diff options
Diffstat (limited to 'drivers/serial/8250.c')
| -rw-r--r-- | drivers/serial/8250.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 0d9358608fd..30e8beb7143 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -682,8 +682,6 @@ static void autoconfig_16550a(struct uart_8250_port *up) * from EXCR1. Switch back to bank 0, change it in MCR. Then * switch back to bank 2, read it from EXCR1 again and check * it's changed. If so, set baud_base in EXCR2 to 921600. -- dwmw2 - * On PowerPC we don't want to change baud_base, as we have - * a number of different divisors. -- Tom Rini */ serial_outp(up, UART_LCR, 0); status1 = serial_in(up, UART_MCR); @@ -699,16 +697,25 @@ static void autoconfig_16550a(struct uart_8250_port *up) serial_outp(up, UART_MCR, status1); if ((status2 ^ status1) & UART_MCR_LOOP) { -#ifndef CONFIG_PPC + unsigned short quot; + serial_outp(up, UART_LCR, 0xE0); + + quot = serial_inp(up, UART_DLM) << 8; + quot += serial_inp(up, UART_DLL); + quot <<= 3; + status1 = serial_in(up, 0x04); /* EXCR1 */ status1 &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ status1 |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ serial_outp(up, 0x04, status1); + + serial_outp(up, UART_DLL, quot & 0xff); + serial_outp(up, UART_DLM, quot >> 8); + serial_outp(up, UART_LCR, 0); - up->port.uartclk = 921600*16; -#endif + up->port.uartclk = 921600*16; up->port.type = PORT_NS16550A; up->capabilities |= UART_NATSEMI; return; @@ -1122,18 +1129,9 @@ receive_chars(struct uart_8250_port *up, int *status, struct pt_regs *regs) } if (uart_handle_sysrq_char(&up->port, ch, regs)) goto ignore_char; - if ((lsr & up->port.ignore_status_mask) == 0) { - tty_insert_flip_char(tty, ch, flag); - } - if ((lsr & UART_LSR_OE) && - tty->flip.count < TTY_FLIPBUF_SIZE) { - /* - * Overrun is special, since it's reported - * immediately, and doesn't affect the current - * character. - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } + + uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag); + ignore_char: lsr = serial_inp(up, UART_LSR); } while ((lsr & UART_LSR_DR) && (max_count-- > 0)); |