356 lines
8.2 KiB
C
356 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for audio on multifunction CS5535/6 companion device
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* Copyright (C) Jaya Kumar
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*
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* Based on Jaroslav Kysela and Takashi Iwai's examples.
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* This work was sponsored by CIS(M) Sdn Bhd.
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*/
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/pcm.h>
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#include <sound/rawmidi.h>
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#include <sound/ac97_codec.h>
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#include <sound/initval.h>
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#include <sound/asoundef.h>
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#include "cs5535audio.h"
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#define DRIVER_NAME "cs5535audio"
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static char *ac97_quirk;
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module_param(ac97_quirk, charp, 0444);
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MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
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static const struct ac97_quirk ac97_quirks[] = {
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#if 0 /* Not yet confirmed if all 5536 boards are HP only */
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{
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.subvendor = PCI_VENDOR_ID_AMD,
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.subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
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.name = "AMD RDK",
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.type = AC97_TUNE_HP_ONLY
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},
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#endif
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{}
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};
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
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static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
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module_param_array(id, charp, NULL, 0444);
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MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
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static const struct pci_device_id snd_cs5535audio_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
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{}
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};
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MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
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static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
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{
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unsigned int tmp;
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do {
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tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
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if (!(tmp & CMD_NEW))
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break;
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udelay(1);
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} while (--timeout);
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if (!timeout)
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dev_err(cs5535au->card->dev,
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"Failure writing to cs5535 codec\n");
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}
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static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
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unsigned short reg)
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{
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unsigned int regdata;
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unsigned int timeout;
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unsigned int val;
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regdata = ((unsigned int) reg) << 24;
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regdata |= ACC_CODEC_CNTL_RD_CMD;
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regdata |= CMD_NEW;
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cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
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wait_till_cmd_acked(cs5535au, 50);
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timeout = 50;
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do {
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val = cs_readl(cs5535au, ACC_CODEC_STATUS);
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if ((val & STS_NEW) && reg == (val >> 24))
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break;
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udelay(1);
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} while (--timeout);
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if (!timeout)
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dev_err(cs5535au->card->dev,
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"Failure reading codec reg 0x%x, Last value=0x%x\n",
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reg, val);
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return (unsigned short) val;
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}
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static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
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unsigned short reg, unsigned short val)
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{
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unsigned int regdata;
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regdata = ((unsigned int) reg) << 24;
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regdata |= val;
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regdata &= CMD_MASK;
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regdata |= CMD_NEW;
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regdata &= ACC_CODEC_CNTL_WR_CMD;
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cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
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wait_till_cmd_acked(cs5535au, 50);
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}
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static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
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unsigned short reg, unsigned short val)
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{
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struct cs5535audio *cs5535au = ac97->private_data;
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snd_cs5535audio_codec_write(cs5535au, reg, val);
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}
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static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
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unsigned short reg)
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{
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struct cs5535audio *cs5535au = ac97->private_data;
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return snd_cs5535audio_codec_read(cs5535au, reg);
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}
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static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
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{
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struct snd_card *card = cs5535au->card;
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struct snd_ac97_bus *pbus;
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struct snd_ac97_template ac97;
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int err;
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static const struct snd_ac97_bus_ops ops = {
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.write = snd_cs5535audio_ac97_codec_write,
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.read = snd_cs5535audio_ac97_codec_read,
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};
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err = snd_ac97_bus(card, 0, &ops, NULL, &pbus);
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if (err < 0)
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return err;
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memset(&ac97, 0, sizeof(ac97));
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ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
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| AC97_SCAP_POWER_SAVE;
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ac97.private_data = cs5535au;
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ac97.pci = cs5535au->pci;
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/* set any OLPC-specific scaps */
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olpc_prequirks(card, &ac97);
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err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97);
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if (err < 0) {
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dev_err(card->dev, "mixer failed\n");
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return err;
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}
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snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
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err = olpc_quirks(card, cs5535au->ac97);
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if (err < 0) {
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dev_err(card->dev, "olpc quirks failed\n");
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return err;
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}
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return 0;
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}
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static void process_bm0_irq(struct cs5535audio *cs5535au)
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{
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u8 bm_stat;
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spin_lock(&cs5535au->reg_lock);
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bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
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spin_unlock(&cs5535au->reg_lock);
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if (bm_stat & EOP) {
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snd_pcm_period_elapsed(cs5535au->playback_substream);
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} else {
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dev_err(cs5535au->card->dev,
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"unexpected bm0 irq src, bm_stat=%x\n",
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bm_stat);
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}
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}
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static void process_bm1_irq(struct cs5535audio *cs5535au)
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{
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u8 bm_stat;
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spin_lock(&cs5535au->reg_lock);
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bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
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spin_unlock(&cs5535au->reg_lock);
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if (bm_stat & EOP)
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snd_pcm_period_elapsed(cs5535au->capture_substream);
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}
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static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
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{
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u16 acc_irq_stat;
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unsigned char count;
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struct cs5535audio *cs5535au = dev_id;
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if (cs5535au == NULL)
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return IRQ_NONE;
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acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
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if (!acc_irq_stat)
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return IRQ_NONE;
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for (count = 0; count < 4; count++) {
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if (acc_irq_stat & (1 << count)) {
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switch (count) {
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case IRQ_STS:
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cs_readl(cs5535au, ACC_GPIO_STATUS);
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break;
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case WU_IRQ_STS:
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cs_readl(cs5535au, ACC_GPIO_STATUS);
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break;
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case BM0_IRQ_STS:
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process_bm0_irq(cs5535au);
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break;
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case BM1_IRQ_STS:
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process_bm1_irq(cs5535au);
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break;
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default:
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dev_err(cs5535au->card->dev,
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"Unexpected irq src: 0x%x\n",
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acc_irq_stat);
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break;
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}
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}
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}
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return IRQ_HANDLED;
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}
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static void snd_cs5535audio_free(struct snd_card *card)
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{
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olpc_quirks_cleanup();
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}
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static int snd_cs5535audio_create(struct snd_card *card,
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struct pci_dev *pci)
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{
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struct cs5535audio *cs5535au = card->private_data;
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int err;
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err = pcim_enable_device(pci);
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if (err < 0)
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return err;
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if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
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dev_warn(card->dev, "unable to get 32bit dma\n");
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return -ENXIO;
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}
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spin_lock_init(&cs5535au->reg_lock);
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cs5535au->card = card;
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cs5535au->pci = pci;
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cs5535au->irq = -1;
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err = pci_request_regions(pci, "CS5535 Audio");
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if (err < 0)
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return err;
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cs5535au->port = pci_resource_start(pci, 0);
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if (devm_request_irq(&pci->dev, pci->irq, snd_cs5535audio_interrupt,
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IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
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dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
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return -EBUSY;
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}
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cs5535au->irq = pci->irq;
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card->sync_irq = cs5535au->irq;
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pci_set_master(pci);
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return 0;
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}
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static int __snd_cs5535audio_probe(struct pci_dev *pci,
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const struct pci_device_id *pci_id)
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{
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static int dev;
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struct snd_card *card;
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struct cs5535audio *cs5535au;
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int err;
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if (dev >= SNDRV_CARDS)
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return -ENODEV;
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if (!enable[dev]) {
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dev++;
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return -ENOENT;
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}
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err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
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sizeof(*cs5535au), &card);
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if (err < 0)
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return err;
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cs5535au = card->private_data;
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card->private_free = snd_cs5535audio_free;
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err = snd_cs5535audio_create(card, pci);
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if (err < 0)
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return err;
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err = snd_cs5535audio_mixer(cs5535au);
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if (err < 0)
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return err;
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err = snd_cs5535audio_pcm(cs5535au);
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if (err < 0)
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return err;
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strcpy(card->driver, DRIVER_NAME);
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strcpy(card->shortname, "CS5535 Audio");
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sprintf(card->longname, "%s %s at 0x%lx, irq %i",
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card->shortname, card->driver,
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cs5535au->port, cs5535au->irq);
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err = snd_card_register(card);
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if (err < 0)
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return err;
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pci_set_drvdata(pci, card);
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dev++;
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return 0;
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}
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static int snd_cs5535audio_probe(struct pci_dev *pci,
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const struct pci_device_id *pci_id)
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{
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return snd_card_free_on_error(&pci->dev, __snd_cs5535audio_probe(pci, pci_id));
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}
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static struct pci_driver cs5535audio_driver = {
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.name = KBUILD_MODNAME,
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.id_table = snd_cs5535audio_ids,
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.probe = snd_cs5535audio_probe,
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#ifdef CONFIG_PM_SLEEP
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.driver = {
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.pm = &snd_cs5535audio_pm,
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},
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#endif
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};
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module_pci_driver(cs5535audio_driver);
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MODULE_AUTHOR("Jaya Kumar");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("CS5535 Audio");
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