This patch creates a new sysfs entry to query the driver
state without making any bridge direct call, this is
useful to monitor driver state without creating any handle
to bridge driver.
Signed-off-by: Omar Ramirez Luna <omar.ramirez@xxxxxx>
---
drivers/dsp/bridge/rmgr/drv_interface.c | 87 +++++++++++++++++++++++++++++++
1 files changed, 87 insertions(+), 0 deletions(-)
diff --git a/drivers/dsp/bridge/rmgr/drv_interface.c b/drivers/dsp/bridge/rmgr/drv_interface.c
index c853854..3a4d058 100644
--- a/drivers/dsp/bridge/rmgr/drv_interface.c
+++ b/drivers/dsp/bridge/rmgr/drv_interface.c
@@ -58,11 +58,13 @@
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/cdev.h>
+#include <linux/kobject.h>
/* ----------------------------------- DSP/BIOS Bridge */
#include <dspbridge/std.h>
#include <dspbridge/dbdefs.h>
#include <dspbridge/errbase.h>
+#include <_tiomap.h>
/* ----------------------------------- Trace & Debug */
#include <dspbridge/gt.h>
@@ -148,6 +150,10 @@ static int omap34xxbridge_suspend_lockout(
}
#endif
+/* Sysfs interface */
+static void bridge_create_sysfs(struct platform_device *pdev);
+static void bridge_destroy_sysfs(struct platform_device *pdev);
+
#ifdef DEBUG
module_param(GT_str, charp, 0);
MODULE_PARM_DESC(GT_str, "GT string, default = NULL");
@@ -297,6 +303,9 @@ static int __devinit omap34xx_bridge_probe(struct platform_device *pdev)
device_create(bridge_class, NULL, MKDEV(driver_major, driver_minor),
NULL, "DspBridge");
+ /* Create sysfs interface */
+ bridge_create_sysfs(pdev);
+
GT_init();
GT_create(&driverTrace, "LD");
@@ -454,6 +463,9 @@ func_cont:
SERVICES_Exit();
GT_exit();
+ /* Remove driver sysfs entries */
+ bridge_destroy_sysfs(pdev);
+
devno = MKDEV(driver_major, driver_minor);
if (bridge_device) {
cdev_del(&bridge_device->cdev);
@@ -677,6 +689,81 @@ DSP_STATUS DRV_RemoveAllResources(HANDLE hPCtxt)
}
#endif
+/*
+ * Sysfs
+ */
+static ssize_t drv_state_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct WMD_DEV_CONTEXT *dev_ctxt;
+ struct DEV_OBJECT *dev_obj = NULL;
+ char *drv_state = "unknown";
+
+ dev_obj = (struct DEV_OBJECT *)DRV_GetFirstDevObject();
+ DEV_GetWMDContext(dev_obj, &dev_ctxt);
+
+ if (!dev_ctxt)
+ goto err;
+
+ switch (dev_ctxt->dwBrdState) {
+ case BRD_STOPPED:
+ drv_state = "stopped";
+ break;
+ case BRD_IDLE:
+ drv_state = "idle";
+ break;
+ case BRD_RUNNING:
+ drv_state = "running";
+ break;
+ case BRD_LOADED:
+ drv_state = "loaded";
+ break;
+ case BRD_SLEEP_TRANSITION:
+ drv_state = "sleep transition";
+ break;
+ case BRD_HIBERNATION:
+ drv_state = "hibernation";
+ break;
+ case BRD_RETENTION:
+ drv_state = "retention";
+ break;
+ case BRD_DSP_HIBERNATION:
+ drv_state = "self initiated hibernation";
+ break;
+ case BRD_ERROR:
+ drv_state = "error";
+ break;
+ }
+
+err:
+ return sprintf(buf, "%s\n", drv_state);
+}
+static DEVICE_ATTR(drv_state, S_IRUGO, drv_state_show, NULL);
+
+static struct attribute *attrs[] = {
+ &dev_attr_drv_state.attr,
+ NULL,
+};
+
+static struct attribute_group attr_group = {
+ .attrs = attrs,
+};
+
+static void bridge_create_sysfs(struct platform_device *pdev)
+{
+ int error;
+
+ error = sysfs_create_group(&pdev->dev.kobj, &attr_group);
+
+ if (error)
+ kobject_put(&pdev->dev.kobj);
+}
+
+static void bridge_destroy_sysfs(struct platform_device *pdev)
+{
+ sysfs_remove_group(&pdev->dev.kobj, &attr_group);
+}
+
/* Bridge driver initialization and de-initialization functions */
module_init(bridge_init);
module_exit(bridge_exit);
--
1.6.2.4
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