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[] __devinitdata = { 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 struct pt_regs *regs) 208 { 209 u16 acc_irq_stat; 210 u8 bm_stat; 211 unsigned char count; 212 struct cs5535audio *cs5535au = dev_id; 213 214 if (cs5535au == NULL) 215 return IRQ_NONE; 216 217 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS); 218 219 if (!acc_irq_stat) 220 return IRQ_NONE; 221 for (count = 0; count < 10; count++) { 222 if (acc_irq_stat & (1 << count)) { 223 switch (count) { 224 case IRQ_STS: 225 cs_readl(cs5535au, ACC_GPIO_STATUS); 226 break; 227 case WU_IRQ_STS: 228 cs_readl(cs5535au, ACC_GPIO_STATUS); 229 break; 230 case BM0_IRQ_STS: 231 process_bm0_irq(cs5535au); 232 break; 233 case BM1_IRQ_STS: 234 process_bm1_irq(cs5535au); 235 break; 236 case BM2_IRQ_STS: 237 bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS); 238 break; 239 case BM3_IRQ_STS: 240 bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS); 241 break; 242 case BM4_IRQ_STS: 243 bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS); 244 break; 245 case BM5_IRQ_STS: 246 bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS); 247 break; 248 case BM6_IRQ_STS: 249 bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS); 250 break; 251 case BM7_IRQ_STS: 252 bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS); 253 break; 254 default: 255 snd_printk(KERN_ERR "Unexpected irq src\n"); 256 break; 257 } 258 } 259 } 260 return IRQ_HANDLED; 261 } 262 263 static int snd_cs5535audio_free(struct cs5535audio *cs5535au) 264 { 265 synchronize_irq(cs5535au->irq); 266 pci_set_power_state(cs5535au->pci, 3); 267 268 if (cs5535au->irq >= 0) 269 free_irq(cs5535au->irq, cs5535au); 270 271 pci_release_regions(cs5535au->pci); 272 pci_disable_device(cs5535au->pci); 273 kfree(cs5535au); 274 return 0; 275 } 276 277 static int snd_cs5535audio_dev_free(struct snd_device *device) 278 { 279 struct cs5535audio *cs5535au = device->device_data; 280 return snd_cs5535audio_free(cs5535au); 281 } 282 283 static int __devinit snd_cs5535audio_create(struct snd_card *card, 284 struct pci_dev *pci, 285 struct cs5535audio **rcs5535au) 286 { 287 struct cs5535audio *cs5535au; 288 289 int err; 290 static struct snd_device_ops ops = { 291 .dev_free = snd_cs5535audio_dev_free, 292 }; 293 294 *rcs5535au = NULL; 295 if ((err = pci_enable_device(pci)) < 0) 296 return err; 297 298 if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 || 299 pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) { 300 printk(KERN_WARNING "unable to get 32bit dma\n"); 301 err = -ENXIO; 302 goto pcifail; 303 } 304 305 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); 306 if (cs5535au == NULL) { 307 err = -ENOMEM; 308 goto pcifail; 309 } 310 311 spin_lock_init(&cs5535au->reg_lock); 312 cs5535au->card = card; 313 cs5535au->pci = pci; 314 cs5535au->irq = -1; 315 316 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { 317 kfree(cs5535au); 318 goto pcifail; 319 } 320 321 cs5535au->port = pci_resource_start(pci, 0); 322 323 if (request_irq(pci->irq, snd_cs5535audio_interrupt, 324 SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", cs5535au)) { 325 snd_printk("unable to grab IRQ %d\n", pci->irq); 326 err = -EBUSY; 327 goto sndfail; 328 } 329 330 cs5535au->irq = pci->irq; 331 pci_set_master(pci); 332 333 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 334 cs5535au, &ops)) < 0) 335 goto sndfail; 336 337 snd_card_set_dev(card, &pci->dev); 338 339 *rcs5535au = cs5535au; 340 return 0; 341 342 sndfail: /* leave the device alive, just kill the snd */ 343 snd_cs5535audio_free(cs5535au); 344 return err; 345 346 pcifail: 347 pci_disable_device(pci); 348 return err; 349 } 350 351 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci, 352 const struct pci_device_id *pci_id) 353 { 354 static int dev; 355 struct snd_card *card; 356 struct cs5535audio *cs5535au; 357 int err; 358 359 if (dev >= SNDRV_CARDS) 360 return -ENODEV; 361 if (!enable[dev]) { 362 dev++; 363 return -ENOENT; 364 } 365 366 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 367 if (card == NULL) 368 return -ENOMEM; 369 370 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) 371 goto probefail_out; 372 373 card->private_data = cs5535au; 374 375 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) 376 goto probefail_out; 377 378 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) 379 goto probefail_out; 380 381 strcpy(card->driver, DRIVER_NAME); 382 383 strcpy(card->shortname, "CS5535 Audio"); 384 sprintf(card->longname, "%s %s at 0x%lx, irq %i", 385 card->shortname, card->driver, 386 cs5535au->port, cs5535au->irq); 387 388 if ((err = snd_card_register(card)) < 0) 389 goto probefail_out; 390 391 pci_set_drvdata(pci, card); 392 dev++; 393 return 0; 394 395 probefail_out: 396 snd_card_free(card); 397 return err; 398 } 399 400 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci) 401 { 402 snd_card_free(pci_get_drvdata(pci)); 403 pci_set_drvdata(pci, NULL); 404 } 405 406 static struct pci_driver driver = { 407 .name = DRIVER_NAME, 408 .id_table = snd_cs5535audio_ids, 409 .probe = snd_cs5535audio_probe, 410 .remove = __devexit_p(snd_cs5535audio_remove), 411 #ifdef CONFIG_PM 412 .suspend = snd_cs5535audio_suspend, 413 .resume = snd_cs5535audio_resume, 414 #endif 415 }; 416 417 static int __init alsa_card_cs5535audio_init(void) 418 { 419 return pci_register_driver(&driver); 420 } 421 422 static void __exit alsa_card_cs5535audio_exit(void) 423 { 424 pci_unregister_driver(&driver); 425 } 426 427 module_init(alsa_card_cs5535audio_init) 428 module_exit(alsa_card_cs5535audio_exit) 429 430 MODULE_AUTHOR("Jaya Kumar"); 431 MODULE_LICENSE("GPL"); 432 MODULE_DESCRIPTION("CS5535 Audio"); 433 MODULE_SUPPORTED_DEVICE("CS5535 Audio"); 434