ALSA: ice1724 - Add ESI Maya44 support

Added the support for ESI Maya44 board to ice1724 driver.

Signed-off-by: Takashi Iwai <[e-mail]>

Documentation/sound/alsa/ALSA-Configuration.txt

···
 			* Onkyo SE-90PCI
 			* Onkyo SE-200PCI
 			* ESI Juli@
+			* ESI Maya44
 			* Hercules Fortissimo IV
 			* EGO-SYS WaveTerminal 192M
 
···
 		  prodigy71xt, prodigy71hifi, prodigyhd2, prodigy192,
 		  juli, aureon51, aureon71, universe, ap192, k8x800,
 		  phase22, phase28, ms300, av710, se200pci, se90pci,
-		  fortissimo4, sn25p, WT192M
+		  fortissimo4, sn25p, WT192M, maya44
 
     This module supports multiple cards and autoprobe.
 

Documentation/sound/alsa/README.maya44

···
+NOTE: The following is the original document of Rainer's patch that the
+current maya44 code based on.  Some contents might be obsoleted, but I
+keep here as reference -- tiwai
+
+----------------------------------------------------------------
+ 
+STATE OF DEVELOPMENT:
+
+This driver is being developed on the initiative of Piotr Makowski ([e-mail]) and financed by Lars Bergmann.
+Development is carried out by Rainer Zimmermann ([e-mail]).
+
+ESI provided a sample Maya44 card for the development work.
+
+However, unfortunately it has turned out difficult to get detailed programming information, so I (Rainer Zimmermann) had to find out some card-specific information by experiment and conjecture. Some information (in particular, several GPIO bits) is still missing.
+
+This is the first testing version of the Maya44 driver released to the alsa-devel mailing list (Feb 5, 2008).
+
+
+The following functions work, as tested by Rainer Zimmermann and Piotr Makowski:
+
+- playback and capture at all sampling rates
+- input/output level
+- crossmixing
+- line/mic switch
+- phantom power switch
+- analogue monitor a.k.a bypass
+
+
+The following functions *should* work, but are not fully tested:
+
+- Channel 3+4 analogue - S/PDIF input switching
+- S/PDIF output
+- all inputs/outputs on the M/IO/DIO extension card
+- internal/external clock selection
+
+
+*In particular, we would appreciate testing of these functions by anyone who has access to an M/IO/DIO extension card.*
+
+
+Things that do not seem to work:
+
+- The level meters ("multi track") in 'alsamixer' do not seem to react to signals in (if this is a bug, it would probably be in the existing ICE1724 code).
+
+- Ardour 2.1 seems to work only via JACK, not using ALSA directly or via OSS. This still needs to be tracked down.
+
+
+DRIVER DETAILS:
+
+the following files were added:
+
+pci/ice1724/maya44.c        - Maya44 specific code
+pci/ice1724/maya44.h
+pci/ice1724/ice1724.patch
+pci/ice1724/ice1724.h.patch - PROPOSED patch to ice1724.h (see SAMPLING RATES)
+i2c/other/wm8776.c  - low-level access routines for Wolfson WM8776 codecs 
+include/wm8776.h
+
+
+Note that the wm8776.c code is meant to be card-independent and does not actually register the codec with the ALSA infrastructure.
+This is done in maya44.c, mainly because some of the WM8776 controls are used in Maya44-specific ways, and should be named appropriately.
+
+
+the following files were created in pci/ice1724, simply #including the corresponding file from the alsa-kernel tree:
+
+wtm.h
+vt1720_mobo.h
+revo.h
+prodigy192.h
+pontis.h
+phase.h
+maya44.h
+juli.h
+aureon.h
+amp.h
+envy24ht.h
+se.h
+prodigy_hifi.h
+
+
+*I hope this is the correct way to do things.*
+
+
+SAMPLING RATES:
+
+The Maya44 card (or more exactly, the Wolfson WM8776 codecs) allow a maximum sampling rate of 192 kHz for playback and 92 kHz for capture.
+
+As the ICE1724 chip only allows one global sampling rate, this is handled as follows:
+
+* setting the sampling rate on any open PCM device on the maya44 card will always set the *global* sampling rate for all playback and capture channels.
+
+* In the current state of the driver, setting rates of up to 192 kHz is permitted even for capture devices.
+
+*AVOID CAPTURING AT RATES ABOVE 96kHz*, even though it may appear to work. The codec cannot actually capture at such rates, meaning poor quality.
+
+
+I propose some additional code for limiting the sampling rate when setting on a capture pcm device. However because of the global sampling rate, this logic would be somewhat problematic.
+
+The proposed code (currently deactivated) is in ice1712.h.patch, ice1724.c and maya44.c (in pci/ice1712).
+
+
+SOUND DEVICES:
+
+PCM devices correspond to inputs/outputs as follows (assuming Maya44 is card #0):
+
+hw:0,0 input - stereo, analog input 1+2
+hw:0,0 output - stereo, analog output 1+2
+hw:0,1 input - stereo, analog input 3+4 OR S/PDIF input
+hw:0,1 output - stereo, analog output 3+4 (and SPDIF out)
+
+
+NAMING OF MIXER CONTROLS:
+
+(for more information about the signal flow, please refer to the block diagram on p.24 of the ESI Maya44 manual, or in the ESI windows software).
+
+
+PCM: (digital) output level for channel 1+2
+PCM 1: same for channel 3+4
+
+Mic Phantom+48V: switch for +48V phantom power for electrostatic microphones on input 1/2.
+    Make sure this is not turned on while any other source is connected to input 1/2.
+    It might damage the source and/or the maya44 card.
+
+Mic/Line input: if switch is is on, input jack 1/2 is microphone input (mono), otherwise line input (stereo).
+
+Bypass: analogue bypass from ADC input to output for channel 1+2. Same as "Monitor" in the windows driver.
+Bypass 1: same for channel 3+4.
+
+Crossmix: cross-mixer from channels 1+2 to channels 3+4
+Crossmix 1: cross-mixer from channels 3+4 to channels 1+2
+
+IEC958 Output: switch for S/PDIF output.
+    This is not supported by the ESI windows driver.
+    S/PDIF should output the same signal as channel 3+4. [untested!]
+
+
+Digitial output selectors:
+
+    These switches allow a direct digital routing from the ADCs to the DACs.
+    Each switch determines where the digital input data to one of the DACs comes from.
+    They are not supported by the ESI windows driver.
+    For normal operation, they should all be set to "PCM out".
+
+H/W: Output source channel 1
+H/W 1: Output source channel 2
+H/W 2: Output source channel 3
+H/W 3: Output source channel 4
+
+H/W 4 ... H/W 9: unknown function, left in to enable testing.
+    Possibly some of these control S/PDIF output(s).
+    If these turn out to be unused, they will go away in later driver versions.
+
+Selectable values for each of the digital output selectors are:
+   "PCM out" -> DAC output of the corresponding channel (default setting)
+   "Input 1"...
+   "Input 4" -> direct routing from ADC output of the selected input channel
+
+
+--------
+
+Feb 14, 2008
+Rainer Zimmermann
[e-mail]
+

sound/pci/ice1712/Makefile

···
 
 snd-ice17xx-ak4xxx-objs := ak4xxx.o
 snd-ice1712-objs := ice1712.o delta.o hoontech.o ews.o
-snd-ice1724-objs := ice1724.o amp.o revo.o aureon.o vt1720_mobo.o pontis.o prodigy192.o prodigy_hifi.o juli.o phase.o wtm.o se.o
+snd-ice1724-objs := ice1724.o amp.o revo.o aureon.o vt1720_mobo.o pontis.o prodigy192.o prodigy_hifi.o juli.o phase.o wtm.o se.o maya44.o
 
 # Toplevel Module Dependency
 obj-$(CONFIG_SND_ICE1712) += snd-ice1712.o snd-ice17xx-ak4xxx.o

sound/pci/ice1712/ice1724.c

···
 #include "prodigy192.h"
 #include "prodigy_hifi.h"
 #include "juli.h"
+#include "maya44.h"
 #include "phase.h"
 #include "wtm.h"
 #include "se.h"
···
 	       PRODIGY192_DEVICE_DESC
 	       PRODIGY_HIFI_DEVICE_DESC
 	       JULI_DEVICE_DESC
+	       MAYA44_DEVICE_DESC
 	       PHASE_DEVICE_DESC
 	       WTM_DEVICE_DESC
 	       SE_DEVICE_DESC
···
 	snd_vt1724_prodigy_hifi_cards,
 	snd_vt1724_prodigy192_cards,
 	snd_vt1724_juli_cards,
+	snd_vt1724_maya44_cards,
 	snd_vt1724_phase_cards,
 	snd_vt1724_wtm_cards,
 	snd_vt1724_se_cards,

sound/pci/ice1712/maya44.c

···
+/*
+ *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
+ *
+ *   Lowlevel functions for ESI Maya44 cards
+ *
+ *	Copyright (c) 2009 Takashi Iwai <[e-mail]>
+ *	Based on the patches by Rainer Zimmermann <[e-mail]>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/tlv.h>
+
+#include "ice1712.h"
+#include "envy24ht.h"
+#include "maya44.h"
+
+/* WM8776 register indexes */
+#define WM8776_REG_HEADPHONE_L		0x00
+#define WM8776_REG_HEADPHONE_R		0x01
+#define WM8776_REG_HEADPHONE_MASTER	0x02
+#define WM8776_REG_DAC_ATTEN_L		0x03
+#define WM8776_REG_DAC_ATTEN_R		0x04
+#define WM8776_REG_DAC_ATTEN_MASTER	0x05
+#define WM8776_REG_DAC_PHASE		0x06
+#define WM8776_REG_DAC_CONTROL		0x07
+#define WM8776_REG_DAC_MUTE		0x08
+#define WM8776_REG_DAC_DEEMPH		0x09
+#define WM8776_REG_DAC_IF_CONTROL	0x0a
+#define WM8776_REG_ADC_IF_CONTROL	0x0b
+#define WM8776_REG_MASTER_MODE_CONTROL	0x0c
+#define WM8776_REG_POWERDOWN		0x0d
+#define WM8776_REG_ADC_ATTEN_L		0x0e
+#define WM8776_REG_ADC_ATTEN_R		0x0f
+#define WM8776_REG_ADC_ALC1		0x10
+#define WM8776_REG_ADC_ALC2		0x11
+#define WM8776_REG_ADC_ALC3		0x12
+#define WM8776_REG_ADC_NOISE_GATE	0x13
+#define WM8776_REG_ADC_LIMITER		0x14
+#define WM8776_REG_ADC_MUX		0x15
+#define WM8776_REG_OUTPUT_MUX		0x16
+#define WM8776_REG_RESET		0x17
+
+#define WM8776_NUM_REGS			0x18
+
+/* clock ratio identifiers for snd_wm8776_set_rate() */
+#define WM8776_CLOCK_RATIO_128FS	0
+#define WM8776_CLOCK_RATIO_192FS	1
+#define WM8776_CLOCK_RATIO_256FS	2
+#define WM8776_CLOCK_RATIO_384FS	3
+#define WM8776_CLOCK_RATIO_512FS	4
+#define WM8776_CLOCK_RATIO_768FS	5
+
+enum { WM_VOL_HP, WM_VOL_DAC, WM_VOL_ADC, WM_NUM_VOLS };
+enum { WM_SW_DAC, WM_SW_BYPASS, WM_NUM_SWITCHES };
+
+struct snd_wm8776 {
+	unsigned char addr;
+	unsigned short regs[WM8776_NUM_REGS];
+	unsigned char volumes[WM_NUM_VOLS][2];
+	unsigned int switch_bits;
+};
+
+struct snd_maya44 {
+	struct snd_ice1712 *ice;
+	struct snd_wm8776 wm[2];
+	struct mutex mutex;
+};
+
+
+/* write the given register and save the data to the cache */
+static void wm8776_write(struct snd_ice1712 *ice, struct snd_wm8776 *wm,
+			 unsigned char reg, unsigned short val)
+{
+	/*
+	 * WM8776 registers are up to 9 bits wide, bit 8 is placed in the LSB
+	 * of the address field
+	 */
+	snd_vt1724_write_i2c(ice, wm->addr,
+			     (reg << 1) | ((val >> 8) & 1),
+			     val & 0xff);
+	wm->regs[reg] = val;
+}
+
+/*
+ * update the given register with and/or mask and save the data to the cache
+ */
+static int wm8776_write_bits(struct snd_ice1712 *ice, struct snd_wm8776 *wm,
+			     unsigned char reg,
+			     unsigned short mask, unsigned short val)
+{
+	val |= wm->regs[reg] & ~mask;
+	if (val != wm->regs[reg]) {
+		wm8776_write(ice, wm, reg, val);
+		return 1;
+	}
+	return 0;
+}
+
+
+/*
+ * WM8776 volume controls
+ */
+
+struct maya_vol_info {
+	unsigned int maxval;		/* volume range: 0..maxval */
+	unsigned char regs[2];		/* left and right registers */
+	unsigned short mask;		/* value mask */
+	unsigned short offset;		/* zero-value offset */
+	unsigned short mute;		/* mute bit */
+	unsigned short update;		/* update bits */
+	unsigned char mux_bits[2];	/* extra bits for ADC mute */
+};
+
+static struct maya_vol_info vol_info[WM_NUM_VOLS] = {
+	[WM_VOL_HP] = {
+		.maxval = 80,
+		.regs = { WM8776_REG_HEADPHONE_L, WM8776_REG_HEADPHONE_R },
+		.mask = 0x7f,
+		.offset = 0x30,
+		.mute = 0x00,
+		.update = 0x180,	/* update and zero-cross enable */
+	},
+	[WM_VOL_DAC] = {
+		.maxval = 255,
+		.regs = { WM8776_REG_DAC_ATTEN_L, WM8776_REG_DAC_ATTEN_R },
+		.mask = 0xff,
+		.offset = 0x01,
+		.mute = 0x00,
+		.update = 0x100,	/* zero-cross enable */
+	},
+	[WM_VOL_ADC] = {
+		.maxval = 91,
+		.regs = { WM8776_REG_ADC_ATTEN_L, WM8776_REG_ADC_ATTEN_R },
+		.mask = 0xff,
+		.offset = 0xa5,
+		.mute = 0xa5,
+		.update = 0x100,	/* update */
+		.mux_bits = { 0x80, 0x40 }, /* ADCMUX bits */
+	},
+};
+
+/*
+ * dB tables
+ */
+/* headphone output: mute, -73..+6db (1db step) */
+static const DECLARE_TLV_DB_SCALE(db_scale_hp, -7400, 100, 1);
+/* DAC output: mute, -127..0db (0.5db step) */
+static const DECLARE_TLV_DB_SCALE(db_scale_dac, -12750, 50, 1);
+/* ADC gain: mute, -21..+24db (0.5db step) */
+static const DECLARE_TLV_DB_SCALE(db_scale_adc, -2100, 50, 1);
+
+static int maya_vol_info(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_info *uinfo)
+{
+	unsigned int idx = kcontrol->private_value;
+	struct maya_vol_info *vol = &vol_info[idx];
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = vol->maxval;
+	return 0;
+}
+
+static int maya_vol_get(struct snd_kcontrol *kcontrol,
+			struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	struct snd_wm8776 *wm =
+		&chip->wm[snd_ctl_get_ioff(kcontrol, &ucontrol->id)];
+	unsigned int idx = kcontrol->private_value;
+
+	mutex_lock(&chip->mutex);
+	ucontrol->value.integer.value[0] = wm->volumes[idx][0];
+	ucontrol->value.integer.value[1] = wm->volumes[idx][1];
+	mutex_unlock(&chip->mutex);
+	return 0;
+}
+
+static int maya_vol_put(struct snd_kcontrol *kcontrol,
+			struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	struct snd_wm8776 *wm =
+		&chip->wm[snd_ctl_get_ioff(kcontrol, &ucontrol->id)];
+	unsigned int idx = kcontrol->private_value;
+	struct maya_vol_info *vol = &vol_info[idx];
+	unsigned int val, data;
+	int ch, changed = 0;
+
+	mutex_lock(&chip->mutex);
+	for (ch = 0; ch < 2; ch++) {
+		val = ucontrol->value.integer.value[ch];
+		if (val > vol->maxval)
+			val = vol->maxval;
+		if (val == wm->volumes[idx][ch])
+			continue;
+		if (!val)
+			data = vol->mute;
+		else
+			data = (val - 1) + vol->offset;
+		data |= vol->update;
+		changed |= wm8776_write_bits(chip->ice, wm, vol->regs[ch],
+					     vol->mask | vol->update, data);
+		if (vol->mux_bits[ch])
+			wm8776_write_bits(chip->ice, wm, WM8776_REG_ADC_MUX,
+					  vol->mux_bits[ch],
+					  val ? 0 : vol->mux_bits[ch]);
+		wm->volumes[idx][ch] = val;
+	}
+	mutex_unlock(&chip->mutex);
+	return changed;
+}
+
+/*
+ * WM8776 switch controls
+ */
+
+#define COMPOSE_SW_VAL(idx, reg, mask)	((idx) | ((reg) << 8) | ((mask) << 16))
+#define GET_SW_VAL_IDX(val)	((val) & 0xff)
+#define GET_SW_VAL_REG(val)	(((val) >> 8) & 0xff)
+#define GET_SW_VAL_MASK(val)	(((val) >> 16) & 0xff)
+
+#define maya_sw_info	snd_ctl_boolean_mono_info
+
+static int maya_sw_get(struct snd_kcontrol *kcontrol,
+		       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	struct snd_wm8776 *wm =
+		&chip->wm[snd_ctl_get_ioff(kcontrol, &ucontrol->id)];
+	unsigned int idx = GET_SW_VAL_IDX(kcontrol->private_value);
+
+	ucontrol->value.integer.value[0] = (wm->switch_bits >> idx) & 1;
+	return 0;
+}
+
+static int maya_sw_put(struct snd_kcontrol *kcontrol,
+		       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	struct snd_wm8776 *wm =
+		&chip->wm[snd_ctl_get_ioff(kcontrol, &ucontrol->id)];
+	unsigned int idx = GET_SW_VAL_IDX(kcontrol->private_value);
+	unsigned int mask, val;
+	int changed;
+
+	mutex_lock(&chip->mutex);
+	mask = 1 << idx;
+	wm->switch_bits &= ~mask;
+	val = ucontrol->value.integer.value[0];
+	if (val)
+		wm->switch_bits |= mask;
+	mask = GET_SW_VAL_MASK(kcontrol->private_value);
+	changed = wm8776_write_bits(chip->ice, wm,
+				    GET_SW_VAL_REG(kcontrol->private_value),
+				    mask, val ? mask : 0);
+	mutex_unlock(&chip->mutex);
+	return changed;
+}
+
+/*
+ * GPIO pins (known ones for maya44)
+ */
+#define GPIO_PHANTOM_OFF	2
+#define GPIO_MIC_RELAY		4
+#define GPIO_SPDIF_IN_INV	5
+#define GPIO_MUST_BE_0		7
+
+/*
+ * GPIO switch controls
+ */
+
+#define COMPOSE_GPIO_VAL(shift, inv)	((shift) | ((inv) << 8))
+#define GET_GPIO_VAL_SHIFT(val)		((val) & 0xff)
+#define GET_GPIO_VAL_INV(val)		(((val) >> 8) & 1)
+
+static int maya_set_gpio_bits(struct snd_ice1712 *ice, unsigned int mask,
+			      unsigned int bits)
+{
+	unsigned int data;
+	data = snd_ice1712_gpio_read(ice);
+	if ((data & mask) == bits)
+		return 0;
+	snd_ice1712_gpio_write(ice, (data & ~mask) | bits);
+	return 1;
+}
+
+#define maya_gpio_sw_info	snd_ctl_boolean_mono_info
+
+static int maya_gpio_sw_get(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	unsigned int shift = GET_GPIO_VAL_SHIFT(kcontrol->private_value);
+	unsigned int val;
+
+	val = (snd_ice1712_gpio_read(chip->ice) >> shift) & 1;
+	if (GET_GPIO_VAL_INV(kcontrol->private_value))
+		val = !val;
+	ucontrol->value.integer.value[0] = val;
+	return 0;
+}
+
+static int maya_gpio_sw_put(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	unsigned int shift = GET_GPIO_VAL_SHIFT(kcontrol->private_value);
+	unsigned int val, mask;
+	int changed;
+
+	mutex_lock(&chip->mutex);
+	mask = 1 << shift;
+	val = ucontrol->value.integer.value[0];
+	if (GET_GPIO_VAL_INV(kcontrol->private_value))
+		val = !val;
+	val = val ? mask : 0;
+	changed = maya_set_gpio_bits(chip->ice, mask, val);
+	mutex_unlock(&chip->mutex);
+	return changed;
+}
+
+/*
+ * capture source selection
+ */
+
+/* known working input slots (0-4) */
+#define MAYA_LINE_IN	1	/* in-2 */
+#define MAYA_MIC_IN	4	/* in-5 */
+
+static void wm8776_select_input(struct snd_maya44 *chip, int idx, int line)
+{
+	wm8776_write_bits(chip->ice, &chip->wm[idx], WM8776_REG_ADC_MUX,
+			  0x1f, 1 << line);
+}
+
+static int maya_rec_src_info(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_info *uinfo)
+{
+	static char *texts[] = { "Line", "Mic" };
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = ARRAY_SIZE(texts);
+	if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
+		uinfo->value.enumerated.item =
+			uinfo->value.enumerated.items - 1;
+	strcpy(uinfo->value.enumerated.name,
+	       texts[uinfo->value.enumerated.item]);
+	return 0;
+}
+
+static int maya_rec_src_get(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	int sel;
+
+	if (snd_ice1712_gpio_read(chip->ice) & (1 << GPIO_MIC_RELAY))
+		sel = 1;
+	else
+		sel = 0;
+	ucontrol->value.enumerated.item[0] = sel;
+	return 0;
+}
+
+static int maya_rec_src_put(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	int sel = ucontrol->value.enumerated.item[0];
+	int changed;
+
+	mutex_lock(&chip->mutex);
+	changed = maya_set_gpio_bits(chip->ice, GPIO_MIC_RELAY,
+				     sel ? GPIO_MIC_RELAY : 0);
+	wm8776_select_input(chip, 0, sel ? MAYA_MIC_IN : MAYA_LINE_IN);
+	mutex_unlock(&chip->mutex);
+	return changed;
+}
+
+/*
+ * Maya44 routing switch settings have different meanings than the standard
+ * ice1724 switches as defined in snd_vt1724_pro_route_info (ice1724.c).
+ */
+static int maya_pb_route_info(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_info *uinfo)
+{
+	static char *texts[] = {
+		"PCM Out", /* 0 */
+		"Input 1", "Input 2", "Input 3", "Input 4"
+	};
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = ARRAY_SIZE(texts);
+	if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
+		uinfo->value.enumerated.item =
+			uinfo->value.enumerated.items - 1;
+	strcpy(uinfo->value.enumerated.name,
+	       texts[uinfo->value.enumerated.item]);
+	return 0;
+}
+
+static int maya_pb_route_shift(int idx)
+{
+	static const unsigned char shift[10] =
+		{ 8, 20, 0, 3, 11, 23, 14, 26, 17, 29 };
+	return shift[idx % 10];
+}
+
+static int maya_pb_route_get(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+	ucontrol->value.enumerated.item[0] =
+		snd_ice1724_get_route_val(chip->ice, maya_pb_route_shift(idx));
+	return 0;
+}
+
+static int maya_pb_route_put(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_maya44 *chip = snd_kcontrol_chip(kcontrol);
+	int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+	return snd_ice1724_put_route_val(chip->ice,
+					 ucontrol->value.enumerated.item[0],
+					 maya_pb_route_shift(idx));
+}
+
+
+/*
+ * controls to be added
+ */
+
+static struct snd_kcontrol_new maya_controls[] __devinitdata = {
+	{
+		.name = "Crossmix Playback Volume",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+		.info = maya_vol_info,
+		.get = maya_vol_get,
+		.put = maya_vol_put,
+		.tlv = { .p = db_scale_hp },
+		.private_value = WM_VOL_HP,
+		.count = 2,
+	},
+	{
+		.name = "PCM Playback Volume",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+		.info = maya_vol_info,
+		.get = maya_vol_get,
+		.put = maya_vol_put,
+		.tlv = { .p = db_scale_dac },
+		.private_value = WM_VOL_DAC,
+		.count = 2,
+	},
+	{
+		.name = "Line Capture Volume",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+		.info = maya_vol_info,
+		.get = maya_vol_get,
+		.put = maya_vol_put,
+		.tlv = { .p = db_scale_adc },
+		.private_value = WM_VOL_ADC,
+		.count = 2,
+	},
+	{
+		.name = "PCM Playback Switch",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.info = maya_sw_info,
+		.get = maya_sw_get,
+		.put = maya_sw_put,
+		.private_value = COMPOSE_SW_VAL(WM_SW_DAC,
+						WM8776_REG_OUTPUT_MUX, 0x01),
+		.count = 2,
+	},
+	{
+		.name = "Bypass Playback Switch",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.info = maya_sw_info,
+		.get = maya_sw_get,
+		.put = maya_sw_put,
+		.private_value = COMPOSE_SW_VAL(WM_SW_BYPASS,
+						WM8776_REG_OUTPUT_MUX, 0x04),
+		.count = 2,
+	},
+	{
+		.name = "Capture Source",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.info = maya_rec_src_info,
+		.get = maya_rec_src_get,
+		.put = maya_rec_src_put,
+	},
+	{
+		.name = "Mic Phantom Power Switch",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.info = maya_gpio_sw_info,
+		.get = maya_gpio_sw_get,
+		.put = maya_gpio_sw_put,
+		.private_value = COMPOSE_GPIO_VAL(GPIO_PHANTOM_OFF, 1),
+	},
+	{
+		.name = "SPDIF Capture Switch",
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.info = maya_gpio_sw_info,
+		.get = maya_gpio_sw_get,
+		.put = maya_gpio_sw_put,
+		.private_value = COMPOSE_GPIO_VAL(GPIO_SPDIF_IN_INV, 1),
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name = "H/W Playback Route",
+		.info = maya_pb_route_info,
+		.get = maya_pb_route_get,
+		.put = maya_pb_route_put,
+		.count = 4,  /* FIXME: do controls 5-9 have any meaning? */
+	},
+};
+
+static int __devinit maya44_add_controls(struct snd_ice1712 *ice)
+{
+	int err, i;
+
+	for (i = 0; i < ARRAY_SIZE(maya_controls); i++) {
+		err = snd_ctl_add(ice->card, snd_ctl_new1(&maya_controls[i],
+							  ice->spec));
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+
+
+/*
+ * initialize a wm8776 chip
+ */
+static void __devinit wm8776_init(struct snd_ice1712 *ice,
+				  struct snd_wm8776 *wm, unsigned int addr)
+{
+	static const unsigned short inits_wm8776[] = {
+		0x02, 0x100, /* R2: headphone L+R muted + update */
+		0x05, 0x100, /* R5: DAC output L+R muted + update */
+		0x06, 0x000, /* R6: DAC output phase normal */
+		0x07, 0x091, /* R7: DAC enable zero cross detection,
+				normal output */
+		0x08, 0x000, /* R8: DAC soft mute off */
+		0x09, 0x000, /* R9: no deemph, DAC zero detect disabled */
+		0x0a, 0x022, /* R10: DAC I2C mode, std polarities, 24bit */
+		0x0b, 0x022, /* R11: ADC I2C mode, std polarities, 24bit,
+				highpass filter enabled */
+		0x0c, 0x042, /* R12: ADC+DAC slave, ADC+DAC 44,1kHz */
+		0x0d, 0x000, /* R13: all power up */
+		0x0e, 0x100, /* R14: ADC left muted,
+				enable zero cross detection */
+		0x0f, 0x100, /* R15: ADC right muted,
+				enable zero cross detection */
+			     /* R16: ALC...*/
+		0x11, 0x000, /* R17: disable ALC */
+			     /* R18: ALC...*/
+			     /* R19: noise gate...*/
+		0x15, 0x000, /* R21: ADC input mux init, mute all inputs */
+		0x16, 0x001, /* R22: output mux, select DAC */
+		0xff, 0xff
+	};
+
+	const unsigned short *ptr;
+	unsigned char reg;
+	unsigned short data;
+
+	wm->addr = addr;
+	/* enable DAC output; mute bypass, aux & all inputs */
+	wm->switch_bits = (1 << WM_SW_DAC);
+
+	ptr = inits_wm8776;
+	while (*ptr != 0xff) {
+		reg = *ptr++;
+		data = *ptr++;
+		wm8776_write(ice, wm, reg, data);
+	}
+}
+
+
+/*
+ * change the rate on the WM8776 codecs.
+ * this assumes that the VT17xx's rate is changed by the calling function.
+ * NOTE: even though the WM8776's are running in slave mode and rate
+ * selection is automatic, we need to call snd_wm8776_set_rate() here
+ * to make sure some flags are set correctly.
+ */
+static void set_rate(struct snd_ice1712 *ice, unsigned int rate)
+{
+	struct snd_maya44 *chip = ice->spec;
+	unsigned int ratio, adc_ratio, val;
+	int i;
+
+	switch (rate) {
+	case 192000:
+		ratio = WM8776_CLOCK_RATIO_128FS;
+		break;
+	case 176400:
+		ratio = WM8776_CLOCK_RATIO_128FS;
+		break;
+	case 96000:
+		ratio = WM8776_CLOCK_RATIO_256FS;
+		break;
+	case 88200:
+		ratio = WM8776_CLOCK_RATIO_384FS;
+		break;
+	case 48000:
+		ratio = WM8776_CLOCK_RATIO_512FS;
+		break;
+	case 44100:
+		ratio = WM8776_CLOCK_RATIO_512FS;
+		break;
+	case 32000:
+		ratio = WM8776_CLOCK_RATIO_768FS;
+		break;
+	case 0:
+		/* no hint - S/PDIF input is master, simply return */
+		return;
+	default:
+		snd_BUG();
+		return;
+	}
+
+	/*
+	 * this currently sets the same rate for ADC and DAC, but limits
+	 * ADC rate to 256X (96kHz). For 256X mode (96kHz), this sets ADC
+	 * oversampling to 64x, as recommended by WM8776 datasheet.
+	 * Setting the rate is not really necessary in slave mode.
+	 */
+	adc_ratio = ratio;
+	if (adc_ratio < WM8776_CLOCK_RATIO_256FS)
+		adc_ratio = WM8776_CLOCK_RATIO_256FS;
+
+	val = adc_ratio;
+	if (adc_ratio == WM8776_CLOCK_RATIO_256FS)
+		val |= 8;
+	val |= ratio << 4;
+
+	mutex_lock(&chip->mutex);
+	for (i = 0; i < 2; i++)
+		wm8776_write_bits(ice, &chip->wm[i],
+				  WM8776_REG_MASTER_MODE_CONTROL,
+				  0x180, val);
+	mutex_unlock(&chip->mutex);
+}
+
+/*
+ * supported sample rates (to override the default one)
+ */
+
+static unsigned int rates[] = {
+	32000, 44100, 48000, 64000, 88200, 96000, 176400, 192000
+};
+
+/* playback rates: 32..192 kHz */
+static struct snd_pcm_hw_constraint_list dac_rates = {
+	.count = ARRAY_SIZE(rates),
+	.list = rates,
+	.mask = 0
+};
+
+
+/*
+ * chip addresses on I2C bus
+ */
+static unsigned char wm8776_addr[2] __devinitdata = {
+	0x34, 0x36, /* codec 0 & 1 */
+};
+
+/*
+ * initialize the chip
+ */
+static int __devinit maya44_init(struct snd_ice1712 *ice)
+{
+	int i;
+	struct snd_maya44 *chip;
+
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+	mutex_init(&chip->mutex);
+	chip->ice = ice;
+	ice->spec = chip;
+
+	/* initialise codecs */
+	ice->num_total_dacs = 4;
+	ice->num_total_adcs = 4;
+	ice->akm_codecs = 0;
+
+	for (i = 0; i < 2; i++) {
+		wm8776_init(ice, &chip->wm[i], wm8776_addr[i]);
+		wm8776_select_input(chip, i, MAYA_LINE_IN);
+	}
+
+	/* set card specific rates */
+	ice->hw_rates = &dac_rates;
+
+	/* register change rate notifier */
+	ice->gpio.set_pro_rate = set_rate;
+
+	/* RDMA1 (2nd input channel) is used for ADC by default */
+	ice->force_rdma1 = 1;
+
+	/* have an own routing control */
+	ice->own_routing = 1;
+
+	return 0;
+}
+
+
+/*
+ * Maya44 boards don't provide the EEPROM data except for the vendor IDs.
+ * hence the driver needs to sets up it properly.
+ */
+
+static unsigned char maya44_eeprom[] __devinitdata = {
+	[ICE_EEP2_SYSCONF]     = 0x45,
+		/* clock xin1=49.152MHz, mpu401, 2 stereo ADCs+DACs */
+	[ICE_EEP2_ACLINK]      = 0x80,
+		/* I2S */
+	[ICE_EEP2_I2S]         = 0xf8,
+		/* vol, 96k, 24bit, 192k */
+	[ICE_EEP2_SPDIF]       = 0xc3,
+		/* enable spdif out, spdif out supp, spdif-in, ext spdif out */
+	[ICE_EEP2_GPIO_DIR]    = 0xff,
+	[ICE_EEP2_GPIO_DIR1]   = 0xff,
+	[ICE_EEP2_GPIO_DIR2]   = 0xff,
+	[ICE_EEP2_GPIO_MASK]   = 0/*0x9f*/,
+	[ICE_EEP2_GPIO_MASK1]  = 0/*0xff*/,
+	[ICE_EEP2_GPIO_MASK2]  = 0/*0x7f*/,
+	[ICE_EEP2_GPIO_STATE]  = (1 << GPIO_PHANTOM_OFF) |
+			(1 << GPIO_SPDIF_IN_INV),
+	[ICE_EEP2_GPIO_STATE1] = 0x00,
+	[ICE_EEP2_GPIO_STATE2] = 0x00,
+};
+
+/* entry point */
+struct snd_ice1712_card_info snd_vt1724_maya44_cards[] __devinitdata = {
+	{
+		.subvendor = VT1724_SUBDEVICE_MAYA44,
+		.name = "ESI Maya44",
+		.model = "maya44",
+		.chip_init = maya44_init,
+		.build_controls = maya44_add_controls,
+		.eeprom_size = sizeof(maya44_eeprom),
+		.eeprom_data = maya44_eeprom,
+	},
+	{ } /* terminator */
+};

sound/pci/ice1712/maya44.h

···
+#ifndef __SOUND_MAYA44_H
+#define __SOUND_MAYA44_H
+
+#define MAYA44_DEVICE_DESC		"{ESI,Maya44},"
+
+#define VT1724_SUBDEVICE_MAYA44		0x34315441	/* Maya44 */
+
+extern struct snd_ice1712_card_info  snd_vt1724_maya44_cards[];
+
+#endif	/* __SOUND_MAYA44_H */