We used to use the ROM API for USB loading only, now with i.MX93 we
fully rely on the ROM API also with SD/eMMC and other boot sources.
The ROM provides us information about the boot source. There are
generally two types of boot sources: seekable for storage devices
like SD/eMMC and streamable for USB. the load_image call must be
handled slightly different for both types of boot sources, so
we fist detect which type we have and call the right load_image
function accordingly.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/arm/mach-imx/romapi.c | 156 ++++++++++++++++++++++++++++++++++++-
include/mach/imx/romapi.h | 1 +
2 files changed, 153 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-imx/romapi.c b/arch/arm/mach-imx/romapi.c
index 29c2d4005c..1b1800f1e0 100644
--- a/arch/arm/mach-imx/romapi.c
+++ b/arch/arm/mach-imx/romapi.c
@@ -3,6 +3,8 @@
#define pr_fmt(fmt) "romapi: " fmt
#include <common.h>
+#include <linux/bitfield.h>
+#include <soc/imx9/flash_header.h>
#include <asm/sections.h>
#include <mach/imx/romapi.h>
#include <mach/imx/atf.h>
@@ -14,7 +16,39 @@
#include <init.h>
#include <pbl.h>
-static int imx_romapi_load(struct rom_api *rom_api, void *adr, size_t size)
+#define BOOTROM_INFO_VERSION 0x1
+#define BOOTROM_INFO_BOOT_DEVICE 0x2
+#define BOOTROM_INFO_DEVICE_PAGE_SIZE 0x3
+#define BOOTROM_INFO_OFFSET_IVT 0x4
+#define BOOTROM_INFO_BOOT_STAGE 0x5
+#define BOOTROM_INFO_OFFSET_IMAGE 0x6
+
+#define BOOTROM_BOOT_DEVICE_INTERFACE GENMASK(23, 16)
+#define BOOTROM_BOOT_DEVICE_SD 0x1
+#define BOOTROM_BOOT_DEVICE_EMMC 0x2
+#define BOOTROM_BOOT_DEVICE_FLEXSPI_NOR 0x4
+#define BOOTROM_BOOT_DEVICE_LPSPI 0x6
+#define BOOTROM_BOOT_DEVICE_FLEXSPI_NAND 0x8
+#define BOOTROM_BOOT_DEVICE_USB 0xe
+#define BOOTROM_BOOT_DEVICE_INSTANCE GENMASK(15, 8)
+#define BOOTROM_BOOT_DEVICE_STATE GENMASK(7, 0)
+
+static int imx_bootrom_query(struct rom_api *rom_api, uint32_t type, uint32_t *__info)
+{
+ static uint32_t info;
+ uint32_t xor = type ^ (uintptr_t)&info;
+ int ret;
+
+ ret = rom_api->query_boot_infor(type, &info, xor);
+ if (ret != ROM_API_OKAY)
+ return -EIO;
+
+ *__info = info;
+
+ return 0;
+}
+
+static int imx_romapi_load_stream(struct rom_api *rom_api, void *adr, size_t size)
{
while (size) {
size_t chunksize = min(size, (size_t)1024);
@@ -30,6 +64,22 @@ static int imx_romapi_load(struct rom_api *rom_api, void *adr, size_t size)
adr += chunksize;
size -= chunksize;
}
+ return 0;
+}
+
+static int imx_romapi_load_seekable(struct rom_api *rom_api, void *adr, uint32_t offset,
+ size_t size)
+{
+ int ret;
+
+ size = PAGE_ALIGN(size);
+
+ ret = rom_api->download_image(adr, offset, size,
+ (uintptr_t)adr ^ offset ^ size);
+ if (ret != ROM_API_OKAY) {
+ pr_err("Failed to load piggy data (ret = %x)\n", ret);
+ return -EIO;
+ }
return 0;
}
@@ -37,9 +87,9 @@ static int imx_romapi_load(struct rom_api *rom_api, void *adr, size_t size)
/* read piggydata via a bootrom callback and place it behind our copy in SDRAM */
static int imx_romapi_load_image(struct rom_api *rom_api)
{
- return imx_romapi_load(rom_api,
- (void *)MX8M_ATF_BL33_BASE_ADDR + barebox_pbl_size,
- __image_end - __piggydata_start);
+ return imx_romapi_load_stream(rom_api,
+ (void *)MX8M_ATF_BL33_BASE_ADDR,
+ __image_end - __piggydata_start);
}
int imx8mp_romapi_load_image(void)
@@ -56,6 +106,104 @@ int imx8mn_romapi_load_image(void)
return imx8mp_romapi_load_image();
}
+static int imx_romapi_boot_device_seekable(struct rom_api *rom_api)
+{
+ uint32_t boot_device, boot_device_type, boot_device_state;
+ int ret;
+ bool seekable;
+
+ ret = imx_bootrom_query(rom_api, BOOTROM_INFO_BOOT_DEVICE, &boot_device);
+ if (ret)
+ return ret;
+
+ boot_device_type = FIELD_GET(BOOTROM_BOOT_DEVICE_INTERFACE, boot_device);
+
+ switch (boot_device_type) {
+ case BOOTROM_BOOT_DEVICE_SD:
+ case BOOTROM_BOOT_DEVICE_FLEXSPI_NOR:
+ case BOOTROM_BOOT_DEVICE_LPSPI:
+ case BOOTROM_BOOT_DEVICE_FLEXSPI_NAND:
+ seekable = true;
+ break;
+ case BOOTROM_BOOT_DEVICE_USB:
+ seekable = false;
+ break;
+ case BOOTROM_BOOT_DEVICE_EMMC:
+ boot_device_state = FIELD_GET(BOOTROM_BOOT_DEVICE_STATE, boot_device);
+ if (boot_device_state & BIT(0))
+ seekable = false;
+ else
+ seekable = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return seekable;
+}
+
+int imx93_romapi_load_image(void)
+{
+ struct rom_api *rom_api = (void *)0x1980;
+ int ret;
+ int seekable;
+ uint32_t offset, image_offset;
+ void *bl33 = (void *)MX93_ATF_BL33_BASE_ADDR;
+ struct flash_header_v3 *fh;
+
+ OPTIMIZER_HIDE_VAR(rom_api);
+
+ seekable = imx_romapi_boot_device_seekable(rom_api);
+ if (seekable < 0)
+ return seekable;
+
+ if (!seekable) {
+ int align_size = ALIGN(barebox_pbl_size, 1024) - barebox_pbl_size;
+ void *pbl_size_aligned = bl33 + ALIGN(barebox_pbl_size, 1024);
+
+ /*
+ * The USB protocol uploads in chunks of 1024 bytes. This means
+ * the initial piggy data up to the next 1KiB boundary is already
+ * transferred. Align up the start address to this boundary.
+ */
+
+ return imx_romapi_load_stream(rom_api,
+ pbl_size_aligned,
+ __image_end - __piggydata_start - align_size);
+ }
+
+ ret = imx_bootrom_query(rom_api, BOOTROM_INFO_OFFSET_IMAGE, &offset);
+ if (ret)
+ return ret;
+
+ pr_debug("%s: IVT offset on boot device: 0x%08x\n", __func__, offset);
+
+ ret = imx_romapi_load_seekable(rom_api, bl33, offset, 4096);
+ if (ret)
+ return ret;
+
+ fh = bl33;
+
+ if (fh->tag != 0x87) {
+ pr_err("Invalid IVT header: 0x%02x, expected 0x87\n", fh->tag);
+ return -EINVAL;
+ }
+
+ image_offset = fh->img[0].offset;
+
+ pr_debug("%s: offset in image: 0x%08x\n", __func__, image_offset);
+
+ /*
+ * We assume the first image in the first container is the barebox image,
+ * which is what the imx9image call in images/Makefile.imx generates.
+ */
+ ret = imx_romapi_load_seekable(rom_api, bl33, offset + image_offset, barebox_image_size);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
const u32 *imx8m_get_bootrom_log(void)
{
if (current_el() == 3) {
diff --git a/include/mach/imx/romapi.h b/include/mach/imx/romapi.h
index 8ea7fbfb04..959d165a33 100644
--- a/include/mach/imx/romapi.h
+++ b/include/mach/imx/romapi.h
@@ -37,6 +37,7 @@ enum boot_dev_type_e {
int imx8mp_romapi_load_image(void);
int imx8mn_romapi_load_image(void);
+int imx93_romapi_load_image(void);
/* only call after DRAM has been configured */
void imx8m_save_bootrom_log(void *dst);
--
2.39.2
