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uboot-1.1.4-kirkwood/board/tqm834x/tqm834x.c

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u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* (C) Copyright 2005
* 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 <ioports.h>
#include <mpc83xx.h>
#include <asm/mpc8349_pci.h>
#include <i2c.h>
#include <spd.h>
#include <miiphy.h>
#include <asm-ppc/mmu.h>
#include <pci.h>
#define IOSYNC asm("eieio")
#define ISYNC asm("isync")
#define SYNC asm("sync")
#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
#define DDR_MAX_SIZE_PER_CS 0x20000000
#if defined(DDR_CASLAT_20)
#define TIMING_CASLAT TIMING_CFG1_CASLAT_20
#define MODE_CASLAT DDR_MODE_CASLAT_20
#else
#define TIMING_CASLAT TIMING_CFG1_CASLAT_25
#define MODE_CASLAT DDR_MODE_CASLAT_25
#endif
#define INITIAL_CS_CONFIG (CSCONFIG_EN | CSCONFIG_ROW_BIT_12 | \
CSCONFIG_COL_BIT_9)
/* Global variable used to store detected number of banks */
int tqm834x_num_flash_banks;
/* External definitions */
ulong flash_get_size (ulong base, int banknum);
extern flash_info_t flash_info[];
extern long spd_sdram (void);
/* Local functions */
static int detect_num_flash_banks(void);
static long int get_ddr_bank_size(short cs, volatile long *base);
static void set_cs_bounds(short cs, long base, long size);
static void set_cs_config(short cs, long config);
static void set_ddr_config(void);
/* Local variable */
static volatile immap_t *im = (immap_t *)CFG_IMMRBAR;
/**************************************************************************
* Board initialzation after relocation to RAM. Used to detect the number
* of Flash banks on TQM834x.
*/
int board_early_init_r (void) {
/* sanity check, IMMARBAR should be mirrored at offset zero of IMMR */
if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
return 0;
/* detect the number of Flash banks */
return detect_num_flash_banks();
}
/**************************************************************************
* DRAM initalization and size detection
*/
long int initdram (int board_type)
{
long bank_size;
long size;
int cs;
/* during size detection, set up the max DDRLAW size */
im->sysconf.ddrlaw[0].bar = CFG_DDR_BASE;
im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G);
/* set CS bounds to maximum size */
for(cs = 0; cs < 4; ++cs) {
set_cs_bounds(cs,
CFG_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS),
DDR_MAX_SIZE_PER_CS);
set_cs_config(cs, INITIAL_CS_CONFIG);
}
/* configure ddr controller */
set_ddr_config();
udelay(200);
/* enable DDR controller */
im->ddr.sdram_cfg = (SDRAM_CFG_MEM_EN |
SDRAM_CFG_SREN |
SDRAM_CFG_SDRAM_TYPE_DDR);
SYNC;
/* size detection */
debug("\n");
size = 0;
for(cs = 0; cs < 4; ++cs) {
debug("\nDetecting Bank%d\n", cs);
bank_size = get_ddr_bank_size(cs,
(volatile long*)(CFG_DDR_BASE + size));
size += bank_size;
debug("DDR Bank%d size: %d MiB\n\n", cs, bank_size >> 20);
/* exit if less than one bank */
if(size < DDR_MAX_SIZE_PER_CS) break;
}
return size;
}
/**************************************************************************
* checkboard()
*/
int checkboard (void)
{
puts("Board: TQM834x\n");
#ifdef CONFIG_PCI
DECLARE_GLOBAL_DATA_PTR;
volatile immap_t * immr;
u32 w, f;
immr = (immap_t *)CFG_IMMRBAR;
if (!(immr->reset.rcwh & RCWH_PCIHOST)) {
printf("PCI: NOT in host mode..?!\n");
return 0;
}
/* get bus width */
w = 32;
if (immr->reset.rcwh & RCWH_PCI64)
w = 64;
/* get clock */
f = gd->pci_clk;
printf("PCI1: %d bit, %d MHz\n", w, f / 1000000);
#else
printf("PCI: disabled\n");
#endif
return 0;
}
/**************************************************************************
*
* Local functions
*
*************************************************************************/
/**************************************************************************
* Detect the number of flash banks (1 or 2). Store it in
* a global variable tqm834x_num_flash_banks.
* Bank detection code based on the Monitor code.
*/
static int detect_num_flash_banks(void)
{
typedef unsigned long FLASH_PORT_WIDTH;
typedef volatile unsigned long FLASH_PORT_WIDTHV;
FPWV *bank1_base;
FPWV *bank2_base;
FPW bank1_read;
FPW bank2_read;
ulong bank1_size;
ulong bank2_size;
ulong total_size;
tqm834x_num_flash_banks = 2; /* assume two banks */
/* Get bank 1 and 2 information */
bank1_size = flash_get_size(CFG_FLASH_BASE, 0);
debug("Bank1 size: %lu\n", bank1_size);
bank2_size = flash_get_size(CFG_FLASH_BASE + bank1_size, 1);
debug("Bank2 size: %lu\n", bank2_size);
total_size = bank1_size + bank2_size;
if (bank2_size > 0) {
/* Seems like we've got bank 2, but maybe it's mirrored 1 */
/* Set the base addresses */
bank1_base = (FPWV *) (CFG_FLASH_BASE);
bank2_base = (FPWV *) (CFG_FLASH_BASE + bank1_size);
/* Put bank 2 into CFI command mode and read */
bank2_base[0x55] = 0x00980098;
IOSYNC;
ISYNC;
bank2_read = bank2_base[0x10];
/* Read from bank 1 (it's in read mode) */
bank1_read = bank1_base[0x10];
/* Reset Flash */
bank1_base[0] = 0x00F000F0;
bank2_base[0] = 0x00F000F0;
if (bank2_read == bank1_read) {
/*
* Looks like just one bank, but not sure yet. Let's
* read from bank 2 in autosoelect mode.
*/
bank2_base[0x0555] = 0x00AA00AA;
bank2_base[0x02AA] = 0x00550055;
bank2_base[0x0555] = 0x00900090;
IOSYNC;
ISYNC;
bank2_read = bank2_base[0x10];
/* Read from bank 1 (it's in read mode) */
bank1_read = bank1_base[0x10];
/* Reset Flash */
bank1_base[0] = 0x00F000F0;
bank2_base[0] = 0x00F000F0;
if (bank2_read == bank1_read) {
/*
* In both CFI command and autoselect modes,
* we got the some data reading from Flash.
* There is only one mirrored bank.
*/
tqm834x_num_flash_banks = 1;
total_size = bank1_size;
}
}
}
debug("Number of flash banks detected: %d\n", tqm834x_num_flash_banks);
/* set OR0 and BR0 */
im->lbus.bank[0].or = CFG_OR_TIMING_FLASH |
(-(total_size) & OR_GPCM_AM);
im->lbus.bank[0].br = (CFG_FLASH_BASE & BR_BA) |
(BR_MS_GPCM | BR_PS_32 | BR_V);
return (0);
}
/*************************************************************************
* Detect the size of a ddr bank. Sets CS bounds and CS config accordingly.
*/
static long int get_ddr_bank_size(short cs, volatile long *base)
{
/* This array lists all valid DDR SDRAM configurations, with
* Bank sizes in bytes. (Refer to Table 9-27 in the MPC8349E RM).
* The last entry has to to have size equal 0 and is igonred during
* autodection. Bank sizes must be in increasing order of size
*/
struct {
long row;
long col;
long size;
} conf[] = {
{CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_8, 32 << 20},
{CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_9, 64 << 20},
{CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_10, 128 << 20},
{CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_9, 128 << 20},
{CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_10, 256 << 20},
{CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_11, 512 << 20},
{CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_10, 512 << 20},
{CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_11, 1024 << 20},
{0, 0, 0}
};
int i;
int detected;
long size;
detected = -1;
for(i = 0; conf[i].size != 0; ++i) {
/* set sdram bank configuration */
set_cs_config(cs, CSCONFIG_EN | conf[i].col | conf[i].row);
debug("Getting RAM size...\n");
size = get_ram_size(base, DDR_MAX_SIZE_PER_CS);
if((size == conf[i].size) && (i == detected + 1))
detected = i;
debug("Trying %ld x %ld (%ld MiB) at addr %p, detected: %ld MiB\n",
conf[i].row,
conf[i].col,
conf[i].size >> 20,
base,
size >> 20);
}
if(detected == -1){
/* disable empty cs */
debug("\nNo valid configurations for CS%d, disabling...\n", cs);
set_cs_config(cs, 0);
return 0;
}
debug("\nDetected configuration %ld x %ld (%ld MiB) at addr %p\n",
conf[detected].row, conf[detected].col, conf[detected].size >> 20, base);
/* configure cs ro detected params */
set_cs_config(cs, CSCONFIG_EN | conf[detected].row |
conf[detected].col);
set_cs_bounds(cs, (long)base, conf[detected].size);
return(conf[detected].size);
}
/**************************************************************************
* Sets DDR bank CS bounds.
*/
static void set_cs_bounds(short cs, long base, long size)
{
debug("Setting bounds %08x, %08x for cs %d\n", base, size, cs);
if(size == 0){
im->ddr.csbnds[cs].csbnds = 0x00000000;
} else {
im->ddr.csbnds[cs].csbnds =
((base >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
(((base + size - 1) >> CSBNDS_EA_SHIFT) &
CSBNDS_EA);
}
SYNC;
}
/**************************************************************************
* Sets DDR banks CS configuration.
* config == 0x00000000 disables the CS.
*/
static void set_cs_config(short cs, long config)
{
debug("Setting config %08x for cs %d\n", config, cs);
im->ddr.cs_config[cs] = config;
SYNC;
}
/**************************************************************************
* Sets DDR clocks, timings and configuration.
*/
static void set_ddr_config(void) {
/* clock control */
im->ddr.sdram_clk_cntl = DDR_SDRAM_CLK_CNTL_SS_EN |
DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05;
SYNC;
/* timing configuration */
im->ddr.timing_cfg_1 =
(4 << TIMING_CFG1_PRETOACT_SHIFT) |
(7 << TIMING_CFG1_ACTTOPRE_SHIFT) |
(4 << TIMING_CFG1_ACTTORW_SHIFT) |
(5 << TIMING_CFG1_REFREC_SHIFT) |
(3 << TIMING_CFG1_WRREC_SHIFT) |
(3 << TIMING_CFG1_ACTTOACT_SHIFT) |
(1 << TIMING_CFG1_WRTORD_SHIFT) |
(TIMING_CFG1_CASLAT & TIMING_CASLAT);
im->ddr.timing_cfg_2 =
TIMING_CFG2_CPO_DEF |
(2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT);
SYNC;
/* don't enable DDR controller yet */
im->ddr.sdram_cfg =
SDRAM_CFG_SREN |
SDRAM_CFG_SDRAM_TYPE_DDR;
SYNC;
/* Set SDRAM mode */
im->ddr.sdram_mode =
((DDR_MODE_EXT_MODEREG | DDR_MODE_WEAK) <<
SDRAM_MODE_ESD_SHIFT) |
((DDR_MODE_MODEREG | DDR_MODE_BLEN_4) <<
SDRAM_MODE_SD_SHIFT) |
((DDR_MODE_CASLAT << SDRAM_MODE_SD_SHIFT) &
MODE_CASLAT);
SYNC;
/* Set fast SDRAM refresh rate */
im->ddr.sdram_interval =
(DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) |
(DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT);
SYNC;
}
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