/** * mei_start - initializes host and fw to start work. * * @dev: the device structure * * returns 0 on success, <0 on failure. */ int mei_start(struct mei_device *dev) { int ret; mutex_lock(&dev->device_lock); /* acknowledge interrupt and stop interrupts */ mei_clear_interrupts(dev); mei_hw_config(dev); dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); dev->reset_count = 0; do { dev->dev_state = MEI_DEV_INITIALIZING; ret = mei_reset(dev); if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { dev_err(&dev->pdev->dev, "reset failed ret = %d", ret); goto err; } } while (ret); /* we cannot start the device w/o hbm start message completed */ if (dev->dev_state == MEI_DEV_DISABLED) { dev_err(&dev->pdev->dev, "reset failed"); goto err; } if (mei_hbm_start_wait(dev)) { dev_err(&dev->pdev->dev, "HBM haven't started"); goto err; } if (!mei_host_is_ready(dev)) { dev_err(&dev->pdev->dev, "host is not ready.\n"); goto err; } if (!mei_hw_is_ready(dev)) { dev_err(&dev->pdev->dev, "ME is not ready.\n"); goto err; } if (!mei_hbm_version_is_supported(dev)) { dev_dbg(&dev->pdev->dev, "MEI start failed.\n"); goto err; } dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); mutex_unlock(&dev->device_lock); return 0; err: dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); dev->dev_state = MEI_DEV_DISABLED; mutex_unlock(&dev->device_lock); return -ENODEV; }
/** * mei_start - initializes host and fw to start work. * * @dev: the device structure * * returns 0 on success, <0 on failure. */ int mei_start(struct mei_device *dev) { mutex_lock(&dev->device_lock); /* acknowledge interrupt and stop interupts */ mei_clear_interrupts(dev); mei_hw_config(dev); dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); mei_reset(dev, 1); if (mei_hbm_start_wait(dev)) { dev_err(&dev->pdev->dev, "HBM haven't started"); goto err; } if (!mei_host_is_ready(dev)) { dev_err(&dev->pdev->dev, "host is not ready.\n"); goto err; } if (!mei_hw_is_ready(dev)) { dev_err(&dev->pdev->dev, "ME is not ready.\n"); goto err; } if (dev->version.major_version != HBM_MAJOR_VERSION || dev->version.minor_version != HBM_MINOR_VERSION) { dev_dbg(&dev->pdev->dev, "MEI start failed.\n"); goto err; } dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); mutex_unlock(&dev->device_lock); return 0; err: dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); dev->dev_state = MEI_DEV_DISABLED; mutex_unlock(&dev->device_lock); return -ENODEV; }
/** * mei_hw_init - initializes host and fw to start work. * * @dev: the device structure * * returns 0 on success, <0 on failure. */ int mei_hw_init(struct mei_device *dev) { int ret = 0; mutex_lock(&dev->device_lock); /* acknowledge interrupt and stop interupts */ mei_clear_interrupts(dev); mei_hw_config(dev); dev->recvd_msg = false; dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); mei_reset(dev, 1); /* wait for ME to turn on ME_RDY */ if (!dev->recvd_msg) { mutex_unlock(&dev->device_lock); ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, dev->recvd_msg, mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); mutex_lock(&dev->device_lock); } if (ret <= 0 && !dev->recvd_msg) { dev->dev_state = MEI_DEV_DISABLED; dev_dbg(&dev->pdev->dev, "wait_event_interruptible_timeout failed" "on wait for ME to turn on ME_RDY.\n"); goto err; } if (!mei_host_is_ready(dev)) { dev_err(&dev->pdev->dev, "host is not ready.\n"); goto err; } if (!mei_hw_is_ready(dev)) { dev_err(&dev->pdev->dev, "ME is not ready.\n"); goto err; } if (dev->version.major_version != HBM_MAJOR_VERSION || dev->version.minor_version != HBM_MINOR_VERSION) { dev_dbg(&dev->pdev->dev, "MEI start failed.\n"); goto err; } dev->recvd_msg = false; dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); mutex_unlock(&dev->device_lock); return 0; err: dev_err(&dev->pdev->dev, "link layer initialization failed.\n"); dev->dev_state = MEI_DEV_DISABLED; mutex_unlock(&dev->device_lock); return -ENODEV; }