diff options
| -rw-r--r-- | drivers/misc/mei/nfc.c | 75 |
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); } |