#define AM7XXX_VENDOR_ID 0x1de1
#define AM7XXX_PRODUCT_ID 0xc101
+typedef enum {
+ AM7XXX_PACKET_TYPE_DEVINFO = 0x01,
+ AM7XXX_PACKET_TYPE_IMAGE = 0x02,
+ AM7XXX_PACKET_TYPE_POWER = 0x04,
+ AM7XXX_PACKET_TYPE_UNKNOWN = 0x05,
+} am7xxx_packet_type;
+
+struct am7xxx_generic_header {
+ uint32_t field0;
+ uint32_t field1;
+ uint32_t field2;
+ uint32_t field3;
+};
+
+struct am7xxx_devinfo_header {
+ uint32_t native_width;
+ uint32_t native_height;
+ uint32_t unknown0;
+ uint32_t unknown1;
+};
+
+struct am7xxx_image_header {
+ uint32_t format;
+ uint32_t width;
+ uint32_t height;
+ uint32_t image_size;
+};
+
+struct am7xxx_power_header {
+ uint32_t bit2;
+ uint32_t bit1;
+ uint32_t bit0;
+};
+
+/*
+ * Examples of packet headers:
+ *
+ * Image header:
+ * 02 00 00 00 00 10 3e 10 01 00 00 00 20 03 00 00 e0 01 00 00 53 E8 00 00
+ *
+ * Power header:
+ * 04 00 00 00 00 0c ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ */
+
+/* The header size on the wire is known to be always 24 bytes, regardless of
+ * the memory configuration enforced by different architechtures or compilers
+ * for struct am7xxx_header
+ */
+#define AM7XXX_HEADER_WIRE_SIZE 24
+
+struct am7xxx_header {
+ uint32_t packet_type;
+ uint8_t unknown0;
+ uint8_t header_data_len;
+ uint8_t unknown2;
+ uint8_t unknown3;
+ union {
+ struct am7xxx_generic_header data;
+ struct am7xxx_devinfo_header devinfo;
+ struct am7xxx_image_header image;
+ struct am7xxx_power_header power;
+ } header_data;
+};
+
+
+static void dump_devinfo_header(struct am7xxx_devinfo_header *d)
+{
+ if (d == NULL)
+ return;
+
+ printf("Info header:\n");
+ printf("\tnative_width: 0x%08x (%u)\n", d->native_width, d->native_width);
+ printf("\tnative_height: 0x%08x (%u)\n", d->native_height, d->native_height);
+ printf("\tunknown0: 0x%08x (%u)\n", d->unknown0, d->unknown0);
+ printf("\tunknown1: 0x%08x (%u)\n", d->unknown1, d->unknown1);
+}
+
static void dump_image_header(struct am7xxx_image_header *i)
{
if (i == NULL)
printf("unknown3: 0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
switch(h->packet_type) {
+ case AM7XXX_PACKET_TYPE_DEVINFO:
+ dump_devinfo_header(&(h->header_data.devinfo));
+ break;
+
case AM7XXX_PACKET_TYPE_IMAGE:
dump_image_header(&(h->header_data.image));
break;
fflush(stdout);
}
+static int read_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
+{
+ int ret;
+ int transferred;
+
+ ret = libusb_bulk_transfer(dev, 0x81, buffer, len, &transferred, 0);
+ if (ret != 0 || (unsigned int)transferred != len) {
+ fprintf(stderr, "Error: ret: %d\ttransferred: %d (expected %u)\n",
+ ret, transferred, len);
+ return ret;
+ }
+
+#if DEBUG
+ printf("\n<-- received\n");
+ dump_buffer(buffer, len);
+ printf("\n");
+#endif
+
+ return 0;
+}
+
static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
{
int ret;
int transferred;
#if DEBUG
+ printf("\nsending -->\n");
dump_buffer(buffer, len);
printf("\n");
#endif
put_le32(h->header_data.data.field3, buffer_iterator);
}
+static void unserialize_header(uint8_t *buffer, struct am7xxx_header *h)
+{
+ uint8_t **buffer_iterator = &buffer;
+
+ h->packet_type = get_le32(buffer_iterator);
+ h->unknown0 = get_8(buffer_iterator);
+ h->header_data_len = get_8(buffer_iterator);
+ h->unknown2 = get_8(buffer_iterator);
+ h->unknown3 = get_8(buffer_iterator);
+ h->header_data.data.field0 = get_le32(buffer_iterator);
+ h->header_data.data.field1 = get_le32(buffer_iterator);
+ h->header_data.data.field2 = get_le32(buffer_iterator);
+ h->header_data.data.field3 = get_le32(buffer_iterator);
+}
+
+static int read_header(am7xxx_device dev, struct am7xxx_header *h)
+{
+ uint8_t *buffer;
+ int ret;
+
+ buffer = calloc(AM7XXX_HEADER_WIRE_SIZE, 1);
+ if (buffer == NULL) {
+ perror("calloc buffer");
+ return -ENOMEM;
+ }
+
+ ret = read_data(dev, buffer, AM7XXX_HEADER_WIRE_SIZE);
+ if (ret < 0)
+ goto out;
+
+ unserialize_header(buffer, h);
+
+#if DEBUG
+ printf("\n");
+ dump_header(h);
+ printf("\n");
+#endif
+
+ ret = 0;
+
+out:
+ free(buffer);
+ return ret;
+}
+
static int send_header(am7xxx_device dev, struct am7xxx_header *h)
{
uint8_t *buffer;
int ret;
#if DEBUG
+ printf("\n");
dump_header(h);
printf("\n");
#endif
}
}
+int am7xxx_get_device_info(am7xxx_device dev,
+ unsigned int *native_width,
+ unsigned int *native_height,
+ unsigned int *unknown0,
+ unsigned int *unknown1)
+{
+ int ret;
+ struct am7xxx_header h = {
+ .packet_type = AM7XXX_PACKET_TYPE_DEVINFO,
+ .unknown0 = 0x00,
+ .header_data_len = 0x00,
+ .unknown2 = 0x3e,
+ .unknown3 = 0x10,
+ .header_data = {
+ .devinfo = {
+ .native_width = 0,
+ .native_height = 0,
+ .unknown0 = 0,
+ .unknown1 = 0,
+ },
+ },
+ };
+
+ ret = send_header(dev, &h);
+ if (ret < 0)
+ return ret;
+
+ ret = read_header(dev, &h);
+ if (ret < 0)
+ return ret;
+
+ *native_width = h.header_data.devinfo.native_width;
+ *native_height = h.header_data.devinfo.native_height;
+ *unknown0 = h.header_data.devinfo.unknown0;
+ *unknown1 = h.header_data.devinfo.unknown1;
+
+ return 0;
+}
+
int am7xxx_send_image(am7xxx_device dev,
am7xxx_image_format format,
unsigned int width,
projects / libam7xxx.git / blobdiff