// SPDX-License-Identifier: ISC /* Copyright (C) 2021 MediaTek Inc. * */ #include #include #include #include #include #include #include #include "btmtk.h" #define VERSION "0.1" /* It is for mt79xx download rom patch*/ #define MTK_FW_ROM_PATCH_HEADER_SIZE 32 #define MTK_FW_ROM_PATCH_GD_SIZE 64 #define MTK_FW_ROM_PATCH_SEC_MAP_SIZE 64 #define MTK_SEC_MAP_COMMON_SIZE 12 #define MTK_SEC_MAP_NEED_SEND_SIZE 52 /* It is for mt79xx iso data transmission setting */ #define MTK_ISO_THRESHOLD 264 struct btmtk_patch_header { u8 datetime[16]; u8 platform[4]; __le16 hwver; __le16 swver; __le32 magicnum; } __packed; struct btmtk_global_desc { __le32 patch_ver; __le32 sub_sys; __le32 feature_opt; __le32 section_num; } __packed; struct btmtk_section_map { __le32 sectype; __le32 secoffset; __le32 secsize; union { __le32 u4SecSpec[13]; struct { __le32 dlAddr; __le32 dlsize; __le32 seckeyidx; __le32 alignlen; __le32 sectype; __le32 dlmodecrctype; __le32 crc; __le32 reserved[6]; } bin_info_spec; }; } __packed; static void btmtk_coredump(struct hci_dev *hdev) { int err; err = __hci_cmd_send(hdev, 0xfd5b, 0, NULL); if (err < 0) bt_dev_err(hdev, "Coredump failed (%d)", err); } static void btmtk_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb) { struct btmtk_data *data = hci_get_priv(hdev); char buf[80]; snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n", data->dev_id); skb_put_data(skb, buf, strlen(buf)); snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n", data->cd_info.fw_version); skb_put_data(skb, buf, strlen(buf)); snprintf(buf, sizeof(buf), "Driver: %s\n", data->cd_info.driver_name); skb_put_data(skb, buf, strlen(buf)); snprintf(buf, sizeof(buf), "Vendor: MediaTek\n"); skb_put_data(skb, buf, strlen(buf)); } static void btmtk_coredump_notify(struct hci_dev *hdev, int state) { struct btmtk_data *data = hci_get_priv(hdev); switch (state) { case HCI_DEVCOREDUMP_IDLE: data->cd_info.state = HCI_DEVCOREDUMP_IDLE; break; case HCI_DEVCOREDUMP_ACTIVE: data->cd_info.state = HCI_DEVCOREDUMP_ACTIVE; break; case HCI_DEVCOREDUMP_TIMEOUT: case HCI_DEVCOREDUMP_ABORT: case HCI_DEVCOREDUMP_DONE: data->cd_info.state = HCI_DEVCOREDUMP_IDLE; btmtk_reset_sync(hdev); break; } } void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver, u32 fw_flavor) { if (dev_id == 0x7925) snprintf(buf, size, "mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", dev_id & 0xffff, dev_id & 0xffff, (fw_ver & 0xff) + 1); else if (dev_id == 0x7961 && fw_flavor) snprintf(buf, size, "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin", dev_id & 0xffff, (fw_ver & 0xff) + 1); else snprintf(buf, size, "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", dev_id & 0xffff, (fw_ver & 0xff) + 1); } EXPORT_SYMBOL_GPL(btmtk_fw_get_filename); int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname, wmt_cmd_sync_func_t wmt_cmd_sync) { struct btmtk_hci_wmt_params wmt_params; struct btmtk_patch_header *hdr; struct btmtk_global_desc *globaldesc = NULL; struct btmtk_section_map *sectionmap; const struct firmware *fw; const u8 *fw_ptr; const u8 *fw_bin_ptr; int err, dlen, i, status; u8 flag, first_block, retry; u32 section_num, dl_size, section_offset; u8 cmd[64]; err = request_firmware(&fw, fwname, &hdev->dev); if (err < 0) { bt_dev_err(hdev, "Failed to load firmware file (%d)", err); return err; } fw_ptr = fw->data; fw_bin_ptr = fw_ptr; hdr = (struct btmtk_patch_header *)fw_ptr; globaldesc = (struct btmtk_global_desc *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE); section_num = le32_to_cpu(globaldesc->section_num); bt_dev_info(hdev, "HW/SW Version: 0x%04x%04x, Build Time: %s", le16_to_cpu(hdr->hwver), le16_to_cpu(hdr->swver), hdr->datetime); for (i = 0; i < section_num; i++) { first_block = 1; fw_ptr = fw_bin_ptr; sectionmap = (struct btmtk_section_map *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE + MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i); section_offset = le32_to_cpu(sectionmap->secoffset); dl_size = le32_to_cpu(sectionmap->bin_info_spec.dlsize); if (dl_size > 0) { retry = 20; while (retry > 0) { cmd[0] = 0; /* 0 means legacy dl mode. */ memcpy(cmd + 1, fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE + MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i + MTK_SEC_MAP_COMMON_SIZE, MTK_SEC_MAP_NEED_SEND_SIZE + 1); wmt_params.op = BTMTK_WMT_PATCH_DWNLD; wmt_params.status = &status; wmt_params.flag = 0; wmt_params.dlen = MTK_SEC_MAP_NEED_SEND_SIZE + 1; wmt_params.data = &cmd; err = wmt_cmd_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", err); goto err_release_fw; } if (status == BTMTK_WMT_PATCH_UNDONE) { break; } else if (status == BTMTK_WMT_PATCH_PROGRESS) { msleep(100); retry--; } else if (status == BTMTK_WMT_PATCH_DONE) { goto next_section; } else { bt_dev_err(hdev, "Failed wmt patch dwnld status (%d)", status); err = -EIO; goto err_release_fw; } } fw_ptr += section_offset; wmt_params.op = BTMTK_WMT_PATCH_DWNLD; wmt_params.status = NULL; while (dl_size > 0) { dlen = min_t(int, 250, dl_size); if (first_block == 1) { flag = 1; first_block = 0; } else if (dl_size - dlen <= 0) { flag = 3; } else { flag = 2; } wmt_params.flag = flag; wmt_params.dlen = dlen; wmt_params.data = fw_ptr; err = wmt_cmd_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", err); goto err_release_fw; } dl_size -= dlen; fw_ptr += dlen; } } next_section: continue; } /* Wait a few moments for firmware activation done */ usleep_range(100000, 120000); err_release_fw: release_firmware(fw); return err; } EXPORT_SYMBOL_GPL(btmtk_setup_firmware_79xx); int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname, wmt_cmd_sync_func_t wmt_cmd_sync) { struct btmtk_hci_wmt_params wmt_params; const struct firmware *fw; const u8 *fw_ptr; size_t fw_size; int err, dlen; u8 flag, param; err = request_firmware(&fw, fwname, &hdev->dev); if (err < 0) { bt_dev_err(hdev, "Failed to load firmware file (%d)", err); return err; } /* Power on data RAM the firmware relies on. */ param = 1; wmt_params.op = BTMTK_WMT_FUNC_CTRL; wmt_params.flag = 3; wmt_params.dlen = sizeof(param); wmt_params.data = ¶m; wmt_params.status = NULL; err = wmt_cmd_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to power on data RAM (%d)", err); goto err_release_fw; } fw_ptr = fw->data; fw_size = fw->size; /* The size of patch header is 30 bytes, should be skip */ if (fw_size < 30) { err = -EINVAL; goto err_release_fw; } fw_size -= 30; fw_ptr += 30; flag = 1; wmt_params.op = BTMTK_WMT_PATCH_DWNLD; wmt_params.status = NULL; while (fw_size > 0) { dlen = min_t(int, 250, fw_size); /* Tell device the position in sequence */ if (fw_size - dlen <= 0) flag = 3; else if (fw_size < fw->size - 30) flag = 2; wmt_params.flag = flag; wmt_params.dlen = dlen; wmt_params.data = fw_ptr; err = wmt_cmd_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", err); goto err_release_fw; } fw_size -= dlen; fw_ptr += dlen; } wmt_params.op = BTMTK_WMT_RST; wmt_params.flag = 4; wmt_params.dlen = 0; wmt_params.data = NULL; wmt_params.status = NULL; /* Activate function the firmware providing to */ err = wmt_cmd_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt rst (%d)", err); goto err_release_fw; } /* Wait a few moments for firmware activation done */ usleep_range(10000, 12000); err_release_fw: release_firmware(fw); return err; } EXPORT_SYMBOL_GPL(btmtk_setup_firmware); int btmtk_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) { struct sk_buff *skb; long ret; skb = __hci_cmd_sync(hdev, 0xfc1a, 6, bdaddr, HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { ret = PTR_ERR(skb); bt_dev_err(hdev, "changing Mediatek device address failed (%ld)", ret); return ret; } kfree_skb(skb); return 0; } EXPORT_SYMBOL_GPL(btmtk_set_bdaddr); void btmtk_reset_sync(struct hci_dev *hdev) { struct btmtk_data *reset_work = hci_get_priv(hdev); int err; hci_dev_lock(hdev); err = hci_cmd_sync_queue(hdev, reset_work->reset_sync, NULL, NULL); if (err) bt_dev_err(hdev, "failed to reset (%d)", err); hci_dev_unlock(hdev); } EXPORT_SYMBOL_GPL(btmtk_reset_sync); int btmtk_register_coredump(struct hci_dev *hdev, const char *name, u32 fw_version) { struct btmtk_data *data = hci_get_priv(hdev); if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) return -EOPNOTSUPP; data->cd_info.fw_version = fw_version; data->cd_info.state = HCI_DEVCOREDUMP_IDLE; data->cd_info.driver_name = name; return hci_devcd_register(hdev, btmtk_coredump, btmtk_coredump_hdr, btmtk_coredump_notify); } EXPORT_SYMBOL_GPL(btmtk_register_coredump); int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb) { struct btmtk_data *data = hci_get_priv(hdev); int err; if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) { kfree_skb(skb); return 0; } switch (data->cd_info.state) { case HCI_DEVCOREDUMP_IDLE: err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE); if (err < 0) { kfree_skb(skb); break; } data->cd_info.cnt = 0; /* It is supposed coredump can be done within 5 seconds */ schedule_delayed_work(&hdev->dump.dump_timeout, msecs_to_jiffies(5000)); fallthrough; case HCI_DEVCOREDUMP_ACTIVE: default: err = hci_devcd_append(hdev, skb); if (err < 0) break; data->cd_info.cnt++; /* Mediatek coredump data would be more than MTK_COREDUMP_NUM */ if (data->cd_info.cnt > MTK_COREDUMP_NUM && skb->len > MTK_COREDUMP_END_LEN) if (!memcmp((char *)&skb->data[skb->len - MTK_COREDUMP_END_LEN], MTK_COREDUMP_END, MTK_COREDUMP_END_LEN - 1)) { bt_dev_info(hdev, "Mediatek coredump end"); hci_devcd_complete(hdev); } break; } return err; } EXPORT_SYMBOL_GPL(btmtk_process_coredump); #if IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) static void btmtk_usb_wmt_recv(struct urb *urb) { struct hci_dev *hdev = urb->context; struct btmtk_data *data = hci_get_priv(hdev); struct sk_buff *skb; int err; if (urb->status == 0 && urb->actual_length > 0) { hdev->stat.byte_rx += urb->actual_length; /* WMT event shouldn't be fragmented and the size should be * less than HCI_WMT_MAX_EVENT_SIZE. */ skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC); if (!skb) { hdev->stat.err_rx++; kfree(urb->setup_packet); return; } hci_skb_pkt_type(skb) = HCI_EVENT_PKT; skb_put_data(skb, urb->transfer_buffer, urb->actual_length); /* When someone waits for the WMT event, the skb is being cloned * and being processed the events from there then. */ if (test_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) { data->evt_skb = skb_clone(skb, GFP_ATOMIC); if (!data->evt_skb) { kfree_skb(skb); kfree(urb->setup_packet); return; } } err = hci_recv_frame(hdev, skb); if (err < 0) { kfree_skb(data->evt_skb); data->evt_skb = NULL; kfree(urb->setup_packet); return; } if (test_and_clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) { /* Barrier to sync with other CPUs */ smp_mb__after_atomic(); wake_up_bit(&data->flags, BTMTK_TX_WAIT_VND_EVT); } kfree(urb->setup_packet); return; } else if (urb->status == -ENOENT) { /* Avoid suspend failed when usb_kill_urb */ return; } usb_mark_last_busy(data->udev); /* The URB complete handler is still called with urb->actual_length = 0 * when the event is not available, so we should keep re-submitting * URB until WMT event returns, Also, It's necessary to wait some time * between the two consecutive control URBs to relax the target device * to generate the event. Otherwise, the WMT event cannot return from * the device successfully. */ udelay(500); usb_anchor_urb(urb, data->ctrl_anchor); err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) { kfree(urb->setup_packet); /* -EPERM: urb is being killed; * -ENODEV: device got disconnected */ if (err != -EPERM && err != -ENODEV) bt_dev_err(hdev, "urb %p failed to resubmit (%d)", urb, -err); usb_unanchor_urb(urb); } } static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev) { struct btmtk_data *data = hci_get_priv(hdev); struct usb_ctrlrequest *dr; unsigned char *buf; int err, size = 64; unsigned int pipe; struct urb *urb; urb = usb_alloc_urb(0, GFP_KERNEL); if (!urb) return -ENOMEM; dr = kmalloc(sizeof(*dr), GFP_KERNEL); if (!dr) { usb_free_urb(urb); return -ENOMEM; } dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN; dr->bRequest = 1; dr->wIndex = cpu_to_le16(0); dr->wValue = cpu_to_le16(48); dr->wLength = cpu_to_le16(size); buf = kmalloc(size, GFP_KERNEL); if (!buf) { kfree(dr); usb_free_urb(urb); return -ENOMEM; } pipe = usb_rcvctrlpipe(data->udev, 0); usb_fill_control_urb(urb, data->udev, pipe, (void *)dr, buf, size, btmtk_usb_wmt_recv, hdev); urb->transfer_flags |= URB_FREE_BUFFER; usb_anchor_urb(urb, data->ctrl_anchor); err = usb_submit_urb(urb, GFP_KERNEL); if (err < 0) { if (err != -EPERM && err != -ENODEV) bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err); usb_unanchor_urb(urb); } usb_free_urb(urb); return err; } static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev, struct btmtk_hci_wmt_params *wmt_params) { struct btmtk_data *data = hci_get_priv(hdev); struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc; u32 hlen, status = BTMTK_WMT_INVALID; struct btmtk_hci_wmt_evt *wmt_evt; struct btmtk_hci_wmt_cmd *wc; struct btmtk_wmt_hdr *hdr; int err; /* Send the WMT command and wait until the WMT event returns */ hlen = sizeof(*hdr) + wmt_params->dlen; if (hlen > 255) return -EINVAL; wc = kzalloc(hlen, GFP_KERNEL); if (!wc) return -ENOMEM; hdr = &wc->hdr; hdr->dir = 1; hdr->op = wmt_params->op; hdr->dlen = cpu_to_le16(wmt_params->dlen + 1); hdr->flag = wmt_params->flag; memcpy(wc->data, wmt_params->data, wmt_params->dlen); set_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); /* WMT cmd/event doesn't follow up the generic HCI cmd/event handling, * it needs constantly polling control pipe until the host received the * WMT event, thus, we should require to specifically acquire PM counter * on the USB to prevent the interface from entering auto suspended * while WMT cmd/event in progress. */ err = usb_autopm_get_interface(data->intf); if (err < 0) goto err_free_wc; err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc); if (err < 0) { clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); usb_autopm_put_interface(data->intf); goto err_free_wc; } /* Submit control IN URB on demand to process the WMT event */ err = btmtk_usb_submit_wmt_recv_urb(hdev); usb_autopm_put_interface(data->intf); if (err < 0) goto err_free_wc; /* The vendor specific WMT commands are all answered by a vendor * specific event and will have the Command Status or Command * Complete as with usual HCI command flow control. * * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT * state to be cleared. The driver specific event receive routine * will clear that state and with that indicate completion of the * WMT command. */ err = wait_on_bit_timeout(&data->flags, BTMTK_TX_WAIT_VND_EVT, TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT); if (err == -EINTR) { bt_dev_err(hdev, "Execution of wmt command interrupted"); clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); goto err_free_wc; } if (err) { bt_dev_err(hdev, "Execution of wmt command timed out"); clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); err = -ETIMEDOUT; goto err_free_wc; } if (data->evt_skb == NULL) goto err_free_wc; /* Parse and handle the return WMT event */ wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data; if (wmt_evt->whdr.op != hdr->op) { bt_dev_err(hdev, "Wrong op received %d expected %d", wmt_evt->whdr.op, hdr->op); err = -EIO; goto err_free_skb; } switch (wmt_evt->whdr.op) { case BTMTK_WMT_SEMAPHORE: if (wmt_evt->whdr.flag == 2) status = BTMTK_WMT_PATCH_UNDONE; else status = BTMTK_WMT_PATCH_DONE; break; case BTMTK_WMT_FUNC_CTRL: wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt; if (be16_to_cpu(wmt_evt_funcc->status) == 0x404) status = BTMTK_WMT_ON_DONE; else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420) status = BTMTK_WMT_ON_PROGRESS; else status = BTMTK_WMT_ON_UNDONE; break; case BTMTK_WMT_PATCH_DWNLD: if (wmt_evt->whdr.flag == 2) status = BTMTK_WMT_PATCH_DONE; else if (wmt_evt->whdr.flag == 1) status = BTMTK_WMT_PATCH_PROGRESS; else status = BTMTK_WMT_PATCH_UNDONE; break; } if (wmt_params->status) *wmt_params->status = status; err_free_skb: kfree_skb(data->evt_skb); data->evt_skb = NULL; err_free_wc: kfree(wc); return err; } static int btmtk_usb_func_query(struct hci_dev *hdev) { struct btmtk_hci_wmt_params wmt_params; int status, err; u8 param = 0; /* Query whether the function is enabled */ wmt_params.op = BTMTK_WMT_FUNC_CTRL; wmt_params.flag = 4; wmt_params.dlen = sizeof(param); wmt_params.data = ¶m; wmt_params.status = &status; err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to query function status (%d)", err); return err; } return status; } static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val) { struct btmtk_data *data = hci_get_priv(hdev); int pipe, err; void *buf; buf = kzalloc(4, GFP_KERNEL); if (!buf) return -ENOMEM; put_unaligned_le32(val, buf); pipe = usb_sndctrlpipe(data->udev, 0); err = usb_control_msg(data->udev, pipe, 0x02, 0x5E, reg >> 16, reg & 0xffff, buf, 4, USB_CTRL_SET_TIMEOUT); if (err < 0) bt_dev_err(hdev, "Failed to write uhw reg(%d)", err); kfree(buf); return err; } static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) { struct btmtk_data *data = hci_get_priv(hdev); int pipe, err; void *buf; buf = kzalloc(4, GFP_KERNEL); if (!buf) return -ENOMEM; pipe = usb_rcvctrlpipe(data->udev, 0); err = usb_control_msg(data->udev, pipe, 0x01, 0xDE, reg >> 16, reg & 0xffff, buf, 4, USB_CTRL_GET_TIMEOUT); if (err < 0) { bt_dev_err(hdev, "Failed to read uhw reg(%d)", err); goto err_free_buf; } *val = get_unaligned_le32(buf); bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val); err_free_buf: kfree(buf); return err; } static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) { struct btmtk_data *data = hci_get_priv(hdev); int pipe, err, size = sizeof(u32); void *buf; buf = kzalloc(size, GFP_KERNEL); if (!buf) return -ENOMEM; pipe = usb_rcvctrlpipe(data->udev, 0); err = usb_control_msg(data->udev, pipe, 0x63, USB_TYPE_VENDOR | USB_DIR_IN, reg >> 16, reg & 0xffff, buf, size, USB_CTRL_GET_TIMEOUT); if (err < 0) goto err_free_buf; *val = get_unaligned_le32(buf); err_free_buf: kfree(buf); return err; } static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id) { return btmtk_usb_reg_read(hdev, reg, id); } static u32 btmtk_usb_reset_done(struct hci_dev *hdev) { u32 val = 0; btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val); return val & MTK_BT_RST_DONE; } int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id) { u32 val; int err; if (dev_id == 0x7922) { err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val); if (err < 0) return err; val |= 0x00002020; err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val); if (err < 0) return err; err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val); if (err < 0) return err; val |= BIT(0); err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val); if (err < 0) return err; msleep(100); } else if (dev_id == 0x7925) { err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val); if (err < 0) return err; val |= (1 << 5); err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val); if (err < 0) return err; val &= 0xFFFF00FF; val |= (1 << 13); err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val); if (err < 0) return err; err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val); if (err < 0) return err; val |= (1 << 0); err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val); if (err < 0) return err; err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val); if (err < 0) return err; err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val); if (err < 0) return err; msleep(100); } else { /* It's Device EndPoint Reset Option Register */ bt_dev_dbg(hdev, "Initiating reset mechanism via uhw"); err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val); if (err < 0) return err; /* Reset the bluetooth chip via USB interface. */ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1); if (err < 0) return err; err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val); if (err < 0) return err; err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val); if (err < 0) return err; /* MT7921 need to delay 20ms between toggle reset bit */ msleep(20); err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0); if (err < 0) return err; err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val); if (err < 0) return err; } err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val, val & MTK_BT_RST_DONE, 20000, 1000000); if (err < 0) bt_dev_err(hdev, "Reset timeout"); if (dev_id == 0x7922) { err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF); if (err < 0) return err; } err = btmtk_usb_id_get(hdev, 0x70010200, &val); if (err < 0 || !val) bt_dev_err(hdev, "Can't get device id, subsys reset fail."); return err; } EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset); int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) { struct btmtk_data *data = hci_get_priv(hdev); u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle); switch (handle) { case 0xfc6f: /* Firmware dump from device */ /* When the firmware hangs, the device can no longer * suspend and thus disable auto-suspend. */ usb_disable_autosuspend(data->udev); /* We need to forward the diagnostic packet to userspace daemon * for backward compatibility, so we have to clone the packet * extraly for the in-kernel coredump support. */ if (IS_ENABLED(CONFIG_DEV_COREDUMP)) { struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC); if (skb_cd) btmtk_process_coredump(hdev, skb_cd); } fallthrough; case 0x05ff: /* Firmware debug logging 1 */ case 0x05fe: /* Firmware debug logging 2 */ return hci_recv_diag(hdev, skb); } return hci_recv_frame(hdev, skb); } EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl); static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb) { if (skb->len > MTK_ISO_THRESHOLD) return -EINVAL; if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len)) return -ENOMEM; __skb_put(skb, MTK_ISO_THRESHOLD - skb->len); return 0; } static int __set_mtk_intr_interface(struct hci_dev *hdev) { struct btmtk_data *btmtk_data = hci_get_priv(hdev); struct usb_interface *intf = btmtk_data->isopkt_intf; int i, err; if (!btmtk_data->isopkt_intf) return -ENODEV; err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1); if (err < 0) { bt_dev_err(hdev, "setting interface failed (%d)", -err); return err; } btmtk_data->isopkt_tx_ep = NULL; btmtk_data->isopkt_rx_ep = NULL; for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { struct usb_endpoint_descriptor *ep_desc; ep_desc = &intf->cur_altsetting->endpoint[i].desc; if (!btmtk_data->isopkt_tx_ep && usb_endpoint_is_int_out(ep_desc)) { btmtk_data->isopkt_tx_ep = ep_desc; continue; } if (!btmtk_data->isopkt_rx_ep && usb_endpoint_is_int_in(ep_desc)) { btmtk_data->isopkt_rx_ep = ep_desc; continue; } } if (!btmtk_data->isopkt_tx_ep || !btmtk_data->isopkt_rx_ep) { bt_dev_err(hdev, "invalid interrupt descriptors"); return -ENODEV; } return 0; } struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb, usb_complete_t tx_complete) { struct btmtk_data *btmtk_data = hci_get_priv(hdev); struct urb *urb; unsigned int pipe; if (!btmtk_data->isopkt_tx_ep) return ERR_PTR(-ENODEV); urb = usb_alloc_urb(0, GFP_KERNEL); if (!urb) return ERR_PTR(-ENOMEM); if (btmtk_isopkt_pad(hdev, skb)) return ERR_PTR(-EINVAL); pipe = usb_sndintpipe(btmtk_data->udev, btmtk_data->isopkt_tx_ep->bEndpointAddress); usb_fill_int_urb(urb, btmtk_data->udev, pipe, skb->data, skb->len, tx_complete, skb, btmtk_data->isopkt_tx_ep->bInterval); skb->dev = (void *)hdev; return urb; } EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb); static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count) { struct btmtk_data *btmtk_data = hci_get_priv(hdev); struct sk_buff *skb; unsigned long flags; int err = 0; spin_lock_irqsave(&btmtk_data->isorxlock, flags); skb = btmtk_data->isopkt_skb; while (count) { int len; if (!skb) { skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC); if (!skb) { err = -ENOMEM; break; } hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; hci_skb_expect(skb) = HCI_ISO_HDR_SIZE; } len = min_t(uint, hci_skb_expect(skb), count); skb_put_data(skb, buffer, len); count -= len; buffer += len; hci_skb_expect(skb) -= len; if (skb->len == HCI_ISO_HDR_SIZE) { __le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen; /* Complete ISO header */ hci_skb_expect(skb) = __le16_to_cpu(dlen); if (skb_tailroom(skb) < hci_skb_expect(skb)) { kfree_skb(skb); skb = NULL; err = -EILSEQ; break; } } if (!hci_skb_expect(skb)) { /* Complete frame */ hci_recv_frame(hdev, skb); skb = NULL; } } btmtk_data->isopkt_skb = skb; spin_unlock_irqrestore(&btmtk_data->isorxlock, flags); return err; } static void btmtk_intr_complete(struct urb *urb) { struct hci_dev *hdev = urb->context; struct btmtk_data *btmtk_data = hci_get_priv(hdev); int err; BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status, urb->actual_length); if (!test_bit(HCI_RUNNING, &hdev->flags)) return; if (hdev->suspended) return; if (urb->status == 0) { hdev->stat.byte_rx += urb->actual_length; if (btmtk_recv_isopkt(hdev, urb->transfer_buffer, urb->actual_length) < 0) { bt_dev_err(hdev, "corrupted iso packet"); hdev->stat.err_rx++; } } else if (urb->status == -ENOENT) { /* Avoid suspend failed when usb_kill_urb */ return; } usb_mark_last_busy(btmtk_data->udev); usb_anchor_urb(urb, &btmtk_data->isopkt_anchor); err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) { /* -EPERM: urb is being killed; * -ENODEV: device got disconnected */ if (err != -EPERM && err != -ENODEV) bt_dev_err(hdev, "urb %p failed to resubmit (%d)", urb, -err); if (err != -EPERM) hci_cmd_sync_cancel(hdev, -err); usb_unanchor_urb(urb); } } static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags) { struct btmtk_data *btmtk_data = hci_get_priv(hdev); unsigned char *buf; unsigned int pipe; struct urb *urb; int err, size; BT_DBG("%s", hdev->name); if (!btmtk_data->isopkt_rx_ep) return -ENODEV; urb = usb_alloc_urb(0, mem_flags); if (!urb) return -ENOMEM; size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize); buf = kmalloc(size, mem_flags); if (!buf) { usb_free_urb(urb); return -ENOMEM; } pipe = usb_rcvintpipe(btmtk_data->udev, btmtk_data->isopkt_rx_ep->bEndpointAddress); usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size, btmtk_intr_complete, hdev, btmtk_data->isopkt_rx_ep->bInterval); urb->transfer_flags |= URB_FREE_BUFFER; usb_mark_last_busy(btmtk_data->udev); usb_anchor_urb(urb, &btmtk_data->isopkt_anchor); err = usb_submit_urb(urb, mem_flags); if (err < 0) { if (err != -EPERM && err != -ENODEV) bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err); usb_unanchor_urb(urb); } usb_free_urb(urb); return err; } static int btmtk_usb_isointf_init(struct hci_dev *hdev) { struct btmtk_data *btmtk_data = hci_get_priv(hdev); u8 iso_param[2] = { 0x08, 0x01 }; struct sk_buff *skb; int err; spin_lock_init(&btmtk_data->isorxlock); __set_mtk_intr_interface(hdev); err = btmtk_submit_intr_urb(hdev, GFP_KERNEL); if (err < 0) { usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor); bt_dev_err(hdev, "ISO intf not support (%d)", err); return err; } skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param, HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb)); return PTR_ERR(skb); } kfree_skb(skb); return 0; } int btmtk_usb_resume(struct hci_dev *hdev) { /* This function describes the specific additional steps taken by MediaTek * when Bluetooth usb driver's resume function is called. */ struct btmtk_data *btmtk_data = hci_get_priv(hdev); /* Resubmit urb for iso data transmission */ if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) { if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0) clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags); } return 0; } EXPORT_SYMBOL_GPL(btmtk_usb_resume); int btmtk_usb_suspend(struct hci_dev *hdev) { /* This function describes the specific additional steps taken by MediaTek * when Bluetooth usb driver's suspend function is called. */ struct btmtk_data *btmtk_data = hci_get_priv(hdev); /* Stop urb anchor for iso data transmission */ if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor); return 0; } EXPORT_SYMBOL_GPL(btmtk_usb_suspend); int btmtk_usb_setup(struct hci_dev *hdev) { struct btmtk_data *btmtk_data = hci_get_priv(hdev); struct btmtk_hci_wmt_params wmt_params; ktime_t calltime, delta, rettime; struct btmtk_tci_sleep tci_sleep; unsigned long long duration; struct sk_buff *skb; const char *fwname; int err, status; u32 dev_id = 0; char fw_bin_name[64]; u32 fw_version = 0, fw_flavor = 0; u8 param; calltime = ktime_get(); err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id); if (err < 0) { bt_dev_err(hdev, "Failed to get device id (%d)", err); return err; } if (!dev_id || dev_id != 0x7663) { err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id); if (err < 0) { bt_dev_err(hdev, "Failed to get device id (%d)", err); return err; } err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version); if (err < 0) { bt_dev_err(hdev, "Failed to get fw version (%d)", err); return err; } err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor); if (err < 0) { bt_dev_err(hdev, "Failed to get fw flavor (%d)", err); return err; } fw_flavor = (fw_flavor & 0x00000080) >> 7; } btmtk_data->dev_id = dev_id; err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version); if (err < 0) bt_dev_err(hdev, "Failed to register coredump (%d)", err); switch (dev_id) { case 0x7663: fwname = FIRMWARE_MT7663; break; case 0x7668: fwname = FIRMWARE_MT7668; break; case 0x7922: case 0x7961: case 0x7925: /* Reset the device to ensure it's in the initial state before * downloading the firmware to ensure. */ if (!test_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags)) btmtk_usb_subsys_reset(hdev, dev_id); btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id, fw_version, fw_flavor); err = btmtk_setup_firmware_79xx(hdev, fw_bin_name, btmtk_usb_hci_wmt_sync); if (err < 0) { bt_dev_err(hdev, "Failed to set up firmware (%d)", err); clear_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags); return err; } set_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags); /* It's Device EndPoint Reset Option Register */ err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT); if (err < 0) return err; /* Enable Bluetooth protocol */ param = 1; wmt_params.op = BTMTK_WMT_FUNC_CTRL; wmt_params.flag = 0; wmt_params.dlen = sizeof(param); wmt_params.data = ¶m; wmt_params.status = NULL; err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); return err; } hci_set_msft_opcode(hdev, 0xFD30); hci_set_aosp_capable(hdev); /* Set up ISO interface after protocol enabled */ if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) { if (!btmtk_usb_isointf_init(hdev)) set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags); } goto done; default: bt_dev_err(hdev, "Unsupported hardware variant (%08x)", dev_id); return -ENODEV; } /* Query whether the firmware is already download */ wmt_params.op = BTMTK_WMT_SEMAPHORE; wmt_params.flag = 1; wmt_params.dlen = 0; wmt_params.data = NULL; wmt_params.status = &status; err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to query firmware status (%d)", err); return err; } if (status == BTMTK_WMT_PATCH_DONE) { bt_dev_info(hdev, "firmware already downloaded"); goto ignore_setup_fw; } /* Setup a firmware which the device definitely requires */ err = btmtk_setup_firmware(hdev, fwname, btmtk_usb_hci_wmt_sync); if (err < 0) return err; ignore_setup_fw: err = readx_poll_timeout(btmtk_usb_func_query, hdev, status, status < 0 || status != BTMTK_WMT_ON_PROGRESS, 2000, 5000000); /* -ETIMEDOUT happens */ if (err < 0) return err; /* The other errors happen in btmtk_usb_func_query */ if (status < 0) return status; if (status == BTMTK_WMT_ON_DONE) { bt_dev_info(hdev, "function already on"); goto ignore_func_on; } /* Enable Bluetooth protocol */ param = 1; wmt_params.op = BTMTK_WMT_FUNC_CTRL; wmt_params.flag = 0; wmt_params.dlen = sizeof(param); wmt_params.data = ¶m; wmt_params.status = NULL; err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); return err; } ignore_func_on: /* Apply the low power environment setup */ tci_sleep.mode = 0x5; tci_sleep.duration = cpu_to_le16(0x640); tci_sleep.host_duration = cpu_to_le16(0x640); tci_sleep.host_wakeup_pin = 0; tci_sleep.time_compensation = 0; skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep, HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { err = PTR_ERR(skb); bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); return err; } kfree_skb(skb); done: rettime = ktime_get(); delta = ktime_sub(rettime, calltime); duration = (unsigned long long)ktime_to_ns(delta) >> 10; bt_dev_info(hdev, "Device setup in %llu usecs", duration); return 0; } EXPORT_SYMBOL_GPL(btmtk_usb_setup); int btmtk_usb_shutdown(struct hci_dev *hdev) { struct btmtk_hci_wmt_params wmt_params; u8 param = 0; int err; /* Disable the device */ wmt_params.op = BTMTK_WMT_FUNC_CTRL; wmt_params.flag = 0; wmt_params.dlen = sizeof(param); wmt_params.data = ¶m; wmt_params.status = NULL; err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); if (err < 0) { bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); return err; } return 0; } EXPORT_SYMBOL_GPL(btmtk_usb_shutdown); #endif MODULE_AUTHOR("Sean Wang "); MODULE_AUTHOR("Mark Chen "); MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL"); MODULE_FIRMWARE(FIRMWARE_MT7622); MODULE_FIRMWARE(FIRMWARE_MT7663); MODULE_FIRMWARE(FIRMWARE_MT7668); MODULE_FIRMWARE(FIRMWARE_MT7922); MODULE_FIRMWARE(FIRMWARE_MT7961); MODULE_FIRMWARE(FIRMWARE_MT7925);