1 /* 2 * (C) Copyright 2010 3 * Texas Instruments, <www.ti.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef _SYS_PROTO_H_ 9 #define _SYS_PROTO_H_ 10 11 #include <asm/arch/omap.h> 12 #include <asm/arch/clock.h> 13 #include <asm/io.h> 14 #include <asm/omap_common.h> 15 #include <linux/mtd/omap_gpmc.h> 16 #include <asm/arch/mux_omap4.h> 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 extern const struct emif_regs emif_regs_elpida_200_mhz_2cs; 21 extern const struct emif_regs emif_regs_elpida_380_mhz_1cs; 22 extern const struct emif_regs emif_regs_elpida_400_mhz_1cs; 23 extern const struct emif_regs emif_regs_elpida_400_mhz_2cs; 24 struct omap_sysinfo { 25 char *board_string; 26 }; 27 extern const struct omap_sysinfo sysinfo; 28 29 void gpmc_init(void); 30 void watchdog_init(void); 31 u32 get_device_type(void); 32 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 33 void set_muxconf_regs_essential(void); 34 u32 wait_on_value(u32, u32, void *, u32); 35 void sdelay(unsigned long); 36 void set_pl310_ctrl_reg(u32 val); 37 void setup_clocks_for_console(void); 38 void prcm_init(void); 39 void bypass_dpll(u32 const base); 40 void freq_update_core(void); 41 u32 get_sys_clk_freq(void); 42 u32 omap4_ddr_clk(void); 43 void cancel_out(u32 *num, u32 *den, u32 den_limit); 44 void sdram_init(void); 45 u32 omap_sdram_size(void); 46 u32 cortex_rev(void); 47 void save_omap_boot_params(void); 48 void init_omap_revision(void); 49 void do_io_settings(void); 50 void sri2c_init(void); 51 void gpi2c_init(void); 52 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data); 53 u32 warm_reset(void); 54 void force_emif_self_refresh(void); 55 void setup_warmreset_time(void); 56 57 static inline u32 running_from_sdram(void) 58 { 59 u32 pc; 60 asm volatile ("mov %0, pc" : "=r" (pc)); 61 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) && 62 (pc < OMAP44XX_DRAM_ADDR_SPACE_END)); 63 } 64 65 static inline u8 uboot_loaded_by_spl(void) 66 { 67 /* 68 * u-boot can be running from sdram either because of configuration 69 * Header or by SPL. If because of CH, then the romcode sets the 70 * CHSETTINGS executed bit to true in the boot parameter structure that 71 * it passes to the bootloader.This parameter is stored in the ch_flags 72 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a 73 * mandatory section if CH is present. 74 */ 75 if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) 76 return 0; 77 else 78 return running_from_sdram(); 79 } 80 /* 81 * The basic hardware init of OMAP(s_init()) can happen in 4 82 * different contexts: 83 * 1. SPL running from SRAM 84 * 2. U-Boot running from FLASH 85 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 86 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 87 * Configuration Header feature 88 * 89 * This function finds this context. 90 * Defining as inline may help in compiling out unused functions in SPL 91 */ 92 static inline u32 omap_hw_init_context(void) 93 { 94 #ifdef CONFIG_SPL_BUILD 95 return OMAP_INIT_CONTEXT_SPL; 96 #else 97 if (uboot_loaded_by_spl()) 98 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 99 else if (running_from_sdram()) 100 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 101 else 102 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 103 #endif 104 } 105 106 #endif 107