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 42static char *ac97_quirk; 43module_param(ac97_quirk, charp, 0444); 44MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds."); 45 46static struct ac97_quirk ac97_quirks[] __devinitdata = { 47 {} 48}; 49 50static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 51static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 52static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 53 54module_param_array(index, int, NULL, 0444); 55MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME); 56module_param_array(id, charp, NULL, 0444); 57MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME); 58module_param_array(enable, bool, NULL, 0444); 59MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME); 60 61static DEFINE_PCI_DEVICE_TABLE(snd_cs5535audio_ids) = { 62 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) }, 63 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) }, 64 {} 65}; 66 67MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids); 68 69static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout) 70{ 71 unsigned int tmp; 72 do { 73 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); 74 if (!(tmp & CMD_NEW)) 75 break; 76 udelay(1); 77 } while (--timeout); 78 if (!timeout) 79 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n"); 80} 81 82static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, 83 unsigned short reg) 84{ 85 unsigned int regdata; 86 unsigned int timeout; 87 unsigned int val; 88 89 regdata = ((unsigned int) reg) << 24; 90 regdata |= ACC_CODEC_CNTL_RD_CMD; 91 regdata |= CMD_NEW; 92 93 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 94 wait_till_cmd_acked(cs5535au, 50); 95 96 timeout = 50; 97 do { 98 val = cs_readl(cs5535au, ACC_CODEC_STATUS); 99 if ((val & STS_NEW) && reg == (val >> 24)) 100 break; 101 udelay(1); 102 } while (--timeout); 103 if (!timeout) 104 snd_printk(KERN_ERR "Failure reading codec reg 0x%x," 105 "Last value=0x%x\n", reg, val); 106 107 return (unsigned short) val; 108} 109 110static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au, 111 unsigned short reg, unsigned short val) 112{ 113 unsigned int regdata; 114 115 regdata = ((unsigned int) reg) << 24; 116 regdata |= val; 117 regdata &= CMD_MASK; 118 regdata |= CMD_NEW; 119 regdata &= ACC_CODEC_CNTL_WR_CMD; 120 121 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); 122 wait_till_cmd_acked(cs5535au, 50); 123} 124 125static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97, 126 unsigned short reg, unsigned short val) 127{ 128 struct cs5535audio *cs5535au = ac97->private_data; 129 snd_cs5535audio_codec_write(cs5535au, reg, val); 130} 131 132static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97, 133 unsigned short reg) 134{ 135 struct cs5535audio *cs5535au = ac97->private_data; 136 return snd_cs5535audio_codec_read(cs5535au, reg); 137} 138 139static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au) 140{ 141 struct snd_card *card = cs5535au->card; 142 struct snd_ac97_bus *pbus; 143 struct snd_ac97_template ac97; 144 int err; 145 static struct snd_ac97_bus_ops ops = { 146 .write = snd_cs5535audio_ac97_codec_write, 147 .read = snd_cs5535audio_ac97_codec_read, 148 }; 149 150 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0) 151 return err; 152 153 memset(&ac97, 0, sizeof(ac97)); 154 ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM 155 | AC97_SCAP_POWER_SAVE; 156 ac97.private_data = cs5535au; 157 ac97.pci = cs5535au->pci; 158 159 /* set any OLPC-specific scaps */ 160 olpc_prequirks(card, &ac97); 161 162 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { 163 snd_printk(KERN_ERR "mixer failed\n"); 164 return err; 165 } 166 167 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); 168 169 err = olpc_quirks(card, cs5535au->ac97); 170 if (err < 0) { 171 snd_printk(KERN_ERR "olpc quirks failed\n"); 172 return err; 173 } 174 175 return 0; 176} 177 178static void process_bm0_irq(struct cs5535audio *cs5535au) 179{ 180 u8 bm_stat; 181 spin_lock(&cs5535au->reg_lock); 182 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS); 183 spin_unlock(&cs5535au->reg_lock); 184 if (bm_stat & EOP) { 185 struct cs5535audio_dma *dma; 186 dma = cs5535au->playback_substream->runtime->private_data; 187 snd_pcm_period_elapsed(cs5535au->playback_substream); 188 } else { 189 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n", 190 bm_stat); 191 } 192} 193 194static void process_bm1_irq(struct cs5535audio *cs5535au) 195{ 196 u8 bm_stat; 197 spin_lock(&cs5535au->reg_lock); 198 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS); 199 spin_unlock(&cs5535au->reg_lock); 200 if (bm_stat & EOP) { 201 struct cs5535audio_dma *dma; 202 dma = cs5535au->capture_substream->runtime->private_data; 203 snd_pcm_period_elapsed(cs5535au->capture_substream); 204 } 205} 206 207static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id) 208{ 209 u16 acc_irq_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 < 4; 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 default: 236 snd_printk(KERN_ERR "Unexpected irq src: " 237 "0x%x\n", acc_irq_stat); 238 break; 239 } 240 } 241 } 242 return IRQ_HANDLED; 243} 244 245static int snd_cs5535audio_free(struct cs5535audio *cs5535au) 246{ 247 synchronize_irq(cs5535au->irq); 248 pci_set_power_state(cs5535au->pci, 3); 249 250 if (cs5535au->irq >= 0) 251 free_irq(cs5535au->irq, cs5535au); 252 253 pci_release_regions(cs5535au->pci); 254 pci_disable_device(cs5535au->pci); 255 kfree(cs5535au); 256 return 0; 257} 258 259static int snd_cs5535audio_dev_free(struct snd_device *device) 260{ 261 struct cs5535audio *cs5535au = device->device_data; 262 return snd_cs5535audio_free(cs5535au); 263} 264 265static int __devinit snd_cs5535audio_create(struct snd_card *card, 266 struct pci_dev *pci, 267 struct cs5535audio **rcs5535au) 268{ 269 struct cs5535audio *cs5535au; 270 271 int err; 272 static struct snd_device_ops ops = { 273 .dev_free = snd_cs5535audio_dev_free, 274 }; 275 276 *rcs5535au = NULL; 277 if ((err = pci_enable_device(pci)) < 0) 278 return err; 279 280 if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0 || 281 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0) { 282 printk(KERN_WARNING "unable to get 32bit dma\n"); 283 err = -ENXIO; 284 goto pcifail; 285 } 286 287 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); 288 if (cs5535au == NULL) { 289 err = -ENOMEM; 290 goto pcifail; 291 } 292 293 spin_lock_init(&cs5535au->reg_lock); 294 cs5535au->card = card; 295 cs5535au->pci = pci; 296 cs5535au->irq = -1; 297 298 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { 299 kfree(cs5535au); 300 goto pcifail; 301 } 302 303 cs5535au->port = pci_resource_start(pci, 0); 304 305 if (request_irq(pci->irq, snd_cs5535audio_interrupt, 306 IRQF_SHARED, "CS5535 Audio", cs5535au)) { 307 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq); 308 err = -EBUSY; 309 goto sndfail; 310 } 311 312 cs5535au->irq = pci->irq; 313 pci_set_master(pci); 314 315 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 316 cs5535au, &ops)) < 0) 317 goto sndfail; 318 319 snd_card_set_dev(card, &pci->dev); 320 321 *rcs5535au = cs5535au; 322 return 0; 323 324sndfail: /* leave the device alive, just kill the snd */ 325 snd_cs5535audio_free(cs5535au); 326 return err; 327 328pcifail: 329 pci_disable_device(pci); 330 return err; 331} 332 333static int __devinit snd_cs5535audio_probe(struct pci_dev *pci, 334 const struct pci_device_id *pci_id) 335{ 336 static int dev; 337 struct snd_card *card; 338 struct cs5535audio *cs5535au; 339 int err; 340 341 if (dev >= SNDRV_CARDS) 342 return -ENODEV; 343 if (!enable[dev]) { 344 dev++; 345 return -ENOENT; 346 } 347 348 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card); 349 if (err < 0) 350 return err; 351 352 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) 353 goto probefail_out; 354 355 card->private_data = cs5535au; 356 357 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) 358 goto probefail_out; 359 360 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) 361 goto probefail_out; 362 363 strcpy(card->driver, DRIVER_NAME); 364 365 strcpy(card->shortname, "CS5535 Audio"); 366 sprintf(card->longname, "%s %s at 0x%lx, irq %i", 367 card->shortname, card->driver, 368 cs5535au->port, cs5535au->irq); 369 370 if ((err = snd_card_register(card)) < 0) 371 goto probefail_out; 372 373 pci_set_drvdata(pci, card); 374 dev++; 375 return 0; 376 377probefail_out: 378 snd_card_free(card); 379 return err; 380} 381 382static void __devexit snd_cs5535audio_remove(struct pci_dev *pci) 383{ 384 olpc_quirks_cleanup(); 385 snd_card_free(pci_get_drvdata(pci)); 386 pci_set_drvdata(pci, NULL); 387} 388 389static struct pci_driver driver = { 390 .name = DRIVER_NAME, 391 .id_table = snd_cs5535audio_ids, 392 .probe = snd_cs5535audio_probe, 393 .remove = __devexit_p(snd_cs5535audio_remove), 394#ifdef CONFIG_PM 395 .suspend = snd_cs5535audio_suspend, 396 .resume = snd_cs5535audio_resume, 397#endif 398}; 399 400static int __init alsa_card_cs5535audio_init(void) 401{ 402 return pci_register_driver(&driver); 403} 404 405static void __exit alsa_card_cs5535audio_exit(void) 406{ 407 pci_unregister_driver(&driver); 408} 409 410module_init(alsa_card_cs5535audio_init) 411module_exit(alsa_card_cs5535audio_exit) 412 413MODULE_AUTHOR("Jaya Kumar"); 414MODULE_LICENSE("GPL"); 415MODULE_DESCRIPTION("CS5535 Audio"); 416MODULE_SUPPORTED_DEVICE("CS5535 Audio"); 417