1 // SPDX-License-Identifier: GPL-2.0+
3 * sbc8349.c -- WindRiver SBC8349 board support.
4 * Copyright (c) 2006-2007 Wind River Systems, Inc.
6 * Paul Gortmaker <paul.gortmaker@windriver.com>
7 * Based on board/mpc8349emds/mpc8349emds.c (and previous 834x releases.)
11 #include <fdt_support.h>
15 #include <asm/mpc8349_pci.h>
17 #include <spd_sdram.h>
19 #if defined(CONFIG_OF_LIBFDT)
20 #include <linux/libfdt.h>
22 #include <linux/delay.h>
24 DECLARE_GLOBAL_DATA_PTR;
26 int fixed_sdram(void);
27 void sdram_init(void);
29 #if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83xx)
30 void ddr_enable_ecc(unsigned int dram_size);
33 #ifdef CONFIG_BOARD_EARLY_INIT_F
34 int board_early_init_f (void)
40 #define ns2clk(ns) (ns / (1000000000 / CONFIG_8349_CLKIN) + 1)
44 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
47 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
50 /* DDR SDRAM - Main SODIMM */
51 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_SDRAM_BASE & LAWBAR_BAR;
52 #if defined(CONFIG_SPD_EEPROM)
55 msize = fixed_sdram();
58 * Initialize SDRAM if it is on local bus.
62 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
64 * Initialize and enable DDR ECC.
66 ddr_enable_ecc(msize * 1024 * 1024);
68 /* set total bus SDRAM size(bytes) -- DDR */
69 gd->ram_size = msize * 1024 * 1024;
74 #if !defined(CONFIG_SPD_EEPROM)
75 /*************************************************************************
76 * fixed sdram init -- doesn't use serial presence detect.
77 ************************************************************************/
80 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
81 u32 msize = CONFIG_SYS_DDR_SIZE;
82 u32 ddr_size = msize << 20; /* DDR size in bytes */
83 u32 ddr_size_log2 = __ilog2(msize);
85 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_SDRAM_BASE & 0xfffff000;
86 im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
88 #if (CONFIG_SYS_DDR_SIZE != 256)
89 #warning Currently any ddr size other than 256 is not supported
92 #if ((CONFIG_SYS_SDRAM_BASE & 0x00FFFFFF) != 0)
93 #warning Chip select bounds is only configurable in 16MB increments
95 im->ddr.csbnds[2].csbnds =
96 ((CONFIG_SYS_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
97 (((CONFIG_SYS_SDRAM_BASE + ddr_size - 1) >>
98 CSBNDS_EA_SHIFT) & CSBNDS_EA);
99 im->ddr.cs_config[2] = CONFIG_SYS_DDR_CS2_CONFIG;
101 /* currently we use only one CS, so disable the other banks */
102 im->ddr.cs_config[0] = 0;
103 im->ddr.cs_config[1] = 0;
104 im->ddr.cs_config[3] = 0;
106 im->ddr.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1;
107 im->ddr.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2;
111 #if defined(CONFIG_DDR_2T_TIMING)
114 | SDRAM_CFG_SDRAM_TYPE_DDR1;
115 #if defined (CONFIG_DDR_32BIT)
116 /* for 32-bit mode burst length is 8 */
117 im->ddr.sdram_cfg |= (SDRAM_CFG_32_BE | SDRAM_CFG_8_BE);
119 im->ddr.sdram_mode = CONFIG_SYS_DDR_MODE;
121 im->ddr.sdram_interval = CONFIG_SYS_DDR_INTERVAL;
124 /* enable DDR controller */
125 im->ddr.sdram_cfg |= SDRAM_CFG_MEM_EN;
128 #endif/*!CONFIG_SYS_SPD_EEPROM*/
131 int checkboard (void)
133 puts("Board: Wind River SBC834x\n");
138 * if board is fitted with SDRAM
140 #if defined(CONFIG_SYS_BR2_PRELIM) \
141 && defined(CONFIG_SYS_OR2_PRELIM) \
142 && defined(CONFIG_SYS_LBLAWBAR2_PRELIM) \
143 && defined(CONFIG_SYS_LBLAWAR2_PRELIM)
145 * Initialize SDRAM memory on the Local Bus.
148 void sdram_init(void)
150 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
151 volatile fsl_lbc_t *lbc = &immap->im_lbc;
152 uint *sdram_addr = (uint *)CONFIG_SYS_LBC_SDRAM_BASE;
153 const u32 lsdmr_common = LSDMR_RFEN | LSDMR_BSMA1516 | LSDMR_RFCR8 |
154 LSDMR_PRETOACT6 | LSDMR_ACTTORW3 | LSDMR_BL8 |
155 LSDMR_WRC3 | LSDMR_CL3;
157 puts("\n SDRAM on Local Bus: ");
158 print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, "\n");
161 * Setup SDRAM Base and Option Registers, already done in cpu_init.c
164 /* setup mtrpt, lsrt and lbcr for LB bus */
165 lbc->lbcr = 0x00000000;
166 /* LB refresh timer prescal, 266MHz/32 */
167 lbc->mrtpr = 0x20000000;
168 /* LB sdram refresh timer, about 6us */
169 lbc->lsrt = 0x32000000;
173 * Configure the SDRAM controller Machine Mode Register.
175 /* 0x40636733; normal operation */
176 lbc->lsdmr = lsdmr_common | LSDMR_OP_NORMAL;
178 /* 0x68636733; precharge all the banks */
179 lbc->lsdmr = lsdmr_common | LSDMR_OP_PCHALL;
184 /* 0x48636733; auto refresh */
185 lbc->lsdmr = lsdmr_common | LSDMR_OP_ARFRSH;
212 /* 0x58636733; mode register write operation */
213 lbc->lsdmr = lsdmr_common | LSDMR_OP_MRW;
218 /* 0x40636733; normal operation */
219 lbc->lsdmr = lsdmr_common | LSDMR_OP_NORMAL;
225 void sdram_init(void)
227 puts(" SDRAM on Local Bus: Disabled in config\n");
231 #if defined(CONFIG_OF_BOARD_SETUP)
232 int ft_board_setup(void *blob, bd_t *bd)
234 ft_cpu_setup(blob, bd);
236 ft_pci_setup(blob, bd);