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authorSamuel Ortiz <sameo@linux.intel.com>2013-04-11 03:03:30 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-10 18:56:53 -0700
commit91a6b95f20e338ef63e55422b1f037665fc6440a (patch)
treec6c35d55de8699d4ee949652922764350ac2c100 /drivers/misc
parent59fcd7c63abf0340f551f487264b67ff5f7a0b86 (diff)
downloadblackbird-op-linux-91a6b95f20e338ef63e55422b1f037665fc6440a.tar.gz
blackbird-op-linux-91a6b95f20e338ef63e55422b1f037665fc6440a.zip
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>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/nfc.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c
index 37d4b09bc795..33354d94c0c2 100644
--- a/drivers/misc/mei/nfc.c
+++ b/drivers/misc/mei/nfc.c
@@ -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);
}
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