1 files changed, 523 insertions, 2 deletions

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 86a7bd1fc912..0a8990e758f9 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -9,6 +9,8 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
 #include <linux/soundwire/sdw_registers.h>
 #include <linux/soundwire/sdw.h>
 #include <linux/soundwire/sdw_intel.h>
@@ -85,6 +87,12 @@
 #define SDW_ALH_STRMZCFG_DMAT		GENMASK(7, 0)
 #define SDW_ALH_STRMZCFG_CHN		GENMASK(19, 16)
 
+enum intel_pdi_type {
+	INTEL_PDI_IN = 0,
+	INTEL_PDI_OUT = 1,
+	INTEL_PDI_BD = 2,
+};
+
 struct sdw_intel {
 	struct sdw_cdns cdns;
 	int instance;
@@ -234,6 +242,490 @@ static int intel_shim_init(struct sdw_intel *sdw)
 	return ret;
 }
 
+/*
+ * PDI routines
+ */
+static void intel_pdi_init(struct sdw_intel *sdw,
+			struct sdw_cdns_stream_config *config)
+{
+	void __iomem *shim = sdw->res->shim;
+	unsigned int link_id = sdw->instance;
+	int pcm_cap, pdm_cap;
+
+	/* PCM Stream Capability */
+	pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
+
+	config->pcm_bd = (pcm_cap & SDW_SHIM_PCMSCAP_BSS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_BSS);
+	config->pcm_in = (pcm_cap & SDW_SHIM_PCMSCAP_ISS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_ISS);
+	config->pcm_out = (pcm_cap & SDW_SHIM_PCMSCAP_OSS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_OSS);
+
+	/* PDM Stream Capability */
+	pdm_cap = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
+
+	config->pdm_bd = (pdm_cap & SDW_SHIM_PDMSCAP_BSS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_BSS);
+	config->pdm_in = (pdm_cap & SDW_SHIM_PDMSCAP_ISS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_ISS);
+	config->pdm_out = (pdm_cap & SDW_SHIM_PDMSCAP_OSS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_OSS);
+}
+
+static int
+intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num, bool pcm)
+{
+	void __iomem *shim = sdw->res->shim;
+	unsigned int link_id = sdw->instance;
+	int count;
+
+	if (pcm) {
+		count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
+	} else {
+		count = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
+		count = ((count & SDW_SHIM_PDMSCAP_CPSS) >>
+					SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_CPSS));
+	}
+
+	/* zero based values for channel count in register */
+	count++;
+
+	return count;
+}
+
+static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
+				struct sdw_cdns_pdi *pdi,
+				unsigned int num_pdi,
+				unsigned int *num_ch, bool pcm)
+{
+	int i, ch_count = 0;
+
+	for (i = 0; i < num_pdi; i++) {
+		pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num, pcm);
+		ch_count += pdi->ch_count;
+		pdi++;
+	}
+
+	*num_ch = ch_count;
+	return 0;
+}
+
+static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
+				struct sdw_cdns_streams *stream, bool pcm)
+{
+	intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
+			&stream->num_ch_bd, pcm);
+
+	intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
+			&stream->num_ch_in, pcm);
+
+	intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
+			&stream->num_ch_out, pcm);
+
+	return 0;
+}
+
+static int intel_pdi_ch_update(struct sdw_intel *sdw)
+{
+	/* First update PCM streams followed by PDM streams */
+	intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm, true);
+	intel_pdi_stream_ch_update(sdw, &sdw->cdns.pdm, false);
+
+	return 0;
+}
+
+static void
+intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
+{
+	void __iomem *shim = sdw->res->shim;
+	unsigned int link_id = sdw->instance;
+	int pdi_conf = 0;
+
+	pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
+
+	/*
+	 * Program stream parameters to stream SHIM register
+	 * This is applicable for PCM stream only.
+	 */
+	if (pdi->type != SDW_STREAM_PCM)
+		return;
+
+	if (pdi->dir == SDW_DATA_DIR_RX)
+		pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
+	else
+		pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
+
+	pdi_conf |= (pdi->intel_alh_id <<
+			SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_STREAM));
+	pdi_conf |= (pdi->l_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_LCHN));
+	pdi_conf |= (pdi->h_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_HCHN));
+
+	intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
+}
+
+static void
+intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
+{
+	void __iomem *alh = sdw->res->alh;
+	unsigned int link_id = sdw->instance;
+	unsigned int conf;
+
+	pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
+
+	/* Program Stream config ALH register */
+	conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
+
+	conf |= (SDW_ALH_STRMZCFG_DMAT_VAL <<
+			SDW_REG_SHIFT(SDW_ALH_STRMZCFG_DMAT));
+
+	conf |= ((pdi->ch_count - 1) <<
+			SDW_REG_SHIFT(SDW_ALH_STRMZCFG_CHN));
+
+	intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
+}
+
+static int intel_config_stream(struct sdw_intel *sdw,
+			struct snd_pcm_substream *substream,
+			struct snd_soc_dai *dai,
+			struct snd_pcm_hw_params *hw_params, int link_id)
+{
+	if (sdw->res->ops && sdw->res->ops->config_stream)
+		return sdw->res->ops->config_stream(sdw->res->arg,
+				substream, dai, hw_params, link_id);
+
+	return -EIO;
+}
+
+/*
+ * DAI routines
+ */
+
+static struct sdw_cdns_port *intel_alloc_port(struct sdw_intel *sdw,
+				u32 ch, u32 dir, bool pcm)
+{
+	struct sdw_cdns *cdns = &sdw->cdns;
+	struct sdw_cdns_port *port = NULL;
+	int i, ret = 0;
+
+	for (i = 0; i < cdns->num_ports; i++) {
+		if (cdns->ports[i].assigned == true)
+			continue;
+
+		port = &cdns->ports[i];
+		port->assigned = true;
+		port->direction = dir;
+		port->ch = ch;
+		break;
+	}
+
+	if (!port) {
+		dev_err(cdns->dev, "Unable to find a free port\n");
+		return NULL;
+	}
+
+	if (pcm) {
+		ret = sdw_cdns_alloc_stream(cdns, &cdns->pcm, port, ch, dir);
+		if (ret)
+			goto out;
+
+		intel_pdi_shim_configure(sdw, port->pdi);
+		sdw_cdns_config_stream(cdns, port, ch, dir, port->pdi);
+
+		intel_pdi_alh_configure(sdw, port->pdi);
+
+	} else {
+		ret = sdw_cdns_alloc_stream(cdns, &cdns->pdm, port, ch, dir);
+	}
+
+out:
+	if (ret) {
+		port->assigned = false;
+		port = NULL;
+	}
+
+	return port;
+}
+
+static void intel_port_cleanup(struct sdw_cdns_dma_data *dma)
+{
+	int i;
+
+	for (i = 0; i < dma->nr_ports; i++) {
+		if (dma->port[i]) {
+			dma->port[i]->pdi->assigned = false;
+			dma->port[i]->pdi = NULL;
+			dma->port[i]->assigned = false;
+			dma->port[i] = NULL;
+		}
+	}
+}
+
+static int intel_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params,
+				struct snd_soc_dai *dai)
+{
+	struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_cdns_dma_data *dma;
+	struct sdw_stream_config sconfig;
+	struct sdw_port_config *pconfig;
+	int ret, i, ch, dir;
+	bool pcm = true;
+
+	dma = snd_soc_dai_get_dma_data(dai, substream);
+	if (!dma)
+		return -EIO;
+
+	ch = params_channels(params);
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		dir = SDW_DATA_DIR_RX;
+	else
+		dir = SDW_DATA_DIR_TX;
+
+	if (dma->stream_type == SDW_STREAM_PDM) {
+		/* TODO: Check whether PDM decimator is already in use */
+		dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pdm, ch, dir);
+		pcm = false;
+	} else {
+		dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pcm, ch, dir);
+	}
+
+	if (!dma->nr_ports) {
+		dev_err(dai->dev, "ports/resources not available");
+		return -EINVAL;
+	}
+
+	dma->port = kcalloc(dma->nr_ports, sizeof(*dma->port), GFP_KERNEL);
+	if (!dma->port)
+		return -ENOMEM;
+
+	for (i = 0; i < dma->nr_ports; i++) {
+		dma->port[i] = intel_alloc_port(sdw, ch, dir, pcm);
+		if (!dma->port[i]) {
+			ret = -EINVAL;
+			goto port_error;
+		}
+	}
+
+	/* Inform DSP about PDI stream number */
+	for (i = 0; i < dma->nr_ports; i++) {
+		ret = intel_config_stream(sdw, substream, dai, params,
+				dma->port[i]->pdi->intel_alh_id);
+		if (ret)
+			goto port_error;
+	}
+
+	sconfig.direction = dir;
+	sconfig.ch_count = ch;
+	sconfig.frame_rate = params_rate(params);
+	sconfig.type = dma->stream_type;
+
+	if (dma->stream_type == SDW_STREAM_PDM) {
+		sconfig.frame_rate *= 50;
+		sconfig.bps = 1;
+	} else {
+		sconfig.bps = snd_pcm_format_width(params_format(params));
+	}
+
+	/* Port configuration */
+	pconfig = kcalloc(dma->nr_ports, sizeof(*pconfig), GFP_KERNEL);
+	if (!pconfig) {
+		ret =  -ENOMEM;
+		goto port_error;
+	}
+
+	for (i = 0; i < dma->nr_ports; i++) {
+		pconfig[i].num = dma->port[i]->num;
+		pconfig[i].ch_mask = (1 << ch) - 1;
+	}
+
+	ret = sdw_stream_add_master(&cdns->bus, &sconfig,
+				pconfig, dma->nr_ports, dma->stream);
+	if (ret) {
+		dev_err(cdns->dev, "add master to stream failed:%d", ret);
+		goto stream_error;
+	}
+
+	kfree(pconfig);
+	return ret;
+
+stream_error:
+	kfree(pconfig);
+port_error:
+	intel_port_cleanup(dma);
+	kfree(dma->port);
+	return ret;
+}
+
+static int
+intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+	struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+	struct sdw_cdns_dma_data *dma;
+	int ret;
+
+	dma = snd_soc_dai_get_dma_data(dai, substream);
+	if (!dma)
+		return -EIO;
+
+	ret = sdw_stream_remove_master(&cdns->bus, dma->stream);
+	if (ret < 0)
+		dev_err(dai->dev, "remove master from stream %s failed: %d",
+							dma->stream->name, ret);
+
+	intel_port_cleanup(dma);
+	kfree(dma->port);
+	return ret;
+}
+
+static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
+					void *stream, int direction)
+{
+	return cdns_set_sdw_stream(dai, stream, true, direction);
+}
+
+static int intel_pdm_set_sdw_stream(struct snd_soc_dai *dai,
+					void *stream, int direction)
+{
+	return cdns_set_sdw_stream(dai, stream, false, direction);
+}
+
+static struct snd_soc_dai_ops intel_pcm_dai_ops = {
+	.hw_params = intel_hw_params,
+	.hw_free = intel_hw_free,
+	.shutdown = sdw_cdns_shutdown,
+	.set_sdw_stream = intel_pcm_set_sdw_stream,
+};
+
+static struct snd_soc_dai_ops intel_pdm_dai_ops = {
+	.hw_params = intel_hw_params,
+	.hw_free = intel_hw_free,
+	.shutdown = sdw_cdns_shutdown,
+	.set_sdw_stream = intel_pdm_set_sdw_stream,
+};
+
+static const struct snd_soc_component_driver dai_component = {
+	.name           = "soundwire",
+};
+
+static int intel_create_dai(struct sdw_cdns *cdns,
+			struct snd_soc_dai_driver *dais,
+			enum intel_pdi_type type,
+			u32 num, u32 off, u32 max_ch, bool pcm)
+{
+	int i;
+
+	if (num == 0)
+		return 0;
+
+	 /* TODO: Read supported rates/formats from hardware */
+	for (i = off; i < (off + num); i++) {
+		dais[i].name = kasprintf(GFP_KERNEL, "SDW%d Pin%d",
+					cdns->instance, i);
+		if (!dais[i].name)
+			return -ENOMEM;
+
+		if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
+			dais[i].playback.stream_name = kasprintf(GFP_KERNEL,
+							"SDW%d Tx%d",
+							cdns->instance, i);
+			if (!dais[i].playback.stream_name) {
+				kfree(dais[i].name);
+				return -ENOMEM;
+			}
+
+			dais[i].playback.channels_min = 1;
+			dais[i].playback.channels_max = max_ch;
+			dais[i].playback.rates = SNDRV_PCM_RATE_48000;
+			dais[i].playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
+		}
+
+		if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
+			dais[i].capture.stream_name = kasprintf(GFP_KERNEL,
+							"SDW%d Rx%d",
+							cdns->instance, i);
+			if (!dais[i].capture.stream_name) {
+				kfree(dais[i].name);
+				kfree(dais[i].playback.stream_name);
+				return -ENOMEM;
+			}
+
+			dais[i].playback.channels_min = 1;
+			dais[i].playback.channels_max = max_ch;
+			dais[i].capture.rates = SNDRV_PCM_RATE_48000;
+			dais[i].capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
+		}
+
+		dais[i].id = SDW_DAI_ID_RANGE_START + i;
+
+		if (pcm)
+			dais[i].ops = &intel_pcm_dai_ops;
+		else
+			dais[i].ops = &intel_pdm_dai_ops;
+	}
+
+	return 0;
+}
+
+static int intel_register_dai(struct sdw_intel *sdw)
+{
+	struct sdw_cdns *cdns = &sdw->cdns;
+	struct sdw_cdns_streams *stream;
+	struct snd_soc_dai_driver *dais;
+	int num_dai, ret, off = 0;
+
+	/* DAIs are created based on total number of PDIs supported */
+	num_dai = cdns->pcm.num_pdi + cdns->pdm.num_pdi;
+
+	dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
+	if (!dais)
+		return -ENOMEM;
+
+	/* Create PCM DAIs */
+	stream = &cdns->pcm;
+
+	ret = intel_create_dai(cdns, dais, INTEL_PDI_IN,
+			stream->num_in, off, stream->num_ch_in, true);
+	if (ret)
+		return ret;
+
+	off += cdns->pcm.num_in;
+	ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT,
+			cdns->pcm.num_out, off, stream->num_ch_out, true);
+	if (ret)
+		return ret;
+
+	off += cdns->pcm.num_out;
+	ret = intel_create_dai(cdns, dais, INTEL_PDI_BD,
+			cdns->pcm.num_bd, off, stream->num_ch_bd, true);
+	if (ret)
+		return ret;
+
+	/* Create PDM DAIs */
+	stream = &cdns->pdm;
+	off += cdns->pcm.num_bd;
+	ret = intel_create_dai(cdns, dais, INTEL_PDI_IN,
+			cdns->pdm.num_in, off, stream->num_ch_in, false);
+	if (ret)
+		return ret;
+
+	off += cdns->pdm.num_in;
+	ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT,
+			cdns->pdm.num_out, off, stream->num_ch_out, false);
+	if (ret)
+		return ret;
+
+	off += cdns->pdm.num_bd;
+	ret = intel_create_dai(cdns, dais, INTEL_PDI_BD,
+			cdns->pdm.num_bd, off, stream->num_ch_bd, false);
+	if (ret)
+		return ret;
+
+	return snd_soc_register_component(cdns->dev, &dai_component,
+				dais, num_dai);
+}
+
 static int intel_prop_read(struct sdw_bus *bus)
 {
 	/* Initialize with default handler to read all DisCo properties */
@@ -252,11 +744,20 @@ static int intel_prop_read(struct sdw_bus *bus)
 	return 0;
 }
 
+static struct sdw_master_ops sdw_intel_ops = {
+	.read_prop = sdw_master_read_prop,
+	.xfer_msg = cdns_xfer_msg,
+	.xfer_msg_defer = cdns_xfer_msg_defer,
+	.reset_page_addr = cdns_reset_page_addr,
+	.set_bus_conf = cdns_bus_conf,
+};
+
 /*
  * probe and init
  */
 static int intel_probe(struct platform_device *pdev)
 {
+	struct sdw_cdns_stream_config config;
 	struct sdw_intel *sdw;
 	int ret;
 
@@ -276,8 +777,11 @@ static int intel_probe(struct platform_device *pdev)
 	sdw_cdns_probe(&sdw->cdns);
 
 	/* Set property read ops */
-	sdw_cdns_master_ops.read_prop = intel_prop_read;
-	sdw->cdns.bus.ops = &sdw_cdns_master_ops;
+	sdw_intel_ops.read_prop = intel_prop_read;
+	sdw->cdns.bus.ops = &sdw_intel_ops;
+
+	sdw_intel_ops.read_prop = intel_prop_read;
+	sdw->cdns.bus.ops = &sdw_intel_ops;
 
 	platform_set_drvdata(pdev, sdw);
 
@@ -296,9 +800,15 @@ static int intel_probe(struct platform_device *pdev)
 		goto err_init;
 
 	ret = sdw_cdns_enable_interrupt(&sdw->cdns);
+
+	/* Read the PDI config and initialize cadence PDI */
+	intel_pdi_init(sdw, &config);
+	ret = sdw_cdns_pdi_init(&sdw->cdns, config);
 	if (ret)
 		goto err_init;
 
+	intel_pdi_ch_update(sdw);
+
 	/* Acquire IRQ */
 	ret = request_threaded_irq(sdw->res->irq, sdw_cdns_irq,
 			sdw_cdns_thread, IRQF_SHARED, KBUILD_MODNAME,
@@ -309,8 +819,18 @@ static int intel_probe(struct platform_device *pdev)
 		goto err_init;
 	}
 
+	/* Register DAIs */
+	ret = intel_register_dai(sdw);
+	if (ret) {
+		dev_err(sdw->cdns.dev, "DAI registration failed: %d", ret);
+		snd_soc_unregister_component(sdw->cdns.dev);
+		goto err_dai;
+	}
+
 	return 0;
 
+err_dai:
+	free_irq(sdw->res->irq, sdw);
 err_init:
 	sdw_delete_bus_master(&sdw->cdns.bus);
 err_master_reg:
@@ -324,6 +844,7 @@ static int intel_remove(struct platform_device *pdev)
 	sdw = platform_get_drvdata(pdev);
 
 	free_irq(sdw->res->irq, sdw);
+	snd_soc_unregister_component(sdw->cdns.dev);
 	sdw_delete_bus_master(&sdw->cdns.bus);
 
 	return 0;