2 * linux/drivers/misc/xillybus_of.c
4 * Copyright 2011 Xillybus Ltd, http://xillybus.com
6 * Driver for the Xillybus FPGA/host framework using Open Firmware.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the smems of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
13 #include <linux/module.h>
14 #include <linux/device.h>
15 #include <linux/slab.h>
16 #include <linux/platform_device.h>
18 #include <linux/of_irq.h>
19 #include <linux/of_address.h>
20 #include <linux/of_device.h>
21 #include <linux/of_platform.h>
22 #include <linux/err.h>
25 MODULE_DESCRIPTION("Xillybus driver for Open Firmware");
26 MODULE_AUTHOR("Eli Billauer, Xillybus Ltd.");
27 MODULE_VERSION("1.06");
28 MODULE_ALIAS("xillybus_of");
29 MODULE_LICENSE("GPL v2");
31 static const char xillyname[] = "xillybus_of";
33 /* Match table for of_platform binding */
34 static struct of_device_id xillybus_of_match[] = {
35 { .compatible = "xillybus,xillybus-1.00.a", },
36 { .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */
40 MODULE_DEVICE_TABLE(of, xillybus_of_match);
42 static void xilly_dma_sync_single_for_cpu_of(struct xilly_endpoint *ep,
43 dma_addr_t dma_handle,
47 dma_sync_single_for_cpu(ep->dev, dma_handle, size, direction);
50 static void xilly_dma_sync_single_for_device_of(struct xilly_endpoint *ep,
51 dma_addr_t dma_handle,
55 dma_sync_single_for_device(ep->dev, dma_handle, size, direction);
58 static void xilly_dma_sync_single_nop(struct xilly_endpoint *ep,
59 dma_addr_t dma_handle,
65 static dma_addr_t xilly_map_single_of(struct xilly_cleanup *mem,
66 struct xilly_endpoint *ep,
74 struct xilly_dma *this;
76 this = kmalloc(sizeof(struct xilly_dma), GFP_KERNEL);
80 addr = dma_map_single(ep->dev, ptr, size, direction);
81 this->direction = direction;
83 if (dma_mapping_error(ep->dev, addr)) {
88 this->dma_addr = addr;
92 list_add_tail(&this->node, &mem->to_unmap);
97 static void xilly_unmap_single_of(struct xilly_dma *entry)
99 dma_unmap_single(entry->dev,
105 static struct xilly_endpoint_hardware of_hw = {
106 .owner = THIS_MODULE,
107 .hw_sync_sgl_for_cpu = xilly_dma_sync_single_for_cpu_of,
108 .hw_sync_sgl_for_device = xilly_dma_sync_single_for_device_of,
109 .map_single = xilly_map_single_of,
110 .unmap_single = xilly_unmap_single_of
113 static struct xilly_endpoint_hardware of_hw_coherent = {
114 .owner = THIS_MODULE,
115 .hw_sync_sgl_for_cpu = xilly_dma_sync_single_nop,
116 .hw_sync_sgl_for_device = xilly_dma_sync_single_nop,
117 .map_single = xilly_map_single_of,
118 .unmap_single = xilly_unmap_single_of
121 static int xilly_drv_probe(struct platform_device *op)
123 struct device *dev = &op->dev;
124 struct xilly_endpoint *endpoint;
128 struct xilly_endpoint_hardware *ephw = &of_hw;
130 if (of_property_read_bool(dev->of_node, "dma-coherent"))
131 ephw = &of_hw_coherent;
133 endpoint = xillybus_init_endpoint(NULL, dev, ephw);
138 dev_set_drvdata(dev, endpoint);
140 rc = of_address_to_resource(dev->of_node, 0, &res);
142 dev_warn(endpoint->dev,
143 "Failed to obtain device tree resource\n");
147 endpoint->registers = devm_ioremap_resource(dev, &res);
149 if (IS_ERR(endpoint->registers))
150 return PTR_ERR(endpoint->registers);
152 irq = irq_of_parse_and_map(dev->of_node, 0);
154 rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint);
157 dev_err(endpoint->dev,
158 "Failed to register IRQ handler. Aborting.\n");
162 rc = xillybus_endpoint_discovery(endpoint);
167 xillybus_do_cleanup(&endpoint->cleanup, endpoint);
172 static int xilly_drv_remove(struct platform_device *op)
174 struct device *dev = &op->dev;
175 struct xilly_endpoint *endpoint = dev_get_drvdata(dev);
177 xillybus_endpoint_remove(endpoint);
179 xillybus_do_cleanup(&endpoint->cleanup, endpoint);
184 static struct platform_driver xillybus_platform_driver = {
185 .probe = xilly_drv_probe,
186 .remove = xilly_drv_remove,
189 .owner = THIS_MODULE,
190 .of_match_table = xillybus_of_match,
194 module_platform_driver(xillybus_platform_driver);