Add support for HiSource K0402WS-V3.0.

[TylerDurden-23]

As discussed in #86.

The magic number LED approach is taken from #44 and can be reused there.

[logicog]

Could you give PR #107 a try regarding the LED configuration? I see that the LED-pads are configured very differently, but the logical side, i.e. the led-sets and the led-ids could already be adapted. This then allows to assign different functions to the LEDs.

I will have to look into what to do about the LED-pads, which is the hardware configuration side, whereas the ledids/ledsets are the logic for the ASIC...

[logicog]

I had thought, that maybe the values for RTL837X_REG_LED_GLB_MUX_1, RTL837X_REG_LED_GLB_MUX_2... were just default values from your version of the SoC, because there is no way these can be configured using at least the GPL-dumped SDK. Now, looking into your dumped flash, I see a routine which sets meticulously one LED-pad after the other using the rtl8373_setAsicRegBits function. So this is for real. The next problem is, there is no documentation for these settings...

I will look how to set this up in machine.c.

[TylerDurden-23]

@logicog I tried the PR - and as expected it is not working correctly. I can only get 4 of the needed 12 needed LEDs working.

[logicog]

Did you add the correct numbers for the LED-pad values in a "magic" configuration routine, or are already the LED-sets wrong? In the discussion for PR #107 it seems we may configure just the LED-sets with the de-magiced setup, but keep unstructured values for the LED-pads. But I am also working on configuring those via a mapping table pad <-> LED.

[TylerDurden-23]

@logicog A "combined" approach seems to work - I can strip down the magic number function to:

	REG_SET(RTL837X_REG_LED_GLB_MUX_1, 0x08144040);
	REG_SET(RTL837X_REG_LED_GLB_MUX_2, 0x1037f309);
	REG_SET(RTL837X_REG_LED_GLB_MUX_3, 0x12454391);
	REG_SET(RTL837X_REG_LED_GLB_MUX_4, 0x19616555);
	REG_SET(RTL837X_REG_LED_GLB_MUX_5, 0x1c79d65a);
	REG_SET(RTL837X_REG_LED_GLB_MUX_6, 0x0002181d);

Plus run your new configuration, and I get a functional though not totally identical led signaling.

[logicog]

You should be able to replace even the REG_SET(RTL837X_REG_LED_GLB_MUX_1-6, xy); with the correct setting for you device:

.led_mux_custom = 1,
	.led_mux = { 0x00, 0x01, 0x...},

6 bits of the LED_GLB_MUX registers give one of the entries in the .led_mux list. You can get them by configuring these register using the magic numbers during boot, and then printing them out once via leds_dump() and then putting the printed out list into .led_mux. Then you no longer need the magic numbers. Possibly with the exception of RTL837X_REG_LED_GLB_ACTIVE.