mirror of
https://github.com/brain-hackers/u-boot-brain
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a47a12becf
As discussed on the list, move "arch/ppc" to "arch/powerpc" to better match the Linux directory structure. Please note that this patch also changes the "ppc" target in MAKEALL to "powerpc" to match this new infrastructure. But "ppc" is kept as an alias for now, to not break compatibility with scripts using this name. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Wolfgang Denk <wd@denx.de> Acked-by: Detlev Zundel <dzu@denx.de> Acked-by: Kim Phillips <kim.phillips@freescale.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Anatolij Gustschin <agust@denx.de>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
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* NS16550 Serial Port
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* originally from linux source (arch/powerpc/boot/ns16550.h)
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* modified slightly to
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* have addresses as offsets from CONFIG_SYS_ISA_BASE
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* added a few more definitions
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* added prototypes for ns16550.c
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* reduced no of com ports to 2
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* modifications (c) Rob Taylor, Flying Pig Systems. 2000.
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*
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* further modified to support the DUART in the Galileo eval board
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* modifications (c) Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
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*/
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#ifndef __NS16550_H__
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#define __NS16550_H__
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/* the padding is necessary because on the galileo board the UART is
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wired in with the 3 address lines shifted over by 2 bits */
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struct NS16550
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{
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unsigned char rbr; /* 0 = 0-3*/
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int pad1:24;
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unsigned char ier; /* 1 = 4-7*/
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int pad2:24;
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unsigned char fcr; /* 2 = 8-b*/
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int pad3:24;
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unsigned char lcr; /* 3 = c-f*/
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int pad4:24;
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unsigned char mcr; /* 4 = 10-13*/
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int pad5:24;
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unsigned char lsr; /* 5 = 14-17*/
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int pad6:24;
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unsigned char msr; /* 6 =18-1b*/
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int pad7:24;
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unsigned char scr; /* 7 =1c-1f*/
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int pad8:24;
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} __attribute__ ((packed));
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/* aliases */
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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#define FCR_FIFO_EN 0x01 /*fifo enable*/
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#define FCR_RXSR 0x02 /*reciever soft reset*/
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#define FCR_TXSR 0x04 /*transmitter soft reset*/
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#define MCR_DTR 0x01
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#define MCR_RTS 0x02
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#define MCR_DMA_EN 0x04
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#define MCR_TX_DFR 0x08
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#define LCR_WLS_MSK 0x03 /* character length slect mask*/
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#define LCR_WLS_5 0x00 /* 5 bit character length */
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#define LCR_WLS_6 0x01 /* 6 bit character length */
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#define LCR_WLS_7 0x02 /* 7 bit character length */
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#define LCR_WLS_8 0x03 /* 8 bit character length */
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#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
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#define LCR_PEN 0x08 /* Parity eneble*/
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#define LCR_EPS 0x10 /* Even Parity Select*/
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#define LCR_STKP 0x20 /* Stick Parity*/
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#define LCR_SBRK 0x40 /* Set Break*/
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#define LCR_BKSE 0x80 /* Bank select enable*/
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#define LSR_DR 0x01 /* Data ready */
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#define LSR_OE 0x02 /* Overrun */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_FE 0x08 /* Framing error */
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#define LSR_BI 0x10 /* Break */
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#define LSR_THRE 0x20 /* Xmit holding register empty */
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#define LSR_TEMT 0x40 /* Xmitter empty */
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#define LSR_ERR 0x80 /* Error */
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/* useful defaults for LCR*/
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#define LCR_8N1 0x03
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#define COM1 0x03F8
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#define COM2 0x02F8
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volatile struct NS16550 * NS16550_init(int chan, int baud_divisor);
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void NS16550_putc(volatile struct NS16550 *com_port, unsigned char c);
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unsigned char NS16550_getc(volatile struct NS16550 *com_port);
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int NS16550_tstc(volatile struct NS16550 *com_port);
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void NS16550_reinit(volatile struct NS16550 *com_port, int baud_divisor);
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typedef struct NS16550 *NS16550_t;
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extern const NS16550_t COM_PORTS[];
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#endif
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