u-boot/board/gen860t/gen860t.c
Wolfgang Denk cdb749778a Rename getenv_r() into getenv_f()
While running from flash, i. e. before relocation, we have only a
limited C runtime environment without writable data segment. In this
phase, some configurations (for example with environment in EEPROM)
must not use the normal getenv(), but a special function.  This
function had been called getenv_r(), with the idea that the "_r"
suffix would mean the same as in the _r_eentrant versions of some of
the C library functions (for example getdate vs. getdate_r, getgrent
vs. getgrent_r, etc.).

Unfortunately this was a misleading name, as in U-Boot the "_r"
generally means "running from RAM", i. e. _after_ relocation.

To avoid confusion, rename into getenv_f() [as "running from flash"]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
2010-08-04 00:45:36 +02:00

295 lines
7.6 KiB
C

/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Keith Outwater, keith_outwater@mvis.com
*
* 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 <virtex2.h>
#include <common.h>
#include <mpc8xx.h>
#include <asm/8xx_immap.h>
#include "beeper.h"
#include "fpga.h"
#include "ioport.h"
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_STATUS_LED
#include <status_led.h>
#endif
#if defined(CONFIG_CMD_MII) && defined(CONFIG_MII)
#include <net.h>
#endif
#if 0
#define GEN860T_DEBUG
#endif
#ifdef GEN860T_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
/*
* The following UPM init tables were generated automatically by
* Motorola's MCUINIT program. See the README file for UPM to
* SDRAM pin assignments if you want to type this data into
* MCUINIT in order to reverse engineer the waveforms.
*/
/*
* UPM initialization tables for MICRON MT48LC16M16A2TG SDRAM devices
* (UPMA) and Virtex FPGA SelectMap interface (UPMB).
* NOTE that unused areas of the table are used to hold NOP, precharge
* and mode register set sequences.
*
*/
#define UPMA_NOP_ADDR 0x5
#define UPMA_PRECHARGE_ADDR 0x6
#define UPMA_MRS_ADDR 0x12
#define UPM_SINGLE_READ_ADDR 0x00
#define UPM_BURST_READ_ADDR 0x08
#define UPM_SINGLE_WRITE_ADDR 0x18
#define UPM_BURST_WRITE_ADDR 0x20
#define UPM_REFRESH_ADDR 0x30
const uint sdram_upm_table[] = {
/* single read (offset 0x00 in upm ram) */
0x0e0fdc04, 0x01adfc04, 0x0fbffc00, 0x1fff5c05,
0xffffffff, 0x0fffffcd, 0x0fff0fce, 0xefcfffff,
/* burst read (offset 0x08 in upm ram) */
0x0f0fdc04, 0x00fdfc04, 0xf0fffc00, 0xf0fffc00,
0xf1fffc00, 0xfffffc00, 0xfffffc05, 0xffffffff,
0xffffffff, 0xffffffff, 0x0ffffff4, 0x1f3d5ff4,
0xfffffff4, 0xfffffff5, 0xffffffff, 0xffffffff,
/* single write (offset 0x18 in upm ram) */
0x0f0fdc04, 0x00ad3c00, 0x1fff5c05, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* burst write (offset 0x20 in upm ram) */
0x0f0fdc00, 0x10fd7c00, 0xf0fffc00, 0xf0fffc00,
0xf1fffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xfffff7ff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* refresh (offset 0x30 in upm ram) */
0x1ffddc84, 0xfffffc04, 0xfffffc04, 0xfffffc84,
0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* exception (offset 0x3C in upm ram) */
};
const uint selectmap_upm_table[] = {
/* single read (offset 0x00 in upm ram) */
0x88fffc06, 0x00fff404, 0x00fffc04, 0x33fffc00,
0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff,
/* burst read (offset 0x08 in upm ram) */
0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* single write (offset 0x18 in upm ram) */
0x88fffc04, 0x00fff400, 0x77fffc05, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* burst write (offset 0x20 in upm ram) */
0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* refresh (offset 0x30 in upm ram) */
0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
/* exception (offset 0x3C in upm ram) */
0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff
};
/*
* Check board identity. Always successful (gives information only)
*/
int checkboard (void)
{
char *s;
char buf[64];
int i;
i = getenv_f("board_id", buf, sizeof (buf));
s = (i > 0) ? buf : NULL;
if (s) {
printf ("%s ", s);
} else {
printf ("<unknown> ");
}
i = getenv_f("serial#", buf, sizeof (buf));
s = (i > 0) ? buf : NULL;
if (s) {
printf ("S/N %s\n", s);
} else {
printf ("S/N <unknown>\n");
}
printf ("CPU at %s MHz, ", strmhz (buf, gd->cpu_clk));
printf ("local bus at %s MHz\n", strmhz (buf, gd->bus_clk));
return (0);
}
/*
* Initialize SDRAM
*/
phys_size_t initdram (int board_type)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immr->im_memctl;
upmconfig (UPMA,
(uint *) sdram_upm_table,
sizeof (sdram_upm_table) / sizeof (uint)
);
/*
* Setup MAMR register
*/
memctl->memc_mptpr = CONFIG_SYS_MPTPR_1BK_8K;
memctl->memc_mamr = CONFIG_SYS_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
/*
* Map CS1* to SDRAM bank
*/
memctl->memc_or1 = CONFIG_SYS_OR1;
memctl->memc_br1 = CONFIG_SYS_BR1;
/*
* Perform SDRAM initialization sequence:
* 1. Apply at least one NOP command
* 2. 100 uS delay (JEDEC standard says 200 uS)
* 3. Issue 4 precharge commands
* 4. Perform two refresh cycles
* 5. Program mode register
*
* Program SDRAM for standard operation, sequential burst, burst length
* of 4, CAS latency of 2.
*/
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
MCR_MLCF (0) | UPMA_NOP_ADDR;
udelay (200);
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
MCR_MLCF (4) | UPMA_PRECHARGE_ADDR;
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
MCR_MLCF (2) | UPM_REFRESH_ADDR;
memctl->memc_mar = 0x00000088;
memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
MCR_MLCF (1) | UPMA_MRS_ADDR;
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
MCR_MLCF (0) | UPMA_NOP_ADDR;
/*
* Enable refresh
*/
memctl->memc_mamr |= MAMR_PTAE;
return (SDRAM_SIZE);
}
/*
* Disk On Chip (DOC) Millenium initialization.
* The DOC lives in the CS2* space
*/
#if defined(CONFIG_CMD_DOC)
void doc_init (void)
{
printf ("Probing at 0x%.8x: ", DOC_BASE);
doc_probe (DOC_BASE);
}
#endif
/*
* Miscellaneous intialization
*/
int misc_init_r (void)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immr->im_memctl;
/*
* Set up UPMB to handle the Virtex FPGA SelectMap interface
*/
upmconfig (UPMB, (uint *) selectmap_upm_table,
sizeof (selectmap_upm_table) / sizeof (uint));
memctl->memc_mbmr = 0x0;
config_mpc8xx_ioports (immr);
#if defined(CONFIG_CMD_MII)
mii_init ();
#endif
#if defined(CONFIG_FPGA)
gen860t_init_fpga ();
#endif
return 0;
}
/*
* Final init hook before entering command loop.
*/
int last_stage_init (void)
{
#if !defined(CONFIG_SC)
char buf[256];
int i;
/*
* Turn the beeper volume all the way down in case this is a warm boot.
*/
set_beeper_volume (-64);
init_beeper ();
/*
* Read the environment to see what to do with the beeper
*/
i = getenv_f("beeper", buf, sizeof (buf));
if (i > 0) {
do_beeper (buf);
}
#endif
return 0;
}
/*
* Stub to make POST code happy. Can't self-poweroff, so just hang.
*/
void board_poweroff (void)
{
puts ("### Please power off the board ###\n");
while (1);
}