mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
4fb25a3db3
This patch is the first step to consolidate the UIC related defines in the 4xx headers. Move header from asm-ppc/ppc4xx-intvec.h to asm-ppc/ppc4xx-uic.h as it will hold all UIC related defines in the next steps. Signed-off-by: Stefan Roese <sr@denx.de>
237 lines
7.9 KiB
C
237 lines
7.9 KiB
C
/*
|
|
* (C) Copyright 2000-2006
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that 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
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <commproc.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/io.h>
|
|
#include <watchdog.h>
|
|
|
|
#ifdef CONFIG_SERIAL_MULTI
|
|
#include <serial.h>
|
|
#endif
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#ifdef CONFIG_IOP480
|
|
|
|
#define SPU_BASE 0x40000000
|
|
|
|
#define spu_LineStat_rc 0x00 /* Line Status Register (Read/Clear) */
|
|
#define spu_LineStat_w 0x04 /* Line Status Register (Set) */
|
|
#define spu_Handshk_rc 0x08 /* Handshake Status Register (Read/Clear) */
|
|
#define spu_Handshk_w 0x0c /* Handshake Status Register (Set) */
|
|
#define spu_BRateDivh 0x10 /* Baud rate divisor high */
|
|
#define spu_BRateDivl 0x14 /* Baud rate divisor low */
|
|
#define spu_CtlReg 0x18 /* Control Register */
|
|
#define spu_RxCmd 0x1c /* Rx Command Register */
|
|
#define spu_TxCmd 0x20 /* Tx Command Register */
|
|
#define spu_RxBuff 0x24 /* Rx data buffer */
|
|
#define spu_TxBuff 0x24 /* Tx data buffer */
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Line Status Register.
|
|
+-----------------------------------------------------------------------------*/
|
|
#define asyncLSRport1 0x40000000
|
|
#define asyncLSRport1set 0x40000004
|
|
#define asyncLSRDataReady 0x80
|
|
#define asyncLSRFramingError 0x40
|
|
#define asyncLSROverrunError 0x20
|
|
#define asyncLSRParityError 0x10
|
|
#define asyncLSRBreakInterrupt 0x08
|
|
#define asyncLSRTxHoldEmpty 0x04
|
|
#define asyncLSRTxShiftEmpty 0x02
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Handshake Status Register.
|
|
+-----------------------------------------------------------------------------*/
|
|
#define asyncHSRport1 0x40000008
|
|
#define asyncHSRport1set 0x4000000c
|
|
#define asyncHSRDsr 0x80
|
|
#define asyncLSRCts 0x40
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Control Register.
|
|
+-----------------------------------------------------------------------------*/
|
|
#define asyncCRport1 0x40000018
|
|
#define asyncCRNormal 0x00
|
|
#define asyncCRLoopback 0x40
|
|
#define asyncCRAutoEcho 0x80
|
|
#define asyncCRDtr 0x20
|
|
#define asyncCRRts 0x10
|
|
#define asyncCRWordLength7 0x00
|
|
#define asyncCRWordLength8 0x08
|
|
#define asyncCRParityDisable 0x00
|
|
#define asyncCRParityEnable 0x04
|
|
#define asyncCREvenParity 0x00
|
|
#define asyncCROddParity 0x02
|
|
#define asyncCRStopBitsOne 0x00
|
|
#define asyncCRStopBitsTwo 0x01
|
|
#define asyncCRDisableDtrRts 0x00
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Receiver Command Register.
|
|
+-----------------------------------------------------------------------------*/
|
|
#define asyncRCRport1 0x4000001c
|
|
#define asyncRCRDisable 0x00
|
|
#define asyncRCREnable 0x80
|
|
#define asyncRCRIntDisable 0x00
|
|
#define asyncRCRIntEnabled 0x20
|
|
#define asyncRCRDMACh2 0x40
|
|
#define asyncRCRDMACh3 0x60
|
|
#define asyncRCRErrorInt 0x10
|
|
#define asyncRCRPauseEnable 0x08
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Transmitter Command Register.
|
|
+-----------------------------------------------------------------------------*/
|
|
#define asyncTCRport1 0x40000020
|
|
#define asyncTCRDisable 0x00
|
|
#define asyncTCREnable 0x80
|
|
#define asyncTCRIntDisable 0x00
|
|
#define asyncTCRIntEnabled 0x20
|
|
#define asyncTCRDMACh2 0x40
|
|
#define asyncTCRDMACh3 0x60
|
|
#define asyncTCRTxEmpty 0x10
|
|
#define asyncTCRErrorInt 0x08
|
|
#define asyncTCRStopPause 0x04
|
|
#define asyncTCRBreakGen 0x02
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Miscellanies defines.
|
|
+-----------------------------------------------------------------------------*/
|
|
#define asyncTxBufferport1 0x40000024
|
|
#define asyncRxBufferport1 0x40000024
|
|
#define asyncDLABLsbport1 0x40000014
|
|
#define asyncDLABMsbport1 0x40000010
|
|
#define asyncXOFFchar 0x13
|
|
#define asyncXONchar 0x11
|
|
|
|
/*
|
|
* Minimal serial functions needed to use one of the SMC ports
|
|
* as serial console interface.
|
|
*/
|
|
|
|
int serial_init (void)
|
|
{
|
|
volatile char val;
|
|
unsigned short br_reg;
|
|
|
|
br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
|
|
|
|
/*
|
|
* Init onboard UART
|
|
*/
|
|
out_8((u8 *)SPU_BASE + spu_LineStat_rc, 0x78); /* Clear all bits in Line Status Reg */
|
|
out_8((u8 *)SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
|
|
out_8((u8 *)SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
|
|
out_8((u8 *)SPU_BASE + spu_CtlReg, 0x08); /* Set 8 bits, no parity and 1 stop bit */
|
|
out_8((u8 *)SPU_BASE + spu_RxCmd, 0xb0); /* Enable Rx */
|
|
out_8((u8 *)SPU_BASE + spu_TxCmd, 0x9c); /* Enable Tx */
|
|
out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
|
|
val = in_8((u8 *)SPU_BASE + spu_RxBuff); /* Dummy read, to clear receiver */
|
|
|
|
return (0);
|
|
}
|
|
|
|
void serial_setbrg (void)
|
|
{
|
|
unsigned short br_reg;
|
|
|
|
br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
|
|
|
|
out_8((u8 *)SPU_BASE + spu_BRateDivl,
|
|
(br_reg & 0x00ff)); /* Set baud rate divisor... */
|
|
out_8((u8 *)SPU_BASE + spu_BRateDivh,
|
|
((br_reg & 0xff00) >> 8)); /* ... */
|
|
}
|
|
|
|
void serial_putc (const char c)
|
|
{
|
|
if (c == '\n')
|
|
serial_putc ('\r');
|
|
|
|
/* load status from handshake register */
|
|
if (in_8((u8 *)SPU_BASE + spu_Handshk_rc) != 00)
|
|
out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
|
|
|
|
out_8((u8 *)SPU_BASE + spu_TxBuff, c); /* Put char */
|
|
|
|
while ((in_8((u8 *)SPU_BASE + spu_LineStat_rc) & 04) != 04) {
|
|
if (in_8((u8 *)SPU_BASE + spu_Handshk_rc) != 00)
|
|
out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
|
|
}
|
|
}
|
|
|
|
void serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|
|
|
|
int serial_getc ()
|
|
{
|
|
unsigned char status = 0;
|
|
|
|
while (1) {
|
|
status = in_8((u8 *)asyncLSRport1);
|
|
if ((status & asyncLSRDataReady) != 0x0) {
|
|
break;
|
|
}
|
|
if ((status & ( asyncLSRFramingError |
|
|
asyncLSROverrunError |
|
|
asyncLSRParityError |
|
|
asyncLSRBreakInterrupt )) != 0) {
|
|
(void) out_8((u8 *)asyncLSRport1,
|
|
asyncLSRFramingError |
|
|
asyncLSROverrunError |
|
|
asyncLSRParityError |
|
|
asyncLSRBreakInterrupt );
|
|
}
|
|
}
|
|
return (0x000000ff & (int) in_8((u8 *)asyncRxBufferport1));
|
|
}
|
|
|
|
int serial_tstc ()
|
|
{
|
|
unsigned char status;
|
|
|
|
status = in_8((u8 *)asyncLSRport1);
|
|
if ((status & asyncLSRDataReady) != 0x0) {
|
|
return (1);
|
|
}
|
|
if ((status & ( asyncLSRFramingError |
|
|
asyncLSROverrunError |
|
|
asyncLSRParityError |
|
|
asyncLSRBreakInterrupt )) != 0) {
|
|
(void) out_8((u8 *)asyncLSRport1,
|
|
asyncLSRFramingError |
|
|
asyncLSROverrunError |
|
|
asyncLSRParityError |
|
|
asyncLSRBreakInterrupt);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_IOP480 */
|