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 <linux/delay.h> 25 #include <linux/interrupt.h> 26 #include <linux/init.h> 27 #include <linux/pci.h> 28 #include <linux/slab.h> 29 #include <linux/moduleparam.h> 30 #include <asm/io.h> 31 #include <sound/core.h> 32 #include <sound/control.h> 33 #include <sound/pcm.h> 34 #include <sound/rawmidi.h> 35 #include <sound/ac97_codec.h> 36 #include <sound/initval.h> 37 #include <sound/asoundef.h> 38 #include "cs5535audio.h" 39 40 #define DRIVER_NAME "cs5535audio" 41 42 static char *ac97_quirk; 43 module_param(ac97_quirk, charp, 0444); 44 MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds."); 45 46 static struct ac97_quirk ac97_quirks[] __devinitdata = { 47 #if 0 /* Not yet confirmed if all 5536 boards are HP only */ 48 { 49 .subvendor = PCI_VENDOR_ID_AMD, 50 .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO, 51 .name = "AMD RDK", 52 .type = AC97_TUNE_HP_ONLY 53 }, 54 #endif 55 {} 56 }; 57 58 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 59 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 60 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 61 62 module_param_array(index, int, NULL, 0444); 63 MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME); 64 module_param_array(id, charp, NULL, 0444); 65 MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME); 66 module_param_array(enable, bool, NULL, 0444); 67 MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME); 68 69 static struct pci_device_id snd_cs5535audio_ids[] = { 70 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) }, 71 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) }, 72 {} 73 }; 74 75 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids); 76 77 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout) 78 { 79 unsigned int tmp; 80 do { 81 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); 82 if (!(tmp & CMD_NEW)) 83 break; 84 udelay(1); 85 } while (--timeout); 86 if (!timeout) 87 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n"); 88 } 89 90 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, 91 unsigned short reg) 92 { 93 unsigned int regdata; 94 unsigned int timeout; 95 unsigned int val; 96 97 regdata = ((unsigned int) reg) << 24; 98 regdata |= ACC_CODEC_CNTL_RD_CMD; 99 regdata |= CMD_NEW; 100 101 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 102 wait_till_cmd_acked(cs5535au, 50); 103 104 timeout = 50; 105 do { 106 val = cs_readl(cs5535au, ACC_CODEC_STATUS); 107 if ((val & STS_NEW) && reg == (val >> 24)) 108 break; 109 udelay(1); 110 } while (--timeout); 111 if (!timeout) 112 snd_printk(KERN_ERR "Failure reading codec reg 0x%x," 113 "Last value=0x%x\n", reg, val); 114 115 return (unsigned short) val; 116 } 117 118 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au, 119 unsigned short reg, unsigned short val) 120 { 121 unsigned int regdata; 122 123 regdata = ((unsigned int) reg) << 24; 124 regdata |= val; 125 regdata &= CMD_MASK; 126 regdata |= CMD_NEW; 127 regdata &= ACC_CODEC_CNTL_WR_CMD; 128 129 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 130 wait_till_cmd_acked(cs5535au, 50); 131 } 132 133 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97, 134 unsigned short reg, unsigned short val) 135 { 136 struct cs5535audio *cs5535au = ac97->private_data; 137 snd_cs5535audio_codec_write(cs5535au, reg, val); 138 } 139 140 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97, 141 unsigned short reg) 142 { 143 struct cs5535audio *cs5535au = ac97->private_data; 144 return snd_cs5535audio_codec_read(cs5535au, reg); 145 } 146 147 static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au) 148 { 149 struct snd_card *card = cs5535au->card; 150 struct snd_ac97_bus *pbus; 151 struct snd_ac97_template ac97; 152 int err; 153 static struct snd_ac97_bus_ops ops = { 154 .write = snd_cs5535audio_ac97_codec_write, 155 .read = snd_cs5535audio_ac97_codec_read, 156 }; 157 158 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0) 159 return err; 160 161 memset(&ac97, 0, sizeof(ac97)); 162 ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM; 163 ac97.private_data = cs5535au; 164 ac97.pci = cs5535au->pci; 165 166 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { 167 snd_printk(KERN_ERR "mixer failed\n"); 168 return err; 169 } 170 171 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); 172 173 return 0; 174 } 175 176 static void process_bm0_irq(struct cs5535audio *cs5535au) 177 { 178 u8 bm_stat; 179 spin_lock(&cs5535au->reg_lock); 180 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS); 181 spin_unlock(&cs5535au->reg_lock); 182 if (bm_stat & EOP) { 183 struct cs5535audio_dma *dma; 184 dma = cs5535au->playback_substream->runtime->private_data; 185 snd_pcm_period_elapsed(cs5535au->playback_substream); 186 } else { 187 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n", 188 bm_stat); 189 } 190 } 191 192 static void process_bm1_irq(struct cs5535audio *cs5535au) 193 { 194 u8 bm_stat; 195 spin_lock(&cs5535au->reg_lock); 196 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS); 197 spin_unlock(&cs5535au->reg_lock); 198 if (bm_stat & EOP) { 199 struct cs5535audio_dma *dma; 200 dma = cs5535au->capture_substream->runtime->private_data; 201 snd_pcm_period_elapsed(cs5535au->capture_substream); 202 } 203 } 204 205 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id) 206 { 207 u16 acc_irq_stat; 208 unsigned char count; 209 struct cs5535audio *cs5535au = dev_id; 210 211 if (cs5535au == NULL) 212 return IRQ_NONE; 213 214 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS); 215 216 if (!acc_irq_stat) 217 return IRQ_NONE; 218 for (count = 0; count < 4; count++) { 219 if (acc_irq_stat & (1 << count)) { 220 switch (count) { 221 case IRQ_STS: 222 cs_readl(cs5535au, ACC_GPIO_STATUS); 223 break; 224 case WU_IRQ_STS: 225 cs_readl(cs5535au, ACC_GPIO_STATUS); 226 break; 227 case BM0_IRQ_STS: 228 process_bm0_irq(cs5535au); 229 break; 230 case BM1_IRQ_STS: 231 process_bm1_irq(cs5535au); 232 break; 233 default: 234 snd_printk(KERN_ERR "Unexpected irq src: " 235 "0x%x\n", acc_irq_stat); 236 break; 237 } 238 } 239 } 240 return IRQ_HANDLED; 241 } 242 243 static int snd_cs5535audio_free(struct cs5535audio *cs5535au) 244 { 245 synchronize_irq(cs5535au->irq); 246 pci_set_power_state(cs5535au->pci, 3); 247 248 if (cs5535au->irq >= 0) 249 free_irq(cs5535au->irq, cs5535au); 250 251 pci_release_regions(cs5535au->pci); 252 pci_disable_device(cs5535au->pci); 253 kfree(cs5535au); 254 return 0; 255 } 256 257 static int snd_cs5535audio_dev_free(struct snd_device *device) 258 { 259 struct cs5535audio *cs5535au = device->device_data; 260 return snd_cs5535audio_free(cs5535au); 261 } 262 263 static int __devinit snd_cs5535audio_create(struct snd_card *card, 264 struct pci_dev *pci, 265 struct cs5535audio **rcs5535au) 266 { 267 struct cs5535audio *cs5535au; 268 269 int err; 270 static struct snd_device_ops ops = { 271 .dev_free = snd_cs5535audio_dev_free, 272 }; 273 274 *rcs5535au = NULL; 275 if ((err = pci_enable_device(pci)) < 0) 276 return err; 277 278 if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 || 279 pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) { 280 printk(KERN_WARNING "unable to get 32bit dma\n"); 281 err = -ENXIO; 282 goto pcifail; 283 } 284 285 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); 286 if (cs5535au == NULL) { 287 err = -ENOMEM; 288 goto pcifail; 289 } 290 291 spin_lock_init(&cs5535au->reg_lock); 292 cs5535au->card = card; 293 cs5535au->pci = pci; 294 cs5535au->irq = -1; 295 296 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { 297 kfree(cs5535au); 298 goto pcifail; 299 } 300 301 cs5535au->port = pci_resource_start(pci, 0); 302 303 if (request_irq(pci->irq, snd_cs5535audio_interrupt, 304 IRQF_SHARED, "CS5535 Audio", cs5535au)) { 305 snd_printk("unable to grab IRQ %d\n", pci->irq); 306 err = -EBUSY; 307 goto sndfail; 308 } 309 310 cs5535au->irq = pci->irq; 311 pci_set_master(pci); 312 313 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 314 cs5535au, &ops)) < 0) 315 goto sndfail; 316 317 snd_card_set_dev(card, &pci->dev); 318 319 *rcs5535au = cs5535au; 320 return 0; 321 322 sndfail: /* leave the device alive, just kill the snd */ 323 snd_cs5535audio_free(cs5535au); 324 return err; 325 326 pcifail: 327 pci_disable_device(pci); 328 return err; 329 } 330 331 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci, 332 const struct pci_device_id *pci_id) 333 { 334 static int dev; 335 struct snd_card *card; 336 struct cs5535audio *cs5535au; 337 int err; 338 339 if (dev >= SNDRV_CARDS) 340 return -ENODEV; 341 if (!enable[dev]) { 342 dev++; 343 return -ENOENT; 344 } 345 346 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 347 if (card == NULL) 348 return -ENOMEM; 349 350 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) 351 goto probefail_out; 352 353 card->private_data = cs5535au; 354 355 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) 356 goto probefail_out; 357 358 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) 359 goto probefail_out; 360 361 strcpy(card->driver, DRIVER_NAME); 362 363 strcpy(card->shortname, "CS5535 Audio"); 364 sprintf(card->longname, "%s %s at 0x%lx, irq %i", 365 card->shortname, card->driver, 366 cs5535au->port, cs5535au->irq); 367 368 if ((err = snd_card_register(card)) < 0) 369 goto probefail_out; 370 371 pci_set_drvdata(pci, card); 372 dev++; 373 return 0; 374 375 probefail_out: 376 snd_card_free(card); 377 return err; 378 } 379 380 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci) 381 { 382 snd_card_free(pci_get_drvdata(pci)); 383 pci_set_drvdata(pci, NULL); 384 } 385 386 static struct pci_driver driver = { 387 .name = DRIVER_NAME, 388 .id_table = snd_cs5535audio_ids, 389 .probe = snd_cs5535audio_probe, 390 .remove = __devexit_p(snd_cs5535audio_remove), 391 #ifdef CONFIG_PM 392 .suspend = snd_cs5535audio_suspend, 393 .resume = snd_cs5535audio_resume, 394 #endif 395 }; 396 397 static int __init alsa_card_cs5535audio_init(void) 398 { 399 return pci_register_driver(&driver); 400 } 401 402 static void __exit alsa_card_cs5535audio_exit(void) 403 { 404 pci_unregister_driver(&driver); 405 } 406 407 module_init(alsa_card_cs5535audio_init) 408 module_exit(alsa_card_cs5535audio_exit) 409 410 MODULE_AUTHOR("Jaya Kumar"); 411 MODULE_LICENSE("GPL"); 412 MODULE_DESCRIPTION("CS5535 Audio"); 413 MODULE_SUPPORTED_DEVICE("CS5535 Audio"); 414