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-rw-r--r--sound/pci/cs5535audio/cs5535audio.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c
new file mode 100644
index 000000000..440b8f9b4
--- /dev/null
+++ b/sound/pci/cs5535audio/cs5535audio.c
@@ -0,0 +1,355 @@
+// 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,
+ };
+
+ err = snd_ac97_bus(card, 0, &ops, NULL, &pbus);
+ if (err < 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);
+
+ err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97);
+ if (err < 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 void snd_cs5535audio_free(struct snd_card *card)
+{
+ olpc_quirks_cleanup();
+}
+
+static int snd_cs5535audio_create(struct snd_card *card,
+ struct pci_dev *pci)
+{
+ struct cs5535audio *cs5535au = card->private_data;
+ int err;
+
+ err = pcim_enable_device(pci);
+ if (err < 0)
+ return err;
+
+ if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
+ dev_warn(card->dev, "unable to get 32bit dma\n");
+ return -ENXIO;
+ }
+
+ spin_lock_init(&cs5535au->reg_lock);
+ cs5535au->card = card;
+ cs5535au->pci = pci;
+ cs5535au->irq = -1;
+
+ err = pci_request_regions(pci, "CS5535 Audio");
+ if (err < 0)
+ return err;
+
+ cs5535au->port = pci_resource_start(pci, 0);
+
+ if (devm_request_irq(&pci->dev, pci->irq, snd_cs5535audio_interrupt,
+ IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
+ dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
+ return -EBUSY;
+ }
+
+ cs5535au->irq = pci->irq;
+ card->sync_irq = cs5535au->irq;
+ pci_set_master(pci);
+
+ return 0;
+}
+
+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_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ sizeof(*cs5535au), &card);
+ if (err < 0)
+ return err;
+ cs5535au = card->private_data;
+ card->private_free = snd_cs5535audio_free;
+
+ err = snd_cs5535audio_create(card, pci);
+ if (err < 0)
+ return err;
+
+ err = snd_cs5535audio_mixer(cs5535au);
+ if (err < 0)
+ return err;
+
+ err = snd_cs5535audio_pcm(cs5535au);
+ if (err < 0)
+ return err;
+
+ 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);
+
+ err = snd_card_register(card);
+ if (err < 0)
+ return err;
+
+ pci_set_drvdata(pci, card);
+ dev++;
+ return 0;
+}
+
+static int snd_cs5535audio_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ return snd_card_free_on_error(&pci->dev, __snd_cs5535audio_probe(pci, pci_id));
+}
+
+static struct pci_driver cs5535audio_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_cs5535audio_ids,
+ .probe = snd_cs5535audio_probe,
+#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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 01:06:03 +0000