]>
Commit | Line | Data |
---|---|---|
48bae050 EB |
1 | /* |
2 | * linux/drivers/misc/xillybus_of.c | |
3 | * | |
4 | * Copyright 2011 Xillybus Ltd, http://xillybus.com | |
5 | * | |
6 | * Driver for the Xillybus FPGA/host framework using Open Firmware. | |
7 | * | |
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. | |
11 | */ | |
12 | ||
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> | |
9267462e | 18 | #include <linux/err.h> |
48bae050 EB |
19 | #include "xillybus.h" |
20 | ||
21 | MODULE_DESCRIPTION("Xillybus driver for Open Firmware"); | |
22 | MODULE_AUTHOR("Eli Billauer, Xillybus Ltd."); | |
23 | MODULE_VERSION("1.06"); | |
24 | MODULE_ALIAS("xillybus_of"); | |
25 | MODULE_LICENSE("GPL v2"); | |
26 | ||
e71042f2 EB |
27 | static const char xillyname[] = "xillybus_of"; |
28 | ||
48bae050 | 29 | /* Match table for of_platform binding */ |
da2ff527 | 30 | static const struct of_device_id xillybus_of_match[] = { |
24b33c90 EB |
31 | { .compatible = "xillybus,xillybus-1.00.a", }, |
32 | { .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */ | |
48bae050 EB |
33 | {} |
34 | }; | |
35 | ||
36 | MODULE_DEVICE_TABLE(of, xillybus_of_match); | |
37 | ||
38 | static void xilly_dma_sync_single_for_cpu_of(struct xilly_endpoint *ep, | |
39 | dma_addr_t dma_handle, | |
40 | size_t size, | |
41 | int direction) | |
42 | { | |
43 | dma_sync_single_for_cpu(ep->dev, dma_handle, size, direction); | |
44 | } | |
45 | ||
46 | static void xilly_dma_sync_single_for_device_of(struct xilly_endpoint *ep, | |
47 | dma_addr_t dma_handle, | |
48 | size_t size, | |
49 | int direction) | |
50 | { | |
51 | dma_sync_single_for_device(ep->dev, dma_handle, size, direction); | |
52 | } | |
53 | ||
cc212550 EB |
54 | static void xilly_dma_sync_single_nop(struct xilly_endpoint *ep, |
55 | dma_addr_t dma_handle, | |
56 | size_t size, | |
57 | int direction) | |
58 | { | |
59 | } | |
60 | ||
525be905 | 61 | static void xilly_of_unmap(void *ptr) |
48bae050 | 62 | { |
525be905 | 63 | struct xilly_mapping *data = ptr; |
48bae050 | 64 | |
525be905 EB |
65 | dma_unmap_single(data->device, data->dma_addr, |
66 | data->size, data->direction); | |
67 | ||
68 | kfree(ptr); | |
69 | } | |
70 | ||
71 | static int xilly_map_single_of(struct xilly_endpoint *ep, | |
72 | void *ptr, | |
73 | size_t size, | |
74 | int direction, | |
75 | dma_addr_t *ret_dma_handle | |
76 | ) | |
77 | { | |
78 | dma_addr_t addr; | |
79 | struct xilly_mapping *this; | |
48bae050 | 80 | |
525be905 | 81 | this = kzalloc(sizeof(*this), GFP_KERNEL); |
48bae050 | 82 | if (!this) |
525be905 | 83 | return -ENOMEM; |
48bae050 EB |
84 | |
85 | addr = dma_map_single(ep->dev, ptr, size, direction); | |
48bae050 EB |
86 | |
87 | if (dma_mapping_error(ep->dev, addr)) { | |
88 | kfree(this); | |
525be905 | 89 | return -ENODEV; |
48bae050 EB |
90 | } |
91 | ||
525be905 | 92 | this->device = ep->dev; |
48bae050 | 93 | this->dma_addr = addr; |
48bae050 | 94 | this->size = size; |
525be905 | 95 | this->direction = direction; |
48bae050 | 96 | |
525be905 | 97 | *ret_dma_handle = addr; |
48bae050 | 98 | |
bd83a4ab | 99 | return devm_add_action_or_reset(ep->dev, xilly_of_unmap, this); |
48bae050 EB |
100 | } |
101 | ||
102 | static struct xilly_endpoint_hardware of_hw = { | |
103 | .owner = THIS_MODULE, | |
7ee9ded2 EB |
104 | .hw_sync_sgl_for_cpu = xilly_dma_sync_single_for_cpu_of, |
105 | .hw_sync_sgl_for_device = xilly_dma_sync_single_for_device_of, | |
48bae050 | 106 | .map_single = xilly_map_single_of, |
48bae050 EB |
107 | }; |
108 | ||
cc212550 EB |
109 | static struct xilly_endpoint_hardware of_hw_coherent = { |
110 | .owner = THIS_MODULE, | |
111 | .hw_sync_sgl_for_cpu = xilly_dma_sync_single_nop, | |
112 | .hw_sync_sgl_for_device = xilly_dma_sync_single_nop, | |
113 | .map_single = xilly_map_single_of, | |
cc212550 EB |
114 | }; |
115 | ||
48bae050 EB |
116 | static int xilly_drv_probe(struct platform_device *op) |
117 | { | |
118 | struct device *dev = &op->dev; | |
119 | struct xilly_endpoint *endpoint; | |
40931bbb | 120 | int rc; |
48bae050 | 121 | int irq; |
74d83a5d | 122 | struct resource *res; |
cc212550 EB |
123 | struct xilly_endpoint_hardware *ephw = &of_hw; |
124 | ||
125 | if (of_property_read_bool(dev->of_node, "dma-coherent")) | |
126 | ephw = &of_hw_coherent; | |
48bae050 | 127 | |
cc212550 | 128 | endpoint = xillybus_init_endpoint(NULL, dev, ephw); |
48bae050 EB |
129 | |
130 | if (!endpoint) | |
131 | return -ENOMEM; | |
132 | ||
133 | dev_set_drvdata(dev, endpoint); | |
134 | ||
74d83a5d RH |
135 | res = platform_get_resource(op, IORESOURCE_MEM, 0); |
136 | endpoint->registers = devm_ioremap_resource(dev, res); | |
48bae050 | 137 | |
9267462e EB |
138 | if (IS_ERR(endpoint->registers)) |
139 | return PTR_ERR(endpoint->registers); | |
48bae050 | 140 | |
74d83a5d | 141 | irq = platform_get_irq(op, 0); |
48bae050 | 142 | |
9267462e | 143 | rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint); |
48bae050 EB |
144 | |
145 | if (rc) { | |
1a2f9a9e EB |
146 | dev_err(endpoint->dev, |
147 | "Failed to register IRQ handler. Aborting.\n"); | |
9267462e | 148 | return -ENODEV; |
48bae050 EB |
149 | } |
150 | ||
525be905 | 151 | return xillybus_endpoint_discovery(endpoint); |
48bae050 EB |
152 | } |
153 | ||
154 | static int xilly_drv_remove(struct platform_device *op) | |
155 | { | |
156 | struct device *dev = &op->dev; | |
157 | struct xilly_endpoint *endpoint = dev_get_drvdata(dev); | |
48bae050 EB |
158 | |
159 | xillybus_endpoint_remove(endpoint); | |
160 | ||
48bae050 EB |
161 | return 0; |
162 | } | |
163 | ||
164 | static struct platform_driver xillybus_platform_driver = { | |
165 | .probe = xilly_drv_probe, | |
166 | .remove = xilly_drv_remove, | |
167 | .driver = { | |
168 | .name = xillyname, | |
48bae050 EB |
169 | .of_match_table = xillybus_of_match, |
170 | }, | |
171 | }; | |
172 | ||
7a620a65 | 173 | module_platform_driver(xillybus_platform_driver); |