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| author | wdenk <wdenk> | 2004-01-03 00:43:19 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2004-01-03 00:43:19 +0000 |
| commit | 3a473b2a6523db9cdf2b5aed22d9730b4ebc5693 (patch) | |
| tree | 40da84736871e773141ea971d832bf0c908d59b7 /board/Marvell/common/ns16550.c | |
| 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.c')
| -rw-r--r-- | board/Marvell/common/ns16550.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/board/Marvell/common/ns16550.c b/board/Marvell/common/ns16550.c new file mode 100644 index 0000000..475445b --- /dev/null +++ b/board/Marvell/common/ns16550.c @@ -0,0 +1,66 @@ +/* + * COM1 NS16550 support + * originally from linux source (arch/ppc/boot/ns16550.c) + * modified to use CFG_ISA_MEM and new defines + * + * further modified by Josh Huber <huber@mclx.com> to support + * the DUART on the Galileo Eval board. (db64360) + */ + +#include <config.h> +#include "ns16550.h" + +#ifdef ZUMA_NTL +/* no 16550 device */ +#else +const NS16550_t COM_PORTS[] = { (NS16550_t) (CFG_DUART_IO + 0), + (NS16550_t) (CFG_DUART_IO + 0x20) +}; + +volatile struct NS16550 *NS16550_init (int chan, int baud_divisor) +{ + volatile struct NS16550 *com_port; + + com_port = (struct NS16550 *) COM_PORTS[chan]; + com_port->ier = 0x00; + com_port->lcr = LCR_BKSE; /* Access baud rate */ + com_port->dll = baud_divisor & 0xff; /* 9600 baud */ + com_port->dlm = (baud_divisor >> 8) & 0xff; + com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */ + com_port->mcr = MCR_DTR | MCR_RTS; /* RTS/DTR */ + + /* Clear & enable FIFOs */ + com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR; + return (com_port); +} + +void NS16550_reinit (volatile struct NS16550 *com_port, int baud_divisor) +{ + com_port->ier = 0x00; + com_port->lcr = LCR_BKSE; /* Access baud rate */ + com_port->dll = baud_divisor & 0xff; /* 9600 baud */ + com_port->dlm = (baud_divisor >> 8) & 0xff; + com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */ + com_port->mcr = MCR_DTR | MCR_RTS; /* RTS/DTR */ + + /* Clear & enable FIFOs */ + com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR; +} + +void NS16550_putc (volatile struct NS16550 *com_port, unsigned char c) +{ + while ((com_port->lsr & LSR_THRE) == 0); + com_port->thr = c; +} + +unsigned char NS16550_getc (volatile struct NS16550 *com_port) +{ + while ((com_port->lsr & LSR_DR) == 0); + return (com_port->rbr); +} + +int NS16550_tstc (volatile struct NS16550 *com_port) +{ + return ((com_port->lsr & LSR_DR) != 0); +} +#endif |