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https://github.com/brain-hackers/u-boot-brain
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921b325854
In order to allow booting TI K3 family SoCs via Y-Modem add support for loading System Firmware by tapping into the associated SPL core loader function. In this context also make sure a console is available and if not go ahead and activate the early console feature which allows bringing up an alternate full console before the main console is activated. Such an alternate console is typically setup in a way that the associated UART can be fully initialized prior to SYSFW services being available. Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
293 lines
8.8 KiB
C
293 lines
8.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* K3: System Firmware Loader
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*
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* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
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* Andreas Dannenberg <dannenberg@ti.com>
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*/
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#include <common.h>
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#include <spl.h>
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#include <malloc.h>
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#include <remoteproc.h>
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#include <linux/soc/ti/ti_sci_protocol.h>
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#include <asm/arch/sys_proto.h>
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#include "common.h"
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DECLARE_GLOBAL_DATA_PTR;
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/* Name of the FIT image nodes for SYSFW and its config data */
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#define SYSFW_FIRMWARE "sysfw.bin"
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#define SYSFW_CFG_BOARD "board-cfg.bin"
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#define SYSFW_CFG_PM "pm-cfg.bin"
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#define SYSFW_CFG_RM "rm-cfg.bin"
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#define SYSFW_CFG_SEC "sec-cfg.bin"
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static bool sysfw_loaded;
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static void *sysfw_load_address;
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/*
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* Populate SPL hook to override the default load address used by the SPL
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* loader function with a custom address for SYSFW loading.
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*/
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struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
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{
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if (sysfw_loaded)
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return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
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else if (sysfw_load_address)
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return sysfw_load_address;
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else
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panic("SYSFW load address not defined!");
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}
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/*
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* Populate SPL hook to skip the default SPL loader FIT post-processing steps
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* during SYSFW loading and return to the calling function so we can perform
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* our own custom processing.
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*/
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bool spl_load_simple_fit_skip_processing(void)
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{
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return !sysfw_loaded;
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}
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static int fit_get_data_by_name(const void *fit, int images, const char *name,
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const void **addr, size_t *size)
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{
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int node_offset;
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node_offset = fdt_subnode_offset(fit, images, name);
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if (node_offset < 0)
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return -ENOENT;
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return fit_image_get_data(fit, node_offset, addr, size);
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}
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static void k3_sysfw_load_using_fit(void *fit)
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{
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int images;
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const void *sysfw_addr;
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size_t sysfw_size;
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int ret;
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/* Find the node holding the images information */
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images = fdt_path_offset(fit, FIT_IMAGES_PATH);
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if (images < 0)
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panic("Cannot find /images node (%d)\n", images);
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/* Extract System Firmware (SYSFW) image from FIT */
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ret = fit_get_data_by_name(fit, images, SYSFW_FIRMWARE,
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&sysfw_addr, &sysfw_size);
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if (ret < 0)
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panic("Error accessing %s node in FIT (%d)\n", SYSFW_FIRMWARE,
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ret);
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/*
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* Start up system controller firmware
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*
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* It is assumed that remoteproc device 0 is the corresponding
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* system-controller that runs SYSFW. Make sure DT reflects the same.
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*/
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ret = rproc_dev_init(0);
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if (ret)
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panic("rproc failed to be initialized (%d)\n", ret);
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ret = rproc_load(0, (ulong)sysfw_addr, (ulong)sysfw_size);
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if (ret)
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panic("Firmware failed to start on rproc (%d)\n", ret);
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ret = rproc_start(0);
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if (ret)
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panic("Firmware init failed on rproc (%d)\n", ret);
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}
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static void k3_sysfw_configure_using_fit(void *fit,
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struct ti_sci_handle *ti_sci)
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{
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struct ti_sci_board_ops *board_ops = &ti_sci->ops.board_ops;
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int images;
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const void *cfg_fragment_addr;
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size_t cfg_fragment_size;
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int ret;
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/* Find the node holding the images information */
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images = fdt_path_offset(fit, FIT_IMAGES_PATH);
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if (images < 0)
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panic("Cannot find /images node (%d)\n", images);
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/* Extract board configuration from FIT */
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ret = fit_get_data_by_name(fit, images, SYSFW_CFG_BOARD,
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&cfg_fragment_addr, &cfg_fragment_size);
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if (ret < 0)
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panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_BOARD,
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ret);
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/* Apply board configuration to SYSFW */
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ret = board_ops->board_config(ti_sci,
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(u64)(u32)cfg_fragment_addr,
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(u32)cfg_fragment_size);
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if (ret)
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panic("Failed to set board configuration (%d)\n", ret);
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/* Extract power/clock (PM) specific configuration from FIT */
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ret = fit_get_data_by_name(fit, images, SYSFW_CFG_PM,
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&cfg_fragment_addr, &cfg_fragment_size);
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if (ret < 0)
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panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_PM,
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ret);
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/* Apply power/clock (PM) specific configuration to SYSFW */
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ret = board_ops->board_config_pm(ti_sci,
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(u64)(u32)cfg_fragment_addr,
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(u32)cfg_fragment_size);
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if (ret)
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panic("Failed to set board PM configuration (%d)\n", ret);
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/* Extract resource management (RM) specific configuration from FIT */
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ret = fit_get_data_by_name(fit, images, SYSFW_CFG_RM,
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&cfg_fragment_addr, &cfg_fragment_size);
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if (ret < 0)
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panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_RM,
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ret);
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/* Apply resource management (RM) configuration to SYSFW */
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ret = board_ops->board_config_rm(ti_sci,
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(u64)(u32)cfg_fragment_addr,
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(u32)cfg_fragment_size);
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if (ret)
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panic("Failed to set board RM configuration (%d)\n", ret);
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/* Extract security specific configuration from FIT */
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ret = fit_get_data_by_name(fit, images, SYSFW_CFG_SEC,
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&cfg_fragment_addr, &cfg_fragment_size);
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if (ret < 0)
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panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_SEC,
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ret);
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/* Apply security configuration to SYSFW */
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ret = board_ops->board_config_security(ti_sci,
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(u64)(u32)cfg_fragment_addr,
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(u32)cfg_fragment_size);
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if (ret)
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panic("Failed to set board security configuration (%d)\n",
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ret);
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}
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void k3_sysfw_loader(void (*config_pm_done_callback)(void))
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{
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struct spl_image_info spl_image = { 0 };
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struct spl_boot_device bootdev = { 0 };
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struct ti_sci_handle *ti_sci;
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int ret;
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/* Reserve a block of aligned memory for loading the SYSFW image */
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sysfw_load_address = memalign(ARCH_DMA_MINALIGN,
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CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
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if (!sysfw_load_address)
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panic("Error allocating %u bytes of memory for SYSFW image\n",
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CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
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debug("%s: allocated %u bytes at 0x%p\n", __func__,
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CONFIG_K3_SYSFW_IMAGE_SIZE_MAX, sysfw_load_address);
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/* Set load address for legacy modes that bypass spl_get_load_buffer */
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spl_image.load_addr = (uintptr_t)sysfw_load_address;
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bootdev.boot_device = spl_boot_device();
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/* Load combined System Controller firmware and config data image */
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switch (bootdev.boot_device) {
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#if CONFIG_IS_ENABLED(MMC_SUPPORT)
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case BOOT_DEVICE_MMC1:
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case BOOT_DEVICE_MMC2:
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case BOOT_DEVICE_MMC2_2:
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ret = spl_mmc_load(&spl_image, &bootdev,
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#ifdef CONFIG_K3_SYSFW_IMAGE_NAME
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CONFIG_K3_SYSFW_IMAGE_NAME,
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#else
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NULL,
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#endif
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#ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART
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CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART,
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#else
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0,
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#endif
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#ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT
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CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT);
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#else
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0);
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#endif
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break;
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#endif
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#if CONFIG_IS_ENABLED(YMODEM_SUPPORT)
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case BOOT_DEVICE_UART:
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#ifdef CONFIG_K3_EARLY_CONS
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/*
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* Establish a serial console if not yet available as required
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* for UART-based boot. For this use the early console feature
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* that allows setting up a UART for use before SYSFW has been
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* brought up. Note that the associated UART module's clocks
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* must have gotten enabled by the ROM bootcode which will be
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* the case when continuing to boot serially from the same
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* UART that the ROM loaded the initial bootloader from.
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*/
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if (!gd->have_console)
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early_console_init();
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#endif
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ret = spl_ymodem_load_image(&spl_image, &bootdev);
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break;
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#endif
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default:
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panic("Loading SYSFW image from device %u not supported!\n",
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bootdev.boot_device);
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}
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if (ret)
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panic("Error %d occurred during loading SYSFW image!\n", ret);
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/*
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* Now that SYSFW got loaded set helper flag to restore regular SPL
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* loader behavior so we can later boot into the next stage as expected.
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*/
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sysfw_loaded = true;
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/* Ensure the SYSFW image is in FIT format */
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if (image_get_magic((const image_header_t *)sysfw_load_address) !=
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FDT_MAGIC)
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panic("SYSFW image not in FIT format!\n");
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/* Extract and start SYSFW */
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k3_sysfw_load_using_fit(sysfw_load_address);
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/* Get handle for accessing SYSFW services */
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ti_sci = get_ti_sci_handle();
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/* Parse and apply the different SYSFW configuration fragments */
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k3_sysfw_configure_using_fit(sysfw_load_address, ti_sci);
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/*
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* Now that all clocks and PM aspects are setup, invoke a user-
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* provided callback function. Usually this callback would be used
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* to setup or re-configure the U-Boot console UART.
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*/
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if (config_pm_done_callback)
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config_pm_done_callback();
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/*
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* Output System Firmware version info. Note that since the
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* 'firmware_description' field is not guaranteed to be zero-
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* terminated we manually add a \0 terminator if needed. Further
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* note that we intentionally no longer rely on the extended
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* printf() formatter '%.*s' to not having to require a more
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* full-featured printf() implementation.
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*/
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char fw_desc[sizeof(ti_sci->version.firmware_description) + 1];
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strncpy(fw_desc, ti_sci->version.firmware_description,
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sizeof(ti_sci->version.firmware_description));
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fw_desc[sizeof(fw_desc) - 1] = '\0';
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printf("SYSFW ABI: %d.%d (firmware rev 0x%04x '%s')\n",
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ti_sci->version.abi_major, ti_sci->version.abi_minor,
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ti_sci->version.firmware_revision, fw_desc);
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}
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