mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
967 lines
28 KiB
C
967 lines
28 KiB
C
![]() |
/***********************************************************************
|
|||
|
*
|
|||
|
M* Modul: lwmon.c
|
|||
|
M*
|
|||
|
M* Content: LWMON specific U-Boot commands.
|
|||
|
*
|
|||
|
* (C) Copyright 2001, 2002
|
|||
|
* DENX Software Engineering
|
|||
|
* Wolfgang Denk, wd@denx.de
|
|||
|
* All rights reserved.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@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
|
|||
|
***********************************************************************/
|
|||
|
|
|||
|
/*---------------------------- Headerfiles ----------------------------*/
|
|||
|
#include <common.h>
|
|||
|
#include <mpc8xx.h>
|
|||
|
#include <commproc.h>
|
|||
|
#include <i2c.h>
|
|||
|
#include <command.h>
|
|||
|
#include <cmd_bsp.h>
|
|||
|
#include <malloc.h>
|
|||
|
#include <post.h>
|
|||
|
|
|||
|
#include <linux/types.h>
|
|||
|
#include <linux/string.h> /* for strdup */
|
|||
|
|
|||
|
/*------------------------ Local prototypes ---------------------------*/
|
|||
|
static long int dram_size (long int, long int *, long int);
|
|||
|
|
|||
|
|
|||
|
/*--------------------- Local macros and constants --------------------*/
|
|||
|
#define _NOT_USED_ 0xFFFFFFFF
|
|||
|
|
|||
|
/*
|
|||
|
* 66 MHz SDRAM access using UPM A
|
|||
|
*/
|
|||
|
const uint sdram_table[] =
|
|||
|
{
|
|||
|
#if defined(CFG_MEMORY_75) || defined(CFG_MEMORY_8E)
|
|||
|
/*
|
|||
|
* Single Read. (Offset 0 in UPM RAM)
|
|||
|
*/
|
|||
|
0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBAFC00,
|
|||
|
0x1FF5FC47, /* last */
|
|||
|
/*
|
|||
|
* SDRAM Initialization (offset 5 in UPM RAM)
|
|||
|
*
|
|||
|
* This is no UPM entry point. The following definition uses
|
|||
|
* the remaining space to establish an initialization
|
|||
|
* sequence, which is executed by a RUN command.
|
|||
|
*
|
|||
|
*/
|
|||
|
0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
|
|||
|
/*
|
|||
|
* Burst Read. (Offset 8 in UPM RAM)
|
|||
|
*/
|
|||
|
0x1F0DFC04, 0xEEAFBC04, 0x10AF7C04, 0xF0AFFC00,
|
|||
|
0xF0AFFC00, 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Single Write. (Offset 18 in UPM RAM)
|
|||
|
*/
|
|||
|
0x1F2DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Burst Write. (Offset 20 in UPM RAM)
|
|||
|
*/
|
|||
|
0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
|
|||
|
0xF0AFFC00, 0xE1BAFC04, 0x01FF5FC47, /* last */
|
|||
|
_NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Refresh (Offset 30 in UPM RAM)
|
|||
|
*/
|
|||
|
0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
|
|||
|
0xFFFFFC84, 0xFFFFFC07, /* last */
|
|||
|
_NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Exception. (Offset 3c in UPM RAM)
|
|||
|
*/
|
|||
|
0x7FFFFC07, /* last */
|
|||
|
0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
|
|||
|
#endif
|
|||
|
#ifdef CFG_MEMORY_7E
|
|||
|
/*
|
|||
|
* Single Read. (Offset 0 in UPM RAM)
|
|||
|
*/
|
|||
|
0x0E2DBC04, 0x11AF7C04, 0xEFBAFC00, 0x1FF5FC47, /* last */
|
|||
|
_NOT_USED_,
|
|||
|
/*
|
|||
|
* SDRAM Initialization (offset 5 in UPM RAM)
|
|||
|
*
|
|||
|
* This is no UPM entry point. The following definition uses
|
|||
|
* the remaining space to establish an initialization
|
|||
|
* sequence, which is executed by a RUN command.
|
|||
|
*
|
|||
|
*/
|
|||
|
0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
|
|||
|
/*
|
|||
|
* Burst Read. (Offset 8 in UPM RAM)
|
|||
|
*/
|
|||
|
0x0E2DBC04, 0x10AF7C04, 0xF0AFFC00, 0xF0AFFC00,
|
|||
|
0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
|
|||
|
_NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Single Write. (Offset 18 in UPM RAM)
|
|||
|
*/
|
|||
|
0x0E29BC04, 0x01B27C04, 0x1FF5FC47, /* last */
|
|||
|
_NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Burst Write. (Offset 20 in UPM RAM)
|
|||
|
*/
|
|||
|
0x0E29BC04, 0x10A77C00, 0xF0AFFC00, 0xF0AFFC00,
|
|||
|
0xE1BAFC04, 0x1FF5FC47, /* last */
|
|||
|
_NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Refresh (Offset 30 in UPM RAM)
|
|||
|
*/
|
|||
|
0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
|
|||
|
0xFFFFFC84, 0xFFFFFC07, /* last */
|
|||
|
_NOT_USED_, _NOT_USED_,
|
|||
|
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
|
|||
|
/*
|
|||
|
* Exception. (Offset 3c in UPM RAM)
|
|||
|
*/
|
|||
|
0x7FFFFC07, /* last */
|
|||
|
0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
|
|||
|
#endif
|
|||
|
};
|
|||
|
|
|||
|
/*
|
|||
|
* Check Board Identity:
|
|||
|
*
|
|||
|
*/
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: int checkboard (void) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: none
|
|||
|
P*
|
|||
|
P* Returnvalue: int - 0 is always returned
|
|||
|
*
|
|||
|
Z* Intention: This function is the checkboard() method implementation
|
|||
|
Z* for the lwmon board. Only a standard message is printed.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
int checkboard (void)
|
|||
|
{
|
|||
|
puts ("Board: Litronic Monitor IV\n");
|
|||
|
return (0);
|
|||
|
}
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: long int initdram (int board_type) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: int board_type
|
|||
|
P* - Usually type of the board - ignored here.
|
|||
|
P*
|
|||
|
P* Returnvalue: long int
|
|||
|
P* - Size of initialized memory
|
|||
|
*
|
|||
|
Z* Intention: This function is the initdram() method implementation
|
|||
|
Z* for the lwmon board.
|
|||
|
Z* The memory controller is initialized to access the
|
|||
|
Z* DRAM.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
long int initdram (int board_type)
|
|||
|
{
|
|||
|
volatile immap_t *immr = (immap_t *) CFG_IMMR;
|
|||
|
volatile memctl8xx_t *memctl = &immr->im_memctl;
|
|||
|
long int size_b0;
|
|||
|
long int size8, size9;
|
|||
|
int i;
|
|||
|
|
|||
|
/*
|
|||
|
* Configure UPMA for SDRAM
|
|||
|
*/
|
|||
|
upmconfig (UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
|
|||
|
|
|||
|
memctl->memc_mptpr = CFG_MPTPR;
|
|||
|
|
|||
|
/* burst length=4, burst type=sequential, CAS latency=2 */
|
|||
|
memctl->memc_mar = CFG_MAR;
|
|||
|
|
|||
|
/*
|
|||
|
* Map controller bank 3 to the SDRAM bank at preliminary address.
|
|||
|
*/
|
|||
|
memctl->memc_or3 = CFG_OR3_PRELIM;
|
|||
|
memctl->memc_br3 = CFG_BR3_PRELIM;
|
|||
|
|
|||
|
/* initialize memory address register */
|
|||
|
memctl->memc_mamr = CFG_MAMR_8COL; /* refresh not enabled yet */
|
|||
|
|
|||
|
/* mode initialization (offset 5) */
|
|||
|
udelay (200); /* 0x80006105 */
|
|||
|
memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x05);
|
|||
|
|
|||
|
/* run 2 refresh sequence with 4-beat refresh burst (offset 0x30) */
|
|||
|
udelay (1); /* 0x80006130 */
|
|||
|
memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
|
|||
|
udelay (1); /* 0x80006130 */
|
|||
|
memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
|
|||
|
|
|||
|
udelay (1); /* 0x80006106 */
|
|||
|
memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x06);
|
|||
|
|
|||
|
memctl->memc_mamr |= MAMR_PTBE; /* refresh enabled */
|
|||
|
|
|||
|
udelay (200);
|
|||
|
|
|||
|
/* Need at least 10 DRAM accesses to stabilize */
|
|||
|
for (i = 0; i < 10; ++i) {
|
|||
|
volatile unsigned long *addr =
|
|||
|
(volatile unsigned long *) SDRAM_BASE3_PRELIM;
|
|||
|
unsigned long val;
|
|||
|
|
|||
|
val = *(addr + i);
|
|||
|
*(addr + i) = val;
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* Check Bank 0 Memory Size for re-configuration
|
|||
|
*
|
|||
|
* try 8 column mode
|
|||
|
*/
|
|||
|
size8 = dram_size (CFG_MAMR_8COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
|
|||
|
|
|||
|
udelay (1000);
|
|||
|
|
|||
|
/*
|
|||
|
* try 9 column mode
|
|||
|
*/
|
|||
|
size9 = dram_size (CFG_MAMR_9COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
|
|||
|
|
|||
|
if (size8 < size9) { /* leave configuration at 9 columns */
|
|||
|
size_b0 = size9;
|
|||
|
memctl->memc_mamr = CFG_MAMR_9COL | MAMR_PTBE;
|
|||
|
udelay (500);
|
|||
|
} else { /* back to 8 columns */
|
|||
|
size_b0 = size8;
|
|||
|
memctl->memc_mamr = CFG_MAMR_8COL | MAMR_PTBE;
|
|||
|
udelay (500);
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* Final mapping:
|
|||
|
*/
|
|||
|
|
|||
|
memctl->memc_or3 = ((-size_b0) & 0xFFFF0000) |
|
|||
|
OR_CSNT_SAM | OR_G5LS | SDRAM_TIMING;
|
|||
|
memctl->memc_br3 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
|
|||
|
udelay (1000);
|
|||
|
|
|||
|
return (size_b0);
|
|||
|
}
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: static long int dram_size (long int mamr_value,
|
|||
|
F* long int *base,
|
|||
|
F* long int maxsize) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: long int mamr_value
|
|||
|
P* - Value for MAMR for the test
|
|||
|
P* long int *base
|
|||
|
P* - Base address for the test
|
|||
|
P* long int maxsize
|
|||
|
P* - Maximum size to test for
|
|||
|
P*
|
|||
|
P* Returnvalue: long int
|
|||
|
P* - Size of probed memory
|
|||
|
*
|
|||
|
Z* Intention: Check memory range for valid RAM. A simple memory test
|
|||
|
Z* determines the actually available RAM size between
|
|||
|
Z* addresses `base' and `base + maxsize'. Some (not all)
|
|||
|
Z* hardware errors are detected:
|
|||
|
Z* - short between address lines
|
|||
|
Z* - short between data lines
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
static long int dram_size (long int mamr_value, long int *base, long int maxsize)
|
|||
|
{
|
|||
|
volatile immap_t *immr = (immap_t *) CFG_IMMR;
|
|||
|
volatile memctl8xx_t *memctl = &immr->im_memctl;
|
|||
|
volatile long int *addr;
|
|||
|
ulong cnt, val;
|
|||
|
ulong save[32]; /* to make test non-destructive */
|
|||
|
unsigned char i = 0;
|
|||
|
|
|||
|
memctl->memc_mamr = mamr_value;
|
|||
|
|
|||
|
for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) {
|
|||
|
addr = base + cnt; /* pointer arith! */
|
|||
|
|
|||
|
save[i++] = *addr;
|
|||
|
*addr = ~cnt;
|
|||
|
}
|
|||
|
|
|||
|
/* write 0 to base address */
|
|||
|
addr = base;
|
|||
|
save[i] = *addr;
|
|||
|
*addr = 0;
|
|||
|
|
|||
|
/* check at base address */
|
|||
|
if ((val = *addr) != 0) {
|
|||
|
*addr = save[i];
|
|||
|
return (0);
|
|||
|
}
|
|||
|
|
|||
|
for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
|
|||
|
addr = base + cnt; /* pointer arith! */
|
|||
|
|
|||
|
val = *addr;
|
|||
|
*addr = save[--i];
|
|||
|
|
|||
|
if (val != (~cnt)) {
|
|||
|
return (cnt * sizeof (long));
|
|||
|
}
|
|||
|
}
|
|||
|
return (maxsize);
|
|||
|
}
|
|||
|
|
|||
|
/* ------------------------------------------------------------------------- */
|
|||
|
|
|||
|
#ifndef PB_ENET_TENA
|
|||
|
# define PB_ENET_TENA ((uint)0x00002000) /* PB 18 */
|
|||
|
#endif
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: int board_pre_init (void) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: none
|
|||
|
P*
|
|||
|
P* Returnvalue: int
|
|||
|
P* - 0 is always returned.
|
|||
|
*
|
|||
|
Z* Intention: This function is the board_pre_init() method implementation
|
|||
|
Z* for the lwmon board.
|
|||
|
Z* Disable Ethernet TENA on Port B.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
int board_pre_init (void)
|
|||
|
{
|
|||
|
volatile immap_t *immr = (immap_t *) CFG_IMMR;
|
|||
|
|
|||
|
/* Disable Ethernet TENA on Port B
|
|||
|
* Necessary because of pull up in COM3 port.
|
|||
|
*
|
|||
|
* This is just a preliminary fix, intended to turn off TENA
|
|||
|
* as soon as possible to avoid noise on the network. Once
|
|||
|
* I<EFBFBD>C is running we will make sure the interface is
|
|||
|
* correctly initialized.
|
|||
|
*/
|
|||
|
immr->im_cpm.cp_pbpar &= ~PB_ENET_TENA;
|
|||
|
immr->im_cpm.cp_pbodr &= ~PB_ENET_TENA;
|
|||
|
immr->im_cpm.cp_pbdat &= ~PB_ENET_TENA; /* set to 0 = disabled */
|
|||
|
immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
|
|||
|
return (0);
|
|||
|
}
|
|||
|
|
|||
|
/* ------------------------------------------------------------------------- */
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: void reset_phy (void) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: none
|
|||
|
P*
|
|||
|
P* Returnvalue: none
|
|||
|
*
|
|||
|
Z* Intention: Reset the PHY. In the lwmon case we do this by the
|
|||
|
Z* signaling the PIC I/O expander.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
void reset_phy (void)
|
|||
|
{
|
|||
|
uchar c;
|
|||
|
|
|||
|
#ifdef DEBUG
|
|||
|
printf ("### Switch on Ethernet for SCC2 ###\n");
|
|||
|
#endif
|
|||
|
c = pic_read (0x61);
|
|||
|
#ifdef DEBUG
|
|||
|
printf ("Old PIC read: reg_61 = 0x%02x\n", c);
|
|||
|
#endif
|
|||
|
c |= 0x40; /* disable COM3 */
|
|||
|
c &= ~0x80; /* enable Ethernet */
|
|||
|
pic_write (0x61, c);
|
|||
|
#ifdef DEBUG
|
|||
|
c = pic_read (0x61);
|
|||
|
printf ("New PIC read: reg_61 = 0x%02x\n", c);
|
|||
|
#endif
|
|||
|
udelay (1000);
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
/*------------------------- Keyboard controller -----------------------*/
|
|||
|
/* command codes */
|
|||
|
#define KEYBD_CMD_READ_KEYS 0x01
|
|||
|
#define KEYBD_CMD_READ_VERSION 0x02
|
|||
|
#define KEYBD_CMD_READ_STATUS 0x03
|
|||
|
#define KEYBD_CMD_RESET_ERRORS 0x10
|
|||
|
|
|||
|
/* status codes */
|
|||
|
#define KEYBD_STATUS_MASK 0x3F
|
|||
|
#define KEYBD_STATUS_H_RESET 0x20
|
|||
|
#define KEYBD_STATUS_BROWNOUT 0x10
|
|||
|
#define KEYBD_STATUS_WD_RESET 0x08
|
|||
|
#define KEYBD_STATUS_OVERLOAD 0x04
|
|||
|
#define KEYBD_STATUS_ILLEGAL_WR 0x02
|
|||
|
#define KEYBD_STATUS_ILLEGAL_RD 0x01
|
|||
|
|
|||
|
/* Number of bytes returned from Keyboard Controller */
|
|||
|
#define KEYBD_VERSIONLEN 2 /* version information */
|
|||
|
#define KEYBD_DATALEN 9 /* normal key scan data */
|
|||
|
|
|||
|
/* maximum number of "magic" key codes that can be assigned */
|
|||
|
|
|||
|
static uchar kbd_addr = CFG_I2C_KEYBD_ADDR;
|
|||
|
|
|||
|
static uchar *key_match (uchar *);
|
|||
|
|
|||
|
#define KEYBD_SET_DEBUGMODE '#' /* Magic key to enable debug output */
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: int misc_init_r (void) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: none
|
|||
|
P*
|
|||
|
P* Returnvalue: int
|
|||
|
P* - 0 is always returned, even in the case of a keyboard
|
|||
|
P* error.
|
|||
|
*
|
|||
|
Z* Intention: This function is the misc_init_r() method implementation
|
|||
|
Z* for the lwmon board.
|
|||
|
Z* The keyboard controller is initialized and the result
|
|||
|
Z* of a read copied to the environment variable "keybd".
|
|||
|
Z* If KEYBD_SET_DEBUGMODE is defined, a check is made for
|
|||
|
Z* this key, and if found display to the LCD will be enabled.
|
|||
|
Z* The keys in "keybd" are checked against the magic
|
|||
|
Z* keycommands defined in the environment.
|
|||
|
Z* See also key_match().
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
int misc_init_r (void)
|
|||
|
{
|
|||
|
uchar kbd_data[KEYBD_DATALEN];
|
|||
|
uchar tmp_data[KEYBD_DATALEN];
|
|||
|
uchar keybd_env[2 * KEYBD_DATALEN + 1];
|
|||
|
uchar val, errcd;
|
|||
|
uchar *str;
|
|||
|
int i;
|
|||
|
|
|||
|
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
|
|||
|
|
|||
|
/* Read initial keyboard error code */
|
|||
|
val = KEYBD_CMD_READ_STATUS;
|
|||
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|||
|
i2c_read (kbd_addr, 0, 0, &errcd, 1);
|
|||
|
/* clear unused bits */
|
|||
|
errcd &= KEYBD_STATUS_MASK;
|
|||
|
/* clear "irrelevant" bits. Recommended by Martin Rajek, LWN */
|
|||
|
errcd &= ~(KEYBD_STATUS_H_RESET|KEYBD_STATUS_BROWNOUT);
|
|||
|
if (errcd) {
|
|||
|
printf ("KEYBD: Error %02X\n", errcd);
|
|||
|
}
|
|||
|
/* Reset error code and verify */
|
|||
|
val = KEYBD_CMD_RESET_ERRORS;
|
|||
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|||
|
udelay(1000); /* delay NEEDED by keyboard PIC !!! */
|
|||
|
|
|||
|
val = KEYBD_CMD_READ_STATUS;
|
|||
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|||
|
i2c_read (kbd_addr, 0, 0, &val, 1);
|
|||
|
|
|||
|
val &= KEYBD_STATUS_MASK; /* clear unused bits */
|
|||
|
if (val) { /* permanent error, report it */
|
|||
|
printf ("*** Keyboard error code %02X ***\n", val);
|
|||
|
sprintf (keybd_env, "%02X", val);
|
|||
|
setenv ("keybd", keybd_env);
|
|||
|
return 0;
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* Now we know that we have a working keyboard, so disable
|
|||
|
* all output to the LCD except when a key press is detected.
|
|||
|
*/
|
|||
|
|
|||
|
if ((console_assign (stdout, "serial") < 0) ||
|
|||
|
(console_assign (stderr, "serial") < 0)) {
|
|||
|
printf ("Can't assign serial port as output device\n");
|
|||
|
}
|
|||
|
|
|||
|
/* Read Version */
|
|||
|
val = KEYBD_CMD_READ_VERSION;
|
|||
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|||
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_VERSIONLEN);
|
|||
|
printf ("KEYBD: Version %d.%d\n", kbd_data[0], kbd_data[1]);
|
|||
|
|
|||
|
/*
|
|||
|
* Read current keyboard state.
|
|||
|
*
|
|||
|
* After the error reset it may take some time before the
|
|||
|
* keyboard PIC picks up a valid keyboard scan - the total
|
|||
|
* scan time is approx. 1.6 ms (information by Martin Rajek,
|
|||
|
* 28 Sep 2002). We read a couple of times for the keyboard
|
|||
|
* to stabilize, using a big enough delay.
|
|||
|
* 10 times should be enough. If the data is still changing,
|
|||
|
* we use what we get :-(
|
|||
|
*/
|
|||
|
|
|||
|
memset (tmp_data, 0xFF, KEYBD_DATALEN); /* impossible value */
|
|||
|
for (i=0; i<10; ++i) {
|
|||
|
val = KEYBD_CMD_READ_KEYS;
|
|||
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|||
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
|
|||
|
|
|||
|
if (memcmp(kbd_data, tmp_data, KEYBD_DATALEN) == 0) {
|
|||
|
/* consistent state, done */
|
|||
|
break;
|
|||
|
}
|
|||
|
/* remeber last state, delay, and retry */
|
|||
|
memcpy (tmp_data, kbd_data, KEYBD_DATALEN);
|
|||
|
udelay (5000);
|
|||
|
}
|
|||
|
|
|||
|
for (i = 0; i < KEYBD_DATALEN; ++i) {
|
|||
|
sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
|
|||
|
}
|
|||
|
setenv ("keybd", keybd_env);
|
|||
|
|
|||
|
str = strdup (key_match (kbd_data)); /* decode keys */
|
|||
|
#ifdef KEYBD_SET_DEBUGMODE
|
|||
|
if (kbd_data[0] == KEYBD_SET_DEBUGMODE) { /* set debug mode */
|
|||
|
if ((console_assign (stdout, "lcd") < 0) ||
|
|||
|
(console_assign (stderr, "lcd") < 0)) {
|
|||
|
printf ("Can't assign LCD display as output device\n");
|
|||
|
}
|
|||
|
}
|
|||
|
#endif /* KEYBD_SET_DEBUGMODE */
|
|||
|
#ifdef CONFIG_PREBOOT /* automatically configure "preboot" command on key match */
|
|||
|
setenv ("preboot", str); /* set or delete definition */
|
|||
|
#endif /* CONFIG_PREBOOT */
|
|||
|
if (str != NULL) {
|
|||
|
free (str);
|
|||
|
}
|
|||
|
return (0);
|
|||
|
}
|
|||
|
|
|||
|
#ifdef CONFIG_PREBOOT
|
|||
|
|
|||
|
static uchar kbd_magic_prefix[] = "key_magic";
|
|||
|
static uchar kbd_command_prefix[] = "key_cmd";
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: static uchar *key_match (uchar *kbd_data) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: uchar *kbd_data
|
|||
|
P* - The keys to match against our magic definitions
|
|||
|
P*
|
|||
|
P* Returnvalue: uchar *
|
|||
|
P* - != NULL: Pointer to the corresponding command(s)
|
|||
|
P* NULL: No magic is about to happen
|
|||
|
*
|
|||
|
Z* Intention: Check if pressed key(s) match magic sequence,
|
|||
|
Z* and return the command string associated with that key(s).
|
|||
|
Z*
|
|||
|
Z* If no key press was decoded, NULL is returned.
|
|||
|
Z*
|
|||
|
Z* Note: the first character of the argument will be
|
|||
|
Z* overwritten with the "magic charcter code" of the
|
|||
|
Z* decoded key(s), or '\0'.
|
|||
|
Z*
|
|||
|
Z* Note: the string points to static environment data
|
|||
|
Z* and must be saved before you call any function that
|
|||
|
Z* modifies the environment.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
static uchar *key_match (uchar *kbd_data)
|
|||
|
{
|
|||
|
uchar compare[KEYBD_DATALEN-1];
|
|||
|
uchar magic[sizeof (kbd_magic_prefix) + 1];
|
|||
|
uchar extra;
|
|||
|
uchar *str, *nxt, *suffix;
|
|||
|
uchar *kbd_magic_keys;
|
|||
|
int i;
|
|||
|
|
|||
|
/*
|
|||
|
* The following string defines the characters that can pe appended
|
|||
|
* to "key_magic" to form the names of environment variables that
|
|||
|
* hold "magic" key codes, i. e. such key codes that can cause
|
|||
|
* pre-boot actions. If the string is empty (""), then only
|
|||
|
* "key_magic" is checked (old behaviour); the string "125" causes
|
|||
|
* checks for "key_magic1", "key_magic2" and "key_magic5", etc.
|
|||
|
*/
|
|||
|
if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
|
|||
|
kbd_magic_keys = "";
|
|||
|
|
|||
|
/* loop over all magic keys;
|
|||
|
* use '\0' suffix in case of empty string
|
|||
|
*/
|
|||
|
for (suffix=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix) {
|
|||
|
sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
|
|||
|
#if 0
|
|||
|
printf ("### Check magic \"%s\"\n", magic);
|
|||
|
#endif
|
|||
|
/* Don't include modifier byte */
|
|||
|
memcpy (compare, kbd_data+1, KEYBD_DATALEN-1);
|
|||
|
|
|||
|
extra = 0;
|
|||
|
|
|||
|
for (str= getenv(magic); str != NULL; str = (*nxt) ? nxt+1 : nxt) {
|
|||
|
uchar c;
|
|||
|
int k;
|
|||
|
|
|||
|
c = (uchar) simple_strtoul (str, (char **) (&nxt), 16);
|
|||
|
|
|||
|
if (str == nxt) { /* invalid character */
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* Check if this key matches the input.
|
|||
|
* Set matches to zero, so they match only once
|
|||
|
* and we can find duplicates or extra keys
|
|||
|
*/
|
|||
|
for (k = 0; k < sizeof(compare); ++k) {
|
|||
|
if (compare[k] == '\0') /* only non-zero entries */
|
|||
|
continue;
|
|||
|
if (c == compare[k]) { /* found matching key */
|
|||
|
compare[k] = '\0';
|
|||
|
break;
|
|||
|
}
|
|||
|
}
|
|||
|
if (k == sizeof(compare)) {
|
|||
|
extra = 1; /* unmatched key */
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* A full match leaves no keys in the `compare' array,
|
|||
|
* and has no extra keys
|
|||
|
*/
|
|||
|
|
|||
|
for (i = 0; i < sizeof(compare); ++i) {
|
|||
|
if (compare[i])
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
if ((i == sizeof(compare)) && (extra == 0)) {
|
|||
|
uchar cmd_name[sizeof (kbd_command_prefix) + 1];
|
|||
|
char *cmd;
|
|||
|
|
|||
|
sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
|
|||
|
|
|||
|
cmd = getenv (cmd_name);
|
|||
|
#if 0
|
|||
|
printf ("### Set PREBOOT to $(%s): \"%s\"\n",
|
|||
|
cmd_name, cmd ? cmd : "<<NULL>>");
|
|||
|
#endif
|
|||
|
*kbd_data = *suffix;
|
|||
|
return (cmd);
|
|||
|
}
|
|||
|
}
|
|||
|
#if 0
|
|||
|
printf ("### Delete PREBOOT\n");
|
|||
|
#endif
|
|||
|
*kbd_data = '\0';
|
|||
|
return (NULL);
|
|||
|
}
|
|||
|
#endif /* CONFIG_PREBOOT */
|
|||
|
|
|||
|
/*---------------Board Special Commands: PIC read/write ---------------*/
|
|||
|
|
|||
|
#if (CONFIG_COMMANDS & CFG_CMD_BSP)
|
|||
|
/***********************************************************************
|
|||
|
F* Function: int do_pic (cmd_tbl_t *cmdtp, int flag,
|
|||
|
F* int argc, char *argv[]) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: cmd_tbl_t *cmdtp
|
|||
|
P* - Pointer to our command table entry
|
|||
|
P* int flag
|
|||
|
P* - If the CMD_FLAG_REPEAT bit is set, then this call is
|
|||
|
P* a repetition
|
|||
|
P* int argc
|
|||
|
P* - Argument count
|
|||
|
P* char *argv[]
|
|||
|
P* - Array of the actual arguments
|
|||
|
P*
|
|||
|
P* Returnvalue: int
|
|||
|
P* - 0 The command was handled successfully
|
|||
|
P* 1 An error occurred
|
|||
|
*
|
|||
|
Z* Intention: Implement the "pic [read|write]" commands.
|
|||
|
Z* The read subcommand takes one argument, the register,
|
|||
|
Z* whereas the write command takes two, the register and
|
|||
|
Z* the new value.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
int do_pic (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|||
|
{
|
|||
|
uchar reg, val;
|
|||
|
|
|||
|
switch (argc) {
|
|||
|
case 3: /* PIC read reg */
|
|||
|
if (strcmp (argv[1], "read") != 0)
|
|||
|
break;
|
|||
|
|
|||
|
reg = simple_strtoul (argv[2], NULL, 16);
|
|||
|
|
|||
|
printf ("PIC read: reg %02x: %02x\n\n", reg, pic_read (reg));
|
|||
|
|
|||
|
return 0;
|
|||
|
case 4: /* PIC write reg val */
|
|||
|
if (strcmp (argv[1], "write") != 0)
|
|||
|
break;
|
|||
|
|
|||
|
reg = simple_strtoul (argv[2], NULL, 16);
|
|||
|
val = simple_strtoul (argv[3], NULL, 16);
|
|||
|
|
|||
|
printf ("PIC write: reg %02x val 0x%02x: %02x => ",
|
|||
|
reg, val, pic_read (reg));
|
|||
|
pic_write (reg, val);
|
|||
|
printf ("%02x\n\n", pic_read (reg));
|
|||
|
return 0;
|
|||
|
default:
|
|||
|
break;
|
|||
|
}
|
|||
|
printf ("Usage:\n%s\n", cmdtp->usage);
|
|||
|
return 1;
|
|||
|
}
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: int do_kbd (cmd_tbl_t *cmdtp, int flag,
|
|||
|
F* int argc, char *argv[]) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: cmd_tbl_t *cmdtp
|
|||
|
P* - Pointer to our command table entry
|
|||
|
P* int flag
|
|||
|
P* - If the CMD_FLAG_REPEAT bit is set, then this call is
|
|||
|
P* a repetition
|
|||
|
P* int argc
|
|||
|
P* - Argument count
|
|||
|
P* char *argv[]
|
|||
|
P* - Array of the actual arguments
|
|||
|
P*
|
|||
|
P* Returnvalue: int
|
|||
|
P* - 0 is always returned.
|
|||
|
*
|
|||
|
Z* Intention: Implement the "kbd" command.
|
|||
|
Z* The keyboard status is read. The result is printed on
|
|||
|
Z* the console and written into the "keybd" environment
|
|||
|
Z* variable.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
int do_kbd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|||
|
{
|
|||
|
uchar kbd_data[KEYBD_DATALEN];
|
|||
|
uchar keybd_env[2 * KEYBD_DATALEN + 1];
|
|||
|
uchar val;
|
|||
|
int i;
|
|||
|
|
|||
|
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
|
|||
|
|
|||
|
/* Read keys */
|
|||
|
val = KEYBD_CMD_READ_KEYS;
|
|||
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|||
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
|
|||
|
|
|||
|
puts ("Keys:");
|
|||
|
for (i = 0; i < KEYBD_DATALEN; ++i) {
|
|||
|
sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
|
|||
|
printf (" %02x", kbd_data[i]);
|
|||
|
}
|
|||
|
putc ('\n');
|
|||
|
setenv ("keybd", keybd_env);
|
|||
|
return 0;
|
|||
|
}
|
|||
|
|
|||
|
/* Read and set LSB switch */
|
|||
|
#define CFG_PC_TXD1_ENA 0x0008
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: int do_lsb (cmd_tbl_t *cmdtp, int flag,
|
|||
|
F* int argc, char *argv[]) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: cmd_tbl_t *cmdtp
|
|||
|
P* - Pointer to our command table entry
|
|||
|
P* int flag
|
|||
|
P* - If the CMD_FLAG_REPEAT bit is set, then this call is
|
|||
|
P* a repetition
|
|||
|
P* int argc
|
|||
|
P* - Argument count
|
|||
|
P* char *argv[]
|
|||
|
P* - Array of the actual arguments
|
|||
|
P*
|
|||
|
P* Returnvalue: int
|
|||
|
P* - 0 The command was handled successfully
|
|||
|
P* 1 An error occurred
|
|||
|
*
|
|||
|
Z* Intention: Implement the "lsb [on|off]" commands.
|
|||
|
Z* The lsb is switched according to the first parameter by
|
|||
|
Z* by signaling the PIC I/O expander.
|
|||
|
Z* Called with no arguments, the current setting is
|
|||
|
Z* printed.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
int do_lsb (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|||
|
{
|
|||
|
uchar val;
|
|||
|
immap_t *immr = (immap_t *) CFG_IMMR;
|
|||
|
|
|||
|
switch (argc) {
|
|||
|
case 1: /* lsb - print setting */
|
|||
|
val = pic_read (0x60);
|
|||
|
printf ("LSB is o%s\n", (val & 0x20) ? "n" : "ff");
|
|||
|
return 0;
|
|||
|
case 2: /* lsb on or lsb off - set switch */
|
|||
|
val = pic_read (0x60);
|
|||
|
|
|||
|
if (strcmp (argv[1], "on") == 0) {
|
|||
|
val |= 0x20;
|
|||
|
immr->im_ioport.iop_pcpar &= ~(CFG_PC_TXD1_ENA);
|
|||
|
immr->im_ioport.iop_pcdat |= CFG_PC_TXD1_ENA;
|
|||
|
immr->im_ioport.iop_pcdir |= CFG_PC_TXD1_ENA;
|
|||
|
} else if (strcmp (argv[1], "off") == 0) {
|
|||
|
val &= ~0x20;
|
|||
|
immr->im_ioport.iop_pcpar &= ~(CFG_PC_TXD1_ENA);
|
|||
|
immr->im_ioport.iop_pcdat &= ~(CFG_PC_TXD1_ENA);
|
|||
|
immr->im_ioport.iop_pcdir |= CFG_PC_TXD1_ENA;
|
|||
|
} else {
|
|||
|
break;
|
|||
|
}
|
|||
|
pic_write (0x60, val);
|
|||
|
return 0;
|
|||
|
default:
|
|||
|
break;
|
|||
|
}
|
|||
|
printf ("Usage:\n%s\n", cmdtp->usage);
|
|||
|
return 1;
|
|||
|
}
|
|||
|
|
|||
|
#endif /* CFG_CMD_BSP */
|
|||
|
|
|||
|
/*----------------------------- Utilities -----------------------------*/
|
|||
|
/***********************************************************************
|
|||
|
F* Function: uchar pic_read (uchar reg) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: uchar reg
|
|||
|
P* - Register to read
|
|||
|
P*
|
|||
|
P* Returnvalue: uchar
|
|||
|
P* - Value read from register
|
|||
|
*
|
|||
|
Z* Intention: Read a register from the PIC I/O expander.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
uchar pic_read (uchar reg)
|
|||
|
{
|
|||
|
return (i2c_reg_read (CFG_I2C_PICIO_ADDR, reg));
|
|||
|
}
|
|||
|
|
|||
|
/***********************************************************************
|
|||
|
F* Function: void pic_write (uchar reg, uchar val) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: uchar reg
|
|||
|
P* - Register to read
|
|||
|
P* uchar val
|
|||
|
P* - Value to write
|
|||
|
P*
|
|||
|
P* Returnvalue: none
|
|||
|
*
|
|||
|
Z* Intention: Write to a register on the PIC I/O expander.
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
void pic_write (uchar reg, uchar val)
|
|||
|
{
|
|||
|
i2c_reg_write (CFG_I2C_PICIO_ADDR, reg, val);
|
|||
|
}
|
|||
|
|
|||
|
/*---------------------- Board Control Functions ----------------------*/
|
|||
|
/***********************************************************************
|
|||
|
F* Function: void board_poweroff (void) P*A*Z*
|
|||
|
*
|
|||
|
P* Parameters: none
|
|||
|
P*
|
|||
|
P* Returnvalue: none
|
|||
|
*
|
|||
|
Z* Intention: Turn off the battery power and loop endless, so this
|
|||
|
Z* should better be the last function you call...
|
|||
|
*
|
|||
|
D* Design: wd@denx.de
|
|||
|
C* Coding: wd@denx.de
|
|||
|
V* Verification: dzu@denx.de
|
|||
|
***********************************************************************/
|
|||
|
void board_poweroff (void)
|
|||
|
{
|
|||
|
/* Turn battery off */
|
|||
|
((volatile immap_t *)CFG_IMMR)->im_ioport.iop_pcdat &= ~(1 << (31 - 13));
|
|||
|
|
|||
|
while (1);
|
|||
|
}
|