u-boot/arch/arm/cpu/armv7/exynos/spl_boot.c

312 lines
7.6 KiB
C

/*
* Copyright (C) 2012 Samsung Electronics
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <config.h>
#include <asm/arch/clock.h>
#include <asm/arch/clk.h>
#include <asm/arch/dmc.h>
#include <asm/arch/periph.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/power.h>
#include <asm/arch/spl.h>
#include <asm/arch/spi.h>
#include "common_setup.h"
#include "clock_init.h"
DECLARE_GLOBAL_DATA_PTR;
/* Index into irom ptr table */
enum index {
MMC_INDEX,
EMMC44_INDEX,
EMMC44_END_INDEX,
SPI_INDEX,
USB_INDEX,
};
/* IROM Function Pointers Table */
u32 irom_ptr_table[] = {
[MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
[EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
[EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
-EMMC4.4 end boot operation */
[SPI_INDEX] = 0x02020058, /* iROM Function Pointer-SPI boot */
[USB_INDEX] = 0x02020070, /* iROM Function Pointer-USB boot*/
};
void *get_irom_func(int index)
{
return (void *)*(u32 *)irom_ptr_table[index];
}
#ifdef CONFIG_USB_BOOTING
/*
* Set/clear program flow prediction and return the previous state.
*/
static int config_branch_prediction(int set_cr_z)
{
unsigned int cr;
/* System Control Register: 11th bit Z Branch prediction enable */
cr = get_cr();
set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
return cr & CR_Z;
}
#endif
#ifdef CONFIG_SPI_BOOTING
static void spi_rx_tx(struct exynos_spi *regs, int todo,
void *dinp, void const *doutp, int i)
{
uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
int rx_lvl, tx_lvl;
uint out_bytes, in_bytes;
out_bytes = todo;
in_bytes = todo;
setbits_le32(&regs->ch_cfg, SPI_CH_RST);
clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
while (in_bytes) {
uint32_t spi_sts;
int temp;
spi_sts = readl(&regs->spi_sts);
rx_lvl = ((spi_sts >> 15) & 0x7f);
tx_lvl = ((spi_sts >> 6) & 0x7f);
while (tx_lvl < 32 && out_bytes) {
temp = 0xffffffff;
writel(temp, &regs->tx_data);
out_bytes -= 4;
tx_lvl += 4;
}
while (rx_lvl >= 4 && in_bytes) {
temp = readl(&regs->rx_data);
if (rxp)
*rxp++ = temp;
in_bytes -= 4;
rx_lvl -= 4;
}
}
}
/*
* Copy uboot from spi flash to RAM
*
* @parma uboot_size size of u-boot to copy
* @param uboot_addr address in u-boot to copy
*/
static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
{
int upto, todo;
int i, timeout = 100;
struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE;
set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
/* set the spi1 GPIO */
exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
/* set pktcnt and enable it */
writel(4 | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
/* set FB_CLK_SEL */
writel(SPI_FB_DELAY_180, &regs->fb_clk);
/* set CH_WIDTH and BUS_WIDTH as word */
setbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
SPI_MODE_BUS_WIDTH_WORD);
clrbits_le32(&regs->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
/* clear rx and tx channel if set priveously */
clrbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
setbits_le32(&regs->swap_cfg, SPI_RX_SWAP_EN |
SPI_RX_BYTE_SWAP |
SPI_RX_HWORD_SWAP);
/* do a soft reset */
setbits_le32(&regs->ch_cfg, SPI_CH_RST);
clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
/* now set rx and tx channel ON */
setbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
clrbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
/* Send read instruction (0x3h) followed by a 24 bit addr */
writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, &regs->tx_data);
/* waiting for TX done */
while (!(readl(&regs->spi_sts) & SPI_ST_TX_DONE)) {
if (!timeout) {
debug("SPI TIMEOUT\n");
break;
}
timeout--;
}
for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
todo = min(uboot_size - upto, (unsigned int)(1 << 15));
spi_rx_tx(regs, todo, (void *)(uboot_addr),
(void *)(SPI_FLASH_UBOOT_POS), i);
}
setbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
/*
* Let put controller mode to BYTE as
* SPI driver does not support WORD mode yet
*/
clrbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
SPI_MODE_BUS_WIDTH_WORD);
writel(0, &regs->swap_cfg);
/*
* Flush spi tx, rx fifos and reset the SPI controller
* and clear rx/tx channel
*/
clrsetbits_le32(&regs->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
clrbits_le32(&regs->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
}
#endif
/*
* Copy U-boot from mmc to RAM:
* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
* Pointer to API (Data transfer from mmc to ram)
*/
void copy_uboot_to_ram(void)
{
unsigned int bootmode = BOOT_MODE_OM;
u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
u32 offset = 0, size = 0;
#ifdef CONFIG_SPI_BOOTING
struct spl_machine_param *param = spl_get_machine_params();
#endif
#ifdef CONFIG_SUPPORT_EMMC_BOOT
u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
void (*end_bootop_from_emmc)(void);
#endif
#ifdef CONFIG_USB_BOOTING
int is_cr_z_set;
unsigned int sec_boot_check;
/*
* Note that older hardware (before Exynos5800) does not expect any
* arguments, but it does not hurt to pass them, so a common function
* prototype is used.
*/
u32 (*usb_copy)(u32 num_of_block, u32 *dst);
/* Read iRAM location to check for secondary USB boot mode */
sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
bootmode = BOOT_MODE_USB;
#endif
if (bootmode == BOOT_MODE_OM)
bootmode = get_boot_mode();
switch (bootmode) {
#ifdef CONFIG_SPI_BOOTING
case BOOT_MODE_SERIAL:
/* Customised function to copy u-boot from SF */
exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE);
break;
#endif
case BOOT_MODE_SD:
offset = BL2_START_OFFSET;
size = BL2_SIZE_BLOC_COUNT;
copy_bl2 = get_irom_func(MMC_INDEX);
break;
#ifdef CONFIG_SUPPORT_EMMC_BOOT
case BOOT_MODE_EMMC:
/* Set the FSYS1 clock divisor value for EMMC boot */
emmc_boot_clk_div_set();
copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
end_bootop_from_emmc();
break;
#endif
#ifdef CONFIG_USB_BOOTING
case BOOT_MODE_USB:
/*
* iROM needs program flow prediction to be disabled
* before copy from USB device to RAM
*/
is_cr_z_set = config_branch_prediction(0);
usb_copy = get_irom_func(USB_INDEX);
usb_copy(0, (u32 *)CONFIG_SYS_TEXT_BASE);
config_branch_prediction(is_cr_z_set);
break;
#endif
default:
break;
}
if (copy_bl2)
copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
}
void memzero(void *s, size_t n)
{
char *ptr = s;
size_t i;
for (i = 0; i < n; i++)
*ptr++ = '\0';
}
/**
* Set up the U-Boot global_data pointer
*
* This sets the address of the global data, and sets up basic values.
*
* @param gdp Value to give to gd
*/
static void setup_global_data(gd_t *gdp)
{
gd = gdp;
memzero((void *)gd, sizeof(gd_t));
gd->flags |= GD_FLG_RELOC;
gd->baudrate = CONFIG_BAUDRATE;
gd->have_console = 1;
}
void board_init_f(unsigned long bootflag)
{
__aligned(8) gd_t local_gd;
__attribute__((noreturn)) void (*uboot)(void);
setup_global_data(&local_gd);
if (do_lowlevel_init())
power_exit_wakeup();
copy_uboot_to_ram();
/* Jump to U-Boot image */
uboot = (void *)CONFIG_SYS_TEXT_BASE;
(*uboot)();
/* Never returns Here */
}
/* Place Holders */
void board_init_r(gd_t *id, ulong dest_addr)
{
/* Function attribute is no-return */
/* This Function never executes */
while (1)
;
}
void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}