]> git.ipfire.org Git - people/ms/u-boot.git/blame - drivers/serial/ns16550.c
rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / drivers / serial / ns16550.c
CommitLineData
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1/*
2 * COM1 NS16550 support
3 * originally from linux source (arch/ppc/boot/ns16550.c)
6d0f6bcf 4 * modified to use CONFIG_SYS_ISA_MEM and new defines
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5 */
6
7#include <config.h>
8
6d0f6bcf 9#ifdef CONFIG_SYS_NS16550
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10
11#include <ns16550.h>
12
13#define LCRVAL LCR_8N1 /* 8 data, 1 stop, no parity */
14#define MCRVAL (MCR_DTR | MCR_RTS) /* RTS/DTR */
15#define FCRVAL (FCR_FIFO_EN | FCR_RXSR | FCR_TXSR) /* Clear & enable FIFOs */
16
17void NS16550_init (NS16550_t com_port, int baud_divisor)
18{
19 com_port->ier = 0x00;
8ed96046 20#ifdef CONFIG_OMAP
232c150a 21 com_port->mdr1 = 0x7; /* mode select reset TL16C750*/
945af8d7 22#endif
e85390dc 23 com_port->lcr = LCR_BKSE | LCRVAL;
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24 com_port->dll = 0;
25 com_port->dlm = 0;
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26 com_port->lcr = LCRVAL;
27 com_port->mcr = MCRVAL;
28 com_port->fcr = FCRVAL;
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29 com_port->lcr = LCR_BKSE | LCRVAL;
30 com_port->dll = baud_divisor & 0xff;
31 com_port->dlm = (baud_divisor >> 8) & 0xff;
32 com_port->lcr = LCRVAL;
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33#if defined(CONFIG_OMAP)
34#if defined(CONFIG_APTIX)
35 com_port->mdr1 = 3; /* /13 mode so Aptix 6MHz can hit 115200 */
36#else
37 com_port->mdr1 = 0; /* /16 is proper to hit 115200 with 48MHz */
38#endif
2e5983d2 39#endif
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40}
41
42void NS16550_reinit (NS16550_t com_port, int baud_divisor)
43{
44 com_port->ier = 0x00;
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45 com_port->lcr = LCR_BKSE | LCRVAL;
46 com_port->dll = 0;
47 com_port->dlm = 0;
48 com_port->lcr = LCRVAL;
49 com_port->mcr = MCRVAL;
50 com_port->fcr = FCRVAL;
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51 com_port->lcr = LCR_BKSE;
52 com_port->dll = baud_divisor & 0xff;
53 com_port->dlm = (baud_divisor >> 8) & 0xff;
54 com_port->lcr = LCRVAL;
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55}
56
57void NS16550_putc (NS16550_t com_port, char c)
58{
59 while ((com_port->lsr & LSR_THRE) == 0);
60 com_port->thr = c;
61}
62
63char NS16550_getc (NS16550_t com_port)
64{
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65 while ((com_port->lsr & LSR_DR) == 0) {
66#ifdef CONFIG_USB_TTY
67 extern void usbtty_poll(void);
68 usbtty_poll();
69#endif
70 }
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71 return (com_port->rbr);
72}
73
74int NS16550_tstc (NS16550_t com_port)
75{
76 return ((com_port->lsr & LSR_DR) != 0);
77}
78
79#endif