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13#include <linux/module.h>
14#include <linux/device.h>
15#include <linux/slab.h>
16#include <linux/platform_device.h>
17#include <linux/of.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>
23#include "xillybus.h"
24
25MODULE_DESCRIPTION("Xillybus driver for Open Firmware");
26MODULE_AUTHOR("Eli Billauer, Xillybus Ltd.");
27MODULE_VERSION("1.06");
28MODULE_ALIAS("xillybus_of");
29MODULE_LICENSE("GPL v2");
30
31static const char xillyname[] = "xillybus_of";
32
33
34static const struct of_device_id xillybus_of_match[] = {
35 { .compatible = "xillybus,xillybus-1.00.a", },
36 { .compatible = "xlnx,xillybus-1.00.a", },
37 {}
38};
39
40MODULE_DEVICE_TABLE(of, xillybus_of_match);
41
42static void xilly_dma_sync_single_for_cpu_of(struct xilly_endpoint *ep,
43 dma_addr_t dma_handle,
44 size_t size,
45 int direction)
46{
47 dma_sync_single_for_cpu(ep->dev, dma_handle, size, direction);
48}
49
50static void xilly_dma_sync_single_for_device_of(struct xilly_endpoint *ep,
51 dma_addr_t dma_handle,
52 size_t size,
53 int direction)
54{
55 dma_sync_single_for_device(ep->dev, dma_handle, size, direction);
56}
57
58static void xilly_dma_sync_single_nop(struct xilly_endpoint *ep,
59 dma_addr_t dma_handle,
60 size_t size,
61 int direction)
62{
63}
64
65static void xilly_of_unmap(void *ptr)
66{
67 struct xilly_mapping *data = ptr;
68
69 dma_unmap_single(data->device, data->dma_addr,
70 data->size, data->direction);
71
72 kfree(ptr);
73}
74
75static int xilly_map_single_of(struct xilly_endpoint *ep,
76 void *ptr,
77 size_t size,
78 int direction,
79 dma_addr_t *ret_dma_handle
80 )
81{
82 dma_addr_t addr;
83 struct xilly_mapping *this;
84 int rc;
85
86 this = kzalloc(sizeof(*this), GFP_KERNEL);
87 if (!this)
88 return -ENOMEM;
89
90 addr = dma_map_single(ep->dev, ptr, size, direction);
91
92 if (dma_mapping_error(ep->dev, addr)) {
93 kfree(this);
94 return -ENODEV;
95 }
96
97 this->device = ep->dev;
98 this->dma_addr = addr;
99 this->size = size;
100 this->direction = direction;
101
102 *ret_dma_handle = addr;
103
104 rc = devm_add_action(ep->dev, xilly_of_unmap, this);
105
106 if (rc) {
107 dma_unmap_single(ep->dev, addr, size, direction);
108 kfree(this);
109 return rc;
110 }
111
112 return 0;
113}
114
115static struct xilly_endpoint_hardware of_hw = {
116 .owner = THIS_MODULE,
117 .hw_sync_sgl_for_cpu = xilly_dma_sync_single_for_cpu_of,
118 .hw_sync_sgl_for_device = xilly_dma_sync_single_for_device_of,
119 .map_single = xilly_map_single_of,
120};
121
122static struct xilly_endpoint_hardware of_hw_coherent = {
123 .owner = THIS_MODULE,
124 .hw_sync_sgl_for_cpu = xilly_dma_sync_single_nop,
125 .hw_sync_sgl_for_device = xilly_dma_sync_single_nop,
126 .map_single = xilly_map_single_of,
127};
128
129static int xilly_drv_probe(struct platform_device *op)
130{
131 struct device *dev = &op->dev;
132 struct xilly_endpoint *endpoint;
133 int rc;
134 int irq;
135 struct resource res;
136 struct xilly_endpoint_hardware *ephw = &of_hw;
137
138 if (of_property_read_bool(dev->of_node, "dma-coherent"))
139 ephw = &of_hw_coherent;
140
141 endpoint = xillybus_init_endpoint(NULL, dev, ephw);
142
143 if (!endpoint)
144 return -ENOMEM;
145
146 dev_set_drvdata(dev, endpoint);
147
148 rc = of_address_to_resource(dev->of_node, 0, &res);
149 endpoint->registers = devm_ioremap_resource(dev, &res);
150
151 if (IS_ERR(endpoint->registers))
152 return PTR_ERR(endpoint->registers);
153
154 irq = irq_of_parse_and_map(dev->of_node, 0);
155
156 rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint);
157
158 if (rc) {
159 dev_err(endpoint->dev,
160 "Failed to register IRQ handler. Aborting.\n");
161 return -ENODEV;
162 }
163
164 return xillybus_endpoint_discovery(endpoint);
165}
166
167static int xilly_drv_remove(struct platform_device *op)
168{
169 struct device *dev = &op->dev;
170 struct xilly_endpoint *endpoint = dev_get_drvdata(dev);
171
172 xillybus_endpoint_remove(endpoint);
173
174 return 0;
175}
176
177static struct platform_driver xillybus_platform_driver = {
178 .probe = xilly_drv_probe,
179 .remove = xilly_drv_remove,
180 .driver = {
181 .name = xillyname,
182 .of_match_table = xillybus_of_match,
183 },
184};
185
186module_platform_driver(xillybus_platform_driver);
187
