History log of /netbsd-current/sys/arch/mips/ingenic/jziic.c
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# 1.9 07-Aug-2021 thorpej

Merge thorpej-cfargs2.


Revision tags: thorpej-futex2-base thorpej-cfargs2-base cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 cjep_staticlib_x-base thorpej-i2c-spi-conf-base
# 1.8 24-Apr-2021 thorpej

branches: 1.8.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).


Revision tags: thorpej-cfargs-base thorpej-futex-base bouyer-xenpvh-base2 phil-wifi-20200421 bouyer-xenpvh-base1 phil-wifi-20200411 bouyer-xenpvh-base is-mlppp-base phil-wifi-20200406 ad-namecache-base3 ad-namecache-base2 ad-namecache-base1 ad-namecache-base
# 1.7 23-Dec-2019 thorpej

branches: 1.7.10;
No need to check cold ourselves; iic_exec() does it for us.


# 1.6 22-Dec-2019 thorpej

Cleanup i2c bus acquire / release, centralizing all of the logic into
iic_acquire_bus() / iic_release_bus(). "acquire" and "release" hooks
no longer need to be provided by back-end controller drivers (only if
they need special handling, e.g. powering on the i2c controller).
This results in the removal of a bunch of rendundant code from each
back-end controller driver.

Assert that we are not in hard interrupt context in iic_acquire_bus(),
iic_exec(), and iic_release_bus().


Revision tags: netbsd-9-2-RELEASE netbsd-9-1-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 isaki-audio2-base pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906
# 1.5 03-Sep-2018 riastradh

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)


Revision tags: netbsd-8-2-RELEASE netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base tls-maxphys-base-20171202 matt-nb8-mediatek-base nick-nhusb-base-20170825 perseant-stdc-iso10646-base netbsd-8-base
# 1.4 19-May-2017 skrll

branches: 1.4.8; 1.4.10; 1.4.12;
Trailing whitespace


Revision tags: prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 jdolecek-ncq-base pgoyette-localcount-20170320 nick-nhusb-base-20170204 bouyer-socketcan-base pgoyette-localcount-20170107 nick-nhusb-base-20161204 pgoyette-localcount-20161104 nick-nhusb-base-20161004 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base nick-nhusb-base-20160907 nick-nhusb-base-20160529 nick-nhusb-base-20160422 nick-nhusb-base-20160319 nick-nhusb-base-20151226
# 1.3 14-Dec-2015 macallan

zero out struct i2cbus_attach_args before messing with it


Revision tags: nick-nhusb-base-20150921 nick-nhusb-base-20150606
# 1.2 21-Apr-2015 macallan

support interrupt-driven transfers


Revision tags: nick-nhusb-base-20150406
# 1.1 04-Apr-2015 macallan

branches: 1.1.2;
preliminary driver for JZ4780's on-chip SMBus controllers
needs more work but it's good enough for talking to an RTC


# 1.8 24-Apr-2021 thorpej

Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).


Revision tags: thorpej-cfargs-base thorpej-futex-base bouyer-xenpvh-base2 phil-wifi-20200421 bouyer-xenpvh-base1 phil-wifi-20200411 bouyer-xenpvh-base is-mlppp-base phil-wifi-20200406 ad-namecache-base3 ad-namecache-base2 ad-namecache-base1 ad-namecache-base
# 1.7 23-Dec-2019 thorpej

branches: 1.7.10;
No need to check cold ourselves; iic_exec() does it for us.


# 1.6 22-Dec-2019 thorpej

Cleanup i2c bus acquire / release, centralizing all of the logic into
iic_acquire_bus() / iic_release_bus(). "acquire" and "release" hooks
no longer need to be provided by back-end controller drivers (only if
they need special handling, e.g. powering on the i2c controller).
This results in the removal of a bunch of rendundant code from each
back-end controller driver.

Assert that we are not in hard interrupt context in iic_acquire_bus(),
iic_exec(), and iic_release_bus().


Revision tags: netbsd-9-1-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 isaki-audio2-base pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906
# 1.5 03-Sep-2018 riastradh

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)


Revision tags: netbsd-8-2-RELEASE netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base tls-maxphys-base-20171202 matt-nb8-mediatek-base nick-nhusb-base-20170825 perseant-stdc-iso10646-base netbsd-8-base
# 1.4 19-May-2017 skrll

branches: 1.4.8; 1.4.10; 1.4.12;
Trailing whitespace


Revision tags: prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 jdolecek-ncq-base pgoyette-localcount-20170320 nick-nhusb-base-20170204 bouyer-socketcan-base pgoyette-localcount-20170107 nick-nhusb-base-20161204 pgoyette-localcount-20161104 nick-nhusb-base-20161004 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base nick-nhusb-base-20160907 nick-nhusb-base-20160529 nick-nhusb-base-20160422 nick-nhusb-base-20160319 nick-nhusb-base-20151226
# 1.3 14-Dec-2015 macallan

zero out struct i2cbus_attach_args before messing with it


Revision tags: nick-nhusb-base-20150921 nick-nhusb-base-20150606
# 1.2 21-Apr-2015 macallan

support interrupt-driven transfers


Revision tags: nick-nhusb-base-20150406
# 1.1 04-Apr-2015 macallan

branches: 1.1.2;
preliminary driver for JZ4780's on-chip SMBus controllers
needs more work but it's good enough for talking to an RTC


# 1.7 23-Dec-2019 thorpej

No need to check cold ourselves; iic_exec() does it for us.


# 1.6 22-Dec-2019 thorpej

Cleanup i2c bus acquire / release, centralizing all of the logic into
iic_acquire_bus() / iic_release_bus(). "acquire" and "release" hooks
no longer need to be provided by back-end controller drivers (only if
they need special handling, e.g. powering on the i2c controller).
This results in the removal of a bunch of rendundant code from each
back-end controller driver.

Assert that we are not in hard interrupt context in iic_acquire_bus(),
iic_exec(), and iic_release_bus().


Revision tags: netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 isaki-audio2-base pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906
# 1.5 03-Sep-2018 riastradh

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)


Revision tags: netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base tls-maxphys-base-20171202 matt-nb8-mediatek-base nick-nhusb-base-20170825 perseant-stdc-iso10646-base netbsd-8-base
# 1.4 19-May-2017 skrll

branches: 1.4.8; 1.4.10; 1.4.12;
Trailing whitespace


Revision tags: prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 jdolecek-ncq-base pgoyette-localcount-20170320 nick-nhusb-base-20170204 bouyer-socketcan-base pgoyette-localcount-20170107 nick-nhusb-base-20161204 pgoyette-localcount-20161104 nick-nhusb-base-20161004 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base nick-nhusb-base-20160907 nick-nhusb-base-20160529 nick-nhusb-base-20160422 nick-nhusb-base-20160319 nick-nhusb-base-20151226
# 1.3 14-Dec-2015 macallan

zero out struct i2cbus_attach_args before messing with it


Revision tags: nick-nhusb-base-20150921 nick-nhusb-base-20150606
# 1.2 21-Apr-2015 macallan

support interrupt-driven transfers


Revision tags: nick-nhusb-base-20150406
# 1.1 04-Apr-2015 macallan

branches: 1.1.2;
preliminary driver for JZ4780's on-chip SMBus controllers
needs more work but it's good enough for talking to an RTC


Revision tags: isaki-audio2-base pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906
# 1.5 03-Sep-2018 riastradh

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)


Revision tags: pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base tls-maxphys-base-20171202 matt-nb8-mediatek-base nick-nhusb-base-20170825 perseant-stdc-iso10646-base netbsd-8-base
# 1.4 19-May-2017 skrll

branches: 1.4.8; 1.4.10;
Trailing whitespace


Revision tags: prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 jdolecek-ncq-base pgoyette-localcount-20170320 nick-nhusb-base-20170204 bouyer-socketcan-base pgoyette-localcount-20170107 nick-nhusb-base-20161204 pgoyette-localcount-20161104 nick-nhusb-base-20161004 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base nick-nhusb-base-20160907 nick-nhusb-base-20160529 nick-nhusb-base-20160422 nick-nhusb-base-20160319 nick-nhusb-base-20151226
# 1.3 14-Dec-2015 macallan

zero out struct i2cbus_attach_args before messing with it


Revision tags: nick-nhusb-base-20150921 nick-nhusb-base-20150606
# 1.2 21-Apr-2015 macallan

support interrupt-driven transfers


Revision tags: nick-nhusb-base-20150406
# 1.1 04-Apr-2015 macallan

branches: 1.1.2;
preliminary driver for JZ4780's on-chip SMBus controllers
needs more work but it's good enough for talking to an RTC


# 1.4 19-May-2017 skrll

Trailing whitespace


Revision tags: prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 jdolecek-ncq-base pgoyette-localcount-20170320 nick-nhusb-base-20170204 bouyer-socketcan-base pgoyette-localcount-20170107 nick-nhusb-base-20161204 pgoyette-localcount-20161104 nick-nhusb-base-20161004 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base nick-nhusb-base-20160907 nick-nhusb-base-20160529 nick-nhusb-base-20160422 nick-nhusb-base-20160319 nick-nhusb-base-20151226
# 1.3 14-Dec-2015 macallan

zero out struct i2cbus_attach_args before messing with it


Revision tags: nick-nhusb-base-20150921 nick-nhusb-base-20150606
# 1.2 21-Apr-2015 macallan

support interrupt-driven transfers


Revision tags: nick-nhusb-base-20150406
# 1.1 04-Apr-2015 macallan

branches: 1.1.2;
preliminary driver for JZ4780's on-chip SMBus controllers
needs more work but it's good enough for talking to an RTC


Revision tags: nick-nhusb-base-20161204 pgoyette-localcount-20161104 nick-nhusb-base-20161004 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base nick-nhusb-base-20160907 nick-nhusb-base-20160529 nick-nhusb-base-20160422 nick-nhusb-base-20160319 nick-nhusb-base-20151226
# 1.3 14-Dec-2015 macallan

zero out struct i2cbus_attach_args before messing with it


Revision tags: nick-nhusb-base-20150921 nick-nhusb-base-20150606
# 1.2 21-Apr-2015 macallan

support interrupt-driven transfers


Revision tags: nick-nhusb-base-20150406
# 1.1 04-Apr-2015 macallan

branches: 1.1.2;
preliminary driver for JZ4780's on-chip SMBus controllers
needs more work but it's good enough for talking to an RTC