From f9cb5de58020936812653c578c79c79a13bc626c Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Thu, 13 Jun 2013 02:12:01 +0200
Subject: hwstub: introduce lua code for the STMP and Creative ZEN V/Mozaic

Change-Id: Ice5f509a2e0d2114436d4760f338b9203ef96691
---
 utils/hwstub/tools/lua/stmp/lcdif.lua | 100 ++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 utils/hwstub/tools/lua/stmp/lcdif.lua

(limited to 'utils/hwstub/tools/lua/stmp/lcdif.lua')

diff --git a/utils/hwstub/tools/lua/stmp/lcdif.lua b/utils/hwstub/tools/lua/stmp/lcdif.lua
new file mode 100644
index 0000000000..0878cb1139
--- /dev/null
+++ b/utils/hwstub/tools/lua/stmp/lcdif.lua
@@ -0,0 +1,100 @@
+--
+-- LCDIF
+-- 
+
+STMP.lcdif = {}
+
+function STMP.lcdif.init()
+    HW.LCDIF.CTRL.SFTRST.set()
+    HW.LCDIF.CTRL.SFTRST.clr()
+    HW.LCDIF.CTRL.CLKGATE.clr()
+end
+
+function STMP.lcdif.set_system_timing(data_setup, data_hold, cmd_setup, cmd_hold)
+    HW.LCDIF.TIMING.CMD_HOLD.write(cmd_hold)
+    HW.LCDIF.TIMING.CMD_SETUP.write(cmd_setup)
+    HW.LCDIF.TIMING.DATA_HOLD.write(data_hold)
+    HW.LCDIF.TIMING.DATA_SETUP.write(data_setup)
+end
+
+function STMP.lcdif.set_byte_packing_format(val)
+    HW.LCDIF.CTRL1.BYTE_PACKING_FORMAT.write(val)
+end
+
+function STMP.lcdif.set_reset(val)
+    if STMP.is_stmp3600() then
+        HW.LCDIF.CTRL.RESET.write(val)
+    else
+        HW.LCDIF.CTRL1.RESET.write(val)
+    end
+end
+
+function STMP.lcdif.set_word_length(bus_width)
+    if STMP.is_stmp3600() or STMP.is_stmp3700() then
+        if bus_width == 8 then
+            HW.LCDIF.CTRL.WORD_LENGTH.set()
+        else
+            HW.LCDIF.CTRL.WORD_LENGTH.clr()
+        end
+    else
+        error("STMP.lcdif.set_word_length: unimplemented")
+    end
+end
+
+function STMP.lcdif.get_word_length()
+    if STMP.is_stmp3600() or STMP.is_stmp3700() then
+        if HW.LCDIF.CTRL.WORD_LENGTH.read() == 1 then
+            return 8
+        else
+            return 16
+        end
+    else
+        error("STMP.lcdif.get_word_length: unimplemented")
+    end
+end
+
+function STMP.lcdif.set_data_swizzle(swizzle)
+    local v = swizzle
+    if type(swizzle) == "string" then
+        if swizzle == "NONE" then
+            v = 0
+        else
+            error("unimplemented")
+        end
+    end
+    HW.LCDIF.CTRL.DATA_SWIZZLE.write(v)
+end
+
+function STMP.lcdif.is_busy()
+    if STMP.is_stmp3600() then
+        return HW.LCDIF.CTRL.FIFO_STATUS.read() == 0
+    else
+        return HW.LCDIF.STAT.TXFIFO_FULL.read() == 1
+    end
+end
+
+function STMP.lcdif.send_pio(data_mode, data)
+    local wl = STMP.lcdif.get_word_length()
+    if data_mode then
+        HW.LCDIF.CTRL.DATA_SELECT.set()
+    else
+        HW.LCDIF.CTRL.DATA_SELECT.clr()
+    end
+    STMP.debug(string.format("lcdif: count = %d", #data))
+    HW.LCDIF.CTRL.RUN.clr()
+    HW.LCDIF.CTRL.COUNT.write(#data)
+    HW.LCDIF.CTRL.RUN.set()
+    local i = 1
+    while i <= #data do
+        local v = 0
+        local v_size = 0
+        while i <= #data and v_size + wl <= 32 do
+            v = bit32.bor(v, bit32.lshift(data[i], v_size))
+            v_size = v_size + wl
+            i = i + 1
+        end
+        STMP.debug(string.format("lcdif: i=%d send 0x%x", i, v))
+        while STMP.lcdif.is_busy() do STMP.debug("lcdif: fifo full") end
+        HW.LCDIF.DATA.write(v)
+    end
+end
\ No newline at end of file
-- 
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