+++ /dev/null
-/*
-<:copyright-gpl
- Copyright 2004 Broadcom Corp. All Rights Reserved.
-
- This program is free software; you can distribute it and/or modify it
- under the terms of the GNU General Public License (Version 2) as
- published by the Free Software Foundation.
-
- This program is distributed in the hope it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
-:>
-*/
-/*
- * Broadcom bcm63xx serial port initialization, also prepare for printk
- * by registering with console_init
- *
- */
-
-#include <linux/autoconf.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/console.h>
-#include <linux/sched.h>
-
-#include <asm/addrspace.h>
-#include <asm/irq.h>
-#include <asm/reboot.h>
-#include <asm/gdb-stub.h>
-#include <asm/mc146818rtc.h>
-
-#include <bcm_map_part.h>
-#include <6348_map_part.h>
-#include <board.h>
-
-#define SER63XX_DEFAULT_BAUD 115200
-#define BD_BCM63XX_TIMER_CLOCK_INPUT (FPERIPH)
-#define stUart ((volatile Uart * const) UART_BASE)
-
-// Transmit interrupts
-#define TXINT (TXFIFOEMT | TXUNDERR | TXOVFERR)
-// Receive interrupts
-#define RXINT (RXFIFONE | RXOVFERR)
-
-/* --------------------------------------------------------------------------
- Name: serial_init
- Purpose: Initalize the UART
--------------------------------------------------------------------------- */
-void __init serial_init(void)
-{
- u32 tmpVal = SER63XX_DEFAULT_BAUD;
- ULONG clockFreqHz;
-
-#if defined(CONFIG_BCM96345)
- // Make sure clock is ticking
- PERF->blkEnables |= UART_CLK_EN;
-#endif
-
- /* Dissable channel's receiver and transmitter. */
- stUart->control &= ~(BRGEN|TXEN|RXEN);
-
- /*--------------------------------------------------------------------*/
- /* Write the table value to the clock select register. */
- /* DPullen - this is the equation to use: */
- /* value = clockFreqHz / baud / 32-1; */
- /* (snmod) Actually you should also take into account any necessary */
- /* rounding. Divide by 16, look at lsb, if 0, divide by 2 */
- /* and subtract 1. If 1, just divide by 2 */
- /*--------------------------------------------------------------------*/
- clockFreqHz = BD_BCM63XX_TIMER_CLOCK_INPUT;
- tmpVal = (clockFreqHz / tmpVal) / 16;
- if( tmpVal & 0x01 )
- tmpVal /= 2; //Rounding up, so sub is already accounted for
- else
- tmpVal = (tmpVal / 2) - 1; // Rounding down so we must sub 1
- stUart->baudword = tmpVal;
-
- /* Finally, re-enable the transmitter and receiver. */
- stUart->control |= (BRGEN|TXEN|RXEN);
-
- stUart->config = (BITS8SYM | ONESTOP);
- // Set the FIFO interrupt depth ... stUart->fifocfg = 0xAA;
- stUart->fifoctl = RSTTXFIFOS | RSTRXFIFOS;
- stUart->intMask = 0;
- stUart->intMask = RXINT | TXINT;
-}
-
-
-/* prom_putc()
- * Output a character to the UART
- */
-void prom_putc(char c)
-{
- /* Wait for Tx uffer to empty */
- while (! (READ16(stUart->intStatus) & TXFIFOEMT));
- /* Send character */
- stUart->Data = c;
-}
-
-/* prom_puts()
- * Write a string to the UART
- */
-void prom_puts(const char *s)
-{
- while (*s) {
- if (*s == '\n') {
- prom_putc('\r');
- }
- prom_putc(*s++);
- }
-}
-
-
-/* prom_getc_nowait()
- * Returns a character from the UART
- * Returns -1 if no characters available or corrupted
- */
-int prom_getc_nowait(void)
-{
- uint16 uStatus;
- int cData = -1;
-
- uStatus = READ16(stUart->intStatus);
-
- if (uStatus & RXFIFONE) { /* Do we have a character? */
- cData = READ16(stUart->Data) & 0xff; /* Read character */
- if (uStatus & (RXFRAMERR | RXPARERR)) { /* If we got an error, throw it away */
- cData = -1;
- }
- }
-
- return cData;
-}
-
-/* prom_getc()
- * Returns a charcter from the serial port
- * Will block until it receives a valid character
-*/
-char prom_getc(void)
-{
- int cData = -1;
-
- /* Loop until we get a valid character */
- while(cData == -1) {
- cData = prom_getc_nowait();
- }
- return (char) cData;
-}
-
-/* prom_testc()
- * Returns 0 if no characters available
- */
-int prom_testc(void)
-{
- uint16 uStatus;
-
- uStatus = READ16(stUart->intStatus);
-
- return (uStatus & RXFIFONE);
-}
-
-#if defined (CONFIG_REMOTE_DEBUG)
-/* Prevent other code from writing to the serial port */
-void _putc(char c) { }
-void _puts(const char *ptr) { }
-#else
-/* Low level outputs call prom routines */
-void _putc(char c) {
- prom_putc(c);
-}
-void _puts(const char *ptr) {
- prom_puts(ptr);
-}
-#endif
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