Commit Graph

103 Commits

Author SHA1 Message Date
Michael Zhilin
662e30fca3 [gpioths] new driver for temperature/humidity sensor DHT11
This patch adds driver for temperature/humidity sensor connected via GPIO.
To compile it into kernel add "device gpioths". To activate driver, use
hints (.at and .pins) for gpiobus. As result it will provide temperature &
humidity values via sysctl.

DHT11 is cheap & popular temperature/humidity sensor used via GPIO on ARM
or MIPS devices like Raspberry Pi or Onion Omega.

Reviewed by:	adrian
Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D9185
2017-01-16 15:36:36 +00:00
Luiz Otavio O Souza
4723c14fa9 Convert gpioc to use the make_dev_s(9) KPI. This fix a possible race where
si_drv1 can be accessed before it gets set.

This is inspired on r311700.

MFC after:	3 days
2017-01-08 20:41:32 +00:00
Ian Lepore
ee2c73e559 Only write to *active once, even when GPIO_ACTIVE_LOW is set. 2017-01-07 22:55:23 +00:00
Michael Zhilin
d1c38239e8 [gpiospi] add clock delay to avoid smashing of bits
Submitted by:	Hiroki Mori <yamori83@yahoo.co.jp>
Reviewed by:	loos, ray, mizhka
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D8749
2016-12-13 10:03:29 +00:00
Luiz Otavio O Souza
a9a7fbcc58 Remove a too strict test and instead, just filter the passed flags with the
supported capabilities.

Spotted by:	yamori813@yahoo.co.jp (Hiroki Mori)
MFC after:	2 weeks
2016-12-13 03:36:41 +00:00
Oleksandr Tymoshenko
fd98051117 [bytgpio] prepare bytgpio(4) for modularization
- Add detach method
- module should depend on gpiobus, not gpio
2016-11-21 19:43:01 +00:00
Oleksandr Tymoshenko
06ae3ba328 [bytgpio] Fix USB disconnect event after listsing pins on gpioc2
- Do not set input flag when reading value from GPIO pin, it is not
  required and for gpioc2(S5 bank) setting both input and output flags
  leads to some kind of electric interference (curren drop?) that
  causes USB devices to disconnect

- Check pad configuration when attaching device and provide IN/OUT
  capabilities only for pads that are configured as GPIO. Do not let
  user code to configure or change value of non-GPIO pads. There is
  no information for NC bank in intel's datasheet so for now function
  check is ignored for pins in it

Reported by:	Frank H.
MFC after:	3 days
2016-11-20 18:38:32 +00:00
Ruslan Bukin
8e621af540 Make gpiobus early driver at BUS_PAS_BUS.
The gpiobus driver is attached explicitly and generally should be
at the same pass as its parent. Making it use BUS_PAS_BUS ensures
that it attaches immediately after parent adds it (assuming the
parent itself attached at BUS_PAS_BUS and above).

Submitted by:	kan
Sponsored by:	DARPA, AFRL
2016-11-17 15:37:44 +00:00
Justin Hibbits
099a0e1bea Add a GPIO poweroff and reset driver.
Summary:
This implements part of the gpio-poweroff and gpio-restart device tree
bindings.  Optional properties are not handled currently.  It also currently
only supports level-triggered reset.

Reviewed By: gonzo
Differential Revision: https://reviews.freebsd.org/D8521
2016-11-16 02:14:07 +00:00
Oleksandr Tymoshenko
aabc5ce043 Refactor FDT part of gpioled driver
- Split driver in two parts: FDT and non-FDT
- Instead of reattach gpioled nodes to GPIO bus use
    gpio_pin_get_by_ofw_idx and add ofwbus and simplebus as parrent buses

Reviewed by:	loos
Differential Revision:	https://reviews.freebsd.org/D8233
2016-11-07 21:15:39 +00:00
Oleksandr Tymoshenko
95a3636709 [gpio] Add GPIO driver for Intel Bay Trail SoC
Bay Trail has three banks of GPIOs exposed to userland as /dev/gpiocN,
where N is 1, 2, and 3. Pins in each bank are pre-named to match names
on boards schematics: GPIO_S0_SCnn, GPIO_S0_NCnn, and GPIO_S5_nn.

Controller supports edge-triggered and level-triggered interrupts but
current version of the driver does not have interrupts support
2016-11-04 16:24:38 +00:00
Andrew Turner
1fb2428f1c Stop including a possibly GPLd header from the GPIO code. Add the only
needed macro to ofw_gpiobus.c.

Reported by:	emaste
Sponsored by:	DARPA, AFRL
2016-10-26 12:41:44 +00:00
Jared McNeill
72f1cf0446 Add driver for GPIO controlled regulator.
Reviewed by:		gonzo, manu, mmel
Differential Revision:	https://reviews.freebsd.org/D8257
2016-10-15 20:04:14 +00:00
Adrian Chadd
01decb509d [gpio] include intr.h when building with INTRNG.
Trying to build a MIPS platform that uses INTRNG needs this
for this to work right in gpiobusvar.h :

#ifdef INTRNG
struct intr_map_data_gpio {
        struct intr_map_data    hdr;
...
};
#endif
2016-09-09 04:54:41 +00:00
Michal Meloun
895c8b1c39 INTRNG: Rework handling with resources. Partially revert r301453.
- Read interrupt properties at bus enumeration time and store
   it into global mapping table.
 - At bus_activate_resource() time, given mapping entry is resolved and
   connected to real interrupt source. A copy of mapping entry is attached
   to given resource.
 - At bus_setup_intr() time, mapping entry stored in resource is used
   for delivery of requested interrupt configuration.
 - For MSI/MSIX interrupts, mapping entry is created within
   pci_alloc_msi()/pci_alloc_msix() call.
 - For legacy PCI interrupts, mapping entry must be created within
   pcib_route_interrupt() by pcib driver itself.

Reviewed by: nwhitehorn, andrew
Differential Revision: https://reviews.freebsd.org/D7493
2016-08-19 10:52:39 +00:00
Adrian Chadd
d75e8c5089 [gpioled] add support for inverting the LED polarity.
No, this isn't a star trek science joke - sometimes LEDs are wired
up to be active low, so this is needed.

Submitted by:	Dan Nelson <dnelson_1901@yahoo.com>
2016-07-31 06:24:26 +00:00
Michal Meloun
949883bd72 INTRNG: As follow up of r301451, implement mapping and configuration
of gpio pin interrupts by new way.

Note: This removes last consumer of intr_ddata machinery and we remove it
in separate commit.
2016-06-07 05:08:24 +00:00
Svatopluk Kraus
ad5244ece1 INTRNG - change the way how an interrupt mapping data are provided
to the framework in OFW (FDT) case.

This is a follow-up to r301451.

Differential Revision:	https://reviews.freebsd.org/D6634
2016-06-05 16:20:12 +00:00
Ian Lepore
781ca89cf6 Don't wrap the declaration of gpio_alloc_intr_resource() in #ifdef INTRNG,
wrap the implementation so that it returns an error if INTRNG support is
not available.  It should be possible to write a non-INTRNG implementation
of this function some day.  In the meantime, there is code that contains
calls to this function (so the decl is needed), but have runtime checks to
avoid calling it in the non-INTRNG case.
2016-05-27 20:41:25 +00:00
Ian Lepore
128e3872b9 Add a PPS driver that takes the timing pulse from a gpio pin. Currently
supports only ofw/fdt systems.  Some day, hinted attachment for non-fdt
systems should be possible too.
2016-05-26 23:56:12 +00:00
Ian Lepore
5030d499e7 Add a convenience function to get a gpio pin's capabilties. 2016-05-26 22:35:52 +00:00
Ian Lepore
c45b842250 Rename gpiobus_map_pin() to gpiobus_acquire_pin(), to better reflect the
fact that the caller is requesting exclusive use of the pin, and also to
better match the inverse operation which is named gpiobus_release_pin().
2016-05-26 15:45:36 +00:00
Adrian Chadd
6c6f602b53 [gpiospi] add initial gpio SPI bit bang driver.
Submitted by:	ray
Obtained from:	zrouter
2016-05-26 07:20:33 +00:00
Luiz Otavio O Souza
0397efe813 Sort and remove a couple of unnecessary headers. 2016-05-22 04:02:34 +00:00
Luiz Otavio O Souza
03302aa37f Get rid of two consumers of gpiobus acquire/release.
The GPIO hardware should not be owned by a single device, this defeats any
chance of use of the GPIO controller as an interrupt source.

ow(4) is now the only consumer of this 'feature' before we can remove it
for good.

Discussed with:	ian, bsdimp
2016-05-22 03:55:57 +00:00
Luiz Otavio O Souza
16119eeded Use a better prefix for defines, return BUS_PROBE_DEFAULT for probe routine.
Refuse to attach if the number of given pins is not enough for our needs.
2016-05-22 03:34:18 +00:00
Luiz Otavio O Souza
fc5f218ade Fix probe routine to return BUS_PROBE_DEFAULT instead of BUS_PROBE_SPECIFIC.
While here fix a few style(9) issues.
2016-05-22 03:12:49 +00:00
Michal Meloun
e3da01a384 OFWGPIOBUS: Make ofwgpiobus_devclass externaly visible.
It's needed for binding of gpio controllers.
2016-05-15 14:43:52 +00:00
Oleksandr Tymoshenko
3c977d6f36 Fix detach routine for gpiokeys
- Release pin only when all per=key callouts are stopped
- Unregister keyboard when detaching device node
2016-05-12 20:15:23 +00:00
Oleksandr Tymoshenko
f058b6fbee Properly release mapped pin in gpio_pin_release 2016-05-12 20:13:16 +00:00
Oleksandr Tymoshenko
3381a3898a Add gpiobus_release_pin function to release mapped pin
Add gpiobus_release_pin as a counterpart for gpiobus_map_pin. Without it
it's impossible to properly release pin so if kernel module is reloaded
it can't re-use pins again
2016-05-12 20:12:45 +00:00
Oleksandr Tymoshenko
bc90a48ccf Add OF_prop_free function as a counterpart for OF_*prop_alloc
- Introduce new OF API function OF_prop_free to free memory allocated by
  OF_getprop_alloc and OF_getencprop_alloc. Current code just calls free(9)
  with M_OFWPROP memory class which assumes knowledge about OF_*prop_alloc
  functions' internals and leads to unneccessary code coupling

- Convert some of the free(..., M_OFWPROP) instances to OF_prop_free

Files affected by this commit are the ones I was able to test on real
hardware. The rest of free(..., M_OFWPROP) instances will be handled with
idividual maintainers

Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D6315
2016-05-11 18:20:02 +00:00
Oleksandr Tymoshenko
5a333f6f5f Add gpiokeys driver
gpiokey driver implements functional subset of gpiokeys device-tree bindings:
https://www.kernel.org/doc/Documentation/devicetree/bindings/input/gpio-keys.txt

It acts as a virtual keyboard, so keys are visible through kbdmux(4)

Driver maps linux scancodes for most common keys to FreeBSD scancodes and
also extends spec by introducing freebsd,code property to specify
FreeBSD-native scancodes.

Reviewed by:	mmel, jmcneill
Differential Revision:	https://reviews.freebsd.org/D6279
2016-05-11 17:57:26 +00:00
Oleksandr Tymoshenko
e2a1919df0 Use DEVMETHOD_END instead of its value to indicate end of methods table 2016-05-11 00:34:43 +00:00
Oleksandr Tymoshenko
26c36284a9 Use GPIO pin management API in gpiobacklight
- Get rid of hack with re-parenting gpio-leds node to gpiobus
- Use gpio_pin_set_active to enable/disable backlight, it automatically
    takes care of active-low pins
2016-05-11 00:26:52 +00:00
Oleksandr Tymoshenko
51702162cc Pass device tree node as a part of gpio_pin_get_by_ofw_XXX API
Current API assumes that "gpios" property belongs to the device's node but for
some binding it's not true: gpiokeys has set of child nodes with this property.

Patch adds new argument instead of replacing device_t because device_t will be
used to track ownership for allocated pins

Reviewed by:	mmel
Differential Revision:	https://reviews.freebsd.org/D6277
2016-05-10 20:02:03 +00:00
Michal Meloun
8442087f15 INTRNG: Define 'INTR_IRQ_INVALID' constant and use it consistently
as error indicator.
2016-04-28 12:04:12 +00:00
Michal Meloun
39f6c1bdf4 GPIO: Add support for gpio pin interrupts.
Add new function gpio_alloc_intr_resource(), which allows an allocation
of interrupt resource associated to given gpio pin. It also allows to
specify interrupt configuration.

Note: This functionality is dependent on INTRNG, and must be
implemented in each GPIO controller.
2016-04-28 12:03:22 +00:00
Oleksandr Tymoshenko
71c1e74434 Fix IIC "how" argument dereferencing on big-endian platforms
"how" argument is passed as value of int* pointer to callback
function but dereferenced as char* so only one byte taken into
into account. On little-endian systems it happens to work because
first byte is LSB that contains actual value, on big-endian it's
MSB and in this case it's always equal zero

PR:		207786
Submitted by:	chadf@triularity.org
2016-04-10 23:17:06 +00:00
Justin Hibbits
f8fd3fb518 Fix the resource_list_print_type() calls to use uintmax_t.
Missed a bunch from r297000.
2016-03-22 22:25:08 +00:00
Michal Meloun
12bc2abb4f Use EARLY_DRIVER_MODULE() with BUS_PASS_BUS priority for ofw_gpiobus
and ofw_iicbus. This causes enumeration of gpiobus/iicbus at the base driver
attach time. Due to this, childern drivers can be also attached early.
2016-03-15 15:24:18 +00:00
Michal Meloun
8a4ba03859 OFW_GPIOBUS: Add utility functions for easier handling of OFW GPIO pins.
Reviewed by: ian, loos (paritaly)
2016-03-01 16:10:15 +00:00
Justin Hibbits
7915adb560 Introduce a RMAN_IS_DEFAULT_RANGE() macro, and use it.
This simplifies checking for default resource range for bus_alloc_resource(),
and improves readability.

This is part of, and related to, the migration of rman_res_t from u_long to
uintmax_t.

Discussed with:	jhb
Suggested by:	marcel
2016-02-20 01:32:58 +00:00
Justin Hibbits
2dd1bdf183 Convert rman to use rman_res_t instead of u_long
Summary:
Migrate to using the semi-opaque type rman_res_t to specify rman resources.  For
now, this is still compatible with u_long.

This is step one in migrating rman to use uintmax_t for resources instead of
u_long.

Going forward, this could feasibly be used to specify architecture-specific
definitions of resource ranges, rather than baking a specific integer type into
the API.

This change has been broken out to facilitate MFC'ing drivers back to 10 without
breaking ABI.

Reviewed By: jhb
Sponsored by:	Alex Perez/Inertial Computing
Differential Revision: https://reviews.freebsd.org/D5075
2016-01-27 02:23:54 +00:00
Adrian Chadd
82104eda6a [gpiobus] handle the case of there being a single GPIO pin available.
PR:		kern/206035
Submitted by:	Stanislav Galabov <sgalabov@gmail.com>
2016-01-14 02:58:28 +00:00
Luiz Otavio O Souza
c0dca72a18 Fix the use of plural in two cases that I missed on r285784.
This should cause no functional change.
2015-08-18 21:37:14 +00:00
Luiz Otavio O Souza
e9aebbb018 gpioled(4) depends on gpiobus.
This fixes the loading of gpioled as a module.

Sponsored by:	Rubicon Communications (Netgate)
2015-08-17 17:09:57 +00:00
Luiz Otavio O Souza
978cdbedcd Fix a few bugs when gpiobus is detaching:
- Detach the gpiobus and the gpioc devices from the GPIO controller.

 - Fix the leak of gpiobus IRQ rman(9) region descriptor.

 - Fix the leak of child ivars and IRQ resource list.

While here return NULL (instead of 0) for a device_t that fails to allocate
the ivar memory.

Tested with gpiobus built as a module.

Sponsored by:	Rubicon Communications (Netgate)
2015-08-17 16:51:37 +00:00
Oleksandr Tymoshenko
40ebf1626f Add GPIO backlight driver compatible with Linux FDT bindings.
Brightness is controlled through sysctl dev.gpiobacklight.X.brightness:
  - any value greater than 0: backlight is on
  - any value less than or equal to  0: backlight is off

FDT bindings docs in Linux tree:
    Documentation/devicetree/bindings/video/backlight/gpio-backlight.txt
2015-07-30 19:04:14 +00:00
Warner Losh
d2e3ed5af6 Panic when a device is trying to recursively acquire rather than hang
indefinitely. Improve error messages from other panics.
2015-07-24 04:56:46 +00:00