/* * * 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 extern omap3_sysinfo sysinfo; /****************************************************************************** * 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) { pm_t *pm_rt_ape_base = (pm_t *)PM_RT_APE_BASE_ADDR_ARM; pm_t *pm_gpmc_base = (pm_t *)PM_GPMC_BASE_ADDR_ARM; pm_t *pm_ocm_ram_base = (pm_t *)PM_OCM_RAM_BASE_ADDR_ARM; pm_t *pm_iva2_base = (pm_t *)PM_IVA2_BASE_ADDR_ARM; sms_t *sms_base = (sms_t *)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: setup_auxcr() * Description: Write to AuxCR desired value using SMI. * general use. *****************************************************************************/ void setup_auxcr() { unsigned long i; volatile unsigned int j; /* Save r0, r12 and restore them after usage */ __asm__ __volatile__("mov %0, r12":"=r"(j)); __asm__ __volatile__("mov %0, r0":"=r"(i)); /* * GP Device ROM code API usage here * r12 = AUXCR Write function and r0 value */ __asm__ __volatile__("mov r12, #0x3"); __asm__ __volatile__("mrc p15, 0, r0, c1, c0, 1"); /* Enabling ASA */ __asm__ __volatile__("orr r0, r0, #0x10"); /* Enable L1NEON */ __asm__ __volatile__("orr r0, r0, #1 << 5"); /* SMI instruction to call ROM Code API */ __asm__ __volatile__(".word 0xE1600070"); __asm__ __volatile__("mov r0, %0":"=r"(i)); __asm__ __volatile__("mov r12, %0":"=r"(j)); } /****************************************************************************** * 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(); /* * Right now flushing at low MPU speed. * Need to move after clock init */ v7_flush_dcache_all(get_device_type()); #ifndef CONFIG_ICACHE_OFF icache_enable(); #endif #ifdef CONFIG_L2_OFF l2cache_disable(); #else l2cache_enable(); #endif /* * Writing to AuxCR in U-boot using SMI for GP DEV * Currently SMI in Kernel on ES2 devices seems to have an issue * Once that is resolved, we can postpone this config to kernel */ if (get_device_type() == GP_DEVICE) setup_auxcr(); set_muxconf_regs(); delay(100); prcm_init(); per_clocks_enable(); if (!in_sdram) sdrc_init(); } /****************************************************************************** * Routine: wait_for_command_complete * Description: Wait for posting to finish on watchdog *****************************************************************************/ void wait_for_command_complete(watchdog_t *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) { watchdog_t *wd2_base = (watchdog_t *)WD2_BASE; prcm_t *prcm_base = (prcm_t *)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); } /****************************************************************************** * Routine: dram_init * Description: sets uboots idea of sdram size *****************************************************************************/ int dram_init(void) { DECLARE_GLOBAL_DATA_PTR; unsigned int size0 = 0, size1 = 0; u32 btype; btype = get_board_type(); display_board_info(btype); /* * If a second bank of DDR is attached to CS1 this is * where it can be started. Early init code will init * memory on CS0. */ if ((sysinfo.mtype == DDR_COMBO) || (sysinfo.mtype == DDR_STACKED)) { do_sdrc_init(CS1, NOT_EARLY); make_cs1_contiguous(); } size0 = get_sdr_cs_size(CS0); size1 = get_sdr_cs_size(CS1); gd->bd->bi_dram[0].start = PHYS_SDRAM_1; gd->bd->bi_dram[0].size = size0; gd->bd->bi_dram[1].start = PHYS_SDRAM_1 + get_sdr_cs_offset(CS1); gd->bd->bi_dram[1].size = size1; return 0; } /****************************************************************************** * Dummy function to handle errors for EABI incompatibility *****************************************************************************/ void raise(void) { } /****************************************************************************** * Dummy function to handle errors for EABI incompatibility *****************************************************************************/ void abort(void) { } #ifdef CONFIG_NAND_OMAP_GPMC /****************************************************************************** * 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 *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, "nandecc - switch OMAP3 NAND ECC calculation algorithm\n", "[hw/sw] - Switch between NAND hardware (hw) or software (sw) ecc algorithm\n" ); #endif /* CONFIG_NAND_OMAP_GPMC */