aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/drivers/bluetooth/btintel.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/bluetooth/btintel.c')
-rw-r--r--drivers/bluetooth/btintel.c291
1 files changed, 285 insertions, 6 deletions
diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 5fa5be3c5598..88ce5f0ffc4b 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -18,7 +18,11 @@
#define VERSION "0.1"
-#define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
+#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
int btintel_check_bdaddr(struct hci_dev *hdev)
{
@@ -360,6 +364,144 @@ int btintel_read_version(struct hci_dev *hdev, struct intel_version *ver)
}
EXPORT_SYMBOL_GPL(btintel_read_version);
+void btintel_version_info_tlv(struct hci_dev *hdev, struct intel_version_tlv *version)
+{
+ const char *variant;
+
+ switch (version->img_type) {
+ case 0x01:
+ variant = "Bootloader";
+ 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);
+ goto done;
+ }
+
+ 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);
+
+done:
+ return;
+}
+EXPORT_SYMBOL_GPL(btintel_version_info_tlv);
+
+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;
+ }
+
+ /* 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;
+
+ tlv = (struct intel_tlv *)skb->data;
+ 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:
+ 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:
+ 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, tlv->len);
+ break;
+ default:
+ /* Ignore rest of information */
+ break;
+ }
+ /* consume the current tlv and move to next*/
+ skb_pull(skb, tlv->len + sizeof(*tlv));
+ }
+
+ kfree_skb(skb);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btintel_read_version_tlv);
+
/* ------- REGMAP IBT SUPPORT ------- */
#define IBT_REG_MODE_8BIT 0x00
@@ -626,12 +768,10 @@ int btintel_read_boot_params(struct hci_dev *hdev,
}
EXPORT_SYMBOL_GPL(btintel_read_boot_params);
-int btintel_download_firmware(struct hci_dev *hdev, const struct firmware *fw,
- u32 *boot_param)
+static int btintel_sfi_rsa_header_secure_send(struct hci_dev *hdev,
+ const struct firmware *fw)
{
int err;
- const u8 *fw_ptr;
- u32 frag_len;
/* Start the firmware download transaction with the Init fragment
* represented by the 128 bytes of CSS header.
@@ -660,8 +800,56 @@ int btintel_download_firmware(struct hci_dev *hdev, const struct firmware *fw,
goto done;
}
- fw_ptr = fw->data + 644;
+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,
+ u32 *boot_param, 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);
@@ -707,8 +895,99 @@ int btintel_download_firmware(struct hci_dev *hdev, const struct firmware *fw,
done:
return err;
}
+
+int btintel_download_firmware(struct hci_dev *hdev,
+ const struct firmware *fw,
+ u32 *boot_param)
+{
+ int err;
+
+ err = btintel_sfi_rsa_header_secure_send(hdev, fw);
+ if (err)
+ return err;
+
+ return btintel_download_firmware_payload(hdev, fw, boot_param,
+ RSA_HEADER_LEN);
+}
EXPORT_SYMBOL_GPL(btintel_download_firmware);
+int btintel_download_firmware_newgen(struct hci_dev *hdev,
+ const struct firmware *fw, u32 *boot_param,
+ u8 hw_variant, u8 sbe_type)
+{
+ int err;
+ u32 css_header_ver;
+
+ /* 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, boot_param, 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,
+ boot_param,
+ 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,
+ boot_param,
+ RSA_HEADER_LEN + ECDSA_HEADER_LEN);
+ if (err)
+ return err;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btintel_download_firmware_newgen);
+
void btintel_reset_to_bootloader(struct hci_dev *hdev)
{
struct intel_reset params;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.