Lines Matching +full:three +full:- +full:state
1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Bluetooth HCI Three-wire UART driver
34 * Maximum Three-wire packet:
35 * 4 byte header + max value for 12-bit length + 2 bytes for CRC
39 /* Convenience macros for reading Three-wire header values */
52 /* H5 state flags */
85 } state; member
113 struct h5 *h5 = hu->priv; in h5_link_control()
124 skb_queue_tail(&h5->unrel, nskb); in h5_link_control()
130 return h5->tx_win & 0x07; in h5_cfg_field()
138 struct hci_uart *hu = h5->hu; in h5_timed_event()
142 BT_DBG("%s", hu->hdev->name); in h5_timed_event()
144 if (h5->state == H5_UNINITIALIZED) in h5_timed_event()
147 if (h5->state == H5_INITIALIZED) { in h5_timed_event()
152 if (h5->state != H5_ACTIVE) { in h5_timed_event()
153 mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT); in h5_timed_event()
157 if (h5->sleep != H5_AWAKE) { in h5_timed_event()
158 h5->sleep = H5_SLEEPING; in h5_timed_event()
162 BT_DBG("hu %p retransmitting %u pkts", hu, h5->unack.qlen); in h5_timed_event()
164 spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); in h5_timed_event()
166 while ((skb = __skb_dequeue_tail(&h5->unack)) != NULL) { in h5_timed_event()
167 h5->tx_seq = (h5->tx_seq - 1) & 0x07; in h5_timed_event()
168 skb_queue_head(&h5->rel, skb); in h5_timed_event()
171 spin_unlock_irqrestore(&h5->unack.lock, flags); in h5_timed_event()
179 struct h5 *h5 = hu->priv; in h5_peer_reset()
181 bt_dev_err(hu->hdev, "Peer device has reset"); in h5_peer_reset()
183 h5->state = H5_UNINITIALIZED; in h5_peer_reset()
185 del_timer(&h5->timer); in h5_peer_reset()
187 skb_queue_purge(&h5->rel); in h5_peer_reset()
188 skb_queue_purge(&h5->unrel); in h5_peer_reset()
189 skb_queue_purge(&h5->unack); in h5_peer_reset()
191 h5->tx_seq = 0; in h5_peer_reset()
192 h5->tx_ack = 0; in h5_peer_reset()
195 hci_reset_dev(hu->hdev); in h5_peer_reset()
205 if (hu->serdev) { in h5_open()
206 h5 = serdev_device_get_drvdata(hu->serdev); in h5_open()
210 return -ENOMEM; in h5_open()
213 hu->priv = h5; in h5_open()
214 h5->hu = hu; in h5_open()
216 skb_queue_head_init(&h5->unack); in h5_open()
217 skb_queue_head_init(&h5->rel); in h5_open()
218 skb_queue_head_init(&h5->unrel); in h5_open()
222 timer_setup(&h5->timer, h5_timed_event, 0); in h5_open()
224 h5->tx_win = H5_TX_WIN_MAX; in h5_open()
226 if (h5->vnd && h5->vnd->open) in h5_open()
227 h5->vnd->open(h5); in h5_open()
229 set_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags); in h5_open()
233 mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT); in h5_open()
240 struct h5 *h5 = hu->priv; in h5_close()
242 del_timer_sync(&h5->timer); in h5_close()
244 skb_queue_purge(&h5->unack); in h5_close()
245 skb_queue_purge(&h5->rel); in h5_close()
246 skb_queue_purge(&h5->unrel); in h5_close()
248 kfree_skb(h5->rx_skb); in h5_close()
249 h5->rx_skb = NULL; in h5_close()
251 if (h5->vnd && h5->vnd->close) in h5_close()
252 h5->vnd->close(h5); in h5_close()
254 if (!hu->serdev) in h5_close()
262 struct h5 *h5 = hu->priv; in h5_setup()
264 if (h5->vnd && h5->vnd->setup) in h5_setup()
265 return h5->vnd->setup(h5); in h5_setup()
277 spin_lock_irqsave(&h5->unack.lock, flags); in h5_pkt_cull()
279 to_remove = skb_queue_len(&h5->unack); in h5_pkt_cull()
283 seq = h5->tx_seq; in h5_pkt_cull()
286 if (h5->rx_ack == seq) in h5_pkt_cull()
289 to_remove--; in h5_pkt_cull()
290 seq = (seq - 1) & 0x07; in h5_pkt_cull()
293 if (seq != h5->rx_ack) in h5_pkt_cull()
297 skb_queue_walk_safe(&h5->unack, skb, tmp) { in h5_pkt_cull()
301 __skb_unlink(skb, &h5->unack); in h5_pkt_cull()
305 if (skb_queue_empty(&h5->unack)) in h5_pkt_cull()
306 del_timer(&h5->timer); in h5_pkt_cull()
309 spin_unlock_irqrestore(&h5->unack.lock, flags); in h5_pkt_cull()
314 struct h5 *h5 = hu->priv; in h5_handle_internal_rx()
322 const unsigned char *hdr = h5->rx_skb->data; in h5_handle_internal_rx()
323 const unsigned char *data = &h5->rx_skb->data[4]; in h5_handle_internal_rx()
325 BT_DBG("%s", hu->hdev->name); in h5_handle_internal_rx()
336 if (h5->state == H5_ACTIVE) in h5_handle_internal_rx()
340 if (h5->state == H5_ACTIVE) in h5_handle_internal_rx()
342 h5->state = H5_INITIALIZED; in h5_handle_internal_rx()
349 h5->tx_win = (data[2] & 0x07); in h5_handle_internal_rx()
350 BT_DBG("Three-wire init complete. tx_win %u", h5->tx_win); in h5_handle_internal_rx()
351 h5->state = H5_ACTIVE; in h5_handle_internal_rx()
356 h5->sleep = H5_SLEEPING; in h5_handle_internal_rx()
360 h5->sleep = H5_AWAKE; in h5_handle_internal_rx()
364 h5->sleep = H5_AWAKE; in h5_handle_internal_rx()
375 struct h5 *h5 = hu->priv; in h5_complete_rx_pkt()
376 const unsigned char *hdr = h5->rx_skb->data; in h5_complete_rx_pkt()
379 h5->tx_ack = (h5->tx_ack + 1) % 8; in h5_complete_rx_pkt()
380 set_bit(H5_TX_ACK_REQ, &h5->flags); in h5_complete_rx_pkt()
384 h5->rx_ack = H5_HDR_ACK(hdr); in h5_complete_rx_pkt()
393 hci_skb_pkt_type(h5->rx_skb) = H5_HDR_PKT_TYPE(hdr); in h5_complete_rx_pkt()
395 /* Remove Three-wire header */ in h5_complete_rx_pkt()
396 skb_pull(h5->rx_skb, 4); in h5_complete_rx_pkt()
398 hci_recv_frame(hu->hdev, h5->rx_skb); in h5_complete_rx_pkt()
399 h5->rx_skb = NULL; in h5_complete_rx_pkt()
420 struct h5 *h5 = hu->priv; in h5_rx_payload()
421 const unsigned char *hdr = h5->rx_skb->data; in h5_rx_payload()
424 h5->rx_func = h5_rx_crc; in h5_rx_payload()
425 h5->rx_pending = 2; in h5_rx_payload()
435 struct h5 *h5 = hu->priv; in h5_rx_3wire_hdr()
436 const unsigned char *hdr = h5->rx_skb->data; in h5_rx_3wire_hdr()
439 hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr), in h5_rx_3wire_hdr()
444 bt_dev_err(hu->hdev, "Invalid header checksum"); in h5_rx_3wire_hdr()
449 if (H5_HDR_RELIABLE(hdr) && H5_HDR_SEQ(hdr) != h5->tx_ack) { in h5_rx_3wire_hdr()
450 bt_dev_err(hu->hdev, "Out-of-order packet arrived (%u != %u)", in h5_rx_3wire_hdr()
451 H5_HDR_SEQ(hdr), h5->tx_ack); in h5_rx_3wire_hdr()
456 if (h5->state != H5_ACTIVE && in h5_rx_3wire_hdr()
458 bt_dev_err(hu->hdev, "Non-link packet received in non-active state"); in h5_rx_3wire_hdr()
463 h5->rx_func = h5_rx_payload; in h5_rx_3wire_hdr()
464 h5->rx_pending = H5_HDR_LEN(hdr); in h5_rx_3wire_hdr()
471 struct h5 *h5 = hu->priv; in h5_rx_pkt_start()
476 h5->rx_func = h5_rx_3wire_hdr; in h5_rx_pkt_start()
477 h5->rx_pending = 4; in h5_rx_pkt_start()
479 h5->rx_skb = bt_skb_alloc(H5_MAX_LEN, GFP_ATOMIC); in h5_rx_pkt_start()
480 if (!h5->rx_skb) { in h5_rx_pkt_start()
481 bt_dev_err(hu->hdev, "Can't allocate mem for new packet"); in h5_rx_pkt_start()
483 return -ENOMEM; in h5_rx_pkt_start()
486 h5->rx_skb->dev = (void *)hu->hdev; in h5_rx_pkt_start()
493 struct h5 *h5 = hu->priv; in h5_rx_delimiter()
496 h5->rx_func = h5_rx_pkt_start; in h5_rx_delimiter()
506 if (!test_bit(H5_RX_ESC, &h5->flags) && c == SLIP_ESC) { in h5_unslip_one_byte()
507 set_bit(H5_RX_ESC, &h5->flags); in h5_unslip_one_byte()
511 if (test_and_clear_bit(H5_RX_ESC, &h5->flags)) { in h5_unslip_one_byte()
526 skb_put_data(h5->rx_skb, byte, 1); in h5_unslip_one_byte()
527 h5->rx_pending--; in h5_unslip_one_byte()
529 BT_DBG("unslipped 0x%02hhx, rx_pending %zu", *byte, h5->rx_pending); in h5_unslip_one_byte()
534 if (h5->rx_skb) { in h5_reset_rx()
535 kfree_skb(h5->rx_skb); in h5_reset_rx()
536 h5->rx_skb = NULL; in h5_reset_rx()
539 h5->rx_func = h5_rx_delimiter; in h5_reset_rx()
540 h5->rx_pending = 0; in h5_reset_rx()
541 clear_bit(H5_RX_ESC, &h5->flags); in h5_reset_rx()
546 struct h5 *h5 = hu->priv; in h5_recv()
549 BT_DBG("%s pending %zu count %d", hu->hdev->name, h5->rx_pending, in h5_recv()
555 if (h5->rx_pending > 0) { in h5_recv()
557 bt_dev_err(hu->hdev, "Too short H5 packet"); in h5_recv()
564 ptr++; count--; in h5_recv()
568 processed = h5->rx_func(hu, *ptr); in h5_recv()
573 count -= processed; in h5_recv()
581 struct h5 *h5 = hu->priv; in h5_enqueue()
583 if (skb->len > 0xfff) { in h5_enqueue()
584 bt_dev_err(hu->hdev, "Packet too long (%u bytes)", skb->len); in h5_enqueue()
589 if (h5->state != H5_ACTIVE) { in h5_enqueue()
590 bt_dev_err(hu->hdev, "Ignoring HCI data in non-active state"); in h5_enqueue()
598 skb_queue_tail(&h5->rel, skb); in h5_enqueue()
603 skb_queue_tail(&h5->unrel, skb); in h5_enqueue()
607 bt_dev_err(hu->hdev, "Unknown packet type %u", hci_skb_pkt_type(skb)); in h5_enqueue()
657 struct h5 *h5 = hu->priv; in h5_prepare_pkt()
663 bt_dev_err(hu->hdev, "Unknown packet type %u", pkt_type); in h5_prepare_pkt()
681 hdr[0] = h5->tx_ack << 3; in h5_prepare_pkt()
682 clear_bit(H5_TX_ACK_REQ, &h5->flags); in h5_prepare_pkt()
687 hdr[0] |= h5->tx_seq; in h5_prepare_pkt()
688 h5->tx_seq = (h5->tx_seq + 1) % 8; in h5_prepare_pkt()
696 hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr), in h5_prepare_pkt()
713 struct h5 *h5 = hu->priv; in h5_dequeue()
717 if (h5->sleep != H5_AWAKE) { in h5_dequeue()
720 if (h5->sleep == H5_WAKING_UP) in h5_dequeue()
723 h5->sleep = H5_WAKING_UP; in h5_dequeue()
726 mod_timer(&h5->timer, jiffies + HZ / 100); in h5_dequeue()
730 skb = skb_dequeue(&h5->unrel); in h5_dequeue()
733 skb->data, skb->len); in h5_dequeue()
739 skb_queue_head(&h5->unrel, skb); in h5_dequeue()
740 bt_dev_err(hu->hdev, "Could not dequeue pkt because alloc_skb failed"); in h5_dequeue()
743 spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); in h5_dequeue()
745 if (h5->unack.qlen >= h5->tx_win) in h5_dequeue()
748 skb = skb_dequeue(&h5->rel); in h5_dequeue()
751 skb->data, skb->len); in h5_dequeue()
753 __skb_queue_tail(&h5->unack, skb); in h5_dequeue()
754 mod_timer(&h5->timer, jiffies + H5_ACK_TIMEOUT); in h5_dequeue()
755 spin_unlock_irqrestore(&h5->unack.lock, flags); in h5_dequeue()
759 skb_queue_head(&h5->rel, skb); in h5_dequeue()
760 bt_dev_err(hu->hdev, "Could not dequeue pkt because alloc_skb failed"); in h5_dequeue()
764 spin_unlock_irqrestore(&h5->unack.lock, flags); in h5_dequeue()
766 if (test_bit(H5_TX_ACK_REQ, &h5->flags)) in h5_dequeue()
780 .name = "Three-wire (H5)",
792 struct device *dev = &serdev->dev; in h5_serdev_probe()
797 return -ENOMEM; in h5_serdev_probe()
799 h5->hu = &h5->serdev_hu; in h5_serdev_probe()
800 h5->serdev_hu.serdev = serdev; in h5_serdev_probe()
806 match = acpi_match_device(dev->driver->acpi_match_table, dev); in h5_serdev_probe()
808 return -ENODEV; in h5_serdev_probe()
810 h5->vnd = (const struct h5_vnd *)match->driver_data; in h5_serdev_probe()
811 h5->id = (char *)match->id; in h5_serdev_probe()
813 if (h5->vnd->acpi_gpio_map) in h5_serdev_probe()
815 h5->vnd->acpi_gpio_map); in h5_serdev_probe()
821 return -ENODEV; in h5_serdev_probe()
823 h5->vnd = (const struct h5_vnd *)data; in h5_serdev_probe()
827 h5->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); in h5_serdev_probe()
828 if (IS_ERR(h5->enable_gpio)) in h5_serdev_probe()
829 return PTR_ERR(h5->enable_gpio); in h5_serdev_probe()
831 h5->device_wake_gpio = devm_gpiod_get_optional(dev, "device-wake", in h5_serdev_probe()
833 if (IS_ERR(h5->device_wake_gpio)) in h5_serdev_probe()
834 return PTR_ERR(h5->device_wake_gpio); in h5_serdev_probe()
836 return hci_uart_register_device(&h5->serdev_hu, &h5p); in h5_serdev_probe()
843 hci_uart_unregister_device(&h5->serdev_hu); in h5_serdev_remove()
851 if (h5->vnd && h5->vnd->suspend) in h5_serdev_suspend()
852 ret = h5->vnd->suspend(h5); in h5_serdev_suspend()
862 if (h5->vnd && h5->vnd->resume) in h5_serdev_resume()
863 ret = h5->vnd->resume(h5); in h5_serdev_resume()
879 btrtl_dev = btrtl_initialize(h5->hu->hdev, h5->id); in h5_btrtl_setup()
883 err = btrtl_get_uart_settings(h5->hu->hdev, btrtl_dev, in h5_btrtl_setup()
890 skb = __hci_cmd_sync(h5->hu->hdev, 0xfc17, sizeof(baudrate_data), in h5_btrtl_setup()
893 rtl_dev_err(h5->hu->hdev, "set baud rate command failed\n"); in h5_btrtl_setup()
902 serdev_device_set_baudrate(h5->hu->serdev, controller_baudrate); in h5_btrtl_setup()
903 serdev_device_set_flow_control(h5->hu->serdev, flow_control); in h5_btrtl_setup()
905 err = btrtl_download_firmware(h5->hu->hdev, btrtl_dev); in h5_btrtl_setup()
906 /* Give the device some time before the hci-core sends it a reset */ in h5_btrtl_setup()
912 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &h5->hu->hdev->quirks); in h5_btrtl_setup()
923 serdev_device_set_flow_control(h5->hu->serdev, false); in h5_btrtl_open()
924 serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN); in h5_btrtl_open()
925 serdev_device_set_baudrate(h5->hu->serdev, 115200); in h5_btrtl_open()
928 gpiod_set_value_cansleep(h5->enable_gpio, 1); in h5_btrtl_open()
929 gpiod_set_value_cansleep(h5->device_wake_gpio, 1); in h5_btrtl_open()
935 gpiod_set_value_cansleep(h5->device_wake_gpio, 0); in h5_btrtl_close()
936 gpiod_set_value_cansleep(h5->enable_gpio, 0); in h5_btrtl_close()
940 * suspend/resume, causing it to lose its firmware and all state. So we simply
947 serdev_device_set_flow_control(h5->hu->serdev, false); in h5_btrtl_suspend()
948 gpiod_set_value_cansleep(h5->device_wake_gpio, 0); in h5_btrtl_suspend()
949 gpiod_set_value_cansleep(h5->enable_gpio, 0); in h5_btrtl_suspend()
964 ret = device_reprobe(reprobe->dev); in h5_btrtl_reprobe_worker()
965 if (ret && ret != -EPROBE_DEFER) in h5_btrtl_reprobe_worker()
966 dev_err(reprobe->dev, "Reprobe error %d\n", ret); in h5_btrtl_reprobe_worker()
968 put_device(reprobe->dev); in h5_btrtl_reprobe_worker()
979 return -ENOMEM; in h5_btrtl_resume()
983 INIT_WORK(&reprobe->work, h5_btrtl_reprobe_worker); in h5_btrtl_resume()
984 reprobe->dev = get_device(&h5->hu->serdev->dev); in h5_btrtl_resume()
985 queue_work(system_long_wq, &reprobe->work); in h5_btrtl_resume()
993 { "device-wake-gpios", &btrtl_device_wake_gpios, 1 },
994 { "enable-gpios", &btrtl_enable_gpios, 1 },
995 { "host-wake-gpios", &btrtl_host_wake_gpios, 1 },
1025 { .compatible = "realtek,rtl8822cs-bt",
1027 { .compatible = "realtek,rtl8723bs-bt",