mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-26 21:03:44 +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>
85 lines
2.2 KiB
C
85 lines
2.2 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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#include <watchdog.h>
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#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
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#define UART_MCRVAL (UART_MCR_DTR | \
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UART_MCR_RTS) /* RTS/DTR */
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#define UART_FCRVAL (UART_FCR_FIFO_EN | \
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UART_FCR_RXSR | \
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UART_FCR_TXSR) /* Clear & enable FIFOs */
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void NS16550_init (NS16550_t com_port, int baud_divisor)
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{
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com_port->ier = 0x00;
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#if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)
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com_port->mdr1 = 0x7; /* mode select reset TL16C750*/
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#endif
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com_port->lcr = UART_LCR_BKSE | UART_LCRVAL;
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com_port->dll = 0;
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com_port->dlm = 0;
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com_port->lcr = UART_LCRVAL;
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com_port->mcr = UART_MCRVAL;
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com_port->fcr = UART_FCRVAL;
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com_port->lcr = UART_LCR_BKSE | UART_LCRVAL;
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com_port->dll = baud_divisor & 0xff;
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com_port->dlm = (baud_divisor >> 8) & 0xff;
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com_port->lcr = UART_LCRVAL;
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#if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)
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#if defined(CONFIG_APTIX)
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com_port->mdr1 = 3; /* /13 mode so Aptix 6MHz can hit 115200 */
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#else
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com_port->mdr1 = 0; /* /16 is proper to hit 115200 with 48MHz */
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#endif
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#endif /* CONFIG_OMAP */
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}
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#ifndef CONFIG_NS16550_MIN_FUNCTIONS
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void NS16550_reinit (NS16550_t com_port, int baud_divisor)
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{
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com_port->ier = 0x00;
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com_port->lcr = UART_LCR_BKSE | UART_LCRVAL;
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com_port->dll = 0;
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com_port->dlm = 0;
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com_port->lcr = UART_LCRVAL;
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com_port->mcr = UART_MCRVAL;
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com_port->fcr = UART_FCRVAL;
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com_port->lcr = UART_LCR_BKSE;
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com_port->dll = baud_divisor & 0xff;
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com_port->dlm = (baud_divisor >> 8) & 0xff;
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com_port->lcr = UART_LCRVAL;
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}
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#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
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void NS16550_putc (NS16550_t com_port, char c)
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{
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while ((com_port->lsr & UART_LSR_THRE) == 0);
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com_port->thr = c;
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}
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#ifndef CONFIG_NS16550_MIN_FUNCTIONS
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char NS16550_getc (NS16550_t com_port)
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{
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while ((com_port->lsr & UART_LSR_DR) == 0) {
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#ifdef CONFIG_USB_TTY
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extern void usbtty_poll(void);
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usbtty_poll();
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#endif
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WATCHDOG_RESET();
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}
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return (com_port->rbr);
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}
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int NS16550_tstc (NS16550_t com_port)
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{
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return ((com_port->lsr & UART_LSR_DR) != 0);
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}
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#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
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