2 * sbc8349.c -- WindRiver SBC8349 board support.
3 * Copyright (c) 2006-2007 Wind River Systems, Inc.
5 * Paul Gortmaker <paul.gortmaker@windriver.com>
6 * Based on board/mpc8349emds/mpc8349emds.c (and previous 834x releases.)
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/mpc8349_pci.h>
33 #include <spd_sdram.h>
35 #if defined(CONFIG_OF_LIBFDT)
39 int fixed_sdram(void);
40 void sdram_init(void);
42 #if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83xx)
43 void ddr_enable_ecc(unsigned int dram_size);
46 #ifdef CONFIG_BOARD_EARLY_INIT_F
47 int board_early_init_f (void)
53 #define ns2clk(ns) (ns / (1000000000 / CONFIG_8349_CLKIN) + 1)
55 phys_size_t initdram (int board_type)
57 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
60 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
63 /* DDR SDRAM - Main SODIMM */
64 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_BASE & LAWBAR_BAR;
65 #if defined(CONFIG_SPD_EEPROM)
68 msize = fixed_sdram();
71 * Initialize SDRAM if it is on local bus.
75 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
77 * Initialize and enable DDR ECC.
79 ddr_enable_ecc(msize * 1024 * 1024);
81 /* return total bus SDRAM size(bytes) -- DDR */
82 return (msize * 1024 * 1024);
85 #if !defined(CONFIG_SPD_EEPROM)
86 /*************************************************************************
87 * fixed sdram init -- doesn't use serial presence detect.
88 ************************************************************************/
91 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
92 u32 msize = CONFIG_SYS_DDR_SIZE;
93 u32 ddr_size = msize << 20; /* DDR size in bytes */
94 u32 ddr_size_log2 = __ilog2(msize);
96 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
97 im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
99 #if (CONFIG_SYS_DDR_SIZE != 256)
100 #warning Currently any ddr size other than 256 is not supported
103 #if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
104 #warning Chip select bounds is only configurable in 16MB increments
106 im->ddr.csbnds[2].csbnds =
107 ((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
108 (((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >>
109 CSBNDS_EA_SHIFT) & CSBNDS_EA);
110 im->ddr.cs_config[2] = CONFIG_SYS_DDR_CS2_CONFIG;
112 /* currently we use only one CS, so disable the other banks */
113 im->ddr.cs_config[0] = 0;
114 im->ddr.cs_config[1] = 0;
115 im->ddr.cs_config[3] = 0;
117 im->ddr.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1;
118 im->ddr.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2;
122 #if defined(CONFIG_DDR_2T_TIMING)
125 | SDRAM_CFG_SDRAM_TYPE_DDR1;
126 #if defined (CONFIG_DDR_32BIT)
127 /* for 32-bit mode burst length is 8 */
128 im->ddr.sdram_cfg |= (SDRAM_CFG_32_BE | SDRAM_CFG_8_BE);
130 im->ddr.sdram_mode = CONFIG_SYS_DDR_MODE;
132 im->ddr.sdram_interval = CONFIG_SYS_DDR_INTERVAL;
135 /* enable DDR controller */
136 im->ddr.sdram_cfg |= SDRAM_CFG_MEM_EN;
139 #endif/*!CONFIG_SYS_SPD_EEPROM*/
142 int checkboard (void)
144 puts("Board: Wind River SBC834x\n");
149 * if board is fitted with SDRAM
151 #if defined(CONFIG_SYS_BR2_PRELIM) \
152 && defined(CONFIG_SYS_OR2_PRELIM) \
153 && defined(CONFIG_SYS_LBLAWBAR2_PRELIM) \
154 && defined(CONFIG_SYS_LBLAWAR2_PRELIM)
156 * Initialize SDRAM memory on the Local Bus.
159 void sdram_init(void)
161 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
162 volatile fsl_lbc_t *lbc = &immap->im_lbc;
163 uint *sdram_addr = (uint *)CONFIG_SYS_LBC_SDRAM_BASE;
165 puts("\n SDRAM on Local Bus: ");
166 print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, "\n");
169 * Setup SDRAM Base and Option Registers, already done in cpu_init.c
172 /* setup mtrpt, lsrt and lbcr for LB bus */
173 lbc->lbcr = CONFIG_SYS_LBC_LBCR;
174 lbc->mrtpr = CONFIG_SYS_LBC_MRTPR;
175 lbc->lsrt = CONFIG_SYS_LBC_LSRT;
179 * Configure the SDRAM controller Machine Mode Register.
181 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_5; /* 0x40636733; normal operation */
183 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_1; /* 0x68636733; precharge all the banks */
188 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_2; /* 0x48636733; auto refresh */
215 /* 0x58636733; mode register write operation */
216 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_4;
221 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_5; /* 0x40636733; normal operation */
227 void sdram_init(void)
229 puts(" SDRAM on Local Bus: Disabled in config\n");
233 #if defined(CONFIG_OF_BOARD_SETUP)
234 void ft_board_setup(void *blob, bd_t *bd)
236 ft_cpu_setup(blob, bd);
238 ft_pci_setup(blob, bd);