1 /* 2 * Driver for audio on multifunction CS5535 companion device 3 * Copyright (C) Jaya Kumar 4 * 5 * Based on Jaroslav Kysela and Takashi Iwai's examples. 6 * This work was sponsored by CIS(M) Sdn Bhd. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <sound/driver.h> 25 #include <linux/delay.h> 26 #include <linux/interrupt.h> 27 #include <linux/init.h> 28 #include <linux/pci.h> 29 #include <linux/slab.h> 30 #include <linux/moduleparam.h> 31 #include <asm/io.h> 32 #include <sound/core.h> 33 #include <sound/control.h> 34 #include <sound/pcm.h> 35 #include <sound/rawmidi.h> 36 #include <sound/ac97_codec.h> 37 #include <sound/initval.h> 38 #include <sound/asoundef.h> 39 #include "cs5535audio.h" 40 41 #define DRIVER_NAME "cs5535audio" 42 43 44 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 45 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 46 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 47 48 static struct pci_device_id snd_cs5535audio_ids[] = { 49 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO, 50 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, }, 51 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO, 52 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, }, 53 {} 54 }; 55 56 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids); 57 58 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout) 59 { 60 unsigned int tmp; 61 do { 62 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); 63 if (!(tmp & CMD_NEW)) 64 break; 65 udelay(1); 66 } while (--timeout); 67 if (!timeout) 68 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n"); 69 } 70 71 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, 72 unsigned short reg) 73 { 74 unsigned int regdata; 75 unsigned int timeout; 76 unsigned int val; 77 78 regdata = ((unsigned int) reg) << 24; 79 regdata |= ACC_CODEC_CNTL_RD_CMD; 80 regdata |= CMD_NEW; 81 82 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 83 wait_till_cmd_acked(cs5535au, 50); 84 85 timeout = 50; 86 do { 87 val = cs_readl(cs5535au, ACC_CODEC_STATUS); 88 if ((val & STS_NEW) && reg == (val >> 24)) 89 break; 90 udelay(1); 91 } while (--timeout); 92 if (!timeout) 93 snd_printk(KERN_ERR "Failure reading cs5535 codec\n"); 94 95 return (unsigned short) val; 96 } 97 98 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au, 99 unsigned short reg, unsigned short val) 100 { 101 unsigned int regdata; 102 103 regdata = ((unsigned int) reg) << 24; 104 regdata |= val; 105 regdata &= CMD_MASK; 106 regdata |= CMD_NEW; 107 regdata &= ACC_CODEC_CNTL_WR_CMD; 108 109 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 110 wait_till_cmd_acked(cs5535au, 50); 111 } 112 113 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97, 114 unsigned short reg, unsigned short val) 115 { 116 struct cs5535audio *cs5535au = ac97->private_data; 117 snd_cs5535audio_codec_write(cs5535au, reg, val); 118 } 119 120 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97, 121 unsigned short reg) 122 { 123 struct cs5535audio *cs5535au = ac97->private_data; 124 return snd_cs5535audio_codec_read(cs5535au, reg); 125 } 126 127 static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au) 128 { 129 struct snd_card *card = cs5535au->card; 130 struct snd_ac97_bus *pbus; 131 struct snd_ac97_template ac97; 132 int err; 133 static struct snd_ac97_bus_ops ops = { 134 .write = snd_cs5535audio_ac97_codec_write, 135 .read = snd_cs5535audio_ac97_codec_read, 136 }; 137 138 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0) 139 return err; 140 141 memset(&ac97, 0, sizeof(ac97)); 142 ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM; 143 ac97.private_data = cs5535au; 144 ac97.pci = cs5535au->pci; 145 146 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { 147 snd_printk(KERN_ERR "mixer failed\n"); 148 return err; 149 } 150 151 return 0; 152 } 153 154 static void process_bm0_irq(struct cs5535audio *cs5535au) 155 { 156 u8 bm_stat; 157 spin_lock(&cs5535au->reg_lock); 158 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS); 159 spin_unlock(&cs5535au->reg_lock); 160 if (bm_stat & EOP) { 161 struct cs5535audio_dma *dma; 162 dma = cs5535au->playback_substream->runtime->private_data; 163 snd_pcm_period_elapsed(cs5535au->playback_substream); 164 } else { 165 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n", 166 bm_stat); 167 } 168 } 169 170 static void process_bm1_irq(struct cs5535audio *cs5535au) 171 { 172 u8 bm_stat; 173 spin_lock(&cs5535au->reg_lock); 174 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS); 175 spin_unlock(&cs5535au->reg_lock); 176 if (bm_stat & EOP) { 177 struct cs5535audio_dma *dma; 178 dma = cs5535au->capture_substream->runtime->private_data; 179 snd_pcm_period_elapsed(cs5535au->capture_substream); 180 } 181 } 182 183 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id, 184 struct pt_regs *regs) 185 { 186 u16 acc_irq_stat; 187 u8 bm_stat; 188 unsigned char count; 189 struct cs5535audio *cs5535au = dev_id; 190 191 if (cs5535au == NULL) 192 return IRQ_NONE; 193 194 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS); 195 196 if (!acc_irq_stat) 197 return IRQ_NONE; 198 for (count = 0; count < 10; count++) { 199 if (acc_irq_stat & (1 << count)) { 200 switch (count) { 201 case IRQ_STS: 202 cs_readl(cs5535au, ACC_GPIO_STATUS); 203 break; 204 case WU_IRQ_STS: 205 cs_readl(cs5535au, ACC_GPIO_STATUS); 206 break; 207 case BM0_IRQ_STS: 208 process_bm0_irq(cs5535au); 209 break; 210 case BM1_IRQ_STS: 211 process_bm1_irq(cs5535au); 212 break; 213 case BM2_IRQ_STS: 214 bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS); 215 break; 216 case BM3_IRQ_STS: 217 bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS); 218 break; 219 case BM4_IRQ_STS: 220 bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS); 221 break; 222 case BM5_IRQ_STS: 223 bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS); 224 break; 225 case BM6_IRQ_STS: 226 bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS); 227 break; 228 case BM7_IRQ_STS: 229 bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS); 230 break; 231 default: 232 snd_printk(KERN_ERR "Unexpected irq src\n"); 233 break; 234 } 235 } 236 } 237 return IRQ_HANDLED; 238 } 239 240 static int snd_cs5535audio_free(struct cs5535audio *cs5535au) 241 { 242 synchronize_irq(cs5535au->irq); 243 pci_set_power_state(cs5535au->pci, 3); 244 245 if (cs5535au->irq >= 0) 246 free_irq(cs5535au->irq, cs5535au); 247 248 pci_release_regions(cs5535au->pci); 249 pci_disable_device(cs5535au->pci); 250 kfree(cs5535au); 251 return 0; 252 } 253 254 static int snd_cs5535audio_dev_free(struct snd_device *device) 255 { 256 struct cs5535audio *cs5535au = device->device_data; 257 return snd_cs5535audio_free(cs5535au); 258 } 259 260 static int __devinit snd_cs5535audio_create(struct snd_card *card, 261 struct pci_dev *pci, 262 struct cs5535audio **rcs5535au) 263 { 264 struct cs5535audio *cs5535au; 265 266 int err; 267 static struct snd_device_ops ops = { 268 .dev_free = snd_cs5535audio_dev_free, 269 }; 270 271 *rcs5535au = NULL; 272 if ((err = pci_enable_device(pci)) < 0) 273 return err; 274 275 if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 || 276 pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) { 277 printk(KERN_WARNING "unable to get 32bit dma\n"); 278 err = -ENXIO; 279 goto pcifail; 280 } 281 282 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); 283 if (cs5535au == NULL) { 284 err = -ENOMEM; 285 goto pcifail; 286 } 287 288 spin_lock_init(&cs5535au->reg_lock); 289 cs5535au->card = card; 290 cs5535au->pci = pci; 291 cs5535au->irq = -1; 292 293 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { 294 kfree(cs5535au); 295 goto pcifail; 296 } 297 298 cs5535au->port = pci_resource_start(pci, 0); 299 300 if (request_irq(pci->irq, snd_cs5535audio_interrupt, 301 SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", cs5535au)) { 302 snd_printk("unable to grab IRQ %d\n", pci->irq); 303 err = -EBUSY; 304 goto sndfail; 305 } 306 307 cs5535au->irq = pci->irq; 308 pci_set_master(pci); 309 310 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 311 cs5535au, &ops)) < 0) 312 goto sndfail; 313 314 snd_card_set_dev(card, &pci->dev); 315 316 *rcs5535au = cs5535au; 317 return 0; 318 319 sndfail: /* leave the device alive, just kill the snd */ 320 snd_cs5535audio_free(cs5535au); 321 return err; 322 323 pcifail: 324 pci_disable_device(pci); 325 return err; 326 } 327 328 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci, 329 const struct pci_device_id *pci_id) 330 { 331 static int dev; 332 struct snd_card *card; 333 struct cs5535audio *cs5535au; 334 int err; 335 336 if (dev >= SNDRV_CARDS) 337 return -ENODEV; 338 if (!enable[dev]) { 339 dev++; 340 return -ENOENT; 341 } 342 343 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 344 if (card == NULL) 345 return -ENOMEM; 346 347 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) 348 goto probefail_out; 349 350 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) 351 goto probefail_out; 352 353 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) 354 goto probefail_out; 355 356 strcpy(card->driver, DRIVER_NAME); 357 358 strcpy(card->shortname, "CS5535 Audio"); 359 sprintf(card->longname, "%s %s at 0x%lx, irq %i", 360 card->shortname, card->driver, 361 cs5535au->port, cs5535au->irq); 362 363 if ((err = snd_card_register(card)) < 0) 364 goto probefail_out; 365 366 pci_set_drvdata(pci, card); 367 dev++; 368 return 0; 369 370 probefail_out: 371 snd_card_free(card); 372 return err; 373 } 374 375 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci) 376 { 377 snd_card_free(pci_get_drvdata(pci)); 378 pci_set_drvdata(pci, NULL); 379 } 380 381 static struct pci_driver driver = { 382 .name = DRIVER_NAME, 383 .id_table = snd_cs5535audio_ids, 384 .probe = snd_cs5535audio_probe, 385 .remove = __devexit_p(snd_cs5535audio_remove), 386 }; 387 388 static int __init alsa_card_cs5535audio_init(void) 389 { 390 return pci_register_driver(&driver); 391 } 392 393 static void __exit alsa_card_cs5535audio_exit(void) 394 { 395 pci_unregister_driver(&driver); 396 } 397 398 module_init(alsa_card_cs5535audio_init) 399 module_exit(alsa_card_cs5535audio_exit) 400 401 MODULE_AUTHOR("Jaya Kumar"); 402 MODULE_LICENSE("GPL"); 403 MODULE_DESCRIPTION("CS5535 Audio"); 404 MODULE_SUPPORTED_DEVICE("CS5535 Audio"); 405