static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t tx) { Flash *s = M25P80(ss); uint32_t r = 0; switch (s->state) { case STATE_PAGE_PROGRAM: DB_PRINT_L(1, "page program cur_addr=%#" PRIx64 " data=%" PRIx8 "\n", s->cur_addr, (uint8_t)tx); flash_write8(s, s->cur_addr, (uint8_t)tx); s->cur_addr++; break; case STATE_READ: r = s->storage[s->cur_addr]; DB_PRINT_L(1, "READ 0x%" PRIx64 "=%" PRIx8 "\n", s->cur_addr, (uint8_t)r); s->cur_addr = (s->cur_addr + 1) % s->size; break; case STATE_COLLECTING_DATA: case STATE_COLLECTING_VAR_LEN_DATA: s->data[s->len] = (uint8_t)tx; s->len++; if (s->len == s->needed_bytes) { complete_collecting_data(s); } break; case STATE_READING_DATA: r = s->data[s->pos]; s->pos++; if (s->pos == s->len) { s->pos = 0; s->state = STATE_IDLE; } break; default: case STATE_IDLE: decode_new_cmd(s, (uint8_t)tx); break; } return r; }