summaryrefslogtreecommitdiffstats
path: root/ipecamera/model.c
blob: 4e475b1e4d4fae33ed972b538378bec7c9699e0a (plain)
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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
#define _IPECAMERA_MODEL_C
#include <sys/time.h>
#include <assert.h>

#include "../tools.h"
#include "../error.h"
#include "model.h"

#define ADDR_MASK 0x7F00
#define WRITE_BIT 0x8000
#define RETRIES 10

#define READ_READY_BIT 0x20000
#define READ_ERROR_BIT 0x40000

#define ipecamera_datacpy(dst, src, bank)   pcilib_datacpy(dst, src, 4, 1, bank->raw_endianess)

static pcilib_register_value_t ipecamera_bit_mask[9] = { 0, 1, 3, 7, 15, 31, 63, 127, 255 };

int ipecamera_read(pcilib_t *ctx, pcilib_register_bank_description_t *bank, pcilib_register_addr_t addr, uint8_t bits, pcilib_register_value_t *value) {
    uint32_t val;
    char *wr, *rd;
    struct timeval start, cur;
    int retries = RETRIES;
    
    assert(addr < 128);
    
    wr =  pcilib_resolve_register_address(ctx, bank->write_addr);
    rd =  pcilib_resolve_register_address(ctx, bank->read_addr);
    if ((!rd)||(!wr)) {
	pcilib_error("Error resolving addresses of read & write registers");
	return PCILIB_ERROR_INVALID_ADDRESS;
    }

retry:
    val = (addr << 8);
    
    //printf("%i %x %p %p\n", addr,  val, wr, rd);
    
    ipecamera_datacpy(wr, &val, bank);
    
    gettimeofday(&start, NULL);

    ipecamera_datacpy(&val, rd, bank);
    while ((val & READ_READY_BIT) == 0) {
        gettimeofday(&cur, NULL);
	if (((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) > PCILIB_REGISTER_TIMEOUT) break;
	
	ipecamera_datacpy(&val, rd, bank);
    }

    if ((val & READ_READY_BIT) == 0) {
	pcilib_error("Timeout reading register value");
	return PCILIB_ERROR_TIMEOUT;
    }
    
    if (val & READ_ERROR_BIT) {
	pcilib_error("Error reading register value");
	return PCILIB_ERROR_FAILED;
    }

    if (((val&ADDR_MASK) >> 8) != addr) {
	if (--retries > 0) {
	    pcilib_warning("Address verification failed during register read, retrying (try %i of %i)...", RETRIES - retries, RETRIES);
	    goto retry;
	}
	pcilib_error("Address verification failed during register read");
	return PCILIB_ERROR_VERIFY;
    }

    
//    printf("%i\n", val&ipecamera_bit_mask[bits]);

    *value = val&ipecamera_bit_mask[bits];

    return 0;
}

int ipecamera_write(pcilib_t *ctx, pcilib_register_bank_description_t *bank, pcilib_register_addr_t addr, uint8_t bits, pcilib_register_value_t value) {
    uint32_t val;
    char *wr, *rd;
    struct timeval start, cur;
    int retries = RETRIES;
    
    assert(addr < 128);
    assert(value < 256);
    
    wr =  pcilib_resolve_register_address(ctx, bank->write_addr);
    rd =  pcilib_resolve_register_address(ctx, bank->read_addr);
    if ((!rd)||(!wr)) {
	pcilib_error("Error resolving addresses of read & write registers");
	return PCILIB_ERROR_INVALID_ADDRESS;
    }

retry:
    val = WRITE_BIT|(addr << 8)|(value&0xFF);
    
    //printf("%i %x %p %p\n", addr,  val, wr, rd);
    
    ipecamera_datacpy(wr, &val, bank);
    
    gettimeofday(&start, NULL);

    ipecamera_datacpy(&val, rd, bank);
    while ((val & READ_READY_BIT) == 0) {
        gettimeofday(&cur, NULL);
	if (((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) > PCILIB_REGISTER_TIMEOUT) break;
	
	ipecamera_datacpy(&val, rd, bank);
    }

    if ((val & READ_READY_BIT) == 0) {
	if (--retries > 0) {
	    pcilib_warning("Timeout occured during register write, retrying (try %i of %i)...", RETRIES - retries, RETRIES);
	    goto retry;
	}

	pcilib_error("Timeout writting register value");
	return PCILIB_ERROR_TIMEOUT;
    }
    
    if (val & READ_ERROR_BIT) {
	pcilib_error("Error writting register value");
	return PCILIB_ERROR_FAILED;
    }

    if (((val&ADDR_MASK) >> 8) != addr) {
	if (--retries > 0) {
	    pcilib_warning("Address verification failed during register write, retrying (try %i of %i)...", RETRIES - retries, RETRIES);
	    goto retry;
	}
	pcilib_error("Address verification failed during register write");
	return PCILIB_ERROR_VERIFY;
    }
    
    if ((val&ipecamera_bit_mask[bits]) != value) {
	pcilib_error("Value verification failed during register read (%lu != %lu)", val&ipecamera_bit_mask[bits], value);
	return PCILIB_ERROR_VERIFY;
    }

    //printf("%i\n", val&ipecamera_bit_mask[bits]);

    return 0;
}