1 /* hci_spi_st.c - STMicroelectronics HCI SPI Bluetooth driver */
7  * SPDX-License-Identifier: Apache-2.0
65 #define MAX_MTU (SPI_MAX_MSG_LEN - H4_HDR_SIZE - BT_L2CAP_HDR_SIZE - BT_HCI_ACL_HDR_SIZE)
126 		return -ENOTSUP;  in bluenrg_bt_reset()
138 		/* Give firmware some time to read the IRQ high */  in bluenrg_bt_reset()
210 /* On BlueNRG-MS, host is expected to read */
236 		return -EINVAL;  in bt_spi_get_header()
247 		/* Make sure CS is raised before a new attempt */  in bt_spi_get_header()
248 		gpio_pin_set_dt(&bus.config.cs.gpio, 0);  in bt_spi_get_header()
257 		attempts--;  in bt_spi_get_header()
297 		/* To make sure we have a minimum delay from previous release cs */  in bt_spi_get_header()
301 		return -EINVAL;  in bt_spi_get_header()
307 	/* Perform a zero byte SPI transaction to acquire the SPI lock and lower CS  in bt_spi_get_header()
313 	/* Wait up to a maximum time of 100 ms */  in bt_spi_get_header()
316 		return -EIO;  in bt_spi_get_header()
342 		return -ENOBUFS;  in bt_spi_send_aci_config()
362 	const bt_addr_t *addr = &params->public_addr;  in bt_spi_bluenrg_setup()
372 			addr->val, sizeof(addr->val));  in bt_spi_bluenrg_setup()
401 		net_buf_add_mem(buf, msg, MIN(size, len - buf->len));  in bt_spi_rx_buf_construct()
402 		if (buf->len >= len) {  in bt_spi_rx_buf_construct()
405 			return -EINPROGRESS;  in bt_spi_rx_buf_construct()
416 		if (sys_le16_to_cpu(evt->len) > 0xff) {  in bt_spi_rx_buf_construct()
417 			return -ENOMEM;  in bt_spi_rx_buf_construct()
420 		memmove(msg + (1 + sizeof(*evt2)), msg + (1 + sizeof(*evt)), evt2->len);  in bt_spi_rx_buf_construct()
429 				return -ECANCELED;  in bt_spi_rx_buf_construct()
443 				return -ENOMEM;  in bt_spi_rx_buf_construct()
451 			return -ENOMEM;  in bt_spi_rx_buf_construct()
454 		size = size - 1;  in bt_spi_rx_buf_construct()
458 			ret = -EINPROGRESS;  in bt_spi_rx_buf_construct()
469 			return -ENOMEM;  in bt_spi_rx_buf_construct()
483 			return -ENOMEM;  in bt_spi_rx_buf_construct()
488 			return -ENOMEM;  in bt_spi_rx_buf_construct()
495 		return -ENOTSUP;  in bt_spi_rx_buf_construct()
505 	struct bt_spi_data *hci = dev->data;  in bt_spi_rx_thread()
549 				hci->recv(dev, buf);  in bt_spi_rx_thread()
567 	if (buf->len >= SPI_MAX_MSG_LEN) {  in bt_spi_send()
568 		LOG_ERR("Message too long (%d)", buf->len);  in bt_spi_send()
569 		return -EINVAL;  in bt_spi_send()
586 		return -EINVAL;  in bt_spi_send()
591 	data_ptr = buf->data;  in bt_spi_send()
592 	remaining_bytes = buf->len;  in bt_spi_send()
602 			ret = -ECANCELED;  in bt_spi_send()
610 		remaining_bytes -= size;  in bt_spi_send()
623 	LOG_HEXDUMP_DBG(buf->data, buf->len, "SPI TX");  in bt_spi_send()
633 	if (bt_spi_get_cmd(buf->data) == BT_HCI_OP_RESET) {  in bt_spi_send()
644 	struct bt_spi_data *hci = dev->data;  in bt_spi_open()
653 	/* Configure IRQ pin and the IRQ call-back/handler */  in bt_spi_open()
671 	hci->recv = recv;  in bt_spi_open()
698 	.setup          = bt_spi_bluenrg_setup,
709 		return -ENODEV;  in bt_spi_init()
714 		return -ENODEV;  in bt_spi_init()
719 		return -ENODEV;  in bt_spi_init()