cs5535audio.c 10 KB

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  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. #include <linux/delay.h>
  24. #include <linux/interrupt.h>
  25. #include <linux/init.h>
  26. #include <linux/pci.h>
  27. #include <linux/slab.h>
  28. #include <linux/moduleparam.h>
  29. #include <asm/io.h>
  30. #include <sound/core.h>
  31. #include <sound/control.h>
  32. #include <sound/pcm.h>
  33. #include <sound/rawmidi.h>
  34. #include <sound/ac97_codec.h>
  35. #include <sound/initval.h>
  36. #include <sound/asoundef.h>
  37. #include "cs5535audio.h"
  38. #define DRIVER_NAME "cs5535audio"
  39. static char *ac97_quirk;
  40. module_param(ac97_quirk, charp, 0444);
  41. MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
  42. static struct ac97_quirk ac97_quirks[] __devinitdata = {
  43. #if 0 /* Not yet confirmed if all 5536 boards are HP only */
  44. {
  45. .subvendor = PCI_VENDOR_ID_AMD,
  46. .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
  47. .name = "AMD RDK",
  48. .type = AC97_TUNE_HP_ONLY
  49. },
  50. #endif
  51. {}
  52. };
  53. static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  54. static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  55. static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  56. module_param_array(index, int, NULL, 0444);
  57. MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
  58. module_param_array(id, charp, NULL, 0444);
  59. MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
  60. module_param_array(enable, bool, NULL, 0444);
  61. MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
  62. static struct pci_device_id snd_cs5535audio_ids[] = {
  63. { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
  64. { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
  65. {}
  66. };
  67. MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
  68. static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
  69. {
  70. unsigned int tmp;
  71. do {
  72. tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
  73. if (!(tmp & CMD_NEW))
  74. break;
  75. udelay(1);
  76. } while (--timeout);
  77. if (!timeout)
  78. snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
  79. }
  80. static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
  81. unsigned short reg)
  82. {
  83. unsigned int regdata;
  84. unsigned int timeout;
  85. unsigned int val;
  86. regdata = ((unsigned int) reg) << 24;
  87. regdata |= ACC_CODEC_CNTL_RD_CMD;
  88. regdata |= CMD_NEW;
  89. cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
  90. wait_till_cmd_acked(cs5535au, 50);
  91. timeout = 50;
  92. do {
  93. val = cs_readl(cs5535au, ACC_CODEC_STATUS);
  94. if ((val & STS_NEW) && reg == (val >> 24))
  95. break;
  96. udelay(1);
  97. } while (--timeout);
  98. if (!timeout)
  99. snd_printk(KERN_ERR "Failure reading codec reg 0x%x,"
  100. "Last value=0x%x\n", reg, val);
  101. return (unsigned short) val;
  102. }
  103. static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
  104. unsigned short reg, unsigned short val)
  105. {
  106. unsigned int regdata;
  107. regdata = ((unsigned int) reg) << 24;
  108. regdata |= val;
  109. regdata &= CMD_MASK;
  110. regdata |= CMD_NEW;
  111. regdata &= ACC_CODEC_CNTL_WR_CMD;
  112. cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
  113. wait_till_cmd_acked(cs5535au, 50);
  114. }
  115. static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
  116. unsigned short reg, unsigned short val)
  117. {
  118. struct cs5535audio *cs5535au = ac97->private_data;
  119. snd_cs5535audio_codec_write(cs5535au, reg, val);
  120. }
  121. static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
  122. unsigned short reg)
  123. {
  124. struct cs5535audio *cs5535au = ac97->private_data;
  125. return snd_cs5535audio_codec_read(cs5535au, reg);
  126. }
  127. static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
  128. {
  129. struct snd_card *card = cs5535au->card;
  130. struct snd_ac97_bus *pbus;
  131. struct snd_ac97_template ac97;
  132. int err;
  133. static struct snd_ac97_bus_ops ops = {
  134. .write = snd_cs5535audio_ac97_codec_write,
  135. .read = snd_cs5535audio_ac97_codec_read,
  136. };
  137. if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
  138. return err;
  139. memset(&ac97, 0, sizeof(ac97));
  140. ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
  141. | AC97_SCAP_POWER_SAVE;
  142. ac97.private_data = cs5535au;
  143. ac97.pci = cs5535au->pci;
  144. /* set any OLPC-specific scaps */
  145. olpc_prequirks(card, &ac97);
  146. if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
  147. snd_printk(KERN_ERR "mixer failed\n");
  148. return err;
  149. }
  150. snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
  151. err = olpc_quirks(card, cs5535au->ac97);
  152. if (err < 0) {
  153. snd_printk(KERN_ERR "olpc quirks failed\n");
  154. return err;
  155. }
  156. return 0;
  157. }
  158. static void process_bm0_irq(struct cs5535audio *cs5535au)
  159. {
  160. u8 bm_stat;
  161. spin_lock(&cs5535au->reg_lock);
  162. bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
  163. spin_unlock(&cs5535au->reg_lock);
  164. if (bm_stat & EOP) {
  165. struct cs5535audio_dma *dma;
  166. dma = cs5535au->playback_substream->runtime->private_data;
  167. snd_pcm_period_elapsed(cs5535au->playback_substream);
  168. } else {
  169. snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
  170. bm_stat);
  171. }
  172. }
  173. static void process_bm1_irq(struct cs5535audio *cs5535au)
  174. {
  175. u8 bm_stat;
  176. spin_lock(&cs5535au->reg_lock);
  177. bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
  178. spin_unlock(&cs5535au->reg_lock);
  179. if (bm_stat & EOP) {
  180. struct cs5535audio_dma *dma;
  181. dma = cs5535au->capture_substream->runtime->private_data;
  182. snd_pcm_period_elapsed(cs5535au->capture_substream);
  183. }
  184. }
  185. static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
  186. {
  187. u16 acc_irq_stat;
  188. unsigned char count;
  189. struct cs5535audio *cs5535au = dev_id;
  190. if (cs5535au == NULL)
  191. return IRQ_NONE;
  192. acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
  193. if (!acc_irq_stat)
  194. return IRQ_NONE;
  195. for (count = 0; count < 4; count++) {
  196. if (acc_irq_stat & (1 << count)) {
  197. switch (count) {
  198. case IRQ_STS:
  199. cs_readl(cs5535au, ACC_GPIO_STATUS);
  200. break;
  201. case WU_IRQ_STS:
  202. cs_readl(cs5535au, ACC_GPIO_STATUS);
  203. break;
  204. case BM0_IRQ_STS:
  205. process_bm0_irq(cs5535au);
  206. break;
  207. case BM1_IRQ_STS:
  208. process_bm1_irq(cs5535au);
  209. break;
  210. default:
  211. snd_printk(KERN_ERR "Unexpected irq src: "
  212. "0x%x\n", acc_irq_stat);
  213. break;
  214. }
  215. }
  216. }
  217. return IRQ_HANDLED;
  218. }
  219. static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
  220. {
  221. synchronize_irq(cs5535au->irq);
  222. pci_set_power_state(cs5535au->pci, 3);
  223. if (cs5535au->irq >= 0)
  224. free_irq(cs5535au->irq, cs5535au);
  225. pci_release_regions(cs5535au->pci);
  226. pci_disable_device(cs5535au->pci);
  227. kfree(cs5535au);
  228. return 0;
  229. }
  230. static int snd_cs5535audio_dev_free(struct snd_device *device)
  231. {
  232. struct cs5535audio *cs5535au = device->device_data;
  233. return snd_cs5535audio_free(cs5535au);
  234. }
  235. static int __devinit snd_cs5535audio_create(struct snd_card *card,
  236. struct pci_dev *pci,
  237. struct cs5535audio **rcs5535au)
  238. {
  239. struct cs5535audio *cs5535au;
  240. int err;
  241. static struct snd_device_ops ops = {
  242. .dev_free = snd_cs5535audio_dev_free,
  243. };
  244. *rcs5535au = NULL;
  245. if ((err = pci_enable_device(pci)) < 0)
  246. return err;
  247. if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0 ||
  248. pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0) {
  249. printk(KERN_WARNING "unable to get 32bit dma\n");
  250. err = -ENXIO;
  251. goto pcifail;
  252. }
  253. cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
  254. if (cs5535au == NULL) {
  255. err = -ENOMEM;
  256. goto pcifail;
  257. }
  258. spin_lock_init(&cs5535au->reg_lock);
  259. cs5535au->card = card;
  260. cs5535au->pci = pci;
  261. cs5535au->irq = -1;
  262. if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
  263. kfree(cs5535au);
  264. goto pcifail;
  265. }
  266. cs5535au->port = pci_resource_start(pci, 0);
  267. if (request_irq(pci->irq, snd_cs5535audio_interrupt,
  268. IRQF_SHARED, "CS5535 Audio", cs5535au)) {
  269. snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
  270. err = -EBUSY;
  271. goto sndfail;
  272. }
  273. cs5535au->irq = pci->irq;
  274. pci_set_master(pci);
  275. if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
  276. cs5535au, &ops)) < 0)
  277. goto sndfail;
  278. snd_card_set_dev(card, &pci->dev);
  279. *rcs5535au = cs5535au;
  280. return 0;
  281. sndfail: /* leave the device alive, just kill the snd */
  282. snd_cs5535audio_free(cs5535au);
  283. return err;
  284. pcifail:
  285. pci_disable_device(pci);
  286. return err;
  287. }
  288. static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
  289. const struct pci_device_id *pci_id)
  290. {
  291. static int dev;
  292. struct snd_card *card;
  293. struct cs5535audio *cs5535au;
  294. int err;
  295. if (dev >= SNDRV_CARDS)
  296. return -ENODEV;
  297. if (!enable[dev]) {
  298. dev++;
  299. return -ENOENT;
  300. }
  301. err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
  302. if (err < 0)
  303. return err;
  304. if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
  305. goto probefail_out;
  306. card->private_data = cs5535au;
  307. if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
  308. goto probefail_out;
  309. if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
  310. goto probefail_out;
  311. strcpy(card->driver, DRIVER_NAME);
  312. strcpy(card->shortname, "CS5535 Audio");
  313. sprintf(card->longname, "%s %s at 0x%lx, irq %i",
  314. card->shortname, card->driver,
  315. cs5535au->port, cs5535au->irq);
  316. if ((err = snd_card_register(card)) < 0)
  317. goto probefail_out;
  318. pci_set_drvdata(pci, card);
  319. dev++;
  320. return 0;
  321. probefail_out:
  322. snd_card_free(card);
  323. return err;
  324. }
  325. static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
  326. {
  327. snd_card_free(pci_get_drvdata(pci));
  328. pci_set_drvdata(pci, NULL);
  329. }
  330. static struct pci_driver driver = {
  331. .name = DRIVER_NAME,
  332. .id_table = snd_cs5535audio_ids,
  333. .probe = snd_cs5535audio_probe,
  334. .remove = __devexit_p(snd_cs5535audio_remove),
  335. #ifdef CONFIG_PM
  336. .suspend = snd_cs5535audio_suspend,
  337. .resume = snd_cs5535audio_resume,
  338. #endif
  339. };
  340. static int __init alsa_card_cs5535audio_init(void)
  341. {
  342. return pci_register_driver(&driver);
  343. }
  344. static void __exit alsa_card_cs5535audio_exit(void)
  345. {
  346. pci_unregister_driver(&driver);
  347. }
  348. module_init(alsa_card_cs5535audio_init)
  349. module_exit(alsa_card_cs5535audio_exit)
  350. MODULE_AUTHOR("Jaya Kumar");
  351. MODULE_LICENSE("GPL");
  352. MODULE_DESCRIPTION("CS5535 Audio");
  353. MODULE_SUPPORTED_DEVICE("CS5535 Audio");