2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 #include <ao_config.h>
23 #include <ao_tracker.h>
26 __xdata uint8_t ao_log_mutex;
27 __pdata uint32_t ao_log_current_pos;
28 __pdata uint32_t ao_log_end_pos;
29 __pdata uint32_t ao_log_start_pos;
30 __xdata uint8_t ao_log_running;
31 __pdata enum ao_flight_state ao_log_state;
32 __xdata uint16_t ao_flight_number;
41 * When erasing a flight log, make sure the config block
42 * has an up-to-date version of the current flight number
50 static __xdata struct ao_log_erase erase;
53 #define LOG_MAX_ERASE 16
56 #ifndef LOG_ERASE_MARK
58 #error "Must define LOG_ERASE_MARK with USE_EEPROM_CONFIG"
60 #define LOG_ERASE_MARK 0x00
64 ao_log_erase_pos(uint8_t i)
66 return i * sizeof (struct ao_log_erase) + AO_CONFIG_MAX_SIZE;
70 ao_log_write_erase(uint8_t pos)
72 erase.mark = LOG_ERASE_MARK;
73 erase.flight = ao_flight_number;
74 ao_config_write(ao_log_erase_pos(pos), &erase, sizeof (erase));
79 for (i = 1; i < LOG_MAX_ERASE; i++) {
80 erase.mark = ~LOG_ERASE_MARK;
82 ao_config_write(ao_log_erase_pos(i), &erase, sizeof (erase));
91 ao_log_read_erase(uint8_t pos)
93 ao_config_read(ao_log_erase_pos(pos), &erase, sizeof (erase));
98 ao_log_erase_mark(void)
102 for (i = 0; i < LOG_MAX_ERASE; i++) {
103 ao_log_read_erase(i);
104 if (erase.mark == LOG_ERASE_MARK && erase.flight == ao_flight_number)
106 if (erase.mark != LOG_ERASE_MARK) {
107 ao_log_write_erase(i);
117 return (uint8_t) (ao_storage_log_max / ao_config.flight_log_max);
121 ao_log_pos(uint8_t slot)
123 return ((slot) * ao_config.flight_log_max);
127 ao_log_max_flight(void)
132 uint16_t max_flight = 0;
134 /* Scan the log space looking for the biggest flight number */
135 log_slots = ao_log_slots();
136 for (log_slot = 0; log_slot < log_slots; log_slot++) {
137 log_flight = ao_log_flight(log_slot);
140 if (max_flight == 0 || (int16_t) (log_flight - max_flight) > 0)
141 max_flight = log_flight;
147 ao_log_erase(uint8_t slot) __reentrant
149 uint32_t log_current_pos, log_end_pos;
152 log_current_pos = ao_log_pos(slot);
153 log_end_pos = log_current_pos + ao_config.flight_log_max;
154 while (log_current_pos < log_end_pos) {
156 static __xdata uint8_t b;
159 * Check to see if we've reached the end of
160 * the used memory to avoid re-erasing the same
161 * memory over and over again
163 for (i = 0; i < 16; i++) {
164 if (ao_storage_read(log_current_pos + i, &b, 1))
170 ao_storage_erase(log_current_pos);
171 log_current_pos += ao_storage_block;
176 ao_log_find_max_erase_flight(void) __reentrant
180 /* Now look through the log of flight numbers from erase operations and
181 * see if the last one is bigger than what we found above
183 for (log_slot = LOG_MAX_ERASE; log_slot-- > 0;) {
184 ao_log_read_erase(log_slot);
185 if (erase.mark == LOG_ERASE_MARK) {
186 if (ao_flight_number == 0 ||
187 (int16_t) (erase.flight - ao_flight_number) > 0)
188 ao_flight_number = erase.flight;
192 if (ao_flight_number == 0)
193 ao_flight_number = 1;
197 ao_log_scan(void) __reentrant
201 #if FLIGHT_LOG_APPEND
209 /* Get any existing flight number */
210 ao_flight_number = ao_log_max_flight();
212 #if FLIGHT_LOG_APPEND
214 /* Deal with older OS versions which stored multiple
215 * flights in rom by erasing everything after the first
218 if (ao_config.flight_log_max != ao_storage_log_max) {
219 log_slots = ao_log_slots();
220 for (log_slot = 1; log_slot < log_slots; log_slot++) {
221 if (ao_log_flight(log_slot) != 0)
222 ao_log_erase(log_slot);
224 ao_config_log_fix_append();
226 ao_log_current_pos = ao_log_pos(0);
227 ao_log_end_pos = ao_log_current_pos + ao_storage_log_max;
229 if (ao_flight_number) {
230 uint32_t full = ao_log_current_pos;
231 uint32_t empty = ao_log_end_pos - ao_log_size;
233 /* If there's already a flight started, then find the
237 ao_log_current_pos = (full + empty) >> 1;
238 ao_log_current_pos -= ao_log_current_pos % ao_log_size;
240 if (ao_log_current_pos == full) {
241 if (ao_log_check(ao_log_current_pos))
242 ao_log_current_pos += ao_log_size;
245 if (ao_log_current_pos == empty)
248 if (ao_log_check(ao_log_current_pos)) {
249 full = ao_log_current_pos;
251 empty = ao_log_current_pos;
256 ao_log_find_max_erase_flight();
259 ao_wakeup(&ao_flight_number);
263 if (ao_flight_number)
264 if (++ao_flight_number == 0)
265 ao_flight_number = 1;
267 ao_log_find_max_erase_flight();
269 /* With a flight number in hand, find a place to write a new log,
270 * use the target flight number to index the available log slots so
271 * that we write logs to each spot about the same number of times.
274 /* Find a log slot for the next flight, if available */
275 ao_log_current_pos = ao_log_end_pos = 0;
276 log_slots = ao_log_slots();
277 log_want = (ao_flight_number - 1) % log_slots;
280 if (ao_log_flight(log_slot) == 0) {
281 ao_log_current_pos = ao_log_pos(log_slot);
282 ao_log_end_pos = ao_log_current_pos + ao_config.flight_log_max;
285 if (++log_slot >= log_slots)
287 } while (log_slot != log_want);
288 ao_wakeup(&ao_flight_number);
298 ao_wakeup(&ao_log_running);
311 return ao_log_max_flight() != 0;
317 return ao_log_current_pos == ao_log_end_pos;
321 #define LOG_ADC HAS_ADC
325 static __xdata struct ao_task ao_log_task;
329 ao_log_list(void) __reentrant
335 slots = ao_log_slots();
336 for (slot = 0; slot < slots; slot++)
338 flight = ao_log_flight(slot);
340 printf ("flight %d start %x end %x\n",
342 (uint16_t) (ao_log_pos(slot) >> 8),
343 (uint16_t) (ao_log_pos(slot+1) >> 8));
349 ao_log_delete(void) __reentrant
355 if (ao_cmd_status != ao_cmd_success)
358 slots = ao_log_slots();
359 /* Look for the flight log matching the requested flight */
361 for (slot = 0; slot < slots; slot++) {
362 if (ao_log_flight(slot) == ao_cmd_lex_i) {
364 ao_tracker_erase_start(ao_cmd_lex_i);
368 ao_tracker_erase_end();
375 printf("No such flight: %d\n", ao_cmd_lex_i);
378 __code struct ao_cmds ao_log_cmds[] = {
379 { ao_log_list, "l\0List logs" },
380 { ao_log_delete, "d <flight-number>\0Delete flight" },
389 /* For now, just log the flight starting at the begining of eeprom */
390 ao_log_state = ao_flight_invalid;
392 ao_cmd_register(&ao_log_cmds[0]);
395 #error Define HAS_ADC for ao_log.c
398 /* Create a task to log events to eeprom */
399 ao_add_task(&ao_log_task, ao_log, "log");