/* Returns the number of padding bytes for alignment. */
#define PAD_POW2(x, pow) ((((x)&((pow)-1))==0) ? 0 : (((pow)-((x)&((pow)-1)))))
-static int spi_loop;
+static bool spi_loop;
module_param(spi_loop, bool, S_IRUGO);
MODULE_PARM_DESC(spi_loop, "SPI running in loopback mode.");
debugfs_remove(cfspi->dbgfs_dir);
}
-static int dbgfs_open(struct inode *inode, struct file *file)
-{
- file->private_data = inode->i_private;
- return 0;
-}
-
static ssize_t dbgfs_state(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
"Tx data (Len: %d):\n", cfspi->tx_cpck_len);
len += print_frame((buf + len), (DEBUGFS_BUF_SIZE - len),
- cfspi->xfer.va_tx,
+ cfspi->xfer.va_tx[0],
(cfspi->tx_cpck_len + SPI_CMD_SZ), 100);
len += snprintf((buf + len), (DEBUGFS_BUF_SIZE - len),
}
static const struct file_operations dbgfs_state_fops = {
- .open = dbgfs_open,
+ .open = simple_open,
.read = dbgfs_state,
.owner = THIS_MODULE
};
static const struct file_operations dbgfs_frame_fops = {
- .open = dbgfs_open,
+ .open = simple_open,
.read = dbgfs_frame,
.owner = THIS_MODULE
};
netif_stop_queue(dev);
return 0;
}
-static const struct net_device_ops cfspi_ops = {
- .ndo_open = cfspi_open,
- .ndo_stop = cfspi_close,
- .ndo_start_xmit = cfspi_xmit
-};
-static void cfspi_setup(struct net_device *dev)
+static int cfspi_init(struct net_device *dev)
{
+ int res = 0;
struct cfspi *cfspi = netdev_priv(dev);
- dev->features = 0;
- dev->netdev_ops = &cfspi_ops;
- dev->type = ARPHRD_CAIF;
- dev->flags = IFF_NOARP | IFF_POINTOPOINT;
- dev->tx_queue_len = 0;
- dev->mtu = SPI_MAX_PAYLOAD_SIZE;
- dev->destructor = free_netdev;
- skb_queue_head_init(&cfspi->qhead);
- skb_queue_head_init(&cfspi->chead);
- cfspi->cfdev.link_select = CAIF_LINK_HIGH_BANDW;
- cfspi->cfdev.use_frag = false;
- cfspi->cfdev.use_stx = false;
- cfspi->cfdev.use_fcs = false;
- cfspi->ndev = dev;
-}
-
-int cfspi_spi_probe(struct platform_device *pdev)
-{
- struct cfspi *cfspi = NULL;
- struct net_device *ndev;
- struct cfspi_dev *dev;
- int res;
- dev = (struct cfspi_dev *)pdev->dev.platform_data;
-
- ndev = alloc_netdev(sizeof(struct cfspi),
- "cfspi%d", cfspi_setup);
- if (!ndev)
- return -ENOMEM;
-
- cfspi = netdev_priv(ndev);
- netif_stop_queue(ndev);
- cfspi->ndev = ndev;
- cfspi->pdev = pdev;
/* Set flow info. */
cfspi->flow_off_sent = 0;
cfspi->slave_talked = false;
}
- /* Assign the SPI device. */
- cfspi->dev = dev;
- /* Assign the device ifc to this SPI interface. */
- dev->ifc = &cfspi->ifc;
-
/* Allocate DMA buffers. */
- cfspi->xfer.va_tx = dma_alloc(&cfspi->xfer.pa_tx);
- if (!cfspi->xfer.va_tx) {
+ cfspi->xfer.va_tx[0] = dma_alloc(&cfspi->xfer.pa_tx[0]);
+ if (!cfspi->xfer.va_tx[0]) {
res = -ENODEV;
- goto err_dma_alloc_tx;
+ goto err_dma_alloc_tx_0;
}
cfspi->xfer.va_rx = dma_alloc(&cfspi->xfer.pa_rx);
/* Schedule the work queue. */
queue_work(cfspi->wq, &cfspi->work);
+ return 0;
+
+ err_create_wq:
+ dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);
+ err_dma_alloc_rx:
+ dma_free(cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);
+ err_dma_alloc_tx_0:
+ return res;
+}
+
+static void cfspi_uninit(struct net_device *dev)
+{
+ struct cfspi *cfspi = netdev_priv(dev);
+
+ /* Remove from list. */
+ spin_lock(&cfspi_list_lock);
+ list_del(&cfspi->list);
+ spin_unlock(&cfspi_list_lock);
+
+ cfspi->ndev = NULL;
+ /* Free DMA buffers. */
+ dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);
+ dma_free(cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);
+ set_bit(SPI_TERMINATE, &cfspi->state);
+ wake_up_interruptible(&cfspi->wait);
+ destroy_workqueue(cfspi->wq);
+ /* Destroy debugfs directory and files. */
+ dev_debugfs_rem(cfspi);
+ return;
+}
+
+static const struct net_device_ops cfspi_ops = {
+ .ndo_open = cfspi_open,
+ .ndo_stop = cfspi_close,
+ .ndo_init = cfspi_init,
+ .ndo_uninit = cfspi_uninit,
+ .ndo_start_xmit = cfspi_xmit
+};
+
+static void cfspi_setup(struct net_device *dev)
+{
+ struct cfspi *cfspi = netdev_priv(dev);
+ dev->features = 0;
+ dev->netdev_ops = &cfspi_ops;
+ dev->type = ARPHRD_CAIF;
+ dev->flags = IFF_NOARP | IFF_POINTOPOINT;
+ dev->tx_queue_len = 0;
+ dev->mtu = SPI_MAX_PAYLOAD_SIZE;
+ dev->destructor = free_netdev;
+ skb_queue_head_init(&cfspi->qhead);
+ skb_queue_head_init(&cfspi->chead);
+ cfspi->cfdev.link_select = CAIF_LINK_HIGH_BANDW;
+ cfspi->cfdev.use_frag = false;
+ cfspi->cfdev.use_stx = false;
+ cfspi->cfdev.use_fcs = false;
+ cfspi->ndev = dev;
+}
+
+int cfspi_spi_probe(struct platform_device *pdev)
+{
+ struct cfspi *cfspi = NULL;
+ struct net_device *ndev;
+ struct cfspi_dev *dev;
+ int res;
+ dev = (struct cfspi_dev *)pdev->dev.platform_data;
+
+ ndev = alloc_netdev(sizeof(struct cfspi),
+ "cfspi%d", cfspi_setup);
+ if (!dev)
+ return -ENODEV;
+
+ cfspi = netdev_priv(ndev);
+ netif_stop_queue(ndev);
+ cfspi->ndev = ndev;
+ cfspi->pdev = pdev;
+
+ /* Assign the SPI device. */
+ cfspi->dev = dev;
+ /* Assign the device ifc to this SPI interface. */
+ dev->ifc = &cfspi->ifc;
+
/* Register network device. */
res = register_netdev(ndev);
if (res) {
return res;
err_net_reg:
- dev_debugfs_rem(cfspi);
- set_bit(SPI_TERMINATE, &cfspi->state);
- wake_up_interruptible(&cfspi->wait);
- destroy_workqueue(cfspi->wq);
- err_create_wq:
- dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);
- err_dma_alloc_rx:
- dma_free(cfspi->xfer.va_tx, cfspi->xfer.pa_tx);
- err_dma_alloc_tx:
free_netdev(ndev);
return res;
int cfspi_spi_remove(struct platform_device *pdev)
{
- struct list_head *list_node;
- struct list_head *n;
- struct cfspi *cfspi = NULL;
- struct cfspi_dev *dev;
-
- dev = (struct cfspi_dev *)pdev->dev.platform_data;
- spin_lock(&cfspi_list_lock);
- list_for_each_safe(list_node, n, &cfspi_list) {
- cfspi = list_entry(list_node, struct cfspi, list);
- /* Find the corresponding device. */
- if (cfspi->dev == dev) {
- /* Remove from list. */
- list_del(list_node);
- /* Free DMA buffers. */
- dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);
- dma_free(cfspi->xfer.va_tx, cfspi->xfer.pa_tx);
- set_bit(SPI_TERMINATE, &cfspi->state);
- wake_up_interruptible(&cfspi->wait);
- destroy_workqueue(cfspi->wq);
- /* Destroy debugfs directory and files. */
- dev_debugfs_rem(cfspi);
- unregister_netdev(cfspi->ndev);
- spin_unlock(&cfspi_list_lock);
- return 0;
- }
- }
- spin_unlock(&cfspi_list_lock);
- return -ENODEV;
+ /* Everything is done in cfspi_uninit(). */
+ return 0;
}
static void __exit cfspi_exit_module(void)
list_for_each_safe(list_node, n, &cfspi_list) {
cfspi = list_entry(list_node, struct cfspi, list);
- platform_device_unregister(cfspi->pdev);
+ unregister_netdev(cfspi->ndev);
}
/* Destroy sysfs files. */
projects / karo-tx-linux.git / blobdiff