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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
static char* lora_gpio_pin_name_by_attr_name(const char* name, int port) {
switch (port) {
case port_1:
if (! strcmp(name, "reset")) {
return "ap1-reset";
} else if (!strcmp(name,"cdone")) {
return "ap1-cdone";
} else if (!strcmp(name,"creset")) {
return "ap1-creset";
} else {
log_error("attribute name [%s] is invalid for LORA in port %d", name, port);
return "";
}
case port_2:
if (! strcmp(name, "reset")) {
return "ap2-reset";
} else if (!strcmp(name,"cdone")) {
return "ap2-cdone";
} else if (!strcmp(name,"creset")) {
return "ap2-creset";
} else {
log_error("attribute name [%s] is invalid for LORA in port %d", name, port);
return "";
}
}
}
// 1 reset
// 1 vendor-id
// 1 product-id
// 1 device-id
// 1 hw-version
// 1 eui
// 1 cdone
// 1 creset
// NULL
static size_t ap_lora_attrs_size = 9;
// Set the hardware version if the ROM string matches one of the valid
// hardware versions.
// Lengths of strings must be the same for a match, then can compare
// text. Without a length check a subset of a string could be a match.
#define COMPARE_AND_ASSIGN(CANDIDATE) ((hw_version_len == (sizeof(HW_VERSION_ ## CANDIDATE)-1)) && \
(strncmp(ap_eeprom[port_index].hw_version, HW_VERSION_ ## CANDIDATE, sizeof(HW_VERSION_ ## CANDIDATE)) == 0)) \
lora_hw_version = CANDIDATE;
static bool lora_setup(enum ap port) {
int i;
int port_index = port - 1;
int index = 0;
int count = 0;
int ret;
char buf[32];
struct kobj_attribute* attr;
struct attribute **attrs;
int lora_hw_version;
int hw_version_len;
log_info("loading LORA accessory card in port %d", port);
sprintf(buf, "ap%d", port);
ap_subdirs[port_index] = kobject_create_and_add(buf, &mts_io_platform_device->dev.kobj);
if (! ap_subdirs[port_index]) {
log_error("kobject_create_and_add in port %d failed", port);
return false;
}
// create the link to the apX directory this card is in
// if we're in the first slot, we get plain "lora"
// if we're in a different slot, we might need to use "lora-2" to differentiate
if (port > 1) {
for (i = 1; i < port; i++) {
if (port_info[i - 1]) {
if (strstr(port_info[i - 1]->product_id, PRODUCT_ID_MTAC_LORA)) {
count++;
}
}
}
}
if (count > 0) {
sprintf(buf, "lora-%d", count + 1);
} else {
sprintf(buf, "lora");
}
ret = sysfs_create_link(ap_subdirs[port_index]->parent, ap_subdirs[port_index], buf);
if (ret) {
log_error("failed to link [%s] to [%s], %d", buf, ap_subdirs[port_index]->name, ret);
} else
log_info("created link [%s] to [%s], success:%d", buf, ap_subdirs[port_index]->name, ret);
attrs = kzalloc(sizeof(struct attribute*) * ap_lora_attrs_size, GFP_KERNEL);
if (! attrs) {
log_error("failed to allocate attribute space for port %d", port);
return false;
}
// hw_version string length, null character not counted.
hw_version_len = strnlen(ap_eeprom[port_index].hw_version,sizeof ap_eeprom[port_index].hw_version);
if COMPARE_AND_ASSIGN(MTAC_LORA_0_0)
else if COMPARE_AND_ASSIGN(MTAC_LORA_1_0)
else if COMPARE_AND_ASSIGN(MTAC_LORA_1_5)
else {
log_error("Unknown hw-version in port %d", port);
kfree(attrs);
return false;
}
// add reset line attribute for MTAC_LORA_0_0
if (lora_hw_version == MTAC_LORA_0_0) {
sprintf(buf, "reset");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for LORA in port %d", buf, port);
kfree(attrs);
return false;
}
attr->show = mts_attr_show_ap_gpio_pin;
attr->store = mts_attr_store_ap_gpio_pin;
attrs[index++] = &attr->attr;
}
else if (lora_hw_version == MTAC_LORA_1_5) {
// Substitute pins for this port
log_info("Substitute pins");
int ipin = 0;
while(*(lora_h[port_index][ipin].name)) {
struct gpio_pin *p;
p = gpio_pin_by_num(lora_h[port_index][ipin].pin.gpio);
if(p) {
log_info("LORA H: Replace name %s with name %s",p->name,lora_h[port_index][ipin].name);
log_info("LORA H: Replace pin number %u with number %u",p->pin.gpio,lora_h[port_index][ipin].pin.gpio);
*p = lora_h[port_index][ipin];
}
ipin++;
}
//add support for reset
sprintf(buf, "reset");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for LORA in port %d", buf, port);
kfree(attrs);
return false;
}
attr->show = mts_attr_show_ap_gpio_pin;
attr->store = mts_attr_store_ap_gpio_pin;
attrs[index++] = &attr->attr;
//GPIO1 - cdone on FPGA - input to CPU
sprintf(buf, "cdone");
attr = create_attribute(buf, MTS_ATTR_MODE_RO);
if (! attr) {
log_error("failed to create attribute [%s] for LORA in port %d", buf, port);
kfree(attrs);
return false;
}
attr->show = mts_attr_show_ap_gpio_pin;
attrs[index++] = &attr->attr;
//GPIO2 reset on FPGA - output from CPU
sprintf(buf, "creset");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for LORA in port %d", buf, port);
kfree(attrs);
return false;
}
attr->show = mts_attr_show_ap_gpio_pin;
attr->store = mts_attr_store_ap_gpio_pin;
attrs[index++] = &attr->attr;
if(index >= ap_lora_attrs_size) {
panic("Internal error, too many attributes on the LORA card index %d >= %d",
index,ap_lora_attrs_size);
}
}
// add attributes for eeprom contents
ret = ap_add_product_info_attributes(port, lora_hw_version, attrs, &index);
attrs[index] = NULL; // Terminate the array.
ap_attr_groups[port_index].attrs = attrs; // attrs available for teardown.
if (!ret) {
log_error("failed to add product info attributes for LORA in port %d", port);
return false;
}
log_info("ap_subdirs[port_index=%d] = %p ap_subdirs[port_index=%d]=%p",
port_index,ap_subdirs[port_index],port_index,&ap_attr_groups[port_index]);
if (sysfs_create_group(ap_subdirs[port_index], &ap_attr_groups[port_index])) {
log_error("sysfs_create_group failed for LORA in port %d", port);
return false;
}
return true;
}
static bool lora_teardown(enum ap port) {
int i;
int port_index = port - 1;
struct attribute **attrs = ap_attr_groups[port_index].attrs;
log_info("unloading LORA accessory card in port %d", port);
if(attrs) {
// clean up allocated memory for attributes
for (i = 0; i < ap_lora_attrs_size; i++) {
if (attrs[i]) {
if (attrs[i]->name)
kfree(attrs[i]->name);
kfree(attrs[i]);
}
}
kfree(attrs);
}
// clean up our "apX/" kobject if it exists
if (ap_subdirs[port_index]) {
kobject_put(ap_subdirs[port_index]);
}
return true;
}
bool set_lora_info(struct ap_info* info) {
snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_LORA);
info->setup = &lora_setup;
info->teardown = &lora_teardown;
info->gpio_pin_name_by_attr_name = &lora_gpio_pin_name_by_attr_name;
return true;
}
|
