// 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 <asm/unaligned.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 CMD_WRITE_BOOT_PARAMS   0xfc0e
struct cmd_write_boot_params {
        u32 boot_addr;
        u8  fw_build_num;
        u8  fw_build_ww;
        u8  fw_build_yy;
} __packed;

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);
                set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
        }

        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;
}

static 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);

        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));
                return;
        }
        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));
                return;
        }

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

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

        kfree_skb(skb);
}

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;
        }

        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->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);

static 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 */
                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 0x01:
                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",
                            version->secure_boot ? "enabled" : "disabled");
                bt_dev_info(hdev, "OTP lock is %s",
                            version->otp_lock ? "enabled" : "disabled");
                bt_dev_info(hdev, "API lock is %s",
                            version->api_lock ? "enabled" : "disabled");
                bt_dev_info(hdev, "Debug lock is %s",
                            version->debug_lock ? "enabled" : "disabled");
                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 0x03:
                variant = "Firmware";
                break;
        default:
                bt_dev_err(hdev, "Unsupported image type(%02x)", version->img_type);
                return -EINVAL;
        }

        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);

        return 0;
}

static 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 contatin 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;
                default:
                        /* Ignore rest of information */
                        break;
                }
                /* consume the current tlv and move to next*/
                skb_pull(skb, tlv->len + sizeof(*tlv));
        }

        return 0;
}

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 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(sizeof(*ctx), GFP_KERNEL);
        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, 0xfc01, 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",
                    params->secure_boot ? "enabled" : "disabled");

        bt_dev_info(hdev, "OTP lock is %s",
                    params->otp_lock ? "enabled" : "disabled");

        bt_dev_info(hdev, "API lock is %s",
                    params->api_lock ? "enabled" : "disabled");

        bt_dev_info(hdev, "Debug lock is %s",
                    params->debug_lock ? "enabled" : "disabled");

        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 fragement.
                 */
                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));

                        bt_dev_info(hdev, "Boot Address: 0x%x",
                                    le32_to_cpu(params->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 reading firmware file version in bootloader mode */
                if (ver->fw_variant == 0x06)
                        break;

                /* 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 reading firmware file version in bootloader mode */
        if (ver->img_type != 0x01) {
                /* 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 == 0x03)
                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;

        /* 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, 0xfc01, 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, 0x07, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00 };
        struct sk_buff *skb;

        if (!features)
                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);
        return 0;
}

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

        calltime = ktime_get();

        btintel_set_flag(hdev, INTEL_BOOTING);

        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
         * 1 second. However if that happens, then just fail the setup
         * since something went wrong.
         */
        err = btintel_boot_wait(hdev, calltime, 1000);
        if (err == -ETIMEDOUT)
                btintel_reset_to_bootloader(hdev);

        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",
                        le16_to_cpu(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",
                        le16_to_cpu(ver->hw_variant),
                        le16_to_cpu(ver->hw_revision),
                        le16_to_cpu(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");
                set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
        }

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;
        struct intel_debug_features features;

        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);
        }

        /* 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) {
                /* Set DDC mask for available debug features */
                btintel_set_debug_features(hdev, &features);
        }

        /* 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)
{
        /* The firmware file name for new generation controllers will be
         * ibt-<cnvi_top type+cnvi_top step>-<cnvr_top type+cnvr_top step>
         */
        snprintf(fw_name, len, "intel/ibt-%04x-%04x.%s",
                 INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvi_top),
                                          INTEL_CNVX_TOP_STEP(ver->cnvi_top)),
                 INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvr_top),
                                          INTEL_CNVX_TOP_STEP(ver->cnvr_top)),
                 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[64];
        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 == 0x03) {
                btintel_clear_flag(hdev, INTEL_BOOTLOADER);
                btintel_check_bdaddr(hdev);
        }

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

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

        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 == 0x03)
                goto finish;

        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 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) {
                /* Set DDC mask for available debug features */
                btintel_set_debug_features(hdev, &features);
        }

        /* 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;
}

static 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 genration controllers support the Microsoft vendor
         * extension are using 0xFC1E for VsMsftOpCode.
         */
        case 0x17:
        case 0x18:
        case 0x19:
                hci_set_msft_opcode(hdev, 0xFC1E);
                break;
        default:
                /* Not supported */
                break;
        }
}

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.
         */
        if (btintel_test_flag(hdev, INTEL_BROKEN_INITIAL_NCMD)) {
                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 */
        set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
        set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
        set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);

        /* 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 - SdP and Stp have a same hw_varaint but
                         * different fw_variant
                         */
                        if (ver.hw_variant == 0x08 && ver.fw_variant == 0x22)
                                set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
                                        &hdev->quirks);

                        /* These devices have an issue with LED which doesn't
                         * go off immediately during shutdown. Set the flag
                         * here to send the LED OFF command during shutdown.
                         */
                        btintel_set_flag(hdev, INTEL_BROKEN_LED);

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

                        /* Valid LE States quirk for JfP/ThP familiy */
                        if (ver.hw_variant == 0x11 || ver.hw_variant == 0x12)
                                set_bit(HCI_QUIRK_VALID_LE_STATES,
                                        &hdev->quirks);

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

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

                goto exit_error;
        }

        /* 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 from JfP supports both old
                 * and TLV based HCI_Intel_Read_Version command. But we don't
                 * want to use the TLV based setup routines for those legacy
                 * bootloader device.
                 *
                 * 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)
                        return err;
                err = btintel_bootloader_setup(hdev, &ver);
                break;
        case 0x17:
        case 0x18:
        case 0x19:
                /* 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
                 */
                set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);

                /* Valid LE States quirk for GfP */
                if (INTEL_HW_VARIANT(ver_tlv.cnvi_bt) == 0x18)
                        set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);

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

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

exit_error:
        kfree_skb(skb);

        return err;
}

static 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. This command turns off the BT LED immediately.
         */
        if (btintel_test_flag(hdev, INTEL_BROKEN_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;
}

int btintel_configure_setup(struct hci_dev *hdev)
{
        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;

        return 0;
}
EXPORT_SYMBOL_GPL(btintel_configure_setup);

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");