am7xxx: update signature and documentation of am7xxx_set_power_mode()

[libam7xxx.git] / src / am7xxx.c

diff --git a/src/am7xxx.c b/src/am7xxx.c
index aaab4f4..5b98b84 100644 (file)
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -116,7 +116,7 @@ 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_ZOOM    = 0x05,
 } am7xxx_packet_type;
 
 struct am7xxx_generic_header {
@@ -146,6 +146,11 @@ struct am7xxx_power_header {
        uint32_t bit0;
 };
 
+struct am7xxx_zoom_header {
+       uint32_t bit1;
+       uint32_t bit0;
+};
+
 /*
  * Examples of packet headers:
  *
@@ -156,9 +161,13 @@ struct am7xxx_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
  */
 
+/* Direction of the communication from the host point of view */
+#define AM7XXX_DIRECTION_OUT 0 /* host -> device */
+#define AM7XXX_DIRECTION_IN  1 /* host <- device */
+
 struct am7xxx_header {
        uint32_t packet_type;
-       uint8_t unknown0;
+       uint8_t direction;
        uint8_t header_data_len;
        uint8_t unknown2;
        uint8_t unknown3;
@@ -167,6 +176,7 @@ struct am7xxx_header {
                struct am7xxx_devinfo_header devinfo;
                struct am7xxx_image_header image;
                struct am7xxx_power_header power;
+               struct am7xxx_zoom_header zoom;
        } header_data;
 };
 
@@ -207,6 +217,16 @@ static void debug_dump_power_header(am7xxx_context *ctx, struct am7xxx_power_hea
        debug(ctx, "\tbit0: 0x%08x (%u)\n", p->bit0, p->bit0);
 }
 
+static void debug_dump_zoom_header(am7xxx_context *ctx, struct am7xxx_zoom_header *z)
+{
+       if (ctx == NULL || z == NULL)
+               return;
+
+       debug(ctx, "Zoom header:\n");
+       debug(ctx, "\tbit1: 0x%08x (%u)\n", z->bit1, z->bit1);
+       debug(ctx, "\tbit0: 0x%08x (%u)\n", z->bit0, z->bit0);
+}
+
 static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
 {
        if (ctx == NULL || h == NULL)
@@ -214,7 +234,7 @@ static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
 
        debug(ctx, "BEGIN\n");
        debug(ctx, "packet_type:     0x%08x (%u)\n", h->packet_type, h->packet_type);
-       debug(ctx, "unknown0:        0x%02hhx (%hhu)\n", h->unknown0, h->unknown0);
+       debug(ctx, "direction:       0x%02hhx (%hhu)\n", h->direction, h->direction);
        debug(ctx, "header_data_len: 0x%02hhx (%hhu)\n", h->header_data_len, h->header_data_len);
        debug(ctx, "unknown2:        0x%02hhx (%hhu)\n", h->unknown2, h->unknown2);
        debug(ctx, "unknown3:        0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
@@ -232,6 +252,10 @@ static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
                debug_dump_power_header(ctx, &(h->header_data.power));
                break;
 
+       case AM7XXX_PACKET_TYPE_ZOOM:
+               debug_dump_zoom_header(ctx, &(h->header_data.zoom));
+               break;
+
        default:
                debug(ctx, "Packet type not supported!\n");
                break;
@@ -319,7 +343,7 @@ static void serialize_header(struct am7xxx_header *h, uint8_t *buffer)
        uint8_t **buffer_iterator = &buffer;
 
        put_le32(h->packet_type, buffer_iterator);
-       put_8(h->unknown0, buffer_iterator);
+       put_8(h->direction, buffer_iterator);
        put_8(h->header_data_len, buffer_iterator);
        put_8(h->unknown2, buffer_iterator);
        put_8(h->unknown3, buffer_iterator);
@@ -334,7 +358,7 @@ 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->direction = get_8(buffer_iterator);
        h->header_data_len = get_8(buffer_iterator);
        h->unknown2 = get_8(buffer_iterator);
        h->unknown3 = get_8(buffer_iterator);
@@ -356,7 +380,13 @@ static int read_header(am7xxx_device *dev, struct am7xxx_header *h)
 
        debug_dump_header(dev->ctx, h);
 
-       ret = 0;
+       if (h->direction == AM7XXX_DIRECTION_IN) {
+               ret = 0;
+       } else {
+               error(dev->ctx,
+                     "Received a packet with direction AM7XXX_DIRECTION_OUT, weird!\n");
+               ret = -EINVAL;
+       }
 
 out:
        return ret;
@@ -685,7 +715,7 @@ AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
        int ret;
        struct am7xxx_header h = {
                .packet_type     = AM7XXX_PACKET_TYPE_DEVINFO,
-               .unknown0        = 0x00,
+               .direction       = AM7XXX_DIRECTION_OUT,
                .header_data_len = 0x00,
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
@@ -790,7 +820,7 @@ AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev,
        int ret;
        struct am7xxx_header h = {
                .packet_type     = AM7XXX_PACKET_TYPE_IMAGE,
-               .unknown0        = 0x00,
+               .direction       = AM7XXX_DIRECTION_OUT,
                .header_data_len = sizeof(struct am7xxx_image_header),
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
@@ -816,18 +846,18 @@ AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev,
        return send_data(dev, image, image_size);
 }
 
-AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode mode)
+AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
 {
        int ret;
        struct am7xxx_header h = {
                .packet_type     = AM7XXX_PACKET_TYPE_POWER,
-               .unknown0        = 0x00,
+               .direction       = AM7XXX_DIRECTION_OUT,
                .header_data_len = sizeof(struct am7xxx_power_header),
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
        };
 
-       switch(mode) {
+       switch(power) {
        case AM7XXX_POWER_OFF:
                h.header_data.power.bit2 = 0;
                h.header_data.power.bit1 = 0;
@@ -838,6 +868,7 @@ AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode mo
                h.header_data.power.bit2 = 0;
                h.header_data.power.bit1 = 0;
                h.header_data.power.bit0 = 1;
+               break;
 
        case AM7XXX_POWER_MIDDLE:
                h.header_data.power.bit2 = 0;
@@ -858,7 +889,51 @@ AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode mo
                break;
 
        default:
-               error(dev->ctx, "Power mode not supported!\n");
+               error(dev->ctx, "Unsupported power mode.\n");
+               return -EINVAL;
+       };
+
+       ret = send_header(dev, &h);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+AM7XXX_PUBLIC int am7xxx_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
+{
+       int ret;
+       struct am7xxx_header h = {
+               .packet_type     = AM7XXX_PACKET_TYPE_ZOOM,
+               .direction       = AM7XXX_DIRECTION_OUT,
+               .header_data_len = sizeof(struct am7xxx_zoom_header),
+               .unknown2        = 0x3e,
+               .unknown3        = 0x10,
+       };
+
+       switch(zoom) {
+       case AM7XXX_ZOOM_ORIGINAL:
+               h.header_data.zoom.bit1 = 0;
+               h.header_data.zoom.bit0 = 0;
+               break;
+
+       case AM7XXX_ZOOM_H:
+               h.header_data.zoom.bit1 = 0;
+               h.header_data.zoom.bit0 = 1;
+               break;
+
+       case AM7XXX_ZOOM_H_V:
+               h.header_data.zoom.bit1 = 1;
+               h.header_data.zoom.bit0 = 0;
+               break;
+
+       case AM7XXX_ZOOM_TEST:
+               h.header_data.zoom.bit1 = 1;
+               h.header_data.zoom.bit0 = 1;
+               break;
+
+       default:
+               error(dev->ctx, "Unsupported zoom mode.\n");
                return -EINVAL;
        };