diff options
Diffstat (limited to 'sound/pci/cs5535audio/cs5535audio.c')
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio.c | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c new file mode 100644 index 000000000..11ce3c458 --- /dev/null +++ b/sound/pci/cs5535audio/cs5535audio.c @@ -0,0 +1,397 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for audio on multifunction CS5535/6 companion device + * Copyright (C) Jaya Kumar + * + * Based on Jaroslav Kysela and Takashi Iwai's examples. + * This work was sponsored by CIS(M) Sdn Bhd. + */ + +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/io.h> +#include <sound/core.h> +#include <sound/control.h> +#include <sound/pcm.h> +#include <sound/rawmidi.h> +#include <sound/ac97_codec.h> +#include <sound/initval.h> +#include <sound/asoundef.h> +#include "cs5535audio.h" + +#define DRIVER_NAME "cs5535audio" + +static char *ac97_quirk; +module_param(ac97_quirk, charp, 0444); +MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds."); + +static const struct ac97_quirk ac97_quirks[] = { +#if 0 /* Not yet confirmed if all 5536 boards are HP only */ + { + .subvendor = PCI_VENDOR_ID_AMD, + .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO, + .name = "AMD RDK", + .type = AC97_TUNE_HP_ONLY + }, +#endif + {} +}; + +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; +static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; + +module_param_array(index, int, NULL, 0444); +MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME); +module_param_array(id, charp, NULL, 0444); +MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME); +module_param_array(enable, bool, NULL, 0444); +MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME); + +static const struct pci_device_id snd_cs5535audio_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) }, + { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) }, + {} +}; + +MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids); + +static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout) +{ + unsigned int tmp; + do { + tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); + if (!(tmp & CMD_NEW)) + break; + udelay(1); + } while (--timeout); + if (!timeout) + dev_err(cs5535au->card->dev, + "Failure writing to cs5535 codec\n"); +} + +static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, + unsigned short reg) +{ + unsigned int regdata; + unsigned int timeout; + unsigned int val; + + regdata = ((unsigned int) reg) << 24; + regdata |= ACC_CODEC_CNTL_RD_CMD; + regdata |= CMD_NEW; + + cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); + wait_till_cmd_acked(cs5535au, 50); + + timeout = 50; + do { + val = cs_readl(cs5535au, ACC_CODEC_STATUS); + if ((val & STS_NEW) && reg == (val >> 24)) + break; + udelay(1); + } while (--timeout); + if (!timeout) + dev_err(cs5535au->card->dev, + "Failure reading codec reg 0x%x, Last value=0x%x\n", + reg, val); + + return (unsigned short) val; +} + +static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au, + unsigned short reg, unsigned short val) +{ + unsigned int regdata; + + regdata = ((unsigned int) reg) << 24; + regdata |= val; + regdata &= CMD_MASK; + regdata |= CMD_NEW; + regdata &= ACC_CODEC_CNTL_WR_CMD; + + cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); + wait_till_cmd_acked(cs5535au, 50); +} + +static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97, + unsigned short reg, unsigned short val) +{ + struct cs5535audio *cs5535au = ac97->private_data; + snd_cs5535audio_codec_write(cs5535au, reg, val); +} + +static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97, + unsigned short reg) +{ + struct cs5535audio *cs5535au = ac97->private_data; + return snd_cs5535audio_codec_read(cs5535au, reg); +} + +static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au) +{ + struct snd_card *card = cs5535au->card; + struct snd_ac97_bus *pbus; + struct snd_ac97_template ac97; + int err; + static const struct snd_ac97_bus_ops ops = { + .write = snd_cs5535audio_ac97_codec_write, + .read = snd_cs5535audio_ac97_codec_read, + }; + + if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0) + return err; + + memset(&ac97, 0, sizeof(ac97)); + ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM + | AC97_SCAP_POWER_SAVE; + ac97.private_data = cs5535au; + ac97.pci = cs5535au->pci; + + /* set any OLPC-specific scaps */ + olpc_prequirks(card, &ac97); + + if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { + dev_err(card->dev, "mixer failed\n"); + return err; + } + + snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); + + err = olpc_quirks(card, cs5535au->ac97); + if (err < 0) { + dev_err(card->dev, "olpc quirks failed\n"); + return err; + } + + return 0; +} + +static void process_bm0_irq(struct cs5535audio *cs5535au) +{ + u8 bm_stat; + spin_lock(&cs5535au->reg_lock); + bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS); + spin_unlock(&cs5535au->reg_lock); + if (bm_stat & EOP) { + snd_pcm_period_elapsed(cs5535au->playback_substream); + } else { + dev_err(cs5535au->card->dev, + "unexpected bm0 irq src, bm_stat=%x\n", + bm_stat); + } +} + +static void process_bm1_irq(struct cs5535audio *cs5535au) +{ + u8 bm_stat; + spin_lock(&cs5535au->reg_lock); + bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS); + spin_unlock(&cs5535au->reg_lock); + if (bm_stat & EOP) + snd_pcm_period_elapsed(cs5535au->capture_substream); +} + +static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id) +{ + u16 acc_irq_stat; + unsigned char count; + struct cs5535audio *cs5535au = dev_id; + + if (cs5535au == NULL) + return IRQ_NONE; + + acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS); + + if (!acc_irq_stat) + return IRQ_NONE; + for (count = 0; count < 4; count++) { + if (acc_irq_stat & (1 << count)) { + switch (count) { + case IRQ_STS: + cs_readl(cs5535au, ACC_GPIO_STATUS); + break; + case WU_IRQ_STS: + cs_readl(cs5535au, ACC_GPIO_STATUS); + break; + case BM0_IRQ_STS: + process_bm0_irq(cs5535au); + break; + case BM1_IRQ_STS: + process_bm1_irq(cs5535au); + break; + default: + dev_err(cs5535au->card->dev, + "Unexpected irq src: 0x%x\n", + acc_irq_stat); + break; + } + } + } + return IRQ_HANDLED; +} + +static int snd_cs5535audio_free(struct cs5535audio *cs5535au) +{ + pci_set_power_state(cs5535au->pci, PCI_D3hot); + + if (cs5535au->irq >= 0) + free_irq(cs5535au->irq, cs5535au); + + pci_release_regions(cs5535au->pci); + pci_disable_device(cs5535au->pci); + kfree(cs5535au); + return 0; +} + +static int snd_cs5535audio_dev_free(struct snd_device *device) +{ + struct cs5535audio *cs5535au = device->device_data; + return snd_cs5535audio_free(cs5535au); +} + +static int snd_cs5535audio_create(struct snd_card *card, + struct pci_dev *pci, + struct cs5535audio **rcs5535au) +{ + struct cs5535audio *cs5535au; + + int err; + static const struct snd_device_ops ops = { + .dev_free = snd_cs5535audio_dev_free, + }; + + *rcs5535au = NULL; + if ((err = pci_enable_device(pci)) < 0) + return err; + + if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 || + dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) { + dev_warn(card->dev, "unable to get 32bit dma\n"); + err = -ENXIO; + goto pcifail; + } + + cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL); + if (cs5535au == NULL) { + err = -ENOMEM; + goto pcifail; + } + + spin_lock_init(&cs5535au->reg_lock); + cs5535au->card = card; + cs5535au->pci = pci; + cs5535au->irq = -1; + + if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) { + kfree(cs5535au); + goto pcifail; + } + + cs5535au->port = pci_resource_start(pci, 0); + + if (request_irq(pci->irq, snd_cs5535audio_interrupt, + IRQF_SHARED, KBUILD_MODNAME, cs5535au)) { + dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); + err = -EBUSY; + goto sndfail; + } + + cs5535au->irq = pci->irq; + card->sync_irq = cs5535au->irq; + pci_set_master(pci); + + if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, + cs5535au, &ops)) < 0) + goto sndfail; + + *rcs5535au = cs5535au; + return 0; + +sndfail: /* leave the device alive, just kill the snd */ + snd_cs5535audio_free(cs5535au); + return err; + +pcifail: + pci_disable_device(pci); + return err; +} + +static int snd_cs5535audio_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + static int dev; + struct snd_card *card; + struct cs5535audio *cs5535au; + int err; + + if (dev >= SNDRV_CARDS) + return -ENODEV; + if (!enable[dev]) { + dev++; + return -ENOENT; + } + + err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE, + 0, &card); + if (err < 0) + return err; + + if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) + goto probefail_out; + + card->private_data = cs5535au; + + if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) + goto probefail_out; + + if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) + goto probefail_out; + + strcpy(card->driver, DRIVER_NAME); + + strcpy(card->shortname, "CS5535 Audio"); + sprintf(card->longname, "%s %s at 0x%lx, irq %i", + card->shortname, card->driver, + cs5535au->port, cs5535au->irq); + + if ((err = snd_card_register(card)) < 0) + goto probefail_out; + + pci_set_drvdata(pci, card); + dev++; + return 0; + +probefail_out: + snd_card_free(card); + return err; +} + +static void snd_cs5535audio_remove(struct pci_dev *pci) +{ + olpc_quirks_cleanup(); + snd_card_free(pci_get_drvdata(pci)); +} + +static struct pci_driver cs5535audio_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_cs5535audio_ids, + .probe = snd_cs5535audio_probe, + .remove = snd_cs5535audio_remove, +#ifdef CONFIG_PM_SLEEP + .driver = { + .pm = &snd_cs5535audio_pm, + }, +#endif +}; + +module_pci_driver(cs5535audio_driver); + +MODULE_AUTHOR("Jaya Kumar"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("CS5535 Audio"); +MODULE_SUPPORTED_DEVICE("CS5535 Audio"); |