wlan_cfg.c

  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, 0, NULL},
 45	{WID_MAC_ADDR, 0, NULL},
 46	{WID_ASSOC_RES_INFO, 0, NULL},
 47	{WID_NIL, 0, 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			len = 3;
151			if (len + 2  > size)
152				return;
153
154			while (cfg->b[i].id != WID_NIL && cfg->b[i].id != wid)
155				i++;
156
157			if (cfg->b[i].id == wid)
158				cfg->b[i].val = info[4];
159
160			break;
161
162		case WID_SHORT:
163			len = 4;
164			if (len + 2  > size)
165				return;
166
167			while (cfg->hw[i].id != WID_NIL && cfg->hw[i].id != wid)
168				i++;
169
170			if (cfg->hw[i].id == wid)
171				cfg->hw[i].val = get_unaligned_le16(&info[4]);
172
173			break;
174
175		case WID_INT:
176			len = 6;
177			if (len + 2  > size)
178				return;
179
180			while (cfg->w[i].id != WID_NIL && cfg->w[i].id != wid)
181				i++;
182
183			if (cfg->w[i].id == wid)
184				cfg->w[i].val = get_unaligned_le32(&info[4]);
185
186			break;
187
188		case WID_STR:
189			len = 2 + get_unaligned_le16(&info[2]);
190
191			while (cfg->s[i].id != WID_NIL && cfg->s[i].id != wid)
192				i++;
193
194			if (cfg->s[i].id == wid) {
195				if (len > cfg->s[i].len || (len + 2  > size))
196					return;
197
198				memcpy(cfg->s[i].str, &info[2],
199				       len);
200			}
201
202			break;
203
204		default:
205			break;
206		}
207		size -= (2 + len);
208		info += (2 + len);
209	}
210}
211
212static void wilc_wlan_parse_info_frame(struct wilc *wl, u8 *info)
213{
214	u32 wid, len;
215
216	wid = get_unaligned_le16(info);
217
218	len = info[2];
219
220	if (len == 1 && wid == WID_STATUS) {
221		int i = 0;
222
223		while (wl->cfg.b[i].id != WID_NIL &&
224		       wl->cfg.b[i].id != wid)
225			i++;
226
227		if (wl->cfg.b[i].id == wid)
228			wl->cfg.b[i].val = info[3];
229	}
230}
231
232/********************************************
233 *
234 *      Configuration Exported Functions
235 *
236 ********************************************/
237
238int wilc_wlan_cfg_set_wid(u8 *frame, u32 offset, u16 id, u8 *buf, int size)
239{
240	u8 type = FIELD_GET(WILC_WID_TYPE, id);
241	int ret = 0;
242
243	switch (type) {
244	case CFG_BYTE_CMD:
245		if (size >= 1)
246			ret = wilc_wlan_cfg_set_byte(frame, offset, id, *buf);
247		break;
248
249	case CFG_HWORD_CMD:
250		if (size >= 2)
251			ret = wilc_wlan_cfg_set_hword(frame, offset, id,
252						      *((u16 *)buf));
253		break;
254
255	case CFG_WORD_CMD:
256		if (size >= 4)
257			ret = wilc_wlan_cfg_set_word(frame, offset, id,
258						     *((u32 *)buf));
259		break;
260
261	case CFG_STR_CMD:
262		ret = wilc_wlan_cfg_set_str(frame, offset, id, buf, size);
263		break;
264
265	case CFG_BIN_CMD:
266		ret = wilc_wlan_cfg_set_bin(frame, offset, id, buf, size);
267		break;
268	}
269
270	return ret;
271}
272
273int wilc_wlan_cfg_get_wid(u8 *frame, u32 offset, u16 id)
274{
275	if ((offset + 2) >= WILC_MAX_CFG_FRAME_SIZE)
276		return 0;
277
278	put_unaligned_le16(id, &frame[offset]);
279
280	return 2;
281}
282
283int wilc_wlan_cfg_get_val(struct wilc *wl, u16 wid, u8 *buffer,
284			  u32 buffer_size)
285{
286	u8 type = FIELD_GET(WILC_WID_TYPE, wid);
287	int i, ret = 0;
288	struct wilc_cfg *cfg = &wl->cfg;
289
290	i = 0;
291	if (type == CFG_BYTE_CMD) {
292		while (cfg->b[i].id != WID_NIL && cfg->b[i].id != wid)
293			i++;
294
295		if (cfg->b[i].id == wid) {
296			memcpy(buffer, &cfg->b[i].val, 1);
297			ret = 1;
298		}
299	} else if (type == CFG_HWORD_CMD) {
300		while (cfg->hw[i].id != WID_NIL && cfg->hw[i].id != wid)
301			i++;
302
303		if (cfg->hw[i].id == wid) {
304			memcpy(buffer, &cfg->hw[i].val, 2);
305			ret = 2;
306		}
307	} else if (type == CFG_WORD_CMD) {
308		while (cfg->w[i].id != WID_NIL && cfg->w[i].id != wid)
309			i++;
310
311		if (cfg->w[i].id == wid) {
312			memcpy(buffer, &cfg->w[i].val, 4);
313			ret = 4;
314		}
315	} else if (type == CFG_STR_CMD) {
316		while (cfg->s[i].id != WID_NIL && cfg->s[i].id != wid)
317			i++;
318
319		if (cfg->s[i].id == wid) {
320			u16 size = get_unaligned_le16(cfg->s[i].str);
321
322			if (buffer_size >= size) {
323				memcpy(buffer, &cfg->s[i].str[2], size);
324				ret = size;
325			}
326		}
327	}
328	return ret;
329}
330
331void wilc_wlan_cfg_indicate_rx(struct wilc *wilc, u8 *frame, int size,
332			       struct wilc_cfg_rsp *rsp)
333{
334	u8 msg_type;
335	u8 msg_id;
336
337	msg_type = frame[0];
338	msg_id = frame[1];      /* seq no */
339	frame += 4;
340	size -= 4;
341	rsp->type = 0;
342
343	switch (msg_type) {
344	case WILC_RESP_MSG_TYPE_CONFIG_REPLY:
345		wilc_wlan_parse_response_frame(wilc, frame, size);
346		rsp->type = WILC_CFG_RSP;
347		rsp->seq_no = msg_id;
348		break;
349
350	case WILC_RESP_MSG_TYPE_STATUS_INFO:
351		wilc_wlan_parse_info_frame(wilc, frame);
352		rsp->type = WILC_CFG_RSP_STATUS;
353		rsp->seq_no = msg_id;
354		/* call host interface info parse as well */
355		wilc_gnrl_async_info_received(wilc, frame - 4, size + 4);
356		break;
357
358	case WILC_RESP_MSG_TYPE_NETWORK_INFO:
359		wilc_network_info_received(wilc, frame - 4, size + 4);
360		break;
361
362	case WILC_RESP_MSG_TYPE_SCAN_COMPLETE:
363		wilc_scan_complete_received(wilc, frame - 4, size + 4);
364		break;
365
366	default:
367		rsp->seq_no = msg_id;
368		break;
369	}
370}
371
372int wilc_wlan_cfg_init(struct wilc *wl)
373{
374	struct wilc_cfg_str_vals *str_vals;
375	int i = 0;
376
377	wl->cfg.b = kmemdup(g_cfg_byte, sizeof(g_cfg_byte), GFP_KERNEL);
378	if (!wl->cfg.b)
379		return -ENOMEM;
380
381	wl->cfg.hw = kmemdup(g_cfg_hword, sizeof(g_cfg_hword), GFP_KERNEL);
382	if (!wl->cfg.hw)
383		goto out_b;
384
385	wl->cfg.w = kmemdup(g_cfg_word, sizeof(g_cfg_word), GFP_KERNEL);
386	if (!wl->cfg.w)
387		goto out_hw;
388
389	wl->cfg.s = kmemdup(g_cfg_str, sizeof(g_cfg_str), GFP_KERNEL);
390	if (!wl->cfg.s)
391		goto out_w;
392
393	str_vals = kzalloc(sizeof(*str_vals), GFP_KERNEL);
394	if (!str_vals)
395		goto out_s;
396
397	wl->cfg.str_vals = str_vals;
398	/* store the string cfg parameters */
399	wl->cfg.s[i].id = WID_FIRMWARE_VERSION;
400	wl->cfg.s[i].str = str_vals->firmware_version;
401	wl->cfg.s[i].len = sizeof(str_vals->firmware_version);
402	i++;
403	wl->cfg.s[i].id = WID_MAC_ADDR;
404	wl->cfg.s[i].str = str_vals->mac_address;
405	wl->cfg.s[i].len = sizeof(str_vals->mac_address);
406	i++;
407	wl->cfg.s[i].id = WID_ASSOC_RES_INFO;
408	wl->cfg.s[i].str = str_vals->assoc_rsp;
409	wl->cfg.s[i].len = sizeof(str_vals->assoc_rsp);
410	i++;
411	wl->cfg.s[i].id = WID_NIL;
412	wl->cfg.s[i].str = NULL;
413	return 0;
414
415out_s:
416	kfree(wl->cfg.s);
417out_w:
418	kfree(wl->cfg.w);
419out_hw:
420	kfree(wl->cfg.hw);
421out_b:
422	kfree(wl->cfg.b);
423	return -ENOMEM;
424}
425
426void wilc_wlan_cfg_deinit(struct wilc *wl)
427{
428	kfree(wl->cfg.b);
429	kfree(wl->cfg.hw);
430	kfree(wl->cfg.w);
431	kfree(wl->cfg.s);
432	kfree(wl->cfg.str_vals);
433}