diff options
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 128c20a043c..2353679f601 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -273,12 +273,18 @@ static __u16 product; /* struct ftdi_sio_quirk is used by devices requiring special attention. */ struct ftdi_sio_quirk { + int (*probe)(struct usb_serial *); void (*setup)(struct usb_serial *); /* Special settings during startup. */ }; +static int ftdi_olimex_probe (struct usb_serial *serial); static void ftdi_USB_UIRT_setup (struct usb_serial *serial); static void ftdi_HE_TIRA1_setup (struct usb_serial *serial); +static struct ftdi_sio_quirk ftdi_olimex_quirk = { + .probe = ftdi_olimex_probe, +}; + static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = { .setup = ftdi_USB_UIRT_setup, }; @@ -527,6 +533,8 @@ static struct usb_device_id id_table_combined [] = { { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) }, { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) }, + { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID), + .driver_info = (kernel_ulong_t)&ftdi_olimex_quirk }, { }, /* Optional parameter entry */ { } /* Terminating entry */ }; @@ -671,7 +679,7 @@ static struct usb_serial_driver ftdi_sio_device = { /* * *************************************************************************** - * Utlity functions + * Utility functions * *************************************************************************** */ @@ -1173,9 +1181,17 @@ static void remove_sysfs_attrs(struct usb_serial_port *port) /* Probe function to check for special devices */ static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) { + struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info; + + if (quirk && quirk->probe) { + int ret = quirk->probe(serial); + if (ret != 0) + return ret; + } + usb_set_serial_data(serial, (void *)id->driver_info); - return (0); + return 0; } static int ftdi_sio_port_probe(struct usb_serial_port *port) @@ -1270,6 +1286,24 @@ static void ftdi_HE_TIRA1_setup (struct usb_serial *serial) priv->force_rtscts = 1; } /* ftdi_HE_TIRA1_setup */ +/* + * First port on Olimex arm-usb-ocd is reserved for JTAG interface + * and can be accessed from userspace using openocd. + */ +static int ftdi_olimex_probe(struct usb_serial *serial) +{ + struct usb_device *udev = serial->dev; + struct usb_interface *interface = serial->interface; + + dbg("%s",__FUNCTION__); + + if (interface == udev->actconfig->interface[0]) { + info("Ignoring reserved serial port on Olimex arm-usb-ocd\n"); + return -ENODEV; + } + + return 0; +} /* ftdi_shutdown is called from usbserial:usb_serial_disconnect * it is called when the usb device is disconnected |