/**
* mei_open - the open function
*
* @inode: pointer to inode structure
* @file: pointer to file structure
e
* returns 0 on success, <0 on error
*/
static int mei_open(struct inode *inode, struct file *file)
{
struct miscdevice *misc = file->private_data;
struct pci_dev *pdev;
struct mei_cl *cl;
struct mei_device *dev;
int err;
err = -ENODEV;
if (!misc->parent)
goto out;
pdev = container_of(misc->parent, struct pci_dev, dev);
dev = pci_get_drvdata(pdev);
if (!dev)
goto out;
mutex_lock(&dev->device_lock);
err = -ENOMEM;
cl = mei_cl_allocate(dev);
if (!cl)
goto out_unlock;
err = -ENODEV;
if (dev->dev_state != MEI_DEV_ENABLED) {
dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
goto out_unlock;
}
err = -EMFILE;
if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) {
dev_err(&dev->pdev->dev, "open_handle_count exceded %d",
MEI_MAX_OPEN_HANDLE_COUNT);
goto out_unlock;
}
err = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
if (err)
goto out_unlock;
file->private_data = cl;
mutex_unlock(&dev->device_lock);
return nonseekable_open(inode, file);
out_unlock:
mutex_unlock(&dev->device_lock);
kfree(cl);
out:
return err;
}
/**
* mei_open - the open function
*
* @inode: pointer to inode structure
* @file: pointer to file structure
*
* returns 0 on success, <0 on error
*/
static int mei_open(struct inode *inode, struct file *file)
{
struct miscdevice *misc = file->private_data;
struct pci_dev *pdev;
struct mei_cl *cl;
struct mei_device *dev;
int err;
if (!misc->parent)
return -ENODEV;
pdev = container_of(misc->parent, struct pci_dev, dev);
dev = pci_get_drvdata(pdev);
if (!dev)
return -ENODEV;
mutex_lock(&dev->device_lock);
cl = NULL;
err = -ENODEV;
if (dev->dev_state != MEI_DEV_ENABLED) {
dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
goto err_unlock;
}
err = -ENOMEM;
cl = mei_cl_allocate(dev);
if (!cl)
goto err_unlock;
/* open_handle_count check is handled in the mei_cl_link */
err = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
if (err)
goto err_unlock;
file->private_data = cl;
mutex_unlock(&dev->device_lock);
return nonseekable_open(inode, file);
err_unlock:
mutex_unlock(&dev->device_lock);
kfree(cl);
return err;
}
int mei_nfc_host_init(struct mei_device *dev)
{
struct mei_nfc_dev *ndev;
struct mei_cl *cl_info, *cl = NULL;
struct mei_me_client *me_cl;
int ret;
/* in case of internal reset bail out
* as the device is already setup
*/
cl = mei_cl_bus_find_cl_by_uuid(dev, mei_nfc_guid);
if (cl)
return 0;
ndev = kzalloc(sizeof(struct mei_nfc_dev), GFP_KERNEL);
if (!ndev) {
ret = -ENOMEM;
goto err;
}
ndev->cl_info = mei_cl_allocate(dev);
ndev->cl = mei_cl_allocate(dev);
cl = ndev->cl;
cl_info = ndev->cl_info;
if (!cl || !cl_info) {
ret = -ENOMEM;
goto err;
}
/* check for valid client id */
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 = me_cl->client_id;
cl_info->cl_uuid = me_cl->props.protocol_name;
mei_me_cl_put(me_cl);
ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY);
if (ret)
goto err;
list_add_tail(&cl_info->device_link, &dev->device_list);
/* check for valid client id */
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 = me_cl->client_id;
cl->cl_uuid = me_cl->props.protocol_name;
mei_me_cl_put(me_cl);
ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
if (ret)
goto err;
list_add_tail(&cl->device_link, &dev->device_list);
ndev->req_id = 1;
INIT_WORK(&ndev->init_work, mei_nfc_init);
init_waitqueue_head(&ndev->send_wq);
schedule_work(&ndev->init_work);
return 0;
err:
mei_nfc_free(ndev);
return ret;
}
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;
/* already initialzed */
if (ndev->cl_info)
return 0;
ndev->cl_info = mei_cl_allocate(dev);
ndev->cl = mei_cl_allocate(dev);
cl = ndev->cl;
cl_info = ndev->cl_info;
if (!cl || !cl_info) {
ret = -ENOMEM;
goto err;
}
/* 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");
ret = -ENOENT;
goto err;
}
cl_info->me_client_id = dev->me_clients[i].client_id;
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");
ret = -ENOENT;
goto err;
}
cl->me_client_id = dev->me_clients[i].client_id;
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;
INIT_WORK(&ndev->init_work, mei_nfc_init);
init_waitqueue_head(&ndev->send_wq);
schedule_work(&ndev->init_work);
return 0;
err:
mei_nfc_free(ndev);
return ret;
}
