From 351bfbd055aae28cd545bf3513a80f266ce841a2 Mon Sep 17 00:00:00 2001
From: Pali Rohár <pali.rohar@gmail.com>
Date: Tue, 18 Nov 2014 23:24:02 +0100
Subject: mkii: Implement device initialization

---
 src/mkii.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 119 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/mkii.c b/src/mkii.c
index 81e860d..e51943b 100644
--- a/src/mkii.c
+++ b/src/mkii.c
@@ -17,25 +17,125 @@
 
 */
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <arpa/inet.h>
+
 #include "mkii.h"
 #include "global.h"
 #include "image.h"
 #include "device.h"
 #include "usb-device.h"
 
+#define MKII_PING		0x00000000
+#define MKII_GET_PROTOCOL	0x01010000
+#define MKII_TELL_PROTOCOL	0x02020000
+#define MKII_GET_DEVICE		0x01030000
+#define MKII_GET_HWREV		0x01040000
+#define MKII_GET_IMAGES		0x01050000
+#define MKII_REBOOT		0x0C060000
+#define MKII_INIT_SEND		0x03010000
+#define MKII_SEND_IMAGE		0x04020000
+
+struct mkii_message {
+	uint32_t header;
+	uint16_t size;
+	uint32_t type;
+	char data[];
+} __attribute__((__packed__));
+
+static int mkii_send_receive(usb_dev_handle * udev, uint32_t type, struct mkii_message * in_msg, size_t data_size, struct mkii_message * out_msg, size_t out_size) {
+
+	int ret;
+
+	in_msg->header = 0x8810001B;
+	in_msg->size = htons(data_size + 4);
+	in_msg->type = type;
+
+	ret = usb_bulk_write(udev, 1, (const char *)in_msg, data_size + sizeof(*in_msg), 5000);
+	if ( ret < 0 )
+		return ret;
+	if ( (size_t)ret != data_size + sizeof(*in_msg) )
+		return -1;
+
+	ret = usb_bulk_read(udev, 129, (char *)out_msg, out_size, 5000);
+	if ( ret < 0 )
+		return ret;
+
+	if ( out_msg->header != 0x8800101B )
+		return -1;
+
+	if ( out_msg->type != (type | 0x20000000) )
+		return -1;
+
+	if ( (size_t)ret < sizeof(*out_msg) )
+		return -1;
+
+	if ( ntohs(out_msg->size) != ret - sizeof(*out_msg) + 4 )
+		return -1;
+
+	return ret - sizeof(*out_msg);
+
+}
+
 int mkii_init(struct usb_device_info * dev) {
 
-	ERROR("Mk II protocol is not implemented yet");
-	(void)dev;
-	return -1;
+	char buf[2048];
+	struct mkii_message * msg;
+	enum device device;
+	int ret;
+
+	printf("Initializing Mk II protocol...\n");
+
+	msg = (struct mkii_message *)buf;
+
+	ret = mkii_send_receive(dev->udev, MKII_PING, msg, 0, msg, sizeof(buf));
+	if ( ret != 0 )
+		return -1;
+
+	memcpy(msg->data, "/update/protocol_version", sizeof("/update/protocol_version")-1);
+	ret = mkii_send_receive(dev->udev, MKII_GET_PROTOCOL, msg, sizeof("/update/protocol_version")-1, msg, sizeof(buf));
+	if ( ret != 2 || msg->data[0] != 0 || msg->data[1] != 0x32 )
+		return -1;
+
+	memcpy(msg->data, "/update/host_protocol_version\x00\x32", sizeof("/update/host_protocol_version\x00\x32")-1);
+	ret = mkii_send_receive(dev->udev, MKII_TELL_PROTOCOL, msg, sizeof("/update/host_protocol_version\x00\x32")-1, msg, sizeof(buf));
+	if ( ret != 1 || msg->data[0] != 0 )
+		return -1;
+
+	device = mkii_get_device(dev);
+
+	if ( ! dev->device )
+		dev->device = device;
+
+	if ( dev->device && device && dev->device != device ) {
+		ERROR("Device mishmash, expected %s, got %s", device_to_string(dev->device), device_to_string(device));
+		return -1;
+	}
+
+	dev->hwrev = mkii_get_hwrev(dev);
+
+	return 0;
 
 }
 
 enum device mkii_get_device(struct usb_device_info * dev) {
 
-	ERROR("Not implemented yet");
-	(void)dev;
-	return DEVICE_UNKNOWN;
+	char buf[2048];
+	struct mkii_message * msg;
+	int ret;
+
+	msg = (struct mkii_message *)buf;
+
+	memcpy(msg->data, "/device/product_code", sizeof("/device/product_code")-1);
+	ret = mkii_send_receive(dev->udev, MKII_GET_DEVICE, msg, sizeof("/device/product_code")-1, msg, sizeof(buf));
+	if ( ret < 2 || msg->data[0] != 0 || msg->data[1] == 0 )
+		return DEVICE_UNKNOWN;
+
+	msg->data[ret] = 0;
+	return device_from_string((char *)msg->data+1);
 
 }
 
@@ -128,9 +228,19 @@ int mkii_set_rd_flags(struct usb_device_info * dev, const char * flags) {
 
 int16_t mkii_get_hwrev(struct usb_device_info * dev) {
 
-	ERROR("Not implemented yet");
-	(void)dev;
-	return -1;
+	char buf[2048];
+	struct mkii_message * msg;
+	int ret;
+
+	msg = (struct mkii_message *)buf;
+
+	memcpy(msg->data, "/device/hw_build", sizeof("/device/hw_build")-1);
+	ret = mkii_send_receive(dev->udev, MKII_GET_DEVICE, msg, sizeof("/device/hw_build")-1, msg, sizeof(buf));
+	if ( ret < 2 || msg->data[0] != 0 || msg->data[1] == 0 )
+		return -1;
+
+	msg->data[ret] = 0;
+	return atoi(msg->data+1);
 
 }
 
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