// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 *  Bluetooth support for Intel devices
 *
 *  Copyright (C) 2015  Intel Corporation
 */

#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/regmap.h>
#include <linux/string_choices.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <linux/unaligned.h>
#include <linux/efi.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "btintel.h"

#define VERSION "0.1"

#define BDADDR_INTEL            (&(bdaddr_t){{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
#define RSA_HEADER_LEN          644
#define CSS_HEADER_OFFSET       8
#define ECDSA_OFFSET            644
#define ECDSA_HEADER_LEN        320

#define BTINTEL_EFI_DSBR        L"UefiCnvCommonDSBR"

enum {
        DSM_SET_WDISABLE2_DELAY = 1,
        DSM_SET_RESET_METHOD = 3,
};

#define BTINTEL_BT_DOMAIN               0x12
#define BTINTEL_SAR_LEGACY              0
#define BTINTEL_SAR_INC_PWR             1
#define BTINTEL_SAR_INC_PWR_SUPPORTED   0

#define CMD_WRITE_BOOT_PARAMS   0xfc0e
struct cmd_write_boot_params {
        __le32 boot_addr;
        u8  fw_build_num;
        u8  fw_build_ww;
        u8  fw_build_yy;
} __packed;

static struct {
        const char *driver_name;
        u8         hw_variant;
        u32        fw_build_num;
} coredump_info;

static const guid_t btintel_guid_dsm =
        GUID_INIT(0xaa10f4e0, 0x81ac, 0x4233,
                  0xab, 0xf6, 0x3b, 0x2a, 0xc5, 0x0e, 0x28, 0xd9);

int btintel_check_bdaddr(struct hci_dev *hdev)
{
        struct hci_rp_read_bd_addr *bda;
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
                             HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                int err = PTR_ERR(skb);
                bt_dev_err(hdev, "Reading Intel device address failed (%d)",
                           err);
                return err;
        }

        if (skb->len != sizeof(*bda)) {
                bt_dev_err(hdev, "Intel device address length mismatch");
                kfree_skb(skb);
                return -EIO;
        }

        bda = (struct hci_rp_read_bd_addr *)skb->data;

        /* For some Intel based controllers, the default Bluetooth device
         * address 00:03:19:9E:8B:00 can be found. These controllers are
         * fully operational, but have the danger of duplicate addresses
         * and that in turn can cause problems with Bluetooth operation.
         */
        if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
                bt_dev_err(hdev, "Found Intel default device address (%pMR)",
                           &bda->bdaddr);
                hci_set_quirk(hdev, HCI_QUIRK_INVALID_BDADDR);
        }

        kfree_skb(skb);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_check_bdaddr);

int btintel_enter_mfg(struct hci_dev *hdev)
{
        static const u8 param[] = { 0x01, 0x00 };
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Entering manufacturer mode failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_enter_mfg);

int btintel_exit_mfg(struct hci_dev *hdev, bool reset, bool patched)
{
        u8 param[] = { 0x00, 0x00 };
        struct sk_buff *skb;

        /* The 2nd command parameter specifies the manufacturing exit method:
         * 0x00: Just disable the manufacturing mode (0x00).
         * 0x01: Disable manufacturing mode and reset with patches deactivated.
         * 0x02: Disable manufacturing mode and reset with patches activated.
         */
        if (reset)
                param[1] |= patched ? 0x02 : 0x01;

        skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Exiting manufacturer mode failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_exit_mfg);

int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
{
        struct sk_buff *skb;
        int err;

        skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                err = PTR_ERR(skb);
                bt_dev_err(hdev, "Changing Intel device address failed (%d)",
                           err);
                return err;
        }
        kfree_skb(skb);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_set_bdaddr);

static int btintel_set_event_mask(struct hci_dev *hdev, bool debug)
{
        u8 mask[8] = { 0x87, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        struct sk_buff *skb;
        int err;

        if (debug)
                mask[1] |= 0x62;

        skb = __hci_cmd_sync(hdev, 0xfc52, 8, mask, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                err = PTR_ERR(skb);
                bt_dev_err(hdev, "Setting Intel event mask failed (%d)", err);
                return err;
        }
        kfree_skb(skb);

        return 0;
}

int btintel_set_diag(struct hci_dev *hdev, bool enable)
{
        struct sk_buff *skb;
        u8 param[3];
        int err;

        if (enable) {
                param[0] = 0x03;
                param[1] = 0x03;
                param[2] = 0x03;
        } else {
                param[0] = 0x00;
                param[1] = 0x00;
                param[2] = 0x00;
        }

        skb = __hci_cmd_sync(hdev, 0xfc43, 3, param, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                err = PTR_ERR(skb);
                if (err == -ENODATA)
                        goto done;
                bt_dev_err(hdev, "Changing Intel diagnostic mode failed (%d)",
                           err);
                return err;
        }
        kfree_skb(skb);

done:
        btintel_set_event_mask(hdev, enable);
        return 0;
}
EXPORT_SYMBOL_GPL(btintel_set_diag);

static int btintel_set_diag_mfg(struct hci_dev *hdev, bool enable)
{
        int err, ret;

        err = btintel_enter_mfg(hdev);
        if (err)
                return err;

        ret = btintel_set_diag(hdev, enable);

        err = btintel_exit_mfg(hdev, false, false);
        if (err)
                return err;

        return ret;
}

static int btintel_set_diag_combined(struct hci_dev *hdev, bool enable)
{
        int ret;

        /* Legacy ROM device needs to be in the manufacturer mode to apply
         * diagnostic setting
         *
         * This flag is set after reading the Intel version.
         */
        if (btintel_test_flag(hdev, INTEL_ROM_LEGACY))
                ret = btintel_set_diag_mfg(hdev, enable);
        else
                ret = btintel_set_diag(hdev, enable);

        return ret;
}

void btintel_hw_error(struct hci_dev *hdev, u8 code)
{
        struct sk_buff *skb;
        u8 type = 0x00;

        bt_dev_err(hdev, "Hardware error 0x%2.2x", code);

        hci_req_sync_lock(hdev);

        skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reset after hardware error failed (%ld)",
                           PTR_ERR(skb));
                goto unlock;
        }
        kfree_skb(skb);

        skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Retrieving Intel exception info failed (%ld)",
                           PTR_ERR(skb));
                goto unlock;
        }

        if (skb->len != 13) {
                bt_dev_err(hdev, "Exception info size mismatch");
                kfree_skb(skb);
                goto unlock;
        }

        bt_dev_err(hdev, "Exception info %s", (char *)(skb->data + 1));

        kfree_skb(skb);

unlock:
        hci_req_sync_unlock(hdev);
}
EXPORT_SYMBOL_GPL(btintel_hw_error);

int btintel_version_info(struct hci_dev *hdev, struct intel_version *ver)
{
        const char *variant;

        /* The hardware platform number has a fixed value of 0x37 and
         * for now only accept this single value.
         */
        if (ver->hw_platform != 0x37) {
                bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
                           ver->hw_platform);
                return -EINVAL;
        }

        /* Check for supported iBT hardware variants of this firmware
         * loading method.
         *
         * This check has been put in place to ensure correct forward
         * compatibility options when newer hardware variants come along.
         */
        switch (ver->hw_variant) {
        case 0x07:      /* WP - Legacy ROM */
        case 0x08:      /* StP - Legacy ROM */
        case 0x0b:      /* SfP */
        case 0x0c:      /* WsP */
        case 0x11:      /* JfP */
        case 0x12:      /* ThP */
        case 0x13:      /* HrP */
        case 0x14:      /* CcP */
                break;
        default:
                bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
                           ver->hw_variant);
                return -EINVAL;
        }

        switch (ver->fw_variant) {
        case 0x01:
                variant = "Legacy ROM 2.5";
                break;
        case 0x06:
                variant = "Bootloader";
                break;
        case 0x22:
                variant = "Legacy ROM 2.x";
                break;
        case 0x23:
                variant = "Firmware";
                break;
        default:
                bt_dev_err(hdev, "Unsupported firmware variant(%02x)", ver->fw_variant);
                return -EINVAL;
        }

        coredump_info.hw_variant = ver->hw_variant;
        coredump_info.fw_build_num = ver->fw_build_num;

        bt_dev_info(hdev, "%s revision %u.%u build %u week %u %u",
                    variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f,
                    ver->fw_build_num, ver->fw_build_ww,
                    2000 + ver->fw_build_yy);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_version_info);

static int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
                               const void *param)
{
        while (plen > 0) {
                struct sk_buff *skb;
                u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;

                cmd_param[0] = fragment_type;
                memcpy(cmd_param + 1, param, fragment_len);

                skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
                                     cmd_param, HCI_INIT_TIMEOUT);
                if (IS_ERR(skb))
                        return PTR_ERR(skb);

                kfree_skb(skb);

                plen -= fragment_len;
                param += fragment_len;
        }

        return 0;
}

int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name)
{
        const struct firmware *fw;
        struct sk_buff *skb;
        const u8 *fw_ptr;
        int err;

        err = request_firmware_direct(&fw, ddc_name, &hdev->dev);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)",
                           ddc_name, err);
                return err;
        }

        bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name);

        fw_ptr = fw->data;

        /* DDC file contains one or more DDC structure which has
         * Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2).
         */
        while (fw->size > fw_ptr - fw->data) {
                u8 cmd_plen = fw_ptr[0] + sizeof(u8);

                skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr,
                                     HCI_INIT_TIMEOUT);
                if (IS_ERR(skb)) {
                        bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)",
                                   PTR_ERR(skb));
                        release_firmware(fw);
                        return PTR_ERR(skb);
                }

                fw_ptr += cmd_plen;
                kfree_skb(skb);
        }

        release_firmware(fw);

        bt_dev_info(hdev, "Applying Intel DDC parameters completed");

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_load_ddc_config);

int btintel_set_event_mask_mfg(struct hci_dev *hdev, bool debug)
{
        int err, ret;

        err = btintel_enter_mfg(hdev);
        if (err)
                return err;

        ret = btintel_set_event_mask(hdev, debug);

        err = btintel_exit_mfg(hdev, false, false);
        if (err)
                return err;

        return ret;
}
EXPORT_SYMBOL_GPL(btintel_set_event_mask_mfg);

int btintel_read_version(struct hci_dev *hdev, struct intel_version *ver)
{
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        if (!skb || skb->len != sizeof(*ver)) {
                bt_dev_err(hdev, "Intel version event size mismatch");
                kfree_skb(skb);
                return -EILSEQ;
        }

        memcpy(ver, skb->data, sizeof(*ver));

        kfree_skb(skb);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_read_version);

int btintel_version_info_tlv(struct hci_dev *hdev,
                             struct intel_version_tlv *version)
{
        const char *variant;

        /* The hardware platform number has a fixed value of 0x37 and
         * for now only accept this single value.
         */
        if (INTEL_HW_PLATFORM(version->cnvi_bt) != 0x37) {
                bt_dev_err(hdev, "Unsupported Intel hardware platform (0x%2x)",
                           INTEL_HW_PLATFORM(version->cnvi_bt));
                return -EINVAL;
        }

        /* Check for supported iBT hardware variants of this firmware
         * loading method.
         *
         * This check has been put in place to ensure correct forward
         * compatibility options when newer hardware variants come along.
         */
        switch (INTEL_HW_VARIANT(version->cnvi_bt)) {
        case 0x17:      /* TyP */
        case 0x18:      /* Slr */
        case 0x19:      /* Slr-F */
        case 0x1b:      /* Mgr */
        case 0x1c:      /* Gale Peak (GaP) */
        case 0x1d:      /* BlazarU (BzrU) */
        case 0x1e:      /* BlazarI (Bzr) */
        case 0x1f:      /* Scorpious Peak */
        case 0x22:      /* BlazarIW (BzrIW) */
                break;
        default:
                bt_dev_err(hdev, "Unsupported Intel hardware variant (0x%x)",
                           INTEL_HW_VARIANT(version->cnvi_bt));
                return -EINVAL;
        }

        switch (version->img_type) {
        case BTINTEL_IMG_BOOTLOADER:
                variant = "Bootloader";
                /* It is required that every single firmware fragment is acknowledged
                 * with a command complete event. If the boot parameters indicate
                 * that this bootloader does not send them, then abort the setup.
                 */
                if (version->limited_cce != 0x00) {
                        bt_dev_err(hdev, "Unsupported Intel firmware loading method (0x%x)",
                                   version->limited_cce);
                        return -EINVAL;
                }

                /* Secure boot engine type should be either 1 (ECDSA) or 0 (RSA) */
                if (version->sbe_type > 0x01) {
                        bt_dev_err(hdev, "Unsupported Intel secure boot engine type (0x%x)",
                                   version->sbe_type);
                        return -EINVAL;
                }

                bt_dev_info(hdev, "Device revision is %u", version->dev_rev_id);
                bt_dev_info(hdev, "Secure boot is %s",
                            str_enabled_disabled(version->secure_boot));
                bt_dev_info(hdev, "OTP lock is %s",
                            str_enabled_disabled(version->otp_lock));
                bt_dev_info(hdev, "API lock is %s",
                            str_enabled_disabled(version->api_lock));
                bt_dev_info(hdev, "Debug lock is %s",
                            str_enabled_disabled(version->debug_lock));
                bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
                            version->min_fw_build_nn, version->min_fw_build_cw,
                            2000 + version->min_fw_build_yy);
                break;
        case BTINTEL_IMG_IML:
                variant = "Intermediate loader";
                break;
        case BTINTEL_IMG_OP:
                variant = "Firmware";
                break;
        default:
                bt_dev_err(hdev, "Unsupported image type(%02x)", version->img_type);
                return -EINVAL;
        }

        coredump_info.hw_variant = INTEL_HW_VARIANT(version->cnvi_bt);
        coredump_info.fw_build_num = version->build_num;

        bt_dev_info(hdev, "%s timestamp %u.%u buildtype %u build %u", variant,
                    2000 + (version->timestamp >> 8), version->timestamp & 0xff,
                    version->build_type, version->build_num);
        if (version->img_type == BTINTEL_IMG_OP)
                bt_dev_info(hdev, "Firmware SHA1: 0x%8.8x", version->git_sha1);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_version_info_tlv);

int btintel_parse_version_tlv(struct hci_dev *hdev,
                              struct intel_version_tlv *version,
                              struct sk_buff *skb)
{
        /* Consume Command Complete Status field */
        skb_pull(skb, 1);

        /* Event parameters contain multiple TLVs. Read each of them
         * and only keep the required data. Also, it use existing legacy
         * version field like hw_platform, hw_variant, and fw_variant
         * to keep the existing setup flow
         */
        while (skb->len) {
                struct intel_tlv *tlv;

                /* Make sure skb has a minimum length of the header */
                if (skb->len < sizeof(*tlv))
                        return -EINVAL;

                tlv = (struct intel_tlv *)skb->data;

                /* Make sure skb has a enough data */
                if (skb->len < tlv->len + sizeof(*tlv))
                        return -EINVAL;

                switch (tlv->type) {
                case INTEL_TLV_CNVI_TOP:
                        version->cnvi_top = get_unaligned_le32(tlv->val);
                        break;
                case INTEL_TLV_CNVR_TOP:
                        version->cnvr_top = get_unaligned_le32(tlv->val);
                        break;
                case INTEL_TLV_CNVI_BT:
                        version->cnvi_bt = get_unaligned_le32(tlv->val);
                        break;
                case INTEL_TLV_CNVR_BT:
                        version->cnvr_bt = get_unaligned_le32(tlv->val);
                        break;
                case INTEL_TLV_DEV_REV_ID:
                        version->dev_rev_id = get_unaligned_le16(tlv->val);
                        break;
                case INTEL_TLV_IMAGE_TYPE:
                        version->img_type = tlv->val[0];
                        break;
                case INTEL_TLV_TIME_STAMP:
                        /* If image type is Operational firmware (0x03), then
                         * running FW Calendar Week and Year information can
                         * be extracted from Timestamp information
                         */
                        version->min_fw_build_cw = tlv->val[0];
                        version->min_fw_build_yy = tlv->val[1];
                        version->timestamp = get_unaligned_le16(tlv->val);
                        break;
                case INTEL_TLV_BUILD_TYPE:
                        version->build_type = tlv->val[0];
                        break;
                case INTEL_TLV_BUILD_NUM:
                        /* If image type is Operational firmware (0x03), then
                         * running FW build number can be extracted from the
                         * Build information
                         */
                        version->min_fw_build_nn = tlv->val[0];
                        version->build_num = get_unaligned_le32(tlv->val);
                        break;
                case INTEL_TLV_SECURE_BOOT:
                        version->secure_boot = tlv->val[0];
                        break;
                case INTEL_TLV_OTP_LOCK:
                        version->otp_lock = tlv->val[0];
                        break;
                case INTEL_TLV_API_LOCK:
                        version->api_lock = tlv->val[0];
                        break;
                case INTEL_TLV_DEBUG_LOCK:
                        version->debug_lock = tlv->val[0];
                        break;
                case INTEL_TLV_MIN_FW:
                        version->min_fw_build_nn = tlv->val[0];
                        version->min_fw_build_cw = tlv->val[1];
                        version->min_fw_build_yy = tlv->val[2];
                        break;
                case INTEL_TLV_LIMITED_CCE:
                        version->limited_cce = tlv->val[0];
                        break;
                case INTEL_TLV_SBE_TYPE:
                        version->sbe_type = tlv->val[0];
                        break;
                case INTEL_TLV_OTP_BDADDR:
                        memcpy(&version->otp_bd_addr, tlv->val,
                                                        sizeof(bdaddr_t));
                        break;
                case INTEL_TLV_GIT_SHA1:
                        version->git_sha1 = get_unaligned_le32(tlv->val);
                        break;
                case INTEL_TLV_FW_ID:
                        snprintf(version->fw_id, sizeof(version->fw_id),
                                 "%s", tlv->val);
                        break;
                default:
                        /* Ignore rest of information */
                        break;
                }
                /* consume the current tlv and move to next*/
                skb_pull(skb, tlv->len + sizeof(*tlv));
        }

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_parse_version_tlv);

static int btintel_read_version_tlv(struct hci_dev *hdev,
                                    struct intel_version_tlv *version)
{
        struct sk_buff *skb;
        const u8 param[1] = { 0xFF };

        if (!version)
                return -EINVAL;

        skb = __hci_cmd_sync(hdev, 0xfc05, 1, param, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        if (skb->data[0]) {
                bt_dev_err(hdev, "Intel Read Version command failed (%02x)",
                           skb->data[0]);
                kfree_skb(skb);
                return -EIO;
        }

        btintel_parse_version_tlv(hdev, version, skb);

        kfree_skb(skb);
        return 0;
}

/* ------- REGMAP IBT SUPPORT ------- */

#define IBT_REG_MODE_8BIT  0x00
#define IBT_REG_MODE_16BIT 0x01
#define IBT_REG_MODE_32BIT 0x02

struct regmap_ibt_context {
        struct hci_dev *hdev;
        __u16 op_write;
        __u16 op_read;
};

struct ibt_cp_reg_access {
        __le32  addr;
        __u8    mode;
        __u8    len;
        __u8    data[];
} __packed;

struct ibt_rp_reg_access {
        __u8    status;
        __le32  addr;
        __u8    data[];
} __packed;

static int regmap_ibt_read(void *context, const void *addr, size_t reg_size,
                           void *val, size_t val_size)
{
        struct regmap_ibt_context *ctx = context;
        struct ibt_cp_reg_access cp;
        struct ibt_rp_reg_access *rp;
        struct sk_buff *skb;
        int err = 0;

        if (reg_size != sizeof(__le32))
                return -EINVAL;

        switch (val_size) {
        case 1:
                cp.mode = IBT_REG_MODE_8BIT;
                break;
        case 2:
                cp.mode = IBT_REG_MODE_16BIT;
                break;
        case 4:
                cp.mode = IBT_REG_MODE_32BIT;
                break;
        default:
                return -EINVAL;
        }

        /* regmap provides a little-endian formatted addr */
        cp.addr = *(__le32 *)addr;
        cp.len = val_size;

        bt_dev_dbg(ctx->hdev, "Register (0x%x) read", le32_to_cpu(cp.addr));

        skb = hci_cmd_sync(ctx->hdev, ctx->op_read, sizeof(cp), &cp,
                           HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                err = PTR_ERR(skb);
                bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error (%d)",
                           le32_to_cpu(cp.addr), err);
                return err;
        }

        if (skb->len != sizeof(*rp) + val_size) {
                bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad len",
                           le32_to_cpu(cp.addr));
                err = -EINVAL;
                goto done;
        }

        rp = (struct ibt_rp_reg_access *)skb->data;

        if (rp->addr != cp.addr) {
                bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad addr",
                           le32_to_cpu(rp->addr));
                err = -EINVAL;
                goto done;
        }

        memcpy(val, rp->data, val_size);

done:
        kfree_skb(skb);
        return err;
}

static int regmap_ibt_gather_write(void *context,
                                   const void *addr, size_t reg_size,
                                   const void *val, size_t val_size)
{
        struct regmap_ibt_context *ctx = context;
        struct ibt_cp_reg_access *cp;
        struct sk_buff *skb;
        int plen = sizeof(*cp) + val_size;
        u8 mode;
        int err = 0;

        if (reg_size != sizeof(__le32))
                return -EINVAL;

        switch (val_size) {
        case 1:
                mode = IBT_REG_MODE_8BIT;
                break;
        case 2:
                mode = IBT_REG_MODE_16BIT;
                break;
        case 4:
                mode = IBT_REG_MODE_32BIT;
                break;
        default:
                return -EINVAL;
        }

        cp = kmalloc(plen, GFP_KERNEL);
        if (!cp)
                return -ENOMEM;

        /* regmap provides a little-endian formatted addr/value */
        cp->addr = *(__le32 *)addr;
        cp->mode = mode;
        cp->len = val_size;
        memcpy(&cp->data, val, val_size);

        bt_dev_dbg(ctx->hdev, "Register (0x%x) write", le32_to_cpu(cp->addr));

        skb = hci_cmd_sync(ctx->hdev, ctx->op_write, plen, cp, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                err = PTR_ERR(skb);
                bt_dev_err(ctx->hdev, "regmap: Register (0x%x) write error (%d)",
                           le32_to_cpu(cp->addr), err);
                goto done;
        }
        kfree_skb(skb);

done:
        kfree(cp);
        return err;
}

static int regmap_ibt_write(void *context, const void *data, size_t count)
{
        /* data contains register+value, since we only support 32bit addr,
         * minimum data size is 4 bytes.
         */
        if (WARN_ONCE(count < 4, "Invalid register access"))
                return -EINVAL;

        return regmap_ibt_gather_write(context, data, 4, data + 4, count - 4);
}

static void regmap_ibt_free_context(void *context)
{
        kfree(context);
}

static const struct regmap_bus regmap_ibt = {
        .read = regmap_ibt_read,
        .write = regmap_ibt_write,
        .gather_write = regmap_ibt_gather_write,
        .free_context = regmap_ibt_free_context,
        .reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
        .val_format_endian_default = REGMAP_ENDIAN_LITTLE,
};

/* Config is the same for all register regions */
static const struct regmap_config regmap_ibt_cfg = {
        .name      = "btintel_regmap",
        .reg_bits  = 32,
        .val_bits  = 32,
};

struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read,
                                   u16 opcode_write)
{
        struct regmap_ibt_context *ctx;

        bt_dev_info(hdev, "regmap: Init R%x-W%x region", opcode_read,
                    opcode_write);

        ctx = kzalloc_obj(*ctx);
        if (!ctx)
                return ERR_PTR(-ENOMEM);

        ctx->op_read = opcode_read;
        ctx->op_write = opcode_write;
        ctx->hdev = hdev;

        return regmap_init(&hdev->dev, &regmap_ibt, ctx, &regmap_ibt_cfg);
}
EXPORT_SYMBOL_GPL(btintel_regmap_init);

int btintel_send_intel_reset(struct hci_dev *hdev, u32 boot_param)
{
        struct intel_reset params = { 0x00, 0x01, 0x00, 0x01, 0x00000000 };
        struct sk_buff *skb;

        params.boot_param = cpu_to_le32(boot_param);

        skb = __hci_cmd_sync(hdev, BTINTEL_HCI_OP_RESET, sizeof(params), &params,
                             HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Failed to send Intel Reset command");
                return PTR_ERR(skb);
        }

        kfree_skb(skb);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_send_intel_reset);

int btintel_read_boot_params(struct hci_dev *hdev,
                             struct intel_boot_params *params)
{
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        if (skb->len != sizeof(*params)) {
                bt_dev_err(hdev, "Intel boot parameters size mismatch");
                kfree_skb(skb);
                return -EILSEQ;
        }

        memcpy(params, skb->data, sizeof(*params));

        kfree_skb(skb);

        if (params->status) {
                bt_dev_err(hdev, "Intel boot parameters command failed (%02x)",
                           params->status);
                return -bt_to_errno(params->status);
        }

        bt_dev_info(hdev, "Device revision is %u",
                    le16_to_cpu(params->dev_revid));

        bt_dev_info(hdev, "Secure boot is %s",
                    str_enabled_disabled(params->secure_boot));

        bt_dev_info(hdev, "OTP lock is %s",
                    str_enabled_disabled(params->otp_lock));

        bt_dev_info(hdev, "API lock is %s",
                    str_enabled_disabled(params->api_lock));

        bt_dev_info(hdev, "Debug lock is %s",
                    str_enabled_disabled(params->debug_lock));

        bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
                    params->min_fw_build_nn, params->min_fw_build_cw,
                    2000 + params->min_fw_build_yy);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_read_boot_params);

static int btintel_sfi_rsa_header_secure_send(struct hci_dev *hdev,
                                              const struct firmware *fw)
{
        int err;

        /* Start the firmware download transaction with the Init fragment
         * represented by the 128 bytes of CSS header.
         */
        err = btintel_secure_send(hdev, 0x00, 128, fw->data);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
                goto done;
        }

        /* Send the 256 bytes of public key information from the firmware
         * as the PKey fragment.
         */
        err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send firmware pkey (%d)", err);
                goto done;
        }

        /* Send the 256 bytes of signature information from the firmware
         * as the Sign fragment.
         */
        err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send firmware signature (%d)", err);
                goto done;
        }

done:
        return err;
}

static int btintel_sfi_ecdsa_header_secure_send(struct hci_dev *hdev,
                                                const struct firmware *fw)
{
        int err;

        /* Start the firmware download transaction with the Init fragment
         * represented by the 128 bytes of CSS header.
         */
        err = btintel_secure_send(hdev, 0x00, 128, fw->data + 644);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
                return err;
        }

        /* Send the 96 bytes of public key information from the firmware
         * as the PKey fragment.
         */
        err = btintel_secure_send(hdev, 0x03, 96, fw->data + 644 + 128);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send firmware pkey (%d)", err);
                return err;
        }

        /* Send the 96 bytes of signature information from the firmware
         * as the Sign fragment
         */
        err = btintel_secure_send(hdev, 0x02, 96, fw->data + 644 + 224);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send firmware signature (%d)",
                           err);
                return err;
        }
        return 0;
}

static int btintel_download_firmware_payload(struct hci_dev *hdev,
                                             const struct firmware *fw,
                                             size_t offset)
{
        int err;
        const u8 *fw_ptr;
        u32 frag_len;

        fw_ptr = fw->data + offset;
        frag_len = 0;
        err = -EINVAL;

        while (fw_ptr - fw->data < fw->size) {
                struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);

                frag_len += sizeof(*cmd) + cmd->plen;

                /* The parameter length of the secure send command requires
                 * a 4 byte alignment. It happens so that the firmware file
                 * contains proper Intel_NOP commands to align the fragments
                 * as needed.
                 *
                 * Send set of commands with 4 byte alignment from the
                 * firmware data buffer as a single Data fragment.
                 */
                if (!(frag_len % 4)) {
                        err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
                        if (err < 0) {
                                bt_dev_err(hdev,
                                           "Failed to send firmware data (%d)",
                                           err);
                                goto done;
                        }

                        fw_ptr += frag_len;
                        frag_len = 0;
                }
        }

done:
        return err;
}

static bool btintel_firmware_version(struct hci_dev *hdev,
                                     u8 num, u8 ww, u8 yy,
                                     const struct firmware *fw,
                                     u32 *boot_addr)
{
        const u8 *fw_ptr;

        fw_ptr = fw->data;

        while (fw_ptr - fw->data < fw->size) {
                struct hci_command_hdr *cmd = (void *)(fw_ptr);

                /* Each SKU has a different reset parameter to use in the
                 * HCI_Intel_Reset command and it is embedded in the firmware
                 * data. So, instead of using static value per SKU, check
                 * the firmware data and save it for later use.
                 */
                if (le16_to_cpu(cmd->opcode) == CMD_WRITE_BOOT_PARAMS) {
                        struct cmd_write_boot_params *params;

                        params = (void *)(fw_ptr + sizeof(*cmd));

                        *boot_addr = le32_to_cpu(params->boot_addr);

                        bt_dev_info(hdev, "Boot Address: 0x%x", *boot_addr);

                        bt_dev_info(hdev, "Firmware Version: %u-%u.%u",
                                    params->fw_build_num, params->fw_build_ww,
                                    params->fw_build_yy);

                        return (num == params->fw_build_num &&
                                ww == params->fw_build_ww &&
                                yy == params->fw_build_yy);
                }

                fw_ptr += sizeof(*cmd) + cmd->plen;
        }

        return false;
}

int btintel_download_firmware(struct hci_dev *hdev,
                              struct intel_version *ver,
                              const struct firmware *fw,
                              u32 *boot_param)
{
        int err;

        /* SfP and WsP don't seem to update the firmware version on file
         * so version checking is currently not possible.
         */
        switch (ver->hw_variant) {
        case 0x0b:      /* SfP */
        case 0x0c:      /* WsP */
                /* Skip version checking */
                break;
        default:

                /* Skip download if firmware has the same version */
                if (btintel_firmware_version(hdev, ver->fw_build_num,
                                             ver->fw_build_ww, ver->fw_build_yy,
                                             fw, boot_param)) {
                        bt_dev_info(hdev, "Firmware already loaded");
                        /* Return -EALREADY to indicate that the firmware has
                         * already been loaded.
                         */
                        return -EALREADY;
                }
        }

        /* The firmware variant determines if the device is in bootloader
         * mode or is running operational firmware. The value 0x06 identifies
         * the bootloader and the value 0x23 identifies the operational
         * firmware.
         *
         * If the firmware version has changed that means it needs to be reset
         * to bootloader when operational so the new firmware can be loaded.
         */
        if (ver->fw_variant == 0x23)
                return -EINVAL;

        err = btintel_sfi_rsa_header_secure_send(hdev, fw);
        if (err)
                return err;

        return btintel_download_firmware_payload(hdev, fw, RSA_HEADER_LEN);
}
EXPORT_SYMBOL_GPL(btintel_download_firmware);

static int btintel_download_fw_tlv(struct hci_dev *hdev,
                                   struct intel_version_tlv *ver,
                                   const struct firmware *fw, u32 *boot_param,
                                   u8 hw_variant, u8 sbe_type)
{
        int err;
        u32 css_header_ver;

        /* Skip download if firmware has the same version */
        if (btintel_firmware_version(hdev, ver->min_fw_build_nn,
                                     ver->min_fw_build_cw,
                                     ver->min_fw_build_yy,
                                     fw, boot_param)) {
                bt_dev_info(hdev, "Firmware already loaded");
                /* Return -EALREADY to indicate that firmware has
                 * already been loaded.
                 */
                return -EALREADY;
        }

        /* The firmware variant determines if the device is in bootloader
         * mode or is running operational firmware. The value 0x01 identifies
         * the bootloader and the value 0x03 identifies the operational
         * firmware.
         *
         * If the firmware version has changed that means it needs to be reset
         * to bootloader when operational so the new firmware can be loaded.
         */
        if (ver->img_type == BTINTEL_IMG_OP)
                return -EINVAL;

        /* iBT hardware variants 0x0b, 0x0c, 0x11, 0x12, 0x13, 0x14 support
         * only RSA secure boot engine. Hence, the corresponding sfi file will
         * have RSA header of 644 bytes followed by Command Buffer.
         *
         * iBT hardware variants 0x17, 0x18 onwards support both RSA and ECDSA
         * secure boot engine. As a result, the corresponding sfi file will
         * have RSA header of 644, ECDSA header of 320 bytes followed by
         * Command Buffer.
         *
         * CSS Header byte positions 0x08 to 0x0B represent the CSS Header
         * version: RSA(0x00010000) , ECDSA (0x00020000)
         */
        css_header_ver = get_unaligned_le32(fw->data + CSS_HEADER_OFFSET);
        if (css_header_ver != 0x00010000) {
                bt_dev_err(hdev, "Invalid CSS Header version");
                return -EINVAL;
        }

        if (hw_variant <= 0x14) {
                if (sbe_type != 0x00) {
                        bt_dev_err(hdev, "Invalid SBE type for hardware variant (%d)",
                                   hw_variant);
                        return -EINVAL;
                }

                err = btintel_sfi_rsa_header_secure_send(hdev, fw);
                if (err)
                        return err;

                err = btintel_download_firmware_payload(hdev, fw, RSA_HEADER_LEN);
                if (err)
                        return err;
        } else if (hw_variant >= 0x17) {
                /* Check if CSS header for ECDSA follows the RSA header */
                if (fw->data[ECDSA_OFFSET] != 0x06)
                        return -EINVAL;

                /* Check if the CSS Header version is ECDSA(0x00020000) */
                css_header_ver = get_unaligned_le32(fw->data + ECDSA_OFFSET + CSS_HEADER_OFFSET);
                if (css_header_ver != 0x00020000) {
                        bt_dev_err(hdev, "Invalid CSS Header version");
                        return -EINVAL;
                }

                if (sbe_type == 0x00) {
                        err = btintel_sfi_rsa_header_secure_send(hdev, fw);
                        if (err)
                                return err;

                        err = btintel_download_firmware_payload(hdev, fw,
                                                                RSA_HEADER_LEN + ECDSA_HEADER_LEN);
                        if (err)
                                return err;
                } else if (sbe_type == 0x01) {
                        err = btintel_sfi_ecdsa_header_secure_send(hdev, fw);
                        if (err)
                                return err;

                        err = btintel_download_firmware_payload(hdev, fw,
                                                                RSA_HEADER_LEN + ECDSA_HEADER_LEN);
                        if (err)
                                return err;
                }
        }
        return 0;
}

static void btintel_reset_to_bootloader(struct hci_dev *hdev)
{
        struct intel_reset params;
        struct sk_buff *skb;

        /* PCIe transport uses shared hardware reset mechanism for recovery
         * which gets triggered in pcie *setup* function on error.
         */
        if (hdev->bus == HCI_PCI)
                return;

        /* Send Intel Reset command. This will result in
         * re-enumeration of BT controller.
         *
         * Intel Reset parameter description:
         * reset_type :   0x00 (Soft reset),
         *                0x01 (Hard reset)
         * patch_enable : 0x00 (Do not enable),
         *                0x01 (Enable)
         * ddc_reload :   0x00 (Do not reload),
         *                0x01 (Reload)
         * boot_option:   0x00 (Current image),
         *                0x01 (Specified boot address)
         * boot_param:    Boot address
         *
         */

        params.reset_type = 0x01;
        params.patch_enable = 0x01;
        params.ddc_reload = 0x01;
        params.boot_option = 0x00;
        params.boot_param = cpu_to_le32(0x00000000);

        skb = __hci_cmd_sync(hdev, BTINTEL_HCI_OP_RESET, sizeof(params),
                             &params, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "FW download error recovery failed (%ld)",
                           PTR_ERR(skb));
                return;
        }
        bt_dev_info(hdev, "Intel reset sent to retry FW download");
        kfree_skb(skb);

        /* Current Intel BT controllers(ThP/JfP) hold the USB reset
         * lines for 2ms when it receives Intel Reset in bootloader mode.
         * Whereas, the upcoming Intel BT controllers will hold USB reset
         * for 150ms. To keep the delay generic, 150ms is chosen here.
         */
        msleep(150);
}

static int btintel_read_debug_features(struct hci_dev *hdev,
                                       struct intel_debug_features *features)
{
        struct sk_buff *skb;
        u8 page_no = 1;

        /* Intel controller supports two pages, each page is of 128-bit
         * feature bit mask. And each bit defines specific feature support
         */
        skb = __hci_cmd_sync(hdev, 0xfca6, sizeof(page_no), &page_no,
                             HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reading supported features failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        if (skb->len != (sizeof(features->page1) + 3)) {
                bt_dev_err(hdev, "Supported features event size mismatch");
                kfree_skb(skb);
                return -EILSEQ;
        }

        memcpy(features->page1, skb->data + 3, sizeof(features->page1));

        /* Read the supported features page2 if required in future.
         */
        kfree_skb(skb);
        return 0;
}

static int btintel_set_debug_features(struct hci_dev *hdev,
                               const struct intel_debug_features *features)
{
        u8 mask[11] = { 0x0a, 0x92, 0x02, 0x7f, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00 };
        u8 period[5] = { 0x04, 0x91, 0x02, 0x05, 0x00 };
        u8 trace_enable = 0x02;
        struct sk_buff *skb;

        if (!features) {
                bt_dev_warn(hdev, "Debug features not read");
                return -EINVAL;
        }

        if (!(features->page1[0] & 0x3f)) {
                bt_dev_info(hdev, "Telemetry exception format not supported");
                return 0;
        }

        skb = __hci_cmd_sync(hdev, 0xfc8b, 11, mask, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Setting Intel telemetry ddc write event mask failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        skb = __hci_cmd_sync(hdev, 0xfc8b, 5, period, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Setting periodicity for link statistics traces failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        skb = __hci_cmd_sync(hdev, 0xfca1, 1, &trace_enable, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Enable tracing of link statistics events failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        bt_dev_info(hdev, "set debug features: trace_enable 0x%02x mask 0x%02x",
                    trace_enable, mask[3]);

        return 0;
}

static int btintel_reset_debug_features(struct hci_dev *hdev,
                                 const struct intel_debug_features *features)
{
        u8 mask[11] = { 0x0a, 0x92, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00 };
        u8 trace_enable = 0x00;
        struct sk_buff *skb;

        if (!features) {
                bt_dev_warn(hdev, "Debug features not read");
                return -EINVAL;
        }

        if (!(features->page1[0] & 0x3f)) {
                bt_dev_info(hdev, "Telemetry exception format not supported");
                return 0;
        }

        /* Should stop the trace before writing ddc event mask. */
        skb = __hci_cmd_sync(hdev, 0xfca1, 1, &trace_enable, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Stop tracing of link statistics events failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        skb = __hci_cmd_sync(hdev, 0xfc8b, 11, mask, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Setting Intel telemetry ddc write event mask failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        bt_dev_info(hdev, "reset debug features: trace_enable 0x%02x mask 0x%02x",
                    trace_enable, mask[3]);

        return 0;
}

int btintel_set_quality_report(struct hci_dev *hdev, bool enable)
{
        struct intel_debug_features features;
        int err;

        bt_dev_dbg(hdev, "enable %d", enable);

        /* Read the Intel supported features and if new exception formats
         * supported, need to load the additional DDC config to enable.
         */
        err = btintel_read_debug_features(hdev, &features);
        if (err)
                return err;

        /* Set or reset the debug features. */
        if (enable)
                err = btintel_set_debug_features(hdev, &features);
        else
                err = btintel_reset_debug_features(hdev, &features);

        return err;
}
EXPORT_SYMBOL_GPL(btintel_set_quality_report);

static void btintel_coredump(struct hci_dev *hdev)
{
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, 0xfc4e, 0, NULL, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Coredump failed (%ld)", PTR_ERR(skb));
                return;
        }

        kfree_skb(skb);
}

static void btintel_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
{
        char buf[80];

        snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n",
                 coredump_info.hw_variant);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
                 coredump_info.fw_build_num);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "Driver: %s\n", coredump_info.driver_name);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "Vendor: Intel\n");
        skb_put_data(skb, buf, strlen(buf));
}

static int btintel_register_devcoredump_support(struct hci_dev *hdev)
{
        struct intel_debug_features features;
        int err;

        err = btintel_read_debug_features(hdev, &features);
        if (err) {
                bt_dev_info(hdev, "Error reading debug features");
                return err;
        }

        if (!(features.page1[0] & 0x3f)) {
                bt_dev_dbg(hdev, "Telemetry exception format not supported");
                return -EOPNOTSUPP;
        }

        hci_devcd_register(hdev, btintel_coredump, btintel_dmp_hdr, NULL);

        return err;
}

static const struct firmware *btintel_legacy_rom_get_fw(struct hci_dev *hdev,
                                               struct intel_version *ver)
{
        const struct firmware *fw;
        char fwname[64];
        int ret;

        snprintf(fwname, sizeof(fwname),
                 "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
                 ver->hw_platform, ver->hw_variant, ver->hw_revision,
                 ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
                 ver->fw_build_ww, ver->fw_build_yy);

        ret = request_firmware(&fw, fwname, &hdev->dev);
        if (ret < 0) {
                if (ret == -EINVAL) {
                        bt_dev_err(hdev, "Intel firmware file request failed (%d)",
                                   ret);
                        return NULL;
                }

                bt_dev_err(hdev, "failed to open Intel firmware file: %s (%d)",
                           fwname, ret);

                /* If the correct firmware patch file is not found, use the
                 * default firmware patch file instead
                 */
                snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
                         ver->hw_platform, ver->hw_variant);
                if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
                        bt_dev_err(hdev, "failed to open default fw file: %s",
                                   fwname);
                        return NULL;
                }
        }

        bt_dev_info(hdev, "Intel Bluetooth firmware file: %s", fwname);

        return fw;
}

static int btintel_legacy_rom_patching(struct hci_dev *hdev,
                                      const struct firmware *fw,
                                      const u8 **fw_ptr, int *disable_patch)
{
        struct sk_buff *skb;
        struct hci_command_hdr *cmd;
        const u8 *cmd_param;
        struct hci_event_hdr *evt = NULL;
        const u8 *evt_param = NULL;
        int remain = fw->size - (*fw_ptr - fw->data);

        /* The first byte indicates the types of the patch command or event.
         * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
         * in the current firmware buffer doesn't start with 0x01 or
         * the size of remain buffer is smaller than HCI command header,
         * the firmware file is corrupted and it should stop the patching
         * process.
         */
        if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
                bt_dev_err(hdev, "Intel fw corrupted: invalid cmd read");
                return -EINVAL;
        }
        (*fw_ptr)++;
        remain--;

        cmd = (struct hci_command_hdr *)(*fw_ptr);
        *fw_ptr += sizeof(*cmd);
        remain -= sizeof(*cmd);

        /* Ensure that the remain firmware data is long enough than the length
         * of command parameter. If not, the firmware file is corrupted.
         */
        if (remain < cmd->plen) {
                bt_dev_err(hdev, "Intel fw corrupted: invalid cmd len");
                return -EFAULT;
        }

        /* If there is a command that loads a patch in the firmware
         * file, then enable the patch upon success, otherwise just
         * disable the manufacturer mode, for example patch activation
         * is not required when the default firmware patch file is used
         * because there are no patch data to load.
         */
        if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
                *disable_patch = 0;

        cmd_param = *fw_ptr;
        *fw_ptr += cmd->plen;
        remain -= cmd->plen;

        /* This reads the expected events when the above command is sent to the
         * device. Some vendor commands expects more than one events, for
         * example command status event followed by vendor specific event.
         * For this case, it only keeps the last expected event. so the command
         * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
         * last expected event.
         */
        while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
                (*fw_ptr)++;
                remain--;

                evt = (struct hci_event_hdr *)(*fw_ptr);
                *fw_ptr += sizeof(*evt);
                remain -= sizeof(*evt);

                if (remain < evt->plen) {
                        bt_dev_err(hdev, "Intel fw corrupted: invalid evt len");
                        return -EFAULT;
                }

                evt_param = *fw_ptr;
                *fw_ptr += evt->plen;
                remain -= evt->plen;
        }

        /* Every HCI commands in the firmware file has its correspond event.
         * If event is not found or remain is smaller than zero, the firmware
         * file is corrupted.
         */
        if (!evt || !evt_param || remain < 0) {
                bt_dev_err(hdev, "Intel fw corrupted: invalid evt read");
                return -EFAULT;
        }

        skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
                                cmd_param, evt->evt, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "sending Intel patch command (0x%4.4x) failed (%ld)",
                           cmd->opcode, PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        /* It ensures that the returned event matches the event data read from
         * the firmware file. At fist, it checks the length and then
         * the contents of the event.
         */
        if (skb->len != evt->plen) {
                bt_dev_err(hdev, "mismatch event length (opcode 0x%4.4x)",
                           le16_to_cpu(cmd->opcode));
                kfree_skb(skb);
                return -EFAULT;
        }

        if (memcmp(skb->data, evt_param, evt->plen)) {
                bt_dev_err(hdev, "mismatch event parameter (opcode 0x%4.4x)",
                           le16_to_cpu(cmd->opcode));
                kfree_skb(skb);
                return -EFAULT;
        }
        kfree_skb(skb);

        return 0;
}

static int btintel_legacy_rom_setup(struct hci_dev *hdev,
                                    struct intel_version *ver)
{
        const struct firmware *fw;
        const u8 *fw_ptr;
        int disable_patch, err;
        struct intel_version new_ver;

        BT_DBG("%s", hdev->name);

        /* fw_patch_num indicates the version of patch the device currently
         * have. If there is no patch data in the device, it is always 0x00.
         * So, if it is other than 0x00, no need to patch the device again.
         */
        if (ver->fw_patch_num) {
                bt_dev_info(hdev,
                            "Intel device is already patched. patch num: %02x",
                            ver->fw_patch_num);
                goto complete;
        }

        /* Opens the firmware patch file based on the firmware version read
         * from the controller. If it fails to open the matching firmware
         * patch file, it tries to open the default firmware patch file.
         * If no patch file is found, allow the device to operate without
         * a patch.
         */
        fw = btintel_legacy_rom_get_fw(hdev, ver);
        if (!fw)
                goto complete;
        fw_ptr = fw->data;

        /* Enable the manufacturer mode of the controller.
         * Only while this mode is enabled, the driver can download the
         * firmware patch data and configuration parameters.
         */
        err = btintel_enter_mfg(hdev);
        if (err) {
                release_firmware(fw);
                return err;
        }

        disable_patch = 1;

        /* The firmware data file consists of list of Intel specific HCI
         * commands and its expected events. The first byte indicates the
         * type of the message, either HCI command or HCI event.
         *
         * It reads the command and its expected event from the firmware file,
         * and send to the controller. Once __hci_cmd_sync_ev() returns,
         * the returned event is compared with the event read from the firmware
         * file and it will continue until all the messages are downloaded to
         * the controller.
         *
         * Once the firmware patching is completed successfully,
         * the manufacturer mode is disabled with reset and activating the
         * downloaded patch.
         *
         * If the firmware patching fails, the manufacturer mode is
         * disabled with reset and deactivating the patch.
         *
         * If the default patch file is used, no reset is done when disabling
         * the manufacturer.
         */
        while (fw->size > fw_ptr - fw->data) {
                int ret;

                ret = btintel_legacy_rom_patching(hdev, fw, &fw_ptr,
                                                 &disable_patch);
                if (ret < 0)
                        goto exit_mfg_deactivate;
        }

        release_firmware(fw);

        if (disable_patch)
                goto exit_mfg_disable;

        /* Patching completed successfully and disable the manufacturer mode
         * with reset and activate the downloaded firmware patches.
         */
        err = btintel_exit_mfg(hdev, true, true);
        if (err)
                return err;

        /* Need build number for downloaded fw patches in
         * every power-on boot
         */
        err = btintel_read_version(hdev, &new_ver);
        if (err)
                return err;

        bt_dev_info(hdev, "Intel BT fw patch 0x%02x completed & activated",
                    new_ver.fw_patch_num);

        goto complete;

exit_mfg_disable:
        /* Disable the manufacturer mode without reset */
        err = btintel_exit_mfg(hdev, false, false);
        if (err)
                return err;

        bt_dev_info(hdev, "Intel firmware patch completed");

        goto complete;

exit_mfg_deactivate:
        release_firmware(fw);

        /* Patching failed. Disable the manufacturer mode with reset and
         * deactivate the downloaded firmware patches.
         */
        err = btintel_exit_mfg(hdev, true, false);
        if (err)
                return err;

        bt_dev_info(hdev, "Intel firmware patch completed and deactivated");

complete:
        /* Set the event mask for Intel specific vendor events. This enables
         * a few extra events that are useful during general operation.
         */
        btintel_set_event_mask_mfg(hdev, false);

        btintel_check_bdaddr(hdev);

        return 0;
}

static int btintel_download_wait(struct hci_dev *hdev, ktime_t calltime, int msec)
{
        ktime_t delta, rettime;
        unsigned long long duration;
        int err;

        btintel_set_flag(hdev, INTEL_FIRMWARE_LOADED);

        bt_dev_info(hdev, "Waiting for firmware download to complete");

        err = btintel_wait_on_flag_timeout(hdev, INTEL_DOWNLOADING,
                                           TASK_INTERRUPTIBLE,
                                           msecs_to_jiffies(msec));
        if (err == -EINTR) {
                bt_dev_err(hdev, "Firmware loading interrupted");
                return err;
        }

        if (err) {
                bt_dev_err(hdev, "Firmware loading timeout");
                return -ETIMEDOUT;
        }

        if (btintel_test_flag(hdev, INTEL_FIRMWARE_FAILED)) {
                bt_dev_err(hdev, "Firmware loading failed");
                return -ENOEXEC;
        }

        rettime = ktime_get();
        delta = ktime_sub(rettime, calltime);
        duration = (unsigned long long)ktime_to_ns(delta) >> 10;

        bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);

        return 0;
}

static int btintel_boot_wait(struct hci_dev *hdev, ktime_t calltime, int msec)
{
        ktime_t delta, rettime;
        unsigned long long duration;
        int err;

        bt_dev_info(hdev, "Waiting for device to boot");

        err = btintel_wait_on_flag_timeout(hdev, INTEL_BOOTING,
                                           TASK_INTERRUPTIBLE,
                                           msecs_to_jiffies(msec));
        if (err == -EINTR) {
                bt_dev_err(hdev, "Device boot interrupted");
                return -EINTR;
        }

        if (err) {
                bt_dev_err(hdev, "Device boot timeout");
                return -ETIMEDOUT;
        }

        rettime = ktime_get();
        delta = ktime_sub(rettime, calltime);
        duration = (unsigned long long) ktime_to_ns(delta) >> 10;

        bt_dev_info(hdev, "Device booted in %llu usecs", duration);

        return 0;
}

static int btintel_boot_wait_d0(struct hci_dev *hdev, ktime_t calltime,
                                int msec)
{
        ktime_t delta, rettime;
        unsigned long long duration;
        int err;

        bt_dev_info(hdev, "Waiting for device transition to d0");

        err = btintel_wait_on_flag_timeout(hdev, INTEL_WAIT_FOR_D0,
                                           TASK_INTERRUPTIBLE,
                                           msecs_to_jiffies(msec));
        if (err == -EINTR) {
                bt_dev_err(hdev, "Device d0 move interrupted");
                return -EINTR;
        }

        if (err) {
                bt_dev_err(hdev, "Device d0 move timeout");
                return -ETIMEDOUT;
        }

        rettime = ktime_get();
        delta = ktime_sub(rettime, calltime);
        duration = (unsigned long long)ktime_to_ns(delta) >> 10;

        bt_dev_info(hdev, "Device moved to D0 in %llu usecs", duration);

        return 0;
}

static int btintel_boot(struct hci_dev *hdev, u32 boot_addr)
{
        ktime_t calltime;
        int err;

        calltime = ktime_get();

        btintel_set_flag(hdev, INTEL_BOOTING);
        btintel_set_flag(hdev, INTEL_WAIT_FOR_D0);

        err = btintel_send_intel_reset(hdev, boot_addr);
        if (err) {
                bt_dev_err(hdev, "Intel Soft Reset failed (%d)", err);
                btintel_reset_to_bootloader(hdev);
                return err;
        }

        /* The bootloader will not indicate when the device is ready. This
         * is done by the operational firmware sending bootup notification.
         *
         * Booting into operational firmware should not take longer than
         * 5 second. However if that happens, then just fail the setup
         * since something went wrong.
         */
        err = btintel_boot_wait(hdev, calltime, 5000);
        if (err == -ETIMEDOUT) {
                btintel_reset_to_bootloader(hdev);
                goto exit_error;
        }

        if (hdev->bus == HCI_PCI) {
                /* In case of PCIe, after receiving bootup event, driver performs
                 * D0 entry by writing 0 to sleep control register (check
                 * btintel_pcie_recv_event())
                 * Firmware acks with alive interrupt indicating host is full ready to
                 * perform BT operation. Lets wait here till INTEL_WAIT_FOR_D0
                 * bit is cleared.
                 */
                calltime = ktime_get();
                err = btintel_boot_wait_d0(hdev, calltime, 2000);
        }

exit_error:
        return err;
}

static int btintel_get_fw_name(struct intel_version *ver,
                                             struct intel_boot_params *params,
                                             char *fw_name, size_t len,
                                             const char *suffix)
{
        switch (ver->hw_variant) {
        case 0x0b:      /* SfP */
        case 0x0c:      /* WsP */
                snprintf(fw_name, len, "intel/ibt-%u-%u.%s",
                         ver->hw_variant,
                         le16_to_cpu(params->dev_revid),
                         suffix);
                break;
        case 0x11:      /* JfP */
        case 0x12:      /* ThP */
        case 0x13:      /* HrP */
        case 0x14:      /* CcP */
                snprintf(fw_name, len, "intel/ibt-%u-%u-%u.%s",
                         ver->hw_variant,
                         ver->hw_revision,
                         ver->fw_revision,
                         suffix);
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int btintel_download_fw(struct hci_dev *hdev,
                                         struct intel_version *ver,
                                         struct intel_boot_params *params,
                                         u32 *boot_param)
{
        const struct firmware *fw;
        char fwname[64];
        int err;
        ktime_t calltime;

        if (!ver || !params)
                return -EINVAL;

        /* The firmware variant determines if the device is in bootloader
         * mode or is running operational firmware. The value 0x06 identifies
         * the bootloader and the value 0x23 identifies the operational
         * firmware.
         *
         * When the operational firmware is already present, then only
         * the check for valid Bluetooth device address is needed. This
         * determines if the device will be added as configured or
         * unconfigured controller.
         *
         * It is not possible to use the Secure Boot Parameters in this
         * case since that command is only available in bootloader mode.
         */
        if (ver->fw_variant == 0x23) {
                btintel_clear_flag(hdev, INTEL_BOOTLOADER);
                btintel_check_bdaddr(hdev);

                /* SfP and WsP don't seem to update the firmware version on file
                 * so version checking is currently possible.
                 */
                switch (ver->hw_variant) {
                case 0x0b:      /* SfP */
                case 0x0c:      /* WsP */
                        return 0;
                }

                /* Proceed to download to check if the version matches */
                goto download;
        }

        /* Read the secure boot parameters to identify the operating
         * details of the bootloader.
         */
        err = btintel_read_boot_params(hdev, params);
        if (err)
                return err;

        /* It is required that every single firmware fragment is acknowledged
         * with a command complete event. If the boot parameters indicate
         * that this bootloader does not send them, then abort the setup.
         */
        if (params->limited_cce != 0x00) {
                bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
                           params->limited_cce);
                return -EINVAL;
        }

        /* If the OTP has no valid Bluetooth device address, then there will
         * also be no valid address for the operational firmware.
         */
        if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
                bt_dev_info(hdev, "No device address configured");
                hci_set_quirk(hdev, HCI_QUIRK_INVALID_BDADDR);
        }

download:
        /* With this Intel bootloader only the hardware variant and device
         * revision information are used to select the right firmware for SfP
         * and WsP.
         *
         * The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
         *
         * Currently the supported hardware variants are:
         *   11 (0x0b) for iBT3.0 (LnP/SfP)
         *   12 (0x0c) for iBT3.5 (WsP)
         *
         * For ThP/JfP and for future SKU's, the FW name varies based on HW
         * variant, HW revision and FW revision, as these are dependent on CNVi
         * and RF Combination.
         *
         *   17 (0x11) for iBT3.5 (JfP)
         *   18 (0x12) for iBT3.5 (ThP)
         *
         * The firmware file name for these will be
         * ibt-<hw_variant>-<hw_revision>-<fw_revision>.sfi.
         *
         */
        err = btintel_get_fw_name(ver, params, fwname, sizeof(fwname), "sfi");
        if (err < 0) {
                if (!btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
                        /* Firmware has already been loaded */
                        btintel_set_flag(hdev, INTEL_FIRMWARE_LOADED);
                        return 0;
                }

                bt_dev_err(hdev, "Unsupported Intel firmware naming");
                return -EINVAL;
        }

        err = firmware_request_nowarn(&fw, fwname, &hdev->dev);
        if (err < 0) {
                if (!btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
                        /* Firmware has already been loaded */
                        btintel_set_flag(hdev, INTEL_FIRMWARE_LOADED);
                        return 0;
                }

                bt_dev_err(hdev, "Failed to load Intel firmware file %s (%d)",
                           fwname, err);
                return err;
        }

        bt_dev_info(hdev, "Found device firmware: %s", fwname);

        if (fw->size < 644) {
                bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
                           fw->size);
                err = -EBADF;
                goto done;
        }

        calltime = ktime_get();

        btintel_set_flag(hdev, INTEL_DOWNLOADING);

        /* Start firmware downloading and get boot parameter */
        err = btintel_download_firmware(hdev, ver, fw, boot_param);
        if (err < 0) {
                if (err == -EALREADY) {
                        /* Firmware has already been loaded */
                        btintel_set_flag(hdev, INTEL_FIRMWARE_LOADED);
                        err = 0;
                        goto done;
                }

                /* When FW download fails, send Intel Reset to retry
                 * FW download.
                 */
                btintel_reset_to_bootloader(hdev);
                goto done;
        }

        /* Before switching the device into operational mode and with that
         * booting the loaded firmware, wait for the bootloader notification
         * that all fragments have been successfully received.
         *
         * When the event processing receives the notification, then the
         * INTEL_DOWNLOADING flag will be cleared.
         *
         * The firmware loading should not take longer than 5 seconds
         * and thus just timeout if that happens and fail the setup
         * of this device.
         */
        err = btintel_download_wait(hdev, calltime, 5000);
        if (err == -ETIMEDOUT)
                btintel_reset_to_bootloader(hdev);

done:
        release_firmware(fw);
        return err;
}

static int btintel_bootloader_setup(struct hci_dev *hdev,
                                    struct intel_version *ver)
{
        struct intel_version new_ver;
        struct intel_boot_params params;
        u32 boot_param;
        char ddcname[64];
        int err;

        BT_DBG("%s", hdev->name);

        /* Set the default boot parameter to 0x0 and it is updated to
         * SKU specific boot parameter after reading Intel_Write_Boot_Params
         * command while downloading the firmware.
         */
        boot_param = 0x00000000;

        btintel_set_flag(hdev, INTEL_BOOTLOADER);

        err = btintel_download_fw(hdev, ver, &params, &boot_param);
        if (err)
                return err;

        /* controller is already having an operational firmware */
        if (ver->fw_variant == 0x23)
                goto finish;

        err = btintel_boot(hdev, boot_param);
        if (err)
                return err;

        btintel_clear_flag(hdev, INTEL_BOOTLOADER);

        err = btintel_get_fw_name(ver, &params, ddcname,
                                                sizeof(ddcname), "ddc");

        if (err < 0) {
                bt_dev_err(hdev, "Unsupported Intel firmware naming");
        } else {
                /* Once the device is running in operational mode, it needs to
                 * apply the device configuration (DDC) parameters.
                 *
                 * The device can work without DDC parameters, so even if it
                 * fails to load the file, no need to fail the setup.
                 */
                btintel_load_ddc_config(hdev, ddcname);
        }

        hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);

        /* Read the Intel version information after loading the FW  */
        err = btintel_read_version(hdev, &new_ver);
        if (err)
                return err;

        btintel_version_info(hdev, &new_ver);

finish:
        /* Set the event mask for Intel specific vendor events. This enables
         * a few extra events that are useful during general operation. It
         * does not enable any debugging related events.
         *
         * The device will function correctly without these events enabled
         * and thus no need to fail the setup.
         */
        btintel_set_event_mask(hdev, false);

        return 0;
}

static void btintel_get_fw_name_tlv(const struct intel_version_tlv *ver,
                                    char *fw_name, size_t len,
                                    const char *suffix)
{
        const char *format;
        u32 cnvi, cnvr;

        cnvi = INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvi_top),
                                        INTEL_CNVX_TOP_STEP(ver->cnvi_top));

        cnvr = INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvr_top),
                                        INTEL_CNVX_TOP_STEP(ver->cnvr_top));

        /* Only Blazar  product supports downloading of intermediate loader
         * image
         */
        if (INTEL_HW_VARIANT(ver->cnvi_bt) >= 0x1e) {
                u8 zero[BTINTEL_FWID_MAXLEN];

                if (ver->img_type == BTINTEL_IMG_BOOTLOADER) {
                        format = "intel/ibt-%04x-%04x-iml.%s";
                        snprintf(fw_name, len, format, cnvi, cnvr, suffix);
                        return;
                }

                memset(zero, 0, sizeof(zero));

                /* ibt-<cnvi_top type+cnvi_top step>-<cnvr_top type+cnvr_top step-fw_id> */
                if (memcmp(ver->fw_id, zero, sizeof(zero))) {
                        format = "intel/ibt-%04x-%04x-%s.%s";
                        snprintf(fw_name, len, format, cnvi, cnvr,
                                 ver->fw_id, suffix);
                        return;
                }
                /* If firmware id is not present, fallback to legacy naming
                 * convention
                 */
        }
        /* Fallback to legacy naming convention for other controllers
         * ibt-<cnvi_top type+cnvi_top step>-<cnvr_top type+cnvr_top step>
         */
        format = "intel/ibt-%04x-%04x.%s";
        snprintf(fw_name, len, format, cnvi, cnvr, suffix);
}

static void btintel_get_iml_tlv(const struct intel_version_tlv *ver,
                                char *fw_name, size_t len,
                                const char *suffix)
{
        const char *format;
        u32 cnvi, cnvr;

        cnvi = INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvi_top),
                                        INTEL_CNVX_TOP_STEP(ver->cnvi_top));

        cnvr = INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvr_top),
                                        INTEL_CNVX_TOP_STEP(ver->cnvr_top));

        format = "intel/ibt-%04x-%04x-iml.%s";
        snprintf(fw_name, len, format, cnvi, cnvr, suffix);
}

static int btintel_prepare_fw_download_tlv(struct hci_dev *hdev,
                                           struct intel_version_tlv *ver,
                                           u32 *boot_param)
{
        const struct firmware *fw;
        char fwname[128];
        int err;
        ktime_t calltime;

        if (!ver || !boot_param)
                return -EINVAL;

        /* The firmware variant determines if the device is in bootloader
         * mode or is running operational firmware. The value 0x03 identifies
         * the bootloader and the value 0x23 identifies the operational
         * firmware.
         *
         * When the operational firmware is already present, then only
         * the check for valid Bluetooth device address is needed. This
         * determines if the device will be added as configured or
         * unconfigured controller.
         *
         * It is not possible to use the Secure Boot Parameters in this
         * case since that command is only available in bootloader mode.
         */
        if (ver->img_type == BTINTEL_IMG_OP) {
                btintel_clear_flag(hdev, INTEL_BOOTLOADER);
                btintel_check_bdaddr(hdev);
        } else {
                /*
                 * Check for valid bd address in boot loader mode. Device
                 * will be marked as unconfigured if empty bd address is
                 * found.
                 */
                if (!bacmp(&ver->otp_bd_addr, BDADDR_ANY)) {
                        bt_dev_info(hdev, "No device address configured");
                        hci_set_quirk(hdev, HCI_QUIRK_INVALID_BDADDR);
                }
        }

        if (ver->img_type == BTINTEL_IMG_OP) {
                /* Controller running OP image. In case of FW downgrade,
                 * FWID TLV may not be present and driver may attempt to load
                 * firmware image which doesn't exist. Lets compare the version
                 * of IML image
                 */
                if (INTEL_HW_VARIANT(ver->cnvi_bt) >= 0x1e)
                        btintel_get_iml_tlv(ver, fwname, sizeof(fwname), "sfi");
                else
                        btintel_get_fw_name_tlv(ver, fwname, sizeof(fwname), "sfi");
        } else {
                btintel_get_fw_name_tlv(ver, fwname, sizeof(fwname), "sfi");
        }

        err = firmware_request_nowarn(&fw, fwname, &hdev->dev);
        if (err < 0) {
                if (!btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
                        /* Firmware has already been loaded */
                        btintel_set_flag(hdev, INTEL_FIRMWARE_LOADED);
                        return 0;
                }

                bt_dev_err(hdev, "Failed to load Intel firmware file %s (%d)",
                           fwname, err);

                return err;
        }

        bt_dev_info(hdev, "Found device firmware: %s", fwname);

        if (fw->size < 644) {
                bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
                           fw->size);
                err = -EBADF;
                goto done;
        }

        calltime = ktime_get();

        btintel_set_flag(hdev, INTEL_DOWNLOADING);

        /* Start firmware downloading and get boot parameter */
        err = btintel_download_fw_tlv(hdev, ver, fw, boot_param,
                                               INTEL_HW_VARIANT(ver->cnvi_bt),
                                               ver->sbe_type);
        if (err < 0) {
                if (err == -EALREADY) {
                        /* Firmware has already been loaded */
                        btintel_set_flag(hdev, INTEL_FIRMWARE_LOADED);
                        err = 0;
                        goto done;
                }

                /* When FW download fails, send Intel Reset to retry
                 * FW download.
                 */
                btintel_reset_to_bootloader(hdev);
                goto done;
        }

        /* Before switching the device into operational mode and with that
         * booting the loaded firmware, wait for the bootloader notification
         * that all fragments have been successfully received.
         *
         * When the event processing receives the notification, then the
         * BTUSB_DOWNLOADING flag will be cleared.
         *
         * The firmware loading should not take longer than 5 seconds
         * and thus just timeout if that happens and fail the setup
         * of this device.
         */
        err = btintel_download_wait(hdev, calltime, 5000);
        if (err == -ETIMEDOUT)
                btintel_reset_to_bootloader(hdev);

done:
        release_firmware(fw);
        return err;
}

static int btintel_get_codec_config_data(struct hci_dev *hdev,
                                         __u8 link, struct bt_codec *codec,
                                         __u8 *ven_len, __u8 **ven_data)
{
        int err = 0;

        if (!ven_data || !ven_len)
                return -EINVAL;

        *ven_len = 0;
        *ven_data = NULL;

        if (link != ESCO_LINK) {
                bt_dev_err(hdev, "Invalid link type(%u)", link);
                return -EINVAL;
        }

        *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
        if (!*ven_data) {
                err = -ENOMEM;
                goto error;
        }

        /* supports only CVSD and mSBC offload codecs */
        switch (codec->id) {
        case 0x02:
                **ven_data = 0x00;
                break;
        case 0x05:
                **ven_data = 0x01;
                break;
        default:
                err = -EINVAL;
                bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
                goto error;
        }
        /* codec and its capabilities are pre-defined to ids
         * preset id = 0x00 represents CVSD codec with sampling rate 8K
         * preset id = 0x01 represents mSBC codec with sampling rate 16K
         */
        *ven_len = sizeof(__u8);
        return err;

error:
        kfree(*ven_data);
        *ven_data = NULL;
        return err;
}

static int btintel_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
{
        /* Intel uses 1 as data path id for all the usecases */
        *data_path_id = 1;
        return 0;
}

static int btintel_configure_offload(struct hci_dev *hdev)
{
        struct sk_buff *skb;
        int err = 0;
        struct intel_offload_use_cases *use_cases;

        skb = __hci_cmd_sync(hdev, 0xfc86, 0, NULL, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reading offload use cases failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        if (skb->len < sizeof(*use_cases)) {
                err = -EIO;
                goto error;
        }

        use_cases = (void *)skb->data;

        if (use_cases->status) {
                err = -bt_to_errno(skb->data[0]);
                goto error;
        }

        if (use_cases->preset[0] & 0x03) {
                hdev->get_data_path_id = btintel_get_data_path_id;
                hdev->get_codec_config_data = btintel_get_codec_config_data;
        }
error:
        kfree_skb(skb);
        return err;
}

static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver)
{
        struct sk_buff *skb;
        struct hci_ppag_enable_cmd ppag_cmd;
        acpi_handle handle;
        struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
        union acpi_object *p, *elements;
        u32 domain, mode;
        acpi_status status;

        /* PPAG is not supported if CRF is HrP2, Jfp2, JfP1 */
        switch (ver->cnvr_top & 0xFFF) {
        case 0x504:     /* Hrp2 */
        case 0x202:     /* Jfp2 */
        case 0x201:     /* Jfp1 */
                bt_dev_dbg(hdev, "PPAG not supported for Intel CNVr (0x%3x)",
                           ver->cnvr_top & 0xFFF);
                return;
        }

        handle = ACPI_HANDLE(GET_HCIDEV_DEV(hdev));
        if (!handle) {
                bt_dev_info(hdev, "No support for BT device in ACPI firmware");
                return;
        }

        status = acpi_evaluate_object(handle, "PPAG", NULL, &buffer);
        if (ACPI_FAILURE(status)) {
                if (status == AE_NOT_FOUND) {
                        bt_dev_dbg(hdev, "PPAG-BT: ACPI entry not found");
                        return;
                }
                bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
                return;
        }

        p = buffer.pointer;
        if (p->type != ACPI_TYPE_PACKAGE || p->package.count != 2) {
                bt_dev_warn(hdev, "PPAG-BT: Invalid object type: %d or package count: %d",
                            p->type, p->package.count);
                kfree(buffer.pointer);
                return;
        }

        elements = p->package.elements;

        /* PPAG table is located at element[1] */
        p = &elements[1];

        domain = (u32)p->package.elements[0].integer.value;
        mode = (u32)p->package.elements[1].integer.value;
        kfree(buffer.pointer);

        if (domain != 0x12) {
                bt_dev_dbg(hdev, "PPAG-BT: Bluetooth domain is disabled in ACPI firmware");
                return;
        }

        /* PPAG mode
         * BIT 0 : 0 Disabled in EU
         *         1 Enabled in EU
         * BIT 1 : 0 Disabled in China
         *         1 Enabled in China
         */
        mode &= 0x03;

        if (!mode) {
                bt_dev_dbg(hdev, "PPAG-BT: EU, China mode are disabled in BIOS");
                return;
        }

        ppag_cmd.ppag_enable_flags = cpu_to_le32(mode);

        skb = __hci_cmd_sync(hdev, INTEL_OP_PPAG_CMD, sizeof(ppag_cmd),
                             &ppag_cmd, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_warn(hdev, "Failed to send PPAG Enable (%ld)", PTR_ERR(skb));
                return;
        }
        bt_dev_info(hdev, "PPAG-BT: Enabled (Mode %d)", mode);
        kfree_skb(skb);
}

static int btintel_acpi_reset_method(struct hci_dev *hdev)
{
        int ret = 0;
        acpi_status status;
        union acpi_object *p, *ref;
        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };

        status = acpi_evaluate_object(ACPI_HANDLE(GET_HCIDEV_DEV(hdev)), "_PRR", NULL, &buffer);
        if (ACPI_FAILURE(status)) {
                bt_dev_err(hdev, "Failed to run _PRR method");
                ret = -ENODEV;
                return ret;
        }
        p = buffer.pointer;

        if (p->package.count != 1 || p->type != ACPI_TYPE_PACKAGE) {
                bt_dev_err(hdev, "Invalid arguments");
                ret = -EINVAL;
                goto exit_on_error;
        }

        ref = &p->package.elements[0];
        if (ref->type != ACPI_TYPE_LOCAL_REFERENCE) {
                bt_dev_err(hdev, "Invalid object type: 0x%x", ref->type);
                ret = -EINVAL;
                goto exit_on_error;
        }

        status = acpi_evaluate_object(ref->reference.handle, "_RST", NULL, NULL);
        if (ACPI_FAILURE(status)) {
                bt_dev_err(hdev, "Failed to run_RST method");
                ret = -ENODEV;
                goto exit_on_error;
        }

exit_on_error:
        kfree(buffer.pointer);
        return ret;
}

static void btintel_set_dsm_reset_method(struct hci_dev *hdev,
                                         struct intel_version_tlv *ver_tlv)
{
        struct btintel_data *data = hci_get_priv(hdev);
        acpi_handle handle = ACPI_HANDLE(GET_HCIDEV_DEV(hdev));
        u8 reset_payload[4] = {0x01, 0x00, 0x01, 0x00};
        union acpi_object *obj, argv4;
        enum {
                RESET_TYPE_WDISABLE2,
                RESET_TYPE_VSEC
        };

        handle = ACPI_HANDLE(GET_HCIDEV_DEV(hdev));

        if (!handle) {
                bt_dev_dbg(hdev, "No support for bluetooth device in ACPI firmware");
                return;
        }

        if (!acpi_has_method(handle, "_PRR")) {
                bt_dev_err(hdev, "No support for _PRR ACPI method");
                return;
        }

        switch (ver_tlv->cnvi_top & 0xfff) {
        case 0x910: /* GalePeak2 */
                reset_payload[2] = RESET_TYPE_VSEC;
                break;
        default:
                /* WDISABLE2 is the default reset method */
                reset_payload[2] = RESET_TYPE_WDISABLE2;

                if (!acpi_check_dsm(handle, &btintel_guid_dsm, 0,
                                    BIT(DSM_SET_WDISABLE2_DELAY))) {
                        bt_dev_err(hdev, "No dsm support to set reset delay");
                        return;
                }
                argv4.integer.type = ACPI_TYPE_INTEGER;
                /* delay required to toggle BT power */
                argv4.integer.value = 160;
                obj = acpi_evaluate_dsm(handle, &btintel_guid_dsm, 0,
                                        DSM_SET_WDISABLE2_DELAY, &argv4);
                if (!obj) {
                        bt_dev_err(hdev, "Failed to call dsm to set reset delay");
                        return;
                }
                ACPI_FREE(obj);
        }

        bt_dev_info(hdev, "DSM reset method type: 0x%02x", reset_payload[2]);

        if (!acpi_check_dsm(handle, &btintel_guid_dsm, 0,
                            DSM_SET_RESET_METHOD)) {
                bt_dev_warn(hdev, "No support for dsm to set reset method");
                return;
        }
        argv4.buffer.type = ACPI_TYPE_BUFFER;
        argv4.buffer.length = sizeof(reset_payload);
        argv4.buffer.pointer = reset_payload;

        obj = acpi_evaluate_dsm(handle, &btintel_guid_dsm, 0,
                                DSM_SET_RESET_METHOD, &argv4);
        if (!obj) {
                bt_dev_err(hdev, "Failed to call dsm to set reset method");
                return;
        }
        ACPI_FREE(obj);
        data->acpi_reset_method = btintel_acpi_reset_method;
}

#define BTINTEL_ISODATA_HANDLE_BASE 0x900

static u8 btintel_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
{
        /*
         * Distinguish ISO data packets form ACL data packets
         * based on their connection handle value range.
         */
        if (iso_capable(hdev) && hci_skb_pkt_type(skb) == HCI_ACLDATA_PKT) {
                __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);

                if (hci_handle(handle) >= BTINTEL_ISODATA_HANDLE_BASE)
                        return HCI_ISODATA_PKT;
        }

        return hci_skb_pkt_type(skb);
}

/*
 * UefiCnvCommonDSBR UEFI variable provides information from the OEM platforms
 * if they have replaced the BRI (Bluetooth Radio Interface) resistor to
 * overcome the potential STEP errors on their designs. Based on the
 * configauration, bluetooth firmware shall adjust the BRI response line drive
 * strength. The below structure represents DSBR data.
 * struct {
 *      u8 header;
 *      u32 dsbr;
 * } __packed;
 *
 * header - defines revision number of the structure
 * dsbr - defines drive strength BRI response
 *      bit0
 *              0 - instructs bluetooth firmware to use default values
 *              1 - instructs bluetooth firmware to override default values
 *      bit3:1
 *              Reserved
 *      bit7:4
 *              DSBR override values (only if bit0 is set. Default value is 0xF
 *      bit31:7
 *              Reserved
 * Expected values for dsbr field:
 *      1. 0xF1 - indicates that the resistor on board is 33 Ohm
 *      2. 0x00 or 0xB1 - indicates that the resistor on board is 10 Ohm
 *      3. Non existing UEFI variable or invalid (none of the above) - indicates
 *         that the resistor on board is 10 Ohm
 * Even if uefi variable is not present, driver shall send 0xfc0a command to
 * firmware to use default values.
 *
 */
static int btintel_uefi_get_dsbr(u32 *dsbr_var)
{
        struct btintel_dsbr {
                u8 header;
                u32 dsbr;
        } __packed data;

        efi_status_t status;
        unsigned long data_size = sizeof(data);
        efi_guid_t guid = EFI_GUID(0xe65d8884, 0xd4af, 0x4b20, 0x8d, 0x03,
                                   0x77, 0x2e, 0xcc, 0x3d, 0xa5, 0x31);

        if (!IS_ENABLED(CONFIG_EFI))
                return -EOPNOTSUPP;

        if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
                return -EOPNOTSUPP;

        status = efi.get_variable(BTINTEL_EFI_DSBR, &guid, NULL, &data_size,
                                  &data);

        if (status != EFI_SUCCESS || data_size != sizeof(data))
                return -ENXIO;

        *dsbr_var = data.dsbr;
        return 0;
}

static int btintel_set_dsbr(struct hci_dev *hdev, struct intel_version_tlv *ver)
{
        struct btintel_dsbr_cmd {
                u8 enable;
                u8 dsbr;
        } __packed;

        struct btintel_dsbr_cmd cmd;
        struct sk_buff *skb;
        u32 dsbr, cnvi;
        u8 status;
        int err;

        cnvi = ver->cnvi_top & 0xfff;
        /* DSBR command needs to be sent for,
         * 1. BlazarI or BlazarIW + B0 step product in IML image.
         * 2. Gale Peak2 or BlazarU in OP image.
         * 3. Scorpious Peak in IML image.
         */

        switch (cnvi) {
        case BTINTEL_CNVI_BLAZARI:
        case BTINTEL_CNVI_BLAZARIW:
                if (ver->img_type == BTINTEL_IMG_IML &&
                    INTEL_CNVX_TOP_STEP(ver->cnvi_top) == 0x01)
                        break;
                return 0;
        case BTINTEL_CNVI_GAP:
        case BTINTEL_CNVI_BLAZARU:
                if (ver->img_type == BTINTEL_IMG_OP &&
                    hdev->bus == HCI_USB)
                        break;
                return 0;
        case BTINTEL_CNVI_SCP:
                if (ver->img_type == BTINTEL_IMG_IML)
                        break;
                return 0;
        default:
                return 0;
        }

        dsbr = 0;
        err = btintel_uefi_get_dsbr(&dsbr);
        if (err < 0)
                bt_dev_dbg(hdev, "Error reading efi: %ls  (%d)",
                           BTINTEL_EFI_DSBR, err);

        cmd.enable = dsbr & BIT(0);
        cmd.dsbr = dsbr >> 4 & 0xF;

        bt_dev_info(hdev, "dsbr: enable: 0x%2.2x value: 0x%2.2x", cmd.enable,
                    cmd.dsbr);

        skb = __hci_cmd_sync(hdev, 0xfc0a, sizeof(cmd), &cmd,  HCI_CMD_TIMEOUT);
        if (IS_ERR(skb))
                return -bt_to_errno(PTR_ERR(skb));

        status = skb->data[0];
        kfree_skb(skb);

        if (status)
                return -bt_to_errno(status);

        return 0;
}

#ifdef CONFIG_ACPI
static acpi_status btintel_evaluate_acpi_method(struct hci_dev *hdev,
                                                acpi_string method,
                                                union acpi_object **ptr,
                                                u8 pkg_size)
{
        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
        union acpi_object *p;
        acpi_status status;
        acpi_handle handle;

        handle = ACPI_HANDLE(GET_HCIDEV_DEV(hdev));
        if (!handle) {
                bt_dev_dbg(hdev, "ACPI-BT: No ACPI support for Bluetooth device");
                return AE_NOT_EXIST;
        }

        status = acpi_evaluate_object(handle, method, NULL, &buffer);

        if (ACPI_FAILURE(status)) {
                bt_dev_dbg(hdev, "ACPI-BT: ACPI Failure: %s method: %s",
                           acpi_format_exception(status), method);
                return status;
        }

        p = buffer.pointer;

        if (p->type != ACPI_TYPE_PACKAGE || p->package.count < pkg_size) {
                bt_dev_warn(hdev, "ACPI-BT: Invalid object type: %d or package count: %d",
                            p->type, p->package.count);
                kfree(buffer.pointer);
                return AE_ERROR;
        }

        *ptr = buffer.pointer;
        return 0;
}

static union acpi_object *btintel_acpi_get_bt_pkg(union acpi_object *buffer)
{
        union acpi_object *domain, *bt_pkg;
        int i;

        for (i = 1; i < buffer->package.count; i++) {
                bt_pkg = &buffer->package.elements[i];
                domain = &bt_pkg->package.elements[0];
                if (domain->type == ACPI_TYPE_INTEGER &&
                    domain->integer.value == BTINTEL_BT_DOMAIN)
                        return bt_pkg;
        }
        return ERR_PTR(-ENOENT);
}

static int btintel_send_sar_ddc(struct hci_dev *hdev, struct btintel_cp_ddc_write *data, u8 len)
{
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, 0xfc8b, len, data, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_warn(hdev, "Failed to send sar ddc id:0x%4.4x (%ld)",
                            le16_to_cpu(data->id), PTR_ERR(skb));
                return PTR_ERR(skb);
        }
        kfree_skb(skb);
        return 0;
}

static int btintel_send_edr(struct hci_dev *hdev, struct btintel_cp_ddc_write *cmd,
                            int id, struct btintel_sar_inc_pwr *sar)
{
        cmd->len = 5;
        cmd->id = cpu_to_le16(id);
        cmd->data[0] = sar->br >> 3;
        cmd->data[1] = sar->edr2 >> 3;
        cmd->data[2] = sar->edr3 >> 3;
        return btintel_send_sar_ddc(hdev, cmd, 6);
}

static int btintel_send_le(struct hci_dev *hdev, struct btintel_cp_ddc_write *cmd,
                           int id, struct btintel_sar_inc_pwr *sar)
{
        cmd->len = 3;
        cmd->id = cpu_to_le16(id);
        cmd->data[0] = min3(sar->le, sar->le_lr, sar->le_2mhz) >> 3;
        return btintel_send_sar_ddc(hdev, cmd, 4);
}

static int btintel_send_br(struct hci_dev *hdev, struct btintel_cp_ddc_write *cmd,
                           int id, struct btintel_sar_inc_pwr *sar)
{
        cmd->len = 3;
        cmd->id = cpu_to_le16(id);
        cmd->data[0] = sar->br >> 3;
        return btintel_send_sar_ddc(hdev, cmd, 4);
}

static int btintel_send_br_mutual(struct hci_dev *hdev, struct btintel_cp_ddc_write *cmd,
                                  int id, struct btintel_sar_inc_pwr *sar)
{
        cmd->len = 3;
        cmd->id = cpu_to_le16(id);
        cmd->data[0] = sar->br;
        return btintel_send_sar_ddc(hdev, cmd, 4);
}

static int btintel_send_edr2(struct hci_dev *hdev, struct btintel_cp_ddc_write *cmd,
                             int id, struct btintel_sar_inc_pwr *sar)
{
        cmd->len = 3;
        cmd->id = cpu_to_le16(id);
        cmd->data[0] = sar->edr2;
        return btintel_send_sar_ddc(hdev, cmd, 4);
}

static int btintel_send_edr3(struct hci_dev *hdev, struct btintel_cp_ddc_write *cmd,
                             int id, struct btintel_sar_inc_pwr *sar)
{
        cmd->len = 3;
        cmd->id = cpu_to_le16(id);
        cmd->data[0] = sar->edr3;
        return btintel_send_sar_ddc(hdev, cmd, 4);
}

static int btintel_set_legacy_sar(struct hci_dev *hdev, struct btintel_sar_inc_pwr *sar)
{
        struct btintel_cp_ddc_write *cmd;
        u8 buffer[64];
        int ret;

        cmd = (void *)buffer;
        ret = btintel_send_br(hdev, cmd, 0x0131, sar);
        if (ret)
                return ret;

        ret = btintel_send_br(hdev, cmd, 0x0132, sar);
        if (ret)
                return ret;

        ret = btintel_send_le(hdev, cmd, 0x0133, sar);
        if (ret)
                return ret;

        ret = btintel_send_edr(hdev, cmd, 0x0137, sar);
        if (ret)
                return ret;

        ret = btintel_send_edr(hdev, cmd, 0x0138, sar);
        if (ret)
                return ret;

        ret = btintel_send_edr(hdev, cmd, 0x013b, sar);
        if (ret)
                return ret;

        ret = btintel_send_edr(hdev, cmd, 0x013c, sar);

        return ret;
}

static int btintel_set_mutual_sar(struct hci_dev *hdev, struct btintel_sar_inc_pwr *sar)
{
        struct btintel_cp_ddc_write *cmd;
        struct sk_buff *skb;
        u8 buffer[64];
        bool enable;
        int ret;

        cmd = (void *)buffer;

        cmd->len = 3;
        cmd->id = cpu_to_le16(0x019e);

        if (sar->revision == BTINTEL_SAR_INC_PWR &&
            sar->inc_power_mode == BTINTEL_SAR_INC_PWR_SUPPORTED)
                cmd->data[0] = 0x01;
        else
                cmd->data[0] = 0x00;

        ret = btintel_send_sar_ddc(hdev, cmd, 4);
        if (ret)
                return ret;

        if (sar->revision == BTINTEL_SAR_INC_PWR &&
            sar->inc_power_mode == BTINTEL_SAR_INC_PWR_SUPPORTED) {
                cmd->len = 3;
                cmd->id = cpu_to_le16(0x019f);
                cmd->data[0] = sar->sar_2400_chain_a;

                ret = btintel_send_sar_ddc(hdev, cmd, 4);
                if (ret)
                        return ret;
        }

        ret = btintel_send_br_mutual(hdev, cmd, 0x01a0, sar);
        if (ret)
                return ret;

        ret = btintel_send_edr2(hdev, cmd, 0x01a1, sar);
        if (ret)
                return ret;

        ret = btintel_send_edr3(hdev, cmd, 0x01a2, sar);
        if (ret)
                return ret;

        ret = btintel_send_le(hdev, cmd, 0x01a3, sar);
        if (ret)
                return ret;

        enable = true;
        skb = __hci_cmd_sync(hdev, 0xfe25, 1, &enable, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_warn(hdev, "Failed to send Intel SAR Enable (%ld)", PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        kfree_skb(skb);
        return 0;
}

static int btintel_sar_send_to_device(struct hci_dev *hdev, struct btintel_sar_inc_pwr *sar,
                                      struct intel_version_tlv *ver)
{
        u16 cnvi, cnvr;
        int ret;

        cnvi = ver->cnvi_top & 0xfff;
        cnvr = ver->cnvr_top & 0xfff;

        if (cnvi < BTINTEL_CNVI_BLAZARI && cnvr < BTINTEL_CNVR_FMP2) {
                bt_dev_info(hdev, "Applying legacy Bluetooth SAR");
                ret = btintel_set_legacy_sar(hdev, sar);
        } else if (cnvi == BTINTEL_CNVI_GAP || cnvr == BTINTEL_CNVR_FMP2) {
                bt_dev_info(hdev, "Applying mutual Bluetooth SAR");
                ret = btintel_set_mutual_sar(hdev, sar);
        } else {
                ret = -EOPNOTSUPP;
        }

        return ret;
}

static int btintel_acpi_set_sar(struct hci_dev *hdev, struct intel_version_tlv *ver)
{
        union acpi_object *bt_pkg, *buffer = NULL;
        struct btintel_sar_inc_pwr sar;
        acpi_status status;
        u8 revision;
        int ret;

        status = btintel_evaluate_acpi_method(hdev, "BRDS", &buffer, 2);
        if (ACPI_FAILURE(status))
                return -ENOENT;

        bt_pkg = btintel_acpi_get_bt_pkg(buffer);

        if (IS_ERR(bt_pkg)) {
                ret = PTR_ERR(bt_pkg);
                goto error;
        }

        if (!bt_pkg->package.count) {
                ret = -EINVAL;
                goto error;
        }

        revision = buffer->package.elements[0].integer.value;

        if (revision > BTINTEL_SAR_INC_PWR) {
                bt_dev_dbg(hdev, "BT_SAR: revision: 0x%2.2x not supported", revision);
                ret = -EOPNOTSUPP;
                goto error;
        }

        memset(&sar, 0, sizeof(sar));

        if (revision == BTINTEL_SAR_LEGACY && bt_pkg->package.count == 8) {
                sar.revision = revision;
                sar.bt_sar_bios = bt_pkg->package.elements[1].integer.value;
                sar.br = bt_pkg->package.elements[2].integer.value;
                sar.edr2 = bt_pkg->package.elements[3].integer.value;
                sar.edr3 = bt_pkg->package.elements[4].integer.value;
                sar.le = bt_pkg->package.elements[5].integer.value;
                sar.le_2mhz = bt_pkg->package.elements[6].integer.value;
                sar.le_lr  = bt_pkg->package.elements[7].integer.value;

        } else if (revision == BTINTEL_SAR_INC_PWR && bt_pkg->package.count == 10) {
                sar.revision = revision;
                sar.bt_sar_bios = bt_pkg->package.elements[1].integer.value;
                sar.inc_power_mode = bt_pkg->package.elements[2].integer.value;
                sar.sar_2400_chain_a = bt_pkg->package.elements[3].integer.value;
                sar.br = bt_pkg->package.elements[4].integer.value;
                sar.edr2 = bt_pkg->package.elements[5].integer.value;
                sar.edr3 = bt_pkg->package.elements[6].integer.value;
                sar.le = bt_pkg->package.elements[7].integer.value;
                sar.le_2mhz = bt_pkg->package.elements[8].integer.value;
                sar.le_lr  = bt_pkg->package.elements[9].integer.value;
        } else {
                ret = -EINVAL;
                goto error;
        }

        /* Apply only if it is enabled in BIOS */
        if (sar.bt_sar_bios != 1) {
                bt_dev_dbg(hdev, "Bluetooth SAR is not enabled");
                ret = -EOPNOTSUPP;
                goto error;
        }

        ret = btintel_sar_send_to_device(hdev, &sar, ver);
error:
        kfree(buffer);
        return ret;
}
#endif /* CONFIG_ACPI */

static int btintel_set_specific_absorption_rate(struct hci_dev *hdev,
                                                struct intel_version_tlv *ver)
{
#ifdef CONFIG_ACPI
        return btintel_acpi_set_sar(hdev, ver);
#endif
        return 0;
}

int btintel_bootloader_setup_tlv(struct hci_dev *hdev,
                                 struct intel_version_tlv *ver)
{
        u32 boot_param;
        char ddcname[64];
        int err;
        struct intel_version_tlv new_ver;

        bt_dev_dbg(hdev, "");

        /* Set the default boot parameter to 0x0 and it is updated to
         * SKU specific boot parameter after reading Intel_Write_Boot_Params
         * command while downloading the firmware.
         */
        boot_param = 0x00000000;

        /* In case of PCIe, this function might get called multiple times with
         * same hdev instance if there is any error on firmware download.
         * Need to clear stale bits of previous firmware download attempt.
         */
        for (int i = 0; i < __INTEL_NUM_FLAGS; i++)
                btintel_clear_flag(hdev, i);

        btintel_set_flag(hdev, INTEL_BOOTLOADER);

        err = btintel_prepare_fw_download_tlv(hdev, ver, &boot_param);
        if (err)
                return err;

        /* check if controller is already having an operational firmware */
        if (ver->img_type == BTINTEL_IMG_OP)
                goto finish;

        err = btintel_boot(hdev, boot_param);
        if (err)
                return err;

        err = btintel_read_version_tlv(hdev, ver);
        if (err)
                return err;

        /* set drive strength of BRI response */
        err = btintel_set_dsbr(hdev, ver);
        if (err) {
                bt_dev_err(hdev, "Failed to send dsbr command (%d)", err);
                return err;
        }

        /* If image type returned is BTINTEL_IMG_IML, then controller supports
         * intermediate loader image
         */
        if (ver->img_type == BTINTEL_IMG_IML) {
                err = btintel_prepare_fw_download_tlv(hdev, ver, &boot_param);
                if (err)
                        return err;

                err = btintel_boot(hdev, boot_param);
                if (err)
                        return err;
        }

        btintel_clear_flag(hdev, INTEL_BOOTLOADER);

        btintel_get_fw_name_tlv(ver, ddcname, sizeof(ddcname), "ddc");
        /* Once the device is running in operational mode, it needs to
         * apply the device configuration (DDC) parameters.
         *
         * The device can work without DDC parameters, so even if it
         * fails to load the file, no need to fail the setup.
         */
        btintel_load_ddc_config(hdev, ddcname);

        /* Read supported use cases and set callbacks to fetch datapath id */
        btintel_configure_offload(hdev);

        hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);

        /* Send sar values to controller */
        btintel_set_specific_absorption_rate(hdev, ver);

        /* Set PPAG feature */
        btintel_set_ppag(hdev, ver);

        /* Read the Intel version information after loading the FW  */
        err = btintel_read_version_tlv(hdev, &new_ver);
        if (err)
                return err;

        btintel_version_info_tlv(hdev, &new_ver);

finish:
        /* Set the event mask for Intel specific vendor events. This enables
         * a few extra events that are useful during general operation. It
         * does not enable any debugging related events.
         *
         * The device will function correctly without these events enabled
         * and thus no need to fail the setup.
         */
        btintel_set_event_mask(hdev, false);

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_bootloader_setup_tlv);

void btintel_set_msft_opcode(struct hci_dev *hdev, u8 hw_variant)
{
        switch (hw_variant) {
        /* Legacy bootloader devices that supports MSFT Extension */
        case 0x11:      /* JfP */
        case 0x12:      /* ThP */
        case 0x13:      /* HrP */
        case 0x14:      /* CcP */
        /* All Intel new generation controllers support the Microsoft vendor
         * extension are using 0xFC1E for VsMsftOpCode.
         */
        case 0x17:
        case 0x18:
        case 0x19:
        case 0x1b:
        case 0x1c:
        case 0x1d:
        case 0x1e:
        case 0x1f:
        case 0x22:
                hci_set_msft_opcode(hdev, 0xFC1E);
                break;
        default:
                /* Not supported */
                break;
        }
}
EXPORT_SYMBOL_GPL(btintel_set_msft_opcode);

void btintel_print_fseq_info(struct hci_dev *hdev)
{
        struct sk_buff *skb;
        u8 *p;
        u32 val;
        const char *str;

        skb = __hci_cmd_sync(hdev, 0xfcb3, 0, NULL, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_dbg(hdev, "Reading fseq status command failed (%ld)",
                           PTR_ERR(skb));
                return;
        }

        if (skb->len < (sizeof(u32) * 16 + 2)) {
                bt_dev_dbg(hdev, "Malformed packet of length %u received",
                           skb->len);
                kfree_skb(skb);
                return;
        }

        p = skb_pull_data(skb, 1);
        if (*p) {
                bt_dev_dbg(hdev, "Failed to get fseq status (0x%2.2x)", *p);
                kfree_skb(skb);
                return;
        }

        p = skb_pull_data(skb, 1);
        switch (*p) {
        case 0:
                str = "Success";
                break;
        case 1:
                str = "Fatal error";
                break;
        case 2:
                str = "Semaphore acquire error";
                break;
        default:
                str = "Unknown error";
                break;
        }

        if (*p) {
                bt_dev_err(hdev, "Fseq status: %s (0x%2.2x)", str, *p);
                kfree_skb(skb);
                return;
        }

        bt_dev_info(hdev, "Fseq status: %s (0x%2.2x)", str, *p);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Reason: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Global version: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Installed version: 0x%8.8x", val);

        p = skb->data;
        skb_pull_data(skb, 4);
        bt_dev_info(hdev, "Fseq executed: %2.2u.%2.2u.%2.2u.%2.2u", p[0], p[1],
                    p[2], p[3]);

        p = skb->data;
        skb_pull_data(skb, 4);
        bt_dev_info(hdev, "Fseq BT Top: %2.2u.%2.2u.%2.2u.%2.2u", p[0], p[1],
                    p[2], p[3]);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq Top init version: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq Cnvio init version: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq MBX Wifi file version: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq BT version: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq Top reset address: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq MBX timeout: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq MBX ack: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq CNVi id: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq CNVr id: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq Error handle: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq Magic noalive indication: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq OTP version: 0x%8.8x", val);

        val = get_unaligned_le32(skb_pull_data(skb, 4));
        bt_dev_dbg(hdev, "Fseq MBX otp version: 0x%8.8x", val);

        kfree_skb(skb);
}
EXPORT_SYMBOL_GPL(btintel_print_fseq_info);

static int btintel_setup_combined(struct hci_dev *hdev)
{
        const u8 param[1] = { 0xFF };
        struct intel_version ver;
        struct intel_version_tlv ver_tlv;
        struct sk_buff *skb;
        int err;

        BT_DBG("%s", hdev->name);

        /* The some controllers have a bug with the first HCI command sent to it
         * returning number of completed commands as zero. This would stall the
         * command processing in the Bluetooth core.
         *
         * As a workaround, send HCI Reset command first which will reset the
         * number of completed commands and allow normal command processing
         * from now on.
         *
         * Regarding the INTEL_BROKEN_SHUTDOWN_LED flag, these devices maybe
         * in the SW_RFKILL ON state as a workaround of fixing LED issue during
         * the shutdown() procedure, and once the device is in SW_RFKILL ON
         * state, the only way to exit out of it is sending the HCI_Reset
         * command.
         */
        if (btintel_test_flag(hdev, INTEL_BROKEN_INITIAL_NCMD) ||
            btintel_test_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED)) {
                skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
                                     HCI_INIT_TIMEOUT);
                if (IS_ERR(skb)) {
                        bt_dev_err(hdev,
                                   "sending initial HCI reset failed (%ld)",
                                   PTR_ERR(skb));
                        return PTR_ERR(skb);
                }
                kfree_skb(skb);
        }

        /* Starting from TyP device, the command parameter and response are
         * changed even though the OCF for HCI_Intel_Read_Version command
         * remains same. The legacy devices can handle even if the
         * command has a parameter and returns a correct version information.
         * So, it uses new format to support both legacy and new format.
         */
        skb = __hci_cmd_sync(hdev, 0xfc05, 1, param, HCI_CMD_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "Reading Intel version command failed (%ld)",
                           PTR_ERR(skb));
                return PTR_ERR(skb);
        }

        /* Check the status */
        if (skb->data[0]) {
                bt_dev_err(hdev, "Intel Read Version command failed (%02x)",
                           skb->data[0]);
                err = -EIO;
                goto exit_error;
        }

        /* Apply the common HCI quirks for Intel device */
        hci_set_quirk(hdev, HCI_QUIRK_STRICT_DUPLICATE_FILTER);
        hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
        hci_set_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_DIAG);

        /* Set up the quality report callback for Intel devices */
        hdev->set_quality_report = btintel_set_quality_report;

        /* For Legacy device, check the HW platform value and size */
        if (skb->len == sizeof(ver) && skb->data[1] == 0x37) {
                bt_dev_dbg(hdev, "Read the legacy Intel version information");

                memcpy(&ver, skb->data, sizeof(ver));

                /* Display version information */
                btintel_version_info(hdev, &ver);

                /* Check for supported iBT hardware variants of this firmware
                 * loading method.
                 *
                 * This check has been put in place to ensure correct forward
                 * compatibility options when newer hardware variants come
                 * along.
                 */
                switch (ver.hw_variant) {
                case 0x07:      /* WP */
                case 0x08:      /* StP */
                        /* Legacy ROM product */
                        btintel_set_flag(hdev, INTEL_ROM_LEGACY);

                        /* Apply the device specific HCI quirks
                         *
                         * WBS for SdP - For the Legacy ROM products, only SdP
                         * supports the WBS. But the version information is not
                         * enough to use here because the StP2 and SdP have same
                         * hw_variant and fw_variant. So, this flag is set by
                         * the transport driver (btusb) based on the HW info
                         * (idProduct)
                         */
                        if (!btintel_test_flag(hdev,
                                               INTEL_ROM_LEGACY_NO_WBS_SUPPORT))
                                hci_set_quirk(hdev,
                                              HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);

                        err = btintel_legacy_rom_setup(hdev, &ver);
                        break;
                case 0x0b:      /* SfP */
                case 0x11:      /* JfP */
                case 0x12:      /* ThP */
                case 0x13:      /* HrP */
                case 0x14:      /* CcP */
                        fallthrough;
                case 0x0c:      /* WsP */
                        /* Apply the device specific HCI quirks
                         *
                         * All Legacy bootloader devices support WBS
                         */
                        hci_set_quirk(hdev,
                                      HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);

                        /* These variants don't seem to support LE Coded PHY */
                        hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LE_CODED);

                        /* Setup MSFT Extension support */
                        btintel_set_msft_opcode(hdev, ver.hw_variant);

                        err = btintel_bootloader_setup(hdev, &ver);
                        btintel_register_devcoredump_support(hdev);
                        break;
                default:
                        bt_dev_err(hdev, "Unsupported Intel hw variant (%u)",
                                   ver.hw_variant);
                        err = -EINVAL;
                }

                hci_set_hw_info(hdev,
                                "INTEL platform=%u variant=%u revision=%u",
                                ver.hw_platform, ver.hw_variant,
                                ver.hw_revision);

                goto exit_error;
        }

        /* memset ver_tlv to start with clean state as few fields are exclusive
         * to bootloader mode and are not populated in operational mode
         */
        memset(&ver_tlv, 0, sizeof(ver_tlv));
        /* For TLV type device, parse the tlv data */
        err = btintel_parse_version_tlv(hdev, &ver_tlv, skb);
        if (err) {
                bt_dev_err(hdev, "Failed to parse TLV version information");
                goto exit_error;
        }

        if (INTEL_HW_PLATFORM(ver_tlv.cnvi_bt) != 0x37) {
                bt_dev_err(hdev, "Unsupported Intel hardware platform (0x%2x)",
                           INTEL_HW_PLATFORM(ver_tlv.cnvi_bt));
                err = -EINVAL;
                goto exit_error;
        }

        /* Check for supported iBT hardware variants of this firmware
         * loading method.
         *
         * This check has been put in place to ensure correct forward
         * compatibility options when newer hardware variants come
         * along.
         */
        switch (INTEL_HW_VARIANT(ver_tlv.cnvi_bt)) {
        case 0x11:      /* JfP */
        case 0x12:      /* ThP */
        case 0x13:      /* HrP */
        case 0x14:      /* CcP */
                /* Some legacy bootloader devices starting from JfP,
                 * the operational firmware supports both old and TLV based
                 * HCI_Intel_Read_Version command based on the command
                 * parameter.
                 *
                 * For upgrading firmware case, the TLV based version cannot
                 * be used because the firmware filename for legacy bootloader
                 * is based on the old format.
                 *
                 * Also, it is not easy to convert TLV based version from the
                 * legacy version format.
                 *
                 * So, as a workaround for those devices, use the legacy
                 * HCI_Intel_Read_Version to get the version information and
                 * run the legacy bootloader setup.
                 */
                err = btintel_read_version(hdev, &ver);
                if (err)
                        break;

                /* Apply the device specific HCI quirks
                 *
                 * All Legacy bootloader devices support WBS
                 */
                hci_set_quirk(hdev, HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);

                /* These variants don't seem to support LE Coded PHY */
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LE_CODED);

                /* Setup MSFT Extension support */
                btintel_set_msft_opcode(hdev, ver.hw_variant);

                err = btintel_bootloader_setup(hdev, &ver);
                btintel_register_devcoredump_support(hdev);
                break;
        case 0x18: /* GfP2 */
        case 0x1c: /* GaP */
                /* Re-classify packet type for controllers with LE audio */
                hdev->classify_pkt_type = btintel_classify_pkt_type;
                fallthrough;
        case 0x17:
        case 0x19:
        case 0x1b:
        case 0x1d:
        case 0x1e:
        case 0x1f:
        case 0x22:
                /* Display version information of TLV type */
                btintel_version_info_tlv(hdev, &ver_tlv);

                /* Apply the device specific HCI quirks for TLV based devices
                 *
                 * All TLV based devices support WBS
                 */
                hci_set_quirk(hdev, HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);

                /* Setup MSFT Extension support */
                btintel_set_msft_opcode(hdev,
                                        INTEL_HW_VARIANT(ver_tlv.cnvi_bt));
                btintel_set_dsm_reset_method(hdev, &ver_tlv);

                err = btintel_bootloader_setup_tlv(hdev, &ver_tlv);
                if (err)
                        goto exit_error;

                btintel_register_devcoredump_support(hdev);
                btintel_print_fseq_info(hdev);
                break;
        default:
                bt_dev_err(hdev, "Unsupported Intel hw variant (%u)",
                           INTEL_HW_VARIANT(ver_tlv.cnvi_bt));
                err = -EINVAL;
                break;
        }

        hci_set_hw_info(hdev, "INTEL platform=%u variant=%u",
                        INTEL_HW_PLATFORM(ver_tlv.cnvi_bt),
                        INTEL_HW_VARIANT(ver_tlv.cnvi_bt));

exit_error:
        kfree_skb(skb);

        return err;
}

int btintel_shutdown_combined(struct hci_dev *hdev)
{
        struct sk_buff *skb;
        int ret;

        /* Send HCI Reset to the controller to stop any BT activity which
         * were triggered. This will help to save power and maintain the
         * sync b/w Host and controller
         */
        skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "HCI reset during shutdown failed");
                return PTR_ERR(skb);
        }
        kfree_skb(skb);


        /* Some platforms have an issue with BT LED when the interface is
         * down or BT radio is turned off, which takes 5 seconds to BT LED
         * goes off. As a workaround, sends HCI_Intel_SW_RFKILL to put the
         * device in the RFKILL ON state which turns off the BT LED immediately.
         */
        if (btintel_test_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED)) {
                skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
                if (IS_ERR(skb)) {
                        ret = PTR_ERR(skb);
                        bt_dev_err(hdev, "turning off Intel device LED failed");
                        return ret;
                }
                kfree_skb(skb);
        }

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_shutdown_combined);

int btintel_configure_setup(struct hci_dev *hdev, const char *driver_name)
{
        hdev->manufacturer = 2;
        hdev->setup = btintel_setup_combined;
        hdev->shutdown = btintel_shutdown_combined;
        hdev->hw_error = btintel_hw_error;
        hdev->set_diag = btintel_set_diag_combined;
        hdev->set_bdaddr = btintel_set_bdaddr;

        coredump_info.driver_name = driver_name;

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_configure_setup);

static int btintel_diagnostics(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct intel_tlv *tlv = (void *)&skb->data[5];

        /* The first event is always an event type TLV */
        if (tlv->type != INTEL_TLV_TYPE_ID)
                goto recv_frame;

        switch (tlv->val[0]) {
        case INTEL_TLV_SYSTEM_EXCEPTION:
        case INTEL_TLV_FATAL_EXCEPTION:
        case INTEL_TLV_DEBUG_EXCEPTION:
        case INTEL_TLV_TEST_EXCEPTION:
                /* Generate devcoredump from exception */
                if (!hci_devcd_init(hdev, skb->len)) {
                        hci_devcd_append(hdev, skb_clone(skb, GFP_ATOMIC));
                        hci_devcd_complete(hdev);
                } else {
                        bt_dev_err(hdev, "Failed to generate devcoredump");
                }
        break;
        default:
                bt_dev_err(hdev, "Invalid exception type %02X", tlv->val[0]);
        }

recv_frame:
        return hci_recv_frame(hdev, skb);
}

int btintel_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct hci_event_hdr *hdr = (void *)skb->data;
        const char diagnostics_hdr[] = { 0x87, 0x80, 0x03 };

        if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
            hdr->plen > 0) {
                const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
                unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;

                if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
                        switch (skb->data[2]) {
                        case 0x02:
                                /* When switching to the operational firmware
                                 * the device sends a vendor specific event
                                 * indicating that the bootup completed.
                                 */
                                btintel_bootup(hdev, ptr, len);
                                kfree_skb(skb);
                                return 0;
                        case 0x06:
                                /* When the firmware loading completes the
                                 * device sends out a vendor specific event
                                 * indicating the result of the firmware
                                 * loading.
                                 */
                                btintel_secure_send_result(hdev, ptr, len);
                                kfree_skb(skb);
                                return 0;
                        }
                }

                /* Handle all diagnostics events separately. May still call
                 * hci_recv_frame.
                 */
                if (len >= sizeof(diagnostics_hdr) &&
                    memcmp(&skb->data[2], diagnostics_hdr,
                           sizeof(diagnostics_hdr)) == 0) {
                        return btintel_diagnostics(hdev, skb);
                }
        }

        return hci_recv_frame(hdev, skb);
}
EXPORT_SYMBOL_GPL(btintel_recv_event);

void btintel_bootup(struct hci_dev *hdev, const void *ptr, unsigned int len)
{
        const struct intel_bootup *evt = ptr;

        if (len != sizeof(*evt))
                return;

        if (btintel_test_and_clear_flag(hdev, INTEL_BOOTING))
                btintel_wake_up_flag(hdev, INTEL_BOOTING);
}
EXPORT_SYMBOL_GPL(btintel_bootup);

void btintel_secure_send_result(struct hci_dev *hdev,
                                const void *ptr, unsigned int len)
{
        const struct intel_secure_send_result *evt = ptr;

        if (len != sizeof(*evt))
                return;

        if (evt->result)
                btintel_set_flag(hdev, INTEL_FIRMWARE_FAILED);

        if (btintel_test_and_clear_flag(hdev, INTEL_DOWNLOADING) &&
            btintel_test_flag(hdev, INTEL_FIRMWARE_LOADED))
                btintel_wake_up_flag(hdev, INTEL_DOWNLOADING);
}
EXPORT_SYMBOL_GPL(btintel_secure_send_result);

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("intel/ibt-11-5.sfi");
MODULE_FIRMWARE("intel/ibt-11-5.ddc");
MODULE_FIRMWARE("intel/ibt-12-16.sfi");
MODULE_FIRMWARE("intel/ibt-12-16.ddc");