1 /* 2 * Driver for audio on multifunction CS5535/6 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 static char *ac97_quirk; 44 module_param(ac97_quirk, charp, 0444); 45 MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds."); 46 47 static struct ac97_quirk ac97_quirks[] __devinitdata = { 48 #if 0 /* Not yet confirmed if all 5536 boards are HP only */ 49 { 50 .subvendor = PCI_VENDOR_ID_AMD, 51 .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO, 52 .name = "AMD RDK", 53 .type = AC97_TUNE_HP_ONLY 54 }, 55 #endif 56 {} 57 }; 58 59 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 60 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 61 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 62 63 module_param_array(index, int, NULL, 0444); 64 MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME); 65 module_param_array(id, charp, NULL, 0444); 66 MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME); 67 module_param_array(enable, bool, NULL, 0444); 68 MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME); 69 70 static struct pci_device_id snd_cs5535audio_ids[] = { 71 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) }, 72 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) }, 73 {} 74 }; 75 76 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids); 77 78 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout) 79 { 80 unsigned int tmp; 81 do { 82 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); 83 if (!(tmp & CMD_NEW)) 84 break; 85 udelay(1); 86 } while (--timeout); 87 if (!timeout) 88 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n"); 89 } 90 91 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, 92 unsigned short reg) 93 { 94 unsigned int regdata; 95 unsigned int timeout; 96 unsigned int val; 97 98 regdata = ((unsigned int) reg) << 24; 99 regdata |= ACC_CODEC_CNTL_RD_CMD; 100 regdata |= CMD_NEW; 101 102 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 103 wait_till_cmd_acked(cs5535au, 50); 104 105 timeout = 50; 106 do { 107 val = cs_readl(cs5535au, ACC_CODEC_STATUS); 108 if ((val & STS_NEW) && reg == (val >> 24)) 109 break; 110 udelay(1); 111 } while (--timeout); 112 if (!timeout) 113 snd_printk(KERN_ERR "Failure reading codec reg 0x%x," 114 "Last value=0x%x\n", reg, val); 115 116 return (unsigned short) val; 117 } 118 119 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au, 120 unsigned short reg, unsigned short val) 121 { 122 unsigned int regdata; 123 124 regdata = ((unsigned int) reg) << 24; 125 regdata |= val; 126 regdata &= CMD_MASK; 127 regdata |= CMD_NEW; 128 regdata &= ACC_CODEC_CNTL_WR_CMD; 129 130 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 131 wait_till_cmd_acked(cs5535au, 50); 132 } 133 134 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97, 135 unsigned short reg, unsigned short val) 136 { 137 struct cs5535audio *cs5535au = ac97->private_data; 138 snd_cs5535audio_codec_write(cs5535au, reg, val); 139 } 140 141 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97, 142 unsigned short reg) 143 { 144 struct cs5535audio *cs5535au = ac97->private_data; 145 return snd_cs5535audio_codec_read(cs5535au, reg); 146 } 147 148 static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au) 149 { 150 struct snd_card *card = cs5535au->card; 151 struct snd_ac97_bus *pbus; 152 struct snd_ac97_template ac97; 153 int err; 154 static struct snd_ac97_bus_ops ops = { 155 .write = snd_cs5535audio_ac97_codec_write, 156 .read = snd_cs5535audio_ac97_codec_read, 157 }; 158 159 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0) 160 return err; 161 162 memset(&ac97, 0, sizeof(ac97)); 163 ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM; 164 ac97.private_data = cs5535au; 165 ac97.pci = cs5535au->pci; 166 167 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { 168 snd_printk(KERN_ERR "mixer failed\n"); 169 return err; 170 } 171 172 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); 173 174 return 0; 175 } 176 177 static void process_bm0_irq(struct cs5535audio *cs5535au) 178 { 179 u8 bm_stat; 180 spin_lock(&cs5535au->reg_lock); 181 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS); 182 spin_unlock(&cs5535au->reg_lock); 183 if (bm_stat & EOP) { 184 struct cs5535audio_dma *dma; 185 dma = cs5535au->playback_substream->runtime->private_data; 186 snd_pcm_period_elapsed(cs5535au->playback_substream); 187 } else { 188 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n", 189 bm_stat); 190 } 191 } 192 193 static void process_bm1_irq(struct cs5535audio *cs5535au) 194 { 195 u8 bm_stat; 196 spin_lock(&cs5535au->reg_lock); 197 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS); 198 spin_unlock(&cs5535au->reg_lock); 199 if (bm_stat & EOP) { 200 struct cs5535audio_dma *dma; 201 dma = cs5535au->capture_substream->runtime->private_data; 202 snd_pcm_period_elapsed(cs5535au->capture_substream); 203 } 204 } 205 206 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id) 207 { 208 u16 acc_irq_stat; 209 u8 bm_stat; 210 unsigned char count; 211 struct cs5535audio *cs5535au = dev_id; 212 213 if (cs5535au == NULL) 214 return IRQ_NONE; 215 216 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS); 217 218 if (!acc_irq_stat) 219 return IRQ_NONE; 220 for (count = 0; count < 10; count++) { 221 if (acc_irq_stat & (1 << count)) { 222 switch (count) { 223 case IRQ_STS: 224 cs_readl(cs5535au, ACC_GPIO_STATUS); 225 break; 226 case WU_IRQ_STS: 227 cs_readl(cs5535au, ACC_GPIO_STATUS); 228 break; 229 case BM0_IRQ_STS: 230 process_bm0_irq(cs5535au); 231 break; 232 case BM1_IRQ_STS: 233 process_bm1_irq(cs5535au); 234 break; 235 case BM2_IRQ_STS: 236 bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS); 237 break; 238 case BM3_IRQ_STS: 239 bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS); 240 break; 241 case BM4_IRQ_STS: 242 bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS); 243 break; 244 case BM5_IRQ_STS: 245 bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS); 246 break; 247 case BM6_IRQ_STS: 248 bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS); 249 break; 250 case BM7_IRQ_STS: 251 bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS); 252 break; 253 default: 254 snd_printk(KERN_ERR "Unexpected irq src\n"); 255 break; 256 } 257 } 258 } 259 return IRQ_HANDLED; 260 } 261 262 static int snd_cs5535audio_free(struct cs5535audio *cs5535au) 263 { 264 synchronize_irq(cs5535au->irq); 265 pci_set_power_state(cs5535au->pci, 3); 266 267 if (cs5535au->irq >= 0) 268 free_irq(cs5535au->irq, cs5535au); 269 270 pci_release_regions(cs5535au->pci); 271 pci_disable_device(cs5535au->pci); 272 kfree(cs5535au); 273 return 0; 274 } 275 276 static int snd_cs5535audio_dev_free(struct snd_device *device) 277 { 278 struct cs5535audio *cs5535au = device->device_data; 279 return snd_cs5535audio_free(cs5535au); 280 } 281 282 static int __devinit snd_cs5535audio_create(struct snd_card *card, 283 struct pci_dev *pci, 284 struct cs5535audio **rcs5535au) 285 { 286 struct cs5535audio *cs5535au; 287 288 int err; 289 static struct snd_device_ops ops = { 290 .dev_free = snd_cs5535audio_dev_free, 291 }; 292 293 *rcs5535au = NULL; 294 if ((err = pci_enable_device(pci)) < 0) 295 return err; 296 297 if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 || 298 pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) { 299 printk(KERN_WARNING "unable to get 32bit dma\n"); 300 err = -ENXIO; 301 goto pcifail; 302 } 303 304 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); 305 if (cs5535au == NULL) { 306 err = -ENOMEM; 307 goto pcifail; 308 } 309 310 spin_lock_init(&cs5535au->reg_lock); 311 cs5535au->card = card; 312 cs5535au->pci = pci; 313 cs5535au->irq = -1; 314 315 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { 316 kfree(cs5535au); 317 goto pcifail; 318 } 319 320 cs5535au->port = pci_resource_start(pci, 0); 321 322 if (request_irq(pci->irq, snd_cs5535audio_interrupt, 323 IRQF_SHARED, "CS5535 Audio", cs5535au)) { 324 snd_printk("unable to grab IRQ %d\n", pci->irq); 325 err = -EBUSY; 326 goto sndfail; 327 } 328 329 cs5535au->irq = pci->irq; 330 pci_set_master(pci); 331 332 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 333 cs5535au, &ops)) < 0) 334 goto sndfail; 335 336 snd_card_set_dev(card, &pci->dev); 337 338 *rcs5535au = cs5535au; 339 return 0; 340 341 sndfail: /* leave the device alive, just kill the snd */ 342 snd_cs5535audio_free(cs5535au); 343 return err; 344 345 pcifail: 346 pci_disable_device(pci); 347 return err; 348 } 349 350 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci, 351 const struct pci_device_id *pci_id) 352 { 353 static int dev; 354 struct snd_card *card; 355 struct cs5535audio *cs5535au; 356 int err; 357 358 if (dev >= SNDRV_CARDS) 359 return -ENODEV; 360 if (!enable[dev]) { 361 dev++; 362 return -ENOENT; 363 } 364 365 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 366 if (card == NULL) 367 return -ENOMEM; 368 369 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) 370 goto probefail_out; 371 372 card->private_data = cs5535au; 373 374 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) 375 goto probefail_out; 376 377 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) 378 goto probefail_out; 379 380 strcpy(card->driver, DRIVER_NAME); 381 382 strcpy(card->shortname, "CS5535 Audio"); 383 sprintf(card->longname, "%s %s at 0x%lx, irq %i", 384 card->shortname, card->driver, 385 cs5535au->port, cs5535au->irq); 386 387 if ((err = snd_card_register(card)) < 0) 388 goto probefail_out; 389 390 pci_set_drvdata(pci, card); 391 dev++; 392 return 0; 393 394 probefail_out: 395 snd_card_free(card); 396 return err; 397 } 398 399 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci) 400 { 401 snd_card_free(pci_get_drvdata(pci)); 402 pci_set_drvdata(pci, NULL); 403 } 404 405 static struct pci_driver driver = { 406 .name = DRIVER_NAME, 407 .id_table = snd_cs5535audio_ids, 408 .probe = snd_cs5535audio_probe, 409 .remove = __devexit_p(snd_cs5535audio_remove), 410 #ifdef CONFIG_PM 411 .suspend = snd_cs5535audio_suspend, 412 .resume = snd_cs5535audio_resume, 413 #endif 414 }; 415 416 static int __init alsa_card_cs5535audio_init(void) 417 { 418 return pci_register_driver(&driver); 419 } 420 421 static void __exit alsa_card_cs5535audio_exit(void) 422 { 423 pci_unregister_driver(&driver); 424 } 425 426 module_init(alsa_card_cs5535audio_init) 427 module_exit(alsa_card_cs5535audio_exit) 428 429 MODULE_AUTHOR("Jaya Kumar"); 430 MODULE_LICENSE("GPL"); 431 MODULE_DESCRIPTION("CS5535 Audio"); 432 MODULE_SUPPORTED_DEVICE("CS5535 Audio"); 433