]>
git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/serial/ns16550.c
3 * originally from linux source (arch/ppc/boot/ns16550.c)
4 * modified to use CONFIG_SYS_ISA_MEM and new defines
11 #define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
12 #define UART_MCRVAL (UART_MCR_DTR | \
13 UART_MCR_RTS) /* RTS/DTR */
14 #define UART_FCRVAL (UART_FCR_FIFO_EN | \
16 UART_FCR_TXSR) /* Clear & enable FIFOs */
18 void NS16550_init (NS16550_t com_port
, int baud_divisor
)
21 #if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)
22 com_port
->mdr1
= 0x7; /* mode select reset TL16C750*/
24 com_port
->lcr
= UART_LCR_BKSE
| UART_LCRVAL
;
27 com_port
->lcr
= UART_LCRVAL
;
28 com_port
->mcr
= UART_MCRVAL
;
29 com_port
->fcr
= UART_FCRVAL
;
30 com_port
->lcr
= UART_LCR_BKSE
| UART_LCRVAL
;
31 com_port
->dll
= baud_divisor
& 0xff;
32 com_port
->dlm
= (baud_divisor
>> 8) & 0xff;
33 com_port
->lcr
= UART_LCRVAL
;
34 #if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)
35 #if defined(CONFIG_APTIX)
36 com_port
->mdr1
= 3; /* /13 mode so Aptix 6MHz can hit 115200 */
38 com_port
->mdr1
= 0; /* /16 is proper to hit 115200 with 48MHz */
40 #endif /* CONFIG_OMAP */
43 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
44 void NS16550_reinit (NS16550_t com_port
, int baud_divisor
)
47 com_port
->lcr
= UART_LCR_BKSE
| UART_LCRVAL
;
50 com_port
->lcr
= UART_LCRVAL
;
51 com_port
->mcr
= UART_MCRVAL
;
52 com_port
->fcr
= UART_FCRVAL
;
53 com_port
->lcr
= UART_LCR_BKSE
;
54 com_port
->dll
= baud_divisor
& 0xff;
55 com_port
->dlm
= (baud_divisor
>> 8) & 0xff;
56 com_port
->lcr
= UART_LCRVAL
;
58 #endif /* CONFIG_NS16550_MIN_FUNCTIONS */
60 void NS16550_putc (NS16550_t com_port
, char c
)
62 while ((com_port
->lsr
& UART_LSR_THRE
) == 0);
66 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
67 char NS16550_getc (NS16550_t com_port
)
69 while ((com_port
->lsr
& UART_LSR_DR
) == 0) {
71 extern void usbtty_poll(void);
76 return (com_port
->rbr
);
79 int NS16550_tstc (NS16550_t com_port
)
81 return ((com_port
->lsr
& UART_LSR_DR
) != 0);
84 #endif /* CONFIG_NS16550_MIN_FUNCTIONS */