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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> | |
18 | #include <linux/of_irq.h> | |
19 | #include <linux/of_address.h> | |
20 | #include <linux/of_device.h> | |
21 | #include <linux/of_platform.h> | |
9267462e | 22 | #include <linux/err.h> |
48bae050 EB |
23 | #include "xillybus.h" |
24 | ||
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"); | |
30 | ||
e71042f2 EB |
31 | static const char xillyname[] = "xillybus_of"; |
32 | ||
48bae050 | 33 | /* Match table for of_platform binding */ |
da2ff527 | 34 | static const struct of_device_id xillybus_of_match[] = { |
24b33c90 EB |
35 | { .compatible = "xillybus,xillybus-1.00.a", }, |
36 | { .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */ | |
48bae050 EB |
37 | {} |
38 | }; | |
39 | ||
40 | MODULE_DEVICE_TABLE(of, xillybus_of_match); | |
41 | ||
42 | static 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 | ||
50 | static 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 | ||
cc212550 EB |
58 | static 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 | ||
525be905 | 65 | static void xilly_of_unmap(void *ptr) |
48bae050 | 66 | { |
525be905 | 67 | struct xilly_mapping *data = ptr; |
48bae050 | 68 | |
525be905 EB |
69 | dma_unmap_single(data->device, data->dma_addr, |
70 | data->size, data->direction); | |
71 | ||
72 | kfree(ptr); | |
73 | } | |
74 | ||
75 | static 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; | |
48bae050 | 85 | |
525be905 | 86 | this = kzalloc(sizeof(*this), GFP_KERNEL); |
48bae050 | 87 | if (!this) |
525be905 | 88 | return -ENOMEM; |
48bae050 EB |
89 | |
90 | addr = dma_map_single(ep->dev, ptr, size, direction); | |
48bae050 EB |
91 | |
92 | if (dma_mapping_error(ep->dev, addr)) { | |
93 | kfree(this); | |
525be905 | 94 | return -ENODEV; |
48bae050 EB |
95 | } |
96 | ||
525be905 | 97 | this->device = ep->dev; |
48bae050 | 98 | this->dma_addr = addr; |
48bae050 | 99 | this->size = size; |
525be905 | 100 | this->direction = direction; |
48bae050 | 101 | |
525be905 | 102 | *ret_dma_handle = addr; |
48bae050 | 103 | |
525be905 | 104 | rc = devm_add_action(ep->dev, xilly_of_unmap, this); |
48bae050 | 105 | |
525be905 EB |
106 | if (rc) { |
107 | dma_unmap_single(ep->dev, addr, size, direction); | |
108 | kfree(this); | |
40931bbb | 109 | return rc; |
525be905 EB |
110 | } |
111 | ||
40931bbb | 112 | return 0; |
48bae050 EB |
113 | } |
114 | ||
115 | static struct xilly_endpoint_hardware of_hw = { | |
116 | .owner = THIS_MODULE, | |
7ee9ded2 EB |
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, | |
48bae050 | 119 | .map_single = xilly_map_single_of, |
48bae050 EB |
120 | }; |
121 | ||
cc212550 EB |
122 | static 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, | |
cc212550 EB |
127 | }; |
128 | ||
48bae050 EB |
129 | static int xilly_drv_probe(struct platform_device *op) |
130 | { | |
131 | struct device *dev = &op->dev; | |
132 | struct xilly_endpoint *endpoint; | |
40931bbb | 133 | int rc; |
48bae050 | 134 | int irq; |
9267462e | 135 | struct resource res; |
cc212550 EB |
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; | |
48bae050 | 140 | |
cc212550 | 141 | endpoint = xillybus_init_endpoint(NULL, dev, ephw); |
48bae050 EB |
142 | |
143 | if (!endpoint) | |
144 | return -ENOMEM; | |
145 | ||
146 | dev_set_drvdata(dev, endpoint); | |
147 | ||
9267462e | 148 | rc = of_address_to_resource(dev->of_node, 0, &res); |
9267462e | 149 | endpoint->registers = devm_ioremap_resource(dev, &res); |
48bae050 | 150 | |
9267462e EB |
151 | if (IS_ERR(endpoint->registers)) |
152 | return PTR_ERR(endpoint->registers); | |
48bae050 EB |
153 | |
154 | irq = irq_of_parse_and_map(dev->of_node, 0); | |
155 | ||
9267462e | 156 | rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint); |
48bae050 EB |
157 | |
158 | if (rc) { | |
1a2f9a9e EB |
159 | dev_err(endpoint->dev, |
160 | "Failed to register IRQ handler. Aborting.\n"); | |
9267462e | 161 | return -ENODEV; |
48bae050 EB |
162 | } |
163 | ||
525be905 | 164 | return xillybus_endpoint_discovery(endpoint); |
48bae050 EB |
165 | } |
166 | ||
167 | static int xilly_drv_remove(struct platform_device *op) | |
168 | { | |
169 | struct device *dev = &op->dev; | |
170 | struct xilly_endpoint *endpoint = dev_get_drvdata(dev); | |
48bae050 EB |
171 | |
172 | xillybus_endpoint_remove(endpoint); | |
173 | ||
48bae050 EB |
174 | return 0; |
175 | } | |
176 | ||
177 | static struct platform_driver xillybus_platform_driver = { | |
178 | .probe = xilly_drv_probe, | |
179 | .remove = xilly_drv_remove, | |
180 | .driver = { | |
181 | .name = xillyname, | |
48bae050 EB |
182 | .of_match_table = xillybus_of_match, |
183 | }, | |
184 | }; | |
185 | ||
7a620a65 | 186 | module_platform_driver(xillybus_platform_driver); |