mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-13 14:46:21 +09:00
7f5eef93af
The omap2420H4 was the only mainline omap24xx board. Prior to being fixed by Jon Hunter in time for v2013.04 it had been functionally broken for a very long time. Remove this board as there's not been interest in it in U-Boot for quite a long time. Signed-off-by: Tom Rini <trini@ti.com>
134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
/*
|
|
* COM1 NS16550 support
|
|
* originally from linux source (arch/powerpc/boot/ns16550.c)
|
|
* modified to use CONFIG_SYS_ISA_MEM and new defines
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <ns16550.h>
|
|
#include <watchdog.h>
|
|
#include <linux/types.h>
|
|
#include <asm/io.h>
|
|
|
|
#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
|
|
#define UART_MCRVAL (UART_MCR_DTR | \
|
|
UART_MCR_RTS) /* RTS/DTR */
|
|
#define UART_FCRVAL (UART_FCR_FIFO_EN | \
|
|
UART_FCR_RXSR | \
|
|
UART_FCR_TXSR) /* Clear & enable FIFOs */
|
|
#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
|
|
#define serial_out(x, y) outb(x, (ulong)y)
|
|
#define serial_in(y) inb((ulong)y)
|
|
#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
|
|
#define serial_out(x, y) out_be32(y, x)
|
|
#define serial_in(y) in_be32(y)
|
|
#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
|
|
#define serial_out(x, y) out_le32(y, x)
|
|
#define serial_in(y) in_le32(y)
|
|
#else
|
|
#define serial_out(x, y) writeb(x, y)
|
|
#define serial_in(y) readb(y)
|
|
#endif
|
|
|
|
#ifndef CONFIG_SYS_NS16550_IER
|
|
#define CONFIG_SYS_NS16550_IER 0x00
|
|
#endif /* CONFIG_SYS_NS16550_IER */
|
|
|
|
void NS16550_init(NS16550_t com_port, int baud_divisor)
|
|
{
|
|
#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX))
|
|
/*
|
|
* On some OMAP3 devices when UART3 is configured for boot mode before
|
|
* SPL starts only THRE bit is set. We have to empty the transmitter
|
|
* before initialization starts.
|
|
*/
|
|
if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
|
|
== UART_LSR_THRE) {
|
|
serial_out(UART_LCR_DLAB, &com_port->lcr);
|
|
serial_out(baud_divisor & 0xff, &com_port->dll);
|
|
serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
|
|
serial_out(UART_LCRVAL, &com_port->lcr);
|
|
serial_out(0, &com_port->mdr1);
|
|
}
|
|
#endif
|
|
|
|
while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
|
|
;
|
|
|
|
serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
|
|
#if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
|
|
defined(CONFIG_AM33XX) || defined(CONFIG_TI814X)
|
|
serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/
|
|
#endif
|
|
serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
|
|
serial_out(0, &com_port->dll);
|
|
serial_out(0, &com_port->dlm);
|
|
serial_out(UART_LCRVAL, &com_port->lcr);
|
|
serial_out(UART_MCRVAL, &com_port->mcr);
|
|
serial_out(UART_FCRVAL, &com_port->fcr);
|
|
serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
|
|
serial_out(baud_divisor & 0xff, &com_port->dll);
|
|
serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
|
|
serial_out(UART_LCRVAL, &com_port->lcr);
|
|
#if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
|
|
defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \
|
|
defined(CONFIG_TI814X)
|
|
|
|
/* /16 is proper to hit 115200 with 48MHz */
|
|
serial_out(0, &com_port->mdr1);
|
|
#endif /* CONFIG_OMAP */
|
|
}
|
|
|
|
#ifndef CONFIG_NS16550_MIN_FUNCTIONS
|
|
void NS16550_reinit(NS16550_t com_port, int baud_divisor)
|
|
{
|
|
serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
|
|
serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
|
|
serial_out(0, &com_port->dll);
|
|
serial_out(0, &com_port->dlm);
|
|
serial_out(UART_LCRVAL, &com_port->lcr);
|
|
serial_out(UART_MCRVAL, &com_port->mcr);
|
|
serial_out(UART_FCRVAL, &com_port->fcr);
|
|
serial_out(UART_LCR_BKSE, &com_port->lcr);
|
|
serial_out(baud_divisor & 0xff, &com_port->dll);
|
|
serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
|
|
serial_out(UART_LCRVAL, &com_port->lcr);
|
|
}
|
|
#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
|
|
|
|
void NS16550_putc(NS16550_t com_port, char c)
|
|
{
|
|
while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
|
|
;
|
|
serial_out(c, &com_port->thr);
|
|
|
|
/*
|
|
* Call watchdog_reset() upon newline. This is done here in putc
|
|
* since the environment code uses a single puts() to print the complete
|
|
* environment upon "printenv". So we can't put this watchdog call
|
|
* in puts().
|
|
*/
|
|
if (c == '\n')
|
|
WATCHDOG_RESET();
|
|
}
|
|
|
|
#ifndef CONFIG_NS16550_MIN_FUNCTIONS
|
|
char NS16550_getc(NS16550_t com_port)
|
|
{
|
|
while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
|
|
#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
|
|
extern void usbtty_poll(void);
|
|
usbtty_poll();
|
|
#endif
|
|
WATCHDOG_RESET();
|
|
}
|
|
return serial_in(&com_port->rbr);
|
|
}
|
|
|
|
int NS16550_tstc(NS16550_t com_port)
|
|
{
|
|
return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
|
|
}
|
|
|
|
#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
|