static int btqcomsmd_set_bdaddr(struct hci_dev *hdev,
const bdaddr_t *bdaddr)
{
struct sk_buff *skb;
u8 cmd[9];
int err;
cmd[0] = EDL_NVM_ACCESS_SET_REQ_CMD;
cmd[1] = 0x02; /* TAG ID */
cmd[2] = sizeof(bdaddr_t); /* size */
memcpy(cmd + 3, bdaddr, sizeof(bdaddr_t));
skb = __hci_cmd_sync_ev(hdev,
EDL_NVM_ACCESS_OPCODE,
sizeof(cmd), cmd,
HCI_VENDOR_PKT, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Change address command failed (%d)",
hdev->name, err);
return err;
}
kfree_skb(skb);
return 0;
}
static int btusb_setup_intel_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_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
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_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
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_ERR("%s Intel fw corrupted: invalid evt len",
hdev->name);
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_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
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_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
hdev->name, 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_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
le16_to_cpu(cmd->opcode));
kfree_skb(skb);
return -EFAULT;
}
if (memcmp(skb->data, evt_param, evt->plen)) {
BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
hdev->name, le16_to_cpu(cmd->opcode));
kfree_skb(skb);
return -EFAULT;
}
kfree_skb(skb);
return 0;
}
