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path: root/drivers/soundwire/intel.c
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Diffstat (limited to 'drivers/soundwire/intel.c')
-rw-r--r--drivers/soundwire/intel.c525
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;