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1 office 1 /******************************************************************************
2 **
3 ** FILE NAME : ifxmips_deu.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 /*!
25 \defgroup IFX_DEU IFX_DEU_DRIVERS
26 \ingroup API
27 \brief ifx deu driver module
28 */
29  
30 /*!
31 \file ifxmips_deu.c
32 \ingroup IFX_DEU
33 \brief main deu driver file
34 */
35  
36 /*!
37 \defgroup IFX_DEU_FUNCTIONS IFX_DEU_FUNCTIONS
38 \ingroup IFX_DEU
39 \brief IFX DEU functions
40 */
41  
42 /* Project header */
43 #include <linux/version.h>
44 #if defined(CONFIG_MODVERSIONS)
45 #define MODVERSIONS
46 #include <linux/modversions.h>
47 #endif
48 #include <linux/module.h>
49 #include <linux/init.h>
50 #include <linux/types.h>
51 #include <linux/errno.h>
52 #include <linux/crypto.h>
53 #include <linux/proc_fs.h>
54 #include <linux/platform_device.h>
55 #include <linux/fs.h> /* Stuff about file systems that we need */
56 #include <asm/byteorder.h>
57 #include "ifxmips_deu.h"
58  
59 #include <lantiq_soc.h>
60  
61 #if defined(CONFIG_DANUBE)
62 #include "ifxmips_deu_danube.h"
63 #elif defined(CONFIG_AR9)
64 #include "ifxmips_deu_ar9.h"
65 #elif defined(CONFIG_VR9) || defined(CONFIG_AR10)
66 #include "ifxmips_deu_vr9.h"
67 #else
68 #error "Platform unknown!"
69 #endif /* CONFIG_xxxx */
70  
71 int disable_deudma = 1;
72  
73 void chip_version(void);
74  
75 /*! \fn static int __init deu_init (void)
76 * \ingroup IFX_DEU_FUNCTIONS
77 * \brief link all modules that have been selected in kernel config for ifx hw crypto support
78 * \return ret
79 */
80  
81 static int ltq_deu_probe(struct platform_device *pdev)
82 {
83 int ret = -ENOSYS;
84  
85  
86 START_DEU_POWER;
87  
88 #define IFX_DEU_DRV_VERSION "2.0.0"
89 printk(KERN_INFO "Infineon Technologies DEU driver version %s \n", IFX_DEU_DRV_VERSION);
90  
91 FIND_DEU_CHIP_VERSION;
92  
93 #if defined(CONFIG_CRYPTO_DEV_DES)
94 if ((ret = ifxdeu_init_des ())) {
95 printk (KERN_ERR "IFX DES initialization failed!\n");
96 }
97 #endif
98 #if defined(CONFIG_CRYPTO_DEV_AES)
99 if ((ret = ifxdeu_init_aes ())) {
100 printk (KERN_ERR "IFX AES initialization failed!\n");
101 }
102  
103 #endif
104 #if defined(CONFIG_CRYPTO_DEV_ARC4)
105 if ((ret = ifxdeu_init_arc4 ())) {
106 printk (KERN_ERR "IFX ARC4 initialization failed!\n");
107 }
108  
109 #endif
110 #if defined(CONFIG_CRYPTO_DEV_SHA1)
111 if ((ret = ifxdeu_init_sha1 ())) {
112 printk (KERN_ERR "IFX SHA1 initialization failed!\n");
113 }
114 #endif
115 #if defined(CONFIG_CRYPTO_DEV_MD5)
116 if ((ret = ifxdeu_init_md5 ())) {
117 printk (KERN_ERR "IFX MD5 initialization failed!\n");
118 }
119  
120 #endif
121 #if defined(CONFIG_CRYPTO_DEV_SHA1_HMAC)
122 if ((ret = ifxdeu_init_sha1_hmac ())) {
123 printk (KERN_ERR "IFX SHA1_HMAC initialization failed!\n");
124 }
125 #endif
126 #if defined(CONFIG_CRYPTO_DEV_MD5_HMAC)
127 if ((ret = ifxdeu_init_md5_hmac ())) {
128 printk (KERN_ERR "IFX MD5_HMAC initialization failed!\n");
129 }
130 #endif
131  
132  
133  
134 return ret;
135  
136 }
137  
138 /*! \fn static void __exit deu_fini (void)
139 * \ingroup IFX_DEU_FUNCTIONS
140 * \brief remove the loaded crypto algorithms
141 */
142 static int ltq_deu_remove(struct platform_device *pdev)
143 {
144 //#ifdef CONFIG_CRYPTO_DEV_PWR_SAVE_MODE
145 #if defined(CONFIG_CRYPTO_DEV_DES)
146 ifxdeu_fini_des ();
147 #endif
148 #if defined(CONFIG_CRYPTO_DEV_AES)
149 ifxdeu_fini_aes ();
150 #endif
151 #if defined(CONFIG_CRYPTO_DEV_ARC4)
152 ifxdeu_fini_arc4 ();
153 #endif
154 #if defined(CONFIG_CRYPTO_DEV_SHA1)
155 ifxdeu_fini_sha1 ();
156 #endif
157 #if defined(CONFIG_CRYPTO_DEV_MD5)
158 ifxdeu_fini_md5 ();
159 #endif
160 #if defined(CONFIG_CRYPTO_DEV_SHA1_HMAC)
161 ifxdeu_fini_sha1_hmac ();
162 #endif
163 #if defined(CONFIG_CRYPTO_DEV_MD5_HMAC)
164 ifxdeu_fini_md5_hmac ();
165 #endif
166 printk("DEU has exited successfully\n");
167  
168 return 0;
169 }
170  
171  
172 int disable_multiblock = 0;
173  
174 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
175 module_param(disable_multiblock,int,0);
176  
177 #else
178 //MODULE_PARM (disable_multiblock, "i");
179 MODULE_PARM_DESC (disable_multiblock,
180 "Disable encryption of whole multiblock buffers.");
181 #endif
182  
183 static const struct of_device_id ltq_deu_match[] = {
184 #ifdef CONFIG_DANUBE
185 { .compatible = "lantiq,deu-danube"},
186 #elif defined CONFIG_AR9
187 { .compatible = "lantiq,deu-arx100"},
188 #elif defined CONFIG_VR9
189 { .compatible = "lantiq,deu-xrx200"},
190 #endif
191 {},
192 };
193 MODULE_DEVICE_TABLE(of, ltq_deu_match);
194  
195  
196 static struct platform_driver ltq_deu_driver = {
197 .probe = ltq_deu_probe,
198 .remove = ltq_deu_remove,
199 .driver = {
200 .name = "deu",
201 .owner = THIS_MODULE,
202 .of_match_table = ltq_deu_match,
203 },
204 };
205  
206 module_platform_driver(ltq_deu_driver);
207  
208 MODULE_DESCRIPTION ("Infineon DEU crypto engine support.");
209 MODULE_LICENSE ("GPL");
210 MODULE_AUTHOR ("Mohammad Firdaus");