From: Markus Lidel <Markus.Lidel@shadowconnect.com>
- Added Bus-OSM which could be used by user space programs to reset a
channel on the controller
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
drivers/message/i2o/bus-osm.c | 164 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 164 insertions(+)
diff -puN /dev/null drivers/message/i2o/bus-osm.c
--- /dev/null Thu Apr 11 07:25:15 2002
+++ 25-akpm/drivers/message/i2o/bus-osm.c Mon May 16 14:59:04 2005
@@ -0,0 +1,164 @@
+/*
+ * Bus Adapter OSM
+ *
+ * Copyright (C) 2005 Markus Lidel <Markus.Lidel@shadowconnect.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Fixes/additions:
+ * Markus Lidel <Markus.Lidel@shadowconnect.com>
+ * initial version.
+ */
+
+#include <linux/module.h>
+#include <linux/i2o.h>
+
+#define OSM_NAME "bus-osm"
+#define OSM_VERSION "$Rev$"
+#define OSM_DESCRIPTION "I2O Bus Adapter OSM"
+
+static struct i2o_driver i2o_bus_driver;
+
+/* Bus OSM class handling definition */
+static struct i2o_class_id i2o_bus_class_id[] = {
+ {I2O_CLASS_BUS_ADAPTER},
+ {I2O_CLASS_END}
+};
+
+/**
+ * i2o_bus_scan - Scan the bus for new devices
+ * @dev: I2O device of the bus, which should be scanned
+ *
+ * Scans the bus dev for new / removed devices. After the scan a new LCT
+ * will be fetched automatically.
+ *
+ * Returns 0 on success or negative error code on failure.
+ */
+static int i2o_bus_scan(struct i2o_device *dev)
+{
+ struct i2o_message __iomem *msg;
+ u32 m;
+
+ m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
+ if (m == I2O_QUEUE_EMPTY)
+ return -ETIMEDOUT;
+
+ writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
+ writel(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.tid,
+ &msg->u.head[1]);
+
+ return i2o_msg_post_wait(dev->iop, m, 60);
+};
+
+/**
+ * i2o_bus_store_scan - Scan the I2O Bus Adapter
+ * @d: device which should be scanned
+ *
+ * Returns count.
+ */
+static ssize_t i2o_bus_store_scan(struct device *d, const char *buf,
+ size_t count)
+{
+ struct i2o_device *i2o_dev = to_i2o_device(d);
+ int rc;
+
+ if ((rc = i2o_bus_scan(i2o_dev)))
+ osm_warn("bus scan failed %d\n", rc);
+
+ return count;
+}
+
+/* Bus Adapter OSM device attributes */
+static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan);
+
+/**
+ * i2o_bus_probe - verify if dev is a I2O Bus Adapter device and install it
+ * @dev: device to verify if it is a I2O Bus Adapter device
+ *
+ * Because we want all Bus Adapters always return 0.
+ *
+ * Returns 0.
+ */
+static int i2o_bus_probe(struct device *dev)
+{
+ struct i2o_device *i2o_dev = to_i2o_device(get_device(dev));
+
+ device_create_file(dev, &dev_attr_scan);
+
+ osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid);
+
+ return 0;
+};
+
+/**
+ * i2o_bus_remove - remove the I2O Bus Adapter device from the system again
+ * @dev: I2O Bus Adapter device which should be removed
+ *
+ * Always returns 0.
+ */
+static int i2o_bus_remove(struct device *dev)
+{
+ struct i2o_device *i2o_dev = to_i2o_device(dev);
+
+ device_remove_file(dev, &dev_attr_scan);
+
+ put_device(dev);
+
+ osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
+
+ return 0;
+};
+
+/* Bus Adapter OSM driver struct */
+static struct i2o_driver i2o_bus_driver = {
+ .name = OSM_NAME,
+ .classes = i2o_bus_class_id,
+ .driver = {
+ .probe = i2o_bus_probe,
+ .remove = i2o_bus_remove,
+ },
+};
+
+/**
+ * i2o_bus_init - Bus Adapter OSM initialization function
+ *
+ * Only register the Bus Adapter OSM in the I2O core.
+ *
+ * Returns 0 on success or negative error code on failure.
+ */
+static int __init i2o_bus_init(void)
+{
+ int rc;
+
+ printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
+
+ /* Register Bus Adapter OSM into I2O core */
+ rc = i2o_driver_register(&i2o_bus_driver);
+ if (rc) {
+ osm_err("Could not register Bus Adapter OSM\n");
+ return rc;
+ }
+
+ return 0;
+};
+
+/**
+ * i2o_bus_exit - Bus Adapter OSM exit function
+ *
+ * Unregisters Bus Adapter OSM from I2O core.
+ */
+static void __exit i2o_bus_exit(void)
+{
+ i2o_driver_unregister(&i2o_bus_driver);
+};
+
+MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(OSM_DESCRIPTION);
+MODULE_VERSION(OSM_VERSION);
+
+module_init(i2o_bus_init);
+module_exit(i2o_bus_exit);
_