Initial file dump from open source releaseHEADmaster

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c
new file mode 100644
index 00000000..fe719166
--- /dev/null
+++ b/drivers/bus/omap-ocp2scp.c
@@ -0,0 +1,150 @@
+/*
+ * omap-ocp2scp.c - transform ocp interface protocol to scp protocol
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.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.
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_data/omap_ocp2scp.h>
+
+/**
+ * _count_resources - count for the number of resources
+ * @res: struct resource *
+ *
+ * Count and return the number of resources populated for the device that is
+ * connected to ocp2scp.
+ */
+static unsigned _count_resources(struct resource *res)
+{
+	int cnt	= 0;
+
+	while (res->start != res->end) {
+		cnt++;
+		res++;
+	}
+
+	return cnt;
+}
+
+static int ocp2scp_remove_devices(struct device *dev, void *c)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	platform_device_unregister(pdev);
+
+	return 0;
+}
+
+static int omap_ocp2scp_probe(struct platform_device *pdev)
+{
+	int ret;
+	unsigned res_cnt, i;
+	struct device_node *np = pdev->dev.of_node;
+	struct platform_device *pdev_child;
+	struct omap_ocp2scp_platform_data *pdata = pdev->dev.platform_data;
+	struct omap_ocp2scp_dev *dev;
+
+	if (np) {
+		ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
+		if (ret) {
+			dev_err(&pdev->dev,
+			    "failed to add resources for ocp2scp child\n");
+			goto err0;
+		}
+	} else if (pdata) {
+		for (i = 0, dev = *pdata->devices; i < pdata->dev_cnt; i++,
+		    dev++) {
+			res_cnt = _count_resources(dev->res);
+
+			pdev_child = platform_device_alloc(dev->drv_name,
+			    PLATFORM_DEVID_AUTO);
+			if (!pdev_child) {
+				dev_err(&pdev->dev,
+				  "failed to allocate mem for ocp2scp child\n");
+				goto err0;
+			}
+
+			ret = platform_device_add_resources(pdev_child,
+			    dev->res, res_cnt);
+			if (ret) {
+				dev_err(&pdev->dev,
+				 "failed to add resources for ocp2scp child\n");
+				goto err1;
+			}
+
+			pdev_child->dev.parent	= &pdev->dev;
+
+			ret = platform_device_add(pdev_child);
+			if (ret) {
+				dev_err(&pdev->dev,
+				   "failed to register ocp2scp child device\n");
+				goto err1;
+			}
+		}
+	} else {
+		dev_err(&pdev->dev, "OCP2SCP initialized without plat data\n");
+		return -EINVAL;
+	}
+
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+err1:
+	platform_device_put(pdev_child);
+
+err0:
+	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
+
+	return ret;
+}
+
+static int omap_ocp2scp_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
+
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id omap_ocp2scp_id_table[] = {
+	{ .compatible = "ti,omap-ocp2scp" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
+#endif
+
+static struct platform_driver omap_ocp2scp_driver = {
+	.probe		= omap_ocp2scp_probe,
+	.remove		= omap_ocp2scp_remove,
+	.driver		= {
+		.name	= "omap-ocp2scp",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(omap_ocp2scp_id_table),
+	},
+};
+
+module_platform_driver(omap_ocp2scp_driver);
+
+MODULE_ALIAS("platform: omap-ocp2scp");
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("OMAP OCP2SCP driver");
+MODULE_LICENSE("GPL v2");