/*
   * (C) Copyright 2011
   * Stefano Babic, DENX Software Engineering, sbabic@denx.de.
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include "imagetool.h"
  #include "aisimage.h"
  #include <image.h>
  
  #define IS_FNC_EXEC(c)	(cmd_table[c].AIS_cmd == AIS_CMD_FNLOAD)
  #define WORD_ALIGN0	4
  #define WORD_ALIGN(len) (((len)+WORD_ALIGN0-1) & ~(WORD_ALIGN0-1))
  #define MAX_CMD_BUFFER	4096
  
  static uint32_t ais_img_size;
  
  /*
   * Supported commands for configuration file
   */
  static table_entry_t aisimage_cmds[] = {
  	{CMD_DATA,		"DATA",		"Reg Write Data"},
  	{CMD_FILL,		"FILL",		"Fill range with pattern"},
  	{CMD_CRCON,		"CRCON",	"CRC Enable"},
  	{CMD_CRCOFF,		"CRCOFF",	"CRC Disable"},
  	{CMD_CRCCHECK,		"CRCCHECK",	"CRC Validate"},
  	{CMD_JMPCLOSE,		"JMPCLOSE",	"Jump & Close"},
  	{CMD_JMP,		"JMP",		"Jump"},
  	{CMD_SEQREAD,		"SEQREAD",	"Sequential read"},
  	{CMD_PLL0,		"PLL0",		"PLL0"},
  	{CMD_PLL1,		"PLL1",		"PLL1"},
  	{CMD_CLK,		"CLK",		"Clock configuration"},
  	{CMD_DDR2,		"DDR2",		"DDR2 Configuration"},
  	{CMD_EMIFA,		"EMIFA",	"EMIFA"},
  	{CMD_EMIFA_ASYNC,	"EMIFA_ASYNC",	"EMIFA Async"},
  	{CMD_PLL,		"PLL",		"PLL & Clock configuration"},
  	{CMD_PSC,		"PSC",		"PSC setup"},
  	{CMD_PINMUX,		"PINMUX",	"Pinmux setup"},
  	{CMD_BOOTTABLE,		"BOOT_TABLE",	"Boot table command"},
  	{-1,			"",		""},
  };
  
  static struct ais_func_exec {
  	uint32_t index;
  	uint32_t argcnt;
  } ais_func_table[] = {
  	[CMD_PLL0] = {0, 2},
  	[CMD_PLL1] = {1, 2},
  	[CMD_CLK] = {2, 1},
  	[CMD_DDR2] = {3, 8},
  	[CMD_EMIFA] = {4, 5},
  	[CMD_EMIFA_ASYNC] = {5, 5},
  	[CMD_PLL] = {6, 3},
  	[CMD_PSC] = {7, 1},
  	[CMD_PINMUX] = {8, 3}
  };
  
  static struct cmd_table_t {
  	uint32_t nargs;
  	uint32_t AIS_cmd;
  } cmd_table[] = {
  	[CMD_FILL]	 =	{	4,	AIS_CMD_FILL},
  	[CMD_CRCON]	=	{	0,	AIS_CMD_ENCRC},
  	[CMD_CRCOFF]	=	{	0,	AIS_CMD_DISCRC},
  	[CMD_CRCCHECK]	=	{	2,	AIS_CMD_ENCRC},
  	[CMD_JMPCLOSE]	=	{	1,	AIS_CMD_JMPCLOSE},
  	[CMD_JMP]	=	{	1,	AIS_CMD_JMP},
  	[CMD_SEQREAD]	=	{	0,	AIS_CMD_SEQREAD},
  	[CMD_PLL0]	=	{	2,	AIS_CMD_FNLOAD},
  	[CMD_PLL1]	=	{	2,	AIS_CMD_FNLOAD},
  	[CMD_CLK]	=	{	1,	AIS_CMD_FNLOAD},
  	[CMD_DDR2]	=	{	8,	AIS_CMD_FNLOAD},
  	[CMD_EMIFA]	=	{	5,	AIS_CMD_FNLOAD},
  	[CMD_EMIFA_ASYNC] =	{	5,	AIS_CMD_FNLOAD},
  	[CMD_PLL]	=	{	3,	AIS_CMD_FNLOAD},
  	[CMD_PSC]	=	{	1,	AIS_CMD_FNLOAD},
  	[CMD_PINMUX]	=	{	3,	AIS_CMD_FNLOAD},
  	[CMD_BOOTTABLE]	=	{	4,	AIS_CMD_BOOTTBL},
  };
  
  static uint32_t get_cfg_value(char *token, char *name,  int linenr)
  {
  	char *endptr;
  	uint32_t value;
  
  	errno = 0;
  	value = strtoul(token, &endptr, 16);
  	if (errno || (token == endptr)) {
  		fprintf(stderr, "Error: %s[%d] - Invalid hex data(%s)
  ",
  			name,  linenr, token);
  		exit(EXIT_FAILURE);
  	}
  	return value;
  }
  
  static int get_ais_table_id(uint32_t *ptr)
  {
  
  	int i;
  	int func_no;
  
  	for (i = 0; i < ARRAY_SIZE(cmd_table); i++) {
  		if (*ptr == cmd_table[i].AIS_cmd) {
  			if (cmd_table[i].AIS_cmd != AIS_CMD_FNLOAD)
  				return i;
  
  			func_no = ((struct ais_cmd_func *)ptr)->func_args
  				& 0xFFFF;
  			if (func_no == ais_func_table[i].index)
  				return i;
  		}
  	}
  
  	return -1;
  }
  
  static void aisimage_print_header(const void *hdr)
  {
  	struct ais_header *ais_hdr = (struct ais_header *)hdr;
  	uint32_t *ptr;
  	struct ais_cmd_load *ais_load;
  	int id;
  
  	if (ais_hdr->magic != AIS_MAGIC_WORD) {
  		fprintf(stderr, "Error: - AIS Magic Number not found
  ");
  		return;
  	}
  	fprintf(stdout, "Image Type:   TI Davinci AIS Boot Image
  ");
  	fprintf(stdout, "AIS magic :   %08x
  ", ais_hdr->magic);
  	ptr = (uint32_t *)&ais_hdr->magic;
  	ptr++;
  
  	while (*ptr != AIS_CMD_JMPCLOSE) {
  		/* Check if we find the image */
  		if (*ptr == AIS_CMD_LOAD) {
  			ais_load = (struct ais_cmd_load *)ptr;
  			fprintf(stdout, "Image at  :   0x%08x size 0x%08x
  ",
  				ais_load->addr,
  				ais_load->size);
  			ptr = ais_load->data + ais_load->size / sizeof(*ptr);
  			continue;
  		}
  
  		id = get_ais_table_id(ptr);
  		if (id < 0) {
  			fprintf(stderr, "Error: -  AIS Image corrupted
  ");
  			return;
  		}
  		fprintf(stdout, "AIS cmd   :   %s
  ",
  			get_table_entry_name(aisimage_cmds, NULL, id));
  		ptr += cmd_table[id].nargs + IS_FNC_EXEC(id) + 1;
  		if (((void *)ptr - hdr) > ais_img_size) {
  			fprintf(stderr,
  				"AIS Image not terminated by JMPCLOSE
  ");
  			return;
  		}
  	}
  }
  
  static uint32_t *ais_insert_cmd_header(uint32_t cmd, uint32_t nargs,
  	uint32_t *parms, struct image_type_params *tparams,
  	uint32_t *ptr)
  {
  	int i;
  
  	*ptr++ = cmd_table[cmd].AIS_cmd;
  	if (IS_FNC_EXEC(cmd))
  		*ptr++ = ((nargs & 0xFFFF) << 16) + ais_func_table[cmd].index;
  
  	/* Copy parameters */
  	for (i = 0; i < nargs; i++)
  		*ptr++ = cpu_to_le32(parms[i]);
  
  	return ptr;
  
  }
  
  static uint32_t *ais_alloc_buffer(struct image_tool_params *params)
  {
  	int dfd;
  	struct stat sbuf;
  	char *datafile = params->datafile;
  	uint32_t *ptr;
  
  	dfd = open(datafile, O_RDONLY|O_BINARY);
  	if (dfd < 0) {
  		fprintf(stderr, "%s: Can't open %s: %s
  ",
  			params->cmdname, datafile, strerror(errno));
  		exit(EXIT_FAILURE);
  	}
  
  	if (fstat(dfd, &sbuf) < 0) {
  		fprintf(stderr, "%s: Can't stat %s: %s
  ",
  			params->cmdname, datafile, strerror(errno));
  		exit(EXIT_FAILURE);
  	}
  
  	/*
  	 * Place for header is allocated. The size is taken from
  	 * the size of the datafile, that the ais_image_generate()
  	 * will copy into the header. Copying the datafile
  	 * is not left to the main program, because after the datafile
  	 * the header must be terminated with the Jump & Close command.
  	 */
  	ais_img_size = WORD_ALIGN(sbuf.st_size) + MAX_CMD_BUFFER;
  	ptr = (uint32_t *)malloc(WORD_ALIGN(sbuf.st_size) + MAX_CMD_BUFFER);
  	if (!ptr) {
  		fprintf(stderr, "%s: malloc return failure: %s
  ",
  			params->cmdname, strerror(errno));
  		exit(EXIT_FAILURE);
  	}
  
  	close(dfd);
  
  	return ptr;
  }
  
  static uint32_t *ais_copy_image(struct image_tool_params *params,
  	uint32_t *aisptr)
  
  {
  	int dfd;
  	struct stat sbuf;
  	char *datafile = params->datafile;
  	void *ptr;
  
  	dfd = open(datafile, O_RDONLY|O_BINARY);
  	if (dfd < 0) {
  		fprintf(stderr, "%s: Can't open %s: %s
  ",
  			params->cmdname, datafile, strerror(errno));
  		exit(EXIT_FAILURE);
  	}
  
  	if (fstat(dfd, &sbuf) < 0) {
  		fprintf(stderr, "%s: Can't stat %s: %s
  ",
  			params->cmdname, datafile, strerror(errno));
  		exit(EXIT_FAILURE);
  	}
  
  	ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, dfd, 0);
  	*aisptr++ = AIS_CMD_LOAD;
  	*aisptr++ = params->ep;
  	*aisptr++ = sbuf.st_size;
  	memcpy((void *)aisptr, ptr, sbuf.st_size);
  	aisptr += WORD_ALIGN(sbuf.st_size) / sizeof(uint32_t);
  
  	(void) munmap((void *)ptr, sbuf.st_size);
  	(void) close(dfd);
  
  	return aisptr;
  
  }
  
  static int aisimage_generate(struct image_tool_params *params,
  	struct image_type_params *tparams)
  {
  	FILE *fd = NULL;
  	char *line = NULL;
  	char *token, *saveptr1, *saveptr2;
  	int lineno = 0;
  	int fld;
  	size_t len;
  	int32_t cmd;
  	uint32_t nargs, cmd_parms[10];
  	uint32_t value, size;
  	char *name = params->imagename;
  	uint32_t *aishdr;
  
  	fd = fopen(name, "r");
  	if (fd == 0) {
  		fprintf(stderr,
  			"Error: %s - Can't open AIS configuration
  ", name);
  		exit(EXIT_FAILURE);
  	}
  
  	/*
  	 * the size of the header is variable and is computed
  	 * scanning the configuration file.
  	 */
  	tparams->header_size = 0;
  
  	/*
  	 * Start allocating a buffer suitable for most command
  	 * The buffer is then reallocated if it is too small
  	 */
  	aishdr = ais_alloc_buffer(params);
  	tparams->hdr = aishdr;
  	*aishdr++ = AIS_MAGIC_WORD;
  
  	/* Very simple parsing, line starting with # are comments
  	 * and are dropped
  	 */
  	while ((getline(&line, &len, fd)) > 0) {
  		lineno++;
  
  		token = strtok_r(line, "\r
  ", &saveptr1);
  		if (token == NULL)
  			continue;
  
  		/* Check inside the single line */
  		line = token;
  		fld = CFG_COMMAND;
  		cmd = CMD_INVALID;
  		nargs = 0;
  		while (token != NULL) {
  			token = strtok_r(line, " \t", &saveptr2);
  			if (token == NULL)
  				break;
  
  			/* Drop all text starting with '#' as comments */
  			if (token[0] == '#')
  				break;
  
  			switch (fld) {
  			case CFG_COMMAND:
  				cmd = get_table_entry_id(aisimage_cmds,
  					"aisimage commands", token);
  				if (cmd < 0) {
  					fprintf(stderr,
  					"Error: %s[%d] - Invalid command"
  					"(%s)
  ", name, lineno, token);
  
  					exit(EXIT_FAILURE);
  				}
  				break;
  			case CFG_VALUE:
  				value = get_cfg_value(token, name, lineno);
  				cmd_parms[nargs++] = value;
  				if (nargs > cmd_table[cmd].nargs) {
  					fprintf(stderr,
  					 "Error: %s[%d] - too much arguments:"
  						"(%s) for command %s
  ", name,
  						lineno, token,
  						aisimage_cmds[cmd].sname);
  					exit(EXIT_FAILURE);
  				}
  				break;
  			}
  			line = NULL;
  			fld = CFG_VALUE;
  		}
  		if (cmd != CMD_INVALID) {
  			/* Now insert the command into the header */
  			aishdr = ais_insert_cmd_header(cmd, nargs, cmd_parms,
  				tparams, aishdr);
  		}
  
  	}
  	fclose(fd);
  
  	aishdr = ais_copy_image(params, aishdr);
  
  	/* Add Jmp & Close */
  	*aishdr++ = AIS_CMD_JMPCLOSE;
  	*aishdr++ = params->ep;
  
  	size = (aishdr - (uint32_t *)tparams->hdr) * sizeof(uint32_t);
  	tparams->header_size = size;
  
  	return 0;
  }
  
  static int aisimage_check_image_types(uint8_t type)
  {
  	if (type == IH_TYPE_AISIMAGE)
  		return EXIT_SUCCESS;
  	else
  		return EXIT_FAILURE;
  }
  
  static int aisimage_verify_header(unsigned char *ptr, int image_size,
  			struct image_tool_params *params)
  {
  	struct ais_header *ais_hdr = (struct ais_header *)ptr;
  
  	if (ais_hdr->magic != AIS_MAGIC_WORD)
  		return -FDT_ERR_BADSTRUCTURE;
  
  	/* Store the total size to remember in print_hdr */
  	ais_img_size = image_size;
  
  	return 0;
  }
  
  static void aisimage_set_header(void *ptr, struct stat *sbuf, int ifd,
  				struct image_tool_params *params)
  {
  }
  
  int aisimage_check_params(struct image_tool_params *params)
  {
  	if (!params)
  		return CFG_INVALID;
  	if (!strlen(params->imagename)) {
  		fprintf(stderr, "Error: %s - Configuration file not specified, "
  			"it is needed for aisimage generation
  ",
  			params->cmdname);
  		return CFG_INVALID;
  	}
  	/*
  	 * Check parameters:
  	 * XIP is not allowed and verify that incompatible
  	 * parameters are not sent at the same time
  	 * For example, if list is required a data image must not be provided
  	 */
  	return	(params->dflag && (params->fflag || params->lflag)) ||
  		(params->fflag && (params->dflag || params->lflag)) ||
  		(params->lflag && (params->dflag || params->fflag)) ||
  		(params->xflag) || !(strlen(params->imagename));
  }
  
  /*
   * aisimage parameters
   */
  U_BOOT_IMAGE_TYPE(
  	aisimage,
  	"TI Davinci AIS Boot Image support",
  	0,
  	NULL,
  	aisimage_check_params,
  	aisimage_verify_header,
  	aisimage_print_header,
  	aisimage_set_header,
  	NULL,
  	aisimage_check_image_types,
  	NULL,
  	aisimage_generate
  );