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Diffstat (limited to 'arch/arm/lib/board.c')
| -rw-r--r-- | arch/arm/lib/board.c | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c new file mode 100644 index 0000000..09ab4ad --- /dev/null +++ b/arch/arm/lib/board.c @@ -0,0 +1,708 @@ +/* + * (C) Copyright 2002-2006 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * 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 + */ + +/* + * To match the U-Boot user interface on ARM platforms to the U-Boot + * standard (as on PPC platforms), some messages with debug character + * are removed from the default U-Boot build. + * + * Define DEBUG here if you want additional info as shown below + * printed upon startup: + * + * U-Boot code: 00F00000 -> 00F3C774 BSS: -> 00FC3274 + * IRQ Stack: 00ebff7c + * FIQ Stack: 00ebef7c + */ + +#include <common.h> +#include <command.h> +#include <environment.h> +#include <malloc.h> +#include <stdio_dev.h> +#include <version.h> +#include <net.h> +#include <serial.h> +#include <nand.h> +#include <onenand_uboot.h> +#include <mmc.h> +#include <libfdt.h> +#include <fdtdec.h> +#include <post.h> +#include <logbuff.h> +#include <asm/sections.h> + +#ifdef CONFIG_BITBANGMII +#include <miiphy.h> +#endif + +DECLARE_GLOBAL_DATA_PTR; + +ulong monitor_flash_len; + +#ifdef CONFIG_HAS_DATAFLASH +extern int AT91F_DataflashInit(void); +extern void dataflash_print_info(void); +#endif + +#if defined(CONFIG_HARD_I2C) || \ + defined(CONFIG_SOFT_I2C) +#include <i2c.h> +#endif + +/************************************************************************ + * Coloured LED functionality + ************************************************************************ + * May be supplied by boards if desired + */ +inline void __coloured_LED_init(void) {} +void coloured_LED_init(void) + __attribute__((weak, alias("__coloured_LED_init"))); +inline void __red_led_on(void) {} +void red_led_on(void) __attribute__((weak, alias("__red_led_on"))); +inline void __red_led_off(void) {} +void red_led_off(void) __attribute__((weak, alias("__red_led_off"))); +inline void __green_led_on(void) {} +void green_led_on(void) __attribute__((weak, alias("__green_led_on"))); +inline void __green_led_off(void) {} +void green_led_off(void) __attribute__((weak, alias("__green_led_off"))); +inline void __yellow_led_on(void) {} +void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on"))); +inline void __yellow_led_off(void) {} +void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off"))); +inline void __blue_led_on(void) {} +void blue_led_on(void) __attribute__((weak, alias("__blue_led_on"))); +inline void __blue_led_off(void) {} +void blue_led_off(void) __attribute__((weak, alias("__blue_led_off"))); + +/* + ************************************************************************ + * Init Utilities * + ************************************************************************ + * Some of this code should be moved into the core functions, + * or dropped completely, + * but let's get it working (again) first... + */ + +#if defined(CONFIG_ARM_DCC) && !defined(CONFIG_BAUDRATE) +#define CONFIG_BAUDRATE 115200 +#endif + +static int init_baudrate(void) +{ + gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE); + return 0; +} + +static int display_banner(void) +{ + printf("\n\n%s\n\n", version_string); + debug("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n", + _TEXT_BASE, + _bss_start_ofs + _TEXT_BASE, _bss_end_ofs + _TEXT_BASE); +#ifdef CONFIG_MODEM_SUPPORT + debug("Modem Support enabled\n"); +#endif +#ifdef CONFIG_USE_IRQ + debug("IRQ Stack: %08lx\n", IRQ_STACK_START); + debug("FIQ Stack: %08lx\n", FIQ_STACK_START); +#endif + + return (0); +} + +/* + * WARNING: this code looks "cleaner" than the PowerPC version, but + * has the disadvantage that you either get nothing, or everything. + * On PowerPC, you might see "DRAM: " before the system hangs - which + * gives a simple yet clear indication which part of the + * initialization if failing. + */ +static int display_dram_config(void) +{ + int i; + +#ifdef DEBUG + puts("RAM Configuration:\n"); + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { + printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); + print_size(gd->bd->bi_dram[i].size, "\n"); + } +#else + ulong size = 0; + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) + size += gd->bd->bi_dram[i].size; + + puts("DRAM: "); + print_size(size, "\n"); +#endif + + return (0); +} + +#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) +static int init_func_i2c(void) +{ + puts("I2C: "); + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + puts("ready\n"); + return (0); +} +#endif + +#if defined(CONFIG_CMD_PCI) || defined (CONFIG_PCI) +#include <pci.h> +static int arm_pci_init(void) +{ + pci_init(); + return 0; +} +#endif /* CONFIG_CMD_PCI || CONFIG_PCI */ + +/* + * Breathe some life into the board... + * + * Initialize a serial port as console, and carry out some hardware + * tests. + * + * The first part of initialization is running from Flash memory; + * its main purpose is to initialize the RAM so that we + * can relocate the monitor code to RAM. + */ + +/* + * All attempts to come up with a "common" initialization sequence + * that works for all boards and architectures failed: some of the + * requirements are just _too_ different. To get rid of the resulting + * mess of board dependent #ifdef'ed code we now make the whole + * initialization sequence configurable to the user. + * + * The requirements for any new initalization function is simple: it + * receives a pointer to the "global data" structure as it's only + * argument, and returns an integer return code, where 0 means + * "continue" and != 0 means "fatal error, hang the system". + */ +typedef int (init_fnc_t) (void); + +int print_cpuinfo(void); + +void __dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; + gd->bd->bi_dram[0].size = gd->ram_size; +} +void dram_init_banksize(void) + __attribute__((weak, alias("__dram_init_banksize"))); + +int __arch_cpu_init(void) +{ + return 0; +} +int arch_cpu_init(void) + __attribute__((weak, alias("__arch_cpu_init"))); + +int __power_init_board(void) +{ + return 0; +} +int power_init_board(void) + __attribute__((weak, alias("__power_init_board"))); + + /* Record the board_init_f() bootstage (after arch_cpu_init()) */ +static int mark_bootstage(void) +{ + bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f"); + + return 0; +} + +init_fnc_t *init_sequence[] = { + arch_cpu_init, /* basic arch cpu dependent setup */ + mark_bootstage, +#ifdef CONFIG_OF_CONTROL + fdtdec_check_fdt, +#endif +#if defined(CONFIG_BOARD_EARLY_INIT_F) + board_early_init_f, +#endif + timer_init, /* initialize timer */ +#ifdef CONFIG_BOARD_POSTCLK_INIT + board_postclk_init, +#endif +#ifdef CONFIG_FSL_ESDHC + get_clocks, +#endif + env_init, /* initialize environment */ + init_baudrate, /* initialze baudrate settings */ + serial_init, /* serial communications setup */ + console_init_f, /* stage 1 init of console */ + display_banner, /* say that we are here */ +#if defined(CONFIG_DISPLAY_CPUINFO) + print_cpuinfo, /* display cpu info (and speed) */ +#endif +#if defined(CONFIG_DISPLAY_BOARDINFO) + checkboard, /* display board info */ +#endif +#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) + init_func_i2c, +#endif + dram_init, /* configure available RAM banks */ + NULL, +}; + +void board_init_f(ulong bootflag) +{ + bd_t *bd; + init_fnc_t **init_fnc_ptr; + gd_t *id; + ulong addr, addr_sp; +#ifdef CONFIG_PRAM + ulong reg; +#endif + void *new_fdt = NULL; + size_t fdt_size = 0; + + memset((void *)gd, 0, sizeof(gd_t)); + + gd->mon_len = _bss_end_ofs; +#ifdef CONFIG_OF_EMBED + /* Get a pointer to the FDT */ + gd->fdt_blob = _binary_dt_dtb_start; +#elif defined CONFIG_OF_SEPARATE + /* FDT is at end of image */ + gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE); +#endif + /* Allow the early environment to override the fdt address */ + gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, + (uintptr_t)gd->fdt_blob); + + for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { + if ((*init_fnc_ptr)() != 0) { + hang (); + } + } + +#ifdef CONFIG_OF_CONTROL + /* For now, put this check after the console is ready */ + if (fdtdec_prepare_fdt()) { + panic("** CONFIG_OF_CONTROL defined but no FDT - please see " + "doc/README.fdt-control"); + } +#endif + + debug("monitor len: %08lX\n", gd->mon_len); + /* + * Ram is setup, size stored in gd !! + */ + debug("ramsize: %08lX\n", gd->ram_size); +#if defined(CONFIG_SYS_MEM_TOP_HIDE) + /* + * Subtract specified amount of memory to hide so that it won't + * get "touched" at all by U-Boot. By fixing up gd->ram_size + * the Linux kernel should now get passed the now "corrected" + * memory size and won't touch it either. This should work + * for arch/ppc and arch/powerpc. Only Linux board ports in + * arch/powerpc with bootwrapper support, that recalculate the + * memory size from the SDRAM controller setup will have to + * get fixed. + */ + gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE; +#endif + + addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size; + +#ifdef CONFIG_LOGBUFFER +#ifndef CONFIG_ALT_LB_ADDR + /* reserve kernel log buffer */ + addr -= (LOGBUFF_RESERVE); + debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, + addr); +#endif +#endif + +#ifdef CONFIG_PRAM + /* + * reserve protected RAM + */ + reg = getenv_ulong("pram", 10, CONFIG_PRAM); + addr -= (reg << 10); /* size is in kB */ + debug("Reserving %ldk for protected RAM at %08lx\n", reg, addr); +#endif /* CONFIG_PRAM */ + +#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) + /* reserve TLB table */ + gd->arch.tlb_size = 4096 * 4; + addr -= gd->arch.tlb_size; + + /* round down to next 64 kB limit */ + addr &= ~(0x10000 - 1); + + gd->arch.tlb_addr = addr; + debug("TLB table from %08lx to %08lx\n", addr, addr + gd->arch.tlb_size); +#endif + + /* round down to next 4 kB limit */ + addr &= ~(4096 - 1); + debug("Top of RAM usable for U-Boot at: %08lx\n", addr); + +#ifdef CONFIG_LCD +#ifdef CONFIG_FB_ADDR + gd->fb_base = CONFIG_FB_ADDR; +#else + /* reserve memory for LCD display (always full pages) */ + addr = lcd_setmem(addr); + gd->fb_base = addr; +#endif /* CONFIG_FB_ADDR */ +#endif /* CONFIG_LCD */ + + /* + * reserve memory for U-Boot code, data & bss + * round down to next 4 kB limit + */ + addr -= gd->mon_len; + addr &= ~(4096 - 1); + + debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10, addr); + +#ifndef CONFIG_SPL_BUILD + /* + * reserve memory for malloc() arena + */ + addr_sp = addr - TOTAL_MALLOC_LEN; + debug("Reserving %dk for malloc() at: %08lx\n", + TOTAL_MALLOC_LEN >> 10, addr_sp); + /* + * (permanently) allocate a Board Info struct + * and a permanent copy of the "global" data + */ + addr_sp -= sizeof (bd_t); + bd = (bd_t *) addr_sp; + gd->bd = bd; + debug("Reserving %zu Bytes for Board Info at: %08lx\n", + sizeof (bd_t), addr_sp); + +#ifdef CONFIG_MACH_TYPE + gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */ +#endif + + addr_sp -= sizeof (gd_t); + id = (gd_t *) addr_sp; + debug("Reserving %zu Bytes for Global Data at: %08lx\n", + sizeof (gd_t), addr_sp); + +#if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL) + /* + * If the device tree is sitting immediate above our image then we + * must relocate it. If it is embedded in the data section, then it + * will be relocated with other data. + */ + if (gd->fdt_blob) { + fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32); + + addr_sp -= fdt_size; + new_fdt = (void *)addr_sp; + debug("Reserving %zu Bytes for FDT at: %08lx\n", + fdt_size, addr_sp); + } +#endif + + /* setup stackpointer for exeptions */ + gd->irq_sp = addr_sp; +#ifdef CONFIG_USE_IRQ + addr_sp -= (CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ); + debug("Reserving %zu Bytes for IRQ stack at: %08lx\n", + CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ, addr_sp); +#endif + /* leave 3 words for abort-stack */ + addr_sp -= 12; + + /* 8-byte alignment for ABI compliance */ + addr_sp &= ~0x07; +#else + addr_sp += 128; /* leave 32 words for abort-stack */ + gd->irq_sp = addr_sp; +#endif + + debug("New Stack Pointer is: %08lx\n", addr_sp); + +#ifdef CONFIG_POST + post_bootmode_init(); + post_run(NULL, POST_ROM | post_bootmode_get(0)); +#endif + + gd->bd->bi_baudrate = gd->baudrate; + /* Ram ist board specific, so move it to board code ... */ + dram_init_banksize(); + display_dram_config(); /* and display it */ + + gd->relocaddr = addr; + gd->start_addr_sp = addr_sp; + gd->reloc_off = addr - _TEXT_BASE; + debug("relocation Offset is: %08lx\n", gd->reloc_off); + if (new_fdt) { + memcpy(new_fdt, gd->fdt_blob, fdt_size); + gd->fdt_blob = new_fdt; + } + memcpy(id, (void *)gd, sizeof(gd_t)); +} + +#if !defined(CONFIG_SYS_NO_FLASH) +static char *failed = "*** failed ***\n"; +#endif + +/* + * Tell if it's OK to load the environment early in boot. + * + * If CONFIG_OF_CONFIG is defined, we'll check with the FDT to see + * if this is OK (defaulting to saying it's not OK). + * + * NOTE: Loading the environment early can be a bad idea if security is + * important, since no verification is done on the environment. + * + * @return 0 if environment should not be loaded, !=0 if it is ok to load + */ +static int should_load_env(void) +{ +#ifdef CONFIG_OF_CONTROL + return fdtdec_get_config_int(gd->fdt_blob, "load-environment", 1); +#elif defined CONFIG_DELAY_ENVIRONMENT + return 0; +#else + return 1; +#endif +} + +#if defined(CONFIG_DISPLAY_BOARDINFO_LATE) && defined(CONFIG_OF_CONTROL) +static void display_fdt_model(const void *blob) +{ + const char *model; + + model = (char *)fdt_getprop(blob, 0, "model", NULL); + printf("Model: %s\n", model ? model : "<unknown>"); +} +#endif + +/************************************************************************ + * + * This is the next part if the initialization sequence: we are now + * running from RAM and have a "normal" C environment, i. e. global + * data can be written, BSS has been cleared, the stack size in not + * that critical any more, etc. + * + ************************************************************************ + */ + +void board_init_r(gd_t *id, ulong dest_addr) +{ + ulong malloc_start; +#if !defined(CONFIG_SYS_NO_FLASH) + ulong flash_size; +#endif + + gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */ + bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r"); + + monitor_flash_len = _end_ofs; + + /* Enable caches */ + enable_caches(); + + debug("monitor flash len: %08lX\n", monitor_flash_len); + board_init(); /* Setup chipselects */ + /* + * TODO: printing of the clock inforamtion of the board is now + * implemented as part of bdinfo command. Currently only support for + * davinci SOC's is added. Remove this check once all the board + * implement this. + */ +#ifdef CONFIG_CLOCKS + set_cpu_clk_info(); /* Setup clock information */ +#endif + serial_initialize(); + + debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr); + +#ifdef CONFIG_LOGBUFFER + logbuff_init_ptrs(); +#endif +#ifdef CONFIG_POST + post_output_backlog(); +#endif + + /* The Malloc area is immediately below the monitor copy in DRAM */ + malloc_start = dest_addr - TOTAL_MALLOC_LEN; + mem_malloc_init (malloc_start, TOTAL_MALLOC_LEN); + +#ifdef CONFIG_ARCH_EARLY_INIT_R + arch_early_init_r(); +#endif + power_init_board(); + +#if !defined(CONFIG_SYS_NO_FLASH) + puts("Flash: "); + + flash_size = flash_init(); + if (flash_size > 0) { +# ifdef CONFIG_SYS_FLASH_CHECKSUM + print_size(flash_size, ""); + /* + * Compute and print flash CRC if flashchecksum is set to 'y' + * + * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX + */ + if (getenv_yesno("flashchecksum") == 1) { + printf(" CRC: %08X", crc32(0, + (const unsigned char *) CONFIG_SYS_FLASH_BASE, + flash_size)); + } + putc('\n'); +# else /* !CONFIG_SYS_FLASH_CHECKSUM */ + print_size(flash_size, "\n"); +# endif /* CONFIG_SYS_FLASH_CHECKSUM */ + } else { + puts(failed); + hang(); + } +#endif + +#if defined(CONFIG_CMD_NAND) + puts("NAND: "); + nand_init(); /* go init the NAND */ +#endif + +#if defined(CONFIG_CMD_ONENAND) + onenand_init(); +#endif + +#ifdef CONFIG_GENERIC_MMC + puts("MMC: "); + mmc_initialize(gd->bd); +#endif + +#ifdef CONFIG_HAS_DATAFLASH + AT91F_DataflashInit(); + dataflash_print_info(); +#endif + + /* initialize environment */ + if (should_load_env()) + env_relocate(); + else + set_default_env(NULL); + +#if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI) + arm_pci_init(); +#endif + + stdio_init(); /* get the devices list going. */ + + jumptable_init(); + +#if defined(CONFIG_API) + /* Initialize API */ + api_init(); +#endif + + console_init_r(); /* fully init console as a device */ + +#ifdef CONFIG_DISPLAY_BOARDINFO_LATE +# ifdef CONFIG_OF_CONTROL + /* Put this here so it appears on the LCD, now it is ready */ + display_fdt_model(gd->fdt_blob); +# else + checkboard(); +# endif +#endif + +#if defined(CONFIG_ARCH_MISC_INIT) + /* miscellaneous arch dependent initialisations */ + arch_misc_init(); +#endif +#if defined(CONFIG_MISC_INIT_R) + /* miscellaneous platform dependent initialisations */ + misc_init_r(); +#endif + + /* set up exceptions */ + interrupt_init(); + /* enable exceptions */ + enable_interrupts(); + + /* Initialize from environment */ + load_addr = getenv_ulong("loadaddr", 16, load_addr); + +#ifdef CONFIG_BOARD_LATE_INIT + board_late_init(); +#endif + +#ifdef CONFIG_BITBANGMII + bb_miiphy_init(); +#endif +#if defined(CONFIG_CMD_NET) + puts("Net: "); + eth_initialize(gd->bd); +#if defined(CONFIG_RESET_PHY_R) + debug("Reset Ethernet PHY\n"); + reset_phy(); +#endif +#endif + +#ifdef CONFIG_POST + post_run(NULL, POST_RAM | post_bootmode_get(0)); +#endif + +#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER) + /* + * Export available size of memory for Linux, + * taking into account the protected RAM at top of memory + */ + { + ulong pram = 0; + uchar memsz[32]; + +#ifdef CONFIG_PRAM + pram = getenv_ulong("pram", 10, CONFIG_PRAM); +#endif +#ifdef CONFIG_LOGBUFFER +#ifndef CONFIG_ALT_LB_ADDR + /* Also take the logbuffer into account (pram is in kB) */ + pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024; +#endif +#endif + sprintf((char *)memsz, "%ldk", (gd->ram_size / 1024) - pram); + setenv("mem", (char *)memsz); + } +#endif + + /* main_loop() can return to retry autoboot, if so just run it again. */ + for (;;) { + main_loop(); + } + + /* NOTREACHED - no way out of command loop except booting */ +} |
