From: Antonio Ospite Date: Tue, 12 Jun 2012 10:48:28 +0000 (+0200) Subject: am7xxx: rename am7xxx_header.unknown0 to am7xxx_header.direction X-Git-Tag: v0.1.3~21 X-Git-Url: https://git.ao2.it/libam7xxx.git/commitdiff_plain/089ff117b6d9e50b8885d1a3d1071bad96fd1d94 am7xxx: rename am7xxx_header.unknown0 to am7xxx_header.direction This field should indicate the direction of the communication, according to the USB dumps it is 0 for outgoing packets and 1 for incoming packets. --- diff --git a/src/am7xxx.c b/src/am7xxx.c index aaab4f4..e5427ca 100644 --- a/src/am7xxx.c +++ b/src/am7xxx.c @@ -156,9 +156,13 @@ 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; @@ -214,7 +218,7 @@ 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); @@ -319,7 +323,7 @@ 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 +338,7 @@ 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 +360,13 @@ 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 +695,7 @@ 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 +800,7 @@ 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, @@ -821,7 +831,7 @@ AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode mo 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,