1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/mcb.h>
#include "mcb-internal.h"
struct mcb_parse_priv {
phys_addr_t mapbase;
void __iomem *base;
};
#define for_each_chameleon_cell(dtype, p) \
for ((dtype) = get_next_dtype((p)); \
(dtype) != CHAMELEON_DTYPE_END; \
(dtype) = get_next_dtype((p)))
static inline uint32_t get_next_dtype(void __iomem *p)
{
uint32_t dtype;
dtype = readl(p);
return dtype >> 28;
}
static int chameleon_parse_bdd(struct mcb_bus *bus,
phys_addr_t mapbase,
void __iomem *base)
{
return 0;
}
static int chameleon_parse_gdd(struct mcb_bus *bus,
phys_addr_t mapbase,
void __iomem *base)
{
struct chameleon_gdd __iomem *gdd =
(struct chameleon_gdd __iomem *) base;
struct mcb_device *mdev;
u32 offset;
u32 size;
int ret;
__le32 reg1;
__le32 reg2;
mdev = mcb_alloc_dev(bus);
if (!mdev)
return -ENOMEM;
reg1 = readl(&gdd->reg1);
reg2 = readl(&gdd->reg2);
offset = readl(&gdd->offset);
size = readl(&gdd->size);
mdev->id = GDD_DEV(reg1);
mdev->rev = GDD_REV(reg1);
mdev->var = GDD_VAR(reg1);
mdev->bar = GDD_BAR(reg2);
mdev->group = GDD_GRP(reg2);
mdev->inst = GDD_INS(reg2);
pr_debug("Found a 16z%03d\n", mdev->id);
mdev->irq.start = GDD_IRQ(reg1);
mdev->irq.end = GDD_IRQ(reg1);
mdev->irq.flags = IORESOURCE_IRQ;
mdev->mem.start = mapbase + offset;
mdev->mem.end = mdev->mem.start + size - 1;
mdev->mem.flags = IORESOURCE_MEM;
mdev->is_added = false;
ret = mcb_device_register(bus, mdev);
if (ret < 0)
goto err;
return 0;
err:
mcb_free_dev(mdev);
return ret;
}
int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
void __iomem *base)
{
char __iomem *p = base;
struct chameleon_fpga_header *header;
uint32_t dtype;
int num_cells = 0;
int ret = 0;
u32 hsize;
hsize = sizeof(struct chameleon_fpga_header);
header = kzalloc(hsize, GFP_KERNEL);
if (!header)
return -ENOMEM;
/* Extract header information */
memcpy_fromio(header, p, hsize);
/* We only support chameleon v2 at the moment */
header->magic = le16_to_cpu(header->magic);
if (header->magic != CHAMELEONV2_MAGIC) {
pr_err("Unsupported chameleon version 0x%x\n",
header->magic);
kfree(header);
return -ENODEV;
}
p += hsize;
pr_debug("header->revision = %d\n", header->revision);
pr_debug("header->model = 0x%x ('%c')\n", header->model,
header->model);
pr_debug("header->minor = %d\n", header->minor);
pr_debug("header->bus_type = 0x%x\n", header->bus_type);
pr_debug("header->magic = 0x%x\n", header->magic);
pr_debug("header->filename = \"%.*s\"\n", CHAMELEON_FILENAME_LEN,
header->filename);
for_each_chameleon_cell(dtype, p) {
switch (dtype) {
case CHAMELEON_DTYPE_GENERAL:
ret = chameleon_parse_gdd(bus, mapbase, p);
if (ret < 0)
goto out;
p += sizeof(struct chameleon_gdd);
break;
case CHAMELEON_DTYPE_BRIDGE:
chameleon_parse_bdd(bus, mapbase, p);
p += sizeof(struct chameleon_bdd);
break;
case CHAMELEON_DTYPE_END:
break;
default:
pr_err("Invalid chameleon descriptor type 0x%x\n",
dtype);
kfree(header);
return -EINVAL;
}
num_cells++;
}
if (num_cells == 0)
num_cells = -EINVAL;
kfree(header);
return num_cells;
out:
kfree(header);
return ret;
}
EXPORT_SYMBOL_GPL(chameleon_parse_cells);
|
