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-rw-r--r--sound/ppc/daca.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/sound/ppc/daca.c b/sound/ppc/daca.c
new file mode 100644
index 0000000000..4da9278dd5
--- /dev/null
+++ b/sound/ppc/daca.c
@@ -0,0 +1,277 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PMac DACA lowlevel functions
+ *
+ * Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ */
+
+
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/kmod.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include "pmac.h"
+
+/* i2c address */
+#define DACA_I2C_ADDR 0x4d
+
+/* registers */
+#define DACA_REG_SR 0x01
+#define DACA_REG_AVOL 0x02
+#define DACA_REG_GCFG 0x03
+
+/* maximum volume value */
+#define DACA_VOL_MAX 0x38
+
+
+struct pmac_daca {
+ struct pmac_keywest i2c;
+ int left_vol, right_vol;
+ unsigned int deemphasis : 1;
+ unsigned int amp_on : 1;
+};
+
+
+/*
+ * initialize / detect DACA
+ */
+static int daca_init_client(struct pmac_keywest *i2c)
+{
+ unsigned short wdata = 0x00;
+ /* SR: no swap, 1bit delay, 32-48kHz */
+ /* GCFG: power amp inverted, DAC on */
+ if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
+ i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
+ return -EINVAL;
+ return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
+ 2, (unsigned char*)&wdata);
+}
+
+/*
+ * update volume
+ */
+static int daca_set_volume(struct pmac_daca *mix)
+{
+ unsigned char data[2];
+
+ if (! mix->i2c.client)
+ return -ENODEV;
+
+ if (mix->left_vol > DACA_VOL_MAX)
+ data[0] = DACA_VOL_MAX;
+ else
+ data[0] = mix->left_vol;
+ if (mix->right_vol > DACA_VOL_MAX)
+ data[1] = DACA_VOL_MAX;
+ else
+ data[1] = mix->right_vol;
+ data[1] |= mix->deemphasis ? 0x40 : 0;
+ if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
+ 2, data) < 0) {
+ snd_printk(KERN_ERR "failed to set volume \n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+
+/* deemphasis switch */
+#define daca_info_deemphasis snd_ctl_boolean_mono_info
+
+static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+ struct pmac_daca *mix;
+ mix = chip->mixer_data;
+ if (!mix)
+ return -ENODEV;
+ ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
+ return 0;
+}
+
+static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+ struct pmac_daca *mix;
+ int change;
+
+ mix = chip->mixer_data;
+ if (!mix)
+ return -ENODEV;
+ change = mix->deemphasis != ucontrol->value.integer.value[0];
+ if (change) {
+ mix->deemphasis = !!ucontrol->value.integer.value[0];
+ daca_set_volume(mix);
+ }
+ return change;
+}
+
+/* output volume */
+static int daca_info_volume(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 2;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = DACA_VOL_MAX;
+ return 0;
+}
+
+static int daca_get_volume(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+ struct pmac_daca *mix;
+ mix = chip->mixer_data;
+ if (!mix)
+ return -ENODEV;
+ ucontrol->value.integer.value[0] = mix->left_vol;
+ ucontrol->value.integer.value[1] = mix->right_vol;
+ return 0;
+}
+
+static int daca_put_volume(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+ struct pmac_daca *mix;
+ unsigned int vol[2];
+ int change;
+
+ mix = chip->mixer_data;
+ if (!mix)
+ return -ENODEV;
+ vol[0] = ucontrol->value.integer.value[0];
+ vol[1] = ucontrol->value.integer.value[1];
+ if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
+ return -EINVAL;
+ change = mix->left_vol != vol[0] ||
+ mix->right_vol != vol[1];
+ if (change) {
+ mix->left_vol = vol[0];
+ mix->right_vol = vol[1];
+ daca_set_volume(mix);
+ }
+ return change;
+}
+
+/* amplifier switch */
+#define daca_info_amp daca_info_deemphasis
+
+static int daca_get_amp(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+ struct pmac_daca *mix;
+ mix = chip->mixer_data;
+ if (!mix)
+ return -ENODEV;
+ ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
+ return 0;
+}
+
+static int daca_put_amp(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+ struct pmac_daca *mix;
+ int change;
+
+ mix = chip->mixer_data;
+ if (!mix)
+ return -ENODEV;
+ change = mix->amp_on != ucontrol->value.integer.value[0];
+ if (change) {
+ mix->amp_on = !!ucontrol->value.integer.value[0];
+ i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
+ mix->amp_on ? 0x05 : 0x04);
+ }
+ return change;
+}
+
+static const struct snd_kcontrol_new daca_mixers[] = {
+ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Deemphasis Switch",
+ .info = daca_info_deemphasis,
+ .get = daca_get_deemphasis,
+ .put = daca_put_deemphasis
+ },
+ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Master Playback Volume",
+ .info = daca_info_volume,
+ .get = daca_get_volume,
+ .put = daca_put_volume
+ },
+ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Power Amplifier Switch",
+ .info = daca_info_amp,
+ .get = daca_get_amp,
+ .put = daca_put_amp
+ },
+};
+
+
+#ifdef CONFIG_PM
+static void daca_resume(struct snd_pmac *chip)
+{
+ struct pmac_daca *mix = chip->mixer_data;
+ i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
+ i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
+ mix->amp_on ? 0x05 : 0x04);
+ daca_set_volume(mix);
+}
+#endif /* CONFIG_PM */
+
+
+static void daca_cleanup(struct snd_pmac *chip)
+{
+ struct pmac_daca *mix = chip->mixer_data;
+ if (! mix)
+ return;
+ snd_pmac_keywest_cleanup(&mix->i2c);
+ kfree(mix);
+ chip->mixer_data = NULL;
+}
+
+/* exported */
+int snd_pmac_daca_init(struct snd_pmac *chip)
+{
+ int i, err;
+ struct pmac_daca *mix;
+
+ request_module("i2c-powermac");
+
+ mix = kzalloc(sizeof(*mix), GFP_KERNEL);
+ if (! mix)
+ return -ENOMEM;
+ chip->mixer_data = mix;
+ chip->mixer_free = daca_cleanup;
+ mix->amp_on = 1; /* default on */
+
+ mix->i2c.addr = DACA_I2C_ADDR;
+ mix->i2c.init_client = daca_init_client;
+ mix->i2c.name = "DACA";
+ err = snd_pmac_keywest_init(&mix->i2c);
+ if (err < 0)
+ return err;
+
+ /*
+ * build mixers
+ */
+ strcpy(chip->card->mixername, "PowerMac DACA");
+
+ for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
+ err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip));
+ if (err < 0)
+ return err;
+ }
+
+#ifdef CONFIG_PM
+ chip->resume = daca_resume;
+#endif
+
+ return 0;
+}
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