summaryrefslogtreecommitdiff
path: root/src/drivers/i2c/generic/generic.c
AgeCommit message (Collapse)Author
2019-10-22AUTHORS: Move src/drivers/[a*-i*] copyrights into AUTHORS fileMartin Roth
As discussed on the mailing list and voted upon, the coreboot project is going to move the majority of copyrights out of the headers and into an AUTHORS file. This will happen a bit at a time, as we'll be unifying license headers at the same time. Updated Authors file is in a separate commit. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: I1acea8c975d14904b7e486dc57a1a67480a6ee6e Reviewed-on: https://review.coreboot.org/c/coreboot/+/36178 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-08-13drivers/i2c/generic: Add "compatible" property to _DSDFurquan Shaikh
This change adds support for allowing devices to provide a "compatible" property string that can be used when _HID is set to PRP00001. This is used to allow Linux kernel drivers to match the device to appropriate driver based on the OF-style compatible string. Reference: https://www.kernel.org/doc/Documentation/acpi/enumeration.txt BUG=b:129162037 TEST=Verified that atmel touchscreen gets enumerated correctly on kohaku using PRP0001 and compatible string. Change-Id: I8a306854c67ab2f056ea8774df46599ef0c55761 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34813 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
2019-03-08coreboot: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)Julius Werner
This patch is a raw application of find src/ -type f | xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g' Change-Id: I6262d6d5c23cabe23c242b4f38d446b74fe16b88 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31774 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-01-23src/drivers: Remove needless '&' on function pointersElyes HAOUAS
Change-Id: I7a99d0dcbc8ea1362a12a68fa519c49058d30a05 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/29868 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-09-16acpi: Call acpi_gen_writeSTA by status from device treeHung-Te Lin
The device tree now supports 'hidden' and the status can be found in `struct device.hidden`. A new acpi_device_status() will return the expected setting of STA from a `struct device`. BUG=b:72200466 BRANCH=eve TEST=Builds and boots properly on device eve Change-Id: I6dc62aff63cc3cb950739398a4dcac21836c9766 Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: https://review.coreboot.org/28567 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-06-12drivers/i2c/generic: Ensure config is not NULL before accessing itFurquan Shaikh
This change checks to ensure that config is not NULL before it is accessed for the first time. Reported by: Coverity CID #1393312 Change-Id: Ic248c79783da9c2bfdf3b7f737e5963feff7558c Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/27009 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Naresh Solanki <naresh.solanki@intel.com>
2018-06-06src/driver/i2c/{generic,hid,tpm,max}: Update device name based on devicetree.cbNaresh G Solanki
Name i2c device structure based on that in devicetree.cb Now log looks like: I2C: 01:0a (WCOM Touchscreen) I2C: 03:13 (Realtek RT5663) I2C: 03:39 (SSM4567 Right Speaker Amp) I2C: 03:3a (SSM4567 Left Speaker Amp) BUG=None BRANCH=None TEST=Build & boot Soraka Change-Id: I5dbb66ab705cd8601b8b1dc94bc6ee9f181b7be2 Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com> Reviewed-on: https://review.coreboot.org/26830 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
2018-05-02src/drivers: Add reset/enable/stop_off_ms variables to ACPI devicesShelley Chen
Some touchscreens need to adhere to certain timings during the power off sequence as well as during the power on sequence. Adding reset_off_delay_ms, enable_off_delay_ms, and stop_off_delay_ms to accommodate these devices. BUG=b:78311818 BRANCH=None TEST=./util/abuild/abuild -p none -t google/poppy -x -a Change-Id: Idb4a5dbe56eee4749d2f2b514e92c28fb2c6078f Signed-off-by: Shelley Chen <shchen@google.com> Reviewed-on: https://review.coreboot.org/25882 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
2017-09-14device: acpi_name() should take a const struct deviceAaron Durbin
There's no reason to mutate the struct device when determining the ACPI name for a device. Adjust the function pointer signature and the respective implementations to use const struct device. Change-Id: If5e1f4de36a53646616581b01f47c4e86822c42e Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/21527 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Subrata Banik <subrata.banik@intel.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2017-08-30acpigen: Add stop gpio control to power resourceFurquan Shaikh
There is at least one I2C device (being used by Soraka) that has 3 controls -- enable, reset and stop. If the stop gpio is not put into the right state when turning off the device in suspend mode, then it causes leakage. Thus, we need control in power resource to be able to stop the device when entering suspend state. BUG=b:64987428 TEST=Verified on soraka that touchscreen stop is correctly configured on suspend. Change-Id: Iae5ec7eb3972c5c7f80956d60d0d3c321bbefb0f Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/21249 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2017-08-30drivers/i2c/generic: Support additional device propertiesDuncan Laurie
Add support for providing additional free form device properties via devicetree in order to make this driver suitable for kernel drivers that need additional board-specific device properties. This currently allows adding up to 10 additional properties to a device. BUG=b:63413023 TEST=manual testing to ensure that newly added properties are in SSDT Change-Id: I2b8ceb208f4aba01053746547def6d07c8f8f3a2 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/21270 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2017-08-18include/device: Split i2c.h into threeNico Huber
Split `i2c.h` into three pieces to ease reuse of the generic defi- nitions. No code is changed. * `i2c.h` - keeps the generic definitions * `i2c_simple.h` - holds the current, limited to one controller driver per board, devicetree independent I2C interface * `i2c_bus.h` - will become the devicetree compatible interface for native I2C (e.g. non-SMBus) controllers Change-Id: I382d45c70f9314588663e1284f264f877469c74d Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/20845 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2017-03-16i2c/generic: Add support for GPIO IRQDuncan Laurie
Add support for using GPIO IRQ instead of PIRQ with an I2C device. This allows a device to use an edge triggered interrupt that will trigger on both high and low transitions. The _DSD method for describing these GPIOs has a field for 'active low' which is supposed to be 1 if the pin is active low, otherwise is zero. The value in here doesn't mean too much for GpioInt() as those will end up using the value from GpioInt() when it actually requests the interrupt. BUG=b:35581264 BRANCH=none TEST=test on Eve board that codec IRQ can be delcared as GPIO IRQ Change-Id: I02c64c7fc28dc2d608ad40db889c7242892f16db Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/18835 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
2017-02-19acpi_device: Move power resource function to generic codeDuncan Laurie
Move the function that adds a power resource block from i2c/generic to the acpi device code at src/arch/x86/acpi_device.c so it can be used by more drivers. BUG=chrome-os-partner:61233 TEST=verify SSDT table generation is unchanged Change-Id: I0ffb61a4f46028cbe912e85c0124d9f5200b9c76 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/18391 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com>
2017-01-29i2c/generic: Allow GPIOs to be put in _CRS and PowerResource in ACPIFurquan Shaikh
Linux kernel expects that power management with ACPI should always be handled using PowerResource. However, some kernel drivers (e.g. ELAN touchscreen) check to see if reset gpio is passed in by the BIOS to decide whether the device loses power in suspend. Thus, until the kernel has a better way for drivers to query if device lost power in suspend, we need to allow passing in of GPIOs via _CRS as well as exporting PowerResource to control power to the device. Update mainboards to export reset GPIO as well as PowerResource for ELAN touchscreen device. BUG=chrome-os-partner:62311,chrome-os-partner:60194 BRANCH=reef TEST=Verified that touchscreen works on power-on as well as after suspend-resume. Change-Id: I3409689cf56bfddd321402ad5dda3fc8762e6bc6 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/18238 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
2016-12-16drivers/i2c/generic: Allow mainboards to export reset and enable GPIOsFurquan Shaikh
Add power management type config option that allows mainboards to either: 1. Define a power resource that uses the reset and enable gpios to power on and off the device using _ON and _OFF methods, or 2. Export reset and enable GPIOs in _CRS and _DSD so that the OS can directly toggle the GPIOs as required. GPIO type needs to be updated in drivers_i2c_generic_config to use acpi_gpio type so that it can be used for both the above cases. BUG=chrome-os-partner:60194 BRANCH=None TEST=Verified that elan touchscreen works fine on reef using exported GPIOs. Change-Id: I4d76f193f615cfc4520869dedc55505c109042f6 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17797 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
2016-12-15drivers/i2c: Pass in i2c_generic_config into i2c_generic_fill_ssdtFurquan Shaikh
Remove any assumptions required for the drivers using i2c_generic to have drivers_i2c_generic_config structure at the start of the driver config. Instead pass in a pointer to drivers_i2c_generic_config from the calling driver. Change-Id: I51dc4cad1c1f246b51891abf7115a7120e87b098 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17857 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
2016-10-25drivers/i2c/generic: Re-factor SSDT generation codeFurquan Shaikh
1. Export i2c_generic_fill_ssdt to allow other device-specific i2c drivers to share and re-use the same code for generating AML code for SSDT. In order to achieve this, following changes are required: a. Add macro I2C_GENERIC_CONFIG that defines a structure with all generic i2c device-tree properties. This macro should be placed by the using driver at the start of its config structure. b. Accept a callback function to add any device specific information to SSDT. If generic driver is used directly by a device, callback would be NULL. Other devices using a separate i2c driver can provide a callback to add any properties to SSDT. 2. Allow device to provide _CID. BUG=chrome-os-partner:57846 Change-Id: I3a0054e22b81f9d6d407bef417eae5e9edc04ee4 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17089 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
2016-10-25drivers/i2c/generic: Enable support for adding PowerResource for deviceFurquan Shaikh
Add support to allow a device to define PowerResource in its SSDT AML code. PowerResouce ACPI generation expects SoC to define the callbacks for generating AML code for GPIO manipulation. Device requiring PowerResource needs to define following parameters: 1. Reset GPIO - Optional, GPIO to put device into reset or take it out of reset. 2. Reset delay - Delay after reset GPIO is de-asserted (default 0). 3. Enable GPIO - Optional, GPIO to enabled device. 4. Enable delay - Delay after enable GPIO is asserted (default 0). BUG=chrome-os-partner:55988 Change-Id: Ieb2dd95fc1f555f5de66f3dda425172ac5b75dad Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17081 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Tested-by: build bot (Jenkins)
2016-10-24drivers/i2c/generic: Return correct name for acpi_nameFurquan Shaikh
Return config->name if it is not NULL. BUG=chrome-os-partner:55988 Change-Id: I9ae229949b73de6f991383daae8d962d6cf457a7 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17077 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-09-28drivers/i2c/generic: Add config for marking device as probedDuncan Laurie
Add a config option to the generic I2C device driver to indicate to the OS that this device should be probed before being added. This can be used to provide ACPI device instantiations to devices that may not actually exist on the board. For example, if multiple trackpad vendors are supported on the same board they can both be described in ACPI and the OS will probe the address and load the driver only if the device responds to the probe at that address. BUG=chrome-os-partner:57686 Change-Id: I22cffb4b15f25d97dfd37dc58bca315f57bafc59 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16742 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-06-22drivers/i2c/generic: Fix compile failureDuncan Laurie
This variable name was changed in chip.h but not the consumer and it was submitted before it was caught. Change-Id: I7c492b588b2fd854a9eeac36029a46da324a7b1b Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/15109 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-06-02i2c: Add a generic i2c driverDuncan Laurie
This adds a generic I2C driver that can be described in the devicetree and used to generate ACPI objects in the SSDT based on the information provided in the config registers. The I2C bus can be configured and the device can provide an interrupt and wake capability to the OS. A configuration option allows for a GPIO to be provided that will be checked to determine if the device is preset on the board before including it in the generated SSDT. The driver is generic enough to be used for basic I2C devices that do not have special configuration needs such as touchpads, touchscreens, sensors, some audio codec/amplifiers, etc. Sample usage for a touchpad device: device pci 15.1 on chip drivers/i2c/generic register "hid" = ""ELAN0000"" register "desc" = "ELAN Touchpad" register "irq" = "IRQ_EDGE_LOW(GPP_B3_IRQ)" register "wake" = "GPE0_DW0_05" device i2c 15.0 on end end end Will result in the following code in the SSDT: Scope (\_SB.PCI0.I2C1) { Device (D015) { Name (_HID, "ELAN0000") Name (_UID, 0) Name (_S0W, 4) Name (_PRW, Package () { 5, 3 }) Method (_STA) { Return (0x0f) } Name (_CRS, ResourceTemplate () { I2cSerialBus (0x15, ControllerInitiated, 400000, AddressingMode7Bit, "\\_S.PCI0.I2C1", 0, ResourceConsumer) Interrupt (ResourceConsumer, Edge, ActiveLow) { 51 } }) } } Change-Id: Ib32055720835b70e91ede5e4028ecd91894d70d5 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/15016 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 08:56:00 +0000