1 /* 2 * (C) Copyright 2010 3 * Texas Instruments, <www.ti.com> 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation; either version 2 of 8 * the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 18 * MA 02111-1307 USA 19 */ 20 21 #ifndef _SYS_PROTO_H_ 22 #define _SYS_PROTO_H_ 23 24 #include <asm/arch/omap.h> 25 #include <asm/io.h> 26 #include <asm/arch/clocks.h> 27 #include <asm/omap_common.h> 28 #include <asm/arch/clocks.h> 29 30 DECLARE_GLOBAL_DATA_PTR; 31 32 struct pad_conf_entry { 33 u32 offset; 34 u32 val; 35 }; 36 37 struct omap_sysinfo { 38 char *board_string; 39 }; 40 extern const struct omap_sysinfo sysinfo; 41 42 void gpmc_init(void); 43 void watchdog_init(void); 44 u32 get_device_type(void); 45 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 46 void set_muxconf_regs_essential(void); 47 void set_muxconf_regs_non_essential(void); 48 void sr32(void *, u32, u32, u32); 49 u32 wait_on_value(u32, u32, void *, u32); 50 void sdelay(unsigned long); 51 void setup_clocks_for_console(void); 52 void prcm_init(void); 53 void bypass_dpll(u32 const base); 54 void freq_update_core(void); 55 u32 get_sys_clk_freq(void); 56 u32 omap5_ddr_clk(void); 57 void cancel_out(u32 *num, u32 *den, u32 den_limit); 58 void sdram_init(void); 59 u32 omap_sdram_size(void); 60 u32 cortex_rev(void); 61 void save_omap_boot_params(void); 62 void init_omap_revision(void); 63 void do_io_settings(void); 64 void omap_vc_init(u16 speed_khz); 65 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data); 66 u32 warm_reset(void); 67 void force_emif_self_refresh(void); 68 void get_ioregs(const struct ctrl_ioregs **regs); 69 void srcomp_enable(void); 70 void setup_warmreset_time(void); 71 72 static inline u32 running_from_sdram(void) 73 { 74 u32 pc; 75 asm volatile ("mov %0, pc" : "=r" (pc)); 76 return ((pc >= OMAP54XX_DRAM_ADDR_SPACE_START) && 77 (pc < OMAP54XX_DRAM_ADDR_SPACE_END)); 78 } 79 80 static inline u8 uboot_loaded_by_spl(void) 81 { 82 /* 83 * u-boot can be running from sdram either because of configuration 84 * Header or by SPL. If because of CH, then the romcode sets the 85 * CHSETTINGS executed bit to true in the boot parameter structure that 86 * it passes to the bootloader.This parameter is stored in the ch_flags 87 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a 88 * mandatory section if CH is present. 89 */ 90 if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) 91 return 0; 92 else 93 return running_from_sdram(); 94 } 95 /* 96 * The basic hardware init of OMAP(s_init()) can happen in 4 97 * different contexts: 98 * 1. SPL running from SRAM 99 * 2. U-Boot running from FLASH 100 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 101 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 102 * Configuration Header feature 103 * 104 * This function finds this context. 105 * Defining as inline may help in compiling out unused functions in SPL 106 */ 107 static inline u32 omap_hw_init_context(void) 108 { 109 #ifdef CONFIG_SPL_BUILD 110 return OMAP_INIT_CONTEXT_SPL; 111 #else 112 if (uboot_loaded_by_spl()) 113 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 114 else if (running_from_sdram()) 115 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 116 else 117 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 118 #endif 119 } 120 121 static inline u32 div_round_up(u32 num, u32 den) 122 { 123 return (num + den - 1)/den; 124 } 125 126 static inline u32 usec_to_32k(u32 usec) 127 { 128 return div_round_up(32768 * usec, 1000000); 129 } 130 #endif 131