1 files changed, 103 insertions, 3 deletions

diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 897697d43506..22f37851045e 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -32,7 +32,7 @@
 
 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
 MODULE_DESCRIPTION("C-Media CMI8788 helper library");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 
 
 static irqreturn_t oxygen_interrupt(int dummy, void *dev_id)
@@ -173,7 +173,7 @@ static void oxygen_proc_read(struct snd_info_entry *entry,
         int i, j;
 
         snd_iprintf(buffer, "CMI8788\n\n");
-        for (i = 0; i < 0x100; i += 0x10) {
+        for (i = 0; i < OXYGEN_IO_SIZE; i += 0x10) {
                 snd_iprintf(buffer, "%02x:", i);
                 for (j = 0; j < 0x10; ++j)
                         snd_iprintf(buffer, " %02x", oxygen_read8(chip, i + j));
@@ -314,6 +314,10 @@ static void oxygen_init(struct oxygen *chip)
                                     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);
@@ -455,7 +459,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
         }
 
         if (!(pci_resource_flags(pci, 0) & IORESOURCE_IO) ||
-            pci_resource_len(pci, 0) < 0x100) {
+            pci_resource_len(pci, 0) < OXYGEN_IO_SIZE) {
                 snd_printk(KERN_ERR "invalid PCI I/O range\n");
                 err = -ENXIO;
                 goto err_pci_regions;
@@ -534,3 +538,99 @@ void oxygen_pci_remove(struct pci_dev *pci)
         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 */