1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * sbc8349.c -- WindRiver SBC8349 board support. 4 * Copyright (c) 2006-2007 Wind River Systems, Inc. 5 * 6 * Paul Gortmaker <paul.gortmaker (at) windriver.com> 7 * Based on board/mpc8349emds/mpc8349emds.c (and previous 834x releases.) 8 */ 9 10 #include <common.h> 11 #include <ioports.h> 12 #include <mpc83xx.h> 13 #include <asm/mpc8349_pci.h> 14 #include <i2c.h> 15 #include <spd_sdram.h> 16 #include <miiphy.h> 17 #if defined(CONFIG_OF_LIBFDT) 18 #include <linux/libfdt.h> 19 #endif 20 21 DECLARE_GLOBAL_DATA_PTR; 22 23 int fixed_sdram(void); 24 void sdram_init(void); 25 26 #if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83xx) 27 void ddr_enable_ecc(unsigned int dram_size); 28 #endif 29 30 #ifdef CONFIG_BOARD_EARLY_INIT_F 31 int board_early_init_f (void) 32 { 33 return 0; 34 } 35 #endif 36 37 #define ns2clk(ns) (ns / (1000000000 / CONFIG_8349_CLKIN) + 1) 38 39 int dram_init(void) 40 { 41 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; 42 u32 msize = 0; 43 44 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im) 45 return -1; 46 47 /* DDR SDRAM - Main SODIMM */ 48 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_BASE & LAWBAR_BAR; 49 #if defined(CONFIG_SPD_EEPROM) 50 msize = spd_sdram(); 51 #else 52 msize = fixed_sdram(); 53 #endif 54 /* 55 * Initialize SDRAM if it is on local bus. 56 */ 57 sdram_init(); 58 59 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER) 60 /* 61 * Initialize and enable DDR ECC. 62 */ 63 ddr_enable_ecc(msize * 1024 * 1024); 64 #endif 65 /* set total bus SDRAM size(bytes) -- DDR */ 66 gd->ram_size = msize * 1024 * 1024; 67 68 return 0; 69 } 70 71 #if !defined(CONFIG_SPD_EEPROM) 72 /************************************************************************* 73 * fixed sdram init -- doesn't use serial presence detect. 74 ************************************************************************/ 75 int fixed_sdram(void) 76 { 77 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; 78 u32 msize = CONFIG_SYS_DDR_SIZE; 79 u32 ddr_size = msize << 20; /* DDR size in bytes */ 80 u32 ddr_size_log2 = __ilog2(msize); 81 82 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000; 83 im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE); 84 85 #if (CONFIG_SYS_DDR_SIZE != 256) 86 #warning Currently any ddr size other than 256 is not supported 87 #endif 88 89 #if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0) 90 #warning Chip select bounds is only configurable in 16MB increments 91 #endif 92 im->ddr.csbnds[2].csbnds = 93 ((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) | 94 (((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >> 95 CSBNDS_EA_SHIFT) & CSBNDS_EA); 96 im->ddr.cs_config[2] = CONFIG_SYS_DDR_CS2_CONFIG; 97 98 /* currently we use only one CS, so disable the other banks */ 99 im->ddr.cs_config[0] = 0; 100 im->ddr.cs_config[1] = 0; 101 im->ddr.cs_config[3] = 0; 102 103 im->ddr.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1; 104 im->ddr.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2; 105 106 im->ddr.sdram_cfg = 107 SDRAM_CFG_SREN 108 #if defined(CONFIG_DDR_2T_TIMING) 109 | SDRAM_CFG_2T_EN 110 #endif 111 | SDRAM_CFG_SDRAM_TYPE_DDR1; 112 #if defined (CONFIG_DDR_32BIT) 113 /* for 32-bit mode burst length is 8 */ 114 im->ddr.sdram_cfg |= (SDRAM_CFG_32_BE | SDRAM_CFG_8_BE); 115 #endif 116 im->ddr.sdram_mode = CONFIG_SYS_DDR_MODE; 117 118 im->ddr.sdram_interval = CONFIG_SYS_DDR_INTERVAL; 119 udelay(200); 120 121 /* enable DDR controller */ 122 im->ddr.sdram_cfg |= SDRAM_CFG_MEM_EN; 123 return msize; 124 } 125 #endif/*!CONFIG_SYS_SPD_EEPROM*/ 126 127 128 int checkboard (void) 129 { 130 puts("Board: Wind River SBC834x\n"); 131 return 0; 132 } 133 134 /* 135 * if board is fitted with SDRAM 136 */ 137 #if defined(CONFIG_SYS_BR2_PRELIM) \ 138 && defined(CONFIG_SYS_OR2_PRELIM) \ 139 && defined(CONFIG_SYS_LBLAWBAR2_PRELIM) \ 140 && defined(CONFIG_SYS_LBLAWAR2_PRELIM) 141 /* 142 * Initialize SDRAM memory on the Local Bus. 143 */ 144 145 void sdram_init(void) 146 { 147 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; 148 volatile fsl_lbc_t *lbc = &immap->im_lbc; 149 uint *sdram_addr = (uint *)CONFIG_SYS_LBC_SDRAM_BASE; 150 151 puts("\n SDRAM on Local Bus: "); 152 print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, "\n"); 153 154 /* 155 * Setup SDRAM Base and Option Registers, already done in cpu_init.c 156 */ 157 158 /* setup mtrpt, lsrt and lbcr for LB bus */ 159 lbc->lbcr = CONFIG_SYS_LBC_LBCR; 160 lbc->mrtpr = CONFIG_SYS_LBC_MRTPR; 161 lbc->lsrt = CONFIG_SYS_LBC_LSRT; 162 asm("sync"); 163 164 /* 165 * Configure the SDRAM controller Machine Mode Register. 166 */ 167 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_5; /* 0x40636733; normal operation */ 168 169 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_1; /* 0x68636733; precharge all the banks */ 170 asm("sync"); 171 *sdram_addr = 0xff; 172 udelay(100); 173 174 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_2; /* 0x48636733; auto refresh */ 175 asm("sync"); 176 /*1 times*/ 177 *sdram_addr = 0xff; 178 udelay(100); 179 /*2 times*/ 180 *sdram_addr = 0xff; 181 udelay(100); 182 /*3 times*/ 183 *sdram_addr = 0xff; 184 udelay(100); 185 /*4 times*/ 186 *sdram_addr = 0xff; 187 udelay(100); 188 /*5 times*/ 189 *sdram_addr = 0xff; 190 udelay(100); 191 /*6 times*/ 192 *sdram_addr = 0xff; 193 udelay(100); 194 /*7 times*/ 195 *sdram_addr = 0xff; 196 udelay(100); 197 /*8 times*/ 198 *sdram_addr = 0xff; 199 udelay(100); 200 201 /* 0x58636733; mode register write operation */ 202 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_4; 203 asm("sync"); 204 *sdram_addr = 0xff; 205 udelay(100); 206 207 lbc->lsdmr = CONFIG_SYS_LBC_LSDMR_5; /* 0x40636733; normal operation */ 208 asm("sync"); 209 *sdram_addr = 0xff; 210 udelay(100); 211 } 212 #else 213 void sdram_init(void) 214 { 215 puts(" SDRAM on Local Bus: Disabled in config\n"); 216 } 217 #endif 218 219 #if defined(CONFIG_OF_BOARD_SETUP) 220 int ft_board_setup(void *blob, bd_t *bd) 221 { 222 ft_cpu_setup(blob, bd); 223 #ifdef CONFIG_PCI 224 ft_pci_setup(blob, bd); 225 #endif 226 227 return 0; 228 } 229 #endif 230
