mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 03:06:16 +09:00
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>
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/*
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* COM1 NS16550 support
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* originally from linux source (arch/powerpc/boot/ns16550.c)
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* modified to use CONFIG_SYS_ISA_MEM and new defines
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*/
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#include <config.h>
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#include "ns16550.h"
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typedef struct NS16550 *NS16550_t;
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const NS16550_t COM_PORTS[] =
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{ (NS16550_t) ((CONFIG_SYS_EUMB_ADDR) + 0x4500),
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(NS16550_t) ((CONFIG_SYS_EUMB_ADDR) + 0x4600) };
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volatile struct NS16550 *NS16550_init (int chan, int baud_divisor)
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{
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volatile struct NS16550 *com_port;
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com_port = (struct NS16550 *) COM_PORTS[chan];
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com_port->ier = 0x00;
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com_port->lcr = LCR_BKSE; /* Access baud rate */
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com_port->dll = baud_divisor & 0xff; /* 9600 baud */
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com_port->dlm = (baud_divisor >> 8) & 0xff;
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com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
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com_port->mcr = MCR_RTS; /* RTS/DTR */
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com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR; /* Clear & enable FIFOs */
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return (com_port);
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}
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void NS16550_reinit (volatile struct NS16550 *com_port, int baud_divisor)
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{
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com_port->ier = 0x00;
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com_port->lcr = LCR_BKSE; /* Access baud rate */
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com_port->dll = baud_divisor & 0xff; /* 9600 baud */
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com_port->dlm = (baud_divisor >> 8) & 0xff;
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com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
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com_port->mcr = MCR_RTS; /* RTS/DTR */
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com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR; /* Clear & enable FIFOs */
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}
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void NS16550_putc (volatile struct NS16550 *com_port, unsigned char c)
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{
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while ((com_port->lsr & LSR_THRE) == 0);
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com_port->thr = c;
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}
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unsigned char NS16550_getc (volatile struct NS16550 *com_port)
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{
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while ((com_port->lsr & LSR_DR) == 0);
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return (com_port->rbr);
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}
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int NS16550_tstc (volatile struct NS16550 *com_port)
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{
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return ((com_port->lsr & LSR_DR) != 0);
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}
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