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/io.h> 13 #include <asm/arch/clock.h> 14 #include <asm/omap_common.h> 15 #include <linux/mtd/omap_gpmc.h> 16 #include <asm/arch/clock.h> 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 struct pad_conf_entry { 21 u32 offset; 22 u32 val; 23 }; 24 25 struct omap_sysinfo { 26 char *board_string; 27 }; 28 extern const struct omap_sysinfo sysinfo; 29 30 void gpmc_init(void); 31 void watchdog_init(void); 32 u32 get_device_type(void); 33 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 34 void set_muxconf_regs_essential(void); 35 void sr32(void *, u32, u32, u32); 36 u32 wait_on_value(u32, u32, void *, u32); 37 void sdelay(unsigned long); 38 void setup_clocks_for_console(void); 39 void prcm_init(void); 40 void bypass_dpll(u32 const base); 41 void freq_update_core(void); 42 u32 get_sys_clk_freq(void); 43 u32 omap5_ddr_clk(void); 44 void cancel_out(u32 *num, u32 *den, u32 den_limit); 45 void sdram_init(void); 46 u32 omap_sdram_size(void); 47 u32 cortex_rev(void); 48 void save_omap_boot_params(void); 49 void init_omap_revision(void); 50 void do_io_settings(void); 51 void sri2c_init(void); 52 void gpi2c_init(void); 53 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data); 54 u32 warm_reset(void); 55 void force_emif_self_refresh(void); 56 void get_ioregs(const struct ctrl_ioregs **regs); 57 void srcomp_enable(void); 58 void setup_warmreset_time(void); 59 60 static inline u32 running_from_sdram(void) 61 { 62 u32 pc; 63 asm volatile ("mov %0, pc" : "=r" (pc)); 64 return ((pc >= OMAP54XX_DRAM_ADDR_SPACE_START) && 65 (pc < OMAP54XX_DRAM_ADDR_SPACE_END)); 66 } 67 68 static inline u8 uboot_loaded_by_spl(void) 69 { 70 /* 71 * u-boot can be running from sdram either because of configuration 72 * Header or by SPL. If because of CH, then the romcode sets the 73 * CHSETTINGS executed bit to true in the boot parameter structure that 74 * it passes to the bootloader.This parameter is stored in the ch_flags 75 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a 76 * mandatory section if CH is present. 77 */ 78 if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) 79 return 0; 80 else 81 return running_from_sdram(); 82 } 83 /* 84 * The basic hardware init of OMAP(s_init()) can happen in 4 85 * different contexts: 86 * 1. SPL running from SRAM 87 * 2. U-Boot running from FLASH 88 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 89 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 90 * Configuration Header feature 91 * 92 * This function finds this context. 93 * Defining as inline may help in compiling out unused functions in SPL 94 */ 95 static inline u32 omap_hw_init_context(void) 96 { 97 #ifdef CONFIG_SPL_BUILD 98 return OMAP_INIT_CONTEXT_SPL; 99 #else 100 if (uboot_loaded_by_spl()) 101 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 102 else if (running_from_sdram()) 103 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 104 else 105 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 106 #endif 107 } 108 109 static inline u32 div_round_up(u32 num, u32 den) 110 { 111 return (num + den - 1)/den; 112 } 113 114 static inline u32 usec_to_32k(u32 usec) 115 { 116 return div_round_up(32768 * usec, 1000000); 117 } 118 #endif 119