board/esd/meesc/meesc.c

   1 /*
   2  * (C) Copyright 2007-2008
   3  * Stelian Pop <stelian.pop@leadtechdesign.com>
   4  * Lead Tech Design <www.leadtechdesign.com>
   5  *
   6  * (C) Copyright 2009
   7  * Daniel Gorsulowski <daniel.gorsulowski@esd.eu>
   8  * esd electronic system design gmbh <www.esd.eu>
   9  *
  10  * See file CREDITS for list of people who contributed to this
  11  * project.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation; either version 2 of
  16  * the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26  * MA 02111-1307 USA
  27  */
  28
  29 #include <common.h>
  30 #include <asm/arch/at91sam9263.h>
  31 #include <asm/arch/at91sam9_matrix.h>
  32 #include <asm/arch/at91sam9_smc.h>
  33 #include <asm/arch/at91_common.h>
  34 #include <asm/arch/at91_pmc.h>
  35 #include <asm/arch/at91_rstc.h>
  36 #include <asm/arch/clk.h>
  37 #include <asm/arch/gpio.h>
  38 #include <asm/arch/hardware.h>
  39 #include <asm/arch/io.h>
  40 #include <netdev.h>
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 /*
  45  * Miscelaneous platform dependent initialisations
  46  */
  47
  48 static int hw_rev = -1; /* hardware revision */
  49
  50 int get_hw_rev(void)
  51 {
  52         if (hw_rev >= 0)
  53                 return hw_rev;
  54
  55         hw_rev = at91_get_gpio_value(AT91_PIN_PB19);
  56         hw_rev |= at91_get_gpio_value(AT91_PIN_PB20) << 1;
  57         hw_rev |= at91_get_gpio_value(AT91_PIN_PB21) << 2;
  58         hw_rev |= at91_get_gpio_value(AT91_PIN_PB22) << 3;
  59
  60         if (hw_rev == 15)
  61                 hw_rev = 0;
  62
  63         return hw_rev;
  64 }
  65
  66 #ifdef CONFIG_CMD_NAND
  67 static void meesc_nand_hw_init(void)
  68 {
  69         unsigned long csa;
  70
  71         /* Enable CS3 */
  72         csa = at91_sys_read(AT91_MATRIX_EBI0CSA);
  73         at91_sys_write(AT91_MATRIX_EBI0CSA,
  74                 csa | AT91_MATRIX_EBI0_CS3A_SMC_SMARTMEDIA);
  75
  76         /* Configure SMC CS3 for NAND/SmartMedia */
  77         at91_sys_write(AT91_SMC_SETUP(3),
  78                 AT91_SMC_NWESETUP_(1) | AT91_SMC_NCS_WRSETUP_(0) |
  79                 AT91_SMC_NRDSETUP_(1) | AT91_SMC_NCS_RDSETUP_(0));
  80         at91_sys_write(AT91_SMC_PULSE(3),
  81                 AT91_SMC_NWEPULSE_(3) | AT91_SMC_NCS_WRPULSE_(3) |
  82                 AT91_SMC_NRDPULSE_(3) | AT91_SMC_NCS_RDPULSE_(3));
  83         at91_sys_write(AT91_SMC_CYCLE(3),
  84                 AT91_SMC_NWECYCLE_(5) | AT91_SMC_NRDCYCLE_(5));
  85         at91_sys_write(AT91_SMC_MODE(3),
  86                 AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
  87                 AT91_SMC_EXNWMODE_DISABLE |
  88 #ifdef CONFIG_SYS_NAND_DBW_16
  89                 AT91_SMC_DBW_16 |
  90 #else /* CONFIG_SYS_NAND_DBW_8 */
  91                 AT91_SMC_DBW_8 |
  92 #endif
  93                 AT91_SMC_TDF_(2));
  94
  95         /* Configure RDY/BSY */
  96         at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
  97
  98         /* Enable NandFlash */
  99         at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
 100 }
 101 #endif /* CONFIG_CMD_NAND */
 102
 103 #ifdef CONFIG_MACB
 104 static void meesc_macb_hw_init(void)
 105 {
 106         /* Enable clock */
 107         at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9263_ID_EMAC);
 108         at91_macb_hw_init();
 109 }
 110 #endif
 111
 112 /*
 113  * Static memory controller initialization to enable Beckhoff ET1100 EtherCAT
 114  * controller debugging
 115  * The ET1100 is located at physical address 0x70000000
 116  * Its process memory is located at physical address 0x70001000
 117  */
 118 static void meesc_ethercat_hw_init(void)
 119 {
 120         /* Configure SMC EBI1_CS0 for EtherCAT */
 121         at91_sys_write(AT91_SMC1_SETUP(0),
 122                 AT91_SMC_NWESETUP_(0) | AT91_SMC_NCS_WRSETUP_(0) |
 123                 AT91_SMC_NRDSETUP_(0) | AT91_SMC_NCS_RDSETUP_(0));
 124         at91_sys_write(AT91_SMC1_PULSE(0),
 125                 AT91_SMC_NWEPULSE_(4) | AT91_SMC_NCS_WRPULSE_(9) |
 126                 AT91_SMC_NRDPULSE_(4) | AT91_SMC_NCS_RDPULSE_(9));
 127         at91_sys_write(AT91_SMC1_CYCLE(0),
 128                 AT91_SMC_NWECYCLE_(10) | AT91_SMC_NRDCYCLE_(5));
 129         /*
 130          * Configure behavior at external wait signal, byte-select mode, 16 bit
 131          * data bus width, none data float wait states and TDF optimization
 132          */
 133         at91_sys_write(AT91_SMC1_MODE(0),
 134                 AT91_SMC_READMODE | AT91_SMC_EXNWMODE_READY |
 135                 AT91_SMC_BAT_SELECT | AT91_SMC_DBW_16 | AT91_SMC_TDF_(0) |
 136                 AT91_SMC_TDFMODE);
 137
 138         /* Configure RDY/BSY */
 139         at91_set_B_periph(AT91_PIN_PE20, 0);    /* EBI1_NWAIT */
 140 }
 141
 142 int dram_init(void)
 143 {
 144         gd->bd->bi_dram[0].start = PHYS_SDRAM;
 145         gd->bd->bi_dram[0].size = get_ram_size((long *) PHYS_SDRAM, (1 << 27));
 146         return 0;
 147 }
 148
 149 int board_eth_init(bd_t *bis)
 150 {
 151         int rc = 0;
 152 #ifdef CONFIG_MACB
 153         rc = macb_eth_initialize(0, (void *)AT91SAM9263_BASE_EMAC, 0x00);
 154 #endif
 155         return rc;
 156 }
 157
 158 int checkboard(void)
 159 {
 160         char str[32];
 161         u_char hw_type; /* hardware type */
 162
 163         /* read the "Type" register of the ET1100 controller */
 164         hw_type = readb(CONFIG_ET1100_BASE);
 165
 166         switch (hw_type) {
 167         case 0x11:
 168         case 0x3F:
 169                 /* ET1100 present, arch number of MEESC-Board */
 170                 gd->bd->bi_arch_number = MACH_TYPE_MEESC;
 171                 puts("Board: CAN-EtherCAT Gateway");
 172                 break;
 173         case 0xFF:
 174                 /* no ET1100 present, arch number of EtherCAN/2-Board */
 175                 gd->bd->bi_arch_number = MACH_TYPE_ETHERCAN2;
 176                 puts("Board: EtherCAN/2 Gateway");
 177                 /* switch on LED1D */
 178                 at91_set_gpio_output(AT91_PIN_PB12, 1);
 179                 break;
 180         default:
 181                 /* assume, no ET1100 present, arch number of EtherCAN/2-Board */
 182                 gd->bd->bi_arch_number = MACH_TYPE_ETHERCAN2;
 183                 printf("ERROR! Read invalid hw_type: %02X\n", hw_type);
 184                 puts("Board: EtherCAN/2 Gateway");
 185                 break;
 186         }
 187         if (getenv_f("serial#", str, sizeof(str)) > 0) {
 188                 puts(", serial# ");
 189                 puts(str);
 190         }
 191         printf("\nHardware-revision: 1.%d\n", get_hw_rev());
 192         printf("Mach-type: %lu\n", gd->bd->bi_arch_number);
 193         return 0;
 194 }
 195
 196 #ifdef CONFIG_SERIAL_TAG
 197 void get_board_serial(struct tag_serialnr *serialnr)
 198 {
 199         char *str;
 200
 201         char *serial = getenv("serial#");
 202         if (serial) {
 203                 str = strchr(serial, '_');
 204                 if (str && (strlen(str) >= 4)) {
 205                         serialnr->high = (*(str + 1) << 8) | *(str + 2);
 206                         serialnr->low = simple_strtoul(str + 3, NULL, 16);
 207                 }
 208         } else {
 209                 serialnr->high = 0;
 210                 serialnr->low = 0;
 211         }
 212 }
 213 #endif
 214
 215 #ifdef CONFIG_REVISION_TAG
 216 u32 get_board_rev(void)
 217 {
 218         return hw_rev | 0x100;
 219 }
 220 #endif
 221
 222 #ifdef CONFIG_MISC_INIT_R
 223 int misc_init_r(void)
 224 {
 225         char *str;
 226         char buf[32];
 227
 228         /*
 229          * Normally the processor clock has a divisor of 2.
 230          * In some cases this this needs to be set to 4.
 231          * Check the user has set environment mdiv to 4 to change the divisor.
 232          */
 233         if ((str = getenv("mdiv")) && (strcmp(str, "4") == 0)) {
 234                 at91_sys_write(AT91_PMC_MCKR,
 235                         (at91_sys_read(AT91_PMC_MCKR) & ~AT91_PMC_MDIV) |
 236                         AT91SAM9_PMC_MDIV_4);
 237                 at91_clock_init(0);
 238                 serial_setbrg();
 239                 /* Notify the user that the clock is not default */
 240                 printf("Setting master clock to %s MHz\n",
 241                         strmhz(buf, get_mck_clk_rate()));
 242         }
 243
 244         return 0;
 245 }
 246 #endif /* CONFIG_MISC_INIT_R */
 247
 248 int board_init(void)
 249 {
 250         /* Peripheral Clock Enable Register */
 251         at91_sys_write(AT91_PMC_PCER,   1 << AT91SAM9263_ID_PIOA |
 252                                         1 << AT91SAM9263_ID_PIOB |
 253                                         1 << AT91SAM9263_ID_PIOCDE);
 254
 255         /* initialize ET1100 Controller */
 256         meesc_ethercat_hw_init();
 257
 258         /* adress of boot parameters */
 259         gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 260
 261         at91_serial_hw_init();
 262 #ifdef CONFIG_CMD_NAND
 263         meesc_nand_hw_init();
 264 #endif
 265 #ifdef CONFIG_HAS_DATAFLASH
 266         at91_spi0_hw_init(1 << 0);
 267 #endif
 268 #ifdef CONFIG_MACB
 269         meesc_macb_hw_init();
 270 #endif
 271 #ifdef CONFIG_AT91_CAN
 272         at91_can_hw_init();
 273 #endif
 274         return 0;
 275 }