board/siemens/taurus/taurus.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Board functions for Siemens TAURUS (AT91SAM9G20) based boards
   4  * (C) Copyright Siemens AG
   5  *
   6  * Based on:
   7  * U-Boot file: board/atmel/at91sam9260ek/at91sam9260ek.c
   8  *
   9  * (C) Copyright 2007-2008
  10  * Stelian Pop <stelian@popies.net>
  11  * Lead Tech Design <www.leadtechdesign.com>
  12  */
  13
  14 #include <command.h>
  15 #include <common.h>
  16 #include <dm.h>
  17 #include <env.h>
  18 #include <flash.h>
  19 #include <init.h>
  20 #include <asm/io.h>
  21 #include <asm/arch/at91sam9260_matrix.h>
  22 #include <asm/arch/at91sam9_smc.h>
  23 #include <asm/arch/at91_common.h>
  24 #include <asm/arch/at91_rstc.h>
  25 #include <asm/arch/gpio.h>
  26 #include <asm/arch/at91sam9_sdramc.h>
  27 #include <asm/arch/atmel_serial.h>
  28 #include <asm/arch/clk.h>
  29 #include <asm/gpio.h>
  30 #include <linux/mtd/rawnand.h>
  31 #include <atmel_mci.h>
  32 #include <asm/arch/at91_spi.h>
  33 #include <spi.h>
  34
  35 #include <net.h>
  36 #ifndef CONFIG_DM_ETH
  37 #include <netdev.h>
  38 #endif
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 static void taurus_request_gpio(void)
  43 {
  44         gpio_request(CONFIG_SYS_NAND_ENABLE_PIN, "nand ena");
  45         gpio_request(CONFIG_SYS_NAND_READY_PIN, "nand rdy");
  46         gpio_request(AT91_PIN_PA25, "ena PHY");
  47 }
  48
  49 static void taurus_nand_hw_init(void)
  50 {
  51         struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
  52         struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
  53         unsigned long csa;
  54
  55         /* Assign CS3 to NAND/SmartMedia Interface */
  56         csa = readl(&matrix->ebicsa);
  57         csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA;
  58         writel(csa, &matrix->ebicsa);
  59
  60         /* Configure SMC CS3 for NAND/SmartMedia */
  61         writel(AT91_SMC_SETUP_NWE(2) | AT91_SMC_SETUP_NCS_WR(0) |
  62                AT91_SMC_SETUP_NRD(2) | AT91_SMC_SETUP_NCS_RD(0),
  63                &smc->cs[3].setup);
  64         writel(AT91_SMC_PULSE_NWE(4) | AT91_SMC_PULSE_NCS_WR(3) |
  65                AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(3),
  66                &smc->cs[3].pulse);
  67         writel(AT91_SMC_CYCLE_NWE(7) | AT91_SMC_CYCLE_NRD(7),
  68                &smc->cs[3].cycle);
  69         writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
  70                AT91_SMC_MODE_EXNW_DISABLE |
  71                AT91_SMC_MODE_DBW_8 |
  72                AT91_SMC_MODE_TDF_CYCLE(3),
  73                &smc->cs[3].mode);
  74
  75         /* Configure RDY/BSY */
  76         at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
  77
  78         /* Enable NandFlash */
  79         at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
  80 }
  81
  82 #if defined(CONFIG_SPL_BUILD)
  83 #include <spl.h>
  84 #include <nand.h>
  85 #include <spi_flash.h>
  86
  87 void matrix_init(void)
  88 {
  89         struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX;
  90
  91         writel((readl(&mat->scfg[3]) & (~AT91_MATRIX_SLOT_CYCLE))
  92                         | AT91_MATRIX_SLOT_CYCLE_(0x40),
  93                         &mat->scfg[3]);
  94 }
  95
  96 #if defined(CONFIG_BOARD_AXM)
  97 static int at91_is_recovery(void)
  98 {
  99         if ((at91_get_gpio_value(AT91_PIN_PA26) == 0) &&
 100             (at91_get_gpio_value(AT91_PIN_PA27) == 0))
 101                 return 1;
 102
 103         return 0;
 104 }
 105 #elif defined(CONFIG_BOARD_TAURUS)
 106 static int at91_is_recovery(void)
 107 {
 108         if (at91_get_gpio_value(AT91_PIN_PA31) == 0)
 109                 return 1;
 110
 111         return 0;
 112 }
 113 #endif
 114
 115 void spl_board_init(void)
 116 {
 117         taurus_nand_hw_init();
 118         at91_spi0_hw_init(TAURUS_SPI_MASK);
 119
 120 #if defined(CONFIG_BOARD_AXM)
 121         /* Configure LED PINs */
 122         at91_set_gpio_output(AT91_PIN_PA6, 0);
 123         at91_set_gpio_output(AT91_PIN_PA8, 0);
 124         at91_set_gpio_output(AT91_PIN_PA9, 0);
 125         at91_set_gpio_output(AT91_PIN_PA10, 0);
 126         at91_set_gpio_output(AT91_PIN_PA11, 0);
 127         at91_set_gpio_output(AT91_PIN_PA12, 0);
 128
 129         /* Configure recovery button PINs */
 130         at91_set_gpio_input(AT91_PIN_PA26, 1);
 131         at91_set_gpio_input(AT91_PIN_PA27, 1);
 132 #elif defined(CONFIG_BOARD_TAURUS)
 133         at91_set_gpio_input(AT91_PIN_PA31, 1);
 134 #endif
 135
 136         /* check for recovery mode */
 137         if (at91_is_recovery() == 1) {
 138                 struct spi_flash *flash;
 139
 140                 puts("Recovery button pressed\n");
 141                 nand_init();
 142                 spl_nand_erase_one(0, 0);
 143                 flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
 144                                         0,
 145                                         CONFIG_SF_DEFAULT_SPEED,
 146                                         CONFIG_SF_DEFAULT_MODE);
 147                 if (!flash) {
 148                         puts("no flash\n");
 149                 } else {
 150                         puts("erase spi flash sector 0\n");
 151                         spi_flash_erase(flash, 0,
 152                                         CONFIG_SYS_NAND_U_BOOT_SIZE);
 153                 }
 154         }
 155 }
 156
 157 #define SDRAM_BASE_CONF (AT91_SDRAMC_NR_13 | AT91_SDRAMC_CAS_3 \
 158                          |AT91_SDRAMC_NB_4 | AT91_SDRAMC_DBW_32 \
 159                          | AT91_SDRAMC_TWR_VAL(3) | AT91_SDRAMC_TRC_VAL(9) \
 160                          | AT91_SDRAMC_TRP_VAL(3) | AT91_SDRAMC_TRCD_VAL(3) \
 161                          | AT91_SDRAMC_TRAS_VAL(6) | AT91_SDRAMC_TXSR_VAL(10))
 162
 163 void sdramc_configure(unsigned int mask)
 164 {
 165         struct at91_matrix *ma = (struct at91_matrix *)ATMEL_BASE_MATRIX;
 166         struct sdramc_reg setting;
 167
 168         at91_sdram_hw_init();
 169         setting.cr = SDRAM_BASE_CONF | mask;
 170         setting.mdr = AT91_SDRAMC_MD_SDRAM;
 171         setting.tr = (CONFIG_SYS_MASTER_CLOCK * 7) / 1000000;
 172
 173         writel(readl(&ma->ebicsa) | AT91_MATRIX_CS1A_SDRAMC |
 174                 AT91_MATRIX_VDDIOMSEL_3_3V | AT91_MATRIX_EBI_IOSR_SEL,
 175                 &ma->ebicsa);
 176
 177         sdramc_initialize(ATMEL_BASE_CS1, &setting);
 178 }
 179
 180 void mem_init(void)
 181 {
 182         unsigned int ram_size = 0;
 183
 184         /* Configure SDRAM for 128MB */
 185         sdramc_configure(AT91_SDRAMC_NC_10);
 186
 187         /* Do memtest for 128MB */
 188         ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
 189                                 CONFIG_SYS_SDRAM_SIZE);
 190
 191         /*
 192          * If 32MB or 16MB should be supported check also for
 193          * expected mirroring at A16 and A17
 194          * To find mirror addresses depends how the collumns are connected
 195          * at RAM (internaly or externaly)
 196          * If the collumns are not in inverted order the mirror size effect
 197          * behaves like normal SRAM with A0,A1,A2,etc. connected incremantal
 198          */
 199
 200         /* Mirrors at A15 on ATMEL G20 SDRAM Controller with 64MB*/
 201         if (ram_size == 0x800) {
 202                 printf("\n\r 64MB\n");
 203                 sdramc_configure(AT91_SDRAMC_NC_9);
 204         } else {
 205                 /* Size already initialized */
 206                 printf("\n\r 128MB\n");
 207         }
 208 }
 209 #endif
 210
 211 #ifdef CONFIG_MACB
 212 static void siemens_phy_reset(void)
 213 {
 214         /*
 215          * we need to reset PHY for 200us
 216          * because of bug in ATMEL G20 CPU (undefined initial state of GPIO)
 217          */
 218         if ((readl(AT91_ASM_RSTC_SR) & AT91_RSTC_RSTTYP) ==
 219             AT91_RSTC_RSTTYP_GENERAL)
 220                 at91_set_gpio_value(AT91_PIN_PA25, 0); /* reset eth switch */
 221 }
 222
 223 static void taurus_macb_hw_init(void)
 224 {
 225         /* Enable EMAC clock */
 226         at91_periph_clk_enable(ATMEL_ID_EMAC0);
 227
 228         /*
 229          * Disable pull-up on:
 230          *      RXDV (PA17) => PHY normal mode (not Test mode)
 231          *      ERX0 (PA14) => PHY ADDR0
 232          *      ERX1 (PA15) => PHY ADDR1
 233          *      ERX2 (PA25) => PHY ADDR2
 234          *      ERX3 (PA26) => PHY ADDR3
 235          *      ECRS (PA28) => PHY ADDR4  => PHYADDR = 0x0
 236          *
 237          * PHY has internal pull-down
 238          */
 239         at91_set_pio_pullup(AT91_PIO_PORTA, 14, 0);
 240         at91_set_pio_pullup(AT91_PIO_PORTA, 15, 0);
 241         at91_set_pio_pullup(AT91_PIO_PORTA, 17, 0);
 242         at91_set_pio_pullup(AT91_PIO_PORTA, 25, 0);
 243         at91_set_pio_pullup(AT91_PIO_PORTA, 26, 0);
 244         at91_set_pio_pullup(AT91_PIO_PORTA, 28, 0);
 245
 246         siemens_phy_reset();
 247
 248         at91_phy_reset();
 249
 250         at91_set_gpio_input(AT91_PIN_PA25, 1);   /* ERST tri-state */
 251
 252         /* Re-enable pull-up */
 253         at91_set_pio_pullup(AT91_PIO_PORTA, 14, 1);
 254         at91_set_pio_pullup(AT91_PIO_PORTA, 15, 1);
 255         at91_set_pio_pullup(AT91_PIO_PORTA, 17, 1);
 256         at91_set_pio_pullup(AT91_PIO_PORTA, 25, 1);
 257         at91_set_pio_pullup(AT91_PIO_PORTA, 26, 1);
 258         at91_set_pio_pullup(AT91_PIO_PORTA, 28, 1);
 259
 260         /* Initialize EMAC=MACB hardware */
 261         at91_macb_hw_init();
 262 }
 263 #endif
 264
 265 #ifdef CONFIG_GENERIC_ATMEL_MCI
 266 int board_mmc_init(bd_t *bd)
 267 {
 268         at91_mci_hw_init();
 269
 270         return atmel_mci_init((void *)ATMEL_BASE_MCI);
 271 }
 272 #endif
 273
 274 int board_early_init_f(void)
 275 {
 276         /* Enable clocks for all PIOs */
 277         at91_periph_clk_enable(ATMEL_ID_PIOA);
 278         at91_periph_clk_enable(ATMEL_ID_PIOB);
 279         at91_periph_clk_enable(ATMEL_ID_PIOC);
 280
 281         at91_seriald_hw_init();
 282         taurus_request_gpio();
 283
 284         return 0;
 285 }
 286
 287 #ifdef CONFIG_USB_GADGET_AT91
 288 #include <linux/usb/at91_udc.h>
 289
 290 void at91_udp_hw_init(void)
 291 {
 292         /* Enable PLLB */
 293         at91_pllb_clk_enable(get_pllb_init());
 294
 295         /* Enable UDPCK clock, MCK is enabled in at91_clock_init() */
 296         at91_periph_clk_enable(ATMEL_ID_UDP);
 297
 298         at91_system_clk_enable(AT91SAM926x_PMC_UDP);
 299 }
 300
 301 struct at91_udc_data board_udc_data  = {
 302         .baseaddr = ATMEL_BASE_UDP0,
 303 };
 304 #endif
 305
 306 int board_init(void)
 307 {
 308         /* adress of boot parameters */
 309         gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 310
 311         taurus_request_gpio();
 312 #ifdef CONFIG_CMD_NAND
 313         taurus_nand_hw_init();
 314 #endif
 315 #ifdef CONFIG_MACB
 316         taurus_macb_hw_init();
 317 #endif
 318         at91_spi0_hw_init(TAURUS_SPI_MASK);
 319 #ifdef CONFIG_USB_GADGET_AT91
 320         at91_udp_hw_init();
 321         at91_udc_probe(&board_udc_data);
 322 #endif
 323
 324         return 0;
 325 }
 326
 327 int dram_init(void)
 328 {
 329         gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
 330                                     CONFIG_SYS_SDRAM_SIZE);
 331         return 0;
 332 }
 333
 334 #if !defined(CONFIG_SPL_BUILD)
 335 #if defined(CONFIG_BOARD_AXM)
 336 /*
 337  * Booting the Fallback Image.
 338  *
 339  *  The function is used to provide and
 340  *  boot the image with the fallback
 341  *  parameters, incase if the faulty image
 342  *  in upgraded over the base firmware.
 343  *
 344  */
 345 static int upgrade_failure_fallback(void)
 346 {
 347         char *partitionset_active = NULL;
 348         char *rootfs = NULL;
 349         char *rootfs_fallback = NULL;
 350         char *kern_off;
 351         char *kern_off_fb;
 352         char *kern_size;
 353         char *kern_size_fb;
 354
 355         partitionset_active = env_get("partitionset_active");
 356         if (partitionset_active) {
 357                 if (partitionset_active[0] == 'A')
 358                         env_set("partitionset_active", "B");
 359                 else
 360                         env_set("partitionset_active", "A");
 361         } else {
 362                 printf("partitionset_active missing.\n");
 363                 return -ENOENT;
 364         }
 365
 366         rootfs = env_get("rootfs");
 367         rootfs_fallback = env_get("rootfs_fallback");
 368         env_set("rootfs", rootfs_fallback);
 369         env_set("rootfs_fallback", rootfs);
 370
 371         kern_size = env_get("kernel_size");
 372         kern_size_fb = env_get("kernel_size_fallback");
 373         env_set("kernel_size", kern_size_fb);
 374         env_set("kernel_size_fallback", kern_size);
 375
 376         kern_off = env_get("kernel_Off");
 377         kern_off_fb = env_get("kernel_Off_fallback");
 378         env_set("kernel_Off", kern_off_fb);
 379         env_set("kernel_Off_fallback", kern_off);
 380
 381         env_set("bootargs", '\0');
 382         env_set("upgrade_available", '\0');
 383         env_set("boot_retries", '\0');
 384         env_save();
 385
 386         return 0;
 387 }
 388
 389 static int do_upgrade_available(cmd_tbl_t *cmdtp, int flag, int argc,
 390                         char * const argv[])
 391 {
 392         unsigned long upgrade_available = 0;
 393         unsigned long boot_retry = 0;
 394         char boot_buf[10];
 395
 396         upgrade_available = simple_strtoul(env_get("upgrade_available"), NULL,
 397                                            10);
 398         if (upgrade_available) {
 399                 boot_retry = simple_strtoul(env_get("boot_retries"), NULL, 10);
 400                 boot_retry++;
 401                 sprintf(boot_buf, "%lx", boot_retry);
 402                 env_set("boot_retries", boot_buf);
 403                 env_save();
 404
 405                 /*
 406                  * Here the boot_retries count is checked, and if the
 407                  * count becomes greater than 2 switch back to the
 408                  * fallback, and reset the board.
 409                  */
 410
 411                 if (boot_retry > 2) {
 412                         if (upgrade_failure_fallback() == 0)
 413                                 do_reset(NULL, 0, 0, NULL);
 414                         return -1;
 415                 }
 416         }
 417         return 0;
 418 }
 419
 420 U_BOOT_CMD(
 421         upgrade_available,      1,      1,      do_upgrade_available,
 422         "check Siemens update",
 423         "no parameters"
 424 );
 425 #endif
 426 #endif