u-boot/arch/arm/cpu/arm926ejs/spear/spear600.c
Stefan Roese 2fbdbda1c7 arm: spear: Move to common SPL infrastructure
The SPL implementation for SPEAr600 is older than the common SPL
infrastructure. This patch now moves the SPEAr600 SPL over to the
common SPL code.

Tested on the only SPEAr board that currently uses SPL in mainline
U-Boot, the x600.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vipin Kumar <vk.vipin@gmail.com>
2015-08-28 12:33:16 -04:00

224 lines
4.8 KiB
C

/*
* (C) Copyright 2000-2009
* Viresh Kumar, ST Microelectronics, viresh.kumar@st.com
* Vipin Kumar, ST Microelectronics, vipin.kumar@st.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/arch/spr_misc.h>
#include <asm/arch/spr_defs.h>
void spear_late_init(void)
{
struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
writel(0x80000007, &misc_p->arb_icm_ml1);
writel(0x80000007, &misc_p->arb_icm_ml2);
writel(0x80000007, &misc_p->arb_icm_ml3);
writel(0x80000007, &misc_p->arb_icm_ml4);
writel(0x80000007, &misc_p->arb_icm_ml5);
writel(0x80000007, &misc_p->arb_icm_ml6);
writel(0x80000007, &misc_p->arb_icm_ml7);
writel(0x80000007, &misc_p->arb_icm_ml8);
writel(0x80000007, &misc_p->arb_icm_ml9);
}
static void sel_1v8(void)
{
struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
u32 ddr1v8, ddr2v5;
ddr2v5 = readl(&misc_p->ddr_2v5_compensation);
ddr2v5 &= 0x8080ffc0;
ddr2v5 |= 0x78000003;
writel(ddr2v5, &misc_p->ddr_2v5_compensation);
ddr1v8 = readl(&misc_p->ddr_1v8_compensation);
ddr1v8 &= 0x8080ffc0;
ddr1v8 |= 0x78000010;
writel(ddr1v8, &misc_p->ddr_1v8_compensation);
while (!(readl(&misc_p->ddr_1v8_compensation) & DDR_COMP_ACCURATE))
;
}
static void sel_2v5(void)
{
struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
u32 ddr1v8, ddr2v5;
ddr1v8 = readl(&misc_p->ddr_1v8_compensation);
ddr1v8 &= 0x8080ffc0;
ddr1v8 |= 0x78000003;
writel(ddr1v8, &misc_p->ddr_1v8_compensation);
ddr2v5 = readl(&misc_p->ddr_2v5_compensation);
ddr2v5 &= 0x8080ffc0;
ddr2v5 |= 0x78000010;
writel(ddr2v5, &misc_p->ddr_2v5_compensation);
while (!(readl(&misc_p->ddr_2v5_compensation) & DDR_COMP_ACCURATE))
;
}
/*
* plat_ddr_init:
*/
void plat_ddr_init(void)
{
struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
u32 ddrpad;
u32 core3v3, ddr1v8, ddr2v5;
/* DDR pad register configurations */
ddrpad = readl(&misc_p->ddr_pad);
ddrpad &= ~DDR_PAD_CNF_MSK;
#if (CONFIG_DDR_HCLK)
ddrpad |= 0xEAAB;
#elif (CONFIG_DDR_2HCLK)
ddrpad |= 0xEAAD;
#elif (CONFIG_DDR_PLL2)
ddrpad |= 0xEAAD;
#endif
writel(ddrpad, &misc_p->ddr_pad);
/* Compensation register configurations */
core3v3 = readl(&misc_p->core_3v3_compensation);
core3v3 &= 0x8080ffe0;
core3v3 |= 0x78000002;
writel(core3v3, &misc_p->core_3v3_compensation);
ddr1v8 = readl(&misc_p->ddr_1v8_compensation);
ddr1v8 &= 0x8080ffc0;
ddr1v8 |= 0x78000004;
writel(ddr1v8, &misc_p->ddr_1v8_compensation);
ddr2v5 = readl(&misc_p->ddr_2v5_compensation);
ddr2v5 &= 0x8080ffc0;
ddr2v5 |= 0x78000004;
writel(ddr2v5, &misc_p->ddr_2v5_compensation);
if ((readl(&misc_p->ddr_pad) & DDR_PAD_SW_CONF) == DDR_PAD_SW_CONF) {
/* Software memory configuration */
if (readl(&misc_p->ddr_pad) & DDR_PAD_SSTL_SEL)
sel_1v8();
else
sel_2v5();
} else {
/* Hardware memory configuration */
if (readl(&misc_p->ddr_pad) & DDR_PAD_DRAM_TYPE)
sel_1v8();
else
sel_2v5();
}
}
/*
* xxx_boot_selected:
*
* return true if the particular booting option is selected
* return false otherwise
*/
static u32 read_bootstrap(void)
{
return (readl(CONFIG_SPEAR_BOOTSTRAPCFG) >> CONFIG_SPEAR_BOOTSTRAPSHFT)
& CONFIG_SPEAR_BOOTSTRAPMASK;
}
int snor_boot_selected(void)
{
u32 bootstrap = read_bootstrap();
if (SNOR_BOOT_SUPPORTED) {
/* Check whether SNOR boot is selected */
if ((bootstrap & CONFIG_SPEAR_ONLYSNORBOOT) ==
CONFIG_SPEAR_ONLYSNORBOOT)
return true;
if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
CONFIG_SPEAR_NORNAND8BOOT)
return true;
if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
CONFIG_SPEAR_NORNAND16BOOT)
return true;
}
return false;
}
int nand_boot_selected(void)
{
u32 bootstrap = read_bootstrap();
if (NAND_BOOT_SUPPORTED) {
/* Check whether NAND boot is selected */
if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
CONFIG_SPEAR_NORNAND8BOOT)
return true;
if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
CONFIG_SPEAR_NORNAND16BOOT)
return true;
}
return false;
}
int pnor_boot_selected(void)
{
/* Parallel NOR boot is not selected in any SPEAr600 revision */
return false;
}
int usb_boot_selected(void)
{
u32 bootstrap = read_bootstrap();
if (USB_BOOT_SUPPORTED) {
/* Check whether USB boot is selected */
if (!(bootstrap & CONFIG_SPEAR_USBBOOT))
return true;
}
return false;
}
int tftp_boot_selected(void)
{
/* TFTP boot is not selected in any SPEAr600 revision */
return false;
}
int uart_boot_selected(void)
{
/* UART boot is not selected in any SPEAr600 revision */
return false;
}
int spi_boot_selected(void)
{
/* SPI boot is not selected in any SPEAr600 revision */
return false;
}
int i2c_boot_selected(void)
{
/* I2C boot is not selected in any SPEAr600 revision */
return false;
}
int mmc_boot_selected(void)
{
return false;
}
void plat_late_init(void)
{
spear_late_init();
}