Lines Matching refs:kcs
125 static unsigned int init_kcs_data(struct si_sm_data *kcs,
128 kcs->state = KCS_IDLE;
129 kcs->io = io;
130 kcs->write_pos = 0;
131 kcs->write_count = 0;
132 kcs->orig_write_count = 0;
133 kcs->read_pos = 0;
134 kcs->error_retries = 0;
135 kcs->truncated = 0;
136 kcs->ibf_timeout = IBF_RETRY_TIMEOUT;
137 kcs->obf_timeout = OBF_RETRY_TIMEOUT;
143 static inline unsigned char read_status(struct si_sm_data *kcs)
145 return kcs->io->inputb(kcs->io, 1);
148 static inline unsigned char read_data(struct si_sm_data *kcs)
150 return kcs->io->inputb(kcs->io, 0);
153 static inline void write_cmd(struct si_sm_data *kcs, unsigned char data)
155 kcs->io->outputb(kcs->io, 1, data);
158 static inline void write_data(struct si_sm_data *kcs, unsigned char data)
160 kcs->io->outputb(kcs->io, 0, data);
180 static inline void write_next_byte(struct si_sm_data *kcs)
182 write_data(kcs, kcs->write_data[kcs->write_pos]);
183 (kcs->write_pos)++;
184 (kcs->write_count)--;
187 static inline void start_error_recovery(struct si_sm_data *kcs, char *reason)
189 (kcs->error_retries)++;
190 if (kcs->error_retries > MAX_ERROR_RETRIES) {
192 dev_dbg(kcs->io->dev, "ipmi_kcs_sm: kcs hosed: %s\n",
194 kcs->state = KCS_HOSED;
196 kcs->error0_timeout = jiffies + ERROR0_OBF_WAIT_JIFFIES;
197 kcs->state = KCS_ERROR0;
201 static inline void read_next_byte(struct si_sm_data *kcs)
203 if (kcs->read_pos >= MAX_KCS_READ_SIZE) {
205 read_data(kcs);
206 kcs->truncated = 1;
208 kcs->read_data[kcs->read_pos] = read_data(kcs);
209 (kcs->read_pos)++;
211 write_data(kcs, KCS_READ_BYTE);
214 static inline int check_ibf(struct si_sm_data *kcs, unsigned char status,
218 kcs->ibf_timeout -= time;
219 if (kcs->ibf_timeout < 0) {
220 start_error_recovery(kcs, "IBF not ready in time");
221 kcs->ibf_timeout = IBF_RETRY_TIMEOUT;
226 kcs->ibf_timeout = IBF_RETRY_TIMEOUT;
230 static inline int check_obf(struct si_sm_data *kcs, unsigned char status,
234 kcs->obf_timeout -= time;
235 if (kcs->obf_timeout < 0) {
236 kcs->obf_timeout = OBF_RETRY_TIMEOUT;
237 start_error_recovery(kcs, "OBF not ready in time");
242 kcs->obf_timeout = OBF_RETRY_TIMEOUT;
246 static void clear_obf(struct si_sm_data *kcs, unsigned char status)
249 read_data(kcs);
252 static void restart_kcs_transaction(struct si_sm_data *kcs)
254 kcs->write_count = kcs->orig_write_count;
255 kcs->write_pos = 0;
256 kcs->read_pos = 0;
257 kcs->state = KCS_WAIT_WRITE_START;
258 kcs->ibf_timeout = IBF_RETRY_TIMEOUT;
259 kcs->obf_timeout = OBF_RETRY_TIMEOUT;
260 write_cmd(kcs, KCS_WRITE_START);
263 static int start_kcs_transaction(struct si_sm_data *kcs, unsigned char *data,
273 if ((kcs->state != KCS_IDLE) && (kcs->state != KCS_HOSED)) {
274 dev_warn(kcs->io->dev, "KCS in invalid state %d\n", kcs->state);
279 dev_dbg(kcs->io->dev, "%s -", __func__);
284 kcs->error_retries = 0;
285 memcpy(kcs->write_data, data, size);
286 kcs->write_count = size;
287 kcs->orig_write_count = size;
288 kcs->write_pos = 0;
289 kcs->read_pos = 0;
290 kcs->state = KCS_START_OP;
291 kcs->ibf_timeout = IBF_RETRY_TIMEOUT;
292 kcs->obf_timeout = OBF_RETRY_TIMEOUT;
296 static int get_kcs_result(struct si_sm_data *kcs, unsigned char *data,
299 if (length < kcs->read_pos) {
300 kcs->read_pos = length;
301 kcs->truncated = 1;
304 memcpy(data, kcs->read_data, kcs->read_pos);
306 if ((length >= 3) && (kcs->read_pos < 3)) {
310 kcs->read_pos = 3;
312 if (kcs->truncated) {
319 kcs->truncated = 0;
322 return kcs->read_pos;
330 static enum si_sm_result kcs_event(struct si_sm_data *kcs, long time)
335 status = read_status(kcs);
338 dev_dbg(kcs->io->dev,
339 "KCS: State = %d, %x\n", kcs->state, status);
342 if (!check_ibf(kcs, status, time))
348 switch (kcs->state) {
351 clear_obf(kcs, status);
360 start_error_recovery(kcs,
365 clear_obf(kcs, status);
366 write_cmd(kcs, KCS_WRITE_START);
367 kcs->state = KCS_WAIT_WRITE_START;
373 kcs,
377 read_data(kcs);
378 if (kcs->write_count == 1) {
379 write_cmd(kcs, KCS_WRITE_END);
380 kcs->state = KCS_WAIT_WRITE_END;
382 write_next_byte(kcs);
383 kcs->state = KCS_WAIT_WRITE;
389 start_error_recovery(kcs,
393 clear_obf(kcs, status);
394 if (kcs->write_count == 1) {
395 write_cmd(kcs, KCS_WRITE_END);
396 kcs->state = KCS_WAIT_WRITE_END;
398 write_next_byte(kcs);
404 start_error_recovery(kcs,
409 clear_obf(kcs, status);
410 write_next_byte(kcs);
411 kcs->state = KCS_WAIT_READ;
417 kcs,
423 if (!check_obf(kcs, status, time))
425 read_next_byte(kcs);
436 clear_obf(kcs, status);
437 kcs->orig_write_count = 0;
438 kcs->state = KCS_IDLE;
444 clear_obf(kcs, status);
445 status = read_status(kcs);
448 if (time_before(jiffies, kcs->error0_timeout))
450 write_cmd(kcs, KCS_GET_STATUS_ABORT);
451 kcs->state = KCS_ERROR1;
455 clear_obf(kcs, status);
456 write_data(kcs, 0);
457 kcs->state = KCS_ERROR2;
462 start_error_recovery(kcs,
466 if (!check_obf(kcs, status, time))
469 clear_obf(kcs, status);
470 write_data(kcs, KCS_READ_BYTE);
471 kcs->state = KCS_ERROR3;
476 start_error_recovery(kcs,
481 if (!check_obf(kcs, status, time))
484 clear_obf(kcs, status);
485 if (kcs->orig_write_count) {
486 restart_kcs_transaction(kcs);
488 kcs->state = KCS_IDLE;
497 if (kcs->state == KCS_HOSED) {
498 init_kcs_data(kcs, kcs->io);
510 static int kcs_detect(struct si_sm_data *kcs)
518 if (read_status(kcs) == 0xff)
524 static void kcs_cleanup(struct si_sm_data *kcs)