SYMBOL(snd_sbdsp_get_byte); 284 EXPORT_SYMBOL(snd_sbdsp_reset); 285 EXPORT_SYMBOL(snd_sbdsp_create); 286 /* sb_mixer.c */ 287 EXPORT_SYMBOL(snd_sbmixer_write); 288 EXPORT_SYMBOL(snd_sbmixer_read); 289 EXPORT_SYMBOL(snd_sbmixer_new); 290 EXPORT_SYMBOL(snd_sbmixer_add_ctl); 291 #ifdef CONFIG_PM 292 EXPORT_SYMBOL(snd_sbmixer_suspend); 293 EXPORT_SYMBOL(snd_sbmixer_resume); 294 #endif 295