Merge thorpej-cfargs2.

branches: 1.20.8;
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?).

branches: 1.19.8; 1.19.26;
Trailing whitespace

add a driver for the chip's EFUSE interface, use it to find the MAC address
for the onboard ethernet controller

add driver for jz4780 random number generator
From Michael McConville

- get rid of private bus space in ingenic_com.c
- move com to apbus
- attach the other UARTs

pass the appropriate clock register to devices so different instances of the
same driver don't have to guess
also wire the ddc2 part to iic4 for now so we can see the monitor

- fix pclk calculation
- report CPU clock
- pass mclk to child devices
- wire up pins for MSC / sdmmc

add entries for sdmmc hosts, no driver yet

enable clocks as needed

branches: 1.11.2;
- determine bus clock, pass it to devices
- more clock enabling / gpio setup

spin up SMBus clocks before attaching drivers
TODO: only enable clocks for drivers that actually attach

always print the child devices' address, print irq if not -1 and a driver
is actually attaching

- keep a list of devices, addresses and interrupts in apbus.c
- pass irq numbers to devices
- reduce magic numbers in device drivers
- allow multiple instances of device drivers

moar devices

restrict DMA buffers to the lower 256MB -> now dwc2 DMA works

un-gate yet another clock

appease nick

wake up the USB ports before attaching dwctwo
now it finds a root hub

use defflag-ed debug options
enable USB clocks before attaching dwctwo

peripheral bus, not really tested

Add a convenience function, com_init_regs_stride(), that shifts the register
offsets and size by the specified amount. Use in front-ends as appropriate.

Remove the COM_REGMAP option -- just use it all the time. While here,
garbage-collect the COM_FUNCMAP and COM_AU1X00 options, as there are
not used anywhere.

Clean up initialization of com_regs structure, in preparation for
some additional changers.

branches: 1.6.8; 1.6.10; 1.6.12;
Trailing whitespace

- get rid of private bus space in ingenic_com.c
- move com to apbus
- attach the other UARTs

fix uart parameters, now speed setting actually works

establish interrupt

sprinkle static

branches: 1.1.2;
initial support for CI20 / Ingenic JZ4780
not much there yet, it loads, attaches a serial port and you can drop into
ddb

branches: 1.1.6; 1.1.10;
Provide and use some CP0 accessor functions instead of M[TF]C0 macros
for readability.

While here convert some other M[TF]C0 uses to already exising accessor
functions, e.g. mipsNN_cp0_ebase_read

Add a shared function to query the common properties used for configuring
an Ethernet address.

add miivar.h and put a stop gap to compile.

branches: 1.3.8; 1.3.12;
Trailing whitespace

use the MAC address passed as a property if available instead of relying on
u-boot to program it into the chip for us ( which it may not do if we're not
netbooting )

branches: 1.1.2;
support CI20's onboard Ethernet controller

Merge thorpej-cfargs2.

branches: 1.14.8;
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?).

branches: 1.13.16; 1.13.34;
Merge nick-nhusb

- API / infrastructure changes to support memory management changes.
- Memory management improvements and bug fixes.
- HCDs should now be MP safe
- conversion to KERNHIST based debug
- FS/LS isoc support on ehci(4).
- conversion to kmem(9)
- Some USB 3 support - mostly from Takahiro HAYASHI (t-hash).
- interrupt transfers now get proper DMA operations
- general bug fixes
- kern/48308
- uhub status notification improvements
- umass(4) probe fix (applied to HEAD already)
- ohci(4) short transfer fix

Update for latest dwc2

explicitly un-suspend the OTG port after PHY reset

'USB' -> 'USB OTG' to distinguish this one from the other USB hosts

branches: 1.9.2;
set root hub vendor IDs

- keep a list of devices, addresses and interrupts in apbus.c
- pass irq numbers to devices
- reduce magic numbers in device drivers
- allow multiple instances of device drivers

flash the LED to show we're doing something
( and as a side effect make sure the USB PHY is powered up )

magic number reduction

restrict DMA buffers to the lower 256MB -> now dwc2 DMA works

- use the same parameter block as the linux driver, only with DMA disabled
- reset the chip before handing it to dwc2/
now it actually detects some devices

appease nick

establish interrupt
do some PHY setup, now the hardware actually responds

dwc2 attachment, doesn't do much yet

branches: 1.3.2; 1.3.18;
add some comments

fix build with INGENIC_DEBUG

add a driver for the chip's EFUSE interface, use it to find the MAC address
for the onboard ethernet controller

Merge thorpej-cfargs2.

branches: 1.7.8;
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?).

branches: 1.6.16;
Stop potential misuse of vendor names and USB vendor IDs in root hub
device and string descriptors.

Firstly: Few vendors have identical PCI-SIG vendor IDs and USB-IF vendor
IDs. As such, using the PCI vendor ID as a USB vendor ID may trample
on whomever is allocated that USB vendor ID.

Secondly: The vendor of the host controller hardware implementation has
little to nothing to do with our usbroothub implementation. Thus we
should not potentially associate any problems therewith to such third
party.

This change will result in root hubs being identified by USB Vendor ID
0x0000. Root hub vendor string will now be "NetBSD" (or, specifically:
ostype). Product ID (0x0000) and product strings remain unchanged.

branches: 1.5.16; 1.5.18;
Merge nick-nhusb

- API / infrastructure changes to support memory management changes.
- Memory management improvements and bug fixes.
- HCDs should now be MP safe
- conversion to KERNHIST based debug
- FS/LS isoc support on ehci(4).
- conversion to kmem(9)
- Some USB 3 support - mostly from Takahiro HAYASHI (t-hash).
- interrupt transfers now get proper DMA operations
- general bug fixes
- kern/48308
- uhub status notification improvements
- umass(4) probe fix (applied to HEAD already)
- ohci(4) short transfer fix

properly initialize the EHCI
from Alexander Kabaev ( kan at freebsd.org )

branches: 1.3.2;
set root hub vendor IDs

- keep a list of devices, addresses and interrupts in apbus.c
- pass irq numbers to devices
- reduce magic numbers in device drivers
- allow multiple instances of device drivers

drivers for on-chip ohci and ehci
ohci works fine, ehci doesn't like high speed devices

Merge thorpej-cfargs2.

branches: 1.6.8;
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?).

branches: 1.5.16;
Stop potential misuse of vendor names and USB vendor IDs in root hub
device and string descriptors.

Firstly: Few vendors have identical PCI-SIG vendor IDs and USB-IF vendor
IDs. As such, using the PCI vendor ID as a USB vendor ID may trample
on whomever is allocated that USB vendor ID.

Secondly: The vendor of the host controller hardware implementation has
little to nothing to do with our usbroothub implementation. Thus we
should not potentially associate any problems therewith to such third
party.

This change will result in root hubs being identified by USB Vendor ID
0x0000. Root hub vendor string will now be "NetBSD" (or, specifically:
ostype). Product ID (0x0000) and product strings remain unchanged.

branches: 1.4.16; 1.4.18;
Merge nick-nhusb

- API / infrastructure changes to support memory management changes.
- Memory management improvements and bug fixes.
- HCDs should now be MP safe
- conversion to KERNHIST based debug
- FS/LS isoc support on ehci(4).
- conversion to kmem(9)
- Some USB 3 support - mostly from Takahiro HAYASHI (t-hash).
- interrupt transfers now get proper DMA operations
- general bug fixes
- kern/48308
- uhub status notification improvements
- umass(4) probe fix (applied to HEAD already)
- ohci(4) short transfer fix

branches: 1.3.2;
set root hub vendor IDs

- keep a list of devices, addresses and interrupts in apbus.c
- pass irq numbers to devices
- reduce magic numbers in device drivers
- allow multiple instances of device drivers

drivers for on-chip ohci and ehci
ohci works fine, ehci doesn't like high speed devices

s/maks/mask/ in comment.

branches: 1.27.10;
s/occured/occurred/ in comments, log messages and man pages.

Type consistency

branches: 1.25.8;
Provide and use some CP0 accessor functions instead of M[TF]C0 macros
for readability.

While here convert some other M[TF]C0 uses to already exising accessor
functions, e.g. mipsNN_cp0_ebase_read

Trailing whitespace

moar registers, less tpyos

add a driver for the chip's EFUSE interface, use it to find the MAC address
for the onboard ethernet controller

- sprinkle volatile
- add RNG registers
- fix some comments

fix tpyos

fix pasto

add some clock divider registers

moar registers
( clock and gpio related )

add sdmmc ('MSC') registers

more bits & registers

#define some bits in the clock gating registers

fix comments, add LCDC*_BASEs

more clock and gpio stuff

add SMBus registers

add SMBus base addresses

add gpio registers

moar registers

add memory controller registers

even more registers

appease nick

yet more registers

moar registers

moar registers!

branches: 1.1.2;
initial support for CI20 / Ingenic JZ4780
not much there yet, it loads, attaches a serial port and you can drop into
ddb

rnd(9): Omit needless locks in various HWRNG drivers.

Now that the rnd(9) API guarantees serial callbacks, we can simplify
everything a bit more.

(Some drivers like hifn(4) and sun8icrypto(4) still use locks to
coordinate with other parts of the driver to submit requests to and
process responses from the device.)

rnd(9): Adjust IPL of locks used by rndsource callbacks.

These no longer ever run from hard interrupt context or with a spin
lock held, so there is no longer any need to have them at IPL_VM to
block hard interrupts. Instead, lower them to IPL_SOFTSERIAL.

rnd_attach_source calls the callback itself now.

No need for every driver to explicitly call it to prime the pool.

Eliminate now-unused <sys/rndpool.h>.

branches: 1.4.16;
Adapt CI20 HWRNG to synchronous on-demand callback.
Omit needless softint/locking dance.
from riastradh@

Long overdue suggestions from Taylor Campbell and a few syntax/style
tweaks from myself.

From Michael McConville

branches: 1.2.2;
add attribution, no functional change.
from Michael McConville

add driver for jz4780 random number generator
From Michael McConville

branches: 1.6.8;
Provide and use some CP0 accessor functions instead of M[TF]C0 macros
for readability.

While here convert some other M[TF]C0 uses to already exising accessor
functions, e.g. mipsNN_cp0_ebase_read

pass the appropriate clock register to devices so different instances of the
same driver don't have to guess
also wire the ddc2 part to iic4 for now so we can see the monitor

- fix pclk calculation
- report CPU clock
- pass mclk to child devices
- wire up pins for MSC / sdmmc

branches: 1.3.2;
- determine bus clock, pass it to devices
- more clock enabling / gpio setup

- keep a list of devices, addresses and interrupts in apbus.c
- pass irq numbers to devices
- reduce magic numbers in device drivers
- allow multiple instances of device drivers

peripheral bus, not really tested

branches: 1.2.8;
Trailing whitespace

branches: 1.1.2;
moar registers, less tpyos

Encapsulate what's needed to attach an I2C bus into a iicbus_attach()
inline.

Merge thorpej-cfargs2.

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?).

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

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().

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!)

branches: 1.4.8; 1.4.10; 1.4.12;
Trailing whitespace

zero out struct i2cbus_attach_args before messing with it

support interrupt-driven transfers

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