// SPDX-License-Identifier: GPL-2.0+

  /*
   *
   * Command for encapsulating/decapsulating blob of memory.

   */
  
  #include <common.h>
  #include <command.h>
  #include <environment.h>
  #include <malloc.h>
  #include <asm/byteorder.h>
  #include <linux/compiler.h>

  #if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \

  	defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M)

  #include <fsl_sec.h>
  #include <asm/arch/clock.h>
  #endif

  /**
   * blob_decap() - Decapsulate the data as a blob
   * @key_mod:	- Pointer to key modifier/key
   * @src:	- Address of data to be decapsulated
   * @dst:	- Address of data to be decapsulated
   * @len:	- Size of data to be decapsulated
   *
   * Returns zero on success,and negative on error.
   */
  __weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
  {
  	return 0;
  }
  
  /**
   * blob_encap() - Encapsulate the data as a blob
   * @key_mod:	- Pointer to key modifier/key
   * @src:	- Address of data to be encapsulated
   * @dst:	- Address of data to be encapsulated
   * @len:	- Size of data to be encapsulated
   *
   * Returns zero on success,and negative on error.
   */
  __weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
  {
  	return 0;
  }
  
  /**
   * do_blob() - Handle the "blob" command-line command
   * @cmdtp:	Command data struct pointer
   * @flag:	Command flag
   * @argc:	Command-line argument count
   * @argv:	Array of command-line arguments
   *
   * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
   * on error.
   */
  static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  {

  	ulong key_addr, src_addr, dst_addr, len;

  	uint8_t *km_ptr, *src_ptr, *dst_ptr;
  	int enc, ret = 0;
  
  	if (argc != 6)
  		return CMD_RET_USAGE;
  
  	if (!strncmp(argv[1], "enc", 3))
  		enc = 1;
  	else if (!strncmp(argv[1], "dec", 3))
  		enc = 0;
  	else
  		return CMD_RET_USAGE;
  
  	src_addr = simple_strtoul(argv[2], NULL, 16);
  	dst_addr = simple_strtoul(argv[3], NULL, 16);
  	len = simple_strtoul(argv[4], NULL, 16);
  	key_addr = simple_strtoul(argv[5], NULL, 16);

  	km_ptr = (uint8_t *)(uintptr_t)key_addr;
  	src_ptr = (uint8_t *)(uintptr_t)src_addr;
  	dst_ptr = (uint8_t *)(uintptr_t)dst_addr;

  #if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \

  	defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M)

  
  	hab_caam_clock_enable(1);
  
  	u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR +
  				   FSL_CAAM_ORSR_JRa_OFFSET);
  	if (out_jr_size != FSL_CAAM_MAX_JR_SIZE)
  		sec_init();
  #endif

  	if (enc)
  		ret = blob_encap(km_ptr, src_ptr, dst_ptr, len);
  	else
  		ret = blob_decap(km_ptr, src_ptr, dst_ptr, len);
  
  	return ret;
  }
  
  /***************************************************/
  static char blob_help_text[] =
  	"enc src dst len km - Encapsulate and create blob of data
  "
  	"                          $len bytes long at address $src and
  "
  	"                          store the result at address $dst.
  "

  	"                          $km is the address where the key
  "
  	"                          modifier is stored.
  "
  	"                          The modifier is required for generation
  "
  	"                          /use as key for cryptographic operation.
  "
  	"                          Key modifier should be 16 byte long.
  "

  	"blob dec src dst len km - Decapsulate the  blob of data at address
  "
  	"                          $src and store result of $len byte at
  "
  	"                          addr $dst.
  "

  	"                          $km is the address where the key
  "
  	"                          modifier is stored.
  "
  	"                          The modifier is required for generation
  "
  	"                          /use as key for cryptographic operation.
  "
  	"                          Key modifier should be 16 byte long.
  ";

  
  U_BOOT_CMD(
  	blob, 6, 1, do_blob,
  	"Blob encapsulation/decryption",
  	blob_help_text
  );