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u-boot/board/a3m071/a3m071.c

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/*
* (C) Copyright 2003-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2004
* Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
*
* (C) Copyright 2006
* MicroSys GmbH
*
* Copyright 2012-2013 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <mpc5xxx.h>
#include <pci.h>
#include <miiphy.h>
#include <linux/compiler.h>
#include <asm/processor.h>
#include <asm/io.h>
#ifdef CONFIG_A4M2K
#include "is46r16320d.h"
#else
#include "mt46v16m16-75.h"
#endif
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_SYS_RAMBOOT) && \
(defined(CONFIG_SPL) && defined(CONFIG_SPL_BUILD))
static void sdram_start(int hi_addr)
{
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
long control = SDRAM_CONTROL | hi_addr_bit;
/* unlock mode register */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000000);
/* precharge all banks */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
#ifdef SDRAM_DDR
/* set mode register: extended mode */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_EMODE);
/* set mode register: reset DLL */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE | 0x04000000);
#endif
/* precharge all banks */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
/* auto refresh */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000004);
/* set mode register */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE);
/* normal operation */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control);
/*
* Wait a short while for the DLL to lock before accessing
* the SDRAM
*/
udelay(100);
}
#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)
{
ulong dramsize = 0;
ulong dramsize2 = 0;
uint svr, pvr;
#if !defined(CONFIG_SYS_RAMBOOT) && \
(defined(CONFIG_SPL) && defined(CONFIG_SPL_BUILD))
ulong test1, test2;
/* setup SDRAM chip selects */
out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0x0000001e); /* 2GB at 0x0 */
out_be32((void *)MPC5XXX_SDRAM_CS1CFG, 0x80000000); /* disabled */
/* setup config registers */
out_be32((void *)MPC5XXX_SDRAM_CONFIG1, SDRAM_CONFIG1);
out_be32((void *)MPC5XXX_SDRAM_CONFIG2, SDRAM_CONFIG2);
#ifdef SDRAM_DDR
/* set tap delay */
out_be32((void *)MPC5XXX_CDM_PORCFG, SDRAM_TAPDELAY);
#endif
/* find RAM size using SDRAM CS0 only */
sdram_start(0);
test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
sdram_start(1);
test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
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((void *)MPC5XXX_SDRAM_CS0CFG,
0x13 + __builtin_ffs(dramsize >> 20) - 1);
} else {
out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0); /* disabled */
}
#else /* CONFIG_SYS_RAMBOOT */
/* retrieve size of memory connected to SDRAM CS0 */
dramsize = in_be32((void *)MPC5XXX_SDRAM_CS0CFG) & 0xFF;
if (dramsize >= 0x13)
dramsize = (1 << (dramsize - 0x13)) << 20;
else
dramsize = 0;
/* retrieve size of memory connected to SDRAM CS1 */
dramsize2 = in_be32((void *)MPC5XXX_SDRAM_CS1CFG) & 0xFF;
if (dramsize2 >= 0x13)
dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
else
dramsize2 = 0;
#endif /* CONFIG_SYS_RAMBOOT */
/*
* On MPC5200B we need to set the special configuration delay in the
* DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
* Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
*
* "The SDelay should be written to a value of 0x00000004. It is
* required to account for changes caused by normal wafer processing
* parameters."
*/
svr = get_svr();
pvr = get_pvr();
if ((SVR_MJREV(svr) >= 2) && (PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4))
out_be32((void *)MPC5XXX_SDRAM_SDELAY, 0x04);
return dramsize + dramsize2;
}
static void get_revisions(int *failsavelevel, int *digiboardversion,
int *fpgaversion)
{
struct mpc5xxx_gpt_0_7 *gpt = (struct mpc5xxx_gpt_0_7 *)MPC5XXX_GPT;
u8 val;
/* read digitalboard-version from TMR[2..4] */
val = 0;
val |= (gpt->gpt2.sr & (1 << (31 - 23))) ? (1) : 0;
val |= (gpt->gpt3.sr & (1 << (31 - 23))) ? (1 << 1) : 0;
val |= (gpt->gpt4.sr & (1 << (31 - 23))) ? (1 << 2) : 0;
*digiboardversion = val;
/*
* A4M2K only supports digiboardversion. No failsavelevel and
* fpgaversion here.
*/
#if !defined(CONFIG_A4M2K)
/*
* Figure out failsavelevel
* see ticket dsvk#59
*/
*failsavelevel = 0; /* 0=failsave, 1=board ok, 2=fpga ok */
if (*digiboardversion == 0) {
*failsavelevel = 1; /* digiboard-version ok */
/* read fpga-version from TMR[5..7] */
val = 0;
val |= (gpt->gpt5.sr & (1 << (31 - 23))) ? (1) : 0;
val |= (gpt->gpt6.sr & (1 << (31 - 23))) ? (1 << 1) : 0;
val |= (gpt->gpt7.sr & (1 << (31 - 23))) ? (1 << 2) : 0;
*fpgaversion = val;
if (*fpgaversion == 1)
*failsavelevel = 2; /* fpga-version ok */
}
#endif
}
/*
* This function is called from the SPL U-Boot version for
* early init stuff, that needs to be done for OS (e.g. Linux)
* booting. Doing it later in the real U-Boot would not work
* in case that the SPL U-Boot boots Linux directly.
*/
void spl_board_init(void)
{
struct mpc5xxx_gpio *gpio = (struct mpc5xxx_gpio *)MPC5XXX_GPIO;
struct mpc5xxx_mmap_ctl *mm =
(struct mpc5xxx_mmap_ctl *)CONFIG_SYS_MBAR;
#if defined(CONFIG_A4M2K)
/* enable CS3 and CS5 (FPGA) */
setbits_be32(&mm->ipbi_ws_ctrl, (1 << 19) | (1 << 21));
#else
int digiboardversion;
int failsavelevel;
int fpgaversion;
u32 val;
get_revisions(&failsavelevel, &digiboardversion, &fpgaversion);
val = in_be32(&mm->ipbi_ws_ctrl);
/* first clear bits 19..21 (CS3...5) */
val &= ~((1 << 19) | (1 << 20) | (1 << 21));
if (failsavelevel == 2) {
/* FPGA ok */
val |= (1 << 19) | (1 << 21);
}
if (failsavelevel >= 1) {
/* at least digiboard-version ok */
val |= (1 << 20);
}
/* And write new value back to register */
out_be32(&mm->ipbi_ws_ctrl, val);
/* Setup pin multiplexing */
if (failsavelevel == 2) {
/* fpga-version ok */
#if defined(CONFIG_SYS_GPS_PORT_CONFIG_2)
out_be32(&gpio->port_config, CONFIG_SYS_GPS_PORT_CONFIG_2);
#endif
} else if (failsavelevel == 1) {
/* digiboard-version ok - fpga not */
#if defined(CONFIG_SYS_GPS_PORT_CONFIG_1)
out_be32(&gpio->port_config, CONFIG_SYS_GPS_PORT_CONFIG_1);
#endif
} else {
/* full failsave-mode */
#if defined(CONFIG_SYS_GPS_PORT_CONFIG)
out_be32(&gpio->port_config, CONFIG_SYS_GPS_PORT_CONFIG);
#endif
}
#endif
/*
* Setup gpio_wkup_7 as watchdog AS INPUT to disable it - see
* ticket #60
*
* MPC5XXX_WU_GPIO_DIR direction is already 0 (INPUT)
* set bit 0(msb) to 1
*/
setbits_be32((void *)MPC5XXX_WU_GPIO_ENABLE, CONFIG_WDOG_GPIO_PIN);
#if defined(CONFIG_A4M2K)
/* Setup USB[x] as MPCDiag[0..3] GPIO outputs */
/* set USB0,6,7,8 (MPCDiag[0..3]) direction to output */
gpio->simple_ddr |= 1 << (31 - 15);
gpio->simple_ddr |= 1 << (31 - 14);
gpio->simple_ddr |= 1 << (31 - 13);
gpio->simple_ddr |= 1 << (31 - 12);
/* enable USB0,6,7,8 (MPCDiag[0..3]) as GPIO */
gpio->simple_gpioe |= 1 << (31 - 15);
gpio->simple_gpioe |= 1 << (31 - 14);
gpio->simple_gpioe |= 1 << (31 - 13);
gpio->simple_gpioe |= 1 << (31 - 12);
/* Setup PSC2[0..2] as STSLED[0..2] GPIO outputs */
/* set PSC2[0..2] (STSLED[0..2]) direction to output */
gpio->simple_ddr |= 1 << (31 - 27);
gpio->simple_ddr |= 1 << (31 - 26);
gpio->simple_ddr |= 1 << (31 - 25);
/* enable PSC2[0..2] (STSLED[0..2]) as GPIO */
gpio->simple_gpioe |= 1 << (31 - 27);
gpio->simple_gpioe |= 1 << (31 - 26);
gpio->simple_gpioe |= 1 << (31 - 25);
/* Setup PSC6[2] as MRST2 self reset GPIO output */
/* set PSC6[2]/IRDA_TX (MRST2) direction to output */
gpio->simple_ddr |= 1 << (31 - 3);
/* set PSC6[2]/IRDA_TX (MRST2) output as open drain */
gpio->simple_ode |= 1 << (31 - 3);
/* set PSC6[2]/IRDA_TX (MRST2) output as default high */
gpio->simple_dvo |= 1 << (31 - 3);
/* enable PSC6[2]/IRDA_TX (MRST2) as GPIO */
gpio->simple_gpioe |= 1 << (31 - 3);
/* Setup PSC6[3] as HARNSSCD harness code GPIO input */
/* set PSC6[3]/IR_USB_CLK (HARNSSCD) direction to input */
gpio->simple_ddr |= 0 << (31 - 2);
/* enable PSC6[3]/IR_USB_CLK (HARNSSCD) as GPIO */
gpio->simple_gpioe |= 1 << (31 - 2);
#else
/* setup GPIOs for status-leds if needed - see ticket #57 */
if (failsavelevel > 0) {
/* digiboard-version is OK */
/* LED is LOW ACTIVE - so deactivate by set output to 1 */
gpio->simple_dvo |= 1 << (31 - 12);
gpio->simple_dvo |= 1 << (31 - 13);
/* set GPIO direction to output */
gpio->simple_ddr |= 1 << (31 - 12);
gpio->simple_ddr |= 1 << (31 - 13);
/* open drain config is set to "normal output" at reset */
/* gpio->simple_ode &=~ ( 1 << (31-12) ); */
/* gpio->simple_ode &=~ ( 1 << (31-13) ); */
/* enable as GPIO */
gpio->simple_gpioe |= 1 << (31 - 12);
gpio->simple_gpioe |= 1 << (31 - 13);
}
/* setup fpga irq - see ticket #65 */
if (failsavelevel > 1) {
/*
* The main irq initialisation is done in interrupts.c
* mpc5xxx_init_irq
*/
struct mpc5xxx_intr *intr =
(struct mpc5xxx_intr *)(MPC5XXX_ICTL);
setbits_be32(&intr->ctrl, 0x08C01801);
/*
* The MBAR+0x0524 Bit 21:23 CSe are ignored here due to the
* already cleared (intr_ctrl) MBAR+0x0510 ECLR[0] bit above
*/
}
#endif
}
int checkboard(void)
{
int digiboardversion;
int failsavelevel;
int fpgaversion;
get_revisions(&failsavelevel, &digiboardversion, &fpgaversion);
#ifdef CONFIG_A4M2K
puts("Board: A4M2K\n");
printf(" digiboard IO version %u\n", digiboardversion);
#else
puts("Board: A3M071\n");
printf("Rev: failsave level %u\n", failsavelevel);
printf(" digiboard IO version %u\n", digiboardversion);
if (failsavelevel > 0) /* only if fpga-version red */
printf(" fpga IO version %u\n", fpgaversion);
#endif
return 0;
}
/* miscellaneous platform dependent initialisations */
int misc_init_r(void)
{
/* adjust flash start and offset to detected values */
gd->bd->bi_flashstart = flash_info[0].start[0];
gd->bd->bi_flashoffset = 0;
/* adjust mapping */
out_be32((void *)MPC5XXX_BOOTCS_START,
START_REG(gd->bd->bi_flashstart));
out_be32((void *)MPC5XXX_CS0_START, START_REG(gd->bd->bi_flashstart));
out_be32((void *)MPC5XXX_BOOTCS_STOP,
STOP_REG(gd->bd->bi_flashstart, gd->bd->bi_flashsize));
out_be32((void *)MPC5XXX_CS0_STOP,
STOP_REG(gd->bd->bi_flashstart, gd->bd->bi_flashsize));
return 0;
}
#ifdef CONFIG_OF_BOARD_SETUP
int ft_board_setup(void *blob, bd_t *bd)
{
ft_cpu_setup(blob, bd);
return 0;
}
#endif /* CONFIG_OF_BOARD_SETUP */
#ifdef CONFIG_SPL_OS_BOOT
/*
* A3M071 specific implementation of spl_start_uboot()
*
* RETURN
* 0 if booting into OS is selected (default)
* 1 if booting into U-Boot is selected
*/
int spl_start_uboot(void)
{
char s[8];
env_init();
getenv_f("boot_os", s, sizeof(s));
if ((s != NULL) && (*s == '1' || *s == 'y' || *s == 'Y' ||
*s == 't' || *s == 'T'))
return 0;
return 1;
}
#endif
#if defined(CONFIG_HW_WATCHDOG)
static int watchdog_toggle;
void hw_watchdog_reset(void)
{
int val;
/*
* Check if watchdog is enabled via user command
*/
if ((gd->flags & GD_FLG_RELOC) && watchdog_toggle) {
/* Set direction to output */
setbits_be32((void *)MPC5XXX_WU_GPIO_DIR, CONFIG_WDOG_GPIO_PIN);
/*
* Toggle watchdog output
*/
val = (in_be32((void *)MPC5XXX_WU_GPIO_DATA_O) &
CONFIG_WDOG_GPIO_PIN);
if (val) {
clrbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O,
CONFIG_WDOG_GPIO_PIN);
} else {
setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O,
CONFIG_WDOG_GPIO_PIN);
}
}
}
int do_wdog_toggle(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (argc != 2)
goto usage;
if (strncmp(argv[1], "on", 2) == 0)
watchdog_toggle = 1;
else if (strncmp(argv[1], "off", 3) == 0)
watchdog_toggle = 0;
else
goto usage;
return 0;
usage:
printf("Usage: wdogtoggle %s\n", cmdtp->usage);
return 1;
}
U_BOOT_CMD(
wdogtoggle, CONFIG_SYS_MAXARGS, 2, do_wdog_toggle,
"toggle GPIO pin to service watchdog",
"[on/off] - Switch watchdog toggling via GPIO pin on/off"
);
#endif
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