arch/x86/cpu/apollolake/spl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright 2019 Google LLC
   4  */
   5
   6 #include <common.h>
   7 #include <binman_sym.h>
   8 #include <dm.h>
   9 #include <malloc.h>
  10 #include <spi.h>
  11 #include <spl.h>
  12 #include <spi_flash.h>
  13 #include <asm/fast_spi.h>
  14 #include <asm/spl.h>
  15 #include <asm/arch/cpu.h>
  16 #include <asm/arch/iomap.h>
  17 #include <dm/device-internal.h>
  18 #include <dm/uclass-internal.h>
  19
  20 /* This reads the next phase from mapped SPI flash */
  21 static int rom_load_image(struct spl_image_info *spl_image,
  22                           struct spl_boot_device *bootdev)
  23 {
  24         ulong spl_pos = spl_get_image_pos();
  25         ulong spl_size = spl_get_image_size();
  26         struct udevice *dev;
  27         ulong map_base;
  28         size_t map_size;
  29         uint offset;
  30         int ret;
  31
  32         spl_image->size = CONFIG_SYS_MONITOR_LEN;  /* We don't know SPL size */
  33         spl_image->entry_point = spl_phase() == PHASE_TPL ?
  34                 CONFIG_SPL_TEXT_BASE : CONFIG_SYS_TEXT_BASE;
  35         spl_image->load_addr = spl_image->entry_point;
  36         spl_image->os = IH_OS_U_BOOT;
  37         spl_image->name = "U-Boot";
  38         debug("Reading from mapped SPI %lx, size %lx", spl_pos, spl_size);
  39
  40         if (CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT)) {
  41                 ret = uclass_find_first_device(UCLASS_SPI_FLASH, &dev);
  42                 if (ret)
  43                         return log_msg_ret("spi_flash", ret);
  44                 if (!dev)
  45                         return log_msg_ret("spi_flash dev", -ENODEV);
  46                 ret = dm_spi_get_mmap(dev, &map_base, &map_size, &offset);
  47                 if (ret)
  48                         return log_msg_ret("mmap", ret);
  49         } else {
  50                 ret = fast_spi_get_bios_mmap(PCH_DEV_SPI, &map_base, &map_size,
  51                                              &offset);
  52                 if (ret)
  53                         return ret;
  54         }
  55         spl_pos += map_base & ~0xff000000;
  56         debug(", base %lx, pos %lx\n", map_base, spl_pos);
  57         bootstage_start(BOOTSTAGE_ID_ACCUM_MMAP_SPI, "mmap_spi");
  58         memcpy((void *)spl_image->load_addr, (void *)spl_pos, spl_size);
  59         cpu_flush_l1d_to_l2();
  60         bootstage_accum(BOOTSTAGE_ID_ACCUM_MMAP_SPI);
  61
  62         return 0;
  63 }
  64 SPL_LOAD_IMAGE_METHOD("Mapped SPI", 2, BOOT_DEVICE_SPI_MMAP, rom_load_image);
  65
  66 #if CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT)
  67
  68 static int apl_flash_std_read(struct udevice *dev, u32 offset, size_t len,
  69                               void *buf)
  70 {
  71         struct spi_flash *flash = dev_get_uclass_priv(dev);
  72         struct mtd_info *mtd = &flash->mtd;
  73         size_t retlen;
  74
  75         return log_ret(mtd->_read(mtd, offset, len, &retlen, buf));
  76 }
  77
  78 static int apl_flash_probe(struct udevice *dev)
  79 {
  80         return spi_flash_std_probe(dev);
  81 }
  82
  83 /*
  84  * Manually set the parent of the SPI flash to SPI, since dtoc doesn't. We also
  85  * need to allocate the parent_platdata since by the time this function is
  86  * called device_bind() has already gone past that step.
  87  */
  88 static int apl_flash_bind(struct udevice *dev)
  89 {
  90         if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
  91                 struct dm_spi_slave_platdata *plat;
  92                 struct udevice *spi;
  93                 int ret;
  94
  95                 ret = uclass_first_device_err(UCLASS_SPI, &spi);
  96                 if (ret)
  97                         return ret;
  98                 dev->parent = spi;
  99
 100                 plat = calloc(sizeof(*plat), 1);
 101                 if (!plat)
 102                         return -ENOMEM;
 103                 dev->parent_platdata = plat;
 104         }
 105
 106         return 0;
 107 }
 108
 109 static const struct dm_spi_flash_ops apl_flash_ops = {
 110         .read           = apl_flash_std_read,
 111 };
 112
 113 static const struct udevice_id apl_flash_ids[] = {
 114         { .compatible = "jedec,spi-nor" },
 115         { }
 116 };
 117
 118 U_BOOT_DRIVER(winbond_w25q128fw) = {
 119         .name           = "winbond_w25q128fw",
 120         .id             = UCLASS_SPI_FLASH,
 121         .of_match       = apl_flash_ids,
 122         .bind           = apl_flash_bind,
 123         .probe          = apl_flash_probe,
 124         .priv_auto_alloc_size = sizeof(struct spi_flash),
 125         .ops            = &apl_flash_ops,
 126 };
 127
 128 /* This uses a SPI flash device to read the next phase */
 129 static int spl_fast_spi_load_image(struct spl_image_info *spl_image,
 130                                    struct spl_boot_device *bootdev)
 131 {
 132         ulong spl_pos = spl_get_image_pos();
 133         ulong spl_size = spl_get_image_size();
 134         struct udevice *dev;
 135         int ret;
 136
 137         ret = uclass_first_device_err(UCLASS_SPI_FLASH, &dev);
 138         if (ret)
 139                 return ret;
 140
 141         spl_image->size = CONFIG_SYS_MONITOR_LEN;  /* We don't know SPL size */
 142         spl_image->entry_point = spl_phase() == PHASE_TPL ?
 143                 CONFIG_SPL_TEXT_BASE : CONFIG_SYS_TEXT_BASE;
 144         spl_image->load_addr = spl_image->entry_point;
 145         spl_image->os = IH_OS_U_BOOT;
 146         spl_image->name = "U-Boot";
 147         spl_pos &= ~0xff000000;
 148         debug("Reading from flash %lx, size %lx\n", spl_pos, spl_size);
 149         ret = spi_flash_read_dm(dev, spl_pos, spl_size,
 150                                 (void *)spl_image->load_addr);
 151         cpu_flush_l1d_to_l2();
 152         if (ret)
 153                 return ret;
 154
 155         return 0;
 156 }
 157 SPL_LOAD_IMAGE_METHOD("Fast SPI", 1, BOOT_DEVICE_FAST_SPI,
 158                       spl_fast_spi_load_image);
 159
 160 void board_boot_order(u32 *spl_boot_list)
 161 {
 162         bool use_spi_flash = IS_ENABLED(CONFIG_APL_BOOT_FROM_FAST_SPI_FLASH);
 163
 164         if (use_spi_flash) {
 165                 spl_boot_list[0] = BOOT_DEVICE_FAST_SPI;
 166                 spl_boot_list[1] = BOOT_DEVICE_SPI_MMAP;
 167         } else {
 168                 spl_boot_list[0] = BOOT_DEVICE_SPI_MMAP;
 169                 spl_boot_list[1] = BOOT_DEVICE_FAST_SPI;
 170         }
 171 }
 172
 173 #else
 174
 175 void board_boot_order(u32 *spl_boot_list)
 176 {
 177         spl_boot_list[0] = BOOT_DEVICE_SPI_MMAP;
 178 }
 179 #endif