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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2020-09-08 16:45:20 +0300
committerVinod Koul <vkoul@kernel.org>2020-09-10 08:51:05 +0300
commita350aff45b4d33355cdc59b7b76950e39639e32f (patch)
tree0a3f74f5f8c713fbdf2265d079092219c105fd80 /drivers/soundwire
parent38edbfae6c7f4ad402dd0464c1887eaf068468b8 (diff)
downloadlinux-a350aff45b4d33355cdc59b7b76950e39639e32f.tar.xz
soundwire: bus: export broadcast read/write capability for tests
Provide prototype and export symbol to enable tests. The bus lock is handled externally to avoid conflicts e.g. between kernel-generated traffic and test traffic. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Link: https://lore.kernel.org/r/20200908134521.6781-7-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/bus.c56
-rw-r--r--drivers/soundwire/bus.h4
2 files changed, 53 insertions, 7 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 09185e5cfd70..02574b4bb179 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -255,6 +255,21 @@ static int sdw_reset_page(struct sdw_bus *bus, u16 dev_num)
return ret;
}
+static int sdw_transfer_unlocked(struct sdw_bus *bus, struct sdw_msg *msg)
+{
+ int ret;
+
+ ret = do_transfer(bus, msg);
+ if (ret != 0 && ret != -ENODATA)
+ dev_err(bus->dev, "trf on Slave %d failed:%d\n",
+ msg->dev_num, ret);
+
+ if (msg->page)
+ sdw_reset_page(bus, msg->dev_num);
+
+ return ret;
+}
+
/**
* sdw_transfer() - Synchronous transfer message to a SDW Slave device
* @bus: SDW bus
@@ -266,13 +281,7 @@ int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg)
mutex_lock(&bus->msg_lock);
- ret = do_transfer(bus, msg);
- if (ret != 0 && ret != -ENODATA)
- dev_err(bus->dev, "trf on Slave %d failed:%d\n",
- msg->dev_num, ret);
-
- if (msg->page)
- sdw_reset_page(bus, msg->dev_num);
+ ret = sdw_transfer_unlocked(bus, msg);
mutex_unlock(&bus->msg_lock);
@@ -428,6 +437,39 @@ sdw_bwrite_no_pm(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value)
return sdw_transfer(bus, &msg);
}
+int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr)
+{
+ struct sdw_msg msg;
+ u8 buf;
+ int ret;
+
+ ret = sdw_fill_msg(&msg, NULL, addr, 1, dev_num,
+ SDW_MSG_FLAG_READ, &buf);
+ if (ret)
+ return ret;
+
+ ret = sdw_transfer_unlocked(bus, &msg);
+ if (ret < 0)
+ return ret;
+
+ return buf;
+}
+EXPORT_SYMBOL(sdw_bread_no_pm_unlocked);
+
+int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value)
+{
+ struct sdw_msg msg;
+ int ret;
+
+ ret = sdw_fill_msg(&msg, NULL, addr, 1, dev_num,
+ SDW_MSG_FLAG_WRITE, &value);
+ if (ret)
+ return ret;
+
+ return sdw_transfer_unlocked(bus, &msg);
+}
+EXPORT_SYMBOL(sdw_bwrite_no_pm_unlocked);
+
static int
sdw_read_no_pm(struct sdw_slave *slave, u32 addr)
{
diff --git a/drivers/soundwire/bus.h b/drivers/soundwire/bus.h
index 82484f741168..c53345fbc4c7 100644
--- a/drivers/soundwire/bus.h
+++ b/drivers/soundwire/bus.h
@@ -168,6 +168,10 @@ sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
return sdw_write(slave, addr, tmp);
}
+/* broadcast read/write for tests */
+int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
+int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
+
/*
* At the moment we only track Master-initiated hw_reset.
* Additional fields can be added as needed