Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / char / xillybus / xillybus_of.c

diff --git a/kernel/drivers/char/xillybus/xillybus_of.c b/kernel/drivers/char/xillybus/xillybus_of.c
new file mode 100644 (file)
index 0000000..7818650
--- /dev/null
+++ b/kernel/drivers/char/xillybus/xillybus_of.c
@@ -0,0 +1,186 @@
+/*
+ * 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 const 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,
+               .of_match_table = xillybus_of_match,
+       },
+};
+
+module_platform_driver(xillybus_platform_driver);