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path: root/drivers/misc/mei/nfc.c
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Diffstat (limited to 'drivers/misc/mei/nfc.c')
-rw-r--r--drivers/misc/mei/nfc.c88
1 files changed, 44 insertions, 44 deletions
diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c
index 3095fc514a65..622654323177 100644
--- a/drivers/misc/mei/nfc.c
+++ b/drivers/misc/mei/nfc.c
@@ -19,7 +19,8 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
-#include <linux/pci.h>
+#include <linux/slab.h>
+
#include <linux/mei_cl_bus.h>
#include "mei_dev.h"
@@ -87,14 +88,20 @@ struct mei_nfc_hci_hdr {
#define MEI_NFC_HEADER_SIZE 10
-/** mei_nfc_dev - NFC mei device
+/**
+ * struct mei_nfc_dev - NFC mei device
*
* @cl: NFC host client
* @cl_info: NFC info host client
* @init_work: perform connection to the info client
+ * @send_wq: send completion wait queue
* @fw_ivn: NFC Interface Version Number
* @vendor_id: NFC manufacturer ID
* @radio_type: NFC radio type
+ * @bus_name: bus name
+ *
+ * @req_id: message counter
+ * @recv_req_id: reception message counter
*/
struct mei_nfc_dev {
struct mei_cl *cl;
@@ -163,7 +170,7 @@ static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
return 0;
default:
- dev_err(&dev->pdev->dev, "Unknown radio type 0x%x\n",
+ dev_err(dev->dev, "Unknown radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
@@ -175,14 +182,14 @@ static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
ndev->bus_name = "pn544";
return 0;
default:
- dev_err(&dev->pdev->dev, "Unknown radio type 0x%x\n",
+ dev_err(dev->dev, "Unknown radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
}
default:
- dev_err(&dev->pdev->dev, "Unknown vendor ID 0x%x\n",
+ dev_err(dev->dev, "Unknown vendor ID 0x%x\n",
ndev->vendor_id);
return -EINVAL;
@@ -231,21 +238,21 @@ static int mei_nfc_connect(struct mei_nfc_dev *ndev)
ret = __mei_cl_send(cl, (u8 *)cmd, connect_length);
if (ret < 0) {
- dev_err(&dev->pdev->dev, "Could not send connect cmd\n");
+ dev_err(dev->dev, "Could not send connect cmd\n");
goto err;
}
bytes_recv = __mei_cl_recv(cl, (u8 *)reply, connect_resp_length);
if (bytes_recv < 0) {
- dev_err(&dev->pdev->dev, "Could not read connect response\n");
+ dev_err(dev->dev, "Could not read connect response\n");
ret = bytes_recv;
goto err;
}
- dev_info(&dev->pdev->dev, "IVN 0x%x Vendor ID 0x%x\n",
+ dev_info(dev->dev, "IVN 0x%x Vendor ID 0x%x\n",
connect_resp->fw_ivn, connect_resp->vendor_id);
- dev_info(&dev->pdev->dev, "ME FW %d.%d.%d.%d\n",
+ dev_info(dev->dev, "ME FW %d.%d.%d.%d\n",
connect_resp->me_major, connect_resp->me_minor,
connect_resp->me_hotfix, connect_resp->me_build);
@@ -279,7 +286,7 @@ static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd));
if (ret < 0) {
- dev_err(&dev->pdev->dev, "Could not send IF version cmd\n");
+ dev_err(dev->dev, "Could not send IF version cmd\n");
return ret;
}
@@ -293,7 +300,7 @@ static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length);
if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
- dev_err(&dev->pdev->dev, "Could not read IF version\n");
+ dev_err(dev->dev, "Could not read IF version\n");
ret = -EIO;
goto err;
}
@@ -319,7 +326,7 @@ static int mei_nfc_enable(struct mei_cl_device *cldev)
ret = mei_nfc_connect(ndev);
if (ret < 0) {
- dev_err(&dev->pdev->dev, "Could not connect to NFC");
+ dev_err(dev->dev, "Could not connect to NFC");
return ret;
}
@@ -342,9 +349,10 @@ static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
ndev = (struct mei_nfc_dev *) cldev->priv_data;
dev = ndev->cl->dev;
+ err = -ENOMEM;
mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL);
if (!mei_buf)
- return -ENOMEM;
+ goto out;
hdr = (struct mei_nfc_hci_hdr *) mei_buf;
hdr->cmd = MEI_NFC_CMD_HCI_SEND;
@@ -354,21 +362,19 @@ static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
hdr->data_size = length;
memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length);
-
err = __mei_cl_send(ndev->cl, mei_buf, length + MEI_NFC_HEADER_SIZE);
if (err < 0)
- return err;
-
- kfree(mei_buf);
+ goto out;
if (!wait_event_interruptible_timeout(ndev->send_wq,
ndev->recv_req_id == ndev->req_id, HZ)) {
- dev_err(&dev->pdev->dev, "NFC MEI command timeout\n");
+ dev_err(dev->dev, "NFC MEI command timeout\n");
err = -ETIME;
} else {
ndev->req_id++;
}
-
+out:
+ kfree(mei_buf);
return err;
}
@@ -419,8 +425,7 @@ static void mei_nfc_init(struct work_struct *work)
if (mei_cl_connect(cl_info, NULL) < 0) {
mutex_unlock(&dev->device_lock);
- dev_err(&dev->pdev->dev,
- "Could not connect to the NFC INFO ME client");
+ dev_err(dev->dev, "Could not connect to the NFC INFO ME client");
goto err;
}
@@ -428,21 +433,19 @@ static void mei_nfc_init(struct work_struct *work)
mutex_unlock(&dev->device_lock);
if (mei_nfc_if_version(ndev) < 0) {
- dev_err(&dev->pdev->dev, "Could not get the NFC interface version");
+ dev_err(dev->dev, "Could not get the NFC interface version");
goto err;
}
- dev_info(&dev->pdev->dev,
- "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
+ dev_info(dev->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
ndev->fw_ivn, ndev->vendor_id, ndev->radio_type);
mutex_lock(&dev->device_lock);
if (mei_cl_disconnect(cl_info) < 0) {
mutex_unlock(&dev->device_lock);
- dev_err(&dev->pdev->dev,
- "Could not disconnect the NFC INFO ME client");
+ dev_err(dev->dev, "Could not disconnect the NFC INFO ME client");
goto err;
}
@@ -450,15 +453,13 @@ 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");
+ dev_err(dev->dev, "Could not build the bus ID name\n");
return;
}
cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, &nfc_ops);
if (!cldev) {
- dev_err(&dev->pdev->dev,
- "Could not add the NFC device to the MEI bus\n");
+ dev_err(dev->dev, "Could not add the NFC device to the MEI bus\n");
goto err;
}
@@ -473,7 +474,6 @@ err:
mei_nfc_free(ndev);
mutex_unlock(&dev->device_lock);
- return;
}
@@ -481,7 +481,8 @@ int mei_nfc_host_init(struct mei_device *dev)
{
struct mei_nfc_dev *ndev = &nfc_dev;
struct mei_cl *cl_info, *cl = NULL;
- int i, ret;
+ struct mei_me_client *me_cl;
+ int ret;
/* already initialized */
if (ndev->cl_info)
@@ -499,40 +500,38 @@ int mei_nfc_host_init(struct mei_device *dev)
}
/* check for valid client id */
- i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
- if (i < 0) {
- dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
+ me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
+ if (!me_cl) {
+ dev_info(dev->dev, "nfc: failed to find the client\n");
ret = -ENOTTY;
goto err;
}
- cl_info->me_client_id = dev->me_clients[i].client_id;
+ cl_info->me_client_id = me_cl->client_id;
+ cl_info->cl_uuid = me_cl->props.protocol_name;
ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY);
if (ret)
goto err;
- cl_info->device_uuid = mei_nfc_info_guid;
list_add_tail(&cl_info->device_link, &dev->device_list);
/* check for valid client id */
- i = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
- if (i < 0) {
- dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
+ me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
+ if (!me_cl) {
+ dev_info(dev->dev, "nfc: failed to find the client\n");
ret = -ENOTTY;
goto err;
}
- cl->me_client_id = dev->me_clients[i].client_id;
+ cl->me_client_id = me_cl->client_id;
+ cl->cl_uuid = me_cl->props.protocol_name;
ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
if (ret)
goto err;
- cl->device_uuid = mei_nfc_guid;
-
-
list_add_tail(&cl->device_link, &dev->device_list);
ndev->req_id = 1;
@@ -552,6 +551,7 @@ err:
void mei_nfc_host_exit(struct mei_device *dev)
{
struct mei_nfc_dev *ndev = &nfc_dev;
+
cancel_work_sync(&ndev->init_work);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.