dmasound update from Christoph Hellwig

sound/oss/dmasound/Kconfig

@@ -12,9 +12,9 @@ config DMASOUND_ATARI
 	  want). If you want to compile it as a module, say M here and read
 	  <file:Documentation/modules.txt>.
 
-config DMASOUND_AWACS
+config DMASOUND_PMAC
 	tristate "PowerMac DMA sound support"
-	depends on PPC_PMAC && SOUND
+	depends on PPC_PMAC && SOUND && I2C
 	help
 	  If you want to use the internal audio of your PowerMac in Linux,
 	  answer Y to this question. This will provide a Sun-like /dev/audio,

sound/oss/dmasound/Makefile

@@ -2,7 +2,12 @@
 # Makefile for the DMA sound driver
 #
 
+dmasound_pmac-y			+= dmasound_awacs.o \
+				   trans_16.o dac3550a.o tas_common.o \
+				   tas3001c.o tas3001c_tables.o \
+				   tas3004.o tas3004_tables.o
+
 obj-$(CONFIG_DMASOUND_ATARI)	+= dmasound_core.o dmasound_atari.o
-obj-$(CONFIG_DMASOUND_AWACS)  += dmasound_core.o dmasound_awacs.o
+obj-$(CONFIG_DMASOUND_PMAC)	+= dmasound_core.o dmasound_pmac.o
 obj-$(CONFIG_DMASOUND_PAULA)	+= dmasound_core.o dmasound_paula.o
 obj-$(CONFIG_DMASOUND_Q40)	+= dmasound_core.o dmasound_q40.o

sound/oss/dmasound/awacs_defs.h

@@ -71,17 +71,20 @@ struct awacs_regs {
 /* ------- - --- ----- - ------ */
 #define MASK_GAINRIGHT	(0xf)		/* Gain Right Mask */
 #define MASK_GAINLEFT	(0xf << 4)	/* Gain Left Mask */
-#define MASK_GAINLINE	(0x1 << 8)	/* Change Gain for Line??? */
-#define MASK_GAINMIC	(0x0 << 8)	/* Change Gain for Mic??? */
+#define MASK_GAINLINE	(0x1 << 8)	/* Disable Mic preamp */
+#define MASK_GAINMIC	(0x0 << 8)	/* Enable Mic preamp */
 
 #define MASK_MUX_CD	(0x1 << 9)	/* Select CD in MUX */
-#define MASK_MUX_AUDIN	(0x1 << 10)	/* Select Audio In in MUX */
-#define MASK_MUX_MIC	(0x1 << 11)	/* Select Mic in MUX */
+#define MASK_MUX_MIC	(0x1 << 10)	/* Select Mic in MUX */
+#define MASK_MUX_AUDIN	(0x1 << 11)	/* Select Audio In in MUX */
 #define MASK_MUX_LINE	MASK_MUX_AUDIN
 
 #define GAINRIGHT(x)	((x) & MASK_GAINRIGHT)
 #define GAINLEFT(x)	(((x) << 4) & MASK_GAINLEFT)
 
+#define DEF_CD_GAIN 0x00bb
+#define DEF_MIC_GAIN 0x00cc
+
 /* Address 1 Bit Masks */
 /* ------- - --- ----- */
 #define MASK_ADDR1RES1	(0x3)		/* Reserved */
@@ -93,7 +96,10 @@ struct awacs_regs {
 #define MASK_ADDR1RES2	(0x1 << 8)	/* Reserved */
 #define MASK_AMUTE	(0x1 << 9)	/* Output A (Headphone) Mute when 1 */
 #define MASK_HDMUTE	MASK_AMUTE
-#define MASK_PAROUT	(0x3 << 10)	/* Parallel Out (???) */
+#define MASK_PAROUT0	(0x1 << 10)	/* Parallel Output 0 */
+#define MASK_PAROUT1	(0x2 << 10)	/* Parallel Output 1 */
+
+#define MASK_MIC_BOOST  (0x4)           /* screamer mic boost */
 
 #define SAMPLERATE_48000	(0x0 << 3)	/* 48 or 44.1 kHz */
 #define SAMPLERATE_32000	(0x1 << 3)	/* 32 or 29.4 kHz */
@@ -162,8 +168,9 @@ struct awacs_regs {
 
 #define RATE_LOW	1	/* HIGH = 48kHz, etc;  LOW = 44.1kHz, etc. */
 
-
+/*******************/
 /* Burgundy values */
+/*******************/
 
 #define MASK_ADDR_BURGUNDY_INPSEL21 (0x11 << 12)
 #define MASK_ADDR_BURGUNDY_INPSEL3 (0x12 << 12)
@@ -226,4 +233,19 @@ struct awacs_regs {
 #define DEF_BURGUNDY_ATTENLINEOUT (0xCC)
 #define DEF_BURGUNDY_ATTENHP (0xCC)
 
+/*********************/
+/* i2s layout values */
+/*********************/
+
+#define I2S_REG_INT_CTL			0x00
+#define I2S_REG_SERIAL_FORMAT		0x10
+#define I2S_REG_CODEC_MSG_OUT		0x20
+#define I2S_REG_CODEC_MSG_IN		0x30
+#define I2S_REG_FRAME_COUNT		0x40
+#define I2S_REG_FRAME_MATCH		0x50
+#define I2S_REG_DATAWORD_SIZES		0x60
+#define I2S_REG_PEAKLEVEL_SEL		0x70
+#define I2S_REG_PEAKLEVEL_IN0		0x80
+#define I2S_REG_PEAKLEVEL_IN1		0x90
+
 #endif /* _AWACS_DEFS_H_ */

sound/oss/dmasound/dac3550a.c

+/*
+ * Driver for the i2c/i2s based DAC3550a sound chip used
+ * on some Apple iBooks. Also known as "DACA".
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive
+ *  for more details.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/sysctl.h>
+#include <linux/types.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+
+#include "dmasound.h"
+
+/* FYI: This code was derived from the tas3001c.c Texas/Tumbler mixer
+ * control code, as well as info derived from the AppleDACAAudio driver
+ * from Darwin CVS (main thing I derived being register numbers and 
+ * values, as well as when to make the calls). */
+
+#define I2C_DRIVERID_DACA (0xFDCB)
+
+#define DACA_VERSION	"0.1"
+#define DACA_DATE "20010930"
+
+static int cur_left_vol;
+static int cur_right_vol;
+static struct i2c_client *daca_client;
+
+static int daca_attach_adapter(struct i2c_adapter *adapter);
+static int daca_detect_client(struct i2c_adapter *adapter, int address);
+static int daca_detach_client(struct i2c_client *client);
+
+/* Unique ID allocation */
+static int daca_id;
+
+struct daca_data
+{
+	int arf; /* place holder for furture use */
+};
+
+struct i2c_driver daca_driver = {  
+	.owner			= THIS_MODULE,
+	.name			= "DAC3550A driver  V " DACA_VERSION,
+	.id			= I2C_DRIVERID_DACA,
+	.flags			= I2C_DF_NOTIFY,
+	.attach_adapter		= daca_attach_adapter,
+	.detach_client		= daca_detach_client,
+};
+
+#define VOL_MAX ((1<<20) - 1)
+
+void daca_get_volume(uint * left_vol, uint  *right_vol)
+{
+	*left_vol = cur_left_vol >> 5;
+	*right_vol = cur_right_vol >> 5;
+}
+
+int daca_set_volume(uint left_vol, uint right_vol)
+{
+	unsigned short voldata;
+  
+	if (!daca_client)
+		return -1;
+
+	/* Derived from experience, not from any specific values */
+	left_vol <<= 5;
+	right_vol <<= 5;
+
+	if (left_vol > VOL_MAX)
+		left_vol = VOL_MAX;
+	if (right_vol > VOL_MAX)
+		right_vol = VOL_MAX;
+
+	voldata = ((left_vol >> 14)  & 0x3f) << 8;
+	voldata |= (right_vol >> 14)  & 0x3f;
+  
+	if (i2c_smbus_write_word_data(daca_client, 2, voldata) < 0) {
+		printk("daca: failed to set volume \n");
+		return -1; 
+	}
+
+	cur_left_vol = left_vol;
+	cur_right_vol = right_vol;
+  
+	return 0;
+}
+
+int daca_leave_sleep(void)
+{
+	if (!daca_client)
+		return -1;
+  
+	/* Do a short sleep, just to make sure I2C bus is awake and paying
+	 * attention to us
+	 */
+	wait_ms(20);
+	/* Write the sample rate reg the value it needs */
+	i2c_smbus_write_byte_data(daca_client, 1, 8);
+	daca_set_volume(cur_left_vol >> 5, cur_right_vol >> 5);
+	/* Another short delay, just to make sure the other I2C bus writes
+	 * have taken...
+	 */
+	wait_ms(20);
+	/* Write the global config reg - invert right power amp,
+	 * DAC on, use 5-volt mode */
+	i2c_smbus_write_byte_data(daca_client, 3, 0x45);
+
+	return 0;
+}
+
+int daca_enter_sleep(void)
+{
+	if (!daca_client)
+		return -1;
+
+	i2c_smbus_write_byte_data(daca_client, 1, 8);
+	daca_set_volume(cur_left_vol >> 5, cur_right_vol >> 5);
+
+	/* Write the global config reg - invert right power amp,
+	 * DAC on, enter low-power mode, use 5-volt mode
+	 */
+	i2c_smbus_write_byte_data(daca_client, 3, 0x65);
+
+	return 0;
+}
+
+static int daca_attach_adapter(struct i2c_adapter *adapter)
+{
+	if (!strncmp(adapter->name, "mac-io", 6))
+		daca_detect_client(adapter, 0x4d);
+	return 0;
+}
+
+static int daca_init_client(struct i2c_client * new_client)
+{
+	/* 
+	 * Probe is not working with the current i2c-keywest
+	 * driver. We try to use addr 0x4d on each adapters
+	 * instead, by setting the format register.
+	 * 
+	 * FIXME: I'm sure that can be obtained from the
+	 * device-tree. --BenH.
+	 */
+  
+	/* Write the global config reg - invert right power amp,
+	 * DAC on, use 5-volt mode
+	 */
+	if (i2c_smbus_write_byte_data(new_client, 3, 0x45))
+		return -1;
+
+	i2c_smbus_write_byte_data(new_client, 1, 8);
+	daca_client = new_client;
+	daca_set_volume(15000, 15000);
+
+	return 0;
+}
+
+static int daca_detect_client(struct i2c_adapter *adapter, int address)
+{
+	const char *client_name = "DAC 3550A Digital Equalizer";
+	struct i2c_client *new_client;
+	struct daca_data *data;
+	int rc = -ENODEV;
+
+	new_client = kmalloc(sizeof(*new_client) + sizeof(*data), GFP_KERNEL);
+	if (!new_client)
+		return -ENOMEM;
+
+	new_client->addr = address;
+	new_client->adapter = adapter;
+	new_client->driver = &daca_driver;
+	new_client->flags = 0;
+	strcpy(new_client->name, client_name);
+	new_client->id = daca_id++; /* racy... */
+
+	data = (struct daca_data *)(new_client+1);
+	dev_set_drvdata(&new_client->dev, data);
+
+	if (daca_init_client(new_client))
+		goto bail;
+
+	/* Tell the i2c layer a new client has arrived */
+	if (i2c_attach_client(new_client))
+		goto bail;
+
+	return 0;
+ bail:
+	kfree(new_client);
+	return rc;
+}
+
+
+static int daca_detach_client(struct i2c_client *client)
+{
+	if (client == daca_client)
+		daca_client = NULL;
+
+  	i2c_detach_client(client);
+	kfree(client);
+	return 0;
+}
+
+void daca_cleanup(void)
+{
+	i2c_del_driver(&daca_driver);
+}
+
+int daca_init(void)
+{
+	printk("dac3550a driver version %s (%s)\n",DACA_VERSION,DACA_DATE);
+	return i2c_add_driver(&daca_driver);
+}

sound/oss/dmasound/tas3001c.h

+/*
+ * Header file for the i2c/i2s based TA3001c sound chip used
+ * on some Apple hardware. Also known as "tumbler".
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive
+ *  for more details.
+ *
+ * Written by Christopher C. Chimelis <chris@debian.org>
+ */
+
+#ifndef _TAS3001C_H_
+#define _TAS3001C_H_
+
+#include <linux/types.h>
+
+#include "tas_common.h"
+#include "tas_eq_prefs.h"
+
+/*
+ * Macros that correspond to the registers that we write to
+ * when setting the various values.
+ */
+
+#define TAS3001C_VERSION	"0.3"
+#define TAS3001C_DATE	        "20011214"
+
+#define I2C_DRIVERNAME_TAS3001C "TAS3001c driver V " TAS3001C_VERSION
+#define I2C_DRIVERID_TAS3001C   (I2C_DRIVERID_TAS_BASE+0)
+
+extern  struct tas_driver_hooks_t tas3001c_hooks;
+extern struct tas_gain_t tas3001c_gain;
+extern struct tas_eq_pref_t *tas3001c_eq_prefs[];
+
+enum tas3001c_reg_t {
+  TAS3001C_REG_MCR                    = 0x01,
+  TAS3001C_REG_DRC                    = 0x02,
+
+  TAS3001C_REG_VOLUME                 = 0x04,
+  TAS3001C_REG_TREBLE                 = 0x05,
+  TAS3001C_REG_BASS                   = 0x06,
+  TAS3001C_REG_MIXER1                 = 0x07,
+  TAS3001C_REG_MIXER2                 = 0x08,
+
+  TAS3001C_REG_LEFT_BIQUAD0           = 0x0a,
+  TAS3001C_REG_LEFT_BIQUAD1           = 0x0b,
+  TAS3001C_REG_LEFT_BIQUAD2           = 0x0c,
+  TAS3001C_REG_LEFT_BIQUAD3           = 0x0d,
+  TAS3001C_REG_LEFT_BIQUAD4           = 0x0e,
+  TAS3001C_REG_LEFT_BIQUAD5           = 0x0f,
+  TAS3001C_REG_LEFT_BIQUAD6           = 0x10,
+  
+  TAS3001C_REG_RIGHT_BIQUAD0          = 0x13,
+  TAS3001C_REG_RIGHT_BIQUAD1          = 0x14,
+  TAS3001C_REG_RIGHT_BIQUAD2          = 0x15,
+  TAS3001C_REG_RIGHT_BIQUAD3          = 0x16,
+  TAS3001C_REG_RIGHT_BIQUAD4          = 0x17,
+  TAS3001C_REG_RIGHT_BIQUAD5          = 0x18,
+  TAS3001C_REG_RIGHT_BIQUAD6          = 0x19,
+
+  TAS3001C_REG_MAX                    = 0x20
+};
+
+#endif /* _TAS3001C_H_ */

sound/oss/dmasound/tas3004.h

+/*
+ * Header file for the i2c/i2s based TA3004 sound chip used
+ * on some Apple hardware. Also known as "tumbler".
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive
+ *  for more details.
+ *
+ * Written by Christopher C. Chimelis <chris@debian.org>
+ */
+
+#ifndef _TAS3004_H_
+#define _TAS3004_H_
+
+#include <linux/types.h>
+
+#include "tas_common.h"
+#include "tas_eq_prefs.h"
+
+/*
+ * Macros that correspond to the registers that we write to
+ * when setting the various values.
+ */
+
+#define TAS3004_VERSION	        "0.3"
+#define TAS3004_DATE	        "20011214"
+
+#define I2C_DRIVERNAME_TAS3004 "TAS3004 driver V " TAS3004_VERSION
+#define I2C_DRIVERID_TAS3004    (I2C_DRIVERID_TAS_BASE+1)
+
+extern  struct tas_driver_hooks_t tas3004_hooks;
+extern struct tas_gain_t tas3004_gain;
+extern struct tas_eq_pref_t *tas3004_eq_prefs[];
+
+enum tas3004_reg_t {
+  TAS3004_REG_MCR                    = 0x01,
+  TAS3004_REG_DRC                    = 0x02,
+
+  TAS3004_REG_VOLUME                 = 0x04,
+  TAS3004_REG_TREBLE                 = 0x05,
+  TAS3004_REG_BASS                   = 0x06,
+  TAS3004_REG_LEFT_MIXER             = 0x07,
+  TAS3004_REG_RIGHT_MIXER            = 0x08,
+
+  TAS3004_REG_LEFT_BIQUAD0           = 0x0a,
+  TAS3004_REG_LEFT_BIQUAD1           = 0x0b,
+  TAS3004_REG_LEFT_BIQUAD2           = 0x0c,
+  TAS3004_REG_LEFT_BIQUAD3           = 0x0d,
+  TAS3004_REG_LEFT_BIQUAD4           = 0x0e,
+  TAS3004_REG_LEFT_BIQUAD5           = 0x0f,
+  TAS3004_REG_LEFT_BIQUAD6           = 0x10,
+  
+  TAS3004_REG_RIGHT_BIQUAD0          = 0x13,
+  TAS3004_REG_RIGHT_BIQUAD1          = 0x14,
+  TAS3004_REG_RIGHT_BIQUAD2          = 0x15,
+  TAS3004_REG_RIGHT_BIQUAD3          = 0x16,
+  TAS3004_REG_RIGHT_BIQUAD4          = 0x17,
+  TAS3004_REG_RIGHT_BIQUAD5          = 0x18,
+  TAS3004_REG_RIGHT_BIQUAD6          = 0x19,
+
+  TAS3004_REG_LEFT_LOUD_BIQUAD       = 0x21,
+  TAS3004_REG_RIGHT_LOUD_BIQUAD      = 0x22,
+
+  TAS3004_REG_LEFT_LOUD_BIQUAD_GAIN  = 0x23,
+  TAS3004_REG_RIGHT_LOUD_BIQUAD_GAIN = 0x24,
+
+  TAS3004_REG_TEST                   = 0x29,
+
+  TAS3004_REG_ANALOG_CTRL            = 0x40,
+  TAS3004_REG_TEST1                  = 0x41,
+  TAS3004_REG_TEST2                  = 0x42,
+  TAS3004_REG_MCR2                   = 0x43,
+
+  TAS3004_REG_MAX                    = 0x44
+};
+
+#endif /* _TAS3004_H_ */

sound/oss/dmasound/tas_common.c

+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/sysctl.h>
+#include <linux/types.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/soundcard.h>
+#include <asm/uaccess.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+
+#include "tas_common.h"
+
+#define CALL0(proc)								\
+	do {									\
+		struct tas_data_t *self;					\
+		if (!tas_client || driver_hooks == NULL)			\
+			return -1;						\
+		self = dev_get_drvdata(&tas_client->dev);			\
+		if (driver_hooks->proc)						\
+			return driver_hooks->proc(self);			\
+		else								\
+			return -EINVAL;						\
+	} while (0)
+
+#define CALL(proc,arg...)							\
+	do {									\
+		struct tas_data_t *self;					\
+		if (!tas_client || driver_hooks == NULL)			\
+			return -1;						\
+		self = dev_get_drvdata(&tas_client->dev);			\
+		if (driver_hooks->proc)						\
+			return driver_hooks->proc(self, ## arg);		\
+		else								\
+			return -EINVAL;						\
+	} while (0)
+
+
+static u8 tas_i2c_address = 0x34;
+static struct i2c_client *tas_client;
+static struct device_node* tas_node;
+
+static int tas_attach_adapter(struct i2c_adapter *);
+static int tas_detach_client(struct i2c_client *);
+
+struct i2c_driver tas_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "tas",
+	.flags		= I2C_DF_NOTIFY,
+	.attach_adapter	= tas_attach_adapter,
+	.detach_client	= tas_detach_client,
+};
+
+struct tas_driver_hooks_t *driver_hooks;
+
+int
+tas_register_driver(struct tas_driver_hooks_t *hooks)
+{
+	driver_hooks = hooks;
+	return 0;
+}
+
+int
+tas_get_mixer_level(int mixer, uint *level)
+{
+	CALL(get_mixer_level,mixer,level);
+}
+
+int
+tas_set_mixer_level(int mixer,uint level)
+{
+	CALL(set_mixer_level,mixer,level);
+}
+
+int
+tas_enter_sleep(void)
+{
+	CALL0(enter_sleep);
+}
+
+int
+tas_leave_sleep(void)
+{
+	CALL0(leave_sleep);
+}
+
+int
+tas_supported_mixers(void)
+{
+	CALL0(supported_mixers);
+}
+
+int
+tas_mixer_is_stereo(int mixer)
+{
+	CALL(mixer_is_stereo,mixer);
+}
+
+int
+tas_stereo_mixers(void)
+{
+	CALL0(stereo_mixers);
+}
+
+int
+tas_output_device_change(int device_id,int layout_id,int speaker_id)
+{
+	CALL(output_device_change,device_id,layout_id,speaker_id);
+}
+
+int
+tas_device_ioctl(u_int cmd, u_long arg)
+{
+	CALL(device_ioctl,cmd,arg);
+}
+
+int
+tas_post_init(void)
+{
+	CALL0(post_init);
+}
+
+static int
+tas_detect_client(struct i2c_adapter *adapter, int address)
+{
+	static const char *client_name = "tas Digital Equalizer";
+	struct i2c_client *new_client;
+	int rc = -ENODEV;
+
+	if (!driver_hooks) {
+		printk(KERN_ERR "tas_detect_client called with no hooks !\n");
+		return -ENODEV;
+	}
+	
+	new_client = kmalloc(sizeof(*new_client), GFP_KERNEL);
+	if (!new_client)
+		return -ENOMEM;
+	memset(new_client, 0, sizeof(*new_client));
+
+	new_client->addr = address;
+	new_client->adapter = adapter;
+	new_client->driver = &tas_driver;
+	strlcpy(new_client->name, client_name, DEVICE_NAME_SIZE);
+
+        if (driver_hooks->init(new_client))
+		goto bail;
+
+	/* Tell the i2c layer a new client has arrived */
+	if (i2c_attach_client(new_client)) {
+		driver_hooks->uninit(dev_get_drvdata(&new_client->dev));
+		goto bail;
+	}
+
+	tas_client = new_client;
+	return 0;
+ bail:
+	tas_client = NULL;
+	kfree(new_client);
+	return rc;
+}
+
+static int
+tas_attach_adapter(struct i2c_adapter *adapter)
+{
+	if (!strncmp(adapter->name, "mac-io", 6))
+		return tas_detect_client(adapter, tas_i2c_address);
+	return 0;
+}
+
+static int
+tas_detach_client(struct i2c_client *client)
+{
+	if (client == tas_client) {
+		driver_hooks->uninit(dev_get_drvdata(&client->dev));
+
+		i2c_detach_client(client);
+		kfree(client);
+	}
+	return 0;
+}
+
+void
+tas_cleanup(void)
+{
+	i2c_del_driver(&tas_driver);
+}
+
+int __init
+tas_init(int driver_id, const char *driver_name)
+{
+	u32* paddr;
+
+	printk(KERN_INFO "tas driver [%s])\n", driver_name);
+
+	tas_node = find_devices("deq");
+	if (tas_node == NULL)
+		return -ENODEV;
+	paddr = (u32 *)get_property(tas_node, "i2c-address", NULL);
+	if (paddr) {
+		tas_i2c_address = (*paddr) >> 1;
+		printk(KERN_INFO "using i2c address: 0x%x from device-tree\n",
+				tas_i2c_address);
+	} else    
+		printk(KERN_INFO "using i2c address: 0x%x (default)\n",
+				tas_i2c_address);
+
+	return i2c_add_driver(&tas_driver);
+}

sound/oss/dmasound/tas_common.h

+#ifndef _TAS_COMMON_H_
+#define _TAS_COMMON_H_
+
+#include <linux/i2c.h>
+#include <linux/soundcard.h>
+#include <asm/string.h>
+
+#define I2C_DRIVERID_TAS_BASE   (0xFEBA)
+
+#define SET_4_20(shadow, offset, val)                        \
+	do {                                                 \
+		(shadow)[(offset)+0] = ((val) >> 16) & 0xff; \
+		(shadow)[(offset)+1] = ((val) >> 8)  & 0xff; \
+		(shadow)[(offset)+2] = ((val) >> 0)  & 0xff; \
+	} while (0)
+
+#define GET_4_20(shadow, offset)                             \
+	(((u_int)((shadow)[(offset)+0]) << 16) |             \
+	 ((u_int)((shadow)[(offset)+1]) <<  8) |             \
+	 ((u_int)((shadow)[(offset)+2]) <<  0))
+
+
+#define TAS_BIQUAD_FAST_LOAD 0x01
+
+#define TAS_DRCE_ENABLE           0x01
+#define TAS_DRCE_ABOVE_RATIO      0x02
+#define TAS_DRCE_BELOW_RATIO      0x04
+#define TAS_DRCE_THRESHOLD        0x08
+#define TAS_DRCE_ENERGY           0x10
+#define TAS_DRCE_ATTACK           0x20
+#define TAS_DRCE_DECAY            0x40
+
+#define TAS_DRCE_ALL              0x7f
+
+
+#define TAS_OUTPUT_HEADPHONES     0x00
+#define TAS_OUTPUT_INTERNAL_SPKR  0x01
+#define TAS_OUTPUT_EXTERNAL_SPKR  0x02
+
+
+union tas_biquad_t {
+	struct {
+		int b0,b1,b2,a1,a2;
+	} coeff;
+	int buf[5];
+};
+
+struct tas_biquad_ctrl_t {
+	u_int channel:4;
+	u_int filter:4;
+
+	union tas_biquad_t data;
+};
+
+struct tas_biquad_ctrl_list_t {
+	int flags;
+	int filter_count;
+	struct tas_biquad_ctrl_t biquads[0];
+};
+
+struct tas_ratio_t {
+	unsigned short val;    /* 8.8                        */
+	unsigned short expand; /* 0 = compress, !0 = expand. */
+};
+
+struct tas_drce_t {
+	unsigned short enable;
+	struct tas_ratio_t above;
+	struct tas_ratio_t below;
+	short threshold;       /* dB,       8.8 signed    */
+	unsigned short energy; /* seconds,  4.12 unsigned */
+	unsigned short attack; /* seconds,  4.12 unsigned */
+	unsigned short decay;  /* seconds,  4.12 unsigned */
+};
+
+struct tas_drce_ctrl_t {
+	uint flags;
+
+	struct tas_drce_t data;
+};
+
+struct tas_gain_t
+{
+  unsigned int *master;
+  unsigned int *treble;
+  unsigned int *bass;
+  unsigned int *mixer;
+};
+
+typedef char tas_shadow_t[16];
+
+struct tas_data_t
+{
+	struct i2c_client *client;
+	tas_shadow_t *shadow;
+	uint mixer[SOUND_MIXER_NRDEVICES];
+};
+
+typedef int (*tas_hook_init_t)(struct i2c_client *);
+typedef int (*tas_hook_post_init_t)(struct tas_data_t *);
+typedef void (*tas_hook_uninit_t)(struct tas_data_t *);
+
+typedef int (*tas_hook_get_mixer_level_t)(struct tas_data_t *,int,uint *);
+typedef int (*tas_hook_set_mixer_level_t)(struct tas_data_t *,int,uint);
+
+typedef int (*tas_hook_enter_sleep_t)(struct tas_data_t *);
+typedef int (*tas_hook_leave_sleep_t)(struct tas_data_t *);
+
+typedef int (*tas_hook_supported_mixers_t)(struct tas_data_t *);
+typedef int (*tas_hook_mixer_is_stereo_t)(struct tas_data_t *,int);
+typedef int (*tas_hook_stereo_mixers_t)(struct tas_data_t *);
+
+typedef int (*tas_hook_output_device_change_t)(struct tas_data_t *,int,int,int);
+typedef int (*tas_hook_device_ioctl_t)(struct tas_data_t *,u_int,u_long);
+
+struct tas_driver_hooks_t {
+	/*
+	 * All hardware initialisation must be performed in
+	 * post_init(), as tas_dmasound_init() does a hardware reset.
+	 *
+	 * init() is called before tas_dmasound_init() so that
+	 * ouput_device_change() is always called after i2c driver
+	 * initialisation. The implication is that
+	 * output_device_change() must cope with the fact that it
+	 * may be called before post_init().
+	 */
+
+	tas_hook_init_t                   init;
+	tas_hook_post_init_t              post_init;
+	tas_hook_uninit_t                 uninit;
+
+	tas_hook_get_mixer_level_t        get_mixer_level;
+	tas_hook_set_mixer_level_t        set_mixer_level;
+
+	tas_hook_enter_sleep_t            enter_sleep;
+	tas_hook_leave_sleep_t            leave_sleep;
+
+	tas_hook_supported_mixers_t       supported_mixers;
+	tas_hook_mixer_is_stereo_t        mixer_is_stereo;
+	tas_hook_stereo_mixers_t          stereo_mixers;
+
+	tas_hook_output_device_change_t   output_device_change;
+	tas_hook_device_ioctl_t           device_ioctl;
+};
+
+enum tas_write_mode_t {
+	WRITE_HW     = 0x01,
+	WRITE_SHADOW = 0x02,
+	WRITE_NORMAL = 0x03,
+	FORCE_WRITE  = 0x04
+};
+
+static inline uint
+tas_mono_to_stereo(uint mono)
+{
+	mono &=0xff;
+	return mono | (mono<<8);
+}
+
+/*
+ * Todo: make these functions a bit more efficient !
+ */
+static inline int
+tas_write_register(	struct tas_data_t *self,
+			uint reg_num,
+			uint reg_width,
+			char *data,
+			uint write_mode)
+{
+	int rc;
+
+	if (reg_width==0 || data==NULL || self==NULL)
+		return -EINVAL;
+	if (!(write_mode & FORCE_WRITE) &&
+	    !memcmp(data,self->shadow[reg_num],reg_width))
+	    	return 0;
+
+	if (write_mode & WRITE_SHADOW)
+		memcpy(self->shadow[reg_num],data,reg_width);
+	if (write_mode & WRITE_HW) {
+		rc=i2c_smbus_write_block_data(self->client,
+					      reg_num,
+					      reg_width,
+					      data);
+		if (rc < 0) {
+			printk("tas: I2C block write failed \n");  
+			return rc; 
+		}
+	}
+	return 0;
+}
+
+static inline int
+tas_sync_register(	struct tas_data_t *self,
+			uint reg_num,
+			uint reg_width)
+{
+	int rc;
+
+	if (reg_width==0 || self==NULL)
+		return -EINVAL;
+	rc=i2c_smbus_write_block_data(self->client,
+				      reg_num,
+				      reg_width,
+				      self->shadow[reg_num]);
+	if (rc < 0) {
+		printk("tas: I2C block write failed \n");
+		return rc;
+	}
+	return 0;
+}
+
+static inline int
+tas_write_byte_register(	struct tas_data_t *self,
+				uint reg_num,
+				char data,
+				uint write_mode)
+{
+	if (self==NULL)
+		return -1;
+	if (!(write_mode & FORCE_WRITE) && data != self->shadow[reg_num][0])
+		return 0;
+	if (write_mode & WRITE_SHADOW)
+		self->shadow[reg_num][0]=data;
+	if (write_mode & WRITE_HW) {
+		if (i2c_smbus_write_byte_data(self->client, reg_num, data) < 0) {
+			printk("tas: I2C byte write failed \n");  
+			return -1; 
+		}
+	}
+	return 0;
+}
+
+static inline int
+tas_sync_byte_register(	struct tas_data_t *self,
+			uint reg_num,
+			uint reg_width)
+{
+	if (reg_width==0 || self==NULL)
+		return -1;
+	if (i2c_smbus_write_byte_data(
+	    self->client, reg_num, self->shadow[reg_num][0]) < 0) {
+		printk("tas: I2C byte write failed \n");
+		return -1;
+	}
+	return 0;
+}
+
+static inline int
+tas_read_register(	struct tas_data_t *self,
+			uint reg_num,
+			uint reg_width,
+			char *data)
+{
+	if (reg_width==0 || data==NULL || self==NULL)
+		return -1;
+	memcpy(data,self->shadow[reg_num],reg_width);
+	return 0;
+}
+
+extern int tas_register_driver(struct tas_driver_hooks_t *hooks);
+
+extern int tas_get_mixer_level(int mixer,uint *level);
+extern int tas_set_mixer_level(int mixer,uint level);
+extern int tas_enter_sleep(void);
+extern int tas_leave_sleep(void);
+extern int tas_supported_mixers(void);
+extern int tas_mixer_is_stereo(int mixer);
+extern int tas_stereo_mixers(void);
+extern int tas_output_device_change(int,int,int);
+extern int tas_device_ioctl(u_int, u_long);
+
+extern void tas_cleanup(void);
+extern int tas_init(int driver_id,const char *driver_name);
+extern int tas_post_init(void);
+
+#endif /* _TAS_COMMON_H_ */
+/*
+ * Local Variables:
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * c-basic-offset: 8
+ * End:
+ */

sound/oss/dmasound/tas_eq_prefs.h

+#ifndef _TAS_EQ_PREFS_H_
+#define _TAS_EQ_PREFS_H_
+
+struct tas_eq_pref_t {
+	u_int sample_rate;
+	u_int device_id;
+	u_int output_id;
+	u_int speaker_id;
+
+	struct tas_drce_t *drce;
+
+	u_int filter_count;
+	struct tas_biquad_ctrl_t *biquads;
+};
+
+#endif /* _TAS_EQ_PREFS_H_ */
+
+/*
+ * Local Variables:
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * c-basic-offset: 8
+ * End:
+ */

sound/oss/dmasound/tas_ioctl.h

+#ifndef _TAS_IOCTL_H_
+#define _TAS_IOCTL_H_
+
+#include <linux/i2c.h>
+#include <linux/soundcard.h>
+
+
+#define TAS_READ_EQ              _SIOR('t',0,struct tas_biquad_ctrl_t)
+#define TAS_WRITE_EQ             _SIOW('t',0,struct tas_biquad_ctrl_t)
+
+#define TAS_READ_EQ_LIST         _SIOR('t',1,struct tas_biquad_ctrl_t)
+#define TAS_WRITE_EQ_LIST        _SIOW('t',1,struct tas_biquad_ctrl_t)
+
+#define TAS_READ_EQ_FILTER_COUNT  _SIOR('t',2,int)
+#define TAS_READ_EQ_CHANNEL_COUNT _SIOR('t',3,int)
+
+#define TAS_READ_DRCE            _SIOR('t',4,struct tas_drce_ctrl_t)
+#define TAS_WRITE_DRCE           _SIOW('t',4,struct tas_drce_ctrl_t)
+
+#define TAS_READ_DRCE_CAPS       _SIOR('t',5,int)
+#define TAS_READ_DRCE_MIN        _SIOR('t',6,int)
+#define TAS_READ_DRCE_MAX        _SIOR('t',7,int)
+
+#endif