]>
git.ipfire.org Git - people/ms/u-boot.git/blob - board/bmw/ns16550.h
3 * originally from linux source (arch/ppc/boot/ns16550.h)
5 * have addresses as offsets from CONFIG_SYS_ISA_BASE
6 * added a few more definitions
7 * added prototypes for ns16550.c
8 * reduced no of com ports to 2
9 * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
10 * further modified to support the 8245 duart
11 * modifications (c) Paul Jimenez, Musenki, Inc. 2001.
16 unsigned char rbrthrdlb
; /* 0 */
17 unsigned char ierdmb
; /* 1 */
18 unsigned char iirfcrafr
; /* 2 */
19 unsigned char lcr
; /* 3 */
20 unsigned char mcr
; /* 4 */
21 unsigned char lsr
; /* 5 */
22 unsigned char msr
; /* 6 */
23 unsigned char scr
; /* 7 */
24 unsigned char reserved
[2]; /* 8 & 9 */
25 unsigned char dsr
; /* 10 */
26 unsigned char dcr
; /* 11 */
39 #define FCR_FIFO_EN 0x01 /*fifo enable */
40 #define FCR_RXSR 0x02 /*reciever soft reset */
41 #define FCR_TXSR 0x04 /*transmitter soft reset */
42 #define FCR_DMS 0x08 /* DMA Mode Select */
44 #define MCR_RTS 0x02 /* Readyu to Send */
45 #define MCR_LOOP 0x10 /* Local loopback mode enable */
46 /* #define MCR_DTR 0x01 noton 8245 duart */
47 /* #define MCR_DMA_EN 0x04 noton 8245 duart */
48 /* #define MCR_TX_DFR 0x08 noton 8245 duart */
50 #define LCR_WLS_MSK 0x03 /* character length slect mask */
51 #define LCR_WLS_5 0x00 /* 5 bit character length */
52 #define LCR_WLS_6 0x01 /* 6 bit character length */
53 #define LCR_WLS_7 0x02 /* 7 bit character length */
54 #define LCR_WLS_8 0x03 /* 8 bit character length */
55 #define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
56 #define LCR_PEN 0x08 /* Parity eneble */
57 #define LCR_EPS 0x10 /* Even Parity Select */
58 #define LCR_STKP 0x20 /* Stick Parity */
59 #define LCR_SBRK 0x40 /* Set Break */
60 #define LCR_BKSE 0x80 /* Bank select enable - aka DLAB on 8245 */
62 #define LSR_DR 0x01 /* Data ready */
63 #define LSR_OE 0x02 /* Overrun */
64 #define LSR_PE 0x04 /* Parity error */
65 #define LSR_FE 0x08 /* Framing error */
66 #define LSR_BI 0x10 /* Break */
67 #define LSR_THRE 0x20 /* Xmit holding register empty */
68 #define LSR_TEMT 0x40 /* Xmitter empty */
69 #define LSR_ERR 0x80 /* Error */
71 /* useful defaults for LCR*/
75 volatile struct NS16550
*NS16550_init (int chan
, int baud_divisor
);
76 void NS16550_putc (volatile struct NS16550
*com_port
, unsigned char c
);
77 unsigned char NS16550_getc (volatile struct NS16550
*com_port
);
78 int NS16550_tstc (volatile struct NS16550
*com_port
);
79 void NS16550_reinit (volatile struct NS16550
*com_port
, int baud_divisor
);