board/spear/common/spr_misc.c

   1 /*
   2  * (C) Copyright 2009
   3  * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <i2c.h>
  27 #include <net.h>
  28 #include <asm/io.h>
  29 #include <asm/arch/hardware.h>
  30 #include <asm/arch/spr_emi.h>
  31 #include <asm/arch/spr_xloader_table.h>
  32 #include <asm/arch/spr_defs.h>
  33
  34 #define CPU             0
  35 #define DDR             1
  36 #define SRAM_REL        0xD2801000
  37
  38 DECLARE_GLOBAL_DATA_PTR;
  39 static struct chip_data chip_data;
  40
  41 int dram_init(void)
  42 {
  43         struct xloader_table *xloader_tb =
  44             (struct xloader_table *)XLOADER_TABLE_ADDRESS;
  45         struct xloader_table_1_1 *table_1_1;
  46         struct xloader_table_1_2 *table_1_2;
  47         struct chip_data *chip = &chip_data;
  48
  49         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  50         gd->bd->bi_dram[0].size = get_ram_size(PHYS_SDRAM_1,
  51                                                PHYS_SDRAM_1_MAXSIZE);
  52
  53         if (XLOADER_TABLE_VERSION_1_1 == xloader_tb->table_version) {
  54                 table_1_1 = &xloader_tb->table.table_1_1;
  55                 chip->dramfreq = table_1_1->ddrfreq;
  56                 chip->dramtype = table_1_1->ddrtype;
  57
  58         } else if (XLOADER_TABLE_VERSION_1_2 == xloader_tb->table_version) {
  59                 table_1_2 = &xloader_tb->table.table_1_2;
  60                 chip->dramfreq = table_1_2->ddrfreq;
  61                 chip->dramtype = table_1_2->ddrtype;
  62         } else {
  63                 chip->dramfreq = -1;
  64         }
  65
  66         return 0;
  67 }
  68
  69 int misc_init_r(void)
  70 {
  71 #if defined(CONFIG_CMD_NET)
  72         uchar mac_id[6];
  73
  74         if (!eth_getenv_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
  75                 eth_setenv_enetaddr("ethaddr", mac_id);
  76 #endif
  77         setenv("verify", "n");
  78
  79 #if defined(CONFIG_SPEAR_USBTTY)
  80         setenv("stdin", "usbtty");
  81         setenv("stdout", "usbtty");
  82         setenv("stderr", "usbtty");
  83 #endif
  84         return 0;
  85 }
  86
  87 #ifdef CONFIG_SPEAR_EMI
  88 struct cust_emi_para {
  89         unsigned int tap;
  90         unsigned int tsdp;
  91         unsigned int tdpw;
  92         unsigned int tdpr;
  93         unsigned int tdcs;
  94 };
  95
  96 /* EMI timing setting of m28w640hc of linux kernel */
  97 const struct cust_emi_para emi_timing_m28w640hc = {
  98         .tap = 0x10,
  99         .tsdp = 0x05,
 100         .tdpw = 0x0a,
 101         .tdpr = 0x0a,
 102         .tdcs = 0x05,
 103 };
 104
 105 /* EMI timing setting of bootrom */
 106 const struct cust_emi_para emi_timing_bootrom = {
 107         .tap = 0xf,
 108         .tsdp = 0x0,
 109         .tdpw = 0xff,
 110         .tdpr = 0x111,
 111         .tdcs = 0x02,
 112 };
 113
 114 void spear_emi_init(void)
 115 {
 116         const struct cust_emi_para *p = &emi_timing_m28w640hc;
 117         struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
 118         unsigned int cs;
 119         unsigned int val, tmp;
 120
 121         val = readl(CONFIG_SPEAR_RASBASE);
 122
 123         if (val & EMI_ACKMSK)
 124                 tmp = 0x3f;
 125         else
 126                 tmp = 0x0;
 127
 128         writel(tmp, &emi_regs_p->ack);
 129
 130         for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
 131                 writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
 132                 writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
 133                 writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
 134                 writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
 135                 writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
 136                 writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
 137                        &emi_regs_p->bank_regs[cs].control);
 138         }
 139 }
 140 #endif
 141
 142 int spear_board_init(ulong mach_type)
 143 {
 144         struct xloader_table *xloader_tb =
 145             (struct xloader_table *)XLOADER_TABLE_ADDRESS;
 146         struct xloader_table_1_2 *table_1_2;
 147         struct chip_data *chip = &chip_data;
 148
 149         gd->bd->bi_arch_number = mach_type;
 150
 151         /* adress of boot parameters */
 152         gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
 153
 154         /* CPU is initialized to work at 333MHz in Xloader */
 155         chip->cpufreq = 333;
 156
 157         if (XLOADER_TABLE_VERSION_1_2 == xloader_tb->table_version) {
 158                 table_1_2 = &xloader_tb->table.table_1_2;
 159                 memcpy(chip->version, table_1_2->version,
 160                        sizeof(chip->version));
 161         }
 162
 163 #ifdef CONFIG_SPEAR_EMI
 164         spear_emi_init();
 165 #endif
 166         return 0;
 167 }
 168
 169 static int i2c_read_mac(uchar *buffer)
 170 {
 171         u8 buf[2];
 172
 173         i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
 174
 175         /* Check if mac in i2c memory is valid */
 176         if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
 177                 /* Valid mac address is saved in i2c eeprom */
 178                 i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
 179                 return 0;
 180         }
 181
 182         return -1;
 183 }
 184
 185 static int write_mac(uchar *mac)
 186 {
 187         u8 buf[2];
 188
 189         buf[0] = (u8)MAGIC_BYTE0;
 190         buf[1] = (u8)MAGIC_BYTE1;
 191         i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
 192
 193         buf[0] = (u8)~MAGIC_BYTE0;
 194         buf[1] = (u8)~MAGIC_BYTE1;
 195
 196         i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
 197
 198         /* check if valid MAC address is saved in I2C EEPROM or not? */
 199         if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
 200                 i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
 201                 puts("I2C EEPROM written with mac address \n");
 202                 return 0;
 203         }
 204
 205         puts("I2C EEPROM writing failed \n");
 206         return -1;
 207 }
 208
 209 int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 210 {
 211         void (*sram_setfreq) (unsigned int, unsigned int);
 212         struct chip_data *chip = &chip_data;
 213         unsigned char mac[6];
 214         unsigned int reg, frequency;
 215         char *s, *e;
 216         char i2c_mac[20];
 217
 218         if ((argc > 3) || (argc < 2)) {
 219                 cmd_usage(cmdtp);
 220                 return 1;
 221         }
 222
 223         if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
 224
 225                 frequency = simple_strtoul(argv[2], NULL, 0);
 226
 227                 if (frequency > 333) {
 228                         printf("Frequency is limited to 333MHz\n");
 229                         return 1;
 230                 }
 231
 232                 sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
 233
 234                 if (!strcmp(argv[1], "cpufreq")) {
 235                         sram_setfreq(CPU, frequency);
 236                         printf("CPU frequency changed to %u\n", frequency);
 237
 238                         chip->cpufreq = frequency;
 239                 } else {
 240                         sram_setfreq(DDR, frequency);
 241                         printf("DDR frequency changed to %u\n", frequency);
 242
 243                         chip->dramfreq = frequency;
 244                 }
 245
 246                 return 0;
 247         } else if (!strcmp(argv[1], "ethaddr")) {
 248
 249                 s = argv[2];
 250                 for (reg = 0; reg < 6; ++reg) {
 251                         mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
 252                         if (s)
 253                                 s = (*e) ? e + 1 : e;
 254                 }
 255                 write_mac(mac);
 256
 257                 return 0;
 258         } else if (!strcmp(argv[1], "print")) {
 259
 260                 if (chip->cpufreq == -1)
 261                         printf("CPU Freq    = Not Known\n");
 262                 else
 263                         printf("CPU Freq    = %d MHz\n", chip->cpufreq);
 264
 265                 if (chip->dramfreq == -1)
 266                         printf("DDR Freq    = Not Known\n");
 267                 else
 268                         printf("DDR Freq    = %d MHz\n", chip->dramfreq);
 269
 270                 if (chip->dramtype == DDRMOBILE)
 271                         printf("DDR Type    = MOBILE\n");
 272                 else if (chip->dramtype == DDR2)
 273                         printf("DDR Type    = DDR2\n");
 274                 else
 275                         printf("DDR Type    = Not Known\n");
 276
 277                 if (!i2c_read_mac(mac)) {
 278                         sprintf(i2c_mac, "%pM", mac);
 279                         printf("Ethaddr (from i2c mem) = %s\n", i2c_mac);
 280                 } else {
 281                         printf("Ethaddr (from i2c mem) = Not set\n");
 282                 }
 283
 284                 printf("Xloader Rev = %s\n", chip->version);
 285
 286                 return 0;
 287         }
 288
 289         cmd_usage(cmdtp);
 290         return 1;
 291 }
 292
 293 U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
 294            "configure chip",
 295            "chip_config cpufreq/ddrfreq frequency\n"
 296            "chip_config print");