4 files changed, 358 insertions, 0 deletions

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 1918c78b858e..3bce952d7c5f 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -29,3 +29,14 @@ config SND_SOC_MPC5200_I2S
         select PPC_BESTCOMM_GEN_BD
         help
           Say Y here to support the MPC5200 PSCs in I2S mode.
+
+config SND_SOC_MPC5200_AC97
+        tristate "Freescale MPC5200 PSC in AC97 mode driver"
+        depends on PPC_MPC52xx && PPC_BESTCOMM
+        select AC97_BUS
+        select SND_MPC52xx_DMA
+        select PPC_BESTCOMM_GEN_BD
+        help
+          Say Y here to support the MPC5200 PSCs in AC97 mode.
+
+
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 7731ef2539bb..14631a1732eb 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -13,4 +13,5 @@ obj-$(CONFIG_SND_SOC_MPC8610) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
 # MPC5200 Platform Support
 obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o
 obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o
+obj-$(CONFIG_SND_SOC_MPC5200_AC97) += mpc5200_psc_ac97.o
 
diff --git a/sound/soc/fsl/mpc5200_psc_ac97.c b/sound/soc/fsl/mpc5200_psc_ac97.c
new file mode 100644
index 000000000000..9f2df1552f02
--- /dev/null
+++ b/sound/soc/fsl/mpc5200_psc_ac97.c
@@ -0,0 +1,331 @@
+/*
+ * linux/sound/mpc5200-ac97.c -- AC97 support for the Freescale MPC52xx chip.
+ *
+ * Copyright (C) 2009 Jon Smirl, Digispeaker
+ * Author: Jon Smirl <jonsmirl@gmail.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <asm/time.h>
+#include <asm/delay.h>
+#include <asm/mpc52xx_psc.h>
+
+#include "mpc5200_dma.h"
+#include "mpc5200_psc_ac97.h"
+
+#define DRV_NAME "mpc5200-psc-ac97"
+
+/* ALSA only supports a single AC97 device so static is recommend here */
+static struct psc_dma *psc_dma;
+
+static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
+{
+        int rc;
+        unsigned int val;
+
+        /* Wait for command send status zero = ready */
+        spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
+                                MPC52xx_PSC_SR_CMDSEND), 100, 0, rc);
+        if (rc == 0) {
+                pr_err("timeout on ac97 bus (rdy)\n");
+                return -ENODEV;
+        }
+        /* Send the read */
+        out_be32(&psc_dma->psc_regs->ac97_cmd, (1<<31) | ((reg & 0x7f) << 24));
+
+        /* Wait for the answer */
+        spin_event_timeout((in_be16(&psc_dma->psc_regs->sr_csr.status) &
+                                MPC52xx_PSC_SR_DATA_VAL), 100, 0, rc);
+        if (rc == 0) {
+                pr_err("timeout on ac97 read (val) %x\n",
+                                in_be16(&psc_dma->psc_regs->sr_csr.status));
+                return -ENODEV;
+        }
+        /* Get the data */
+        val = in_be32(&psc_dma->psc_regs->ac97_data);
+        if (((val >> 24) & 0x7f) != reg) {
+                pr_err("reg echo error on ac97 read\n");
+                return -ENODEV;
+        }
+        val = (val >> 8) & 0xffff;
+
+        return (unsigned short) val;
+}
+
+static void psc_ac97_write(struct snd_ac97 *ac97,
+                                unsigned short reg, unsigned short val)
+{
+        int rc;
+
+        /* Wait for command status zero = ready */
+        spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
+                                MPC52xx_PSC_SR_CMDSEND), 100, 0, rc);
+        if (rc == 0) {
+                pr_err("timeout on ac97 bus (write)\n");
+                return;
+        }
+        /* Write data */
+        out_be32(&psc_dma->psc_regs->ac97_cmd,
+                        ((reg & 0x7f) << 24) | (val << 8));
+}
+
+static void psc_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+        int rc;
+        struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
+
+        out_be32(&regs->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_AWR);
+        spin_event_timeout(0, 3, 0, rc);
+        out_be32(&regs->sicr, psc_dma->sicr);
+}
+
+static void psc_ac97_cold_reset(struct snd_ac97 *ac97)
+{
+        int rc;
+        struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
+
+        /* Do a cold reset */
+        out_8(&regs->op1, MPC52xx_PSC_OP_RES);
+        spin_event_timeout(0, 10, 0, rc);
+        out_8(&regs->op0, MPC52xx_PSC_OP_RES);
+        spin_event_timeout(0, 50, 0, rc);
+        psc_ac97_warm_reset(ac97);
+}
+
+struct snd_ac97_bus_ops soc_ac97_ops = {
+        .read           = psc_ac97_read,
+        .write          = psc_ac97_write,
+        .reset          = psc_ac97_cold_reset,
+        .warm_reset     = psc_ac97_warm_reset,
+};
+EXPORT_SYMBOL_GPL(soc_ac97_ops);
+
+static int psc_ac97_hw_analog_params(struct snd_pcm_substream *substream,
+                                 struct snd_pcm_hw_params *params,
+                                 struct snd_soc_dai *cpu_dai)
+{
+        struct psc_dma *psc_dma = cpu_dai->private_data;
+
+        dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
+                " periods=%i buffer_size=%i  buffer_bytes=%i channels=%i"
+                " rate=%i format=%i\n",
+                __func__, substream, params_period_size(params),
+                params_period_bytes(params), params_periods(params),
+                params_buffer_size(params), params_buffer_bytes(params),
+                params_channels(params), params_rate(params),
+                params_format(params));
+
+
+        if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
+                if (params_channels(params) == 1)
+                        psc_dma->slots |= 0x00000100;
+                else
+                        psc_dma->slots |= 0x00000300;
+        } else {
+                if (params_channels(params) == 1)
+                        psc_dma->slots |= 0x01000000;
+                else
+                        psc_dma->slots |= 0x03000000;
+        }
+        out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
+
+        return 0;
+}
+
+static int psc_ac97_hw_digital_params(struct snd_pcm_substream *substream,
+                                 struct snd_pcm_hw_params *params,
+                                 struct snd_soc_dai *cpu_dai)
+{
+        struct psc_dma *psc_dma = cpu_dai->private_data;
+
+        if (params_channels(params) == 1)
+                out_be32(&psc_dma->psc_regs->ac97_slots, 0x01000000);
+        else
+                out_be32(&psc_dma->psc_regs->ac97_slots, 0x03000000);
+
+        return 0;
+}
+
+static int psc_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
+                                                        struct snd_soc_dai *dai)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
+
+        switch (cmd) {
+        case SNDRV_PCM_TRIGGER_STOP:
+                if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
+                        psc_dma->slots &= 0xFFFF0000;
+                else
+                        psc_dma->slots &= 0x0000FFFF;
+
+                out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
+                break;
+        }
+        return 0;
+}
+
+static int psc_ac97_probe(struct platform_device *pdev,
+                                        struct snd_soc_dai *cpu_dai)
+{
+        struct psc_dma *psc_dma = cpu_dai->private_data;
+        struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
+
+        /* Go */
+        out_8(&regs->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
+        return 0;
+}
+
+/* ---------------------------------------------------------------------
+ * ALSA SoC Bindings
+ *
+ * - Digital Audio Interface (DAI) template
+ * - create/destroy dai hooks
+ */
+
+/**
+ * psc_ac97_dai_template: template CPU Digital Audio Interface
+ */
+static struct snd_soc_dai_ops psc_ac97_analog_ops = {
+        .hw_params      = psc_ac97_hw_analog_params,
+        .trigger        = psc_ac97_trigger,
+};
+
+static struct snd_soc_dai_ops psc_ac97_digital_ops = {
+        .hw_params      = psc_ac97_hw_digital_params,
+};
+
+struct snd_soc_dai psc_ac97_dai[] = {
+{
+        .name   = "AC97",
+        .ac97_control = 1,
+        .probe  = psc_ac97_probe,
+        .playback = {
+                .channels_min   = 1,
+                .channels_max   = 6,
+                .rates          = SNDRV_PCM_RATE_8000_48000,
+                .formats = SNDRV_PCM_FMTBIT_S32_BE,
+        },
+        .capture = {
+                .channels_min   = 1,
+                .channels_max   = 2,
+                .rates          = SNDRV_PCM_RATE_8000_48000,
+                .formats = SNDRV_PCM_FMTBIT_S32_BE,
+        },
+        .ops = &psc_ac97_analog_ops,
+},
+{
+        .name   = "SPDIF",
+        .ac97_control = 1,
+        .playback = {
+                .channels_min   = 1,
+                .channels_max   = 2,
+                .rates          = SNDRV_PCM_RATE_32000 | \
+                        SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
+                .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
+        },
+        .ops = &psc_ac97_digital_ops,
+} };
+EXPORT_SYMBOL_GPL(psc_ac97_dai);
+
+
+
+/* ---------------------------------------------------------------------
+ * OF platform bus binding code:
+ * - Probe/remove operations
+ * - OF device match table
+ */
+static int __devinit psc_ac97_of_probe(struct of_device *op,
+                                      const struct of_device_id *match)
+{
+        int rc, i;
+        struct snd_ac97 ac97;
+        struct mpc52xx_psc __iomem *regs;
+
+        rc = mpc5200_audio_dma_create(op);
+        if (rc != 0)
+                return rc;
+
+        for (i = 0; i < ARRAY_SIZE(psc_ac97_dai); i++)
+                psc_ac97_dai[i].dev = &op->dev;
+
+        rc = snd_soc_register_dais(psc_ac97_dai, ARRAY_SIZE(psc_ac97_dai));
+        if (rc != 0) {
+                dev_err(&op->dev, "Failed to register DAI\n");
+                return rc;
+        }
+
+        psc_dma = dev_get_drvdata(&op->dev);
+        regs = psc_dma->psc_regs;
+        ac97.private_data = psc_dma;
+
+        for (i = 0; i < ARRAY_SIZE(psc_ac97_dai); i++)
+                psc_ac97_dai[i].private_data = psc_dma;
+
+        psc_dma->imr = 0;
+        out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr);
+
+        /* Configure the serial interface mode to AC97 */
+        psc_dma->sicr = MPC52xx_PSC_SICR_SIM_AC97 | MPC52xx_PSC_SICR_ENAC97;
+        out_be32(&regs->sicr, psc_dma->sicr);
+
+        /* No slots active */
+        out_be32(&regs->ac97_slots, 0x00000000);
+
+        return 0;
+}
+
+static int __devexit psc_ac97_of_remove(struct of_device *op)
+{
+        return mpc5200_audio_dma_destroy(op);
+}
+
+/* Match table for of_platform binding */
+static struct of_device_id psc_ac97_match[] __devinitdata = {
+        { .compatible = "fsl,mpc5200-psc-ac97", },
+        { .compatible = "fsl,mpc5200b-psc-ac97", },
+        {}
+};
+MODULE_DEVICE_TABLE(of, psc_ac97_match);
+
+static struct of_platform_driver psc_ac97_driver = {
+        .match_table = psc_ac97_match,
+        .probe = psc_ac97_of_probe,
+        .remove = __devexit_p(psc_ac97_of_remove),
+        .driver = {
+                .name = "mpc5200-psc-ac97",
+                .owner = THIS_MODULE,
+        },
+};
+
+/* ---------------------------------------------------------------------
+ * Module setup and teardown; simply register the of_platform driver
+ * for the PSC in AC97 mode.
+ */
+static int __init psc_ac97_init(void)
+{
+        return of_register_platform_driver(&psc_ac97_driver);
+}
+module_init(psc_ac97_init);
+
+static void __exit psc_ac97_exit(void)
+{
+        of_unregister_platform_driver(&psc_ac97_driver);
+}
+module_exit(psc_ac97_exit);
+
+MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
+MODULE_DESCRIPTION("mpc5200 AC97 module");
+MODULE_LICENSE("GPL");
+
diff --git a/sound/soc/fsl/mpc5200_psc_ac97.h b/sound/soc/fsl/mpc5200_psc_ac97.h
new file mode 100644
index 000000000000..4bc18c35c369
--- /dev/null
+++ b/sound/soc/fsl/mpc5200_psc_ac97.h
@@ -0,0 +1,15 @@
+/*
+ * Freescale MPC5200 PSC in AC97 mode
+ * ALSA SoC Digital Audio Interface (DAI) driver
+ *
+ */
+
+#ifndef __SOUND_SOC_FSL_MPC52xx_PSC_AC97_H__
+#define __SOUND_SOC_FSL_MPC52xx_PSC_AC97_H__
+
+extern struct snd_soc_dai psc_ac97_dai[];
+
+#define MPC5200_AC97_NORMAL 0
+#define MPC5200_AC97_SPDIF 1
+
+#endif /* __SOUND_SOC_FSL_MPC52xx_PSC_AC97_H__ */