[ALSA] ARM AACI primecell driver

ARM,/arm/Makefile,ARM AACI PL041 driver
Add support for the ARM AACI Primecell, which provides an AC'97
based interface.  This driver only provides playback support.

This has been extensively tested with an LM4549 AC'97 codec.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 246 insertions, 0 deletions

diff --git a/sound/arm/aaci.h b/sound/arm/aaci.h
new file mode 100644
index 00000000000..d752e642689
--- /dev/null
+++ b/sound/arm/aaci.h
@@ -0,0 +1,246 @@
+/*
+ *  linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
+ *
+ *  Copyright (C) 2003 Deep Blue Solutions, Ltd, 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef AACI_H
+#define AACI_H
+
+/*
+ * Control and status register offsets
+ *  P39.
+ */
+#define AACI_CSCH1      0x000
+#define AACI_CSCH2      0x014
+#define AACI_CSCH3      0x028
+#define AACI_CSCH4      0x03c
+
+#define AACI_RXCR       0x000   /* 29 bits Control Rx FIFO */
+#define AACI_TXCR       0x004   /* 17 bits Control Tx FIFO */
+#define AACI_SR         0x008   /* 12 bits Status */
+#define AACI_ISR        0x00c   /* 7 bits  Int Status */
+#define AACI_IE         0x010   /* 7 bits  Int Enable */
+
+/*
+ * Other registers
+ */
+#define AACI_SL1RX      0x050
+#define AACI_SL1TX      0x054
+#define AACI_SL2RX      0x058
+#define AACI_SL2TX      0x05c
+#define AACI_SL12RX     0x060
+#define AACI_SL12TX     0x064
+#define AACI_SLFR       0x068   /* slot flags */
+#define AACI_SLISTAT    0x06c   /* slot interrupt status */
+#define AACI_SLIEN      0x070   /* slot interrupt enable */
+#define AACI_INTCLR     0x074   /* interrupt clear */
+#define AACI_MAINCR     0x078   /* main control */
+#define AACI_RESET      0x07c   /* reset control */
+#define AACI_SYNC       0x080   /* sync control */
+#define AACI_ALLINTS    0x084   /* all fifo interrupt status */
+#define AACI_MAINFR     0x088   /* main flag register */
+#define AACI_DR1        0x090   /* data read/written fifo 1 */
+#define AACI_DR2        0x0b0   /* data read/written fifo 2 */
+#define AACI_DR3        0x0d0   /* data read/written fifo 3 */
+#define AACI_DR4        0x0f0   /* data read/written fifo 4 */
+
+/*
+ * transmit fifo control register. P48
+ */
+#define TXCR_FEN        (1 << 16)       /* fifo enable */
+#define TXCR_COMPACT    (1 << 15)       /* compact mode */
+#define TXCR_TSZ16      (0 << 13)       /* 16 bits */
+#define TXCR_TSZ18      (1 << 13)       /* 18 bits */
+#define TXCR_TSZ20      (2 << 13)       /* 20 bits */
+#define TXCR_TSZ12      (3 << 13)       /* 12 bits */
+#define TXCR_TX12       (1 << 12)       /* transmits slot 12 */
+#define TXCR_TX11       (1 << 11)       /* transmits slot 12 */
+#define TXCR_TX10       (1 << 10)       /* transmits slot 12 */
+#define TXCR_TX9        (1 << 9)        /* transmits slot 12 */
+#define TXCR_TX8        (1 << 8)        /* transmits slot 12 */
+#define TXCR_TX7        (1 << 7)        /* transmits slot 12 */
+#define TXCR_TX6        (1 << 6)        /* transmits slot 12 */
+#define TXCR_TX5        (1 << 5)        /* transmits slot 12 */
+#define TXCR_TX4        (1 << 4)        /* transmits slot 12 */
+#define TXCR_TX3        (1 << 3)        /* transmits slot 12 */
+#define TXCR_TX2        (1 << 2)        /* transmits slot 12 */
+#define TXCR_TX1        (1 << 1)        /* transmits slot 12 */
+#define TXCR_TXEN       (1 << 0)        /* transmit enable */
+
+/*
+ * status register bits. P49
+ */
+#define SR_RXTOFE       (1 << 11)       /* rx timeout fifo empty */
+#define SR_TXTO         (1 << 10)       /* rx timeout fifo nonempty */
+#define SR_TXU          (1 << 9)        /* tx underrun */
+#define SR_RXO          (1 << 8)        /* rx overrun */
+#define SR_TXB          (1 << 7)        /* tx busy */
+#define SR_RXB          (1 << 6)        /* rx busy */
+#define SR_TXFF         (1 << 5)        /* tx fifo full */
+#define SR_RXFF         (1 << 4)        /* rx fifo full */
+#define SR_TXHE         (1 << 3)        /* tx fifo half empty */
+#define SR_RXHF         (1 << 2)        /* rx fifo half full */
+#define SR_TXFE         (1 << 1)        /* tx fifo empty */
+#define SR_RXFE         (1 << 0)        /* rx fifo empty */
+
+/*
+ * interrupt status register bits.
+ */
+#define ISR_RXTOFEINTR  (1 << 6)        /* rx fifo empty */
+#define ISR_URINTR      (1 << 5)        /* tx underflow */
+#define ISR_ORINTR      (1 << 4)        /* rx overflow */
+#define ISR_RXINTR      (1 << 3)        /* rx fifo */
+#define ISR_TXINTR      (1 << 2)        /* tx fifo intr */
+#define ISR_RXTOINTR    (1 << 1)        /* tx timeout */
+#define ISR_TXCINTR     (1 << 0)        /* tx complete */
+
+/*
+ * interrupt enable register bits.
+ */
+#define IE_RXTOIE       (1 << 6)
+#define IE_URIE         (1 << 5)
+#define IE_ORIE         (1 << 4)
+#define IE_RXIE         (1 << 3)
+#define IE_TXIE         (1 << 2)
+#define IE_RXTIE        (1 << 1)
+#define IE_TXCIE        (1 << 0)
+
+/*
+ * interrupt status. P51
+ */
+#define ISR_RXTOFE      (1 << 6)        /* rx timeout fifo empty */
+#define ISR_UR          (1 << 5)        /* tx fifo underrun */
+#define ISR_OR          (1 << 4)        /* rx fifo overrun */
+#define ISR_RX          (1 << 3)        /* rx interrupt status */
+#define ISR_TX          (1 << 2)        /* tx interrupt status */
+#define ISR_RXTO        (1 << 1)        /* rx timeout */
+#define ISR_TXC         (1 << 0)        /* tx complete */
+
+/*
+ * interrupt enable. P52
+ */
+#define IE_RXTOFE       (1 << 6)        /* rx timeout fifo empty */
+#define IE_UR           (1 << 5)        /* tx fifo underrun */
+#define IE_OR           (1 << 4)        /* rx fifo overrun */
+#define IE_RX           (1 << 3)        /* rx interrupt status */
+#define IE_TX           (1 << 2)        /* tx interrupt status */
+#define IE_RXTO         (1 << 1)        /* rx timeout */
+#define IE_TXC          (1 << 0)        /* tx complete */
+
+/*
+ * slot flag register bits. P56
+ */
+#define SLFR_RWIS       (1 << 13)       /* raw wake-up interrupt status */
+#define SLFR_RGPIOINTR  (1 << 12)       /* raw gpio interrupt */
+#define SLFR_12TXE      (1 << 11)       /* slot 12 tx empty */
+#define SLFR_12RXV      (1 << 10)       /* slot 12 rx valid */
+#define SLFR_2TXE       (1 << 9)        /* slot 2 tx empty */
+#define SLFR_2RXV       (1 << 8)        /* slot 2 rx valid */
+#define SLFR_1TXE       (1 << 7)        /* slot 1 tx empty */
+#define SLFR_1RXV       (1 << 6)        /* slot 1 rx valid */
+#define SLFR_12TXB      (1 << 5)        /* slot 12 tx busy */
+#define SLFR_12RXB      (1 << 4)        /* slot 12 rx busy */
+#define SLFR_2TXB       (1 << 3)        /* slot 2 tx busy */
+#define SLFR_2RXB       (1 << 2)        /* slot 2 rx busy */
+#define SLFR_1TXB       (1 << 1)        /* slot 1 tx busy */
+#define SLFR_1RXB       (1 << 0)        /* slot 1 rx busy */
+
+/*
+ * Interrupt clear register.
+ */
+#define ICLR_RXTOFEC4   (1 << 12)
+#define ICLR_RXTOFEC3   (1 << 11)
+#define ICLR_RXTOFEC2   (1 << 10)
+#define ICLR_RXTOFEC1   (1 << 9)
+#define ICLR_TXUEC4     (1 << 8)
+#define ICLR_TXUEC3     (1 << 7)
+#define ICLR_TXUEC2     (1 << 6)
+#define ICLR_TXUEC1     (1 << 5)
+#define ICLR_RXOEC4     (1 << 4)
+#define ICLR_RXOEC3     (1 << 3)
+#define ICLR_RXOEC2     (1 << 2)
+#define ICLR_RXOEC1     (1 << 1)
+#define ICLR_WISC       (1 << 0)
+
+/*
+ * Main control register bits. P62
+ */
+#define MAINCR_SCRA(x)  ((x) << 10)     /* secondary codec reg access */
+#define MAINCR_DMAEN    (1 << 9)        /* dma enable */
+#define MAINCR_SL12TXEN (1 << 8)        /* slot 12 transmit enable */
+#define MAINCR_SL12RXEN (1 << 7)        /* slot 12 receive enable */
+#define MAINCR_SL2TXEN  (1 << 6)        /* slot 2 transmit enable */
+#define MAINCR_SL2RXEN  (1 << 5)        /* slot 2 receive enable */
+#define MAINCR_SL1TXEN  (1 << 4)        /* slot 1 transmit enable */
+#define MAINCR_SL1RXEN  (1 << 3)        /* slot 1 receive enable */
+#define MAINCR_LPM      (1 << 2)        /* low power mode */
+#define MAINCR_LOOPBK   (1 << 1)        /* loopback */
+#define MAINCR_IE       (1 << 0)        /* aaci interface enable */
+
+/*
+ * Reset register bits. P65
+ */
+#define RESET_NRST      (1 << 0)
+
+/*
+ * Sync register bits. P65
+ */
+#define SYNC_FORCE      (1 << 0)
+
+/*
+ * Main flag register bits. P66
+ */
+#define MAINFR_TXB      (1 << 1)        /* transmit busy */
+#define MAINFR_RXB      (1 << 0)        /* receive busy */
+
+
+
+struct aaci_runtime {
+        void                    *base;
+        void                    *fifo;
+
+        struct ac97_pcm         *pcm;
+        int                     pcm_open;
+
+        u32                     cr;
+        snd_pcm_substream_t     *substream;
+
+        /*
+         * PIO support
+         */
+        void                    *start;
+        void                    *end;
+        void                    *ptr;
+        int                     bytes;
+        unsigned int            period;
+        unsigned int            fifosz;
+};
+
+struct aaci {
+        struct amba_device      *dev;
+        snd_card_t              *card;
+        void                    *base;
+        unsigned int            fifosize;
+
+        /* AC'97 */
+        struct semaphore        ac97_sem;
+        ac97_bus_t              *ac97_bus;
+
+        u32                     maincr;
+        spinlock_t              lock;
+
+        struct aaci_runtime     playback;
+        struct aaci_runtime     capture;
+
+        snd_pcm_t               *pcm;
+};
+
+#define ACSTREAM_FRONT          0
+#define ACSTREAM_SURROUND       1
+#define ACSTREAM_LFE            2
+
+#endif