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#define _IPECAMERA_C
#include <sys/time.h>
#include <assert.h>
#include "tools.h"
#include "ipecamera.h"
#include "error.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) {
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 read, 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;
}
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