[PATCH 17/20] soundwire: intel_ace2x: enable wake support

Bard Liao
2023-03-23T05:32:41Z

The WAKEEN and WAKESTS registers were moved to the per-link SHIM_VS
area.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
drivers/soundwire/intel_ace2x.c | 38 +++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)

diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c
index 2e33e8a00b55..fe950b3ea3bc 100644
--- a/drivers/soundwire/intel_ace2x.c
+++ b/drivers/soundwire/intel_ace2x.c
@@ -31,6 +31,41 @@ static void intel_shim_vs_init(struct sdw_intel *sdw)
usleep_range(10, 15);
}

+static int intel_shim_check_wake(struct sdw_intel *sdw)
+{
+ void __iomem *shim_vs;
+ u16 wake_sts;
+
+ shim_vs = sdw->link_res->shim_vs;
+ wake_sts = intel_readw(shim_vs, SDW_SHIM2_INTEL_VS_WAKESTS);
+
+ return wake_sts & SDW_SHIM2_INTEL_VS_WAKEEN_PWS;
+}
+
+static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+ void __iomem *shim_vs = sdw->link_res->shim_vs;
+ u16 wake_en;
+ u16 wake_sts;
+
+ wake_en = intel_readw(shim_vs, SDW_SHIM2_INTEL_VS_WAKEEN);
+
+ if (wake_enable) {
+ /* Enable the wakeup */
+ wake_en |= SDW_SHIM2_INTEL_VS_WAKEEN_PWE;
+ intel_writew(shim_vs, SDW_SHIM2_INTEL_VS_WAKEEN, wake_en);
+ } else {
+ /* Disable the wake up interrupt */
+ wake_en &= ~SDW_SHIM2_INTEL_VS_WAKEEN_PWE;
+ intel_writew(shim_vs, SDW_SHIM2_INTEL_VS_WAKEEN, wake_en);
+
+ /* Clear wake status (W1C) */
+ wake_sts = intel_readw(shim_vs, SDW_SHIM2_INTEL_VS_WAKESTS);
+ wake_sts |= SDW_SHIM2_INTEL_VS_WAKEEN_PWS;
+ intel_writew(shim_vs, SDW_SHIM2_INTEL_VS_WAKESTS, wake_sts);
+ }
+}
+
static int intel_link_power_up(struct sdw_intel *sdw)
{
struct sdw_bus *bus = &sdw->cdns.bus;
@@ -325,6 +360,9 @@ const struct sdw_intel_hw_ops sdw_intel_lnl_hw_ops = {
.link_power_up = intel_link_power_up,
.link_power_down = intel_link_power_down,

+ .shim_check_wake = intel_shim_check_wake,
+ .shim_wake = intel_shim_wake,
+
.sync_arm = intel_sync_arm,
.sync_go_unlocked = intel_sync_go_unlocked,
.sync_go = intel_sync_go,
--
2.25.1