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aes3k: Re-send some commands for each capture

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The driver seems to have relied on the device to be fully
deactivated and activated again for each capture. This is not the case
during enroll, and as such in can cause issues.

Try fixing this by splitting out the last few commands send to the
device and assuming that this starts the capture.

Fixes: #306
This commit is contained in:
Benjamin Berg
2020-10-01 18:38:07 +02:00
parent c7cab77fc1
commit 81e0f4dfe5
4 changed files with 68 additions and 19 deletions
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4
libfprint/drivers/aes4000.c
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@@ -103,7 +103,9 @@ static struct aes_regwrite init_reqs[] = {
{ 0x9e, 0x53 }, /* clear challenge word bits */
{ 0x9f, 0x6b }, /* set some challenge word bits */
{ 0, 0 },
};
static struct aes_regwrite capture_reqs[] = {
{ 0x80, 0x00 },
{ 0x81, 0x00 },
{ 0, 0 },
@@ -152,4 +154,6 @@ fpi_device_aes4000_class_init (FpiDeviceAes4000Class *klass)
aes_class->enlarge_factor = ENLARGE_FACTOR;
aes_class->init_reqs = init_reqs;
aes_class->init_reqs_len = G_N_ELEMENTS (init_reqs);
aes_class->capture_reqs = capture_reqs;
aes_class->capture_reqs_len = G_N_ELEMENTS (capture_reqs);
}