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powerpc/mpc5200: Make PSC UART driver update serial errors counters

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This patch adds the capability to the mpc52xx-uart to report framing
errors, parity errors, breaks and overruns to userspace. These values
may be requested in userspace by using the ioctl TIOCGICOUNT.

Signed-off-by: René Bürgel <r.buergel@unicontrol.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
René Bürgel 2008-12-21 02:54:31 -07:00 committed by Grant Likely
parent e51f47a5c6
commit b65149880d
1 changed files with 8 additions and 2 deletions
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10
drivers/serial/mpc52xx_uart.c
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@ -752,10 +752,15 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
if (status & MPC52xx_PSC_SR_RB) {
flag = TTY_BREAK;
uart_handle_break(port);
} else if (status & MPC52xx_PSC_SR_PE)
port->icount.brk++;
} else if (status & MPC52xx_PSC_SR_PE) {
flag = TTY_PARITY;
else if (status & MPC52xx_PSC_SR_FE)
port->icount.parity++;
}
else if (status & MPC52xx_PSC_SR_FE) {
flag = TTY_FRAME;
port->icount.frame++;
}
/* Clear error condition */
out_8(&PSC(port)->command, MPC52xx_PSC_RST_ERR_STAT);
@ -769,6 +774,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
* affect the current character
*/
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
port->icount.overrun++;
}
}