From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org,
vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com,
srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com,
Bard liao <yung-chuan.liao@linux.intel.com>,
Rander Wang <rander.wang@linux.intel.com>,
Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>
Subject: [PATCH v4 08/15] soundwire: add initial definitions for sdw_master_device
Date: Thu, 12 Dec 2019 23:04:02 -0600 [thread overview]
Message-ID: <20191213050409.12776-9-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191213050409.12776-1-pierre-louis.bossart@linux.intel.com>
Since we want an explicit support for the SoundWire Master device, add
the definitions, following the Grey Bus example.
Unlike for the Slave device, we do not set a variable when dealing
with the master uevent.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/Makefile | 2 +-
drivers/soundwire/bus_type.c | 7 +++-
drivers/soundwire/master.c | 62 ++++++++++++++++++++++++++++++
include/linux/soundwire/sdw.h | 35 +++++++++++++++++
include/linux/soundwire/sdw_type.h | 9 +++++
5 files changed, 112 insertions(+), 3 deletions(-)
create mode 100644 drivers/soundwire/master.c
diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
index 563894e5ecaf..89b29819dd3a 100644
--- a/drivers/soundwire/Makefile
+++ b/drivers/soundwire/Makefile
@@ -4,7 +4,7 @@
#
#Bus Objs
-soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
+soundwire-bus-objs := bus_type.o bus.o master.o slave.o mipi_disco.o stream.o
obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
ifdef CONFIG_DEBUG_FS
diff --git a/drivers/soundwire/bus_type.c b/drivers/soundwire/bus_type.c
index 5c18c21545b5..df1271f6db61 100644
--- a/drivers/soundwire/bus_type.c
+++ b/drivers/soundwire/bus_type.c
@@ -59,9 +59,12 @@ int sdw_uevent(struct device *dev, struct kobj_uevent_env *env)
if (add_uevent_var(env, "MODALIAS=%s", modalias))
return -ENOMEM;
+ } else if (is_sdw_md(dev)) {
+ /* this should not happen but throw an error */
+ dev_warn(dev, "uevent for Master device, unsupported\n");
+ return -EINVAL;
} else {
- /* only Slave device type supported */
- dev_warn(dev, "uevent for unknown Soundwire type\n");
+ dev_warn(dev, "uevent for unknown device\n");
return -EINVAL;
}
diff --git a/drivers/soundwire/master.c b/drivers/soundwire/master.c
new file mode 100644
index 000000000000..6210098c892b
--- /dev/null
+++ b/drivers/soundwire/master.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+// Copyright(c) 2019 Intel Corporation.
+
+#include <linux/device.h>
+#include <linux/acpi.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_type.h>
+#include "bus.h"
+
+static void sdw_md_release(struct device *dev)
+{
+ struct sdw_master_device *md = to_sdw_master_device(dev);
+
+ kfree(md);
+}
+
+struct device_type sdw_md_type = {
+ .name = "soundwire_master",
+ .release = sdw_md_release,
+};
+
+struct sdw_master_device *sdw_md_add(struct sdw_md_driver *driver,
+ struct device *parent,
+ struct fwnode_handle *fwnode,
+ int link_id)
+{
+ struct sdw_master_device *md;
+ int ret;
+
+ if (!driver->probe) {
+ dev_err(parent, "mandatory probe callback missing\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ md = kzalloc(sizeof(*md), GFP_KERNEL);
+ if (!md)
+ return ERR_PTR(-ENOMEM);
+
+ md->link_id = link_id;
+
+ md->driver = driver;
+
+ md->dev.parent = parent;
+ md->dev.fwnode = fwnode;
+ md->dev.bus = &sdw_bus_type;
+ md->dev.type = &sdw_md_type;
+ md->dev.dma_mask = md->dev.parent->dma_mask;
+ dev_set_name(&md->dev, "sdw-master-%d", md->link_id);
+
+ ret = device_register(&md->dev);
+ if (ret) {
+ dev_err(parent, "Failed to add master: ret %d\n", ret);
+ /*
+ * On err, don't free but drop ref as this will be freed
+ * when release method is invoked.
+ */
+ put_device(&md->dev);
+ }
+
+ return md;
+}
+EXPORT_SYMBOL(sdw_md_add);
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 5b1180f1e6b5..af0a72e7afdf 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -585,6 +585,16 @@ struct sdw_slave {
#define to_sdw_slave_device(d) \
container_of(d, struct sdw_slave, dev)
+struct sdw_master_device {
+ struct device dev;
+ int link_id;
+ struct sdw_md_driver *driver;
+ void *pdata; /* core does not touch */
+};
+
+#define to_sdw_master_device(d) \
+ container_of(d, struct sdw_master_device, dev)
+
struct sdw_driver {
const char *name;
@@ -599,6 +609,26 @@ struct sdw_driver {
struct device_driver driver;
};
+struct sdw_md_driver {
+ /* initializations and allocations */
+ int (*probe)(struct sdw_master_device *md, void *link_ctx);
+ /* hardware enablement, all clock/power dependencies are available */
+ int (*startup)(struct sdw_master_device *md);
+ /* hardware disabled */
+ int (*shutdown)(struct sdw_master_device *md);
+ /* free all resources */
+ int (*remove)(struct sdw_master_device *md);
+ /*
+ * enable/disable driver control while in clock-stop mode,
+ * typically in always-on/D0ix modes. When the driver yields
+ * control, another entity in the system (typically firmware
+ * running on an always-on microprocessor) is responsible to
+ * tracking Slave-initiated wakes
+ */
+ int (*autonomous_clock_stop_enable)(struct sdw_master_device *md,
+ bool state);
+};
+
#define SDW_SLAVE_ENTRY(_mfg_id, _part_id, _drv_data) \
{ .mfg_id = (_mfg_id), .part_id = (_part_id), \
.driver_data = (unsigned long)(_drv_data) }
@@ -788,6 +818,11 @@ struct sdw_bus {
int sdw_add_bus_master(struct sdw_bus *bus);
void sdw_delete_bus_master(struct sdw_bus *bus);
+struct sdw_master_device *sdw_md_add(struct sdw_md_driver *driver,
+ struct device *parent,
+ struct fwnode_handle *fwnode,
+ int link_id);
+
/**
* sdw_port_config: Master or Slave Port configuration
*
diff --git a/include/linux/soundwire/sdw_type.h b/include/linux/soundwire/sdw_type.h
index c681b3426478..463d6d018d56 100644
--- a/include/linux/soundwire/sdw_type.h
+++ b/include/linux/soundwire/sdw_type.h
@@ -6,15 +6,24 @@
extern struct bus_type sdw_bus_type;
extern struct device_type sdw_slave_type;
+extern struct device_type sdw_md_type;
static inline int is_sdw_slave(const struct device *dev)
{
return dev->type == &sdw_slave_type;
}
+static inline int is_sdw_md(const struct device *dev)
+{
+ return dev->type == &sdw_md_type;
+}
+
#define to_sdw_slave_driver(_drv) \
container_of(_drv, struct sdw_driver, driver)
+#define to_sdw_md_driver(_drv) \
+ container_of(_drv, struct sdw_md_driver, driver)
+
#define sdw_register_slave_driver(drv) \
__sdw_register_slave_driver(drv, THIS_MODULE)
--
2.20.1
next prev parent reply other threads:[~2019-12-13 5:04 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-13 5:03 [PATCH v4 00/15] soundwire: intel: implement new ASoC interfaces Pierre-Louis Bossart
2019-12-13 5:03 ` [PATCH v4 01/15] soundwire: renames to prepare support for master drivers/devices Pierre-Louis Bossart
2019-12-13 5:03 ` [PATCH v4 02/15] soundwire: rename dev_to_sdw_dev macro Pierre-Louis Bossart
2019-12-13 5:03 ` [PATCH v4 03/15] soundwire: rename drv_to_sdw_slave_driver macro Pierre-Louis Bossart
2019-12-13 5:03 ` [PATCH v4 04/15] soundwire: bus_type: rename sdw_drv_ to sdw_slave_drv Pierre-Louis Bossart
2019-12-13 5:03 ` [PATCH v4 05/15] soundwire: intel: rename res field as link_res Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 06/15] soundwire: add support for sdw_slave_type Pierre-Louis Bossart
2019-12-13 7:21 ` Greg KH
2019-12-13 15:05 ` [alsa-devel] " Pierre-Louis Bossart
2019-12-13 16:12 ` Greg KH
2019-12-13 22:14 ` Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 07/15] soundwire: slave: move uevent handling to slave Pierre-Louis Bossart
2019-12-13 7:22 ` Greg KH
2019-12-13 15:11 ` [alsa-devel] " Pierre-Louis Bossart
2019-12-13 16:11 ` Greg KH
2019-12-13 22:15 ` Pierre-Louis Bossart
2019-12-13 5:04 ` Pierre-Louis Bossart [this message]
2019-12-13 7:28 ` [PATCH v4 08/15] soundwire: add initial definitions for sdw_master_device Greg KH
2019-12-13 15:49 ` Pierre-Louis Bossart
2019-12-13 16:10 ` Greg KH
2019-12-13 22:15 ` [alsa-devel] " Pierre-Louis Bossart
2019-12-16 22:34 ` Pierre-Louis Bossart
2019-12-13 23:25 ` Pierre-Louis Bossart
2019-12-14 8:27 ` Greg KH
2019-12-16 15:02 ` Pierre-Louis Bossart
2019-12-16 16:25 ` Greg KH
2019-12-16 17:07 ` Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 09/15] soundwire: intel: remove platform devices and provide new interface Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 10/15] soundwire: register master device driver Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 11/15] soundwire: intel: add prepare support in sdw dai driver Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 12/15] soundwire: intel: add trigger " Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 13/15] soundwire: intel: add sdw_stream_setup helper for .startup callback Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 14/15] soundwire: intel: free all resources on hw_free() Pierre-Louis Bossart
2019-12-13 5:04 ` [PATCH v4 15/15] soundwire: intel_init: add implementation of sdw_intel_enable_irq() Pierre-Louis Bossart
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