Add parametrs to hide some of converter interfaces against ftdi_sio driver.
This allows on multiple-interfaces converter (such as ft2232, ft4232)
use uart with kernel driver and use e.g. I2C or SPI (on other interface)
with libusb or other kernel-driver.
Signed-off-by: Robert Ryszard Paciorek <R.Paciorek@xxxxxxxxxx>
---
--- drivers/usb/serial/ftdi_sio.c.org 2012-09-12 10:51:44.779427134 +0000
+++ drivers/usb/serial/ftdi_sio.c 2012-09-12 13:54:40.210930196 +0000
@@ -1633,10 +1633,19 @@ static void remove_sysfs_attrs(struct us
* ***************************************************************************
*/
+/* Module parameter to control ignoring some interfaces on multiple
+ interfaces converter such as ft2232, ft4232:
+ ignore_mask - bit mask of ignoring interfaces
+ ignore_only_on_dev - product name of device with ignore interfaces
+*/
+unsigned short ignore_mask;
+char *ignore_only_on_dev;
+
/* Probe function to check for special devices */
static int ftdi_sio_probe(struct usb_serial *serial,
const struct usb_device_id *id)
{
+ int i;
struct ftdi_sio_quirk *quirk =
(struct ftdi_sio_quirk *)id->driver_info;
@@ -1646,6 +1655,21 @@ static int ftdi_sio_probe(struct usb_ser
return ret;
}
+ if (ignore_mask != 0x00 && (ignore_only_on_dev == NULL
+ || strcmp(serial->dev->product, ignore_only_on_dev) == 0)) {
+ struct usb_interface *interface = serial->interface;
+ struct usb_host_config *actconfig = serial->dev->actconfig;
+
+ for (i = 0; i < 8 && i < USB_MAXINTERFACES; i++) {
+ if ((ignore_mask>>i) & 0x01
+ && interface == actconfig->interface[i]) {
+ dev_info(&serial->dev->dev,
+ "Ignoring interface %d\n", i);
+ return -ENODEV;
+ }
+ }
+ }
+
usb_set_serial_data(serial, (void *)id->driver_info);
return 0;
@@ -2440,3 +2464,8 @@ MODULE_PARM_DESC(product, "User specifie
module_param(ndi_latency_timer, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ndi_latency_timer, "NDI device latency timer override");
+
+module_param(ignore_mask, ushort, 0);
+MODULE_PARM_DESC(ignore_mask, "Bit mask of ignoring interfaces (default=0x0000) (ushort)");
+module_param(ignore_only_on_dev, charp, 0);
+MODULE_PARM_DESC(ignore_only_on_dev, "USB product name of device where we ignore interfaces (default NULL == all devices) (string)");
--
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