X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv7%2Fsunxi%2Fboard.c;h=c02c0150960c2be2ee2324c680d86d258f09b4f2;hb=ebd468b2d26660ff7811e37cc64fa2369d4b5fff;hp=06eb6768e8f2b58ddbe1b2408157f8e4e89ccaab;hpb=674ca84d11391cd2e7faf8f638fc25ed4b782a91;p=oweals%2Fu-boot.git diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c index 06eb6768e8..c02c015096 100644 --- a/arch/arm/cpu/armv7/sunxi/board.c +++ b/arch/arm/cpu/armv7/sunxi/board.c @@ -27,31 +27,21 @@ #include -#ifdef CONFIG_SPL_BUILD -/* Pointer to the global data structure for SPL */ -DECLARE_GLOBAL_DATA_PTR; - -/* The sunxi internal brom will try to loader external bootloader - * from mmc0, nand flash, mmc2. - * Unfortunately we can't check how SPL was loaded so assume - * it's always the first SD/MMC controller - */ -u32 spl_boot_device(void) -{ - return BOOT_DEVICE_MMC1; -} - -/* No confirmation data available in SPL yet. Hardcode bootmode */ -u32 spl_boot_mode(void) -{ - return MMCSD_MODE_RAW; -} -#endif - -int gpio_init(void) +struct fel_stash { + uint32_t sp; + uint32_t lr; + uint32_t cpsr; + uint32_t sctlr; + uint32_t vbar; + uint32_t cr; +}; + +struct fel_stash fel_stash __attribute__((section(".data"))); + +static int gpio_init(void) { #if CONFIG_CONS_INDEX == 1 && defined(CONFIG_UART0_PORT_F) -#if defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I) +#if defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN7I) /* disable GPB22,23 as uart0 tx,rx to avoid conflict */ sunxi_gpio_set_cfgpin(SUNXI_GPB(22), SUNXI_GPIO_INPUT); sunxi_gpio_set_cfgpin(SUNXI_GPB(23), SUNXI_GPIO_INPUT); @@ -59,23 +49,23 @@ int gpio_init(void) sunxi_gpio_set_cfgpin(SUNXI_GPF(2), SUNXI_GPF2_UART0_TX); sunxi_gpio_set_cfgpin(SUNXI_GPF(4), SUNXI_GPF4_UART0_RX); sunxi_gpio_set_pull(SUNXI_GPF(4), 1); -#elif CONFIG_CONS_INDEX == 1 && (defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I)) +#elif CONFIG_CONS_INDEX == 1 && (defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN7I)) sunxi_gpio_set_cfgpin(SUNXI_GPB(22), SUN4I_GPB22_UART0_TX); sunxi_gpio_set_cfgpin(SUNXI_GPB(23), SUN4I_GPB23_UART0_RX); sunxi_gpio_set_pull(SUNXI_GPB(23), SUNXI_GPIO_PULL_UP); -#elif CONFIG_CONS_INDEX == 1 && defined(CONFIG_SUN5I) +#elif CONFIG_CONS_INDEX == 1 && defined(CONFIG_MACH_SUN5I) sunxi_gpio_set_cfgpin(SUNXI_GPB(19), SUN5I_GPB19_UART0_TX); sunxi_gpio_set_cfgpin(SUNXI_GPB(20), SUN5I_GPB20_UART0_RX); sunxi_gpio_set_pull(SUNXI_GPB(20), SUNXI_GPIO_PULL_UP); -#elif CONFIG_CONS_INDEX == 1 && defined(CONFIG_SUN6I) +#elif CONFIG_CONS_INDEX == 1 && defined(CONFIG_MACH_SUN6I) sunxi_gpio_set_cfgpin(SUNXI_GPH(20), SUN6I_GPH20_UART0_TX); sunxi_gpio_set_cfgpin(SUNXI_GPH(21), SUN6I_GPH21_UART0_RX); sunxi_gpio_set_pull(SUNXI_GPH(21), SUNXI_GPIO_PULL_UP); -#elif CONFIG_CONS_INDEX == 2 && defined(CONFIG_SUN5I) +#elif CONFIG_CONS_INDEX == 2 && defined(CONFIG_MACH_SUN5I) sunxi_gpio_set_cfgpin(SUNXI_GPG(3), SUN5I_GPG3_UART1_TX); sunxi_gpio_set_cfgpin(SUNXI_GPG(4), SUN5I_GPG4_UART1_RX); sunxi_gpio_set_pull(SUNXI_GPG(4), SUNXI_GPIO_PULL_UP); -#elif CONFIG_CONS_INDEX == 5 && defined(CONFIG_SUN8I) +#elif CONFIG_CONS_INDEX == 5 && defined(CONFIG_MACH_SUN8I) sunxi_gpio_set_cfgpin(SUNXI_GPL(2), SUN8I_GPL2_R_UART_TX); sunxi_gpio_set_cfgpin(SUNXI_GPL(3), SUN8I_GPL3_R_UART_RX); sunxi_gpio_set_pull(SUNXI_GPL(3), SUNXI_GPIO_PULL_UP); @@ -86,36 +76,21 @@ int gpio_init(void) return 0; } -void reset_cpu(ulong addr) +void spl_board_load_image(void) { -#if defined(CONFIG_SUN4I) || defined(CONFIG_SUN5I) || defined(CONFIG_SUN7I) - static const struct sunxi_wdog *wdog = - &((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog; - - /* Set the watchdog for its shortest interval (.5s) and wait */ - writel(WDT_MODE_RESET_EN | WDT_MODE_EN, &wdog->mode); - writel(WDT_CTRL_KEY | WDT_CTRL_RESTART, &wdog->ctl); - - while (1) { - /* sun5i sometimes gets stuck without this */ - writel(WDT_MODE_RESET_EN | WDT_MODE_EN, &wdog->mode); - } -#else /* CONFIG_SUN6I || CONFIG_SUN8I || .. */ - static const struct sunxi_wdog *wdog = - ((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog; - - /* Set the watchdog for its shortest interval (.5s) and wait */ - writel(WDT_CFG_RESET, &wdog->cfg); - writel(WDT_MODE_EN, &wdog->mode); - writel(WDT_CTRL_KEY | WDT_CTRL_RESTART, &wdog->ctl); -#endif + debug("Returning to FEL sp=%x, lr=%x\n", fel_stash.sp, fel_stash.lr); + return_to_fel(fel_stash.sp, fel_stash.lr); } -/* do some early init */ void s_init(void) { -#if !defined CONFIG_SPL_BUILD && (defined CONFIG_SUN7I || \ - defined CONFIG_SUN6I || defined CONFIG_SUN8I) +#if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I + /* Magic (undocmented) value taken from boot0, without this DRAM + * access gets messed up (seems cache related) */ + setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800); +#endif +#if !defined CONFIG_SPL_BUILD && (defined CONFIG_MACH_SUN7I || \ + defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I) /* Enable SMP mode for CPU0, by setting bit 6 of Auxiliary Ctl reg */ asm volatile( "mrc p15, 0, r0, c1, c0, 1\n" @@ -127,9 +102,54 @@ void s_init(void) timer_init(); gpio_init(); i2c_init_board(); +} #ifdef CONFIG_SPL_BUILD - gd = &gdata; +/* The sunxi internal brom will try to loader external bootloader + * from mmc0, nand flash, mmc2. + * Unfortunately we can't check how SPL was loaded so assume + * it's always the first SD/MMC controller + */ +u32 spl_boot_device(void) +{ +#ifdef CONFIG_SPL_FEL + /* + * This is the legacy compile time configuration for a special FEL + * enabled build. It has many restrictions and can only boot over USB. + */ + return BOOT_DEVICE_BOARD; +#else + /* + * When booting from the SD card, the "eGON.BT0" signature is expected + * to be found in memory at the address 0x0004 (see the "mksunxiboot" + * tool, which generates this header). + * + * When booting in the FEL mode over USB, this signature is patched in + * memory and replaced with something else by the 'fel' tool. This other + * signature is selected in such a way, that it can't be present in a + * valid bootable SD card image (because the BROM would refuse to + * execute the SPL in this case). + * + * This branch is just making a decision at runtime whether to load + * the main u-boot binary from the SD card (if the "eGON.BT0" signature + * is found) or return to the FEL code in the BROM to wait and receive + * the main u-boot binary over USB. + */ + if (readl(4) == 0x4E4F4765 && readl(8) == 0x3054422E) /* eGON.BT0 */ + return BOOT_DEVICE_MMC1; + else + return BOOT_DEVICE_BOARD; +#endif +} + +/* No confirmation data available in SPL yet. Hardcode bootmode */ +u32 spl_boot_mode(void) +{ + return MMCSD_MODE_RAW; +} + +void board_init_f(ulong dummy) +{ preloader_console_init(); #ifdef CONFIG_SPL_I2C_SUPPORT @@ -137,6 +157,36 @@ void s_init(void) i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); #endif sunxi_board_init(); + + /* Clear the BSS. */ + memset(__bss_start, 0, __bss_end - __bss_start); + + board_init_r(NULL, 0); +} +#endif + +void reset_cpu(ulong addr) +{ +#if defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I) + static const struct sunxi_wdog *wdog = + &((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog; + + /* Set the watchdog for its shortest interval (.5s) and wait */ + writel(WDT_MODE_RESET_EN | WDT_MODE_EN, &wdog->mode); + writel(WDT_CTRL_KEY | WDT_CTRL_RESTART, &wdog->ctl); + + while (1) { + /* sun5i sometimes gets stuck without this */ + writel(WDT_MODE_RESET_EN | WDT_MODE_EN, &wdog->mode); + } +#else /* CONFIG_MACH_SUN6I || CONFIG_MACH_SUN8I || .. */ + static const struct sunxi_wdog *wdog = + ((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog; + + /* Set the watchdog for its shortest interval (.5s) and wait */ + writel(WDT_CFG_RESET, &wdog->cfg); + writel(WDT_MODE_EN, &wdog->mode); + writel(WDT_CTRL_KEY | WDT_CTRL_RESTART, &wdog->ctl); #endif }