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mei: nfc: Add NFC device to the MEI bus 

After building its bus name as a string based on its vendor id and radio
type, we can add it to the bus.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Samuel Ortiz 2013-04-11 03:03:30 +02:00 committed by Greg Kroah-Hartman
parent 59fcd7c63a
commit 91a6b95f20
1 changed files with 75 additions and 0 deletions
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75
drivers/misc/mei/nfc.c
View File

@ -102,6 +102,7 @@ struct mei_nfc_dev {
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
char *bus_name;
};
static struct mei_nfc_dev nfc_dev;
@ -115,6 +116,14 @@ static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d,
0x48, 0xa4, 0xef, 0xab,
0xba, 0x8a, 0x12, 0x06);
/* Vendors */
#define MEI_NFC_VENDOR_INSIDE 0x00
#define MEI_NFC_VENDOR_NXP 0x01
/* Radio types */
#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
#define MEI_NFC_VENDOR_NXP_PN544 0x01
static void mei_nfc_free(struct mei_nfc_dev *ndev)
{
if (ndev->cl) {
@ -130,6 +139,51 @@ static void mei_nfc_free(struct mei_nfc_dev *ndev)
}
}
static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
{
struct mei_device *dev;
if (!ndev->cl)
return -ENODEV;
dev = ndev->cl->dev;
switch (ndev->vendor_id) {
case MEI_NFC_VENDOR_INSIDE:
switch (ndev->radio_type) {
case MEI_NFC_VENDOR_INSIDE_UREAD:
ndev->bus_name = "microread";
return 0;
default:
dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
}
case MEI_NFC_VENDOR_NXP:
switch (ndev->radio_type) {
case MEI_NFC_VENDOR_NXP_PN544:
ndev->bus_name = "pn544";
return 0;
default:
dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
}
default:
dev_err(&dev->pdev->dev, "Unknow vendor ID 0x%x\n",
ndev->vendor_id);
return -EINVAL;
}
return 0;
}
static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
{
struct mei_device *dev;
@ -184,6 +238,7 @@ err:
static void mei_nfc_init(struct work_struct *work)
{
struct mei_device *dev;
struct mei_cl_device *cldev;
struct mei_nfc_dev *ndev;
struct mei_cl *cl_info;
@ -226,6 +281,23 @@ static void mei_nfc_init(struct work_struct *work)
mutex_unlock(&dev->device_lock);
if (mei_nfc_build_bus_name(ndev) < 0) {
dev_err(&dev->pdev->dev,
"Could not build the bus ID name\n");
return;
}
cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, NULL);
if (!cldev) {
dev_err(&dev->pdev->dev,
"Could not add the NFC device to the MEI bus\n");
goto err;
}
cldev->priv_data = ndev;
return;
err:
@ -307,5 +379,8 @@ void mei_nfc_host_exit(void)
{
struct mei_nfc_dev *ndev = &nfc_dev;
if (ndev->cl && ndev->cl->device)
mei_cl_remove_device(ndev->cl->device);
mei_nfc_free(ndev);
}