ASoC: add DAI and platform / DMA drivers for SH SIU

Several SuperH platforms, including sh7722, sh7343, sh7354, sh7367 include
a Sound Interface Unit (SIU). This patch adds DAI and platform / DMA
drivers for this interface.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 847 insertions, 0 deletions

diff --git a/sound/soc/sh/siu_dai.c b/sound/soc/sh/siu_dai.c
new file mode 100644
index 000000000000..5452d19607e1
--- /dev/null
+++ b/sound/soc/sh/siu_dai.c
@@ -0,0 +1,847 @@
+/*
+ * siu_dai.c - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
+ *
+ * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
+
+#include <asm/clock.h>
+#include <asm/siu.h>
+
+#include <sound/control.h>
+#include <sound/soc-dai.h>
+
+#include "siu.h"
+
+/* Board specifics */
+#if defined(CONFIG_CPU_SUBTYPE_SH7722)
+# define SIU_MAX_VOLUME         0x1000
+#else
+# define SIU_MAX_VOLUME         0x7fff
+#endif
+
+#define PRAM_SIZE       0x2000
+#define XRAM_SIZE       0x800
+#define YRAM_SIZE       0x800
+
+#define XRAM_OFFSET     0x4000
+#define YRAM_OFFSET     0x6000
+#define REG_OFFSET      0xc000
+
+#define PLAYBACK_ENABLED        1
+#define CAPTURE_ENABLED         2
+
+#define VOLUME_CAPTURE          0
+#define VOLUME_PLAYBACK         1
+#define DFLT_VOLUME_LEVEL       0x08000800
+
+/*
+ * SPDIF is only available on port A and on some SIU implementations it is only
+ * available for input. Due to the lack of hardware to test it, SPDIF is left
+ * disabled in this driver version
+ */
+struct format_flag {
+        u32     i2s;
+        u32     pcm;
+        u32     spdif;
+        u32     mask;
+};
+
+struct port_flag {
+        struct format_flag      playback;
+        struct format_flag      capture;
+};
+
+static struct port_flag siu_flags[SIU_PORT_NUM] = {
+        [SIU_PORT_A] = {
+                .playback = {
+                        .i2s    = 0x50000000,
+                        .pcm    = 0x40000000,
+                        .spdif  = 0x80000000,   /* not on all SIU versions */
+                        .mask   = 0xd0000000,
+                },
+                .capture = {
+                        .i2s    = 0x05000000,
+                        .pcm    = 0x04000000,
+                        .spdif  = 0x08000000,
+                        .mask   = 0x0d000000,
+                },
+        },
+        [SIU_PORT_B] = {
+                .playback = {
+                        .i2s    = 0x00500000,
+                        .pcm    = 0x00400000,
+                        .spdif  = 0,            /* impossible - turn off */
+                        .mask   = 0x00500000,
+                },
+                .capture = {
+                        .i2s    = 0x00050000,
+                        .pcm    = 0x00040000,
+                        .spdif  = 0,            /* impossible - turn off */
+                        .mask   = 0x00050000,
+                },
+        },
+};
+
+static void siu_dai_start(struct siu_port *port_info)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+
+        dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
+
+        /* Turn on SIU clock */
+        pm_runtime_get_sync(siu_i2s_dai.dev);
+
+        /* Issue software reset to siu */
+        siu_write32(base + SIU_SRCTL, 0);
+
+        /* Wait for the reset to take effect */
+        udelay(1);
+
+        port_info->stfifo = 0;
+        port_info->trdat = 0;
+
+        /* portA, portB, SIU operate */
+        siu_write32(base + SIU_SRCTL, 0x301);
+
+        /* portA=256fs, portB=256fs */
+        siu_write32(base + SIU_CKCTL, 0x40400000);
+
+        /* portA's BRG does not divide SIUCKA */
+        siu_write32(base + SIU_BRGASEL, 0);
+        siu_write32(base + SIU_BRRA, 0);
+
+        /* portB's BRG divides SIUCKB by half */
+        siu_write32(base + SIU_BRGBSEL, 1);
+        siu_write32(base + SIU_BRRB, 0);
+
+        siu_write32(base + SIU_IFCTL, 0x44440000);
+
+        /* portA: 32 bit/fs, master; portB: 32 bit/fs, master */
+        siu_write32(base + SIU_SFORM, 0x0c0c0000);
+
+        /*
+         * Volume levels: looks like the DSP firmware implements volume controls
+         * differently from what's described in the datasheet
+         */
+        siu_write32(base + SIU_SBDVCA, port_info->playback.volume);
+        siu_write32(base + SIU_SBDVCB, port_info->capture.volume);
+}
+
+static void siu_dai_stop(void)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+
+        /* SIU software reset */
+        siu_write32(base + SIU_SRCTL, 0);
+
+        /* Turn off SIU clock */
+        pm_runtime_put_sync(siu_i2s_dai.dev);
+}
+
+static void siu_dai_spbAselect(struct siu_port *port_info)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        struct siu_firmware *fw = &info->fw;
+        u32 *ydef = fw->yram0;
+        u32 idx;
+
+        /* path A use */
+        if (!info->port_id)
+                idx = 1;                /* portA */
+        else
+                idx = 2;                /* portB */
+
+        ydef[0] = (fw->spbpar[idx].ab1a << 16) |
+                (fw->spbpar[idx].ab0a << 8) |
+                (fw->spbpar[idx].dir << 7) | 3;
+        ydef[1] = fw->yram0[1]; /* 0x03000300 */
+        ydef[2] = (16 / 2) << 24;
+        ydef[3] = fw->yram0[3]; /* 0 */
+        ydef[4] = fw->yram0[4]; /* 0 */
+        ydef[7] = fw->spbpar[idx].event;
+        port_info->stfifo |= fw->spbpar[idx].stfifo;
+        port_info->trdat |= fw->spbpar[idx].trdat;
+}
+
+static void siu_dai_spbBselect(struct siu_port *port_info)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        struct siu_firmware *fw = &info->fw;
+        u32 *ydef = fw->yram0;
+        u32 idx;
+
+        /* path B use */
+        if (!info->port_id)
+                idx = 7;                /* portA */
+        else
+                idx = 8;                /* portB */
+
+        ydef[5] = (fw->spbpar[idx].ab1a << 16) |
+                (fw->spbpar[idx].ab0a << 8) | 1;
+        ydef[6] = fw->spbpar[idx].event;
+        port_info->stfifo |= fw->spbpar[idx].stfifo;
+        port_info->trdat |= fw->spbpar[idx].trdat;
+}
+
+static void siu_dai_open(struct siu_stream *siu_stream)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+        u32 srctl, ifctl;
+
+        srctl = siu_read32(base + SIU_SRCTL);
+        ifctl = siu_read32(base + SIU_IFCTL);
+
+        switch (info->port_id) {
+        case SIU_PORT_A:
+                /* portA operates */
+                srctl |= 0x200;
+                ifctl &= ~0xc2;
+                break;
+        case SIU_PORT_B:
+                /* portB operates */
+                srctl |= 0x100;
+                ifctl &= ~0x31;
+                break;
+        }
+
+        siu_write32(base + SIU_SRCTL, srctl);
+        /* Unmute and configure portA */
+        siu_write32(base + SIU_IFCTL, ifctl);
+}
+
+/*
+ * At the moment only fixed Left-upper, Left-lower, Right-upper, Right-lower
+ * packing is supported
+ */
+static void siu_dai_pcmdatapack(struct siu_stream *siu_stream)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+        u32 dpak;
+
+        dpak = siu_read32(base + SIU_DPAK);
+
+        switch (info->port_id) {
+        case SIU_PORT_A:
+                dpak &= ~0xc0000000;
+                break;
+        case SIU_PORT_B:
+                dpak &= ~0x00c00000;
+                break;
+        }
+
+        siu_write32(base + SIU_DPAK, dpak);
+}
+
+static int siu_dai_spbstart(struct siu_port *port_info)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+        struct siu_firmware *fw = &info->fw;
+        u32 *ydef = fw->yram0;
+        int cnt;
+        u32 __iomem *add;
+        u32 *ptr;
+
+        /* Load SPB Program in PRAM */
+        ptr = fw->pram0;
+        add = info->pram;
+        for (cnt = 0; cnt < PRAM0_SIZE; cnt++, add++, ptr++)
+                siu_write32(add, *ptr);
+
+        ptr = fw->pram1;
+        add = info->pram + (0x0100 / sizeof(u32));
+        for (cnt = 0; cnt < PRAM1_SIZE; cnt++, add++, ptr++)
+                siu_write32(add, *ptr);
+
+        /* XRAM initialization */
+        add = info->xram;
+        for (cnt = 0; cnt < XRAM0_SIZE + XRAM1_SIZE + XRAM2_SIZE; cnt++, add++)
+                siu_write32(add, 0);
+
+        /* YRAM variable area initialization */
+        add = info->yram;
+        for (cnt = 0; cnt < YRAM_DEF_SIZE; cnt++, add++)
+                siu_write32(add, ydef[cnt]);
+
+        /* YRAM FIR coefficient area initialization */
+        add = info->yram + (0x0200 / sizeof(u32));
+        for (cnt = 0; cnt < YRAM_FIR_SIZE; cnt++, add++)
+                siu_write32(add, fw->yram_fir_coeff[cnt]);
+
+        /* YRAM IIR coefficient area initialization */
+        add = info->yram + (0x0600 / sizeof(u32));
+        for (cnt = 0; cnt < YRAM_IIR_SIZE; cnt++, add++)
+                siu_write32(add, 0);
+
+        siu_write32(base + SIU_TRDAT, port_info->trdat);
+        port_info->trdat = 0x0;
+
+
+        /* SPB start condition: software */
+        siu_write32(base + SIU_SBACTIV, 0);
+        /* Start SPB */
+        siu_write32(base + SIU_SBCTL, 0xc0000000);
+        /* Wait for program to halt */
+        cnt = 0x10000;
+        while (--cnt && siu_read32(base + SIU_SBCTL) != 0x80000000)
+                cpu_relax();
+
+        if (!cnt)
+                return -EBUSY;
+
+        /* SPB program start address setting */
+        siu_write32(base + SIU_SBPSET, 0x00400000);
+        /* SPB hardware start(FIFOCTL source) */
+        siu_write32(base + SIU_SBACTIV, 0xc0000000);
+
+        return 0;
+}
+
+static void siu_dai_spbstop(struct siu_port *port_info)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+
+        siu_write32(base + SIU_SBACTIV, 0);
+        /* SPB stop */
+        siu_write32(base + SIU_SBCTL, 0);
+
+        port_info->stfifo = 0;
+}
+
+/*              API functions           */
+
+/* Playback and capture hardware properties are identical */
+static struct snd_pcm_hardware siu_dai_pcm_hw = {
+        .info                   = SNDRV_PCM_INFO_INTERLEAVED,
+        .formats                = SNDRV_PCM_FMTBIT_S16,
+        .rates                  = SNDRV_PCM_RATE_8000_48000,
+        .rate_min               = 8000,
+        .rate_max               = 48000,
+        .channels_min           = 2,
+        .channels_max           = 2,
+        .buffer_bytes_max       = SIU_BUFFER_BYTES_MAX,
+        .period_bytes_min       = SIU_PERIOD_BYTES_MIN,
+        .period_bytes_max       = SIU_PERIOD_BYTES_MAX,
+        .periods_min            = SIU_PERIODS_MIN,
+        .periods_max            = SIU_PERIODS_MAX,
+};
+
+static int siu_dai_info_volume(struct snd_kcontrol *kctrl,
+                               struct snd_ctl_elem_info *uinfo)
+{
+        struct siu_port *port_info = snd_kcontrol_chip(kctrl);
+
+        dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
+
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 2;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = SIU_MAX_VOLUME;
+
+        return 0;
+}
+
+static int siu_dai_get_volume(struct snd_kcontrol *kctrl,
+                              struct snd_ctl_elem_value *ucontrol)
+{
+        struct siu_port *port_info = snd_kcontrol_chip(kctrl);
+        struct device *dev = port_info->pcm->card->dev;
+        u32 vol;
+
+        dev_dbg(dev, "%s\n", __func__);
+
+        switch (kctrl->private_value) {
+        case VOLUME_PLAYBACK:
+                /* Playback is always on port 0 */
+                vol = port_info->playback.volume;
+                ucontrol->value.integer.value[0] = vol & 0xffff;
+                ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
+                break;
+        case VOLUME_CAPTURE:
+                /* Capture is always on port 1 */
+                vol = port_info->capture.volume;
+                ucontrol->value.integer.value[0] = vol & 0xffff;
+                ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
+                break;
+        default:
+                dev_err(dev, "%s() invalid private_value=%ld\n",
+                        __func__, kctrl->private_value);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static int siu_dai_put_volume(struct snd_kcontrol *kctrl,
+                              struct snd_ctl_elem_value *ucontrol)
+{
+        struct siu_port *port_info = snd_kcontrol_chip(kctrl);
+        struct device *dev = port_info->pcm->card->dev;
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+        u32 new_vol;
+        u32 cur_vol;
+
+        dev_dbg(dev, "%s\n", __func__);
+
+        if (ucontrol->value.integer.value[0] < 0 ||
+            ucontrol->value.integer.value[0] > SIU_MAX_VOLUME ||
+            ucontrol->value.integer.value[1] < 0 ||
+            ucontrol->value.integer.value[1] > SIU_MAX_VOLUME)
+                return -EINVAL;
+
+        new_vol = ucontrol->value.integer.value[0] |
+                ucontrol->value.integer.value[1] << 16;
+
+        /* See comment above - DSP firmware implementation */
+        switch (kctrl->private_value) {
+        case VOLUME_PLAYBACK:
+                /* Playback is always on port 0 */
+                cur_vol = port_info->playback.volume;
+                siu_write32(base + SIU_SBDVCA, new_vol);
+                port_info->playback.volume = new_vol;
+                break;
+        case VOLUME_CAPTURE:
+                /* Capture is always on port 1 */
+                cur_vol = port_info->capture.volume;
+                siu_write32(base + SIU_SBDVCB, new_vol);
+                port_info->capture.volume = new_vol;
+                break;
+        default:
+                dev_err(dev, "%s() invalid private_value=%ld\n",
+                        __func__, kctrl->private_value);
+                return -EINVAL;
+        }
+
+        if (cur_vol != new_vol)
+                return 1;
+
+        return 0;
+}
+
+static struct snd_kcontrol_new playback_controls = {
+        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name           = "PCM Playback Volume",
+        .index          = 0,
+        .info           = siu_dai_info_volume,
+        .get            = siu_dai_get_volume,
+        .put            = siu_dai_put_volume,
+        .private_value  = VOLUME_PLAYBACK,
+};
+
+static struct snd_kcontrol_new capture_controls = {
+        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name           = "PCM Capture Volume",
+        .index          = 0,
+        .info           = siu_dai_info_volume,
+        .get            = siu_dai_get_volume,
+        .put            = siu_dai_put_volume,
+        .private_value  = VOLUME_CAPTURE,
+};
+
+int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card)
+{
+        struct device *dev = card->dev;
+        struct snd_kcontrol *kctrl;
+        int ret;
+
+        *port_info = kzalloc(sizeof(**port_info), GFP_KERNEL);
+        if (!*port_info)
+                return -ENOMEM;
+
+        dev_dbg(dev, "%s: port #%d@%p\n", __func__, port, *port_info);
+
+        (*port_info)->playback.volume = DFLT_VOLUME_LEVEL;
+        (*port_info)->capture.volume = DFLT_VOLUME_LEVEL;
+
+        /*
+         * Add mixer support. The SPB is used to change the volume. Both
+         * ports use the same SPB. Therefore, we only register one
+         * control instance since it will be used by both channels.
+         * In error case we continue without controls.
+         */
+        kctrl = snd_ctl_new1(&playback_controls, *port_info);
+        ret = snd_ctl_add(card, kctrl);
+        if (ret < 0)
+                dev_err(dev,
+                        "failed to add playback controls %p port=%d err=%d\n",
+                        kctrl, port, ret);
+
+        kctrl = snd_ctl_new1(&capture_controls, *port_info);
+        ret = snd_ctl_add(card, kctrl);
+        if (ret < 0)
+                dev_err(dev,
+                        "failed to add capture controls %p port=%d err=%d\n",
+                        kctrl, port, ret);
+
+        return 0;
+}
+
+void siu_free_port(struct siu_port *port_info)
+{
+        kfree(port_info);
+}
+
+static int siu_dai_startup(struct snd_pcm_substream *substream,
+                           struct snd_soc_dai *dai)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        struct snd_pcm_runtime *rt = substream->runtime;
+        struct siu_port *port_info = siu_port_info(substream);
+        int ret;
+
+        dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
+                info->port_id, port_info);
+
+        snd_soc_set_runtime_hwparams(substream, &siu_dai_pcm_hw);
+
+        ret = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
+        if (unlikely(ret < 0))
+                return ret;
+
+        siu_dai_start(port_info);
+
+        return 0;
+}
+
+static void siu_dai_shutdown(struct snd_pcm_substream *substream,
+                             struct snd_soc_dai *dai)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        struct siu_port *port_info = siu_port_info(substream);
+
+        dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
+                info->port_id, port_info);
+
+        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                port_info->play_cap &= ~PLAYBACK_ENABLED;
+        else
+                port_info->play_cap &= ~CAPTURE_ENABLED;
+
+        /* Stop the siu if the other stream is not using it */
+        if (!port_info->play_cap) {
+                /* during stmread or stmwrite ? */
+                BUG_ON(port_info->playback.rw_flg || port_info->capture.rw_flg);
+                siu_dai_spbstop(port_info);
+                siu_dai_stop();
+        }
+}
+
+/* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */
+static int siu_dai_prepare(struct snd_pcm_substream *substream,
+                           struct snd_soc_dai *dai)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        struct snd_pcm_runtime *rt = substream->runtime;
+        struct siu_port *port_info = siu_port_info(substream);
+        struct siu_stream *siu_stream;
+        int self, ret;
+
+        dev_dbg(substream->pcm->card->dev,
+                "%s: port %d, active streams %lx, %d channels\n",
+                __func__, info->port_id, port_info->play_cap, rt->channels);
+
+        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+                self = PLAYBACK_ENABLED;
+                siu_stream = &port_info->playback;
+        } else {
+                self = CAPTURE_ENABLED;
+                siu_stream = &port_info->capture;
+        }
+
+        /* Set up the siu if not already done */
+        if (!port_info->play_cap) {
+                siu_stream->rw_flg = 0; /* stream-data transfer flag */
+
+                siu_dai_spbAselect(port_info);
+                siu_dai_spbBselect(port_info);
+
+                siu_dai_open(siu_stream);
+
+                siu_dai_pcmdatapack(siu_stream);
+
+                ret = siu_dai_spbstart(port_info);
+                if (ret < 0)
+                        goto fail;
+        }
+
+        port_info->play_cap |= self;
+
+fail:
+        return ret;
+}
+
+/*
+ * SIU can set bus format to I2S / PCM / SPDIF independently for playback and
+ * capture, however, the current API sets the bus format globally for a DAI.
+ */
+static int siu_dai_set_fmt(struct snd_soc_dai *dai,
+                           unsigned int fmt)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        u32 __iomem *base = info->reg;
+        u32 ifctl;
+
+        dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n",
+                __func__, fmt, info->port_id);
+
+        if (info->port_id < 0)
+                return -ENODEV;
+
+        /* Here select between I2S / PCM / SPDIF */
+        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+        case SND_SOC_DAIFMT_I2S:
+                ifctl = siu_flags[info->port_id].playback.i2s |
+                        siu_flags[info->port_id].capture.i2s;
+                break;
+        case SND_SOC_DAIFMT_LEFT_J:
+                ifctl = siu_flags[info->port_id].playback.pcm |
+                        siu_flags[info->port_id].capture.pcm;
+                break;
+        /* SPDIF disabled - see comment at the top */
+        default:
+                return -EINVAL;
+        }
+
+        ifctl |= ~(siu_flags[info->port_id].playback.mask |
+                   siu_flags[info->port_id].capture.mask) &
+                siu_read32(base + SIU_IFCTL);
+        siu_write32(base + SIU_IFCTL, ifctl);
+
+        return 0;
+}
+
+static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+                              unsigned int freq, int dir)
+{
+        struct clk *siu_clk, *parent_clk;
+        char *siu_name, *parent_name;
+        int ret;
+
+        if (dir != SND_SOC_CLOCK_IN)
+                return -EINVAL;
+
+        dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id);
+
+        switch (clk_id) {
+        case SIU_CLKA_PLL:
+                siu_name = "siua_clk";
+                parent_name = "pll_clk";
+                break;
+        case SIU_CLKA_EXT:
+                siu_name = "siua_clk";
+                parent_name = "siumcka_clk";
+                break;
+        case SIU_CLKB_PLL:
+                siu_name = "siub_clk";
+                parent_name = "pll_clk";
+                break;
+        case SIU_CLKB_EXT:
+                siu_name = "siub_clk";
+                parent_name = "siumckb_clk";
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        siu_clk = clk_get(siu_i2s_dai.dev, siu_name);
+        if (IS_ERR(siu_clk))
+                return PTR_ERR(siu_clk);
+
+        parent_clk = clk_get(siu_i2s_dai.dev, parent_name);
+        if (!IS_ERR(parent_clk)) {
+                ret = clk_set_parent(siu_clk, parent_clk);
+                if (!ret)
+                        clk_set_rate(siu_clk, freq);
+                clk_put(parent_clk);
+        }
+
+        clk_put(siu_clk);
+
+        return 0;
+}
+
+static struct snd_soc_dai_ops siu_dai_ops = {
+        .startup        = siu_dai_startup,
+        .shutdown       = siu_dai_shutdown,
+        .prepare        = siu_dai_prepare,
+        .set_sysclk     = siu_dai_set_sysclk,
+        .set_fmt        = siu_dai_set_fmt,
+};
+
+struct snd_soc_dai siu_i2s_dai = {
+        .name = "sh-siu",
+        .id = 0,
+        .playback = {
+                .channels_min = 2,
+                .channels_max = 2,
+                .formats = SNDRV_PCM_FMTBIT_S16,
+                .rates = SNDRV_PCM_RATE_8000_48000,
+        },
+        .capture = {
+                .channels_min = 2,
+                .channels_max = 2,
+                .formats = SNDRV_PCM_FMTBIT_S16,
+                .rates = SNDRV_PCM_RATE_8000_48000,
+         },
+        .ops = &siu_dai_ops,
+};
+EXPORT_SYMBOL_GPL(siu_i2s_dai);
+
+static int __devinit siu_probe(struct platform_device *pdev)
+{
+        const struct firmware *fw_entry;
+        struct resource *res, *region;
+        struct siu_info *info;
+        int ret;
+
+        info = kmalloc(sizeof(*info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+
+        ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev);
+        if (ret)
+                goto ereqfw;
+
+        /*
+         * Loaded firmware is "const" - read only, but we have to modify it in
+         * snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect()
+         */
+        memcpy(&info->fw, fw_entry->data, fw_entry->size);
+
+        release_firmware(fw_entry);
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                ret = -ENODEV;
+                goto egetres;
+        }
+
+        region = request_mem_region(res->start, resource_size(res),
+                                    pdev->name);
+        if (!region) {
+                dev_err(&pdev->dev, "SIU region already claimed\n");
+                ret = -EBUSY;
+                goto ereqmemreg;
+        }
+
+        ret = -ENOMEM;
+        info->pram = ioremap(res->start, PRAM_SIZE);
+        if (!info->pram)
+                goto emappram;
+        info->xram = ioremap(res->start + XRAM_OFFSET, XRAM_SIZE);
+        if (!info->xram)
+                goto emapxram;
+        info->yram = ioremap(res->start + YRAM_OFFSET, YRAM_SIZE);
+        if (!info->yram)
+                goto emapyram;
+        info->reg = ioremap(res->start + REG_OFFSET, resource_size(res) -
+                            REG_OFFSET);
+        if (!info->reg)
+                goto emapreg;
+
+        siu_i2s_dai.dev = &pdev->dev;
+        siu_i2s_dai.private_data = info;
+
+        ret = snd_soc_register_dais(&siu_i2s_dai, 1);
+        if (ret < 0)
+                goto edaiinit;
+
+        ret = snd_soc_register_platform(&siu_platform);
+        if (ret < 0)
+                goto esocregp;
+
+        pm_runtime_enable(&pdev->dev);
+
+        return ret;
+
+esocregp:
+        snd_soc_unregister_dais(&siu_i2s_dai, 1);
+edaiinit:
+        iounmap(info->reg);
+emapreg:
+        iounmap(info->yram);
+emapyram:
+        iounmap(info->xram);
+emapxram:
+        iounmap(info->pram);
+emappram:
+        release_mem_region(res->start, resource_size(res));
+ereqmemreg:
+egetres:
+ereqfw:
+        kfree(info);
+
+        return ret;
+}
+
+static int __devexit siu_remove(struct platform_device *pdev)
+{
+        struct siu_info *info = siu_i2s_dai.private_data;
+        struct resource *res;
+
+        pm_runtime_disable(&pdev->dev);
+
+        snd_soc_unregister_platform(&siu_platform);
+        snd_soc_unregister_dais(&siu_i2s_dai, 1);
+
+        iounmap(info->reg);
+        iounmap(info->yram);
+        iounmap(info->xram);
+        iounmap(info->pram);
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (res)
+                release_mem_region(res->start, resource_size(res));
+        kfree(info);
+
+        return 0;
+}
+
+static struct platform_driver siu_driver = {
+        .driver         = {
+                .name   = "sh_siu",
+        },
+        .probe          = siu_probe,
+        .remove         = __devexit_p(siu_remove),
+};
+
+static int __init siu_init(void)
+{
+        return platform_driver_register(&siu_driver);
+}
+
+static void __exit siu_exit(void)
+{
+        platform_driver_unregister(&siu_driver);
+}
+
+module_init(siu_init)
+module_exit(siu_exit)
+
+MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
+MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
+MODULE_LICENSE("GPL");