xref: /OK3568_Linux_fs/kernel/drivers/net/wireless/rockchip_wlan/rtl8723bs/hal/btc/halbtc8723d1ant.h (revision 4882a59341e53eb6f0b4789bf948001014eff981)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /******************************************************************************
3  *
4  * Copyright(c) 2016 - 2017 Realtek Corporation.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of version 2 of the GNU General Public License as
8  * published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13  * more details.
14  *
15  *****************************************************************************/
16 
17 
18 #if (BT_SUPPORT == 1 && COEX_SUPPORT == 1)
19 
20 #if (RTL8723D_SUPPORT == 1)
21 
22 /* *******************************************
23  * The following is for 8723D 1ANT BT Co-exist definition
24  * ******************************************* */
25 #define	BT_8723D_1ANT_COEX_DBG					0
26 #define	BT_AUTO_REPORT_ONLY_8723D_1ANT				1
27 
28 #define	BT_INFO_8723D_1ANT_B_FTP						BIT(7)
29 #define	BT_INFO_8723D_1ANT_B_A2DP					BIT(6)
30 #define	BT_INFO_8723D_1ANT_B_HID						BIT(5)
31 #define	BT_INFO_8723D_1ANT_B_SCO_BUSY				BIT(4)
32 #define	BT_INFO_8723D_1ANT_B_ACL_BUSY				BIT(3)
33 #define	BT_INFO_8723D_1ANT_B_INQ_PAGE				BIT(2)
34 #define	BT_INFO_8723D_1ANT_B_SCO_ESCO				BIT(1)
35 #define	BT_INFO_8723D_1ANT_B_CONNECTION				BIT(0)
36 
37 #define	BT_INFO_8723D_1ANT_A2DP_BASIC_RATE(_BT_INFO_EXT_)	\
38 	(((_BT_INFO_EXT_&BIT(0))) ? TRUE : FALSE)
39 
40 #define	BTC_RSSI_COEX_THRESH_TOL_8723D_1ANT		2
41 
42 #define  BT_8723D_1ANT_WIFI_NOISY_THRESH							30   /* max: 255 */
43 #define  BT_8723D_1ANT_DEFAULT_ISOLATION						15	 /*  unit: dB */
44 
45 
46 /* for Antenna detection */
47 #define	BT_8723D_1ANT_ANTDET_PSDTHRES_BACKGROUND					50
48 #define	BT_8723D_1ANT_ANTDET_PSDTHRES_2ANT_BADISOLATION				70
49 #define	BT_8723D_1ANT_ANTDET_PSDTHRES_2ANT_GOODISOLATION			55
50 #define	BT_8723D_1ANT_ANTDET_PSDTHRES_1ANT							35
51 #define	BT_8723D_1ANT_ANTDET_RETRY_INTERVAL							10	/* retry timer if ant det is fail, unit: second */
52 #define	BT_8723D_1ANT_ANTDET_SWEEPPOINT_DELAY							60000
53 #define	BT_8723D_1ANT_ANTDET_ENABLE									1
54 #define	BT_8723D_1ANT_ANTDET_BTTXTIME									100
55 #define	BT_8723D_1ANT_ANTDET_BTTXCHANNEL								39
56 #define	BT_8723D_1ANT_ANTDET_PSD_SWWEEPCOUNT						50
57 
58 #define	BT_8723D_1ANT_LTECOEX_INDIRECTREG_ACCESS_TIMEOUT		30000
59 
60 enum bt_8723d_1ant_signal_state {
61 	BT_8723D_1ANT_SIG_STA_SET_TO_LOW		= 0x0,
62 	BT_8723D_1ANT_SIG_STA_SET_BY_HW		= 0x0,
63 	BT_8723D_1ANT_SIG_STA_SET_TO_HIGH		= 0x1,
64 	BT_8723D_1ANT_SIG_STA_MAX
65 };
66 
67 enum bt_8723d_1ant_path_ctrl_owner {
68 	BT_8723D_1ANT_PCO_BTSIDE		= 0x0,
69 	BT_8723D_1ANT_PCO_WLSIDE	= 0x1,
70 	BT_8723D_1ANT_PCO_MAX
71 };
72 
73 enum bt_8723d_1ant_gnt_ctrl_type {
74 	BT_8723D_1ANT_GNT_TYPE_CTRL_BY_PTA		= 0x0,
75 	BT_8723D_1ANT_GNT_TYPE_CTRL_BY_SW		= 0x1,
76 	BT_8723D_1ANT_GNT_TYPE_MAX
77 };
78 
79 enum bt_8723d_1ant_gnt_ctrl_block {
80 	BT_8723D_1ANT_GNT_BLOCK_RFC_BB		= 0x0,
81 	BT_8723D_1ANT_GNT_BLOCK_RFC			= 0x1,
82 	BT_8723D_1ANT_GNT_BLOCK_BB			= 0x2,
83 	BT_8723D_1ANT_GNT_BLOCK_MAX
84 };
85 
86 enum bt_8723d_1ant_lte_coex_table_type {
87 	BT_8723D_1ANT_CTT_WL_VS_LTE			= 0x0,
88 	BT_8723D_1ANT_CTT_BT_VS_LTE			= 0x1,
89 	BT_8723D_1ANT_CTT_MAX
90 };
91 
92 enum bt_8723d_1ant_lte_break_table_type {
93 	BT_8723D_1ANT_LBTT_WL_BREAK_LTE			= 0x0,
94 	BT_8723D_1ANT_LBTT_BT_BREAK_LTE				= 0x1,
95 	BT_8723D_1ANT_LBTT_LTE_BREAK_WL			= 0x2,
96 	BT_8723D_1ANT_LBTT_LTE_BREAK_BT				= 0x3,
97 	BT_8723D_1ANT_LBTT_MAX
98 };
99 
100 enum bt_info_src_8723d_1ant {
101 	BT_INFO_SRC_8723D_1ANT_WIFI_FW			= 0x0,
102 	BT_INFO_SRC_8723D_1ANT_BT_RSP				= 0x1,
103 	BT_INFO_SRC_8723D_1ANT_BT_ACTIVE_SEND		= 0x2,
104 	BT_INFO_SRC_8723D_1ANT_MAX
105 };
106 
107 enum bt_8723d_1ant_bt_status {
108 	BT_8723D_1ANT_BT_STATUS_NON_CONNECTED_IDLE	= 0x0,
109 	BT_8723D_1ANT_BT_STATUS_CONNECTED_IDLE		= 0x1,
110 	BT_8723D_1ANT_BT_STATUS_INQ_PAGE				= 0x2,
111 	BT_8723D_1ANT_BT_STATUS_ACL_BUSY				= 0x3,
112 	BT_8723D_1ANT_BT_STATUS_SCO_BUSY				= 0x4,
113 	BT_8723D_1ANT_BT_STATUS_ACL_SCO_BUSY			= 0x5,
114 	BT_8723D_1ANT_BT_STATUS_MAX
115 };
116 
117 enum bt_8723d_1ant_wifi_status {
118 	BT_8723D_1ANT_WIFI_STATUS_NON_CONNECTED_IDLE				= 0x0,
119 	BT_8723D_1ANT_WIFI_STATUS_NON_CONNECTED_ASSO_AUTH_SCAN		= 0x1,
120 	BT_8723D_1ANT_WIFI_STATUS_CONNECTED_SCAN					= 0x2,
121 	BT_8723D_1ANT_WIFI_STATUS_CONNECTED_SPECIFIC_PKT				= 0x3,
122 	BT_8723D_1ANT_WIFI_STATUS_CONNECTED_IDLE					= 0x4,
123 	BT_8723D_1ANT_WIFI_STATUS_CONNECTED_BUSY					= 0x5,
124 	BT_8723D_1ANT_WIFI_STATUS_MAX
125 };
126 
127 enum bt_8723d_1ant_coex_algo {
128 	BT_8723D_1ANT_COEX_ALGO_UNDEFINED			= 0x0,
129 	BT_8723D_1ANT_COEX_ALGO_SCO				= 0x1,
130 	BT_8723D_1ANT_COEX_ALGO_HID				= 0x2,
131 	BT_8723D_1ANT_COEX_ALGO_A2DP				= 0x3,
132 	BT_8723D_1ANT_COEX_ALGO_A2DP_PANHS		= 0x4,
133 	BT_8723D_1ANT_COEX_ALGO_PANEDR			= 0x5,
134 	BT_8723D_1ANT_COEX_ALGO_PANHS			= 0x6,
135 	BT_8723D_1ANT_COEX_ALGO_PANEDR_A2DP		= 0x7,
136 	BT_8723D_1ANT_COEX_ALGO_PANEDR_HID		= 0x8,
137 	BT_8723D_1ANT_COEX_ALGO_HID_A2DP_PANEDR	= 0x9,
138 	BT_8723D_1ANT_COEX_ALGO_HID_A2DP			= 0xa,
139 	BT_8723D_1ANT_COEX_ALGO_MAX				= 0xb,
140 };
141 
142 enum bt_8723d_1ant_phase {
143 	BT_8723D_1ANT_PHASE_COEX_INIT								= 0x0,
144 	BT_8723D_1ANT_PHASE_WLANONLY_INIT							= 0x1,
145 	BT_8723D_1ANT_PHASE_WLAN_OFF								= 0x2,
146 	BT_8723D_1ANT_PHASE_2G_RUNTIME								= 0x3,
147 	BT_8723D_1ANT_PHASE_5G_RUNTIME								= 0x4,
148 	BT_8723D_1ANT_PHASE_BTMPMODE								= 0x5,
149 	BT_8723D_1ANT_PHASE_ANTENNA_DET								= 0x6,
150 	BT_8723D_1ANT_PHASE_COEX_POWERON							= 0x7,
151 	BT_8723D_1ANT_PHASE_MAX
152 };
153 
154 enum bt_8723d_1ant_Scoreboard {
155 	BT_8723D_1ANT_SCOREBOARD_ACTIVE								= BIT(0),
156 	BT_8723D_1ANT_SCOREBOARD_ONOFF								= BIT(1),
157 	BT_8723D_1ANT_SCOREBOARD_SCAN								= BIT(2),
158 	BT_8723D_1ANT_SCOREBOARD_UNDERTEST							= BIT(3),
159 	BT_8723D_1ANT_SCOREBOARD_WLBUSY								= BIT(6)
160 };
161 
162 struct coex_dm_8723d_1ant {
163 	/* hw setting */
164 	u8		pre_ant_pos_type;
165 	u8		cur_ant_pos_type;
166 	/* fw mechanism */
167 	boolean		cur_ignore_wlan_act;
168 	boolean		pre_ignore_wlan_act;
169 	u8		pre_ps_tdma;
170 	u8		cur_ps_tdma;
171 	u8		ps_tdma_para[5];
172 	u8		ps_tdma_du_adj_type;
173 	boolean		pre_ps_tdma_on;
174 	boolean		cur_ps_tdma_on;
175 	boolean		pre_bt_auto_report;
176 	boolean		cur_bt_auto_report;
177 	u8		pre_lps;
178 	u8		cur_lps;
179 	u8		pre_rpwm;
180 	u8		cur_rpwm;
181 
182 	/* sw mechanism */
183 	boolean	pre_low_penalty_ra;
184 	boolean		cur_low_penalty_ra;
185 	u32		pre_val0x6c0;
186 	u32		cur_val0x6c0;
187 	u32		pre_val0x6c4;
188 	u32		cur_val0x6c4;
189 	u32		pre_val0x6c8;
190 	u32		cur_val0x6c8;
191 	u8		pre_val0x6cc;
192 	u8		cur_val0x6cc;
193 	boolean		limited_dig;
194 
195 	u32		backup_arfr_cnt1;	/* Auto Rate Fallback Retry cnt */
196 	u32		backup_arfr_cnt2;	/* Auto Rate Fallback Retry cnt */
197 	u16		backup_retry_limit;
198 	u8		backup_ampdu_max_time;
199 
200 	/* algorithm related */
201 	u8		pre_algorithm;
202 	u8		cur_algorithm;
203 	u8		bt_status;
204 	u8		wifi_chnl_info[3];
205 
206 	u32		pre_ra_mask;
207 	u32		cur_ra_mask;
208 	u8		pre_arfr_type;
209 	u8		cur_arfr_type;
210 	u8		pre_retry_limit_type;
211 	u8		cur_retry_limit_type;
212 	u8		pre_ampdu_time_type;
213 	u8		cur_ampdu_time_type;
214 	u32		arp_cnt;
215 
216 	u8		error_condition;
217 };
218 
219 struct coex_sta_8723d_1ant {
220 	boolean				bt_disabled;
221 	boolean				bt_link_exist;
222 	boolean				sco_exist;
223 	boolean				a2dp_exist;
224 	boolean				hid_exist;
225 	boolean				pan_exist;
226 	boolean				bt_hi_pri_link_exist;
227 	u8					num_of_profile;
228 
229 	boolean				under_lps;
230 	boolean				under_ips;
231 	u32					specific_pkt_period_cnt;
232 	u32					high_priority_tx;
233 	u32					high_priority_rx;
234 	u32					low_priority_tx;
235 	u32					low_priority_rx;
236 	boolean             is_hiPri_rx_overhead;
237 	s8					bt_rssi;
238 	boolean				bt_tx_rx_mask;
239 	u8					pre_bt_rssi_state;
240 	u8					pre_wifi_rssi_state[4];
241 	u8					bt_info_c2h[BT_INFO_SRC_8723D_1ANT_MAX][10];
242 	u32					bt_info_c2h_cnt[BT_INFO_SRC_8723D_1ANT_MAX];
243 	boolean				bt_whck_test;
244 	boolean				c2h_bt_inquiry_page;
245 	boolean				c2h_bt_remote_name_req;
246 	boolean				c2h_bt_page;				/* Add for win8.1 page out issue */
247 	boolean				wifi_is_high_pri_task;		/* Add for win8.1 page out issue */
248 	u8					bt_retry_cnt;
249 	u8					bt_info_ext;
250 	u8					bt_info_ext2;
251 	u32					pop_event_cnt;
252 	u8					scan_ap_num;
253 
254 	u32					crc_ok_cck;
255 	u32					crc_ok_11g;
256 	u32					crc_ok_11n;
257 	u32					crc_ok_11n_vht;
258 
259 	u32					crc_err_cck;
260 	u32					crc_err_11g;
261 	u32					crc_err_11n;
262 	u32					crc_err_11n_vht;
263 
264 	boolean				cck_lock;
265 	boolean				cck_lock_ever;
266 	boolean				cck_lock_warn;
267 
268 	u8					coex_table_type;
269 	boolean				force_lps_ctrl;
270 	boolean				concurrent_rx_mode_on;
271 
272 	u16					score_board;
273 	u8					isolation_btween_wb;   /* 0~ 50 */
274 
275 	u8					a2dp_bit_pool;
276 	u8					cut_version;
277 	boolean				acl_busy;
278 	boolean				bt_create_connection;
279 
280 	u32					bt_coex_supported_feature;
281 	u32					bt_coex_supported_version;
282 
283 	u8					bt_ble_scan_type;
284 	u32					bt_ble_scan_para[3];
285 
286 	boolean				run_time_state;
287 	boolean				freeze_coexrun_by_btinfo;
288 
289 	boolean				is_A2DP_3M;
290 	boolean				voice_over_HOGP;
291 	u8                  bt_info;
292 	boolean				is_autoslot;
293 	u8					forbidden_slot;
294 	u8					hid_busy_num;
295 	u8					hid_pair_cnt;
296 
297 	u32					cnt_RemoteNameReq;
298 	u32					cnt_setupLink;
299 	u32					cnt_ReInit;
300 	u32					cnt_IgnWlanAct;
301 	u32					cnt_Page;
302 	u32					cnt_RoleSwitch;
303 
304 	u16					bt_reg_vendor_ac;
305 	u16					bt_reg_vendor_ae;
306 
307 	boolean				is_setupLink;
308 	u8					wl_noisy_level;
309 	u32                 gnt_error_cnt;
310 
311 	u8					bt_afh_map[10];
312 	u8					bt_relink_downcount;
313 	boolean				is_tdma_btautoslot;
314 	boolean				is_tdma_btautoslot_hang;
315 
316 	boolean				is_rf_state_off;
317 
318 	boolean				is_hid_low_pri_tx_overhead;
319 	boolean				is_bt_multi_link;
320 	boolean				is_bt_a2dp_sink;
321 
322 	u8					wl_fw_dbg_info[10];
323 	u8					wl_rx_rate;
324 	u8					wl_rts_rx_rate;
325 
326 	u16					score_board_WB;
327 };
328 
329 #define  BT_8723D_1ANT_ANTDET_PSD_POINTS			256	/* MAX:1024 */
330 #define  BT_8723D_1ANT_ANTDET_PSD_AVGNUM			1	/* MAX:3 */
331 #define	BT_8723D_1ANT_ANTDET_BUF_LEN				16
332 
333 struct psdscan_sta_8723d_1ant {
334 
335 	u32			ant_det_bt_le_channel;  /* BT LE Channel ex:2412 */
336 	u32			ant_det_bt_tx_time;
337 	u32			ant_det_pre_psdscan_peak_val;
338 	boolean			ant_det_is_ant_det_available;
339 	u32			ant_det_psd_scan_peak_val;
340 	boolean			ant_det_is_btreply_available;
341 	u32			ant_det_psd_scan_peak_freq;
342 
343 	u8			ant_det_result;
344 	u8			ant_det_peak_val[BT_8723D_1ANT_ANTDET_BUF_LEN];
345 	u8			ant_det_peak_freq[BT_8723D_1ANT_ANTDET_BUF_LEN];
346 	u32			ant_det_try_count;
347 	u32			ant_det_fail_count;
348 	u32			ant_det_inteval_count;
349 	u32			ant_det_thres_offset;
350 
351 	u32			real_cent_freq;
352 	s32			real_offset;
353 	u32			real_span;
354 
355 	u32			psd_band_width;  /* unit: Hz */
356 	u32			psd_point;		/* 128/256/512/1024 */
357 	u32			psd_report[1024];  /* unit:dB (20logx), 0~255 */
358 	u32			psd_report_max_hold[1024];  /* unit:dB (20logx), 0~255 */
359 	u32			psd_start_point;
360 	u32			psd_stop_point;
361 	u32			psd_max_value_point;
362 	u32			psd_max_value;
363 	u32			psd_max_value2;
364 	u32			psd_avg_value;   /* filter loop_max_value that below BT_8723D_1ANT_ANTDET_PSDTHRES_1ANT, and average the rest*/
365 	u32			psd_loop_max_value[BT_8723D_1ANT_ANTDET_PSD_SWWEEPCOUNT];  /*max value in each loop */
366 	u32			psd_start_base;
367 	u32			psd_avg_num;	/* 1/8/16/32 */
368 	u32			psd_gen_count;
369 	boolean			is_AntDet_running;
370 	boolean			is_psd_show_max_only;
371 };
372 
373 /* *******************************************
374  * The following is interface which will notify coex module.
375  * ******************************************* */
376 void ex_halbtc8723d1ant_power_on_setting(IN struct btc_coexist *btcoexist);
377 void ex_halbtc8723d1ant_pre_load_firmware(IN struct btc_coexist *btcoexist);
378 void ex_halbtc8723d1ant_init_hw_config(IN struct btc_coexist *btcoexist,
379 				       IN boolean wifi_only);
380 void ex_halbtc8723d1ant_init_coex_dm(IN struct btc_coexist *btcoexist);
381 void ex_halbtc8723d1ant_ips_notify(IN struct btc_coexist *btcoexist,
382 				   IN u8 type);
383 void ex_halbtc8723d1ant_lps_notify(IN struct btc_coexist *btcoexist,
384 				   IN u8 type);
385 void ex_halbtc8723d1ant_scan_notify(IN struct btc_coexist *btcoexist,
386 				    IN u8 type);
387 void ex_halbtc8723d1ant_connect_notify(IN struct btc_coexist *btcoexist,
388 				       IN u8 type);
389 void ex_halbtc8723d1ant_media_status_notify(IN struct btc_coexist *btcoexist,
390 		IN u8 type);
391 void ex_halbtc8723d1ant_specific_packet_notify(IN struct btc_coexist *btcoexist,
392 		IN u8 type);
393 void ex_halbtc8723d1ant_bt_info_notify(IN struct btc_coexist *btcoexist,
394 				       IN u8 *tmp_buf, IN u8 length);
395 void ex_halbtc8723d1ant_wl_fwdbginfo_notify(IN struct btc_coexist *btcoexist,
396 				       IN u8 *tmp_buf, IN u8 length);
397 void ex_halbtc8723d1ant_rx_rate_change_notify(IN struct btc_coexist *btcoexist,
398 		IN BOOLEAN is_data_frame, IN u8 btc_rate_id);
399 void ex_halbtc8723d1ant_rf_status_notify(IN struct btc_coexist *btcoexist,
400 		IN u8 type);
401 void ex_halbtc8723d1ant_halt_notify(IN struct btc_coexist *btcoexist);
402 void ex_halbtc8723d1ant_pnp_notify(IN struct btc_coexist *btcoexist,
403 				   IN u8 pnp_state);
404 void ex_halbtc8723d1ant_coex_dm_reset(IN struct btc_coexist *btcoexist);
405 void ex_halbtc8723d1ant_periodical(IN struct btc_coexist *btcoexist);
406 void ex_halbtc8723d1ant_set_antenna_notify(IN struct btc_coexist *btcoexist,
407 		IN u8 type);
408 void ex_halbtc8723d1ant_display_coex_info(IN struct btc_coexist *btcoexist);
409 void ex_halbtc8723d1ant_antenna_detection(IN struct btc_coexist *btcoexist,
410 		IN u32 cent_freq, IN u32 offset, IN u32 span, IN u32 seconds);
411 void ex_halbtc8723d1ant_antenna_isolation(IN struct btc_coexist *btcoexist,
412 		IN u32 cent_freq, IN u32 offset, IN u32 span, IN u32 seconds);
413 
414 void ex_halbtc8723d1ant_psd_scan(IN struct btc_coexist *btcoexist,
415 		 IN u32 cent_freq, IN u32 offset, IN u32 span, IN u32 seconds);
416 void ex_halbtc8723d1ant_display_ant_detection(IN struct btc_coexist *btcoexist);
417 
418 #else
419 #define	ex_halbtc8723d1ant_power_on_setting(btcoexist)
420 #define	ex_halbtc8723d1ant_pre_load_firmware(btcoexist)
421 #define	ex_halbtc8723d1ant_init_hw_config(btcoexist, wifi_only)
422 #define	ex_halbtc8723d1ant_init_coex_dm(btcoexist)
423 #define	ex_halbtc8723d1ant_ips_notify(btcoexist, type)
424 #define	ex_halbtc8723d1ant_lps_notify(btcoexist, type)
425 #define	ex_halbtc8723d1ant_scan_notify(btcoexist, type)
426 #define	ex_halbtc8723d1ant_connect_notify(btcoexist, type)
427 #define	ex_halbtc8723d1ant_media_status_notify(btcoexist, type)
428 #define	ex_halbtc8723d1ant_specific_packet_notify(btcoexist, type)
429 #define	ex_halbtc8723d1ant_bt_info_notify(btcoexist, tmp_buf, length)
430 #define ex_halbtc8723d1ant_wl_fwdbginfo_notify(btcoexist, tmp_buf, length)
431 #define	ex_halbtc8723d1ant_rx_rate_change_notify(btcoexist, is_data_frame, btc_rate_id)
432 #define	ex_halbtc8723d1ant_rf_status_notify(btcoexist, type)
433 #define	ex_halbtc8723d1ant_halt_notify(btcoexist)
434 #define	ex_halbtc8723d1ant_pnp_notify(btcoexist, pnp_state)
435 #define	ex_halbtc8723d1ant_coex_dm_reset(btcoexist)
436 #define	ex_halbtc8723d1ant_periodical(btcoexist)
437 #define	ex_halbtc8723d1ant_display_coex_info(btcoexist)
438 #define	ex_halbtc8723d1ant_set_antenna_notify(btcoexist, type)
439 #define	ex_halbtc8723d1ant_antenna_detection(btcoexist, cent_freq, offset, span, seconds)
440 #define	ex_halbtc8723d1ant_antenna_isolation(btcoexist, cent_freq, offset, span, seconds)
441 #define	ex_halbtc8723d1ant_psd_scan(btcoexist, cent_freq, offset, span, seconds)
442 #define	ex_halbtc8723d1ant_display_ant_detection(btcoexist)
443 #endif
444 
445 #endif
446 
447