[ALSA] add CMI8788 driver

Add the snd-oxygen driver for the C-Media CMI8788 (Oxygen) chip, used on
the Asound A-8788, AuzenTech X-Meridian, Bgears b-Enspirer,
Club3D Theatron DTS, HT-Omega Claro, Razer Barracuda AC-1,
Sondigo Inferno, and TempoTec HIFIER sound cards.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 361 insertions, 0 deletions

diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
new file mode 100644
index 0000000..6180cc8
--- /dev/null
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -0,0 +1,361 @@
+/*
+ * C-Media CMI8788 driver - main driver module
+ *
+ * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
+ *
+ *
+ *  This driver is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License, version 2.
+ *
+ *  This driver is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this driver; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <sound/ac97_codec.h>
+#include <sound/asoundef.h>
+#include <sound/core.h>
+#include <sound/info.h>
+#include <sound/mpu401.h>
+#include <sound/pcm.h>
+#include "oxygen.h"
+
+MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
+MODULE_DESCRIPTION("C-Media CMI8788 helper library");
+MODULE_LICENSE("GPL");
+
+
+static irqreturn_t oxygen_interrupt(int dummy, void *dev_id)
+{
+	struct oxygen *chip = dev_id;
+	unsigned int status, clear, elapsed_streams, i;
+
+	status = oxygen_read16(chip, OXYGEN_INTERRUPT_STATUS);
+	if (!status)
+		return IRQ_NONE;
+
+	spin_lock(&chip->reg_lock);
+
+	clear = status & (OXYGEN_CHANNEL_A |
+			  OXYGEN_CHANNEL_B |
+			  OXYGEN_CHANNEL_C |
+			  OXYGEN_CHANNEL_SPDIF |
+			  OXYGEN_CHANNEL_MULTICH |
+			  OXYGEN_CHANNEL_AC97 |
+			  OXYGEN_INT_SPDIF_IN_CHANGE |
+			  OXYGEN_INT_GPIO);
+	if (clear) {
+		if (clear & OXYGEN_INT_SPDIF_IN_CHANGE)
+			chip->interrupt_mask &= ~OXYGEN_INT_SPDIF_IN_CHANGE;
+		oxygen_write16(chip, OXYGEN_INTERRUPT_MASK,
+			       chip->interrupt_mask & ~clear);
+		oxygen_write16(chip, OXYGEN_INTERRUPT_MASK,
+			       chip->interrupt_mask);
+	}
+
+	elapsed_streams = status & chip->pcm_running;
+
+	spin_unlock(&chip->reg_lock);
+
+	for (i = 0; i < PCM_COUNT; ++i)
+		if ((elapsed_streams & (1 << i)) && chip->streams[i])
+			snd_pcm_period_elapsed(chip->streams[i]);
+
+	if (status & OXYGEN_INT_SPDIF_IN_CHANGE) {
+		spin_lock(&chip->reg_lock);
+		i = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
+		if (i & OXYGEN_SPDIF_IN_CHANGE) {
+			oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, i);
+			schedule_work(&chip->spdif_input_bits_work);
+		}
+		spin_unlock(&chip->reg_lock);
+	}
+
+	if (status & OXYGEN_INT_GPIO)
+		;
+
+	if ((status & OXYGEN_INT_MIDI) && chip->midi)
+		snd_mpu401_uart_interrupt(0, chip->midi->private_data);
+
+	return IRQ_HANDLED;
+}
+
+static void oxygen_spdif_input_bits_changed(struct work_struct *work)
+{
+	struct oxygen *chip = container_of(work, struct oxygen,
+					   spdif_input_bits_work);
+
+	spin_lock_irq(&chip->reg_lock);
+	oxygen_clear_bits32(chip, OXYGEN_SPDIF_CONTROL, OXYGEN_SPDIF_IN_INVERT);
+	spin_unlock_irq(&chip->reg_lock);
+	msleep(1);
+	if (!(oxygen_read32(chip, OXYGEN_SPDIF_CONTROL)
+	      & OXYGEN_SPDIF_IN_VALID)) {
+		spin_lock_irq(&chip->reg_lock);
+		oxygen_set_bits32(chip, OXYGEN_SPDIF_CONTROL,
+				  OXYGEN_SPDIF_IN_INVERT);
+		spin_unlock_irq(&chip->reg_lock);
+		msleep(1);
+		if (!(oxygen_read32(chip, OXYGEN_SPDIF_CONTROL)
+		      & OXYGEN_SPDIF_IN_VALID)) {
+			spin_lock_irq(&chip->reg_lock);
+			oxygen_clear_bits32(chip, OXYGEN_SPDIF_CONTROL,
+					    OXYGEN_SPDIF_IN_INVERT);
+			spin_unlock_irq(&chip->reg_lock);
+		}
+	}
+
+	if (chip->spdif_input_bits_ctl) {
+		spin_lock_irq(&chip->reg_lock);
+		chip->interrupt_mask |= OXYGEN_INT_SPDIF_IN_CHANGE;
+		oxygen_write16(chip, OXYGEN_INTERRUPT_MASK,
+			       chip->interrupt_mask);
+		spin_unlock_irq(&chip->reg_lock);
+
+		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+			       &chip->spdif_input_bits_ctl->id);
+	}
+}
+
+#ifdef CONFIG_PROC_FS
+static void oxygen_proc_read(struct snd_info_entry *entry,
+			     struct snd_info_buffer *buffer)
+{
+	struct oxygen *chip = entry->private_data;
+	int i, j;
+
+	snd_iprintf(buffer, "CMI8788\n\n");
+	for (i = 0; i < 0x100; i += 0x10) {
+		snd_iprintf(buffer, "%02x:", i);
+		for (j = 0; j < 0x10; ++j)
+			snd_iprintf(buffer, " %02x", oxygen_read8(chip, i + j));
+		snd_iprintf(buffer, "\n");
+	}
+	if (mutex_lock_interruptible(&chip->mutex) < 0)
+		return;
+	snd_iprintf(buffer, "\nAC97\n");
+	for (i = 0; i < 0x80; i += 0x10) {
+		snd_iprintf(buffer, "%02x:", i);
+		for (j = 0; j < 0x10; j += 2)
+			snd_iprintf(buffer, " %04x",
+				    oxygen_read_ac97(chip, 0, i + j));
+		snd_iprintf(buffer, "\n");
+	}
+	mutex_unlock(&chip->mutex);
+}
+
+static void __devinit oxygen_proc_init(struct oxygen *chip)
+{
+	struct snd_info_entry *entry;
+
+	if (!snd_card_proc_new(chip->card, "cmi8788", &entry))
+		snd_info_set_text_ops(entry, chip, oxygen_proc_read);
+}
+#else
+#define oxygen_proc_init(chip)
+#endif
+
+static void __devinit oxygen_init(struct oxygen *chip)
+{
+	unsigned int i;
+
+	chip->dac_routing = 1;
+	for (i = 0; i < 8; ++i)
+		chip->dac_volume[i] = 0xff;
+	chip->spdif_playback_enable = 1;
+	chip->spdif_bits = OXYGEN_SPDIF_C | OXYGEN_SPDIF_ORIGINAL |
+		(IEC958_AES1_CON_PCM_CODER << OXYGEN_SPDIF_CATEGORY_SHIFT);
+	chip->spdif_pcm_bits = chip->spdif_bits;
+
+	if (oxygen_read8(chip, OXYGEN_REVISION) & OXYGEN_REVISION_2)
+		chip->revision = 2;
+	else
+		chip->revision = 1;
+
+	if (chip->revision == 1)
+		oxygen_set_bits8(chip, OXYGEN_MISC, OXYGEN_MISC_MAGIC);
+
+	oxygen_set_bits8(chip, OXYGEN_FUNCTION,
+			 OXYGEN_FUNCTION_RESET_CODEC |
+			 OXYGEN_FUNCTION_ENABLE_SPI_4_5);
+	oxygen_write16(chip, OXYGEN_I2S_MULTICH_FORMAT, 0x010a);
+	oxygen_write16(chip, OXYGEN_I2S_A_FORMAT, 0x010a);
+	oxygen_write16(chip, OXYGEN_I2S_B_FORMAT, 0x010a);
+	oxygen_write16(chip, OXYGEN_I2S_C_FORMAT, 0x010a);
+	oxygen_set_bits32(chip, OXYGEN_SPDIF_CONTROL, OXYGEN_SPDIF_MAGIC2);
+	oxygen_write32(chip, OXYGEN_SPDIF_OUTPUT_BITS, chip->spdif_bits);
+	oxygen_write16(chip, OXYGEN_PLAY_ROUTING, 0x6c00);
+	oxygen_write8(chip, OXYGEN_REC_ROUTING, 0x10);
+	oxygen_write8(chip, OXYGEN_ADC_MONITOR, 0x00);
+	oxygen_write8(chip, OXYGEN_A_MONITOR_ROUTING, 0xe4);
+
+	oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
+	oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
+
+	oxygen_write8(chip, OXYGEN_AC97_INTERRUPT_MASK, 0x00);
+	oxygen_clear_bits16(chip, OXYGEN_AC97_OUT_CONFIG,
+			    OXYGEN_AC97_OUT_MAGIC3);
+	oxygen_set_bits16(chip, OXYGEN_AC97_IN_CONFIG,
+			  OXYGEN_AC97_IN_MAGIC3);
+	oxygen_write_ac97(chip, 0, AC97_RESET, 0);
+	msleep(1);
+	oxygen_ac97_set_bits(chip, 0, 0x70, 0x0300);
+	oxygen_ac97_set_bits(chip, 0, 0x64, 0x8043);
+	oxygen_ac97_set_bits(chip, 0, 0x62, 0x180f);
+	oxygen_write_ac97(chip, 0, AC97_MASTER, 0x0000);
+	oxygen_write_ac97(chip, 0, AC97_PC_BEEP, 0x8000);
+	oxygen_write_ac97(chip, 0, AC97_MIC, 0x8808);
+	oxygen_write_ac97(chip, 0, AC97_LINE, 0x0808);
+	oxygen_write_ac97(chip, 0, AC97_CD, 0x8808);
+	oxygen_write_ac97(chip, 0, AC97_VIDEO, 0x8808);
+	oxygen_write_ac97(chip, 0, AC97_AUX, 0x8808);
+	oxygen_write_ac97(chip, 0, AC97_REC_GAIN, 0x8000);
+	oxygen_write_ac97(chip, 0, AC97_CENTER_LFE_MASTER, 0x8080);
+	oxygen_write_ac97(chip, 0, AC97_SURROUND_MASTER, 0x8080);
+	oxygen_ac97_clear_bits(chip, 0, 0x72, 0x0001);
+	/* power down unused ADCs and DACs */
+	oxygen_ac97_set_bits(chip, 0, AC97_POWERDOWN,
+			     AC97_PD_PR0 | AC97_PD_PR1);
+	oxygen_ac97_set_bits(chip, 0, AC97_EXTENDED_STATUS,
+			     AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK);
+}
+
+static void oxygen_card_free(struct snd_card *card)
+{
+	struct oxygen *chip = card->private_data;
+
+	spin_lock_irq(&chip->reg_lock);
+	chip->interrupt_mask = 0;
+	chip->pcm_running = 0;
+	oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
+	oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
+	spin_unlock_irq(&chip->reg_lock);
+	if (chip->irq >= 0) {
+		free_irq(chip->irq, chip);
+		synchronize_irq(chip->irq);
+	}
+	flush_scheduled_work();
+	chip->model->cleanup(chip);
+	mutex_destroy(&chip->mutex);
+	pci_release_regions(chip->pci);
+	pci_disable_device(chip->pci);
+}
+
+int __devinit oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
+			       const struct oxygen_model *model)
+{
+	struct snd_card *card;
+	struct oxygen *chip;
+	int err;
+
+	card = snd_card_new(index, id, model->owner, sizeof *chip);
+	if (!card)
+		return -ENOMEM;
+
+	chip = card->private_data;
+	chip->card = card;
+	chip->pci = pci;
+	chip->irq = -1;
+	chip->model = model;
+	spin_lock_init(&chip->reg_lock);
+	mutex_init(&chip->mutex);
+	INIT_WORK(&chip->spdif_input_bits_work,
+		  oxygen_spdif_input_bits_changed);
+
+	err = pci_enable_device(pci);
+	if (err < 0)
+		goto err_card;
+
+	err = pci_request_regions(pci, model->chip);
+	if (err < 0) {
+		snd_printk(KERN_ERR "cannot reserve PCI resources\n");
+		goto err_pci_enable;
+	}
+
+	if (!(pci_resource_flags(pci, 0) & IORESOURCE_IO) ||
+	    pci_resource_len(pci, 0) < 0x100) {
+		snd_printk(KERN_ERR "invalid PCI I/O range\n");
+		err = -ENXIO;
+		goto err_pci_regions;
+	}
+	chip->addr = pci_resource_start(pci, 0);
+
+	pci_set_master(pci);
+	snd_card_set_dev(card, &pci->dev);
+	card->private_free = oxygen_card_free;
+
+	oxygen_init(chip);
+	model->init(chip);
+
+	err = request_irq(pci->irq, oxygen_interrupt, IRQF_SHARED,
+			  model->chip, chip);
+	if (err < 0) {
+		snd_printk(KERN_ERR "cannot grab interrupt %d\n", pci->irq);
+		goto err_card;
+	}
+	chip->irq = pci->irq;
+
+	strcpy(card->driver, model->chip);
+	strcpy(card->shortname, model->shortname);
+	sprintf(card->longname, "%s (rev %u) at %#lx, irq %i",
+		model->longname, chip->revision, chip->addr, chip->irq);
+	strcpy(card->mixername, model->chip);
+	snd_component_add(card, model->chip);
+
+	err = oxygen_pcm_init(chip);
+	if (err < 0)
+		goto err_card;
+
+	err = oxygen_mixer_init(chip);
+	if (err < 0)
+		goto err_card;
+
+	if (oxygen_read8(chip, OXYGEN_MISC) & OXYGEN_MISC_MIDI) {
+		err = snd_mpu401_uart_new(card, 0, MPU401_HW_CMIPCI,
+					  chip->addr + OXYGEN_MPU401,
+					  MPU401_INFO_INTEGRATED, 0, 0,
+					  &chip->midi);
+		if (err < 0)
+			goto err_card;
+	}
+
+	oxygen_proc_init(chip);
+
+	spin_lock_irq(&chip->reg_lock);
+	chip->interrupt_mask |= OXYGEN_INT_SPDIF_IN_CHANGE;
+	oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, chip->interrupt_mask);
+	spin_unlock_irq(&chip->reg_lock);
+
+	err = snd_card_register(card);
+	if (err < 0)
+		goto err_card;
+
+	pci_set_drvdata(pci, card);
+	return 0;
+
+err_pci_regions:
+	pci_release_regions(pci);
+err_pci_enable:
+	pci_disable_device(pci);
+err_card:
+	snd_card_free(card);
+	return err;
+}
+EXPORT_SYMBOL(oxygen_pci_probe);
+
+void __devexit oxygen_pci_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+EXPORT_SYMBOL(oxygen_pci_remove);