1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* Copyright (C) ST-Ericsson SA 2011
*
* Author: Jens Wiklander <jens.wiklander@stericsson.com>
* Author: Jonas Aaberg <jonas.aberg@stericsson.com>
* Author: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
*
* License terms: GNU General Public License (GPL) version 2
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/tee.h>
#include <linux/module.h>
#include <mach/hardware.h>
#define STATIC_TEE_TA_START_LOW 0xBC765EDE
#define STATIC_TEE_TA_START_MID 0x6724
#define STATIC_TEE_TA_START_HIGH 0x11DF
#define STATIC_TEE_TA_START_CLOCKSEQ \
{0x8E, 0x12, 0xEC, 0xDB, 0xDF, 0xD7, 0x20, 0x85}
#define U5500_PRCMU_DBG_PWRCTRL (U5500_PRCMU_BASE + 0x4AC)
#define PRCMU_DBG_PWRCTRL_A9DBGCLKEN (1 << 4)
static struct tee_product_config product_config;
bool ux500_jtag_enabled(void)
{
#ifdef CONFIG_UX500_DEBUG_NO_LAUTERBACH
return false;
#else
if (cpu_is_u5500())
return readl_relaxed(__io_address(U5500_PRCMU_DBG_PWRCTRL))
& PRCMU_DBG_PWRCTRL_A9DBGCLKEN;
if (cpu_is_u8500())
return (product_config.rt_flags & TEE_RT_FLAGS_JTAG_ENABLED) ==
TEE_RT_FLAGS_JTAG_ENABLED;
return true;
#endif
}
static int __init product_detect(void)
{
int err;
int origin_err;
struct tee_operation operation = { { { 0 } } };
struct tee_context context;
struct tee_session session;
/* Selects trustzone application needed for the job. */
struct tee_uuid static_uuid = {
STATIC_TEE_TA_START_LOW,
STATIC_TEE_TA_START_MID,
STATIC_TEE_TA_START_HIGH,
STATIC_TEE_TA_START_CLOCKSEQ,
};
if (cpu_is_u5500())
return -ENODEV;
err = teec_initialize_context(NULL, &context);
if (err) {
pr_err("ux500-product: unable to initialize tee context,"
" err = %d\n", err);
err = -EINVAL;
goto error0;
}
err = teec_open_session(&context, &session, &static_uuid,
TEEC_LOGIN_PUBLIC, NULL, NULL, &origin_err);
if (err) {
pr_err("ux500-product: unable to open tee session,"
" tee error = %d, origin error = %d\n",
err, origin_err);
err = -EINVAL;
goto error1;
}
operation.shm[0].buffer = &product_config;
operation.shm[0].size = sizeof(product_config);
operation.shm[0].flags = TEEC_MEM_OUTPUT;
operation.flags = TEEC_MEMREF_0_USED;
err = teec_invoke_command(&session,
TEE_STA_GET_PRODUCT_CONFIG,
&operation, &origin_err);
if (err) {
pr_err("ux500-product: fetching product settings failed, err=%d",
err);
err = -EINVAL;
goto error1;
}
switch(product_config.product_id) {
case TEE_PRODUCT_ID_8400:
pr_info("ux500-product: u8400 detected\n");
break;
case TEE_PRODUCT_ID_8500:
pr_info("ux500-product: u8500 detected\n");
break;
case TEE_PRODUCT_ID_9500:
pr_info("ux500-product: u9500 detected\n");
break;
case TEE_PRODUCT_ID_5500:
pr_info("ux500-product: u5500 detected\n");
break;
case TEE_PRODUCT_ID_7400:
pr_info("ux500-product: u7400 detected\n");
break;
case TEE_PRODUCT_ID_8500C:
pr_info("ux500-product: u8500C detected\n");
break;
case TEE_PRODUCT_ID_UNKNOWN:
default:
pr_info("ux500-product: UNKNOWN! (0x%x) detected\n",
product_config.product_id);
break;
}
pr_info("ux500-product: JTAG is %s\n",
ux500_jtag_enabled()? "enabled" : "disabled");
error1:
(void) teec_finalize_context(&context);
error0:
return err;
}
device_initcall(product_detect);
|
