arch/arm/include/asm/arch-omap5/sys_proto.h

   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/clock.h>
  27 #include <asm/omap_common.h>
  28 #include <asm/arch/clock.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 sri2c_init(void);
  65 void gpi2c_init(void);
  66 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data);
  67 u32 warm_reset(void);
  68 void force_emif_self_refresh(void);
  69 void get_ioregs(const struct ctrl_ioregs **regs);
  70 void srcomp_enable(void);
  71 void setup_warmreset_time(void);
  72
  73 static inline u32 running_from_sdram(void)
  74 {
  75         u32 pc;
  76         asm volatile ("mov %0, pc" : "=r" (pc));
  77         return ((pc >= OMAP54XX_DRAM_ADDR_SPACE_START) &&
  78             (pc < OMAP54XX_DRAM_ADDR_SPACE_END));
  79 }
  80
  81 static inline u8 uboot_loaded_by_spl(void)
  82 {
  83         /*
  84          * u-boot can be running from sdram either because of configuration
  85          * Header or by SPL. If because of CH, then the romcode sets the
  86          * CHSETTINGS executed bit to true in the boot parameter structure that
  87          * it passes to the bootloader.This parameter is stored in the ch_flags
  88          * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a
  89          * mandatory section if CH is present.
  90          */
  91         if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS))
  92                 return 0;
  93         else
  94                 return running_from_sdram();
  95 }
  96 /*
  97  * The basic hardware init of OMAP(s_init()) can happen in 4
  98  * different contexts:
  99  *  1. SPL running from SRAM
 100  *  2. U-Boot running from FLASH
 101  *  3. Non-XIP U-Boot loaded to SDRAM by SPL
 102  *  4. Non-XIP U-Boot loaded to SDRAM by ROM code using the
 103  *     Configuration Header feature
 104  *
 105  * This function finds this context.
 106  * Defining as inline may help in compiling out unused functions in SPL
 107  */
 108 static inline u32 omap_hw_init_context(void)
 109 {
 110 #ifdef CONFIG_SPL_BUILD
 111         return OMAP_INIT_CONTEXT_SPL;
 112 #else
 113         if (uboot_loaded_by_spl())
 114                 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL;
 115         else if (running_from_sdram())
 116                 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH;
 117         else
 118                 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;
 119 #endif
 120 }
 121
 122 static inline u32 div_round_up(u32 num, u32 den)
 123 {
 124         return (num + den - 1)/den;
 125 }
 126
 127 static inline u32 usec_to_32k(u32 usec)
 128 {
 129         return div_round_up(32768 * usec, 1000000);
 130 }
 131 #endif