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path: root/include/hw/i2c/ppc4xx_i2c.h
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2018-12-12i2c: Move typedef of bitbang_i2c_interface to i2c.hBALATON Zoltan
Clang 3.4 considers duplicate typedef in ppc4xx_i2c.h and bitbang_i2c.h an error even if they are identical. Move it to a common place to allow building with this clang version. Reported-by: Thomas Huth <thuth@redhat.com> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Acked-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-07-03ppc4xx_i2c: Rewrite to model hardware more closelyBALATON Zoltan
Rewrite to make it closer to how real device works so that guest OS drivers can access I2C devices. Previously this was only a hack to allow U-Boot to get past accessing SPD EEPROMs but to support other I2C devices and allow guests to access them we need to model real device more properly. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-06-21ppc4xx_i2c: Implement directcntl registerBALATON Zoltan
As well as being able to generate its own i2c transactions, the ppc4xx i2c controller has a DIRECTCNTL register which allows explicit control of the i2c lines. Using this register an OS can directly bitbang i2c operations. In order to let emulated i2c devices respond to this, we need to wire up the DIRECTCNTL register to qemu's bitbanged i2c handling code. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-06-21ppc4xx_i2c: Remove unimplemented sdata and intr registersBALATON Zoltan
We don't emulate slave mode so related registers are not needed. [lh]sadr are only retained to avoid too many warnings and simplify debugging but sdata is not even correct because device has a 4 byte FIFO instead so just remove this unimplemented register for now. The intr register is also not implemented correctly, it is for diagnostics and normally not even visible on device without explicitly enabling it. As no guests are known to need this remove it as well. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-01-10ppc4xx_i2c: Implement basic I2C functionsBALATON Zoltan
Enough to please U-Boot and make it able to detect SDRAM SPD EEPROMs Signed-off-by: François Revol <revol@free.fr> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2017-12-18hw: remove "qemu/osdep.h" from header filesPhilippe Mathieu-Daudé
applied using ./scripts/clean-includes Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Corey Minyard <cminyard@mvista.com> Tested-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-09-08ppc4xx_i2c: QOMifyBALATON Zoltan
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>