1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <errno.h>
18 #include <string.h>
19
20 #include <hardware/hardware.h>
21 #include <hardware/nfc.h>
22
23 static uint8_t pn544_eedata_settings[][4] = {
24 // DIFFERENTIAL_ANTENNA
25
26 // RF Settings
27 {0x00,0x9B,0xD1,0x0D} // Tx consumption higher than 0x0D (average 50mA)
28 ,{0x00,0x9B,0xD2,0x24} // GSP setting for this threshold
29 ,{0x00,0x9B,0xD3,0x0A} // Tx consumption higher than 0x0A (average 40mA)
30 ,{0x00,0x9B,0xD4,0x22} // GSP setting for this threshold
31 ,{0x00,0x9B,0xD5,0x08} // Tx consumption higher than 0x08 (average 30mA)
32 ,{0x00,0x9B,0xD6,0x1E} // GSP setting for this threshold
33 ,{0x00,0x9B,0xDD,0x1C} // GSP setting for this threshold
34 ,{0x00,0x9B,0x84,0x13} // ANACM2 setting
35 ,{0x00,0x99,0x81,0x7F} // ANAVMID setting PCD
36 ,{0x00,0x99,0x7A,0x3E} // ANATXMODGSPON
37 ,{0x00,0x99,0x77,0xFF} // ANATXCWGSPON
38 ,{0x00,0x99,0x31,0x70} // ANAVMID setting PICC
39 ,{0x00,0x99,0x2A,0xF5} // ANATXMODGSN-TYPEB
40 #ifdef grouper
41 ,{0x00,0x99,0x29,0xF5} // ANATXMODGSN-TYPEA
42 #else
43 ,{0x00,0x99,0x29,0xFF} // ANATXMODGSN-TYPEA
44 #endif
45 // For tegra we don't override load modulation settings.
46
47 // Enable PBTF
48 ,{0x00,0x98,0x00,0x3F} // SECURE_ELEMENT_CONFIGURATION - No Secure Element
49 ,{0x00,0x9F,0x09,0x00} // SWP_PBTF_RFU
50 ,{0x00,0x9F,0x0A,0x05} // SWP_PBTF_RFLD --> RFLEVEL Detector for PBTF
51 ,{0x00,0x9E,0xD1,0xA1} //
52
53 // Change RF Level Detector ANARFLDWU
54 ,{0x00,0x99,0x23,0x00} // Default Value is 0x01
55
56 // Low-power polling
57 ,{0x00,0x9E,0x74,0xB0} // Default Value is 0x00, bits 0->2: sensitivity (0==max, 6==min),
58 // bit 3: RFU,
59 // bits 4,5 hybrid low-power: # of low-power polls per regular poll
60 // bit 6: RFU
61 // bit 7: (0 -> disabled, 1 -> enabled)
62 ,{0x00,0x9E,0x7D,0xB0} // bits 0->3: RFU,
63 // bits 4,5: # retries after low power detection
64 // 0=1 retry, 1=2 retry, 2=3 retry, 3=4 retry
65 // bit 6: RFU,
66 // bit 7: Enable or disable retry mechanism (0: disable, 1: enable)
67 ,{0x00,0x9F,0x28,0x01} // bits 0->7: # of measurements per low-power poll
68
69 // Polling Loop - Card Emulation Timeout
70 ,{0x00,0x9F,0x35,0x14} // Time for which PN544 stays in Card Emulation mode after leaving RF field
71 ,{0x00,0x9F,0x36,0x60} // Default value 0x0411 = 50 ms ---> New Value : 0x1460 = 250 ms
72
73 //LLC Timer
74 ,{0x00,0x9C,0x31,0x00} // Guard host time-out in ms (MSB)
75 ,{0x00,0x9C,0x32,0xC8} // Guard host time-out in ms (LSB)
76 ,{0x00,0x9C,0x19,0x40} // Max RX retry (PN544=>host?)
77 ,{0x00,0x9C,0x1A,0x40} // Max TX retry (PN544=>host?)
78
79 ,{0x00,0x9C,0x0C,0x00} //
80 ,{0x00,0x9C,0x0D,0x00} //
81 ,{0x00,0x9C,0x12,0x00} //
82 ,{0x00,0x9C,0x13,0x00} //
83
84 //WTX for LLCP communication
85 ,{0x00,0x98,0xA2,0x0E} // Max value: 14 (default value: 09)
86
87 //SE GPIO
88 ,{0x00, 0x98, 0x93, 0x40}
89
90 // Set NFCT ATQA
91 ,{0x00, 0x98, 0x7D, 0x02}
92 ,{0x00, 0x98, 0x7E, 0x00}
93
94 // Enable CEA detection mechanism
95 ,{0x00, 0x9F, 0xC8, 0x01}
96 // Set NFC-F poll RC=0x00
97 ,{0x00, 0x9F, 0x9A, 0x00}
98 // Setting for EMD support for ISO 14443-4 Reader
99 ,{0x00,0x9F,0x09,0x00} // 0x00 - Disable EMD support, 0x01 - Enable EMD support
100 };
101
pn544_close(hw_device_t * dev)102 static int pn544_close(hw_device_t *dev) {
103 free(dev);
104
105 return 0;
106 }
107
108 /*
109 * Generic device handling
110 */
111
nfc_open(const hw_module_t * module,const char * name,hw_device_t ** device)112 static int nfc_open(const hw_module_t* module, const char* name,
113 hw_device_t** device) {
114 if (strcmp(name, NFC_PN544_CONTROLLER) == 0) {
115 nfc_pn544_device_t *dev = calloc(1, sizeof(nfc_pn544_device_t));
116
117 dev->common.tag = HARDWARE_DEVICE_TAG;
118 dev->common.version = 0;
119 dev->common.module = (struct hw_module_t*) module;
120 dev->common.close = pn544_close;
121
122 dev->num_eeprom_settings = sizeof(pn544_eedata_settings) / 4;
123 dev->eeprom_settings = (uint8_t*)pn544_eedata_settings;
124 dev->linktype = PN544_LINK_TYPE_I2C;
125 dev->device_node = "/dev/pn544";
126 dev->enable_i2c_workaround = 1;
127 dev->i2c_device_address = 0x51;
128 *device = (hw_device_t*) dev;
129 return 0;
130 } else {
131 return -EINVAL;
132 }
133 }
134
135 static struct hw_module_methods_t nfc_module_methods = {
136 .open = nfc_open,
137 };
138
139 struct nfc_module_t HAL_MODULE_INFO_SYM = {
140 .common = {
141 .tag = HARDWARE_MODULE_TAG,
142 .version_major = 1,
143 .version_minor = 0,
144 .id = NFC_HARDWARE_MODULE_ID,
145 .name = "Tegra NFC HW HAL",
146 .author = "The Android Open Source Project",
147 .methods = &nfc_module_methods,
148 },
149 };
150