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u-boot/board/ip860/ip860.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

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/*
* (C) Copyright 2000
* 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 <mpc8xx.h>
/* ------------------------------------------------------------------------- */
static long int dram_size (long int, long int *, long int);
unsigned long ip860_get_dram_size(void);
unsigned long ip860_get_clk_freq (void);
/* ------------------------------------------------------------------------- */
#define _NOT_USED_ 0xFFFFFFFF
const uint sdram_table[] = {
/*
* Single Read. (Offset 0 in UPMA RAM)
*/
0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
0x1ff77c47, /* last */
/*
* SDRAM Initialization (offset 5 in UPMA 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.
*
*/
0x1ff77c34, 0xefeabc34, 0x1fb57c35, /* last */
/*
* Burst Read. (Offset 8 in UPMA RAM)
*/
0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Single Write. (Offset 18 in UPMA RAM)
*/
0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Write. (Offset 20 in UPMA RAM)
*/
0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
0xf0affc00, 0xe1bbbc04, 0x1ff77c47, /* last */
_NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Refresh (Offset 30 in UPMA RAM)
*/
0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
0xfffffc84, 0xfffffc07, /* last */
_NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Exception. (Offset 3c in UPMA RAM)
*/
0x7ffffc07, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_,
};
/* ------------------------------------------------------------------------- */
int board_early_init_f(void)
{
volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
/* init BCSR chipselect line for ip860_get_clk_freq() and ip860_get_dram_size() */
memctl->memc_or4 = CONFIG_SYS_OR4;
memctl->memc_br4 = CONFIG_SYS_BR4;
return 0;
}
/* ------------------------------------------------------------------------- */
/*
* Check Board Identity:
*
* Test ID string (IP860...)
*/
int checkboard (void)
{
unsigned char *s, *e;
unsigned char buf[64];
int i;
puts ("Board: ");
i = getenv_f("serial#", (char *)buf, sizeof (buf));
s = (i > 0) ? buf : NULL;
if (!s || strncmp ((char *)s, "IP860", 5)) {
puts ("### No HW ID - assuming IP860");
} else {
for (e = s; *e; ++e) {
if (*e == ' ')
break;
}
for (; s < e; ++s) {
putc (*s);
}
}
putc ('\n');
return (0);
}
/* ------------------------------------------------------------------------- */
phys_size_t initdram (int board_type)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
long int size;
ulong refresh_val;
upmconfig (UPMA, (uint *) sdram_table,
sizeof (sdram_table) / sizeof (uint));
/*
* Preliminary prescaler for refresh
*/
if (ip860_get_clk_freq() == 50000000)
{
memctl->memc_mptpr = 0x0400;
refresh_val = 0xC3000000;
}
else
{
memctl->memc_mptpr = 0x0200;
refresh_val = 0x9C000000;
}
memctl->memc_mar = 0x00000088;
/*
* Map controller banks 2 to the SDRAM address
*/
memctl->memc_or2 = CONFIG_SYS_OR2;
memctl->memc_br2 = CONFIG_SYS_BR2;
/* IP860 boards have only one bank SDRAM */
udelay (200);
/* perform SDRAM initializsation sequence */
memctl->memc_mamr = 0x00804114 | refresh_val;
memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */
udelay(1);
memctl->memc_mamr = 0x00804118 | refresh_val;
memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */
udelay (1000);
/*
* Check SDRAM Memory Size
*/
if (ip860_get_dram_size() == 16)
size = dram_size (refresh_val | 0x00804114, SDRAM_BASE, SDRAM_MAX_SIZE);
else
size = dram_size (refresh_val | 0x00906114, SDRAM_BASE, SDRAM_MAX_SIZE);
udelay (1000);
memctl->memc_or2 = ((-size) & 0xFFFF0000) | SDRAM_TIMING;
memctl->memc_br2 = (CONFIG_SYS_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
udelay (10000);
/*
* Also, map other memory to correct position
*/
#if (defined(CONFIG_SYS_OR1) && defined(CONFIG_SYS_BR1_PRELIM))
memctl->memc_or1 = CONFIG_SYS_OR1;
memctl->memc_br1 = CONFIG_SYS_BR1;
#endif
#if defined(CONFIG_SYS_OR3) && defined(CONFIG_SYS_BR3)
memctl->memc_or3 = CONFIG_SYS_OR3;
memctl->memc_br3 = CONFIG_SYS_BR3;
#endif
#if defined(CONFIG_SYS_OR4) && defined(CONFIG_SYS_BR4)
memctl->memc_or4 = CONFIG_SYS_OR4;
memctl->memc_br4 = CONFIG_SYS_BR4;
#endif
#if defined(CONFIG_SYS_OR5) && defined(CONFIG_SYS_BR5)
memctl->memc_or5 = CONFIG_SYS_OR5;
memctl->memc_br5 = CONFIG_SYS_BR5;
#endif
#if defined(CONFIG_SYS_OR6) && defined(CONFIG_SYS_BR6)
memctl->memc_or6 = CONFIG_SYS_OR6;
memctl->memc_br6 = CONFIG_SYS_BR6;
#endif
#if defined(CONFIG_SYS_OR7) && defined(CONFIG_SYS_BR7)
memctl->memc_or7 = CONFIG_SYS_OR7;
memctl->memc_br7 = CONFIG_SYS_BR7;
#endif
return (size);
}
/* ------------------------------------------------------------------------- */
/*
* Check memory range for valid RAM. A simple memory test determines
* the actually available RAM size between addresses `base' and
* `base + maxsize'. Some (not all) hardware errors are detected:
* - short between address lines
* - short between data lines
*/
static long int dram_size (long int mamr_value, long int *base,
long int maxsize)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
memctl->memc_mamr = mamr_value;
return (get_ram_size(base, maxsize));
}
/* ------------------------------------------------------------------------- */
void reset_phy (void)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
ulong mask = PB_ENET_RESET | PB_ENET_JABD;
ulong reg;
/* Make sure PHY is not in low-power mode */
immr->im_cpm.cp_pbpar &= ~(mask); /* GPIO */
immr->im_cpm.cp_pbodr &= ~(mask); /* active output */
/* Set JABD low (no JABber Disable),
* and RESET high (Reset PHY)
*/
reg = immr->im_cpm.cp_pbdat;
reg = (reg & ~PB_ENET_JABD) | PB_ENET_RESET;
immr->im_cpm.cp_pbdat = reg;
/* now drive outputs */
immr->im_cpm.cp_pbdir |= mask; /* output */
udelay (1000);
/*
* Release RESET signal
*/
immr->im_cpm.cp_pbdat &= ~(PB_ENET_RESET);
udelay (1000);
}
/* ------------------------------------------------------------------------- */
unsigned long ip860_get_clk_freq(void)
{
volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE;
ulong temp;
uchar sysclk;
if ((bcsr->bd_status & 0x80) == 0x80) /* bd_rev valid ? */
sysclk = (bcsr->bd_rev & 0x18) >> 3;
else
sysclk = 0x00;
switch (sysclk)
{
case 0x00:
temp = 50000000;
break;
case 0x01:
temp = 80000000;
break;
default:
temp = 50000000;
break;
}
return (temp);
}
/* ------------------------------------------------------------------------- */
unsigned long ip860_get_dram_size(void)
{
volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE;
ulong temp;
uchar dram_size;
if ((bcsr->bd_status & 0x80) == 0x80) /* bd_rev valid ? */
dram_size = (bcsr->bd_rev & 0xE0) >> 5;
else
dram_size = 0x00; /* default is 16 MB */
switch (dram_size)
{
case 0x00:
temp = 16;
break;
case 0x01:
temp = 32;
break;
default:
temp = 16;
break;
}
return (temp);
}
/* ------------------------------------------------------------------------- */
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