diff options
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 76f8b355667..a2668d08926 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -75,6 +75,7 @@ struct ftdi_private { unsigned long last_dtr_rts; /* saved modem control outputs */ wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ char prev_status, diff_status; /* Used for TIOCMIWAIT */ + char transmit_empty; /* If transmitter is empty or not */ struct usb_serial_port *port; __u16 interface; /* FT2232C, FT2232H or FT4232H port interface (0 for FT232/245) */ @@ -201,6 +202,7 @@ static struct usb_device_id id_table_combined [] = { { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) }, { USB_DEVICE(FTDI_VID, FTDI_R2000KU_TRUE_RNG) }, + { USB_DEVICE(FTDI_VID, FTDI_VARDAAN_PID) }, { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0100_PID) }, { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0101_PID) }, { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0102_PID) }, @@ -696,6 +698,7 @@ static struct usb_device_id id_table_combined [] = { .driver_info = (kernel_ulong_t)&ftdi_NDI_device_quirk }, { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) }, { USB_DEVICE(RTSYSTEMS_VID, RTSYSTEMS_SERIAL_VX7_PID) }, + { USB_DEVICE(RTSYSTEMS_VID, RTSYSTEMS_CT29B_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) }, { USB_DEVICE(FTDI_VID, FTDI_PHI_FISCO_PID) }, { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) }, @@ -794,6 +797,7 @@ static struct usb_device_id id_table_combined [] = { { USB_DEVICE(FTDI_VID, FTDI_SCIENCESCOPE_LOGBOOKML_PID) }, { USB_DEVICE(FTDI_VID, FTDI_SCIENCESCOPE_LS_LOGBOOK_PID) }, { USB_DEVICE(FTDI_VID, FTDI_SCIENCESCOPE_HS_LOGBOOK_PID) }, + { USB_DEVICE(FTDI_VID, FTDI_DOTEC_PID) }, { USB_DEVICE(QIHARDWARE_VID, MILKYMISTONE_JTAGSERIAL_PID), .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk }, { }, /* Optional parameter entry */ @@ -1320,6 +1324,23 @@ check_and_exit: return 0; } +static int get_lsr_info(struct usb_serial_port *port, + struct serial_struct __user *retinfo) +{ + struct ftdi_private *priv = usb_get_serial_port_data(port); + unsigned int result = 0; + + if (!retinfo) + return -EFAULT; + + if (priv->transmit_empty) + result = TIOCSER_TEMT; + + if (copy_to_user(retinfo, &result, sizeof(unsigned int))) + return -EFAULT; + return 0; +} + /* Determine type of FTDI chip based on USB config and descriptor. */ static void ftdi_determine_type(struct usb_serial_port *port) @@ -1869,6 +1890,12 @@ static int ftdi_process_packet(struct tty_struct *tty, tty_insert_flip_char(tty, 0, TTY_OVERRUN); } + /* save if the transmitter is empty or not */ + if (packet[1] & FTDI_RS_TEMT) + priv->transmit_empty = 1; + else + priv->transmit_empty = 0; + len -= 2; if (!len) return 0; /* status only */ @@ -2232,6 +2259,9 @@ static int ftdi_ioctl(struct tty_struct *tty, struct file *file, } } return 0; + case TIOCSERGETLSR: + return get_lsr_info(port, (struct serial_struct __user *)arg); + break; default: break; } |