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 const struct pci_device_id 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 snd_cs5530_remove(struct pci_dev *pci) 92 { 93 snd_card_free(pci_get_drvdata(pci)); 94 } 95 96 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg) 97 { 98 outb(reg, io + 4); 99 udelay(20); 100 reg = inb(io + 5); 101 udelay(20); 102 return reg; 103 } 104 105 static int snd_cs5530_create(struct snd_card *card, 106 struct pci_dev *pci, 107 struct snd_cs5530 **rchip) 108 { 109 struct snd_cs5530 *chip; 110 unsigned long sb_base; 111 u8 irq, dma8, dma16 = 0; 112 u16 map; 113 void __iomem *mem; 114 int err; 115 116 static struct snd_device_ops ops = { 117 .dev_free = snd_cs5530_dev_free, 118 }; 119 *rchip = NULL; 120 121 err = pci_enable_device(pci); 122 if (err < 0) 123 return err; 124 125 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 126 if (chip == NULL) { 127 pci_disable_device(pci); 128 return -ENOMEM; 129 } 130 131 chip->card = card; 132 chip->pci = pci; 133 134 err = pci_request_regions(pci, "CS5530"); 135 if (err < 0) { 136 kfree(chip); 137 pci_disable_device(pci); 138 return err; 139 } 140 chip->pci_base = pci_resource_start(pci, 0); 141 142 mem = pci_ioremap_bar(pci, 0); 143 if (mem == NULL) { 144 snd_cs5530_free(chip); 145 return -EBUSY; 146 } 147 148 map = readw(mem + 0x18); 149 iounmap(mem); 150 151 /* Map bits 152 0:1 * 0x20 + 0x200 = sb base 153 2 sb enable 154 3 adlib enable 155 5 MPU enable 0x330 156 6 MPU enable 0x300 157 158 The other bits may be used internally so must be masked */ 159 160 sb_base = 0x220 + 0x20 * (map & 3); 161 162 if (map & (1<<2)) 163 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base); 164 else { 165 dev_err(card->dev, "Could not find XpressAudio!\n"); 166 snd_cs5530_free(chip); 167 return -ENODEV; 168 } 169 170 if (map & (1<<5)) 171 dev_info(card->dev, "MPU at 0x300\n"); 172 else if (map & (1<<6)) 173 dev_info(card->dev, "MPU at 0x330\n"); 174 175 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F; 176 dma8 = snd_cs5530_mixer_read(sb_base, 0x81); 177 178 if (dma8 & 0x20) 179 dma16 = 5; 180 else if (dma8 & 0x40) 181 dma16 = 6; 182 else if (dma8 & 0x80) 183 dma16 = 7; 184 else { 185 dev_err(card->dev, "No 16bit DMA enabled\n"); 186 snd_cs5530_free(chip); 187 return -ENODEV; 188 } 189 190 if (dma8 & 0x01) 191 dma8 = 0; 192 else if (dma8 & 02) 193 dma8 = 1; 194 else if (dma8 & 0x08) 195 dma8 = 3; 196 else { 197 dev_err(card->dev, "No 8bit DMA enabled\n"); 198 snd_cs5530_free(chip); 199 return -ENODEV; 200 } 201 202 if (irq & 1) 203 irq = 9; 204 else if (irq & 2) 205 irq = 5; 206 else if (irq & 4) 207 irq = 7; 208 else if (irq & 8) 209 irq = 10; 210 else { 211 dev_err(card->dev, "SoundBlaster IRQ not set\n"); 212 snd_cs5530_free(chip); 213 return -ENODEV; 214 } 215 216 dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16); 217 218 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8, 219 dma16, SB_HW_CS5530, &chip->sb); 220 if (err < 0) { 221 dev_err(card->dev, "Could not create SoundBlaster\n"); 222 snd_cs5530_free(chip); 223 return err; 224 } 225 226 err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm); 227 if (err < 0) { 228 dev_err(card->dev, "Could not create PCM\n"); 229 snd_cs5530_free(chip); 230 return err; 231 } 232 233 err = snd_sbmixer_new(chip->sb); 234 if (err < 0) { 235 dev_err(card->dev, "Could not create Mixer\n"); 236 snd_cs5530_free(chip); 237 return err; 238 } 239 240 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); 241 if (err < 0) { 242 snd_cs5530_free(chip); 243 return err; 244 } 245 246 *rchip = chip; 247 return 0; 248 } 249 250 static int snd_cs5530_probe(struct pci_dev *pci, 251 const struct pci_device_id *pci_id) 252 { 253 static int dev; 254 struct snd_card *card; 255 struct snd_cs5530 *chip = NULL; 256 int err; 257 258 if (dev >= SNDRV_CARDS) 259 return -ENODEV; 260 if (!enable[dev]) { 261 dev++; 262 return -ENOENT; 263 } 264 265 err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE, 266 0, &card); 267 268 if (err < 0) 269 return err; 270 271 err = snd_cs5530_create(card, pci, &chip); 272 if (err < 0) { 273 snd_card_free(card); 274 return err; 275 } 276 277 strcpy(card->driver, "CS5530"); 278 strcpy(card->shortname, "CS5530 Audio"); 279 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base); 280 281 err = snd_card_register(card); 282 if (err < 0) { 283 snd_card_free(card); 284 return err; 285 } 286 pci_set_drvdata(pci, card); 287 dev++; 288 return 0; 289 } 290 291 static struct pci_driver cs5530_driver = { 292 .name = KBUILD_MODNAME, 293 .id_table = snd_cs5530_ids, 294 .probe = snd_cs5530_probe, 295 .remove = snd_cs5530_remove, 296 }; 297 298 module_pci_driver(cs5530_driver); 299