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author | H. Nikolaus Schaller <hns@goldelico.com> | 2011-01-11 17:31:17 +0100 |
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committer | H. Nikolaus Schaller <hns@goldelico.com> | 2011-01-11 17:31:17 +0100 |
commit | e1bbb64ec2ca8ddf1dec91ae1e08ef96ee53639a (patch) | |
tree | a1da223c1cfb33cf32d3a12347dda0c25babd93d /uart-monitor/drivers/ns16550.c | |
parent | 6494108fdc54f2bb285b3c4078d8965e89efaf95 (diff) | |
download | bootable_bootloader_goldelico_gta04_x-loader-e1bbb64ec2ca8ddf1dec91ae1e08ef96ee53639a.zip bootable_bootloader_goldelico_gta04_x-loader-e1bbb64ec2ca8ddf1dec91ae1e08ef96ee53639a.tar.gz bootable_bootloader_goldelico_gta04_x-loader-e1bbb64ec2ca8ddf1dec91ae1e08ef96ee53639a.tar.bz2 |
fixed issue with submodules
Diffstat (limited to 'uart-monitor/drivers/ns16550.c')
m--------- | uart-monitor | 0 | ||||
-rw-r--r-- | uart-monitor/drivers/ns16550.c | 69 |
2 files changed, 69 insertions, 0 deletions
diff --git a/uart-monitor b/uart-monitor deleted file mode 160000 -Subproject eb8b047c29a2027fbdd841cd1289fa27ddb22d7 diff --git a/uart-monitor/drivers/ns16550.c b/uart-monitor/drivers/ns16550.c new file mode 100644 index 0000000..b5a5c12 --- /dev/null +++ b/uart-monitor/drivers/ns16550.c @@ -0,0 +1,69 @@ +/* + * This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + * + * COM1 NS16550 support + * originally from linux source (arch/ppc/boot/ns16550.c) + * modified to use CFG_ISA_MEM and new defines + */ + +#include <config.h> + +#ifdef CFG_PRINTF +#ifdef CFG_NS16550 + +#include <ns16550.h> + +#define LCRVAL LCR_8N1 /* 8 data, 1 stop, no parity */ +#define MCRVAL (MCR_DTR | MCR_RTS) /* RTS/DTR */ +#define FCRVAL (FCR_FIFO_EN | FCR_RXSR | FCR_TXSR) /* Clear & enable FIFOs */ + +void NS16550_init (NS16550_t com_port, int baud_divisor) +{ + com_port->ier = 0x00; +#ifdef CONFIG_OMAP + com_port->mdr1 = 0x7; /* mode select reset TL16C750*/ +#endif + com_port->lcr = LCR_BKSE | LCRVAL; + com_port->dll = baud_divisor & 0xff; + com_port->dlm = (baud_divisor >> 8) & 0xff; + com_port->lcr = LCRVAL; + com_port->mcr = MCRVAL; + com_port->fcr = FCRVAL; +#if defined(CONFIG_OMAP) + com_port->mdr1 = 0; /* select uart mode */ +#endif +} + +void NS16550_reinit (NS16550_t com_port, int baud_divisor) +{ + com_port->ier = 0x00; + com_port->lcr = LCR_BKSE; + com_port->dll = baud_divisor & 0xff; + com_port->dlm = (baud_divisor >> 8) & 0xff; + com_port->lcr = LCRVAL; + com_port->mcr = MCRVAL; + com_port->fcr = FCRVAL; +} + +void NS16550_putc (NS16550_t com_port, char c) +{ + while ((com_port->lsr & LSR_THRE) == 0); + com_port->thr = c; +} + +char NS16550_getc (NS16550_t com_port) +{ + while ((com_port->lsr & LSR_DR) == 0); + return (com_port->rbr); +} + +int NS16550_tstc (NS16550_t com_port) +{ + return ((com_port->lsr & LSR_DR) != 0); +} + +#endif +#endif |