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