[eureka]

@dave2008, I've compiled KPV with KT support from your repo (commit cc38d9e6) and run it with

/mnt/us/kindlepdfviewver/kpdf.sh /mnt/us/documents

Some patching was required:

Spoiler:

This patch is in public domain.

diff --git a/frontend/ui/device.lua b/frontend/ui/device.lua
index 915b604..454453a 100644
--- a/frontend/ui/device.lua
+++ b/frontend/ui/device.lua
@@ -67,7 +67,7 @@ end
 
 function Device:isTouchDevice()
 	local model = self:getModel()
-	return (model == "Kindle4") or (model == "KindlePaperWhite") or util.isEmulated()
+	return (model == "Kindle4") or (model == "KindlePaperWhite") or (model == "KindleTouch") or util.isEmulated()
 end
 
 function Device:intoScreenSaver()
diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index efd2a58..a7b52f5 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -239,16 +239,20 @@ function Input:init()
 	else
 		input.open("fake_events")
 		local dev_mod = Device:getModel()
-		-- open event0 for all models
-		input.open("/dev/input/event0")
-		if dev_mod ~= "KindlePaperWhite" then
-			-- we don't have event1 in KindlePaperWhite
+		if dev_mod ~= "KindleTouch" then
+			-- event0 in KindleTouch is "WM8962 Beep Generator" (useless)
+			input.open("/dev/input/event0")
+		end
+		if dev_mod ~= "KindleTouch" and dev_mod ~= "KindlePaperWhite" then
+			-- event1 in KindleTouch is "imx-yoshi Headset" (useless)
+			-- and we don't have event1 in KindlePaperWhite
 			input.open("/dev/input/event1")
-		elseif dev_mod == "KindlePaperWhite" then
+		end
+		if dev_mod == "KindlePaperWhite" then
 			print("Auto-detected Kindle PaperWhite")
 		elseif dev_mod == "KindleTouch" then
-			input.open("/dev/input/event2")
-			input.open("/dev/input/event3")
+			input.open("/dev/input/event2") -- Home button
+			input.open("/dev/input/event3") -- touchscreen
 			print("Auto-detected Kindle Touch")
 		elseif dev_mod == "Kindle4" then
 			print("Auto-detected Kindle 4")

With this patch input events are intercepted and recognized (taps are taps with handler "onGesture", Home button is ["key"] = "Home" with handler "onKeyPress").

But, unfortunately, KPV interface isn't displayed on screen at all.

Here is my eips -i:

Spoiler:

[root@kindle kindlepdfviewer]# eips -i

Fixed framebuffer info
    id:              mxc_epdc_fb    smem_start:       0x75400000
    smem_len:            2179072    type:          PACKED_PIXELS
    type_aux:                  0    visual:   STATIC_PSEUDOCOLOR
    xpanstep:                  1    ypanstep:                  1
    ywrapstep:                 0    line_length:             608
    mmio_start:       0x00000000    mmio_len:                  0
    accel:                     0

Variable framebuffer info
    xres:                    600    yres:                    800
    xres_virtual:            608    yres_virtual:           3584
    xoffset:                   0    yoffset:                   0
    bits_per_pixel:            8    grayscale:                 1
    red.offset:                0    green.offset:              0
    red.length:                8    green.length:              8
    red.msb_right:             0    green.msb_right:           0
    blue.offset:               0    transp.offset:             0
    blue.length:               8    transp.length:             0
    blue.msb_right:            0    transp.msb_right:          0
    nonstd:                    0    activate:                128
    width:                    -1    height:                   -1
    accel_flags:               0    pixclock:           32000000
    left_margin:              17    right_margin:            172
    upper_margin:              4    lower_margin:             18
    hsync_len:                15    vsync_len:                 4
    sync:                      0    vmode:                     0
    rotate:                    1

EDIT: I have Kindle Tocuh 5.1.2
EDIT2: Output of strace eips '' has ioctl(3, 0x4048462e, 0xbed0baf8) = 0.

EDIT3: It works. So:

• einkfb.c should be updated. Kindle Touch has 8-bit framebuffer and 800x600 screen, but it requires kindlePWeinkUpdate(), not the kindle4einkUpdate()
• tap coordinates (both X and Y) reported by touchscreen input device have range 0-4095, so they should be adjusted to screen resolution (so that X will be in range 0-600 and Y will be in range 0-800).