diff options
author | Thomas Fitzsimmons <fitzsim@fitzsim.org> | 2018-06-08 17:59:45 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2018-07-10 16:55:57 -0400 |
commit | 894c3ad27fa940beb7fdc07d01dcfe81c03d0481 (patch) | |
tree | 72abb68850e0fc01f0fd0c6f0c2152afda435ffd /board/broadcom/bcmstb/bcmstb.c | |
parent | d154ca60036f060375ff3d80b2f1fbd2cd7de115 (diff) | |
download | u-boot-894c3ad27fa940beb7fdc07d01dcfe81c03d0481.tar.gz |
board: arm: Add support for Broadcom BCM7445
Add support for loading U-Boot on the Broadcom 7445 SoC. This port
assumes Broadcom's BOLT bootloader is acting as the second stage
bootloader, and U-Boot is acting as the third stage bootloader, loaded
as an ELF program by BOLT.
Signed-off-by: Thomas Fitzsimmons <fitzsim@fitzsim.org>
Cc: Stefan Roese <sr@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'board/broadcom/bcmstb/bcmstb.c')
-rw-r--r-- | board/broadcom/bcmstb/bcmstb.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/board/broadcom/bcmstb/bcmstb.c b/board/broadcom/bcmstb/bcmstb.c new file mode 100644 index 0000000000..25cd354998 --- /dev/null +++ b/board/broadcom/bcmstb/bcmstb.c @@ -0,0 +1,194 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2018 Cisco Systems, Inc. + * + * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org> + */ + +#include <linux/types.h> +#include <common.h> +#include <asm/io.h> +#include <asm/bootm.h> +#include <mach/sdhci.h> +#include <mach/timer.h> +#include <mmc.h> +#include <fdtdec.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define BCMSTB_DATA_SECTION __attribute__((section(".data"))) + +struct bcmstb_boot_parameters bcmstb_boot_parameters BCMSTB_DATA_SECTION; + +phys_addr_t prior_stage_fdt_address BCMSTB_DATA_SECTION; + +union reg_value_union { + const char *data; + const phys_addr_t *address; +}; + +int board_init(void) +{ + return 0; +} + +u32 get_board_rev(void) +{ + return 0; +} + +void reset_cpu(ulong ignored) +{ +} + +int print_cpuinfo(void) +{ + return 0; +} + +int dram_init(void) +{ + if (fdtdec_setup_memory_size() != 0) + return -EINVAL; + + return 0; +} + +int dram_init_banksize(void) +{ + fdtdec_setup_memory_banksize(); + + /* + * On this SoC, U-Boot is running as an ELF file. Change the + * relocation address to CONFIG_SYS_TEXT_BASE, so that in + * setup_reloc, gd->reloc_off works out to 0, effectively + * disabling relocation. Otherwise U-Boot hangs in the setup + * instructions just before relocate_code in + * arch/arm/lib/crt0.S. + */ + gd->relocaddr = CONFIG_SYS_TEXT_BASE; + + return 0; +} + +void enable_caches(void) +{ + /* + * This port assumes that the prior stage bootloader has + * enabled I-cache and D-cache already. Implementing this + * function silences the warning in the default function. + */ +} + +static const phys_addr_t bcmstb_sdhci_address(u32 alias_index) +{ + int node = 0; + int ret = 0; + char sdhci[16] = { 0 }; + const void *fdt = gd->fdt_blob; + const char *path = NULL; + struct fdt_resource resource = { 0 }; + + if (!fdt) { + printf("%s: Invalid gd->fdt_blob\n", __func__); + return 0; + } + + node = fdt_path_offset(fdt, "/aliases"); + if (node < 0) { + printf("%s: Failed to find /aliases node\n", __func__); + return 0; + } + + sprintf(sdhci, "sdhci%d", alias_index); + path = fdt_getprop(fdt, node, sdhci, NULL); + if (!path) { + printf("%s: Failed to find alias for %s\n", __func__, sdhci); + return 0; + } + + node = fdt_path_offset(fdt, path); + if (node < 0) { + printf("%s: Failed to resolve BCMSTB SDHCI alias\n", __func__); + return 0; + } + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "host", &resource); + if (ret) { + printf("%s: Failed to read BCMSTB SDHCI host resource\n", + __func__); + return 0; + } + + return resource.start; +} + +int board_mmc_init(bd_t *bis) +{ + phys_addr_t sdhci_base_address = 0; + + sdhci_base_address = bcmstb_sdhci_address(CONFIG_BCMSTB_SDHCI_INDEX); + + if (!sdhci_base_address) { + sdhci_base_address = BCMSTB_SDHCI_BASE; + printf("%s: Assuming BCMSTB SDHCI address: 0x%p\n", + __func__, (void *)sdhci_base_address); + } + + debug("BCMSTB SDHCI base address: 0x%p\n", (void *)sdhci_base_address); + + bcmstb_sdhci_init(sdhci_base_address); + + return 0; +} + +int timer_init(void) +{ + gd->arch.timer_rate_hz = readl(BCMSTB_TIMER_FREQUENCY); + + return 0; +} + +ulong get_tbclk(void) +{ + return gd->arch.timer_rate_hz; +} + +uint64_t get_ticks(void) +{ + gd->timebase_h = readl(BCMSTB_TIMER_HIGH); + gd->timebase_l = readl(BCMSTB_TIMER_LOW); + + return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l; +} + +int board_late_init(void) +{ + debug("Arguments from prior stage bootloader:\n"); + debug("General Purpose Register 0: 0x%x\n", bcmstb_boot_parameters.r0); + debug("General Purpose Register 1: 0x%x\n", bcmstb_boot_parameters.r1); + debug("General Purpose Register 2: 0x%x\n", bcmstb_boot_parameters.r2); + debug("General Purpose Register 3: 0x%x\n", bcmstb_boot_parameters.r3); + debug("Stack Pointer Register: 0x%x\n", bcmstb_boot_parameters.sp); + debug("Link Register: 0x%x\n", bcmstb_boot_parameters.lr); + debug("Assuming timer frequency register at: 0x%p\n", + (void *)BCMSTB_TIMER_FREQUENCY); + debug("Read timer frequency (in Hz): %ld\n", gd->arch.timer_rate_hz); + debug("Prior stage provided DTB at: 0x%p\n", + (void *)prior_stage_fdt_address); + + /* + * Set fdtcontroladdr in the environment so that scripts can + * refer to it, for example, to reuse it for fdtaddr. + */ + env_set_hex("fdtcontroladdr", prior_stage_fdt_address); + + /* + * Do not set machid to the machine identifier value provided + * by the prior stage bootloader (bcmstb_boot_parameters.r1) + * because we're using a device tree to boot Linux. + */ + + return 0; +} |