Re: HSO: add option hso driver

Paulius Zaleckas
2008-05-14T14:15:21Z

Greg Kroah-Hartman wrote:
> +#define DRIVER_VERSION "1.2"

Maybe we should bump the version?
Now it is the same as the different driver at PHARscape.

> +/* called once for each interface upon device insertion */
> +static int hso_probe(struct usb_interface *interface,
> + const struct usb_device_id *id)
> +{
> + int mux, i, if_num, port_spec;
> + unsigned char port_mask;
> + struct hso_device *hso_dev = NULL;
> + struct hso_shared_int *shared_int;
> + struct hso_device *tmp_dev = NULL;
> +
> + if_num = interface->altsetting->desc.bInterfaceNumber;
> +
> + /* Get the interface/port specification from either driver_info or from
> + * the device itself */
> + if (id->driver_info)
> + port_spec = ((u32 *)(id->driver_info))[if_num];
> + else
> + port_spec = hso_get_config_data(interface);
> +
> + if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
> + dev_err(&interface->dev, "Not our interface\n");
> + return -ENODEV;
> + }
> + /* Check if we need to switch to alt interfaces prior to port
> + * configuration */
> + if (interface->num_altsetting > 1)
> + usb_set_interface(interface_to_usbdev(interface), if_num, 1);
> + interface->needs_remote_wakeup = 1;
> +
> + /* Allocate new hso device(s) */
> + switch (port_spec & HSO_INTF_MASK) {
> + case HSO_INTF_MUX:
> + if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
> + /* Create the network device */
> + if (!disable_net) {
> + hso_dev = hso_create_net_device(interface);
> + if (!hso_dev)
> + goto exit;
> + tmp_dev = hso_dev;
> + }
> + }
> +
> + if (hso_get_mux_ports(interface, &port_mask))
> + /* TODO: de-allocate everything */
> + goto exit;
> +
> + shared_int = hso_create_shared_int(interface);
> + if (!shared_int)
> + goto exit;
> +
> + for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
> + if (port_mask & i) {
> + hso_dev = hso_create_mux_serial_device(
> + interface, i, shared_int);
> + if (!hso_dev)
> + goto exit;
> + }
> + }
> +
> + if (tmp_dev)
> + hso_dev = tmp_dev;
> + break;
> +
> + case HSO_INTF_BULK:
> + /* It's a regular bulk interface */
> + if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
> + && !disable_net)
> + hso_dev = hso_create_net_device(interface);
> + else
> + hso_dev =
> + hso_create_bulk_serial_device(interface, port_spec);
> + if (!hso_dev)
> + goto exit;
> + break;
> + default:
> + goto exit;
> + }
> +
> + usb_driver_claim_interface(&hso_driver, interface, hso_dev);

Is usb_driver_claim_interface really needed?

> + /* save our data pointer in this device */
> + usb_set_intfdata(interface, hso_dev);
> +
> + /* done */
> + return 0;
> +exit:
> + hso_free_interface(interface);
> + return -ENODEV;
> +}