summaryrefslogtreecommitdiff
path: root/drivers/soundwire/intel.c
diff options
context:
space:
mode:
authorVinod Koul <vkoul@kernel.org>2018-04-26 18:38:58 +0530
committerVinod Koul <vkoul@kernel.org>2018-05-11 21:48:07 +0530
commit37a2d22b402d6713b1a21a30416550e716a9327b (patch)
tree9b5dfb3c463cecba8a85c1e60bf7bc4c246f9cbf /drivers/soundwire/intel.c
parent5d6b3c8ba12a20519130c6b49ac40790426efbfd (diff)
soundwire: intel: Add stream initialization
Add Intel stream init routines which initialize the Physical Data Interface (PDI), Audio Link Hub (ALH) and Audio shim. Also add bank switch routines. Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/intel.c')
-rw-r--r--drivers/soundwire/intel.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index a64f87a08cfd..707e435b5da1 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>
@@ -234,6 +236,149 @@ 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_prop_read(struct sdw_bus *bus)
{
/* Initialize with default handler to read all DisCo properties */
@@ -265,6 +410,7 @@ static struct sdw_master_ops sdw_intel_ops = {
*/
static int intel_probe(struct platform_device *pdev)
{
+ struct sdw_cdns_stream_config config;
struct sdw_intel *sdw;
int ret;
@@ -287,6 +433,9 @@ static int intel_probe(struct platform_device *pdev)
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);
ret = sdw_add_bus_master(&sdw->cdns.bus);
@@ -304,9 +453,15 @@ 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,