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 (at) 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 <environment.h> 18 #include <asm/io.h> 19 #include <asm/arch/at91sam9260_matrix.h> 20 #include <asm/arch/at91sam9_smc.h> 21 #include <asm/arch/at91_common.h> 22 #include <asm/arch/at91_rstc.h> 23 #include <asm/arch/gpio.h> 24 #include <asm/arch/at91sam9_sdramc.h> 25 #include <asm/arch/atmel_serial.h> 26 #include <asm/arch/clk.h> 27 #include <asm/gpio.h> 28 #include <linux/mtd/rawnand.h> 29 #include <atmel_mci.h> 30 #include <asm/arch/at91_spi.h> 31 #include <spi.h> 32 33 #include <net.h> 34 #ifndef CONFIG_DM_ETH 35 #include <netdev.h> 36 #endif 37 38 DECLARE_GLOBAL_DATA_PTR; 39 40 static void taurus_request_gpio(void) 41 { 42 gpio_request(CONFIG_SYS_NAND_ENABLE_PIN, "nand ena"); 43 gpio_request(CONFIG_SYS_NAND_READY_PIN, "nand rdy"); 44 gpio_request(AT91_PIN_PA25, "ena PHY"); 45 } 46 47 static void taurus_nand_hw_init(void) 48 { 49 struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC; 50 struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX; 51 unsigned long csa; 52 53 /* Assign CS3 to NAND/SmartMedia Interface */ 54 csa = readl(&matrix->ebicsa); 55 csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA; 56 writel(csa, &matrix->ebicsa); 57 58 /* Configure SMC CS3 for NAND/SmartMedia */ 59 writel(AT91_SMC_SETUP_NWE(2) | AT91_SMC_SETUP_NCS_WR(0) | 60 AT91_SMC_SETUP_NRD(2) | AT91_SMC_SETUP_NCS_RD(0), 61 &smc->cs[3].setup); 62 writel(AT91_SMC_PULSE_NWE(4) | AT91_SMC_PULSE_NCS_WR(3) | 63 AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(3), 64 &smc->cs[3].pulse); 65 writel(AT91_SMC_CYCLE_NWE(7) | AT91_SMC_CYCLE_NRD(7), 66 &smc->cs[3].cycle); 67 writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE | 68 AT91_SMC_MODE_EXNW_DISABLE | 69 AT91_SMC_MODE_DBW_8 | 70 AT91_SMC_MODE_TDF_CYCLE(3), 71 &smc->cs[3].mode); 72 73 /* Configure RDY/BSY */ 74 at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1); 75 76 /* Enable NandFlash */ 77 at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1); 78 } 79 80 #if defined(CONFIG_SPL_BUILD) 81 #include <spl.h> 82 #include <nand.h> 83 #include <spi_flash.h> 84 85 void matrix_init(void) 86 { 87 struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX; 88 89 writel((readl(&mat->scfg[3]) & (~AT91_MATRIX_SLOT_CYCLE)) 90 | AT91_MATRIX_SLOT_CYCLE_(0x40), 91 &mat->scfg[3]); 92 } 93 94 #if defined(CONFIG_BOARD_AXM) 95 static int at91_is_recovery(void) 96 { 97 if ((at91_get_gpio_value(AT91_PIN_PA26) == 0) && 98 (at91_get_gpio_value(AT91_PIN_PA27) == 0)) 99 return 1; 100 101 return 0; 102 } 103 #elif defined(CONFIG_BOARD_TAURUS) 104 static int at91_is_recovery(void) 105 { 106 if (at91_get_gpio_value(AT91_PIN_PA31) == 0) 107 return 1; 108 109 return 0; 110 } 111 #endif 112 113 void spl_board_init(void) 114 { 115 taurus_nand_hw_init(); 116 at91_spi0_hw_init(TAURUS_SPI_MASK); 117 118 #if defined(CONFIG_BOARD_AXM) 119 /* Configure LED PINs */ 120 at91_set_gpio_output(AT91_PIN_PA6, 0); 121 at91_set_gpio_output(AT91_PIN_PA8, 0); 122 at91_set_gpio_output(AT91_PIN_PA9, 0); 123 at91_set_gpio_output(AT91_PIN_PA10, 0); 124 at91_set_gpio_output(AT91_PIN_PA11, 0); 125 at91_set_gpio_output(AT91_PIN_PA12, 0); 126 127 /* Configure recovery button PINs */ 128 at91_set_gpio_input(AT91_PIN_PA26, 1); 129 at91_set_gpio_input(AT91_PIN_PA27, 1); 130 #elif defined(CONFIG_BOARD_TAURUS) 131 at91_set_gpio_input(AT91_PIN_PA31, 1); 132 #endif 133 134 /* check for recovery mode */ 135 if (at91_is_recovery() == 1) { 136 struct spi_flash *flash; 137 138 puts("Recovery button pressed\n"); 139 nand_init(); 140 spl_nand_erase_one(0, 0); 141 flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS, 142 0, 143 CONFIG_SF_DEFAULT_SPEED, 144 CONFIG_SF_DEFAULT_MODE); 145 if (!flash) { 146 puts("no flash\n"); 147 } else { 148 puts("erase spi flash sector 0\n"); 149 spi_flash_erase(flash, 0, 150 CONFIG_SYS_NAND_U_BOOT_SIZE); 151 } 152 } 153 } 154 155 #define SDRAM_BASE_CONF (AT91_SDRAMC_NR_13 | AT91_SDRAMC_CAS_3 \ 156 |AT91_SDRAMC_NB_4 | AT91_SDRAMC_DBW_32 \ 157 | AT91_SDRAMC_TWR_VAL(3) | AT91_SDRAMC_TRC_VAL(9) \ 158 | AT91_SDRAMC_TRP_VAL(3) | AT91_SDRAMC_TRCD_VAL(3) \ 159 | AT91_SDRAMC_TRAS_VAL(6) | AT91_SDRAMC_TXSR_VAL(10)) 160 161 void sdramc_configure(unsigned int mask) 162 { 163 struct at91_matrix *ma = (struct at91_matrix *)ATMEL_BASE_MATRIX; 164 struct sdramc_reg setting; 165 166 at91_sdram_hw_init(); 167 setting.cr = SDRAM_BASE_CONF | mask; 168 setting.mdr = AT91_SDRAMC_MD_SDRAM; 169 setting.tr = (CONFIG_SYS_MASTER_CLOCK * 7) / 1000000; 170 171 writel(readl(&ma->ebicsa) | AT91_MATRIX_CS1A_SDRAMC | 172 AT91_MATRIX_VDDIOMSEL_3_3V | AT91_MATRIX_EBI_IOSR_SEL, 173 &ma->ebicsa); 174 175 sdramc_initialize(ATMEL_BASE_CS1, &setting); 176 } 177 178 void mem_init(void) 179 { 180 unsigned int ram_size = 0; 181 182 /* Configure SDRAM for 128MB */ 183 sdramc_configure(AT91_SDRAMC_NC_10); 184 185 /* Do memtest for 128MB */ 186 ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, 187 CONFIG_SYS_SDRAM_SIZE); 188 189 /* 190 * If 32MB or 16MB should be supported check also for 191 * expected mirroring at A16 and A17 192 * To find mirror addresses depends how the collumns are connected 193 * at RAM (internaly or externaly) 194 * If the collumns are not in inverted order the mirror size effect 195 * behaves like normal SRAM with A0,A1,A2,etc. connected incremantal 196 */ 197 198 /* Mirrors at A15 on ATMEL G20 SDRAM Controller with 64MB*/ 199 if (ram_size == 0x800) { 200 printf("\n\r 64MB"); 201 sdramc_configure(AT91_SDRAMC_NC_9); 202 } else { 203 /* Size already initialized */ 204 printf("\n\r 128MB"); 205 } 206 } 207 #endif 208 209 #ifdef CONFIG_MACB 210 static void siemens_phy_reset(void) 211 { 212 /* 213 * we need to reset PHY for 200us 214 * because of bug in ATMEL G20 CPU (undefined initial state of GPIO) 215 */ 216 if ((readl(AT91_ASM_RSTC_SR) & AT91_RSTC_RSTTYP) == 217 AT91_RSTC_RSTTYP_GENERAL) 218 at91_set_gpio_value(AT91_PIN_PA25, 0); /* reset eth switch */ 219 } 220 221 static void taurus_macb_hw_init(void) 222 { 223 /* Enable EMAC clock */ 224 at91_periph_clk_enable(ATMEL_ID_EMAC0); 225 226 /* 227 * Disable pull-up on: 228 * RXDV (PA17) => PHY normal mode (not Test mode) 229 * ERX0 (PA14) => PHY ADDR0 230 * ERX1 (PA15) => PHY ADDR1 231 * ERX2 (PA25) => PHY ADDR2 232 * ERX3 (PA26) => PHY ADDR3 233 * ECRS (PA28) => PHY ADDR4 => PHYADDR = 0x0 234 * 235 * PHY has internal pull-down 236 */ 237 at91_set_pio_pullup(AT91_PIO_PORTA, 14, 0); 238 at91_set_pio_pullup(AT91_PIO_PORTA, 15, 0); 239 at91_set_pio_pullup(AT91_PIO_PORTA, 17, 0); 240 at91_set_pio_pullup(AT91_PIO_PORTA, 25, 0); 241 at91_set_pio_pullup(AT91_PIO_PORTA, 26, 0); 242 at91_set_pio_pullup(AT91_PIO_PORTA, 28, 0); 243 244 siemens_phy_reset(); 245 246 at91_phy_reset(); 247 248 at91_set_gpio_input(AT91_PIN_PA25, 1); /* ERST tri-state */ 249 250 /* Re-enable pull-up */ 251 at91_set_pio_pullup(AT91_PIO_PORTA, 14, 1); 252 at91_set_pio_pullup(AT91_PIO_PORTA, 15, 1); 253 at91_set_pio_pullup(AT91_PIO_PORTA, 17, 1); 254 at91_set_pio_pullup(AT91_PIO_PORTA, 25, 1); 255 at91_set_pio_pullup(AT91_PIO_PORTA, 26, 1); 256 at91_set_pio_pullup(AT91_PIO_PORTA, 28, 1); 257 258 /* Initialize EMAC=MACB hardware */ 259 at91_macb_hw_init(); 260 } 261 #endif 262 263 #ifdef CONFIG_GENERIC_ATMEL_MCI 264 int board_mmc_init(bd_t *bd) 265 { 266 at91_mci_hw_init(); 267 268 return atmel_mci_init((void *)ATMEL_BASE_MCI); 269 } 270 #endif 271 272 int board_early_init_f(void) 273 { 274 /* Enable clocks for all PIOs */ 275 at91_periph_clk_enable(ATMEL_ID_PIOA); 276 at91_periph_clk_enable(ATMEL_ID_PIOB); 277 at91_periph_clk_enable(ATMEL_ID_PIOC); 278 279 at91_seriald_hw_init(); 280 taurus_request_gpio(); 281 282 return 0; 283 } 284 285 /* FIXME gpio code here need to handle through DM_GPIO */ 286 #ifndef CONFIG_DM_SPI 287 int spi_cs_is_valid(unsigned int bus, unsigned int cs) 288 { 289 return bus == 0 && cs == 0; 290 } 291 292 void spi_cs_activate(struct spi_slave *slave) 293 { 294 at91_set_gpio_value(TAURUS_SPI_CS_PIN, 0); 295 } 296 297 void spi_cs_deactivate(struct spi_slave *slave) 298 { 299 at91_set_gpio_value(TAURUS_SPI_CS_PIN, 1); 300 } 301 #endif 302 303 #ifdef CONFIG_USB_GADGET_AT91 304 #include <linux/usb/at91_udc.h> 305 306 void at91_udp_hw_init(void) 307 { 308 /* Enable PLLB */ 309 at91_pllb_clk_enable(get_pllb_init()); 310 311 /* Enable UDPCK clock, MCK is enabled in at91_clock_init() */ 312 at91_periph_clk_enable(ATMEL_ID_UDP); 313 314 at91_system_clk_enable(AT91SAM926x_PMC_UDP); 315 } 316 317 struct at91_udc_data board_udc_data = { 318 .baseaddr = ATMEL_BASE_UDP0, 319 }; 320 #endif 321 322 int board_init(void) 323 { 324 /* adress of boot parameters */ 325 gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100; 326 327 taurus_request_gpio(); 328 #ifdef CONFIG_CMD_NAND 329 taurus_nand_hw_init(); 330 #endif 331 #ifdef CONFIG_MACB 332 taurus_macb_hw_init(); 333 #endif 334 at91_spi0_hw_init(TAURUS_SPI_MASK); 335 #ifdef CONFIG_USB_GADGET_AT91 336 at91_udp_hw_init(); 337 at91_udc_probe(&board_udc_data); 338 #endif 339 340 return 0; 341 } 342 343 int dram_init(void) 344 { 345 gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, 346 CONFIG_SYS_SDRAM_SIZE); 347 return 0; 348 } 349 350 #ifndef CONFIG_DM_ETH 351 int board_eth_init(bd_t *bis) 352 { 353 int rc = 0; 354 #ifdef CONFIG_MACB 355 rc = macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, 0x00); 356 #endif 357 return rc; 358 } 359 #endif 360 361 #if !defined(CONFIG_SPL_BUILD) 362 #if defined(CONFIG_BOARD_AXM) 363 /* 364 * Booting the Fallback Image. 365 * 366 * The function is used to provide and 367 * boot the image with the fallback 368 * parameters, incase if the faulty image 369 * in upgraded over the base firmware. 370 * 371 */ 372 static int upgrade_failure_fallback(void) 373 { 374 char *partitionset_active = NULL; 375 char *rootfs = NULL; 376 char *rootfs_fallback = NULL; 377 char *kern_off; 378 char *kern_off_fb; 379 char *kern_size; 380 char *kern_size_fb; 381 382 partitionset_active = env_get("partitionset_active"); 383 if (partitionset_active) { 384 if (partitionset_active[0] == 'A') 385 env_set("partitionset_active", "B"); 386 else 387 env_set("partitionset_active", "A"); 388 } else { 389 printf("partitionset_active missing.\n"); 390 return -ENOENT; 391 } 392 393 rootfs = env_get("rootfs"); 394 rootfs_fallback = env_get("rootfs_fallback"); 395 env_set("rootfs", rootfs_fallback); 396 env_set("rootfs_fallback", rootfs); 397 398 kern_size = env_get("kernel_size"); 399 kern_size_fb = env_get("kernel_size_fallback"); 400 env_set("kernel_size", kern_size_fb); 401 env_set("kernel_size_fallback", kern_size); 402 403 kern_off = env_get("kernel_Off"); 404 kern_off_fb = env_get("kernel_Off_fallback"); 405 env_set("kernel_Off", kern_off_fb); 406 env_set("kernel_Off_fallback", kern_off); 407 408 env_set("bootargs", '\0'); 409 env_set("upgrade_available", '\0'); 410 env_set("boot_retries", '\0'); 411 env_save(); 412 413 return 0; 414 } 415 416 static int do_upgrade_available(cmd_tbl_t *cmdtp, int flag, int argc, 417 char * const argv[]) 418 { 419 unsigned long upgrade_available = 0; 420 unsigned long boot_retry = 0; 421 char boot_buf[10]; 422 423 upgrade_available = simple_strtoul(env_get("upgrade_available"), NULL, 424 10); 425 if (upgrade_available) { 426 boot_retry = simple_strtoul(env_get("boot_retries"), NULL, 10); 427 boot_retry++; 428 sprintf(boot_buf, "%lx", boot_retry); 429 env_set("boot_retries", boot_buf); 430 env_save(); 431 432 /* 433 * Here the boot_retries count is checked, and if the 434 * count becomes greater than 2 switch back to the 435 * fallback, and reset the board. 436 */ 437 438 if (boot_retry > 2) { 439 if (upgrade_failure_fallback() == 0) 440 do_reset(NULL, 0, 0, NULL); 441 return -1; 442 } 443 } 444 return 0; 445 } 446 447 U_BOOT_CMD( 448 upgrade_available, 1, 1, do_upgrade_available, 449 "check Siemens update", 450 "no parameters" 451 ); 452 #endif 453 #endif 454
