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Support variable speed

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Vladimir 'phcoder' Serbinenko 2010-07-18 15:00:50 +02:00
parent 1da07b142b
commit 91d135a12c
2 changed files with 9 additions and 2 deletions
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2
term/ns8250.c
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@ -61,7 +61,7 @@ serial_get_divisor (unsigned int speed)
}; };
/* Set the baud rate. */ /* Set the baud rate. */
for (i = 0; i < sizeof (divisor_tab) / sizeof (divisor_tab[0]); i++) for (i = 0; i < ARRAY_SIZE (divisor_tab); i++)
if (divisor_tab[i].speed == speed) if (divisor_tab[i].speed == speed)
/* UART in Yeeloong runs twice the usual rate. */ /* UART in Yeeloong runs twice the usual rate. */
#ifdef GRUB_MACHINE_MIPS_YEELOONG #ifdef GRUB_MACHINE_MIPS_YEELOONG

9
term/usbserial.c
View file

@ -48,13 +48,20 @@ get_divisor (unsigned int speed)
}; };
/* The table which lists common configurations. */ /* The table which lists common configurations. */
/* Computed with a division formula with 3MHz as base frequency. */
static struct divisor divisor_tab[] = static struct divisor divisor_tab[] =
{ {
{ 2400, 0x04e2 },
{ 4800, 0x0271 },
{ 9600, 0x4138 }, { 9600, 0x4138 },
{ 19200, 0x809c },
{ 38400, 0xc04e },
{ 57600, 0xc034 },
{ 115200, 0x001a }
}; };
/* Set the baud rate. */ /* Set the baud rate. */
for (i = 0; i < sizeof (divisor_tab) / sizeof (divisor_tab[0]); i++) for (i = 0; i < ARRAY_SIZE (divisor_tab); i++)
if (divisor_tab[i].speed == speed) if (divisor_tab[i].speed == speed)
return divisor_tab[i].div; return divisor_tab[i].div;
return 0; return 0;