Merge branch 'master' of ssh://git.drumgizmo.org:666/meta-drumgizmo

6 files changed, 1653 insertions, 0 deletions

diff --git a/recipes-kernel/spiaudio-module/files/COPYING b/recipes-kernel/spiaudio-module/files/COPYING
new file mode 100644
index 0000000..6d45519
--- /dev/null
+++ b/recipes-kernel/spiaudio-module/files/COPYING
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/recipes-kernel/spiaudio-module/files/Makefile b/recipes-kernel/spiaudio-module/files/Makefile
new file mode 100644
index 0000000..851971b
--- /dev/null
+++ b/recipes-kernel/spiaudio-module/files/Makefile
@@ -0,0 +1,14 @@
+obj-m := at73c213_.o
+
+SRC := $(shell pwd)
+
+all:
+	$(MAKE) -C $(KERNEL_SRC) M=$(SRC)
+
+modules_install:
+	$(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install
+
+clean:
+	rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
+	rm -f Module.markers Module.symvers modules.order
+	rm -rf .tmp_versions Modules.symvers
diff --git a/recipes-kernel/spiaudio-module/files/at73c213.h b/recipes-kernel/spiaudio-module/files/at73c213.h
new file mode 100644
index 0000000..fd8b372
--- /dev/null
+++ b/recipes-kernel/spiaudio-module/files/at73c213.h
@@ -0,0 +1,119 @@
+/*
+ * Driver for the AT73C213 16-bit stereo DAC on Atmel ATSTK1000
+ *
+ * Copyright (C) 2006 - 2007 Atmel Corporation
+ *
+ * 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.
+ *
+ * The full GNU General Public License is included in this
+ * distribution in the file called COPYING.
+ */
+
+#ifndef _SND_AT73C213_H
+#define _SND_AT73C213_H
+
+/* DAC control register */
+#define DAC_CTRL		0x00
+#define DAC_CTRL_ONPADRV	7
+#define DAC_CTRL_ONAUXIN	6
+#define DAC_CTRL_ONDACR		5
+#define DAC_CTRL_ONDACL		4
+#define DAC_CTRL_ONLNOR		3
+#define DAC_CTRL_ONLNOL		2
+#define DAC_CTRL_ONLNIR		1
+#define DAC_CTRL_ONLNIL		0
+
+/* DAC left line in gain register */
+#define DAC_LLIG		0x01
+#define DAC_LLIG_LLIG		0
+
+/* DAC right line in gain register */
+#define DAC_RLIG		0x02
+#define DAC_RLIG_RLIG		0
+
+/* DAC Left Master Playback Gain Register */
+#define DAC_LMPG		0x03
+#define DAC_LMPG_LMPG		0
+
+/* DAC Right Master Playback Gain Register */
+#define DAC_RMPG		0x04
+#define DAC_RMPG_RMPG		0
+
+/* DAC Left Line Out Gain Register */
+#define DAC_LLOG		0x05
+#define DAC_LLOG_LLOG		0
+
+/* DAC Right Line Out Gain Register */
+#define DAC_RLOG		0x06
+#define DAC_RLOG_RLOG		0
+
+/* DAC Output Level Control Register */
+#define DAC_OLC			0x07
+#define DAC_OLC_RSHORT		7
+#define DAC_OLC_ROLC		4
+#define DAC_OLC_LSHORT		3
+#define DAC_OLC_LOLC		0
+
+/* DAC Mixer Control Register */
+#define DAC_MC			0x08
+#define DAC_MC_INVR		5
+#define DAC_MC_INVL		4
+#define DAC_MC_RMSMIN2		3
+#define DAC_MC_RMSMIN1		2
+#define DAC_MC_LMSMIN2		1
+#define DAC_MC_LMSMIN1		0
+
+/* DAC Clock and Sampling Frequency Control Register */
+#define DAC_CSFC		0x09
+#define DAC_CSFC_OVRSEL		4
+
+/* DAC Miscellaneous Register */
+#define DAC_MISC		0x0A
+#define DAC_MISC_VCMCAPSEL	7
+#define DAC_MISC_DINTSEL	4
+#define DAC_MISC_DITHEN		3
+#define DAC_MISC_DEEMPEN	2
+#define DAC_MISC_NBITS		0
+
+/* DAC Precharge Control Register */
+#define DAC_PRECH		0x0C
+#define DAC_PRECH_PRCHGPDRV	7
+#define DAC_PRECH_PRCHGAUX1	6
+#define DAC_PRECH_PRCHGLNOR	5
+#define DAC_PRECH_PRCHGLNOL	4
+#define DAC_PRECH_PRCHGLNIR	3
+#define DAC_PRECH_PRCHGLNIL	2
+#define DAC_PRECH_PRCHG		1
+#define DAC_PRECH_ONMSTR	0
+
+/* DAC Auxiliary Input Gain Control Register */
+#define DAC_AUXG		0x0D
+#define DAC_AUXG_AUXG		0
+
+/* DAC Reset Register */
+#define DAC_RST			0x10
+#define DAC_RST_RESMASK		2
+#define DAC_RST_RESFILZ		1
+#define DAC_RST_RSTZ		0
+
+/* Power Amplifier Control Register */
+#define PA_CTRL			0x11
+#define PA_CTRL_APAON		6
+#define PA_CTRL_APAPRECH	5
+#define PA_CTRL_APALP		4
+#define PA_CTRL_APAGAIN		0
+
+#endif /* _SND_AT73C213_H */
diff --git a/recipes-kernel/spiaudio-module/files/at73c213_.c b/recipes-kernel/spiaudio-module/files/at73c213_.c
new file mode 100644
index 0000000..d2abb1f
--- /dev/null
+++ b/recipes-kernel/spiaudio-module/files/at73c213_.c
@@ -0,0 +1,1131 @@
+/*
+ * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
+ *
+ * Copyright (C) 2006-2007 Atmel Norway
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+/*#define DEBUG*/
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <sound/initval.h>
+#include <sound/control.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include <linux/atmel-ssc.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/at73c213.h>
+
+#include "at73c213.h"
+#define CONFIG_SND_AT73C213_TARGET_BITRATE 10000
+#define BITRATE_MIN	 8000 /* Hardware limit? */
+#define BITRATE_TARGET	CONFIG_SND_AT73C213_TARGET_BITRATE
+#define BITRATE_MAX	50000 /* Hardware limit. */
+
+/* Initial (hardware reset) AT73C213 register values. */
+static u8 snd_at73c213_original_image[18] =
+{
+	0x00,	/* 00 - CTRL    */
+	0x05,	/* 01 - LLIG    */
+	0x05,	/* 02 - RLIG    */
+	0x08,	/* 03 - LPMG    */
+	0x08,	/* 04 - RPMG    */
+	0x00,	/* 05 - LLOG    */
+	0x00,	/* 06 - RLOG    */
+	0x22,	/* 07 - OLC     */
+	0x09,	/* 08 - MC      */
+	0x00,	/* 09 - CSFC    */
+	0x00,	/* 0A - MISC    */
+	0x00,	/* 0B -         */
+	0x00,	/* 0C - PRECH   */
+	0x05,	/* 0D - AUXG    */
+	0x00,	/* 0E -         */
+	0x00,	/* 0F -         */
+	0x00,	/* 10 - RST     */
+	0x00,	/* 11 - PA_CTRL */
+};
+
+struct snd_at73c213 {
+	struct snd_card			*card;
+	struct snd_pcm			*pcm;
+	struct snd_pcm_substream	*substream;
+	struct at73c213_board_info	*board;
+	int				irq;
+	int				period;
+	unsigned long			bitrate;
+	struct ssc_device		*ssc;
+	struct spi_device		*spi;
+	u8				spi_wbuffer[2];
+	u8				spi_rbuffer[2];
+	/* Image of the SPI registers in AT73C213. */
+	u8				reg_image[18];
+	/* Protect SSC registers against concurrent access. */
+	spinlock_t			lock;
+	/* Protect mixer registers against concurrent access. */
+	struct mutex			mixer_lock;
+};
+
+#define get_chip(card) ((struct snd_at73c213 *)card->private_data)
+
+static int
+snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
+{
+	struct spi_message msg;
+	struct spi_transfer msg_xfer = {
+		.len		= 2,
+		.cs_change	= 0,
+	};
+	int retval;
+
+	spi_message_init(&msg);
+
+	chip->spi_wbuffer[0] = reg;
+	chip->spi_wbuffer[1] = val;
+
+	msg_xfer.tx_buf = chip->spi_wbuffer;
+	msg_xfer.rx_buf = chip->spi_rbuffer;
+	spi_message_add_tail(&msg_xfer, &msg);
+
+	retval = spi_sync(chip->spi, &msg);
+
+	if (!retval)
+		chip->reg_image[reg] = val;
+
+	return retval;
+}
+
+static struct snd_pcm_hardware snd_at73c213_playback_hw = {
+	.info		= SNDRV_PCM_INFO_INTERLEAVED |
+			  SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.formats	= SNDRV_PCM_FMTBIT_S16_BE,
+	.rates		= SNDRV_PCM_RATE_CONTINUOUS,
+	.rate_min	= 8000,  /* Replaced by chip->bitrate later. */
+	.rate_max	= 50000, /* Replaced by chip->bitrate later. */
+	.channels_min	= 1,
+	.channels_max	= 2,
+	.buffer_bytes_max = 64 * 1024 - 1,
+	.period_bytes_min = 512,
+	.period_bytes_max = 64 * 1024 - 1,
+	.periods_min	= 4,
+	.periods_max	= 1024,
+};
+
+/*
+ * Calculate and set bitrate and divisions.
+ */
+static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
+{
+	unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
+	unsigned long dac_rate_new, ssc_div;
+	int status;
+	unsigned long ssc_div_max, ssc_div_min;
+	int max_tries;
+
+	/*
+	 * We connect two clocks here, picking divisors so the I2S clocks
+	 * out data at the same rate the DAC clocks it in ... and as close
+	 * as practical to the desired target rate.
+	 *
+	 * The DAC master clock (MCLK) is programmable, and is either 256
+	 * or (not here) 384 times the I2S output clock (BCLK).
+	 */
+
+	/* SSC clock / (bitrate * stereo * 16-bit). */
+	ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
+	ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
+	ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
+	max_tries = (ssc_div_max - ssc_div_min) / 2;
+
+	if (max_tries < 1)
+		max_tries = 1;
+
+	/* ssc_div must be even. */
+	ssc_div = (ssc_div + 1) & ~1UL;
+
+	if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
+		ssc_div -= 2;
+		if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
+			return -ENXIO;
+	}
+
+	/* Search for a possible bitrate. */
+	do {
+		/* SSC clock / (ssc divider * 16-bit * stereo). */
+		if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
+			return -ENXIO;
+
+		/* 256 / (2 * 16) = 8 */
+		dac_rate_new = 8 * (ssc_rate / ssc_div);
+
+		status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
+		if (status <= 0)
+			return status;
+
+		/* Ignore difference smaller than 256 Hz. */
+		if ((status/256) == (dac_rate_new/256))
+			goto set_rate;
+
+		ssc_div += 2;
+	} while (--max_tries);
+
+	/* Not able to find a valid bitrate. */
+	return -ENXIO;
+
+set_rate:
+	status = clk_set_rate(chip->board->dac_clk, status);
+	if (status < 0)
+		return status;
+
+	/* Set divider in SSC device. */
+	ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
+
+	/* SSC clock / (ssc divider * 16-bit * stereo). */
+	chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
+
+	dev_info(&chip->spi->dev,
+			"at73c213: supported bitrate is %lu (%lu divider)\n",
+			chip->bitrate, ssc_div);
+
+	return 0;
+}
+
+static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int err;
+
+	/* ensure buffer_size is a multiple of period_size */
+	err = snd_pcm_hw_constraint_integer(runtime,
+					SNDRV_PCM_HW_PARAM_PERIODS);
+	if (err < 0)
+		return err;
+	snd_at73c213_playback_hw.rate_min = chip->bitrate;
+	snd_at73c213_playback_hw.rate_max = chip->bitrate;
+	runtime->hw = snd_at73c213_playback_hw;
+	chip->substream = substream;
+
+	clk_enable(chip->ssc->clk);
+
+	return 0;
+}
+
+static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	chip->substream = NULL;
+	clk_disable(chip->ssc->clk);
+	return 0;
+}
+
+static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	int channels = params_channels(hw_params);
+	int val;
+
+	val = ssc_readl(chip->ssc->regs, TFMR);
+	val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
+	ssc_writel(chip->ssc->regs, TFMR, val);
+
+	return snd_pcm_lib_malloc_pages(substream,
+					params_buffer_bytes(hw_params));
+}
+
+static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int block_size;
+
+	block_size = frames_to_bytes(runtime, runtime->period_size);
+
+	chip->period = 0;
+
+	ssc_writel(chip->ssc->regs, PDC_TPR,
+			(long)runtime->dma_addr);
+	ssc_writel(chip->ssc->regs, PDC_TCR,
+			runtime->period_size * runtime->channels);
+	ssc_writel(chip->ssc->regs, PDC_TNPR,
+			(long)runtime->dma_addr + block_size);
+	ssc_writel(chip->ssc->regs, PDC_TNCR,
+			runtime->period_size * runtime->channels);
+
+	return 0;
+}
+
+static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
+				   int cmd)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	int retval = 0;
+
+	spin_lock(&chip->lock);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
+		ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
+		ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
+		break;
+	default:
+		dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
+		retval = -EINVAL;
+		break;
+	}
+
+	spin_unlock(&chip->lock);
+
+	return retval;
+}
+
+static snd_pcm_uframes_t
+snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	snd_pcm_uframes_t pos;
+	unsigned long bytes;
+
+	bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
+		- (unsigned long)runtime->dma_addr;
+
+	pos = bytes_to_frames(runtime, bytes);
+	if (pos >= runtime->buffer_size)
+		pos -= runtime->buffer_size;
+
+	return pos;
+}
+
+static const struct snd_pcm_ops at73c213_playback_ops = {
+	.open		= snd_at73c213_pcm_open,
+	.close		= snd_at73c213_pcm_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= snd_at73c213_pcm_hw_params,
+	.hw_free	= snd_at73c213_pcm_hw_free,
+	.prepare	= snd_at73c213_pcm_prepare,
+	.trigger	= snd_at73c213_pcm_trigger,
+	.pointer	= snd_at73c213_pcm_pointer,
+};
+
+static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
+{
+	struct snd_pcm *pcm;
+	int retval;
+
+	retval = snd_pcm_new(chip->card, chip->card->shortname,
+			device, 1, 0, &pcm);
+	if (retval < 0)
+		goto out;
+
+	pcm->private_data = chip;
+	pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
+	strcpy(pcm->name, "at73c213");
+	chip->pcm = pcm;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
+
+	retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
+			SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
+			64 * 1024, 64 * 1024);
+out:
+	return retval;
+}
+
+static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
+{
+	struct snd_at73c213 *chip = dev_id;
+	struct snd_pcm_runtime *runtime = chip->substream->runtime;
+	u32 status;
+	int offset;
+	int block_size;
+	int next_period;
+	int retval = IRQ_NONE;
+
+	spin_lock(&chip->lock);
+
+	block_size = frames_to_bytes(runtime, runtime->period_size);
+	status = ssc_readl(chip->ssc->regs, IMR);
+
+	if (status & SSC_BIT(IMR_ENDTX)) {
+		chip->period++;
+		if (chip->period == runtime->periods)
+			chip->period = 0;
+		next_period = chip->period + 1;
+		if (next_period == runtime->periods)
+			next_period = 0;
+
+		offset = block_size * next_period;
+
+		ssc_writel(chip->ssc->regs, PDC_TNPR,
+				(long)runtime->dma_addr + offset);
+		ssc_writel(chip->ssc->regs, PDC_TNCR,
+				runtime->period_size * runtime->channels);
+		retval = IRQ_HANDLED;
+	}
+
+	ssc_readl(chip->ssc->regs, IMR);
+	spin_unlock(&chip->lock);
+
+	if (status & SSC_BIT(IMR_ENDTX))
+		snd_pcm_period_elapsed(chip->substream);
+
+	return retval;
+}
+
+/*
+ * Mixer functions.
+ */
+static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+
+	mutex_lock(&chip->mixer_lock);
+
+	ucontrol->value.integer.value[0] =
+		(chip->reg_image[reg] >> shift) & mask;
+
+	if (invert)
+		ucontrol->value.integer.value[0] =
+			mask - ucontrol->value.integer.value[0];
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	int change, retval;
+	unsigned short val;
+
+	val = (ucontrol->value.integer.value[0] & mask);
+	if (invert)
+		val = mask - val;
+	val <<= shift;
+
+	mutex_lock(&chip->mixer_lock);
+
+	val = (chip->reg_image[reg] & ~(mask << shift)) | val;
+	change = val != chip->reg_image[reg];
+	retval = snd_at73c213_write_reg(chip, reg, val);
+
+	mutex_unlock(&chip->mixer_lock);
+
+	if (retval)
+		return retval;
+
+	return change;
+}
+
+static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+
+	if (mask == 1)
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	else
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = mask;
+
+	return 0;
+}
+
+static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+
+	mutex_lock(&chip->mixer_lock);
+
+	ucontrol->value.integer.value[0] =
+		(chip->reg_image[left_reg] >> shift_left) & mask;
+	ucontrol->value.integer.value[1] =
+		(chip->reg_image[right_reg] >> shift_right) & mask;
+
+	if (invert) {
+		ucontrol->value.integer.value[0] =
+			mask - ucontrol->value.integer.value[0];
+		ucontrol->value.integer.value[1] =
+			mask - ucontrol->value.integer.value[1];
+	}
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+	int change, retval;
+	unsigned short val1, val2;
+
+	val1 = ucontrol->value.integer.value[0] & mask;
+	val2 = ucontrol->value.integer.value[1] & mask;
+	if (invert) {
+		val1 = mask - val1;
+		val2 = mask - val2;
+	}
+	val1 <<= shift_left;
+	val2 <<= shift_right;
+
+	mutex_lock(&chip->mixer_lock);
+
+	val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
+	val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
+	change = val1 != chip->reg_image[left_reg]
+		|| val2 != chip->reg_image[right_reg];
+	retval = snd_at73c213_write_reg(chip, left_reg, val1);
+	if (retval) {
+		mutex_unlock(&chip->mixer_lock);
+		goto out;
+	}
+	retval = snd_at73c213_write_reg(chip, right_reg, val2);
+	if (retval) {
+		mutex_unlock(&chip->mixer_lock);
+		goto out;
+	}
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return change;
+
+out:
+	return retval;
+}
+
+#define snd_at73c213_mono_switch_info	snd_ctl_boolean_mono_info
+
+static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+
+	mutex_lock(&chip->mixer_lock);
+
+	ucontrol->value.integer.value[0] =
+		(chip->reg_image[reg] >> shift) & 0x01;
+
+	if (invert)
+		ucontrol->value.integer.value[0] =
+			0x01 - ucontrol->value.integer.value[0];
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	int change, retval;
+	unsigned short val;
+
+	if (ucontrol->value.integer.value[0])
+		val = mask;
+	else
+		val = 0;
+
+	if (invert)
+		val = mask - val;
+	val <<= shift;
+
+	mutex_lock(&chip->mixer_lock);
+
+	val |= (chip->reg_image[reg] & ~(mask << shift));
+	change = val != chip->reg_image[reg];
+
+	retval = snd_at73c213_write_reg(chip, reg, val);
+
+	mutex_unlock(&chip->mixer_lock);
+
+	if (retval)
+		return retval;
+
+	return change;
+}
+
+static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
+
+	return 0;
+}
+
+static int snd_at73c213_line_capture_volume_info(
+		struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	/* When inverted will give values 0x10001 => 0. */
+	uinfo->value.integer.min = 14;
+	uinfo->value.integer.max = 31;
+
+	return 0;
+}
+
+static int snd_at73c213_aux_capture_volume_info(
+		struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	/* When inverted will give values 0x10001 => 0. */
+	uinfo->value.integer.min = 14;
+	uinfo->value.integer.max = 31;
+
+	return 0;
+}
+
+#define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert)	\
+{									\
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,				\
+	.name = xname,							\
+	.index = xindex,						\
+	.info = snd_at73c213_mono_switch_info,				\
+	.get = snd_at73c213_mono_switch_get,				\
+	.put = snd_at73c213_mono_switch_put,				\
+	.private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
+}
+
+#define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
+{									\
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,				\
+	.name = xname,							\
+	.index = xindex,						\
+	.info = snd_at73c213_stereo_info,				\
+	.get = snd_at73c213_stereo_get,					\
+	.put = snd_at73c213_stereo_put,					\
+	.private_value = (left_reg | (right_reg << 8)			\
+			| (shift_left << 16) | (shift_right << 19)	\
+			| (mask << 24) | (invert << 22))		\
+}
+
+static struct snd_kcontrol_new snd_at73c213_controls[] = {
+AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
+AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
+AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
+AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
+AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
+		     0x01, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "PA Playback Volume",
+	.index	= 0,
+	.info	= snd_at73c213_pa_volume_info,
+	.get	= snd_at73c213_mono_get,
+	.put	= snd_at73c213_mono_put,
+	.private_value	= PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
+		(0x0f << 16) | (1 << 24),
+},
+AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
+		     0x01, 1),
+AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "Aux Capture Volume",
+	.index	= 0,
+	.info	= snd_at73c213_aux_capture_volume_info,
+	.get	= snd_at73c213_mono_get,
+	.put	= snd_at73c213_mono_put,
+	.private_value	= DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
+},
+AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
+		     0x01, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "Line Capture Volume",
+	.index	= 0,
+	.info	= snd_at73c213_line_capture_volume_info,
+	.get	= snd_at73c213_stereo_get,
+	.put	= snd_at73c213_stereo_put,
+	.private_value	= DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
+		| (0x1f << 24) | (1 << 22),
+},
+AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
+};
+
+static int snd_at73c213_mixer(struct snd_at73c213 *chip)
+{
+	struct snd_card *card;
+	int errval, idx;
+
+	if (chip == NULL || chip->pcm == NULL)
+		return -EINVAL;
+
+	card = chip->card;
+
+	strcpy(card->mixername, chip->pcm->name);
+
+	for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
+		errval = snd_ctl_add(card,
+				snd_ctl_new1(&snd_at73c213_controls[idx],
+					chip));
+		if (errval < 0)
+			goto cleanup;
+	}
+
+	return 0;
+
+cleanup:
+	for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
+		struct snd_kcontrol *kctl;
+		kctl = snd_ctl_find_numid(card, idx);
+		if (kctl)
+			snd_ctl_remove(card, kctl);
+	}
+	return errval;
+}
+
+/*
+ * Device functions
+ */
+static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
+{
+	/*
+	 * Continuous clock output.
+	 * Starts on falling TF.
+	 * Delay 1 cycle (1 bit).
+	 * Periode is 16 bit (16 - 1).
+	 */
+	ssc_writel(chip->ssc->regs, TCMR,
+			SSC_BF(TCMR_CKO, 1)
+			| SSC_BF(TCMR_START, 4)
+			| SSC_BF(TCMR_STTDLY, 1)
+			| SSC_BF(TCMR_PERIOD, 16 - 1));
+	/*
+	 * Data length is 16 bit (16 - 1).
+	 * Transmit MSB first.
+	 * Transmit 2 words each transfer.
+	 * Frame sync length is 16 bit (16 - 1).
+	 * Frame starts on negative pulse.
+	 */
+	ssc_writel(chip->ssc->regs, TFMR,
+			SSC_BF(TFMR_DATLEN, 16 - 1)
+			| SSC_BIT(TFMR_MSBF)
+			| SSC_BF(TFMR_DATNB, 1)
+			| SSC_BF(TFMR_FSLEN, 16 - 1)
+			| SSC_BF(TFMR_FSOS, 1));
+
+	return 0;
+}
+
+static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
+{
+	int retval;
+	unsigned char dac_ctrl = 0;
+
+	retval = snd_at73c213_set_bitrate(chip);
+	if (retval)
+		goto out;
+
+	/* Enable DAC master clock. */
+	clk_enable(chip->board->dac_clk);
+
+	/* Initialize at73c213 on SPI bus. */
+	retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
+	if (retval)
+		goto out_clk;
+	msleep(1);
+	retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
+	if (retval)
+		goto out_clk;
+
+	/* Precharge everything. */
+	retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL,
+			(1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
+	if (retval)
+		goto out_clk;
+
+	msleep(50);
+
+	/* Stop precharging PA. */
+	retval = snd_at73c213_write_reg(chip, PA_CTRL,
+			(1<<PA_CTRL_APALP) | 0x0f);
+	if (retval)
+		goto out_clk;
+
+	msleep(450);
+
+	/* Stop precharging DAC, turn on master power. */
+	retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
+	if (retval)
+		goto out_clk;
+
+	msleep(1);
+
+	/* Turn on DAC. */
+	dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
+		| (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
+
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
+	if (retval)
+		goto out_clk;
+
+	/* Mute sound. */
+	retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
+	if (retval)
+		goto out_clk;
+
+	/* Enable I2S device, i.e. clock output. */
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
+
+	goto out;
+
+out_clk:
+	clk_disable(chip->board->dac_clk);
+out:
+	return retval;
+}
+
+static int snd_at73c213_dev_free(struct snd_device *device)
+{
+	struct snd_at73c213 *chip = device->device_data;
+
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	if (chip->irq >= 0) {
+		free_irq(chip->irq, chip);
+		chip->irq = -1;
+	}
+
+	return 0;
+}
+
+static int snd_at73c213_dev_init(struct snd_card *card,
+				 struct spi_device *spi)
+{
+	static struct snd_device_ops ops = {
+		.dev_free	= snd_at73c213_dev_free,
+	};
+	struct snd_at73c213 *chip = get_chip(card);
+	int irq, retval;
+
+	irq = chip->ssc->irq;
+	if (irq < 0)
+		return irq;
+
+	spin_lock_init(&chip->lock);
+	mutex_init(&chip->mixer_lock);
+	chip->card = card;
+	chip->irq = -1;
+
+	clk_enable(chip->ssc->clk);
+
+	retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
+	if (retval) {
+		dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
+		goto out;
+	}
+	chip->irq = irq;
+
+	memcpy(&chip->reg_image, &snd_at73c213_original_image,
+			sizeof(snd_at73c213_original_image));
+
+	retval = snd_at73c213_ssc_init(chip);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_at73c213_chip_init(chip);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_at73c213_pcm_new(chip, 0);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_at73c213_mixer(chip);
+	if (retval)
+		goto out_snd_dev;
+
+	goto out;
+
+out_snd_dev:
+	snd_device_free(card, chip);
+out_irq:
+	free_irq(chip->irq, chip);
+	chip->irq = -1;
+out:
+	clk_disable(chip->ssc->clk);
+
+	return retval;
+}
+
+static int snd_at73c213_probe(struct spi_device *spi)
+{
+	struct snd_card			*card;
+	struct snd_at73c213		*chip;
+	struct at73c213_board_info	*board;
+	int				retval;
+	char				id[16];
+
+	board = spi->dev.platform_data;
+	if (!board) {
+		dev_dbg(&spi->dev, "no platform_data\n");
+		return -ENXIO;
+	}
+
+	if (!board->dac_clk) {
+		dev_dbg(&spi->dev, "no DAC clk\n");
+		return -ENXIO;
+	}
+
+	if (IS_ERR(board->dac_clk)) {
+		dev_dbg(&spi->dev, "no DAC clk\n");
+		return PTR_ERR(board->dac_clk);
+	}
+
+	/* Allocate "card" using some unused identifiers. */
+	snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
+	retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
+			      sizeof(struct snd_at73c213), &card);
+	if (retval < 0)
+		goto out;
+
+	chip = card->private_data;
+	chip->spi = spi;
+	chip->board = board;
+
+	chip->ssc = ssc_request(board->ssc_id);
+	if (IS_ERR(chip->ssc)) {
+		dev_dbg(&spi->dev, "could not get ssc%d device\n",
+				board->ssc_id);
+		retval = PTR_ERR(chip->ssc);
+		goto out_card;
+	}
+
+	retval = snd_at73c213_dev_init(card, spi);
+	if (retval)
+		goto out_ssc;
+
+	strcpy(card->driver, "at73c213");
+	strcpy(card->shortname, board->shortname);
+	sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
+
+	retval = snd_card_register(card);
+	if (retval)
+		goto out_ssc;
+
+	dev_set_drvdata(&spi->dev, card);
+
+	goto out;
+
+out_ssc:
+	ssc_free(chip->ssc);
+out_card:
+	snd_card_free(card);
+out:
+	return retval;
+}
+
+static int snd_at73c213_remove(struct spi_device *spi)
+{
+	struct snd_card *card = dev_get_drvdata(&spi->dev);
+	struct snd_at73c213 *chip = card->private_data;
+	int retval;
+
+	/* Stop playback. */
+	clk_enable(chip->ssc->clk);
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	clk_disable(chip->ssc->clk);
+
+	/* Mute sound. */
+	retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
+	if (retval)
+		goto out;
+
+	/* Turn off PA. */
+	retval = snd_at73c213_write_reg(chip, PA_CTRL,
+					chip->reg_image[PA_CTRL] | 0x0f);
+	if (retval)
+		goto out;
+	msleep(10);
+	retval = snd_at73c213_write_reg(chip, PA_CTRL,
+					(1 << PA_CTRL_APALP) | 0x0f);
+	if (retval)
+		goto out;
+
+	/* Turn off external DAC. */
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
+	if (retval)
+		goto out;
+	msleep(2);
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
+	if (retval)
+		goto out;
+
+	/* Turn off master power. */
+	retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
+	if (retval)
+		goto out;
+
+out:
+	/* Stop DAC master clock. */
+	clk_disable(chip->board->dac_clk);
+
+	ssc_free(chip->ssc);
+	snd_card_free(card);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int snd_at73c213_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct snd_at73c213 *chip = card->private_data;
+
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	clk_disable(chip->ssc->clk);
+	clk_disable(chip->board->dac_clk);
+
+	return 0;
+}
+
+static int snd_at73c213_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct snd_at73c213 *chip = card->private_data;
+
+	clk_enable(chip->board->dac_clk);
+	clk_enable(chip->ssc->clk);
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend,
+		snd_at73c213_resume);
+#define AT73C213_PM_OPS (&at73c213_pm_ops)
+
+#else
+#define AT73C213_PM_OPS NULL
+#endif
+
+static struct spi_driver at73c213_driver = {
+	.driver		= {
+		.name	= "at73c213",
+		.pm	= AT73C213_PM_OPS,
+	},
+	.probe		= snd_at73c213_probe,
+	.remove		= snd_at73c213_remove,
+};
+
+module_spi_driver(at73c213_driver);
+
+MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
+MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
+MODULE_LICENSE("GPL");
diff --git a/recipes-kernel/spiaudio-module/files/hello.c b/recipes-kernel/spiaudio-module/files/hello.c
new file mode 100644
index 0000000..f3c0d37
--- /dev/null
+++ b/recipes-kernel/spiaudio-module/files/hello.c
@@ -0,0 +1,33 @@
+/******************************************************************************
+ *
+ *   Copyright (C) 2011  Intel Corporation. All rights reserved.
+ *
+ *   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; version 2 of the License.
+ *
+ *   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/module.h>
+
+int init_module(void)
+{
+	printk("Hello World!\n");
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	printk("Goodbye Cruel World!\n");
+}
+
+MODULE_LICENSE("GPL");
diff --git a/recipes-kernel/spiaudio-module/spiaudio-module.bb b/recipes-kernel/spiaudio-module/spiaudio-module.bb
new file mode 100644
index 0000000..5e11f0f
--- /dev/null
+++ b/recipes-kernel/spiaudio-module/spiaudio-module.bb
@@ -0,0 +1,16 @@
+DESCRIPTION = "hello-world-mod tests the module.bbclass mechanism."
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://COPYING;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e"
+
+inherit module
+
+PR = "r0"
+PV = "0.1"
+
+SRC_URI = "file://Makefile \
+           file://at73c213_.c \
+           file://at73c213.h \
+           file://COPYING \
+          "
+
+S = "${WORKDIR}"