diff options
Diffstat (limited to 'drivers/bluetooth/btintel.c')
| -rw-r--r-- | drivers/bluetooth/btintel.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c index da47f6dccd38..5270d5513201 100644 --- a/drivers/bluetooth/btintel.c +++ b/drivers/bluetooth/btintel.c @@ -24,6 +24,7 @@ #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> @@ -640,6 +641,89 @@ 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) +{ + 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. + */ + 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; + } + + fw_ptr = fw->data + 644; + frag_len = 0; + + while (fw_ptr - fw->data < fw->size) { + struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len); + + /* 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) == 0xfc0e) { + /* The boot parameter is the first 32-bit value + * and rest of 3 octets are reserved. + */ + *boot_param = get_unaligned_le32(fw_ptr + sizeof(*cmd)); + + bt_dev_dbg(hdev, "boot_param=0x%x", *boot_param); + } + + 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; +} +EXPORT_SYMBOL_GPL(btintel_download_firmware); + MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION); MODULE_VERSION(VERSION); |