Lines Matching +full:serial +full:- +full:clk +full:- +full:low
1 // SPDX-License-Identifier: GPL-2.0
5 * Bluetooth support for MediaTek serial devices
13 #include <linux/clk.h>
58 struct clk *clk; member
59 struct clk *osc;
84 ((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
86 !((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
100 hlen = sizeof(*hdr) + wmt_params->dlen; in mtk_hci_wmt_sync()
102 err = -EINVAL; in mtk_hci_wmt_sync()
108 err = -ENOMEM; in mtk_hci_wmt_sync()
112 hdr = &wc->hdr; in mtk_hci_wmt_sync()
113 hdr->dir = 1; in mtk_hci_wmt_sync()
114 hdr->op = wmt_params->op; in mtk_hci_wmt_sync()
115 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1); in mtk_hci_wmt_sync()
116 hdr->flag = wmt_params->flag; in mtk_hci_wmt_sync()
117 memcpy(wc->data, wmt_params->data, wmt_params->dlen); in mtk_hci_wmt_sync()
119 set_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); in mtk_hci_wmt_sync()
123 clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); in mtk_hci_wmt_sync()
136 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT, in mtk_hci_wmt_sync()
138 if (err == -EINTR) { in mtk_hci_wmt_sync()
140 clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); in mtk_hci_wmt_sync()
146 clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); in mtk_hci_wmt_sync()
147 err = -ETIMEDOUT; in mtk_hci_wmt_sync()
152 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data; in mtk_hci_wmt_sync()
153 if (wmt_evt->whdr.op != hdr->op) { in mtk_hci_wmt_sync()
155 wmt_evt->whdr.op, hdr->op); in mtk_hci_wmt_sync()
156 err = -EIO; in mtk_hci_wmt_sync()
160 switch (wmt_evt->whdr.op) { in mtk_hci_wmt_sync()
162 if (wmt_evt->whdr.flag == 2) in mtk_hci_wmt_sync()
169 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404) in mtk_hci_wmt_sync()
171 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420) in mtk_hci_wmt_sync()
178 if (wmt_params->status) in mtk_hci_wmt_sync()
179 *wmt_params->status = status; in mtk_hci_wmt_sync()
184 kfree_skb(bdev->evt_skb); in mtk_hci_wmt_sync()
185 bdev->evt_skb = NULL; in mtk_hci_wmt_sync()
193 struct hci_event_hdr *hdr = (void *)skb->data; in btmtkuart_recv_event()
199 if (test_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state)) { in btmtkuart_recv_event()
200 bdev->evt_skb = skb_clone(skb, GFP_KERNEL); in btmtkuart_recv_event()
201 if (!bdev->evt_skb) { in btmtkuart_recv_event()
202 err = -ENOMEM; in btmtkuart_recv_event()
211 if (hdr->evt == HCI_EV_WMT) { in btmtkuart_recv_event()
213 &bdev->tx_state)) { in btmtkuart_recv_event()
216 wake_up_bit(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT); in btmtkuart_recv_event()
223 kfree_skb(bdev->evt_skb); in btmtkuart_recv_event()
224 bdev->evt_skb = NULL; in btmtkuart_recv_event()
240 struct serdev_device *serdev = bdev->serdev; in btmtkuart_tx_work()
241 struct hci_dev *hdev = bdev->hdev; in btmtkuart_tx_work()
244 clear_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); in btmtkuart_tx_work()
247 struct sk_buff *skb = skb_dequeue(&bdev->txq); in btmtkuart_tx_work()
253 len = serdev_device_write_buf(serdev, skb->data, in btmtkuart_tx_work()
254 skb->len); in btmtkuart_tx_work()
255 hdev->stat.byte_tx += len; in btmtkuart_tx_work()
258 if (skb->len > 0) { in btmtkuart_tx_work()
259 skb_queue_head(&bdev->txq, skb); in btmtkuart_tx_work()
265 hdev->stat.cmd_tx++; in btmtkuart_tx_work()
268 hdev->stat.acl_tx++; in btmtkuart_tx_work()
271 hdev->stat.sco_tx++; in btmtkuart_tx_work()
278 if (!test_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state)) in btmtkuart_tx_work()
282 clear_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state); in btmtkuart_tx_work()
287 if (test_and_set_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state)) in btmtkuart_tx_wakeup()
288 set_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); in btmtkuart_tx_wakeup()
290 schedule_work(&bdev->tx_work); in btmtkuart_tx_wakeup()
300 if (!bdev->stp_dlen && bdev->stp_cursor >= 6) in mtk_stp_split()
301 bdev->stp_cursor = 0; in mtk_stp_split()
304 while (bdev->stp_cursor < 6 && count > 0) { in mtk_stp_split()
305 bdev->stp_pad[bdev->stp_cursor] = *data; in mtk_stp_split()
306 bdev->stp_cursor++; in mtk_stp_split()
308 count--; in mtk_stp_split()
312 if (!bdev->stp_dlen && bdev->stp_cursor >= 6) { in mtk_stp_split()
313 shdr = (struct mtk_stp_hdr *)&bdev->stp_pad[2]; in mtk_stp_split()
314 bdev->stp_dlen = be16_to_cpu(shdr->dlen) & 0x0fff; in mtk_stp_split()
317 if (shdr->prefix != 0x80 || bdev->stp_dlen > 2048) { in mtk_stp_split()
318 bt_dev_err(bdev->hdev, "stp format unexpect (%d, %d)", in mtk_stp_split()
319 shdr->prefix, bdev->stp_dlen); in mtk_stp_split()
320 bdev->stp_cursor = 2; in mtk_stp_split()
321 bdev->stp_dlen = 0; in mtk_stp_split()
330 *sz_h4 = min_t(int, count, bdev->stp_dlen); in mtk_stp_split()
333 bdev->stp_dlen -= *sz_h4; in mtk_stp_split()
347 /* The serial data received from MT7622 BT controller is in btmtkuart_recv()
351 * ----------------------------------- in btmtkuart_recv()
353 * ----------------------------------- in btmtkuart_recv()
366 adv = p_h4 - p_left; in btmtkuart_recv()
367 sz_left -= adv; in btmtkuart_recv()
370 bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, p_h4, in btmtkuart_recv()
373 if (IS_ERR(bdev->rx_skb)) { in btmtkuart_recv()
374 err = PTR_ERR(bdev->rx_skb); in btmtkuart_recv()
375 bt_dev_err(bdev->hdev, in btmtkuart_recv()
377 bdev->rx_skb = NULL; in btmtkuart_recv()
381 sz_left -= sz_h4; in btmtkuart_recv()
391 btmtkuart_recv(bdev->hdev, data, count); in btmtkuart_receive_buf()
393 bdev->hdev->stat.byte_rx += count; in btmtkuart_receive_buf()
416 err = serdev_device_open(bdev->serdev); in btmtkuart_open()
419 dev_name(&bdev->serdev->dev)); in btmtkuart_open()
424 if (bdev->curr_speed != bdev->desired_speed) in btmtkuart_open()
425 err = serdev_device_set_baudrate(bdev->serdev, in btmtkuart_open()
428 err = serdev_device_set_baudrate(bdev->serdev, in btmtkuart_open()
429 bdev->desired_speed); in btmtkuart_open()
433 dev_name(&bdev->serdev->dev)); in btmtkuart_open()
437 serdev_device_set_flow_control(bdev->serdev, false); in btmtkuart_open()
440 bdev->stp_cursor = 2; in btmtkuart_open()
441 bdev->stp_dlen = 0; in btmtkuart_open()
443 dev = &bdev->serdev->dev; in btmtkuart_open()
451 err = clk_prepare_enable(bdev->clk); in btmtkuart_open()
462 serdev_device_close(bdev->serdev); in btmtkuart_open()
470 struct device *dev = &bdev->serdev->dev; in btmtkuart_close()
473 clk_disable_unprepare(bdev->clk); in btmtkuart_close()
477 serdev_device_close(bdev->serdev); in btmtkuart_close()
487 serdev_device_write_flush(bdev->serdev); in btmtkuart_flush()
488 skb_queue_purge(&bdev->txq); in btmtkuart_flush()
490 cancel_work_sync(&bdev->tx_work); in btmtkuart_flush()
492 kfree_skb(bdev->rx_skb); in btmtkuart_flush()
493 bdev->rx_skb = NULL; in btmtkuart_flush()
495 bdev->stp_cursor = 2; in btmtkuart_flush()
496 bdev->stp_dlen = 0; in btmtkuart_flush()
534 baudrate = cpu_to_le32(bdev->desired_speed); in btmtkuart_change_baudrate()
547 err = serdev_device_set_baudrate(bdev->serdev, in btmtkuart_change_baudrate()
548 bdev->desired_speed); in btmtkuart_change_baudrate()
555 serdev_device_set_flow_control(bdev->serdev, false); in btmtkuart_change_baudrate()
559 err = serdev_device_write_buf(bdev->serdev, ¶m, sizeof(param)); in btmtkuart_change_baudrate()
563 serdev_device_wait_until_sent(bdev->serdev, 0); in btmtkuart_change_baudrate()
582 bdev->curr_speed = bdev->desired_speed; in btmtkuart_change_baudrate()
603 if (test_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state)) { in btmtkuart_setup()
616 clear_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state); in btmtkuart_setup()
641 err = btmtk_setup_firmware(hdev, bdev->data->fwname, mtk_hci_wmt_sync); in btmtkuart_setup()
650 /* -ETIMEDOUT happens */ in btmtkuart_setup()
677 /* Apply the low power environment setup */ in btmtkuart_setup()
688 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); in btmtkuart_setup()
743 dlen = skb->len; in btmtkuart_send_frame()
745 shdr->prefix = 0x80; in btmtkuart_send_frame()
746 shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12)); in btmtkuart_send_frame()
747 shdr->cs = 0; /* MT7622 doesn't care about checksum value */ in btmtkuart_send_frame()
752 skb_queue_tail(&bdev->txq, skb); in btmtkuart_send_frame()
761 struct device_node *node = serdev->dev.of_node; in btmtkuart_parse_dt()
766 of_property_read_u32(node, "current-speed", &speed); in btmtkuart_parse_dt()
768 bdev->desired_speed = speed; in btmtkuart_parse_dt()
770 bdev->vcc = devm_regulator_get(&serdev->dev, "vcc"); in btmtkuart_parse_dt()
771 if (IS_ERR(bdev->vcc)) { in btmtkuart_parse_dt()
772 err = PTR_ERR(bdev->vcc); in btmtkuart_parse_dt()
776 bdev->osc = devm_clk_get_optional(&serdev->dev, "osc"); in btmtkuart_parse_dt()
777 if (IS_ERR(bdev->osc)) { in btmtkuart_parse_dt()
778 err = PTR_ERR(bdev->osc); in btmtkuart_parse_dt()
782 bdev->boot = devm_gpiod_get_optional(&serdev->dev, "boot", in btmtkuart_parse_dt()
784 if (IS_ERR(bdev->boot)) { in btmtkuart_parse_dt()
785 err = PTR_ERR(bdev->boot); in btmtkuart_parse_dt()
789 bdev->pinctrl = devm_pinctrl_get(&serdev->dev); in btmtkuart_parse_dt()
790 if (IS_ERR(bdev->pinctrl)) { in btmtkuart_parse_dt()
791 err = PTR_ERR(bdev->pinctrl); in btmtkuart_parse_dt()
795 bdev->pins_boot = pinctrl_lookup_state(bdev->pinctrl, in btmtkuart_parse_dt()
797 if (IS_ERR(bdev->pins_boot) && !bdev->boot) { in btmtkuart_parse_dt()
798 err = PTR_ERR(bdev->pins_boot); in btmtkuart_parse_dt()
799 dev_err(&serdev->dev, in btmtkuart_parse_dt()
800 "Should assign RXD to LOW at boot stage\n"); in btmtkuart_parse_dt()
804 bdev->pins_runtime = pinctrl_lookup_state(bdev->pinctrl, in btmtkuart_parse_dt()
806 if (IS_ERR(bdev->pins_runtime)) { in btmtkuart_parse_dt()
807 err = PTR_ERR(bdev->pins_runtime); in btmtkuart_parse_dt()
811 bdev->reset = devm_gpiod_get_optional(&serdev->dev, "reset", in btmtkuart_parse_dt()
813 if (IS_ERR(bdev->reset)) { in btmtkuart_parse_dt()
814 err = PTR_ERR(bdev->reset); in btmtkuart_parse_dt()
818 bdev->clk = devm_clk_get(&serdev->dev, "ref"); in btmtkuart_parse_dt()
819 if (IS_ERR(bdev->clk)) in btmtkuart_parse_dt()
820 return PTR_ERR(bdev->clk); in btmtkuart_parse_dt()
832 bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL); in btmtkuart_probe()
834 return -ENOMEM; in btmtkuart_probe()
836 bdev->data = of_device_get_match_data(&serdev->dev); in btmtkuart_probe()
837 if (!bdev->data) in btmtkuart_probe()
838 return -ENODEV; in btmtkuart_probe()
840 bdev->serdev = serdev; in btmtkuart_probe()
849 INIT_WORK(&bdev->tx_work, btmtkuart_tx_work); in btmtkuart_probe()
850 skb_queue_head_init(&bdev->txq); in btmtkuart_probe()
855 dev_err(&serdev->dev, "Can't allocate HCI device\n"); in btmtkuart_probe()
856 return -ENOMEM; in btmtkuart_probe()
859 bdev->hdev = hdev; in btmtkuart_probe()
861 hdev->bus = HCI_UART; in btmtkuart_probe()
864 hdev->open = btmtkuart_open; in btmtkuart_probe()
865 hdev->close = btmtkuart_close; in btmtkuart_probe()
866 hdev->flush = btmtkuart_flush; in btmtkuart_probe()
867 hdev->setup = btmtkuart_setup; in btmtkuart_probe()
868 hdev->shutdown = btmtkuart_shutdown; in btmtkuart_probe()
869 hdev->send = btmtkuart_send_frame; in btmtkuart_probe()
870 hdev->set_bdaddr = btmtk_set_bdaddr; in btmtkuart_probe()
871 SET_HCIDEV_DEV(hdev, &serdev->dev); in btmtkuart_probe()
873 hdev->manufacturer = 70; in btmtkuart_probe()
874 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); in btmtkuart_probe()
877 err = clk_prepare_enable(bdev->osc); in btmtkuart_probe()
881 if (bdev->boot) { in btmtkuart_probe()
882 gpiod_set_value_cansleep(bdev->boot, 1); in btmtkuart_probe()
887 pinctrl_select_state(bdev->pinctrl, bdev->pins_boot); in btmtkuart_probe()
891 err = regulator_enable(bdev->vcc); in btmtkuart_probe()
895 /* Reset if the reset-gpios is available otherwise the board in btmtkuart_probe()
896 * -level design should be guaranteed. in btmtkuart_probe()
898 if (bdev->reset) { in btmtkuart_probe()
899 gpiod_set_value_cansleep(bdev->reset, 1); in btmtkuart_probe()
901 gpiod_set_value_cansleep(bdev->reset, 0); in btmtkuart_probe()
909 if (bdev->boot) in btmtkuart_probe()
910 devm_gpiod_put(&serdev->dev, bdev->boot); in btmtkuart_probe()
912 pinctrl_select_state(bdev->pinctrl, bdev->pins_runtime); in btmtkuart_probe()
917 pm_runtime_no_callbacks(&serdev->dev); in btmtkuart_probe()
919 set_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state); in btmtkuart_probe()
924 dev_err(&serdev->dev, "Can't register HCI device\n"); in btmtkuart_probe()
932 regulator_disable(bdev->vcc); in btmtkuart_probe()
935 clk_disable_unprepare(bdev->osc); in btmtkuart_probe()
945 struct hci_dev *hdev = bdev->hdev; in btmtkuart_remove()
948 regulator_disable(bdev->vcc); in btmtkuart_remove()
949 clk_disable_unprepare(bdev->osc); in btmtkuart_remove()
972 { .compatible = "mediatek,mt7622-bluetooth", .data = &mt7622_data},
973 { .compatible = "mediatek,mt7663u-bluetooth", .data = &mt7663_data},
974 { .compatible = "mediatek,mt7668u-bluetooth", .data = &mt7668_data},
992 MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION);