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
13enum 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
21static const struct wilc_cfg_byte g_cfg_byte[] = {
22	{WID_STATUS, 0},
23	{WID_RSSI, 0},
24	{WID_LINKSPEED, 0},
25	{WID_TX_POWER, 0},
26	{WID_WOWLAN_TRIGGER, 0},
27	{WID_NIL, 0}
28};
29
30static const struct wilc_cfg_hword g_cfg_hword[] = {
31	{WID_NIL, 0}
32};
33
34static const struct wilc_cfg_word g_cfg_word[] = {
35	{WID_FAILED_COUNT, 0},
36	{WID_RECEIVED_FRAGMENT_COUNT, 0},
37	{WID_SUCCESS_FRAME_COUNT, 0},
38	{WID_GET_INACTIVE_TIME, 0},
39	{WID_NIL, 0}
40
41};
42
43static const struct wilc_cfg_str g_cfg_str[] = {
44	{WID_FIRMWARE_VERSION, NULL},
45	{WID_MAC_ADDR, NULL},
46	{WID_ASSOC_RES_INFO, NULL},
47	{WID_NIL, NULL}
48};
49
50#define WILC_RESP_MSG_TYPE_CONFIG_REPLY		'R'
51#define WILC_RESP_MSG_TYPE_STATUS_INFO		'I'
52#define WILC_RESP_MSG_TYPE_NETWORK_INFO		'N'
53#define WILC_RESP_MSG_TYPE_SCAN_COMPLETE	'S'
54
55/********************************************
56 *
57 *      Configuration Functions
58 *
59 ********************************************/
60
61static int wilc_wlan_cfg_set_byte(u8 *frame, u32 offset, u16 id, u8 val8)
62{
63	if ((offset + 4) >= WILC_MAX_CFG_FRAME_SIZE)
64		return 0;
65
66	put_unaligned_le16(id, &frame[offset]);
67	put_unaligned_le16(1, &frame[offset + 2]);
68	frame[offset + 4] = val8;
69	return 5;
70}
71
72static int wilc_wlan_cfg_set_hword(u8 *frame, u32 offset, u16 id, u16 val16)
73{
74	if ((offset + 5) >= WILC_MAX_CFG_FRAME_SIZE)
75		return 0;
76
77	put_unaligned_le16(id, &frame[offset]);
78	put_unaligned_le16(2, &frame[offset + 2]);
79	put_unaligned_le16(val16, &frame[offset + 4]);
80
81	return 6;
82}
83
84static int wilc_wlan_cfg_set_word(u8 *frame, u32 offset, u16 id, u32 val32)
85{
86	if ((offset + 7) >= WILC_MAX_CFG_FRAME_SIZE)
87		return 0;
88
89	put_unaligned_le16(id, &frame[offset]);
90	put_unaligned_le16(4, &frame[offset + 2]);
91	put_unaligned_le32(val32, &frame[offset + 4]);
92
93	return 8;
94}
95
96static int wilc_wlan_cfg_set_str(u8 *frame, u32 offset, u16 id, u8 *str,
97				 u32 size)
98{
99	if ((offset + size + 4) >= WILC_MAX_CFG_FRAME_SIZE)
100		return 0;
101
102	put_unaligned_le16(id, &frame[offset]);
103	put_unaligned_le16(size, &frame[offset + 2]);
104	if (str && size != 0)
105		memcpy(&frame[offset + 4], str, size);
106
107	return (size + 4);
108}
109
110static int wilc_wlan_cfg_set_bin(u8 *frame, u32 offset, u16 id, u8 *b, u32 size)
111{
112	u32 i;
113	u8 checksum = 0;
114
115	if ((offset + size + 5) >= WILC_MAX_CFG_FRAME_SIZE)
116		return 0;
117
118	put_unaligned_le16(id, &frame[offset]);
119	put_unaligned_le16(size, &frame[offset + 2]);
120
121	if ((b) && size != 0) {
122		memcpy(&frame[offset + 4], b, size);
123		for (i = 0; i < size; i++)
124			checksum += frame[offset + i + 4];
125	}
126
127	frame[offset + size + 4] = checksum;
128
129	return (size + 5);
130}
131
132/********************************************
133 *
134 *      Configuration Response Functions
135 *
136 ********************************************/
137
138static void wilc_wlan_parse_response_frame(struct wilc *wl, u8 *info, int size)
139{
140	u16 wid;
141	u32 len = 0, i = 0;
142	struct wilc_cfg *cfg = &wl->cfg;
143
144	while (size > 0) {
145		i = 0;
146		wid = get_unaligned_le16(info);
147
148		switch (FIELD_GET(WILC_WID_TYPE, wid)) {
149		case WID_CHAR:
150			while (cfg->b[i].id != WID_NIL && cfg->b[i].id != wid)
151				i++;
152
153			if (cfg->b[i].id == wid)
154				cfg->b[i].val = info[4];
155
156			len = 3;
157			break;
158
159		case WID_SHORT:
160			while (cfg->hw[i].id != WID_NIL && cfg->hw[i].id != wid)
161				i++;
162
163			if (cfg->hw[i].id == wid)
164				cfg->hw[i].val = get_unaligned_le16(&info[4]);
165
166			len = 4;
167			break;
168
169		case WID_INT:
170			while (cfg->w[i].id != WID_NIL && cfg->w[i].id != wid)
171				i++;
172
173			if (cfg->w[i].id == wid)
174				cfg->w[i].val = get_unaligned_le32(&info[4]);
175
176			len = 6;
177			break;
178
179		case WID_STR:
180			while (cfg->s[i].id != WID_NIL && cfg->s[i].id != wid)
181				i++;
182
183			if (cfg->s[i].id == wid)
184				memcpy(cfg->s[i].str, &info[2],
185				       get_unaligned_le16(&info[2]) + 2);
186
187			len = 2 + get_unaligned_le16(&info[2]);
188			break;
189
190		default:
191			break;
192		}
193		size -= (2 + len);
194		info += (2 + len);
195	}
196}
197
198static void wilc_wlan_parse_info_frame(struct wilc *wl, u8 *info)
199{
200	u32 wid, len;
201
202	wid = get_unaligned_le16(info);
203
204	len = info[2];
205
206	if (len == 1 && wid == WID_STATUS) {
207		int i = 0;
208
209		while (wl->cfg.b[i].id != WID_NIL &&
210		       wl->cfg.b[i].id != wid)
211			i++;
212
213		if (wl->cfg.b[i].id == wid)
214			wl->cfg.b[i].val = info[3];
215	}
216}
217
218/********************************************
219 *
220 *      Configuration Exported Functions
221 *
222 ********************************************/
223
224int wilc_wlan_cfg_set_wid(u8 *frame, u32 offset, u16 id, u8 *buf, int size)
225{
226	u8 type = FIELD_GET(WILC_WID_TYPE, id);
227	int ret = 0;
228
229	switch (type) {
230	case CFG_BYTE_CMD:
231		if (size >= 1)
232			ret = wilc_wlan_cfg_set_byte(frame, offset, id, *buf);
233		break;
234
235	case CFG_HWORD_CMD:
236		if (size >= 2)
237			ret = wilc_wlan_cfg_set_hword(frame, offset, id,
238						      *((u16 *)buf));
239		break;
240
241	case CFG_WORD_CMD:
242		if (size >= 4)
243			ret = wilc_wlan_cfg_set_word(frame, offset, id,
244						     *((u32 *)buf));
245		break;
246
247	case CFG_STR_CMD:
248		ret = wilc_wlan_cfg_set_str(frame, offset, id, buf, size);
249		break;
250
251	case CFG_BIN_CMD:
252		ret = wilc_wlan_cfg_set_bin(frame, offset, id, buf, size);
253		break;
254	}
255
256	return ret;
257}
258
259int wilc_wlan_cfg_get_wid(u8 *frame, u32 offset, u16 id)
260{
261	if ((offset + 2) >= WILC_MAX_CFG_FRAME_SIZE)
262		return 0;
263
264	put_unaligned_le16(id, &frame[offset]);
265
266	return 2;
267}
268
269int wilc_wlan_cfg_get_val(struct wilc *wl, u16 wid, u8 *buffer,
270			  u32 buffer_size)
271{
272	u8 type = FIELD_GET(WILC_WID_TYPE, wid);
273	int i, ret = 0;
274	struct wilc_cfg *cfg = &wl->cfg;
275
276	i = 0;
277	if (type == CFG_BYTE_CMD) {
278		while (cfg->b[i].id != WID_NIL && cfg->b[i].id != wid)
279			i++;
280
281		if (cfg->b[i].id == wid) {
282			memcpy(buffer, &cfg->b[i].val, 1);
283			ret = 1;
284		}
285	} else if (type == CFG_HWORD_CMD) {
286		while (cfg->hw[i].id != WID_NIL && cfg->hw[i].id != wid)
287			i++;
288
289		if (cfg->hw[i].id == wid) {
290			memcpy(buffer, &cfg->hw[i].val, 2);
291			ret = 2;
292		}
293	} else if (type == CFG_WORD_CMD) {
294		while (cfg->w[i].id != WID_NIL && cfg->w[i].id != wid)
295			i++;
296
297		if (cfg->w[i].id == wid) {
298			memcpy(buffer, &cfg->w[i].val, 4);
299			ret = 4;
300		}
301	} else if (type == CFG_STR_CMD) {
302		while (cfg->s[i].id != WID_NIL && cfg->s[i].id != wid)
303			i++;
304
305		if (cfg->s[i].id == wid) {
306			u16 size = get_unaligned_le16(cfg->s[i].str);
307
308			if (buffer_size >= size) {
309				memcpy(buffer, &cfg->s[i].str[2], size);
310				ret = size;
311			}
312		}
313	}
314	return ret;
315}
316
317void wilc_wlan_cfg_indicate_rx(struct wilc *wilc, u8 *frame, int size,
318			       struct wilc_cfg_rsp *rsp)
319{
320	u8 msg_type;
321	u8 msg_id;
322
323	msg_type = frame[0];
324	msg_id = frame[1];      /* seq no */
325	frame += 4;
326	size -= 4;
327	rsp->type = 0;
328
329	switch (msg_type) {
330	case WILC_RESP_MSG_TYPE_CONFIG_REPLY:
331		wilc_wlan_parse_response_frame(wilc, frame, size);
332		rsp->type = WILC_CFG_RSP;
333		rsp->seq_no = msg_id;
334		break;
335
336	case WILC_RESP_MSG_TYPE_STATUS_INFO:
337		wilc_wlan_parse_info_frame(wilc, frame);
338		rsp->type = WILC_CFG_RSP_STATUS;
339		rsp->seq_no = msg_id;
340		/* call host interface info parse as well */
341		wilc_gnrl_async_info_received(wilc, frame - 4, size + 4);
342		break;
343
344	case WILC_RESP_MSG_TYPE_NETWORK_INFO:
345		wilc_network_info_received(wilc, frame - 4, size + 4);
346		break;
347
348	case WILC_RESP_MSG_TYPE_SCAN_COMPLETE:
349		wilc_scan_complete_received(wilc, frame - 4, size + 4);
350		break;
351
352	default:
353		rsp->seq_no = msg_id;
354		break;
355	}
356}
357
358int wilc_wlan_cfg_init(struct wilc *wl)
359{
360	struct wilc_cfg_str_vals *str_vals;
361	int i = 0;
362
363	wl->cfg.b = kmemdup(g_cfg_byte, sizeof(g_cfg_byte), GFP_KERNEL);
364	if (!wl->cfg.b)
365		return -ENOMEM;
366
367	wl->cfg.hw = kmemdup(g_cfg_hword, sizeof(g_cfg_hword), GFP_KERNEL);
368	if (!wl->cfg.hw)
369		goto out_b;
370
371	wl->cfg.w = kmemdup(g_cfg_word, sizeof(g_cfg_word), GFP_KERNEL);
372	if (!wl->cfg.w)
373		goto out_hw;
374
375	wl->cfg.s = kmemdup(g_cfg_str, sizeof(g_cfg_str), GFP_KERNEL);
376	if (!wl->cfg.s)
377		goto out_w;
378
379	str_vals = kzalloc(sizeof(*str_vals), GFP_KERNEL);
380	if (!str_vals)
381		goto out_s;
382
383	wl->cfg.str_vals = str_vals;
384	/* store the string cfg parameters */
385	wl->cfg.s[i].id = WID_FIRMWARE_VERSION;
386	wl->cfg.s[i].str = str_vals->firmware_version;
387	i++;
388	wl->cfg.s[i].id = WID_MAC_ADDR;
389	wl->cfg.s[i].str = str_vals->mac_address;
390	i++;
391	wl->cfg.s[i].id = WID_ASSOC_RES_INFO;
392	wl->cfg.s[i].str = str_vals->assoc_rsp;
393	i++;
394	wl->cfg.s[i].id = WID_NIL;
395	wl->cfg.s[i].str = NULL;
396	return 0;
397
398out_s:
399	kfree(wl->cfg.s);
400out_w:
401	kfree(wl->cfg.w);
402out_hw:
403	kfree(wl->cfg.hw);
404out_b:
405	kfree(wl->cfg.b);
406	return -ENOMEM;
407}
408
409void wilc_wlan_cfg_deinit(struct wilc *wl)
410{
411	kfree(wl->cfg.b);
412	kfree(wl->cfg.hw);
413	kfree(wl->cfg.w);
414	kfree(wl->cfg.s);
415	kfree(wl->cfg.str_vals);
416}
417