drivers/nfc/st21nfca/vendor_cmds.c

Source file repositories/reference/linux-study-clean/drivers/nfc/st21nfca/vendor_cmds.c

File Facts

System
Linux kernel
Corpus path
drivers/nfc/st21nfca/vendor_cmds.c
Extension
.c
Size
8210 bytes
Lines
365
Domain
Driver Families
Bucket
drivers/nfc
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct get_param_data {
	u8 gate;
	u8 data;
} __packed;

static int st21nfca_factory_mode(struct nfc_dev *dev, void *data,
			       size_t data_len)
{
	struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);

	if (data_len != 1)
		return -EINVAL;

	pr_debug("factory mode: %x\n", ((u8 *)data)[0]);

	switch (((u8 *)data)[0]) {
	case ST21NFCA_FACTORY_MODE_ON:
		test_and_set_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks);
	break;
	case ST21NFCA_FACTORY_MODE_OFF:
		clear_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks);
	break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int st21nfca_hci_clear_all_pipes(struct nfc_dev *dev, void *data,
				      size_t data_len)
{
	struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);

	return nfc_hci_disconnect_all_gates(hdev);
}

static int st21nfca_hci_dm_put_data(struct nfc_dev *dev, void *data,
				  size_t data_len)
{
	struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);

	return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
				ST21NFCA_HCI_DM_PUTDATA, data,
				data_len, NULL);
}

static int st21nfca_hci_dm_update_aid(struct nfc_dev *dev, void *data,
				    size_t data_len)
{
	struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);

	return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
			ST21NFCA_HCI_DM_UPDATE_AID, data, data_len, NULL);
}

static int st21nfca_hci_dm_get_info(struct nfc_dev *dev, void *data,
				    size_t data_len)
{
	int r;
	struct sk_buff *msg, *skb;
	struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);

	r = nfc_hci_send_cmd(hdev,
			     ST21NFCA_DEVICE_MGNT_GATE,
			     ST21NFCA_HCI_DM_GETINFO,
			     data, data_len, &skb);
	if (r)
		goto exit;

	msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI,
					     HCI_DM_GET_INFO, skb->len);
	if (!msg) {
		r = -ENOMEM;
		goto free_skb;
	}

	if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
		kfree_skb(msg);
		r = -ENOBUFS;
		goto free_skb;
	}

	r = nfc_vendor_cmd_reply(msg);

free_skb:
	kfree_skb(skb);
exit:
	return r;
}

Annotation

Implementation Notes