| 1 | /****************************************************************************** |
| 2 | ** |
| 3 | ** FILE NAME : ifxmips_deu_danube.c |
| 4 | ** PROJECT : IFX UEIP |
| 5 | ** MODULES : DEU Module for Danube |
| 6 | ** |
| 7 | ** DATE : September 8, 2009 |
| 8 | ** AUTHOR : Mohammad Firdaus |
| 9 | ** DESCRIPTION : Data Encryption Unit Driver |
| 10 | ** COPYRIGHT : Copyright (c) 2009 |
| 11 | ** Infineon Technologies AG |
| 12 | ** Am Campeon 1-12, 85579 Neubiberg, Germany |
| 13 | ** |
| 14 | ** This program is free software; you can redistribute it and/or modify |
| 15 | ** it under the terms of the GNU General Public License as published by |
| 16 | ** the Free Software Foundation; either version 2 of the License, or |
| 17 | ** (at your option) any later version. |
| 18 | ** |
| 19 | ** HISTORY |
| 20 | ** $Date $Author $Comment |
| 21 | ** 08,Sept 2009 Mohammad Firdaus Initial UEIP release |
| 22 | *******************************************************************************/ |
| 23 | /*! |
| 24 | \defgroup IFX_DEU IFX_DEU_DRIVERS |
| 25 | \ingroup API |
| 26 | \brief deu driver module |
| 27 | */ |
| 28 | |
| 29 | /*! |
| 30 | \file ifxmips_deu_danube.c |
| 31 | \ingroup IFX_DEU |
| 32 | \brief board specific deu driver file for danube |
| 33 | */ |
| 34 | |
| 35 | /*! |
| 36 | \defgroup BOARD_SPECIFIC_FUNCTIONS IFX_BOARD_SPECIFIC_FUNCTIONS |
| 37 | \ingroup IFX_DEU |
| 38 | \brief board specific deu functions |
| 39 | */ |
| 40 | |
| 41 | /* Project header files */ |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/init.h> |
| 44 | #include <linux/types.h> |
| 45 | #include <linux/errno.h> |
| 46 | #include <asm/io.h> //dma_cache_inv |
| 47 | |
| 48 | #include "ifxmips_deu_dma.h" |
| 49 | #include "ifxmips_deu_danube.h" |
| 50 | |
| 51 | |
| 52 | /* Function Declerations */ |
| 53 | int aes_memory_allocate(int value); |
| 54 | int des_memory_allocate(int value); |
| 55 | void memory_release(u32 *addr); |
| 56 | int aes_chip_init (void); |
| 57 | void des_chip_init (void); |
| 58 | int deu_dma_init (void); |
| 59 | u32 endian_swap(u32 input); |
| 60 | u32* memory_alignment(const u8 *arg, u32 *buff_alloc, int in_out, int nbytes); |
| 61 | void dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); |
| 62 | void chip_version(void); |
| 63 | void deu_dma_priv_init(void); |
| 64 | void __exit ifxdeu_fini_dma(void); |
| 65 | |
| 66 | #define DES_3DES_START IFX_DES_CON |
| 67 | #define AES_START IFX_AES_CON |
| 68 | #define CLC_START IFX_DEU_CLK |
| 69 | |
| 70 | /* Variables definition */ |
| 71 | int ifx_danube_pre_1_4; |
| 72 | u8 *g_dma_page_ptr = NULL; |
| 73 | u8 *g_dma_block = NULL; |
| 74 | u8 *g_dma_block2 = NULL; |
| 75 | |
| 76 | deu_drv_priv_t deu_dma_priv; |
| 77 | |
| 78 | |
| 79 | /*! \fn u32 endian_swap(u32 input) |
| 80 | * \ingroup BOARD_SPECIFIC_FUNCTIONS |
| 81 | * \brief function is not used |
| 82 | * \param input Data input to be swapped |
| 83 | * \return input |
| 84 | */ |
| 85 | |
| 86 | u32 endian_swap(u32 input) |
| 87 | { |
| 88 | return input; |
| 89 | } |
| 90 | |
| 91 | /*! \fn u32 input_swap(u32 input) |
| 92 | * \ingroup BOARD_SPECIFIC_FUNCTIONS |
| 93 | * \brief Swap the input data if the current chip is Danube version |
| 94 | * 1.4 and do nothing to the data if the current chip is |
| 95 | * Danube version 1.3 |
| 96 | * \param input data that needs to be swapped |
| 97 | * \return input or swapped input |
| 98 | */ |
| 99 | |
| 100 | u32 input_swap(u32 input) |
| 101 | { |
| 102 | if (!ifx_danube_pre_1_4) { |
| 103 | u8 *ptr = (u8 *)&input; |
| 104 | return ((ptr[3] << 24) | (ptr[2] << 16) | (ptr[1] << 8) | ptr[0]); |
| 105 | } |
| 106 | else |
| 107 | return input; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | |
| 112 | /*! \fn void aes_chip_init (void) |
| 113 | * \ingroup BOARD_SPECIFIC_FUNCTIONS |
| 114 | * \brief initialize AES hardware |
| 115 | */ |
| 116 | |
| 117 | int aes_chip_init (void) |
| 118 | { |
| 119 | volatile struct aes_t *aes = (struct aes_t *) AES_START; |
| 120 | |
| 121 | //start crypto engine with write to ILR |
| 122 | aes->controlr.SM = 1; |
| 123 | aes->controlr.ARS = 1; |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | /*! \fn void des_chip_init (void) |
| 128 | * \ingroup BOARD_SPECIFIC_FUNCTIONS |
| 129 | * \brief initialize DES hardware |
| 130 | */ |
| 131 | |
| 132 | void des_chip_init (void) |
| 133 | { |
| 134 | volatile struct des_t *des = (struct des_t *) DES_3DES_START; |
| 135 | |
| 136 | // start crypto engine with write to ILR |
| 137 | des->controlr.SM = 1; |
| 138 | des->controlr.ARS = 1; |
| 139 | } |
| 140 | |
| 141 | /*! \fn void chip_version (void) |
| 142 | * \ingroup IFX_DES_FUNCTIONS |
| 143 | * \brief To find the version of the chip by looking at the chip ID |
| 144 | * \param ifx_danube_pre_1_4 (sets to 1 if Chip is Danube less than v1.4) |
| 145 | */ |
| 146 | #define IFX_MPS (KSEG1 | 0x1F107000) |
| 147 | #define IFX_MPS_CHIPID ((volatile u32*)(IFX_MPS + 0x0344)) |
| 148 | |
| 149 | void chip_version(void) |
| 150 | { |
| 151 | |
| 152 | /* DANUBE PRE 1.4 SOFTWARE FIX */ |
| 153 | int chip_id = 0; |
| 154 | chip_id = *IFX_MPS_CHIPID; |
| 155 | chip_id >>= 28; |
| 156 | |
| 157 | if (chip_id >= 4) { |
| 158 | ifx_danube_pre_1_4 = 0; |
| 159 | printk("Danube Chip ver. 1.4 detected. \n"); |
| 160 | } |
| 161 | else { |
| 162 | ifx_danube_pre_1_4 = 1; |
| 163 | printk("Danube Chip ver. 1.3 or below detected. \n"); |
| 164 | } |
| 165 | |
| 166 | return; |
| 167 | } |
| 168 | |
| 169 | |
