This file originates in Linux. Linux has it under include/linux/ directory since commit dccd2304cc90. Let's move it to the same place as well in barebox. This commit was generated by the following commands: find -name '*.[chS]' | xargs sed -i -e 's:<sizes.h>:<linux/sizes.h>:' git mv include/sizes.h include/linux/ Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
200 lines
4.3 KiB
C
200 lines
4.3 KiB
C
/*
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* Copyright (C) 2008 Ronetix Ilko Iliev (www.ronetix.at)
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* Copyright (C) 2009-2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* Under GPLv2
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*/
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#define __LOWLEVEL_INIT__
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#include <common.h>
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#include <asm/system.h>
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#include <asm/barebox-arm.h>
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#include <asm/barebox-arm-head.h>
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#include <mach/hardware.h>
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#include <mach/at91_pmc.h>
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#include <mach/at91_pio.h>
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#include <mach/at91_rstc.h>
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#include <mach/at91_wdt.h>
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#include <mach/at91sam9_matrix.h>
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#include <mach/at91sam9_sdramc.h>
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#include <mach/at91sam9_smc.h>
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#include <mach/at91_lowlevel_init.h>
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#include <mach/gpio.h>
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#include <mach/io.h>
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#include <init.h>
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#include <linux/sizes.h>
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#include "gpio.h"
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static void inline access_sdram(void)
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{
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writel(0x00000000, AT91_SDRAM_BASE);
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}
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static void inline pmc_check_mckrdy(void)
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{
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u32 r;
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do {
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r = at91_pmc_read(AT91_PMC_SR);
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} while (!(r & AT91_PMC_MCKRDY));
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}
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static int inline running_in_sram(void)
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{
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u32 addr = get_pc();
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addr >>= 28;
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return addr == 0;
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}
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#define at91_sdramc_read(field) \
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__raw_readl(cfg->sdramc + field)
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#define at91_sdramc_write(field, value) \
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__raw_writel(value, cfg->sdramc + field)
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void __bare_init at91sam926x_sdramc_init(struct at91sam926x_lowlevel_cfg *cfg)
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{
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u32 r;
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int i;
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int in_sram = running_in_sram();
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/*
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* SDRAMC Check if Refresh Timer Counter is already initialized
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*/
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r = at91_sdramc_read(AT91_SDRAMC_TR);
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if (r && !in_sram)
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return;
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/* SDRAMC_MR : Normal Mode */
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at91_sdramc_write(AT91_SDRAMC_MR, AT91_SDRAMC_MODE_NORMAL);
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/* SDRAMC_TR - Refresh Timer register */
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at91_sdramc_write(AT91_SDRAMC_TR, cfg->sdrc_tr1);
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/* SDRAMC_CR - Configuration register*/
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at91_sdramc_write(AT91_SDRAMC_CR, cfg->sdrc_cr);
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/* Memory Device Type */
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at91_sdramc_write(AT91_SDRAMC_MDR, cfg->sdrc_mdr);
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/* SDRAMC_MR : Precharge All */
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at91_sdramc_write(AT91_SDRAMC_MR, AT91_SDRAMC_MODE_PRECHARGE);
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/* access SDRAM */
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access_sdram();
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/* SDRAMC_MR : refresh */
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at91_sdramc_write(AT91_SDRAMC_MR, AT91_SDRAMC_MODE_REFRESH);
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/* access SDRAM 8 times */
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for (i = 0; i < 8; i++)
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access_sdram();
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/* SDRAMC_MR : Load Mode Register */
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at91_sdramc_write(AT91_SDRAMC_MR, AT91_SDRAMC_MODE_LMR);
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/* access SDRAM */
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access_sdram();
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/* SDRAMC_MR : Normal Mode */
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at91_sdramc_write(AT91_SDRAMC_MR, AT91_SDRAMC_MODE_NORMAL);
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/* access SDRAM */
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access_sdram();
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/* SDRAMC_TR : Refresh Timer Counter */
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at91_sdramc_write(AT91_SDRAMC_TR, cfg->sdrc_tr2);
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/* access SDRAM */
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access_sdram();
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}
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void __bare_init at91sam926x_lowlevel_init(struct at91sam926x_lowlevel_cfg *cfg)
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{
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u32 r;
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int in_sram = running_in_sram();
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at91sam926x_lowlevel_board_config(cfg);
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__raw_writel(cfg->wdt_mr, AT91_BASE_WDT + AT91_WDT_MR);
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/* configure PIOx as EBI0 D[16-31] */
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at91_mux_gpio_disable(cfg->pio, cfg->ebi_pio_pdr);
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at91_mux_set_pullup(cfg->pio, cfg->ebi_pio_ppudr, true);
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if (cfg->ebi_pio_is_peripha)
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at91_mux_set_A_periph(cfg->pio, cfg->ebi_pio_ppudr);
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at91_sys_write(cfg->matrix_csa, cfg->ebi_csa);
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/* flash */
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at91_smc_write(cfg->smc_cs, AT91_SAM9_SMC_MODE, cfg->smc_mode);
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at91_smc_write(cfg->smc_cs, AT91_SMC_CYCLE, cfg->smc_cycle);
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at91_smc_write(cfg->smc_cs, AT91_SMC_PULSE, cfg->smc_pulse);
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at91_smc_write(cfg->smc_cs, AT91_SMC_SETUP, cfg->smc_setup);
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/*
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* PMC Check if the PLL is already initialized
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*/
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r = at91_pmc_read(AT91_PMC_MCKR);
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if (r & AT91_PMC_CSS && !in_sram)
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return;
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/*
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* Enable the Main Oscillator
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*/
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at91_pmc_write(AT91_CKGR_MOR, cfg->pmc_mor);
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do {
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r = at91_pmc_read(AT91_PMC_SR);
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} while (!(r & AT91_PMC_MOSCS));
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/*
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* PLLAR: x MHz for PCK
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*/
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at91_pmc_write(AT91_CKGR_PLLAR, cfg->pmc_pllar);
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do {
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r = at91_pmc_read(AT91_PMC_SR);
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} while (!(r & AT91_PMC_LOCKA));
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/*
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* PCK/x = MCK Master Clock from SLOW
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*/
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at91_pmc_write(AT91_PMC_MCKR, cfg->pmc_mckr1);
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pmc_check_mckrdy();
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/*
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* PCK/x = MCK Master Clock from PLLA
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*/
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at91_pmc_write(AT91_PMC_MCKR, cfg->pmc_mckr2);
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pmc_check_mckrdy();
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/*
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* Init SDRAM
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*/
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at91sam926x_sdramc_init(cfg);
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/* User reset enable*/
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at91_sys_write(AT91_RSTC_MR, cfg->rstc_rmr);
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#ifdef CONFIG_SYS_MATRIX_MCFG_REMAP
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/* MATRIX_MCFG - REMAP all masters */
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at91_sys_write(AT91_MATRIX_MCFG0, 0x1FF);
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#endif
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/*
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* When boot from external boot
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* we need to enable mck and ohter clock
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* so enable all of them
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* We will shutdown what we don't need later
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*/
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at91_pmc_write(AT91_PMC_PCER, 0xffffffff);
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}
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