3  * Copyright (c) 2015-2016 Intel Corporation
5  * SPDX-License-Identifier: Apache-2.0
74 #define H5_TX_ACK_PEND	2
81 #define H5_HDR_LEN(hdr)		((((hdr)[1] >> 4) & 0x0f) + ((hdr)[2] << 4))
88 				 ((hdr)[2] |= (len) >> 4))
123 /* Third byte may change */
129 #define SIGNAL_COUNT	2
151 static int h5_unslip_byte(uint8_t *byte)  in h5_unslip_byte()  argument
155 	if (*byte != SLIP_ESC) {  in h5_unslip_byte()
160 		count = uart_fifo_read(h5_dev, byte, sizeof(*byte));  in h5_unslip_byte()
163 	switch (*byte) {  in h5_unslip_byte()
165 		*byte = SLIP_DELIMITER;  in h5_unslip_byte()
168 		*byte = SLIP_ESC;  in h5_unslip_byte()
171 		LOG_ERR("Invalid escape byte %x\n", *byte);  in h5_unslip_byte()
172 		return -EIO;  in h5_unslip_byte()
199 		number_removed--;  in process_unack()
200 		/* Similar to (n - 1) % 8 with unsigned conversion */  in process_unack()
201 		next_seq = (next_seq - 1) & 0x07;  in process_unack()
223 		unack_queue_len--;  in process_unack()
224 		number_removed--;  in process_unack()
250 		printk("%s zero-length signal packet\n", str);  in hexdump()
254 	while (length--) {  in hexdump()
276 static uint8_t h5_slip_byte(uint8_t byte)  in h5_slip_byte()  argument
278 	switch (byte) {  in h5_slip_byte()
282 		return 2;  in h5_slip_byte()
286 		return 2;  in h5_slip_byte()
288 		uart_poll_out(h5_dev, byte);  in h5_slip_byte()
317 	hdr[3] = ~((hdr[0] + hdr[1] + hdr[2]) & 0xff);  in h5_send()
357 			h5.tx_seq = (h5.tx_seq - 1) & 0x07;  in retx_timeout()
358 			unack_queue_len--;  in retx_timeout()
412 		hexdump("=> ", buf->data, buf->len);  in h5_process_complete_packet()
421 	uint8_t byte, type;  in bt_uart_isr()  local
438 			/* Only the UART RX path is interrupt-enabled */  in bt_uart_isr()
442 		ret = uart_fifo_read(h5_dev, &byte, sizeof(byte));  in bt_uart_isr()
449 			if (byte == SLIP_DELIMITER) {  in bt_uart_isr()
458 			if (byte == SLIP_DELIMITER) {  in bt_uart_isr()
463 			if (h5_unslip_byte(&byte) < 0) {  in bt_uart_isr()
468 			memcpy(&hdr[sizeof(hdr) - remaining], &byte, 1);  in bt_uart_isr()
469 			remaining--;  in bt_uart_isr()
513 			if (byte == SLIP_DELIMITER) {  in bt_uart_isr()
519 			if (h5_unslip_byte(&byte) < 0) {  in bt_uart_isr()
525 			if (buf_tailroom < sizeof(byte)) {  in bt_uart_isr()
526 				LOG_ERR("Not enough space in buffer %zu/%zu", sizeof(byte),  in bt_uart_isr()
532 			net_buf_add_mem(h5.rx_buf, &byte, sizeof(byte));  in bt_uart_isr()
533 			remaining--;  in bt_uart_isr()
539 			if (byte != SLIP_DELIMITER) {  in bt_uart_isr()
568 	LOG_DBG("buf %p type %u len %u", buf, bt_buf_get_type(buf), buf->len);  in h5_queue()
588 	for (; count; ev++, count--) {  in process_events()
589 		LOG_DBG("ev->state %u", ev->state);  in process_events()
591 		switch (ev->state) {  in process_events()
602 			if (ev->tag == 0) {  in process_events()
613 			} else if (ev->tag == 2) {  in process_events()
618 				h5_send(buf->data, type, buf->len);  in process_events()
632 			LOG_WRN("Unexpected k_poll event state %u", ev->state);  in process_events()
649 						&h5.tx_queue, 2),  in tx_thread()
659 		int err, ev_count = 2;  in tx_thread()
666 			events[2].state = K_POLL_STATE_NOT_READY;  in tx_thread()
693 		hexdump("=> ", buf->data, buf->len);  in rx_thread()
695 		if (!memcmp(buf->data, sync_req, sizeof(sync_req))) {  in rx_thread()
716 		} else if (!memcmp(buf->data, conf_req, 2)) {  in rx_thread()
717 			if (buf->len > 2) {  in rx_thread()
718 				uint8_t tx_win = buf->data[2] & 0x07;  in rx_thread()
724 			conf_rsp[2] = h5.tx_win;  in rx_thread()
736 			LOG_ERR("Not handled yet %x %x", buf->data[0], buf->data[1]);  in rx_thread()
753 		LOG_ERR("HCI UART %s is not ready", h5_dev->name);  in hci_uart_init()
754 		return -EINVAL;  in hci_uart_init()