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| author | Kees Schoenmakers <k.schoenmakers@sigmae.nl> | 2009-09-19 13:13:18 -0700 |
|---|---|---|
| committer | Live-CD User <linux@linux.site> | 2009-09-19 13:13:18 -0700 |
| commit | 2f9ea55c98bd03265e1c3eb114718eb2974df4cb (patch) | |
| tree | db669b2ad9617b332749b7e5d0598fe47f60e8d1 /drivers/usb/serial/mos7720.c | |
| parent | 0f608f8926968b4beee2cb00ef05522ad84f36eb (diff) | |
| download | linux-2f9ea55c98bd03265e1c3eb114718eb2974df4cb.tar.gz linux-2f9ea55c98bd03265e1c3eb114718eb2974df4cb.tar.bz2 linux-2f9ea55c98bd03265e1c3eb114718eb2974df4cb.zip | |
tty: usb_serial_mos7720: Fix get_lsr_info
I made a correction for get_lsr_info, now it returns some meaningful
information. I tested it with two simultaneous simplex modem channels.
it is attached
Signed-off-by: Kees Schoenmakers <k.schoenmakers@sigmae.nl>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/mos7720.c')
| -rw-r--r-- | drivers/usb/serial/mos7720.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index 759cdd5ae74d..4342a8a0eac9 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -378,10 +378,14 @@ static int mos7720_open(struct tty_struct *tty, /* Initialize MCS7720 -- Write Init values to corresponding Registers * * Register Index + * 0 : THR/RHR * 1 : IER * 2 : FCR * 3 : LCR * 4 : MCR + * 5 : LSR + * 6 : MSR + * 7 : SPR * * 0x08 : SP1/2 Control Reg */ @@ -1250,15 +1254,22 @@ static void mos7720_set_termios(struct tty_struct *tty, static int get_lsr_info(struct tty_struct *tty, struct moschip_port *mos7720_port, unsigned int __user *value) { - int count; + struct usb_serial_port *port = tty->driver_data; unsigned int result = 0; + unsigned char data = 0; + int port_number = port->number - port->serial->minor; + int count; count = mos7720_chars_in_buffer(tty); if (count == 0) { - dbg("%s -- Empty", __func__); - result = TIOCSER_TEMT; + send_mos_cmd(port->serial, MOS_READ, port_number, + UART_LSR, &data); + if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) + == (UART_LSR_TEMT | UART_LSR_THRE)) { + dbg("%s -- Empty", __func__); + result = TIOCSER_TEMT; + } } - if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; |