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path: root/drivers/char/xillybus/xillybus_of.c
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Diffstat (limited to 'drivers/char/xillybus/xillybus_of.c')
-rw-r--r--drivers/char/xillybus/xillybus_of.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/char/xillybus/xillybus_of.c b/drivers/char/xillybus/xillybus_of.c
new file mode 100644
index 000000000000..1ca0c7a4f1be
--- /dev/null
+++ b/drivers/char/xillybus/xillybus_of.c
@@ -0,0 +1,187 @@
+/*
+ * linux/drivers/misc/xillybus_of.c
+ *
+ * Copyright 2011 Xillybus Ltd, http://xillybus.com
+ *
+ * Driver for the Xillybus FPGA/host framework using Open Firmware.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the smems of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/err.h>
+#include "xillybus.h"
+
+MODULE_DESCRIPTION("Xillybus driver for Open Firmware");
+MODULE_AUTHOR("Eli Billauer, Xillybus Ltd.");
+MODULE_VERSION("1.06");
+MODULE_ALIAS("xillybus_of");
+MODULE_LICENSE("GPL v2");
+
+static const char xillyname[] = "xillybus_of";
+
+/* Match table for of_platform binding */
+static struct of_device_id xillybus_of_match[] = {
+ { .compatible = "xillybus,xillybus-1.00.a", },
+ { .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */
+ {}
+};
+
+MODULE_DEVICE_TABLE(of, xillybus_of_match);
+
+static void xilly_dma_sync_single_for_cpu_of(struct xilly_endpoint *ep,
+ dma_addr_t dma_handle,
+ size_t size,
+ int direction)
+{
+ dma_sync_single_for_cpu(ep->dev, dma_handle, size, direction);
+}
+
+static void xilly_dma_sync_single_for_device_of(struct xilly_endpoint *ep,
+ dma_addr_t dma_handle,
+ size_t size,
+ int direction)
+{
+ dma_sync_single_for_device(ep->dev, dma_handle, size, direction);
+}
+
+static void xilly_dma_sync_single_nop(struct xilly_endpoint *ep,
+ dma_addr_t dma_handle,
+ size_t size,
+ int direction)
+{
+}
+
+static void xilly_of_unmap(void *ptr)
+{
+ struct xilly_mapping *data = ptr;
+
+ dma_unmap_single(data->device, data->dma_addr,
+ data->size, data->direction);
+
+ kfree(ptr);
+}
+
+static int xilly_map_single_of(struct xilly_endpoint *ep,
+ void *ptr,
+ size_t size,
+ int direction,
+ dma_addr_t *ret_dma_handle
+ )
+{
+ dma_addr_t addr;
+ struct xilly_mapping *this;
+ int rc;
+
+ this = kzalloc(sizeof(*this), GFP_KERNEL);
+ if (!this)
+ return -ENOMEM;
+
+ addr = dma_map_single(ep->dev, ptr, size, direction);
+
+ if (dma_mapping_error(ep->dev, addr)) {
+ kfree(this);
+ return -ENODEV;
+ }
+
+ this->device = ep->dev;
+ this->dma_addr = addr;
+ this->size = size;
+ this->direction = direction;
+
+ *ret_dma_handle = addr;
+
+ rc = devm_add_action(ep->dev, xilly_of_unmap, this);
+
+ if (rc) {
+ dma_unmap_single(ep->dev, addr, size, direction);
+ kfree(this);
+ return rc;
+ }
+
+ return 0;
+}
+
+static struct xilly_endpoint_hardware of_hw = {
+ .owner = THIS_MODULE,
+ .hw_sync_sgl_for_cpu = xilly_dma_sync_single_for_cpu_of,
+ .hw_sync_sgl_for_device = xilly_dma_sync_single_for_device_of,
+ .map_single = xilly_map_single_of,
+};
+
+static struct xilly_endpoint_hardware of_hw_coherent = {
+ .owner = THIS_MODULE,
+ .hw_sync_sgl_for_cpu = xilly_dma_sync_single_nop,
+ .hw_sync_sgl_for_device = xilly_dma_sync_single_nop,
+ .map_single = xilly_map_single_of,
+};
+
+static int xilly_drv_probe(struct platform_device *op)
+{
+ struct device *dev = &op->dev;
+ struct xilly_endpoint *endpoint;
+ int rc;
+ int irq;
+ struct resource res;
+ struct xilly_endpoint_hardware *ephw = &of_hw;
+
+ if (of_property_read_bool(dev->of_node, "dma-coherent"))
+ ephw = &of_hw_coherent;
+
+ endpoint = xillybus_init_endpoint(NULL, dev, ephw);
+
+ if (!endpoint)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, endpoint);
+
+ rc = of_address_to_resource(dev->of_node, 0, &res);
+ endpoint->registers = devm_ioremap_resource(dev, &res);
+
+ if (IS_ERR(endpoint->registers))
+ return PTR_ERR(endpoint->registers);
+
+ irq = irq_of_parse_and_map(dev->of_node, 0);
+
+ rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint);
+
+ if (rc) {
+ dev_err(endpoint->dev,
+ "Failed to register IRQ handler. Aborting.\n");
+ return -ENODEV;
+ }
+
+ return xillybus_endpoint_discovery(endpoint);
+}
+
+static int xilly_drv_remove(struct platform_device *op)
+{
+ struct device *dev = &op->dev;
+ struct xilly_endpoint *endpoint = dev_get_drvdata(dev);
+
+ xillybus_endpoint_remove(endpoint);
+
+ return 0;
+}
+
+static struct platform_driver xillybus_platform_driver = {
+ .probe = xilly_drv_probe,
+ .remove = xilly_drv_remove,
+ .driver = {
+ .name = xillyname,
+ .owner = THIS_MODULE,
+ .of_match_table = xillybus_of_match,
+ },
+};
+
+module_platform_driver(xillybus_platform_driver);

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