/* * * Common board functions for OMAP3 based boards. * * (C) Copyright 2004-2008 * Texas Instruments, * * Author : * Sunil Kumar * Shashi Ranjan * * Derived from Beagle Board and 3430 SDP code by * Richard Woodruff * Syed Mohammed Khasim * * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include #include #include #include #include #include /* Declarations */ extern omap3_sysinfo sysinfo; static void omap3_setup_aux_cr(void); static void omap3_invalidate_l2_cache_secure(void); static const struct gpio_bank gpio_bank_34xx[6] = { { (void *)OMAP34XX_GPIO1_BASE, METHOD_GPIO_24XX }, { (void *)OMAP34XX_GPIO2_BASE, METHOD_GPIO_24XX }, { (void *)OMAP34XX_GPIO3_BASE, METHOD_GPIO_24XX }, { (void *)OMAP34XX_GPIO4_BASE, METHOD_GPIO_24XX }, { (void *)OMAP34XX_GPIO5_BASE, METHOD_GPIO_24XX }, { (void *)OMAP34XX_GPIO6_BASE, METHOD_GPIO_24XX }, }; const struct gpio_bank *const omap_gpio_bank = gpio_bank_34xx; #ifdef CONFIG_SPL_BUILD /* * We use static variables because global data is not ready yet. * Initialized data is available in SPL right from the beginning. * We would not typically need to save these parameters in regular * U-Boot. This is needed only in SPL at the moment. */ u32 omap3_boot_device = BOOT_DEVICE_NAND; /* auto boot mode detection is not possible for OMAP3 - hard code */ u32 omap_boot_mode(void) { switch (omap_boot_device()) { case BOOT_DEVICE_MMC2: return MMCSD_MODE_RAW; case BOOT_DEVICE_MMC1: return MMCSD_MODE_FAT; break; case BOOT_DEVICE_NAND: return NAND_MODE_HW_ECC; break; default: puts("spl: ERROR: unknown device - can't select boot mode\n"); hang(); } } u32 omap_boot_device(void) { return omap3_boot_device; } #endif /* CONFIG_SPL_BUILD */ /****************************************************************************** * Routine: delay * Description: spinning delay to use before udelay works *****************************************************************************/ static inline void delay(unsigned long loops) { __asm__ volatile ("1:\n" "subs %0, %1, #1\n" "bne 1b":"=r" (loops):"0"(loops)); } /****************************************************************************** * Routine: secure_unlock * Description: Setup security registers for access * (GP Device only) *****************************************************************************/ void secure_unlock_mem(void) { struct pm *pm_rt_ape_base = (struct pm *)PM_RT_APE_BASE_ADDR_ARM; struct pm *pm_gpmc_base = (struct pm *)PM_GPMC_BASE_ADDR_ARM; struct pm *pm_ocm_ram_base = (struct pm *)PM_OCM_RAM_BASE_ADDR_ARM; struct pm *pm_iva2_base = (struct pm *)PM_IVA2_BASE_ADDR_ARM; struct sms *sms_base = (struct sms *)OMAP34XX_SMS_BASE; /* Protection Module Register Target APE (PM_RT) */ writel(UNLOCK_1, &pm_rt_ape_base->req_info_permission_1); writel(UNLOCK_1, &pm_rt_ape_base->read_permission_0); writel(UNLOCK_1, &pm_rt_ape_base->wirte_permission_0); writel(UNLOCK_2, &pm_rt_ape_base->addr_match_1); writel(UNLOCK_3, &pm_gpmc_base->req_info_permission_0); writel(UNLOCK_3, &pm_gpmc_base->read_permission_0); writel(UNLOCK_3, &pm_gpmc_base->wirte_permission_0); writel(UNLOCK_3, &pm_ocm_ram_base->req_info_permission_0); writel(UNLOCK_3, &pm_ocm_ram_base->read_permission_0); writel(UNLOCK_3, &pm_ocm_ram_base->wirte_permission_0); writel(UNLOCK_2, &pm_ocm_ram_base->addr_match_2); /* IVA Changes */ writel(UNLOCK_3, &pm_iva2_base->req_info_permission_0); writel(UNLOCK_3, &pm_iva2_base->read_permission_0); writel(UNLOCK_3, &pm_iva2_base->wirte_permission_0); /* SDRC region 0 public */ writel(UNLOCK_1, &sms_base->rg_att0); } /****************************************************************************** * Routine: secureworld_exit() * Description: If chip is EMU and boot type is external * configure secure registers and exit secure world * general use. *****************************************************************************/ void secureworld_exit() { unsigned long i; /* configrue non-secure access control register */ __asm__ __volatile__("mrc p15, 0, %0, c1, c1, 2":"=r"(i)); /* enabling co-processor CP10 and CP11 accesses in NS world */ __asm__ __volatile__("orr %0, %0, #0xC00":"=r"(i)); /* * allow allocation of locked TLBs and L2 lines in NS world * allow use of PLE registers in NS world also */ __asm__ __volatile__("orr %0, %0, #0x70000":"=r"(i)); __asm__ __volatile__("mcr p15, 0, %0, c1, c1, 2":"=r"(i)); /* Enable ASA in ACR register */ __asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i)); __asm__ __volatile__("orr %0, %0, #0x10":"=r"(i)); __asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i)); /* Exiting secure world */ __asm__ __volatile__("mrc p15, 0, %0, c1, c1, 0":"=r"(i)); __asm__ __volatile__("orr %0, %0, #0x31":"=r"(i)); __asm__ __volatile__("mcr p15, 0, %0, c1, c1, 0":"=r"(i)); } /****************************************************************************** * Routine: try_unlock_sram() * Description: If chip is GP/EMU(special) type, unlock the SRAM for * general use. *****************************************************************************/ void try_unlock_memory() { int mode; int in_sdram = is_running_in_sdram(); /* * if GP device unlock device SRAM for general use * secure code breaks for Secure/Emulation device - HS/E/T */ mode = get_device_type(); if (mode == GP_DEVICE) secure_unlock_mem(); /* * If device is EMU and boot is XIP external booting * Unlock firewalls and disable L2 and put chip * out of secure world * * Assuming memories are unlocked by the demon who put us in SDRAM */ if ((mode <= EMU_DEVICE) && (get_boot_type() == 0x1F) && (!in_sdram)) { secure_unlock_mem(); secureworld_exit(); } return; } /****************************************************************************** * Routine: s_init * Description: Does early system init of muxing and clocks. * - Called path is with SRAM stack. *****************************************************************************/ void s_init(void) { int in_sdram = is_running_in_sdram(); watchdog_init(); try_unlock_memory(); /* Errata workarounds */ omap3_setup_aux_cr(); #ifndef CONFIG_SYS_L2CACHE_OFF /* Invalidate L2-cache from secure mode */ omap3_invalidate_l2_cache_secure(); #endif set_muxconf_regs(); delay(100); prcm_init(); per_clocks_enable(); #ifdef CONFIG_SPL_BUILD preloader_console_init(); #endif if (!in_sdram) mem_init(); } /****************************************************************************** * Routine: wait_for_command_complete * Description: Wait for posting to finish on watchdog *****************************************************************************/ void wait_for_command_complete(struct watchdog *wd_base) { int pending = 1; do { pending = readl(&wd_base->wwps); } while (pending); } /****************************************************************************** * Routine: watchdog_init * Description: Shut down watch dogs *****************************************************************************/ void watchdog_init(void) { struct watchdog *wd2_base = (struct watchdog *)WD2_BASE; struct prcm *prcm_base = (struct prcm *)PRCM_BASE; /* * There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is * either taken care of by ROM (HS/EMU) or not accessible (GP). * We need to take care of WD2-MPU or take a PRCM reset. WD3 * should not be running and does not generate a PRCM reset. */ sr32(&prcm_base->fclken_wkup, 5, 1, 1); sr32(&prcm_base->iclken_wkup, 5, 1, 1); wait_on_value(ST_WDT2, 0x20, &prcm_base->idlest_wkup, 5); writel(WD_UNLOCK1, &wd2_base->wspr); wait_for_command_complete(wd2_base); writel(WD_UNLOCK2, &wd2_base->wspr); } /****************************************************************************** * Dummy function to handle errors for EABI incompatibility *****************************************************************************/ void abort(void) { } #if defined(CONFIG_NAND_OMAP_GPMC) & !defined(CONFIG_SPL_BUILD) /****************************************************************************** * OMAP3 specific command to switch between NAND HW and SW ecc *****************************************************************************/ static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { if (argc != 2) goto usage; if (strncmp(argv[1], "hw", 2) == 0) omap_nand_switch_ecc(1); else if (strncmp(argv[1], "sw", 2) == 0) omap_nand_switch_ecc(0); else goto usage; return 0; usage: printf ("Usage: nandecc %s\n", cmdtp->usage); return 1; } U_BOOT_CMD( nandecc, 2, 1, do_switch_ecc, "switch OMAP3 NAND ECC calculation algorithm", "[hw/sw] - Switch between NAND hardware (hw) or software (sw) ecc algorithm" ); #endif /* CONFIG_NAND_OMAP_GPMC & !CONFIG_SPL_BUILD */ #ifdef CONFIG_DISPLAY_BOARDINFO /** * Print board information */ int checkboard (void) { char *mem_s ; if (is_mem_sdr()) mem_s = "mSDR"; else mem_s = "LPDDR"; printf("%s + %s/%s\n", sysinfo.board_string, mem_s, sysinfo.nand_string); return 0; } #endif /* CONFIG_DISPLAY_BOARDINFO */ static void omap3_emu_romcode_call(u32 service_id, u32 *parameters) { u32 i, num_params = *parameters; u32 *sram_scratch_space = (u32 *)OMAP3_PUBLIC_SRAM_SCRATCH_AREA; /* * copy the parameters to an un-cached area to avoid coherency * issues */ for (i = 0; i < num_params; i++) { __raw_writel(*parameters, sram_scratch_space); parameters++; sram_scratch_space++; } /* Now make the PPA call */ do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA); } static void omap3_update_aux_cr_secure(u32 set_bits, u32 clear_bits) { u32 acr; /* Read ACR */ asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr)); acr &= ~clear_bits; acr |= set_bits; if (get_device_type() == GP_DEVICE) { omap3_gp_romcode_call(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr); } else { struct emu_hal_params emu_romcode_params; emu_romcode_params.num_params = 1; emu_romcode_params.param1 = acr; omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR, (u32 *)&emu_romcode_params); } } static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits) { u32 acr; /* Read ACR */ asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr)); acr &= ~clear_bits; acr |= set_bits; /* Write ACR - affects non-secure banked bits */ asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr)); } static void omap3_setup_aux_cr(void) { /* Workaround for Cortex-A8 errata: #454179 #430973 * Set "IBE" bit * Set "Disable Brach Size Mispredicts" bit * Workaround for erratum #621766 * Enable L1NEON bit * ACR |= (IBE | DBSM | L1NEON) => ACR |= 0xE0 */ omap3_update_aux_cr_secure(0xE0, 0); } #ifndef CONFIG_SYS_L2CACHE_OFF /* Invalidate the entire L2 cache from secure mode */ static void omap3_invalidate_l2_cache_secure(void) { if (get_device_type() == GP_DEVICE) { omap3_gp_romcode_call(OMAP3_GP_ROMCODE_API_L2_INVAL, 0); } else { struct emu_hal_params emu_romcode_params; emu_romcode_params.num_params = 1; emu_romcode_params.param1 = 0; omap3_emu_romcode_call(OMAP3_EMU_HAL_API_L2_INVAL, (u32 *)&emu_romcode_params); } } void v7_outer_cache_enable(void) { /* Set L2EN */ omap3_update_aux_cr_secure(0x2, 0); /* * On some revisions L2EN bit is banked on some revisions it's not * No harm in setting both banked bits(in fact this is required * by an erratum) */ omap3_update_aux_cr(0x2, 0); } void v7_outer_cache_disable(void) { /* Clear L2EN */ omap3_update_aux_cr_secure(0, 0x2); /* * On some revisions L2EN bit is banked on some revisions it's not * No harm in clearing both banked bits(in fact this is required * by an erratum) */ omap3_update_aux_cr(0, 0x2); } #endif #ifndef CONFIG_SYS_DCACHE_OFF void enable_caches(void) { /* Enable D-cache. I-cache is already enabled in start.S */ dcache_enable(); } #endif void omap_rev_string(char *omap_rev_string) { sprintf(omap_rev_string, "OMAP3, sorry revision detection" \ " unimplemented"); }