u-boot/arch/arm/cpu/arm926ejs/spear/spear600.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

223 lines
4.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2009
* Viresh Kumar, ST Microelectronics, viresh.kumar@st.com
* Vipin Kumar, ST Microelectronics, vipin.kumar@st.com
*/
#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();
}