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_defs.h>
  32
  33 #define CPU             0
  34 #define DDR             1
  35 #define SRAM_REL        0xD2801000
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 #if defined(CONFIG_CMD_NET)
  40 static int i2c_read_mac(uchar *buffer);
  41 #endif
  42
  43 int dram_init(void)
  44 {
  45         /* Store complete RAM size and return */
  46         gd->ram_size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_MAXSIZE);
  47
  48         return 0;
  49 }
  50
  51 void dram_init_banksize(void)
  52 {
  53         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  54         gd->bd->bi_dram[0].size = gd->ram_size;
  55 }
  56
  57 int misc_init_r(void)
  58 {
  59 #if defined(CONFIG_CMD_NET)
  60         uchar mac_id[6];
  61
  62         if (!eth_getenv_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
  63                 eth_setenv_enetaddr("ethaddr", mac_id);
  64 #endif
  65         setenv("verify", "n");
  66
  67 #if defined(CONFIG_SPEAR_USBTTY)
  68         setenv("stdin", "usbtty");
  69         setenv("stdout", "usbtty");
  70         setenv("stderr", "usbtty");
  71 #endif
  72         return 0;
  73 }
  74
  75 #ifdef CONFIG_SPEAR_EMI
  76 struct cust_emi_para {
  77         unsigned int tap;
  78         unsigned int tsdp;
  79         unsigned int tdpw;
  80         unsigned int tdpr;
  81         unsigned int tdcs;
  82 };
  83
  84 /* EMI timing setting of m28w640hc of linux kernel */
  85 const struct cust_emi_para emi_timing_m28w640hc = {
  86         .tap = 0x10,
  87         .tsdp = 0x05,
  88         .tdpw = 0x0a,
  89         .tdpr = 0x0a,
  90         .tdcs = 0x05,
  91 };
  92
  93 /* EMI timing setting of bootrom */
  94 const struct cust_emi_para emi_timing_bootrom = {
  95         .tap = 0xf,
  96         .tsdp = 0x0,
  97         .tdpw = 0xff,
  98         .tdpr = 0x111,
  99         .tdcs = 0x02,
 100 };
 101
 102 void spear_emi_init(void)
 103 {
 104         const struct cust_emi_para *p = &emi_timing_m28w640hc;
 105         struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
 106         unsigned int cs;
 107         unsigned int val, tmp;
 108
 109         val = readl(CONFIG_SPEAR_RASBASE);
 110
 111         if (val & EMI_ACKMSK)
 112                 tmp = 0x3f;
 113         else
 114                 tmp = 0x0;
 115
 116         writel(tmp, &emi_regs_p->ack);
 117
 118         for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
 119                 writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
 120                 writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
 121                 writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
 122                 writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
 123                 writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
 124                 writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
 125                        &emi_regs_p->bank_regs[cs].control);
 126         }
 127 }
 128 #endif
 129
 130 int spear_board_init(ulong mach_type)
 131 {
 132         gd->bd->bi_arch_number = mach_type;
 133
 134         /* adress of boot parameters */
 135         gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
 136
 137 #ifdef CONFIG_SPEAR_EMI
 138         spear_emi_init();
 139 #endif
 140         return 0;
 141 }
 142
 143 #if defined(CONFIG_CMD_NET)
 144 static int i2c_read_mac(uchar *buffer)
 145 {
 146         u8 buf[2];
 147
 148         i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
 149
 150         /* Check if mac in i2c memory is valid */
 151         if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
 152                 /* Valid mac address is saved in i2c eeprom */
 153                 i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
 154                 return 0;
 155         }
 156
 157         return -1;
 158 }
 159
 160 static int write_mac(uchar *mac)
 161 {
 162         u8 buf[2];
 163
 164         buf[0] = (u8)MAGIC_BYTE0;
 165         buf[1] = (u8)MAGIC_BYTE1;
 166         i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
 167
 168         buf[0] = (u8)~MAGIC_BYTE0;
 169         buf[1] = (u8)~MAGIC_BYTE1;
 170
 171         i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
 172
 173         /* check if valid MAC address is saved in I2C EEPROM or not? */
 174         if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
 175                 i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
 176                 puts("I2C EEPROM written with mac address \n");
 177                 return 0;
 178         }
 179
 180         puts("I2C EEPROM writing failed\n");
 181         return -1;
 182 }
 183 #endif
 184
 185 int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 186 {
 187         void (*sram_setfreq) (unsigned int, unsigned int);
 188         unsigned int frequency;
 189 #if defined(CONFIG_CMD_NET)
 190         unsigned char mac[6];
 191 #endif
 192
 193         if ((argc > 3) || (argc < 2))
 194                 return cmd_usage(cmdtp);
 195
 196         if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
 197
 198                 frequency = simple_strtoul(argv[2], NULL, 0);
 199
 200                 if (frequency > 333) {
 201                         printf("Frequency is limited to 333MHz\n");
 202                         return 1;
 203                 }
 204
 205                 sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
 206
 207                 if (!strcmp(argv[1], "cpufreq")) {
 208                         sram_setfreq(CPU, frequency);
 209                         printf("CPU frequency changed to %u\n", frequency);
 210                 } else {
 211                         sram_setfreq(DDR, frequency);
 212                         printf("DDR frequency changed to %u\n", frequency);
 213                 }
 214
 215                 return 0;
 216
 217 #if defined(CONFIG_CMD_NET)
 218         } else if (!strcmp(argv[1], "ethaddr")) {
 219
 220                 u32 reg;
 221                 char *e, *s = argv[2];
 222                 for (reg = 0; reg < 6; ++reg) {
 223                         mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
 224                         if (s)
 225                                 s = (*e) ? e + 1 : e;
 226                 }
 227                 write_mac(mac);
 228
 229                 return 0;
 230 #endif
 231         } else if (!strcmp(argv[1], "print")) {
 232 #if defined(CONFIG_CMD_NET)
 233                 if (!i2c_read_mac(mac)) {
 234                         printf("Ethaddr (from i2c mem) = %pM\n", mac);
 235                 } else {
 236                         printf("Ethaddr (from i2c mem) = Not set\n");
 237                 }
 238 #endif
 239                 return 0;
 240         }
 241
 242         return cmd_usage(cmdtp);
 243 }
 244
 245 U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
 246            "configure chip",
 247            "chip_config cpufreq/ddrfreq frequency\n"
 248 #if defined(CONFIG_CMD_NET)
 249            "chip_config ethaddr XX:XX:XX:XX:XX:XX\n"
 250 #endif
 251            "chip_config print");