hwstub: rework i2c completely

Change-Id: I1e5f87f15f0ca9586d8185316ffcaeef6d9d4d38

utils/hwstub/tools/lua/i2c_scan.lua

@@ -0,0 +1,11 @@
+I2CSCAN = {}
+
+function I2CSCAN.scan()
+    STMP.i2c.init()
+    STMP.i2c.set_speed(true)
+    for i = 2, 254, 2 do
+        if STMP.i2c.transmit(i, {}, true) then
+            print(string.format("%#x OK", i))
+        end
+    end 
+    end

utils/hwstub/tools/lua/sonynwze360.lua

@@ -150,13 +150,6 @@ end
 function NWZE360.init()
     NWZE360.lcd_init()
     NWZE360.set_backlight(100)
-    STMP.i2c.init()
-    STMP.i2c.set_speed(true)
-    for i = 2, 254, 2 do
-        if STMP.i2c.transmit(i, {}, true) then
-            print(string.format("%#x OK", i))
-        end
-    end
     --[[
     HW.LRADC.CTRL0.SFTRST.clr()
     HW.LRADC.CTRL0.CLKGATE.clr()

utils/hwstub/tools/lua/stmp/i2c.lua

@@ -8,10 +8,7 @@ h:add("The STMP.clkctrl table handles the i2c device for all STMPs.")
 
 function STMP.i2c.init()
     HW.I2C.CTRL0.SFTRST.set()
-    STMP.pinctrl.pin(0, 30).muxsel("MAIN")
+    STMP.pinctrl.i2c.setup()
-    STMP.pinctrl.pin(0, 30).pull(true)
-    STMP.pinctrl.pin(0, 31).muxsel("MAIN")
-    STMP.pinctrl.pin(0, 31).pull(true)
     STMP.i2c.reset()
     STMP.i2c.set_speed(true)
 end
@@ -21,7 +18,9 @@ function STMP.i2c.reset()
     HW.I2C.CTRL0.SFTRST.clr()
     HW.I2C.CTRL0.CLKGATE.clr()
     -- errata for IMX233
-    HW.I2C.CTRL1.ACK_MODE.set();
+    if STMP.is_imx233() then
+        HW.I2C.CTRL1.ACK_MODE.set();
+    end
 end
 
 function STMP.i2c.set_speed(fast)
@@ -63,7 +62,9 @@ function STMP.i2c.transmit(slave_addr, buffer, send_stop)
     while HW.I2C.CTRL0.RUN.read() == 1 do
     end
     if HW.I2C.CTRL1.NO_SLAVE_ACK_IRQ.read() == 1 then
-        HW.I2C.CTRL1.CLR_GOT_A_NAK.set()
+        if STMP.is_imx233() then
+            HW.I2C.CTRL1.CLR_GOT_A_NAK.set()
+        end
         STMP.i2c.reset()
         return false
     end

utils/hwstub/tools/lua/stmp/pinctrl.lua

@@ -86,6 +86,7 @@ hh:add("* pin: pin number (mandatory) ")
 hh:add("* muxsel: same values as STMP.pinctrl.pin().muxsel (optional)")
 hh:add("* enable: enable/disable output (optional)")
 hh:add("* output: set/clear output (optional)")
+hh:add("* pull: enable/disable pullup (optional)")
 hh:add("All non-subtable entries are ignored")
 hh:add("All unknown parameters in subtablkes are ignored")
 hh:add("")
@@ -112,6 +113,10 @@ function STMP.pinctrl.configure(tbl)
                     if v.output then pin.set()
                     else pin.clr() end
                 end
+                if v.pull ~= nil then
+                    STMP.debug(string.format("cfg B%dP%02d pull %s", v.bank, v.pin, v.pull))
+                    pin.pull(v.pull)
+                end
             end
         end
     end
@@ -291,3 +296,32 @@ function STMP.pinctrl.lcdif.setup_system(bus_width, busy)
         STMP.pinctrl.configure_ex(busy_pin)
     end
 end
+
+STMP.pinctrl.i2c = {}
+
+local hhh = hh:create_topic("setup")
+hhh:add("The STMP.pinctrl.i2c.setup() functions configure the I2C pins.")
+
+function STMP.pinctrl.i2c.setup()
+    local pins =
+    {
+        stmp3700 =
+        {
+            all =
+            {
+                i2c_scl = { bank = 2, pin = 5, muxsel = "MAIN", pull = true},
+                i2c_sda = { bank = 2, pin = 6, muxsel = "MAIN", pull = true}
+            }
+        },
+        imx233 =
+        {
+            all =
+            {
+                i2c_scl = { bank = 0, pin = 30, muxsel = "MAIN", pull = true},
+                i2c_sda = { bank = 0, pin = 31, muxsel = "MAIN", pull = true}
+            }
+        }
+    }
+
+    STMP.pinctrl.configure_ex(pins)
+end