[ALSA] oxygen: add PM support
Add suspend/resume support.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 60bc159..22f3785 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -314,6 +314,10 @@
OXYGEN_SPDIF_LOCK_MASK |
OXYGEN_SPDIF_RATE_MASK);
oxygen_write32(chip, OXYGEN_SPDIF_OUTPUT_BITS, chip->spdif_bits);
+ oxygen_write16(chip, OXYGEN_2WIRE_BUS_STATUS,
+ OXYGEN_2WIRE_LENGTH_8 |
+ OXYGEN_2WIRE_INTERRUPT_MASK |
+ OXYGEN_2WIRE_SPEED_STANDARD);
oxygen_clear_bits8(chip, OXYGEN_MPU401_CONTROL, OXYGEN_MPU401_LOOPBACK);
oxygen_write8(chip, OXYGEN_GPI_INTERRUPT_MASK, 0);
oxygen_write16(chip, OXYGEN_GPIO_INTERRUPT_MASK, 0);
@@ -534,3 +538,99 @@
pci_set_drvdata(pci, NULL);
}
EXPORT_SYMBOL(oxygen_pci_remove);
+
+#ifdef CONFIG_PM
+int oxygen_pci_suspend(struct pci_dev *pci, pm_message_t state)
+{
+ struct snd_card *card = pci_get_drvdata(pci);
+ struct oxygen *chip = card->private_data;
+ unsigned int i, saved_interrupt_mask;
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+
+ for (i = 0; i < PCM_COUNT; ++i)
+ if (chip->streams[i])
+ snd_pcm_suspend(chip->streams[i]);
+
+ if (chip->model->suspend)
+ chip->model->suspend(chip);
+
+ spin_lock_irq(&chip->reg_lock);
+ saved_interrupt_mask = chip->interrupt_mask;
+ chip->interrupt_mask = 0;
+ oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
+ oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
+ spin_unlock_irq(&chip->reg_lock);
+
+ synchronize_irq(chip->irq);
+ flush_scheduled_work();
+ chip->interrupt_mask = saved_interrupt_mask;
+
+ pci_disable_device(pci);
+ pci_save_state(pci);
+ pci_set_power_state(pci, pci_choose_state(pci, state));
+ return 0;
+}
+EXPORT_SYMBOL(oxygen_pci_suspend);
+
+static const u32 registers_to_restore[OXYGEN_IO_SIZE / 32] = {
+ 0xffffffff, 0x00ff077f, 0x00011d08, 0x007f00ff,
+ 0x00300000, 0x00000fe4, 0x0ff7001f, 0x00000000
+};
+static const u32 ac97_registers_to_restore[2][0x40 / 32] = {
+ { 0x18284fa2, 0x03060000 },
+ { 0x00007fa6, 0x00200000 }
+};
+
+static inline int is_bit_set(const u32 *bitmap, unsigned int bit)
+{
+ return bitmap[bit / 32] & (1 << (bit & 31));
+}
+
+static void oxygen_restore_ac97(struct oxygen *chip, unsigned int codec)
+{
+ unsigned int i;
+
+ oxygen_write_ac97(chip, codec, AC97_RESET, 0);
+ msleep(1);
+ for (i = 1; i < 0x40; ++i)
+ if (is_bit_set(ac97_registers_to_restore[codec], i))
+ oxygen_write_ac97(chip, codec, i * 2,
+ chip->saved_ac97_registers[codec][i]);
+}
+
+int oxygen_pci_resume(struct pci_dev *pci)
+{
+ struct snd_card *card = pci_get_drvdata(pci);
+ struct oxygen *chip = card->private_data;
+ unsigned int i;
+
+ pci_set_power_state(pci, PCI_D0);
+ pci_restore_state(pci);
+ if (pci_enable_device(pci) < 0) {
+ snd_printk(KERN_ERR "cannot reenable device");
+ snd_card_disconnect(card);
+ return -EIO;
+ }
+ pci_set_master(pci);
+
+ oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
+ oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
+ for (i = 0; i < OXYGEN_IO_SIZE; ++i)
+ if (is_bit_set(registers_to_restore, i))
+ oxygen_write8(chip, i, chip->saved_registers._8[i]);
+ if (chip->has_ac97_0)
+ oxygen_restore_ac97(chip, 0);
+ if (chip->has_ac97_1)
+ oxygen_restore_ac97(chip, 1);
+
+ if (chip->model->resume)
+ chip->model->resume(chip);
+
+ oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, chip->interrupt_mask);
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+ return 0;
+}
+EXPORT_SYMBOL(oxygen_pci_resume);
+#endif /* CONFIG_PM */