hwstub: add Shanling M2 IPL/SPL dumping code

Change-Id: I14987d9783dd371f4990a5bcfbfb2d1c0c9be213

utils/hwstub/tools/lua/shanlingm2.lua

@@ -0,0 +1,50 @@
+--
+-- Shangling M2
+--
+M2 = {}
+
+-- call with nil to get automatic name
+function M2.dump_ipl(file)
+    if file == nil then
+        file = "shangling_m2_ipl.bin"
+    end
+    print("Dumping IPL to " .. file .." ...")
+    JZ.nand.rom.init()
+    JZ.nand.rom.read_flags()
+    local ipl = JZ.nand.rom.read_bootloader()
+    JZ.nand.rom.write_to_file(file, ipl)
+end
+
+-- call with nil to get automatic name
+function M2.dump_spl(file)
+    if file == nil then
+        file = "shangling_m2_spl.bin"
+    end
+    print("Dumping SPL to " .. file .." ...")
+    -- hardcoded parameters are specific to the Shangling M2
+    local nand_params = {
+        bus_width = 16,
+        row_cycle = 3,
+        col_cycle = 2,
+        page_size = 2048,
+        page_per_block = 64,
+        oob_size = 128,
+        badblock_pos = 0,
+        badblock_page = 0,
+        ecc_pos = 4,
+        ecc_size = 13,
+        ecc_level = 8,
+        addr_setup_time = 4,
+        addr_hold_time = 4,
+        write_strobe_time = 4,
+        read_strobe_time = 4,
+        recovery_time = 13,
+    }
+    local spl = JZ.nand.rom.read_spl(nand_params, 0x400, 0x200)
+    JZ.nand.rom.write_to_file(file, spl)
+end
+
+function M2.dump()
+    M2.dump_ipl(nil)
+    M2.dump_spl(nil)
+end