arch/arm/mach-k3/sysfw-loader.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * K3: System Firmware Loader
   4  *
   5  * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
   6  *      Andreas Dannenberg <dannenberg@ti.com>
   7  */
   8
   9 #include <common.h>
  10 #include <spl.h>
  11 #include <malloc.h>
  12 #include <remoteproc.h>
  13 #include <linux/soc/ti/ti_sci_protocol.h>
  14 #include <g_dnl.h>
  15 #include <usb.h>
  16 #include <dfu.h>
  17 #include <dm/uclass-internal.h>
  18 #include <spi_flash.h>
  19
  20 #include <asm/arch/sys_proto.h>
  21 #include "common.h"
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 /* Name of the FIT image nodes for SYSFW and its config data */
  26 #define SYSFW_FIRMWARE                  "sysfw.bin"
  27 #define SYSFW_CFG_BOARD                 "board-cfg.bin"
  28 #define SYSFW_CFG_PM                    "pm-cfg.bin"
  29 #define SYSFW_CFG_RM                    "rm-cfg.bin"
  30 #define SYSFW_CFG_SEC                   "sec-cfg.bin"
  31
  32 static bool sysfw_loaded;
  33 static void *sysfw_load_address;
  34
  35 /*
  36  * Populate SPL hook to override the default load address used by the SPL
  37  * loader function with a custom address for SYSFW loading.
  38  */
  39 struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
  40 {
  41         if (sysfw_loaded)
  42                 return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
  43         else if (sysfw_load_address)
  44                 return sysfw_load_address;
  45         else
  46                 panic("SYSFW load address not defined!");
  47 }
  48
  49 /*
  50  * Populate SPL hook to skip the default SPL loader FIT post-processing steps
  51  * during SYSFW loading and return to the calling function so we can perform
  52  * our own custom processing.
  53  */
  54 bool spl_load_simple_fit_skip_processing(void)
  55 {
  56         return !sysfw_loaded;
  57 }
  58
  59 static int fit_get_data_by_name(const void *fit, int images, const char *name,
  60                                 const void **addr, size_t *size)
  61 {
  62         int node_offset;
  63
  64         node_offset = fdt_subnode_offset(fit, images, name);
  65         if (node_offset < 0)
  66                 return -ENOENT;
  67
  68         return fit_image_get_data(fit, node_offset, addr, size);
  69 }
  70
  71 static void k3_sysfw_load_using_fit(void *fit)
  72 {
  73         int images;
  74         const void *sysfw_addr;
  75         size_t sysfw_size;
  76         int ret;
  77
  78         /* Find the node holding the images information */
  79         images = fdt_path_offset(fit, FIT_IMAGES_PATH);
  80         if (images < 0)
  81                 panic("Cannot find /images node (%d)\n", images);
  82
  83         /* Extract System Firmware (SYSFW) image from FIT */
  84         ret = fit_get_data_by_name(fit, images, SYSFW_FIRMWARE,
  85                                    &sysfw_addr, &sysfw_size);
  86         if (ret < 0)
  87                 panic("Error accessing %s node in FIT (%d)\n", SYSFW_FIRMWARE,
  88                       ret);
  89
  90         /*
  91          * Start up system controller firmware
  92          *
  93          * It is assumed that remoteproc device 0 is the corresponding
  94          * system-controller that runs SYSFW. Make sure DT reflects the same.
  95          */
  96         ret = rproc_dev_init(0);
  97         if (ret)
  98                 panic("rproc failed to be initialized (%d)\n", ret);
  99
 100         ret = rproc_load(0, (ulong)sysfw_addr, (ulong)sysfw_size);
 101         if (ret)
 102                 panic("Firmware failed to start on rproc (%d)\n", ret);
 103
 104         ret = rproc_start(0);
 105         if (ret)
 106                 panic("Firmware init failed on rproc (%d)\n", ret);
 107 }
 108
 109 static void k3_sysfw_configure_using_fit(void *fit,
 110                                          struct ti_sci_handle *ti_sci)
 111 {
 112         struct ti_sci_board_ops *board_ops = &ti_sci->ops.board_ops;
 113         int images;
 114         const void *cfg_fragment_addr;
 115         size_t cfg_fragment_size;
 116         int ret;
 117
 118         /* Find the node holding the images information */
 119         images = fdt_path_offset(fit, FIT_IMAGES_PATH);
 120         if (images < 0)
 121                 panic("Cannot find /images node (%d)\n", images);
 122
 123         /* Extract board configuration from FIT */
 124         ret = fit_get_data_by_name(fit, images, SYSFW_CFG_BOARD,
 125                                    &cfg_fragment_addr, &cfg_fragment_size);
 126         if (ret < 0)
 127                 panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_BOARD,
 128                       ret);
 129
 130         /* Apply board configuration to SYSFW */
 131         ret = board_ops->board_config(ti_sci,
 132                                       (u64)(u32)cfg_fragment_addr,
 133                                       (u32)cfg_fragment_size);
 134         if (ret)
 135                 panic("Failed to set board configuration (%d)\n", ret);
 136
 137         /* Extract power/clock (PM) specific configuration from FIT */
 138         ret = fit_get_data_by_name(fit, images, SYSFW_CFG_PM,
 139                                    &cfg_fragment_addr, &cfg_fragment_size);
 140         if (ret < 0)
 141                 panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_PM,
 142                       ret);
 143
 144         /* Apply power/clock (PM) specific configuration to SYSFW */
 145         ret = board_ops->board_config_pm(ti_sci,
 146                                          (u64)(u32)cfg_fragment_addr,
 147                                          (u32)cfg_fragment_size);
 148         if (ret)
 149                 panic("Failed to set board PM configuration (%d)\n", ret);
 150
 151         /* Extract resource management (RM) specific configuration from FIT */
 152         ret = fit_get_data_by_name(fit, images, SYSFW_CFG_RM,
 153                                    &cfg_fragment_addr, &cfg_fragment_size);
 154         if (ret < 0)
 155                 panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_RM,
 156                       ret);
 157
 158         /* Apply resource management (RM) configuration to SYSFW */
 159         ret = board_ops->board_config_rm(ti_sci,
 160                                          (u64)(u32)cfg_fragment_addr,
 161                                          (u32)cfg_fragment_size);
 162         if (ret)
 163                 panic("Failed to set board RM configuration (%d)\n", ret);
 164
 165         /* Extract security specific configuration from FIT */
 166         ret = fit_get_data_by_name(fit, images, SYSFW_CFG_SEC,
 167                                    &cfg_fragment_addr, &cfg_fragment_size);
 168         if (ret < 0)
 169                 panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_SEC,
 170                       ret);
 171
 172         /* Apply security configuration to SYSFW */
 173         ret = board_ops->board_config_security(ti_sci,
 174                                                (u64)(u32)cfg_fragment_addr,
 175                                                (u32)cfg_fragment_size);
 176         if (ret)
 177                 panic("Failed to set board security configuration (%d)\n",
 178                       ret);
 179 }
 180
 181 #if CONFIG_IS_ENABLED(DFU)
 182 static int k3_sysfw_dfu_download(void *addr)
 183 {
 184         char dfu_str[50];
 185         int ret;
 186
 187         sprintf(dfu_str, "sysfw.itb ram 0x%p 0x%x", addr,
 188                 CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
 189         ret = dfu_config_entities(dfu_str, "ram", "0");
 190         if (ret) {
 191                 dfu_free_entities();
 192                 goto exit;
 193         }
 194
 195         run_usb_dnl_gadget(0, "usb_dnl_dfu");
 196 exit:
 197         dfu_free_entities();
 198         return ret;
 199 }
 200 #endif
 201
 202 #if CONFIG_IS_ENABLED(SPI_LOAD)
 203 static void *k3_sysfw_get_spi_addr(void)
 204 {
 205         struct udevice *dev;
 206         fdt_addr_t addr;
 207         int ret;
 208
 209         ret = uclass_find_device_by_seq(UCLASS_SPI, CONFIG_SF_DEFAULT_BUS,
 210                                         true, &dev);
 211         if (ret)
 212                 return NULL;
 213
 214         addr = dev_read_addr_index(dev, 1);
 215         if (addr == FDT_ADDR_T_NONE)
 216                 return NULL;
 217
 218         return (void *)(addr + CONFIG_K3_SYSFW_IMAGE_SPI_OFFS);
 219 }
 220 #endif
 221
 222 void k3_sysfw_loader(void (*config_pm_pre_callback) (void),
 223                      void (*config_pm_done_callback)(void))
 224 {
 225         struct spl_image_info spl_image = { 0 };
 226         struct spl_boot_device bootdev = { 0 };
 227         struct ti_sci_handle *ti_sci;
 228         int ret = 0;
 229
 230         /* Reserve a block of aligned memory for loading the SYSFW image */
 231         sysfw_load_address = memalign(ARCH_DMA_MINALIGN,
 232                                       CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
 233         if (!sysfw_load_address)
 234                 panic("Error allocating %u bytes of memory for SYSFW image\n",
 235                       CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
 236
 237         debug("%s: allocated %u bytes at 0x%p\n", __func__,
 238               CONFIG_K3_SYSFW_IMAGE_SIZE_MAX, sysfw_load_address);
 239
 240         /* Set load address for legacy modes that bypass spl_get_load_buffer */
 241         spl_image.load_addr = (uintptr_t)sysfw_load_address;
 242
 243         bootdev.boot_device = spl_boot_device();
 244
 245         /* Load combined System Controller firmware and config data image */
 246         switch (bootdev.boot_device) {
 247 #if CONFIG_IS_ENABLED(MMC_SUPPORT)
 248         case BOOT_DEVICE_MMC1:
 249         case BOOT_DEVICE_MMC2:
 250         case BOOT_DEVICE_MMC2_2:
 251                 ret = spl_mmc_load(&spl_image, &bootdev,
 252 #ifdef CONFIG_K3_SYSFW_IMAGE_NAME
 253                                    CONFIG_K3_SYSFW_IMAGE_NAME,
 254 #else
 255                                    NULL,
 256 #endif
 257 #ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART
 258                                    CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART,
 259 #else
 260                                    0,
 261 #endif
 262 #ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT
 263                                    CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT);
 264 #else
 265                                    0);
 266 #endif
 267                 break;
 268 #endif
 269 #if CONFIG_IS_ENABLED(SPI_LOAD)
 270         case BOOT_DEVICE_SPI:
 271                 sysfw_load_address = k3_sysfw_get_spi_addr();
 272                 if (!sysfw_load_address)
 273                         ret = -ENODEV;
 274                 break;
 275 #endif
 276 #if CONFIG_IS_ENABLED(YMODEM_SUPPORT)
 277         case BOOT_DEVICE_UART:
 278 #ifdef CONFIG_K3_EARLY_CONS
 279                 /*
 280                  * Establish a serial console if not yet available as required
 281                  * for UART-based boot. For this use the early console feature
 282                  * that allows setting up a UART for use before SYSFW has been
 283                  * brought up. Note that the associated UART module's clocks
 284                  * must have gotten enabled by the ROM bootcode which will be
 285                  * the case when continuing to boot serially from the same
 286                  * UART that the ROM loaded the initial bootloader from.
 287                  */
 288                 if (!gd->have_console)
 289                         early_console_init();
 290 #endif
 291                 ret = spl_ymodem_load_image(&spl_image, &bootdev);
 292                 break;
 293 #endif
 294 #if CONFIG_IS_ENABLED(DFU)
 295         case BOOT_DEVICE_DFU:
 296                 ret = k3_sysfw_dfu_download(sysfw_load_address);
 297                 break;
 298 #endif
 299         default:
 300                 panic("Loading SYSFW image from device %u not supported!\n",
 301                       bootdev.boot_device);
 302         }
 303
 304         if (ret)
 305                 panic("Error %d occurred during loading SYSFW image!\n", ret);
 306
 307         /*
 308          * Now that SYSFW got loaded set helper flag to restore regular SPL
 309          * loader behavior so we can later boot into the next stage as expected.
 310          */
 311         sysfw_loaded = true;
 312
 313         /* Ensure the SYSFW image is in FIT format */
 314         if (image_get_magic((const image_header_t *)sysfw_load_address) !=
 315             FDT_MAGIC)
 316                 panic("SYSFW image not in FIT format!\n");
 317
 318         /* Extract and start SYSFW */
 319         k3_sysfw_load_using_fit(sysfw_load_address);
 320
 321         /* Get handle for accessing SYSFW services */
 322         ti_sci = get_ti_sci_handle();
 323
 324         if (config_pm_pre_callback)
 325                 config_pm_pre_callback();
 326
 327         /* Parse and apply the different SYSFW configuration fragments */
 328         k3_sysfw_configure_using_fit(sysfw_load_address, ti_sci);
 329
 330         /*
 331          * Now that all clocks and PM aspects are setup, invoke a user-
 332          * provided callback function. Usually this callback would be used
 333          * to setup or re-configure the U-Boot console UART.
 334          */
 335         if (config_pm_done_callback)
 336                 config_pm_done_callback();
 337 }