1 /* 2 * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio 3 * 4 * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net> 5 * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk> 6 * 7 * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did 8 * mess with it a bit. The chip seems to have to have trouble with full duplex 9 * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to 10 * simultaneously play back audio at 16bit 44100kHz, the device actually plays 11 * back in the same format in which it is capturing. By forcing the chip to 12 * always play/capture in 16/44100, we can let alsa-lib convert the samples and 13 * that way we can hack up some full duplex audio. 14 * 15 * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems. 16 * The older version (VSA1) provides fairly good soundblaster emulation 17 * although there are a couple of bugs: large DMA buffers break record, 18 * and the MPU event handling seems suspect. VSA2 allows the native driver 19 * to control the AC97 audio engine directly and requires a different driver. 20 * 21 * Thanks to National Semiconductor for providing the needed information 22 * on the XpressAudio(tm) internals. 23 * 24 * This program is free software; you can redistribute it and/or modify it 25 * under the terms of the GNU General Public License as published by the 26 * Free Software Foundation; either version 2, or (at your option) any 27 * later version. 28 * 29 * This program is distributed in the hope that it will be useful, but 30 * WITHOUT ANY WARRANTY; without even the implied warranty of 31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 32 * General Public License for more details. 33 * 34 * TO DO: 35 * Investigate whether we can portably support Cognac (5520) in the 36 * same manner. 37 */ 38 39 #include <linux/delay.h> 40 #include <linux/module.h> 41 #include <linux/pci.h> 42 #include <linux/slab.h> 43 #include <sound/core.h> 44 #include <sound/sb.h> 45 #include <sound/initval.h> 46 47 MODULE_AUTHOR("Ash Willis"); 48 MODULE_DESCRIPTION("CS5530 Audio"); 49 MODULE_LICENSE("GPL"); 50 51 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 52 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 53 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 54 55 module_param_array(index, int, NULL, 0444); 56 MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver."); 57 module_param_array(id, charp, NULL, 0444); 58 MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver."); 59 module_param_array(enable, bool, NULL, 0444); 60 MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver."); 61 62 struct snd_cs5530 { 63 struct snd_card *card; 64 struct pci_dev *pci; 65 struct snd_sb *sb; 66 unsigned long pci_base; 67 }; 68 69 static DEFINE_PCI_DEVICE_TABLE(snd_cs5530_ids) = { 70 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID, 71 PCI_ANY_ID, 0, 0}, 72 {0,} 73 }; 74 75 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids); 76 77 static int snd_cs5530_free(struct snd_cs5530 *chip) 78 { 79 pci_release_regions(chip->pci); 80 pci_disable_device(chip->pci); 81 kfree(chip); 82 return 0; 83 } 84 85 static int snd_cs5530_dev_free(struct snd_device *device) 86 { 87 struct snd_cs5530 *chip = device->device_data; 88 return snd_cs5530_free(chip); 89 } 90 91 static void __devexit snd_cs5530_remove(struct pci_dev *pci) 92 { 93 snd_card_free(pci_get_drvdata(pci)); 94 pci_set_drvdata(pci, NULL); 95 } 96 97 static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg) 98 { 99 outb(reg, io + 4); 100 udelay(20); 101 reg = inb(io + 5); 102 udelay(20); 103 return reg; 104 } 105 106 static int __devinit snd_cs5530_create(struct snd_card *card, 107 struct pci_dev *pci, 108 struct snd_cs5530 **rchip) 109 { 110 struct snd_cs5530 *chip; 111 unsigned long sb_base; 112 u8 irq, dma8, dma16 = 0; 113 u16 map; 114 void __iomem *mem; 115 int err; 116 117 static struct snd_device_ops ops = { 118 .dev_free = snd_cs5530_dev_free, 119 }; 120 *rchip = NULL; 121 122 err = pci_enable_device(pci); 123 if (err < 0) 124 return err; 125 126 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 127 if (chip == NULL) { 128 pci_disable_device(pci); 129 return -ENOMEM; 130 } 131 132 chip->card = card; 133 chip->pci = pci; 134 135 err = pci_request_regions(pci, "CS5530"); 136 if (err < 0) { 137 kfree(chip); 138 pci_disable_device(pci); 139 return err; 140 } 141 chip->pci_base = pci_resource_start(pci, 0); 142 143 mem = pci_ioremap_bar(pci, 0); 144 if (mem == NULL) { 145 kfree(chip); 146 pci_disable_device(pci); 147 return -EBUSY; 148 } 149 150 map = readw(mem + 0x18); 151 iounmap(mem); 152 153 /* Map bits 154 0:1 * 0x20 + 0x200 = sb base 155 2 sb enable 156 3 adlib enable 157 5 MPU enable 0x330 158 6 MPU enable 0x300 159 160 The other bits may be used internally so must be masked */ 161 162 sb_base = 0x220 + 0x20 * (map & 3); 163 164 if (map & (1<<2)) 165 printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base); 166 else { 167 printk(KERN_ERR "Could not find XpressAudio!\n"); 168 snd_cs5530_free(chip); 169 return -ENODEV; 170 } 171 172 if (map & (1<<5)) 173 printk(KERN_INFO "CS5530: MPU at 0x300\n"); 174 else if (map & (1<<6)) 175 printk(KERN_INFO "CS5530: MPU at 0x330\n"); 176 177 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F; 178 dma8 = snd_cs5530_mixer_read(sb_base, 0x81); 179 180 if (dma8 & 0x20) 181 dma16 = 5; 182 else if (dma8 & 0x40) 183 dma16 = 6; 184 else if (dma8 & 0x80) 185 dma16 = 7; 186 else { 187 printk(KERN_ERR "CS5530: No 16bit DMA enabled\n"); 188 snd_cs5530_free(chip); 189 return -ENODEV; 190 } 191 192 if (dma8 & 0x01) 193 dma8 = 0; 194 else if (dma8 & 02) 195 dma8 = 1; 196 else if (dma8 & 0x08) 197 dma8 = 3; 198 else { 199 printk(KERN_ERR "CS5530: No 8bit DMA enabled\n"); 200 snd_cs5530_free(chip); 201 return -ENODEV; 202 } 203 204 if (irq & 1) 205 irq = 9; 206 else if (irq & 2) 207 irq = 5; 208 else if (irq & 4) 209 irq = 7; 210 else if (irq & 8) 211 irq = 10; 212 else { 213 printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n"); 214 snd_cs5530_free(chip); 215 return -ENODEV; 216 } 217 218 printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, 219 dma16); 220 221 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8, 222 dma16, SB_HW_CS5530, &chip->sb); 223 if (err < 0) { 224 printk(KERN_ERR "CS5530: Could not create SoundBlaster\n"); 225 snd_cs5530_free(chip); 226 return err; 227 } 228 229 err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm); 230 if (err < 0) { 231 printk(KERN_ERR "CS5530: Could not create PCM\n"); 232 snd_cs5530_free(chip); 233 return err; 234 } 235 236 err = snd_sbmixer_new(chip->sb); 237 if (err < 0) { 238 printk(KERN_ERR "CS5530: Could not create Mixer\n"); 239 snd_cs5530_free(chip); 240 return err; 241 } 242 243 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); 244 if (err < 0) { 245 snd_cs5530_free(chip); 246 return err; 247 } 248 249 snd_card_set_dev(card, &pci->dev); 250 *rchip = chip; 251 return 0; 252 } 253 254 static int __devinit snd_cs5530_probe(struct pci_dev *pci, 255 const struct pci_device_id *pci_id) 256 { 257 static int dev; 258 struct snd_card *card; 259 struct snd_cs5530 *chip = NULL; 260 int err; 261 262 if (dev >= SNDRV_CARDS) 263 return -ENODEV; 264 if (!enable[dev]) { 265 dev++; 266 return -ENOENT; 267 } 268 269 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card); 270 271 if (err < 0) 272 return err; 273 274 err = snd_cs5530_create(card, pci, &chip); 275 if (err < 0) { 276 snd_card_free(card); 277 return err; 278 } 279 280 strcpy(card->driver, "CS5530"); 281 strcpy(card->shortname, "CS5530 Audio"); 282 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base); 283 284 err = snd_card_register(card); 285 if (err < 0) { 286 snd_card_free(card); 287 return err; 288 } 289 pci_set_drvdata(pci, card); 290 dev++; 291 return 0; 292 } 293 294 static struct pci_driver driver = { 295 .name = KBUILD_MODNAME, 296 .id_table = snd_cs5530_ids, 297 .probe = snd_cs5530_probe, 298 .remove = __devexit_p(snd_cs5530_remove), 299 }; 300 301 static int __init alsa_card_cs5530_init(void) 302 { 303 return pci_register_driver(&driver); 304 } 305 306 static void __exit alsa_card_cs5530_exit(void) 307 { 308 pci_unregister_driver(&driver); 309 } 310 311 module_init(alsa_card_cs5530_init) 312 module_exit(alsa_card_cs5530_exit) 313 314