From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Now that the bus start/stop/clock_stop sequences use the ops, we can
move them to a different file to reuse them.
Note that we could in theory remove the abstraction for all those
sequences and directly call the functions in intel_auxdevice.c. To
allow for more flexibility and have means to special-case new
platforms, we decided to keep the abstraction. If in time it becomes
clear there is no benefit the abstraction will be simplified.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
drivers/soundwire/Makefile | 3 +-
drivers/soundwire/intel.c | 199 -------------------------
drivers/soundwire/intel.h | 7 +
drivers/soundwire/intel_bus_common.c | 210 +++++++++++++++++++++++++++
4 files changed, 219 insertions(+), 200 deletions(-)
create mode 100644 drivers/soundwire/intel_bus_common.c
diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
index ca97414ada70..8038e840ac5b 100644
--- a/drivers/soundwire/Makefile
+++ b/drivers/soundwire/Makefile
@@ -20,7 +20,8 @@ soundwire-cadence-y := cadence_master.o
obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
#Intel driver
-soundwire-intel-y := intel.o intel_auxdevice.o intel_init.o dmi-quirks.o
+soundwire-intel-y := intel.o intel_auxdevice.o intel_init.o dmi-quirks.o \
+ intel_bus_common.o
obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o
#Qualcomm driver
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 8395a20e5739..77d698908595 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1122,205 +1122,6 @@ static int intel_register_dai(struct sdw_intel *sdw)
dais, num_dai);
}
-static int intel_start_bus(struct sdw_intel *sdw)
-{
- struct device *dev = sdw->cdns.dev;
- struct sdw_cdns *cdns = &sdw->cdns;
- struct sdw_bus *bus = &cdns->bus;
- int ret;
-
- ret = sdw_cdns_enable_interrupt(cdns, true);
- if (ret < 0) {
- dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
- return ret;
- }
-
- /*
- * follow recommended programming flows to avoid timeouts when
- * gsync is enabled
- */
- if (bus->multi_link)
- sdw_intel_sync_arm(sdw);
-
- ret = sdw_cdns_init(cdns);
- if (ret < 0) {
- dev_err(dev, "%s: unable to initialize Cadence IP: %d\n", __func__, ret);
- goto err_interrupt;
- }
-
- ret = sdw_cdns_exit_reset(cdns);
- if (ret < 0) {
- dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret);
- goto err_interrupt;
- }
-
- if (bus->multi_link) {
- ret = sdw_intel_sync_go(sdw);
- if (ret < 0) {
- dev_err(dev, "%s: sync go failed: %d\n", __func__, ret);
- goto err_interrupt;
- }
- }
- sdw_cdns_check_self_clearing_bits(cdns, __func__,
- true, INTEL_MASTER_RESET_ITERATIONS);
-
- return 0;
-
-err_interrupt:
- sdw_cdns_enable_interrupt(cdns, false);
- return ret;
-}
-
-static int intel_start_bus_after_reset(struct sdw_intel *sdw)
-{
- struct device *dev = sdw->cdns.dev;
- struct sdw_cdns *cdns = &sdw->cdns;
- struct sdw_bus *bus = &cdns->bus;
- bool clock_stop0;
- int status;
- int ret;
-
- /*
- * An exception condition occurs for the CLK_STOP_BUS_RESET
- * case if one or more masters remain active. In this condition,
- * all the masters are powered on for they are in the same power
- * domain. Master can preserve its context for clock stop0, so
- * there is no need to clear slave status and reset bus.
- */
- clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
-
- if (!clock_stop0) {
-
- /*
- * make sure all Slaves are tagged as UNATTACHED and
- * provide reason for reinitialization
- */
-
- status = SDW_UNATTACH_REQUEST_MASTER_RESET;
- sdw_clear_slave_status(bus, status);
-
- ret = sdw_cdns_enable_interrupt(cdns, true);
- if (ret < 0) {
- dev_err(dev, "cannot enable interrupts during resume\n");
- return ret;
- }
-
- /*
- * follow recommended programming flows to avoid
- * timeouts when gsync is enabled
- */
- if (bus->multi_link)
- sdw_intel_sync_arm(sdw);
-
- /*
- * Re-initialize the IP since it was powered-off
- */
- sdw_cdns_init(&sdw->cdns);
-
- } else {
- ret = sdw_cdns_enable_interrupt(cdns, true);
- if (ret < 0) {
- dev_err(dev, "cannot enable interrupts during resume\n");
- return ret;
- }
- }
-
- ret = sdw_cdns_clock_restart(cdns, !clock_stop0);
- if (ret < 0) {
- dev_err(dev, "unable to restart clock during resume\n");
- goto err_interrupt;
- }
-
- if (!clock_stop0) {
- ret = sdw_cdns_exit_reset(cdns);
- if (ret < 0) {
- dev_err(dev, "unable to exit bus reset sequence during resume\n");
- goto err_interrupt;
- }
-
- if (bus->multi_link) {
- ret = sdw_intel_sync_go(sdw);
- if (ret < 0) {
- dev_err(sdw->cdns.dev, "sync go failed during resume\n");
- goto err_interrupt;
- }
- }
- }
- sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS);
-
- return 0;
-
-err_interrupt:
- sdw_cdns_enable_interrupt(cdns, false);
- return ret;
-}
-
-static void intel_check_clock_stop(struct sdw_intel *sdw)
-{
- struct device *dev = sdw->cdns.dev;
- bool clock_stop0;
-
- clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
- if (!clock_stop0)
- dev_err(dev, "%s: invalid configuration, clock was not stopped\n", __func__);
-}
-
-static int intel_start_bus_after_clock_stop(struct sdw_intel *sdw)
-{
- struct device *dev = sdw->cdns.dev;
- struct sdw_cdns *cdns = &sdw->cdns;
- int ret;
-
- ret = sdw_cdns_enable_interrupt(cdns, true);
- if (ret < 0) {
- dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
- return ret;
- }
-
- ret = sdw_cdns_clock_restart(cdns, false);
- if (ret < 0) {
- dev_err(dev, "%s: unable to restart clock: %d\n", __func__, ret);
- sdw_cdns_enable_interrupt(cdns, false);
- return ret;
- }
-
- sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime no_quirks",
- true, INTEL_MASTER_RESET_ITERATIONS);
-
- return 0;
-}
-
-static int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
-{
- struct device *dev = sdw->cdns.dev;
- struct sdw_cdns *cdns = &sdw->cdns;
- bool wake_enable = false;
- int ret;
-
- if (clock_stop) {
- ret = sdw_cdns_clock_stop(cdns, true);
- if (ret < 0)
- dev_err(dev, "%s: cannot stop clock: %d\n", __func__, ret);
- else
- wake_enable = true;
- }
-
- ret = sdw_cdns_enable_interrupt(cdns, false);
- if (ret < 0) {
- dev_err(dev, "%s: cannot disable interrupts: %d\n", __func__, ret);
- return ret;
- }
-
- ret = sdw_intel_link_power_down(sdw);
- if (ret) {
- dev_err(dev, "%s: Link power down failed: %d\n", __func__, ret);
- return ret;
- }
-
- sdw_intel_shim_wake(sdw, wake_enable);
-
- return 0;
-}
const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
.debugfs_init = intel_debugfs_init,
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 28b21a92e28b..abd1a500defa 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -187,4 +187,11 @@ static inline int sdw_intel_sync_go(struct sdw_intel *sdw)
return -ENOTSUPP;
}
+/* common bus management */
+int intel_start_bus(struct sdw_intel *sdw);
+int intel_start_bus_after_reset(struct sdw_intel *sdw);
+void intel_check_clock_stop(struct sdw_intel *sdw);
+int intel_start_bus_after_clock_stop(struct sdw_intel *sdw);
+int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop);
+
#endif /* __SDW_INTEL_LOCAL_H */
diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c
new file mode 100644
index 000000000000..9a06ab58018b
--- /dev/null
+++ b/drivers/soundwire/intel_bus_common.c
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+// Copyright(c) 2015-2023 Intel Corporation. All rights reserved.
+
+#include <linux/acpi.h>
+#include <linux/soundwire/sdw_registers.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_intel.h>
+#include "cadence_master.h"
+#include "bus.h"
+#include "intel.h"
+
+int intel_start_bus(struct sdw_intel *sdw)
+{
+ struct device *dev = sdw->cdns.dev;
+ struct sdw_cdns *cdns = &sdw->cdns;
+ struct sdw_bus *bus = &cdns->bus;
+ int ret;
+
+ ret = sdw_cdns_enable_interrupt(cdns, true);
+ if (ret < 0) {
+ dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
+ return ret;
+ }
+
+ /*
+ * follow recommended programming flows to avoid timeouts when
+ * gsync is enabled
+ */
+ if (bus->multi_link)
+ sdw_intel_sync_arm(sdw);
+
+ ret = sdw_cdns_init(cdns);
+ if (ret < 0) {
+ dev_err(dev, "%s: unable to initialize Cadence IP: %d\n", __func__, ret);
+ goto err_interrupt;
+ }
+
+ ret = sdw_cdns_exit_reset(cdns);
+ if (ret < 0) {
+ dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret);
+ goto err_interrupt;
+ }
+
+ if (bus->multi_link) {
+ ret = sdw_intel_sync_go(sdw);
+ if (ret < 0) {
+ dev_err(dev, "%s: sync go failed: %d\n", __func__, ret);
+ goto err_interrupt;
+ }
+ }
+ sdw_cdns_check_self_clearing_bits(cdns, __func__,
+ true, INTEL_MASTER_RESET_ITERATIONS);
+
+ return 0;
+
+err_interrupt:
+ sdw_cdns_enable_interrupt(cdns, false);
+ return ret;
+}
+
+int intel_start_bus_after_reset(struct sdw_intel *sdw)
+{
+ struct device *dev = sdw->cdns.dev;
+ struct sdw_cdns *cdns = &sdw->cdns;
+ struct sdw_bus *bus = &cdns->bus;
+ bool clock_stop0;
+ int status;
+ int ret;
+
+ /*
+ * An exception condition occurs for the CLK_STOP_BUS_RESET
+ * case if one or more masters remain active. In this condition,
+ * all the masters are powered on for they are in the same power
+ * domain. Master can preserve its context for clock stop0, so
+ * there is no need to clear slave status and reset bus.
+ */
+ clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
+
+ if (!clock_stop0) {
+
+ /*
+ * make sure all Slaves are tagged as UNATTACHED and
+ * provide reason for reinitialization
+ */
+
+ status = SDW_UNATTACH_REQUEST_MASTER_RESET;
+ sdw_clear_slave_status(bus, status);
+
+ ret = sdw_cdns_enable_interrupt(cdns, true);
+ if (ret < 0) {
+ dev_err(dev, "cannot enable interrupts during resume\n");
+ return ret;
+ }
+
+ /*
+ * follow recommended programming flows to avoid
+ * timeouts when gsync is enabled
+ */
+ if (bus->multi_link)
+ sdw_intel_sync_arm(sdw);
+
+ /*
+ * Re-initialize the IP since it was powered-off
+ */
+ sdw_cdns_init(&sdw->cdns);
+
+ } else {
+ ret = sdw_cdns_enable_interrupt(cdns, true);
+ if (ret < 0) {
+ dev_err(dev, "cannot enable interrupts during resume\n");
+ return ret;
+ }
+ }
+
+ ret = sdw_cdns_clock_restart(cdns, !clock_stop0);
+ if (ret < 0) {
+ dev_err(dev, "unable to restart clock during resume\n");
+ goto err_interrupt;
+ }
+
+ if (!clock_stop0) {
+ ret = sdw_cdns_exit_reset(cdns);
+ if (ret < 0) {
+ dev_err(dev, "unable to exit bus reset sequence during resume\n");
+ goto err_interrupt;
+ }
+
+ if (bus->multi_link) {
+ ret = sdw_intel_sync_go(sdw);
+ if (ret < 0) {
+ dev_err(sdw->cdns.dev, "sync go failed during resume\n");
+ goto err_interrupt;
+ }
+ }
+ }
+ sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS);
+
+ return 0;
+
+err_interrupt:
+ sdw_cdns_enable_interrupt(cdns, false);
+ return ret;
+}
+
+void intel_check_clock_stop(struct sdw_intel *sdw)
+{
+ struct device *dev = sdw->cdns.dev;
+ bool clock_stop0;
+
+ clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
+ if (!clock_stop0)
+ dev_err(dev, "%s: invalid configuration, clock was not stopped\n", __func__);
+}
+
+int intel_start_bus_after_clock_stop(struct sdw_intel *sdw)
+{
+ struct device *dev = sdw->cdns.dev;
+ struct sdw_cdns *cdns = &sdw->cdns;
+ int ret;
+
+ ret = sdw_cdns_enable_interrupt(cdns, true);
+ if (ret < 0) {
+ dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = sdw_cdns_clock_restart(cdns, false);
+ if (ret < 0) {
+ dev_err(dev, "%s: unable to restart clock: %d\n", __func__, ret);
+ sdw_cdns_enable_interrupt(cdns, false);
+ return ret;
+ }
+
+ sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime no_quirks",
+ true, INTEL_MASTER_RESET_ITERATIONS);
+
+ return 0;
+}
+
+int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
+{
+ struct device *dev = sdw->cdns.dev;
+ struct sdw_cdns *cdns = &sdw->cdns;
+ bool wake_enable = false;
+ int ret;
+
+ if (clock_stop) {
+ ret = sdw_cdns_clock_stop(cdns, true);
+ if (ret < 0)
+ dev_err(dev, "%s: cannot stop clock: %d\n", __func__, ret);
+ else
+ wake_enable = true;
+ }
+
+ ret = sdw_cdns_enable_interrupt(cdns, false);
+ if (ret < 0) {
+ dev_err(dev, "%s: cannot disable interrupts: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = sdw_intel_link_power_down(sdw);
+ if (ret) {
+ dev_err(dev, "%s: Link power down failed: %d\n", __func__, ret);
+ return ret;
+ }
+
+ sdw_intel_shim_wake(sdw, wake_enable);
+
+ return 0;
+}
--
2.25.1
