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Don't double the divisor on Geode UART, it runs at normal speed

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Vladimir 'phcoder' Serbinenko 2011-01-18 14:00:55 +01:00
parent 01b08a0f15
commit edf9d1f7eb
1 changed files with 12 additions and 8 deletions
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20
grub-core/term/ns8250.c
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@ -37,7 +37,8 @@ static const grub_port_t serial_hw_io_addr[] = GRUB_MACHINE_SERIAL_PORTS;
/* Convert speed to divisor. */
static unsigned short
serial_get_divisor (unsigned int speed)
serial_get_divisor (const struct grub_serial_port *port,
const struct grub_serial_config *config)
{
unsigned int i;
@ -63,13 +64,16 @@ serial_get_divisor (unsigned int speed)
/* Set the baud rate. */
for (i = 0; i < ARRAY_SIZE (divisor_tab); i++)
if (divisor_tab[i].speed == speed)
/* UART in Yeeloong runs twice the usual rate. */
if (divisor_tab[i].speed == config->speed)
{
/* internal UART in Yeeloong runs twice the usual rate. */
#ifdef GRUB_MACHINE_MIPS_YEELOONG
return 2 * divisor_tab[i].div;
#else
return divisor_tab[i].div;
if (port->port == 0xbff003f8)
return 2 * divisor_tab[i].div;
else
#endif
return divisor_tab[i].div;
}
return 0;
}
@ -93,7 +97,7 @@ do_real_config (struct grub_serial_port *port)
port->broken = 0;
divisor = serial_get_divisor (port->config.speed);
divisor = serial_get_divisor (port, &port->config);
/* Turn off the interrupt. */
grub_outb (0, port->port + UART_IER);
@ -188,7 +192,7 @@ serial_hw_configure (struct grub_serial_port *port,
{
unsigned short divisor;
divisor = serial_get_divisor (config->speed);
divisor = serial_get_divisor (port, config);
if (divisor == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "bad speed");