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403 lines
9.1 KiB
403 lines
9.1 KiB
// 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 int snd_cs5535audio_free(struct cs5535audio *cs5535au) |
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{ |
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pci_set_power_state(cs5535au->pci, PCI_D3hot); |
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if (cs5535au->irq >= 0) |
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free_irq(cs5535au->irq, cs5535au); |
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pci_release_regions(cs5535au->pci); |
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pci_disable_device(cs5535au->pci); |
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kfree(cs5535au); |
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return 0; |
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} |
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static int snd_cs5535audio_dev_free(struct snd_device *device) |
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{ |
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struct cs5535audio *cs5535au = device->device_data; |
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return snd_cs5535audio_free(cs5535au); |
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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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struct cs5535audio **rcs5535au) |
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{ |
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struct cs5535audio *cs5535au; |
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int err; |
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static const struct snd_device_ops ops = { |
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.dev_free = snd_cs5535audio_dev_free, |
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}; |
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*rcs5535au = NULL; |
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err = pci_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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err = -ENXIO; |
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goto pcifail; |
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} |
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cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); |
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if (cs5535au == NULL) { |
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err = -ENOMEM; |
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goto pcifail; |
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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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kfree(cs5535au); |
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goto pcifail; |
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} |
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cs5535au->port = pci_resource_start(pci, 0); |
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if (request_irq(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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err = -EBUSY; |
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goto sndfail; |
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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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err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, cs5535au, &ops); |
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if (err < 0) |
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goto sndfail; |
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*rcs5535au = cs5535au; |
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return 0; |
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sndfail: /* leave the device alive, just kill the snd */ |
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snd_cs5535audio_free(cs5535au); |
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return err; |
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pcifail: |
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pci_disable_device(pci); |
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return err; |
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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_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE, |
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0, &card); |
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if (err < 0) |
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return err; |
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err = snd_cs5535audio_create(card, pci, &cs5535au); |
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if (err < 0) |
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goto probefail_out; |
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card->private_data = cs5535au; |
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err = snd_cs5535audio_mixer(cs5535au); |
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if (err < 0) |
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goto probefail_out; |
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err = snd_cs5535audio_pcm(cs5535au); |
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if (err < 0) |
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goto probefail_out; |
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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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goto probefail_out; |
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pci_set_drvdata(pci, card); |
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dev++; |
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return 0; |
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probefail_out: |
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snd_card_free(card); |
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return err; |
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} |
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static void snd_cs5535audio_remove(struct pci_dev *pci) |
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{ |
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olpc_quirks_cleanup(); |
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snd_card_free(pci_get_drvdata(pci)); |
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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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.remove = snd_cs5535audio_remove, |
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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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