1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
4 * All rights reserved.
5 */
6
7 #include <linux/bitfield.h>
8 #include "wlan_if.h"
9 #include "wlan.h"
10 #include "wlan_cfg.h"
11 #include "netdev.h"
12
13 enum cfg_cmd_type {
14 CFG_BYTE_CMD = 0,
15 CFG_HWORD_CMD = 1,
16 CFG_WORD_CMD = 2,
17 CFG_STR_CMD = 3,
18 CFG_BIN_CMD = 4
19 };
20
21 static const struct wilc_cfg_byte g_cfg_byte[] = {
22 {WID_STATUS, 0},
23 {WID_RSSI, 0},
24 {WID_LINKSPEED, 0},
25 {WID_NIL, 0}
26 };
27
28 static const struct wilc_cfg_hword g_cfg_hword[] = {
29 {WID_NIL, 0}
30 };
31
32 static const struct wilc_cfg_word g_cfg_word[] = {
33 {WID_FAILED_COUNT, 0},
34 {WID_RECEIVED_FRAGMENT_COUNT, 0},
35 {WID_SUCCESS_FRAME_COUNT, 0},
36 {WID_GET_INACTIVE_TIME, 0},
37 {WID_NIL, 0}
38
39 };
40
41 static const struct wilc_cfg_str g_cfg_str[] = {
42 {WID_FIRMWARE_VERSION, NULL},
43 {WID_MAC_ADDR, NULL},
44 {WID_ASSOC_RES_INFO, NULL},
45 {WID_NIL, NULL}
46 };
47
48 #define WILC_RESP_MSG_TYPE_CONFIG_REPLY 'R'
49 #define WILC_RESP_MSG_TYPE_STATUS_INFO 'I'
50 #define WILC_RESP_MSG_TYPE_NETWORK_INFO 'N'
51 #define WILC_RESP_MSG_TYPE_SCAN_COMPLETE 'S'
52
53 /********************************************
54 *
55 * Configuration Functions
56 *
57 ********************************************/
58
wilc_wlan_cfg_set_byte(u8 * frame,u32 offset,u16 id,u8 val8)59 static int wilc_wlan_cfg_set_byte(u8 *frame, u32 offset, u16 id, u8 val8)
60 {
61 if ((offset + 4) >= WILC_MAX_CFG_FRAME_SIZE)
62 return 0;
63
64 put_unaligned_le16(id, &frame[offset]);
65 put_unaligned_le16(1, &frame[offset + 2]);
66 frame[offset + 4] = val8;
67 return 5;
68 }
69
wilc_wlan_cfg_set_hword(u8 * frame,u32 offset,u16 id,u16 val16)70 static int wilc_wlan_cfg_set_hword(u8 *frame, u32 offset, u16 id, u16 val16)
71 {
72 if ((offset + 5) >= WILC_MAX_CFG_FRAME_SIZE)
73 return 0;
74
75 put_unaligned_le16(id, &frame[offset]);
76 put_unaligned_le16(2, &frame[offset + 2]);
77 put_unaligned_le16(val16, &frame[offset + 4]);
78
79 return 6;
80 }
81
wilc_wlan_cfg_set_word(u8 * frame,u32 offset,u16 id,u32 val32)82 static int wilc_wlan_cfg_set_word(u8 *frame, u32 offset, u16 id, u32 val32)
83 {
84 if ((offset + 7) >= WILC_MAX_CFG_FRAME_SIZE)
85 return 0;
86
87 put_unaligned_le16(id, &frame[offset]);
88 put_unaligned_le16(4, &frame[offset + 2]);
89 put_unaligned_le32(val32, &frame[offset + 4]);
90
91 return 8;
92 }
93
wilc_wlan_cfg_set_str(u8 * frame,u32 offset,u16 id,u8 * str,u32 size)94 static int wilc_wlan_cfg_set_str(u8 *frame, u32 offset, u16 id, u8 *str,
95 u32 size)
96 {
97 if ((offset + size + 4) >= WILC_MAX_CFG_FRAME_SIZE)
98 return 0;
99
100 put_unaligned_le16(id, &frame[offset]);
101 put_unaligned_le16(size, &frame[offset + 2]);
102 if (str && size != 0)
103 memcpy(&frame[offset + 4], str, size);
104
105 return (size + 4);
106 }
107
wilc_wlan_cfg_set_bin(u8 * frame,u32 offset,u16 id,u8 * b,u32 size)108 static int wilc_wlan_cfg_set_bin(u8 *frame, u32 offset, u16 id, u8 *b, u32 size)
109 {
110 u32 i;
111 u8 checksum = 0;
112
113 if ((offset + size + 5) >= WILC_MAX_CFG_FRAME_SIZE)
114 return 0;
115
116 put_unaligned_le16(id, &frame[offset]);
117 put_unaligned_le16(size, &frame[offset + 2]);
118
119 if ((b) && size != 0) {
120 memcpy(&frame[offset + 4], b, size);
121 for (i = 0; i < size; i++)
122 checksum += frame[offset + i + 4];
123 }
124
125 frame[offset + size + 4] = checksum;
126
127 return (size + 5);
128 }
129
130 /********************************************
131 *
132 * Configuration Response Functions
133 *
134 ********************************************/
135
wilc_wlan_parse_response_frame(struct wilc * wl,u8 * info,int size)136 static void wilc_wlan_parse_response_frame(struct wilc *wl, u8 *info, int size)
137 {
138 u16 wid;
139 u32 len = 0, i = 0;
140 struct wilc_cfg *cfg = &wl->cfg;
141
142 while (size > 0) {
143 i = 0;
144 wid = get_unaligned_le16(info);
145
146 switch (FIELD_GET(WILC_WID_TYPE, wid)) {
147 case WID_CHAR:
148 while (cfg->b[i].id != WID_NIL && cfg->b[i].id != wid)
149 i++;
150
151 if (cfg->b[i].id == wid)
152 cfg->b[i].val = info[4];
153
154 len = 3;
155 break;
156
157 case WID_SHORT:
158 while (cfg->hw[i].id != WID_NIL && cfg->hw[i].id != wid)
159 i++;
160
161 if (cfg->hw[i].id == wid)
162 cfg->hw[i].val = get_unaligned_le16(&info[4]);
163
164 len = 4;
165 break;
166
167 case WID_INT:
168 while (cfg->w[i].id != WID_NIL && cfg->w[i].id != wid)
169 i++;
170
171 if (cfg->w[i].id == wid)
172 cfg->w[i].val = get_unaligned_le32(&info[4]);
173
174 len = 6;
175 break;
176
177 case WID_STR:
178 while (cfg->s[i].id != WID_NIL && cfg->s[i].id != wid)
179 i++;
180
181 if (cfg->s[i].id == wid)
182 memcpy(cfg->s[i].str, &info[2], info[2] + 2);
183
184 len = 2 + info[2];
185 break;
186
187 default:
188 break;
189 }
190 size -= (2 + len);
191 info += (2 + len);
192 }
193 }
194
wilc_wlan_parse_info_frame(struct wilc * wl,u8 * info)195 static void wilc_wlan_parse_info_frame(struct wilc *wl, u8 *info)
196 {
197 u32 wid, len;
198
199 wid = get_unaligned_le16(info);
200
201 len = info[2];
202
203 if (len == 1 && wid == WID_STATUS) {
204 int i = 0;
205
206 while (wl->cfg.b[i].id != WID_NIL &&
207 wl->cfg.b[i].id != wid)
208 i++;
209
210 if (wl->cfg.b[i].id == wid)
211 wl->cfg.b[i].val = info[3];
212 }
213 }
214
215 /********************************************
216 *
217 * Configuration Exported Functions
218 *
219 ********************************************/
220
wilc_wlan_cfg_set_wid(u8 * frame,u32 offset,u16 id,u8 * buf,int size)221 int wilc_wlan_cfg_set_wid(u8 *frame, u32 offset, u16 id, u8 *buf, int size)
222 {
223 u8 type = FIELD_GET(WILC_WID_TYPE, id);
224 int ret = 0;
225
226 switch (type) {
227 case CFG_BYTE_CMD:
228 if (size >= 1)
229 ret = wilc_wlan_cfg_set_byte(frame, offset, id, *buf);
230 break;
231
232 case CFG_HWORD_CMD:
233 if (size >= 2)
234 ret = wilc_wlan_cfg_set_hword(frame, offset, id,
235 *((u16 *)buf));
236 break;
237
238 case CFG_WORD_CMD:
239 if (size >= 4)
240 ret = wilc_wlan_cfg_set_word(frame, offset, id,
241 *((u32 *)buf));
242 break;
243
244 case CFG_STR_CMD:
245 ret = wilc_wlan_cfg_set_str(frame, offset, id, buf, size);
246 break;
247
248 case CFG_BIN_CMD:
249 ret = wilc_wlan_cfg_set_bin(frame, offset, id, buf, size);
250 break;
251 }
252
253 return ret;
254 }
255
wilc_wlan_cfg_get_wid(u8 * frame,u32 offset,u16 id)256 int wilc_wlan_cfg_get_wid(u8 *frame, u32 offset, u16 id)
257 {
258 if ((offset + 2) >= WILC_MAX_CFG_FRAME_SIZE)
259 return 0;
260
261 put_unaligned_le16(id, &frame[offset]);
262
263 return 2;
264 }
265
wilc_wlan_cfg_get_val(struct wilc * wl,u16 wid,u8 * buffer,u32 buffer_size)266 int wilc_wlan_cfg_get_val(struct wilc *wl, u16 wid, u8 *buffer,
267 u32 buffer_size)
268 {
269 u8 type = FIELD_GET(WILC_WID_TYPE, wid);
270 int i, ret = 0;
271 struct wilc_cfg *cfg = &wl->cfg;
272
273 i = 0;
274 if (type == CFG_BYTE_CMD) {
275 while (cfg->b[i].id != WID_NIL && cfg->b[i].id != wid)
276 i++;
277
278 if (cfg->b[i].id == wid) {
279 memcpy(buffer, &cfg->b[i].val, 1);
280 ret = 1;
281 }
282 } else if (type == CFG_HWORD_CMD) {
283 while (cfg->hw[i].id != WID_NIL && cfg->hw[i].id != wid)
284 i++;
285
286 if (cfg->hw[i].id == wid) {
287 memcpy(buffer, &cfg->hw[i].val, 2);
288 ret = 2;
289 }
290 } else if (type == CFG_WORD_CMD) {
291 while (cfg->w[i].id != WID_NIL && cfg->w[i].id != wid)
292 i++;
293
294 if (cfg->w[i].id == wid) {
295 memcpy(buffer, &cfg->w[i].val, 4);
296 ret = 4;
297 }
298 } else if (type == CFG_STR_CMD) {
299 while (cfg->s[i].id != WID_NIL && cfg->s[i].id != wid)
300 i++;
301
302 if (cfg->s[i].id == wid) {
303 u16 size = get_unaligned_le16(cfg->s[i].str);
304
305 if (buffer_size >= size) {
306 memcpy(buffer, &cfg->s[i].str[2], size);
307 ret = size;
308 }
309 }
310 }
311 return ret;
312 }
313
wilc_wlan_cfg_indicate_rx(struct wilc * wilc,u8 * frame,int size,struct wilc_cfg_rsp * rsp)314 void wilc_wlan_cfg_indicate_rx(struct wilc *wilc, u8 *frame, int size,
315 struct wilc_cfg_rsp *rsp)
316 {
317 u8 msg_type;
318 u8 msg_id;
319
320 msg_type = frame[0];
321 msg_id = frame[1]; /* seq no */
322 frame += 4;
323 size -= 4;
324 rsp->type = 0;
325
326 switch (msg_type) {
327 case WILC_RESP_MSG_TYPE_CONFIG_REPLY:
328 wilc_wlan_parse_response_frame(wilc, frame, size);
329 rsp->type = WILC_CFG_RSP;
330 rsp->seq_no = msg_id;
331 break;
332
333 case WILC_RESP_MSG_TYPE_STATUS_INFO:
334 wilc_wlan_parse_info_frame(wilc, frame);
335 rsp->type = WILC_CFG_RSP_STATUS;
336 rsp->seq_no = msg_id;
337 /* call host interface info parse as well */
338 wilc_gnrl_async_info_received(wilc, frame - 4, size + 4);
339 break;
340
341 case WILC_RESP_MSG_TYPE_NETWORK_INFO:
342 wilc_network_info_received(wilc, frame - 4, size + 4);
343 break;
344
345 case WILC_RESP_MSG_TYPE_SCAN_COMPLETE:
346 wilc_scan_complete_received(wilc, frame - 4, size + 4);
347 break;
348
349 default:
350 rsp->seq_no = msg_id;
351 break;
352 }
353 }
354
wilc_wlan_cfg_init(struct wilc * wl)355 int wilc_wlan_cfg_init(struct wilc *wl)
356 {
357 struct wilc_cfg_str_vals *str_vals;
358 int i = 0;
359
360 wl->cfg.b = kmemdup(g_cfg_byte, sizeof(g_cfg_byte), GFP_KERNEL);
361 if (!wl->cfg.b)
362 return -ENOMEM;
363
364 wl->cfg.hw = kmemdup(g_cfg_hword, sizeof(g_cfg_hword), GFP_KERNEL);
365 if (!wl->cfg.hw)
366 goto out_b;
367
368 wl->cfg.w = kmemdup(g_cfg_word, sizeof(g_cfg_word), GFP_KERNEL);
369 if (!wl->cfg.w)
370 goto out_hw;
371
372 wl->cfg.s = kmemdup(g_cfg_str, sizeof(g_cfg_str), GFP_KERNEL);
373 if (!wl->cfg.s)
374 goto out_w;
375
376 str_vals = kzalloc(sizeof(*str_vals), GFP_KERNEL);
377 if (!str_vals)
378 goto out_s;
379
380 wl->cfg.str_vals = str_vals;
381 /* store the string cfg parameters */
382 wl->cfg.s[i].id = WID_FIRMWARE_VERSION;
383 wl->cfg.s[i].str = str_vals->firmware_version;
384 i++;
385 wl->cfg.s[i].id = WID_MAC_ADDR;
386 wl->cfg.s[i].str = str_vals->mac_address;
387 i++;
388 wl->cfg.s[i].id = WID_ASSOC_RES_INFO;
389 wl->cfg.s[i].str = str_vals->assoc_rsp;
390 i++;
391 wl->cfg.s[i].id = WID_NIL;
392 wl->cfg.s[i].str = NULL;
393 return 0;
394
395 out_s:
396 kfree(wl->cfg.s);
397 out_w:
398 kfree(wl->cfg.w);
399 out_hw:
400 kfree(wl->cfg.hw);
401 out_b:
402 kfree(wl->cfg.b);
403 return -ENOMEM;
404 }
405
wilc_wlan_cfg_deinit(struct wilc * wl)406 void wilc_wlan_cfg_deinit(struct wilc *wl)
407 {
408 kfree(wl->cfg.b);
409 kfree(wl->cfg.hw);
410 kfree(wl->cfg.w);
411 kfree(wl->cfg.s);
412 kfree(wl->cfg.str_vals);
413 }
414
