diff mbox series

[v3,2/2] soundwire: qcom: add support for SoundWire controller

Message ID 20191011154423.2506-3-srinivas.kandagatla@linaro.org (mailing list archive)
State New, archived
Headers show
Series soundwire: Add support to Qualcomm SoundWire master | expand

Commit Message

Srinivas Kandagatla Oct. 11, 2019, 3:44 p.m. UTC
Qualcomm SoundWire Master controller is present in most Qualcomm SoCs
either integrated as part of WCD audio codecs via slimbus or
as part of SOC I/O.

This patchset adds support to a very basic controller which has been
tested with WCD934x SoundWire controller connected to WSA881x smart
speaker amplifiers.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 drivers/soundwire/Kconfig  |   9 +
 drivers/soundwire/Makefile |   4 +
 drivers/soundwire/qcom.c   | 935 +++++++++++++++++++++++++++++++++++++
 3 files changed, 948 insertions(+)
 create mode 100644 drivers/soundwire/qcom.c

Comments

Pierre-Louis Bossart Oct. 11, 2019, 5:50 p.m. UTC | #1
> +static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 cmd_data,
> +				     u8 dev_addr, u16 reg_addr)
> +{
> +	DECLARE_COMPLETION_ONSTACK(comp);
> +	unsigned long flags;
> +	u32 val;
> +	int ret;
> +
> +	spin_lock_irqsave(&ctrl->comp_lock, flags);
> +	ctrl->comp = &comp;
> +	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
> +	val = SWRM_REG_VAL_PACK(cmd_data, dev_addr,
> +				SWRM_SPECIAL_CMD_ID, reg_addr);
> +	ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_WR_CMD, val);
> +	if (ret)
> +		goto err;
> +
> +	ret = wait_for_completion_timeout(ctrl->comp,
> +					  msecs_to_jiffies(TIMEOUT_MS));
> +
> +	if (!ret)
> +		ret = SDW_CMD_IGNORED;
> +	else
> +		ret = SDW_CMD_OK;

It's odd to report CMD_IGNORED on a timeout. CMD_IGNORED is a valid 
answer that should be retrieved immediately. You probably need to 
translate the soundwire errors into -ETIMEOUT or something.

> +err:
> +	spin_lock_irqsave(&ctrl->comp_lock, flags);
> +	ctrl->comp = NULL;
> +	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
> +
> +	return ret;
> +}
> +
> +static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *ctrl,
> +				     u8 dev_addr, u16 reg_addr,
> +				     u32 len, u8 *rval)
> +{
> +	int i, ret;
> +	u32 val;
> +	DECLARE_COMPLETION_ONSTACK(comp);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&ctrl->comp_lock, flags);
> +	ctrl->comp = &comp;
> +	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
> +
> +	val = SWRM_REG_VAL_PACK(len, dev_addr, SWRM_SPECIAL_CMD_ID, reg_addr);
> +	ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_RD_CMD, val);
> +	if (ret)
> +		goto err;
> +
> +	ret = wait_for_completion_timeout(ctrl->comp,
> +					  msecs_to_jiffies(TIMEOUT_MS));
> +
> +	if (!ret) {
> +		ret = SDW_CMD_IGNORED;
> +		goto err;
> +	} else {
> +		ret = SDW_CMD_OK;
> +	}

same comment on reporting SDW_CMD_IGNORED on timeout, this is very odd.

> +
> +	for (i = 0; i < len; i++) {
> +		ret = ctrl->reg_read(ctrl, SWRM_CMD_FIFO_RD_FIFO_ADDR, &val);
> +		if (ret)
> +			return ret;
> +
> +		rval[i] = val & 0xFF;
> +	}
> +
> +err:
> +	spin_lock_irqsave(&ctrl->comp_lock, flags);
> +	ctrl->comp = NULL;
> +	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
> +
> +	return ret;
> +} > +

[snip]

> +static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
> +{
> +	struct qcom_swrm_ctrl *ctrl = dev_id;
> +	u32 sts, value;
> +	unsigned long flags;
> +
> +	ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
> +
> +	if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
> +		ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
> +		dev_err_ratelimited(ctrl->dev,
> +				    "CMD error, fifo status 0x%x\n",
> +				     value);
> +		ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
> +	}
> +
> +	if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
> +	    sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
> +		schedule_work(&ctrl->slave_work);
> +
> +	ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR, sts);
> +
> +	if (sts & SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED) {
> +		spin_lock_irqsave(&ctrl->comp_lock, flags);
> +		if (ctrl->comp)
> +			complete(ctrl->comp);
> +		spin_unlock_irqrestore(&ctrl->comp_lock, flags);


Wouldn't it be simpler if you declared the completion structure as part 
of your controller definitions, as done for the Intel stuff?

[snip]

> +static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl,
> +					struct sdw_stream_runtime *stream)
> +{
> +	struct sdw_master_runtime *m_rt;
> +	struct sdw_port_runtime *p_rt;
> +	unsigned long *port_mask;
> +
> +	mutex_lock(&ctrl->port_lock);

is this lock to avoid races between alloc/free? if yes maybe document it?

> +
> +	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
> +		if (m_rt->direction == SDW_DATA_DIR_RX)
> +			port_mask = &ctrl->dout_port_mask;
> +		else
> +			port_mask = &ctrl->din_port_mask;
> +
> +		list_for_each_entry(p_rt, &m_rt->port_list, port_node)
> +			clear_bit(p_rt->num - 1, port_mask);
> +	}
> +
> +	mutex_unlock(&ctrl->port_lock);
> +}
> +
> +static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
> +					struct sdw_stream_runtime *stream,
> +				       struct snd_pcm_hw_params *params,
> +				       int direction)
> +{
> +	struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS];
> +	struct sdw_stream_config sconfig;
> +	struct sdw_master_runtime *m_rt;
> +	struct sdw_slave_runtime *s_rt;
> +	struct sdw_port_runtime *p_rt;
> +	unsigned long *port_mask;
> +	int i, maxport, pn, nports = 0, ret = 0;
> +
> +	mutex_lock(&ctrl->port_lock);
> +	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
> +		if (m_rt->direction == SDW_DATA_DIR_RX) {
> +			maxport = ctrl->num_dout_ports;
> +			port_mask = &ctrl->dout_port_mask;
> +		} else {
> +			maxport = ctrl->num_din_ports;
> +			port_mask = &ctrl->din_port_mask;
> +		}
> +
> +		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
> +			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
> +				/* Port numbers start from 1 - 14*/
> +				pn = find_first_zero_bit(port_mask, maxport);
> +				if (pn > (maxport - 1)) {
> +					dev_err(ctrl->dev, "All ports busy\n");
> +					ret = -EBUSY;
> +					goto err;
> +				}
> +				set_bit(pn, port_mask);
> +				pconfig[nports].num = pn + 1;
> +				pconfig[nports].ch_mask = p_rt->ch_mask;
> +				nports++;
> +			}
> +		}
> +	}
> +
> +	if (direction == SNDRV_PCM_STREAM_CAPTURE)
> +		sconfig.direction = SDW_DATA_DIR_TX;
> +	else
> +		sconfig.direction = SDW_DATA_DIR_RX;
> +
> +	sconfig.ch_count = 1;
> +	sconfig.frame_rate = params_rate(params);
> +	sconfig.type = stream->type;
> +	sconfig.bps = 1;

Should probably add a note that hw_params is ignored since it's PDM 
content, so only 1ch 1bit data.

> +	sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig,
> +			      nports, stream);
> +err:
> +	if (ret) {
> +		for (i = 0; i < nports; i++)
> +			clear_bit(pconfig[i].num - 1, port_mask);
> +	}
> +
> +	mutex_unlock(&ctrl->port_lock);
> +
> +	return ret;
> +}
> +

[snip]

> +static int qcom_swrm_hw_free(struct snd_pcm_substream *substream,
> +			     struct snd_soc_dai *dai)
> +{
> +	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
> +	struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
> +
> +	qcom_swrm_stream_free_ports(ctrl, sruntime);
> +	sdw_stream_remove_master(&ctrl->bus, sruntime);
> +	sdw_deprepare_stream(sruntime);
> +	sdw_disable_stream(sruntime);

Should is be the reverse order? Removing ports/master before disabling 
doesn't seem too good.

> +
> +	return 0;
> +}
> +

> +static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl)
> +{
> +	int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports;
> +	struct snd_soc_dai_driver *dais;
> +	struct snd_soc_pcm_stream *stream;
> +	struct device *dev = ctrl->dev;
> +	int i;
> +
> +	/* PDM dais are only tested for now */
> +	dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
> +	if (!dais)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < num_dais; i++) {
> +		dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i);
> +		if (!dais[i].name)
> +			return -ENOMEM;
> +
> +		if (i < ctrl->num_dout_ports) {
> +			stream = &dais[i].playback;
> +			stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
> +							     "SDW Tx%d", i);
> +		} else {
> +			stream = &dais[i].capture;
> +			stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
> +							     "SDW Rx%d", i);
> +		}

For the Intel stuff, we removed the stream_name assignment since it 
conflicted with the DAI widgets added by the topology. Since the code 
looks inspired by the Intel DAI handling, you should look into this.
Srinivas Kandagatla Oct. 14, 2019, 9:04 a.m. UTC | #2
Thanks Pierre for taking time to review the patch.

On 11/10/2019 18:50, Pierre-Louis Bossart wrote:
> 
>> +static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 
>> cmd_data,
>> +                     u8 dev_addr, u16 reg_addr)
>> +{
>> +    DECLARE_COMPLETION_ONSTACK(comp);
>> +    unsigned long flags;
>> +    u32 val;
>> +    int ret;
>> +
>> +    spin_lock_irqsave(&ctrl->comp_lock, flags);
>> +    ctrl->comp = &comp;
>> +    spin_unlock_irqrestore(&ctrl->comp_lock, flags);
>> +    val = SWRM_REG_VAL_PACK(cmd_data, dev_addr,
>> +                SWRM_SPECIAL_CMD_ID, reg_addr);
>> +    ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_WR_CMD, val);
>> +    if (ret)
>> +        goto err;
>> +
>> +    ret = wait_for_completion_timeout(ctrl->comp,
>> +                      msecs_to_jiffies(TIMEOUT_MS));
>> +
>> +    if (!ret)
>> +        ret = SDW_CMD_IGNORED;
>> +    else
>> +        ret = SDW_CMD_OK;
> 
> It's odd to report CMD_IGNORED on a timeout. CMD_IGNORED is a valid 
> answer that should be retrieved immediately. You probably need to 
> translate the soundwire errors into -ETIMEOUT or something.

In this controller we have no way to know if the command is ignored or 
timedout, so All the commands that did not receive response either due 
to ignore or timeout are currently detected with out any response 
interrupt in given timeout.

> 
>> +err:
>> +    spin_lock_irqsave(&ctrl->comp_lock, flags);
>> +    ctrl->comp = NULL;
>> +    spin_unlock_irqrestore(&ctrl->comp_lock, flags);
>> +
>> +    return ret;
>> +}
>> +
>> +
>> +    for (i = 0; i < len; i++) {
>> +        ret = ctrl->reg_read(ctrl, SWRM_CMD_FIFO_RD_FIFO_ADDR, &val);
>> +        if (ret)
>> +            return ret;
>> +
>> +        rval[i] = val & 0xFF;
>> +    }
>> +
>> +err:
>> +    spin_lock_irqsave(&ctrl->comp_lock, flags);
>> +    ctrl->comp = NULL;
>> +    spin_unlock_irqrestore(&ctrl->comp_lock, flags);
>> +
>> +    return ret;
>> +} > +
> 
> [snip]
> 
>> +static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
>> +{
>> +    struct qcom_swrm_ctrl *ctrl = dev_id;
>> +    u32 sts, value;
>> +    unsigned long flags;
>> +
>> +    ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
>> +
>> +    if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
>> +        ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
>> +        dev_err_ratelimited(ctrl->dev,
>> +                    "CMD error, fifo status 0x%x\n",
>> +                     value);
>> +        ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
>> +    }
>> +
>> +    if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
>> +        sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
>> +        schedule_work(&ctrl->slave_work);
>> +
>> +    ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR, sts);
>> +
>> +    if (sts & SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED) {
>> +        spin_lock_irqsave(&ctrl->comp_lock, flags);
>> +        if (ctrl->comp)
>> +            complete(ctrl->comp);
>> +        spin_unlock_irqrestore(&ctrl->comp_lock, flags);
> 
> 
> Wouldn't it be simpler if you declared the completion structure as part 
> of your controller definitions, as done for the Intel stuff?
> 
I can give that a go!
> [snip]
> 
>> +static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl,
>> +                    struct sdw_stream_runtime *stream)
>> +{
>> +    struct sdw_master_runtime *m_rt;
>> +    struct sdw_port_runtime *p_rt;
>> +    unsigned long *port_mask;
>> +
>> +    mutex_lock(&ctrl->port_lock);
> 
> is this lock to avoid races between alloc/free? if yes maybe document it?
> 

Yes, port allocation resource is protected across these calls here, I 
can add some notes as you suggested in next version.

>> +
>> +    list_for_each_entry(m_rt, &stream->master_list, stream_node) {
>> +        if (m_rt->direction == SDW_DATA_DIR_RX)
>> +            port_mask = &ctrl->dout_port_mask;
>> +        else
>> +            port_mask = &ctrl->din_port_mask;
>> +
>> +        list_for_each_entry(p_rt, &m_rt->port_list, port_node)
>> +            clear_bit(p_rt->num - 1, port_mask);
>> +    }
>> +
>> +    mutex_unlock(&ctrl->port_lock);
>> +}
>> +
>> +static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
>> +                    struct sdw_stream_runtime *stream,
>> +                       struct snd_pcm_hw_params *params,
>> +                       int direction)
>> +{
>> +    struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS];
>> +    struct sdw_stream_config sconfig;
>> +    struct sdw_master_runtime *m_rt;
>> +    struct sdw_slave_runtime *s_rt;
>> +    struct sdw_port_runtime *p_rt;
>> +    unsigned long *port_mask;
>> +    int i, maxport, pn, nports = 0, ret = 0;
>> +
>> +    mutex_lock(&ctrl->port_lock);
>> +    list_for_each_entry(m_rt, &stream->master_list, stream_node) {
>> +        if (m_rt->direction == SDW_DATA_DIR_RX) {
>> +            maxport = ctrl->num_dout_ports;
>> +            port_mask = &ctrl->dout_port_mask;
>> +        } else {
>> +            maxport = ctrl->num_din_ports;
>> +            port_mask = &ctrl->din_port_mask;
>> +        }
>> +
>> +        list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
>> +            list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
>> +                /* Port numbers start from 1 - 14*/
>> +                pn = find_first_zero_bit(port_mask, maxport);
>> +                if (pn > (maxport - 1)) {
>> +                    dev_err(ctrl->dev, "All ports busy\n");
>> +                    ret = -EBUSY;
>> +                    goto err;
>> +                }
>> +                set_bit(pn, port_mask);
>> +                pconfig[nports].num = pn + 1;
>> +                pconfig[nports].ch_mask = p_rt->ch_mask;
>> +                nports++;
>> +            }
>> +        }
>> +    }
>> +
>> +    if (direction == SNDRV_PCM_STREAM_CAPTURE)
>> +        sconfig.direction = SDW_DATA_DIR_TX;
>> +    else
>> +        sconfig.direction = SDW_DATA_DIR_RX;
>> +
>> +    sconfig.ch_count = 1;
>> +    sconfig.frame_rate = params_rate(params);
>> +    sconfig.type = stream->type;
>> +    sconfig.bps = 1;
> 
> Should probably add a note that hw_params is ignored since it's PDM 
> content, so only 1ch 1bit data.
> 

Okay Sure!
>> +    sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig,
>> +                  nports, stream);
>> +err:
>> +    if (ret) {
>> +        for (i = 0; i < nports; i++)
>> +            clear_bit(pconfig[i].num - 1, port_mask);
>> +    }
>> +
>> +    mutex_unlock(&ctrl->port_lock);
>> +
>> +    return ret;
>> +}
>> +
> 
> [snip]
> 
>> +static int qcom_swrm_hw_free(struct snd_pcm_substream *substream,
>> +                 struct snd_soc_dai *dai)
>> +{
>> +    struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
>> +    struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
>> +
>> +    qcom_swrm_stream_free_ports(ctrl, sruntime);
>> +    sdw_stream_remove_master(&ctrl->bus, sruntime);
>> +    sdw_deprepare_stream(sruntime);
>> +    sdw_disable_stream(sruntime);
> 
> Should is be the reverse order? Removing ports/master before disabling 
> doesn't seem too good.

Good point!  Will fix it in next version.

> 
>> +
>> +    return 0;
>> +}
>> +
> 
>> +static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl)
>> +{
>> +    int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports;
>> +    struct snd_soc_dai_driver *dais;
>> +    struct snd_soc_pcm_stream *stream;
>> +    struct device *dev = ctrl->dev;
>> +    int i;
>> +
>> +    /* PDM dais are only tested for now */
>> +    dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
>> +    if (!dais)
>> +        return -ENOMEM;
>> +
>> +    for (i = 0; i < num_dais; i++) {
>> +        dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i);
>> +        if (!dais[i].name)
>> +            return -ENOMEM;
>> +
>> +        if (i < ctrl->num_dout_ports) {
>> +            stream = &dais[i].playback;
>> +            stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
>> +                                 "SDW Tx%d", i);
>> +        } else {
>> +            stream = &dais[i].capture;
>> +            stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
>> +                                 "SDW Rx%d", i);
>> +        }
> 
> For the Intel stuff, we removed the stream_name assignment since it 
> conflicted with the DAI widgets added by the topology. Since the code 
> looks inspired by the Intel DAI handling, you should look into this.

Yes, this code was inspired by Intel's DAI handling, I will take a look 
a look at latest code and update accordingly.

Thanks,
srini
>
Pierre-Louis Bossart Oct. 14, 2019, 3:43 p.m. UTC | #3
On 10/14/19 4:04 AM, Srinivas Kandagatla wrote:
> Thanks Pierre for taking time to review the patch.
> 
> On 11/10/2019 18:50, Pierre-Louis Bossart wrote:
>>
>>> +static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 
>>> cmd_data,
>>> +                     u8 dev_addr, u16 reg_addr)
>>> +{
>>> +    DECLARE_COMPLETION_ONSTACK(comp);
>>> +    unsigned long flags;
>>> +    u32 val;
>>> +    int ret;
>>> +
>>> +    spin_lock_irqsave(&ctrl->comp_lock, flags);
>>> +    ctrl->comp = &comp;
>>> +    spin_unlock_irqrestore(&ctrl->comp_lock, flags);
>>> +    val = SWRM_REG_VAL_PACK(cmd_data, dev_addr,
>>> +                SWRM_SPECIAL_CMD_ID, reg_addr);
>>> +    ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_WR_CMD, val);
>>> +    if (ret)
>>> +        goto err;
>>> +
>>> +    ret = wait_for_completion_timeout(ctrl->comp,
>>> +                      msecs_to_jiffies(TIMEOUT_MS));
>>> +
>>> +    if (!ret)
>>> +        ret = SDW_CMD_IGNORED;
>>> +    else
>>> +        ret = SDW_CMD_OK;
>>
>> It's odd to report CMD_IGNORED on a timeout. CMD_IGNORED is a valid 
>> answer that should be retrieved immediately. You probably need to 
>> translate the soundwire errors into -ETIMEOUT or something.
> 
> In this controller we have no way to know if the command is ignored or 
> timedout, so All the commands that did not receive response either due 
> to ignore or timeout are currently detected with out any response 
> interrupt in given timeout.

ok. It's still very odd. a CMD_IGNORED is a required answer e.g. when 
there is no device0 left to enumerate, when a device has fallen off the 
bus or when accessing a non-implemented register.

>>> +static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl)
>>> +{
>>> +    int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports;
>>> +    struct snd_soc_dai_driver *dais;
>>> +    struct snd_soc_pcm_stream *stream;
>>> +    struct device *dev = ctrl->dev;
>>> +    int i;
>>> +
>>> +    /* PDM dais are only tested for now */
>>> +    dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
>>> +    if (!dais)
>>> +        return -ENOMEM;
>>> +
>>> +    for (i = 0; i < num_dais; i++) {
>>> +        dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i);
>>> +        if (!dais[i].name)
>>> +            return -ENOMEM;
>>> +
>>> +        if (i < ctrl->num_dout_ports) {
>>> +            stream = &dais[i].playback;
>>> +            stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
>>> +                                 "SDW Tx%d", i);
>>> +        } else {
>>> +            stream = &dais[i].capture;
>>> +            stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
>>> +                                 "SDW Rx%d", i);
>>> +        }
>>
>> For the Intel stuff, we removed the stream_name assignment since it 
>> conflicted with the DAI widgets added by the topology. Since the code 
>> looks inspired by the Intel DAI handling, you should look into this.
> 
> Yes, this code was inspired by Intel's DAI handling, I will take a look 
> a look at latest code and update accordingly.


FWIW, the stream handling seems to have issues as well, specifically the 
'deprepare' part, we are currently working around errors with 
suspend-resume, see e.g. experimental branch at 
https://github.com/thesofproject/linux/pull/1314
Vinod Koul Oct. 21, 2019, 4:44 a.m. UTC | #4
On 11-10-19, 16:44, Srinivas Kandagatla wrote:

> +static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
> +{
> +	struct qcom_swrm_ctrl *ctrl = dev_id;
> +	u32 sts, value;
> +	unsigned long flags;
> +
> +	ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
> +
> +	if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
> +		ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
> +		dev_err_ratelimited(ctrl->dev,
> +				    "CMD error, fifo status 0x%x\n",
> +				     value);
> +		ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
> +	}
> +
> +	if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
> +	    sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
> +		schedule_work(&ctrl->slave_work);

we are in irq thread, so why not do the work here rather than schedule
it?

> +static int qcom_swrm_compute_params(struct sdw_bus *bus)
> +{
> +	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
> +	struct sdw_master_runtime *m_rt;
> +	struct sdw_slave_runtime *s_rt;
> +	struct sdw_port_runtime *p_rt;
> +	struct qcom_swrm_port_config *pcfg;
> +	int i = 0;
> +
> +	list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
> +		list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
> +			pcfg = &ctrl->pconfig[p_rt->num - 1];
> +			p_rt->transport_params.port_num = p_rt->num;
> +			p_rt->transport_params.sample_interval = pcfg->si + 1;
> +			p_rt->transport_params.offset1 = pcfg->off1;
> +			p_rt->transport_params.offset2 = pcfg->off2;
> +		}
> +
> +		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
> +			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
> +				pcfg = &ctrl->pconfig[i];
> +				p_rt->transport_params.port_num = p_rt->num;
> +				p_rt->transport_params.sample_interval =
> +					pcfg->si + 1;
> +				p_rt->transport_params.offset1 = pcfg->off1;
> +				p_rt->transport_params.offset2 = pcfg->off2;
> +				i++;
> +			}

Can you explain this one, am not sure I understood this. This fn is
supposed to compute and fill up the params, all I can see is filling up!

> +static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
> +	.hw_params = qcom_swrm_hw_params,
> +	.prepare = qcom_swrm_prepare,
> +	.hw_free = qcom_swrm_hw_free,
> +	.startup = qcom_swrm_startup,
> +	.shutdown = qcom_swrm_shutdown,
> +        .set_sdw_stream = qcom_swrm_set_sdw_stream,

why does indent look off to me!
Srinivas Kandagatla Oct. 30, 2019, 2:56 p.m. UTC | #5
On 21/10/2019 05:44, Vinod Koul wrote:
> On 11-10-19, 16:44, Srinivas Kandagatla wrote:
> 
>> +static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
>> +{
>> +	struct qcom_swrm_ctrl *ctrl = dev_id;
>> +	u32 sts, value;
>> +	unsigned long flags;
>> +
>> +	ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
>> +
>> +	if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
>> +		ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
>> +		dev_err_ratelimited(ctrl->dev,
>> +				    "CMD error, fifo status 0x%x\n",
>> +				     value);
>> +		ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
>> +	}
>> +
>> +	if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
>> +	    sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
>> +		schedule_work(&ctrl->slave_work);
> 
> we are in irq thread, so why not do the work here rather than schedule
> it?

The reason is that, sdw_handle_slave_status() we will read device id 
registers, which are fifo based in this controller and triggers an 
interrupt for each read.
So all the such reads will timeout waiting for interrupt if we do not do 
it in a separate thread.



> 
>> +static int qcom_swrm_compute_params(struct sdw_bus *bus)
>> +{
>> +	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
>> +	struct sdw_master_runtime *m_rt;
>> +	struct sdw_slave_runtime *s_rt;
>> +	struct sdw_port_runtime *p_rt;
>> +	struct qcom_swrm_port_config *pcfg;
>> +	int i = 0;
>> +
>> +	list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
>> +		list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
>> +			pcfg = &ctrl->pconfig[p_rt->num - 1];
>> +			p_rt->transport_params.port_num = p_rt->num;
>> +			p_rt->transport_params.sample_interval = pcfg->si + 1;
>> +			p_rt->transport_params.offset1 = pcfg->off1;
>> +			p_rt->transport_params.offset2 = pcfg->off2;
>> +		}
>> +
>> +		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
>> +			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
>> +				pcfg = &ctrl->pconfig[i];
>> +				p_rt->transport_params.port_num = p_rt->num;
>> +				p_rt->transport_params.sample_interval =
>> +					pcfg->si + 1;
>> +				p_rt->transport_params.offset1 = pcfg->off1;
>> +				p_rt->transport_params.offset2 = pcfg->off2;
>> +				i++;
>> +			}
> 
> Can you explain this one, am not sure I understood this. This fn is
> supposed to compute and fill up the params, all I can see is filling up!
> 
Bandwidth parameters are currently coming from board specific Device 
Tree, which are programmed here.

>> +static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
>> +	.hw_params = qcom_swrm_hw_params,
>> +	.prepare = qcom_swrm_prepare,
>> +	.hw_free = qcom_swrm_hw_free,
>> +	.startup = qcom_swrm_startup,
>> +	.shutdown = qcom_swrm_shutdown,
>> +        .set_sdw_stream = qcom_swrm_set_sdw_stream,
> 
> why does indent look off to me!
> 
Yep, Fixed in next version.

--srini
Pierre-Louis Bossart Oct. 30, 2019, 3:18 p.m. UTC | #6
On 10/30/19 9:56 AM, Srinivas Kandagatla wrote:
> 
> 
> On 21/10/2019 05:44, Vinod Koul wrote:
>> On 11-10-19, 16:44, Srinivas Kandagatla wrote:
>>
>>> +static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
>>> +{
>>> +    struct qcom_swrm_ctrl *ctrl = dev_id;
>>> +    u32 sts, value;
>>> +    unsigned long flags;
>>> +
>>> +    ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
>>> +
>>> +    if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
>>> +        ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
>>> +        dev_err_ratelimited(ctrl->dev,
>>> +                    "CMD error, fifo status 0x%x\n",
>>> +                     value);
>>> +        ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
>>> +    }
>>> +
>>> +    if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
>>> +        sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
>>> +        schedule_work(&ctrl->slave_work);
>>
>> we are in irq thread, so why not do the work here rather than schedule
>> it?
> 
> The reason is that, sdw_handle_slave_status() we will read device id 
> registers, which are fifo based in this controller and triggers an 
> interrupt for each read.
> So all the such reads will timeout waiting for interrupt if we do not do 
> it in a separate thread.

Yes, it's similar for Intel. we don't read device ID in the handler or 
reads would time out. And in the latest patches we also use a work queue 
for the slave status handling (due to MSI handling issues).
Even if this timeout problem did not exists, updates to the slave status 
will typically result in additional read/writes, which are going to be 
throttled by the command bandwidth (frame rate), so this status update 
should really not be done in a handler. This has to be done in a thread 
or work queue.

> 
> 
> 
>>
>>> +static int qcom_swrm_compute_params(struct sdw_bus *bus)
>>> +{
>>> +    struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
>>> +    struct sdw_master_runtime *m_rt;
>>> +    struct sdw_slave_runtime *s_rt;
>>> +    struct sdw_port_runtime *p_rt;
>>> +    struct qcom_swrm_port_config *pcfg;
>>> +    int i = 0;
>>> +
>>> +    list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
>>> +        list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
>>> +            pcfg = &ctrl->pconfig[p_rt->num - 1];
>>> +            p_rt->transport_params.port_num = p_rt->num;
>>> +            p_rt->transport_params.sample_interval = pcfg->si + 1;
>>> +            p_rt->transport_params.offset1 = pcfg->off1;
>>> +            p_rt->transport_params.offset2 = pcfg->off2;
>>> +        }
>>> +
>>> +        list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
>>> +            list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
>>> +                pcfg = &ctrl->pconfig[i];
>>> +                p_rt->transport_params.port_num = p_rt->num;
>>> +                p_rt->transport_params.sample_interval =
>>> +                    pcfg->si + 1;
>>> +                p_rt->transport_params.offset1 = pcfg->off1;
>>> +                p_rt->transport_params.offset2 = pcfg->off2;
>>> +                i++;
>>> +            }
>>
>> Can you explain this one, am not sure I understood this. This fn is
>> supposed to compute and fill up the params, all I can see is filling up!
>>
> Bandwidth parameters are currently coming from board specific Device 
> Tree, which are programmed here.

'compute' does not mean 'dynamic on-demand bandwidth allocation', it's 
perfectly legal to use fixed tables as done here.

> 
>>> +static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
>>> +    .hw_params = qcom_swrm_hw_params,
>>> +    .prepare = qcom_swrm_prepare,
>>> +    .hw_free = qcom_swrm_hw_free,
>>> +    .startup = qcom_swrm_startup,
>>> +    .shutdown = qcom_swrm_shutdown,
>>> +        .set_sdw_stream = qcom_swrm_set_sdw_stream,
>>
>> why does indent look off to me!
>>
> Yep, Fixed in next version.
> 
> --srini
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
diff mbox series

Patch

diff --git a/drivers/soundwire/Kconfig b/drivers/soundwire/Kconfig
index f518273cfbe3..69f3b0e36b3d 100644
--- a/drivers/soundwire/Kconfig
+++ b/drivers/soundwire/Kconfig
@@ -30,4 +30,13 @@  config SOUNDWIRE_INTEL
 	  enable this config option to get the SoundWire support for that
 	  device.
 
+config SOUNDWIRE_QCOM
+	tristate "Qualcomm SoundWire Master driver"
+	depends on SLIMBUS
+	depends on SND_SOC
+	help
+	  SoundWire Qualcomm Master driver.
+	  If you have an Qualcomm platform which has a SoundWire Master then
+	  enable this config option to get the SoundWire support for that
+	  device
 endif
diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
index 563894e5ecaf..e2cdff990e9f 100644
--- a/drivers/soundwire/Makefile
+++ b/drivers/soundwire/Makefile
@@ -21,3 +21,7 @@  obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o
 
 soundwire-intel-init-objs := intel_init.o
 obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel-init.o
+
+#Qualcomm driver
+soundwire-qcom-objs :=	qcom.o
+obj-$(CONFIG_SOUNDWIRE_QCOM) += soundwire-qcom.o
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
new file mode 100644
index 000000000000..89cebc64386e
--- /dev/null
+++ b/drivers/soundwire/qcom.c
@@ -0,0 +1,935 @@ 
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019, Linaro Limited
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/slimbus.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_registers.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include "bus.h"
+
+#define SWRM_COMP_HW_VERSION					0x00
+#define SWRM_COMP_CFG_ADDR					0x04
+#define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK			BIT(1)
+#define SWRM_COMP_CFG_ENABLE_MSK				BIT(0)
+#define SWRM_COMP_PARAMS					0x100
+#define SWRM_COMP_PARAMS_DOUT_PORTS_MASK			GENMASK(4, 0)
+#define SWRM_COMP_PARAMS_DIN_PORTS_MASK				GENMASK(9, 5)
+#define SWRM_INTERRUPT_STATUS					0x200
+#define SWRM_INTERRUPT_STATUS_RMSK				GENMASK(16, 0)
+#define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED		BIT(1)
+#define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS		BIT(2)
+#define SWRM_INTERRUPT_STATUS_CMD_ERROR				BIT(7)
+#define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED		BIT(10)
+#define SWRM_INTERRUPT_MASK_ADDR				0x204
+#define SWRM_INTERRUPT_CLEAR					0x208
+#define SWRM_CMD_FIFO_WR_CMD					0x300
+#define SWRM_CMD_FIFO_RD_CMD					0x304
+#define SWRM_CMD_FIFO_CMD					0x308
+#define SWRM_CMD_FIFO_STATUS					0x30C
+#define SWRM_CMD_FIFO_CFG_ADDR					0x314
+#define SWRM_RD_WR_CMD_RETRIES					0x7
+#define SWRM_CMD_FIFO_RD_FIFO_ADDR				0x318
+#define SWRM_ENUMERATOR_CFG_ADDR				0x500
+#define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m)		(0x101C + 0x40 * (m))
+#define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT			3
+#define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK			GENMASK(2, 0)
+#define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK			GENMASK(7, 3)
+#define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT			0
+#define SWRM_MCP_CFG_ADDR					0x1048
+#define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK		GENMASK(21, 17)
+#define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_SHFT		0x11
+#define SWRM_DEF_CMD_NO_PINGS					0x1f
+#define SWRM_MCP_STATUS						0x104C
+#define SWRM_MCP_STATUS_BANK_NUM_MASK				BIT(0)
+#define SWRM_MCP_SLV_STATUS					0x1090
+#define SWRM_MCP_SLV_STATUS_MASK				GENMASK(1, 0)
+#define SWRM_DP_PORT_CTRL_BANK(n, m)	(0x1124 + 0x100 * (n - 1) + 0x40 * m)
+#define SWRM_DP_PORT_CTRL_EN_CHAN_SHFT				0x18
+#define SWRM_DP_PORT_CTRL_OFFSET2_SHFT				0x10
+#define SWRM_DP_PORT_CTRL_OFFSET1_SHFT				0x08
+#define SWRM_AHB_BRIDGE_WR_DATA_0				0xc85
+#define SWRM_AHB_BRIDGE_WR_ADDR_0				0xc89
+#define SWRM_AHB_BRIDGE_RD_ADDR_0				0xc8d
+#define SWRM_AHB_BRIDGE_RD_DATA_0				0xc91
+
+#define SWRM_REG_VAL_PACK(data, dev, id, reg)	\
+			((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24))
+
+#define SWRM_MAX_ROW_VAL	0 /* Rows = 48 */
+#define SWRM_DEFAULT_ROWS	48
+#define SWRM_MIN_COL_VAL	0 /* Cols = 2 */
+#define SWRM_DEFAULT_COL	16
+#define SWRM_MAX_COL_VAL	7
+#define SWRM_SPECIAL_CMD_ID	0xF
+#define MAX_FREQ_NUM		1
+#define TIMEOUT_MS		(2 * HZ)
+#define QCOM_SWRM_MAX_RD_LEN	0xf
+#define QCOM_SDW_MAX_PORTS	14
+#define DEFAULT_CLK_FREQ	9600000
+#define SWRM_MAX_DAIS		0xF
+
+struct qcom_swrm_port_config {
+	u8 si;
+	u8 off1;
+	u8 off2;
+};
+
+struct qcom_swrm_ctrl {
+	struct sdw_bus bus;
+	struct device *dev;
+	struct regmap *regmap;
+	struct completion *comp;
+	struct work_struct slave_work;
+	/* read/write lock */
+	spinlock_t comp_lock;
+	/* Port alloc/free lock */
+	struct mutex port_lock;
+	struct clk *hclk;
+	void __iomem *base;
+	u8 wr_cmd_id;
+	u8 rd_cmd_id;
+	int irq;
+	unsigned int version;
+	int num_din_ports;
+	int num_dout_ports;
+	unsigned long dout_port_mask;
+	unsigned long din_port_mask;
+	struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS];
+	struct sdw_stream_runtime *sruntime[SWRM_MAX_DAIS];
+	enum sdw_slave_status status[SDW_MAX_DEVICES];
+	int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val);
+	int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val);
+};
+
+#define to_qcom_sdw(b)	container_of(b, struct qcom_swrm_ctrl, bus)
+
+static int qcom_swrm_abh_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
+				  u32 *val)
+{
+	struct regmap *wcd_regmap = ctrl->regmap;
+	int ret;
+
+	/* pg register + offset */
+	ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_RD_ADDR_0,
+			  (u8 *)&reg, 4);
+	if (ret < 0)
+		return SDW_CMD_FAIL;
+
+	ret = regmap_bulk_read(wcd_regmap, SWRM_AHB_BRIDGE_RD_DATA_0,
+			       val, 4);
+	if (ret < 0)
+		return SDW_CMD_FAIL;
+
+	return SDW_CMD_OK;
+}
+
+static int qcom_swrm_mmio_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
+				   u32 *val)
+{
+	*val = readl_relaxed(ctrl->base + reg);
+
+	return 0;
+}
+
+static int qcom_swrm_mmio_reg_write(struct qcom_swrm_ctrl *ctrl,
+				    int reg, int val)
+{
+	writel_relaxed(val, ctrl->base + reg);
+
+	return 0;
+}
+
+static int qcom_swrm_ahb_reg_write(struct qcom_swrm_ctrl *ctrl,
+				   int reg, int val)
+{
+	struct regmap *wcd_regmap = ctrl->regmap;
+	int ret;
+	/* pg register + offset */
+	ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_DATA_0,
+			  (u8 *)&val, 4);
+	if (ret)
+		return SDW_CMD_FAIL;
+
+	/* write address register */
+	ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_ADDR_0,
+			  (u8 *)&reg, 4);
+	if (ret)
+		return SDW_CMD_FAIL;
+
+	return SDW_CMD_OK;
+}
+
+static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 cmd_data,
+				     u8 dev_addr, u16 reg_addr)
+{
+	DECLARE_COMPLETION_ONSTACK(comp);
+	unsigned long flags;
+	u32 val;
+	int ret;
+
+	spin_lock_irqsave(&ctrl->comp_lock, flags);
+	ctrl->comp = &comp;
+	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
+	val = SWRM_REG_VAL_PACK(cmd_data, dev_addr,
+				SWRM_SPECIAL_CMD_ID, reg_addr);
+	ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_WR_CMD, val);
+	if (ret)
+		goto err;
+
+	ret = wait_for_completion_timeout(ctrl->comp,
+					  msecs_to_jiffies(TIMEOUT_MS));
+
+	if (!ret)
+		ret = SDW_CMD_IGNORED;
+	else
+		ret = SDW_CMD_OK;
+err:
+	spin_lock_irqsave(&ctrl->comp_lock, flags);
+	ctrl->comp = NULL;
+	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
+
+	return ret;
+}
+
+static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *ctrl,
+				     u8 dev_addr, u16 reg_addr,
+				     u32 len, u8 *rval)
+{
+	int i, ret;
+	u32 val;
+	DECLARE_COMPLETION_ONSTACK(comp);
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctrl->comp_lock, flags);
+	ctrl->comp = &comp;
+	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
+
+	val = SWRM_REG_VAL_PACK(len, dev_addr, SWRM_SPECIAL_CMD_ID, reg_addr);
+	ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_RD_CMD, val);
+	if (ret)
+		goto err;
+
+	ret = wait_for_completion_timeout(ctrl->comp,
+					  msecs_to_jiffies(TIMEOUT_MS));
+
+	if (!ret) {
+		ret = SDW_CMD_IGNORED;
+		goto err;
+	} else {
+		ret = SDW_CMD_OK;
+	}
+
+	for (i = 0; i < len; i++) {
+		ret = ctrl->reg_read(ctrl, SWRM_CMD_FIFO_RD_FIFO_ADDR, &val);
+		if (ret)
+			return ret;
+
+		rval[i] = val & 0xFF;
+	}
+
+err:
+	spin_lock_irqsave(&ctrl->comp_lock, flags);
+	ctrl->comp = NULL;
+	spin_unlock_irqrestore(&ctrl->comp_lock, flags);
+
+	return ret;
+}
+
+static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl)
+{
+	u32 val;
+	int i;
+
+	ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
+
+	for (i = 0; i < SDW_MAX_DEVICES; i++) {
+		u32 s;
+
+		s = (val >> (i * 2));
+		s &= SWRM_MCP_SLV_STATUS_MASK;
+		ctrl->status[i] = s;
+	}
+}
+
+static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_id;
+	u32 sts, value;
+	unsigned long flags;
+
+	ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
+
+	if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
+		ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
+		dev_err_ratelimited(ctrl->dev,
+				    "CMD error, fifo status 0x%x\n",
+				     value);
+		ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
+	}
+
+	if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
+	    sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
+		schedule_work(&ctrl->slave_work);
+
+	ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR, sts);
+
+	if (sts & SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED) {
+		spin_lock_irqsave(&ctrl->comp_lock, flags);
+		if (ctrl->comp)
+			complete(ctrl->comp);
+		spin_unlock_irqrestore(&ctrl->comp_lock, flags);
+	}
+
+	return IRQ_HANDLED;
+}
+static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
+{
+	u32 val;
+
+	/* Clear Rows and Cols */
+	val = (SWRM_MAX_ROW_VAL << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
+	       SWRM_MIN_COL_VAL << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT);
+
+	ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
+
+	/* Disable Auto enumeration */
+	ctrl->reg_write(ctrl, SWRM_ENUMERATOR_CFG_ADDR, 0);
+
+	/* Mask soundwire interrupts */
+	ctrl->reg_write(ctrl, SWRM_INTERRUPT_MASK_ADDR,
+			SWRM_INTERRUPT_STATUS_RMSK);
+
+	/* Configure No pings */
+	ctrl->reg_read(ctrl, SWRM_MCP_CFG_ADDR, &val);
+	val &= ~SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK;
+	val |= (SWRM_DEF_CMD_NO_PINGS <<
+		SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_SHFT);
+	ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val);
+
+	/* Configure number of retries of a read/write cmd */
+	ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, SWRM_RD_WR_CMD_RETRIES);
+
+	/* Set IRQ to PULSE */
+	ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR,
+			SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK |
+			SWRM_COMP_CFG_ENABLE_MSK);
+	return 0;
+}
+
+static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus,
+						    struct sdw_msg *msg)
+{
+	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
+	int ret, i, len;
+
+	if (msg->flags == SDW_MSG_FLAG_READ) {
+		for (i = 0; i < msg->len;) {
+			if ((msg->len - i) < QCOM_SWRM_MAX_RD_LEN)
+				len = msg->len - i;
+			else
+				len = QCOM_SWRM_MAX_RD_LEN;
+
+			ret = qcom_swrm_cmd_fifo_rd_cmd(ctrl, msg->dev_num,
+							msg->addr + i, len,
+						       &msg->buf[i]);
+			if (ret)
+				return ret;
+
+			i = i + len;
+		}
+	} else if (msg->flags == SDW_MSG_FLAG_WRITE) {
+		for (i = 0; i < msg->len; i++) {
+			ret = qcom_swrm_cmd_fifo_wr_cmd(ctrl, msg->buf[i],
+							msg->dev_num,
+						       msg->addr + i);
+			if (ret)
+				return SDW_CMD_IGNORED;
+		}
+	}
+
+	return SDW_CMD_OK;
+}
+
+static int qcom_swrm_pre_bank_switch(struct sdw_bus *bus)
+{
+	u32 reg = SWRM_MCP_FRAME_CTRL_BANK_ADDR(bus->params.next_bank);
+	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
+	u32 val;
+	int ret;
+
+	ret = ctrl->reg_read(ctrl, reg, &val);
+	if (ret)
+		return ret;
+
+	val &= ~SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK;
+	val &= ~SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK;
+
+	val |= (SWRM_MAX_ROW_VAL << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
+		SWRM_MAX_COL_VAL << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT);
+
+	return ctrl->reg_write(ctrl, reg, val);
+}
+
+static int qcom_swrm_port_params(struct sdw_bus *bus,
+				 struct sdw_port_params *p_params,
+				 unsigned int bank)
+{
+	/* TBD */
+	return 0;
+}
+
+static int qcom_swrm_transport_params(struct sdw_bus *bus,
+				      struct sdw_transport_params *params,
+				      enum sdw_reg_bank bank)
+{
+	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
+	u32 value;
+
+	value = params->offset1 << SWRM_DP_PORT_CTRL_OFFSET1_SHFT;
+	value |= params->offset2 << SWRM_DP_PORT_CTRL_OFFSET2_SHFT;
+	value |= params->sample_interval - 1;
+
+	return ctrl->reg_write(ctrl,
+			       SWRM_DP_PORT_CTRL_BANK((params->port_num), bank),
+			       value);
+}
+
+static int qcom_swrm_port_enable(struct sdw_bus *bus,
+				 struct sdw_enable_ch *enable_ch,
+				 unsigned int bank)
+{
+	u32 reg = SWRM_DP_PORT_CTRL_BANK(enable_ch->port_num, bank);
+	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
+	u32 val;
+	int ret;
+
+	ret = ctrl->reg_read(ctrl, reg, &val);
+	if (ret)
+		return ret;
+
+	if (enable_ch->enable)
+		val |= (enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
+	else
+		val &= ~(enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
+
+	return ctrl->reg_write(ctrl, reg, val);
+}
+
+static struct sdw_master_port_ops qcom_swrm_port_ops = {
+	.dpn_set_port_params = qcom_swrm_port_params,
+	.dpn_set_port_transport_params = qcom_swrm_transport_params,
+	.dpn_port_enable_ch = qcom_swrm_port_enable,
+};
+
+static struct sdw_master_ops qcom_swrm_ops = {
+	.xfer_msg = qcom_swrm_xfer_msg,
+	.pre_bank_switch = qcom_swrm_pre_bank_switch,
+};
+
+static int qcom_swrm_compute_params(struct sdw_bus *bus)
+{
+	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
+	struct sdw_master_runtime *m_rt;
+	struct sdw_slave_runtime *s_rt;
+	struct sdw_port_runtime *p_rt;
+	struct qcom_swrm_port_config *pcfg;
+	int i = 0;
+
+	list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
+		list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
+			pcfg = &ctrl->pconfig[p_rt->num - 1];
+			p_rt->transport_params.port_num = p_rt->num;
+			p_rt->transport_params.sample_interval = pcfg->si + 1;
+			p_rt->transport_params.offset1 = pcfg->off1;
+			p_rt->transport_params.offset2 = pcfg->off2;
+		}
+
+		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
+			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
+				pcfg = &ctrl->pconfig[i];
+				p_rt->transport_params.port_num = p_rt->num;
+				p_rt->transport_params.sample_interval =
+					pcfg->si + 1;
+				p_rt->transport_params.offset1 = pcfg->off1;
+				p_rt->transport_params.offset2 = pcfg->off2;
+				i++;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static u32 qcom_swrm_freq_tbl[MAX_FREQ_NUM] = {
+	DEFAULT_CLK_FREQ,
+};
+
+static void qcom_swrm_slave_wq(struct work_struct *work)
+{
+	struct qcom_swrm_ctrl *ctrl =
+			container_of(work, struct qcom_swrm_ctrl, slave_work);
+
+	qcom_swrm_get_device_status(ctrl);
+	sdw_handle_slave_status(&ctrl->bus, ctrl->status);
+}
+
+static int qcom_swrm_prepare(struct snd_pcm_substream *substream,
+			     struct snd_soc_dai *dai)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+
+	if (!ctrl->sruntime[dai->id])
+		return -EINVAL;
+
+	return sdw_enable_stream(ctrl->sruntime[dai->id]);
+}
+
+static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl,
+					struct sdw_stream_runtime *stream)
+{
+	struct sdw_master_runtime *m_rt;
+	struct sdw_port_runtime *p_rt;
+	unsigned long *port_mask;
+
+	mutex_lock(&ctrl->port_lock);
+
+	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
+		if (m_rt->direction == SDW_DATA_DIR_RX)
+			port_mask = &ctrl->dout_port_mask;
+		else
+			port_mask = &ctrl->din_port_mask;
+
+		list_for_each_entry(p_rt, &m_rt->port_list, port_node)
+			clear_bit(p_rt->num - 1, port_mask);
+	}
+
+	mutex_unlock(&ctrl->port_lock);
+}
+
+static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
+					struct sdw_stream_runtime *stream,
+				       struct snd_pcm_hw_params *params,
+				       int direction)
+{
+	struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS];
+	struct sdw_stream_config sconfig;
+	struct sdw_master_runtime *m_rt;
+	struct sdw_slave_runtime *s_rt;
+	struct sdw_port_runtime *p_rt;
+	unsigned long *port_mask;
+	int i, maxport, pn, nports = 0, ret = 0;
+
+	mutex_lock(&ctrl->port_lock);
+	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
+		if (m_rt->direction == SDW_DATA_DIR_RX) {
+			maxport = ctrl->num_dout_ports;
+			port_mask = &ctrl->dout_port_mask;
+		} else {
+			maxport = ctrl->num_din_ports;
+			port_mask = &ctrl->din_port_mask;
+		}
+
+		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
+			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
+				/* Port numbers start from 1 - 14*/
+				pn = find_first_zero_bit(port_mask, maxport);
+				if (pn > (maxport - 1)) {
+					dev_err(ctrl->dev, "All ports busy\n");
+					ret = -EBUSY;
+					goto err;
+				}
+				set_bit(pn, port_mask);
+				pconfig[nports].num = pn + 1;
+				pconfig[nports].ch_mask = p_rt->ch_mask;
+				nports++;
+			}
+		}
+	}
+
+	if (direction == SNDRV_PCM_STREAM_CAPTURE)
+		sconfig.direction = SDW_DATA_DIR_TX;
+	else
+		sconfig.direction = SDW_DATA_DIR_RX;
+
+	sconfig.ch_count = 1;
+	sconfig.frame_rate = params_rate(params);
+	sconfig.type = stream->type;
+	sconfig.bps = 1;
+	sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig,
+			      nports, stream);
+err:
+	if (ret) {
+		for (i = 0; i < nports; i++)
+			clear_bit(pconfig[i].num - 1, port_mask);
+	}
+
+	mutex_unlock(&ctrl->port_lock);
+
+	return ret;
+}
+
+static int qcom_swrm_hw_params(struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params,
+			      struct snd_soc_dai *dai)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+	struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
+	int ret;
+
+	ret = qcom_swrm_stream_alloc_ports(ctrl, sruntime, params,
+					   substream->stream);
+	if (ret)
+		return ret;
+
+	ret = sdw_prepare_stream(sruntime);
+	if (ret)
+		qcom_swrm_stream_free_ports(ctrl, sruntime);
+
+	return ret;
+}
+
+static int qcom_swrm_hw_free(struct snd_pcm_substream *substream,
+			     struct snd_soc_dai *dai)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+	struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
+
+	qcom_swrm_stream_free_ports(ctrl, sruntime);
+	sdw_stream_remove_master(&ctrl->bus, sruntime);
+	sdw_deprepare_stream(sruntime);
+	sdw_disable_stream(sruntime);
+
+	return 0;
+}
+
+static int qcom_swrm_set_sdw_stream(struct snd_soc_dai *dai,
+                                   void *stream, int direction)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+
+	ctrl->sruntime[dai->id] = stream;
+
+	return 0;
+}
+
+static int qcom_swrm_startup(struct snd_pcm_substream *stream,
+			     struct snd_soc_dai *dai)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+	struct snd_soc_pcm_runtime *rtd = stream->private_data;
+	struct sdw_stream_runtime *sruntime;
+	int ret, i;
+
+	sruntime = sdw_alloc_stream(dai->name);
+	if (!sruntime)
+		return -ENOMEM;
+
+	ctrl->sruntime[dai->id] = sruntime;
+
+	for (i = 0; i < rtd->num_codecs; i++) {
+		ret = snd_soc_dai_set_sdw_stream(rtd->codec_dais[i], sruntime,
+						 stream->stream);
+		if (ret < 0 && ret != -ENOTSUPP) {
+			dev_err(dai->dev, "Failed to set sdw stream on %s",
+				rtd->codec_dais[i]->name);
+			sdw_release_stream(sruntime);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static void qcom_swrm_shutdown(struct snd_pcm_substream *stream,
+			       struct snd_soc_dai *dai)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+
+	sdw_release_stream(ctrl->sruntime[dai->id]);
+	ctrl->sruntime[dai->id] = NULL;
+}
+
+static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
+	.hw_params = qcom_swrm_hw_params,
+	.prepare = qcom_swrm_prepare,
+	.hw_free = qcom_swrm_hw_free,
+	.startup = qcom_swrm_startup,
+	.shutdown = qcom_swrm_shutdown,
+        .set_sdw_stream = qcom_swrm_set_sdw_stream,
+};
+
+static const struct snd_soc_component_driver qcom_swrm_dai_component = {
+	.name           = "soundwire",
+};
+
+static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl)
+{
+	int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports;
+	struct snd_soc_dai_driver *dais;
+	struct snd_soc_pcm_stream *stream;
+	struct device *dev = ctrl->dev;
+	int i;
+
+	/* PDM dais are only tested for now */
+	dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
+	if (!dais)
+		return -ENOMEM;
+
+	for (i = 0; i < num_dais; i++) {
+		dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i);
+		if (!dais[i].name)
+			return -ENOMEM;
+
+		if (i < ctrl->num_dout_ports) {
+			stream = &dais[i].playback;
+			stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
+							     "SDW Tx%d", i);
+		} else {
+			stream = &dais[i].capture;
+			stream->stream_name = devm_kasprintf(dev, GFP_KERNEL,
+							     "SDW Rx%d", i);
+		}
+
+		if (!stream->stream_name)
+			return -ENOMEM;
+
+		stream->channels_min = 1;
+		stream->channels_max = 1;
+		stream->rates = SNDRV_PCM_RATE_48000;
+		stream->formats = SNDRV_PCM_FMTBIT_S16_LE;
+
+		dais[i].ops = &qcom_swrm_pdm_dai_ops;
+		dais[i].id = i;
+	}
+
+	return devm_snd_soc_register_component(ctrl->dev,
+						&qcom_swrm_dai_component,
+						dais, num_dais);
+}
+
+static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl)
+{
+	struct device_node *np = ctrl->dev->of_node;
+	u8 off1[QCOM_SDW_MAX_PORTS];
+	u8 off2[QCOM_SDW_MAX_PORTS];
+	u8 si[QCOM_SDW_MAX_PORTS];
+	int i, ret, nports, val;
+
+	ret = ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
+	if (ret)
+		return ret;
+
+	ctrl->num_dout_ports = val & SWRM_COMP_PARAMS_DOUT_PORTS_MASK;
+	ctrl->num_din_ports = (val & SWRM_COMP_PARAMS_DIN_PORTS_MASK) >> 5;
+
+	ret = of_property_read_u32(np, "qcom,din-ports", &val);
+	if (ret)
+		return ret;
+
+	if (val > ctrl->num_din_ports)
+		return -EINVAL;
+
+	ctrl->num_din_ports = val;
+
+	ret = of_property_read_u32(np, "qcom,dout-ports", &val);
+	if (ret)
+		return ret;
+
+	if (val > ctrl->num_dout_ports)
+		return -EINVAL;
+
+	ctrl->num_dout_ports = val;
+
+	nports = ctrl->num_dout_ports + ctrl->num_din_ports;
+
+	ret = of_property_read_u8_array(np, "qcom,ports-offset1",
+					off1, nports);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u8_array(np, "qcom,ports-offset2",
+					off2, nports);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u8_array(np, "qcom,ports-sinterval-low",
+					si, nports);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < nports; i++) {
+		ctrl->pconfig[i].si = si[i];
+		ctrl->pconfig[i].off1 = off1[i];
+		ctrl->pconfig[i].off2 = off2[i];
+	}
+
+	return 0;
+}
+
+static int qcom_swrm_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct sdw_master_prop *prop;
+	struct sdw_bus_params *params;
+	struct qcom_swrm_ctrl *ctrl;
+	struct resource *res;
+	int ret;
+	u32 val;
+
+	ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
+	if (!ctrl)
+		return -ENOMEM;
+
+	if (dev->parent->bus == &slimbus_bus) {
+		ctrl->reg_read = qcom_swrm_abh_reg_read;
+		ctrl->reg_write = qcom_swrm_ahb_reg_write;
+		ctrl->regmap = dev_get_regmap(dev->parent, NULL);
+		if (!ctrl->regmap)
+			return -EINVAL;
+	} else {
+		ctrl->reg_read = qcom_swrm_mmio_reg_read;
+		ctrl->reg_write = qcom_swrm_mmio_reg_write;
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		ctrl->base = devm_ioremap_resource(dev, res);
+		if (IS_ERR(ctrl->base))
+			return PTR_ERR(ctrl->base);
+	}
+
+	ctrl->irq = of_irq_get(dev->of_node, 0);
+	if (ctrl->irq < 0)
+		return ctrl->irq;
+
+	ctrl->hclk = devm_clk_get(dev, "iface");
+	if (IS_ERR(ctrl->hclk))
+		return PTR_ERR(ctrl->hclk);
+
+	clk_prepare_enable(ctrl->hclk);
+
+	ctrl->dev = dev;
+	dev_set_drvdata(&pdev->dev, ctrl);
+	spin_lock_init(&ctrl->comp_lock);
+	mutex_init(&ctrl->port_lock);
+	INIT_WORK(&ctrl->slave_work, qcom_swrm_slave_wq);
+
+	ctrl->bus.dev = dev;
+	ctrl->bus.ops = &qcom_swrm_ops;
+	ctrl->bus.port_ops = &qcom_swrm_port_ops;
+	ctrl->bus.compute_params = &qcom_swrm_compute_params;
+
+	ret = qcom_swrm_get_port_config(ctrl);
+	if (ret)
+		return ret;
+
+	params = &ctrl->bus.params;
+	params->max_dr_freq = DEFAULT_CLK_FREQ;
+	params->curr_dr_freq = DEFAULT_CLK_FREQ;
+	params->col = SWRM_DEFAULT_COL;
+	params->row = SWRM_DEFAULT_ROWS;
+	ctrl->reg_read(ctrl, SWRM_MCP_STATUS, &val);
+	params->curr_bank = val & SWRM_MCP_STATUS_BANK_NUM_MASK;
+	params->next_bank = !params->curr_bank;
+
+	prop = &ctrl->bus.prop;
+	prop->max_clk_freq = DEFAULT_CLK_FREQ;
+	prop->num_clk_gears = 0;
+	prop->num_clk_freq = MAX_FREQ_NUM;
+	prop->clk_freq = &qcom_swrm_freq_tbl[0];
+	prop->default_col = SWRM_DEFAULT_COL;
+	prop->default_row = SWRM_DEFAULT_ROWS;
+
+	ctrl->reg_read(ctrl, SWRM_COMP_HW_VERSION, &ctrl->version);
+
+	ret = devm_request_threaded_irq(dev, ctrl->irq, NULL,
+					qcom_swrm_irq_handler,
+					IRQF_TRIGGER_RISING,
+					"soundwire", ctrl);
+	if (ret) {
+		dev_err(dev, "Failed to request soundwire irq\n");
+		goto err;
+	}
+
+	ret = sdw_add_bus_master(&ctrl->bus);
+	if (ret) {
+		dev_err(dev, "Failed to register Soundwire controller (%d)\n",
+			ret);
+		goto err;
+	}
+
+	qcom_swrm_init(ctrl);
+	ret = qcom_swrm_register_dais(ctrl);
+	if (ret)
+		goto err;
+
+	dev_info(dev, "Qualcomm Soundwire controller v%x.%x.%x Registered\n",
+		 (ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff,
+		 ctrl->version & 0xffff);
+
+	return 0;
+err:
+	clk_disable_unprepare(ctrl->hclk);
+	return ret;
+}
+
+static int qcom_swrm_remove(struct platform_device *pdev)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
+
+	sdw_delete_bus_master(&ctrl->bus);
+	clk_disable_unprepare(ctrl->hclk);
+
+	return 0;
+}
+
+static int qcom_swrm_runtime_suspend(struct device *device)
+{
+	/* TBD */
+	return 0;
+}
+
+static int qcom_swrm_runtime_resume(struct device *device)
+{
+	/* TBD */
+	return 0;
+}
+
+static const struct dev_pm_ops qcom_swrm_dev_pm_ops = {
+	SET_RUNTIME_PM_OPS(qcom_swrm_runtime_suspend,
+			   qcom_swrm_runtime_resume,
+			   NULL
+	)
+};
+
+static const struct of_device_id qcom_swrm_of_match[] = {
+	{ .compatible = "qcom,soundwire-v1.3.0",},
+	{ .compatible = "qcom,soundwire-v1.5.0",},
+	{ .compatible = "qcom,soundwire-v1.6.0",},
+	{/* sentinel */},
+};
+
+MODULE_DEVICE_TABLE(of, qcom_swrm_of_match);
+
+static struct platform_driver qcom_swrm_driver = {
+	.probe	= &qcom_swrm_probe,
+	.remove = &qcom_swrm_remove,
+	.driver = {
+		.name	= "qcom-soundwire",
+		.of_match_table = qcom_swrm_of_match,
+		.pm = &qcom_swrm_dev_pm_ops,
+	}
+};
+module_platform_driver(qcom_swrm_driver);
+
+MODULE_DESCRIPTION("Qualcomm soundwire driver");
+MODULE_LICENSE("GPL v2");