Editing N900 Hardware Bus I2c

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[[:wikipedia:I2C|I2C]] is a simple serial bus, used in many devices.
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=Hardware=
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==Hardware==
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Bus 1.
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* 0x48 [[N900 Hardware Chipset|Gaia/chipset]]
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dummy/1-004a
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dummy/1-0049
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dummy/1-004b
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===Bus 1===
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Bus 2.
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* 0x48 0x49 0x4a 0x4b [[N900 Hardware Chipset|Gaia/chipset]]
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===Bus 2===
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tsl2563/2-0029
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* 0x18 0x19 [[N900 Hardware Audio Codec|Audio codec]]
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smia-sensor/2-0010
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* 0x29 [[N900 light meter]]
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aic3x I2C Codec/2-0018
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* 0x30 [[N900 Hardware Flash Torch]]
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aic34b_dummy/2-0019   
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* 0x30 [[N900 Hardware LED Flash Torch]]
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* 0x63 [[N900 Hardware FM Retriever|FM receiver]]
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tpa6130a2/2-0060
* 0x32 [[N900 Hardware LED]]
* 0x32 [[N900 Hardware LED]]
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* 0x60 [[N900 headphone amplifier]]
 
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* 0x63 [[N900 FM radio transmitter|FM radio transmitter]]
 
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* 0x55 [[N900 Hardware Charge Meter]]
 
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* 0x6B [[N900 Hardware Battery Charger]]
 
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* 0x10 [[N900 Front camera|Front VGA Camera (control)]]
 
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===Bus 3===
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Bus 3.
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* 0x0c [[N900 Hardware Autofocus|Lens focus ]]
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* 0x1d [[N900 accelerometer|Accelerometer]]
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* 0x22 [[N900 FM radio receiver|FM Receiver]]
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* 0x3e [[N900 camera sensor|Main Camera (control)]]
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===Bus ?===
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* 0x0c [[N900 Hardware Autofocus|Lens focus control]]
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* 0x? [[N900 Hardware GPS|GPS]]
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* 0x3e [[N900 Hardware Camera Sensor|Front Camera (control)]]
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edit: GPS is connected to RAPUYAMA and available to application processor only via libisi / cellmo-proxy
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* 0x1d [[N900 Hardware Accelerometer|Accelerometer]]
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==Software==
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/sys/bus/i2c/drivers# ls -d */*-*
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The [[Nokia N900|N900]] software driving I2C comes in three flavors.
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=Software=
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The n900 software driving I2C comes in three flavours.
Firstly, there are a large number of kernel drivers.
Firstly, there are a large number of kernel drivers.
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Then, there are a small number of devices 'bit banged' through I2C ioctls - BME for example does this with the [[N900 Hardware Charge Meter|charge meter]] and [[N900 Hardware Battery Charger|battery charger]].
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Then, there are a small number of devices 'bit banged' through I2C ioctls - BME for example does this.
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Finally, there are probably some I2C components in the Rapuyama and assorted cellphone/GPS hardware. These are not visible to the casual developer.
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(you have to open the n900 and probe stuff, or hack the phone firmware).
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Finally, there are probably some I2C components in the Rapuyama and assorted cellphone/GPS hardware. These are not visible to the casual developer. (you have to open the N900 and probe stuff, or hack the phone firmware).
 
[[Category:N900 Hardware]]
[[Category:N900 Hardware]]

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