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Commit | Line | Data |
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e85390dc WD |
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 |
e85390dc WD |
5 | */ |
6 | ||
7 | #include <config.h> | |
8 | ||
6d0f6bcf | 9 | #ifdef CONFIG_SYS_NS16550 |
e85390dc WD |
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 | ||
17 | void 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; |
7ec8bb15 WD |
24 | com_port->dll = 0; |
25 | com_port->dlm = 0; | |
e85390dc WD |
26 | com_port->lcr = LCRVAL; |
27 | com_port->mcr = MCRVAL; | |
28 | com_port->fcr = FCRVAL; | |
7ec8bb15 WD |
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; | |
8ed96046 WD |
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 |
e85390dc WD |
40 | } |
41 | ||
42 | void NS16550_reinit (NS16550_t com_port, int baud_divisor) | |
43 | { | |
44 | com_port->ier = 0x00; | |
7ec8bb15 WD |
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; | |
e85390dc WD |
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; | |
e85390dc WD |
55 | } |
56 | ||
57 | void NS16550_putc (NS16550_t com_port, char c) | |
58 | { | |
59 | while ((com_port->lsr & LSR_THRE) == 0); | |
60 | com_port->thr = c; | |
61 | } | |
62 | ||
63 | char NS16550_getc (NS16550_t com_port) | |
64 | { | |
232c150a WD |
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 | } | |
e85390dc WD |
71 | return (com_port->rbr); |
72 | } | |
73 | ||
74 | int NS16550_tstc (NS16550_t com_port) | |
75 | { | |
76 | return ((com_port->lsr & LSR_DR) != 0); | |
77 | } | |
78 | ||
79 | #endif |