diff options
Diffstat (limited to 'ipecamera/model.c')
| -rw-r--r-- | ipecamera/model.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/ipecamera/model.c b/ipecamera/model.c new file mode 100644 index 0000000..4e475b1 --- /dev/null +++ b/ipecamera/model.c @@ -0,0 +1,147 @@ +#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; +} + + + |