1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/of.h>
21#include <linux/platform_device.h>
22
23#include "vitesse-vsc73xx.h"
24
25#define VSC73XX_CMD_PLATFORM_BLOCK_SHIFT 14
26#define VSC73XX_CMD_PLATFORM_BLOCK_MASK 0x7
27#define VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT 10
28#define VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK 0xf
29#define VSC73XX_CMD_PLATFORM_REGISTER_SHIFT 2
30
31
32
33
34struct vsc73xx_platform {
35 struct platform_device *pdev;
36 void __iomem *base_addr;
37 struct vsc73xx vsc;
38};
39
40static const struct vsc73xx_ops vsc73xx_platform_ops;
41
42static u32 vsc73xx_make_addr(u8 block, u8 subblock, u8 reg)
43{
44 u32 ret;
45
46 ret = (block & VSC73XX_CMD_PLATFORM_BLOCK_MASK)
47 << VSC73XX_CMD_PLATFORM_BLOCK_SHIFT;
48 ret |= (subblock & VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK)
49 << VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT;
50 ret |= reg << VSC73XX_CMD_PLATFORM_REGISTER_SHIFT;
51
52 return ret;
53}
54
55static int vsc73xx_platform_read(struct vsc73xx *vsc, u8 block, u8 subblock,
56 u8 reg, u32 *val)
57{
58 struct vsc73xx_platform *vsc_platform = vsc->priv;
59 u32 offset;
60
61 if (!vsc73xx_is_addr_valid(block, subblock))
62 return -EINVAL;
63
64 offset = vsc73xx_make_addr(block, subblock, reg);
65
66
67
68 *val = ioread32be(vsc_platform->base_addr + offset);
69
70 return 0;
71}
72
73static int vsc73xx_platform_write(struct vsc73xx *vsc, u8 block, u8 subblock,
74 u8 reg, u32 val)
75{
76 struct vsc73xx_platform *vsc_platform = vsc->priv;
77 u32 offset;
78
79 if (!vsc73xx_is_addr_valid(block, subblock))
80 return -EINVAL;
81
82 offset = vsc73xx_make_addr(block, subblock, reg);
83 iowrite32be(val, vsc_platform->base_addr + offset);
84
85 return 0;
86}
87
88static int vsc73xx_platform_probe(struct platform_device *pdev)
89{
90 struct device *dev = &pdev->dev;
91 struct vsc73xx_platform *vsc_platform;
92 int ret;
93
94 vsc_platform = devm_kzalloc(dev, sizeof(*vsc_platform), GFP_KERNEL);
95 if (!vsc_platform)
96 return -ENOMEM;
97
98 platform_set_drvdata(pdev, vsc_platform);
99 vsc_platform->pdev = pdev;
100 vsc_platform->vsc.dev = dev;
101 vsc_platform->vsc.priv = vsc_platform;
102 vsc_platform->vsc.ops = &vsc73xx_platform_ops;
103
104
105 vsc_platform->base_addr = devm_platform_ioremap_resource(pdev, 0);
106 if (IS_ERR(vsc_platform->base_addr)) {
107 dev_err(&pdev->dev, "cannot request I/O memory space\n");
108 ret = -ENXIO;
109 return ret;
110 }
111
112 return vsc73xx_probe(&vsc_platform->vsc);
113}
114
115static int vsc73xx_platform_remove(struct platform_device *pdev)
116{
117 struct vsc73xx_platform *vsc_platform = platform_get_drvdata(pdev);
118
119 if (!vsc_platform)
120 return 0;
121
122 vsc73xx_remove(&vsc_platform->vsc);
123
124 platform_set_drvdata(pdev, NULL);
125
126 return 0;
127}
128
129static void vsc73xx_platform_shutdown(struct platform_device *pdev)
130{
131 struct vsc73xx_platform *vsc_platform = platform_get_drvdata(pdev);
132
133 if (!vsc_platform)
134 return;
135
136 vsc73xx_shutdown(&vsc_platform->vsc);
137
138 platform_set_drvdata(pdev, NULL);
139}
140
141static const struct vsc73xx_ops vsc73xx_platform_ops = {
142 .read = vsc73xx_platform_read,
143 .write = vsc73xx_platform_write,
144};
145
146static const struct of_device_id vsc73xx_of_match[] = {
147 {
148 .compatible = "vitesse,vsc7385",
149 },
150 {
151 .compatible = "vitesse,vsc7388",
152 },
153 {
154 .compatible = "vitesse,vsc7395",
155 },
156 {
157 .compatible = "vitesse,vsc7398",
158 },
159 { },
160};
161MODULE_DEVICE_TABLE(of, vsc73xx_of_match);
162
163static struct platform_driver vsc73xx_platform_driver = {
164 .probe = vsc73xx_platform_probe,
165 .remove = vsc73xx_platform_remove,
166 .shutdown = vsc73xx_platform_shutdown,
167 .driver = {
168 .name = "vsc73xx-platform",
169 .of_match_table = vsc73xx_of_match,
170 },
171};
172module_platform_driver(vsc73xx_platform_driver);
173
174MODULE_AUTHOR("Pawel Dembicki <paweldembicki@gmail.com>");
175MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 Platform driver");
176MODULE_LICENSE("GPL v2");
177
