arch/arm/cpu/armv7/omap3/board.c

   1 /*
   2  *
   3  * Common board functions for OMAP3 based boards.
   4  *
   5  * (C) Copyright 2004-2008
   6  * Texas Instruments, <www.ti.com>
   7  *
   8  * Author :
   9  *      Sunil Kumar <sunilsaini05@gmail.com>
  10  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
  11  *
  12  * Derived from Beagle Board and 3430 SDP code by
  13  *      Richard Woodruff <r-woodruff2@ti.com>
  14  *      Syed Mohammed Khasim <khasim@ti.com>
  15  *
  16  *
  17  * SPDX-License-Identifier:     GPL-2.0+
  18  */
  19 #include <common.h>
  20 #include <dm.h>
  21 #include <spl.h>
  22 #include <asm/io.h>
  23 #include <asm/arch/sys_proto.h>
  24 #include <asm/arch/mem.h>
  25 #include <asm/cache.h>
  26 #include <asm/armv7.h>
  27 #include <asm/gpio.h>
  28 #include <asm/omap_common.h>
  29 #include <linux/compiler.h>
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 /* Declarations */
  34 extern omap3_sysinfo sysinfo;
  35 #ifndef CONFIG_SYS_L2CACHE_OFF
  36 static void omap3_invalidate_l2_cache_secure(void);
  37 #endif
  38
  39 #ifdef CONFIG_DM_GPIO
  40 static const struct omap_gpio_platdata omap34xx_gpio[] = {
  41         { 0, OMAP34XX_GPIO1_BASE },
  42         { 1, OMAP34XX_GPIO2_BASE },
  43         { 2, OMAP34XX_GPIO3_BASE },
  44         { 3, OMAP34XX_GPIO4_BASE },
  45         { 4, OMAP34XX_GPIO5_BASE },
  46         { 5, OMAP34XX_GPIO6_BASE },
  47 };
  48
  49 U_BOOT_DEVICES(am33xx_gpios) = {
  50         { "gpio_omap", &omap34xx_gpio[0] },
  51         { "gpio_omap", &omap34xx_gpio[1] },
  52         { "gpio_omap", &omap34xx_gpio[2] },
  53         { "gpio_omap", &omap34xx_gpio[3] },
  54         { "gpio_omap", &omap34xx_gpio[4] },
  55         { "gpio_omap", &omap34xx_gpio[5] },
  56 };
  57
  58 #else
  59
  60 static const struct gpio_bank gpio_bank_34xx[6] = {
  61         { (void *)OMAP34XX_GPIO1_BASE },
  62         { (void *)OMAP34XX_GPIO2_BASE },
  63         { (void *)OMAP34XX_GPIO3_BASE },
  64         { (void *)OMAP34XX_GPIO4_BASE },
  65         { (void *)OMAP34XX_GPIO5_BASE },
  66         { (void *)OMAP34XX_GPIO6_BASE },
  67 };
  68
  69 const struct gpio_bank *const omap_gpio_bank = gpio_bank_34xx;
  70
  71 #endif
  72
  73 /******************************************************************************
  74  * Routine: secure_unlock
  75  * Description: Setup security registers for access
  76  *              (GP Device only)
  77  *****************************************************************************/
  78 void secure_unlock_mem(void)
  79 {
  80         struct pm *pm_rt_ape_base = (struct pm *)PM_RT_APE_BASE_ADDR_ARM;
  81         struct pm *pm_gpmc_base = (struct pm *)PM_GPMC_BASE_ADDR_ARM;
  82         struct pm *pm_ocm_ram_base = (struct pm *)PM_OCM_RAM_BASE_ADDR_ARM;
  83         struct pm *pm_iva2_base = (struct pm *)PM_IVA2_BASE_ADDR_ARM;
  84         struct sms *sms_base = (struct sms *)OMAP34XX_SMS_BASE;
  85
  86         /* Protection Module Register Target APE (PM_RT) */
  87         writel(UNLOCK_1, &pm_rt_ape_base->req_info_permission_1);
  88         writel(UNLOCK_1, &pm_rt_ape_base->read_permission_0);
  89         writel(UNLOCK_1, &pm_rt_ape_base->wirte_permission_0);
  90         writel(UNLOCK_2, &pm_rt_ape_base->addr_match_1);
  91
  92         writel(UNLOCK_3, &pm_gpmc_base->req_info_permission_0);
  93         writel(UNLOCK_3, &pm_gpmc_base->read_permission_0);
  94         writel(UNLOCK_3, &pm_gpmc_base->wirte_permission_0);
  95
  96         writel(UNLOCK_3, &pm_ocm_ram_base->req_info_permission_0);
  97         writel(UNLOCK_3, &pm_ocm_ram_base->read_permission_0);
  98         writel(UNLOCK_3, &pm_ocm_ram_base->wirte_permission_0);
  99         writel(UNLOCK_2, &pm_ocm_ram_base->addr_match_2);
 100
 101         /* IVA Changes */
 102         writel(UNLOCK_3, &pm_iva2_base->req_info_permission_0);
 103         writel(UNLOCK_3, &pm_iva2_base->read_permission_0);
 104         writel(UNLOCK_3, &pm_iva2_base->wirte_permission_0);
 105
 106         /* SDRC region 0 public */
 107         writel(UNLOCK_1, &sms_base->rg_att0);
 108 }
 109
 110 /******************************************************************************
 111  * Routine: secureworld_exit()
 112  * Description: If chip is EMU and boot type is external
 113  *              configure secure registers and exit secure world
 114  *              general use.
 115  *****************************************************************************/
 116 void secureworld_exit(void)
 117 {
 118         unsigned long i;
 119
 120         /* configure non-secure access control register */
 121         __asm__ __volatile__("mrc p15, 0, %0, c1, c1, 2":"=r"(i));
 122         /* enabling co-processor CP10 and CP11 accesses in NS world */
 123         __asm__ __volatile__("orr %0, %0, #0xC00":"=r"(i));
 124         /*
 125          * allow allocation of locked TLBs and L2 lines in NS world
 126          * allow use of PLE registers in NS world also
 127          */
 128         __asm__ __volatile__("orr %0, %0, #0x70000":"=r"(i));
 129         __asm__ __volatile__("mcr p15, 0, %0, c1, c1, 2":"=r"(i));
 130
 131         /* Enable ASA in ACR register */
 132         __asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
 133         __asm__ __volatile__("orr %0, %0, #0x10":"=r"(i));
 134         __asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));
 135
 136         /* Exiting secure world */
 137         __asm__ __volatile__("mrc p15, 0, %0, c1, c1, 0":"=r"(i));
 138         __asm__ __volatile__("orr %0, %0, #0x31":"=r"(i));
 139         __asm__ __volatile__("mcr p15, 0, %0, c1, c1, 0":"=r"(i));
 140 }
 141
 142 /******************************************************************************
 143  * Routine: try_unlock_sram()
 144  * Description: If chip is GP/EMU(special) type, unlock the SRAM for
 145  *              general use.
 146  *****************************************************************************/
 147 void try_unlock_memory(void)
 148 {
 149         int mode;
 150         int in_sdram = is_running_in_sdram();
 151
 152         /*
 153          * if GP device unlock device SRAM for general use
 154          * secure code breaks for Secure/Emulation device - HS/E/T
 155          */
 156         mode = get_device_type();
 157         if (mode == GP_DEVICE)
 158                 secure_unlock_mem();
 159
 160         /*
 161          * If device is EMU and boot is XIP external booting
 162          * Unlock firewalls and disable L2 and put chip
 163          * out of secure world
 164          *
 165          * Assuming memories are unlocked by the demon who put us in SDRAM
 166          */
 167         if ((mode <= EMU_DEVICE) && (get_boot_type() == 0x1F)
 168             && (!in_sdram)) {
 169                 secure_unlock_mem();
 170                 secureworld_exit();
 171         }
 172
 173         return;
 174 }
 175
 176 /******************************************************************************
 177  * Routine: s_init
 178  * Description: Does early system init of muxing and clocks.
 179  *              - Called path is with SRAM stack.
 180  *****************************************************************************/
 181 void s_init(void)
 182 {
 183         watchdog_init();
 184
 185         try_unlock_memory();
 186
 187 #ifndef CONFIG_SYS_L2CACHE_OFF
 188         /* Invalidate L2-cache from secure mode */
 189         omap3_invalidate_l2_cache_secure();
 190 #endif
 191
 192         set_muxconf_regs();
 193         sdelay(100);
 194
 195         prcm_init();
 196
 197         per_clocks_enable();
 198
 199 #ifdef CONFIG_USB_EHCI_OMAP
 200         ehci_clocks_enable();
 201 #endif
 202 }
 203
 204 #ifdef CONFIG_SPL_BUILD
 205 void board_init_f(ulong dummy)
 206 {
 207         mem_init();
 208 }
 209 #endif
 210
 211 /*
 212  * Routine: misc_init_r
 213  * Description: A basic misc_init_r that just displays the die ID
 214  */
 215 int __weak misc_init_r(void)
 216 {
 217         omap_die_id_display();
 218
 219         return 0;
 220 }
 221
 222 /******************************************************************************
 223  * Routine: wait_for_command_complete
 224  * Description: Wait for posting to finish on watchdog
 225  *****************************************************************************/
 226 static void wait_for_command_complete(struct watchdog *wd_base)
 227 {
 228         int pending = 1;
 229         do {
 230                 pending = readl(&wd_base->wwps);
 231         } while (pending);
 232 }
 233
 234 /******************************************************************************
 235  * Routine: watchdog_init
 236  * Description: Shut down watch dogs
 237  *****************************************************************************/
 238 void watchdog_init(void)
 239 {
 240         struct watchdog *wd2_base = (struct watchdog *)WD2_BASE;
 241         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 242
 243         /*
 244          * There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is
 245          * either taken care of by ROM (HS/EMU) or not accessible (GP).
 246          * We need to take care of WD2-MPU or take a PRCM reset. WD3
 247          * should not be running and does not generate a PRCM reset.
 248          */
 249
 250         setbits_le32(&prcm_base->fclken_wkup, 0x20);
 251         setbits_le32(&prcm_base->iclken_wkup, 0x20);
 252         wait_on_value(ST_WDT2, 0x20, &prcm_base->idlest_wkup, 5);
 253
 254         writel(WD_UNLOCK1, &wd2_base->wspr);
 255         wait_for_command_complete(wd2_base);
 256         writel(WD_UNLOCK2, &wd2_base->wspr);
 257 }
 258
 259 /******************************************************************************
 260  * Dummy function to handle errors for EABI incompatibility
 261  *****************************************************************************/
 262 void abort(void)
 263 {
 264 }
 265
 266 #if defined(CONFIG_NAND_OMAP_GPMC) & !defined(CONFIG_SPL_BUILD)
 267 /******************************************************************************
 268  * OMAP3 specific command to switch between NAND HW and SW ecc
 269  *****************************************************************************/
 270 static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 271 {
 272         if (argc < 2 || argc > 3)
 273                 goto usage;
 274
 275         if (strncmp(argv[1], "hw", 2) == 0) {
 276                 if (argc == 2) {
 277                         omap_nand_switch_ecc(1, 1);
 278                 } else {
 279                         if (strncmp(argv[2], "hamming", 7) == 0)
 280                                 omap_nand_switch_ecc(1, 1);
 281                         else if (strncmp(argv[2], "bch8", 4) == 0)
 282                                 omap_nand_switch_ecc(1, 8);
 283                         else if (strncmp(argv[2], "bch16", 5) == 0)
 284                                 omap_nand_switch_ecc(1, 16);
 285                         else
 286                                 goto usage;
 287                 }
 288         } else if (strncmp(argv[1], "sw", 2) == 0) {
 289                 if (argc == 2) {
 290                         omap_nand_switch_ecc(0, 1);
 291                 } else {
 292                         if (strncmp(argv[2], "hamming", 7) == 0)
 293                                 omap_nand_switch_ecc(0, 1);
 294                         else if (strncmp(argv[2], "bch8", 4) == 0)
 295                                 omap_nand_switch_ecc(0, 8);
 296                         else
 297                                 goto usage;
 298                 }
 299         } else {
 300                 goto usage;
 301         }
 302
 303         return 0;
 304
 305 usage:
 306         printf ("Usage: nandecc %s\n", cmdtp->usage);
 307         return 1;
 308 }
 309
 310 U_BOOT_CMD(
 311         nandecc, 3, 1,  do_switch_ecc,
 312         "switch OMAP3 NAND ECC calculation algorithm",
 313         "hw [hamming|bch8|bch16] - Switch between NAND hardware 1-bit hamming"
 314         " and 8-bit/16-bit BCH\n"
 315         "                           ecc calculation (second parameter may"
 316         " be omitted).\n"
 317         "nandecc sw               - Switch to NAND software ecc algorithm."
 318 );
 319
 320 #endif /* CONFIG_NAND_OMAP_GPMC & !CONFIG_SPL_BUILD */
 321
 322 #ifdef CONFIG_DISPLAY_BOARDINFO
 323 /**
 324  * Print board information
 325  */
 326 int checkboard (void)
 327 {
 328         char *mem_s ;
 329
 330         if (is_mem_sdr())
 331                 mem_s = "mSDR";
 332         else
 333                 mem_s = "LPDDR";
 334
 335         printf("%s + %s/%s\n", sysinfo.board_string, mem_s,
 336                         sysinfo.nand_string);
 337
 338         return 0;
 339 }
 340 #endif  /* CONFIG_DISPLAY_BOARDINFO */
 341
 342 static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
 343 {
 344         u32 i, num_params = *parameters;
 345         u32 *sram_scratch_space = (u32 *)OMAP3_PUBLIC_SRAM_SCRATCH_AREA;
 346
 347         /*
 348          * copy the parameters to an un-cached area to avoid coherency
 349          * issues
 350          */
 351         for (i = 0; i < num_params; i++) {
 352                 __raw_writel(*parameters, sram_scratch_space);
 353                 parameters++;
 354                 sram_scratch_space++;
 355         }
 356
 357         /* Now make the PPA call */
 358         do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
 359 }
 360
 361 void __weak omap3_set_aux_cr_secure(u32 acr)
 362 {
 363         struct emu_hal_params emu_romcode_params;
 364
 365         emu_romcode_params.num_params = 1;
 366         emu_romcode_params.param1 = acr;
 367         omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
 368                                (u32 *)&emu_romcode_params);
 369 }
 370
 371 void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
 372                           u32 cpu_variant, u32 cpu_rev)
 373 {
 374         /* Write ACR - affects secure banked bits */
 375         if (get_device_type() == GP_DEVICE)
 376                 omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr);
 377         else
 378                 omap3_set_aux_cr_secure(acr);
 379
 380         /* Write ACR - affects non-secure banked bits - some erratas need it */
 381         asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
 382 }
 383
 384
 385 #ifndef CONFIG_SYS_L2CACHE_OFF
 386 static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
 387 {
 388         u32 acr;
 389
 390         /* Read ACR */
 391         asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
 392         acr &= ~clear_bits;
 393         acr |= set_bits;
 394         v7_arch_cp15_set_acr(acr, 0, 0, 0, 0);
 395
 396 }
 397
 398 /* Invalidate the entire L2 cache from secure mode */
 399 static void omap3_invalidate_l2_cache_secure(void)
 400 {
 401         if (get_device_type() == GP_DEVICE) {
 402                 omap_smc1(OMAP3_GP_ROMCODE_API_L2_INVAL, 0);
 403         } else {
 404                 struct emu_hal_params emu_romcode_params;
 405                 emu_romcode_params.num_params = 1;
 406                 emu_romcode_params.param1 = 0;
 407                 omap3_emu_romcode_call(OMAP3_EMU_HAL_API_L2_INVAL,
 408                                        (u32 *)&emu_romcode_params);
 409         }
 410 }
 411
 412 void v7_outer_cache_enable(void)
 413 {
 414
 415         /*
 416          * Set L2EN
 417          * On some revisions L2EN bit is banked on some revisions it's not
 418          * No harm in setting both banked bits(in fact this is required
 419          * by an erratum)
 420          */
 421         omap3_update_aux_cr(0x2, 0);
 422 }
 423
 424 void omap3_outer_cache_disable(void)
 425 {
 426         /*
 427          * Clear L2EN
 428          * On some revisions L2EN bit is banked on some revisions it's not
 429          * No harm in clearing both banked bits(in fact this is required
 430          * by an erratum)
 431          */
 432         omap3_update_aux_cr(0, 0x2);
 433 }
 434 #endif /* !CONFIG_SYS_L2CACHE_OFF */