text: /*
   * 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 <linux/slab.h>
  #include <linux/module.h>
  
  #include <asm/clock.h>
  #include <asm/siu.h>
  
  #include <sound/control.h>
  #include <sound/soc.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;
  };
  
  struct siu_info *siu_i2s_data;
  
  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_data;
  	u32 __iomem *base = info->reg;
  
  	dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
  
  	/* 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(struct siu_port *port_info)
  {
  	struct siu_info *info = siu_i2s_data;
  	u32 __iomem *base = info->reg;
  
  	/* SIU software reset */
  	siu_write32(base + SIU_SRCTL, 0);
  }
  
  static void siu_dai_spbAselect(struct siu_port *port_info)
  {
  	struct siu_info *info = siu_i2s_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_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_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_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_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_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_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 = snd_soc_dai_get_drvdata(dai);
  	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 = snd_soc_dai_get_drvdata(dai);
  	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 ? */
  		if (WARN_ON(port_info->playback.rw_flg || port_info->capture.rw_flg))
  			return;
  		siu_dai_spbstop(port_info);
  		siu_dai_stop(port_info);
  	}
  }
  
  /* 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 = snd_soc_dai_get_drvdata(dai);
  	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;
  	} else {
  		ret = 0;
  	}
  
  	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 = snd_soc_dai_get_drvdata(dai);
  	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(dai->dev, siu_name);
  	if (IS_ERR(siu_clk)) {
  		dev_err(dai->dev, "%s: cannot get a SIU clock: %ld\n", __func__,
  			PTR_ERR(siu_clk));
  		return PTR_ERR(siu_clk);
  	}
  
  	parent_clk = clk_get(dai->dev, parent_name);
  	if (IS_ERR(parent_clk)) {
  		ret = PTR_ERR(parent_clk);
  		dev_err(dai->dev, "cannot get a SIU clock parent: %d\n", ret);
  		goto epclkget;
  	}
  
  	ret = clk_set_parent(siu_clk, parent_clk);
  	if (ret < 0) {
  		dev_err(dai->dev, "cannot reparent the SIU clock: %d\n", ret);
  		goto eclksetp;
  	}
  
  	ret = clk_set_rate(siu_clk, freq);
  	if (ret < 0)
  		dev_err(dai->dev, "cannot set SIU clock rate: %d\n", ret);
  
  	/* TODO: when clkdev gets reference counting we'll move these to siu_dai_shutdown() */
  eclksetp:
  	clk_put(parent_clk);
  epclkget:
  	clk_put(siu_clk);
  
  	return ret;
  }
  
  static const 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,
  };
  
  static struct snd_soc_dai_driver siu_i2s_dai = {
  	.name	= "siu-i2s-dai",
  	.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,
  };
  
  static const struct snd_soc_component_driver siu_i2s_component = {
  	.name		= "siu-i2s",
  };
  
  static int 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;
  	siu_i2s_data = info;
  	info->dev = &pdev->dev;
  
  	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;
  
  	dev_set_drvdata(&pdev->dev, info);
  
  	/* register using ARRAY version so we can keep dai name */
  	ret = snd_soc_register_component(&pdev->dev, &siu_i2s_component,
  					 &siu_i2s_dai, 1);
  	if (ret < 0)
  		goto edaiinit;
  
  	ret = snd_soc_register_platform(&pdev->dev, &siu_platform);
  	if (ret < 0)
  		goto esocregp;
  
  	pm_runtime_enable(&pdev->dev);
  
  	return ret;
  
  esocregp:
  	snd_soc_unregister_component(&pdev->dev);
  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 siu_remove(struct platform_device *pdev)
  {
  	struct siu_info *info = dev_get_drvdata(&pdev->dev);
  	struct resource *res;
  
  	pm_runtime_disable(&pdev->dev);
  
  	snd_soc_unregister_platform(&pdev->dev);
  	snd_soc_unregister_component(&pdev->dev);
  
  	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	= "siu-pcm-audio",
  	},
  	.probe		= siu_probe,
  	.remove		= siu_remove,
  };
  
  module_platform_driver(siu_driver);
  
  MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
  MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
  MODULE_LICENSE("GPL");
  