diff options
Diffstat (limited to 'board/uc100/uc100.c')
| -rw-r--r-- | board/uc100/uc100.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/board/uc100/uc100.c b/board/uc100/uc100.c new file mode 100644 index 000000000..55977906d --- /dev/null +++ b/board/uc100/uc100.c @@ -0,0 +1,268 @@ +/* + * (C) Copyright 2000-2004 + * 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 + */ + +#if 0 +#define DEBUG +#endif + +#include <common.h> +#include <mpc8xx.h> +#include <i2c.h> + + +/*********************************************************************/ +/* UPMA Pre Initilization Table by WV (Miron MT48LC16M16A2-7E B) */ +/*********************************************************************/ +const uint sdram_init_upm_table[] = { + /* SDRAM Initialisation Sequence (offset 0 in UPMA RAM) WV */ + /* NOP - Precharge - AutoRefr - NOP - NOP */ + /* NOP - AutoRefr - NOP */ + /* NOP - NOP - LoadModeR - NOP - Active */ + /* Position of Single Read */ + 0x0ffffc04, 0x0ff77c04, 0x0ff5fc04, 0x0ffffc04, 0x0ffffc04, + 0x0ffffc04, 0x0ff5fc04, 0x0ffffc04, + + /* Burst Read. (offset 8 in UPMA RAM) */ + /* Cycle lent for Initialisation WV */ + 0x0ffffc04, 0x0ffffc34, 0x0f057c34, 0x0ffffc30, 0x1ff7fc05, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Single Write. (offset 18 in UPMA RAM) */ + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Burst Write. (offset 20 in UPMA RAM) */ + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Refresh (offset 30 in UPMA RAM) */ + 0x0FF77C04, 0x0FFFFC04, 0x0FF5FC84, 0x0FFFFC04, 0x0FFFFC04, + 0x0FFFFC84, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, + + /* Exception. (offset 3c in UPMA RAM) */ + 0x7FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, +}; + +/*********************************************************************/ +/* UPMA initilization table. */ +/*********************************************************************/ +const uint sdram_upm_table[] = { + /* single read. (offset 0 in UPMA RAM) */ + 0x0F07FC04, 0x0FFFFC04, 0x00BDFC04, 0x0FF77C00, 0x1FFFFC05, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, /* 0x05-0x07 new WV */ + + /* Burst Read. (offset 8 in UPMA RAM) */ + 0x0F07FC04, 0x0FFFFC04, 0x00BDFC04, 0x00FFFC00, 0x00FFFC00, + 0x00FFFC00, 0x0FF77C00, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Single Write. (offset 18 in UPMA RAM) */ + 0x0F07FC04, 0x0FFFFC00, 0x00BD7C04, 0x0FFFFC04, 0x0FF77C04, + 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Burst Write. (offset 20 in UPMA RAM) */ + 0x0F07FC04, 0x0FFFFC00, 0x00BD7C00, 0x00FFFC00, 0x00FFFC00, + 0x00FFFC04, 0x0FFFFC04, 0x0FF77C04, 0x1FFFFC05, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Refresh (offset 30 in UPMA RAM) */ + 0x0FF77C04, 0x0FFFFC04, 0x0FF5FC84, 0x0FFFFC04, 0x0FFFFC04, + 0x0FFFFC84, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, + + /* Exception. (offset 3c in UPMA RAM) */ + 0x7FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, /* 0x3C new WV */ +}; + +/*********************************************************************/ +/* UPMB initilization table. */ +/*********************************************************************/ +const uint mpm_upm_table[] = { + /* single read. (offset 0 in upm RAM) */ + 0x8FF00004, 0x0FF00004, 0x0FF81004, 0x1FF00001, + 0x1FF00001, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* burst read. (Offset 8 in upm RAM) */ + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* single write. (Offset 0x18 in upm RAM) */ + 0x8FF00004, 0x0FF00004, 0x0FF81004, 0x0FF00004, + 0x0FF00004, 0x1FF00001, 0xFFFFFFFF, 0xFFFFFFFF, + + /* burst write. (Offset 0x20 in upm RAM) */ + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Refresh cycle, offset 0x30 */ + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, + + /* Exception, 0ffset 0x3C */ + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, +}; + + +int board_switch(void) +{ + volatile pcmconf8xx_t *pcmp; + + pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia)); + + return ((pcmp->pcmc_pipr >> 24) & 0xf); +} + + +/* + * Check Board Identity: + */ +int checkboard (void) +{ + unsigned char str[64]; + int i = getenv_r ("serial#", str, sizeof(str)); + + puts ("Board: "); + + if (i == -1) { + puts ("### No HW ID - assuming UC100"); + } else { + puts(str); + } + + printf (" (SWITCH=%1X)\n", board_switch()); + + return 0; +} + + +/* + * Initialize SDRAM + */ +long int initdram (int board_type) +{ + volatile immap_t *immap = (immap_t *) CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + + /*---------------------------------------------------------------------*/ + /* Initialize the UPMA/UPMB registers with the appropriate table. */ + /*---------------------------------------------------------------------*/ + upmconfig (UPMA, (uint *) sdram_init_upm_table, + sizeof (sdram_init_upm_table) / sizeof (uint)); + upmconfig (UPMB, (uint *) mpm_upm_table, + sizeof (mpm_upm_table) / sizeof (uint)); + + /*---------------------------------------------------------------------*/ + /* Memory Periodic Timer Prescaler: divide by 16 */ + /*---------------------------------------------------------------------*/ + memctl->memc_mptpr = 0x0200; /* Divide by 32 WV */ + + memctl->memc_mamr = CFG_MAMR_VAL & 0xFF7FFFFF; /* Bit 8 := "0" Kein Refresh WV */ + memctl->memc_mbmr = CFG_MBMR_VAL; + + /*---------------------------------------------------------------------*/ + /* Initialize the Memory Controller registers, MPTPR, Chip Select 1 */ + /* for SDRAM */ + /* */ + /* NOTE: The refresh rate in MAMR reg is set according to the lowest */ + /* clock rate (16.67MHz) to allow proper operation for all ADS */ + /* clock frequencies. */ + /*---------------------------------------------------------------------*/ + memctl->memc_or1 = CFG_OR1_PRELIM; + memctl->memc_br1 = CFG_BR1_PRELIM; + + /*-------------------------------------------------------------------*/ + /* Wait at least 200 usec for DRAM to stabilize, this magic number */ + /* obtained from the init code. */ + /*-------------------------------------------------------------------*/ + udelay(200); + + memctl->memc_mamr = (memctl->memc_mamr | 0x04) & ~0x08; + + memctl->memc_br1 = CFG_BR1_PRELIM; + memctl->memc_or1 = CFG_OR1_PRELIM; + + /*---------------------------------------------------------------------*/ + /* run MRS command in location 5-8 of UPMB. */ + /*---------------------------------------------------------------------*/ + memctl->memc_mar = 0x88; + /* RUN UPMA on CS1 1-time from UPMA addr 0x05 */ + + memctl->memc_mcr = 0x80002100; + /* RUN UPMA on CS1 1-time from UPMA addr 0x00 WV */ + + udelay(200); + + /*---------------------------------------------------------------------*/ + /* Initialisation for normal access WV */ + /*---------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------*/ + /* Initialize the UPMA register with the appropriate table. */ + /*---------------------------------------------------------------------*/ + upmconfig (UPMA, (uint *) sdram_upm_table, + sizeof (sdram_upm_table) / sizeof (uint)); + + /*---------------------------------------------------------------------*/ + /* rerstore MBMR value (4-beat refresh burst.) */ + /*---------------------------------------------------------------------*/ + memctl->memc_mamr = CFG_MAMR_VAL | 0x00800000; /* Bit 8 := "1" Refresh Enable WV */ + + udelay(200); + + return (64 * 1024 * 1024); /* fixed setup for 64MBytes! */ +} + + +int misc_init_r (void) +{ + uchar val; + + /* + * Make sure that RTC has clock output enabled (triggers watchdog!) + */ + val = i2c_reg_read (CFG_I2C_RTC_ADDR, 0x0D); + val |= 0x80; + i2c_reg_write (CFG_I2C_RTC_ADDR, 0x0D, val); + + return 0; +} + + +#ifdef CONFIG_POST +/* + * Returns 1 if keys pressed to start the power-on long-running tests + * Called from board_init_f(). + */ +int post_hotkeys_pressed (void) +{ + return 0; /* No hotkeys supported */ +} +#endif |