/*
<:copyright-BRCM:2020:DUAL/GPL:standard

   Copyright (c) 2020 Broadcom 
   All Rights Reserved

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2, as published by
the Free Software Foundation (the "GPL").

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.


A copy of the GPL is available at http://www.broadcom.com/licenses/GPLv2.php, or by
writing to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

:>
*/

#include <linux/string.h>
#include "linux/ctype.h"
#include "bcmsfp_i2c.h"

#define TABLE_SEL               0x7F
#define Ax_CRC_EN               0x60
#define EE_UPDATE_DIS           0x1
#define DIG_STATUS_MODE_MASK    0b1
#define CHIP_NAME               "GN28L96_A2"

#define STATUS_CONTROL          0x6E
#define BEN_CTRL                0x87
#define SAFE_MODE_STARTUP       0x88
#define DIG_STATUS              0x89
#define I2C_CONTROL_1           0x8A
#define EEPROM_CTRL_1           0x8D
#define PON_CONTROL             0x6F
#define PW1_0                   0x98
#define PWE_7B                  0x7B
#define PWE_7C                  0x7C
#define PWE_7D                  0x7D
#define PWE_7E                  0x7E
#define APC_BIAS_SEED           0x90
#define ERC_MOD_SEED            0xB0
#define TX_CTRL_3               0x8B


/* compiled-in defaults */
extern const u8 A2_Table_80_file[], A2_Table_81_file[], A2_Lower_file[], A0_Lower_file[], A0_Upper_file[];

enum page_desc_indices {
A0_Lower,
A0_Upper,
A2_Lower,
A2_Table_00,
A2_Table_01,
A2_Table_80,
A2_Table_81,
A2_Table_82,
A2_Table_83,
A2_Table_84,
A2_Table_85,
A2_Table_86,
A2_Table_FF,
};

struct page_desc {
    enum page_desc_indices page_desc_index;
    unsigned char table_num;
    char name[16];
    unsigned char client_num;
    unsigned char i2c_chip_addr;
    unsigned char start_data_addr;
    unsigned char file_data_addr_off; /* A2_Table_*.txt use defines starting from 0x80, but A0_Upper doesn't */
    unsigned char max_rows;
    signed   char num_exceptions;
    unsigned char exceptions[16];
};

static const struct page_desc page_descs[] = {
    [A0_Lower] =    { A0_Lower,       0, "A0_Lower",    SFP_CLIENT_EEPROM, SFP_I2C_EEPROM_ADDR,    0,    0, 128, 0, {}, },
    [A0_Upper] =    { A0_Upper,       0, "A0_Upper",    SFP_CLIENT_EEPROM, SFP_I2C_EEPROM_ADDR, 0x80,    0, 128, 0, {}, },
    [A2_Lower] =    { A2_Lower,       0, "A2_Lower",    SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,      0,    0, 128, 5, { PWE_7B, PWE_7C, PWE_7D, PWE_7E, TABLE_SEL, }, },
    [A2_Table_00] = { A2_Table_00,    0, "A2_Table_00", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_01] = { A2_Table_01,    1, "A2_Table_01", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_80] = { A2_Table_80, 0x80, "A2_Table_80", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_81] = { A2_Table_81, 0x81, "A2_Table_81", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 2, {SAFE_MODE_STARTUP, EEPROM_CTRL_1, }, },
    [A2_Table_82] = { A2_Table_82, 0x82, "A2_Table_82", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_83] = { A2_Table_83, 0x83, "A2_Table_83", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_84] = { A2_Table_84, 0x84, "A2_Table_84", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_85] = { A2_Table_85, 0x85, "A2_Table_85", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_86] = { A2_Table_86, 0x86, "A2_Table_86", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
    [A2_Table_FF] = { A2_Table_FF, 0xFF, "A2_Table_FF", SFP_CLIENT_DIAG,   SFP_I2C_DIAG_ADDR,   0x80, 0x80, 128, 0, {}, },
};
// FIXME A0_Lower (3F and 5F) and A2_Lower (5F) may be exceptions, CSUM auto computed.  
// but maybe works only with EEPROM, not soft registers

// uncomment 2 #defines below to use simulator in smtc2.c instead of eeprom 
// #define bcmsfp_read_byte  sim_bcmsfp_read_byte
// #define bcmsfp_write_byte sim_bcmsfp_write_byte
extern int sim_bcmsfp_read_byte(u8 bus_num, u8 client_num, u8 offset, u8* val);
extern int sim_bcmsfp_write_byte(u8 bus_num, u8 client_num, u8 offset, u8 val);
static int textbuf_to_array(const struct page_desc *page_desc_p, char *file_buf, u8 *eeprom_buf);
static int array_to_regs(u8 bus_num, const struct page_desc *page_desc_p, const u8 *eeprom_buf);

static inline int is_exception(const struct page_desc *page_desc, u8 data_addr)
{
    int i;

    if (!page_desc || data_addr >= 0x80)
         printk("%s.%d.%s: page_desc=%px, data_addr=0x%02x\n", __FILE__, __LINE__, __FUNCTION__, page_desc, data_addr);

    for (i = 0; i < page_desc->num_exceptions; i++)
        if (data_addr == page_desc->exceptions[i])
            return 1;
    return 0;
}

static inline void s_tolower(char *s)
{
    int i;

    for (i = 0; s[i]; i++)
        s[i] = tolower(s[i]);
}