diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/bluetooth/btmtk.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c new file mode 100644 index 000000000..809762d64 --- /dev/null +++ b/drivers/bluetooth/btmtk.c @@ -0,0 +1,291 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2021 MediaTek Inc. + * + */ +#include <linux/module.h> +#include <linux/firmware.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> + +#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 + +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; + +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_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; + globaldesc = (struct btmtk_global_desc *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE); + section_num = le32_to_cpu(globaldesc->section_num); + + 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 funciton 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); + +MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); +MODULE_AUTHOR("Mark Chen <mark-yw.chen@mediatek.com>"); +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_MT7961); |