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Diffstat (limited to 'Documentation/fb/metronomefb.txt')
| -rw-r--r-- | Documentation/fb/metronomefb.txt | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/Documentation/fb/metronomefb.txt b/Documentation/fb/metronomefb.txt index b9a2e7b7e838..237ca412582d 100644 --- a/Documentation/fb/metronomefb.txt +++ b/Documentation/fb/metronomefb.txt | |||
| @@ -1,7 +1,7 @@ | |||
| 1 | Metronomefb | 1 | Metronomefb |
| 2 | ----------- | 2 | ----------- |
| 3 | Maintained by Jaya Kumar <jayakumar.lkml.gmail.com> | 3 | Maintained by Jaya Kumar <jayakumar.lkml.gmail.com> |
| 4 | Last revised: Nov 20, 2007 | 4 | Last revised: Mar 10, 2008 |
| 5 | 5 | ||
| 6 | Metronomefb is a driver for the Metronome display controller. The controller | 6 | Metronomefb is a driver for the Metronome display controller. The controller |
| 7 | is from E-Ink Corporation. It is intended to be used to drive the E-Ink | 7 | is from E-Ink Corporation. It is intended to be used to drive the E-Ink |
| @@ -11,20 +11,18 @@ display media here http://www.e-ink.com/products/matrix/metronome.html . | |||
| 11 | Metronome is interfaced to the host CPU through the AMLCD interface. The | 11 | Metronome is interfaced to the host CPU through the AMLCD interface. The |
| 12 | host CPU generates the control information and the image in a framebuffer | 12 | host CPU generates the control information and the image in a framebuffer |
| 13 | which is then delivered to the AMLCD interface by a host specific method. | 13 | which is then delivered to the AMLCD interface by a host specific method. |
| 14 | Currently, that's implemented for the PXA's LCDC controller. The display and | 14 | The display and error status are each pulled through individual GPIOs. |
| 15 | error status are each pulled through individual GPIOs. | ||
| 16 | 15 | ||
| 17 | Metronomefb was written for the PXA255/gumstix/lyre combination and | 16 | Metronomefb is platform independent and depends on a board specific driver |
| 18 | therefore currently has board set specific code in it. If other boards based on | 17 | to do all physical IO work. Currently, an example is implemented for the |
| 19 | other architectures are available, then the host specific code can be separated | 18 | PXA board used in the AM-200 EPD devkit. This example is am200epd.c |
| 20 | and abstracted out. | ||
| 21 | 19 | ||
| 22 | Metronomefb requires waveform information which is delivered via the AMLCD | 20 | Metronomefb requires waveform information which is delivered via the AMLCD |
| 23 | interface to the metronome controller. The waveform information is expected to | 21 | interface to the metronome controller. The waveform information is expected to |
| 24 | be delivered from userspace via the firmware class interface. The waveform file | 22 | be delivered from userspace via the firmware class interface. The waveform file |
| 25 | can be compressed as long as your udev or hotplug script is aware of the need | 23 | can be compressed as long as your udev or hotplug script is aware of the need |
| 26 | to uncompress it before delivering it. metronomefb will ask for waveform.wbf | 24 | to uncompress it before delivering it. metronomefb will ask for metronome.wbf |
| 27 | which would typically go into /lib/firmware/waveform.wbf depending on your | 25 | which would typically go into /lib/firmware/metronome.wbf depending on your |
| 28 | udev/hotplug setup. I have only tested with a single waveform file which was | 26 | udev/hotplug setup. I have only tested with a single waveform file which was |
| 29 | originally labeled 23P01201_60_WT0107_MTC. I do not know what it stands for. | 27 | originally labeled 23P01201_60_WT0107_MTC. I do not know what it stands for. |
| 30 | Caution should be exercised when manipulating the waveform as there may be | 28 | Caution should be exercised when manipulating the waveform as there may be |