Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1086 insertions, 0 deletions

diff --git a/sound/sparc/amd7930.c b/sound/sparc/amd7930.c
new file mode 100644
index 000000000..c434b69a8
--- /dev/null
+++ b/sound/sparc/amd7930.c
@@ -0,0 +1,1086 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for AMD7930 sound chips found on Sparcs.
+ * Copyright (C) 2002, 2008 David S. Miller <davem@davemloft.net>
+ *
+ * Based entirely upon drivers/sbus/audio/amd7930.c which is:
+ * Copyright (C) 1996,1997 Thomas K. Dyas (tdyas@eden.rutgers.edu)
+ *
+ * --- Notes from Thomas's original driver ---
+ * This is the lowlevel driver for the AMD7930 audio chip found on all
+ * sun4c machines and some sun4m machines.
+ *
+ * The amd7930 is actually an ISDN chip which has a very simple
+ * integrated audio encoder/decoder. When Sun decided on what chip to
+ * use for audio, they had the brilliant idea of using the amd7930 and
+ * only connecting the audio encoder/decoder pins.
+ *
+ * Thanks to the AMD engineer who was able to get us the AMD79C30
+ * databook which has all the programming information and gain tables.
+ *
+ * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the
+ * SparcStation 1+.  The chip provides microphone and speaker interfaces
+ * which provide mono-channel audio at 8K samples per second via either
+ * 8-bit A-law or 8-bit mu-law encoding.  Also, the chip features an
+ * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface,
+ * which performs basic D channel LAPD processing and provides raw
+ * B channel data.  The digital audio channel, the two ISDN B channels,
+ * and two 64 Kbps channels to the microprocessor are all interconnected
+ * via a multiplexer.
+ * --- End of notes from Thoamas's original driver ---
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/io.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/info.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+
+#include <asm/irq.h>
+#include <asm/prom.h>
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for Sun AMD7930 soundcard.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for Sun AMD7930 soundcard.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable Sun AMD7930 soundcard.");
+MODULE_AUTHOR("Thomas K. Dyas and David S. Miller");
+MODULE_DESCRIPTION("Sun AMD7930");
+MODULE_LICENSE("GPL");
+
+/* Device register layout.  */
+
+/* Register interface presented to the CPU by the amd7930. */
+#define AMD7930_CR	0x00UL		/* Command Register (W) */
+#define AMD7930_IR	AMD7930_CR	/* Interrupt Register (R) */
+#define AMD7930_DR	0x01UL		/* Data Register (R/W) */
+#define AMD7930_DSR1	0x02UL		/* D-channel Status Register 1 (R) */
+#define AMD7930_DER	0x03UL		/* D-channel Error Register (R) */
+#define AMD7930_DCTB	0x04UL		/* D-channel Transmit Buffer (W) */
+#define AMD7930_DCRB	AMD7930_DCTB	/* D-channel Receive Buffer (R) */
+#define AMD7930_BBTB	0x05UL		/* Bb-channel Transmit Buffer (W) */
+#define AMD7930_BBRB	AMD7930_BBTB	/* Bb-channel Receive Buffer (R) */
+#define AMD7930_BCTB	0x06UL		/* Bc-channel Transmit Buffer (W) */
+#define AMD7930_BCRB	AMD7930_BCTB	/* Bc-channel Receive Buffer (R) */
+#define AMD7930_DSR2	0x07UL		/* D-channel Status Register 2 (R) */
+
+/* Indirect registers in the Main Audio Processor. */
+struct amd7930_map {
+	__u16	x[8];
+	__u16	r[8];
+	__u16	gx;
+	__u16	gr;
+	__u16	ger;
+	__u16	stgr;
+	__u16	ftgr;
+	__u16	atgr;
+	__u8	mmr1;
+	__u8	mmr2;
+};
+
+/* After an amd7930 interrupt, reading the Interrupt Register (ir)
+ * clears the interrupt and returns a bitmask indicating which
+ * interrupt source(s) require service.
+ */
+
+#define AMR_IR_DTTHRSH			0x01 /* D-channel xmit threshold */
+#define AMR_IR_DRTHRSH			0x02 /* D-channel recv threshold */
+#define AMR_IR_DSRI			0x04 /* D-channel packet status */
+#define AMR_IR_DERI			0x08 /* D-channel error */
+#define AMR_IR_BBUF			0x10 /* B-channel data xfer */
+#define AMR_IR_LSRI			0x20 /* LIU status */
+#define AMR_IR_DSR2I			0x40 /* D-channel buffer status */
+#define AMR_IR_MLTFRMI			0x80 /* multiframe or PP */
+
+/* The amd7930 has "indirect registers" which are accessed by writing
+ * the register number into the Command Register and then reading or
+ * writing values from the Data Register as appropriate. We define the
+ * AMR_* macros to be the indirect register numbers and AM_* macros to
+ * be bits in whatever register is referred to.
+ */
+
+/* Initialization */
+#define	AMR_INIT			0x21
+#define		AM_INIT_ACTIVE			0x01
+#define		AM_INIT_DATAONLY		0x02
+#define		AM_INIT_POWERDOWN		0x03
+#define		AM_INIT_DISABLE_INTS		0x04
+#define AMR_INIT2			0x20
+#define		AM_INIT2_ENABLE_POWERDOWN	0x20
+#define		AM_INIT2_ENABLE_MULTIFRAME	0x10
+
+/* Line Interface Unit */
+#define	AMR_LIU_LSR			0xA1
+#define		AM_LIU_LSR_STATE		0x07
+#define		AM_LIU_LSR_F3			0x08
+#define		AM_LIU_LSR_F7			0x10
+#define		AM_LIU_LSR_F8			0x20
+#define		AM_LIU_LSR_HSW			0x40
+#define		AM_LIU_LSR_HSW_CHG		0x80
+#define	AMR_LIU_LPR			0xA2
+#define	AMR_LIU_LMR1			0xA3
+#define		AM_LIU_LMR1_B1_ENABL		0x01
+#define		AM_LIU_LMR1_B2_ENABL		0x02
+#define		AM_LIU_LMR1_F_DISABL		0x04
+#define		AM_LIU_LMR1_FA_DISABL		0x08
+#define		AM_LIU_LMR1_REQ_ACTIV		0x10
+#define		AM_LIU_LMR1_F8_F3		0x20
+#define		AM_LIU_LMR1_LIU_ENABL		0x40
+#define	AMR_LIU_LMR2			0xA4
+#define		AM_LIU_LMR2_DECHO		0x01
+#define		AM_LIU_LMR2_DLOOP		0x02
+#define		AM_LIU_LMR2_DBACKOFF		0x04
+#define		AM_LIU_LMR2_EN_F3_INT		0x08
+#define		AM_LIU_LMR2_EN_F8_INT		0x10
+#define		AM_LIU_LMR2_EN_HSW_INT		0x20
+#define		AM_LIU_LMR2_EN_F7_INT		0x40
+#define	AMR_LIU_2_4			0xA5
+#define	AMR_LIU_MF			0xA6
+#define	AMR_LIU_MFSB			0xA7
+#define	AMR_LIU_MFQB			0xA8
+
+/* Multiplexor */
+#define	AMR_MUX_MCR1			0x41
+#define	AMR_MUX_MCR2			0x42
+#define	AMR_MUX_MCR3			0x43
+#define		AM_MUX_CHANNEL_B1		0x01
+#define		AM_MUX_CHANNEL_B2		0x02
+#define		AM_MUX_CHANNEL_Ba		0x03
+#define		AM_MUX_CHANNEL_Bb		0x04
+#define		AM_MUX_CHANNEL_Bc		0x05
+#define		AM_MUX_CHANNEL_Bd		0x06
+#define		AM_MUX_CHANNEL_Be		0x07
+#define		AM_MUX_CHANNEL_Bf		0x08
+#define	AMR_MUX_MCR4			0x44
+#define		AM_MUX_MCR4_ENABLE_INTS		0x08
+#define		AM_MUX_MCR4_REVERSE_Bb		0x10
+#define		AM_MUX_MCR4_REVERSE_Bc		0x20
+#define	AMR_MUX_1_4			0x45
+
+/* Main Audio Processor */
+#define	AMR_MAP_X			0x61
+#define	AMR_MAP_R			0x62
+#define	AMR_MAP_GX			0x63
+#define	AMR_MAP_GR			0x64
+#define	AMR_MAP_GER			0x65
+#define	AMR_MAP_STGR			0x66
+#define	AMR_MAP_FTGR_1_2		0x67
+#define	AMR_MAP_ATGR_1_2		0x68
+#define	AMR_MAP_MMR1			0x69
+#define		AM_MAP_MMR1_ALAW		0x01
+#define		AM_MAP_MMR1_GX			0x02
+#define		AM_MAP_MMR1_GR			0x04
+#define		AM_MAP_MMR1_GER			0x08
+#define		AM_MAP_MMR1_X			0x10
+#define		AM_MAP_MMR1_R			0x20
+#define		AM_MAP_MMR1_STG			0x40
+#define		AM_MAP_MMR1_LOOPBACK		0x80
+#define	AMR_MAP_MMR2			0x6A
+#define		AM_MAP_MMR2_AINB		0x01
+#define		AM_MAP_MMR2_LS			0x02
+#define		AM_MAP_MMR2_ENABLE_DTMF		0x04
+#define		AM_MAP_MMR2_ENABLE_TONEGEN	0x08
+#define		AM_MAP_MMR2_ENABLE_TONERING	0x10
+#define		AM_MAP_MMR2_DISABLE_HIGHPASS	0x20
+#define		AM_MAP_MMR2_DISABLE_AUTOZERO	0x40
+#define	AMR_MAP_1_10			0x6B
+#define	AMR_MAP_MMR3			0x6C
+#define	AMR_MAP_STRA			0x6D
+#define	AMR_MAP_STRF			0x6E
+#define	AMR_MAP_PEAKX			0x70
+#define	AMR_MAP_PEAKR			0x71
+#define	AMR_MAP_15_16			0x72
+
+/* Data Link Controller */
+#define	AMR_DLC_FRAR_1_2_3		0x81
+#define	AMR_DLC_SRAR_1_2_3		0x82
+#define	AMR_DLC_TAR			0x83
+#define	AMR_DLC_DRLR			0x84
+#define	AMR_DLC_DTCR			0x85
+#define	AMR_DLC_DMR1			0x86
+#define		AMR_DLC_DMR1_DTTHRSH_INT	0x01
+#define		AMR_DLC_DMR1_DRTHRSH_INT	0x02
+#define		AMR_DLC_DMR1_TAR_ENABL		0x04
+#define		AMR_DLC_DMR1_EORP_INT		0x08
+#define		AMR_DLC_DMR1_EN_ADDR1		0x10
+#define		AMR_DLC_DMR1_EN_ADDR2		0x20
+#define		AMR_DLC_DMR1_EN_ADDR3		0x40
+#define		AMR_DLC_DMR1_EN_ADDR4		0x80
+#define		AMR_DLC_DMR1_EN_ADDRS		0xf0
+#define	AMR_DLC_DMR2			0x87
+#define		AMR_DLC_DMR2_RABRT_INT		0x01
+#define		AMR_DLC_DMR2_RESID_INT		0x02
+#define		AMR_DLC_DMR2_COLL_INT		0x04
+#define		AMR_DLC_DMR2_FCS_INT		0x08
+#define		AMR_DLC_DMR2_OVFL_INT		0x10
+#define		AMR_DLC_DMR2_UNFL_INT		0x20
+#define		AMR_DLC_DMR2_OVRN_INT		0x40
+#define		AMR_DLC_DMR2_UNRN_INT		0x80
+#define	AMR_DLC_1_7			0x88
+#define	AMR_DLC_DRCR			0x89
+#define	AMR_DLC_RNGR1			0x8A
+#define	AMR_DLC_RNGR2			0x8B
+#define	AMR_DLC_FRAR4			0x8C
+#define	AMR_DLC_SRAR4			0x8D
+#define	AMR_DLC_DMR3			0x8E
+#define		AMR_DLC_DMR3_VA_INT		0x01
+#define		AMR_DLC_DMR3_EOTP_INT		0x02
+#define		AMR_DLC_DMR3_LBRP_INT		0x04
+#define		AMR_DLC_DMR3_RBA_INT		0x08
+#define		AMR_DLC_DMR3_LBT_INT		0x10
+#define		AMR_DLC_DMR3_TBE_INT		0x20
+#define		AMR_DLC_DMR3_RPLOST_INT		0x40
+#define		AMR_DLC_DMR3_KEEP_FCS		0x80
+#define	AMR_DLC_DMR4			0x8F
+#define		AMR_DLC_DMR4_RCV_1		0x00
+#define		AMR_DLC_DMR4_RCV_2		0x01
+#define		AMR_DLC_DMR4_RCV_4		0x02
+#define		AMR_DLC_DMR4_RCV_8		0x03
+#define		AMR_DLC_DMR4_RCV_16		0x01
+#define		AMR_DLC_DMR4_RCV_24		0x02
+#define		AMR_DLC_DMR4_RCV_30		0x03
+#define		AMR_DLC_DMR4_XMT_1		0x00
+#define		AMR_DLC_DMR4_XMT_2		0x04
+#define		AMR_DLC_DMR4_XMT_4		0x08
+#define		AMR_DLC_DMR4_XMT_8		0x0c
+#define		AMR_DLC_DMR4_XMT_10		0x08
+#define		AMR_DLC_DMR4_XMT_14		0x0c
+#define		AMR_DLC_DMR4_IDLE_MARK		0x00
+#define		AMR_DLC_DMR4_IDLE_FLAG		0x10
+#define		AMR_DLC_DMR4_ADDR_BOTH		0x00
+#define		AMR_DLC_DMR4_ADDR_1ST		0x20
+#define		AMR_DLC_DMR4_ADDR_2ND		0xa0
+#define		AMR_DLC_DMR4_CR_ENABLE		0x40
+#define	AMR_DLC_12_15			0x90
+#define	AMR_DLC_ASR			0x91
+#define	AMR_DLC_EFCR			0x92
+#define		AMR_DLC_EFCR_EXTEND_FIFO	0x01
+#define		AMR_DLC_EFCR_SEC_PKT_INT	0x02
+
+#define AMR_DSR1_VADDR			0x01
+#define AMR_DSR1_EORP			0x02
+#define AMR_DSR1_PKT_IP			0x04
+#define AMR_DSR1_DECHO_ON		0x08
+#define AMR_DSR1_DLOOP_ON		0x10
+#define AMR_DSR1_DBACK_OFF		0x20
+#define AMR_DSR1_EOTP			0x40
+#define AMR_DSR1_CXMT_ABRT		0x80
+
+#define AMR_DSR2_LBRP			0x01
+#define AMR_DSR2_RBA			0x02
+#define AMR_DSR2_RPLOST			0x04
+#define AMR_DSR2_LAST_BYTE		0x08
+#define AMR_DSR2_TBE			0x10
+#define AMR_DSR2_MARK_IDLE		0x20
+#define AMR_DSR2_FLAG_IDLE		0x40
+#define AMR_DSR2_SECOND_PKT		0x80
+
+#define AMR_DER_RABRT			0x01
+#define AMR_DER_RFRAME			0x02
+#define AMR_DER_COLLISION		0x04
+#define AMR_DER_FCS			0x08
+#define AMR_DER_OVFL			0x10
+#define AMR_DER_UNFL			0x20
+#define AMR_DER_OVRN			0x40
+#define AMR_DER_UNRN			0x80
+
+/* Peripheral Port */
+#define	AMR_PP_PPCR1			0xC0
+#define	AMR_PP_PPSR			0xC1
+#define	AMR_PP_PPIER			0xC2
+#define	AMR_PP_MTDR			0xC3
+#define	AMR_PP_MRDR			0xC3
+#define	AMR_PP_CITDR0			0xC4
+#define	AMR_PP_CIRDR0			0xC4
+#define	AMR_PP_CITDR1			0xC5
+#define	AMR_PP_CIRDR1			0xC5
+#define	AMR_PP_PPCR2			0xC8
+#define	AMR_PP_PPCR3			0xC9
+
+struct snd_amd7930 {
+	spinlock_t		lock;
+	void __iomem		*regs;
+	u32			flags;
+#define AMD7930_FLAG_PLAYBACK	0x00000001
+#define AMD7930_FLAG_CAPTURE	0x00000002
+
+	struct amd7930_map	map;
+
+	struct snd_card		*card;
+	struct snd_pcm		*pcm;
+	struct snd_pcm_substream	*playback_substream;
+	struct snd_pcm_substream	*capture_substream;
+
+	/* Playback/Capture buffer state. */
+	unsigned char		*p_orig, *p_cur;
+	int			p_left;
+	unsigned char		*c_orig, *c_cur;
+	int			c_left;
+
+	int			rgain;
+	int			pgain;
+	int			mgain;
+
+	struct platform_device	*op;
+	unsigned int		irq;
+	struct snd_amd7930	*next;
+};
+
+static struct snd_amd7930 *amd7930_list;
+
+/* Idle the AMD7930 chip.  The amd->lock is not held.  */
+static __inline__ void amd7930_idle(struct snd_amd7930 *amd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&amd->lock, flags);
+	sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
+	sbus_writeb(0, amd->regs + AMD7930_DR);
+	spin_unlock_irqrestore(&amd->lock, flags);
+}
+
+/* Enable chip interrupts.  The amd->lock is not held.  */
+static __inline__ void amd7930_enable_ints(struct snd_amd7930 *amd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&amd->lock, flags);
+	sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
+	sbus_writeb(AM_INIT_ACTIVE, amd->regs + AMD7930_DR);
+	spin_unlock_irqrestore(&amd->lock, flags);
+}
+
+/* Disable chip interrupts.  The amd->lock is not held.  */
+static __inline__ void amd7930_disable_ints(struct snd_amd7930 *amd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&amd->lock, flags);
+	sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
+	sbus_writeb(AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS, amd->regs + AMD7930_DR);
+	spin_unlock_irqrestore(&amd->lock, flags);
+}
+
+/* Commit amd7930_map settings to the hardware.
+ * The amd->lock is held and local interrupts are disabled.
+ */
+static void __amd7930_write_map(struct snd_amd7930 *amd)
+{
+	struct amd7930_map *map = &amd->map;
+
+	sbus_writeb(AMR_MAP_GX, amd->regs + AMD7930_CR);
+	sbus_writeb(((map->gx >> 0) & 0xff), amd->regs + AMD7930_DR);
+	sbus_writeb(((map->gx >> 8) & 0xff), amd->regs + AMD7930_DR);
+
+	sbus_writeb(AMR_MAP_GR, amd->regs + AMD7930_CR);
+	sbus_writeb(((map->gr >> 0) & 0xff), amd->regs + AMD7930_DR);
+	sbus_writeb(((map->gr >> 8) & 0xff), amd->regs + AMD7930_DR);
+
+	sbus_writeb(AMR_MAP_STGR, amd->regs + AMD7930_CR);
+	sbus_writeb(((map->stgr >> 0) & 0xff), amd->regs + AMD7930_DR);
+	sbus_writeb(((map->stgr >> 8) & 0xff), amd->regs + AMD7930_DR);
+
+	sbus_writeb(AMR_MAP_GER, amd->regs + AMD7930_CR);
+	sbus_writeb(((map->ger >> 0) & 0xff), amd->regs + AMD7930_DR);
+	sbus_writeb(((map->ger >> 8) & 0xff), amd->regs + AMD7930_DR);
+
+	sbus_writeb(AMR_MAP_MMR1, amd->regs + AMD7930_CR);
+	sbus_writeb(map->mmr1, amd->regs + AMD7930_DR);
+
+	sbus_writeb(AMR_MAP_MMR2, amd->regs + AMD7930_CR);
+	sbus_writeb(map->mmr2, amd->regs + AMD7930_DR);
+}
+
+/* gx, gr & stg gains.  this table must contain 256 elements with
+ * the 0th being "infinity" (the magic value 9008).  The remaining
+ * elements match sun's gain curve (but with higher resolution):
+ * -18 to 0dB in .16dB steps then 0 to 12dB in .08dB steps.
+ */
+static __const__ __u16 gx_coeff[256] = {
+	0x9008, 0x8b7c, 0x8b51, 0x8b45, 0x8b42, 0x8b3b, 0x8b36, 0x8b33,
+	0x8b32, 0x8b2a, 0x8b2b, 0x8b2c, 0x8b25, 0x8b23, 0x8b22, 0x8b22,
+	0x9122, 0x8b1a, 0x8aa3, 0x8aa3, 0x8b1c, 0x8aa6, 0x912d, 0x912b,
+	0x8aab, 0x8b12, 0x8aaa, 0x8ab2, 0x9132, 0x8ab4, 0x913c, 0x8abb,
+	0x9142, 0x9144, 0x9151, 0x8ad5, 0x8aeb, 0x8a79, 0x8a5a, 0x8a4a,
+	0x8b03, 0x91c2, 0x91bb, 0x8a3f, 0x8a33, 0x91b2, 0x9212, 0x9213,
+	0x8a2c, 0x921d, 0x8a23, 0x921a, 0x9222, 0x9223, 0x922d, 0x9231,
+	0x9234, 0x9242, 0x925b, 0x92dd, 0x92c1, 0x92b3, 0x92ab, 0x92a4,
+	0x92a2, 0x932b, 0x9341, 0x93d3, 0x93b2, 0x93a2, 0x943c, 0x94b2,
+	0x953a, 0x9653, 0x9782, 0x9e21, 0x9d23, 0x9cd2, 0x9c23, 0x9baa,
+	0x9bde, 0x9b33, 0x9b22, 0x9b1d, 0x9ab2, 0xa142, 0xa1e5, 0x9a3b,
+	0xa213, 0xa1a2, 0xa231, 0xa2eb, 0xa313, 0xa334, 0xa421, 0xa54b,
+	0xada4, 0xac23, 0xab3b, 0xaaab, 0xaa5c, 0xb1a3, 0xb2ca, 0xb3bd,
+	0xbe24, 0xbb2b, 0xba33, 0xc32b, 0xcb5a, 0xd2a2, 0xe31d, 0x0808,
+	0x72ba, 0x62c2, 0x5c32, 0x52db, 0x513e, 0x4cce, 0x43b2, 0x4243,
+	0x41b4, 0x3b12, 0x3bc3, 0x3df2, 0x34bd, 0x3334, 0x32c2, 0x3224,
+	0x31aa, 0x2a7b, 0x2aaa, 0x2b23, 0x2bba, 0x2c42, 0x2e23, 0x25bb,
+	0x242b, 0x240f, 0x231a, 0x22bb, 0x2241, 0x2223, 0x221f, 0x1a33,
+	0x1a4a, 0x1acd, 0x2132, 0x1b1b, 0x1b2c, 0x1b62, 0x1c12, 0x1c32,
+	0x1d1b, 0x1e71, 0x16b1, 0x1522, 0x1434, 0x1412, 0x1352, 0x1323,
+	0x1315, 0x12bc, 0x127a, 0x1235, 0x1226, 0x11a2, 0x1216, 0x0a2a,
+	0x11bc, 0x11d1, 0x1163, 0x0ac2, 0x0ab2, 0x0aab, 0x0b1b, 0x0b23,
+	0x0b33, 0x0c0f, 0x0bb3, 0x0c1b, 0x0c3e, 0x0cb1, 0x0d4c, 0x0ec1,
+	0x079a, 0x0614, 0x0521, 0x047c, 0x0422, 0x03b1, 0x03e3, 0x0333,
+	0x0322, 0x031c, 0x02aa, 0x02ba, 0x02f2, 0x0242, 0x0232, 0x0227,
+	0x0222, 0x021b, 0x01ad, 0x0212, 0x01b2, 0x01bb, 0x01cb, 0x01f6,
+	0x0152, 0x013a, 0x0133, 0x0131, 0x012c, 0x0123, 0x0122, 0x00a2,
+	0x011b, 0x011e, 0x0114, 0x00b1, 0x00aa, 0x00b3, 0x00bd, 0x00ba,
+	0x00c5, 0x00d3, 0x00f3, 0x0062, 0x0051, 0x0042, 0x003b, 0x0033,
+	0x0032, 0x002a, 0x002c, 0x0025, 0x0023, 0x0022, 0x001a, 0x0021,
+	0x001b, 0x001b, 0x001d, 0x0015, 0x0013, 0x0013, 0x0012, 0x0012,
+	0x000a, 0x000a, 0x0011, 0x0011, 0x000b, 0x000b, 0x000c, 0x000e,
+};
+
+static __const__ __u16 ger_coeff[] = {
+	0x431f, /* 5. dB */
+	0x331f, /* 5.5 dB */
+	0x40dd, /* 6. dB */
+	0x11dd, /* 6.5 dB */
+	0x440f, /* 7. dB */
+	0x411f, /* 7.5 dB */
+	0x311f, /* 8. dB */
+	0x5520, /* 8.5 dB */
+	0x10dd, /* 9. dB */
+	0x4211, /* 9.5 dB */
+	0x410f, /* 10. dB */
+	0x111f, /* 10.5 dB */
+	0x600b, /* 11. dB */
+	0x00dd, /* 11.5 dB */
+	0x4210, /* 12. dB */
+	0x110f, /* 13. dB */
+	0x7200, /* 14. dB */
+	0x2110, /* 15. dB */
+	0x2200, /* 15.9 dB */
+	0x000b, /* 16.9 dB */
+	0x000f  /* 18. dB */
+};
+
+/* Update amd7930_map settings and program them into the hardware.
+ * The amd->lock is held and local interrupts are disabled.
+ */
+static void __amd7930_update_map(struct snd_amd7930 *amd)
+{
+	struct amd7930_map *map = &amd->map;
+	int level;
+
+	map->gx = gx_coeff[amd->rgain];
+	map->stgr = gx_coeff[amd->mgain];
+	level = (amd->pgain * (256 + ARRAY_SIZE(ger_coeff))) >> 8;
+	if (level >= 256) {
+		map->ger = ger_coeff[level - 256];
+		map->gr = gx_coeff[255];
+	} else {
+		map->ger = ger_coeff[0];
+		map->gr = gx_coeff[level];
+	}
+	__amd7930_write_map(amd);
+}
+
+static irqreturn_t snd_amd7930_interrupt(int irq, void *dev_id)
+{
+	struct snd_amd7930 *amd = dev_id;
+	unsigned int elapsed;
+	u8 ir;
+
+	spin_lock(&amd->lock);
+
+	elapsed = 0;
+
+	ir = sbus_readb(amd->regs + AMD7930_IR);
+	if (ir & AMR_IR_BBUF) {
+		u8 byte;
+
+		if (amd->flags & AMD7930_FLAG_PLAYBACK) {
+			if (amd->p_left > 0) {
+				byte = *(amd->p_cur++);
+				amd->p_left--;
+				sbus_writeb(byte, amd->regs + AMD7930_BBTB);
+				if (amd->p_left == 0)
+					elapsed |= AMD7930_FLAG_PLAYBACK;
+			} else
+				sbus_writeb(0, amd->regs + AMD7930_BBTB);
+		} else if (amd->flags & AMD7930_FLAG_CAPTURE) {
+			byte = sbus_readb(amd->regs + AMD7930_BBRB);
+			if (amd->c_left > 0) {
+				*(amd->c_cur++) = byte;
+				amd->c_left--;
+				if (amd->c_left == 0)
+					elapsed |= AMD7930_FLAG_CAPTURE;
+			}
+		}
+	}
+	spin_unlock(&amd->lock);
+
+	if (elapsed & AMD7930_FLAG_PLAYBACK)
+		snd_pcm_period_elapsed(amd->playback_substream);
+	else
+		snd_pcm_period_elapsed(amd->capture_substream);
+
+	return IRQ_HANDLED;
+}
+
+static int snd_amd7930_trigger(struct snd_amd7930 *amd, unsigned int flag, int cmd)
+{
+	unsigned long flags;
+	int result = 0;
+
+	spin_lock_irqsave(&amd->lock, flags);
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		if (!(amd->flags & flag)) {
+			amd->flags |= flag;
+
+			/* Enable B channel interrupts.  */
+			sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
+			sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, amd->regs + AMD7930_DR);
+		}
+	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		if (amd->flags & flag) {
+			amd->flags &= ~flag;
+
+			/* Disable B channel interrupts.  */
+			sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
+			sbus_writeb(0, amd->regs + AMD7930_DR);
+		}
+	} else {
+		result = -EINVAL;
+	}
+	spin_unlock_irqrestore(&amd->lock, flags);
+
+	return result;
+}
+
+static int snd_amd7930_playback_trigger(struct snd_pcm_substream *substream,
+					int cmd)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	return snd_amd7930_trigger(amd, AMD7930_FLAG_PLAYBACK, cmd);
+}
+
+static int snd_amd7930_capture_trigger(struct snd_pcm_substream *substream,
+				       int cmd)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	return snd_amd7930_trigger(amd, AMD7930_FLAG_CAPTURE, cmd);
+}
+
+static int snd_amd7930_playback_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned long flags;
+	u8 new_mmr1;
+
+	spin_lock_irqsave(&amd->lock, flags);
+
+	amd->flags |= AMD7930_FLAG_PLAYBACK;
+
+	/* Setup the pseudo-dma transfer pointers.  */
+	amd->p_orig = amd->p_cur = runtime->dma_area;
+	amd->p_left = size;
+
+	/* Put the chip into the correct encoding format.  */
+	new_mmr1 = amd->map.mmr1;
+	if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
+		new_mmr1 |= AM_MAP_MMR1_ALAW;
+	else
+		new_mmr1 &= ~AM_MAP_MMR1_ALAW;
+	if (new_mmr1 != amd->map.mmr1) {
+		amd->map.mmr1 = new_mmr1;
+		__amd7930_update_map(amd);
+	}
+
+	spin_unlock_irqrestore(&amd->lock, flags);
+
+	return 0;
+}
+
+static int snd_amd7930_capture_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned long flags;
+	u8 new_mmr1;
+
+	spin_lock_irqsave(&amd->lock, flags);
+
+	amd->flags |= AMD7930_FLAG_CAPTURE;
+
+	/* Setup the pseudo-dma transfer pointers.  */
+	amd->c_orig = amd->c_cur = runtime->dma_area;
+	amd->c_left = size;
+
+	/* Put the chip into the correct encoding format.  */
+	new_mmr1 = amd->map.mmr1;
+	if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
+		new_mmr1 |= AM_MAP_MMR1_ALAW;
+	else
+		new_mmr1 &= ~AM_MAP_MMR1_ALAW;
+	if (new_mmr1 != amd->map.mmr1) {
+		amd->map.mmr1 = new_mmr1;
+		__amd7930_update_map(amd);
+	}
+
+	spin_unlock_irqrestore(&amd->lock, flags);
+
+	return 0;
+}
+
+static snd_pcm_uframes_t snd_amd7930_playback_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	size_t ptr;
+
+	if (!(amd->flags & AMD7930_FLAG_PLAYBACK))
+		return 0;
+	ptr = amd->p_cur - amd->p_orig;
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+static snd_pcm_uframes_t snd_amd7930_capture_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	size_t ptr;
+
+	if (!(amd->flags & AMD7930_FLAG_CAPTURE))
+		return 0;
+
+	ptr = amd->c_cur - amd->c_orig;
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+/* Playback and capture have identical properties.  */
+static const struct snd_pcm_hardware snd_amd7930_pcm_hw =
+{
+	.info			= (SNDRV_PCM_INFO_MMAP |
+				   SNDRV_PCM_INFO_MMAP_VALID |
+				   SNDRV_PCM_INFO_INTERLEAVED |
+				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				   SNDRV_PCM_INFO_HALF_DUPLEX),
+	.formats		= SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+	.rates			= SNDRV_PCM_RATE_8000,
+	.rate_min		= 8000,
+	.rate_max		= 8000,
+	.channels_min		= 1,
+	.channels_max		= 1,
+	.buffer_bytes_max	= (64*1024),
+	.period_bytes_min	= 1,
+	.period_bytes_max	= (64*1024),
+	.periods_min		= 1,
+	.periods_max		= 1024,
+};
+
+static int snd_amd7930_playback_open(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	amd->playback_substream = substream;
+	runtime->hw = snd_amd7930_pcm_hw;
+	return 0;
+}
+
+static int snd_amd7930_capture_open(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	amd->capture_substream = substream;
+	runtime->hw = snd_amd7930_pcm_hw;
+	return 0;
+}
+
+static int snd_amd7930_playback_close(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+
+	amd->playback_substream = NULL;
+	return 0;
+}
+
+static int snd_amd7930_capture_close(struct snd_pcm_substream *substream)
+{
+	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
+
+	amd->capture_substream = NULL;
+	return 0;
+}
+
+static const struct snd_pcm_ops snd_amd7930_playback_ops = {
+	.open		=	snd_amd7930_playback_open,
+	.close		=	snd_amd7930_playback_close,
+	.prepare	=	snd_amd7930_playback_prepare,
+	.trigger	=	snd_amd7930_playback_trigger,
+	.pointer	=	snd_amd7930_playback_pointer,
+};
+
+static const struct snd_pcm_ops snd_amd7930_capture_ops = {
+	.open		=	snd_amd7930_capture_open,
+	.close		=	snd_amd7930_capture_close,
+	.prepare	=	snd_amd7930_capture_prepare,
+	.trigger	=	snd_amd7930_capture_trigger,
+	.pointer	=	snd_amd7930_capture_pointer,
+};
+
+static int snd_amd7930_pcm(struct snd_amd7930 *amd)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	if ((err = snd_pcm_new(amd->card,
+			       /* ID */             "sun_amd7930",
+			       /* device */         0,
+			       /* playback count */ 1,
+			       /* capture count */  1, &pcm)) < 0)
+		return err;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_amd7930_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_amd7930_capture_ops);
+
+	pcm->private_data = amd;
+	pcm->info_flags = 0;
+	strcpy(pcm->name, amd->card->shortname);
+	amd->pcm = pcm;
+
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+				       NULL, 64*1024, 64*1024);
+
+	return 0;
+}
+
+#define VOLUME_MONITOR	0
+#define VOLUME_CAPTURE	1
+#define VOLUME_PLAYBACK	2
+
+static int snd_amd7930_info_volume(struct snd_kcontrol *kctl, 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 = 255;
+
+	return 0;
+}
+
+static int snd_amd7930_get_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
+	int type = kctl->private_value;
+	int *swval;
+
+	switch (type) {
+	case VOLUME_MONITOR:
+		swval = &amd->mgain;
+		break;
+	case VOLUME_CAPTURE:
+		swval = &amd->rgain;
+		break;
+	case VOLUME_PLAYBACK:
+	default:
+		swval = &amd->pgain;
+		break;
+	}
+
+	ucontrol->value.integer.value[0] = *swval;
+
+	return 0;
+}
+
+static int snd_amd7930_put_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
+	unsigned long flags;
+	int type = kctl->private_value;
+	int *swval, change;
+
+	switch (type) {
+	case VOLUME_MONITOR:
+		swval = &amd->mgain;
+		break;
+	case VOLUME_CAPTURE:
+		swval = &amd->rgain;
+		break;
+	case VOLUME_PLAYBACK:
+	default:
+		swval = &amd->pgain;
+		break;
+	}
+
+	spin_lock_irqsave(&amd->lock, flags);
+
+	if (*swval != ucontrol->value.integer.value[0]) {
+		*swval = ucontrol->value.integer.value[0] & 0xff;
+		__amd7930_update_map(amd);
+		change = 1;
+	} else
+		change = 0;
+
+	spin_unlock_irqrestore(&amd->lock, flags);
+
+	return change;
+}
+
+static const struct snd_kcontrol_new amd7930_controls[] = {
+	{
+		.iface		=	SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name		=	"Monitor Volume",
+		.index		=	0,
+		.info		=	snd_amd7930_info_volume,
+		.get		=	snd_amd7930_get_volume,
+		.put		=	snd_amd7930_put_volume,
+		.private_value	=	VOLUME_MONITOR,
+	},
+	{
+		.iface		=	SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name		=	"Capture Volume",
+		.index		=	0,
+		.info		=	snd_amd7930_info_volume,
+		.get		=	snd_amd7930_get_volume,
+		.put		=	snd_amd7930_put_volume,
+		.private_value	=	VOLUME_CAPTURE,
+	},
+	{
+		.iface		=	SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name		=	"Playback Volume",
+		.index		=	0,
+		.info		=	snd_amd7930_info_volume,
+		.get		=	snd_amd7930_get_volume,
+		.put		=	snd_amd7930_put_volume,
+		.private_value	=	VOLUME_PLAYBACK,
+	},
+};
+
+static int snd_amd7930_mixer(struct snd_amd7930 *amd)
+{
+	struct snd_card *card;
+	int idx, err;
+
+	if (snd_BUG_ON(!amd || !amd->card))
+		return -EINVAL;
+
+	card = amd->card;
+	strcpy(card->mixername, card->shortname);
+
+	for (idx = 0; idx < ARRAY_SIZE(amd7930_controls); idx++) {
+		if ((err = snd_ctl_add(card,
+				       snd_ctl_new1(&amd7930_controls[idx], amd))) < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+static int snd_amd7930_free(struct snd_amd7930 *amd)
+{
+	struct platform_device *op = amd->op;
+
+	amd7930_idle(amd);
+
+	if (amd->irq)
+		free_irq(amd->irq, amd);
+
+	if (amd->regs)
+		of_iounmap(&op->resource[0], amd->regs,
+			   resource_size(&op->resource[0]));
+
+	kfree(amd);
+
+	return 0;
+}
+
+static int snd_amd7930_dev_free(struct snd_device *device)
+{
+	struct snd_amd7930 *amd = device->device_data;
+
+	return snd_amd7930_free(amd);
+}
+
+static const struct snd_device_ops snd_amd7930_dev_ops = {
+	.dev_free	=	snd_amd7930_dev_free,
+};
+
+static int snd_amd7930_create(struct snd_card *card,
+			      struct platform_device *op,
+			      int irq, int dev,
+			      struct snd_amd7930 **ramd)
+{
+	struct snd_amd7930 *amd;
+	unsigned long flags;
+	int err;
+
+	*ramd = NULL;
+	amd = kzalloc(sizeof(*amd), GFP_KERNEL);
+	if (amd == NULL)
+		return -ENOMEM;
+
+	spin_lock_init(&amd->lock);
+	amd->card = card;
+	amd->op = op;
+
+	amd->regs = of_ioremap(&op->resource[0], 0,
+			       resource_size(&op->resource[0]), "amd7930");
+	if (!amd->regs) {
+		snd_printk(KERN_ERR
+			   "amd7930-%d: Unable to map chip registers.\n", dev);
+		kfree(amd);
+		return -EIO;
+	}
+
+	amd7930_idle(amd);
+
+	if (request_irq(irq, snd_amd7930_interrupt,
+			IRQF_SHARED, "amd7930", amd)) {
+		snd_printk(KERN_ERR "amd7930-%d: Unable to grab IRQ %d\n",
+			   dev, irq);
+		snd_amd7930_free(amd);
+		return -EBUSY;
+	}
+	amd->irq = irq;
+
+	amd7930_enable_ints(amd);
+
+	spin_lock_irqsave(&amd->lock, flags);
+
+	amd->rgain = 128;
+	amd->pgain = 200;
+	amd->mgain = 0;
+
+	memset(&amd->map, 0, sizeof(amd->map));
+	amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER |
+			 AM_MAP_MMR1_GR | AM_MAP_MMR1_STG);
+	amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB);
+
+	__amd7930_update_map(amd);
+
+	/* Always MUX audio (Ba) to channel Bb. */
+	sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR);
+	sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4),
+		    amd->regs + AMD7930_DR);
+
+	spin_unlock_irqrestore(&amd->lock, flags);
+
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
+			     amd, &snd_amd7930_dev_ops);
+	if (err < 0) {
+		snd_amd7930_free(amd);
+		return err;
+	}
+
+	*ramd = amd;
+	return 0;
+}
+
+static int amd7930_sbus_probe(struct platform_device *op)
+{
+	struct resource *rp = &op->resource[0];
+	static int dev_num;
+	struct snd_card *card;
+	struct snd_amd7930 *amd;
+	int err, irq;
+
+	irq = op->archdata.irqs[0];
+
+	if (dev_num >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev_num]) {
+		dev_num++;
+		return -ENOENT;
+	}
+
+	err = snd_card_new(&op->dev, index[dev_num], id[dev_num],
+			   THIS_MODULE, 0, &card);
+	if (err < 0)
+		return err;
+
+	strcpy(card->driver, "AMD7930");
+	strcpy(card->shortname, "Sun AMD7930");
+	sprintf(card->longname, "%s at 0x%02lx:0x%08Lx, irq %d",
+		card->shortname,
+		rp->flags & 0xffL,
+		(unsigned long long)rp->start,
+		irq);
+
+	if ((err = snd_amd7930_create(card, op,
+				      irq, dev_num, &amd)) < 0)
+		goto out_err;
+
+	err = snd_amd7930_pcm(amd);
+	if (err < 0)
+		goto out_err;
+
+	err = snd_amd7930_mixer(amd);
+	if (err < 0)
+		goto out_err;
+
+	err = snd_card_register(card);
+	if (err < 0)
+		goto out_err;
+
+	amd->next = amd7930_list;
+	amd7930_list = amd;
+
+	dev_num++;
+
+	return 0;
+
+out_err:
+	snd_card_free(card);
+	return err;
+}
+
+static const struct of_device_id amd7930_match[] = {
+	{
+		.name = "audio",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, amd7930_match);
+
+static struct platform_driver amd7930_sbus_driver = {
+	.driver = {
+		.name = "audio",
+		.of_match_table = amd7930_match,
+	},
+	.probe		= amd7930_sbus_probe,
+};
+
+static int __init amd7930_init(void)
+{
+	return platform_driver_register(&amd7930_sbus_driver);
+}
+
+static void __exit amd7930_exit(void)
+{
+	struct snd_amd7930 *p = amd7930_list;
+
+	while (p != NULL) {
+		struct snd_amd7930 *next = p->next;
+
+		snd_card_free(p->card);
+
+		p = next;
+	}
+
+	amd7930_list = NULL;
+
+	platform_driver_unregister(&amd7930_sbus_driver);
+}
+
+module_init(amd7930_init);
+module_exit(amd7930_exit);