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author | wdenk <wdenk> | 2004-01-03 00:43:19 +0000 |
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committer | wdenk <wdenk> | 2004-01-03 00:43:19 +0000 |
commit | 3a473b2a6523db9cdf2b5aed22d9730b4ebc5693 (patch) | |
tree | 40da84736871e773141ea971d832bf0c908d59b7 /board/Marvell/common/ns16550.h | |
parent | b6e4c4033c4f889c452c511d38c77808c67f9cf7 (diff) | |
download | u-boot-imx-3a473b2a6523db9cdf2b5aed22d9730b4ebc5693.zip u-boot-imx-3a473b2a6523db9cdf2b5aed22d9730b4ebc5693.tar.gz u-boot-imx-3a473b2a6523db9cdf2b5aed22d9730b4ebc5693.tar.bz2 |
* Patch by Ronen Shitrit, 10 Dec 2003:
Add support for the Marvell DB64360 / DB64460 development boards
* Patch by Detlev Zundel, 10 Dec 2003:
fix dependency problem in examples/Makefile
Diffstat (limited to 'board/Marvell/common/ns16550.h')
-rw-r--r-- | board/Marvell/common/ns16550.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/board/Marvell/common/ns16550.h b/board/Marvell/common/ns16550.h new file mode 100644 index 0000000..f2ed2ab --- /dev/null +++ b/board/Marvell/common/ns16550.h @@ -0,0 +1,102 @@ +/* + * NS16550 Serial Port + * originally from linux source (arch/ppc/boot/ns16550.h) + * modified slightly to + * have addresses as offsets from CFG_ISA_BASE + * added a few more definitions + * added prototypes for ns16550.c + * reduced no of com ports to 2 + * modifications (c) Rob Taylor, Flying Pig Systems. 2000. + * + * further modified to support the DUART in the Galileo eval board + * modifications (c) Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. + */ + +#ifndef __NS16550_H__ +#define __NS16550_H__ + +/* the padding is necessary because on the galileo board the UART is + wired in with the 3 address lines shifted over by 2 bits */ +struct NS16550 +{ + unsigned char rbr; /* 0 = 0-3*/ + int pad1:24; + + unsigned char ier; /* 1 = 4-7*/ + int pad2:24; + + unsigned char fcr; /* 2 = 8-b*/ + int pad3:24; + + unsigned char lcr; /* 3 = c-f*/ + int pad4:24; + + unsigned char mcr; /* 4 = 10-13*/ + int pad5:24; + + unsigned char lsr; /* 5 = 14-17*/ + int pad6:24; + + unsigned char msr; /* 6 =18-1b*/ + int pad7:24; + + unsigned char scr; /* 7 =1c-1f*/ + int pad8:24; +} __attribute__ ((packed)); + +/* aliases */ +#define thr rbr +#define iir fcr +#define dll rbr +#define dlm ier + +#define FCR_FIFO_EN 0x01 /*fifo enable*/ +#define FCR_RXSR 0x02 /*reciever soft reset*/ +#define FCR_TXSR 0x04 /*transmitter soft reset*/ + + +#define MCR_DTR 0x01 +#define MCR_RTS 0x02 +#define MCR_DMA_EN 0x04 +#define MCR_TX_DFR 0x08 + + +#define LCR_WLS_MSK 0x03 /* character length slect mask*/ +#define LCR_WLS_5 0x00 /* 5 bit character length */ +#define LCR_WLS_6 0x01 /* 6 bit character length */ +#define LCR_WLS_7 0x02 /* 7 bit character length */ +#define LCR_WLS_8 0x03 /* 8 bit character length */ +#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */ +#define LCR_PEN 0x08 /* Parity eneble*/ +#define LCR_EPS 0x10 /* Even Parity Select*/ +#define LCR_STKP 0x20 /* Stick Parity*/ +#define LCR_SBRK 0x40 /* Set Break*/ +#define LCR_BKSE 0x80 /* Bank select enable*/ + +#define LSR_DR 0x01 /* Data ready */ +#define LSR_OE 0x02 /* Overrun */ +#define LSR_PE 0x04 /* Parity error */ +#define LSR_FE 0x08 /* Framing error */ +#define LSR_BI 0x10 /* Break */ +#define LSR_THRE 0x20 /* Xmit holding register empty */ +#define LSR_TEMT 0x40 /* Xmitter empty */ +#define LSR_ERR 0x80 /* Error */ + +/* useful defaults for LCR*/ +#define LCR_8N1 0x03 + + +#define COM1 0x03F8 +#define COM2 0x02F8 + +volatile struct NS16550 * NS16550_init(int chan, int baud_divisor); +void NS16550_putc(volatile struct NS16550 *com_port, unsigned char c); +unsigned char NS16550_getc(volatile struct NS16550 *com_port); +int NS16550_tstc(volatile struct NS16550 *com_port); +void NS16550_reinit(volatile struct NS16550 *com_port, int baud_divisor); + +typedef struct NS16550 *NS16550_t; + +extern const NS16550_t COM_PORTS[]; + +#endif |