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/module.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 bool 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 DEFINE_PCI_DEVICE_TABLE(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_SCAP_POWER_SAVE; 164 ac97.private_data = cs5535au; 165 ac97.pci = cs5535au->pci; 166 167 /* set any OLPC-specific scaps */ 168 olpc_prequirks(card, &ac97); 169 170 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { 171 snd_printk(KERN_ERR "mixer failed\n"); 172 return err; 173 } 174 175 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); 176 177 err = olpc_quirks(card, cs5535au->ac97); 178 if (err < 0) { 179 snd_printk(KERN_ERR "olpc quirks failed\n"); 180 return err; 181 } 182 183 return 0; 184 } 185 186 static void process_bm0_irq(struct cs5535audio *cs5535au) 187 { 188 u8 bm_stat; 189 spin_lock(&cs5535au->reg_lock); 190 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS); 191 spin_unlock(&cs5535au->reg_lock); 192 if (bm_stat & EOP) { 193 struct cs5535audio_dma *dma; 194 dma = cs5535au->playback_substream->runtime->private_data; 195 snd_pcm_period_elapsed(cs5535au->playback_substream); 196 } else { 197 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n", 198 bm_stat); 199 } 200 } 201 202 static void process_bm1_irq(struct cs5535audio *cs5535au) 203 { 204 u8 bm_stat; 205 spin_lock(&cs5535au->reg_lock); 206 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS); 207 spin_unlock(&cs5535au->reg_lock); 208 if (bm_stat & EOP) { 209 struct cs5535audio_dma *dma; 210 dma = cs5535au->capture_substream->runtime->private_data; 211 snd_pcm_period_elapsed(cs5535au->capture_substream); 212 } 213 } 214 215 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id) 216 { 217 u16 acc_irq_stat; 218 unsigned char count; 219 struct cs5535audio *cs5535au = dev_id; 220 221 if (cs5535au == NULL) 222 return IRQ_NONE; 223 224 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS); 225 226 if (!acc_irq_stat) 227 return IRQ_NONE; 228 for (count = 0; count < 4; count++) { 229 if (acc_irq_stat & (1 << count)) { 230 switch (count) { 231 case IRQ_STS: 232 cs_readl(cs5535au, ACC_GPIO_STATUS); 233 break; 234 case WU_IRQ_STS: 235 cs_readl(cs5535au, ACC_GPIO_STATUS); 236 break; 237 case BM0_IRQ_STS: 238 process_bm0_irq(cs5535au); 239 break; 240 case BM1_IRQ_STS: 241 process_bm1_irq(cs5535au); 242 break; 243 default: 244 snd_printk(KERN_ERR "Unexpected irq src: " 245 "0x%x\n", acc_irq_stat); 246 break; 247 } 248 } 249 } 250 return IRQ_HANDLED; 251 } 252 253 static int snd_cs5535audio_free(struct cs5535audio *cs5535au) 254 { 255 synchronize_irq(cs5535au->irq); 256 pci_set_power_state(cs5535au->pci, 3); 257 258 if (cs5535au->irq >= 0) 259 free_irq(cs5535au->irq, cs5535au); 260 261 pci_release_regions(cs5535au->pci); 262 pci_disable_device(cs5535au->pci); 263 kfree(cs5535au); 264 return 0; 265 } 266 267 static int snd_cs5535audio_dev_free(struct snd_device *device) 268 { 269 struct cs5535audio *cs5535au = device->device_data; 270 return snd_cs5535audio_free(cs5535au); 271 } 272 273 static int __devinit snd_cs5535audio_create(struct snd_card *card, 274 struct pci_dev *pci, 275 struct cs5535audio **rcs5535au) 276 { 277 struct cs5535audio *cs5535au; 278 279 int err; 280 static struct snd_device_ops ops = { 281 .dev_free = snd_cs5535audio_dev_free, 282 }; 283 284 *rcs5535au = NULL; 285 if ((err = pci_enable_device(pci)) < 0) 286 return err; 287 288 if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0 || 289 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0) { 290 printk(KERN_WARNING "unable to get 32bit dma\n"); 291 err = -ENXIO; 292 goto pcifail; 293 } 294 295 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); 296 if (cs5535au == NULL) { 297 err = -ENOMEM; 298 goto pcifail; 299 } 300 301 spin_lock_init(&cs5535au->reg_lock); 302 cs5535au->card = card; 303 cs5535au->pci = pci; 304 cs5535au->irq = -1; 305 306 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { 307 kfree(cs5535au); 308 goto pcifail; 309 } 310 311 cs5535au->port = pci_resource_start(pci, 0); 312 313 if (request_irq(pci->irq, snd_cs5535audio_interrupt, 314 IRQF_SHARED, KBUILD_MODNAME, cs5535au)) { 315 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq); 316 err = -EBUSY; 317 goto sndfail; 318 } 319 320 cs5535au->irq = pci->irq; 321 pci_set_master(pci); 322 323 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 324 cs5535au, &ops)) < 0) 325 goto sndfail; 326 327 snd_card_set_dev(card, &pci->dev); 328 329 *rcs5535au = cs5535au; 330 return 0; 331 332 sndfail: /* leave the device alive, just kill the snd */ 333 snd_cs5535audio_free(cs5535au); 334 return err; 335 336 pcifail: 337 pci_disable_device(pci); 338 return err; 339 } 340 341 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci, 342 const struct pci_device_id *pci_id) 343 { 344 static int dev; 345 struct snd_card *card; 346 struct cs5535audio *cs5535au; 347 int err; 348 349 if (dev >= SNDRV_CARDS) 350 return -ENODEV; 351 if (!enable[dev]) { 352 dev++; 353 return -ENOENT; 354 } 355 356 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card); 357 if (err < 0) 358 return err; 359 360 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) 361 goto probefail_out; 362 363 card->private_data = cs5535au; 364 365 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) 366 goto probefail_out; 367 368 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) 369 goto probefail_out; 370 371 strcpy(card->driver, DRIVER_NAME); 372 373 strcpy(card->shortname, "CS5535 Audio"); 374 sprintf(card->longname, "%s %s at 0x%lx, irq %i", 375 card->shortname, card->driver, 376 cs5535au->port, cs5535au->irq); 377 378 if ((err = snd_card_register(card)) < 0) 379 goto probefail_out; 380 381 pci_set_drvdata(pci, card); 382 dev++; 383 return 0; 384 385 probefail_out: 386 snd_card_free(card); 387 return err; 388 } 389 390 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci) 391 { 392 olpc_quirks_cleanup(); 393 snd_card_free(pci_get_drvdata(pci)); 394 pci_set_drvdata(pci, NULL); 395 } 396 397 static struct pci_driver cs5535audio_driver = { 398 .name = KBUILD_MODNAME, 399 .id_table = snd_cs5535audio_ids, 400 .probe = snd_cs5535audio_probe, 401 .remove = __devexit_p(snd_cs5535audio_remove), 402 #ifdef CONFIG_PM_SLEEP 403 .driver = { 404 .pm = &snd_cs5535audio_pm, 405 }, 406 #endif 407 }; 408 409 module_pci_driver(cs5535audio_driver); 410 411 MODULE_AUTHOR("Jaya Kumar"); 412 MODULE_LICENSE("GPL"); 413 MODULE_DESCRIPTION("CS5535 Audio"); 414 MODULE_SUPPORTED_DEVICE("CS5535 Audio"); 415