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 int snd_sbdsp_create(struct snd_card *card, 172 unsigned long port, 173 int irq, 174 irq_handler_t irq_handler, 175 int dma8, 176 int dma16, 177 unsigned short hardware, 178 struct snd_sb **r_chip) 179 { 180 struct snd_sb *chip; 181 int err; 182 183 if (snd_BUG_ON(!r_chip)) 184 return -EINVAL; 185 *r_chip = NULL; 186 chip = devm_kzalloc(card->dev, sizeof(*chip), GFP_KERNEL); 187 if (!chip) 188 return -ENOMEM; 189 spin_lock_init(&chip->reg_lock); 190 spin_lock_init(&chip->open_lock); 191 spin_lock_init(&chip->midi_input_lock); 192 spin_lock_init(&chip->mixer_lock); 193 chip->irq = -1; 194 chip->dma8 = -1; 195 chip->dma16 = -1; 196 chip->port = port; 197 198 if (devm_request_irq(card->dev, irq, irq_handler, 199 (hardware == SB_HW_ALS4000 || 200 hardware == SB_HW_CS5530) ? 201 IRQF_SHARED : 0, 202 "SoundBlaster", (void *) chip)) { 203 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); 204 return -EBUSY; 205 } 206 chip->irq = irq; 207 card->sync_irq = chip->irq; 208 209 if (hardware == SB_HW_ALS4000) 210 goto __skip_allocation; 211 212 chip->res_port = devm_request_region(card->dev, port, 16, 213 "SoundBlaster"); 214 if (!chip->res_port) { 215 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port); 216 return -EBUSY; 217 } 218 219 #ifdef CONFIG_ISA 220 if (dma8 >= 0 && snd_devm_request_dma(card->dev, dma8, 221 "SoundBlaster - 8bit")) { 222 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8); 223 return -EBUSY; 224 } 225 chip->dma8 = dma8; 226 if (dma16 >= 0) { 227 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) { 228 /* no duplex */ 229 dma16 = -1; 230 } else if (snd_devm_request_dma(card->dev, dma16, 231 "SoundBlaster - 16bit")) { 232 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16); 233 return -EBUSY; 234 } 235 } 236 chip->dma16 = dma16; 237 #endif 238 239 __skip_allocation: 240 chip->card = card; 241 chip->hardware = hardware; 242 err = snd_sbdsp_probe(chip); 243 if (err < 0) 244 return err; 245 *r_chip = chip; 246 return 0; 247 } 248 249 EXPORT_SYMBOL(snd_sbdsp_command); 250 EXPORT_SYMBOL(snd_sbdsp_get_byte); 251 EXPORT_SYMBOL(snd_sbdsp_reset); 252 EXPORT_SYMBOL(snd_sbdsp_create); 253 /* sb_mixer.c */ 254 EXPORT_SYMBOL(snd_sbmixer_write); 255 EXPORT_SYMBOL(snd_sbmixer_read); 256 EXPORT_SYMBOL(snd_sbmixer_new); 257 EXPORT_SYMBOL(snd_sbmixer_add_ctl); 258 #ifdef CONFIG_PM 259 EXPORT_SYMBOL(snd_sbmixer_suspend); 260 EXPORT_SYMBOL(snd_sbmixer_resume); 261 #endif 262