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u-boot/board/inka4x0/inka4x0.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 2008-2009
* Andreas Pfefferle, DENX Software Engineering, ap@denx.de.
*
* (C) Copyright 2009
* Detlev Zundel, DENX Software Engineering, dzu@denx.de.
*
* (C) Copyright 2004
* Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
*
* (C) Copyright 2004
* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
*
* (C) Copyright 2003-2004
* 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 <asm/io.h>
#include <common.h>
#include <mpc5xxx.h>
#include <pci.h>
#if defined(CONFIG_DDR_MT46V16M16)
#include "mt46v16m16-75.h"
#elif defined(CONFIG_SDR_MT48LC16M16A2)
#include "mt48lc16m16a2-75.h"
#elif defined(CONFIG_DDR_MT46V32M16)
#include "mt46v32m16.h"
#elif defined(CONFIG_DDR_HYB25D512160BF)
#include "hyb25d512160bf.h"
#elif defined(CONFIG_DDR_K4H511638C)
#include "k4h511638c.h"
#else
#error "INKA4x0 SDRAM: invalid chip type specified!"
#endif
#ifndef CONFIG_SYS_RAMBOOT
static void sdram_start (int hi_addr)
{
volatile struct mpc5xxx_sdram *sdram =
(struct mpc5xxx_sdram *)MPC5XXX_SDRAM;
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
/* unlock mode register */
out_be32(&sdram->ctrl, SDRAM_CONTROL | 0x80000000 | hi_addr_bit);
/* precharge all banks */
out_be32(&sdram->ctrl, SDRAM_CONTROL | 0x80000002 | hi_addr_bit);
#if SDRAM_DDR
/* set mode register: extended mode */
out_be32(&sdram->mode, SDRAM_EMODE);
/* set mode register: reset DLL */
out_be32(&sdram->mode, SDRAM_MODE | 0x04000000);
#endif
/* precharge all banks */
out_be32(&sdram->ctrl, SDRAM_CONTROL | 0x80000002 | hi_addr_bit);
/* auto refresh */
out_be32(&sdram->ctrl, SDRAM_CONTROL | 0x80000004 | hi_addr_bit);
/* set mode register */
out_be32(&sdram->mode, SDRAM_MODE);
/* normal operation */
out_be32(&sdram->ctrl, SDRAM_CONTROL | hi_addr_bit);
}
#endif
/*
* ATTENTION: Although partially referenced initdram does NOT make real use
* use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
* is something else than 0x00000000.
*/
phys_size_t initdram (int board_type)
{
volatile struct mpc5xxx_mmap_ctl *mm =
(struct mpc5xxx_mmap_ctl *) CONFIG_SYS_MBAR;
volatile struct mpc5xxx_cdm *cdm =
(struct mpc5xxx_cdm *) MPC5XXX_CDM;
volatile struct mpc5xxx_sdram *sdram =
(struct mpc5xxx_sdram *) MPC5XXX_SDRAM;
ulong dramsize = 0;
#ifndef CONFIG_SYS_RAMBOOT
long test1, test2;
/* setup SDRAM chip selects */
out_be32(&mm->sdram0, 0x0000001c); /* 512MB at 0x0 */
out_be32(&mm->sdram1, 0x40000000); /* disabled */
/* setup config registers */
out_be32(&sdram->config1, SDRAM_CONFIG1);
out_be32(&sdram->config2, SDRAM_CONFIG2);
#if SDRAM_DDR
/* set tap delay */
out_be32(&cdm->porcfg, SDRAM_TAPDELAY);
#endif
/* find RAM size using SDRAM CS0 only */
sdram_start(0);
test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x20000000);
sdram_start(1);
test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x20000000);
if (test1 > test2) {
sdram_start(0);
dramsize = test1;
} else {
dramsize = test2;
}
/* memory smaller than 1MB is impossible */
if (dramsize < (1 << 20)) {
dramsize = 0;
}
/* set SDRAM CS0 size according to the amount of RAM found */
if (dramsize > 0) {
out_be32(&mm->sdram0, 0x13 +
__builtin_ffs(dramsize >> 20) - 1);
} else {
out_be32(&mm->sdram0, 0); /* disabled */
}
out_be32(&mm->sdram1, dramsize); /* disabled */
#else /* CONFIG_SYS_RAMBOOT */
/* retrieve size of memory connected to SDRAM CS0 */
dramsize = in_be32(&mm->sdram0) & 0xFF;
if (dramsize >= 0x13) {
dramsize = (1 << (dramsize - 0x13)) << 20;
} else {
dramsize = 0;
}
#endif /* CONFIG_SYS_RAMBOOT */
return dramsize;
}
int checkboard (void)
{
puts ("Board: INKA 4X0\n");
return 0;
}
void flash_preinit(void)
{
volatile struct mpc5xxx_lpb *lpb = (struct mpc5xxx_lpb *)MPC5XXX_LPB;
/*
* Now, when we are in RAM, enable flash write
* access for detection process.
* Note that CS_BOOT (CS0) cannot be cleared when
* executing in flash.
*/
clrbits_be32(&lpb->cs0_cfg, 0x1); /* clear RO */
}
int misc_init_f (void)
{
volatile struct mpc5xxx_gpio *gpio =
(struct mpc5xxx_gpio *) MPC5XXX_GPIO;
volatile struct mpc5xxx_wu_gpio *wu_gpio =
(struct mpc5xxx_wu_gpio *)MPC5XXX_WU_GPIO;
volatile struct mpc5xxx_gpt *gpt;
char tmp[10];
int i, br;
i = getenv_f("brightness", tmp, sizeof(tmp));
br = (i > 0)
? (int) simple_strtoul (tmp, NULL, 10)
: CONFIG_SYS_BRIGHTNESS;
if (br > 255)
br = 255;
/* Initialize GPIO output pins.
*/
/* Configure GPT as GPIO output (and set them as they control low-active LEDs */
for (i = 0; i <= 5; i++) {
gpt = (struct mpc5xxx_gpt *)(MPC5XXX_GPT + (i * 0x10));
out_be32(&gpt->emsr, 0x34);
}
/* Configure GPT7 as PWM timer, 1kHz, no ints. */
gpt = (struct mpc5xxx_gpt *)(MPC5XXX_GPT + (7 * 0x10));
out_be32(&gpt->emsr, 0); /* Disable */
out_be32(&gpt->cir, 0x020000fe);
out_be32(&gpt->pwmcr, (br << 16));
out_be32(&gpt->emsr, 0x3); /* Enable PWM mode and start */
/* Configure PSC3_6,7 as GPIO output */
setbits_be32(&gpio->simple_gpioe, MPC5XXX_GPIO_SIMPLE_PSC3_6 |
MPC5XXX_GPIO_SIMPLE_PSC3_7);
setbits_be32(&gpio->simple_ddr, MPC5XXX_GPIO_SIMPLE_PSC3_6 |
MPC5XXX_GPIO_SIMPLE_PSC3_7);
/* Configure PSC3_9 and GPIO_WKUP6,7 as GPIO output */
setbits_8(&wu_gpio->enable, MPC5XXX_GPIO_WKUP_6 |
MPC5XXX_GPIO_WKUP_7 |
MPC5XXX_GPIO_WKUP_PSC3_9);
setbits_8(&wu_gpio->ddr, MPC5XXX_GPIO_WKUP_6 |
MPC5XXX_GPIO_WKUP_7 |
MPC5XXX_GPIO_WKUP_PSC3_9);
/* Set LR mirror bit because it is low-active */
setbits_8(&wu_gpio->dvo, MPC5XXX_GPIO_WKUP_7);
/* Reset Coral-P graphics controller */
setbits_8(&wu_gpio->dvo, MPC5XXX_GPIO_WKUP_PSC3_9);
/* Enable display backlight */
clrbits_8(&gpio->sint_inten, MPC5XXX_GPIO_SINT_PSC3_8);
setbits_8(&gpio->sint_gpioe, MPC5XXX_GPIO_SINT_PSC3_8);
setbits_8(&gpio->sint_ddr, MPC5XXX_GPIO_SINT_PSC3_8);
setbits_8(&gpio->sint_dvo, MPC5XXX_GPIO_SINT_PSC3_8);
/*
* Configure three wire serial interface to RTC (PSC1_4,
* PSC2_4, PSC3_4, PSC3_5)
*/
setbits_8(&wu_gpio->enable, MPC5XXX_GPIO_WKUP_PSC1_4 |
MPC5XXX_GPIO_WKUP_PSC2_4);
setbits_8(&wu_gpio->ddr, MPC5XXX_GPIO_WKUP_PSC1_4 |
MPC5XXX_GPIO_WKUP_PSC2_4);
clrbits_8(&wu_gpio->dvo, MPC5XXX_GPIO_WKUP_PSC1_4);
clrbits_8(&gpio->sint_inten, MPC5XXX_GPIO_SINT_PSC3_4 |
MPC5XXX_GPIO_SINT_PSC3_5);
setbits_8(&gpio->sint_gpioe, MPC5XXX_GPIO_SINT_PSC3_4 |
MPC5XXX_GPIO_SINT_PSC3_5);
setbits_8(&gpio->sint_ddr, MPC5XXX_GPIO_SINT_PSC3_5);
clrbits_8(&gpio->sint_dvo, MPC5XXX_GPIO_SINT_PSC3_5);
return 0;
}
#ifdef CONFIG_PCI
static struct pci_controller hose;
extern void pci_mpc5xxx_init(struct pci_controller *);
void pci_init_board(void)
{
pci_mpc5xxx_init(&hose);
}
#endif
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