diff options
Diffstat (limited to 'src/cpu/samsung/exynos5-common/spl_boot.c')
| -rw-r--r-- | src/cpu/samsung/exynos5-common/spl_boot.c | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5-common/spl_boot.c b/src/cpu/samsung/exynos5-common/spl_boot.c new file mode 100644 index 0000000000..8ae051171e --- /dev/null +++ b/src/cpu/samsung/exynos5-common/spl_boot.c @@ -0,0 +1,460 @@ +/* + * Copyright (C) 2011 Samsung Electronics + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* FIXME(dhendrix): pulled in a lot of extra crap such as partition and string + libs*/ +#include <assert.h> +#include <common.h> +#include <stdlib.h> +#include <string.h> + +#include <console/console.h> +#include <console/loglevel.h> +//#include <asm/arch/board.h> + +#include <config.h> +#include <spi.h> +#if 0 +#include <asm/arch/clock.h> +#include <asm/arch-exynos/spi.h> +#include <asm/arch/pinmux.h> +#include <asm/arch/power.h> +#endif +#include <arch/hlt.h> +#include <cpu/samsung/exynos5250/clk.h> +#include <cpu/samsung/exynos5250/cpu.h> +#include <cpu/samsung/exynos5250/periph.h> +#include <cpu/samsung/exynos5250/pinmux.h> +#include <cpu/samsung/exynos5250/power.h> +#include <cpu/samsung/exynos5250/spi.h> + +#include <cpu/samsung/exynos5-common/cpu.h> +#include <cpu/samsung/exynos5-common/exynos5-common.h> + +//#include <asm/system.h> +#include <system.h> + +#include <arch/io.h> +#include <arch/types.h> + +/* FIXME(dhendrix): clean out u-boot global data stuff */ +//DECLARE_GLOBAL_DATA_PTR; + +#define OM_STAT (0x1f << 1) + +/** + * Copy data from SD or MMC device to RAM. + * + * @param offset Block offset of the data + * @param nblock Number of blocks + * @param dst Destination address + * @return 1 = True or 0 = False + */ +typedef u32 (*mmc_copy_func_t)(u32 offset, u32 nblock, u32 dst); + +/** + * Copy data from SPI flash to RAM. + * + * @param offset Block offset of the data + * @param nblock Number of blocks + * @param dst Destination address + * @return 1 = True or 0 = False + */ +typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst); + + +/** + * Copy data through USB. + * + * @return 1 = True or 0 = False + */ +typedef u32 (*usb_copy_func_t)(void); + +/* + * 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; +} + +#if 0 +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 = in_bytes = todo; + setbits_le32(®s->ch_cfg, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_CH_RST); + writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt); + + while (in_bytes) { + uint32_t spi_sts; + int temp; + + spi_sts = readl(®s->spi_sts); + rx_lvl = ((spi_sts >> 15) & 0x7f); + tx_lvl = ((spi_sts >> 6) & 0x7f); + while (tx_lvl < 32 && out_bytes) { + temp = 0xffffffff; + writel(temp, ®s->tx_data); + out_bytes -= 4; + tx_lvl += 4; + } + while (rx_lvl >= 4 && in_bytes) { + temp = readl(®s->rx_data); + if (rxp) + *rxp++ = temp; + in_bytes -= 4; + rx_lvl -= 4; + } + } +} +#endif + +/* FIXME(dhendrix): feels like exynos_spi_copy should go somewhere else... */ +#if 0 +/** + * Copy uboot from spi flash to RAM + * + * @parma uboot_size size of u-boot to copy + */ +static void exynos_spi_copy(unsigned int uboot_size) +{ + int upto, todo; + int i; +// struct exynos_spi *regs = (struct exynos_spi *)samsung_get_base_spi1(); + struct exynos_spi *regs = (struct exynos_spi *)0x12d30000; + + clock_set_rate(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, ®s->pkt_cnt); + /* set FB_CLK_SEL */ + writel(SPI_FB_DELAY_180, ®s->fb_clk); + /* set CH_WIDTH and BUS_WIDTH as word */ + setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD | + SPI_MODE_BUS_WIDTH_WORD); + clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */ + + /* clear rx and tx channel if set priveously */ + clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON); + + setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN | + SPI_RX_BYTE_SWAP | + SPI_RX_HWORD_SWAP); + + /* do a soft reset */ + setbits_le32(®s->ch_cfg, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_CH_RST); + + /* now set rx and tx channel ON */ + setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN); + clrbits_le32(®s->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, ®s->tx_data); + + /* waiting for TX done */ + while (!(readl(®s->spi_sts) & SPI_ST_TX_DONE)); + + for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) { + todo = MIN(uboot_size - upto, (1 << 15)); + spi_rx_tx(regs, todo, (void *)(CONFIG_SYS_TEXT_BASE), + (void *)(SPI_FLASH_UBOOT_POS), i); + } + + setbits_le32(®s->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(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD | + SPI_MODE_BUS_WIDTH_WORD); + writel(0, ®s->swap_cfg); + + /* + * Flush spi tx, rx fifos and reset the SPI controller + * and clear rx/tx channel + */ + clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON); +} +#endif + +/* Copy U-Boot image to RAM */ +static void copy_uboot_to_ram(void) +{ + unsigned int sec_boot_check; + unsigned int uboot_size = CONFIG_COREBOOT_ROMSIZE_KB_4096; + int is_cr_z_set; + enum boot_mode boot_mode = BOOT_MODE_OM; + mmc_copy_func_t mmc_copy; + + usb_copy_func_t usb_copy; + +#if 0 + uboot_size = exynos_get_uboot_size(); + boot_mode = exynos_get_boot_device(); +#endif + + if (boot_mode == BOOT_MODE_OM) { + /* 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) + boot_mode = BOOT_MODE_USB; + } + debug("U-Boot size %u\n", uboot_size); + + if (boot_mode == BOOT_MODE_OM) + boot_mode = readl(EXYNOS_POWER_BASE) & OM_STAT; + + switch (boot_mode) { +#if defined(CONFIG_EXYNOS_SPI_BOOT) + case BOOT_MODE_SERIAL: + /* let us our own function to copy u-boot from SF */ + exynos_spi_copy(uboot_size); + break; +#endif + case BOOT_MODE_MMC: + mmc_copy = *(mmc_copy_func_t *)EXYNOS_COPY_MMC_FNPTR_ADDR; + assert(!(uboot_size & 511)); + mmc_copy(BL2_START_OFFSET, uboot_size / 512, + CONFIG_SYS_TEXT_BASE); + break; + 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 = *(usb_copy_func_t *) + EXYNOS_COPY_USB_FNPTR_ADDR; + usb_copy(); + config_branch_prediction(is_cr_z_set); + break; + default: + printk(BIOS_ERR, "Invalid boot mode selection\n"); + hlt(); + break; + } + debug("U-Boot copied\n"); +} + +#if 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; +} +#endif + +#if 0 +/* Tell the loaded U-Boot that it was loaded from SPL */ +static void exynos5_set_spl_marker(void) +{ + uint32_t *marker = (uint32_t *)CONFIG_SPL_MARKER; + + *marker = EXYNOS5_SPL_MARKER; +} +#endif + +/* Board-specific call to see if wakeup is allowed. */ +static int __def_board_wakeup_permitted(void) +{ + return 1; +} +int board_wakeup_permitted(void) + __attribute__((weak, alias("__def_board_wakeup_permitted"))); + +void board_init_f(unsigned long bootflag) +{ + /* + * The gd struct is only needed for serial initialization. Since this + * function is called in SPL u-boot. We store the gd struct in the + * stack instead of the default memory region which may not be + * initialized. + */ +// __attribute__((aligned(8))) gd_t local_gd; +// __attribute__((noreturn)) void (*uboot)(void); + +// exynos5_set_spl_marker(); +// setup_global_data(&local_gd); + + /* + * Init subsystems, and resume if required. For a normal boot this + * will set up the UART and display a message. + */ + if (lowlevel_init_subsystems()) { + if (!board_wakeup_permitted()) + power_reset(); + power_exit_wakeup(); + } + +// printk(BIOS_INFO, "\n\nU-Boot SPL, board rev %u\n", board_get_revision()); + + copy_uboot_to_ram(); + /* Jump to U-Boot image */ +// uboot = (void *)CONFIG_SYS_TEXT_BASE; +// uboot(); + /* Never returns Here */ +// printk(BIOS_ERR, "%s: u-boot jump failed", __func__); + printk(BIOS_INFO, "%s: we should not be here...", __func__); + hlt(); +} + +/* 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) {} + +#if 0 +/* + * The following functions are required when linking console library to SPL. + * + * Enabling UART in SPL u-boot requires console library. But some + * functions we needed in the console library depends on a bunch + * of library in libgeneric, like lib/ctype.o, lib/div64.o, lib/string.o, + * and lib/vsprintf.o. Adding them makes the SPL u-boot too large and not + * fit into the expected size. + * + * So we mock these functions in SPL, i.e. vsprintf(), panic(), etc., + * in order to cut its dependency. + */ +int vsprintf(char *buf, const char *fmt, va_list args) +{ + char *str = buf, *s; + ulong u; + + /* + * We won't implement all full functions of vsprintf(). + * We only implement %s and %u, and ignore others and directly use + * the original format string as its result. + */ + + while (*fmt) { + if (*fmt != '%') { + *str++ = *fmt++; + continue; + } + fmt++; + switch (*fmt) { + case '%': + *str++ = *fmt++; + break; + case 's': + fmt++; + s = va_arg(args, char *); + while (*s) + *str++ = *s++; + break; + case 'u': + fmt++; + u = va_arg(args, ulong); + s = simple_itoa(u); + while (*s) + *str++ = *s++; + break; + default: + /* Print the original string for unsupported formats */ + *str++ = '%'; + *str++ = *fmt++; + } + } + *str = '\0'; + return str - buf; +} +#endif + +#if 0 +void panic(const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + vprintf(fmt, args); + putc('\n'); + va_end(args); +#if defined(CONFIG_PANIC_HANG) + hang(); +#else + udelay(100000); /* allow messages to go out */ + do_reset(NULL, 0, 0, NULL); +#endif + while (1) + ; +} +#endif + +#if 0 +void __assert_fail(const char *assertion, const char *file, unsigned line, + const char *function) +{ + /* This will not return */ + panic("%s:%u: %s: Assertion `%s' failed.", file, line, function, + assertion); +} +#endif + +#if 0 +char *simple_itoa(ulong i) +{ + /* 21 digits plus null terminator, good for 64-bit or smaller ints */ + static char local[22] __attribute__((section(".data"))); + char *p = &local[21]; + + *p-- = '\0'; + do { + *p-- = '0' + i % 10; + i /= 10; + } while (i > 0); + return p + 1; +} +#endif |