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5a204478 WG |
1 | /* |
2 | * iplink_can.c CAN device support | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Wolfgang Grandegger <wg@grandegger.com> | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | ||
16 | #include <linux/can/netlink.h> | |
17 | ||
18 | #include "rt_names.h" | |
19 | #include "utils.h" | |
20 | #include "ip_common.h" | |
21 | ||
22 | static void usage(void) | |
23 | { | |
24 | fprintf(stderr, | |
25 | "Usage: ip link set DEVICE type can\n" | |
26 | "\t[ bitrate BITRATE [ sample-point SAMPLE-POINT] ] | \n" | |
27 | "\t[ tq TQ prop-seg PROP_SEG phase-seg1 PHASE-SEG1\n " | |
28 | "\t phase-seg2 PHASE-SEG2 [ sjw SJW ] ]\n" | |
29 | "\n" | |
30 | "\t[ loopback { on | off } ]\n" | |
31 | "\t[ listen-only { on | off } ]\n" | |
32 | "\t[ triple-sampling { on | off } ]\n" | |
8a517946 WG |
33 | "\t[ one-shot { on | off } ]\n" |
34 | "\t[ berr-reporting { on | off } ]\n" | |
5a204478 WG |
35 | "\n" |
36 | "\t[ restart-ms TIME-MS ]\n" | |
37 | "\t[ restart ]\n" | |
38 | "\n" | |
39 | "\tWhere: BITRATE := { 1..1000000 }\n" | |
40 | "\t SAMPLE-POINT := { 0.000..0.999 }\n" | |
41 | "\t TQ := { NUMBER }\n" | |
42 | "\t PROP-SEG := { 1..8 }\n" | |
43 | "\t PHASE-SEG1 := { 1..8 }\n" | |
44 | "\t PHASE-SEG2 := { 1..8 }\n" | |
45 | "\t SJW := { 1..4 }\n" | |
46 | "\t RESTART-MS := { 0 | NUMBER }\n" | |
47 | ); | |
48 | } | |
49 | ||
50 | static int get_float(float *val, const char *arg) | |
51 | { | |
52 | float res; | |
53 | char *ptr; | |
54 | ||
55 | if (!arg || !*arg) | |
56 | return -1; | |
57 | res = strtof(arg, &ptr); | |
58 | if (!ptr || ptr == arg || *ptr) | |
59 | return -1; | |
60 | *val = res; | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static void set_ctrlmode(char* name, char *arg, | |
65 | struct can_ctrlmode *cm, __u32 flags) | |
66 | { | |
67 | if (strcmp(arg, "on") == 0) { | |
68 | cm->flags |= flags; | |
69 | } else if (strcmp(arg, "off") != 0) { | |
70 | fprintf(stderr, | |
14645ec2 KR |
71 | "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n", |
72 | name, arg); | |
5a204478 WG |
73 | exit(-1); |
74 | } | |
75 | cm->mask |= flags; | |
76 | } | |
77 | ||
78 | static void print_ctrlmode(FILE *f, __u32 cm) | |
79 | { | |
80 | fprintf(f, "<"); | |
81 | #define _PF(cmflag, cmname) \ | |
82 | if (cm & cmflag) { \ | |
83 | cm &= ~cmflag; \ | |
84 | fprintf(f, "%s%s", cmname, cm ? "," : ""); \ | |
85 | } | |
86 | _PF(CAN_CTRLMODE_LOOPBACK, "LOOPBACK"); | |
87 | _PF(CAN_CTRLMODE_LISTENONLY, "LISTEN-ONLY"); | |
88 | _PF(CAN_CTRLMODE_3_SAMPLES, "TRIPLE-SAMPLING"); | |
8a517946 WG |
89 | _PF(CAN_CTRLMODE_ONE_SHOT, "ONE-SHOT"); |
90 | _PF(CAN_CTRLMODE_BERR_REPORTING, "BERR-REPORTING"); | |
5a204478 WG |
91 | #undef _PF |
92 | if (cm) | |
93 | fprintf(f, "%x", cm); | |
94 | fprintf(f, "> "); | |
95 | } | |
96 | ||
97 | static int can_parse_opt(struct link_util *lu, int argc, char **argv, | |
98 | struct nlmsghdr *n) | |
99 | { | |
100 | struct can_bittiming bt; | |
101 | struct can_ctrlmode cm = {0, 0}; | |
102 | ||
103 | memset(&bt, 0, sizeof(bt)); | |
104 | while (argc > 0) { | |
105 | if (matches(*argv, "bitrate") == 0) { | |
106 | NEXT_ARG(); | |
107 | if (get_u32(&bt.bitrate, *argv, 0)) | |
108 | invarg("invalid \"bitrate\" value\n", *argv); | |
109 | } else if (matches(*argv, "sample-point") == 0) { | |
110 | float sp; | |
111 | ||
112 | NEXT_ARG(); | |
113 | if (get_float(&sp, *argv)) | |
114 | invarg("invalid \"sample-point\" value\n", | |
115 | *argv); | |
116 | bt.sample_point = (__u32)(sp * 1000); | |
117 | } else if (matches(*argv, "tq") == 0) { | |
118 | NEXT_ARG(); | |
119 | if (get_u32(&bt.tq, *argv, 0)) | |
120 | invarg("invalid \"tq\" value\n", *argv); | |
121 | } else if (matches(*argv, "prop-seg") == 0) { | |
122 | NEXT_ARG(); | |
123 | if (get_u32(&bt.prop_seg, *argv, 0)) | |
124 | invarg("invalid \"prop-seg\" value\n", *argv); | |
125 | } else if (matches(*argv, "phase-seg1") == 0) { | |
126 | NEXT_ARG(); | |
127 | if (get_u32(&bt.phase_seg1, *argv, 0)) | |
128 | invarg("invalid \"phase-seg1\" value\n", *argv); | |
129 | } else if (matches(*argv, "phase-seg2") == 0) { | |
130 | NEXT_ARG(); | |
131 | if (get_u32(&bt.phase_seg2, *argv, 0)) | |
132 | invarg("invalid \"phase-seg2\" value\n", *argv); | |
133 | } else if (matches(*argv, "sjw") == 0) { | |
134 | NEXT_ARG(); | |
135 | if (get_u32(&bt.sjw, *argv, 0)) | |
136 | invarg("invalid \"sjw\" value\n", *argv); | |
137 | } else if (matches(*argv, "loopback") == 0) { | |
138 | NEXT_ARG(); | |
139 | set_ctrlmode("loopback", *argv, &cm, | |
140 | CAN_CTRLMODE_LOOPBACK); | |
141 | } else if (matches(*argv, "listen-only") == 0) { | |
142 | NEXT_ARG(); | |
143 | set_ctrlmode("listen-only", *argv, &cm, | |
144 | CAN_CTRLMODE_LISTENONLY); | |
145 | } else if (matches(*argv, "triple-sampling") == 0) { | |
146 | NEXT_ARG(); | |
147 | set_ctrlmode("triple-sampling", *argv, &cm, | |
148 | CAN_CTRLMODE_3_SAMPLES); | |
8a517946 WG |
149 | } else if (matches(*argv, "one-shot") == 0) { |
150 | NEXT_ARG(); | |
151 | set_ctrlmode("one-shot", *argv, &cm, | |
152 | CAN_CTRLMODE_ONE_SHOT); | |
153 | } else if (matches(*argv, "berr-reporting") == 0) { | |
154 | NEXT_ARG(); | |
155 | set_ctrlmode("berr-reporting", *argv, &cm, | |
156 | CAN_CTRLMODE_BERR_REPORTING); | |
5a204478 WG |
157 | } else if (matches(*argv, "restart") == 0) { |
158 | __u32 val = 1; | |
159 | ||
160 | addattr32(n, 1024, IFLA_CAN_RESTART, val); | |
161 | } else if (matches(*argv, "restart-ms") == 0) { | |
162 | __u32 val; | |
163 | ||
164 | NEXT_ARG(); | |
165 | if (get_u32(&val, *argv, 0)) | |
166 | invarg("invalid \"restart-ms\" value\n", *argv); | |
167 | addattr32(n, 1024, IFLA_CAN_RESTART_MS, val); | |
168 | } else if (matches(*argv, "help") == 0) { | |
169 | usage(); | |
170 | return -1; | |
171 | } else { | |
14645ec2 | 172 | fprintf(stderr, "can: unknown option \"%s\"\n", *argv); |
5a204478 WG |
173 | usage(); |
174 | return -1; | |
175 | } | |
176 | argc--, argv++; | |
177 | } | |
178 | ||
179 | if (bt.bitrate || bt.tq) | |
180 | addattr_l(n, 1024, IFLA_CAN_BITTIMING, &bt, sizeof(bt)); | |
181 | if (cm.mask) | |
182 | addattr_l(n, 1024, IFLA_CAN_CTRLMODE, &cm, sizeof(cm)); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static const char *can_state_names[] = { | |
188 | [CAN_STATE_ERROR_ACTIVE] = "ERROR-ACTIVE", | |
189 | [CAN_STATE_ERROR_WARNING] = "ERROR-WARNING", | |
190 | [CAN_STATE_ERROR_PASSIVE] = "ERROR-PASSIVE", | |
191 | [CAN_STATE_BUS_OFF] = "BUS-OFF", | |
192 | [CAN_STATE_STOPPED] = "STOPPED", | |
193 | [CAN_STATE_SLEEPING] = "SLEEPING" | |
194 | }; | |
195 | ||
196 | static void can_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
197 | { | |
198 | if (!tb) | |
199 | return; | |
200 | ||
201 | if (tb[IFLA_CAN_CTRLMODE]) { | |
202 | struct can_ctrlmode *cm = RTA_DATA(tb[IFLA_CAN_CTRLMODE]); | |
203 | ||
204 | if (cm->flags) | |
205 | print_ctrlmode(f, cm->flags); | |
206 | } | |
207 | ||
208 | if (tb[IFLA_CAN_STATE]) { | |
209 | int *state = RTA_DATA(tb[IFLA_CAN_STATE]); | |
210 | ||
211 | fprintf(f, "state %s ", *state <= CAN_STATE_MAX ? | |
212 | can_state_names[*state] : "UNKNOWN"); | |
213 | } | |
214 | ||
8a517946 WG |
215 | if (tb[IFLA_CAN_BERR_COUNTER]) { |
216 | struct can_berr_counter *bc = | |
217 | RTA_DATA(tb[IFLA_CAN_BERR_COUNTER]); | |
218 | ||
219 | fprintf(f, "(berr-counter tx %d rx %d) ", bc->txerr, bc->rxerr); | |
220 | } | |
221 | ||
5a204478 WG |
222 | if (tb[IFLA_CAN_RESTART_MS]) { |
223 | __u32 *restart_ms = RTA_DATA(tb[IFLA_CAN_RESTART_MS]); | |
224 | ||
225 | fprintf(f, "restart-ms %d ", *restart_ms); | |
226 | } | |
227 | ||
228 | if (tb[IFLA_CAN_BITTIMING]) { | |
229 | struct can_bittiming *bt = RTA_DATA(tb[IFLA_CAN_BITTIMING]); | |
230 | ||
231 | fprintf(f, "\n " | |
232 | "bitrate %d sample-point %.3f ", | |
233 | bt->bitrate, (float)bt->sample_point / 1000.); | |
234 | fprintf(f, "\n " | |
235 | "tq %d prop-seg %d phase-seg1 %d phase-seg2 %d sjw %d", | |
236 | bt->tq, bt->prop_seg, bt->phase_seg1, bt->phase_seg2, | |
237 | bt->sjw); | |
238 | } | |
239 | ||
240 | if (tb[IFLA_CAN_BITTIMING_CONST]) { | |
241 | struct can_bittiming_const *btc = | |
242 | RTA_DATA(tb[IFLA_CAN_BITTIMING_CONST]); | |
243 | ||
244 | fprintf(f, "\n " | |
245 | "%s: tseg1 %d..%d tseg2 %d..%d " | |
246 | "sjw 1..%d brp %d..%d brp-inc %d", | |
247 | btc->name, btc->tseg1_min, btc->tseg1_max, | |
248 | btc->tseg2_min, btc->tseg2_max, btc->sjw_max, | |
249 | btc->brp_min, btc->brp_max, btc->brp_inc); | |
250 | } | |
251 | ||
252 | if (tb[IFLA_CAN_CLOCK]) { | |
253 | struct can_clock *clock = RTA_DATA(tb[IFLA_CAN_CLOCK]); | |
254 | ||
255 | fprintf(f, "\n clock %d", clock->freq); | |
256 | } | |
257 | ||
258 | } | |
259 | ||
260 | static void can_print_xstats(struct link_util *lu, | |
261 | FILE *f, struct rtattr *xstats) | |
262 | { | |
263 | struct can_device_stats *stats; | |
264 | ||
265 | if (xstats && RTA_PAYLOAD(xstats) == sizeof(*stats)) { | |
266 | stats = RTA_DATA(xstats); | |
267 | fprintf(f, "\n " | |
268 | "re-started bus-errors arbit-lost " | |
269 | "error-warn error-pass bus-off"); | |
270 | fprintf(f, "\n %-10d %-10d %-10d %-10d %-10d %-10d", | |
271 | stats->restarts, stats->bus_error, | |
272 | stats->arbitration_lost, stats->error_warning, | |
273 | stats->error_passive, stats->bus_off); | |
274 | } | |
275 | } | |
276 | ||
277 | struct link_util can_link_util = { | |
278 | .id = "can", | |
279 | .maxattr = IFLA_CAN_MAX, | |
280 | .parse_opt = can_parse_opt, | |
281 | .print_opt = can_print_opt, | |
282 | .print_xstats = can_print_xstats, | |
283 | }; |